Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband

* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband:
  IB/mlx4: Add a driver Mellanox ConnectX InfiniBand adapters
  IB: Put rlimit accounting struct in struct ib_umem
  IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules

drivers/infiniband/Kconfig

@@ -29,6 +29,11 @@ config INFINIBAND_USER_ACCESS
 	  libibverbs, libibcm and a hardware driver library from
 	  <http://www.openib.org>.
 
+config INFINIBAND_USER_MEM
+	bool
+	depends on INFINIBAND_USER_ACCESS != n
+	default y
+
 config INFINIBAND_ADDR_TRANS
 	bool
 	depends on INFINIBAND && INET
@@ -40,6 +45,8 @@ source "drivers/infiniband/hw/ehca/Kconfig"
 source "drivers/infiniband/hw/amso1100/Kconfig"
 source "drivers/infiniband/hw/cxgb3/Kconfig"
 
+source "drivers/infiniband/hw/mlx4/Kconfig"
+
 source "drivers/infiniband/ulp/ipoib/Kconfig"
 
 source "drivers/infiniband/ulp/srp/Kconfig"

drivers/infiniband/Makefile

@@ -4,6 +4,7 @@ obj-$(CONFIG_INFINIBAND_IPATH)		+= hw/ipath/
 obj-$(CONFIG_INFINIBAND_EHCA)		+= hw/ehca/
 obj-$(CONFIG_INFINIBAND_AMSO1100)	+= hw/amso1100/
 obj-$(CONFIG_INFINIBAND_CXGB3)		+= hw/cxgb3/
+obj-$(CONFIG_MLX4_INFINIBAND)		+= hw/mlx4/
 obj-$(CONFIG_INFINIBAND_IPOIB)		+= ulp/ipoib/
 obj-$(CONFIG_INFINIBAND_SRP)		+= ulp/srp/
 obj-$(CONFIG_INFINIBAND_ISER)		+= ulp/iser/

drivers/infiniband/core/Makefile

@@ -9,6 +9,7 @@ obj-$(CONFIG_INFINIBAND_USER_ACCESS) +=	ib_uverbs.o ib_ucm.o \
 
 ib_core-y :=			packer.o ud_header.o verbs.o sysfs.o \
 				device.o fmr_pool.o cache.o
+ib_core-$(CONFIG_INFINIBAND_USER_MEM) += umem.o
 
 ib_mad-y :=			mad.o smi.o agent.o mad_rmpp.o
 
@@ -28,5 +29,4 @@ ib_umad-y :=			user_mad.o
 
 ib_ucm-y :=			ucm.o
 
-ib_uverbs-y :=			uverbs_main.o uverbs_cmd.o uverbs_mem.o \
-				uverbs_marshall.o
+ib_uverbs-y :=			uverbs_main.o uverbs_cmd.o uverbs_marshall.o

drivers/infiniband/core/device.c

@@ -613,6 +613,8 @@ static void __exit ib_core_cleanup(void)
 {
 	ib_cache_cleanup();
 	ib_sysfs_cleanup();
+	/* Make sure that any pending umem accounting work is done. */
+	flush_scheduled_work();
 }
 
 module_init(ib_core_init);

drivers/infiniband/core/uverbs_mem.c → drivers/infiniband/core/umem.c

@@ -39,13 +39,6 @@
 
 #include "uverbs.h"
 
-struct ib_umem_account_work {
-	struct work_struct work;
-	struct mm_struct  *mm;
-	unsigned long      diff;
-};
-
-
 static void __ib_umem_release(struct ib_device *dev, struct ib_umem *umem, int dirty)
 {
 	struct ib_umem_chunk *chunk, *tmp;
@@ -64,35 +57,56 @@ static void __ib_umem_release(struct ib_device *dev, struct ib_umem *umem, int d
 	}
 }
 
-int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,
-		void *addr, size_t size, int write)
+/**
+ * ib_umem_get - Pin and DMA map userspace memory.
+ * @context: userspace context to pin memory for
+ * @addr: userspace virtual address to start at
+ * @size: length of region to pin
+ * @access: IB_ACCESS_xxx flags for memory being pinned
+ */
+struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
+			    size_t size, int access)
 {
+	struct ib_umem *umem;
 	struct page **page_list;
 	struct ib_umem_chunk *chunk;
 	unsigned long locked;
 	unsigned long lock_limit;
 	unsigned long cur_base;
 	unsigned long npages;
-	int ret = 0;
+	int ret;
 	int off;
 	int i;
 
 	if (!can_do_mlock())
-		return -EPERM;
+		return ERR_PTR(-EPERM);
 
-	page_list = (struct page **) __get_free_page(GFP_KERNEL);
-	if (!page_list)
-		return -ENOMEM;
+	umem = kmalloc(sizeof *umem, GFP_KERNEL);
+	if (!umem)
+		return ERR_PTR(-ENOMEM);
+
+	umem->context   = context;
+	umem->length    = size;
+	umem->offset    = addr & ~PAGE_MASK;
+	umem->page_size = PAGE_SIZE;
+	/*
+	 * We ask for writable memory if any access flags other than
+	 * "remote read" are set.  "Local write" and "remote write"
+	 * obviously require write access.  "Remote atomic" can do
+	 * things like fetch and add, which will modify memory, and
+	 * "MW bind" can change permissions by binding a window.
+	 */
+	umem->writable  = !!(access & ~IB_ACCESS_REMOTE_READ);
 
-	mem->user_base = (unsigned long) addr;
-	mem->length    = size;
-	mem->offset    = (unsigned long) addr & ~PAGE_MASK;
-	mem->page_size = PAGE_SIZE;
-	mem->writable  = write;
+	INIT_LIST_HEAD(&umem->chunk_list);
 
-	INIT_LIST_HEAD(&mem->chunk_list);
+	page_list = (struct page **) __get_free_page(GFP_KERNEL);
+	if (!page_list) {
+		kfree(umem);
+		return ERR_PTR(-ENOMEM);
+	}
 
-	npages = PAGE_ALIGN(size + mem->offset) >> PAGE_SHIFT;
+	npages = PAGE_ALIGN(size + umem->offset) >> PAGE_SHIFT;
 
 	down_write(&current->mm->mmap_sem);
 
@@ -104,13 +118,13 @@ int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,
 		goto out;
 	}
 
-	cur_base = (unsigned long) addr & PAGE_MASK;
+	cur_base = addr & PAGE_MASK;
 
 	while (npages) {
 		ret = get_user_pages(current, current->mm, cur_base,
 				     min_t(int, npages,
 					   PAGE_SIZE / sizeof (struct page *)),
-				     1, !write, page_list, NULL);
+				     1, !umem->writable, page_list, NULL);
 
 		if (ret < 0)
 			goto out;
@@ -136,7 +150,7 @@ int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,
 				chunk->page_list[i].length = PAGE_SIZE;
 			}
 
-			chunk->nmap = ib_dma_map_sg(dev,
+			chunk->nmap = ib_dma_map_sg(context->device,
 						    &chunk->page_list[0],
 						    chunk->nents,
 						    DMA_BIDIRECTIONAL);
@@ -151,75 +165,94 @@ int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,
 
 			ret -= chunk->nents;
 			off += chunk->nents;
-			list_add_tail(&chunk->list, &mem->chunk_list);
+			list_add_tail(&chunk->list, &umem->chunk_list);
 		}
 
 		ret = 0;
 	}
 
 out:
-	if (ret < 0)
-		__ib_umem_release(dev, mem, 0);
-	else
+	if (ret < 0) {
+		__ib_umem_release(context->device, umem, 0);
+		kfree(umem);
+	} else
 		current->mm->locked_vm = locked;
 
 	up_write(&current->mm->mmap_sem);
 	free_page((unsigned long) page_list);
 
-	return ret;
+	return ret < 0 ? ERR_PTR(ret) : umem;
 }
+EXPORT_SYMBOL(ib_umem_get);
 
-void ib_umem_release(struct ib_device *dev, struct ib_umem *umem)
+static void ib_umem_account(struct work_struct *work)
 {
-	__ib_umem_release(dev, umem, 1);
-
-	down_write(&current->mm->mmap_sem);
-	current->mm->locked_vm -=
-		PAGE_ALIGN(umem->length + umem->offset) >> PAGE_SHIFT;
-	up_write(&current->mm->mmap_sem);
-}
+	struct ib_umem *umem = container_of(work, struct ib_umem, work);
 
-static void ib_umem_account(struct work_struct *_work)
-{
-	struct ib_umem_account_work *work =
-		container_of(_work, struct ib_umem_account_work, work);
-
-	down_write(&work->mm->mmap_sem);
-	work->mm->locked_vm -= work->diff;
-	up_write(&work->mm->mmap_sem);
-	mmput(work->mm);
-	kfree(work);
+	down_write(&umem->mm->mmap_sem);
+	umem->mm->locked_vm -= umem->diff;
+	up_write(&umem->mm->mmap_sem);
+	mmput(umem->mm);
+	kfree(umem);
 }
 
-void ib_umem_release_on_close(struct ib_device *dev, struct ib_umem *umem)
+/**
+ * ib_umem_release - release memory pinned with ib_umem_get
+ * @umem: umem struct to release
+ */
+void ib_umem_release(struct ib_umem *umem)
 {
-	struct ib_umem_account_work *work;
+	struct ib_ucontext *context = umem->context;
 	struct mm_struct *mm;
+	unsigned long diff;
 
-	__ib_umem_release(dev, umem, 1);
+	__ib_umem_release(umem->context->device, umem, 1);
 
 	mm = get_task_mm(current);
 	if (!mm)
 		return;
 
+	diff = PAGE_ALIGN(umem->length + umem->offset) >> PAGE_SHIFT;
+
 	/*
 	 * We may be called with the mm's mmap_sem already held.  This
 	 * can happen when a userspace munmap() is the call that drops
 	 * the last reference to our file and calls our release
 	 * method.  If there are memory regions to destroy, we'll end
-	 * up here and not be able to take the mmap_sem.  Therefore we
-	 * defer the vm_locked accounting to the system workqueue.
+	 * up here and not be able to take the mmap_sem.  In that case
+	 * we defer the vm_locked accounting to the system workqueue.
 	 */
+	if (context->closing && !down_write_trylock(&mm->mmap_sem)) {
+		INIT_WORK(&umem->work, ib_umem_account);
+		umem->mm   = mm;
+		umem->diff = diff;
 
-	work = kmalloc(sizeof *work, GFP_KERNEL);
-	if (!work) {
-		mmput(mm);
+		schedule_work(&umem->work);
 		return;
-	}
+	} else
+		down_write(&mm->mmap_sem);
+
+	current->mm->locked_vm -= diff;
+	up_write(&mm->mmap_sem);
+	mmput(mm);
+	kfree(umem);
+}
+EXPORT_SYMBOL(ib_umem_release);
+
+int ib_umem_page_count(struct ib_umem *umem)
+{
+	struct ib_umem_chunk *chunk;
+	int shift;
+	int i;
+	int n;
+
+	shift = ilog2(umem->page_size);
 
-	INIT_WORK(&work->work, ib_umem_account);
-	work->mm   = mm;
-	work->diff = PAGE_ALIGN(umem->length + umem->offset) >> PAGE_SHIFT;
+	n = 0;
+	list_for_each_entry(chunk, &umem->chunk_list, list)
+		for (i = 0; i < chunk->nmap; ++i)
+			n += sg_dma_len(&chunk->page_list[i]) >> shift;
 
-	schedule_work(&work->work);
+	return n;
 }
+EXPORT_SYMBOL(ib_umem_page_count);

drivers/infiniband/core/uverbs.h

@@ -45,6 +45,7 @@
 #include <linux/completion.h>
 
 #include <rdma/ib_verbs.h>
+#include <rdma/ib_umem.h>
 #include <rdma/ib_user_verbs.h>
 
 /*
@@ -163,11 +164,6 @@ void ib_uverbs_srq_event_handler(struct ib_event *event, void *context_ptr);
 void ib_uverbs_event_handler(struct ib_event_handler *handler,
 			     struct ib_event *event);
 
-int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,
-		void *addr, size_t size, int write);
-void ib_umem_release(struct ib_device *dev, struct ib_umem *umem);
-void ib_umem_release_on_close(struct ib_device *dev, struct ib_umem *umem);
-
 #define IB_UVERBS_DECLARE_CMD(name)					\
 	ssize_t ib_uverbs_##name(struct ib_uverbs_file *file,		\
 				 const char __user *buf, int in_len,	\

drivers/infiniband/core/uverbs_cmd.c

 /*
  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
- * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
  * Copyright (c) 2006 Mellanox Technologies.  All rights reserved.
  *
@@ -295,6 +295,7 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 	INIT_LIST_HEAD(&ucontext->qp_list);
 	INIT_LIST_HEAD(&ucontext->srq_list);
 	INIT_LIST_HEAD(&ucontext->ah_list);
+	ucontext->closing = 0;
 
 	resp.num_comp_vectors = file->device->num_comp_vectors;
 
@@ -573,7 +574,7 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 	struct ib_uverbs_reg_mr      cmd;
 	struct ib_uverbs_reg_mr_resp resp;
 	struct ib_udata              udata;
-	struct ib_umem_object       *obj;
+	struct ib_uobject           *uobj;
 	struct ib_pd                *pd;
 	struct ib_mr                *mr;
 	int                          ret;
@@ -599,35 +600,21 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 	    !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
 		return -EINVAL;
 
-	obj = kmalloc(sizeof *obj, GFP_KERNEL);
-	if (!obj)
+	uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
+	if (!uobj)
 		return -ENOMEM;
 
-	init_uobj(&obj->uobject, 0, file->ucontext, &mr_lock_key);
-	down_write(&obj->uobject.mutex);
-
-	/*
-	 * We ask for writable memory if any access flags other than
-	 * "remote read" are set.  "Local write" and "remote write"
-	 * obviously require write access.  "Remote atomic" can do
-	 * things like fetch and add, which will modify memory, and
-	 * "MW bind" can change permissions by binding a window.
-	 */
-	ret = ib_umem_get(file->device->ib_dev, &obj->umem,
-			  (void *) (unsigned long) cmd.start, cmd.length,
-			  !!(cmd.access_flags & ~IB_ACCESS_REMOTE_READ));
-	if (ret)
-		goto err_free;
-
-	obj->umem.virt_base = cmd.hca_va;
+	init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
+	down_write(&uobj->mutex);
 
 	pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 	if (!pd) {
 		ret = -EINVAL;
-		goto err_release;
+		goto err_free;
 	}
 
-	mr = pd->device->reg_user_mr(pd, &obj->umem, cmd.access_flags, &udata);
+	mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
+				     cmd.access_flags, &udata);
 	if (IS_ERR(mr)) {
 		ret = PTR_ERR(mr);
 		goto err_put;
@@ -635,19 +622,19 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 
 	mr->device  = pd->device;
 	mr->pd      = pd;
-	mr->uobject = &obj->uobject;
+	mr->uobject = uobj;
 	atomic_inc(&pd->usecnt);
 	atomic_set(&mr->usecnt, 0);
 
-	obj->uobject.object = mr;
-	ret = idr_add_uobj(&ib_uverbs_mr_idr, &obj->uobject);
+	uobj->object = mr;
+	ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
 	if (ret)
 		goto err_unreg;
 
 	memset(&resp, 0, sizeof resp);
 	resp.lkey      = mr->lkey;
 	resp.rkey      = mr->rkey;
-	resp.mr_handle = obj->uobject.id;
+	resp.mr_handle = uobj->id;
 
 	if (copy_to_user((void __user *) (unsigned long) cmd.response,
 			 &resp, sizeof resp)) {
@@ -658,17 +645,17 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 	put_pd_read(pd);
 
 	mutex_lock(&file->mutex);
-	list_add_tail(&obj->uobject.list, &file->ucontext->mr_list);
+	list_add_tail(&uobj->list, &file->ucontext->mr_list);
 	mutex_unlock(&file->mutex);
 
-	obj->uobject.live = 1;
+	uobj->live = 1;
 
-	up_write(&obj->uobject.mutex);
+	up_write(&uobj->mutex);
 
 	return in_len;
 
 err_copy:
-	idr_remove_uobj(&ib_uverbs_mr_idr, &obj->uobject);
+	idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 
 err_unreg:
 	ib_dereg_mr(mr);
@@ -676,11 +663,8 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 err_put:
 	put_pd_read(pd);
 
-err_release:
-	ib_umem_release(file->device->ib_dev, &obj->umem);
-
 err_free:
-	put_uobj_write(&obj->uobject);
+	put_uobj_write(uobj);
 	return ret;
 }
 
@@ -691,7 +675,6 @@ ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 	struct ib_uverbs_dereg_mr cmd;
 	struct ib_mr             *mr;
 	struct ib_uobject	 *uobj;
-	struct ib_umem_object    *memobj;
 	int                       ret = -EINVAL;
 
 	if (copy_from_user(&cmd, buf, sizeof cmd))
@@ -701,8 +684,7 @@ ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 	if (!uobj)
 		return -EINVAL;
 
-	memobj = container_of(uobj, struct ib_umem_object, uobject);
-	mr     = uobj->object;
+	mr = uobj->object;
 
 	ret = ib_dereg_mr(mr);
 	if (!ret)
@@ -719,8 +701,6 @@ ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 	list_del(&uobj->list);
 	mutex_unlock(&file->mutex);
 
-	ib_umem_release(file->device->ib_dev, &memobj->umem);
-
 	put_uobj(uobj);
 
 	return in_len;

drivers/infiniband/core/uverbs_main.c

@@ -183,6 +183,8 @@ static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
 	if (!context)
 		return 0;
 
+	context->closing = 1;
+
 	list_for_each_entry_safe(uobj, tmp, &context->ah_list, list) {
 		struct ib_ah *ah = uobj->object;
 
@@ -230,16 +232,10 @@ static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
 
 	list_for_each_entry_safe(uobj, tmp, &context->mr_list, list) {
 		struct ib_mr *mr = uobj->object;
-		struct ib_device *mrdev = mr->device;
-		struct ib_umem_object *memobj;
 
 		idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 		ib_dereg_mr(mr);
-
-		memobj = container_of(uobj, struct ib_umem_object, uobject);
-		ib_umem_release_on_close(mrdev, &memobj->umem);
-
-		kfree(memobj);
+		kfree(uobj);
 	}
 
 	list_for_each_entry_safe(uobj, tmp, &context->pd_list, list) {
@@ -906,7 +902,6 @@ static void __exit ib_uverbs_cleanup(void)
 	unregister_filesystem(&uverbs_event_fs);
 	class_destroy(uverbs_class);
 	unregister_chrdev_region(IB_UVERBS_BASE_DEV, IB_UVERBS_MAX_DEVICES);
-	flush_scheduled_work();
 	idr_destroy(&ib_uverbs_pd_idr);
 	idr_destroy(&ib_uverbs_mr_idr);
 	idr_destroy(&ib_uverbs_mw_idr);

drivers/infiniband/hw/amso1100/c2_provider.c

@@ -56,6 +56,7 @@
 #include <asm/byteorder.h>
 
 #include <rdma/ib_smi.h>
+#include <rdma/ib_umem.h>
 #include <rdma/ib_user_verbs.h>
 #include "c2.h"
 #include "c2_provider.h"
@@ -396,6 +397,7 @@ static struct ib_mr *c2_reg_phys_mr(struct ib_pd *ib_pd,
 	}
 
 	mr->pd = to_c2pd(ib_pd);
+	mr->umem = NULL;
 	pr_debug("%s - page shift %d, pbl_depth %d, total_len %u, "
 		"*iova_start %llx, first pa %llx, last pa %llx\n",
 		__FUNCTION__, page_shift, pbl_depth, total_len,
@@ -428,8 +430,8 @@ static struct ib_mr *c2_get_dma_mr(struct ib_pd *pd, int acc)
 	return c2_reg_phys_mr(pd, &bl, 1, acc, &kva);
 }
 
-static struct ib_mr *c2_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
-				    int acc, struct ib_udata *udata)
+static struct ib_mr *c2_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+				    u64 virt, int acc, struct ib_udata *udata)
 {
 	u64 *pages;
 	u64 kva = 0;
@@ -441,15 +443,23 @@ static struct ib_mr *c2_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 	struct c2_mr *c2mr;
 
 	pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
-	shift = ffs(region->page_size) - 1;
 
 	c2mr = kmalloc(sizeof(*c2mr), GFP_KERNEL);
 	if (!c2mr)
 		return ERR_PTR(-ENOMEM);
 	c2mr->pd = c2pd;
 
+	c2mr->umem = ib_umem_get(pd->uobject->context, start, length, acc);
+	if (IS_ERR(c2mr->umem)) {
+		err = PTR_ERR(c2mr->umem);
+		kfree(c2mr);
+		return ERR_PTR(err);
+	}
+
+	shift = ffs(c2mr->umem->page_size) - 1;
+
 	n = 0;
-	list_for_each_entry(chunk, &region->chunk_list, list)
+	list_for_each_entry(chunk, &c2mr->umem->chunk_list, list)
 		n += chunk->nents;
 
 	pages = kmalloc(n * sizeof(u64), GFP_KERNEL);
@@ -459,35 +469,34 @@ static struct ib_mr *c2_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 	}
 
 	i = 0;
-	list_for_each_entry(chunk, &region->chunk_list, list) {
+	list_for_each_entry(chunk, &c2mr->umem->chunk_list, list) {
 		for (j = 0; j < chunk->nmap; ++j) {
 			len = sg_dma_len(&chunk->page_list[j]) >> shift;
 			for (k = 0; k < len; ++k) {
 				pages[i++] =
 					sg_dma_address(&chunk->page_list[j]) +
-					(region->page_size * k);
+					(c2mr->umem->page_size * k);
 			}
 		}
 	}
 
-	kva = (u64)region->virt_base;
+	kva = virt;
   	err = c2_nsmr_register_phys_kern(to_c2dev(pd->device),
 					 pages,
- 					 region->page_size,
+					 c2mr->umem->page_size,
 					 i,
-					 region->length,
-					 region->offset,
+					 length,
+					 c2mr->umem->offset,
 					 &kva,
 					 c2_convert_access(acc),
 					 c2mr);
 	kfree(pages);
-	if (err) {
-		kfree(c2mr);
-		return ERR_PTR(err);
-	}
+	if (err)
+		goto err;
 	return &c2mr->ibmr;
 
 err:
+	ib_umem_release(c2mr->umem);
 	kfree(c2mr);
 	return ERR_PTR(err);
 }
@@ -502,8 +511,11 @@ static int c2_dereg_mr(struct ib_mr *ib_mr)
 	err = c2_stag_dealloc(to_c2dev(ib_mr->device), ib_mr->lkey);
 	if (err)
 		pr_debug("c2_stag_dealloc failed: %d\n", err);
-	else
+	else {
+		if (mr->umem)
+			ib_umem_release(mr->umem);
 		kfree(mr);
+	}
 
 	return err;
 }

drivers/infiniband/hw/amso1100/c2_provider.h

@@ -73,6 +73,7 @@ struct c2_pd {
 struct c2_mr {
 	struct ib_mr ibmr;
 	struct c2_pd *pd;
+	struct ib_umem *umem;
 };
 
 struct c2_av;

drivers/infiniband/hw/cxgb3/iwch_provider.c

@@ -47,6 +47,7 @@
 #include <rdma/iw_cm.h>
 #include <rdma/ib_verbs.h>
 #include <rdma/ib_smi.h>
+#include <rdma/ib_umem.h>
 #include <rdma/ib_user_verbs.h>
 
 #include "cxio_hal.h"
@@ -443,6 +444,8 @@ static int iwch_dereg_mr(struct ib_mr *ib_mr)
 	remove_handle(rhp, &rhp->mmidr, mmid);
 	if (mhp->kva)
 		kfree((void *) (unsigned long) mhp->kva);
+	if (mhp->umem)
+		ib_umem_release(mhp->umem);
 	PDBG("%s mmid 0x%x ptr %p\n", __FUNCTION__, mmid, mhp);
 	kfree(mhp);
 	return 0;
@@ -577,8 +580,8 @@ static int iwch_reregister_phys_mem(struct ib_mr *mr,
 }
 
 
-static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
-				      int acc, struct ib_udata *udata)
+static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+				      u64 virt, int acc, struct ib_udata *udata)
 {
 	__be64 *pages;
 	int shift, n, len;
@@ -591,7 +594,6 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 	struct iwch_reg_user_mr_resp uresp;
 
 	PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
-	shift = ffs(region->page_size) - 1;
 
 	php = to_iwch_pd(pd);
 	rhp = php->rhp;
@@ -599,8 +601,17 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 	if (!mhp)
 		return ERR_PTR(-ENOMEM);
 
+	mhp->umem = ib_umem_get(pd->uobject->context, start, length, acc);
+	if (IS_ERR(mhp->umem)) {
+		err = PTR_ERR(mhp->umem);
+		kfree(mhp);
+		return ERR_PTR(err);
+	}
+
+	shift = ffs(mhp->umem->page_size) - 1;
+
 	n = 0;
-	list_for_each_entry(chunk, &region->chunk_list, list)
+	list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
 		n += chunk->nents;
 
 	pages = kmalloc(n * sizeof(u64), GFP_KERNEL);
@@ -611,13 +622,13 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 
 	i = n = 0;
 
-	list_for_each_entry(chunk, &region->chunk_list, list)
+	list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
 		for (j = 0; j < chunk->nmap; ++j) {
 			len = sg_dma_len(&chunk->page_list[j]) >> shift;
 			for (k = 0; k < len; ++k) {
 				pages[i++] = cpu_to_be64(sg_dma_address(
 					&chunk->page_list[j]) +
-					region->page_size * k);
+					mhp->umem->page_size * k);
 			}
 		}
 
@@ -625,9 +636,9 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 	mhp->attr.pdid = php->pdid;
 	mhp->attr.zbva = 0;
 	mhp->attr.perms = iwch_ib_to_tpt_access(acc);
-	mhp->attr.va_fbo = region->virt_base;
+	mhp->attr.va_fbo = virt;
 	mhp->attr.page_size = shift - 12;
-	mhp->attr.len = (u32) region->length;
+	mhp->attr.len = (u32) length;
 	mhp->attr.pbl_size = i;
 	err = iwch_register_mem(rhp, php, mhp, shift, pages);
 	kfree(pages);
@@ -650,6 +661,7 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 	return &mhp->ibmr;
 
 err:
+	ib_umem_release(mhp->umem);
 	kfree(mhp);
 	return ERR_PTR(err);
 }

drivers/infiniband/hw/cxgb3/iwch_provider.h

@@ -73,6 +73,7 @@ struct tpt_attributes {
 
 struct iwch_mr {
 	struct ib_mr ibmr;
+	struct ib_umem *umem;
 	struct iwch_dev *rhp;
 	u64 kva;
 	struct tpt_attributes attr;

drivers/infiniband/hw/ehca/ehca_classes.h

@@ -176,6 +176,7 @@ struct ehca_mr {
 		struct ib_mr ib_mr;	/* must always be first in ehca_mr */
 		struct ib_fmr ib_fmr;	/* must always be first in ehca_mr */
 	} ib;
+	struct ib_umem *umem;
 	spinlock_t mrlock;
 
 	enum ehca_mr_flag flags;

drivers/infiniband/hw/ehca/ehca_iverbs.h

@@ -78,8 +78,7 @@ struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
 			       int num_phys_buf,
 			       int mr_access_flags, u64 *iova_start);
 
-struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd,
-			       struct ib_umem *region,
+struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, u64 virt,
 			       int mr_access_flags, struct ib_udata *udata);
 
 int ehca_rereg_phys_mr(struct ib_mr *mr,

drivers/infiniband/hw/ehca/ehca_mrmw.c

@@ -39,6 +39,8 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include <rdma/ib_umem.h>
+
 #include <asm/current.h>
 
 #include "ehca_iverbs.h"
@@ -238,10 +240,8 @@ struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
 
 /*----------------------------------------------------------------------*/
 
-struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd,
-			       struct ib_umem *region,
-			       int mr_access_flags,
-			       struct ib_udata *udata)
+struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, u64 virt,
+			       int mr_access_flags, struct ib_udata *udata)
 {
 	struct ib_mr *ib_mr;
 	struct ehca_mr *e_mr;
@@ -257,11 +257,7 @@ struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd,
 		ehca_gen_err("bad pd=%p", pd);
 		return ERR_PTR(-EFAULT);
 	}
-	if (!region) {
-		ehca_err(pd->device, "bad input values: region=%p", region);
-		ib_mr = ERR_PTR(-EINVAL);
-		goto reg_user_mr_exit0;
-	}
+
 	if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
 	     !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
 	    ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
@@ -275,17 +271,10 @@ struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd,
 		ib_mr = ERR_PTR(-EINVAL);
 		goto reg_user_mr_exit0;
 	}
-	if (region->page_size != PAGE_SIZE) {
-		ehca_err(pd->device, "page size not supported, "
-			 "region->page_size=%x", region->page_size);
-		ib_mr = ERR_PTR(-EINVAL);
-		goto reg_user_mr_exit0;
-	}
 
-	if ((region->length == 0) ||
-	    ((region->virt_base + region->length) < region->virt_base)) {
+	if (length == 0 || virt + length < virt) {
 		ehca_err(pd->device, "bad input values: length=%lx "
-			 "virt_base=%lx", region->length, region->virt_base);
+			 "virt_base=%lx", length, virt);
 		ib_mr = ERR_PTR(-EINVAL);
 		goto reg_user_mr_exit0;
 	}
@@ -297,40 +286,55 @@ struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd,
 		goto reg_user_mr_exit0;
 	}
 
+	e_mr->umem = ib_umem_get(pd->uobject->context, start, length,
+				 mr_access_flags);
+	if (IS_ERR(e_mr->umem)) {
+		ib_mr = (void *) e_mr->umem;
+		goto reg_user_mr_exit1;
+	}
+
+	if (e_mr->umem->page_size != PAGE_SIZE) {
+		ehca_err(pd->device, "page size not supported, "
+			 "e_mr->umem->page_size=%x", e_mr->umem->page_size);
+		ib_mr = ERR_PTR(-EINVAL);
+		goto reg_user_mr_exit2;
+	}
+
 	/* determine number of MR pages */
-	num_pages_mr = (((region->virt_base % PAGE_SIZE) + region->length +
-			 PAGE_SIZE - 1) / PAGE_SIZE);
-	num_pages_4k = (((region->virt_base % EHCA_PAGESIZE) + region->length +
-			 EHCA_PAGESIZE - 1) / EHCA_PAGESIZE);
+	num_pages_mr = (((virt % PAGE_SIZE) + length + PAGE_SIZE - 1) /
+			PAGE_SIZE);
+	num_pages_4k = (((virt % EHCA_PAGESIZE) + length + EHCA_PAGESIZE - 1) /
+			EHCA_PAGESIZE);
 
 	/* register MR on HCA */
 	pginfo.type       = EHCA_MR_PGI_USER;
 	pginfo.num_pages  = num_pages_mr;
 	pginfo.num_4k     = num_pages_4k;
-	pginfo.region     = region;
-	pginfo.next_4k	  = region->offset / EHCA_PAGESIZE;
+	pginfo.region     = e_mr->umem;
+	pginfo.next_4k	  = e_mr->umem->offset / EHCA_PAGESIZE;
 	pginfo.next_chunk = list_prepare_entry(pginfo.next_chunk,
-					       (&region->chunk_list),
+					       (&e_mr->umem->chunk_list),
 					       list);
 
-	ret = ehca_reg_mr(shca, e_mr, (u64*)region->virt_base,
-			  region->length, mr_access_flags, e_pd, &pginfo,
-			  &e_mr->ib.ib_mr.lkey, &e_mr->ib.ib_mr.rkey);
+	ret = ehca_reg_mr(shca, e_mr, (u64*) virt, length, mr_access_flags, e_pd,
+			  &pginfo, &e_mr->ib.ib_mr.lkey, &e_mr->ib.ib_mr.rkey);
 	if (ret) {
 		ib_mr = ERR_PTR(ret);
-		goto reg_user_mr_exit1;
+		goto reg_user_mr_exit2;
 	}
 
 	/* successful registration of all pages */
 	return &e_mr->ib.ib_mr;
 
+reg_user_mr_exit2:
+	ib_umem_release(e_mr->umem);
 reg_user_mr_exit1:
 	ehca_mr_delete(e_mr);
 reg_user_mr_exit0:
 	if (IS_ERR(ib_mr))
-		ehca_err(pd->device, "rc=%lx pd=%p region=%p mr_access_flags=%x"
+		ehca_err(pd->device, "rc=%lx pd=%p mr_access_flags=%x"
 			 " udata=%p",
-			 PTR_ERR(ib_mr), pd, region, mr_access_flags, udata);
+			 PTR_ERR(ib_mr), pd, mr_access_flags, udata);
 	return ib_mr;
 } /* end ehca_reg_user_mr() */
 
@@ -596,6 +600,9 @@ int ehca_dereg_mr(struct ib_mr *mr)
 		goto dereg_mr_exit0;
 	}
 
+	if (e_mr->umem)
+		ib_umem_release(e_mr->umem);
+
 	/* successful deregistration */
 	ehca_mr_delete(e_mr);
 

drivers/infiniband/hw/ipath/ipath_mr.c

@@ -31,6 +31,7 @@
  * SOFTWARE.
  */
 
+#include <rdma/ib_umem.h>
 #include <rdma/ib_pack.h>
 #include <rdma/ib_smi.h>
 
@@ -147,6 +148,7 @@ struct ib_mr *ipath_reg_phys_mr(struct ib_pd *pd,
 	mr->mr.offset = 0;
 	mr->mr.access_flags = acc;
 	mr->mr.max_segs = num_phys_buf;
+	mr->umem = NULL;
 
 	m = 0;
 	n = 0;
@@ -170,46 +172,56 @@ struct ib_mr *ipath_reg_phys_mr(struct ib_pd *pd,
 /**
  * ipath_reg_user_mr - register a userspace memory region
  * @pd: protection domain for this memory region
- * @region: the user memory region
+ * @start: starting userspace address
+ * @length: length of region to register
+ * @virt_addr: virtual address to use (from HCA's point of view)
  * @mr_access_flags: access flags for this memory region
  * @udata: unused by the InfiniPath driver
  *
  * Returns the memory region on success, otherwise returns an errno.
  */
-struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
-				int mr_access_flags, struct ib_udata *udata)
+struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+				u64 virt_addr, int mr_access_flags,
+				struct ib_udata *udata)
 {
 	struct ipath_mr *mr;
+	struct ib_umem *umem;
 	struct ib_umem_chunk *chunk;
 	int n, m, i;
 	struct ib_mr *ret;
 
-	if (region->length == 0) {
+	if (length == 0) {
 		ret = ERR_PTR(-EINVAL);
 		goto bail;
 	}
 
+	umem = ib_umem_get(pd->uobject->context, start, length, mr_access_flags);
+	if (IS_ERR(umem))
+		return (void *) umem;
+
 	n = 0;
-	list_for_each_entry(chunk, &region->chunk_list, list)
+	list_for_each_entry(chunk, &umem->chunk_list, list)
 		n += chunk->nents;
 
 	mr = alloc_mr(n, &to_idev(pd->device)->lk_table);
 	if (!mr) {
 		ret = ERR_PTR(-ENOMEM);
+		ib_umem_release(umem);
 		goto bail;
 	}
 
 	mr->mr.pd = pd;
-	mr->mr.user_base = region->user_base;
-	mr->mr.iova = region->virt_base;
-	mr->mr.length = region->length;
-	mr->mr.offset = region->offset;
+	mr->mr.user_base = start;
+	mr->mr.iova = virt_addr;
+	mr->mr.length = length;
+	mr->mr.offset = umem->offset;
 	mr->mr.access_flags = mr_access_flags;
 	mr->mr.max_segs = n;
+	mr->umem = umem;
 
 	m = 0;
 	n = 0;
-	list_for_each_entry(chunk, &region->chunk_list, list) {
+	list_for_each_entry(chunk, &umem->chunk_list, list) {
 		for (i = 0; i < chunk->nents; i++) {
 			void *vaddr;
 
@@ -219,7 +231,7 @@ struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 				goto bail;
 			}
 			mr->mr.map[m]->segs[n].vaddr = vaddr;
-			mr->mr.map[m]->segs[n].length = region->page_size;
+			mr->mr.map[m]->segs[n].length = umem->page_size;
 			n++;
 			if (n == IPATH_SEGSZ) {
 				m++;
@@ -253,6 +265,10 @@ int ipath_dereg_mr(struct ib_mr *ibmr)
 		i--;
 		kfree(mr->mr.map[i]);
 	}
+
+	if (mr->umem)
+		ib_umem_release(mr->umem);
+
 	kfree(mr);
 	return 0;
 }

drivers/infiniband/hw/ipath/ipath_verbs.h

@@ -251,6 +251,7 @@ struct ipath_sge {
 /* Memory region */
 struct ipath_mr {
 	struct ib_mr ibmr;
+	struct ib_umem *umem;
 	struct ipath_mregion mr;	/* must be last */
 };
 
@@ -751,8 +752,8 @@ struct ib_mr *ipath_reg_phys_mr(struct ib_pd *pd,
 				struct ib_phys_buf *buffer_list,
 				int num_phys_buf, int acc, u64 *iova_start);
 
-struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
-				int mr_access_flags,
+struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+				u64 virt_addr, int mr_access_flags,
 				struct ib_udata *udata);
 
 int ipath_dereg_mr(struct ib_mr *ibmr);

drivers/infiniband/hw/mlx4/Kconfig

+config MLX4_INFINIBAND
+	tristate "Mellanox ConnectX HCA support"
+	depends on INFINIBAND
+	select MLX4_CORE
+	---help---
+	  This driver provides low-level InfiniBand support for
+	  Mellanox ConnectX PCI Express host channel adapters (HCAs).
+	  This is required to use InfiniBand protocols such as
+	  IP-over-IB or SRP with these devices.

drivers/infiniband/hw/mlx4/Makefile

+obj-$(CONFIG_MLX4_INFINIBAND)	+= mlx4_ib.o
+
+mlx4_ib-y :=	ah.o cq.o doorbell.o mad.o main.o mr.o qp.o srq.o

drivers/infiniband/hw/mlx4/ah.c

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "mlx4_ib.h"
+
+struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
+{
+	struct mlx4_dev *dev = to_mdev(pd->device)->dev;
+	struct mlx4_ib_ah *ah;
+
+	ah = kmalloc(sizeof *ah, GFP_ATOMIC);
+	if (!ah)
+		return ERR_PTR(-ENOMEM);
+
+	memset(&ah->av, 0, sizeof ah->av);
+
+	ah->av.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
+	ah->av.g_slid  = ah_attr->src_path_bits;
+	ah->av.dlid    = cpu_to_be16(ah_attr->dlid);
+	if (ah_attr->static_rate) {
+		ah->av.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
+		while (ah->av.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
+		       !(1 << ah->av.stat_rate & dev->caps.stat_rate_support))
+			--ah->av.stat_rate;
+	}
+	ah->av.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
+	if (ah_attr->ah_flags & IB_AH_GRH) {
+		ah->av.g_slid   |= 0x80;
+		ah->av.gid_index = ah_attr->grh.sgid_index;
+		ah->av.hop_limit = ah_attr->grh.hop_limit;
+		ah->av.sl_tclass_flowlabel |=
+			cpu_to_be32((ah_attr->grh.traffic_class << 20) |
+				    ah_attr->grh.flow_label);
+		memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, 16);
+	}
+
+	return &ah->ibah;
+}
+
+int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
+{
+	struct mlx4_ib_ah *ah = to_mah(ibah);
+
+	memset(ah_attr, 0, sizeof *ah_attr);
+	ah_attr->dlid	       = be16_to_cpu(ah->av.dlid);
+	ah_attr->sl	       = be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28;
+	ah_attr->port_num      = be32_to_cpu(ah->av.port_pd) >> 24;
+	if (ah->av.stat_rate)
+		ah_attr->static_rate = ah->av.stat_rate - MLX4_STAT_RATE_OFFSET;
+	ah_attr->src_path_bits = ah->av.g_slid & 0x7F;
+
+	if (mlx4_ib_ah_grh_present(ah)) {
+		ah_attr->ah_flags = IB_AH_GRH;
+
+		ah_attr->grh.traffic_class =
+			be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20;
+		ah_attr->grh.flow_label =
+			be32_to_cpu(ah->av.sl_tclass_flowlabel) & 0xfffff;
+		ah_attr->grh.hop_limit  = ah->av.hop_limit;
+		ah_attr->grh.sgid_index = ah->av.gid_index;
+		memcpy(ah_attr->grh.dgid.raw, ah->av.dgid, 16);
+	}
+
+	return 0;
+}
+
+int mlx4_ib_destroy_ah(struct ib_ah *ah)
+{
+	kfree(to_mah(ah));
+	return 0;
+}

drivers/infiniband/hw/mlx4/cq.c

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/mlx4/cq.h>
+#include <linux/mlx4/qp.h>
+
+#include "mlx4_ib.h"
+#include "user.h"
+
+static void mlx4_ib_cq_comp(struct mlx4_cq *cq)
+{
+	struct ib_cq *ibcq = &to_mibcq(cq)->ibcq;
+	ibcq->comp_handler(ibcq, ibcq->cq_context);
+}
+
+static void mlx4_ib_cq_event(struct mlx4_cq *cq, enum mlx4_event type)
+{
+	struct ib_event event;
+	struct ib_cq *ibcq;
+
+	if (type != MLX4_EVENT_TYPE_CQ_ERROR) {
+		printk(KERN_WARNING "mlx4_ib: Unexpected event type %d "
+		       "on CQ %06x\n", type, cq->cqn);
+		return;
+	}
+
+	ibcq = &to_mibcq(cq)->ibcq;
+	if (ibcq->event_handler) {
+		event.device     = ibcq->device;
+		event.event      = IB_EVENT_CQ_ERR;
+		event.element.cq = ibcq;
+		ibcq->event_handler(&event, ibcq->cq_context);
+	}
+}
+
+static void *get_cqe_from_buf(struct mlx4_ib_cq_buf *buf, int n)
+{
+	int offset = n * sizeof (struct mlx4_cqe);
+
+	if (buf->buf.nbufs == 1)
+		return buf->buf.u.direct.buf + offset;
+	else
+		return buf->buf.u.page_list[offset >> PAGE_SHIFT].buf +
+			(offset & (PAGE_SIZE - 1));
+}
+
+static void *get_cqe(struct mlx4_ib_cq *cq, int n)
+{
+	return get_cqe_from_buf(&cq->buf, n);
+}
+
+static void *get_sw_cqe(struct mlx4_ib_cq *cq, int n)
+{
+	struct mlx4_cqe *cqe = get_cqe(cq, n & cq->ibcq.cqe);
+
+	return (!!(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK) ^
+		!!(n & (cq->ibcq.cqe + 1))) ? NULL : cqe;
+}
+
+static struct mlx4_cqe *next_cqe_sw(struct mlx4_ib_cq *cq)
+{
+	return get_sw_cqe(cq, cq->mcq.cons_index);
+}
+
+struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector,
+				struct ib_ucontext *context,
+				struct ib_udata *udata)
+{
+	struct mlx4_ib_dev *dev = to_mdev(ibdev);
+	struct mlx4_ib_cq *cq;
+	struct mlx4_uar *uar;
+	int buf_size;
+	int err;
+
+	if (entries < 1 || entries > dev->dev->caps.max_cqes)
+		return ERR_PTR(-EINVAL);
+
+	cq = kmalloc(sizeof *cq, GFP_KERNEL);
+	if (!cq)
+		return ERR_PTR(-ENOMEM);
+
+	entries      = roundup_pow_of_two(entries + 1);
+	cq->ibcq.cqe = entries - 1;
+	buf_size     = entries * sizeof (struct mlx4_cqe);
+	spin_lock_init(&cq->lock);
+
+	if (context) {
+		struct mlx4_ib_create_cq ucmd;
+
+		if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
+			err = -EFAULT;
+			goto err_cq;
+		}
+
+		cq->umem = ib_umem_get(context, ucmd.buf_addr, buf_size,
+				       IB_ACCESS_LOCAL_WRITE);
+		if (IS_ERR(cq->umem)) {
+			err = PTR_ERR(cq->umem);
+			goto err_cq;
+		}
+
+		err = mlx4_mtt_init(dev->dev, ib_umem_page_count(cq->umem),
+				    ilog2(cq->umem->page_size), &cq->buf.mtt);
+		if (err)
+			goto err_buf;
+
+		err = mlx4_ib_umem_write_mtt(dev, &cq->buf.mtt, cq->umem);
+		if (err)
+			goto err_mtt;
+
+		err = mlx4_ib_db_map_user(to_mucontext(context), ucmd.db_addr,
+					  &cq->db);
+		if (err)
+			goto err_mtt;
+
+		uar = &to_mucontext(context)->uar;
+	} else {
+		err = mlx4_ib_db_alloc(dev, &cq->db, 1);
+		if (err)
+			goto err_cq;
+
+		cq->mcq.set_ci_db  = cq->db.db;
+		cq->mcq.arm_db     = cq->db.db + 1;
+		*cq->mcq.set_ci_db = 0;
+		*cq->mcq.arm_db    = 0;
+
+		if (mlx4_buf_alloc(dev->dev, buf_size, PAGE_SIZE * 2, &cq->buf.buf)) {
+			err = -ENOMEM;
+			goto err_db;
+		}
+
+		err = mlx4_mtt_init(dev->dev, cq->buf.buf.npages, cq->buf.buf.page_shift,
+				    &cq->buf.mtt);
+		if (err)
+			goto err_buf;
+
+		err = mlx4_buf_write_mtt(dev->dev, &cq->buf.mtt, &cq->buf.buf);
+		if (err)
+			goto err_mtt;
+
+		uar = &dev->priv_uar;
+	}
+
+	err = mlx4_cq_alloc(dev->dev, entries, &cq->buf.mtt, uar,
+			    cq->db.dma, &cq->mcq);
+	if (err)
+		goto err_dbmap;
+
+	cq->mcq.comp  = mlx4_ib_cq_comp;
+	cq->mcq.event = mlx4_ib_cq_event;
+
+	if (context)
+		if (ib_copy_to_udata(udata, &cq->mcq.cqn, sizeof (__u32))) {
+			err = -EFAULT;
+			goto err_dbmap;
+		}
+
+	return &cq->ibcq;
+
+err_dbmap:
+	if (context)
+		mlx4_ib_db_unmap_user(to_mucontext(context), &cq->db);
+
+err_mtt:
+	mlx4_mtt_cleanup(dev->dev, &cq->buf.mtt);
+
+err_buf:
+	if (context)
+		ib_umem_release(cq->umem);
+	else
+		mlx4_buf_free(dev->dev, entries * sizeof (struct mlx4_cqe),
+			      &cq->buf.buf);
+
+err_db:
+	if (!context)
+		mlx4_ib_db_free(dev, &cq->db);
+
+err_cq:
+	kfree(cq);
+
+	return ERR_PTR(err);
+}
+
+int mlx4_ib_destroy_cq(struct ib_cq *cq)
+{
+	struct mlx4_ib_dev *dev = to_mdev(cq->device);
+	struct mlx4_ib_cq *mcq = to_mcq(cq);
+
+	mlx4_cq_free(dev->dev, &mcq->mcq);
+	mlx4_mtt_cleanup(dev->dev, &mcq->buf.mtt);
+
+	if (cq->uobject) {
+		mlx4_ib_db_unmap_user(to_mucontext(cq->uobject->context), &mcq->db);
+		ib_umem_release(mcq->umem);
+	} else {
+		mlx4_buf_free(dev->dev, (cq->cqe + 1) * sizeof (struct mlx4_cqe),
+			      &mcq->buf.buf);
+		mlx4_ib_db_free(dev, &mcq->db);
+	}
+
+	kfree(mcq);
+
+	return 0;
+}
+
+static void dump_cqe(void *cqe)
+{
+	__be32 *buf = cqe;
+
+	printk(KERN_DEBUG "CQE contents %08x %08x %08x %08x %08x %08x %08x %08x\n",
+	       be32_to_cpu(buf[0]), be32_to_cpu(buf[1]), be32_to_cpu(buf[2]),
+	       be32_to_cpu(buf[3]), be32_to_cpu(buf[4]), be32_to_cpu(buf[5]),
+	       be32_to_cpu(buf[6]), be32_to_cpu(buf[7]));
+}
+
+static void mlx4_ib_handle_error_cqe(struct mlx4_err_cqe *cqe,
+				     struct ib_wc *wc)
+{
+	if (cqe->syndrome == MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR) {
+		printk(KERN_DEBUG "local QP operation err "
+		       "(QPN %06x, WQE index %x, vendor syndrome %02x, "
+		       "opcode = %02x)\n",
+		       be32_to_cpu(cqe->my_qpn), be16_to_cpu(cqe->wqe_index),
+		       cqe->vendor_err_syndrome,
+		       cqe->owner_sr_opcode & ~MLX4_CQE_OWNER_MASK);
+		dump_cqe(cqe);
+	}
+
+	switch (cqe->syndrome) {
+	case MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR:
+		wc->status = IB_WC_LOC_LEN_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR:
+		wc->status = IB_WC_LOC_QP_OP_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_LOCAL_PROT_ERR:
+		wc->status = IB_WC_LOC_PROT_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_WR_FLUSH_ERR:
+		wc->status = IB_WC_WR_FLUSH_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_MW_BIND_ERR:
+		wc->status = IB_WC_MW_BIND_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_BAD_RESP_ERR:
+		wc->status = IB_WC_BAD_RESP_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR:
+		wc->status = IB_WC_LOC_ACCESS_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR:
+		wc->status = IB_WC_REM_INV_REQ_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR:
+		wc->status = IB_WC_REM_ACCESS_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_REMOTE_OP_ERR:
+		wc->status = IB_WC_REM_OP_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR:
+		wc->status = IB_WC_RETRY_EXC_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR:
+		wc->status = IB_WC_RNR_RETRY_EXC_ERR;
+		break;
+	case MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR:
+		wc->status = IB_WC_REM_ABORT_ERR;
+		break;
+	default:
+		wc->status = IB_WC_GENERAL_ERR;
+		break;
+	}
+
+	wc->vendor_err = cqe->vendor_err_syndrome;
+}
+
+static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
+			    struct mlx4_ib_qp **cur_qp,
+			    struct ib_wc *wc)
+{
+	struct mlx4_cqe *cqe;
+	struct mlx4_qp *mqp;
+	struct mlx4_ib_wq *wq;
+	struct mlx4_ib_srq *srq;
+	int is_send;
+	int is_error;
+	u16 wqe_ctr;
+
+	cqe = next_cqe_sw(cq);
+	if (!cqe)
+		return -EAGAIN;
+
+	++cq->mcq.cons_index;
+
+	/*
+	 * Make sure we read CQ entry contents after we've checked the
+	 * ownership bit.
+	 */
+	rmb();
+
+	is_send  = cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK;
+	is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
+		MLX4_CQE_OPCODE_ERROR;
+
+	if (!*cur_qp ||
+	    (be32_to_cpu(cqe->my_qpn) & 0xffffff) != (*cur_qp)->mqp.qpn) {
+		/*
+		 * We do not have to take the QP table lock here,
+		 * because CQs will be locked while QPs are removed
+		 * from the table.
+		 */
+		mqp = __mlx4_qp_lookup(to_mdev(cq->ibcq.device)->dev,
+				       be32_to_cpu(cqe->my_qpn));
+		if (unlikely(!mqp)) {
+			printk(KERN_WARNING "CQ %06x with entry for unknown QPN %06x\n",
+			       cq->mcq.cqn, be32_to_cpu(cqe->my_qpn) & 0xffffff);
+			return -EINVAL;
+		}
+
+		*cur_qp = to_mibqp(mqp);
+	}
+
+	wc->qp = &(*cur_qp)->ibqp;
+
+	if (is_send) {
+		wq = &(*cur_qp)->sq;
+		wqe_ctr = be16_to_cpu(cqe->wqe_index);
+		wq->tail += wqe_ctr - (u16) wq->tail;
+		wc->wr_id = wq->wrid[wq->tail & (wq->max - 1)];
+		++wq->tail;
+	} else if ((*cur_qp)->ibqp.srq) {
+		srq = to_msrq((*cur_qp)->ibqp.srq);
+		wqe_ctr = be16_to_cpu(cqe->wqe_index);
+		wc->wr_id = srq->wrid[wqe_ctr];
+		mlx4_ib_free_srq_wqe(srq, wqe_ctr);
+	} else {
+		wq	  = &(*cur_qp)->rq;
+		wc->wr_id = wq->wrid[wq->tail & (wq->max - 1)];
+		++wq->tail;
+	}
+
+	if (unlikely(is_error)) {
+		mlx4_ib_handle_error_cqe((struct mlx4_err_cqe *) cqe, wc);
+		return 0;
+	}
+
+	wc->status = IB_WC_SUCCESS;
+
+	if (is_send) {
+		wc->wc_flags = 0;
+		switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
+		case MLX4_OPCODE_RDMA_WRITE_IMM:
+			wc->wc_flags |= IB_WC_WITH_IMM;
+		case MLX4_OPCODE_RDMA_WRITE:
+			wc->opcode    = IB_WC_RDMA_WRITE;
+			break;
+		case MLX4_OPCODE_SEND_IMM:
+			wc->wc_flags |= IB_WC_WITH_IMM;
+		case MLX4_OPCODE_SEND:
+			wc->opcode    = IB_WC_SEND;
+			break;
+		case MLX4_OPCODE_RDMA_READ:
+			wc->opcode    = IB_WC_SEND;
+			wc->byte_len  = be32_to_cpu(cqe->byte_cnt);
+			break;
+		case MLX4_OPCODE_ATOMIC_CS:
+			wc->opcode    = IB_WC_COMP_SWAP;
+			wc->byte_len  = 8;
+			break;
+		case MLX4_OPCODE_ATOMIC_FA:
+			wc->opcode    = IB_WC_FETCH_ADD;
+			wc->byte_len  = 8;
+			break;
+		case MLX4_OPCODE_BIND_MW:
+			wc->opcode    = IB_WC_BIND_MW;
+			break;
+		}
+	} else {
+		wc->byte_len = be32_to_cpu(cqe->byte_cnt);
+
+		switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
+		case MLX4_RECV_OPCODE_RDMA_WRITE_IMM:
+			wc->opcode   = IB_WC_RECV_RDMA_WITH_IMM;
+			wc->wc_flags = IB_WC_WITH_IMM;
+			wc->imm_data = cqe->immed_rss_invalid;
+			break;
+		case MLX4_RECV_OPCODE_SEND:
+			wc->opcode   = IB_WC_RECV;
+			wc->wc_flags = 0;
+			break;
+		case MLX4_RECV_OPCODE_SEND_IMM:
+			wc->opcode   = IB_WC_RECV;
+			wc->wc_flags = IB_WC_WITH_IMM;
+			wc->imm_data = cqe->immed_rss_invalid;
+			break;
+		}
+
+		wc->slid	   = be16_to_cpu(cqe->rlid);
+		wc->sl		   = cqe->sl >> 4;
+		wc->src_qp	   = be32_to_cpu(cqe->g_mlpath_rqpn) & 0xffffff;
+		wc->dlid_path_bits = (be32_to_cpu(cqe->g_mlpath_rqpn) >> 24) & 0x7f;
+		wc->wc_flags      |= be32_to_cpu(cqe->g_mlpath_rqpn) & 0x80000000 ?
+			IB_WC_GRH : 0;
+		wc->pkey_index     = be32_to_cpu(cqe->immed_rss_invalid) >> 16;
+	}
+
+	return 0;
+}
+
+int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
+{
+	struct mlx4_ib_cq *cq = to_mcq(ibcq);
+	struct mlx4_ib_qp *cur_qp = NULL;
+	unsigned long flags;
+	int npolled;
+	int err = 0;
+
+	spin_lock_irqsave(&cq->lock, flags);
+
+	for (npolled = 0; npolled < num_entries; ++npolled) {
+		err = mlx4_ib_poll_one(cq, &cur_qp, wc + npolled);
+		if (err)
+			break;
+	}
+
+	if (npolled)
+		mlx4_cq_set_ci(&cq->mcq);
+
+	spin_unlock_irqrestore(&cq->lock, flags);
+
+	if (err == 0 || err == -EAGAIN)
+		return npolled;
+	else
+		return err;
+}
+
+int mlx4_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
+{
+	mlx4_cq_arm(&to_mcq(ibcq)->mcq,
+		    (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED ?
+		    MLX4_CQ_DB_REQ_NOT_SOL : MLX4_CQ_DB_REQ_NOT,
+		    to_mdev(ibcq->device)->uar_map,
+		    MLX4_GET_DOORBELL_LOCK(&to_mdev(ibcq->device)->uar_lock));
+
+	return 0;
+}
+
+void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
+{
+	u32 prod_index;
+	int nfreed = 0;
+	struct mlx4_cqe *cqe;
+
+	/*
+	 * First we need to find the current producer index, so we
+	 * know where to start cleaning from.  It doesn't matter if HW
+	 * adds new entries after this loop -- the QP we're worried
+	 * about is already in RESET, so the new entries won't come
+	 * from our QP and therefore don't need to be checked.
+	 */
+	for (prod_index = cq->mcq.cons_index; get_sw_cqe(cq, prod_index); ++prod_index)
+		if (prod_index == cq->mcq.cons_index + cq->ibcq.cqe)
+			break;
+
+	/*
+	 * Now sweep backwards through the CQ, removing CQ entries
+	 * that match our QP by copying older entries on top of them.
+	 */
+	while ((int) --prod_index - (int) cq->mcq.cons_index >= 0) {
+		cqe = get_cqe(cq, prod_index & cq->ibcq.cqe);
+		if ((be32_to_cpu(cqe->my_qpn) & 0xffffff) == qpn) {
+			if (srq && !(cqe->owner_sr_opcode & MLX4_CQE_IS_SEND_MASK))
+				mlx4_ib_free_srq_wqe(srq, be16_to_cpu(cqe->wqe_index));
+			++nfreed;
+		} else if (nfreed)
+			memcpy(get_cqe(cq, (prod_index + nfreed) & cq->ibcq.cqe),
+			       cqe, sizeof *cqe);
+	}
+
+	if (nfreed) {
+		cq->mcq.cons_index += nfreed;
+		/*
+		 * Make sure update of buffer contents is done before
+		 * updating consumer index.
+		 */
+		wmb();
+		mlx4_cq_set_ci(&cq->mcq);
+	}
+}
+
+void mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq)
+{
+	spin_lock_irq(&cq->lock);
+	__mlx4_ib_cq_clean(cq, qpn, srq);
+	spin_unlock_irq(&cq->lock);
+}

drivers/infiniband/hw/mlx4/doorbell.c

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/slab.h>
+
+#include "mlx4_ib.h"
+
+struct mlx4_ib_db_pgdir {
+	struct list_head	list;
+	DECLARE_BITMAP(order0, MLX4_IB_DB_PER_PAGE);
+	DECLARE_BITMAP(order1, MLX4_IB_DB_PER_PAGE / 2);
+	unsigned long	       *bits[2];
+	__be32		       *db_page;
+	dma_addr_t		db_dma;
+};
+
+static struct mlx4_ib_db_pgdir *mlx4_ib_alloc_db_pgdir(struct mlx4_ib_dev *dev)
+{
+	struct mlx4_ib_db_pgdir *pgdir;
+
+	pgdir = kzalloc(sizeof *pgdir, GFP_KERNEL);
+	if (!pgdir)
+		return NULL;
+
+	bitmap_fill(pgdir->order1, MLX4_IB_DB_PER_PAGE / 2);
+	pgdir->bits[0] = pgdir->order0;
+	pgdir->bits[1] = pgdir->order1;
+	pgdir->db_page = dma_alloc_coherent(dev->ib_dev.dma_device,
+					    PAGE_SIZE, &pgdir->db_dma,
+					    GFP_KERNEL);
+	if (!pgdir->db_page) {
+		kfree(pgdir);
+		return NULL;
+	}
+
+	return pgdir;
+}
+
+static int mlx4_ib_alloc_db_from_pgdir(struct mlx4_ib_db_pgdir *pgdir,
+				       struct mlx4_ib_db *db, int order)
+{
+	int o;
+	int i;
+
+	for (o = order; o <= 1; ++o) {
+		i = find_first_bit(pgdir->bits[o], MLX4_IB_DB_PER_PAGE >> o);
+		if (i < MLX4_IB_DB_PER_PAGE >> o)
+			goto found;
+	}
+
+	return -ENOMEM;
+
+found:
+	clear_bit(i, pgdir->bits[o]);
+
+	i <<= o;
+
+	if (o > order)
+		set_bit(i ^ 1, pgdir->bits[order]);
+
+	db->u.pgdir = pgdir;
+	db->index   = i;
+	db->db      = pgdir->db_page + db->index;
+	db->dma     = pgdir->db_dma  + db->index * 4;
+	db->order   = order;
+
+	return 0;
+}
+
+int mlx4_ib_db_alloc(struct mlx4_ib_dev *dev, struct mlx4_ib_db *db, int order)
+{
+	struct mlx4_ib_db_pgdir *pgdir;
+	int ret = 0;
+
+	mutex_lock(&dev->pgdir_mutex);
+
+	list_for_each_entry(pgdir, &dev->pgdir_list, list)
+		if (!mlx4_ib_alloc_db_from_pgdir(pgdir, db, order))
+			goto out;
+
+	pgdir = mlx4_ib_alloc_db_pgdir(dev);
+	if (!pgdir) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	list_add(&pgdir->list, &dev->pgdir_list);
+
+	/* This should never fail -- we just allocated an empty page: */
+	WARN_ON(mlx4_ib_alloc_db_from_pgdir(pgdir, db, order));
+
+out:
+	mutex_unlock(&dev->pgdir_mutex);
+
+	return ret;
+}
+
+void mlx4_ib_db_free(struct mlx4_ib_dev *dev, struct mlx4_ib_db *db)
+{
+	int o;
+	int i;
+
+	mutex_lock(&dev->pgdir_mutex);
+
+	o = db->order;
+	i = db->index;
+
+	if (db->order == 0 && test_bit(i ^ 1, db->u.pgdir->order0)) {
+		clear_bit(i ^ 1, db->u.pgdir->order0);
+		++o;
+	}
+
+	i >>= o;
+	set_bit(i, db->u.pgdir->bits[o]);
+
+	if (bitmap_full(db->u.pgdir->order1, MLX4_IB_DB_PER_PAGE / 2)) {
+		dma_free_coherent(dev->ib_dev.dma_device, PAGE_SIZE,
+				  db->u.pgdir->db_page, db->u.pgdir->db_dma);
+		list_del(&db->u.pgdir->list);
+		kfree(db->u.pgdir);
+	}
+
+	mutex_unlock(&dev->pgdir_mutex);
+}
+
+struct mlx4_ib_user_db_page {
+	struct list_head	list;
+	struct ib_umem	       *umem;
+	unsigned long		user_virt;
+	int			refcnt;
+};
+
+int mlx4_ib_db_map_user(struct mlx4_ib_ucontext *context, unsigned long virt,
+			struct mlx4_ib_db *db)
+{
+	struct mlx4_ib_user_db_page *page;
+	struct ib_umem_chunk *chunk;
+	int err = 0;
+
+	mutex_lock(&context->db_page_mutex);
+
+	list_for_each_entry(page, &context->db_page_list, list)
+		if (page->user_virt == (virt & PAGE_MASK))
+			goto found;
+
+	page = kmalloc(sizeof *page, GFP_KERNEL);
+	if (!page) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	page->user_virt = (virt & PAGE_MASK);
+	page->refcnt    = 0;
+	page->umem      = ib_umem_get(&context->ibucontext, virt & PAGE_MASK,
+				      PAGE_SIZE, 0);
+	if (IS_ERR(page->umem)) {
+		err = PTR_ERR(page->umem);
+		kfree(page);
+		goto out;
+	}
+
+	list_add(&page->list, &context->db_page_list);
+
+found:
+	chunk = list_entry(page->umem->chunk_list.next, struct ib_umem_chunk, list);
+	db->dma		= sg_dma_address(chunk->page_list) + (virt & ~PAGE_MASK);
+	db->u.user_page = page;
+	++page->refcnt;
+
+out:
+	mutex_unlock(&context->db_page_mutex);
+
+	return err;
+}
+
+void mlx4_ib_db_unmap_user(struct mlx4_ib_ucontext *context, struct mlx4_ib_db *db)
+{
+	mutex_lock(&context->db_page_mutex);
+
+	if (!--db->u.user_page->refcnt) {
+		list_del(&db->u.user_page->list);
+		ib_umem_release(db->u.user_page->umem);
+		kfree(db->u.user_page);
+	}
+
+	mutex_unlock(&context->db_page_mutex);
+}

drivers/infiniband/hw/mlx4/mad.c

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <rdma/ib_mad.h>
+#include <rdma/ib_smi.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4_ib.h"
+
+enum {
+	MLX4_IB_VENDOR_CLASS1 = 0x9,
+	MLX4_IB_VENDOR_CLASS2 = 0xa
+};
+
+int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey,
+		 int port, struct ib_wc *in_wc, struct ib_grh *in_grh,
+		 void *in_mad, void *response_mad)
+{
+	struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
+	void *inbox;
+	int err;
+	u32 in_modifier = port;
+	u8 op_modifier = 0;
+
+	inmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
+	if (IS_ERR(inmailbox))
+		return PTR_ERR(inmailbox);
+	inbox = inmailbox->buf;
+
+	outmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
+	if (IS_ERR(outmailbox)) {
+		mlx4_free_cmd_mailbox(dev->dev, inmailbox);
+		return PTR_ERR(outmailbox);
+	}
+
+	memcpy(inbox, in_mad, 256);
+
+	/*
+	 * Key check traps can't be generated unless we have in_wc to
+	 * tell us where to send the trap.
+	 */
+	if (ignore_mkey || !in_wc)
+		op_modifier |= 0x1;
+	if (ignore_bkey || !in_wc)
+		op_modifier |= 0x2;
+
+	if (in_wc) {
+		struct {
+			__be32		my_qpn;
+			u32		reserved1;
+			__be32		rqpn;
+			u8		sl;
+			u8		g_path;
+			u16		reserved2[2];
+			__be16		pkey;
+			u32		reserved3[11];
+			u8		grh[40];
+		} *ext_info;
+
+		memset(inbox + 256, 0, 256);
+		ext_info = inbox + 256;
+
+		ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num);
+		ext_info->rqpn   = cpu_to_be32(in_wc->src_qp);
+		ext_info->sl     = in_wc->sl << 4;
+		ext_info->g_path = in_wc->dlid_path_bits |
+			(in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
+		ext_info->pkey   = cpu_to_be16(in_wc->pkey_index);
+
+		if (in_grh)
+			memcpy(ext_info->grh, in_grh, 40);
+
+		op_modifier |= 0x4;
+
+		in_modifier |= in_wc->slid << 16;
+	}
+
+	err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma,
+			   in_modifier, op_modifier,
+			   MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
+
+	if (!err);
+		memcpy(response_mad, outmailbox->buf, 256);
+
+	mlx4_free_cmd_mailbox(dev->dev, inmailbox);
+	mlx4_free_cmd_mailbox(dev->dev, outmailbox);
+
+	return err;
+}
+
+static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl)
+{
+	struct ib_ah *new_ah;
+	struct ib_ah_attr ah_attr;
+
+	if (!dev->send_agent[port_num - 1][0])
+		return;
+
+	memset(&ah_attr, 0, sizeof ah_attr);
+	ah_attr.dlid     = lid;
+	ah_attr.sl       = sl;
+	ah_attr.port_num = port_num;
+
+	new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
+			      &ah_attr);
+	if (IS_ERR(new_ah))
+		return;
+
+	spin_lock(&dev->sm_lock);
+	if (dev->sm_ah[port_num - 1])
+		ib_destroy_ah(dev->sm_ah[port_num - 1]);
+	dev->sm_ah[port_num - 1] = new_ah;
+	spin_unlock(&dev->sm_lock);
+}
+
+/*
+ * Snoop SM MADs for port info and P_Key table sets, so we can
+ * synthesize LID change and P_Key change events.
+ */
+static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad)
+{
+	struct ib_event event;
+
+	if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
+	     mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
+	    mad->mad_hdr.method == IB_MGMT_METHOD_SET) {
+		if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
+			struct ib_port_info *pinfo =
+				(struct ib_port_info *) ((struct ib_smp *) mad)->data;
+
+			update_sm_ah(to_mdev(ibdev), port_num,
+				     be16_to_cpu(pinfo->sm_lid),
+				     pinfo->neighbormtu_mastersmsl & 0xf);
+
+			event.device	       = ibdev;
+			event.element.port_num = port_num;
+
+			if(pinfo->clientrereg_resv_subnetto & 0x80)
+				event.event    = IB_EVENT_CLIENT_REREGISTER;
+			else
+				event.event    = IB_EVENT_LID_CHANGE;
+
+			ib_dispatch_event(&event);
+		}
+
+		if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
+			event.device	       = ibdev;
+			event.event	       = IB_EVENT_PKEY_CHANGE;
+			event.element.port_num = port_num;
+			ib_dispatch_event(&event);
+		}
+	}
+}
+
+static void node_desc_override(struct ib_device *dev,
+			       struct ib_mad *mad)
+{
+	if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
+	     mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
+	    mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
+	    mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
+		spin_lock(&to_mdev(dev)->sm_lock);
+		memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
+		spin_unlock(&to_mdev(dev)->sm_lock);
+	}
+}
+
+static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad)
+{
+	int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
+	struct ib_mad_send_buf *send_buf;
+	struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
+	int ret;
+
+	if (agent) {
+		send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
+					      IB_MGMT_MAD_DATA, GFP_ATOMIC);
+		/*
+		 * We rely here on the fact that MLX QPs don't use the
+		 * address handle after the send is posted (this is
+		 * wrong following the IB spec strictly, but we know
+		 * it's OK for our devices).
+		 */
+		spin_lock(&dev->sm_lock);
+		memcpy(send_buf->mad, mad, sizeof *mad);
+		if ((send_buf->ah = dev->sm_ah[port_num - 1]))
+			ret = ib_post_send_mad(send_buf, NULL);
+		else
+			ret = -EINVAL;
+		spin_unlock(&dev->sm_lock);
+
+		if (ret)
+			ib_free_send_mad(send_buf);
+	}
+}
+
+int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags,	u8 port_num,
+			struct ib_wc *in_wc, struct ib_grh *in_grh,
+			struct ib_mad *in_mad, struct ib_mad *out_mad)
+{
+	u16 slid;
+	int err;
+
+	slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
+
+	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
+		forward_trap(to_mdev(ibdev), port_num, in_mad);
+		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
+	}
+
+	if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
+	    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
+		if (in_mad->mad_hdr.method   != IB_MGMT_METHOD_GET &&
+		    in_mad->mad_hdr.method   != IB_MGMT_METHOD_SET &&
+		    in_mad->mad_hdr.method   != IB_MGMT_METHOD_TRAP_REPRESS)
+			return IB_MAD_RESULT_SUCCESS;
+
+		/*
+		 * Don't process SMInfo queries or vendor-specific
+		 * MADs -- the SMA can't handle them.
+		 */
+		if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO ||
+		    ((in_mad->mad_hdr.attr_id & IB_SMP_ATTR_VENDOR_MASK) ==
+		     IB_SMP_ATTR_VENDOR_MASK))
+			return IB_MAD_RESULT_SUCCESS;
+	} else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
+		   in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1   ||
+		   in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2) {
+		if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
+		    in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
+			return IB_MAD_RESULT_SUCCESS;
+	} else
+		return IB_MAD_RESULT_SUCCESS;
+
+	err = mlx4_MAD_IFC(to_mdev(ibdev),
+			   mad_flags & IB_MAD_IGNORE_MKEY,
+			   mad_flags & IB_MAD_IGNORE_BKEY,
+			   port_num, in_wc, in_grh, in_mad, out_mad);
+	if (err)
+		return IB_MAD_RESULT_FAILURE;
+
+	if (!out_mad->mad_hdr.status) {
+		smp_snoop(ibdev, port_num, in_mad);
+		node_desc_override(ibdev, out_mad);
+	}
+
+	/* set return bit in status of directed route responses */
+	if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
+		out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
+
+	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
+		/* no response for trap repress */
+		return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
+
+	return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
+}
+
+static void send_handler(struct ib_mad_agent *agent,
+			 struct ib_mad_send_wc *mad_send_wc)
+{
+	ib_free_send_mad(mad_send_wc->send_buf);
+}
+
+int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
+{
+	struct ib_mad_agent *agent;
+	int p, q;
+	int ret;
+
+	for (p = 0; p < dev->dev->caps.num_ports; ++p)
+		for (q = 0; q <= 1; ++q) {
+			agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
+						      q ? IB_QPT_GSI : IB_QPT_SMI,
+						      NULL, 0, send_handler,
+						      NULL, NULL);
+			if (IS_ERR(agent)) {
+				ret = PTR_ERR(agent);
+				goto err;
+			}
+			dev->send_agent[p][q] = agent;
+		}
+
+	return 0;
+
+err:
+	for (p = 0; p < dev->dev->caps.num_ports; ++p)
+		for (q = 0; q <= 1; ++q)
+			if (dev->send_agent[p][q])
+				ib_unregister_mad_agent(dev->send_agent[p][q]);
+
+	return ret;
+}
+
+void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
+{
+	struct ib_mad_agent *agent;
+	int p, q;
+
+	for (p = 0; p < dev->dev->caps.num_ports; ++p) {
+		for (q = 0; q <= 1; ++q) {
+			agent = dev->send_agent[p][q];
+			dev->send_agent[p][q] = NULL;
+			ib_unregister_mad_agent(agent);
+		}
+
+		if (dev->sm_ah[p])
+			ib_destroy_ah(dev->sm_ah[p]);
+	}
+}

drivers/infiniband/hw/mlx4/main.c

+/*
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+
+#include <rdma/ib_smi.h>
+#include <rdma/ib_user_verbs.h>
+
+#include <linux/mlx4/driver.h>
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4_ib.h"
+#include "user.h"
+
+#define DRV_NAME	"mlx4_ib"
+#define DRV_VERSION	"0.01"
+#define DRV_RELDATE	"May 1, 2006"
+
+MODULE_AUTHOR("Roland Dreier");
+MODULE_DESCRIPTION("Mellanox ConnectX HCA InfiniBand driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(DRV_VERSION);
+
+static const char mlx4_ib_version[] __devinitdata =
+	DRV_NAME ": Mellanox ConnectX InfiniBand driver v"
+	DRV_VERSION " (" DRV_RELDATE ")\n";
+
+static void init_query_mad(struct ib_smp *mad)
+{
+	mad->base_version  = 1;
+	mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+	mad->class_version = 1;
+	mad->method	   = IB_MGMT_METHOD_GET;
+}
+
+static int mlx4_ib_query_device(struct ib_device *ibdev,
+				struct ib_device_attr *props)
+{
+	struct mlx4_ib_dev *dev = to_mdev(ibdev);
+	struct ib_smp *in_mad  = NULL;
+	struct ib_smp *out_mad = NULL;
+	int err = -ENOMEM;
+
+	in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
+	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+	if (!in_mad || !out_mad)
+		goto out;
+
+	init_query_mad(in_mad);
+	in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
+
+	err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, 1, NULL, NULL, in_mad, out_mad);
+	if (err)
+		goto out;
+
+	memset(props, 0, sizeof *props);
+
+	props->fw_ver = dev->dev->caps.fw_ver;
+	props->device_cap_flags    = IB_DEVICE_CHANGE_PHY_PORT |
+		IB_DEVICE_PORT_ACTIVE_EVENT		|
+		IB_DEVICE_SYS_IMAGE_GUID		|
+		IB_DEVICE_RC_RNR_NAK_GEN;
+	if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_PKEY_CNTR)
+		props->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR;
+	if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_QKEY_CNTR)
+		props->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR;
+	if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_APM)
+		props->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;
+	if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UD_AV_PORT)
+		props->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
+
+	props->vendor_id	   = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
+		0xffffff;
+	props->vendor_part_id	   = be16_to_cpup((__be16 *) (out_mad->data + 30));
+	props->hw_ver		   = be32_to_cpup((__be32 *) (out_mad->data + 32));
+	memcpy(&props->sys_image_guid, out_mad->data +	4, 8);
+
+	props->max_mr_size	   = ~0ull;
+	props->page_size_cap	   = dev->dev->caps.page_size_cap;
+	props->max_qp		   = dev->dev->caps.num_qps - dev->dev->caps.reserved_qps;
+	props->max_qp_wr	   = dev->dev->caps.max_wqes;
+	props->max_sge		   = min(dev->dev->caps.max_sq_sg,
+					 dev->dev->caps.max_rq_sg);
+	props->max_cq		   = dev->dev->caps.num_cqs - dev->dev->caps.reserved_cqs;
+	props->max_cqe		   = dev->dev->caps.max_cqes;
+	props->max_mr		   = dev->dev->caps.num_mpts - dev->dev->caps.reserved_mrws;
+	props->max_pd		   = dev->dev->caps.num_pds - dev->dev->caps.reserved_pds;
+	props->max_qp_rd_atom	   = dev->dev->caps.max_qp_dest_rdma;
+	props->max_qp_init_rd_atom = dev->dev->caps.max_qp_init_rdma;
+	props->max_res_rd_atom	   = props->max_qp_rd_atom * props->max_qp;
+	props->max_srq		   = dev->dev->caps.num_srqs - dev->dev->caps.reserved_srqs;
+	props->max_srq_wr	   = dev->dev->caps.max_srq_wqes;
+	props->max_srq_sge	   = dev->dev->caps.max_srq_sge;
+	props->local_ca_ack_delay  = dev->dev->caps.local_ca_ack_delay;
+	props->atomic_cap	   = dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_ATOMIC ?
+		IB_ATOMIC_HCA : IB_ATOMIC_NONE;
+	props->max_pkeys	   = dev->dev->caps.pkey_table_len;
+	props->max_mcast_grp	   = dev->dev->caps.num_mgms + dev->dev->caps.num_amgms;
+	props->max_mcast_qp_attach = dev->dev->caps.num_qp_per_mgm;
+	props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
+					   props->max_mcast_grp;
+	props->max_map_per_fmr = (1 << (32 - ilog2(dev->dev->caps.num_mpts))) - 1;
+
+out:
+	kfree(in_mad);
+	kfree(out_mad);
+
+	return err;
+}
+
+static int mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
+			      struct ib_port_attr *props)
+{
+	struct ib_smp *in_mad  = NULL;
+	struct ib_smp *out_mad = NULL;
+	int err = -ENOMEM;
+
+	in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
+	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+	if (!in_mad || !out_mad)
+		goto out;
+
+	memset(props, 0, sizeof *props);
+
+	init_query_mad(in_mad);
+	in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
+	in_mad->attr_mod = cpu_to_be32(port);
+
+	err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
+	if (err)
+		goto out;
+
+	props->lid		= be16_to_cpup((__be16 *) (out_mad->data + 16));
+	props->lmc		= out_mad->data[34] & 0x7;
+	props->sm_lid		= be16_to_cpup((__be16 *) (out_mad->data + 18));
+	props->sm_sl		= out_mad->data[36] & 0xf;
+	props->state		= out_mad->data[32] & 0xf;
+	props->phys_state	= out_mad->data[33] >> 4;
+	props->port_cap_flags	= be32_to_cpup((__be32 *) (out_mad->data + 20));
+	props->gid_tbl_len	= to_mdev(ibdev)->dev->caps.gid_table_len;
+	props->max_msg_sz	= 0x80000000;
+	props->pkey_tbl_len	= to_mdev(ibdev)->dev->caps.pkey_table_len;
+	props->bad_pkey_cntr	= be16_to_cpup((__be16 *) (out_mad->data + 46));
+	props->qkey_viol_cntr	= be16_to_cpup((__be16 *) (out_mad->data + 48));
+	props->active_width	= out_mad->data[31] & 0xf;
+	props->active_speed	= out_mad->data[35] >> 4;
+	props->max_mtu		= out_mad->data[41] & 0xf;
+	props->active_mtu	= out_mad->data[36] >> 4;
+	props->subnet_timeout	= out_mad->data[51] & 0x1f;
+	props->max_vl_num	= out_mad->data[37] >> 4;
+	props->init_type_reply	= out_mad->data[41] >> 4;
+
+out:
+	kfree(in_mad);
+	kfree(out_mad);
+
+	return err;
+}
+
+static int mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
+			     union ib_gid *gid)
+{
+	struct ib_smp *in_mad  = NULL;
+	struct ib_smp *out_mad = NULL;
+	int err = -ENOMEM;
+
+	in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
+	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+	if (!in_mad || !out_mad)
+		goto out;
+
+	init_query_mad(in_mad);
+	in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
+	in_mad->attr_mod = cpu_to_be32(port);
+
+	err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
+	if (err)
+		goto out;
+
+	memcpy(gid->raw, out_mad->data + 8, 8);
+
+	init_query_mad(in_mad);
+	in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
+	in_mad->attr_mod = cpu_to_be32(index / 8);
+
+	err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
+	if (err)
+		goto out;
+
+	memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
+
+out:
+	kfree(in_mad);
+	kfree(out_mad);
+	return err;
+}
+
+static int mlx4_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+			      u16 *pkey)
+{
+	struct ib_smp *in_mad  = NULL;
+	struct ib_smp *out_mad = NULL;
+	int err = -ENOMEM;
+
+	in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
+	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+	if (!in_mad || !out_mad)
+		goto out;
+
+	init_query_mad(in_mad);
+	in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
+	in_mad->attr_mod = cpu_to_be32(index / 32);
+
+	err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
+	if (err)
+		goto out;
+
+	*pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
+
+out:
+	kfree(in_mad);
+	kfree(out_mad);
+	return err;
+}
+
+static int mlx4_ib_modify_device(struct ib_device *ibdev, int mask,
+				 struct ib_device_modify *props)
+{
+	if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
+		return -EOPNOTSUPP;
+
+	if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
+		spin_lock(&to_mdev(ibdev)->sm_lock);
+		memcpy(ibdev->node_desc, props->node_desc, 64);
+		spin_unlock(&to_mdev(ibdev)->sm_lock);
+	}
+
+	return 0;
+}
+
+static int mlx4_SET_PORT(struct mlx4_ib_dev *dev, u8 port, int reset_qkey_viols,
+			 u32 cap_mask)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+	int err;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+
+	memset(mailbox->buf, 0, 256);
+	*(u8 *) mailbox->buf	     = !!reset_qkey_viols << 6;
+	((__be32 *) mailbox->buf)[2] = cpu_to_be32(cap_mask);
+
+	err = mlx4_cmd(dev->dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
+		       MLX4_CMD_TIME_CLASS_B);
+
+	mlx4_free_cmd_mailbox(dev->dev, mailbox);
+	return err;
+}
+
+static int mlx4_ib_modify_port(struct ib_device *ibdev, u8 port, int mask,
+			       struct ib_port_modify *props)
+{
+	struct ib_port_attr attr;
+	u32 cap_mask;
+	int err;
+
+	mutex_lock(&to_mdev(ibdev)->cap_mask_mutex);
+
+	err = mlx4_ib_query_port(ibdev, port, &attr);
+	if (err)
+		goto out;
+
+	cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
+		~props->clr_port_cap_mask;
+
+	err = mlx4_SET_PORT(to_mdev(ibdev), port,
+			    !!(mask & IB_PORT_RESET_QKEY_CNTR),
+			    cap_mask);
+
+out:
+	mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
+	return err;
+}
+
+static struct ib_ucontext *mlx4_ib_alloc_ucontext(struct ib_device *ibdev,
+						  struct ib_udata *udata)
+{
+	struct mlx4_ib_dev *dev = to_mdev(ibdev);
+	struct mlx4_ib_ucontext *context;
+	struct mlx4_ib_alloc_ucontext_resp resp;
+	int err;
+
+	resp.qp_tab_size      = dev->dev->caps.num_qps;
+	resp.bf_reg_size      = dev->dev->caps.bf_reg_size;
+	resp.bf_regs_per_page = dev->dev->caps.bf_regs_per_page;
+
+	context = kmalloc(sizeof *context, GFP_KERNEL);
+	if (!context)
+		return ERR_PTR(-ENOMEM);
+
+	err = mlx4_uar_alloc(to_mdev(ibdev)->dev, &context->uar);
+	if (err) {
+		kfree(context);
+		return ERR_PTR(err);
+	}
+
+	INIT_LIST_HEAD(&context->db_page_list);
+	mutex_init(&context->db_page_mutex);
+
+	err = ib_copy_to_udata(udata, &resp, sizeof resp);
+	if (err) {
+		mlx4_uar_free(to_mdev(ibdev)->dev, &context->uar);
+		kfree(context);
+		return ERR_PTR(-EFAULT);
+	}
+
+	return &context->ibucontext;
+}
+
+static int mlx4_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
+{
+	struct mlx4_ib_ucontext *context = to_mucontext(ibcontext);
+
+	mlx4_uar_free(to_mdev(ibcontext->device)->dev, &context->uar);
+	kfree(context);
+
+	return 0;
+}
+
+static int mlx4_ib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
+{
+	struct mlx4_ib_dev *dev = to_mdev(context->device);
+
+	if (vma->vm_end - vma->vm_start != PAGE_SIZE)
+		return -EINVAL;
+
+	if (vma->vm_pgoff == 0) {
+		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+		if (io_remap_pfn_range(vma, vma->vm_start,
+				       to_mucontext(context)->uar.pfn,
+				       PAGE_SIZE, vma->vm_page_prot))
+			return -EAGAIN;
+	} else if (vma->vm_pgoff == 1 && dev->dev->caps.bf_reg_size != 0) {
+		/* FIXME want pgprot_writecombine() for BlueFlame pages */
+		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+		if (io_remap_pfn_range(vma, vma->vm_start,
+				       to_mucontext(context)->uar.pfn +
+				       dev->dev->caps.num_uars,
+				       PAGE_SIZE, vma->vm_page_prot))
+			return -EAGAIN;
+	} else
+		return -EINVAL;
+
+	return 0;
+}
+
+static struct ib_pd *mlx4_ib_alloc_pd(struct ib_device *ibdev,
+				      struct ib_ucontext *context,
+				      struct ib_udata *udata)
+{
+	struct mlx4_ib_pd *pd;
+	int err;
+
+	pd = kmalloc(sizeof *pd, GFP_KERNEL);
+	if (!pd)
+		return ERR_PTR(-ENOMEM);
+
+	err = mlx4_pd_alloc(to_mdev(ibdev)->dev, &pd->pdn);
+	if (err) {
+		kfree(pd);
+		return ERR_PTR(err);
+	}
+
+	if (context)
+		if (ib_copy_to_udata(udata, &pd->pdn, sizeof (__u32))) {
+			mlx4_pd_free(to_mdev(ibdev)->dev, pd->pdn);
+			kfree(pd);
+			return ERR_PTR(-EFAULT);
+		}
+
+	return &pd->ibpd;
+}
+
+static int mlx4_ib_dealloc_pd(struct ib_pd *pd)
+{
+	mlx4_pd_free(to_mdev(pd->device)->dev, to_mpd(pd)->pdn);
+	kfree(pd);
+
+	return 0;
+}
+
+static int mlx4_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+	return mlx4_multicast_attach(to_mdev(ibqp->device)->dev,
+				     &to_mqp(ibqp)->mqp, gid->raw);
+}
+
+static int mlx4_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+	return mlx4_multicast_detach(to_mdev(ibqp->device)->dev,
+				     &to_mqp(ibqp)->mqp, gid->raw);
+}
+
+static int init_node_data(struct mlx4_ib_dev *dev)
+{
+	struct ib_smp *in_mad  = NULL;
+	struct ib_smp *out_mad = NULL;
+	int err = -ENOMEM;
+
+	in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
+	out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+	if (!in_mad || !out_mad)
+		goto out;
+
+	init_query_mad(in_mad);
+	in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
+
+	err = mlx4_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
+	if (err)
+		goto out;
+
+	memcpy(dev->ib_dev.node_desc, out_mad->data, 64);
+
+	in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
+
+	err = mlx4_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
+	if (err)
+		goto out;
+
+	memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
+
+out:
+	kfree(in_mad);
+	kfree(out_mad);
+	return err;
+}
+
+static void *mlx4_ib_add(struct mlx4_dev *dev)
+{
+	struct mlx4_ib_dev *ibdev;
+
+	ibdev = (struct mlx4_ib_dev *) ib_alloc_device(sizeof *ibdev);
+	if (!ibdev) {
+		dev_err(&dev->pdev->dev, "Device struct alloc failed\n");
+		return NULL;
+	}
+
+	if (mlx4_pd_alloc(dev, &ibdev->priv_pdn))
+		goto err_dealloc;
+
+	if (mlx4_uar_alloc(dev, &ibdev->priv_uar))
+		goto err_pd;
+
+	ibdev->uar_map = ioremap(ibdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
+	if (!ibdev->uar_map)
+		goto err_uar;
+
+	INIT_LIST_HEAD(&ibdev->pgdir_list);
+	mutex_init(&ibdev->pgdir_mutex);
+
+	ibdev->dev = dev;
+
+	strlcpy(ibdev->ib_dev.name, "mlx4_%d", IB_DEVICE_NAME_MAX);
+	ibdev->ib_dev.owner		= THIS_MODULE;
+	ibdev->ib_dev.node_type		= RDMA_NODE_IB_CA;
+	ibdev->ib_dev.phys_port_cnt	= dev->caps.num_ports;
+	ibdev->ib_dev.num_comp_vectors	= 1;
+	ibdev->ib_dev.dma_device	= &dev->pdev->dev;
+
+	ibdev->ib_dev.uverbs_abi_ver	= MLX4_IB_UVERBS_ABI_VERSION;
+	ibdev->ib_dev.uverbs_cmd_mask	=
+		(1ull << IB_USER_VERBS_CMD_GET_CONTEXT)		|
+		(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)	|
+		(1ull << IB_USER_VERBS_CMD_QUERY_PORT)		|
+		(1ull << IB_USER_VERBS_CMD_ALLOC_PD)		|
+		(1ull << IB_USER_VERBS_CMD_DEALLOC_PD)		|
+		(1ull << IB_USER_VERBS_CMD_REG_MR)		|
+		(1ull << IB_USER_VERBS_CMD_DEREG_MR)		|
+		(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL)	|
+		(1ull << IB_USER_VERBS_CMD_CREATE_CQ)		|
+		(1ull << IB_USER_VERBS_CMD_DESTROY_CQ)		|
+		(1ull << IB_USER_VERBS_CMD_CREATE_QP)		|
+		(1ull << IB_USER_VERBS_CMD_MODIFY_QP)		|
+		(1ull << IB_USER_VERBS_CMD_DESTROY_QP)		|
+		(1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)	|
+		(1ull << IB_USER_VERBS_CMD_DETACH_MCAST)	|
+		(1ull << IB_USER_VERBS_CMD_CREATE_SRQ)		|
+		(1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)		|
+		(1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
+
+	ibdev->ib_dev.query_device	= mlx4_ib_query_device;
+	ibdev->ib_dev.query_port	= mlx4_ib_query_port;
+	ibdev->ib_dev.query_gid		= mlx4_ib_query_gid;
+	ibdev->ib_dev.query_pkey	= mlx4_ib_query_pkey;
+	ibdev->ib_dev.modify_device	= mlx4_ib_modify_device;
+	ibdev->ib_dev.modify_port	= mlx4_ib_modify_port;
+	ibdev->ib_dev.alloc_ucontext	= mlx4_ib_alloc_ucontext;
+	ibdev->ib_dev.dealloc_ucontext	= mlx4_ib_dealloc_ucontext;
+	ibdev->ib_dev.mmap		= mlx4_ib_mmap;
+	ibdev->ib_dev.alloc_pd		= mlx4_ib_alloc_pd;
+	ibdev->ib_dev.dealloc_pd	= mlx4_ib_dealloc_pd;
+	ibdev->ib_dev.create_ah		= mlx4_ib_create_ah;
+	ibdev->ib_dev.query_ah		= mlx4_ib_query_ah;
+	ibdev->ib_dev.destroy_ah	= mlx4_ib_destroy_ah;
+	ibdev->ib_dev.create_srq	= mlx4_ib_create_srq;
+	ibdev->ib_dev.modify_srq	= mlx4_ib_modify_srq;
+	ibdev->ib_dev.destroy_srq	= mlx4_ib_destroy_srq;
+	ibdev->ib_dev.post_srq_recv	= mlx4_ib_post_srq_recv;
+	ibdev->ib_dev.create_qp		= mlx4_ib_create_qp;
+	ibdev->ib_dev.modify_qp		= mlx4_ib_modify_qp;
+	ibdev->ib_dev.destroy_qp	= mlx4_ib_destroy_qp;
+	ibdev->ib_dev.post_send		= mlx4_ib_post_send;
+	ibdev->ib_dev.post_recv		= mlx4_ib_post_recv;
+	ibdev->ib_dev.create_cq		= mlx4_ib_create_cq;
+	ibdev->ib_dev.destroy_cq	= mlx4_ib_destroy_cq;
+	ibdev->ib_dev.poll_cq		= mlx4_ib_poll_cq;
+	ibdev->ib_dev.req_notify_cq	= mlx4_ib_arm_cq;
+	ibdev->ib_dev.get_dma_mr	= mlx4_ib_get_dma_mr;
+	ibdev->ib_dev.reg_user_mr	= mlx4_ib_reg_user_mr;
+	ibdev->ib_dev.dereg_mr		= mlx4_ib_dereg_mr;
+	ibdev->ib_dev.attach_mcast	= mlx4_ib_mcg_attach;
+	ibdev->ib_dev.detach_mcast	= mlx4_ib_mcg_detach;
+	ibdev->ib_dev.process_mad	= mlx4_ib_process_mad;
+
+	if (init_node_data(ibdev))
+		goto err_map;
+
+	spin_lock_init(&ibdev->sm_lock);
+	mutex_init(&ibdev->cap_mask_mutex);
+
+	if (ib_register_device(&ibdev->ib_dev))
+		goto err_map;
+
+	if (mlx4_ib_mad_init(ibdev))
+		goto err_reg;
+
+	return ibdev;
+
+err_reg:
+	ib_unregister_device(&ibdev->ib_dev);
+
+err_map:
+	iounmap(ibdev->uar_map);
+
+err_uar:
+	mlx4_uar_free(dev, &ibdev->priv_uar);
+
+err_pd:
+	mlx4_pd_free(dev, ibdev->priv_pdn);
+
+err_dealloc:
+	ib_dealloc_device(&ibdev->ib_dev);
+
+	return NULL;
+}
+
+static void mlx4_ib_remove(struct mlx4_dev *dev, void *ibdev_ptr)
+{
+	struct mlx4_ib_dev *ibdev = ibdev_ptr;
+	int p;
+
+	for (p = 1; p <= dev->caps.num_ports; ++p)
+		mlx4_CLOSE_PORT(dev, p);
+
+	mlx4_ib_mad_cleanup(ibdev);
+	ib_unregister_device(&ibdev->ib_dev);
+	iounmap(ibdev->uar_map);
+	mlx4_uar_free(dev, &ibdev->priv_uar);
+	mlx4_pd_free(dev, ibdev->priv_pdn);
+	ib_dealloc_device(&ibdev->ib_dev);
+}
+
+static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
+			  enum mlx4_dev_event event, int subtype,
+			  int port)
+{
+	struct ib_event ibev;
+
+	switch (event) {
+	case MLX4_EVENT_TYPE_PORT_CHANGE:
+		ibev.event = subtype == MLX4_PORT_CHANGE_SUBTYPE_ACTIVE ?
+			IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
+		break;
+
+	case MLX4_EVENT_TYPE_LOCAL_CATAS_ERROR:
+		ibev.event = IB_EVENT_DEVICE_FATAL;
+		break;
+
+	default:
+		return;
+	}
+
+	ibev.device	      = ibdev_ptr;
+	ibev.element.port_num = port;
+
+	ib_dispatch_event(&ibev);
+}
+
+static struct mlx4_interface mlx4_ib_interface = {
+	.add	= mlx4_ib_add,
+	.remove	= mlx4_ib_remove,
+	.event	= mlx4_ib_event
+};
+
+static int __init mlx4_ib_init(void)
+{
+	return mlx4_register_interface(&mlx4_ib_interface);
+}
+
+static void __exit mlx4_ib_cleanup(void)
+{
+	mlx4_unregister_interface(&mlx4_ib_interface);
+}
+
+module_init(mlx4_ib_init);
+module_exit(mlx4_ib_cleanup);

drivers/infiniband/hw/mlx4/mlx4_ib.h

+/*
+ * Copyright (c) 2006, 2007 Cisco Systems.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_IB_H
+#define MLX4_IB_H
+
+#include <linux/compiler.h>
+#include <linux/list.h>
+
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_umem.h>
+
+#include <linux/mlx4/device.h>
+#include <linux/mlx4/doorbell.h>
+
+enum {
+	MLX4_IB_DB_PER_PAGE	= PAGE_SIZE / 4
+};
+
+struct mlx4_ib_db_pgdir;
+struct mlx4_ib_user_db_page;
+
+struct mlx4_ib_db {
+	__be32		       *db;
+	union {
+		struct mlx4_ib_db_pgdir	       *pgdir;
+		struct mlx4_ib_user_db_page    *user_page;
+	}			u;
+	dma_addr_t		dma;
+	int			index;
+	int			order;
+};
+
+struct mlx4_ib_ucontext {
+	struct ib_ucontext	ibucontext;
+	struct mlx4_uar		uar;
+	struct list_head	db_page_list;
+	struct mutex		db_page_mutex;
+};
+
+struct mlx4_ib_pd {
+	struct ib_pd		ibpd;
+	u32			pdn;
+};
+
+struct mlx4_ib_cq_buf {
+	struct mlx4_buf		buf;
+	struct mlx4_mtt		mtt;
+};
+
+struct mlx4_ib_cq {
+	struct ib_cq		ibcq;
+	struct mlx4_cq		mcq;
+	struct mlx4_ib_cq_buf	buf;
+	struct mlx4_ib_db	db;
+	spinlock_t		lock;
+	struct ib_umem	       *umem;
+};
+
+struct mlx4_ib_mr {
+	struct ib_mr		ibmr;
+	struct mlx4_mr		mmr;
+	struct ib_umem	       *umem;
+};
+
+struct mlx4_ib_wq {
+	u64		       *wrid;
+	spinlock_t		lock;
+	int			max;
+	int			max_gs;
+	int			offset;
+	int			wqe_shift;
+	unsigned		head;
+	unsigned		tail;
+};
+
+struct mlx4_ib_qp {
+	struct ib_qp		ibqp;
+	struct mlx4_qp		mqp;
+	struct mlx4_buf		buf;
+
+	struct mlx4_ib_db	db;
+	struct mlx4_ib_wq	rq;
+
+	u32			doorbell_qpn;
+	__be32			sq_signal_bits;
+	struct mlx4_ib_wq	sq;
+
+	struct ib_umem	       *umem;
+	struct mlx4_mtt		mtt;
+	int			buf_size;
+	struct mutex		mutex;
+	u8			port;
+	u8			alt_port;
+	u8			atomic_rd_en;
+	u8			resp_depth;
+	u8			state;
+};
+
+struct mlx4_ib_srq {
+	struct ib_srq		ibsrq;
+	struct mlx4_srq		msrq;
+	struct mlx4_buf		buf;
+	struct mlx4_ib_db	db;
+	u64		       *wrid;
+	spinlock_t		lock;
+	int			head;
+	int			tail;
+	u16			wqe_ctr;
+	struct ib_umem	       *umem;
+	struct mlx4_mtt		mtt;
+	struct mutex		mutex;
+};
+
+struct mlx4_ib_ah {
+	struct ib_ah		ibah;
+	struct mlx4_av		av;
+};
+
+struct mlx4_ib_dev {
+	struct ib_device	ib_dev;
+	struct mlx4_dev	       *dev;
+	void __iomem	       *uar_map;
+
+	struct list_head	pgdir_list;
+	struct mutex		pgdir_mutex;
+
+	struct mlx4_uar		priv_uar;
+	u32			priv_pdn;
+	MLX4_DECLARE_DOORBELL_LOCK(uar_lock);
+
+	struct ib_mad_agent    *send_agent[MLX4_MAX_PORTS][2];
+	struct ib_ah	       *sm_ah[MLX4_MAX_PORTS];
+	spinlock_t		sm_lock;
+
+	struct mutex		cap_mask_mutex;
+};
+
+static inline struct mlx4_ib_dev *to_mdev(struct ib_device *ibdev)
+{
+	return container_of(ibdev, struct mlx4_ib_dev, ib_dev);
+}
+
+static inline struct mlx4_ib_ucontext *to_mucontext(struct ib_ucontext *ibucontext)
+{
+	return container_of(ibucontext, struct mlx4_ib_ucontext, ibucontext);
+}
+
+static inline struct mlx4_ib_pd *to_mpd(struct ib_pd *ibpd)
+{
+	return container_of(ibpd, struct mlx4_ib_pd, ibpd);
+}
+
+static inline struct mlx4_ib_cq *to_mcq(struct ib_cq *ibcq)
+{
+	return container_of(ibcq, struct mlx4_ib_cq, ibcq);
+}
+
+static inline struct mlx4_ib_cq *to_mibcq(struct mlx4_cq *mcq)
+{
+	return container_of(mcq, struct mlx4_ib_cq, mcq);
+}
+
+static inline struct mlx4_ib_mr *to_mmr(struct ib_mr *ibmr)
+{
+	return container_of(ibmr, struct mlx4_ib_mr, ibmr);
+}
+
+static inline struct mlx4_ib_qp *to_mqp(struct ib_qp *ibqp)
+{
+	return container_of(ibqp, struct mlx4_ib_qp, ibqp);
+}
+
+static inline struct mlx4_ib_qp *to_mibqp(struct mlx4_qp *mqp)
+{
+	return container_of(mqp, struct mlx4_ib_qp, mqp);
+}
+
+static inline struct mlx4_ib_srq *to_msrq(struct ib_srq *ibsrq)
+{
+	return container_of(ibsrq, struct mlx4_ib_srq, ibsrq);
+}
+
+static inline struct mlx4_ib_srq *to_mibsrq(struct mlx4_srq *msrq)
+{
+	return container_of(msrq, struct mlx4_ib_srq, msrq);
+}
+
+static inline struct mlx4_ib_ah *to_mah(struct ib_ah *ibah)
+{
+	return container_of(ibah, struct mlx4_ib_ah, ibah);
+}
+
+int mlx4_ib_db_alloc(struct mlx4_ib_dev *dev, struct mlx4_ib_db *db, int order);
+void mlx4_ib_db_free(struct mlx4_ib_dev *dev, struct mlx4_ib_db *db);
+int mlx4_ib_db_map_user(struct mlx4_ib_ucontext *context, unsigned long virt,
+			struct mlx4_ib_db *db);
+void mlx4_ib_db_unmap_user(struct mlx4_ib_ucontext *context, struct mlx4_ib_db *db);
+
+struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc);
+int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
+			   struct ib_umem *umem);
+struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+				  u64 virt_addr, int access_flags,
+				  struct ib_udata *udata);
+int mlx4_ib_dereg_mr(struct ib_mr *mr);
+
+struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector,
+				struct ib_ucontext *context,
+				struct ib_udata *udata);
+int mlx4_ib_destroy_cq(struct ib_cq *cq);
+int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
+int mlx4_ib_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
+void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq);
+void mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq);
+
+struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
+int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr);
+int mlx4_ib_destroy_ah(struct ib_ah *ah);
+
+struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
+				  struct ib_srq_init_attr *init_attr,
+				  struct ib_udata *udata);
+int mlx4_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
+		       enum ib_srq_attr_mask attr_mask, struct ib_udata *udata);
+int mlx4_ib_destroy_srq(struct ib_srq *srq);
+void mlx4_ib_free_srq_wqe(struct mlx4_ib_srq *srq, int wqe_index);
+int mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+			  struct ib_recv_wr **bad_wr);
+
+struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
+				struct ib_qp_init_attr *init_attr,
+				struct ib_udata *udata);
+int mlx4_ib_destroy_qp(struct ib_qp *qp);
+int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+		      int attr_mask, struct ib_udata *udata);
+int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+		      struct ib_send_wr **bad_wr);
+int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+		      struct ib_recv_wr **bad_wr);
+
+int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey,
+		 int port, struct ib_wc *in_wc, struct ib_grh *in_grh,
+		 void *in_mad, void *response_mad);
+int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags,	u8 port_num,
+			struct ib_wc *in_wc, struct ib_grh *in_grh,
+			struct ib_mad *in_mad, struct ib_mad *out_mad);
+int mlx4_ib_mad_init(struct mlx4_ib_dev *dev);
+void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev);
+
+static inline int mlx4_ib_ah_grh_present(struct mlx4_ib_ah *ah)
+{
+	return !!(ah->av.g_slid & 0x80);
+}
+
+#endif /* MLX4_IB_H */

drivers/infiniband/hw/mlx4/mr.c

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "mlx4_ib.h"
+
+static u32 convert_access(int acc)
+{
+	return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC       : 0) |
+	       (acc & IB_ACCESS_REMOTE_WRITE  ? MLX4_PERM_REMOTE_WRITE : 0) |
+	       (acc & IB_ACCESS_REMOTE_READ   ? MLX4_PERM_REMOTE_READ  : 0) |
+	       (acc & IB_ACCESS_LOCAL_WRITE   ? MLX4_PERM_LOCAL_WRITE  : 0) |
+	       MLX4_PERM_LOCAL_READ;
+}
+
+struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
+{
+	struct mlx4_ib_mr *mr;
+	int err;
+
+	mr = kmalloc(sizeof *mr, GFP_KERNEL);
+	if (!mr)
+		return ERR_PTR(-ENOMEM);
+
+	err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
+			    ~0ull, convert_access(acc), 0, 0, &mr->mmr);
+	if (err)
+		goto err_free;
+
+	err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
+	if (err)
+		goto err_mr;
+
+	mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
+	mr->umem = NULL;
+
+	return &mr->ibmr;
+
+err_mr:
+	mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
+
+err_free:
+	kfree(mr);
+
+	return ERR_PTR(err);
+}
+
+int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
+			   struct ib_umem *umem)
+{
+	u64 *pages;
+	struct ib_umem_chunk *chunk;
+	int i, j, k;
+	int n;
+	int len;
+	int err = 0;
+
+	pages = (u64 *) __get_free_page(GFP_KERNEL);
+	if (!pages)
+		return -ENOMEM;
+
+	i = n = 0;
+
+	list_for_each_entry(chunk, &umem->chunk_list, list)
+		for (j = 0; j < chunk->nmap; ++j) {
+			len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
+			for (k = 0; k < len; ++k) {
+				pages[i++] = sg_dma_address(&chunk->page_list[j]) +
+					umem->page_size * k;
+				/*
+				 * Be friendly to WRITE_MTT firmware
+				 * command, and pass it chunks of
+				 * appropriate size.
+				 */
+				if (i == PAGE_SIZE / sizeof (u64) - 2) {
+					err = mlx4_write_mtt(dev->dev, mtt, n,
+							     i, pages);
+					if (err)
+						goto out;
+					n += i;
+					i = 0;
+				}
+			}
+		}
+
+	if (i)
+		err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
+
+out:
+	free_page((unsigned long) pages);
+	return err;
+}
+
+struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+				  u64 virt_addr, int access_flags,
+				  struct ib_udata *udata)
+{
+	struct mlx4_ib_dev *dev = to_mdev(pd->device);
+	struct mlx4_ib_mr *mr;
+	int shift;
+	int err;
+	int n;
+
+	mr = kmalloc(sizeof *mr, GFP_KERNEL);
+	if (!mr)
+		return ERR_PTR(-ENOMEM);
+
+	mr->umem = ib_umem_get(pd->uobject->context, start, length, access_flags);
+	if (IS_ERR(mr->umem)) {
+		err = PTR_ERR(mr->umem);
+		goto err_free;
+	}
+
+	n = ib_umem_page_count(mr->umem);
+	shift = ilog2(mr->umem->page_size);
+
+	err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
+			    convert_access(access_flags), n, shift, &mr->mmr);
+	if (err)
+		goto err_umem;
+
+	err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
+	if (err)
+		goto err_mr;
+
+	err = mlx4_mr_enable(dev->dev, &mr->mmr);
+	if (err)
+		goto err_mr;
+
+	mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
+
+	return &mr->ibmr;
+
+err_mr:
+	mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
+
+err_umem:
+	ib_umem_release(mr->umem);
+
+err_free:
+	kfree(mr);
+
+	return ERR_PTR(err);
+}
+
+int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
+{
+	struct mlx4_ib_mr *mr = to_mmr(ibmr);
+
+	mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
+	if (mr->umem)
+		ib_umem_release(mr->umem);
+	kfree(mr);
+
+	return 0;
+}

drivers/infiniband/hw/mlx4/qp.c

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <rdma/ib_cache.h>
+#include <rdma/ib_pack.h>
+
+#include <linux/mlx4/qp.h>
+
+#include "mlx4_ib.h"
+#include "user.h"
+
+enum {
+	MLX4_IB_ACK_REQ_FREQ	= 8,
+};
+
+enum {
+	MLX4_IB_DEFAULT_SCHED_QUEUE	= 0x83,
+	MLX4_IB_DEFAULT_QP0_SCHED_QUEUE	= 0x3f
+};
+
+enum {
+	/*
+	 * Largest possible UD header: send with GRH and immediate data.
+	 */
+	MLX4_IB_UD_HEADER_SIZE		= 72
+};
+
+struct mlx4_ib_sqp {
+	struct mlx4_ib_qp	qp;
+	int			pkey_index;
+	u32			qkey;
+	u32			send_psn;
+	struct ib_ud_header	ud_header;
+	u8			header_buf[MLX4_IB_UD_HEADER_SIZE];
+};
+
+static const __be32 mlx4_ib_opcode[] = {
+	[IB_WR_SEND]			= __constant_cpu_to_be32(MLX4_OPCODE_SEND),
+	[IB_WR_SEND_WITH_IMM]		= __constant_cpu_to_be32(MLX4_OPCODE_SEND_IMM),
+	[IB_WR_RDMA_WRITE]		= __constant_cpu_to_be32(MLX4_OPCODE_RDMA_WRITE),
+	[IB_WR_RDMA_WRITE_WITH_IMM]	= __constant_cpu_to_be32(MLX4_OPCODE_RDMA_WRITE_IMM),
+	[IB_WR_RDMA_READ]		= __constant_cpu_to_be32(MLX4_OPCODE_RDMA_READ),
+	[IB_WR_ATOMIC_CMP_AND_SWP]	= __constant_cpu_to_be32(MLX4_OPCODE_ATOMIC_CS),
+	[IB_WR_ATOMIC_FETCH_AND_ADD]	= __constant_cpu_to_be32(MLX4_OPCODE_ATOMIC_FA),
+};
+
+static struct mlx4_ib_sqp *to_msqp(struct mlx4_ib_qp *mqp)
+{
+	return container_of(mqp, struct mlx4_ib_sqp, qp);
+}
+
+static int is_sqp(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
+{
+	return qp->mqp.qpn >= dev->dev->caps.sqp_start &&
+		qp->mqp.qpn <= dev->dev->caps.sqp_start + 3;
+}
+
+static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
+{
+	return qp->mqp.qpn >= dev->dev->caps.sqp_start &&
+		qp->mqp.qpn <= dev->dev->caps.sqp_start + 1;
+}
+
+static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
+{
+	if (qp->buf.nbufs == 1)
+		return qp->buf.u.direct.buf + offset;
+	else
+		return qp->buf.u.page_list[offset >> PAGE_SHIFT].buf +
+			(offset & (PAGE_SIZE - 1));
+}
+
+static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
+{
+	return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift));
+}
+
+static void *get_send_wqe(struct mlx4_ib_qp *qp, int n)
+{
+	return get_wqe(qp, qp->sq.offset + (n << qp->sq.wqe_shift));
+}
+
+static void mlx4_ib_qp_event(struct mlx4_qp *qp, enum mlx4_event type)
+{
+	struct ib_event event;
+	struct ib_qp *ibqp = &to_mibqp(qp)->ibqp;
+
+	if (type == MLX4_EVENT_TYPE_PATH_MIG)
+		to_mibqp(qp)->port = to_mibqp(qp)->alt_port;
+
+	if (ibqp->event_handler) {
+		event.device     = ibqp->device;
+		event.element.qp = ibqp;
+		switch (type) {
+		case MLX4_EVENT_TYPE_PATH_MIG:
+			event.event = IB_EVENT_PATH_MIG;
+			break;
+		case MLX4_EVENT_TYPE_COMM_EST:
+			event.event = IB_EVENT_COMM_EST;
+			break;
+		case MLX4_EVENT_TYPE_SQ_DRAINED:
+			event.event = IB_EVENT_SQ_DRAINED;
+			break;
+		case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
+			event.event = IB_EVENT_QP_LAST_WQE_REACHED;
+			break;
+		case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
+			event.event = IB_EVENT_QP_FATAL;
+			break;
+		case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
+			event.event = IB_EVENT_PATH_MIG_ERR;
+			break;
+		case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
+			event.event = IB_EVENT_QP_REQ_ERR;
+			break;
+		case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
+			event.event = IB_EVENT_QP_ACCESS_ERR;
+			break;
+		default:
+			printk(KERN_WARNING "mlx4_ib: Unexpected event type %d "
+			       "on QP %06x\n", type, qp->qpn);
+			return;
+		}
+
+		ibqp->event_handler(&event, ibqp->qp_context);
+	}
+}
+
+static int send_wqe_overhead(enum ib_qp_type type)
+{
+	/*
+	 * UD WQEs must have a datagram segment.
+	 * RC and UC WQEs might have a remote address segment.
+	 * MLX WQEs need two extra inline data segments (for the UD
+	 * header and space for the ICRC).
+	 */
+	switch (type) {
+	case IB_QPT_UD:
+		return sizeof (struct mlx4_wqe_ctrl_seg) +
+			sizeof (struct mlx4_wqe_datagram_seg);
+	case IB_QPT_UC:
+		return sizeof (struct mlx4_wqe_ctrl_seg) +
+			sizeof (struct mlx4_wqe_raddr_seg);
+	case IB_QPT_RC:
+		return sizeof (struct mlx4_wqe_ctrl_seg) +
+			sizeof (struct mlx4_wqe_atomic_seg) +
+			sizeof (struct mlx4_wqe_raddr_seg);
+	case IB_QPT_SMI:
+	case IB_QPT_GSI:
+		return sizeof (struct mlx4_wqe_ctrl_seg) +
+			ALIGN(MLX4_IB_UD_HEADER_SIZE +
+			      sizeof (struct mlx4_wqe_inline_seg),
+			      sizeof (struct mlx4_wqe_data_seg)) +
+			ALIGN(4 +
+			      sizeof (struct mlx4_wqe_inline_seg),
+			      sizeof (struct mlx4_wqe_data_seg));
+	default:
+		return sizeof (struct mlx4_wqe_ctrl_seg);
+	}
+}
+
+static int set_qp_size(struct mlx4_ib_dev *dev, struct ib_qp_cap *cap,
+		       enum ib_qp_type type, struct mlx4_ib_qp *qp)
+{
+	/* Sanity check QP size before proceeding */
+	if (cap->max_send_wr	 > dev->dev->caps.max_wqes  ||
+	    cap->max_recv_wr	 > dev->dev->caps.max_wqes  ||
+	    cap->max_send_sge	 > dev->dev->caps.max_sq_sg ||
+	    cap->max_recv_sge	 > dev->dev->caps.max_rq_sg ||
+	    cap->max_inline_data + send_wqe_overhead(type) +
+	    sizeof (struct mlx4_wqe_inline_seg) > dev->dev->caps.max_sq_desc_sz)
+		return -EINVAL;
+
+	/*
+	 * For MLX transport we need 2 extra S/G entries:
+	 * one for the header and one for the checksum at the end
+	 */
+	if ((type == IB_QPT_SMI || type == IB_QPT_GSI) &&
+	    cap->max_send_sge + 2 > dev->dev->caps.max_sq_sg)
+		return -EINVAL;
+
+	qp->rq.max = cap->max_recv_wr ? roundup_pow_of_two(cap->max_recv_wr) : 0;
+	qp->sq.max = cap->max_send_wr ? roundup_pow_of_two(cap->max_send_wr) : 0;
+
+	qp->rq.wqe_shift = ilog2(roundup_pow_of_two(cap->max_recv_sge *
+						    sizeof (struct mlx4_wqe_data_seg)));
+	qp->rq.max_gs    = (1 << qp->rq.wqe_shift) / sizeof (struct mlx4_wqe_data_seg);
+
+	qp->sq.wqe_shift = ilog2(roundup_pow_of_two(max(cap->max_send_sge *
+							sizeof (struct mlx4_wqe_data_seg),
+							cap->max_inline_data +
+							sizeof (struct mlx4_wqe_inline_seg)) +
+						    send_wqe_overhead(type)));
+	qp->sq.max_gs    = ((1 << qp->sq.wqe_shift) - send_wqe_overhead(type)) /
+		sizeof (struct mlx4_wqe_data_seg);
+
+	qp->buf_size = (qp->rq.max << qp->rq.wqe_shift) +
+		(qp->sq.max << qp->sq.wqe_shift);
+	if (qp->rq.wqe_shift > qp->sq.wqe_shift) {
+		qp->rq.offset = 0;
+		qp->sq.offset = qp->rq.max << qp->rq.wqe_shift;
+	} else {
+		qp->rq.offset = qp->sq.max << qp->sq.wqe_shift;
+		qp->sq.offset = 0;
+	}
+
+	cap->max_send_wr  = qp->sq.max;
+	cap->max_recv_wr  = qp->rq.max;
+	cap->max_send_sge = qp->sq.max_gs;
+	cap->max_recv_sge = qp->rq.max_gs;
+	cap->max_inline_data = (1 << qp->sq.wqe_shift) - send_wqe_overhead(type) -
+		sizeof (struct mlx4_wqe_inline_seg);
+
+	return 0;
+}
+
+static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
+			    struct ib_qp_init_attr *init_attr,
+			    struct ib_udata *udata, int sqpn, struct mlx4_ib_qp *qp)
+{
+	struct mlx4_wqe_ctrl_seg *ctrl;
+	int err;
+	int i;
+
+	mutex_init(&qp->mutex);
+	spin_lock_init(&qp->sq.lock);
+	spin_lock_init(&qp->rq.lock);
+
+	qp->state	 = IB_QPS_RESET;
+	qp->atomic_rd_en = 0;
+	qp->resp_depth   = 0;
+
+	qp->rq.head	    = 0;
+	qp->rq.tail	    = 0;
+	qp->sq.head	    = 0;
+	qp->sq.tail	    = 0;
+
+	err = set_qp_size(dev, &init_attr->cap, init_attr->qp_type, qp);
+	if (err)
+		goto err;
+
+	if (pd->uobject) {
+		struct mlx4_ib_create_qp ucmd;
+
+		if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
+			err = -EFAULT;
+			goto err;
+		}
+
+		qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
+				       qp->buf_size, 0);
+		if (IS_ERR(qp->umem)) {
+			err = PTR_ERR(qp->umem);
+			goto err;
+		}
+
+		err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
+				    ilog2(qp->umem->page_size), &qp->mtt);
+		if (err)
+			goto err_buf;
+
+		err = mlx4_ib_umem_write_mtt(dev, &qp->mtt, qp->umem);
+		if (err)
+			goto err_mtt;
+
+		err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
+					  ucmd.db_addr, &qp->db);
+		if (err)
+			goto err_mtt;
+	} else {
+		err = mlx4_ib_db_alloc(dev, &qp->db, 0);
+		if (err)
+			goto err;
+
+		*qp->db.db = 0;
+
+		if (mlx4_buf_alloc(dev->dev, qp->buf_size, PAGE_SIZE * 2, &qp->buf)) {
+			err = -ENOMEM;
+			goto err_db;
+		}
+
+		err = mlx4_mtt_init(dev->dev, qp->buf.npages, qp->buf.page_shift,
+				    &qp->mtt);
+		if (err)
+			goto err_buf;
+
+		err = mlx4_buf_write_mtt(dev->dev, &qp->mtt, &qp->buf);
+		if (err)
+			goto err_mtt;
+
+		for (i = 0; i < qp->sq.max; ++i) {
+			ctrl = get_send_wqe(qp, i);
+			ctrl->owner_opcode = cpu_to_be32(1 << 31);
+		}
+
+		qp->sq.wrid  = kmalloc(qp->sq.max * sizeof (u64), GFP_KERNEL);
+		qp->rq.wrid  = kmalloc(qp->rq.max * sizeof (u64), GFP_KERNEL);
+
+		if (!qp->sq.wrid || !qp->rq.wrid) {
+			err = -ENOMEM;
+			goto err_wrid;
+		}
+
+		/* We don't support inline sends for kernel QPs (yet) */
+		init_attr->cap.max_inline_data = 0;
+	}
+
+	err = mlx4_qp_alloc(dev->dev, sqpn, &qp->mqp);
+	if (err)
+		goto err_wrid;
+
+	/*
+	 * Hardware wants QPN written in big-endian order (after
+	 * shifting) for send doorbell.  Precompute this value to save
+	 * a little bit when posting sends.
+	 */
+	qp->doorbell_qpn = swab32(qp->mqp.qpn << 8);
+
+	if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
+		qp->sq_signal_bits = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
+	else
+		qp->sq_signal_bits = 0;
+
+	qp->mqp.event = mlx4_ib_qp_event;
+
+	return 0;
+
+err_wrid:
+	if (pd->uobject)
+		mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
+	else {
+		kfree(qp->sq.wrid);
+		kfree(qp->rq.wrid);
+	}
+
+err_mtt:
+	mlx4_mtt_cleanup(dev->dev, &qp->mtt);
+
+err_buf:
+	if (pd->uobject)
+		ib_umem_release(qp->umem);
+	else
+		mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
+
+err_db:
+	if (!pd->uobject)
+		mlx4_ib_db_free(dev, &qp->db);
+
+err:
+	return err;
+}
+
+static enum mlx4_qp_state to_mlx4_state(enum ib_qp_state state)
+{
+	switch (state) {
+	case IB_QPS_RESET:	return MLX4_QP_STATE_RST;
+	case IB_QPS_INIT:	return MLX4_QP_STATE_INIT;
+	case IB_QPS_RTR:	return MLX4_QP_STATE_RTR;
+	case IB_QPS_RTS:	return MLX4_QP_STATE_RTS;
+	case IB_QPS_SQD:	return MLX4_QP_STATE_SQD;
+	case IB_QPS_SQE:	return MLX4_QP_STATE_SQER;
+	case IB_QPS_ERR:	return MLX4_QP_STATE_ERR;
+	default:		return -1;
+	}
+}
+
+static void mlx4_ib_lock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
+{
+	if (send_cq == recv_cq)
+		spin_lock_irq(&send_cq->lock);
+	else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
+		spin_lock_irq(&send_cq->lock);
+		spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING);
+	} else {
+		spin_lock_irq(&recv_cq->lock);
+		spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING);
+	}
+}
+
+static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *recv_cq)
+{
+	if (send_cq == recv_cq)
+		spin_unlock_irq(&send_cq->lock);
+	else if (send_cq->mcq.cqn < recv_cq->mcq.cqn) {
+		spin_unlock(&recv_cq->lock);
+		spin_unlock_irq(&send_cq->lock);
+	} else {
+		spin_unlock(&send_cq->lock);
+		spin_unlock_irq(&recv_cq->lock);
+	}
+}
+
+static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
+			      int is_user)
+{
+	struct mlx4_ib_cq *send_cq, *recv_cq;
+
+	if (qp->state != IB_QPS_RESET)
+		if (mlx4_qp_modify(dev->dev, NULL, to_mlx4_state(qp->state),
+				   MLX4_QP_STATE_RST, NULL, 0, 0, &qp->mqp))
+			printk(KERN_WARNING "mlx4_ib: modify QP %06x to RESET failed.\n",
+			       qp->mqp.qpn);
+
+	send_cq = to_mcq(qp->ibqp.send_cq);
+	recv_cq = to_mcq(qp->ibqp.recv_cq);
+
+	mlx4_ib_lock_cqs(send_cq, recv_cq);
+
+	if (!is_user) {
+		__mlx4_ib_cq_clean(recv_cq, qp->mqp.qpn,
+				 qp->ibqp.srq ? to_msrq(qp->ibqp.srq): NULL);
+		if (send_cq != recv_cq)
+			__mlx4_ib_cq_clean(send_cq, qp->mqp.qpn, NULL);
+	}
+
+	mlx4_qp_remove(dev->dev, &qp->mqp);
+
+	mlx4_ib_unlock_cqs(send_cq, recv_cq);
+
+	mlx4_qp_free(dev->dev, &qp->mqp);
+	mlx4_mtt_cleanup(dev->dev, &qp->mtt);
+
+	if (is_user) {
+		mlx4_ib_db_unmap_user(to_mucontext(qp->ibqp.uobject->context),
+				      &qp->db);
+		ib_umem_release(qp->umem);
+	} else {
+		kfree(qp->sq.wrid);
+		kfree(qp->rq.wrid);
+		mlx4_buf_free(dev->dev, qp->buf_size, &qp->buf);
+		mlx4_ib_db_free(dev, &qp->db);
+	}
+}
+
+struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
+				struct ib_qp_init_attr *init_attr,
+				struct ib_udata *udata)
+{
+	struct mlx4_ib_dev *dev = to_mdev(pd->device);
+	struct mlx4_ib_sqp *sqp;
+	struct mlx4_ib_qp *qp;
+	int err;
+
+	switch (init_attr->qp_type) {
+	case IB_QPT_RC:
+	case IB_QPT_UC:
+	case IB_QPT_UD:
+	{
+		qp = kmalloc(sizeof *qp, GFP_KERNEL);
+		if (!qp)
+			return ERR_PTR(-ENOMEM);
+
+		err = create_qp_common(dev, pd, init_attr, udata, 0, qp);
+		if (err) {
+			kfree(qp);
+			return ERR_PTR(err);
+		}
+
+		qp->ibqp.qp_num = qp->mqp.qpn;
+
+		break;
+	}
+	case IB_QPT_SMI:
+	case IB_QPT_GSI:
+	{
+		/* Userspace is not allowed to create special QPs: */
+		if (pd->uobject)
+			return ERR_PTR(-EINVAL);
+
+		sqp = kmalloc(sizeof *sqp, GFP_KERNEL);
+		if (!sqp)
+			return ERR_PTR(-ENOMEM);
+
+		qp = &sqp->qp;
+
+		err = create_qp_common(dev, pd, init_attr, udata,
+				       dev->dev->caps.sqp_start +
+				       (init_attr->qp_type == IB_QPT_SMI ? 0 : 2) +
+				       init_attr->port_num - 1,
+				       qp);
+		if (err) {
+			kfree(sqp);
+			return ERR_PTR(err);
+		}
+
+		qp->port	= init_attr->port_num;
+		qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
+
+		break;
+	}
+	default:
+		/* Don't support raw QPs */
+		return ERR_PTR(-EINVAL);
+	}
+
+	return &qp->ibqp;
+}
+
+int mlx4_ib_destroy_qp(struct ib_qp *qp)
+{
+	struct mlx4_ib_dev *dev = to_mdev(qp->device);
+	struct mlx4_ib_qp *mqp = to_mqp(qp);
+
+	if (is_qp0(dev, mqp))
+		mlx4_CLOSE_PORT(dev->dev, mqp->port);
+
+	destroy_qp_common(dev, mqp, !!qp->pd->uobject);
+
+	if (is_sqp(dev, mqp))
+		kfree(to_msqp(mqp));
+	else
+		kfree(mqp);
+
+	return 0;
+}
+
+static void init_port(struct mlx4_ib_dev *dev, int port)
+{
+	struct mlx4_init_port_param param;
+	int err;
+
+	memset(&param, 0, sizeof param);
+
+	param.port_width_cap = dev->dev->caps.port_width_cap;
+	param.vl_cap	     = dev->dev->caps.vl_cap;
+	param.mtu	     = ib_mtu_enum_to_int(dev->dev->caps.mtu_cap);
+	param.max_gid	     = dev->dev->caps.gid_table_len;
+	param.max_pkey	     = dev->dev->caps.pkey_table_len;
+
+	err = mlx4_INIT_PORT(dev->dev, &param, port);
+	if (err)
+		printk(KERN_WARNING "INIT_PORT failed, return code %d.\n", err);
+}
+
+static int to_mlx4_st(enum ib_qp_type type)
+{
+	switch (type) {
+	case IB_QPT_RC:		return MLX4_QP_ST_RC;
+	case IB_QPT_UC:		return MLX4_QP_ST_UC;
+	case IB_QPT_UD:		return MLX4_QP_ST_UD;
+	case IB_QPT_SMI:
+	case IB_QPT_GSI:	return MLX4_QP_ST_MLX;
+	default:		return -1;
+	}
+}
+
+static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, struct ib_qp_attr *attr,
+				   int attr_mask)
+{
+	u8 dest_rd_atomic;
+	u32 access_flags;
+	u32 hw_access_flags = 0;
+
+	if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
+		dest_rd_atomic = attr->max_dest_rd_atomic;
+	else
+		dest_rd_atomic = qp->resp_depth;
+
+	if (attr_mask & IB_QP_ACCESS_FLAGS)
+		access_flags = attr->qp_access_flags;
+	else
+		access_flags = qp->atomic_rd_en;
+
+	if (!dest_rd_atomic)
+		access_flags &= IB_ACCESS_REMOTE_WRITE;
+
+	if (access_flags & IB_ACCESS_REMOTE_READ)
+		hw_access_flags |= MLX4_QP_BIT_RRE;
+	if (access_flags & IB_ACCESS_REMOTE_ATOMIC)
+		hw_access_flags |= MLX4_QP_BIT_RAE;
+	if (access_flags & IB_ACCESS_REMOTE_WRITE)
+		hw_access_flags |= MLX4_QP_BIT_RWE;
+
+	return cpu_to_be32(hw_access_flags);
+}
+
+static void store_sqp_attrs(struct mlx4_ib_sqp *sqp, struct ib_qp_attr *attr,
+			    int attr_mask)
+{
+	if (attr_mask & IB_QP_PKEY_INDEX)
+		sqp->pkey_index = attr->pkey_index;
+	if (attr_mask & IB_QP_QKEY)
+		sqp->qkey = attr->qkey;
+	if (attr_mask & IB_QP_SQ_PSN)
+		sqp->send_psn = attr->sq_psn;
+}
+
+static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
+{
+	path->sched_queue = (path->sched_queue & 0xbf) | ((port - 1) << 6);
+}
+
+static int mlx4_set_path(struct mlx4_ib_dev *dev, struct ib_ah_attr *ah,
+			 struct mlx4_qp_path *path, u8 port)
+{
+	path->grh_mylmc     = ah->src_path_bits & 0x7f;
+	path->rlid	    = cpu_to_be16(ah->dlid);
+	if (ah->static_rate) {
+		path->static_rate = ah->static_rate + MLX4_STAT_RATE_OFFSET;
+		while (path->static_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
+		       !(1 << path->static_rate & dev->dev->caps.stat_rate_support))
+			--path->static_rate;
+	} else
+		path->static_rate = 0;
+	path->counter_index = 0xff;
+
+	if (ah->ah_flags & IB_AH_GRH) {
+		if (ah->grh.sgid_index >= dev->dev->caps.gid_table_len) {
+			printk(KERN_ERR "sgid_index (%u) too large. max is %d\n",
+			       ah->grh.sgid_index, dev->dev->caps.gid_table_len - 1);
+			return -1;
+		}
+
+		path->grh_mylmc |= 1 << 7;
+		path->mgid_index = ah->grh.sgid_index;
+		path->hop_limit  = ah->grh.hop_limit;
+		path->tclass_flowlabel =
+			cpu_to_be32((ah->grh.traffic_class << 20) |
+				    (ah->grh.flow_label));
+		memcpy(path->rgid, ah->grh.dgid.raw, 16);
+	}
+
+	path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
+		((port - 1) << 6) | ((ah->sl & 0xf) << 2);
+
+	return 0;
+}
+
+int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+		      int attr_mask, struct ib_udata *udata)
+{
+	struct mlx4_ib_dev *dev = to_mdev(ibqp->device);
+	struct mlx4_ib_qp *qp = to_mqp(ibqp);
+	struct mlx4_qp_context *context;
+	enum mlx4_qp_optpar optpar = 0;
+	enum ib_qp_state cur_state, new_state;
+	int sqd_event;
+	int err = -EINVAL;
+
+	context = kzalloc(sizeof *context, GFP_KERNEL);
+	if (!context)
+		return -ENOMEM;
+
+	mutex_lock(&qp->mutex);
+
+	cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state;
+	new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
+
+	if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask))
+		goto out;
+
+	if ((attr_mask & IB_QP_PKEY_INDEX) &&
+	     attr->pkey_index >= dev->dev->caps.pkey_table_len) {
+		goto out;
+	}
+
+	if ((attr_mask & IB_QP_PORT) &&
+	    (attr->port_num == 0 || attr->port_num > dev->dev->caps.num_ports)) {
+		goto out;
+	}
+
+	if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
+	    attr->max_rd_atomic > dev->dev->caps.max_qp_init_rdma) {
+		goto out;
+	}
+
+	if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
+	    attr->max_dest_rd_atomic > 1 << dev->dev->caps.max_qp_dest_rdma) {
+		goto out;
+	}
+
+	context->flags = cpu_to_be32((to_mlx4_state(new_state) << 28) |
+				     (to_mlx4_st(ibqp->qp_type) << 16));
+	context->flags     |= cpu_to_be32(1 << 8); /* DE? */
+
+	if (!(attr_mask & IB_QP_PATH_MIG_STATE))
+		context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
+	else {
+		optpar |= MLX4_QP_OPTPAR_PM_STATE;
+		switch (attr->path_mig_state) {
+		case IB_MIG_MIGRATED:
+			context->flags |= cpu_to_be32(MLX4_QP_PM_MIGRATED << 11);
+			break;
+		case IB_MIG_REARM:
+			context->flags |= cpu_to_be32(MLX4_QP_PM_REARM << 11);
+			break;
+		case IB_MIG_ARMED:
+			context->flags |= cpu_to_be32(MLX4_QP_PM_ARMED << 11);
+			break;
+		}
+	}
+
+	if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
+	    ibqp->qp_type == IB_QPT_UD)
+		context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
+	else if (attr_mask & IB_QP_PATH_MTU) {
+		if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) {
+			printk(KERN_ERR "path MTU (%u) is invalid\n",
+			       attr->path_mtu);
+			return -EINVAL;
+		}
+		context->mtu_msgmax = (attr->path_mtu << 5) | 31;
+	}
+
+	if (qp->rq.max)
+		context->rq_size_stride = ilog2(qp->rq.max) << 3;
+	context->rq_size_stride |= qp->rq.wqe_shift - 4;
+
+	if (qp->sq.max)
+		context->sq_size_stride = ilog2(qp->sq.max) << 3;
+	context->sq_size_stride |= qp->sq.wqe_shift - 4;
+
+	if (qp->ibqp.uobject)
+		context->usr_page = cpu_to_be32(to_mucontext(ibqp->uobject->context)->uar.index);
+	else
+		context->usr_page = cpu_to_be32(dev->priv_uar.index);
+
+	if (attr_mask & IB_QP_DEST_QPN)
+		context->remote_qpn = cpu_to_be32(attr->dest_qp_num);
+
+	if (attr_mask & IB_QP_PORT) {
+		if (cur_state == IB_QPS_SQD && new_state == IB_QPS_SQD &&
+		    !(attr_mask & IB_QP_AV)) {
+			mlx4_set_sched(&context->pri_path, attr->port_num);
+			optpar |= MLX4_QP_OPTPAR_SCHED_QUEUE;
+		}
+	}
+
+	if (attr_mask & IB_QP_PKEY_INDEX) {
+		context->pri_path.pkey_index = attr->pkey_index;
+		optpar |= MLX4_QP_OPTPAR_PKEY_INDEX;
+	}
+
+	if (attr_mask & IB_QP_RNR_RETRY) {
+		context->params1 |= cpu_to_be32(attr->rnr_retry << 13);
+		optpar |= MLX4_QP_OPTPAR_RNR_RETRY;
+	}
+
+	if (attr_mask & IB_QP_AV) {
+		if (mlx4_set_path(dev, &attr->ah_attr, &context->pri_path,
+				  attr_mask & IB_QP_PORT ? attr->port_num : qp->port)) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		optpar |= (MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH |
+			   MLX4_QP_OPTPAR_SCHED_QUEUE);
+	}
+
+	if (attr_mask & IB_QP_TIMEOUT) {
+		context->pri_path.ackto = attr->timeout << 3;
+		optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
+	}
+
+	if (attr_mask & IB_QP_ALT_PATH) {
+		if (attr->alt_pkey_index >= dev->dev->caps.pkey_table_len)
+			return -EINVAL;
+
+		if (attr->alt_port_num == 0 ||
+		    attr->alt_port_num > dev->dev->caps.num_ports)
+			return -EINVAL;
+
+		if (mlx4_set_path(dev, &attr->alt_ah_attr, &context->alt_path,
+				  attr->alt_port_num))
+			return -EINVAL;
+
+		context->alt_path.pkey_index = attr->alt_pkey_index;
+		context->alt_path.ackto = attr->alt_timeout << 3;
+		optpar |= MLX4_QP_OPTPAR_ALT_ADDR_PATH;
+	}
+
+	context->pd	    = cpu_to_be32(to_mpd(ibqp->pd)->pdn);
+	context->params1    = cpu_to_be32(MLX4_IB_ACK_REQ_FREQ << 28);
+	if (attr_mask & IB_QP_RETRY_CNT) {
+		context->params1 |= cpu_to_be32(attr->retry_cnt << 16);
+		optpar |= MLX4_QP_OPTPAR_RETRY_COUNT;
+	}
+
+	if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
+		if (attr->max_rd_atomic)
+			context->params1 |=
+				cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21);
+		optpar |= MLX4_QP_OPTPAR_SRA_MAX;
+	}
+
+	if (attr_mask & IB_QP_SQ_PSN)
+		context->next_send_psn = cpu_to_be32(attr->sq_psn);
+
+	context->cqn_send = cpu_to_be32(to_mcq(ibqp->send_cq)->mcq.cqn);
+
+	if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
+		if (attr->max_dest_rd_atomic)
+			context->params2 |=
+				cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21);
+		optpar |= MLX4_QP_OPTPAR_RRA_MAX;
+	}
+
+	if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) {
+		context->params2 |= to_mlx4_access_flags(qp, attr, attr_mask);
+		optpar |= MLX4_QP_OPTPAR_RWE | MLX4_QP_OPTPAR_RRE | MLX4_QP_OPTPAR_RAE;
+	}
+
+	if (ibqp->srq)
+		context->params2 |= cpu_to_be32(MLX4_QP_BIT_RIC);
+
+	if (attr_mask & IB_QP_MIN_RNR_TIMER) {
+		context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24);
+		optpar |= MLX4_QP_OPTPAR_RNR_TIMEOUT;
+	}
+	if (attr_mask & IB_QP_RQ_PSN)
+		context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn);
+
+	context->cqn_recv = cpu_to_be32(to_mcq(ibqp->recv_cq)->mcq.cqn);
+
+	if (attr_mask & IB_QP_QKEY) {
+		context->qkey = cpu_to_be32(attr->qkey);
+		optpar |= MLX4_QP_OPTPAR_Q_KEY;
+	}
+
+	if (ibqp->srq)
+		context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->msrq.srqn);
+
+	if (cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT)
+		context->db_rec_addr = cpu_to_be64(qp->db.dma);
+
+	if (cur_state == IB_QPS_INIT &&
+	    new_state == IB_QPS_RTR  &&
+	    (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
+	     ibqp->qp_type == IB_QPT_UD)) {
+		context->pri_path.sched_queue = (qp->port - 1) << 6;
+		if (is_qp0(dev, qp))
+			context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
+		else
+			context->pri_path.sched_queue |= MLX4_IB_DEFAULT_SCHED_QUEUE;
+	}
+
+	if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD	&&
+	    attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify)
+		sqd_event = 1;
+	else
+		sqd_event = 0;
+
+	err = mlx4_qp_modify(dev->dev, &qp->mtt, to_mlx4_state(cur_state),
+			     to_mlx4_state(new_state), context, optpar,
+			     sqd_event, &qp->mqp);
+	if (err)
+		goto out;
+
+	qp->state = new_state;
+
+	if (attr_mask & IB_QP_ACCESS_FLAGS)
+		qp->atomic_rd_en = attr->qp_access_flags;
+	if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
+		qp->resp_depth = attr->max_dest_rd_atomic;
+	if (attr_mask & IB_QP_PORT)
+		qp->port = attr->port_num;
+	if (attr_mask & IB_QP_ALT_PATH)
+		qp->alt_port = attr->alt_port_num;
+
+	if (is_sqp(dev, qp))
+		store_sqp_attrs(to_msqp(qp), attr, attr_mask);
+
+	/*
+	 * If we moved QP0 to RTR, bring the IB link up; if we moved
+	 * QP0 to RESET or ERROR, bring the link back down.
+	 */
+	if (is_qp0(dev, qp)) {
+		if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR)
+			init_port(dev, qp->port);
+
+		if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR &&
+		    (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR))
+			mlx4_CLOSE_PORT(dev->dev, qp->port);
+	}
+
+	/*
+	 * If we moved a kernel QP to RESET, clean up all old CQ
+	 * entries and reinitialize the QP.
+	 */
+	if (new_state == IB_QPS_RESET && !ibqp->uobject) {
+		mlx4_ib_cq_clean(to_mcq(ibqp->recv_cq), qp->mqp.qpn,
+				 ibqp->srq ? to_msrq(ibqp->srq): NULL);
+		if (ibqp->send_cq != ibqp->recv_cq)
+			mlx4_ib_cq_clean(to_mcq(ibqp->send_cq), qp->mqp.qpn, NULL);
+
+		qp->rq.head = 0;
+		qp->rq.tail = 0;
+		qp->sq.head = 0;
+		qp->sq.tail = 0;
+		*qp->db.db  = 0;
+	}
+
+out:
+	mutex_unlock(&qp->mutex);
+	kfree(context);
+	return err;
+}
+
+static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
+			    void *wqe)
+{
+	struct ib_device *ib_dev = &to_mdev(sqp->qp.ibqp.device)->ib_dev;
+	struct mlx4_wqe_mlx_seg *mlx = wqe;
+	struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
+	struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
+	u16 pkey;
+	int send_size;
+	int header_size;
+	int i;
+
+	send_size = 0;
+	for (i = 0; i < wr->num_sge; ++i)
+		send_size += wr->sg_list[i].length;
+
+	ib_ud_header_init(send_size, mlx4_ib_ah_grh_present(ah), &sqp->ud_header);
+
+	sqp->ud_header.lrh.service_level   =
+		be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28;
+	sqp->ud_header.lrh.destination_lid = ah->av.dlid;
+	sqp->ud_header.lrh.source_lid      = cpu_to_be16(ah->av.g_slid & 0x7f);
+	if (mlx4_ib_ah_grh_present(ah)) {
+		sqp->ud_header.grh.traffic_class =
+			(be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20) & 0xff;
+		sqp->ud_header.grh.flow_label    =
+			ah->av.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
+		ib_get_cached_gid(ib_dev, be32_to_cpu(ah->av.port_pd) >> 24,
+				  ah->av.gid_index, &sqp->ud_header.grh.source_gid);
+		memcpy(sqp->ud_header.grh.destination_gid.raw,
+		       ah->av.dgid, 16);
+	}
+
+	mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
+	mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
+				  (sqp->ud_header.lrh.destination_lid ==
+				   IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
+				  (sqp->ud_header.lrh.service_level << 8));
+	mlx->rlid   = sqp->ud_header.lrh.destination_lid;
+
+	switch (wr->opcode) {
+	case IB_WR_SEND:
+		sqp->ud_header.bth.opcode	 = IB_OPCODE_UD_SEND_ONLY;
+		sqp->ud_header.immediate_present = 0;
+		break;
+	case IB_WR_SEND_WITH_IMM:
+		sqp->ud_header.bth.opcode	 = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
+		sqp->ud_header.immediate_present = 1;
+		sqp->ud_header.immediate_data    = wr->imm_data;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	sqp->ud_header.lrh.virtual_lane    = !sqp->qp.ibqp.qp_num ? 15 : 0;
+	if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
+		sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
+	sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
+	if (!sqp->qp.ibqp.qp_num)
+		ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
+	else
+		ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
+	sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
+	sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
+	sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
+	sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
+					       sqp->qkey : wr->wr.ud.remote_qkey);
+	sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
+
+	header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
+
+	if (0) {
+		printk(KERN_ERR "built UD header of size %d:\n", header_size);
+		for (i = 0; i < header_size / 4; ++i) {
+			if (i % 8 == 0)
+				printk("  [%02x] ", i * 4);
+			printk(" %08x",
+			       be32_to_cpu(((__be32 *) sqp->header_buf)[i]));
+			if ((i + 1) % 8 == 0)
+				printk("\n");
+		}
+		printk("\n");
+	}
+
+	inl->byte_count = cpu_to_be32(1 << 31 | header_size);
+	memcpy(inl + 1, sqp->header_buf, header_size);
+
+	return ALIGN(sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
+}
+
+static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
+{
+	unsigned cur;
+	struct mlx4_ib_cq *cq;
+
+	cur = wq->head - wq->tail;
+	if (likely(cur + nreq < wq->max))
+		return 0;
+
+	cq = to_mcq(ib_cq);
+	spin_lock(&cq->lock);
+	cur = wq->head - wq->tail;
+	spin_unlock(&cq->lock);
+
+	return cur + nreq >= wq->max;
+}
+
+int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
+		      struct ib_send_wr **bad_wr)
+{
+	struct mlx4_ib_qp *qp = to_mqp(ibqp);
+	void *wqe;
+	struct mlx4_wqe_ctrl_seg *ctrl;
+	unsigned long flags;
+	int nreq;
+	int err = 0;
+	int ind;
+	int size;
+	int i;
+
+	spin_lock_irqsave(&qp->rq.lock, flags);
+
+	ind = qp->sq.head;
+
+	for (nreq = 0; wr; ++nreq, wr = wr->next) {
+		if (mlx4_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) {
+			err = -ENOMEM;
+			*bad_wr = wr;
+			goto out;
+		}
+
+		if (unlikely(wr->num_sge > qp->sq.max_gs)) {
+			err = -EINVAL;
+			*bad_wr = wr;
+			goto out;
+		}
+
+		ctrl = wqe = get_send_wqe(qp, ind & (qp->sq.max - 1));
+		qp->sq.wrid[ind & (qp->sq.max - 1)] = wr->wr_id;
+
+		ctrl->srcrb_flags =
+			(wr->send_flags & IB_SEND_SIGNALED ?
+			 cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE) : 0) |
+			(wr->send_flags & IB_SEND_SOLICITED ?
+			 cpu_to_be32(MLX4_WQE_CTRL_SOLICITED) : 0) |
+			qp->sq_signal_bits;
+
+		if (wr->opcode == IB_WR_SEND_WITH_IMM ||
+		    wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM)
+			ctrl->imm = wr->imm_data;
+		else
+			ctrl->imm = 0;
+
+		wqe += sizeof *ctrl;
+		size = sizeof *ctrl / 16;
+
+		switch (ibqp->qp_type) {
+		case IB_QPT_RC:
+		case IB_QPT_UC:
+			switch (wr->opcode) {
+			case IB_WR_ATOMIC_CMP_AND_SWP:
+			case IB_WR_ATOMIC_FETCH_AND_ADD:
+				((struct mlx4_wqe_raddr_seg *) wqe)->raddr =
+					cpu_to_be64(wr->wr.atomic.remote_addr);
+				((struct mlx4_wqe_raddr_seg *) wqe)->rkey =
+					cpu_to_be32(wr->wr.atomic.rkey);
+				((struct mlx4_wqe_raddr_seg *) wqe)->reserved = 0;
+
+				wqe  += sizeof (struct mlx4_wqe_raddr_seg);
+
+				if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) {
+					((struct mlx4_wqe_atomic_seg *) wqe)->swap_add =
+						cpu_to_be64(wr->wr.atomic.swap);
+					((struct mlx4_wqe_atomic_seg *) wqe)->compare =
+						cpu_to_be64(wr->wr.atomic.compare_add);
+				} else {
+					((struct mlx4_wqe_atomic_seg *) wqe)->swap_add =
+						cpu_to_be64(wr->wr.atomic.compare_add);
+					((struct mlx4_wqe_atomic_seg *) wqe)->compare = 0;
+				}
+
+				wqe  += sizeof (struct mlx4_wqe_atomic_seg);
+				size += (sizeof (struct mlx4_wqe_raddr_seg) +
+					 sizeof (struct mlx4_wqe_atomic_seg)) / 16;
+
+				break;
+
+			case IB_WR_RDMA_READ:
+			case IB_WR_RDMA_WRITE:
+			case IB_WR_RDMA_WRITE_WITH_IMM:
+				((struct mlx4_wqe_raddr_seg *) wqe)->raddr =
+					cpu_to_be64(wr->wr.rdma.remote_addr);
+				((struct mlx4_wqe_raddr_seg *) wqe)->rkey =
+					cpu_to_be32(wr->wr.rdma.rkey);
+				((struct mlx4_wqe_raddr_seg *) wqe)->reserved = 0;
+
+				wqe  += sizeof (struct mlx4_wqe_raddr_seg);
+				size += sizeof (struct mlx4_wqe_raddr_seg) / 16;
+
+				break;
+
+			default:
+				/* No extra segments required for sends */
+				break;
+			}
+			break;
+
+		case IB_QPT_UD:
+			memcpy(((struct mlx4_wqe_datagram_seg *) wqe)->av,
+			       &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
+			((struct mlx4_wqe_datagram_seg *) wqe)->dqpn =
+				cpu_to_be32(wr->wr.ud.remote_qpn);
+			((struct mlx4_wqe_datagram_seg *) wqe)->qkey =
+				cpu_to_be32(wr->wr.ud.remote_qkey);
+
+			wqe  += sizeof (struct mlx4_wqe_datagram_seg);
+			size += sizeof (struct mlx4_wqe_datagram_seg) / 16;
+			break;
+
+		case IB_QPT_SMI:
+		case IB_QPT_GSI:
+			err = build_mlx_header(to_msqp(qp), wr, ctrl);
+			if (err < 0) {
+				*bad_wr = wr;
+				goto out;
+			}
+			wqe  += err;
+			size += err / 16;
+
+			err = 0;
+			break;
+
+		default:
+			break;
+		}
+
+		for (i = 0; i < wr->num_sge; ++i) {
+			((struct mlx4_wqe_data_seg *) wqe)->byte_count =
+				cpu_to_be32(wr->sg_list[i].length);
+			((struct mlx4_wqe_data_seg *) wqe)->lkey =
+				cpu_to_be32(wr->sg_list[i].lkey);
+			((struct mlx4_wqe_data_seg *) wqe)->addr =
+				cpu_to_be64(wr->sg_list[i].addr);
+
+			wqe  += sizeof (struct mlx4_wqe_data_seg);
+			size += sizeof (struct mlx4_wqe_data_seg) / 16;
+		}
+
+		/* Add one more inline data segment for ICRC for MLX sends */
+		if (qp->ibqp.qp_type == IB_QPT_SMI || qp->ibqp.qp_type == IB_QPT_GSI) {
+			((struct mlx4_wqe_inline_seg *) wqe)->byte_count =
+				cpu_to_be32((1 << 31) | 4);
+			((u32 *) wqe)[1] = 0;
+			wqe  += sizeof (struct mlx4_wqe_data_seg);
+			size += sizeof (struct mlx4_wqe_data_seg) / 16;
+		}
+
+		ctrl->fence_size = (wr->send_flags & IB_SEND_FENCE ?
+				    MLX4_WQE_CTRL_FENCE : 0) | size;
+
+		/*
+		 * Make sure descriptor is fully written before
+		 * setting ownership bit (because HW can start
+		 * executing as soon as we do).
+		 */
+		wmb();
+
+		if (wr->opcode < 0 || wr->opcode > ARRAY_SIZE(mlx4_ib_opcode)) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		ctrl->owner_opcode = mlx4_ib_opcode[wr->opcode] |
+			(ind & qp->sq.max ? cpu_to_be32(1 << 31) : 0);
+
+		++ind;
+	}
+
+out:
+	if (likely(nreq)) {
+		qp->sq.head += nreq;
+
+		/*
+		 * Make sure that descriptors are written before
+		 * doorbell record.
+		 */
+		wmb();
+
+		writel(qp->doorbell_qpn,
+		       to_mdev(ibqp->device)->uar_map + MLX4_SEND_DOORBELL);
+
+		/*
+		 * Make sure doorbells don't leak out of SQ spinlock
+		 * and reach the HCA out of order.
+		 */
+		mmiowb();
+	}
+
+	spin_unlock_irqrestore(&qp->rq.lock, flags);
+
+	return err;
+}
+
+int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
+		      struct ib_recv_wr **bad_wr)
+{
+	struct mlx4_ib_qp *qp = to_mqp(ibqp);
+	struct mlx4_wqe_data_seg *scat;
+	unsigned long flags;
+	int err = 0;
+	int nreq;
+	int ind;
+	int i;
+
+	spin_lock_irqsave(&qp->rq.lock, flags);
+
+	ind = qp->rq.head & (qp->rq.max - 1);
+
+	for (nreq = 0; wr; ++nreq, wr = wr->next) {
+		if (mlx4_wq_overflow(&qp->rq, nreq, qp->ibqp.send_cq)) {
+			err = -ENOMEM;
+			*bad_wr = wr;
+			goto out;
+		}
+
+		if (unlikely(wr->num_sge > qp->rq.max_gs)) {
+			err = -EINVAL;
+			*bad_wr = wr;
+			goto out;
+		}
+
+		scat = get_recv_wqe(qp, ind);
+
+		for (i = 0; i < wr->num_sge; ++i) {
+			scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length);
+			scat[i].lkey       = cpu_to_be32(wr->sg_list[i].lkey);
+			scat[i].addr       = cpu_to_be64(wr->sg_list[i].addr);
+		}
+
+		if (i < qp->rq.max_gs) {
+			scat[i].byte_count = 0;
+			scat[i].lkey       = cpu_to_be32(MLX4_INVALID_LKEY);
+			scat[i].addr       = 0;
+		}
+
+		qp->rq.wrid[ind] = wr->wr_id;
+
+		ind = (ind + 1) & (qp->rq.max - 1);
+	}
+
+out:
+	if (likely(nreq)) {
+		qp->rq.head += nreq;
+
+		/*
+		 * Make sure that descriptors are written before
+		 * doorbell record.
+		 */
+		wmb();
+
+		*qp->db.db = cpu_to_be32(qp->rq.head & 0xffff);
+	}
+
+	spin_unlock_irqrestore(&qp->rq.lock, flags);
+
+	return err;
+}

drivers/infiniband/hw/mlx4/srq.c

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/mlx4/qp.h>
+#include <linux/mlx4/srq.h>
+
+#include "mlx4_ib.h"
+#include "user.h"
+
+static void *get_wqe(struct mlx4_ib_srq *srq, int n)
+{
+	int offset = n << srq->msrq.wqe_shift;
+
+	if (srq->buf.nbufs == 1)
+		return srq->buf.u.direct.buf + offset;
+	else
+		return srq->buf.u.page_list[offset >> PAGE_SHIFT].buf +
+			(offset & (PAGE_SIZE - 1));
+}
+
+static void mlx4_ib_srq_event(struct mlx4_srq *srq, enum mlx4_event type)
+{
+	struct ib_event event;
+	struct ib_srq *ibsrq = &to_mibsrq(srq)->ibsrq;
+
+	if (ibsrq->event_handler) {
+		event.device      = ibsrq->device;
+		event.element.srq = ibsrq;
+		switch (type) {
+		case MLX4_EVENT_TYPE_SRQ_LIMIT:
+			event.event = IB_EVENT_SRQ_LIMIT_REACHED;
+			break;
+		case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR:
+			event.event = IB_EVENT_SRQ_ERR;
+			break;
+		default:
+			printk(KERN_WARNING "mlx4_ib: Unexpected event type %d "
+			       "on SRQ %06x\n", type, srq->srqn);
+			return;
+		}
+
+		ibsrq->event_handler(&event, ibsrq->srq_context);
+	}
+}
+
+struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
+				  struct ib_srq_init_attr *init_attr,
+				  struct ib_udata *udata)
+{
+	struct mlx4_ib_dev *dev = to_mdev(pd->device);
+	struct mlx4_ib_srq *srq;
+	struct mlx4_wqe_srq_next_seg *next;
+	int desc_size;
+	int buf_size;
+	int err;
+	int i;
+
+	/* Sanity check SRQ size before proceeding */
+	if (init_attr->attr.max_wr  >= dev->dev->caps.max_srq_wqes ||
+	    init_attr->attr.max_sge >  dev->dev->caps.max_srq_sge)
+		return ERR_PTR(-EINVAL);
+
+	srq = kmalloc(sizeof *srq, GFP_KERNEL);
+	if (!srq)
+		return ERR_PTR(-ENOMEM);
+
+	mutex_init(&srq->mutex);
+	spin_lock_init(&srq->lock);
+	srq->msrq.max    = roundup_pow_of_two(init_attr->attr.max_wr + 1);
+	srq->msrq.max_gs = init_attr->attr.max_sge;
+
+	desc_size = max(32UL,
+			roundup_pow_of_two(sizeof (struct mlx4_wqe_srq_next_seg) +
+					   srq->msrq.max_gs *
+					   sizeof (struct mlx4_wqe_data_seg)));
+	srq->msrq.wqe_shift = ilog2(desc_size);
+
+	buf_size = srq->msrq.max * desc_size;
+
+	if (pd->uobject) {
+		struct mlx4_ib_create_srq ucmd;
+
+		if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
+			err = -EFAULT;
+			goto err_srq;
+		}
+
+		srq->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr,
+					buf_size, 0);
+		if (IS_ERR(srq->umem)) {
+			err = PTR_ERR(srq->umem);
+			goto err_srq;
+		}
+
+		err = mlx4_mtt_init(dev->dev, ib_umem_page_count(srq->umem),
+				    ilog2(srq->umem->page_size), &srq->mtt);
+		if (err)
+			goto err_buf;
+
+		err = mlx4_ib_umem_write_mtt(dev, &srq->mtt, srq->umem);
+		if (err)
+			goto err_mtt;
+
+		err = mlx4_ib_db_map_user(to_mucontext(pd->uobject->context),
+					  ucmd.db_addr, &srq->db);
+		if (err)
+			goto err_mtt;
+	} else {
+		err = mlx4_ib_db_alloc(dev, &srq->db, 0);
+		if (err)
+			goto err_srq;
+
+		*srq->db.db = 0;
+
+		if (mlx4_buf_alloc(dev->dev, buf_size, PAGE_SIZE * 2, &srq->buf)) {
+			err = -ENOMEM;
+			goto err_db;
+		}
+
+		srq->head    = 0;
+		srq->tail    = srq->msrq.max - 1;
+		srq->wqe_ctr = 0;
+
+		for (i = 0; i < srq->msrq.max; ++i) {
+			next = get_wqe(srq, i);
+			next->next_wqe_index =
+				cpu_to_be16((i + 1) & (srq->msrq.max - 1));
+		}
+
+		err = mlx4_mtt_init(dev->dev, srq->buf.npages, srq->buf.page_shift,
+				    &srq->mtt);
+		if (err)
+			goto err_buf;
+
+		err = mlx4_buf_write_mtt(dev->dev, &srq->mtt, &srq->buf);
+		if (err)
+			goto err_mtt;
+
+		srq->wrid = kmalloc(srq->msrq.max * sizeof (u64), GFP_KERNEL);
+		if (!srq->wrid) {
+			err = -ENOMEM;
+			goto err_mtt;
+		}
+	}
+
+	err = mlx4_srq_alloc(dev->dev, to_mpd(pd)->pdn, &srq->mtt,
+			     srq->db.dma, &srq->msrq);
+	if (err)
+		goto err_wrid;
+
+	srq->msrq.event = mlx4_ib_srq_event;
+
+	if (pd->uobject)
+		if (ib_copy_to_udata(udata, &srq->msrq.srqn, sizeof (__u32))) {
+			err = -EFAULT;
+			goto err_wrid;
+		}
+
+	init_attr->attr.max_wr = srq->msrq.max - 1;
+
+	return &srq->ibsrq;
+
+err_wrid:
+	if (pd->uobject)
+		mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &srq->db);
+	else
+		kfree(srq->wrid);
+
+err_mtt:
+	mlx4_mtt_cleanup(dev->dev, &srq->mtt);
+
+err_buf:
+	if (pd->uobject)
+		ib_umem_release(srq->umem);
+	else
+		mlx4_buf_free(dev->dev, buf_size, &srq->buf);
+
+err_db:
+	if (!pd->uobject)
+		mlx4_ib_db_free(dev, &srq->db);
+
+err_srq:
+	kfree(srq);
+
+	return ERR_PTR(err);
+}
+
+int mlx4_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
+		       enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
+{
+	struct mlx4_ib_dev *dev = to_mdev(ibsrq->device);
+	struct mlx4_ib_srq *srq = to_msrq(ibsrq);
+	int ret;
+
+	/* We don't support resizing SRQs (yet?) */
+	if (attr_mask & IB_SRQ_MAX_WR)
+		return -EINVAL;
+
+	if (attr_mask & IB_SRQ_LIMIT) {
+		if (attr->srq_limit >= srq->msrq.max)
+			return -EINVAL;
+
+		mutex_lock(&srq->mutex);
+		ret = mlx4_srq_arm(dev->dev, &srq->msrq, attr->srq_limit);
+		mutex_unlock(&srq->mutex);
+
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+int mlx4_ib_destroy_srq(struct ib_srq *srq)
+{
+	struct mlx4_ib_dev *dev = to_mdev(srq->device);
+	struct mlx4_ib_srq *msrq = to_msrq(srq);
+
+	mlx4_srq_free(dev->dev, &msrq->msrq);
+	mlx4_mtt_cleanup(dev->dev, &msrq->mtt);
+
+	if (srq->uobject) {
+		mlx4_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db);
+		ib_umem_release(msrq->umem);
+	} else {
+		kfree(msrq->wrid);
+		mlx4_buf_free(dev->dev, msrq->msrq.max << msrq->msrq.wqe_shift,
+			      &msrq->buf);
+		mlx4_ib_db_free(dev, &msrq->db);
+	}
+
+	kfree(msrq);
+
+	return 0;
+}
+
+void mlx4_ib_free_srq_wqe(struct mlx4_ib_srq *srq, int wqe_index)
+{
+	struct mlx4_wqe_srq_next_seg *next;
+
+	/* always called with interrupts disabled. */
+	spin_lock(&srq->lock);
+
+	next = get_wqe(srq, srq->tail);
+	next->next_wqe_index = cpu_to_be16(wqe_index);
+	srq->tail = wqe_index;
+
+	spin_unlock(&srq->lock);
+}
+
+int mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
+			  struct ib_recv_wr **bad_wr)
+{
+	struct mlx4_ib_srq *srq = to_msrq(ibsrq);
+	struct mlx4_wqe_srq_next_seg *next;
+	struct mlx4_wqe_data_seg *scat;
+	unsigned long flags;
+	int err = 0;
+	int nreq;
+	int i;
+
+	spin_lock_irqsave(&srq->lock, flags);
+
+	for (nreq = 0; wr; ++nreq, wr = wr->next) {
+		if (unlikely(wr->num_sge > srq->msrq.max_gs)) {
+			err = -EINVAL;
+			*bad_wr = wr;
+			break;
+		}
+
+		srq->wrid[srq->head] = wr->wr_id;
+
+		next      = get_wqe(srq, srq->head);
+		srq->head = be16_to_cpu(next->next_wqe_index);
+		scat      = (struct mlx4_wqe_data_seg *) (next + 1);
+
+		for (i = 0; i < wr->num_sge; ++i) {
+			scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length);
+			scat[i].lkey       = cpu_to_be32(wr->sg_list[i].lkey);
+			scat[i].addr       = cpu_to_be64(wr->sg_list[i].addr);
+		}
+
+		if (i < srq->msrq.max_gs) {
+			scat[i].byte_count = 0;
+			scat[i].lkey       = cpu_to_be32(MLX4_INVALID_LKEY);
+			scat[i].addr       = 0;
+		}
+	}
+
+	if (likely(nreq)) {
+		srq->wqe_ctr += nreq;
+
+		/*
+		 * Make sure that descriptors are written before
+		 * doorbell record.
+		 */
+		wmb();
+
+		*srq->db.db = cpu_to_be32(srq->wqe_ctr);
+	}
+
+	spin_unlock_irqrestore(&srq->lock, flags);
+
+	return err;
+}

drivers/infiniband/hw/mlx4/user.h

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_IB_USER_H
+#define MLX4_IB_USER_H
+
+#include <linux/types.h>
+
+/*
+ * Increment this value if any changes that break userspace ABI
+ * compatibility are made.
+ */
+#define MLX4_IB_UVERBS_ABI_VERSION	1
+
+/*
+ * Make sure that all structs defined in this file remain laid out so
+ * that they pack the same way on 32-bit and 64-bit architectures (to
+ * avoid incompatibility between 32-bit userspace and 64-bit kernels).
+ * In particular do not use pointer types -- pass pointers in __u64
+ * instead.
+ */
+
+struct mlx4_ib_alloc_ucontext_resp {
+	__u32	qp_tab_size;
+	__u16	bf_reg_size;
+	__u16	bf_regs_per_page;
+};
+
+struct mlx4_ib_alloc_pd_resp {
+	__u32	pdn;
+	__u32	reserved;
+};
+
+struct mlx4_ib_create_cq {
+	__u64	buf_addr;
+	__u64	db_addr;
+};
+
+struct mlx4_ib_create_cq_resp {
+	__u32	cqn;
+	__u32	reserved;
+};
+
+struct mlx4_ib_resize_cq {
+	__u64	buf_addr;
+};
+
+struct mlx4_ib_create_srq {
+	__u64	buf_addr;
+	__u64	db_addr;
+};
+
+struct mlx4_ib_create_srq_resp {
+	__u32	srqn;
+	__u32	reserved;
+};
+
+struct mlx4_ib_create_qp {
+	__u64	buf_addr;
+	__u64	db_addr;
+};
+
+#endif /* MLX4_IB_USER_H */

drivers/infiniband/hw/mthca/mthca_provider.c

@@ -37,6 +37,7 @@
  */
 
 #include <rdma/ib_smi.h>
+#include <rdma/ib_umem.h>
 #include <rdma/ib_user_verbs.h>
 #include <linux/mm.h>
 
@@ -908,6 +909,8 @@ static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
 		return ERR_PTR(err);
 	}
 
+	mr->umem = NULL;
+
 	return &mr->ibmr;
 }
 
@@ -1003,11 +1006,13 @@ static struct ib_mr *mthca_reg_phys_mr(struct ib_pd       *pd,
 	}
 
 	kfree(page_list);
+	mr->umem = NULL;
+
 	return &mr->ibmr;
 }
 
-static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
-				       int acc, struct ib_udata *udata)
+static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+				       u64 virt, int acc, struct ib_udata *udata)
 {
 	struct mthca_dev *dev = to_mdev(pd->device);
 	struct ib_umem_chunk *chunk;
@@ -1018,20 +1023,26 @@ static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 	int err = 0;
 	int write_mtt_size;
 
-	shift = ffs(region->page_size) - 1;
-
 	mr = kmalloc(sizeof *mr, GFP_KERNEL);
 	if (!mr)
 		return ERR_PTR(-ENOMEM);
 
+	mr->umem = ib_umem_get(pd->uobject->context, start, length, acc);
+	if (IS_ERR(mr->umem)) {
+		err = PTR_ERR(mr->umem);
+		goto err;
+	}
+
+	shift = ffs(mr->umem->page_size) - 1;
+
 	n = 0;
-	list_for_each_entry(chunk, &region->chunk_list, list)
+	list_for_each_entry(chunk, &mr->umem->chunk_list, list)
 		n += chunk->nents;
 
 	mr->mtt = mthca_alloc_mtt(dev, n);
 	if (IS_ERR(mr->mtt)) {
 		err = PTR_ERR(mr->mtt);
-		goto err;
+		goto err_umem;
 	}
 
 	pages = (u64 *) __get_free_page(GFP_KERNEL);
@@ -1044,12 +1055,12 @@ static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 
 	write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));
 
-	list_for_each_entry(chunk, &region->chunk_list, list)
+	list_for_each_entry(chunk, &mr->umem->chunk_list, list)
 		for (j = 0; j < chunk->nmap; ++j) {
 			len = sg_dma_len(&chunk->page_list[j]) >> shift;
 			for (k = 0; k < len; ++k) {
 				pages[i++] = sg_dma_address(&chunk->page_list[j]) +
-					region->page_size * k;
+					mr->umem->page_size * k;
 				/*
 				 * Be friendly to write_mtt and pass it chunks
 				 * of appropriate size.
@@ -1071,8 +1082,8 @@ static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 	if (err)
 		goto err_mtt;
 
-	err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, region->virt_base,
-			     region->length, convert_access(acc), mr);
+	err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, virt, length,
+			     convert_access(acc), mr);
 
 	if (err)
 		goto err_mtt;
@@ -1082,6 +1093,9 @@ static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 err_mtt:
 	mthca_free_mtt(dev, mr->mtt);
 
+err_umem:
+	ib_umem_release(mr->umem);
+
 err:
 	kfree(mr);
 	return ERR_PTR(err);
@@ -1090,8 +1104,12 @@ static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 static int mthca_dereg_mr(struct ib_mr *mr)
 {
 	struct mthca_mr *mmr = to_mmr(mr);
+
 	mthca_free_mr(to_mdev(mr->device), mmr);
+	if (mmr->umem)
+		ib_umem_release(mmr->umem);
 	kfree(mmr);
+
 	return 0;
 }
 

drivers/infiniband/hw/mthca/mthca_provider.h

@@ -73,6 +73,7 @@ struct mthca_mtt;
 
 struct mthca_mr {
 	struct ib_mr      ibmr;
+	struct ib_umem   *umem;
 	struct mthca_mtt *mtt;
 };
 

drivers/net/Kconfig

@@ -2493,6 +2493,20 @@ config PASEMI_MAC
 	  This driver supports the on-chip 1/10Gbit Ethernet controller on
 	  PA Semi's PWRficient line of chips.
 
+config MLX4_CORE
+	tristate
+	depends on PCI
+	default n
+
+config MLX4_DEBUG
+	bool "Verbose debugging output" if (MLX4_CORE && EMBEDDED)
+	default y
+	---help---
+	  This option causes debugging code to be compiled into the
+	  mlx4_core driver.  The output can be turned on via the
+	  debug_level module parameter (which can also be set after
+	  the driver is loaded through sysfs).
+
 endmenu
 
 source "drivers/net/tokenring/Kconfig"

drivers/net/Makefile

@@ -197,6 +197,7 @@ obj-$(CONFIG_SMC911X) += smc911x.o
 obj-$(CONFIG_DM9000) += dm9000.o
 obj-$(CONFIG_FEC_8XX) += fec_8xx/
 obj-$(CONFIG_PASEMI_MAC) += pasemi_mac.o
+obj-$(CONFIG_MLX4_CORE) += mlx4/
 
 obj-$(CONFIG_MACB) += macb.o
 

drivers/net/mlx4/Makefile

+obj-$(CONFIG_MLX4_CORE)		+= mlx4_core.o
+
+mlx4_core-y :=	alloc.o catas.o cmd.o cq.o eq.o fw.o icm.o intf.o main.o mcg.o \
+		mr.o pd.o profile.o qp.o reset.o srq.o

drivers/net/mlx4/alloc.c

+/*
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/bitmap.h>
+
+#include "mlx4.h"
+
+u32 mlx4_bitmap_alloc(struct mlx4_bitmap *bitmap)
+{
+	u32 obj;
+
+	spin_lock(&bitmap->lock);
+
+	obj = find_next_zero_bit(bitmap->table, bitmap->max, bitmap->last);
+	if (obj >= bitmap->max) {
+		bitmap->top = (bitmap->top + bitmap->max) & bitmap->mask;
+		obj = find_first_zero_bit(bitmap->table, bitmap->max);
+	}
+
+	if (obj < bitmap->max) {
+		set_bit(obj, bitmap->table);
+		obj |= bitmap->top;
+		bitmap->last = obj + 1;
+	} else
+		obj = -1;
+
+	spin_unlock(&bitmap->lock);
+
+	return obj;
+}
+
+void mlx4_bitmap_free(struct mlx4_bitmap *bitmap, u32 obj)
+{
+	obj &= bitmap->max - 1;
+
+	spin_lock(&bitmap->lock);
+	clear_bit(obj, bitmap->table);
+	bitmap->last = min(bitmap->last, obj);
+	bitmap->top = (bitmap->top + bitmap->max) & bitmap->mask;
+	spin_unlock(&bitmap->lock);
+}
+
+int mlx4_bitmap_init(struct mlx4_bitmap *bitmap, u32 num, u32 mask, u32 reserved)
+{
+	int i;
+
+	/* num must be a power of 2 */
+	if (num != roundup_pow_of_two(num))
+		return -EINVAL;
+
+	bitmap->last = 0;
+	bitmap->top  = 0;
+	bitmap->max  = num;
+	bitmap->mask = mask;
+	spin_lock_init(&bitmap->lock);
+	bitmap->table = kzalloc(BITS_TO_LONGS(num) * sizeof (long), GFP_KERNEL);
+	if (!bitmap->table)
+		return -ENOMEM;
+
+	for (i = 0; i < reserved; ++i)
+		set_bit(i, bitmap->table);
+
+	return 0;
+}
+
+void mlx4_bitmap_cleanup(struct mlx4_bitmap *bitmap)
+{
+	kfree(bitmap->table);
+}
+
+/*
+ * Handling for queue buffers -- we allocate a bunch of memory and
+ * register it in a memory region at HCA virtual address 0.  If the
+ * requested size is > max_direct, we split the allocation into
+ * multiple pages, so we don't require too much contiguous memory.
+ */
+
+int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct,
+		   struct mlx4_buf *buf)
+{
+	dma_addr_t t;
+
+	if (size <= max_direct) {
+		buf->nbufs        = 1;
+		buf->npages       = 1;
+		buf->page_shift   = get_order(size) + PAGE_SHIFT;
+		buf->u.direct.buf = dma_alloc_coherent(&dev->pdev->dev,
+						       size, &t, GFP_KERNEL);
+		if (!buf->u.direct.buf)
+			return -ENOMEM;
+
+		buf->u.direct.map = t;
+
+		while (t & ((1 << buf->page_shift) - 1)) {
+			--buf->page_shift;
+			buf->npages *= 2;
+		}
+
+		memset(buf->u.direct.buf, 0, size);
+	} else {
+		int i;
+
+		buf->nbufs       = (size + PAGE_SIZE - 1) / PAGE_SIZE;
+		buf->npages      = buf->nbufs;
+		buf->page_shift  = PAGE_SHIFT;
+		buf->u.page_list = kzalloc(buf->nbufs * sizeof *buf->u.page_list,
+					   GFP_KERNEL);
+		if (!buf->u.page_list)
+			return -ENOMEM;
+
+		for (i = 0; i < buf->nbufs; ++i) {
+			buf->u.page_list[i].buf =
+				dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE,
+						   &t, GFP_KERNEL);
+			if (!buf->u.page_list[i].buf)
+				goto err_free;
+
+			buf->u.page_list[i].map = t;
+
+			memset(buf->u.page_list[i].buf, 0, PAGE_SIZE);
+		}
+	}
+
+	return 0;
+
+err_free:
+	mlx4_buf_free(dev, size, buf);
+
+	return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(mlx4_buf_alloc);
+
+void mlx4_buf_free(struct mlx4_dev *dev, int size, struct mlx4_buf *buf)
+{
+	int i;
+
+	if (buf->nbufs == 1)
+		dma_free_coherent(&dev->pdev->dev, size, buf->u.direct.buf,
+				  buf->u.direct.map);
+	else {
+		for (i = 0; i < buf->nbufs; ++i)
+			dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
+					  buf->u.page_list[i].buf,
+					  buf->u.page_list[i].map);
+		kfree(buf->u.page_list);
+	}
+}
+EXPORT_SYMBOL_GPL(mlx4_buf_free);

drivers/net/mlx4/catas.c

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "mlx4.h"
+
+void mlx4_handle_catas_err(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+
+	int i;
+
+	mlx4_err(dev, "Catastrophic error detected:\n");
+	for (i = 0; i < priv->fw.catas_size; ++i)
+		mlx4_err(dev, "  buf[%02x]: %08x\n",
+			 i, swab32(readl(priv->catas_err.map + i)));
+
+	mlx4_dispatch_event(dev, MLX4_EVENT_TYPE_LOCAL_CATAS_ERROR, 0, 0);
+}
+
+void mlx4_map_catas_buf(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	unsigned long addr;
+
+	addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) +
+		priv->fw.catas_offset;
+
+	priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
+	if (!priv->catas_err.map)
+		mlx4_warn(dev, "Failed to map catastrophic error buffer at 0x%lx\n",
+			  addr);
+
+}
+
+void mlx4_unmap_catas_buf(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+
+	if (priv->catas_err.map)
+		iounmap(priv->catas_err.map);
+}

drivers/net/mlx4/cmd.c

+/*
+ * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/sched.h>
+#include <linux/pci.h>
+#include <linux/errno.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include <asm/io.h>
+
+#include "mlx4.h"
+
+#define CMD_POLL_TOKEN 0xffff
+
+enum {
+	/* command completed successfully: */
+	CMD_STAT_OK		= 0x00,
+	/* Internal error (such as a bus error) occurred while processing command: */
+	CMD_STAT_INTERNAL_ERR	= 0x01,
+	/* Operation/command not supported or opcode modifier not supported: */
+	CMD_STAT_BAD_OP		= 0x02,
+	/* Parameter not supported or parameter out of range: */
+	CMD_STAT_BAD_PARAM	= 0x03,
+	/* System not enabled or bad system state: */
+	CMD_STAT_BAD_SYS_STATE	= 0x04,
+	/* Attempt to access reserved or unallocaterd resource: */
+	CMD_STAT_BAD_RESOURCE	= 0x05,
+	/* Requested resource is currently executing a command, or is otherwise busy: */
+	CMD_STAT_RESOURCE_BUSY	= 0x06,
+	/* Required capability exceeds device limits: */
+	CMD_STAT_EXCEED_LIM	= 0x08,
+	/* Resource is not in the appropriate state or ownership: */
+	CMD_STAT_BAD_RES_STATE	= 0x09,
+	/* Index out of range: */
+	CMD_STAT_BAD_INDEX	= 0x0a,
+	/* FW image corrupted: */
+	CMD_STAT_BAD_NVMEM	= 0x0b,
+	/* Attempt to modify a QP/EE which is not in the presumed state: */
+	CMD_STAT_BAD_QP_STATE   = 0x10,
+	/* Bad segment parameters (Address/Size): */
+	CMD_STAT_BAD_SEG_PARAM	= 0x20,
+	/* Memory Region has Memory Windows bound to: */
+	CMD_STAT_REG_BOUND	= 0x21,
+	/* HCA local attached memory not present: */
+	CMD_STAT_LAM_NOT_PRE	= 0x22,
+	/* Bad management packet (silently discarded): */
+	CMD_STAT_BAD_PKT	= 0x30,
+	/* More outstanding CQEs in CQ than new CQ size: */
+	CMD_STAT_BAD_SIZE	= 0x40
+};
+
+enum {
+	HCR_IN_PARAM_OFFSET	= 0x00,
+	HCR_IN_MODIFIER_OFFSET	= 0x08,
+	HCR_OUT_PARAM_OFFSET	= 0x0c,
+	HCR_TOKEN_OFFSET	= 0x14,
+	HCR_STATUS_OFFSET	= 0x18,
+
+	HCR_OPMOD_SHIFT		= 12,
+	HCR_T_BIT		= 21,
+	HCR_E_BIT		= 22,
+	HCR_GO_BIT		= 23
+};
+
+enum {
+	GO_BIT_TIMEOUT		= 10000
+};
+
+struct mlx4_cmd_context {
+	struct completion	done;
+	int			result;
+	int			next;
+	u64			out_param;
+	u16			token;
+};
+
+static int mlx4_status_to_errno(u8 status) {
+	static const int trans_table[] = {
+		[CMD_STAT_INTERNAL_ERR]	  = -EIO,
+		[CMD_STAT_BAD_OP]	  = -EPERM,
+		[CMD_STAT_BAD_PARAM]	  = -EINVAL,
+		[CMD_STAT_BAD_SYS_STATE]  = -ENXIO,
+		[CMD_STAT_BAD_RESOURCE]	  = -EBADF,
+		[CMD_STAT_RESOURCE_BUSY]  = -EBUSY,
+		[CMD_STAT_EXCEED_LIM]	  = -ENOMEM,
+		[CMD_STAT_BAD_RES_STATE]  = -EBADF,
+		[CMD_STAT_BAD_INDEX]	  = -EBADF,
+		[CMD_STAT_BAD_NVMEM]	  = -EFAULT,
+		[CMD_STAT_BAD_QP_STATE]   = -EINVAL,
+		[CMD_STAT_BAD_SEG_PARAM]  = -EFAULT,
+		[CMD_STAT_REG_BOUND]	  = -EBUSY,
+		[CMD_STAT_LAM_NOT_PRE]	  = -EAGAIN,
+		[CMD_STAT_BAD_PKT]	  = -EINVAL,
+		[CMD_STAT_BAD_SIZE]	  = -ENOMEM,
+	};
+
+	if (status >= ARRAY_SIZE(trans_table) ||
+	    (status != CMD_STAT_OK && trans_table[status] == 0))
+		return -EIO;
+
+	return trans_table[status];
+}
+
+static int cmd_pending(struct mlx4_dev *dev)
+{
+	u32 status = readl(mlx4_priv(dev)->cmd.hcr + HCR_STATUS_OFFSET);
+
+	return (status & swab32(1 << HCR_GO_BIT)) ||
+		(mlx4_priv(dev)->cmd.toggle ==
+		 !!(status & swab32(1 << HCR_T_BIT)));
+}
+
+static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param,
+			 u32 in_modifier, u8 op_modifier, u16 op, u16 token,
+			 int event)
+{
+	struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
+	u32 __iomem *hcr = cmd->hcr;
+	int ret = -EAGAIN;
+	unsigned long end;
+
+	mutex_lock(&cmd->hcr_mutex);
+
+	end = jiffies;
+	if (event)
+		end += HZ * 10;
+
+	while (cmd_pending(dev)) {
+		if (time_after_eq(jiffies, end))
+			goto out;
+		cond_resched();
+	}
+
+	/*
+	 * We use writel (instead of something like memcpy_toio)
+	 * because writes of less than 32 bits to the HCR don't work
+	 * (and some architectures such as ia64 implement memcpy_toio
+	 * in terms of writeb).
+	 */
+	__raw_writel((__force u32) cpu_to_be32(in_param >> 32),		  hcr + 0);
+	__raw_writel((__force u32) cpu_to_be32(in_param & 0xfffffffful),  hcr + 1);
+	__raw_writel((__force u32) cpu_to_be32(in_modifier),		  hcr + 2);
+	__raw_writel((__force u32) cpu_to_be32(out_param >> 32),	  hcr + 3);
+	__raw_writel((__force u32) cpu_to_be32(out_param & 0xfffffffful), hcr + 4);
+	__raw_writel((__force u32) cpu_to_be32(token << 16),		  hcr + 5);
+
+	/* __raw_writel may not order writes. */
+	wmb();
+
+	__raw_writel((__force u32) cpu_to_be32((1 << HCR_GO_BIT)		|
+					       (cmd->toggle << HCR_T_BIT)	|
+					       (event ? (1 << HCR_E_BIT) : 0)	|
+					       (op_modifier << HCR_OPMOD_SHIFT) |
+					       op),			  hcr + 6);
+	cmd->toggle = cmd->toggle ^ 1;
+
+	ret = 0;
+
+out:
+	mutex_unlock(&cmd->hcr_mutex);
+	return ret;
+}
+
+static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
+			 int out_is_imm, u32 in_modifier, u8 op_modifier,
+			 u16 op, unsigned long timeout)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	void __iomem *hcr = priv->cmd.hcr;
+	int err = 0;
+	unsigned long end;
+
+	down(&priv->cmd.poll_sem);
+
+	err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
+			    in_modifier, op_modifier, op, CMD_POLL_TOKEN, 0);
+	if (err)
+		goto out;
+
+	end = msecs_to_jiffies(timeout) + jiffies;
+	while (cmd_pending(dev) && time_before(jiffies, end))
+		cond_resched();
+
+	if (cmd_pending(dev)) {
+		err = -ETIMEDOUT;
+		goto out;
+	}
+
+	if (out_is_imm)
+		*out_param =
+			(u64) be32_to_cpu((__force __be32)
+					  __raw_readl(hcr + HCR_OUT_PARAM_OFFSET)) << 32 |
+			(u64) be32_to_cpu((__force __be32)
+					  __raw_readl(hcr + HCR_OUT_PARAM_OFFSET + 4));
+
+	err = mlx4_status_to_errno(be32_to_cpu((__force __be32)
+					       __raw_readl(hcr + HCR_STATUS_OFFSET)) >> 24);
+
+out:
+	up(&priv->cmd.poll_sem);
+	return err;
+}
+
+void mlx4_cmd_event(struct mlx4_dev *dev, u16 token, u8 status, u64 out_param)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_cmd_context *context =
+		&priv->cmd.context[token & priv->cmd.token_mask];
+
+	/* previously timed out command completing at long last */
+	if (token != context->token)
+		return;
+
+	context->result    = mlx4_status_to_errno(status);
+	context->out_param = out_param;
+
+	context->token += priv->cmd.token_mask + 1;
+
+	complete(&context->done);
+}
+
+static int mlx4_cmd_wait(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
+			 int out_is_imm, u32 in_modifier, u8 op_modifier,
+			 u16 op, unsigned long timeout)
+{
+	struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
+	struct mlx4_cmd_context *context;
+	int err = 0;
+
+	down(&cmd->event_sem);
+
+	spin_lock(&cmd->context_lock);
+	BUG_ON(cmd->free_head < 0);
+	context = &cmd->context[cmd->free_head];
+	cmd->free_head = context->next;
+	spin_unlock(&cmd->context_lock);
+
+	init_completion(&context->done);
+
+	mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
+		      in_modifier, op_modifier, op, context->token, 1);
+
+	if (!wait_for_completion_timeout(&context->done, msecs_to_jiffies(timeout))) {
+		err = -EBUSY;
+		goto out;
+	}
+
+	err = context->result;
+	if (err)
+		goto out;
+
+	if (out_is_imm)
+		*out_param = context->out_param;
+
+out:
+	spin_lock(&cmd->context_lock);
+	context->next = cmd->free_head;
+	cmd->free_head = context - cmd->context;
+	spin_unlock(&cmd->context_lock);
+
+	up(&cmd->event_sem);
+	return err;
+}
+
+int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
+	       int out_is_imm, u32 in_modifier, u8 op_modifier,
+	       u16 op, unsigned long timeout)
+{
+	if (mlx4_priv(dev)->cmd.use_events)
+		return mlx4_cmd_wait(dev, in_param, out_param, out_is_imm,
+				     in_modifier, op_modifier, op, timeout);
+	else
+		return mlx4_cmd_poll(dev, in_param, out_param, out_is_imm,
+				     in_modifier, op_modifier, op, timeout);
+}
+EXPORT_SYMBOL_GPL(__mlx4_cmd);
+
+int mlx4_cmd_init(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+
+	mutex_init(&priv->cmd.hcr_mutex);
+	sema_init(&priv->cmd.poll_sem, 1);
+	priv->cmd.use_events = 0;
+	priv->cmd.toggle     = 1;
+
+	priv->cmd.hcr = ioremap(pci_resource_start(dev->pdev, 0) + MLX4_HCR_BASE,
+				MLX4_HCR_SIZE);
+	if (!priv->cmd.hcr) {
+		mlx4_err(dev, "Couldn't map command register.");
+		return -ENOMEM;
+	}
+
+	priv->cmd.pool = pci_pool_create("mlx4_cmd", dev->pdev,
+					 MLX4_MAILBOX_SIZE,
+					 MLX4_MAILBOX_SIZE, 0);
+	if (!priv->cmd.pool) {
+		iounmap(priv->cmd.hcr);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+void mlx4_cmd_cleanup(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+
+	pci_pool_destroy(priv->cmd.pool);
+	iounmap(priv->cmd.hcr);
+}
+
+/*
+ * Switch to using events to issue FW commands (can only be called
+ * after event queue for command events has been initialized).
+ */
+int mlx4_cmd_use_events(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int i;
+
+	priv->cmd.context = kmalloc(priv->cmd.max_cmds *
+				   sizeof (struct mlx4_cmd_context),
+				   GFP_KERNEL);
+	if (!priv->cmd.context)
+		return -ENOMEM;
+
+	for (i = 0; i < priv->cmd.max_cmds; ++i) {
+		priv->cmd.context[i].token = i;
+		priv->cmd.context[i].next  = i + 1;
+	}
+
+	priv->cmd.context[priv->cmd.max_cmds - 1].next = -1;
+	priv->cmd.free_head = 0;
+
+	sema_init(&priv->cmd.event_sem, priv->cmd.max_cmds);
+	spin_lock_init(&priv->cmd.context_lock);
+
+	for (priv->cmd.token_mask = 1;
+	     priv->cmd.token_mask < priv->cmd.max_cmds;
+	     priv->cmd.token_mask <<= 1)
+		; /* nothing */
+	--priv->cmd.token_mask;
+
+	priv->cmd.use_events = 1;
+
+	down(&priv->cmd.poll_sem);
+
+	return 0;
+}
+
+/*
+ * Switch back to polling (used when shutting down the device)
+ */
+void mlx4_cmd_use_polling(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int i;
+
+	priv->cmd.use_events = 0;
+
+	for (i = 0; i < priv->cmd.max_cmds; ++i)
+		down(&priv->cmd.event_sem);
+
+	kfree(priv->cmd.context);
+
+	up(&priv->cmd.poll_sem);
+}
+
+struct mlx4_cmd_mailbox *mlx4_alloc_cmd_mailbox(struct mlx4_dev *dev)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+
+	mailbox = kmalloc(sizeof *mailbox, GFP_KERNEL);
+	if (!mailbox)
+		return ERR_PTR(-ENOMEM);
+
+	mailbox->buf = pci_pool_alloc(mlx4_priv(dev)->cmd.pool, GFP_KERNEL,
+				      &mailbox->dma);
+	if (!mailbox->buf) {
+		kfree(mailbox);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	return mailbox;
+}
+EXPORT_SYMBOL_GPL(mlx4_alloc_cmd_mailbox);
+
+void mlx4_free_cmd_mailbox(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox)
+{
+	if (!mailbox)
+		return;
+
+	pci_pool_free(mlx4_priv(dev)->cmd.pool, mailbox->buf, mailbox->dma);
+	kfree(mailbox);
+}
+EXPORT_SYMBOL_GPL(mlx4_free_cmd_mailbox);

drivers/net/mlx4/cq.c

+/*
+ * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+#include <linux/hardirq.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4.h"
+#include "icm.h"
+
+struct mlx4_cq_context {
+	__be32			flags;
+	u16			reserved1[3];
+	__be16			page_offset;
+	__be32			logsize_usrpage;
+	u8			reserved2;
+	u8			cq_period;
+	u8			reserved3;
+	u8			cq_max_count;
+	u8			reserved4[3];
+	u8			comp_eqn;
+	u8			log_page_size;
+	u8			reserved5[2];
+	u8			mtt_base_addr_h;
+	__be32			mtt_base_addr_l;
+	__be32			last_notified_index;
+	__be32			solicit_producer_index;
+	__be32			consumer_index;
+	__be32			producer_index;
+	u8			reserved6[2];
+	__be64			db_rec_addr;
+};
+
+#define MLX4_CQ_STATUS_OK		( 0 << 28)
+#define MLX4_CQ_STATUS_OVERFLOW		( 9 << 28)
+#define MLX4_CQ_STATUS_WRITE_FAIL	(10 << 28)
+#define MLX4_CQ_FLAG_CC			( 1 << 18)
+#define MLX4_CQ_FLAG_OI			( 1 << 17)
+#define MLX4_CQ_STATE_ARMED		( 9 <<  8)
+#define MLX4_CQ_STATE_ARMED_SOL		( 6 <<  8)
+#define MLX4_EQ_STATE_FIRED		(10 <<  8)
+
+void mlx4_cq_completion(struct mlx4_dev *dev, u32 cqn)
+{
+	struct mlx4_cq *cq;
+
+	cq = radix_tree_lookup(&mlx4_priv(dev)->cq_table.tree,
+			       cqn & (dev->caps.num_cqs - 1));
+	if (!cq) {
+		mlx4_warn(dev, "Completion event for bogus CQ %08x\n", cqn);
+		return;
+	}
+
+	++cq->arm_sn;
+
+	cq->comp(cq);
+}
+
+void mlx4_cq_event(struct mlx4_dev *dev, u32 cqn, int event_type)
+{
+	struct mlx4_cq_table *cq_table = &mlx4_priv(dev)->cq_table;
+	struct mlx4_cq *cq;
+
+	spin_lock(&cq_table->lock);
+
+	cq = radix_tree_lookup(&cq_table->tree, cqn & (dev->caps.num_cqs - 1));
+	if (cq)
+		atomic_inc(&cq->refcount);
+
+	spin_unlock(&cq_table->lock);
+
+	if (!cq) {
+		mlx4_warn(dev, "Async event for bogus CQ %08x\n", cqn);
+		return;
+	}
+
+	cq->event(cq, event_type);
+
+	if (atomic_dec_and_test(&cq->refcount))
+		complete(&cq->free);
+}
+
+static int mlx4_SW2HW_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+			 int cq_num)
+{
+	return mlx4_cmd(dev, mailbox->dma, cq_num, 0, MLX4_CMD_SW2HW_CQ,
+			MLX4_CMD_TIME_CLASS_A);
+}
+
+static int mlx4_HW2SW_CQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+			 int cq_num)
+{
+	return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, cq_num,
+			    mailbox ? 0 : 1, MLX4_CMD_HW2SW_CQ,
+			    MLX4_CMD_TIME_CLASS_A);
+}
+
+int mlx4_cq_alloc(struct mlx4_dev *dev, int nent, struct mlx4_mtt *mtt,
+		  struct mlx4_uar *uar, u64 db_rec, struct mlx4_cq *cq)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_cq_table *cq_table = &priv->cq_table;
+	struct mlx4_cmd_mailbox *mailbox;
+	struct mlx4_cq_context *cq_context;
+	u64 mtt_addr;
+	int err;
+
+	cq->cqn = mlx4_bitmap_alloc(&cq_table->bitmap);
+	if (cq->cqn == -1)
+		return -ENOMEM;
+
+	err = mlx4_table_get(dev, &cq_table->table, cq->cqn);
+	if (err)
+		goto err_out;
+
+	err = mlx4_table_get(dev, &cq_table->cmpt_table, cq->cqn);
+	if (err)
+		goto err_put;
+
+	spin_lock_irq(&cq_table->lock);
+	err = radix_tree_insert(&cq_table->tree, cq->cqn, cq);
+	spin_unlock_irq(&cq_table->lock);
+	if (err)
+		goto err_cmpt_put;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox)) {
+		err = PTR_ERR(mailbox);
+		goto err_radix;
+	}
+
+	cq_context = mailbox->buf;
+	memset(cq_context, 0, sizeof *cq_context);
+
+	cq_context->logsize_usrpage = cpu_to_be32((ilog2(nent) << 24) | uar->index);
+	cq_context->comp_eqn        = priv->eq_table.eq[MLX4_EQ_COMP].eqn;
+	cq_context->log_page_size   = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
+
+	mtt_addr = mlx4_mtt_addr(dev, mtt);
+	cq_context->mtt_base_addr_h = mtt_addr >> 32;
+	cq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
+	cq_context->db_rec_addr     = cpu_to_be64(db_rec);
+
+	err = mlx4_SW2HW_CQ(dev, mailbox, cq->cqn);
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	if (err)
+		goto err_radix;
+
+	cq->cons_index = 0;
+	cq->arm_sn     = 1;
+	cq->uar        = uar;
+	atomic_set(&cq->refcount, 1);
+	init_completion(&cq->free);
+
+	return 0;
+
+err_radix:
+	spin_lock_irq(&cq_table->lock);
+	radix_tree_delete(&cq_table->tree, cq->cqn);
+	spin_unlock_irq(&cq_table->lock);
+
+err_cmpt_put:
+	mlx4_table_put(dev, &cq_table->cmpt_table, cq->cqn);
+
+err_put:
+	mlx4_table_put(dev, &cq_table->table, cq->cqn);
+
+err_out:
+	mlx4_bitmap_free(&cq_table->bitmap, cq->cqn);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_cq_alloc);
+
+void mlx4_cq_free(struct mlx4_dev *dev, struct mlx4_cq *cq)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_cq_table *cq_table = &priv->cq_table;
+	int err;
+
+	err = mlx4_HW2SW_CQ(dev, NULL, cq->cqn);
+	if (err)
+		mlx4_warn(dev, "HW2SW_CQ failed (%d) for CQN %06x\n", err, cq->cqn);
+
+	synchronize_irq(priv->eq_table.eq[MLX4_EQ_COMP].irq);
+
+	spin_lock_irq(&cq_table->lock);
+	radix_tree_delete(&cq_table->tree, cq->cqn);
+	spin_unlock_irq(&cq_table->lock);
+
+	if (atomic_dec_and_test(&cq->refcount))
+		complete(&cq->free);
+	wait_for_completion(&cq->free);
+
+	mlx4_table_put(dev, &cq_table->table, cq->cqn);
+	mlx4_bitmap_free(&cq_table->bitmap, cq->cqn);
+}
+EXPORT_SYMBOL_GPL(mlx4_cq_free);
+
+int __devinit mlx4_init_cq_table(struct mlx4_dev *dev)
+{
+	struct mlx4_cq_table *cq_table = &mlx4_priv(dev)->cq_table;
+	int err;
+
+	spin_lock_init(&cq_table->lock);
+	INIT_RADIX_TREE(&cq_table->tree, GFP_ATOMIC);
+
+	err = mlx4_bitmap_init(&cq_table->bitmap, dev->caps.num_cqs,
+			       dev->caps.num_cqs - 1, dev->caps.reserved_cqs);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+void mlx4_cleanup_cq_table(struct mlx4_dev *dev)
+{
+	/* Nothing to do to clean up radix_tree */
+	mlx4_bitmap_cleanup(&mlx4_priv(dev)->cq_table.bitmap);
+}

drivers/net/mlx4/eq.c

+/*
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *	- Redistributions of source code must retain the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer.
+ *
+ *	- Redistributions in binary form must reproduce the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer in the documentation and/or other materials
+ *	  provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4.h"
+#include "fw.h"
+
+enum {
+	MLX4_NUM_ASYNC_EQE	= 0x100,
+	MLX4_NUM_SPARE_EQE	= 0x80,
+	MLX4_EQ_ENTRY_SIZE	= 0x20
+};
+
+/*
+ * Must be packed because start is 64 bits but only aligned to 32 bits.
+ */
+struct mlx4_eq_context {
+	__be32			flags;
+	u16			reserved1[3];
+	__be16			page_offset;
+	u8			log_eq_size;
+	u8			reserved2[4];
+	u8			eq_period;
+	u8			reserved3;
+	u8			eq_max_count;
+	u8			reserved4[3];
+	u8			intr;
+	u8			log_page_size;
+	u8			reserved5[2];
+	u8			mtt_base_addr_h;
+	__be32			mtt_base_addr_l;
+	u32			reserved6[2];
+	__be32			consumer_index;
+	__be32			producer_index;
+	u32			reserved7[4];
+};
+
+#define MLX4_EQ_STATUS_OK	   ( 0 << 28)
+#define MLX4_EQ_STATUS_WRITE_FAIL  (10 << 28)
+#define MLX4_EQ_OWNER_SW	   ( 0 << 24)
+#define MLX4_EQ_OWNER_HW	   ( 1 << 24)
+#define MLX4_EQ_FLAG_EC		   ( 1 << 18)
+#define MLX4_EQ_FLAG_OI		   ( 1 << 17)
+#define MLX4_EQ_STATE_ARMED	   ( 9 <<  8)
+#define MLX4_EQ_STATE_FIRED	   (10 <<  8)
+#define MLX4_EQ_STATE_ALWAYS_ARMED (11 <<  8)
+
+#define MLX4_ASYNC_EVENT_MASK ((1ull << MLX4_EVENT_TYPE_PATH_MIG)	    | \
+			       (1ull << MLX4_EVENT_TYPE_COMM_EST)	    | \
+			       (1ull << MLX4_EVENT_TYPE_SQ_DRAINED)	    | \
+			       (1ull << MLX4_EVENT_TYPE_CQ_ERROR)	    | \
+			       (1ull << MLX4_EVENT_TYPE_WQ_CATAS_ERROR)	    | \
+			       (1ull << MLX4_EVENT_TYPE_EEC_CATAS_ERROR)    | \
+			       (1ull << MLX4_EVENT_TYPE_PATH_MIG_FAILED)    | \
+			       (1ull << MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR) | \
+			       (1ull << MLX4_EVENT_TYPE_WQ_ACCESS_ERROR)    | \
+			       (1ull << MLX4_EVENT_TYPE_LOCAL_CATAS_ERROR)  | \
+			       (1ull << MLX4_EVENT_TYPE_PORT_CHANGE)	    | \
+			       (1ull << MLX4_EVENT_TYPE_ECC_DETECT)	    | \
+			       (1ull << MLX4_EVENT_TYPE_SRQ_CATAS_ERROR)    | \
+			       (1ull << MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE)    | \
+			       (1ull << MLX4_EVENT_TYPE_SRQ_LIMIT)	    | \
+			       (1ull << MLX4_EVENT_TYPE_CMD))
+#define MLX4_CATAS_EVENT_MASK  (1ull << MLX4_EVENT_TYPE_LOCAL_CATAS_ERROR)
+
+struct mlx4_eqe {
+	u8			reserved1;
+	u8			type;
+	u8			reserved2;
+	u8			subtype;
+	union {
+		u32		raw[6];
+		struct {
+			__be32	cqn;
+		} __attribute__((packed)) comp;
+		struct {
+			u16	reserved1;
+			__be16	token;
+			u32	reserved2;
+			u8	reserved3[3];
+			u8	status;
+			__be64	out_param;
+		} __attribute__((packed)) cmd;
+		struct {
+			__be32	qpn;
+		} __attribute__((packed)) qp;
+		struct {
+			__be32	srqn;
+		} __attribute__((packed)) srq;
+		struct {
+			__be32	cqn;
+			u32	reserved1;
+			u8	reserved2[3];
+			u8	syndrome;
+		} __attribute__((packed)) cq_err;
+		struct {
+			u32	reserved1[2];
+			__be32	port;
+		} __attribute__((packed)) port_change;
+	}			event;
+	u8			reserved3[3];
+	u8			owner;
+} __attribute__((packed));
+
+static void eq_set_ci(struct mlx4_eq *eq, int req_not)
+{
+	__raw_writel((__force u32) cpu_to_be32((eq->cons_index & 0xffffff) |
+					       req_not << 31),
+		     eq->doorbell);
+	/* We still want ordering, just not swabbing, so add a barrier */
+	mb();
+}
+
+static struct mlx4_eqe *get_eqe(struct mlx4_eq *eq, u32 entry)
+{
+	unsigned long off = (entry & (eq->nent - 1)) * MLX4_EQ_ENTRY_SIZE;
+	return eq->page_list[off / PAGE_SIZE].buf + off % PAGE_SIZE;
+}
+
+static struct mlx4_eqe *next_eqe_sw(struct mlx4_eq *eq)
+{
+	struct mlx4_eqe *eqe = get_eqe(eq, eq->cons_index);
+	return !!(eqe->owner & 0x80) ^ !!(eq->cons_index & eq->nent) ? NULL : eqe;
+}
+
+static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
+{
+	struct mlx4_eqe *eqe;
+	int cqn;
+	int eqes_found = 0;
+	int set_ci = 0;
+
+	while ((eqe = next_eqe_sw(eq))) {
+		/*
+		 * Make sure we read EQ entry contents after we've
+		 * checked the ownership bit.
+		 */
+		rmb();
+
+		switch (eqe->type) {
+		case MLX4_EVENT_TYPE_COMP:
+			cqn = be32_to_cpu(eqe->event.comp.cqn) & 0xffffff;
+			mlx4_cq_completion(dev, cqn);
+			break;
+
+		case MLX4_EVENT_TYPE_PATH_MIG:
+		case MLX4_EVENT_TYPE_COMM_EST:
+		case MLX4_EVENT_TYPE_SQ_DRAINED:
+		case MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE:
+		case MLX4_EVENT_TYPE_WQ_CATAS_ERROR:
+		case MLX4_EVENT_TYPE_PATH_MIG_FAILED:
+		case MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR:
+		case MLX4_EVENT_TYPE_WQ_ACCESS_ERROR:
+			mlx4_qp_event(dev, be32_to_cpu(eqe->event.qp.qpn) & 0xffffff,
+				      eqe->type);
+			break;
+
+		case MLX4_EVENT_TYPE_SRQ_LIMIT:
+		case MLX4_EVENT_TYPE_SRQ_CATAS_ERROR:
+			mlx4_srq_event(dev, be32_to_cpu(eqe->event.srq.srqn) & 0xffffff,
+				      eqe->type);
+			break;
+
+		case MLX4_EVENT_TYPE_CMD:
+			mlx4_cmd_event(dev,
+				       be16_to_cpu(eqe->event.cmd.token),
+				       eqe->event.cmd.status,
+				       be64_to_cpu(eqe->event.cmd.out_param));
+			break;
+
+		case MLX4_EVENT_TYPE_PORT_CHANGE:
+			mlx4_dispatch_event(dev, eqe->type, eqe->subtype,
+					    be32_to_cpu(eqe->event.port_change.port) >> 28);
+			break;
+
+		case MLX4_EVENT_TYPE_CQ_ERROR:
+			mlx4_warn(dev, "CQ %s on CQN %06x\n",
+				  eqe->event.cq_err.syndrome == 1 ?
+				  "overrun" : "access violation",
+				  be32_to_cpu(eqe->event.cq_err.cqn) & 0xffffff);
+			mlx4_cq_event(dev, be32_to_cpu(eqe->event.cq_err.cqn),
+				      eqe->type);
+			break;
+
+		case MLX4_EVENT_TYPE_EQ_OVERFLOW:
+			mlx4_warn(dev, "EQ overrun on EQN %d\n", eq->eqn);
+			break;
+
+		case MLX4_EVENT_TYPE_EEC_CATAS_ERROR:
+		case MLX4_EVENT_TYPE_ECC_DETECT:
+		default:
+			mlx4_warn(dev, "Unhandled event %02x(%02x) on EQ %d at index %u\n",
+				  eqe->type, eqe->subtype, eq->eqn, eq->cons_index);
+			break;
+		};
+
+		++eq->cons_index;
+		eqes_found = 1;
+		++set_ci;
+
+		/*
+		 * The HCA will think the queue has overflowed if we
+		 * don't tell it we've been processing events.  We
+		 * create our EQs with MLX4_NUM_SPARE_EQE extra
+		 * entries, so we must update our consumer index at
+		 * least that often.
+		 */
+		if (unlikely(set_ci >= MLX4_NUM_SPARE_EQE)) {
+			/*
+			 * Conditional on hca_type is OK here because
+			 * this is a rare case, not the fast path.
+			 */
+			eq_set_ci(eq, 0);
+			set_ci = 0;
+		}
+	}
+
+	eq_set_ci(eq, 1);
+
+	return eqes_found;
+}
+
+static irqreturn_t mlx4_interrupt(int irq, void *dev_ptr)
+{
+	struct mlx4_dev *dev = dev_ptr;
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int work = 0;
+	int i;
+
+	writel(priv->eq_table.clr_mask, priv->eq_table.clr_int);
+
+	for (i = 0; i < MLX4_EQ_CATAS; ++i)
+		work |= mlx4_eq_int(dev, &priv->eq_table.eq[i]);
+
+	return IRQ_RETVAL(work);
+}
+
+static irqreturn_t mlx4_msi_x_interrupt(int irq, void *eq_ptr)
+{
+	struct mlx4_eq  *eq  = eq_ptr;
+	struct mlx4_dev *dev = eq->dev;
+
+	mlx4_eq_int(dev, eq);
+
+	/* MSI-X vectors always belong to us */
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mlx4_catas_interrupt(int irq, void *dev_ptr)
+{
+	mlx4_handle_catas_err(dev_ptr);
+
+	/* MSI-X vectors always belong to us */
+	return IRQ_HANDLED;
+}
+
+static int mlx4_MAP_EQ(struct mlx4_dev *dev, u64 event_mask, int unmap,
+			int eq_num)
+{
+	return mlx4_cmd(dev, event_mask, (unmap << 31) | eq_num,
+			0, MLX4_CMD_MAP_EQ, MLX4_CMD_TIME_CLASS_B);
+}
+
+static int mlx4_SW2HW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+			 int eq_num)
+{
+	return mlx4_cmd(dev, mailbox->dma, eq_num, 0, MLX4_CMD_SW2HW_EQ,
+			MLX4_CMD_TIME_CLASS_A);
+}
+
+static int mlx4_HW2SW_EQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+			 int eq_num)
+{
+	return mlx4_cmd_box(dev, 0, mailbox->dma, eq_num, 0, MLX4_CMD_HW2SW_EQ,
+			    MLX4_CMD_TIME_CLASS_A);
+}
+
+static void __devinit __iomem *mlx4_get_eq_uar(struct mlx4_dev *dev,
+					       struct mlx4_eq *eq)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int index;
+
+	index = eq->eqn / 4 - dev->caps.reserved_eqs / 4;
+
+	if (!priv->eq_table.uar_map[index]) {
+		priv->eq_table.uar_map[index] =
+			ioremap(pci_resource_start(dev->pdev, 2) +
+				((eq->eqn / 4) << PAGE_SHIFT),
+				PAGE_SIZE);
+		if (!priv->eq_table.uar_map[index]) {
+			mlx4_err(dev, "Couldn't map EQ doorbell for EQN 0x%06x\n",
+				 eq->eqn);
+			return NULL;
+		}
+	}
+
+	return priv->eq_table.uar_map[index] + 0x800 + 8 * (eq->eqn % 4);
+}
+
+static int __devinit mlx4_create_eq(struct mlx4_dev *dev, int nent,
+				    u8 intr, struct mlx4_eq *eq)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_cmd_mailbox *mailbox;
+	struct mlx4_eq_context *eq_context;
+	int npages;
+	u64 *dma_list = NULL;
+	dma_addr_t t;
+	u64 mtt_addr;
+	int err = -ENOMEM;
+	int i;
+
+	eq->dev   = dev;
+	eq->nent  = roundup_pow_of_two(max(nent, 2));
+	npages = PAGE_ALIGN(eq->nent * MLX4_EQ_ENTRY_SIZE) / PAGE_SIZE;
+
+	eq->page_list = kmalloc(npages * sizeof *eq->page_list,
+				GFP_KERNEL);
+	if (!eq->page_list)
+		goto err_out;
+
+	for (i = 0; i < npages; ++i)
+		eq->page_list[i].buf = NULL;
+
+	dma_list = kmalloc(npages * sizeof *dma_list, GFP_KERNEL);
+	if (!dma_list)
+		goto err_out_free;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		goto err_out_free;
+	eq_context = mailbox->buf;
+
+	for (i = 0; i < npages; ++i) {
+		eq->page_list[i].buf = dma_alloc_coherent(&dev->pdev->dev,
+							  PAGE_SIZE, &t, GFP_KERNEL);
+		if (!eq->page_list[i].buf)
+			goto err_out_free_pages;
+
+		dma_list[i] = t;
+		eq->page_list[i].map = t;
+
+		memset(eq->page_list[i].buf, 0, PAGE_SIZE);
+	}
+
+	eq->eqn = mlx4_bitmap_alloc(&priv->eq_table.bitmap);
+	if (eq->eqn == -1)
+		goto err_out_free_pages;
+
+	eq->doorbell = mlx4_get_eq_uar(dev, eq);
+	if (!eq->doorbell) {
+		err = -ENOMEM;
+		goto err_out_free_eq;
+	}
+
+	err = mlx4_mtt_init(dev, npages, PAGE_SHIFT, &eq->mtt);
+	if (err)
+		goto err_out_free_eq;
+
+	err = mlx4_write_mtt(dev, &eq->mtt, 0, npages, dma_list);
+	if (err)
+		goto err_out_free_mtt;
+
+	memset(eq_context, 0, sizeof *eq_context);
+	eq_context->flags	  = cpu_to_be32(MLX4_EQ_STATUS_OK   |
+						MLX4_EQ_STATE_ARMED);
+	eq_context->log_eq_size	  = ilog2(eq->nent);
+	eq_context->intr	  = intr;
+	eq_context->log_page_size = PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT;
+
+	mtt_addr = mlx4_mtt_addr(dev, &eq->mtt);
+	eq_context->mtt_base_addr_h = mtt_addr >> 32;
+	eq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
+
+	err = mlx4_SW2HW_EQ(dev, mailbox, eq->eqn);
+	if (err) {
+		mlx4_warn(dev, "SW2HW_EQ failed (%d)\n", err);
+		goto err_out_free_mtt;
+	}
+
+	kfree(dma_list);
+	mlx4_free_cmd_mailbox(dev, mailbox);
+
+	eq->cons_index = 0;
+
+	return err;
+
+err_out_free_mtt:
+	mlx4_mtt_cleanup(dev, &eq->mtt);
+
+err_out_free_eq:
+	mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn);
+
+err_out_free_pages:
+	for (i = 0; i < npages; ++i)
+		if (eq->page_list[i].buf)
+			dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
+					  eq->page_list[i].buf,
+					  eq->page_list[i].map);
+
+	mlx4_free_cmd_mailbox(dev, mailbox);
+
+err_out_free:
+	kfree(eq->page_list);
+	kfree(dma_list);
+
+err_out:
+	return err;
+}
+
+static void mlx4_free_eq(struct mlx4_dev *dev,
+			 struct mlx4_eq *eq)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_cmd_mailbox *mailbox;
+	int err;
+	int npages = PAGE_ALIGN(MLX4_EQ_ENTRY_SIZE * eq->nent) / PAGE_SIZE;
+	int i;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return;
+
+	err = mlx4_HW2SW_EQ(dev, mailbox, eq->eqn);
+	if (err)
+		mlx4_warn(dev, "HW2SW_EQ failed (%d)\n", err);
+
+	if (0) {
+		mlx4_dbg(dev, "Dumping EQ context %02x:\n", eq->eqn);
+		for (i = 0; i < sizeof (struct mlx4_eq_context) / 4; ++i) {
+			if (i % 4 == 0)
+				printk("[%02x] ", i * 4);
+			printk(" %08x", be32_to_cpup(mailbox->buf + i * 4));
+			if ((i + 1) % 4 == 0)
+				printk("\n");
+		}
+	}
+
+	mlx4_mtt_cleanup(dev, &eq->mtt);
+	for (i = 0; i < npages; ++i)
+		pci_free_consistent(dev->pdev, PAGE_SIZE,
+				    eq->page_list[i].buf,
+				    eq->page_list[i].map);
+
+	kfree(eq->page_list);
+	mlx4_bitmap_free(&priv->eq_table.bitmap, eq->eqn);
+	mlx4_free_cmd_mailbox(dev, mailbox);
+}
+
+static void mlx4_free_irqs(struct mlx4_dev *dev)
+{
+	struct mlx4_eq_table *eq_table = &mlx4_priv(dev)->eq_table;
+	int i;
+
+	if (eq_table->have_irq)
+		free_irq(dev->pdev->irq, dev);
+	for (i = 0; i < MLX4_NUM_EQ; ++i)
+		if (eq_table->eq[i].have_irq)
+			free_irq(eq_table->eq[i].irq, eq_table->eq + i);
+}
+
+static int __devinit mlx4_map_clr_int(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+
+	priv->clr_base = ioremap(pci_resource_start(dev->pdev, priv->fw.clr_int_bar) +
+				 priv->fw.clr_int_base, MLX4_CLR_INT_SIZE);
+	if (!priv->clr_base) {
+		mlx4_err(dev, "Couldn't map interrupt clear register, aborting.\n");
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void mlx4_unmap_clr_int(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+
+	iounmap(priv->clr_base);
+}
+
+int __devinit mlx4_map_eq_icm(struct mlx4_dev *dev, u64 icm_virt)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int ret;
+
+	/*
+	 * We assume that mapping one page is enough for the whole EQ
+	 * context table.  This is fine with all current HCAs, because
+	 * we only use 32 EQs and each EQ uses 64 bytes of context
+	 * memory, or 1 KB total.
+	 */
+	priv->eq_table.icm_virt = icm_virt;
+	priv->eq_table.icm_page = alloc_page(GFP_HIGHUSER);
+	if (!priv->eq_table.icm_page)
+		return -ENOMEM;
+	priv->eq_table.icm_dma  = pci_map_page(dev->pdev, priv->eq_table.icm_page, 0,
+					       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+	if (pci_dma_mapping_error(priv->eq_table.icm_dma)) {
+		__free_page(priv->eq_table.icm_page);
+		return -ENOMEM;
+	}
+
+	ret = mlx4_MAP_ICM_page(dev, priv->eq_table.icm_dma, icm_virt);
+	if (ret) {
+		pci_unmap_page(dev->pdev, priv->eq_table.icm_dma, PAGE_SIZE,
+			       PCI_DMA_BIDIRECTIONAL);
+		__free_page(priv->eq_table.icm_page);
+	}
+
+	return ret;
+}
+
+void mlx4_unmap_eq_icm(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+
+	mlx4_UNMAP_ICM(dev, priv->eq_table.icm_virt, 1);
+	pci_unmap_page(dev->pdev, priv->eq_table.icm_dma, PAGE_SIZE,
+		       PCI_DMA_BIDIRECTIONAL);
+	__free_page(priv->eq_table.icm_page);
+}
+
+int __devinit mlx4_init_eq_table(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int err;
+	int i;
+
+	err = mlx4_bitmap_init(&priv->eq_table.bitmap, dev->caps.num_eqs,
+			       dev->caps.num_eqs - 1, dev->caps.reserved_eqs);
+	if (err)
+		return err;
+
+	for (i = 0; i < ARRAY_SIZE(priv->eq_table.uar_map); ++i)
+		priv->eq_table.uar_map[i] = NULL;
+
+	err = mlx4_map_clr_int(dev);
+	if (err)
+		goto err_out_free;
+
+	priv->eq_table.clr_mask =
+		swab32(1 << (priv->eq_table.inta_pin & 31));
+	priv->eq_table.clr_int  = priv->clr_base +
+		(priv->eq_table.inta_pin < 32 ? 4 : 0);
+
+	err = mlx4_create_eq(dev, dev->caps.num_cqs + MLX4_NUM_SPARE_EQE,
+			     (dev->flags & MLX4_FLAG_MSI_X) ? MLX4_EQ_COMP : 0,
+			     &priv->eq_table.eq[MLX4_EQ_COMP]);
+	if (err)
+		goto err_out_unmap;
+
+	err = mlx4_create_eq(dev, MLX4_NUM_ASYNC_EQE + MLX4_NUM_SPARE_EQE,
+			     (dev->flags & MLX4_FLAG_MSI_X) ? MLX4_EQ_ASYNC : 0,
+			     &priv->eq_table.eq[MLX4_EQ_ASYNC]);
+	if (err)
+		goto err_out_comp;
+
+	if (dev->flags & MLX4_FLAG_MSI_X) {
+		static const char *eq_name[] = {
+			[MLX4_EQ_COMP]  = DRV_NAME " (comp)",
+			[MLX4_EQ_ASYNC] = DRV_NAME " (async)",
+			[MLX4_EQ_CATAS] = DRV_NAME " (catas)"
+		};
+
+		err = mlx4_create_eq(dev, 1, MLX4_EQ_CATAS,
+				     &priv->eq_table.eq[MLX4_EQ_CATAS]);
+		if (err)
+			goto err_out_async;
+
+		for (i = 0; i < MLX4_EQ_CATAS; ++i) {
+			err = request_irq(priv->eq_table.eq[i].irq,
+					  mlx4_msi_x_interrupt,
+					  0, eq_name[i], priv->eq_table.eq + i);
+			if (err)
+				goto err_out_catas;
+
+			priv->eq_table.eq[i].have_irq = 1;
+		}
+
+		err = request_irq(priv->eq_table.eq[MLX4_EQ_CATAS].irq,
+				  mlx4_catas_interrupt, 0,
+				  eq_name[MLX4_EQ_CATAS], dev);
+		if (err)
+			goto err_out_catas;
+
+		priv->eq_table.eq[MLX4_EQ_CATAS].have_irq = 1;
+	} else {
+		err = request_irq(dev->pdev->irq, mlx4_interrupt,
+				  SA_SHIRQ, DRV_NAME, dev);
+		if (err)
+			goto err_out_async;
+
+		priv->eq_table.have_irq = 1;
+	}
+
+	err = mlx4_MAP_EQ(dev, MLX4_ASYNC_EVENT_MASK, 0,
+			  priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
+	if (err)
+		mlx4_warn(dev, "MAP_EQ for async EQ %d failed (%d)\n",
+			   priv->eq_table.eq[MLX4_EQ_ASYNC].eqn, err);
+
+	for (i = 0; i < MLX4_EQ_CATAS; ++i)
+		eq_set_ci(&priv->eq_table.eq[i], 1);
+
+	if (dev->flags & MLX4_FLAG_MSI_X) {
+		err = mlx4_MAP_EQ(dev, MLX4_CATAS_EVENT_MASK, 0,
+				  priv->eq_table.eq[MLX4_EQ_CATAS].eqn);
+		if (err)
+			mlx4_warn(dev, "MAP_EQ for catas EQ %d failed (%d)\n",
+				  priv->eq_table.eq[MLX4_EQ_CATAS].eqn, err);
+	}
+
+	return 0;
+
+err_out_catas:
+	mlx4_free_eq(dev, &priv->eq_table.eq[MLX4_EQ_CATAS]);
+
+err_out_async:
+	mlx4_free_eq(dev, &priv->eq_table.eq[MLX4_EQ_ASYNC]);
+
+err_out_comp:
+	mlx4_free_eq(dev, &priv->eq_table.eq[MLX4_EQ_COMP]);
+
+err_out_unmap:
+	mlx4_unmap_clr_int(dev);
+	mlx4_free_irqs(dev);
+
+err_out_free:
+	mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
+	return err;
+}
+
+void mlx4_cleanup_eq_table(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int i;
+
+	if (dev->flags & MLX4_FLAG_MSI_X)
+		mlx4_MAP_EQ(dev, MLX4_CATAS_EVENT_MASK, 1,
+			    priv->eq_table.eq[MLX4_EQ_CATAS].eqn);
+
+	mlx4_MAP_EQ(dev, MLX4_ASYNC_EVENT_MASK, 1,
+		    priv->eq_table.eq[MLX4_EQ_ASYNC].eqn);
+
+	mlx4_free_irqs(dev);
+
+	for (i = 0; i < MLX4_EQ_CATAS; ++i)
+		mlx4_free_eq(dev, &priv->eq_table.eq[i]);
+	if (dev->flags & MLX4_FLAG_MSI_X)
+		mlx4_free_eq(dev, &priv->eq_table.eq[MLX4_EQ_CATAS]);
+
+	mlx4_unmap_clr_int(dev);
+
+	for (i = 0; i < ARRAY_SIZE(priv->eq_table.uar_map); ++i)
+		if (priv->eq_table.uar_map[i])
+			iounmap(priv->eq_table.uar_map[i]);
+
+	mlx4_bitmap_cleanup(&priv->eq_table.bitmap);
+}

drivers/net/mlx4/fw.c

+/*
+ * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/mlx4/cmd.h>
+
+#include "fw.h"
+#include "icm.h"
+
+extern void __buggy_use_of_MLX4_GET(void);
+extern void __buggy_use_of_MLX4_PUT(void);
+
+#define MLX4_GET(dest, source, offset)				      \
+	do {							      \
+		void *__p = (char *) (source) + (offset);	      \
+		switch (sizeof (dest)) {			      \
+		case 1: (dest) = *(u8 *) __p;	    break;	      \
+		case 2: (dest) = be16_to_cpup(__p); break;	      \
+		case 4: (dest) = be32_to_cpup(__p); break;	      \
+		case 8: (dest) = be64_to_cpup(__p); break;	      \
+		default: __buggy_use_of_MLX4_GET();		      \
+		}						      \
+	} while (0)
+
+#define MLX4_PUT(dest, source, offset)				      \
+	do {							      \
+		void *__d = ((char *) (dest) + (offset));	      \
+		switch (sizeof(source)) {			      \
+		case 1: *(u8 *) __d = (source);		       break; \
+		case 2:	*(__be16 *) __d = cpu_to_be16(source); break; \
+		case 4:	*(__be32 *) __d = cpu_to_be32(source); break; \
+		case 8:	*(__be64 *) __d = cpu_to_be64(source); break; \
+		default: __buggy_use_of_MLX4_PUT();		      \
+		}						      \
+	} while (0)
+
+static void dump_dev_cap_flags(struct mlx4_dev *dev, u32 flags)
+{
+	static const char *fname[] = {
+		[ 0] = "RC transport",
+		[ 1] = "UC transport",
+		[ 2] = "UD transport",
+		[ 3] = "SRC transport",
+		[ 4] = "reliable multicast",
+		[ 5] = "FCoIB support",
+		[ 6] = "SRQ support",
+		[ 7] = "IPoIB checksum offload",
+		[ 8] = "P_Key violation counter",
+		[ 9] = "Q_Key violation counter",
+		[10] = "VMM",
+		[16] = "MW support",
+		[17] = "APM support",
+		[18] = "Atomic ops support",
+		[19] = "Raw multicast support",
+		[20] = "Address vector port checking support",
+		[21] = "UD multicast support",
+		[24] = "Demand paging support",
+		[25] = "Router support"
+	};
+	int i;
+
+	mlx4_dbg(dev, "DEV_CAP flags:\n");
+	for (i = 0; i < 32; ++i)
+		if (fname[i] && (flags & (1 << i)))
+			mlx4_dbg(dev, "    %s\n", fname[i]);
+}
+
+int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+	u32 *outbox;
+	u8 field;
+	u16 size;
+	u16 stat_rate;
+	int err;
+
+#define QUERY_DEV_CAP_OUT_SIZE		       0x100
+#define QUERY_DEV_CAP_MAX_SRQ_SZ_OFFSET		0x10
+#define QUERY_DEV_CAP_MAX_QP_SZ_OFFSET		0x11
+#define QUERY_DEV_CAP_RSVD_QP_OFFSET		0x12
+#define QUERY_DEV_CAP_MAX_QP_OFFSET		0x13
+#define QUERY_DEV_CAP_RSVD_SRQ_OFFSET		0x14
+#define QUERY_DEV_CAP_MAX_SRQ_OFFSET		0x15
+#define QUERY_DEV_CAP_RSVD_EEC_OFFSET		0x16
+#define QUERY_DEV_CAP_MAX_EEC_OFFSET		0x17
+#define QUERY_DEV_CAP_MAX_CQ_SZ_OFFSET		0x19
+#define QUERY_DEV_CAP_RSVD_CQ_OFFSET		0x1a
+#define QUERY_DEV_CAP_MAX_CQ_OFFSET		0x1b
+#define QUERY_DEV_CAP_MAX_MPT_OFFSET		0x1d
+#define QUERY_DEV_CAP_RSVD_EQ_OFFSET		0x1e
+#define QUERY_DEV_CAP_MAX_EQ_OFFSET		0x1f
+#define QUERY_DEV_CAP_RSVD_MTT_OFFSET		0x20
+#define QUERY_DEV_CAP_MAX_MRW_SZ_OFFSET		0x21
+#define QUERY_DEV_CAP_RSVD_MRW_OFFSET		0x22
+#define QUERY_DEV_CAP_MAX_MTT_SEG_OFFSET	0x23
+#define QUERY_DEV_CAP_MAX_AV_OFFSET		0x27
+#define QUERY_DEV_CAP_MAX_REQ_QP_OFFSET		0x29
+#define QUERY_DEV_CAP_MAX_RES_QP_OFFSET		0x2b
+#define QUERY_DEV_CAP_MAX_RDMA_OFFSET		0x2f
+#define QUERY_DEV_CAP_RSZ_SRQ_OFFSET		0x33
+#define QUERY_DEV_CAP_ACK_DELAY_OFFSET		0x35
+#define QUERY_DEV_CAP_MTU_WIDTH_OFFSET		0x36
+#define QUERY_DEV_CAP_VL_PORT_OFFSET		0x37
+#define QUERY_DEV_CAP_MAX_GID_OFFSET		0x3b
+#define QUERY_DEV_CAP_RATE_SUPPORT_OFFSET	0x3c
+#define QUERY_DEV_CAP_MAX_PKEY_OFFSET		0x3f
+#define QUERY_DEV_CAP_FLAGS_OFFSET		0x44
+#define QUERY_DEV_CAP_RSVD_UAR_OFFSET		0x48
+#define QUERY_DEV_CAP_UAR_SZ_OFFSET		0x49
+#define QUERY_DEV_CAP_PAGE_SZ_OFFSET		0x4b
+#define QUERY_DEV_CAP_BF_OFFSET			0x4c
+#define QUERY_DEV_CAP_LOG_BF_REG_SZ_OFFSET	0x4d
+#define QUERY_DEV_CAP_LOG_MAX_BF_REGS_PER_PAGE_OFFSET	0x4e
+#define QUERY_DEV_CAP_LOG_MAX_BF_PAGES_OFFSET	0x4f
+#define QUERY_DEV_CAP_MAX_SG_SQ_OFFSET		0x51
+#define QUERY_DEV_CAP_MAX_DESC_SZ_SQ_OFFSET	0x52
+#define QUERY_DEV_CAP_MAX_SG_RQ_OFFSET		0x55
+#define QUERY_DEV_CAP_MAX_DESC_SZ_RQ_OFFSET	0x56
+#define QUERY_DEV_CAP_MAX_QP_MCG_OFFSET		0x61
+#define QUERY_DEV_CAP_RSVD_MCG_OFFSET		0x62
+#define QUERY_DEV_CAP_MAX_MCG_OFFSET		0x63
+#define QUERY_DEV_CAP_RSVD_PD_OFFSET		0x64
+#define QUERY_DEV_CAP_MAX_PD_OFFSET		0x65
+#define QUERY_DEV_CAP_RDMARC_ENTRY_SZ_OFFSET	0x80
+#define QUERY_DEV_CAP_QPC_ENTRY_SZ_OFFSET	0x82
+#define QUERY_DEV_CAP_AUX_ENTRY_SZ_OFFSET	0x84
+#define QUERY_DEV_CAP_ALTC_ENTRY_SZ_OFFSET	0x86
+#define QUERY_DEV_CAP_EQC_ENTRY_SZ_OFFSET	0x88
+#define QUERY_DEV_CAP_CQC_ENTRY_SZ_OFFSET	0x8a
+#define QUERY_DEV_CAP_SRQ_ENTRY_SZ_OFFSET	0x8c
+#define QUERY_DEV_CAP_C_MPT_ENTRY_SZ_OFFSET	0x8e
+#define QUERY_DEV_CAP_MTT_ENTRY_SZ_OFFSET	0x90
+#define QUERY_DEV_CAP_D_MPT_ENTRY_SZ_OFFSET	0x92
+#define QUERY_DEV_CAP_BMME_FLAGS_OFFSET		0x97
+#define QUERY_DEV_CAP_RSVD_LKEY_OFFSET		0x98
+#define QUERY_DEV_CAP_MAX_ICM_SZ_OFFSET		0xa0
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+	outbox = mailbox->buf;
+
+	err = mlx4_cmd_box(dev, 0, mailbox->dma, 0, 0, MLX4_CMD_QUERY_DEV_CAP,
+			   MLX4_CMD_TIME_CLASS_A);
+
+	if (err)
+		goto out;
+
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_QP_OFFSET);
+	dev_cap->reserved_qps = 1 << (field & 0xf);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_QP_OFFSET);
+	dev_cap->max_qps = 1 << (field & 0x1f);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_SRQ_OFFSET);
+	dev_cap->reserved_srqs = 1 << (field >> 4);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_SRQ_OFFSET);
+	dev_cap->max_srqs = 1 << (field & 0x1f);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_CQ_SZ_OFFSET);
+	dev_cap->max_cq_sz = 1 << field;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_CQ_OFFSET);
+	dev_cap->reserved_cqs = 1 << (field & 0xf);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_CQ_OFFSET);
+	dev_cap->max_cqs = 1 << (field & 0x1f);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MPT_OFFSET);
+	dev_cap->max_mpts = 1 << (field & 0x3f);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_EQ_OFFSET);
+	dev_cap->reserved_eqs = 1 << (field & 0xf);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_EQ_OFFSET);
+	dev_cap->max_eqs = 1 << (field & 0x7);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_MTT_OFFSET);
+	dev_cap->reserved_mtts = 1 << (field >> 4);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MRW_SZ_OFFSET);
+	dev_cap->max_mrw_sz = 1 << field;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_MRW_OFFSET);
+	dev_cap->reserved_mrws = 1 << (field & 0xf);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MTT_SEG_OFFSET);
+	dev_cap->max_mtt_seg = 1 << (field & 0x3f);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_REQ_QP_OFFSET);
+	dev_cap->max_requester_per_qp = 1 << (field & 0x3f);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_RES_QP_OFFSET);
+	dev_cap->max_responder_per_qp = 1 << (field & 0x3f);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_RDMA_OFFSET);
+	dev_cap->max_rdma_global = 1 << (field & 0x3f);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_ACK_DELAY_OFFSET);
+	dev_cap->local_ca_ack_delay = field & 0x1f;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MTU_WIDTH_OFFSET);
+	dev_cap->max_mtu	= field >> 4;
+	dev_cap->max_port_width = field & 0xf;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_VL_PORT_OFFSET);
+	dev_cap->max_vl    = field >> 4;
+	dev_cap->num_ports = field & 0xf;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_GID_OFFSET);
+	dev_cap->max_gids = 1 << (field & 0xf);
+	MLX4_GET(stat_rate, outbox, QUERY_DEV_CAP_RATE_SUPPORT_OFFSET);
+	dev_cap->stat_rate_support = stat_rate;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_PKEY_OFFSET);
+	dev_cap->max_pkeys = 1 << (field & 0xf);
+	MLX4_GET(dev_cap->flags, outbox, QUERY_DEV_CAP_FLAGS_OFFSET);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_UAR_OFFSET);
+	dev_cap->reserved_uars = field >> 4;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_UAR_SZ_OFFSET);
+	dev_cap->uar_size = 1 << ((field & 0x3f) + 20);
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_PAGE_SZ_OFFSET);
+	dev_cap->min_page_sz = 1 << field;
+
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_BF_OFFSET);
+	if (field & 0x80) {
+		MLX4_GET(field, outbox, QUERY_DEV_CAP_LOG_BF_REG_SZ_OFFSET);
+		dev_cap->bf_reg_size = 1 << (field & 0x1f);
+		MLX4_GET(field, outbox, QUERY_DEV_CAP_LOG_MAX_BF_REGS_PER_PAGE_OFFSET);
+		dev_cap->bf_regs_per_page = 1 << (field & 0x3f);
+		mlx4_dbg(dev, "BlueFlame available (reg size %d, regs/page %d)\n",
+			 dev_cap->bf_reg_size, dev_cap->bf_regs_per_page);
+	} else {
+		dev_cap->bf_reg_size = 0;
+		mlx4_dbg(dev, "BlueFlame not available\n");
+	}
+
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_SG_SQ_OFFSET);
+	dev_cap->max_sq_sg = field;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_MAX_DESC_SZ_SQ_OFFSET);
+	dev_cap->max_sq_desc_sz = size;
+
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_QP_MCG_OFFSET);
+	dev_cap->max_qp_per_mcg = 1 << field;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_MCG_OFFSET);
+	dev_cap->reserved_mgms = field & 0xf;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MCG_OFFSET);
+	dev_cap->max_mcgs = 1 << field;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_RSVD_PD_OFFSET);
+	dev_cap->reserved_pds = field >> 4;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_PD_OFFSET);
+	dev_cap->max_pds = 1 << (field & 0x3f);
+
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_RDMARC_ENTRY_SZ_OFFSET);
+	dev_cap->rdmarc_entry_sz = size;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_QPC_ENTRY_SZ_OFFSET);
+	dev_cap->qpc_entry_sz = size;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_AUX_ENTRY_SZ_OFFSET);
+	dev_cap->aux_entry_sz = size;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_ALTC_ENTRY_SZ_OFFSET);
+	dev_cap->altc_entry_sz = size;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_EQC_ENTRY_SZ_OFFSET);
+	dev_cap->eqc_entry_sz = size;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_CQC_ENTRY_SZ_OFFSET);
+	dev_cap->cqc_entry_sz = size;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_SRQ_ENTRY_SZ_OFFSET);
+	dev_cap->srq_entry_sz = size;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_C_MPT_ENTRY_SZ_OFFSET);
+	dev_cap->cmpt_entry_sz = size;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_MTT_ENTRY_SZ_OFFSET);
+	dev_cap->mtt_entry_sz = size;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_D_MPT_ENTRY_SZ_OFFSET);
+	dev_cap->dmpt_entry_sz = size;
+
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_SRQ_SZ_OFFSET);
+	dev_cap->max_srq_sz = 1 << field;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_QP_SZ_OFFSET);
+	dev_cap->max_qp_sz = 1 << field;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_RSZ_SRQ_OFFSET);
+	dev_cap->resize_srq = field & 1;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_SG_RQ_OFFSET);
+	dev_cap->max_rq_sg = field;
+	MLX4_GET(size, outbox, QUERY_DEV_CAP_MAX_DESC_SZ_RQ_OFFSET);
+	dev_cap->max_rq_desc_sz = size;
+
+	MLX4_GET(dev_cap->bmme_flags, outbox,
+		 QUERY_DEV_CAP_BMME_FLAGS_OFFSET);
+	MLX4_GET(dev_cap->reserved_lkey, outbox,
+		 QUERY_DEV_CAP_RSVD_LKEY_OFFSET);
+	MLX4_GET(dev_cap->max_icm_sz, outbox,
+		 QUERY_DEV_CAP_MAX_ICM_SZ_OFFSET);
+
+	if (dev_cap->bmme_flags & 1)
+		mlx4_dbg(dev, "Base MM extensions: yes "
+			 "(flags %d, rsvd L_Key %08x)\n",
+			 dev_cap->bmme_flags, dev_cap->reserved_lkey);
+	else
+		mlx4_dbg(dev, "Base MM extensions: no\n");
+
+	/*
+	 * Each UAR has 4 EQ doorbells; so if a UAR is reserved, then
+	 * we can't use any EQs whose doorbell falls on that page,
+	 * even if the EQ itself isn't reserved.
+	 */
+	dev_cap->reserved_eqs = max(dev_cap->reserved_uars * 4,
+				    dev_cap->reserved_eqs);
+
+	mlx4_dbg(dev, "Max ICM size %lld MB\n",
+		 (unsigned long long) dev_cap->max_icm_sz >> 20);
+	mlx4_dbg(dev, "Max QPs: %d, reserved QPs: %d, entry size: %d\n",
+		 dev_cap->max_qps, dev_cap->reserved_qps, dev_cap->qpc_entry_sz);
+	mlx4_dbg(dev, "Max SRQs: %d, reserved SRQs: %d, entry size: %d\n",
+		 dev_cap->max_srqs, dev_cap->reserved_srqs, dev_cap->srq_entry_sz);
+	mlx4_dbg(dev, "Max CQs: %d, reserved CQs: %d, entry size: %d\n",
+		 dev_cap->max_cqs, dev_cap->reserved_cqs, dev_cap->cqc_entry_sz);
+	mlx4_dbg(dev, "Max EQs: %d, reserved EQs: %d, entry size: %d\n",
+		 dev_cap->max_eqs, dev_cap->reserved_eqs, dev_cap->eqc_entry_sz);
+	mlx4_dbg(dev, "reserved MPTs: %d, reserved MTTs: %d\n",
+		 dev_cap->reserved_mrws, dev_cap->reserved_mtts);
+	mlx4_dbg(dev, "Max PDs: %d, reserved PDs: %d, reserved UARs: %d\n",
+		 dev_cap->max_pds, dev_cap->reserved_pds, dev_cap->reserved_uars);
+	mlx4_dbg(dev, "Max QP/MCG: %d, reserved MGMs: %d\n",
+		 dev_cap->max_pds, dev_cap->reserved_mgms);
+	mlx4_dbg(dev, "Max CQEs: %d, max WQEs: %d, max SRQ WQEs: %d\n",
+		 dev_cap->max_cq_sz, dev_cap->max_qp_sz, dev_cap->max_srq_sz);
+	mlx4_dbg(dev, "Local CA ACK delay: %d, max MTU: %d, port width cap: %d\n",
+		 dev_cap->local_ca_ack_delay, 128 << dev_cap->max_mtu,
+		 dev_cap->max_port_width);
+	mlx4_dbg(dev, "Max SQ desc size: %d, max SQ S/G: %d\n",
+		 dev_cap->max_sq_desc_sz, dev_cap->max_sq_sg);
+	mlx4_dbg(dev, "Max RQ desc size: %d, max RQ S/G: %d\n",
+		 dev_cap->max_rq_desc_sz, dev_cap->max_rq_sg);
+
+	dump_dev_cap_flags(dev, dev_cap->flags);
+
+out:
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	return err;
+}
+
+int mlx4_map_cmd(struct mlx4_dev *dev, u16 op, struct mlx4_icm *icm, u64 virt)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+	struct mlx4_icm_iter iter;
+	__be64 *pages;
+	int lg;
+	int nent = 0;
+	int i;
+	int err = 0;
+	int ts = 0, tc = 0;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+	memset(mailbox->buf, 0, MLX4_MAILBOX_SIZE);
+	pages = mailbox->buf;
+
+	for (mlx4_icm_first(icm, &iter);
+	     !mlx4_icm_last(&iter);
+	     mlx4_icm_next(&iter)) {
+		/*
+		 * We have to pass pages that are aligned to their
+		 * size, so find the least significant 1 in the
+		 * address or size and use that as our log2 size.
+		 */
+		lg = ffs(mlx4_icm_addr(&iter) | mlx4_icm_size(&iter)) - 1;
+		if (lg < MLX4_ICM_PAGE_SHIFT) {
+			mlx4_warn(dev, "Got FW area not aligned to %d (%llx/%lx).\n",
+				   MLX4_ICM_PAGE_SIZE,
+				   (unsigned long long) mlx4_icm_addr(&iter),
+				   mlx4_icm_size(&iter));
+			err = -EINVAL;
+			goto out;
+		}
+
+		for (i = 0; i < mlx4_icm_size(&iter) >> lg; ++i) {
+			if (virt != -1) {
+				pages[nent * 2] = cpu_to_be64(virt);
+				virt += 1 << lg;
+			}
+
+			pages[nent * 2 + 1] =
+				cpu_to_be64((mlx4_icm_addr(&iter) + (i << lg)) |
+					    (lg - MLX4_ICM_PAGE_SHIFT));
+			ts += 1 << (lg - 10);
+			++tc;
+
+			if (++nent == MLX4_MAILBOX_SIZE / 16) {
+				err = mlx4_cmd(dev, mailbox->dma, nent, 0, op,
+						MLX4_CMD_TIME_CLASS_B);
+				if (err)
+					goto out;
+				nent = 0;
+			}
+		}
+	}
+
+	if (nent)
+		err = mlx4_cmd(dev, mailbox->dma, nent, 0, op, MLX4_CMD_TIME_CLASS_B);
+	if (err)
+		goto out;
+
+	switch (op) {
+	case MLX4_CMD_MAP_FA:
+		mlx4_dbg(dev, "Mapped %d chunks/%d KB for FW.\n", tc, ts);
+		break;
+	case MLX4_CMD_MAP_ICM_AUX:
+		mlx4_dbg(dev, "Mapped %d chunks/%d KB for ICM aux.\n", tc, ts);
+		break;
+	case MLX4_CMD_MAP_ICM:
+		mlx4_dbg(dev, "Mapped %d chunks/%d KB at %llx for ICM.\n",
+			  tc, ts, (unsigned long long) virt - (ts << 10));
+		break;
+	}
+
+out:
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	return err;
+}
+
+int mlx4_MAP_FA(struct mlx4_dev *dev, struct mlx4_icm *icm)
+{
+	return mlx4_map_cmd(dev, MLX4_CMD_MAP_FA, icm, -1);
+}
+
+int mlx4_UNMAP_FA(struct mlx4_dev *dev)
+{
+	return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_UNMAP_FA, MLX4_CMD_TIME_CLASS_B);
+}
+
+
+int mlx4_RUN_FW(struct mlx4_dev *dev)
+{
+	return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_RUN_FW, MLX4_CMD_TIME_CLASS_A);
+}
+
+int mlx4_QUERY_FW(struct mlx4_dev *dev)
+{
+	struct mlx4_fw  *fw  = &mlx4_priv(dev)->fw;
+	struct mlx4_cmd *cmd = &mlx4_priv(dev)->cmd;
+	struct mlx4_cmd_mailbox *mailbox;
+	u32 *outbox;
+	int err = 0;
+	u64 fw_ver;
+	u8 lg;
+
+#define QUERY_FW_OUT_SIZE             0x100
+#define QUERY_FW_VER_OFFSET            0x00
+#define QUERY_FW_MAX_CMD_OFFSET        0x0f
+#define QUERY_FW_ERR_START_OFFSET      0x30
+#define QUERY_FW_ERR_SIZE_OFFSET       0x38
+#define QUERY_FW_ERR_BAR_OFFSET        0x3c
+
+#define QUERY_FW_SIZE_OFFSET           0x00
+#define QUERY_FW_CLR_INT_BASE_OFFSET   0x20
+#define QUERY_FW_CLR_INT_BAR_OFFSET    0x28
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+	outbox = mailbox->buf;
+
+	err = mlx4_cmd_box(dev, 0, mailbox->dma, 0, 0, MLX4_CMD_QUERY_FW,
+			    MLX4_CMD_TIME_CLASS_A);
+	if (err)
+		goto out;
+
+	MLX4_GET(fw_ver, outbox, QUERY_FW_VER_OFFSET);
+	/*
+	 * FW subminor version is at more signifant bits than minor
+	 * version, so swap here.
+	 */
+	dev->caps.fw_ver = (fw_ver & 0xffff00000000ull) |
+		((fw_ver & 0xffff0000ull) >> 16) |
+		((fw_ver & 0x0000ffffull) << 16);
+
+	MLX4_GET(lg, outbox, QUERY_FW_MAX_CMD_OFFSET);
+	cmd->max_cmds = 1 << lg;
+
+	mlx4_dbg(dev, "FW version %d.%d.%03d, max commands %d\n",
+		 (int) (dev->caps.fw_ver >> 32),
+		 (int) (dev->caps.fw_ver >> 16) & 0xffff,
+		 (int) dev->caps.fw_ver & 0xffff,
+		 cmd->max_cmds);
+
+	MLX4_GET(fw->catas_offset, outbox, QUERY_FW_ERR_START_OFFSET);
+	MLX4_GET(fw->catas_size,   outbox, QUERY_FW_ERR_SIZE_OFFSET);
+	MLX4_GET(fw->catas_bar,    outbox, QUERY_FW_ERR_BAR_OFFSET);
+	fw->catas_bar = (fw->catas_bar >> 6) * 2;
+
+	mlx4_dbg(dev, "Catastrophic error buffer at 0x%llx, size 0x%x, BAR %d\n",
+		 (unsigned long long) fw->catas_offset, fw->catas_size, fw->catas_bar);
+
+	MLX4_GET(fw->fw_pages,     outbox, QUERY_FW_SIZE_OFFSET);
+	MLX4_GET(fw->clr_int_base, outbox, QUERY_FW_CLR_INT_BASE_OFFSET);
+	MLX4_GET(fw->clr_int_bar,  outbox, QUERY_FW_CLR_INT_BAR_OFFSET);
+	fw->clr_int_bar = (fw->clr_int_bar >> 6) * 2;
+
+	mlx4_dbg(dev, "FW size %d KB\n", fw->fw_pages >> 2);
+
+	/*
+	 * Round up number of system pages needed in case
+	 * MLX4_ICM_PAGE_SIZE < PAGE_SIZE.
+	 */
+	fw->fw_pages =
+		ALIGN(fw->fw_pages, PAGE_SIZE / MLX4_ICM_PAGE_SIZE) >>
+		(PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT);
+
+	mlx4_dbg(dev, "Clear int @ %llx, BAR %d\n",
+		 (unsigned long long) fw->clr_int_base, fw->clr_int_bar);
+
+out:
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	return err;
+}
+
+static void get_board_id(void *vsd, char *board_id)
+{
+	int i;
+
+#define VSD_OFFSET_SIG1		0x00
+#define VSD_OFFSET_SIG2		0xde
+#define VSD_OFFSET_MLX_BOARD_ID	0xd0
+#define VSD_OFFSET_TS_BOARD_ID	0x20
+
+#define VSD_SIGNATURE_TOPSPIN	0x5ad
+
+	memset(board_id, 0, MLX4_BOARD_ID_LEN);
+
+	if (be16_to_cpup(vsd + VSD_OFFSET_SIG1) == VSD_SIGNATURE_TOPSPIN &&
+	    be16_to_cpup(vsd + VSD_OFFSET_SIG2) == VSD_SIGNATURE_TOPSPIN) {
+		strlcpy(board_id, vsd + VSD_OFFSET_TS_BOARD_ID, MLX4_BOARD_ID_LEN);
+	} else {
+		/*
+		 * The board ID is a string but the firmware byte
+		 * swaps each 4-byte word before passing it back to
+		 * us.  Therefore we need to swab it before printing.
+		 */
+		for (i = 0; i < 4; ++i)
+			((u32 *) board_id)[i] =
+				swab32(*(u32 *) (vsd + VSD_OFFSET_MLX_BOARD_ID + i * 4));
+	}
+}
+
+int mlx4_QUERY_ADAPTER(struct mlx4_dev *dev, struct mlx4_adapter *adapter)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+	u32 *outbox;
+	int err;
+
+#define QUERY_ADAPTER_OUT_SIZE             0x100
+#define QUERY_ADAPTER_VENDOR_ID_OFFSET     0x00
+#define QUERY_ADAPTER_DEVICE_ID_OFFSET     0x04
+#define QUERY_ADAPTER_REVISION_ID_OFFSET   0x08
+#define QUERY_ADAPTER_INTA_PIN_OFFSET      0x10
+#define QUERY_ADAPTER_VSD_OFFSET           0x20
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+	outbox = mailbox->buf;
+
+	err = mlx4_cmd_box(dev, 0, mailbox->dma, 0, 0, MLX4_CMD_QUERY_ADAPTER,
+			   MLX4_CMD_TIME_CLASS_A);
+	if (err)
+		goto out;
+
+	MLX4_GET(adapter->vendor_id, outbox,   QUERY_ADAPTER_VENDOR_ID_OFFSET);
+	MLX4_GET(adapter->device_id, outbox,   QUERY_ADAPTER_DEVICE_ID_OFFSET);
+	MLX4_GET(adapter->revision_id, outbox, QUERY_ADAPTER_REVISION_ID_OFFSET);
+	MLX4_GET(adapter->inta_pin, outbox,    QUERY_ADAPTER_INTA_PIN_OFFSET);
+
+	get_board_id(outbox + QUERY_ADAPTER_VSD_OFFSET / 4,
+		     adapter->board_id);
+
+out:
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	return err;
+}
+
+int mlx4_INIT_HCA(struct mlx4_dev *dev, struct mlx4_init_hca_param *param)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+	__be32 *inbox;
+	int err;
+
+#define INIT_HCA_IN_SIZE		 0x200
+#define INIT_HCA_VERSION_OFFSET		 0x000
+#define	 INIT_HCA_VERSION		 2
+#define INIT_HCA_FLAGS_OFFSET		 0x014
+#define INIT_HCA_QPC_OFFSET		 0x020
+#define	 INIT_HCA_QPC_BASE_OFFSET	 (INIT_HCA_QPC_OFFSET + 0x10)
+#define	 INIT_HCA_LOG_QP_OFFSET		 (INIT_HCA_QPC_OFFSET + 0x17)
+#define	 INIT_HCA_SRQC_BASE_OFFSET	 (INIT_HCA_QPC_OFFSET + 0x28)
+#define	 INIT_HCA_LOG_SRQ_OFFSET	 (INIT_HCA_QPC_OFFSET + 0x2f)
+#define	 INIT_HCA_CQC_BASE_OFFSET	 (INIT_HCA_QPC_OFFSET + 0x30)
+#define	 INIT_HCA_LOG_CQ_OFFSET		 (INIT_HCA_QPC_OFFSET + 0x37)
+#define	 INIT_HCA_ALTC_BASE_OFFSET	 (INIT_HCA_QPC_OFFSET + 0x40)
+#define	 INIT_HCA_AUXC_BASE_OFFSET	 (INIT_HCA_QPC_OFFSET + 0x50)
+#define	 INIT_HCA_EQC_BASE_OFFSET	 (INIT_HCA_QPC_OFFSET + 0x60)
+#define	 INIT_HCA_LOG_EQ_OFFSET		 (INIT_HCA_QPC_OFFSET + 0x67)
+#define	 INIT_HCA_RDMARC_BASE_OFFSET	 (INIT_HCA_QPC_OFFSET + 0x70)
+#define	 INIT_HCA_LOG_RD_OFFSET		 (INIT_HCA_QPC_OFFSET + 0x77)
+#define INIT_HCA_MCAST_OFFSET		 0x0c0
+#define	 INIT_HCA_MC_BASE_OFFSET	 (INIT_HCA_MCAST_OFFSET + 0x00)
+#define	 INIT_HCA_LOG_MC_ENTRY_SZ_OFFSET (INIT_HCA_MCAST_OFFSET + 0x12)
+#define	 INIT_HCA_LOG_MC_HASH_SZ_OFFSET	 (INIT_HCA_MCAST_OFFSET + 0x16)
+#define	 INIT_HCA_LOG_MC_TABLE_SZ_OFFSET (INIT_HCA_MCAST_OFFSET + 0x1b)
+#define INIT_HCA_TPT_OFFSET		 0x0f0
+#define	 INIT_HCA_DMPT_BASE_OFFSET	 (INIT_HCA_TPT_OFFSET + 0x00)
+#define	 INIT_HCA_LOG_MPT_SZ_OFFSET	 (INIT_HCA_TPT_OFFSET + 0x0b)
+#define	 INIT_HCA_MTT_BASE_OFFSET	 (INIT_HCA_TPT_OFFSET + 0x10)
+#define	 INIT_HCA_CMPT_BASE_OFFSET	 (INIT_HCA_TPT_OFFSET + 0x18)
+#define INIT_HCA_UAR_OFFSET		 0x120
+#define	 INIT_HCA_LOG_UAR_SZ_OFFSET	 (INIT_HCA_UAR_OFFSET + 0x0a)
+#define  INIT_HCA_UAR_PAGE_SZ_OFFSET     (INIT_HCA_UAR_OFFSET + 0x0b)
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+	inbox = mailbox->buf;
+
+	memset(inbox, 0, INIT_HCA_IN_SIZE);
+
+	*((u8 *) mailbox->buf + INIT_HCA_VERSION_OFFSET) = INIT_HCA_VERSION;
+
+#if defined(__LITTLE_ENDIAN)
+	*(inbox + INIT_HCA_FLAGS_OFFSET / 4) &= ~cpu_to_be32(1 << 1);
+#elif defined(__BIG_ENDIAN)
+	*(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1 << 1);
+#else
+#error Host endianness not defined
+#endif
+	/* Check port for UD address vector: */
+	*(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1);
+
+	/* QPC/EEC/CQC/EQC/RDMARC attributes */
+
+	MLX4_PUT(inbox, param->qpc_base,      INIT_HCA_QPC_BASE_OFFSET);
+	MLX4_PUT(inbox, param->log_num_qps,   INIT_HCA_LOG_QP_OFFSET);
+	MLX4_PUT(inbox, param->srqc_base,     INIT_HCA_SRQC_BASE_OFFSET);
+	MLX4_PUT(inbox, param->log_num_srqs,  INIT_HCA_LOG_SRQ_OFFSET);
+	MLX4_PUT(inbox, param->cqc_base,      INIT_HCA_CQC_BASE_OFFSET);
+	MLX4_PUT(inbox, param->log_num_cqs,   INIT_HCA_LOG_CQ_OFFSET);
+	MLX4_PUT(inbox, param->altc_base,     INIT_HCA_ALTC_BASE_OFFSET);
+	MLX4_PUT(inbox, param->auxc_base,     INIT_HCA_AUXC_BASE_OFFSET);
+	MLX4_PUT(inbox, param->eqc_base,      INIT_HCA_EQC_BASE_OFFSET);
+	MLX4_PUT(inbox, param->log_num_eqs,   INIT_HCA_LOG_EQ_OFFSET);
+	MLX4_PUT(inbox, param->rdmarc_base,   INIT_HCA_RDMARC_BASE_OFFSET);
+	MLX4_PUT(inbox, param->log_rd_per_qp, INIT_HCA_LOG_RD_OFFSET);
+
+	/* multicast attributes */
+
+	MLX4_PUT(inbox, param->mc_base,		INIT_HCA_MC_BASE_OFFSET);
+	MLX4_PUT(inbox, param->log_mc_entry_sz, INIT_HCA_LOG_MC_ENTRY_SZ_OFFSET);
+	MLX4_PUT(inbox, param->log_mc_hash_sz,  INIT_HCA_LOG_MC_HASH_SZ_OFFSET);
+	MLX4_PUT(inbox, param->log_mc_table_sz, INIT_HCA_LOG_MC_TABLE_SZ_OFFSET);
+
+	/* TPT attributes */
+
+	MLX4_PUT(inbox, param->dmpt_base,  INIT_HCA_DMPT_BASE_OFFSET);
+	MLX4_PUT(inbox, param->log_mpt_sz, INIT_HCA_LOG_MPT_SZ_OFFSET);
+	MLX4_PUT(inbox, param->mtt_base,   INIT_HCA_MTT_BASE_OFFSET);
+	MLX4_PUT(inbox, param->cmpt_base,  INIT_HCA_CMPT_BASE_OFFSET);
+
+	/* UAR attributes */
+
+	MLX4_PUT(inbox, (u8) (PAGE_SHIFT - 12), INIT_HCA_UAR_PAGE_SZ_OFFSET);
+	MLX4_PUT(inbox, param->log_uar_sz,      INIT_HCA_LOG_UAR_SZ_OFFSET);
+
+	err = mlx4_cmd(dev, mailbox->dma, 0, 0, MLX4_CMD_INIT_HCA, 1000);
+
+	if (err)
+		mlx4_err(dev, "INIT_HCA returns %d\n", err);
+
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	return err;
+}
+
+int mlx4_INIT_PORT(struct mlx4_dev *dev, struct mlx4_init_port_param *param, int port)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+	u32 *inbox;
+	int err;
+	u32 flags;
+
+#define INIT_PORT_IN_SIZE          256
+#define INIT_PORT_FLAGS_OFFSET     0x00
+#define INIT_PORT_FLAG_SIG         (1 << 18)
+#define INIT_PORT_FLAG_NG          (1 << 17)
+#define INIT_PORT_FLAG_G0          (1 << 16)
+#define INIT_PORT_VL_SHIFT         4
+#define INIT_PORT_PORT_WIDTH_SHIFT 8
+#define INIT_PORT_MTU_OFFSET       0x04
+#define INIT_PORT_MAX_GID_OFFSET   0x06
+#define INIT_PORT_MAX_PKEY_OFFSET  0x0a
+#define INIT_PORT_GUID0_OFFSET     0x10
+#define INIT_PORT_NODE_GUID_OFFSET 0x18
+#define INIT_PORT_SI_GUID_OFFSET   0x20
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+	inbox = mailbox->buf;
+
+	memset(inbox, 0, INIT_PORT_IN_SIZE);
+
+	flags = 0;
+	flags |= param->set_guid0     ? INIT_PORT_FLAG_G0  : 0;
+	flags |= param->set_node_guid ? INIT_PORT_FLAG_NG  : 0;
+	flags |= param->set_si_guid   ? INIT_PORT_FLAG_SIG : 0;
+	flags |= (param->vl_cap & 0xf) << INIT_PORT_VL_SHIFT;
+	flags |= (param->port_width_cap & 0xf) << INIT_PORT_PORT_WIDTH_SHIFT;
+	MLX4_PUT(inbox, flags,            INIT_PORT_FLAGS_OFFSET);
+
+	MLX4_PUT(inbox, param->mtu,       INIT_PORT_MTU_OFFSET);
+	MLX4_PUT(inbox, param->max_gid,   INIT_PORT_MAX_GID_OFFSET);
+	MLX4_PUT(inbox, param->max_pkey,  INIT_PORT_MAX_PKEY_OFFSET);
+	MLX4_PUT(inbox, param->guid0,     INIT_PORT_GUID0_OFFSET);
+	MLX4_PUT(inbox, param->node_guid, INIT_PORT_NODE_GUID_OFFSET);
+	MLX4_PUT(inbox, param->si_guid,   INIT_PORT_SI_GUID_OFFSET);
+
+	err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_INIT_PORT,
+		       MLX4_CMD_TIME_CLASS_A);
+
+	mlx4_free_cmd_mailbox(dev, mailbox);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_INIT_PORT);
+
+int mlx4_CLOSE_PORT(struct mlx4_dev *dev, int port)
+{
+	return mlx4_cmd(dev, 0, port, 0, MLX4_CMD_CLOSE_PORT, 1000);
+}
+EXPORT_SYMBOL_GPL(mlx4_CLOSE_PORT);
+
+int mlx4_CLOSE_HCA(struct mlx4_dev *dev, int panic)
+{
+	return mlx4_cmd(dev, 0, 0, panic, MLX4_CMD_CLOSE_HCA, 1000);
+}
+
+int mlx4_SET_ICM_SIZE(struct mlx4_dev *dev, u64 icm_size, u64 *aux_pages)
+{
+	int ret = mlx4_cmd_imm(dev, icm_size, aux_pages, 0, 0,
+			       MLX4_CMD_SET_ICM_SIZE,
+			       MLX4_CMD_TIME_CLASS_A);
+	if (ret)
+		return ret;
+
+	/*
+	 * Round up number of system pages needed in case
+	 * MLX4_ICM_PAGE_SIZE < PAGE_SIZE.
+	 */
+	*aux_pages = ALIGN(*aux_pages, PAGE_SIZE / MLX4_ICM_PAGE_SIZE) >>
+		(PAGE_SHIFT - MLX4_ICM_PAGE_SHIFT);
+
+	return 0;
+}
+
+int mlx4_NOP(struct mlx4_dev *dev)
+{
+	/* Input modifier of 0x1f means "finish as soon as possible." */
+	return mlx4_cmd(dev, 0, 0x1f, 0, MLX4_CMD_NOP, 100);
+}

drivers/net/mlx4/fw.h

+/*
+ * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2006, 2007 Cisco Systems.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_FW_H
+#define MLX4_FW_H
+
+#include "mlx4.h"
+#include "icm.h"
+
+struct mlx4_dev_cap {
+	int max_srq_sz;
+	int max_qp_sz;
+	int reserved_qps;
+	int max_qps;
+	int reserved_srqs;
+	int max_srqs;
+	int max_cq_sz;
+	int reserved_cqs;
+	int max_cqs;
+	int max_mpts;
+	int reserved_eqs;
+	int max_eqs;
+	int reserved_mtts;
+	int max_mrw_sz;
+	int reserved_mrws;
+	int max_mtt_seg;
+	int max_requester_per_qp;
+	int max_responder_per_qp;
+	int max_rdma_global;
+	int local_ca_ack_delay;
+	int max_mtu;
+	int max_port_width;
+	int max_vl;
+	int num_ports;
+	int max_gids;
+	u16 stat_rate_support;
+	int max_pkeys;
+	u32 flags;
+	int reserved_uars;
+	int uar_size;
+	int min_page_sz;
+	int bf_reg_size;
+	int bf_regs_per_page;
+	int max_sq_sg;
+	int max_sq_desc_sz;
+	int max_rq_sg;
+	int max_rq_desc_sz;
+	int max_qp_per_mcg;
+	int reserved_mgms;
+	int max_mcgs;
+	int reserved_pds;
+	int max_pds;
+	int qpc_entry_sz;
+	int rdmarc_entry_sz;
+	int altc_entry_sz;
+	int aux_entry_sz;
+	int srq_entry_sz;
+	int cqc_entry_sz;
+	int eqc_entry_sz;
+	int dmpt_entry_sz;
+	int cmpt_entry_sz;
+	int mtt_entry_sz;
+	int resize_srq;
+	u8  bmme_flags;
+	u32 reserved_lkey;
+	u64 max_icm_sz;
+};
+
+struct mlx4_adapter {
+	u32  vendor_id;
+	u32  device_id;
+	u32  revision_id;
+	char board_id[MLX4_BOARD_ID_LEN];
+	u8   inta_pin;
+};
+
+struct mlx4_init_hca_param {
+	u64 qpc_base;
+	u64 rdmarc_base;
+	u64 auxc_base;
+	u64 altc_base;
+	u64 srqc_base;
+	u64 cqc_base;
+	u64 eqc_base;
+	u64 mc_base;
+	u64 dmpt_base;
+	u64 cmpt_base;
+	u64 mtt_base;
+	u16 log_mc_entry_sz;
+	u16 log_mc_hash_sz;
+	u8  log_num_qps;
+	u8  log_num_srqs;
+	u8  log_num_cqs;
+	u8  log_num_eqs;
+	u8  log_rd_per_qp;
+	u8  log_mc_table_sz;
+	u8  log_mpt_sz;
+	u8  log_uar_sz;
+};
+
+struct mlx4_init_ib_param {
+	int port_width;
+	int vl_cap;
+	int mtu_cap;
+	u16 gid_cap;
+	u16 pkey_cap;
+	int set_guid0;
+	u64 guid0;
+	int set_node_guid;
+	u64 node_guid;
+	int set_si_guid;
+	u64 si_guid;
+};
+
+struct mlx4_set_ib_param {
+	int set_si_guid;
+	int reset_qkey_viol;
+	u64 si_guid;
+	u32 cap_mask;
+};
+
+int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap);
+int mlx4_MAP_FA(struct mlx4_dev *dev, struct mlx4_icm *icm);
+int mlx4_UNMAP_FA(struct mlx4_dev *dev);
+int mlx4_RUN_FW(struct mlx4_dev *dev);
+int mlx4_QUERY_FW(struct mlx4_dev *dev);
+int mlx4_QUERY_ADAPTER(struct mlx4_dev *dev, struct mlx4_adapter *adapter);
+int mlx4_INIT_HCA(struct mlx4_dev *dev, struct mlx4_init_hca_param *param);
+int mlx4_CLOSE_HCA(struct mlx4_dev *dev, int panic);
+int mlx4_map_cmd(struct mlx4_dev *dev, u16 op, struct mlx4_icm *icm, u64 virt);
+int mlx4_SET_ICM_SIZE(struct mlx4_dev *dev, u64 icm_size, u64 *aux_pages);
+int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm);
+int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev);
+int mlx4_NOP(struct mlx4_dev *dev);
+
+#endif /* MLX4_FW_H */

drivers/net/mlx4/icm.c

+/*
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4.h"
+#include "icm.h"
+#include "fw.h"
+
+/*
+ * We allocate in as big chunks as we can, up to a maximum of 256 KB
+ * per chunk.
+ */
+enum {
+	MLX4_ICM_ALLOC_SIZE	= 1 << 18,
+	MLX4_TABLE_CHUNK_SIZE	= 1 << 18
+};
+
+void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm)
+{
+	struct mlx4_icm_chunk *chunk, *tmp;
+	int i;
+
+	list_for_each_entry_safe(chunk, tmp, &icm->chunk_list, list) {
+		if (chunk->nsg > 0)
+			pci_unmap_sg(dev->pdev, chunk->mem, chunk->npages,
+				     PCI_DMA_BIDIRECTIONAL);
+
+		for (i = 0; i < chunk->npages; ++i)
+			__free_pages(chunk->mem[i].page,
+				     get_order(chunk->mem[i].length));
+
+		kfree(chunk);
+	}
+
+	kfree(icm);
+}
+
+struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages,
+				gfp_t gfp_mask)
+{
+	struct mlx4_icm *icm;
+	struct mlx4_icm_chunk *chunk = NULL;
+	int cur_order;
+
+	icm = kmalloc(sizeof *icm, gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN));
+	if (!icm)
+		return icm;
+
+	icm->refcount = 0;
+	INIT_LIST_HEAD(&icm->chunk_list);
+
+	cur_order = get_order(MLX4_ICM_ALLOC_SIZE);
+
+	while (npages > 0) {
+		if (!chunk) {
+			chunk = kmalloc(sizeof *chunk,
+					gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN));
+			if (!chunk)
+				goto fail;
+
+			chunk->npages = 0;
+			chunk->nsg    = 0;
+			list_add_tail(&chunk->list, &icm->chunk_list);
+		}
+
+		while (1 << cur_order > npages)
+			--cur_order;
+
+		chunk->mem[chunk->npages].page = alloc_pages(gfp_mask, cur_order);
+		if (chunk->mem[chunk->npages].page) {
+			chunk->mem[chunk->npages].length = PAGE_SIZE << cur_order;
+			chunk->mem[chunk->npages].offset = 0;
+
+			if (++chunk->npages == MLX4_ICM_CHUNK_LEN) {
+				chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
+							chunk->npages,
+							PCI_DMA_BIDIRECTIONAL);
+
+				if (chunk->nsg <= 0)
+					goto fail;
+
+				chunk = NULL;
+			}
+
+			npages -= 1 << cur_order;
+		} else {
+			--cur_order;
+			if (cur_order < 0)
+				goto fail;
+		}
+	}
+
+	if (chunk) {
+		chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
+					chunk->npages,
+					PCI_DMA_BIDIRECTIONAL);
+
+		if (chunk->nsg <= 0)
+			goto fail;
+	}
+
+	return icm;
+
+fail:
+	mlx4_free_icm(dev, icm);
+	return NULL;
+}
+
+static int mlx4_MAP_ICM(struct mlx4_dev *dev, struct mlx4_icm *icm, u64 virt)
+{
+	return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM, icm, virt);
+}
+
+int mlx4_UNMAP_ICM(struct mlx4_dev *dev, u64 virt, u32 page_count)
+{
+	return mlx4_cmd(dev, virt, page_count, 0, MLX4_CMD_UNMAP_ICM,
+			MLX4_CMD_TIME_CLASS_B);
+}
+
+int mlx4_MAP_ICM_page(struct mlx4_dev *dev, u64 dma_addr, u64 virt)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+	__be64 *inbox;
+	int err;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+	inbox = mailbox->buf;
+
+	inbox[0] = cpu_to_be64(virt);
+	inbox[1] = cpu_to_be64(dma_addr);
+
+	err = mlx4_cmd(dev, mailbox->dma, 1, 0, MLX4_CMD_MAP_ICM,
+		       MLX4_CMD_TIME_CLASS_B);
+
+	mlx4_free_cmd_mailbox(dev, mailbox);
+
+	if (!err)
+		mlx4_dbg(dev, "Mapped page at %llx to %llx for ICM.\n",
+			  (unsigned long long) dma_addr, (unsigned long long) virt);
+
+	return err;
+}
+
+int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm)
+{
+	return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM_AUX, icm, -1);
+}
+
+int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev)
+{
+	return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_UNMAP_ICM_AUX, MLX4_CMD_TIME_CLASS_B);
+}
+
+int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj)
+{
+	int i = (obj & (table->num_obj - 1)) / (MLX4_TABLE_CHUNK_SIZE / table->obj_size);
+	int ret = 0;
+
+	mutex_lock(&table->mutex);
+
+	if (table->icm[i]) {
+		++table->icm[i]->refcount;
+		goto out;
+	}
+
+	table->icm[i] = mlx4_alloc_icm(dev, MLX4_TABLE_CHUNK_SIZE >> PAGE_SHIFT,
+				       (table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
+				       __GFP_NOWARN);
+	if (!table->icm[i]) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	if (mlx4_MAP_ICM(dev, table->icm[i], table->virt +
+			 (u64) i * MLX4_TABLE_CHUNK_SIZE)) {
+		mlx4_free_icm(dev, table->icm[i]);
+		table->icm[i] = NULL;
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	++table->icm[i]->refcount;
+
+out:
+	mutex_unlock(&table->mutex);
+	return ret;
+}
+
+void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj)
+{
+	int i;
+
+	i = (obj & (table->num_obj - 1)) / (MLX4_TABLE_CHUNK_SIZE / table->obj_size);
+
+	mutex_lock(&table->mutex);
+
+	if (--table->icm[i]->refcount == 0) {
+		mlx4_UNMAP_ICM(dev, table->virt + i * MLX4_TABLE_CHUNK_SIZE,
+			       MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE);
+		mlx4_free_icm(dev, table->icm[i]);
+		table->icm[i] = NULL;
+	}
+
+	mutex_unlock(&table->mutex);
+}
+
+void *mlx4_table_find(struct mlx4_icm_table *table, int obj)
+{
+	int idx, offset, i;
+	struct mlx4_icm_chunk *chunk;
+	struct mlx4_icm *icm;
+	struct page *page = NULL;
+
+	if (!table->lowmem)
+		return NULL;
+
+	mutex_lock(&table->mutex);
+
+	idx = obj & (table->num_obj - 1);
+	icm = table->icm[idx / (MLX4_TABLE_CHUNK_SIZE / table->obj_size)];
+	offset = idx % (MLX4_TABLE_CHUNK_SIZE / table->obj_size);
+
+	if (!icm)
+		goto out;
+
+	list_for_each_entry(chunk, &icm->chunk_list, list) {
+		for (i = 0; i < chunk->npages; ++i) {
+			if (chunk->mem[i].length > offset) {
+				page = chunk->mem[i].page;
+				goto out;
+			}
+			offset -= chunk->mem[i].length;
+		}
+	}
+
+out:
+	mutex_unlock(&table->mutex);
+	return page ? lowmem_page_address(page) + offset : NULL;
+}
+
+int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+			 int start, int end)
+{
+	int inc = MLX4_TABLE_CHUNK_SIZE / table->obj_size;
+	int i, err;
+
+	for (i = start; i <= end; i += inc) {
+		err = mlx4_table_get(dev, table, i);
+		if (err)
+			goto fail;
+	}
+
+	return 0;
+
+fail:
+	while (i > start) {
+		i -= inc;
+		mlx4_table_put(dev, table, i);
+	}
+
+	return err;
+}
+
+void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+			  int start, int end)
+{
+	int i;
+
+	for (i = start; i <= end; i += MLX4_TABLE_CHUNK_SIZE / table->obj_size)
+		mlx4_table_put(dev, table, i);
+}
+
+int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+			u64 virt, int obj_size,	int nobj, int reserved,
+			int use_lowmem)
+{
+	int obj_per_chunk;
+	int num_icm;
+	unsigned chunk_size;
+	int i;
+
+	obj_per_chunk = MLX4_TABLE_CHUNK_SIZE / obj_size;
+	num_icm = (nobj + obj_per_chunk - 1) / obj_per_chunk;
+
+	table->icm      = kcalloc(num_icm, sizeof *table->icm, GFP_KERNEL);
+	if (!table->icm)
+		return -ENOMEM;
+	table->virt     = virt;
+	table->num_icm  = num_icm;
+	table->num_obj  = nobj;
+	table->obj_size = obj_size;
+	table->lowmem   = use_lowmem;
+	mutex_init(&table->mutex);
+
+	for (i = 0; i * MLX4_TABLE_CHUNK_SIZE < reserved * obj_size; ++i) {
+		chunk_size = MLX4_TABLE_CHUNK_SIZE;
+		if ((i + 1) * MLX4_TABLE_CHUNK_SIZE > nobj * obj_size)
+			chunk_size = PAGE_ALIGN(nobj * obj_size - i * MLX4_TABLE_CHUNK_SIZE);
+
+		table->icm[i] = mlx4_alloc_icm(dev, chunk_size >> PAGE_SHIFT,
+					       (use_lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
+					       __GFP_NOWARN);
+		if (!table->icm[i])
+			goto err;
+		if (mlx4_MAP_ICM(dev, table->icm[i], virt + i * MLX4_TABLE_CHUNK_SIZE)) {
+			mlx4_free_icm(dev, table->icm[i]);
+			table->icm[i] = NULL;
+			goto err;
+		}
+
+		/*
+		 * Add a reference to this ICM chunk so that it never
+		 * gets freed (since it contains reserved firmware objects).
+		 */
+		++table->icm[i]->refcount;
+	}
+
+	return 0;
+
+err:
+	for (i = 0; i < num_icm; ++i)
+		if (table->icm[i]) {
+			mlx4_UNMAP_ICM(dev, virt + i * MLX4_TABLE_CHUNK_SIZE,
+				       MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE);
+			mlx4_free_icm(dev, table->icm[i]);
+		}
+
+	return -ENOMEM;
+}
+
+void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table)
+{
+	int i;
+
+	for (i = 0; i < table->num_icm; ++i)
+		if (table->icm[i]) {
+			mlx4_UNMAP_ICM(dev, table->virt + i * MLX4_TABLE_CHUNK_SIZE,
+				       MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE);
+			mlx4_free_icm(dev, table->icm[i]);
+		}
+
+	kfree(table->icm);
+}

drivers/net/mlx4/icm.h

+/*
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_ICM_H
+#define MLX4_ICM_H
+
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/mutex.h>
+
+#define MLX4_ICM_CHUNK_LEN						\
+	((256 - sizeof (struct list_head) - 2 * sizeof (int)) /		\
+	 (sizeof (struct scatterlist)))
+
+enum {
+	MLX4_ICM_PAGE_SHIFT	= 12,
+	MLX4_ICM_PAGE_SIZE	= 1 << MLX4_ICM_PAGE_SHIFT,
+};
+
+struct mlx4_icm_chunk {
+	struct list_head	list;
+	int			npages;
+	int			nsg;
+	struct scatterlist	mem[MLX4_ICM_CHUNK_LEN];
+};
+
+struct mlx4_icm {
+	struct list_head	chunk_list;
+	int			refcount;
+};
+
+struct mlx4_icm_iter {
+	struct mlx4_icm	       *icm;
+	struct mlx4_icm_chunk  *chunk;
+	int			page_idx;
+};
+
+struct mlx4_dev;
+
+struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages, gfp_t gfp_mask);
+void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm);
+
+int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj);
+void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj);
+int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+			 int start, int end);
+void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+			  int start, int end);
+int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+			u64 virt, int obj_size,	int nobj, int reserved,
+			int use_lowmem);
+void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table);
+int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj);
+void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj);
+void *mlx4_table_find(struct mlx4_icm_table *table, int obj);
+int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+			 int start, int end);
+void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
+			  int start, int end);
+
+static inline void mlx4_icm_first(struct mlx4_icm *icm,
+				  struct mlx4_icm_iter *iter)
+{
+	iter->icm      = icm;
+	iter->chunk    = list_empty(&icm->chunk_list) ?
+		NULL : list_entry(icm->chunk_list.next,
+				  struct mlx4_icm_chunk, list);
+	iter->page_idx = 0;
+}
+
+static inline int mlx4_icm_last(struct mlx4_icm_iter *iter)
+{
+	return !iter->chunk;
+}
+
+static inline void mlx4_icm_next(struct mlx4_icm_iter *iter)
+{
+	if (++iter->page_idx >= iter->chunk->nsg) {
+		if (iter->chunk->list.next == &iter->icm->chunk_list) {
+			iter->chunk = NULL;
+			return;
+		}
+
+		iter->chunk = list_entry(iter->chunk->list.next,
+					 struct mlx4_icm_chunk, list);
+		iter->page_idx = 0;
+	}
+}
+
+static inline dma_addr_t mlx4_icm_addr(struct mlx4_icm_iter *iter)
+{
+	return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
+}
+
+static inline unsigned long mlx4_icm_size(struct mlx4_icm_iter *iter)
+{
+	return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
+}
+
+int mlx4_UNMAP_ICM(struct mlx4_dev *dev, u64 virt, u32 page_count);
+int mlx4_MAP_ICM_page(struct mlx4_dev *dev, u64 dma_addr, u64 virt);
+int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm);
+int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev);
+
+#endif /* MLX4_ICM_H */

drivers/net/mlx4/intf.c

+/*
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/mlx4/driver.h>
+
+#include "mlx4.h"
+
+struct mlx4_device_context {
+	struct list_head	list;
+	struct mlx4_interface  *intf;
+	void		       *context;
+};
+
+static LIST_HEAD(intf_list);
+static LIST_HEAD(dev_list);
+static DEFINE_MUTEX(intf_mutex);
+
+static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
+{
+	struct mlx4_device_context *dev_ctx;
+
+	dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL);
+	if (!dev_ctx)
+		return;
+
+	dev_ctx->intf    = intf;
+	dev_ctx->context = intf->add(&priv->dev);
+
+	if (dev_ctx->context) {
+		spin_lock_irq(&priv->ctx_lock);
+		list_add_tail(&dev_ctx->list, &priv->ctx_list);
+		spin_unlock_irq(&priv->ctx_lock);
+	} else
+		kfree(dev_ctx);
+}
+
+static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
+{
+	struct mlx4_device_context *dev_ctx;
+
+	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
+		if (dev_ctx->intf == intf) {
+			spin_lock_irq(&priv->ctx_lock);
+			list_del(&dev_ctx->list);
+			spin_unlock_irq(&priv->ctx_lock);
+
+			intf->remove(&priv->dev, dev_ctx->context);
+			kfree(dev_ctx);
+			return;
+		}
+}
+
+int mlx4_register_interface(struct mlx4_interface *intf)
+{
+	struct mlx4_priv *priv;
+
+	if (!intf->add || !intf->remove)
+		return -EINVAL;
+
+	mutex_lock(&intf_mutex);
+
+	list_add_tail(&intf->list, &intf_list);
+	list_for_each_entry(priv, &dev_list, dev_list)
+		mlx4_add_device(intf, priv);
+
+	mutex_unlock(&intf_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_register_interface);
+
+void mlx4_unregister_interface(struct mlx4_interface *intf)
+{
+	struct mlx4_priv *priv;
+
+	mutex_lock(&intf_mutex);
+
+	list_for_each_entry(priv, &dev_list, dev_list)
+		mlx4_remove_device(intf, priv);
+
+	list_del(&intf->list);
+
+	mutex_unlock(&intf_mutex);
+}
+EXPORT_SYMBOL_GPL(mlx4_unregister_interface);
+
+void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_event type,
+			 int subtype, int port)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_device_context *dev_ctx;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->ctx_lock, flags);
+
+	list_for_each_entry(dev_ctx, &priv->ctx_list, list)
+		if (dev_ctx->intf->event)
+			dev_ctx->intf->event(dev, dev_ctx->context, type,
+					     subtype, port);
+
+	spin_unlock_irqrestore(&priv->ctx_lock, flags);
+}
+
+int mlx4_register_device(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_interface *intf;
+
+	INIT_LIST_HEAD(&priv->ctx_list);
+	spin_lock_init(&priv->ctx_lock);
+
+	mutex_lock(&intf_mutex);
+
+	list_add_tail(&priv->dev_list, &dev_list);
+	list_for_each_entry(intf, &intf_list, list)
+		mlx4_add_device(intf, priv);
+
+	mutex_unlock(&intf_mutex);
+
+	return 0;
+}
+
+void mlx4_unregister_device(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_interface *intf;
+
+	mutex_lock(&intf_mutex);
+
+	list_for_each_entry(intf, &intf_list, list)
+		mlx4_remove_device(intf, priv);
+
+	list_del(&priv->dev_list);
+
+	mutex_unlock(&intf_mutex);
+}

drivers/net/mlx4/main.c

+/*
+ * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+
+#include <linux/mlx4/device.h>
+#include <linux/mlx4/doorbell.h>
+
+#include "mlx4.h"
+#include "fw.h"
+#include "icm.h"
+
+MODULE_AUTHOR("Roland Dreier");
+MODULE_DESCRIPTION("Mellanox ConnectX HCA low-level driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(DRV_VERSION);
+
+#ifdef CONFIG_MLX4_DEBUG
+
+int mlx4_debug_level = 0;
+module_param_named(debug_level, mlx4_debug_level, int, 0644);
+MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
+
+#endif /* CONFIG_MLX4_DEBUG */
+
+#ifdef CONFIG_PCI_MSI
+
+static int msi_x;
+module_param(msi_x, int, 0444);
+MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");
+
+#else /* CONFIG_PCI_MSI */
+
+#define msi_x (0)
+
+#endif /* CONFIG_PCI_MSI */
+
+static const char mlx4_version[] __devinitdata =
+	DRV_NAME ": Mellanox ConnectX core driver v"
+	DRV_VERSION " (" DRV_RELDATE ")\n";
+
+static struct mlx4_profile default_profile = {
+	.num_qp		= 1 << 16,
+	.num_srq	= 1 << 16,
+	.rdmarc_per_qp	= 4,
+	.num_cq		= 1 << 16,
+	.num_mcg	= 1 << 13,
+	.num_mpt	= 1 << 17,
+	.num_mtt	= 1 << 20,
+};
+
+static int __devinit mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
+{
+	int err;
+
+	err = mlx4_QUERY_DEV_CAP(dev, dev_cap);
+	if (err) {
+		mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
+		return err;
+	}
+
+	if (dev_cap->min_page_sz > PAGE_SIZE) {
+		mlx4_err(dev, "HCA minimum page size of %d bigger than "
+			 "kernel PAGE_SIZE of %ld, aborting.\n",
+			 dev_cap->min_page_sz, PAGE_SIZE);
+		return -ENODEV;
+	}
+	if (dev_cap->num_ports > MLX4_MAX_PORTS) {
+		mlx4_err(dev, "HCA has %d ports, but we only support %d, "
+			 "aborting.\n",
+			 dev_cap->num_ports, MLX4_MAX_PORTS);
+		return -ENODEV;
+	}
+
+	if (dev_cap->uar_size > pci_resource_len(dev->pdev, 2)) {
+		mlx4_err(dev, "HCA reported UAR size of 0x%x bigger than "
+			 "PCI resource 2 size of 0x%llx, aborting.\n",
+			 dev_cap->uar_size,
+			 (unsigned long long) pci_resource_len(dev->pdev, 2));
+		return -ENODEV;
+	}
+
+	dev->caps.num_ports	     = dev_cap->num_ports;
+	dev->caps.num_uars	     = dev_cap->uar_size / PAGE_SIZE;
+	dev->caps.vl_cap	     = dev_cap->max_vl;
+	dev->caps.mtu_cap	     = dev_cap->max_mtu;
+	dev->caps.gid_table_len	     = dev_cap->max_gids;
+	dev->caps.pkey_table_len     = dev_cap->max_pkeys;
+	dev->caps.local_ca_ack_delay = dev_cap->local_ca_ack_delay;
+	dev->caps.bf_reg_size	     = dev_cap->bf_reg_size;
+	dev->caps.bf_regs_per_page   = dev_cap->bf_regs_per_page;
+	dev->caps.max_sq_sg	     = dev_cap->max_sq_sg;
+	dev->caps.max_rq_sg	     = dev_cap->max_rq_sg;
+	dev->caps.max_wqes	     = dev_cap->max_qp_sz;
+	dev->caps.max_qp_init_rdma   = dev_cap->max_requester_per_qp;
+	dev->caps.reserved_qps	     = dev_cap->reserved_qps;
+	dev->caps.max_srq_wqes	     = dev_cap->max_srq_sz;
+	dev->caps.max_srq_sge	     = dev_cap->max_rq_sg - 1;
+	dev->caps.reserved_srqs	     = dev_cap->reserved_srqs;
+	dev->caps.max_sq_desc_sz     = dev_cap->max_sq_desc_sz;
+	dev->caps.max_rq_desc_sz     = dev_cap->max_rq_desc_sz;
+	dev->caps.num_qp_per_mgm     = MLX4_QP_PER_MGM;
+	/*
+	 * Subtract 1 from the limit because we need to allocate a
+	 * spare CQE so the HCA HW can tell the difference between an
+	 * empty CQ and a full CQ.
+	 */
+	dev->caps.max_cqes	     = dev_cap->max_cq_sz - 1;
+	dev->caps.reserved_cqs	     = dev_cap->reserved_cqs;
+	dev->caps.reserved_eqs	     = dev_cap->reserved_eqs;
+	dev->caps.reserved_mtts	     = dev_cap->reserved_mtts;
+	dev->caps.reserved_mrws	     = dev_cap->reserved_mrws;
+	dev->caps.reserved_uars	     = dev_cap->reserved_uars;
+	dev->caps.reserved_pds	     = dev_cap->reserved_pds;
+	dev->caps.port_width_cap     = dev_cap->max_port_width;
+	dev->caps.mtt_entry_sz	     = MLX4_MTT_ENTRY_PER_SEG * dev_cap->mtt_entry_sz;
+	dev->caps.page_size_cap	     = ~(u32) (dev_cap->min_page_sz - 1);
+	dev->caps.flags		     = dev_cap->flags;
+	dev->caps.stat_rate_support  = dev_cap->stat_rate_support;
+
+	return 0;
+}
+
+static int __devinit mlx4_load_fw(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int err;
+
+	priv->fw.fw_icm = mlx4_alloc_icm(dev, priv->fw.fw_pages,
+					 GFP_HIGHUSER | __GFP_NOWARN);
+	if (!priv->fw.fw_icm) {
+		mlx4_err(dev, "Couldn't allocate FW area, aborting.\n");
+		return -ENOMEM;
+	}
+
+	err = mlx4_MAP_FA(dev, priv->fw.fw_icm);
+	if (err) {
+		mlx4_err(dev, "MAP_FA command failed, aborting.\n");
+		goto err_free;
+	}
+
+	err = mlx4_RUN_FW(dev);
+	if (err) {
+		mlx4_err(dev, "RUN_FW command failed, aborting.\n");
+		goto err_unmap_fa;
+	}
+
+	return 0;
+
+err_unmap_fa:
+	mlx4_UNMAP_FA(dev);
+
+err_free:
+	mlx4_free_icm(dev, priv->fw.fw_icm);
+	return err;
+}
+
+static int __devinit mlx4_init_cmpt_table(struct mlx4_dev *dev, u64 cmpt_base,
+					  int cmpt_entry_sz)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int err;
+
+	err = mlx4_init_icm_table(dev, &priv->qp_table.cmpt_table,
+				  cmpt_base +
+				  ((u64) (MLX4_CMPT_TYPE_QP *
+					  cmpt_entry_sz) << MLX4_CMPT_SHIFT),
+				  cmpt_entry_sz, dev->caps.num_qps,
+				  dev->caps.reserved_qps, 0);
+	if (err)
+		goto err;
+
+	err = mlx4_init_icm_table(dev, &priv->srq_table.cmpt_table,
+				  cmpt_base +
+				  ((u64) (MLX4_CMPT_TYPE_SRQ *
+					  cmpt_entry_sz) << MLX4_CMPT_SHIFT),
+				  cmpt_entry_sz, dev->caps.num_srqs,
+				  dev->caps.reserved_srqs, 0);
+	if (err)
+		goto err_qp;
+
+	err = mlx4_init_icm_table(dev, &priv->cq_table.cmpt_table,
+				  cmpt_base +
+				  ((u64) (MLX4_CMPT_TYPE_CQ *
+					  cmpt_entry_sz) << MLX4_CMPT_SHIFT),
+				  cmpt_entry_sz, dev->caps.num_cqs,
+				  dev->caps.reserved_cqs, 0);
+	if (err)
+		goto err_srq;
+
+	err = mlx4_init_icm_table(dev, &priv->eq_table.cmpt_table,
+				  cmpt_base +
+				  ((u64) (MLX4_CMPT_TYPE_EQ *
+					  cmpt_entry_sz) << MLX4_CMPT_SHIFT),
+				  cmpt_entry_sz,
+				  roundup_pow_of_two(MLX4_NUM_EQ +
+						     dev->caps.reserved_eqs),
+				  MLX4_NUM_EQ + dev->caps.reserved_eqs, 0);
+	if (err)
+		goto err_cq;
+
+	return 0;
+
+err_cq:
+	mlx4_cleanup_icm_table(dev, &priv->cq_table.cmpt_table);
+
+err_srq:
+	mlx4_cleanup_icm_table(dev, &priv->srq_table.cmpt_table);
+
+err_qp:
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.cmpt_table);
+
+err:
+	return err;
+}
+
+static int __devinit mlx4_init_icm(struct mlx4_dev *dev,
+				   struct mlx4_dev_cap *dev_cap,
+				   struct mlx4_init_hca_param *init_hca,
+				   u64 icm_size)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	u64 aux_pages;
+	int err;
+
+	err = mlx4_SET_ICM_SIZE(dev, icm_size, &aux_pages);
+	if (err) {
+		mlx4_err(dev, "SET_ICM_SIZE command failed, aborting.\n");
+		return err;
+	}
+
+	mlx4_dbg(dev, "%lld KB of HCA context requires %lld KB aux memory.\n",
+		 (unsigned long long) icm_size >> 10,
+		 (unsigned long long) aux_pages << 2);
+
+	priv->fw.aux_icm = mlx4_alloc_icm(dev, aux_pages,
+					  GFP_HIGHUSER | __GFP_NOWARN);
+	if (!priv->fw.aux_icm) {
+		mlx4_err(dev, "Couldn't allocate aux memory, aborting.\n");
+		return -ENOMEM;
+	}
+
+	err = mlx4_MAP_ICM_AUX(dev, priv->fw.aux_icm);
+	if (err) {
+		mlx4_err(dev, "MAP_ICM_AUX command failed, aborting.\n");
+		goto err_free_aux;
+	}
+
+	err = mlx4_init_cmpt_table(dev, init_hca->cmpt_base, dev_cap->cmpt_entry_sz);
+	if (err) {
+		mlx4_err(dev, "Failed to map cMPT context memory, aborting.\n");
+		goto err_unmap_aux;
+	}
+
+	err = mlx4_map_eq_icm(dev, init_hca->eqc_base);
+	if (err) {
+		mlx4_err(dev, "Failed to map EQ context memory, aborting.\n");
+		goto err_unmap_cmpt;
+	}
+
+	err = mlx4_init_icm_table(dev, &priv->mr_table.mtt_table,
+				  init_hca->mtt_base,
+				  dev->caps.mtt_entry_sz,
+				  dev->caps.num_mtt_segs,
+				  dev->caps.reserved_mtts, 1);
+	if (err) {
+		mlx4_err(dev, "Failed to map MTT context memory, aborting.\n");
+		goto err_unmap_eq;
+	}
+
+	err = mlx4_init_icm_table(dev, &priv->mr_table.dmpt_table,
+				  init_hca->dmpt_base,
+				  dev_cap->dmpt_entry_sz,
+				  dev->caps.num_mpts,
+				  dev->caps.reserved_mrws, 1);
+	if (err) {
+		mlx4_err(dev, "Failed to map dMPT context memory, aborting.\n");
+		goto err_unmap_mtt;
+	}
+
+	err = mlx4_init_icm_table(dev, &priv->qp_table.qp_table,
+				  init_hca->qpc_base,
+				  dev_cap->qpc_entry_sz,
+				  dev->caps.num_qps,
+				  dev->caps.reserved_qps, 0);
+	if (err) {
+		mlx4_err(dev, "Failed to map QP context memory, aborting.\n");
+		goto err_unmap_dmpt;
+	}
+
+	err = mlx4_init_icm_table(dev, &priv->qp_table.auxc_table,
+				  init_hca->auxc_base,
+				  dev_cap->aux_entry_sz,
+				  dev->caps.num_qps,
+				  dev->caps.reserved_qps, 0);
+	if (err) {
+		mlx4_err(dev, "Failed to map AUXC context memory, aborting.\n");
+		goto err_unmap_qp;
+	}
+
+	err = mlx4_init_icm_table(dev, &priv->qp_table.altc_table,
+				  init_hca->altc_base,
+				  dev_cap->altc_entry_sz,
+				  dev->caps.num_qps,
+				  dev->caps.reserved_qps, 0);
+	if (err) {
+		mlx4_err(dev, "Failed to map ALTC context memory, aborting.\n");
+		goto err_unmap_auxc;
+	}
+
+	err = mlx4_init_icm_table(dev, &priv->qp_table.rdmarc_table,
+				  init_hca->rdmarc_base,
+				  dev_cap->rdmarc_entry_sz << priv->qp_table.rdmarc_shift,
+				  dev->caps.num_qps,
+				  dev->caps.reserved_qps, 0);
+	if (err) {
+		mlx4_err(dev, "Failed to map RDMARC context memory, aborting\n");
+		goto err_unmap_altc;
+	}
+
+	err = mlx4_init_icm_table(dev, &priv->cq_table.table,
+				  init_hca->cqc_base,
+				  dev_cap->cqc_entry_sz,
+				  dev->caps.num_cqs,
+				  dev->caps.reserved_cqs, 0);
+	if (err) {
+		mlx4_err(dev, "Failed to map CQ context memory, aborting.\n");
+		goto err_unmap_rdmarc;
+	}
+
+	err = mlx4_init_icm_table(dev, &priv->srq_table.table,
+				  init_hca->srqc_base,
+				  dev_cap->srq_entry_sz,
+				  dev->caps.num_srqs,
+				  dev->caps.reserved_srqs, 0);
+	if (err) {
+		mlx4_err(dev, "Failed to map SRQ context memory, aborting.\n");
+		goto err_unmap_cq;
+	}
+
+	/*
+	 * It's not strictly required, but for simplicity just map the
+	 * whole multicast group table now.  The table isn't very big
+	 * and it's a lot easier than trying to track ref counts.
+	 */
+	err = mlx4_init_icm_table(dev, &priv->mcg_table.table,
+				  init_hca->mc_base, MLX4_MGM_ENTRY_SIZE,
+				  dev->caps.num_mgms + dev->caps.num_amgms,
+				  dev->caps.num_mgms + dev->caps.num_amgms,
+				  0);
+	if (err) {
+		mlx4_err(dev, "Failed to map MCG context memory, aborting.\n");
+		goto err_unmap_srq;
+	}
+
+	return 0;
+
+err_unmap_srq:
+	mlx4_cleanup_icm_table(dev, &priv->srq_table.table);
+
+err_unmap_cq:
+	mlx4_cleanup_icm_table(dev, &priv->cq_table.table);
+
+err_unmap_rdmarc:
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.rdmarc_table);
+
+err_unmap_altc:
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.altc_table);
+
+err_unmap_auxc:
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.auxc_table);
+
+err_unmap_qp:
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.qp_table);
+
+err_unmap_dmpt:
+	mlx4_cleanup_icm_table(dev, &priv->mr_table.dmpt_table);
+
+err_unmap_mtt:
+	mlx4_cleanup_icm_table(dev, &priv->mr_table.mtt_table);
+
+err_unmap_eq:
+	mlx4_unmap_eq_icm(dev);
+
+err_unmap_cmpt:
+	mlx4_cleanup_icm_table(dev, &priv->eq_table.cmpt_table);
+	mlx4_cleanup_icm_table(dev, &priv->cq_table.cmpt_table);
+	mlx4_cleanup_icm_table(dev, &priv->srq_table.cmpt_table);
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.cmpt_table);
+
+err_unmap_aux:
+	mlx4_UNMAP_ICM_AUX(dev);
+
+err_free_aux:
+	mlx4_free_icm(dev, priv->fw.aux_icm);
+
+	return err;
+}
+
+static void mlx4_free_icms(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+
+	mlx4_cleanup_icm_table(dev, &priv->mcg_table.table);
+	mlx4_cleanup_icm_table(dev, &priv->srq_table.table);
+	mlx4_cleanup_icm_table(dev, &priv->cq_table.table);
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.rdmarc_table);
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.altc_table);
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.auxc_table);
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.qp_table);
+	mlx4_cleanup_icm_table(dev, &priv->mr_table.dmpt_table);
+	mlx4_cleanup_icm_table(dev, &priv->mr_table.mtt_table);
+	mlx4_cleanup_icm_table(dev, &priv->eq_table.cmpt_table);
+	mlx4_cleanup_icm_table(dev, &priv->cq_table.cmpt_table);
+	mlx4_cleanup_icm_table(dev, &priv->srq_table.cmpt_table);
+	mlx4_cleanup_icm_table(dev, &priv->qp_table.cmpt_table);
+	mlx4_unmap_eq_icm(dev);
+
+	mlx4_UNMAP_ICM_AUX(dev);
+	mlx4_free_icm(dev, priv->fw.aux_icm);
+}
+
+static void mlx4_close_hca(struct mlx4_dev *dev)
+{
+	mlx4_CLOSE_HCA(dev, 0);
+	mlx4_free_icms(dev);
+	mlx4_UNMAP_FA(dev);
+	mlx4_free_icm(dev, mlx4_priv(dev)->fw.fw_icm);
+}
+
+static int __devinit mlx4_init_hca(struct mlx4_dev *dev)
+{
+	struct mlx4_priv	  *priv = mlx4_priv(dev);
+	struct mlx4_adapter	   adapter;
+	struct mlx4_dev_cap	   dev_cap;
+	struct mlx4_profile	   profile;
+	struct mlx4_init_hca_param init_hca;
+	u64 icm_size;
+	int err;
+
+	err = mlx4_QUERY_FW(dev);
+	if (err) {
+		mlx4_err(dev, "QUERY_FW command failed, aborting.\n");
+		return err;
+	}
+
+	err = mlx4_load_fw(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to start FW, aborting.\n");
+		return err;
+	}
+
+	err = mlx4_dev_cap(dev, &dev_cap);
+	if (err) {
+		mlx4_err(dev, "QUERY_DEV_CAP command failed, aborting.\n");
+		goto err_stop_fw;
+	}
+
+	profile = default_profile;
+
+	icm_size = mlx4_make_profile(dev, &profile, &dev_cap, &init_hca);
+	if ((long long) icm_size < 0) {
+		err = icm_size;
+		goto err_stop_fw;
+	}
+
+	init_hca.log_uar_sz = ilog2(dev->caps.num_uars);
+
+	err = mlx4_init_icm(dev, &dev_cap, &init_hca, icm_size);
+	if (err)
+		goto err_stop_fw;
+
+	err = mlx4_INIT_HCA(dev, &init_hca);
+	if (err) {
+		mlx4_err(dev, "INIT_HCA command failed, aborting.\n");
+		goto err_free_icm;
+	}
+
+	err = mlx4_QUERY_ADAPTER(dev, &adapter);
+	if (err) {
+		mlx4_err(dev, "QUERY_ADAPTER command failed, aborting.\n");
+		goto err_close;
+	}
+
+	priv->eq_table.inta_pin = adapter.inta_pin;
+	priv->rev_id		= adapter.revision_id;
+	memcpy(priv->board_id, adapter.board_id, sizeof priv->board_id);
+
+	return 0;
+
+err_close:
+	mlx4_close_hca(dev);
+
+err_free_icm:
+	mlx4_free_icms(dev);
+
+err_stop_fw:
+	mlx4_UNMAP_FA(dev);
+	mlx4_free_icm(dev, priv->fw.fw_icm);
+
+	return err;
+}
+
+static int __devinit mlx4_setup_hca(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int err;
+
+	MLX4_INIT_DOORBELL_LOCK(&priv->doorbell_lock);
+
+	err = mlx4_init_uar_table(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to initialize "
+			 "user access region table, aborting.\n");
+		return err;
+	}
+
+	err = mlx4_uar_alloc(dev, &priv->driver_uar);
+	if (err) {
+		mlx4_err(dev, "Failed to allocate driver access region, "
+			 "aborting.\n");
+		goto err_uar_table_free;
+	}
+
+	priv->kar = ioremap(priv->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
+	if (!priv->kar) {
+		mlx4_err(dev, "Couldn't map kernel access region, "
+			 "aborting.\n");
+		err = -ENOMEM;
+		goto err_uar_free;
+	}
+
+	err = mlx4_init_pd_table(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to initialize "
+			 "protection domain table, aborting.\n");
+		goto err_kar_unmap;
+	}
+
+	err = mlx4_init_mr_table(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to initialize "
+			 "memory region table, aborting.\n");
+		goto err_pd_table_free;
+	}
+
+	mlx4_map_catas_buf(dev);
+
+	err = mlx4_init_eq_table(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to initialize "
+			 "event queue table, aborting.\n");
+		goto err_catas_buf;
+	}
+
+	err = mlx4_cmd_use_events(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to switch to event-driven "
+			 "firmware commands, aborting.\n");
+		goto err_eq_table_free;
+	}
+
+	err = mlx4_NOP(dev);
+	if (err) {
+		mlx4_err(dev, "NOP command failed to generate interrupt "
+			 "(IRQ %d), aborting.\n",
+			 priv->eq_table.eq[MLX4_EQ_ASYNC].irq);
+		if (dev->flags & MLX4_FLAG_MSI_X)
+			mlx4_err(dev, "Try again with MSI-X disabled.\n");
+		else
+			mlx4_err(dev, "BIOS or ACPI interrupt routing problem?\n");
+
+		goto err_cmd_poll;
+	}
+
+	mlx4_dbg(dev, "NOP command IRQ test passed\n");
+
+	err = mlx4_init_cq_table(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to initialize "
+			 "completion queue table, aborting.\n");
+		goto err_cmd_poll;
+	}
+
+	err = mlx4_init_srq_table(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to initialize "
+			 "shared receive queue table, aborting.\n");
+		goto err_cq_table_free;
+	}
+
+	err = mlx4_init_qp_table(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to initialize "
+			 "queue pair table, aborting.\n");
+		goto err_srq_table_free;
+	}
+
+	err = mlx4_init_mcg_table(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to initialize "
+			 "multicast group table, aborting.\n");
+		goto err_qp_table_free;
+	}
+
+	return 0;
+
+err_qp_table_free:
+	mlx4_cleanup_qp_table(dev);
+
+err_srq_table_free:
+	mlx4_cleanup_srq_table(dev);
+
+err_cq_table_free:
+	mlx4_cleanup_cq_table(dev);
+
+err_cmd_poll:
+	mlx4_cmd_use_polling(dev);
+
+err_eq_table_free:
+	mlx4_cleanup_eq_table(dev);
+
+err_catas_buf:
+	mlx4_unmap_catas_buf(dev);
+	mlx4_cleanup_mr_table(dev);
+
+err_pd_table_free:
+	mlx4_cleanup_pd_table(dev);
+
+err_kar_unmap:
+	iounmap(priv->kar);
+
+err_uar_free:
+	mlx4_uar_free(dev, &priv->driver_uar);
+
+err_uar_table_free:
+	mlx4_cleanup_uar_table(dev);
+	return err;
+}
+
+static void __devinit mlx4_enable_msi_x(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct msix_entry entries[MLX4_NUM_EQ];
+	int err;
+	int i;
+
+	if (msi_x) {
+		for (i = 0; i < MLX4_NUM_EQ; ++i)
+			entries[i].entry = i;
+
+		err = pci_enable_msix(dev->pdev, entries, ARRAY_SIZE(entries));
+		if (err) {
+			if (err > 0)
+				mlx4_info(dev, "Only %d MSI-X vectors available, "
+					  "not using MSI-X\n", err);
+			goto no_msi;
+		}
+
+		for (i = 0; i < MLX4_NUM_EQ; ++i)
+			priv->eq_table.eq[i].irq = entries[i].vector;
+
+		dev->flags |= MLX4_FLAG_MSI_X;
+		return;
+	}
+
+no_msi:
+	for (i = 0; i < MLX4_NUM_EQ; ++i)
+		priv->eq_table.eq[i].irq = dev->pdev->irq;
+}
+
+static int __devinit mlx4_init_one(struct pci_dev *pdev,
+				   const struct pci_device_id *id)
+{
+	static int mlx4_version_printed;
+	struct mlx4_priv *priv;
+	struct mlx4_dev *dev;
+	int err;
+
+	if (!mlx4_version_printed) {
+		printk(KERN_INFO "%s", mlx4_version);
+		++mlx4_version_printed;
+	}
+
+	printk(KERN_INFO PFX "Initializing %s\n",
+	       pci_name(pdev));
+
+	err = pci_enable_device(pdev);
+	if (err) {
+		dev_err(&pdev->dev, "Cannot enable PCI device, "
+			"aborting.\n");
+		return err;
+	}
+
+	/*
+	 * Check for BARs.  We expect 0: 1MB, 2: 8MB, 4: DDR (may not
+	 * be present)
+	 */
+	if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
+	    pci_resource_len(pdev, 0) != 1 << 20) {
+		dev_err(&pdev->dev, "Missing DCS, aborting.\n");
+		err = -ENODEV;
+		goto err_disable_pdev;
+	}
+	if (!(pci_resource_flags(pdev, 2) & IORESOURCE_MEM)) {
+		dev_err(&pdev->dev, "Missing UAR, aborting.\n");
+		err = -ENODEV;
+		goto err_disable_pdev;
+	}
+
+	err = pci_request_region(pdev, 0, DRV_NAME);
+	if (err) {
+		dev_err(&pdev->dev, "Cannot request control region, aborting.\n");
+		goto err_disable_pdev;
+	}
+
+	err = pci_request_region(pdev, 2, DRV_NAME);
+	if (err) {
+		dev_err(&pdev->dev, "Cannot request UAR region, aborting.\n");
+		goto err_release_bar0;
+	}
+
+	pci_set_master(pdev);
+
+	err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
+	if (err) {
+		dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask.\n");
+		err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+		if (err) {
+			dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n");
+			goto err_release_bar2;
+		}
+	}
+	err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
+	if (err) {
+		dev_warn(&pdev->dev, "Warning: couldn't set 64-bit "
+			 "consistent PCI DMA mask.\n");
+		err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
+		if (err) {
+			dev_err(&pdev->dev, "Can't set consistent PCI DMA mask, "
+				"aborting.\n");
+			goto err_release_bar2;
+		}
+	}
+
+	priv = kzalloc(sizeof *priv, GFP_KERNEL);
+	if (!priv) {
+		dev_err(&pdev->dev, "Device struct alloc failed, "
+			"aborting.\n");
+		err = -ENOMEM;
+		goto err_release_bar2;
+	}
+
+	dev       = &priv->dev;
+	dev->pdev = pdev;
+
+	/*
+	 * Now reset the HCA before we touch the PCI capabilities or
+	 * attempt a firmware command, since a boot ROM may have left
+	 * the HCA in an undefined state.
+	 */
+	err = mlx4_reset(dev);
+	if (err) {
+		mlx4_err(dev, "Failed to reset HCA, aborting.\n");
+		goto err_free_dev;
+	}
+
+	mlx4_enable_msi_x(dev);
+
+	if (mlx4_cmd_init(dev)) {
+		mlx4_err(dev, "Failed to init command interface, aborting.\n");
+		goto err_free_dev;
+	}
+
+	err = mlx4_init_hca(dev);
+	if (err)
+		goto err_cmd;
+
+	err = mlx4_setup_hca(dev);
+	if (err)
+		goto err_close;
+
+	err = mlx4_register_device(dev);
+	if (err)
+		goto err_cleanup;
+
+	pci_set_drvdata(pdev, dev);
+
+	return 0;
+
+err_cleanup:
+	mlx4_cleanup_mcg_table(dev);
+	mlx4_cleanup_qp_table(dev);
+	mlx4_cleanup_srq_table(dev);
+	mlx4_cleanup_cq_table(dev);
+	mlx4_cmd_use_polling(dev);
+	mlx4_cleanup_eq_table(dev);
+
+	mlx4_unmap_catas_buf(dev);
+
+	mlx4_cleanup_mr_table(dev);
+	mlx4_cleanup_pd_table(dev);
+	mlx4_cleanup_uar_table(dev);
+
+err_close:
+	mlx4_close_hca(dev);
+
+err_cmd:
+	mlx4_cmd_cleanup(dev);
+
+err_free_dev:
+	if (dev->flags & MLX4_FLAG_MSI_X)
+		pci_disable_msix(pdev);
+
+	kfree(priv);
+
+err_release_bar2:
+	pci_release_region(pdev, 2);
+
+err_release_bar0:
+	pci_release_region(pdev, 0);
+
+err_disable_pdev:
+	pci_disable_device(pdev);
+	pci_set_drvdata(pdev, NULL);
+	return err;
+}
+
+static void __devexit mlx4_remove_one(struct pci_dev *pdev)
+{
+	struct mlx4_dev  *dev  = pci_get_drvdata(pdev);
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int p;
+
+	if (dev) {
+		mlx4_unregister_device(dev);
+
+		for (p = 1; p <= dev->caps.num_ports; ++p)
+			mlx4_CLOSE_PORT(dev, p);
+
+		mlx4_cleanup_mcg_table(dev);
+		mlx4_cleanup_qp_table(dev);
+		mlx4_cleanup_srq_table(dev);
+		mlx4_cleanup_cq_table(dev);
+		mlx4_cmd_use_polling(dev);
+		mlx4_cleanup_eq_table(dev);
+
+		mlx4_unmap_catas_buf(dev);
+
+		mlx4_cleanup_mr_table(dev);
+		mlx4_cleanup_pd_table(dev);
+
+		iounmap(priv->kar);
+		mlx4_uar_free(dev, &priv->driver_uar);
+		mlx4_cleanup_uar_table(dev);
+		mlx4_close_hca(dev);
+		mlx4_cmd_cleanup(dev);
+
+		if (dev->flags & MLX4_FLAG_MSI_X)
+			pci_disable_msix(pdev);
+
+		kfree(priv);
+		pci_release_region(pdev, 2);
+		pci_release_region(pdev, 0);
+		pci_disable_device(pdev);
+		pci_set_drvdata(pdev, NULL);
+	}
+}
+
+static struct pci_device_id mlx4_pci_table[] = {
+	{ PCI_VDEVICE(MELLANOX, 0x6340) }, /* MT25408 "Hermon" SDR */
+	{ PCI_VDEVICE(MELLANOX, 0x634a) }, /* MT25408 "Hermon" DDR */
+	{ PCI_VDEVICE(MELLANOX, 0x6354) }, /* MT25408 "Hermon" QDR */
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, mlx4_pci_table);
+
+static struct pci_driver mlx4_driver = {
+	.name		= DRV_NAME,
+	.id_table	= mlx4_pci_table,
+	.probe		= mlx4_init_one,
+	.remove		= __devexit_p(mlx4_remove_one)
+};
+
+static int __init mlx4_init(void)
+{
+	int ret;
+
+	ret = pci_register_driver(&mlx4_driver);
+	return ret < 0 ? ret : 0;
+}
+
+static void __exit mlx4_cleanup(void)
+{
+	pci_unregister_driver(&mlx4_driver);
+}
+
+module_init(mlx4_init);
+module_exit(mlx4_cleanup);

drivers/net/mlx4/mcg.c

+/*
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4.h"
+
+struct mlx4_mgm {
+	__be32			next_gid_index;
+	__be32			members_count;
+	u32			reserved[2];
+	u8			gid[16];
+	__be32			qp[MLX4_QP_PER_MGM];
+};
+
+static const u8 zero_gid[16];	/* automatically initialized to 0 */
+
+static int mlx4_READ_MCG(struct mlx4_dev *dev, int index,
+			 struct mlx4_cmd_mailbox *mailbox)
+{
+	return mlx4_cmd_box(dev, 0, mailbox->dma, index, 0, MLX4_CMD_READ_MCG,
+			    MLX4_CMD_TIME_CLASS_A);
+}
+
+static int mlx4_WRITE_MCG(struct mlx4_dev *dev, int index,
+			  struct mlx4_cmd_mailbox *mailbox)
+{
+	return mlx4_cmd(dev, mailbox->dma, index, 0, MLX4_CMD_WRITE_MCG,
+			MLX4_CMD_TIME_CLASS_A);
+}
+
+static int mlx4_MGID_HASH(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+			  u16 *hash)
+{
+	u64 imm;
+	int err;
+
+	err = mlx4_cmd_imm(dev, mailbox->dma, &imm, 0, 0, MLX4_CMD_MGID_HASH,
+			   MLX4_CMD_TIME_CLASS_A);
+
+	if (!err)
+		*hash = imm;
+
+	return err;
+}
+
+/*
+ * Caller must hold MCG table semaphore.  gid and mgm parameters must
+ * be properly aligned for command interface.
+ *
+ *  Returns 0 unless a firmware command error occurs.
+ *
+ * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1
+ * and *mgm holds MGM entry.
+ *
+ * if GID is found in AMGM, *index = index in AMGM, *prev = index of
+ * previous entry in hash chain and *mgm holds AMGM entry.
+ *
+ * If no AMGM exists for given gid, *index = -1, *prev = index of last
+ * entry in hash chain and *mgm holds end of hash chain.
+ */
+static int find_mgm(struct mlx4_dev *dev,
+		    u8 *gid, struct mlx4_cmd_mailbox *mgm_mailbox,
+		    u16 *hash, int *prev, int *index)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+	struct mlx4_mgm *mgm = mgm_mailbox->buf;
+	u8 *mgid;
+	int err;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return -ENOMEM;
+	mgid = mailbox->buf;
+
+	memcpy(mgid, gid, 16);
+
+	err = mlx4_MGID_HASH(dev, mailbox, hash);
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	if (err)
+		return err;
+
+	if (0)
+		mlx4_dbg(dev, "Hash for %04x:%04x:%04x:%04x:"
+			  "%04x:%04x:%04x:%04x is %04x\n",
+			  be16_to_cpu(((__be16 *) gid)[0]),
+			  be16_to_cpu(((__be16 *) gid)[1]),
+			  be16_to_cpu(((__be16 *) gid)[2]),
+			  be16_to_cpu(((__be16 *) gid)[3]),
+			  be16_to_cpu(((__be16 *) gid)[4]),
+			  be16_to_cpu(((__be16 *) gid)[5]),
+			  be16_to_cpu(((__be16 *) gid)[6]),
+			  be16_to_cpu(((__be16 *) gid)[7]),
+			  *hash);
+
+	*index = *hash;
+	*prev  = -1;
+
+	do {
+		err = mlx4_READ_MCG(dev, *index, mgm_mailbox);
+		if (err)
+			return err;
+
+		if (!memcmp(mgm->gid, zero_gid, 16)) {
+			if (*index != *hash) {
+				mlx4_err(dev, "Found zero MGID in AMGM.\n");
+				err = -EINVAL;
+			}
+			return err;
+		}
+
+		if (!memcmp(mgm->gid, gid, 16))
+			return err;
+
+		*prev = *index;
+		*index = be32_to_cpu(mgm->next_gid_index) >> 6;
+	} while (*index);
+
+	*index = -1;
+	return err;
+}
+
+int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16])
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_cmd_mailbox *mailbox;
+	struct mlx4_mgm *mgm;
+	u32 members_count;
+	u16 hash;
+	int index, prev;
+	int link = 0;
+	int i;
+	int err;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+	mgm = mailbox->buf;
+
+	mutex_lock(&priv->mcg_table.mutex);
+
+	err = find_mgm(dev, gid, mailbox, &hash, &prev, &index);
+	if (err)
+		goto out;
+
+	if (index != -1) {
+		if (!memcmp(mgm->gid, zero_gid, 16))
+			memcpy(mgm->gid, gid, 16);
+	} else {
+		link = 1;
+
+		index = mlx4_bitmap_alloc(&priv->mcg_table.bitmap);
+		if (index == -1) {
+			mlx4_err(dev, "No AMGM entries left\n");
+			err = -ENOMEM;
+			goto out;
+		}
+		index += dev->caps.num_mgms;
+
+		err = mlx4_READ_MCG(dev, index, mailbox);
+		if (err)
+			goto out;
+
+		memset(mgm, 0, sizeof *mgm);
+		memcpy(mgm->gid, gid, 16);
+	}
+
+	members_count = be32_to_cpu(mgm->members_count);
+	if (members_count == MLX4_QP_PER_MGM) {
+		mlx4_err(dev, "MGM at index %x is full.\n", index);
+		err = -ENOMEM;
+		goto out;
+	}
+
+	for (i = 0; i < members_count; ++i)
+		if (mgm->qp[i] == cpu_to_be32(qp->qpn)) {
+			mlx4_dbg(dev, "QP %06x already a member of MGM\n", qp->qpn);
+			err = 0;
+			goto out;
+		}
+
+	mgm->qp[members_count++] = cpu_to_be32(qp->qpn);
+	mgm->members_count       = cpu_to_be32(members_count);
+
+	err = mlx4_WRITE_MCG(dev, index, mailbox);
+	if (err)
+		goto out;
+
+	if (!link)
+		goto out;
+
+	err = mlx4_READ_MCG(dev, prev, mailbox);
+	if (err)
+		goto out;
+
+	mgm->next_gid_index = cpu_to_be32(index << 6);
+
+	err = mlx4_WRITE_MCG(dev, prev, mailbox);
+	if (err)
+		goto out;
+
+out:
+	if (err && link && index != -1) {
+		if (index < dev->caps.num_mgms)
+			mlx4_warn(dev, "Got AMGM index %d < %d",
+				  index, dev->caps.num_mgms);
+		else
+			mlx4_bitmap_free(&priv->mcg_table.bitmap,
+					 index - dev->caps.num_mgms);
+	}
+	mutex_unlock(&priv->mcg_table.mutex);
+
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_multicast_attach);
+
+int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16])
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_cmd_mailbox *mailbox;
+	struct mlx4_mgm *mgm;
+	u32 members_count;
+	u16 hash;
+	int prev, index;
+	int i, loc;
+	int err;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+	mgm = mailbox->buf;
+
+	mutex_lock(&priv->mcg_table.mutex);
+
+	err = find_mgm(dev, gid, mailbox, &hash, &prev, &index);
+	if (err)
+		goto out;
+
+	if (index == -1) {
+		mlx4_err(dev, "MGID %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x "
+			  "not found\n",
+			  be16_to_cpu(((__be16 *) gid)[0]),
+			  be16_to_cpu(((__be16 *) gid)[1]),
+			  be16_to_cpu(((__be16 *) gid)[2]),
+			  be16_to_cpu(((__be16 *) gid)[3]),
+			  be16_to_cpu(((__be16 *) gid)[4]),
+			  be16_to_cpu(((__be16 *) gid)[5]),
+			  be16_to_cpu(((__be16 *) gid)[6]),
+			  be16_to_cpu(((__be16 *) gid)[7]));
+		err = -EINVAL;
+		goto out;
+	}
+
+	members_count = be32_to_cpu(mgm->members_count);
+	for (loc = -1, i = 0; i < members_count; ++i)
+		if (mgm->qp[i] == cpu_to_be32(qp->qpn))
+			loc = i;
+
+	if (loc == -1) {
+		mlx4_err(dev, "QP %06x not found in MGM\n", qp->qpn);
+		err = -EINVAL;
+		goto out;
+	}
+
+
+	mgm->members_count = cpu_to_be32(--members_count);
+	mgm->qp[loc]       = mgm->qp[i - 1];
+	mgm->qp[i - 1]     = 0;
+
+	err = mlx4_WRITE_MCG(dev, index, mailbox);
+	if (err)
+		goto out;
+
+	if (i != 1)
+		goto out;
+
+	if (prev == -1) {
+		/* Remove entry from MGM */
+		int amgm_index = be32_to_cpu(mgm->next_gid_index) >> 6;
+		if (amgm_index) {
+			err = mlx4_READ_MCG(dev, amgm_index, mailbox);
+			if (err)
+				goto out;
+		} else
+			memset(mgm->gid, 0, 16);
+
+		err = mlx4_WRITE_MCG(dev, index, mailbox);
+		if (err)
+			goto out;
+
+		if (amgm_index) {
+			if (amgm_index < dev->caps.num_mgms)
+				mlx4_warn(dev, "MGM entry %d had AMGM index %d < %d",
+					  index, amgm_index, dev->caps.num_mgms);
+			else
+				mlx4_bitmap_free(&priv->mcg_table.bitmap,
+						 amgm_index - dev->caps.num_mgms);
+		}
+	} else {
+		/* Remove entry from AMGM */
+		int cur_next_index = be32_to_cpu(mgm->next_gid_index) >> 6;
+		err = mlx4_READ_MCG(dev, prev, mailbox);
+		if (err)
+			goto out;
+
+		mgm->next_gid_index = cpu_to_be32(cur_next_index << 6);
+
+		err = mlx4_WRITE_MCG(dev, prev, mailbox);
+		if (err)
+			goto out;
+
+		if (index < dev->caps.num_mgms)
+			mlx4_warn(dev, "entry %d had next AMGM index %d < %d",
+				  prev, index, dev->caps.num_mgms);
+		else
+			mlx4_bitmap_free(&priv->mcg_table.bitmap,
+					 index - dev->caps.num_mgms);
+	}
+
+out:
+	mutex_unlock(&priv->mcg_table.mutex);
+
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_multicast_detach);
+
+int __devinit mlx4_init_mcg_table(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int err;
+
+	err = mlx4_bitmap_init(&priv->mcg_table.bitmap,
+			       dev->caps.num_amgms, dev->caps.num_amgms - 1, 0);
+	if (err)
+		return err;
+
+	mutex_init(&priv->mcg_table.mutex);
+
+	return 0;
+}
+
+void mlx4_cleanup_mcg_table(struct mlx4_dev *dev)
+{
+	mlx4_bitmap_cleanup(&mlx4_priv(dev)->mcg_table.bitmap);
+}

drivers/net/mlx4/mlx4.h

+/*
+ * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_H
+#define MLX4_H
+
+#include <linux/radix-tree.h>
+
+#include <linux/mlx4/device.h>
+#include <linux/mlx4/doorbell.h>
+
+#define DRV_NAME	"mlx4_core"
+#define PFX		DRV_NAME ": "
+#define DRV_VERSION	"0.01"
+#define DRV_RELDATE	"May 1, 2007"
+
+enum {
+	MLX4_HCR_BASE		= 0x80680,
+	MLX4_HCR_SIZE		= 0x0001c,
+	MLX4_CLR_INT_SIZE	= 0x00008
+};
+
+enum {
+	MLX4_BOARD_ID_LEN	= 64
+};
+
+enum {
+	MLX4_MGM_ENTRY_SIZE	=  0x40,
+	MLX4_QP_PER_MGM		= 4 * (MLX4_MGM_ENTRY_SIZE / 16 - 2),
+	MLX4_MTT_ENTRY_PER_SEG	= 8
+};
+
+enum {
+	MLX4_EQ_ASYNC,
+	MLX4_EQ_COMP,
+	MLX4_EQ_CATAS,
+	MLX4_NUM_EQ
+};
+
+enum {
+	MLX4_NUM_PDS		= 1 << 15
+};
+
+enum {
+	MLX4_CMPT_TYPE_QP	= 0,
+	MLX4_CMPT_TYPE_SRQ	= 1,
+	MLX4_CMPT_TYPE_CQ	= 2,
+	MLX4_CMPT_TYPE_EQ	= 3,
+	MLX4_CMPT_NUM_TYPE
+};
+
+enum {
+	MLX4_CMPT_SHIFT		= 24,
+	MLX4_NUM_CMPTS		= MLX4_CMPT_NUM_TYPE << MLX4_CMPT_SHIFT
+};
+
+#ifdef CONFIG_MLX4_DEBUG
+extern int mlx4_debug_level;
+
+#define mlx4_dbg(mdev, format, arg...)					\
+	do {								\
+		if (mlx4_debug_level)					\
+			dev_printk(KERN_DEBUG, &mdev->pdev->dev, format, ## arg); \
+	} while (0)
+
+#else /* CONFIG_MLX4_DEBUG */
+
+#define mlx4_dbg(mdev, format, arg...) do { (void) mdev; } while (0)
+
+#endif /* CONFIG_MLX4_DEBUG */
+
+#define mlx4_err(mdev, format, arg...) \
+	dev_err(&mdev->pdev->dev, format, ## arg)
+#define mlx4_info(mdev, format, arg...) \
+	dev_info(&mdev->pdev->dev, format, ## arg)
+#define mlx4_warn(mdev, format, arg...) \
+	dev_warn(&mdev->pdev->dev, format, ## arg)
+
+struct mlx4_bitmap {
+	u32			last;
+	u32			top;
+	u32			max;
+	u32			mask;
+	spinlock_t		lock;
+	unsigned long	       *table;
+};
+
+struct mlx4_buddy {
+	unsigned long	      **bits;
+	int			max_order;
+	spinlock_t		lock;
+};
+
+struct mlx4_icm;
+
+struct mlx4_icm_table {
+	u64			virt;
+	int			num_icm;
+	int			num_obj;
+	int			obj_size;
+	int			lowmem;
+	struct mutex		mutex;
+	struct mlx4_icm	      **icm;
+};
+
+struct mlx4_eq {
+	struct mlx4_dev	       *dev;
+	void __iomem	       *doorbell;
+	int			eqn;
+	u32			cons_index;
+	u16			irq;
+	u16			have_irq;
+	int			nent;
+	struct mlx4_buf_list   *page_list;
+	struct mlx4_mtt		mtt;
+};
+
+struct mlx4_profile {
+	int			num_qp;
+	int			rdmarc_per_qp;
+	int			num_srq;
+	int			num_cq;
+	int			num_mcg;
+	int			num_mpt;
+	int			num_mtt;
+};
+
+struct mlx4_fw {
+	u64			clr_int_base;
+	u64			catas_offset;
+	struct mlx4_icm	       *fw_icm;
+	struct mlx4_icm	       *aux_icm;
+	u32			catas_size;
+	u16			fw_pages;
+	u8			clr_int_bar;
+	u8			catas_bar;
+};
+
+struct mlx4_cmd {
+	struct pci_pool	       *pool;
+	void __iomem	       *hcr;
+	struct mutex		hcr_mutex;
+	struct semaphore	poll_sem;
+	struct semaphore	event_sem;
+	int			max_cmds;
+	spinlock_t		context_lock;
+	int			free_head;
+	struct mlx4_cmd_context *context;
+	u16			token_mask;
+	u8			use_events;
+	u8			toggle;
+};
+
+struct mlx4_uar_table {
+	struct mlx4_bitmap	bitmap;
+};
+
+struct mlx4_mr_table {
+	struct mlx4_bitmap	mpt_bitmap;
+	struct mlx4_buddy	mtt_buddy;
+	u64			mtt_base;
+	u64			mpt_base;
+	struct mlx4_icm_table	mtt_table;
+	struct mlx4_icm_table	dmpt_table;
+};
+
+struct mlx4_cq_table {
+	struct mlx4_bitmap	bitmap;
+	spinlock_t		lock;
+	struct radix_tree_root	tree;
+	struct mlx4_icm_table	table;
+	struct mlx4_icm_table	cmpt_table;
+};
+
+struct mlx4_eq_table {
+	struct mlx4_bitmap	bitmap;
+	void __iomem	       *clr_int;
+	void __iomem	       *uar_map[(MLX4_NUM_EQ + 6) / 4];
+	u32			clr_mask;
+	struct mlx4_eq		eq[MLX4_NUM_EQ];
+	u64			icm_virt;
+	struct page	       *icm_page;
+	dma_addr_t		icm_dma;
+	struct mlx4_icm_table	cmpt_table;
+	int			have_irq;
+	u8			inta_pin;
+};
+
+struct mlx4_srq_table {
+	struct mlx4_bitmap	bitmap;
+	spinlock_t		lock;
+	struct radix_tree_root	tree;
+	struct mlx4_icm_table	table;
+	struct mlx4_icm_table	cmpt_table;
+};
+
+struct mlx4_qp_table {
+	struct mlx4_bitmap	bitmap;
+	u32			rdmarc_base;
+	int			rdmarc_shift;
+	spinlock_t		lock;
+	struct mlx4_icm_table	qp_table;
+	struct mlx4_icm_table	auxc_table;
+	struct mlx4_icm_table	altc_table;
+	struct mlx4_icm_table	rdmarc_table;
+	struct mlx4_icm_table	cmpt_table;
+};
+
+struct mlx4_mcg_table {
+	struct mutex		mutex;
+	struct mlx4_bitmap	bitmap;
+	struct mlx4_icm_table	table;
+};
+
+struct mlx4_catas_err {
+	u32 __iomem	       *map;
+	int			size;
+};
+
+struct mlx4_priv {
+	struct mlx4_dev		dev;
+
+	struct list_head	dev_list;
+	struct list_head	ctx_list;
+	spinlock_t		ctx_lock;
+
+	struct mlx4_fw		fw;
+	struct mlx4_cmd		cmd;
+
+	struct mlx4_bitmap	pd_bitmap;
+	struct mlx4_uar_table	uar_table;
+	struct mlx4_mr_table	mr_table;
+	struct mlx4_cq_table	cq_table;
+	struct mlx4_eq_table	eq_table;
+	struct mlx4_srq_table	srq_table;
+	struct mlx4_qp_table	qp_table;
+	struct mlx4_mcg_table	mcg_table;
+
+	struct mlx4_catas_err	catas_err;
+
+	void __iomem	       *clr_base;
+
+	struct mlx4_uar		driver_uar;
+	void __iomem	       *kar;
+	MLX4_DECLARE_DOORBELL_LOCK(doorbell_lock)
+
+	u32			rev_id;
+	char			board_id[MLX4_BOARD_ID_LEN];
+};
+
+static inline struct mlx4_priv *mlx4_priv(struct mlx4_dev *dev)
+{
+	return container_of(dev, struct mlx4_priv, dev);
+}
+
+u32 mlx4_bitmap_alloc(struct mlx4_bitmap *bitmap);
+void mlx4_bitmap_free(struct mlx4_bitmap *bitmap, u32 obj);
+int mlx4_bitmap_init(struct mlx4_bitmap *bitmap, u32 num, u32 mask, u32 reserved);
+void mlx4_bitmap_cleanup(struct mlx4_bitmap *bitmap);
+
+int mlx4_reset(struct mlx4_dev *dev);
+
+int mlx4_init_pd_table(struct mlx4_dev *dev);
+int mlx4_init_uar_table(struct mlx4_dev *dev);
+int mlx4_init_mr_table(struct mlx4_dev *dev);
+int mlx4_init_eq_table(struct mlx4_dev *dev);
+int mlx4_init_cq_table(struct mlx4_dev *dev);
+int mlx4_init_qp_table(struct mlx4_dev *dev);
+int mlx4_init_srq_table(struct mlx4_dev *dev);
+int mlx4_init_mcg_table(struct mlx4_dev *dev);
+
+void mlx4_cleanup_pd_table(struct mlx4_dev *dev);
+void mlx4_cleanup_uar_table(struct mlx4_dev *dev);
+void mlx4_cleanup_mr_table(struct mlx4_dev *dev);
+void mlx4_cleanup_eq_table(struct mlx4_dev *dev);
+void mlx4_cleanup_cq_table(struct mlx4_dev *dev);
+void mlx4_cleanup_qp_table(struct mlx4_dev *dev);
+void mlx4_cleanup_srq_table(struct mlx4_dev *dev);
+void mlx4_cleanup_mcg_table(struct mlx4_dev *dev);
+
+void mlx4_map_catas_buf(struct mlx4_dev *dev);
+void mlx4_unmap_catas_buf(struct mlx4_dev *dev);
+
+int mlx4_register_device(struct mlx4_dev *dev);
+void mlx4_unregister_device(struct mlx4_dev *dev);
+void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_event type,
+			 int subtype, int port);
+
+struct mlx4_dev_cap;
+struct mlx4_init_hca_param;
+
+u64 mlx4_make_profile(struct mlx4_dev *dev,
+		      struct mlx4_profile *request,
+		      struct mlx4_dev_cap *dev_cap,
+		      struct mlx4_init_hca_param *init_hca);
+
+int mlx4_map_eq_icm(struct mlx4_dev *dev, u64 icm_virt);
+void mlx4_unmap_eq_icm(struct mlx4_dev *dev);
+
+int mlx4_cmd_init(struct mlx4_dev *dev);
+void mlx4_cmd_cleanup(struct mlx4_dev *dev);
+void mlx4_cmd_event(struct mlx4_dev *dev, u16 token, u8 status, u64 out_param);
+int mlx4_cmd_use_events(struct mlx4_dev *dev);
+void mlx4_cmd_use_polling(struct mlx4_dev *dev);
+
+void mlx4_cq_completion(struct mlx4_dev *dev, u32 cqn);
+void mlx4_cq_event(struct mlx4_dev *dev, u32 cqn, int event_type);
+
+void mlx4_qp_event(struct mlx4_dev *dev, u32 qpn, int event_type);
+
+void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type);
+
+void mlx4_handle_catas_err(struct mlx4_dev *dev);
+
+#endif /* MLX4_H */

drivers/net/mlx4/mr.c

+/*
+ * Copyright (c) 2004 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4.h"
+#include "icm.h"
+
+/*
+ * Must be packed because mtt_seg is 64 bits but only aligned to 32 bits.
+ */
+struct mlx4_mpt_entry {
+	__be32 flags;
+	__be32 qpn;
+	__be32 key;
+	__be32 pd;
+	__be64 start;
+	__be64 length;
+	__be32 lkey;
+	__be32 win_cnt;
+	u8	reserved1[3];
+	u8	mtt_rep;
+	__be64 mtt_seg;
+	__be32 mtt_sz;
+	__be32 entity_size;
+	__be32 first_byte_offset;
+} __attribute__((packed));
+
+#define MLX4_MPT_FLAG_SW_OWNS	    (0xfUL << 28)
+#define MLX4_MPT_FLAG_MIO	    (1 << 17)
+#define MLX4_MPT_FLAG_BIND_ENABLE   (1 << 15)
+#define MLX4_MPT_FLAG_PHYSICAL	    (1 <<  9)
+#define MLX4_MPT_FLAG_REGION	    (1 <<  8)
+
+#define MLX4_MTT_FLAG_PRESENT		1
+
+static u32 mlx4_buddy_alloc(struct mlx4_buddy *buddy, int order)
+{
+	int o;
+	int m;
+	u32 seg;
+
+	spin_lock(&buddy->lock);
+
+	for (o = order; o <= buddy->max_order; ++o) {
+		m = 1 << (buddy->max_order - o);
+		seg = find_first_bit(buddy->bits[o], m);
+		if (seg < m)
+			goto found;
+	}
+
+	spin_unlock(&buddy->lock);
+	return -1;
+
+ found:
+	clear_bit(seg, buddy->bits[o]);
+
+	while (o > order) {
+		--o;
+		seg <<= 1;
+		set_bit(seg ^ 1, buddy->bits[o]);
+	}
+
+	spin_unlock(&buddy->lock);
+
+	seg <<= order;
+
+	return seg;
+}
+
+static void mlx4_buddy_free(struct mlx4_buddy *buddy, u32 seg, int order)
+{
+	seg >>= order;
+
+	spin_lock(&buddy->lock);
+
+	while (test_bit(seg ^ 1, buddy->bits[order])) {
+		clear_bit(seg ^ 1, buddy->bits[order]);
+		seg >>= 1;
+		++order;
+	}
+
+	set_bit(seg, buddy->bits[order]);
+
+	spin_unlock(&buddy->lock);
+}
+
+static int __devinit mlx4_buddy_init(struct mlx4_buddy *buddy, int max_order)
+{
+	int i, s;
+
+	buddy->max_order = max_order;
+	spin_lock_init(&buddy->lock);
+
+	buddy->bits = kzalloc((buddy->max_order + 1) * sizeof (long *),
+			      GFP_KERNEL);
+	if (!buddy->bits)
+		goto err_out;
+
+	for (i = 0; i <= buddy->max_order; ++i) {
+		s = BITS_TO_LONGS(1 << (buddy->max_order - i));
+		buddy->bits[i] = kmalloc(s * sizeof (long), GFP_KERNEL);
+		if (!buddy->bits[i])
+			goto err_out_free;
+		bitmap_zero(buddy->bits[i], 1 << (buddy->max_order - i));
+	}
+
+	set_bit(0, buddy->bits[buddy->max_order]);
+
+	return 0;
+
+err_out_free:
+	for (i = 0; i <= buddy->max_order; ++i)
+		kfree(buddy->bits[i]);
+
+	kfree(buddy->bits);
+
+err_out:
+	return -ENOMEM;
+}
+
+static void mlx4_buddy_cleanup(struct mlx4_buddy *buddy)
+{
+	int i;
+
+	for (i = 0; i <= buddy->max_order; ++i)
+		kfree(buddy->bits[i]);
+
+	kfree(buddy->bits);
+}
+
+static u32 mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order)
+{
+	struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table;
+	u32 seg;
+
+	seg = mlx4_buddy_alloc(&mr_table->mtt_buddy, order);
+	if (seg == -1)
+		return -1;
+
+	if (mlx4_table_get_range(dev, &mr_table->mtt_table, seg,
+				 seg + (1 << order) - 1)) {
+		mlx4_buddy_free(&mr_table->mtt_buddy, seg, order);
+		return -1;
+	}
+
+	return seg;
+}
+
+int mlx4_mtt_init(struct mlx4_dev *dev, int npages, int page_shift,
+		  struct mlx4_mtt *mtt)
+{
+	int i;
+
+	if (!npages) {
+		mtt->order      = -1;
+		mtt->page_shift = MLX4_ICM_PAGE_SHIFT;
+		return 0;
+	} else
+		mtt->page_shift = page_shift;
+
+	for (mtt->order = 0, i = MLX4_MTT_ENTRY_PER_SEG; i < npages; i <<= 1)
+		++mtt->order;
+
+	mtt->first_seg = mlx4_alloc_mtt_range(dev, mtt->order);
+	if (mtt->first_seg == -1)
+		return -ENOMEM;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_mtt_init);
+
+void mlx4_mtt_cleanup(struct mlx4_dev *dev, struct mlx4_mtt *mtt)
+{
+	struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table;
+
+	if (mtt->order < 0)
+		return;
+
+	mlx4_buddy_free(&mr_table->mtt_buddy, mtt->first_seg, mtt->order);
+	mlx4_table_put_range(dev, &mr_table->mtt_table, mtt->first_seg,
+			     mtt->first_seg + (1 << mtt->order) - 1);
+}
+EXPORT_SYMBOL_GPL(mlx4_mtt_cleanup);
+
+u64 mlx4_mtt_addr(struct mlx4_dev *dev, struct mlx4_mtt *mtt)
+{
+	return (u64) mtt->first_seg * dev->caps.mtt_entry_sz;
+}
+EXPORT_SYMBOL_GPL(mlx4_mtt_addr);
+
+static u32 hw_index_to_key(u32 ind)
+{
+	return (ind >> 24) | (ind << 8);
+}
+
+static u32 key_to_hw_index(u32 key)
+{
+	return (key << 24) | (key >> 8);
+}
+
+static int mlx4_SW2HW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+			  int mpt_index)
+{
+	return mlx4_cmd(dev, mailbox->dma, mpt_index, 0, MLX4_CMD_SW2HW_MPT,
+			MLX4_CMD_TIME_CLASS_B);
+}
+
+static int mlx4_HW2SW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+			  int mpt_index)
+{
+	return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, mpt_index,
+			    !mailbox, MLX4_CMD_HW2SW_MPT, MLX4_CMD_TIME_CLASS_B);
+}
+
+int mlx4_mr_alloc(struct mlx4_dev *dev, u32 pd, u64 iova, u64 size, u32 access,
+		  int npages, int page_shift, struct mlx4_mr *mr)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	u32 index;
+	int err;
+
+	index = mlx4_bitmap_alloc(&priv->mr_table.mpt_bitmap);
+	if (index == -1) {
+		err = -ENOMEM;
+		goto err;
+	}
+
+	mr->iova       = iova;
+	mr->size       = size;
+	mr->pd	       = pd;
+	mr->access     = access;
+	mr->enabled    = 0;
+	mr->key	       = hw_index_to_key(index);
+
+	err = mlx4_mtt_init(dev, npages, page_shift, &mr->mtt);
+	if (err)
+		goto err_index;
+
+	return 0;
+
+err_index:
+	mlx4_bitmap_free(&priv->mr_table.mpt_bitmap, index);
+
+err:
+	kfree(mr);
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_alloc);
+
+void mlx4_mr_free(struct mlx4_dev *dev, struct mlx4_mr *mr)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	int err;
+
+	if (mr->enabled) {
+		err = mlx4_HW2SW_MPT(dev, NULL,
+				     key_to_hw_index(mr->key) &
+				     (dev->caps.num_mpts - 1));
+		if (err)
+			mlx4_warn(dev, "HW2SW_MPT failed (%d)\n", err);
+	}
+
+	mlx4_mtt_cleanup(dev, &mr->mtt);
+	mlx4_bitmap_free(&priv->mr_table.mpt_bitmap, key_to_hw_index(mr->key));
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_free);
+
+int mlx4_mr_enable(struct mlx4_dev *dev, struct mlx4_mr *mr)
+{
+	struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table;
+	struct mlx4_cmd_mailbox *mailbox;
+	struct mlx4_mpt_entry *mpt_entry;
+	int err;
+
+	err = mlx4_table_get(dev, &mr_table->dmpt_table, key_to_hw_index(mr->key));
+	if (err)
+		return err;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox)) {
+		err = PTR_ERR(mailbox);
+		goto err_table;
+	}
+	mpt_entry = mailbox->buf;
+
+	memset(mpt_entry, 0, sizeof *mpt_entry);
+
+	mpt_entry->flags = cpu_to_be32(MLX4_MPT_FLAG_SW_OWNS	 |
+				       MLX4_MPT_FLAG_MIO	 |
+				       MLX4_MPT_FLAG_REGION	 |
+				       mr->access);
+	if (mr->mtt.order < 0)
+		mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_PHYSICAL);
+
+	mpt_entry->key	       = cpu_to_be32(key_to_hw_index(mr->key));
+	mpt_entry->pd	       = cpu_to_be32(mr->pd);
+	mpt_entry->start       = cpu_to_be64(mr->iova);
+	mpt_entry->length      = cpu_to_be64(mr->size);
+	mpt_entry->entity_size = cpu_to_be32(mr->mtt.page_shift);
+	mpt_entry->mtt_seg     = cpu_to_be64(mlx4_mtt_addr(dev, &mr->mtt));
+
+	err = mlx4_SW2HW_MPT(dev, mailbox,
+			     key_to_hw_index(mr->key) & (dev->caps.num_mpts - 1));
+	if (err) {
+		mlx4_warn(dev, "SW2HW_MPT failed (%d)\n", err);
+		goto err_cmd;
+	}
+
+	mr->enabled = 1;
+
+	mlx4_free_cmd_mailbox(dev, mailbox);
+
+	return 0;
+
+err_cmd:
+	mlx4_free_cmd_mailbox(dev, mailbox);
+
+err_table:
+	mlx4_table_put(dev, &mr_table->dmpt_table, key_to_hw_index(mr->key));
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_mr_enable);
+
+static int mlx4_WRITE_MTT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+			  int num_mtt)
+{
+	return mlx4_cmd(dev, mailbox->dma, num_mtt, 0, MLX4_CMD_WRITE_MTT,
+			MLX4_CMD_TIME_CLASS_B);
+}
+
+int mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
+		   int start_index, int npages, u64 *page_list)
+{
+	struct mlx4_cmd_mailbox *mailbox;
+	__be64 *mtt_entry;
+	int i;
+	int err = 0;
+
+	if (mtt->order < 0)
+		return -EINVAL;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+
+	mtt_entry = mailbox->buf;
+
+	while (npages > 0) {
+		mtt_entry[0] = cpu_to_be64(mlx4_mtt_addr(dev, mtt) + start_index * 8);
+		mtt_entry[1] = 0;
+
+		for (i = 0; i < npages && i < MLX4_MAILBOX_SIZE / 8 - 2; ++i)
+			mtt_entry[i + 2] = cpu_to_be64(page_list[i] |
+						       MLX4_MTT_FLAG_PRESENT);
+
+		/*
+		 * If we have an odd number of entries to write, add
+		 * one more dummy entry for firmware efficiency.
+		 */
+		if (i & 1)
+			mtt_entry[i + 2] = 0;
+
+		err = mlx4_WRITE_MTT(dev, mailbox, (i + 1) & ~1);
+		if (err)
+			goto out;
+
+		npages      -= i;
+		start_index += i;
+		page_list   += i;
+	}
+
+out:
+	mlx4_free_cmd_mailbox(dev, mailbox);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_write_mtt);
+
+int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
+		       struct mlx4_buf *buf)
+{
+	u64 *page_list;
+	int err;
+	int i;
+
+	page_list = kmalloc(buf->npages * sizeof *page_list, GFP_KERNEL);
+	if (!page_list)
+		return -ENOMEM;
+
+	for (i = 0; i < buf->npages; ++i)
+		if (buf->nbufs == 1)
+			page_list[i] = buf->u.direct.map + (i << buf->page_shift);
+		else
+			page_list[i] = buf->u.page_list[i].map;
+
+	err = mlx4_write_mtt(dev, mtt, 0, buf->npages, page_list);
+
+	kfree(page_list);
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_buf_write_mtt);
+
+int __devinit mlx4_init_mr_table(struct mlx4_dev *dev)
+{
+	struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table;
+	int err;
+
+	err = mlx4_bitmap_init(&mr_table->mpt_bitmap, dev->caps.num_mpts,
+			       ~0, dev->caps.reserved_mrws);
+	if (err)
+		return err;
+
+	err = mlx4_buddy_init(&mr_table->mtt_buddy,
+			      ilog2(dev->caps.num_mtt_segs));
+	if (err)
+		goto err_buddy;
+
+	if (dev->caps.reserved_mtts) {
+		if (mlx4_alloc_mtt_range(dev, ilog2(dev->caps.reserved_mtts)) == -1) {
+			mlx4_warn(dev, "MTT table of order %d is too small.\n",
+				  mr_table->mtt_buddy.max_order);
+			err = -ENOMEM;
+			goto err_reserve_mtts;
+		}
+	}
+
+	return 0;
+
+err_reserve_mtts:
+	mlx4_buddy_cleanup(&mr_table->mtt_buddy);
+
+err_buddy:
+	mlx4_bitmap_cleanup(&mr_table->mpt_bitmap);
+
+	return err;
+}
+
+void mlx4_cleanup_mr_table(struct mlx4_dev *dev)
+{
+	struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table;
+
+	mlx4_buddy_cleanup(&mr_table->mtt_buddy);
+	mlx4_bitmap_cleanup(&mr_table->mpt_bitmap);
+}

drivers/net/mlx4/pd.c

+/*
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+
+#include <asm/page.h>
+
+#include "mlx4.h"
+#include "icm.h"
+
+int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+
+	*pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
+	if (*pdn == -1)
+		return -ENOMEM;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
+
+void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
+{
+	mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
+}
+EXPORT_SYMBOL_GPL(mlx4_pd_free);
+
+int __devinit mlx4_init_pd_table(struct mlx4_dev *dev)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+
+	return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
+				(1 << 24) - 1, dev->caps.reserved_pds);
+}
+
+void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
+{
+	mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
+}
+
+
+int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
+{
+	uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
+	if (uar->index == -1)
+		return -ENOMEM;
+
+	uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
+
+void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
+{
+	mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
+}
+EXPORT_SYMBOL_GPL(mlx4_uar_free);
+
+int mlx4_init_uar_table(struct mlx4_dev *dev)
+{
+	return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
+				dev->caps.num_uars, dev->caps.num_uars - 1,
+				max(128, dev->caps.reserved_uars));
+}
+
+void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
+{
+	mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);
+}

drivers/net/mlx4/profile.c

+/*
+ * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+
+#include "mlx4.h"
+#include "fw.h"
+
+enum {
+	MLX4_RES_QP,
+	MLX4_RES_RDMARC,
+	MLX4_RES_ALTC,
+	MLX4_RES_AUXC,
+	MLX4_RES_SRQ,
+	MLX4_RES_CQ,
+	MLX4_RES_EQ,
+	MLX4_RES_DMPT,
+	MLX4_RES_CMPT,
+	MLX4_RES_MTT,
+	MLX4_RES_MCG,
+	MLX4_RES_NUM
+};
+
+static const char *res_name[] = {
+	[MLX4_RES_QP]		= "QP",
+	[MLX4_RES_RDMARC]	= "RDMARC",
+	[MLX4_RES_ALTC]		= "ALTC",
+	[MLX4_RES_AUXC]		= "AUXC",
+	[MLX4_RES_SRQ]		= "SRQ",
+	[MLX4_RES_CQ]		= "CQ",
+	[MLX4_RES_EQ]		= "EQ",
+	[MLX4_RES_DMPT]		= "DMPT",
+	[MLX4_RES_CMPT]		= "CMPT",
+	[MLX4_RES_MTT]		= "MTT",
+	[MLX4_RES_MCG]		= "MCG",
+};
+
+u64 mlx4_make_profile(struct mlx4_dev *dev,
+		      struct mlx4_profile *request,
+		      struct mlx4_dev_cap *dev_cap,
+		      struct mlx4_init_hca_param *init_hca)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_resource {
+		u64 size;
+		u64 start;
+		int type;
+		int num;
+		int log_num;
+	};
+
+	u64 total_size = 0;
+	struct mlx4_resource *profile;
+	struct mlx4_resource tmp;
+	int i, j;
+
+	profile = kzalloc(MLX4_RES_NUM * sizeof *profile, GFP_KERNEL);
+	if (!profile)
+		return -ENOMEM;
+
+	profile[MLX4_RES_QP].size     = dev_cap->qpc_entry_sz;
+	profile[MLX4_RES_RDMARC].size = dev_cap->rdmarc_entry_sz;
+	profile[MLX4_RES_ALTC].size   = dev_cap->altc_entry_sz;
+	profile[MLX4_RES_AUXC].size   = dev_cap->aux_entry_sz;
+	profile[MLX4_RES_SRQ].size    = dev_cap->srq_entry_sz;
+	profile[MLX4_RES_CQ].size     = dev_cap->cqc_entry_sz;
+	profile[MLX4_RES_EQ].size     = dev_cap->eqc_entry_sz;
+	profile[MLX4_RES_DMPT].size   = dev_cap->dmpt_entry_sz;
+	profile[MLX4_RES_CMPT].size   = dev_cap->cmpt_entry_sz;
+	profile[MLX4_RES_MTT].size    = MLX4_MTT_ENTRY_PER_SEG * dev_cap->mtt_entry_sz;
+	profile[MLX4_RES_MCG].size    = MLX4_MGM_ENTRY_SIZE;
+
+	profile[MLX4_RES_QP].num      = request->num_qp;
+	profile[MLX4_RES_RDMARC].num  = request->num_qp * request->rdmarc_per_qp;
+	profile[MLX4_RES_ALTC].num    = request->num_qp;
+	profile[MLX4_RES_AUXC].num    = request->num_qp;
+	profile[MLX4_RES_SRQ].num     = request->num_srq;
+	profile[MLX4_RES_CQ].num      = request->num_cq;
+	profile[MLX4_RES_EQ].num      = MLX4_NUM_EQ + dev_cap->reserved_eqs;
+	profile[MLX4_RES_DMPT].num    = request->num_mpt;
+	profile[MLX4_RES_CMPT].num    = MLX4_NUM_CMPTS;
+	profile[MLX4_RES_MTT].num     = request->num_mtt;
+	profile[MLX4_RES_MCG].num     = request->num_mcg;
+
+	for (i = 0; i < MLX4_RES_NUM; ++i) {
+		profile[i].type     = i;
+		profile[i].num      = roundup_pow_of_two(profile[i].num);
+		profile[i].log_num  = ilog2(profile[i].num);
+		profile[i].size    *= profile[i].num;
+		profile[i].size     = max(profile[i].size, (u64) PAGE_SIZE);
+	}
+
+	/*
+	 * Sort the resources in decreasing order of size.  Since they
+	 * all have sizes that are powers of 2, we'll be able to keep
+	 * resources aligned to their size and pack them without gaps
+	 * using the sorted order.
+	 */
+	for (i = MLX4_RES_NUM; i > 0; --i)
+		for (j = 1; j < i; ++j) {
+			if (profile[j].size > profile[j - 1].size) {
+				tmp	       = profile[j];
+				profile[j]     = profile[j - 1];
+				profile[j - 1] = tmp;
+			}
+		}
+
+	for (i = 0; i < MLX4_RES_NUM; ++i) {
+		if (profile[i].size) {
+			profile[i].start = total_size;
+			total_size	+= profile[i].size;
+		}
+
+		if (total_size > dev_cap->max_icm_sz) {
+			mlx4_err(dev, "Profile requires 0x%llx bytes; "
+				  "won't fit in 0x%llx bytes of context memory.\n",
+				  (unsigned long long) total_size,
+				  (unsigned long long) dev_cap->max_icm_sz);
+			kfree(profile);
+			return -ENOMEM;
+		}
+
+		if (profile[i].size)
+			mlx4_dbg(dev, "  profile[%2d] (%6s): 2^%02d entries @ 0x%10llx, "
+				  "size 0x%10llx\n",
+				 i, res_name[profile[i].type], profile[i].log_num,
+				 (unsigned long long) profile[i].start,
+				 (unsigned long long) profile[i].size);
+	}
+
+	mlx4_dbg(dev, "HCA context memory: reserving %d KB\n",
+		 (int) (total_size >> 10));
+
+	for (i = 0; i < MLX4_RES_NUM; ++i) {
+		switch (profile[i].type) {
+		case MLX4_RES_QP:
+			dev->caps.num_qps     = profile[i].num;
+			init_hca->qpc_base    = profile[i].start;
+			init_hca->log_num_qps = profile[i].log_num;
+			break;
+		case MLX4_RES_RDMARC:
+			for (priv->qp_table.rdmarc_shift = 0;
+			     request->num_qp << priv->qp_table.rdmarc_shift < profile[i].num;
+			     ++priv->qp_table.rdmarc_shift)
+				; /* nothing */
+			dev->caps.max_qp_dest_rdma = 1 << priv->qp_table.rdmarc_shift;
+			priv->qp_table.rdmarc_base   = (u32) profile[i].start;
+			init_hca->rdmarc_base	     = profile[i].start;
+			init_hca->log_rd_per_qp	     = priv->qp_table.rdmarc_shift;
+			break;
+		case MLX4_RES_ALTC:
+			init_hca->altc_base = profile[i].start;
+			break;
+		case MLX4_RES_AUXC:
+			init_hca->auxc_base = profile[i].start;
+			break;
+		case MLX4_RES_SRQ:
+			dev->caps.num_srqs     = profile[i].num;
+			init_hca->srqc_base    = profile[i].start;
+			init_hca->log_num_srqs = profile[i].log_num;
+			break;
+		case MLX4_RES_CQ:
+			dev->caps.num_cqs     = profile[i].num;
+			init_hca->cqc_base    = profile[i].start;
+			init_hca->log_num_cqs = profile[i].log_num;
+			break;
+		case MLX4_RES_EQ:
+			dev->caps.num_eqs     = profile[i].num;
+			init_hca->eqc_base    = profile[i].start;
+			init_hca->log_num_eqs = profile[i].log_num;
+			break;
+		case MLX4_RES_DMPT:
+			dev->caps.num_mpts	= profile[i].num;
+			priv->mr_table.mpt_base = profile[i].start;
+			init_hca->dmpt_base	= profile[i].start;
+			init_hca->log_mpt_sz	= profile[i].log_num;
+			break;
+		case MLX4_RES_CMPT:
+			init_hca->cmpt_base	 = profile[i].start;
+			break;
+		case MLX4_RES_MTT:
+			dev->caps.num_mtt_segs	 = profile[i].num;
+			priv->mr_table.mtt_base	 = profile[i].start;
+			init_hca->mtt_base	 = profile[i].start;
+			break;
+		case MLX4_RES_MCG:
+			dev->caps.num_mgms	  = profile[i].num >> 1;
+			dev->caps.num_amgms	  = profile[i].num >> 1;
+			init_hca->mc_base	  = profile[i].start;
+			init_hca->log_mc_entry_sz = ilog2(MLX4_MGM_ENTRY_SIZE);
+			init_hca->log_mc_table_sz = profile[i].log_num;
+			init_hca->log_mc_hash_sz  = profile[i].log_num - 1;
+			break;
+		default:
+			break;
+		}
+	}
+
+	/*
+	 * PDs don't take any HCA memory, but we assign them as part
+	 * of the HCA profile anyway.
+	 */
+	dev->caps.num_pds = MLX4_NUM_PDS;
+
+	kfree(profile);
+	return total_size;
+}

drivers/net/mlx4/qp.c

+/*
+ * Copyright (c) 2004 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005, 2006, 2007 Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+
+#include <linux/mlx4/cmd.h>
+#include <linux/mlx4/qp.h>
+
+#include "mlx4.h"
+#include "icm.h"
+
+void mlx4_qp_event(struct mlx4_dev *dev, u32 qpn, int event_type)
+{
+	struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
+	struct mlx4_qp *qp;
+
+	spin_lock(&qp_table->lock);
+
+	qp = __mlx4_qp_lookup(dev, qpn);
+	if (qp)
+		atomic_inc(&qp->refcount);
+
+	spin_unlock(&qp_table->lock);
+
+	if (!qp) {
+		mlx4_warn(dev, "Async event for bogus QP %08x\n", qpn);
+		return;
+	}
+
+	qp->event(qp, event_type);
+
+	if (atomic_dec_and_test(&qp->refcount))
+		complete(&qp->free);
+}
+
+int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
+		   enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
+		   struct mlx4_qp_context *context, enum mlx4_qp_optpar optpar,
+		   int sqd_event, struct mlx4_qp *qp)
+{
+	static const u16 op[MLX4_QP_NUM_STATE][MLX4_QP_NUM_STATE] = {
+		[MLX4_QP_STATE_RST] = {
+			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
+			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
+			[MLX4_QP_STATE_INIT]	= MLX4_CMD_RST2INIT_QP,
+		},
+		[MLX4_QP_STATE_INIT]  = {
+			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
+			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
+			[MLX4_QP_STATE_INIT]	= MLX4_CMD_INIT2INIT_QP,
+			[MLX4_QP_STATE_RTR]	= MLX4_CMD_INIT2RTR_QP,
+		},
+		[MLX4_QP_STATE_RTR]   = {
+			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
+			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
+			[MLX4_QP_STATE_RTS]	= MLX4_CMD_RTR2RTS_QP,
+		},
+		[MLX4_QP_STATE_RTS]   = {
+			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
+			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
+			[MLX4_QP_STATE_RTS]	= MLX4_CMD_RTS2RTS_QP,
+			[MLX4_QP_STATE_SQD]	= MLX4_CMD_RTS2SQD_QP,
+		},
+		[MLX4_QP_STATE_SQD] = {
+			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
+			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
+			[MLX4_QP_STATE_RTS]	= MLX4_CMD_SQD2RTS_QP,
+			[MLX4_QP_STATE_SQD]	= MLX4_CMD_SQD2SQD_QP,
+		},
+		[MLX4_QP_STATE_SQER] = {
+			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
+			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
+			[MLX4_QP_STATE_RTS]	= MLX4_CMD_SQERR2RTS_QP,
+		},
+		[MLX4_QP_STATE_ERR] = {
+			[MLX4_QP_STATE_RST]	= MLX4_CMD_2RST_QP,
+			[MLX4_QP_STATE_ERR]	= MLX4_CMD_2ERR_QP,
+		}
+	};
+
+	struct mlx4_cmd_mailbox *mailbox;
+	int ret = 0;
+
+	if (cur_state < 0 || cur_state >= MLX4_QP_NUM_STATE ||
+	    new_state < 0 || cur_state >= MLX4_QP_NUM_STATE ||
+	    !op[cur_state][new_state])
+		return -EINVAL;
+
+	if (op[cur_state][new_state] == MLX4_CMD_2RST_QP)
+		return mlx4_cmd(dev, 0, qp->qpn, 2,
+				MLX4_CMD_2RST_QP, MLX4_CMD_TIME_CLASS_A);
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+
+	if (cur_state == MLX4_QP_STATE_RST && new_state == MLX4_QP_STATE_INIT) {
+		u64 mtt_addr = mlx4_mtt_addr(dev, mtt);
+		context->mtt_base_addr_h = mtt_addr >> 32;
+		context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
+		context->log_page_size   = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
+	}
+
+	*(__be32 *) mailbox->buf = cpu_to_be32(optpar);
+	memcpy(mailbox->buf + 8, context, sizeof *context);
+
+	((struct mlx4_qp_context *) (mailbox->buf + 8))->local_qpn =
+		cpu_to_be32(qp->qpn);
+
+	ret = mlx4_cmd(dev, mailbox->dma, qp->qpn | (!!sqd_event << 31),
+		       new_state == MLX4_QP_STATE_RST ? 2 : 0,
+		       op[cur_state][new_state], MLX4_CMD_TIME_CLASS_C);
+
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mlx4_qp_modify);
+
+int mlx4_qp_alloc(struct mlx4_dev *dev, int sqpn, struct mlx4_qp *qp)
+{
+	struct mlx4_priv *priv = mlx4_priv(dev);
+	struct mlx4_qp_table *qp_table = &priv->qp_table;
+	int err;
+
+	if (sqpn)
+		qp->qpn = sqpn;
+	else {
+		qp->qpn = mlx4_bitmap_alloc(&qp_table->bitmap);
+		if (qp->qpn == -1)
+			return -ENOMEM;
+	}
+
+	err = mlx4_table_get(dev, &qp_table->qp_table, qp->qpn);
+	if (err)
+		goto err_out;
+
+	err = mlx4_table_get(dev, &qp_table->auxc_table, qp->qpn);
+	if (err)
+		goto err_put_qp;
+
+	err = mlx4_table_get(dev, &qp_table->altc_table, qp->qpn);
+	if (err)
+		goto err_put_auxc;
+
+	err = mlx4_table_get(dev, &qp_table->rdmarc_table, qp->qpn);
+	if (err)
+		goto err_put_altc;
+
+	err = mlx4_table_get(dev, &qp_table->cmpt_table, qp->qpn);
+	if (err)
+		goto err_put_rdmarc;
+
+	spin_lock_irq(&qp_table->lock);
+	err = radix_tree_insert(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1), qp);
+	spin_unlock_irq(&qp_table->lock);
+	if (err)
+		goto err_put_cmpt;
+
+	atomic_set(&qp->refcount, 1);
+	init_completion(&qp->free);
+
+	return 0;
+
+err_put_cmpt:
+	mlx4_table_put(dev, &qp_table->cmpt_table, qp->qpn);
+
+err_put_rdmarc:
+	mlx4_table_put(dev, &qp_table->rdmarc_table, qp->qpn);
+
+err_put_altc:
+	mlx4_table_put(dev, &qp_table->altc_table, qp->qpn);
+
+err_put_auxc:
+	mlx4_table_put(dev, &qp_table->auxc_table, qp->qpn);
+
+err_put_qp:
+	mlx4_table_put(dev, &qp_table->qp_table, qp->qpn);
+
+err_out:
+	if (!sqpn)
+		mlx4_bitmap_free(&qp_table->bitmap, qp->qpn);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_qp_alloc);
+
+void mlx4_qp_remove(struct mlx4_dev *dev, struct mlx4_qp *qp)
+{
+	struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
+	unsigned long flags;
+
+	spin_lock_irqsave(&qp_table->lock, flags);
+	radix_tree_delete(&dev->qp_table_tree, qp->qpn & (dev->caps.num_qps - 1));
+	spin_unlock_irqrestore(&qp_table->lock, flags);
+}
+EXPORT_SYMBOL_GPL(mlx4_qp_remove);
+
+void mlx4_qp_free(struct mlx4_dev *dev, struct mlx4_qp *qp)
+{
+	struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
+
+	if (atomic_dec_and_test(&qp->refcount))
+		complete(&qp->free);
+	wait_for_completion(&qp->free);
+
+	mlx4_table_put(dev, &qp_table->cmpt_table, qp->qpn);
+	mlx4_table_put(dev, &qp_table->rdmarc_table, qp->qpn);
+	mlx4_table_put(dev, &qp_table->altc_table, qp->qpn);
+	mlx4_table_put(dev, &qp_table->auxc_table, qp->qpn);
+	mlx4_table_put(dev, &qp_table->qp_table, qp->qpn);
+
+	mlx4_bitmap_free(&qp_table->bitmap, qp->qpn);
+}
+EXPORT_SYMBOL_GPL(mlx4_qp_free);
+
+static int mlx4_CONF_SPECIAL_QP(struct mlx4_dev *dev, u32 base_qpn)
+{
+	return mlx4_cmd(dev, 0, base_qpn, 0, MLX4_CMD_CONF_SPECIAL_QP,
+			MLX4_CMD_TIME_CLASS_B);
+}
+
+int __devinit mlx4_init_qp_table(struct mlx4_dev *dev)
+{
+	struct mlx4_qp_table *qp_table = &mlx4_priv(dev)->qp_table;
+	int err;
+
+	spin_lock_init(&qp_table->lock);
+	INIT_RADIX_TREE(&dev->qp_table_tree, GFP_ATOMIC);
+
+	/*
+	 * We reserve 2 extra QPs per port for the special QPs.  The
+	 * block of special QPs must be aligned to a multiple of 8, so
+	 * round up.
+	 */
+	dev->caps.sqp_start = ALIGN(dev->caps.reserved_qps, 8);
+	err = mlx4_bitmap_init(&qp_table->bitmap, dev->caps.num_qps,
+			       (1 << 24) - 1, dev->caps.sqp_start + 8);
+	if (err)
+		return err;
+
+	return mlx4_CONF_SPECIAL_QP(dev, dev->caps.sqp_start);
+}
+
+void mlx4_cleanup_qp_table(struct mlx4_dev *dev)
+{
+	mlx4_CONF_SPECIAL_QP(dev, 0);
+	mlx4_bitmap_cleanup(&mlx4_priv(dev)->qp_table.bitmap);
+}

drivers/net/mlx4/reset.c

+/*
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include "mlx4.h"
+
+int mlx4_reset(struct mlx4_dev *dev)
+{
+	void __iomem *reset;
+	u32 *hca_header = NULL;
+	int pcie_cap;
+	u16 devctl;
+	u16 linkctl;
+	u16 vendor;
+	unsigned long end;
+	u32 sem;
+	int i;
+	int err = 0;
+
+#define MLX4_RESET_BASE		0xf0000
+#define MLX4_RESET_SIZE		  0x400
+#define MLX4_SEM_OFFSET		  0x3fc
+#define MLX4_RESET_OFFSET	   0x10
+#define MLX4_RESET_VALUE	swab32(1)
+
+#define MLX4_SEM_TIMEOUT_JIFFIES	(10 * HZ)
+#define MLX4_RESET_TIMEOUT_JIFFIES	(2 * HZ)
+
+	/*
+	 * Reset the chip.  This is somewhat ugly because we have to
+	 * save off the PCI header before reset and then restore it
+	 * after the chip reboots.  We skip config space offsets 22
+	 * and 23 since those have a special meaning.
+	 */
+
+	/* Do we need to save off the full 4K PCI Express header?? */
+	hca_header = kmalloc(256, GFP_KERNEL);
+	if (!hca_header) {
+		err = -ENOMEM;
+		mlx4_err(dev, "Couldn't allocate memory to save HCA "
+			  "PCI header, aborting.\n");
+		goto out;
+	}
+
+	pcie_cap = pci_find_capability(dev->pdev, PCI_CAP_ID_EXP);
+
+	for (i = 0; i < 64; ++i) {
+		if (i == 22 || i == 23)
+			continue;
+		if (pci_read_config_dword(dev->pdev, i * 4, hca_header + i)) {
+			err = -ENODEV;
+			mlx4_err(dev, "Couldn't save HCA "
+				  "PCI header, aborting.\n");
+			goto out;
+		}
+	}
+
+	reset = ioremap(pci_resource_start(dev->pdev, 0) + MLX4_RESET_BASE,
+			MLX4_RESET_SIZE);
+	if (!reset) {
+		err = -ENOMEM;
+		mlx4_err(dev, "Couldn't map HCA reset register, aborting.\n");
+		goto out;
+	}
+
+	/* grab HW semaphore to lock out flash updates */
+	end = jiffies + MLX4_SEM_TIMEOUT_JIFFIES;
+	do {
+		sem = readl(reset + MLX4_SEM_OFFSET);
+		if (!sem)
+			break;
+
+		msleep(1);
+	} while (time_before(jiffies, end));
+
+	if (sem) {
+		mlx4_err(dev, "Failed to obtain HW semaphore, aborting\n");
+		err = -EAGAIN;
+		iounmap(reset);
+		goto out;
+	}
+
+	/* actually hit reset */
+	writel(MLX4_RESET_VALUE, reset + MLX4_RESET_OFFSET);
+	iounmap(reset);
+
+	end = jiffies + MLX4_RESET_TIMEOUT_JIFFIES;
+	do {
+		if (!pci_read_config_word(dev->pdev, PCI_VENDOR_ID, &vendor) &&
+		    vendor != 0xffff)
+			break;
+
+		msleep(1);
+	} while (time_before(jiffies, end));
+
+	if (vendor == 0xffff) {
+		err = -ENODEV;
+		mlx4_err(dev, "PCI device did not come back after reset, "
+			  "aborting.\n");
+		goto out;
+	}
+
+	/* Now restore the PCI headers */
+	if (pcie_cap) {
+		devctl = hca_header[(pcie_cap + PCI_EXP_DEVCTL) / 4];
+		if (pci_write_config_word(dev->pdev, pcie_cap + PCI_EXP_DEVCTL,
+					   devctl)) {
+			err = -ENODEV;
+			mlx4_err(dev, "Couldn't restore HCA PCI Express "
+				 "Device Control register, aborting.\n");
+			goto out;
+		}
+		linkctl = hca_header[(pcie_cap + PCI_EXP_LNKCTL) / 4];
+		if (pci_write_config_word(dev->pdev, pcie_cap + PCI_EXP_LNKCTL,
+					   linkctl)) {
+			err = -ENODEV;
+			mlx4_err(dev, "Couldn't restore HCA PCI Express "
+				 "Link control register, aborting.\n");
+			goto out;
+		}
+	}
+
+	for (i = 0; i < 16; ++i) {
+		if (i * 4 == PCI_COMMAND)
+			continue;
+
+		if (pci_write_config_dword(dev->pdev, i * 4, hca_header[i])) {
+			err = -ENODEV;
+			mlx4_err(dev, "Couldn't restore HCA reg %x, "
+				  "aborting.\n", i);
+			goto out;
+		}
+	}
+
+	if (pci_write_config_dword(dev->pdev, PCI_COMMAND,
+				   hca_header[PCI_COMMAND / 4])) {
+		err = -ENODEV;
+		mlx4_err(dev, "Couldn't restore HCA COMMAND, "
+			  "aborting.\n");
+		goto out;
+	}
+
+out:
+	kfree(hca_header);
+
+	return err;
+}

drivers/net/mlx4/srq.c

+/*
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/init.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4.h"
+#include "icm.h"
+
+struct mlx4_srq_context {
+	__be32			state_logsize_srqn;
+	u8			logstride;
+	u8			reserved1[3];
+	u8			pg_offset;
+	u8			reserved2[3];
+	u32			reserved3;
+	u8			log_page_size;
+	u8			reserved4[2];
+	u8			mtt_base_addr_h;
+	__be32			mtt_base_addr_l;
+	__be32			pd;
+	__be16			limit_watermark;
+	__be16			wqe_cnt;
+	u16			reserved5;
+	__be16			wqe_counter;
+	u32			reserved6;
+	__be64			db_rec_addr;
+};
+
+void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type)
+{
+	struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
+	struct mlx4_srq *srq;
+
+	spin_lock(&srq_table->lock);
+
+	srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1));
+	if (srq)
+		atomic_inc(&srq->refcount);
+
+	spin_unlock(&srq_table->lock);
+
+	if (!srq) {
+		mlx4_warn(dev, "Async event for bogus SRQ %08x\n", srqn);
+		return;
+	}
+
+	srq->event(srq, event_type);
+
+	if (atomic_dec_and_test(&srq->refcount))
+		complete(&srq->free);
+}
+
+static int mlx4_SW2HW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+			  int srq_num)
+{
+	return mlx4_cmd(dev, mailbox->dma, srq_num, 0, MLX4_CMD_SW2HW_SRQ,
+			MLX4_CMD_TIME_CLASS_A);
+}
+
+static int mlx4_HW2SW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
+			  int srq_num)
+{
+	return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, srq_num,
+			    mailbox ? 0 : 1, MLX4_CMD_HW2SW_SRQ,
+			    MLX4_CMD_TIME_CLASS_A);
+}
+
+static int mlx4_ARM_SRQ(struct mlx4_dev *dev, int srq_num, int limit_watermark)
+{
+	return mlx4_cmd(dev, limit_watermark, srq_num, 0, MLX4_CMD_ARM_SRQ,
+			MLX4_CMD_TIME_CLASS_B);
+}
+
+int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, struct mlx4_mtt *mtt,
+		   u64 db_rec, struct mlx4_srq *srq)
+{
+	struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
+	struct mlx4_cmd_mailbox *mailbox;
+	struct mlx4_srq_context *srq_context;
+	u64 mtt_addr;
+	int err;
+
+	srq->srqn = mlx4_bitmap_alloc(&srq_table->bitmap);
+	if (srq->srqn == -1)
+		return -ENOMEM;
+
+	err = mlx4_table_get(dev, &srq_table->table, srq->srqn);
+	if (err)
+		goto err_out;
+
+	err = mlx4_table_get(dev, &srq_table->cmpt_table, srq->srqn);
+	if (err)
+		goto err_put;
+
+	spin_lock_irq(&srq_table->lock);
+	err = radix_tree_insert(&srq_table->tree, srq->srqn, srq);
+	spin_unlock_irq(&srq_table->lock);
+	if (err)
+		goto err_cmpt_put;
+
+	mailbox = mlx4_alloc_cmd_mailbox(dev);
+	if (IS_ERR(mailbox)) {
+		err = PTR_ERR(mailbox);
+		goto err_radix;
+	}
+
+	srq_context = mailbox->buf;
+	memset(srq_context, 0, sizeof *srq_context);
+
+	srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) |
+						      srq->srqn);
+	srq_context->logstride          = srq->wqe_shift - 4;
+	srq_context->log_page_size      = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
+
+	mtt_addr = mlx4_mtt_addr(dev, mtt);
+	srq_context->mtt_base_addr_h    = mtt_addr >> 32;
+	srq_context->mtt_base_addr_l    = cpu_to_be32(mtt_addr & 0xffffffff);
+	srq_context->pd			= cpu_to_be32(pdn);
+	srq_context->db_rec_addr        = cpu_to_be64(db_rec);
+
+	err = mlx4_SW2HW_SRQ(dev, mailbox, srq->srqn);
+	mlx4_free_cmd_mailbox(dev, mailbox);
+	if (err)
+		goto err_radix;
+
+	atomic_set(&srq->refcount, 1);
+	init_completion(&srq->free);
+
+	return 0;
+
+err_radix:
+	spin_lock_irq(&srq_table->lock);
+	radix_tree_delete(&srq_table->tree, srq->srqn);
+	spin_unlock_irq(&srq_table->lock);
+
+err_cmpt_put:
+	mlx4_table_put(dev, &srq_table->cmpt_table, srq->srqn);
+
+err_put:
+	mlx4_table_put(dev, &srq_table->table, srq->srqn);
+
+err_out:
+	mlx4_bitmap_free(&srq_table->bitmap, srq->srqn);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_srq_alloc);
+
+void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq)
+{
+	struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
+	int err;
+
+	err = mlx4_HW2SW_SRQ(dev, NULL, srq->srqn);
+	if (err)
+		mlx4_warn(dev, "HW2SW_SRQ failed (%d) for SRQN %06x\n", err, srq->srqn);
+
+	spin_lock_irq(&srq_table->lock);
+	radix_tree_delete(&srq_table->tree, srq->srqn);
+	spin_unlock_irq(&srq_table->lock);
+
+	if (atomic_dec_and_test(&srq->refcount))
+		complete(&srq->free);
+	wait_for_completion(&srq->free);
+
+	mlx4_table_put(dev, &srq_table->table, srq->srqn);
+	mlx4_bitmap_free(&srq_table->bitmap, srq->srqn);
+}
+EXPORT_SYMBOL_GPL(mlx4_srq_free);
+
+int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark)
+{
+	return mlx4_ARM_SRQ(dev, srq->srqn, limit_watermark);
+}
+EXPORT_SYMBOL_GPL(mlx4_srq_arm);
+
+int __devinit mlx4_init_srq_table(struct mlx4_dev *dev)
+{
+	struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
+	int err;
+
+	spin_lock_init(&srq_table->lock);
+	INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC);
+
+	err = mlx4_bitmap_init(&srq_table->bitmap, dev->caps.num_srqs,
+			       dev->caps.num_srqs - 1, dev->caps.reserved_srqs);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+void mlx4_cleanup_srq_table(struct mlx4_dev *dev)
+{
+	mlx4_bitmap_cleanup(&mlx4_priv(dev)->srq_table.bitmap);
+}

include/linux/mlx4/cmd.h

+/*
+ * Copyright (c) 2006 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_CMD_H
+#define MLX4_CMD_H
+
+#include <linux/dma-mapping.h>
+
+enum {
+	/* initialization and general commands */
+	MLX4_CMD_SYS_EN		 = 0x1,
+	MLX4_CMD_SYS_DIS	 = 0x2,
+	MLX4_CMD_MAP_FA		 = 0xfff,
+	MLX4_CMD_UNMAP_FA	 = 0xffe,
+	MLX4_CMD_RUN_FW		 = 0xff6,
+	MLX4_CMD_MOD_STAT_CFG	 = 0x34,
+	MLX4_CMD_QUERY_DEV_CAP	 = 0x3,
+	MLX4_CMD_QUERY_FW	 = 0x4,
+	MLX4_CMD_ENABLE_LAM	 = 0xff8,
+	MLX4_CMD_DISABLE_LAM	 = 0xff7,
+	MLX4_CMD_QUERY_DDR	 = 0x5,
+	MLX4_CMD_QUERY_ADAPTER	 = 0x6,
+	MLX4_CMD_INIT_HCA	 = 0x7,
+	MLX4_CMD_CLOSE_HCA	 = 0x8,
+	MLX4_CMD_INIT_PORT	 = 0x9,
+	MLX4_CMD_CLOSE_PORT	 = 0xa,
+	MLX4_CMD_QUERY_HCA	 = 0xb,
+	MLX4_CMD_SET_PORT	 = 0xc,
+	MLX4_CMD_ACCESS_DDR	 = 0x2e,
+	MLX4_CMD_MAP_ICM	 = 0xffa,
+	MLX4_CMD_UNMAP_ICM	 = 0xff9,
+	MLX4_CMD_MAP_ICM_AUX	 = 0xffc,
+	MLX4_CMD_UNMAP_ICM_AUX	 = 0xffb,
+	MLX4_CMD_SET_ICM_SIZE	 = 0xffd,
+
+	/* TPT commands */
+	MLX4_CMD_SW2HW_MPT	 = 0xd,
+	MLX4_CMD_QUERY_MPT	 = 0xe,
+	MLX4_CMD_HW2SW_MPT	 = 0xf,
+	MLX4_CMD_READ_MTT	 = 0x10,
+	MLX4_CMD_WRITE_MTT	 = 0x11,
+	MLX4_CMD_SYNC_TPT	 = 0x2f,
+
+	/* EQ commands */
+	MLX4_CMD_MAP_EQ		 = 0x12,
+	MLX4_CMD_SW2HW_EQ	 = 0x13,
+	MLX4_CMD_HW2SW_EQ	 = 0x14,
+	MLX4_CMD_QUERY_EQ	 = 0x15,
+
+	/* CQ commands */
+	MLX4_CMD_SW2HW_CQ	 = 0x16,
+	MLX4_CMD_HW2SW_CQ	 = 0x17,
+	MLX4_CMD_QUERY_CQ	 = 0x18,
+	MLX4_CMD_RESIZE_CQ	 = 0x2c,
+
+	/* SRQ commands */
+	MLX4_CMD_SW2HW_SRQ	 = 0x35,
+	MLX4_CMD_HW2SW_SRQ	 = 0x36,
+	MLX4_CMD_QUERY_SRQ	 = 0x37,
+	MLX4_CMD_ARM_SRQ	 = 0x40,
+
+	/* QP/EE commands */
+	MLX4_CMD_RST2INIT_QP	 = 0x19,
+	MLX4_CMD_INIT2RTR_QP	 = 0x1a,
+	MLX4_CMD_RTR2RTS_QP	 = 0x1b,
+	MLX4_CMD_RTS2RTS_QP	 = 0x1c,
+	MLX4_CMD_SQERR2RTS_QP	 = 0x1d,
+	MLX4_CMD_2ERR_QP	 = 0x1e,
+	MLX4_CMD_RTS2SQD_QP	 = 0x1f,
+	MLX4_CMD_SQD2SQD_QP	 = 0x38,
+	MLX4_CMD_SQD2RTS_QP	 = 0x20,
+	MLX4_CMD_2RST_QP	 = 0x21,
+	MLX4_CMD_QUERY_QP	 = 0x22,
+	MLX4_CMD_INIT2INIT_QP	 = 0x2d,
+	MLX4_CMD_SUSPEND_QP	 = 0x32,
+	MLX4_CMD_UNSUSPEND_QP	 = 0x33,
+	/* special QP and management commands */
+	MLX4_CMD_CONF_SPECIAL_QP = 0x23,
+	MLX4_CMD_MAD_IFC	 = 0x24,
+
+	/* multicast commands */
+	MLX4_CMD_READ_MCG	 = 0x25,
+	MLX4_CMD_WRITE_MCG	 = 0x26,
+	MLX4_CMD_MGID_HASH	 = 0x27,
+
+	/* miscellaneous commands */
+	MLX4_CMD_DIAG_RPRT	 = 0x30,
+	MLX4_CMD_NOP		 = 0x31,
+
+	/* debug commands */
+	MLX4_CMD_QUERY_DEBUG_MSG = 0x2a,
+	MLX4_CMD_SET_DEBUG_MSG	 = 0x2b,
+};
+
+enum {
+	MLX4_CMD_TIME_CLASS_A	= 10000,
+	MLX4_CMD_TIME_CLASS_B	= 10000,
+	MLX4_CMD_TIME_CLASS_C	= 10000,
+};
+
+enum {
+	MLX4_MAILBOX_SIZE	=  4096
+};
+
+struct mlx4_dev;
+
+struct mlx4_cmd_mailbox {
+	void		       *buf;
+	dma_addr_t		dma;
+};
+
+int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
+	       int out_is_imm, u32 in_modifier, u8 op_modifier,
+	       u16 op, unsigned long timeout);
+
+/* Invoke a command with no output parameter */
+static inline int mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u32 in_modifier,
+			   u8 op_modifier, u16 op, unsigned long timeout)
+{
+	return __mlx4_cmd(dev, in_param, NULL, 0, in_modifier,
+			  op_modifier, op, timeout);
+}
+
+/* Invoke a command with an output mailbox */
+static inline int mlx4_cmd_box(struct mlx4_dev *dev, u64 in_param, u64 out_param,
+			       u32 in_modifier, u8 op_modifier, u16 op,
+			       unsigned long timeout)
+{
+	return __mlx4_cmd(dev, in_param, &out_param, 0, in_modifier,
+			  op_modifier, op, timeout);
+}
+
+/*
+ * Invoke a command with an immediate output parameter (and copy the
+ * output into the caller's out_param pointer after the command
+ * executes).
+ */
+static inline int mlx4_cmd_imm(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
+			       u32 in_modifier, u8 op_modifier, u16 op,
+			       unsigned long timeout)
+{
+	return __mlx4_cmd(dev, in_param, out_param, 1, in_modifier,
+			  op_modifier, op, timeout);
+}
+
+struct mlx4_cmd_mailbox *mlx4_alloc_cmd_mailbox(struct mlx4_dev *dev);
+void mlx4_free_cmd_mailbox(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox);
+
+#endif /* MLX4_CMD_H */

include/linux/mlx4/cq.h

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *	- Redistributions of source code must retain the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer.
+ *
+ *	- Redistributions in binary form must reproduce the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer in the documentation and/or other materials
+ *	  provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_CQ_H
+#define MLX4_CQ_H
+
+#include <linux/types.h>
+
+#include <linux/mlx4/device.h>
+#include <linux/mlx4/doorbell.h>
+
+struct mlx4_cqe {
+	__be32			my_qpn;
+	__be32			immed_rss_invalid;
+	__be32			g_mlpath_rqpn;
+	u8			sl;
+	u8			reserved1;
+	__be16			rlid;
+	u32			reserved2;
+	__be32			byte_cnt;
+	__be16			wqe_index;
+	__be16			checksum;
+	u8			reserved3[3];
+	u8			owner_sr_opcode;
+};
+
+struct mlx4_err_cqe {
+	__be32			my_qpn;
+	u32			reserved1[5];
+	__be16			wqe_index;
+	u8			vendor_err_syndrome;
+	u8			syndrome;
+	u8			reserved2[3];
+	u8			owner_sr_opcode;
+};
+
+enum {
+	MLX4_CQE_OWNER_MASK	= 0x80,
+	MLX4_CQE_IS_SEND_MASK	= 0x40,
+	MLX4_CQE_OPCODE_MASK	= 0x1f
+};
+
+enum {
+	MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR		= 0x01,
+	MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR		= 0x02,
+	MLX4_CQE_SYNDROME_LOCAL_PROT_ERR		= 0x04,
+	MLX4_CQE_SYNDROME_WR_FLUSH_ERR			= 0x05,
+	MLX4_CQE_SYNDROME_MW_BIND_ERR			= 0x06,
+	MLX4_CQE_SYNDROME_BAD_RESP_ERR			= 0x10,
+	MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR		= 0x11,
+	MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR		= 0x12,
+	MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR		= 0x13,
+	MLX4_CQE_SYNDROME_REMOTE_OP_ERR			= 0x14,
+	MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR	= 0x15,
+	MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR		= 0x16,
+	MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR		= 0x22,
+};
+
+static inline void mlx4_cq_arm(struct mlx4_cq *cq, u32 cmd,
+			       void __iomem *uar_page,
+			       spinlock_t *doorbell_lock)
+{
+	__be32 doorbell[2];
+	u32 sn;
+	u32 ci;
+
+	sn = cq->arm_sn & 3;
+	ci = cq->cons_index & 0xffffff;
+
+	*cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);
+
+	/*
+	 * Make sure that the doorbell record in host memory is
+	 * written before ringing the doorbell via PCI MMIO.
+	 */
+	wmb();
+
+	doorbell[0] = cpu_to_be32(sn << 28 | cmd | cq->cqn);
+	doorbell[1] = cpu_to_be32(ci);
+
+	mlx4_write64(doorbell, uar_page + MLX4_CQ_DOORBELL, doorbell_lock);
+}
+
+static inline void mlx4_cq_set_ci(struct mlx4_cq *cq)
+{
+	*cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
+}
+
+enum {
+	MLX4_CQ_DB_REQ_NOT_SOL		= 1 << 24,
+	MLX4_CQ_DB_REQ_NOT		= 2 << 24
+};
+
+#endif /* MLX4_CQ_H */

include/linux/mlx4/device.h

+/*
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *	- Redistributions of source code must retain the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer.
+ *
+ *	- Redistributions in binary form must reproduce the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer in the documentation and/or other materials
+ *	  provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_DEVICE_H
+#define MLX4_DEVICE_H
+
+#include <linux/pci.h>
+#include <linux/completion.h>
+#include <linux/radix-tree.h>
+
+#include <asm/atomic.h>
+
+enum {
+	MLX4_FLAG_MSI_X		= 1 << 0,
+};
+
+enum {
+	MLX4_MAX_PORTS		= 2
+};
+
+enum {
+	MLX4_DEV_CAP_FLAG_RC		= 1 <<  0,
+	MLX4_DEV_CAP_FLAG_UC		= 1 <<  1,
+	MLX4_DEV_CAP_FLAG_UD		= 1 <<  2,
+	MLX4_DEV_CAP_FLAG_SRQ		= 1 <<  6,
+	MLX4_DEV_CAP_FLAG_IPOIB_CSUM	= 1 <<  7,
+	MLX4_DEV_CAP_FLAG_BAD_PKEY_CNTR	= 1 <<  8,
+	MLX4_DEV_CAP_FLAG_BAD_QKEY_CNTR	= 1 <<  9,
+	MLX4_DEV_CAP_FLAG_MEM_WINDOW	= 1 << 16,
+	MLX4_DEV_CAP_FLAG_APM		= 1 << 17,
+	MLX4_DEV_CAP_FLAG_ATOMIC	= 1 << 18,
+	MLX4_DEV_CAP_FLAG_RAW_MCAST	= 1 << 19,
+	MLX4_DEV_CAP_FLAG_UD_AV_PORT	= 1 << 20,
+	MLX4_DEV_CAP_FLAG_UD_MCAST	= 1 << 21
+};
+
+enum mlx4_event {
+	MLX4_EVENT_TYPE_COMP		   = 0x00,
+	MLX4_EVENT_TYPE_PATH_MIG	   = 0x01,
+	MLX4_EVENT_TYPE_COMM_EST	   = 0x02,
+	MLX4_EVENT_TYPE_SQ_DRAINED	   = 0x03,
+	MLX4_EVENT_TYPE_SRQ_QP_LAST_WQE	   = 0x13,
+	MLX4_EVENT_TYPE_SRQ_LIMIT	   = 0x14,
+	MLX4_EVENT_TYPE_CQ_ERROR	   = 0x04,
+	MLX4_EVENT_TYPE_WQ_CATAS_ERROR	   = 0x05,
+	MLX4_EVENT_TYPE_EEC_CATAS_ERROR	   = 0x06,
+	MLX4_EVENT_TYPE_PATH_MIG_FAILED	   = 0x07,
+	MLX4_EVENT_TYPE_WQ_INVAL_REQ_ERROR = 0x10,
+	MLX4_EVENT_TYPE_WQ_ACCESS_ERROR	   = 0x11,
+	MLX4_EVENT_TYPE_SRQ_CATAS_ERROR	   = 0x12,
+	MLX4_EVENT_TYPE_LOCAL_CATAS_ERROR  = 0x08,
+	MLX4_EVENT_TYPE_PORT_CHANGE	   = 0x09,
+	MLX4_EVENT_TYPE_EQ_OVERFLOW	   = 0x0f,
+	MLX4_EVENT_TYPE_ECC_DETECT	   = 0x0e,
+	MLX4_EVENT_TYPE_CMD		   = 0x0a
+};
+
+enum {
+	MLX4_PORT_CHANGE_SUBTYPE_DOWN	= 1,
+	MLX4_PORT_CHANGE_SUBTYPE_ACTIVE	= 4
+};
+
+enum {
+	MLX4_PERM_LOCAL_READ	= 1 << 10,
+	MLX4_PERM_LOCAL_WRITE	= 1 << 11,
+	MLX4_PERM_REMOTE_READ	= 1 << 12,
+	MLX4_PERM_REMOTE_WRITE	= 1 << 13,
+	MLX4_PERM_ATOMIC	= 1 << 14
+};
+
+enum {
+	MLX4_OPCODE_NOP			= 0x00,
+	MLX4_OPCODE_SEND_INVAL		= 0x01,
+	MLX4_OPCODE_RDMA_WRITE		= 0x08,
+	MLX4_OPCODE_RDMA_WRITE_IMM	= 0x09,
+	MLX4_OPCODE_SEND		= 0x0a,
+	MLX4_OPCODE_SEND_IMM		= 0x0b,
+	MLX4_OPCODE_LSO			= 0x0e,
+	MLX4_OPCODE_RDMA_READ		= 0x10,
+	MLX4_OPCODE_ATOMIC_CS		= 0x11,
+	MLX4_OPCODE_ATOMIC_FA		= 0x12,
+	MLX4_OPCODE_ATOMIC_MASK_CS	= 0x14,
+	MLX4_OPCODE_ATOMIC_MASK_FA	= 0x15,
+	MLX4_OPCODE_BIND_MW		= 0x18,
+	MLX4_OPCODE_FMR			= 0x19,
+	MLX4_OPCODE_LOCAL_INVAL		= 0x1b,
+	MLX4_OPCODE_CONFIG_CMD		= 0x1f,
+
+	MLX4_RECV_OPCODE_RDMA_WRITE_IMM	= 0x00,
+	MLX4_RECV_OPCODE_SEND		= 0x01,
+	MLX4_RECV_OPCODE_SEND_IMM	= 0x02,
+	MLX4_RECV_OPCODE_SEND_INVAL	= 0x03,
+
+	MLX4_CQE_OPCODE_ERROR		= 0x1e,
+	MLX4_CQE_OPCODE_RESIZE		= 0x16,
+};
+
+enum {
+	MLX4_STAT_RATE_OFFSET	= 5
+};
+
+struct mlx4_caps {
+	u64			fw_ver;
+	int			num_ports;
+	int			vl_cap;
+	int			mtu_cap;
+	int			gid_table_len;
+	int			pkey_table_len;
+	int			local_ca_ack_delay;
+	int			num_uars;
+	int			bf_reg_size;
+	int			bf_regs_per_page;
+	int			max_sq_sg;
+	int			max_rq_sg;
+	int			num_qps;
+	int			max_wqes;
+	int			max_sq_desc_sz;
+	int			max_rq_desc_sz;
+	int			max_qp_init_rdma;
+	int			max_qp_dest_rdma;
+	int			reserved_qps;
+	int			sqp_start;
+	int			num_srqs;
+	int			max_srq_wqes;
+	int			max_srq_sge;
+	int			reserved_srqs;
+	int			num_cqs;
+	int			max_cqes;
+	int			reserved_cqs;
+	int			num_eqs;
+	int			reserved_eqs;
+	int			num_mpts;
+	int			num_mtt_segs;
+	int			fmr_reserved_mtts;
+	int			reserved_mtts;
+	int			reserved_mrws;
+	int			reserved_uars;
+	int			num_mgms;
+	int			num_amgms;
+	int			reserved_mcgs;
+	int			num_qp_per_mgm;
+	int			num_pds;
+	int			reserved_pds;
+	int			mtt_entry_sz;
+	u32			page_size_cap;
+	u32			flags;
+	u16			stat_rate_support;
+	u8			port_width_cap;
+};
+
+struct mlx4_buf_list {
+	void		       *buf;
+	dma_addr_t		map;
+};
+
+struct mlx4_buf {
+	union {
+		struct mlx4_buf_list	direct;
+		struct mlx4_buf_list   *page_list;
+	} u;
+	int			nbufs;
+	int			npages;
+	int			page_shift;
+};
+
+struct mlx4_mtt {
+	u32			first_seg;
+	int			order;
+	int			page_shift;
+};
+
+struct mlx4_mr {
+	struct mlx4_mtt		mtt;
+	u64			iova;
+	u64			size;
+	u32			key;
+	u32			pd;
+	u32			access;
+	int			enabled;
+};
+
+struct mlx4_uar {
+	unsigned long		pfn;
+	int			index;
+};
+
+struct mlx4_cq {
+	void (*comp)		(struct mlx4_cq *);
+	void (*event)		(struct mlx4_cq *, enum mlx4_event);
+
+	struct mlx4_uar	       *uar;
+
+	u32			cons_index;
+
+	__be32		       *set_ci_db;
+	__be32		       *arm_db;
+	int			arm_sn;
+
+	int			cqn;
+
+	atomic_t		refcount;
+	struct completion	free;
+};
+
+struct mlx4_qp {
+	void (*event)		(struct mlx4_qp *, enum mlx4_event);
+
+	int			qpn;
+
+	atomic_t		refcount;
+	struct completion	free;
+};
+
+struct mlx4_srq {
+	void (*event)		(struct mlx4_srq *, enum mlx4_event);
+
+	int			srqn;
+	int			max;
+	int			max_gs;
+	int			wqe_shift;
+
+	atomic_t		refcount;
+	struct completion	free;
+};
+
+struct mlx4_av {
+	__be32			port_pd;
+	u8			reserved1;
+	u8			g_slid;
+	__be16			dlid;
+	u8			reserved2;
+	u8			gid_index;
+	u8			stat_rate;
+	u8			hop_limit;
+	__be32			sl_tclass_flowlabel;
+	u8			dgid[16];
+};
+
+struct mlx4_dev {
+	struct pci_dev	       *pdev;
+	unsigned long		flags;
+	struct mlx4_caps	caps;
+	struct radix_tree_root	qp_table_tree;
+};
+
+struct mlx4_init_port_param {
+	int			set_guid0;
+	int			set_node_guid;
+	int			set_si_guid;
+	u16			mtu;
+	int			port_width_cap;
+	u16			vl_cap;
+	u16			max_gid;
+	u16			max_pkey;
+	u64			guid0;
+	u64			node_guid;
+	u64			si_guid;
+};
+
+int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct,
+		   struct mlx4_buf *buf);
+void mlx4_buf_free(struct mlx4_dev *dev, int size, struct mlx4_buf *buf);
+
+int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn);
+void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn);
+
+int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar);
+void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar);
+
+int mlx4_mtt_init(struct mlx4_dev *dev, int npages, int page_shift,
+		  struct mlx4_mtt *mtt);
+void mlx4_mtt_cleanup(struct mlx4_dev *dev, struct mlx4_mtt *mtt);
+u64 mlx4_mtt_addr(struct mlx4_dev *dev, struct mlx4_mtt *mtt);
+
+int mlx4_mr_alloc(struct mlx4_dev *dev, u32 pd, u64 iova, u64 size, u32 access,
+		  int npages, int page_shift, struct mlx4_mr *mr);
+void mlx4_mr_free(struct mlx4_dev *dev, struct mlx4_mr *mr);
+int mlx4_mr_enable(struct mlx4_dev *dev, struct mlx4_mr *mr);
+int mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
+		   int start_index, int npages, u64 *page_list);
+int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
+		       struct mlx4_buf *buf);
+
+int mlx4_cq_alloc(struct mlx4_dev *dev, int nent, struct mlx4_mtt *mtt,
+		  struct mlx4_uar *uar, u64 db_rec, struct mlx4_cq *cq);
+void mlx4_cq_free(struct mlx4_dev *dev, struct mlx4_cq *cq);
+
+int mlx4_qp_alloc(struct mlx4_dev *dev, int sqpn, struct mlx4_qp *qp);
+void mlx4_qp_free(struct mlx4_dev *dev, struct mlx4_qp *qp);
+
+int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, struct mlx4_mtt *mtt,
+		   u64 db_rec, struct mlx4_srq *srq);
+void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq);
+int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark);
+
+int mlx4_INIT_PORT(struct mlx4_dev *dev, struct mlx4_init_port_param *param, int port);
+int mlx4_CLOSE_PORT(struct mlx4_dev *dev, int port);
+
+int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16]);
+int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16]);
+
+#endif /* MLX4_DEVICE_H */

include/linux/mlx4/doorbell.h

+/*
+ * Copyright (c) 2004 Topspin Communications.  All rights reserved.
+ * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_DOORBELL_H
+#define MLX4_DOORBELL_H
+
+#include <linux/types.h>
+#include <linux/io.h>
+
+#define MLX4_SEND_DOORBELL    0x14
+#define MLX4_CQ_DOORBELL      0x20
+
+#if BITS_PER_LONG == 64
+/*
+ * Assume that we can just write a 64-bit doorbell atomically.  s390
+ * actually doesn't have writeq() but S/390 systems don't even have
+ * PCI so we won't worry about it.
+ */
+
+#define MLX4_DECLARE_DOORBELL_LOCK(name)
+#define MLX4_INIT_DOORBELL_LOCK(ptr)    do { } while (0)
+#define MLX4_GET_DOORBELL_LOCK(ptr)      (NULL)
+
+static inline void mlx4_write64_raw(__be64 val, void __iomem *dest)
+{
+	__raw_writeq((__force u64) val, dest);
+}
+
+static inline void mlx4_write64(__be32 val[2], void __iomem *dest,
+				spinlock_t *doorbell_lock)
+{
+	__raw_writeq(*(u64 *) val, dest);
+}
+
+#else
+
+/*
+ * Just fall back to a spinlock to protect the doorbell if
+ * BITS_PER_LONG is 32 -- there's no portable way to do atomic 64-bit
+ * MMIO writes.
+ */
+
+#define MLX4_DECLARE_DOORBELL_LOCK(name) spinlock_t name;
+#define MLX4_INIT_DOORBELL_LOCK(ptr)     spin_lock_init(ptr)
+#define MLX4_GET_DOORBELL_LOCK(ptr)      (ptr)
+
+static inline void mlx4_write64_raw(__be64 val, void __iomem *dest)
+{
+	__raw_writel(((__force u32 *) &val)[0], dest);
+	__raw_writel(((__force u32 *) &val)[1], dest + 4);
+}
+
+static inline void mlx4_write64(__be32 val[2], void __iomem *dest,
+				spinlock_t *doorbell_lock)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(doorbell_lock, flags);
+	__raw_writel((__force u32) val[0], dest);
+	__raw_writel((__force u32) val[1], dest + 4);
+	spin_unlock_irqrestore(doorbell_lock, flags);
+}
+
+#endif
+
+#endif /* MLX4_DOORBELL_H */

include/linux/mlx4/driver.h

+/*
+ * Copyright (c) 2006 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_DRIVER_H
+#define MLX4_DRIVER_H
+
+#include <linux/device.h>
+
+struct mlx4_dev;
+
+enum mlx4_dev_event {
+	MLX4_DEV_EVENT_CATASTROPHIC_ERROR,
+	MLX4_DEV_EVENT_PORT_UP,
+	MLX4_DEV_EVENT_PORT_DOWN,
+	MLX4_DEV_EVENT_PORT_REINIT,
+};
+
+struct mlx4_interface {
+	void *			(*add)	 (struct mlx4_dev *dev);
+	void			(*remove)(struct mlx4_dev *dev, void *context);
+	void			(*event) (struct mlx4_dev *dev, void *context,
+					  enum mlx4_dev_event event, int subtype,
+					  int port);
+	struct list_head	list;
+};
+
+int mlx4_register_interface(struct mlx4_interface *intf);
+void mlx4_unregister_interface(struct mlx4_interface *intf);
+
+#endif /* MLX4_DRIVER_H */

include/linux/mlx4/qp.h

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *	- Redistributions of source code must retain the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer.
+ *
+ *	- Redistributions in binary form must reproduce the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer in the documentation and/or other materials
+ *	  provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_QP_H
+#define MLX4_QP_H
+
+#include <linux/types.h>
+
+#include <linux/mlx4/device.h>
+
+#define MLX4_INVALID_LKEY	0x100
+
+enum mlx4_qp_optpar {
+	MLX4_QP_OPTPAR_ALT_ADDR_PATH		= 1 << 0,
+	MLX4_QP_OPTPAR_RRE			= 1 << 1,
+	MLX4_QP_OPTPAR_RAE			= 1 << 2,
+	MLX4_QP_OPTPAR_RWE			= 1 << 3,
+	MLX4_QP_OPTPAR_PKEY_INDEX		= 1 << 4,
+	MLX4_QP_OPTPAR_Q_KEY			= 1 << 5,
+	MLX4_QP_OPTPAR_RNR_TIMEOUT		= 1 << 6,
+	MLX4_QP_OPTPAR_PRIMARY_ADDR_PATH	= 1 << 7,
+	MLX4_QP_OPTPAR_SRA_MAX			= 1 << 8,
+	MLX4_QP_OPTPAR_RRA_MAX			= 1 << 9,
+	MLX4_QP_OPTPAR_PM_STATE			= 1 << 10,
+	MLX4_QP_OPTPAR_RETRY_COUNT		= 1 << 12,
+	MLX4_QP_OPTPAR_RNR_RETRY		= 1 << 13,
+	MLX4_QP_OPTPAR_ACK_TIMEOUT		= 1 << 14,
+	MLX4_QP_OPTPAR_SCHED_QUEUE		= 1 << 16
+};
+
+enum mlx4_qp_state {
+	MLX4_QP_STATE_RST			= 0,
+	MLX4_QP_STATE_INIT			= 1,
+	MLX4_QP_STATE_RTR			= 2,
+	MLX4_QP_STATE_RTS			= 3,
+	MLX4_QP_STATE_SQER			= 4,
+	MLX4_QP_STATE_SQD			= 5,
+	MLX4_QP_STATE_ERR			= 6,
+	MLX4_QP_STATE_SQ_DRAINING		= 7,
+	MLX4_QP_NUM_STATE
+};
+
+enum {
+	MLX4_QP_ST_RC				= 0x0,
+	MLX4_QP_ST_UC				= 0x1,
+	MLX4_QP_ST_RD				= 0x2,
+	MLX4_QP_ST_UD				= 0x3,
+	MLX4_QP_ST_MLX				= 0x7
+};
+
+enum {
+	MLX4_QP_PM_MIGRATED			= 0x3,
+	MLX4_QP_PM_ARMED			= 0x0,
+	MLX4_QP_PM_REARM			= 0x1
+};
+
+enum {
+	/* params1 */
+	MLX4_QP_BIT_SRE				= 1 << 15,
+	MLX4_QP_BIT_SWE				= 1 << 14,
+	MLX4_QP_BIT_SAE				= 1 << 13,
+	/* params2 */
+	MLX4_QP_BIT_RRE				= 1 << 15,
+	MLX4_QP_BIT_RWE				= 1 << 14,
+	MLX4_QP_BIT_RAE				= 1 << 13,
+	MLX4_QP_BIT_RIC				= 1 <<	4,
+};
+
+struct mlx4_qp_path {
+	u8			fl;
+	u8			reserved1[2];
+	u8			pkey_index;
+	u8			reserved2;
+	u8			grh_mylmc;
+	__be16			rlid;
+	u8			ackto;
+	u8			mgid_index;
+	u8			static_rate;
+	u8			hop_limit;
+	__be32			tclass_flowlabel;
+	u8			rgid[16];
+	u8			sched_queue;
+	u8			snooper_flags;
+	u8			reserved3[2];
+	u8			counter_index;
+	u8			reserved4[7];
+};
+
+struct mlx4_qp_context {
+	__be32			flags;
+	__be32			pd;
+	u8			mtu_msgmax;
+	u8			rq_size_stride;
+	u8			sq_size_stride;
+	u8			rlkey;
+	__be32			usr_page;
+	__be32			local_qpn;
+	__be32			remote_qpn;
+	struct			mlx4_qp_path pri_path;
+	struct			mlx4_qp_path alt_path;
+	__be32			params1;
+	u32			reserved1;
+	__be32			next_send_psn;
+	__be32			cqn_send;
+	u32			reserved2[2];
+	__be32			last_acked_psn;
+	__be32			ssn;
+	__be32			params2;
+	__be32			rnr_nextrecvpsn;
+	__be32			srcd;
+	__be32			cqn_recv;
+	__be64			db_rec_addr;
+	__be32			qkey;
+	__be32			srqn;
+	__be32			msn;
+	__be16			rq_wqe_counter;
+	__be16			sq_wqe_counter;
+	u32			reserved3[2];
+	__be32			param3;
+	__be32			nummmcpeers_basemkey;
+	u8			log_page_size;
+	u8			reserved4[2];
+	u8			mtt_base_addr_h;
+	__be32			mtt_base_addr_l;
+	u32			reserved5[10];
+};
+
+enum {
+	MLX4_WQE_CTRL_FENCE	= 1 << 6,
+	MLX4_WQE_CTRL_CQ_UPDATE	= 3 << 2,
+	MLX4_WQE_CTRL_SOLICITED	= 1 << 1,
+};
+
+struct mlx4_wqe_ctrl_seg {
+	__be32			owner_opcode;
+	u8			reserved2[3];
+	u8			fence_size;
+	/*
+	 * High 24 bits are SRC remote buffer; low 8 bits are flags:
+	 * [7]   SO (strong ordering)
+	 * [5]   TCP/UDP checksum
+	 * [4]   IP checksum
+	 * [3:2] C (generate completion queue entry)
+	 * [1]   SE (solicited event)
+	 */
+	__be32			srcrb_flags;
+	/*
+	 * imm is immediate data for send/RDMA write w/ immediate;
+	 * also invalidation key for send with invalidate; input
+	 * modifier for WQEs on CCQs.
+	 */
+	__be32			imm;
+};
+
+enum {
+	MLX4_WQE_MLX_VL15	= 1 << 17,
+	MLX4_WQE_MLX_SLR	= 1 << 16
+};
+
+struct mlx4_wqe_mlx_seg {
+	u8			owner;
+	u8			reserved1[2];
+	u8			opcode;
+	u8			reserved2[3];
+	u8			size;
+	/*
+	 * [17]    VL15
+	 * [16]    SLR
+	 * [15:12] static rate
+	 * [11:8]  SL
+	 * [4]     ICRC
+	 * [3:2]   C
+	 * [0]     FL (force loopback)
+	 */
+	__be32			flags;
+	__be16			rlid;
+	u16			reserved3;
+};
+
+struct mlx4_wqe_datagram_seg {
+	__be32			av[8];
+	__be32			dqpn;
+	__be32			qkey;
+	__be32			reservd[2];
+};
+
+struct mlx4_wqe_bind_seg {
+	__be32			flags1;
+	__be32			flags2;
+	__be32			new_rkey;
+	__be32			lkey;
+	__be64			addr;
+	__be64			length;
+};
+
+struct mlx4_wqe_fmr_seg {
+	__be32			flags;
+	__be32			mem_key;
+	__be64			buf_list;
+	__be64			start_addr;
+	__be64			reg_len;
+	__be32			offset;
+	__be32			page_size;
+	u32			reserved[2];
+};
+
+struct mlx4_wqe_fmr_ext_seg {
+	u8			flags;
+	u8			reserved;
+	__be16			app_mask;
+	__be16			wire_app_tag;
+	__be16			mem_app_tag;
+	__be32			wire_ref_tag_base;
+	__be32			mem_ref_tag_base;
+};
+
+struct mlx4_wqe_local_inval_seg {
+	u8			flags;
+	u8			reserved1[3];
+	__be32			mem_key;
+	u8			reserved2[3];
+	u8			guest_id;
+	__be64			pa;
+};
+
+struct mlx4_wqe_raddr_seg {
+	__be64			raddr;
+	__be32			rkey;
+	u32			reserved;
+};
+
+struct mlx4_wqe_atomic_seg {
+	__be64			swap_add;
+	__be64			compare;
+};
+
+struct mlx4_wqe_data_seg {
+	__be32			byte_count;
+	__be32			lkey;
+	__be64			addr;
+};
+
+struct mlx4_wqe_inline_seg {
+	__be32			byte_count;
+};
+
+int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
+		   enum mlx4_qp_state cur_state, enum mlx4_qp_state new_state,
+		   struct mlx4_qp_context *context, enum mlx4_qp_optpar optpar,
+		   int sqd_event, struct mlx4_qp *qp);
+
+static inline struct mlx4_qp *__mlx4_qp_lookup(struct mlx4_dev *dev, u32 qpn)
+{
+	return radix_tree_lookup(&dev->qp_table_tree, qpn & (dev->caps.num_qps - 1));
+}
+
+void mlx4_qp_remove(struct mlx4_dev *dev, struct mlx4_qp *qp);
+
+#endif /* MLX4_QP_H */

include/linux/mlx4/srq.h

+/*
+ * Copyright (c) 2007 Cisco Systems, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *	- Redistributions of source code must retain the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer.
+ *
+ *	- Redistributions in binary form must reproduce the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer in the documentation and/or other materials
+ *	  provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef MLX4_SRQ_H
+#define MLX4_SRQ_H
+
+struct mlx4_wqe_srq_next_seg {
+	u16			reserved1;
+	__be16			next_wqe_index;
+	u32			reserved2[3];
+};
+
+#endif /* MLX4_SRQ_H */

include/rdma/ib_umem.h

+/*
+ * Copyright (c) 2007 Cisco Systems.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef IB_UMEM_H
+#define IB_UMEM_H
+
+#include <linux/list.h>
+#include <linux/scatterlist.h>
+
+struct ib_ucontext;
+
+struct ib_umem {
+	struct ib_ucontext     *context;
+	size_t			length;
+	int			offset;
+	int			page_size;
+	int                     writable;
+	struct list_head	chunk_list;
+	struct work_struct	work;
+	struct mm_struct       *mm;
+	unsigned long		diff;
+};
+
+struct ib_umem_chunk {
+	struct list_head	list;
+	int                     nents;
+	int                     nmap;
+	struct scatterlist      page_list[0];
+};
+
+#ifdef CONFIG_INFINIBAND_USER_MEM
+
+struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
+			    size_t size, int access);
+void ib_umem_release(struct ib_umem *umem);
+int ib_umem_page_count(struct ib_umem *umem);
+
+#else /* CONFIG_INFINIBAND_USER_MEM */
+
+#include <linux/err.h>
+
+static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context,
+					  unsigned long addr, size_t size,
+					  int access) {
+	return ERR_PTR(-EINVAL);
+}
+static inline void ib_umem_release(struct ib_umem *umem) { }
+static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; }
+
+#endif /* CONFIG_INFINIBAND_USER_MEM */
+
+#endif /* IB_UMEM_H */

include/rdma/ib_verbs.h

@@ -5,7 +5,7 @@
  * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
  * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
- * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
+ * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
  *
  * This software is available to you under a choice of one of two
  * licenses.  You may choose to be licensed under the terms of the GNU
@@ -710,6 +710,7 @@ struct ib_ucontext {
 	struct list_head	qp_list;
 	struct list_head	srq_list;
 	struct list_head	ah_list;
+	int			closing;
 };
 
 struct ib_uobject {
@@ -723,23 +724,6 @@ struct ib_uobject {
 	int			live;
 };
 
-struct ib_umem {
-	unsigned long		user_base;
-	unsigned long		virt_base;
-	size_t			length;
-	int			offset;
-	int			page_size;
-	int                     writable;
-	struct list_head	chunk_list;
-};
-
-struct ib_umem_chunk {
-	struct list_head	list;
-	int                     nents;
-	int                     nmap;
-	struct scatterlist      page_list[0];
-};
-
 struct ib_udata {
 	void __user *inbuf;
 	void __user *outbuf;
@@ -752,11 +736,6 @@ struct ib_udata {
 	 ((void *) &((struct ib_umem_chunk *) 0)->page_list[1] -	\
 	  (void *) &((struct ib_umem_chunk *) 0)->page_list[0]))
 
-struct ib_umem_object {
-	struct ib_uobject	uobject;
-	struct ib_umem		umem;
-};
-
 struct ib_pd {
 	struct ib_device       *device;
 	struct ib_uobject      *uobject;
@@ -1003,7 +982,8 @@ struct ib_device {
 						  int mr_access_flags,
 						  u64 *iova_start);
 	struct ib_mr *             (*reg_user_mr)(struct ib_pd *pd,
-						  struct ib_umem *region,
+						  u64 start, u64 length,
+						  u64 virt_addr,
 						  int mr_access_flags,
 						  struct ib_udata *udata);
 	int                        (*query_mr)(struct ib_mr *mr,