drm/nouveau/mmu/nv04: implement vmm on top of new base

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvif/class.h

@@ -14,7 +14,8 @@
 #define NVIF_CLASS_SW_NV50                           /* if0005.h */ -0x00000006
 #define NVIF_CLASS_SW_GF100                          /* if0005.h */ -0x00000007
 
-#define NVIF_CLASS_VMM                               /* if000c.h */  0x0000000c
+#define NVIF_CLASS_VMM                               /* if000c.h */  0x8000000c
+#define NVIF_CLASS_VMM_NV04                          /* if000d.h */  0x8000000d
 
 /* the below match nvidia-assigned (either in hw, or sw) class numbers */
 #define NV_NULL_CLASS                                                0x00000030

drivers/gpu/drm/nouveau/include/nvif/if000d.h

+#ifndef __NVIF_IF000D_H__
+#define __NVIF_IF000D_H__
+#include "if000c.h"
+
+struct nv04_vmm_vn {
+	/* nvif_vmm_vX ... */
+};
+#endif

drivers/gpu/drm/nouveau/nvkm/engine/dma/usernv04.c

@@ -26,7 +26,7 @@
 
 #include <core/gpuobj.h>
 #include <subdev/fb.h>
-#include <subdev/mmu/nv04.h>
+#include <subdev/mmu/vmm.h>
 
 #include <nvif/class.h>
 
@@ -49,7 +49,8 @@ nv04_dmaobj_bind(struct nvkm_dmaobj *base, struct nvkm_gpuobj *parent,
 	int ret;
 
 	if (dmaobj->clone) {
-		struct nvkm_memory *pgt = device->mmu->vmm->pgt[0].mem[0];
+		struct nvkm_memory *pgt =
+			device->mmu->vmm->pd->pt[0]->memory;
 		if (!dmaobj->base.start)
 			return nvkm_gpuobj_wrap(pgt, pgpuobj);
 		nvkm_kmap(pgt);

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/Kbuild

@@ -13,3 +13,4 @@ nvkm-y += nvkm/subdev/mmu/gp100.o
 nvkm-y += nvkm/subdev/mmu/gp10b.o
 
 nvkm-y += nvkm/subdev/mmu/vmm.o
+nvkm-y += nvkm/subdev/mmu/vmmnv04.o

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv04.c

@@ -22,8 +22,9 @@
  * Authors: Ben Skeggs
  */
 #include "nv04.h"
+#include "vmm.h"
 
-#include <core/gpuobj.h>
+#include <nvif/class.h>
 
 #define NV04_PDMA_SIZE (128 * 1024 * 1024)
 #define NV04_PDMA_PAGE (  4 * 1024)
@@ -73,30 +74,10 @@ nv04_vm_flush(struct nvkm_vm *vm)
  ******************************************************************************/
 
 static int
-nv04_mmu_oneinit(struct nvkm_mmu *base)
+nv04_mmu_oneinit(struct nvkm_mmu *mmu)
 {
-	struct nv04_mmu *mmu = nv04_mmu(base);
-	struct nvkm_device *device = mmu->base.subdev.device;
-	struct nvkm_memory *dma;
-	int ret;
-
-	ret = nvkm_vm_create(&mmu->base, 0, NV04_PDMA_SIZE, 0, 4096, NULL,
-			     &mmu->base.vmm);
-	if (ret)
-		return ret;
-
-	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST,
-			      (NV04_PDMA_SIZE / NV04_PDMA_PAGE) * 4 + 8,
-			      16, true, &dma);
-	mmu->base.vmm->pgt[0].mem[0] = dma;
-	mmu->base.vmm->pgt[0].refcount[0] = 1;
-	if (ret)
-		return ret;
-
-	nvkm_kmap(dma);
-	nvkm_wo32(dma, 0x00000, 0x0002103d); /* PCI, RW, PT, !LN */
-	nvkm_wo32(dma, 0x00004, NV04_PDMA_SIZE - 1);
-	nvkm_done(dma);
+	mmu->vmm->pgt[0].mem[0] = mmu->vmm->pd->pt[0]->memory;
+	mmu->vmm->pgt[0].refcount[0] = 1;
 	return 0;
 }
 
@@ -129,7 +110,6 @@ nv04_mmu_new_(const struct nvkm_mmu_func *func, struct nvkm_device *device,
 const struct nvkm_mmu_func
 nv04_mmu = {
 	.oneinit = nv04_mmu_oneinit,
-	.dtor = nv04_mmu_dtor,
 	.limit = NV04_PDMA_SIZE,
 	.dma_bits = 32,
 	.pgt_bits = 32 - 12,
@@ -138,10 +118,11 @@ nv04_mmu = {
 	.map_sg = nv04_vm_map_sg,
 	.unmap = nv04_vm_unmap,
 	.flush = nv04_vm_flush,
+	.vmm = {{ -1, -1, NVIF_CLASS_VMM_NV04}, nv04_vmm_new, true },
 };
 
 int
 nv04_mmu_new(struct nvkm_device *device, int index, struct nvkm_mmu **pmmu)
 {
-	return nv04_mmu_new_(&nv04_mmu, device, index, pmmu);
+	return nvkm_mmu_new_(&nv04_mmu, device, index, pmmu);
 }

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/priv.h

@@ -34,7 +34,7 @@ struct nvkm_mmu_func {
 	void (*flush)(struct nvkm_vm *);
 
 	struct {
-		struct nvkm_sclass base;
+		struct nvkm_sclass user;
 		int (*ctor)(struct nvkm_mmu *, u64 addr, u64 size,
 			    void *argv, u32 argc, struct lock_class_key *,
 			    const char *name, struct nvkm_vmm **);
@@ -45,6 +45,8 @@ struct nvkm_mmu_func {
 int nvkm_vm_create(struct nvkm_mmu *, u64, u64, u64, u32,
 		   struct lock_class_key *, struct nvkm_vm **);
 
+extern const struct nvkm_mmu_func nv04_mmu;
+
 int nv50_vm_create(struct nvkm_mmu *, u64, u64, u64, struct lock_class_key *,
 		   struct nvkm_vm **);
 void nv50_vm_map_pgt(struct nvkm_gpuobj *, u32, struct nvkm_memory **);

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.h

@@ -102,10 +102,9 @@ int nvkm_vmm_ctor(const struct nvkm_vmm_func *, struct nvkm_mmu *,
 		  const char *name, struct nvkm_vmm *);
 void nvkm_vmm_dtor(struct nvkm_vmm *);
 
-struct nvkm_vmm_user {
-	struct nvkm_sclass base;
-	int (*ctor)(struct nvkm_mmu *, u64 addr, u64 size, void *args, u32 argc,
-		    struct lock_class_key *, const char *name,
-		    struct nvkm_vmm **);
-};
+int nv04_vmm_new_(const struct nvkm_vmm_func *, struct nvkm_mmu *, u32,
+		  u64, u64, void *, u32, struct lock_class_key *,
+		  const char *, struct nvkm_vmm **);
+int nv04_vmm_new(struct nvkm_mmu *, u64, u64, void *, u32,
+		 struct lock_class_key *, const char *, struct nvkm_vmm **);
 #endif

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv04.c

+/*
+ * Copyright 2017 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 "vmm.h"
+
+#include <nvif/if000d.h>
+#include <nvif/unpack.h>
+
+static const struct nvkm_vmm_desc_func
+nv04_vmm_desc_pgt = {
+};
+
+static const struct nvkm_vmm_desc
+nv04_vmm_desc_12[] = {
+	{ PGT, 15, 4, 0x1000, &nv04_vmm_desc_pgt },
+	{}
+};
+
+static const struct nvkm_vmm_func
+nv04_vmm = {
+	.page = {
+		{ 12, &nv04_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
+		{}
+	}
+};
+
+int
+nv04_vmm_new_(const struct nvkm_vmm_func *func, struct nvkm_mmu *mmu,
+	      u32 pd_header, u64 addr, u64 size, void *argv, u32 argc,
+	      struct lock_class_key *key, const char *name,
+	      struct nvkm_vmm **pvmm)
+{
+	union {
+		struct nv04_vmm_vn vn;
+	} *args = argv;
+	int ret;
+
+	ret = nvkm_vmm_new_(func, mmu, pd_header, addr, size, key, name, pvmm);
+	if (ret)
+		return ret;
+
+	return nvif_unvers(-ENOSYS, &argv, &argc, args->vn);
+}
+
+int
+nv04_vmm_new(struct nvkm_mmu *mmu, u64 addr, u64 size, void *argv, u32 argc,
+	     struct lock_class_key *key, const char *name,
+	     struct nvkm_vmm **pvmm)
+{
+	struct nvkm_vmm *vmm;
+	struct nvkm_memory *mem;
+	int ret;
+
+	ret = nv04_vmm_new_(&nv04_vmm, mmu, 8, addr, size,
+			    argv, argc, key, name, &vmm);
+	*pvmm = vmm;
+	if (ret)
+		return ret;
+
+	mem = vmm->pd->pt[0]->memory;
+	nvkm_kmap(mem);
+	nvkm_wo32(mem, 0x00000, 0x0002103d); /* PCI, RW, PT, !LN */
+	nvkm_wo32(mem, 0x00004, vmm->limit - 1);
+	nvkm_done(mem);
+	return 0;
+}