Merge branch 'etnaviv/next' of https://git.pengutronix.de/git/lst/linux into drm-next

From: Lucas Stach <l.stach@pengutronix.de>
"not much to de-stage this time. Changes from Philipp and Souptick to
use memset32 more and switch the fault handler to the new vm_fault_t
and two small fixes for issues that can be hit in rare corner cases
from me."
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1533563808.2809.7.camel@pengutronix.de

drivers/gpu/drm/etnaviv/etnaviv_drv.h

@@ -18,6 +18,7 @@
 #include <linux/time64.h>
 #include <linux/types.h>
 #include <linux/sizes.h>
+#include <linux/mm_types.h>
 
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
@@ -53,7 +54,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
 		struct drm_file *file);
 
 int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma);
-int etnaviv_gem_fault(struct vm_fault *vmf);
+vm_fault_t etnaviv_gem_fault(struct vm_fault *vmf);
 int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset);
 struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj);
 void *etnaviv_gem_prime_vmap(struct drm_gem_object *obj);

drivers/gpu/drm/etnaviv/etnaviv_gem.c

@@ -169,31 +169,30 @@ int etnaviv_gem_mmap(struct file *filp, struct vm_area_struct *vma)
 	return obj->ops->mmap(obj, vma);
 }
 
-int etnaviv_gem_fault(struct vm_fault *vmf)
+vm_fault_t etnaviv_gem_fault(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
 	struct drm_gem_object *obj = vma->vm_private_data;
 	struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
 	struct page **pages, *page;
 	pgoff_t pgoff;
-	int ret;
+	int err;
 
 	/*
 	 * Make sure we don't parallel update on a fault, nor move or remove
-	 * something from beneath our feet.  Note that vm_insert_page() is
+	 * something from beneath our feet.  Note that vmf_insert_page() is
 	 * specifically coded to take care of this, so we don't have to.
 	 */
-	ret = mutex_lock_interruptible(&etnaviv_obj->lock);
-	if (ret)
-		goto out;
-
+	err = mutex_lock_interruptible(&etnaviv_obj->lock);
+	if (err)
+		return VM_FAULT_NOPAGE;
 	/* make sure we have pages attached now */
 	pages = etnaviv_gem_get_pages(etnaviv_obj);
 	mutex_unlock(&etnaviv_obj->lock);
 
 	if (IS_ERR(pages)) {
-		ret = PTR_ERR(pages);
-		goto out;
+		err = PTR_ERR(pages);
+		return vmf_error(err);
 	}
 
 	/* We don't use vmf->pgoff since that has the fake offset: */
@@ -204,25 +203,7 @@ int etnaviv_gem_fault(struct vm_fault *vmf)
 	VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address,
 	     page_to_pfn(page), page_to_pfn(page) << PAGE_SHIFT);
 
-	ret = vm_insert_page(vma, vmf->address, page);
-
-out:
-	switch (ret) {
-	case -EAGAIN:
-	case 0:
-	case -ERESTARTSYS:
-	case -EINTR:
-	case -EBUSY:
-		/*
-		 * EBUSY is ok: this just means that another thread
-		 * already did the job.
-		 */
-		return VM_FAULT_NOPAGE;
-	case -ENOMEM:
-		return VM_FAULT_OOM;
-	default:
-		return VM_FAULT_SIGBUS;
-	}
+	return vmf_insert_page(vma, vmf->address, page);
 }
 
 int etnaviv_gem_mmap_offset(struct drm_gem_object *obj, u64 *offset)

drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c

@@ -388,9 +388,9 @@ static void submit_cleanup(struct kref *kref)
 		dma_fence_put(submit->in_fence);
 	if (submit->out_fence) {
 		/* first remove from IDR, so fence can not be found anymore */
-		mutex_lock(&submit->gpu->fence_idr_lock);
+		mutex_lock(&submit->gpu->fence_lock);
 		idr_remove(&submit->gpu->fence_idr, submit->out_fence_id);
-		mutex_unlock(&submit->gpu->fence_idr_lock);
+		mutex_unlock(&submit->gpu->fence_lock);
 		dma_fence_put(submit->out_fence);
 	}
 	kfree(submit->pmrs);

drivers/gpu/drm/etnaviv/etnaviv_gpu.c

@@ -799,6 +799,7 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
 
 free_buffer:
 	etnaviv_cmdbuf_free(&gpu->buffer);
+	gpu->buffer.suballoc = NULL;
 destroy_iommu:
 	etnaviv_iommu_destroy(gpu->mmu);
 	gpu->mmu = NULL;
@@ -1726,7 +1727,7 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
 
 	gpu->dev = &pdev->dev;
 	mutex_init(&gpu->lock);
-	mutex_init(&gpu->fence_idr_lock);
+	mutex_init(&gpu->fence_lock);
 
 	/* Map registers: */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

drivers/gpu/drm/etnaviv/etnaviv_gpu.h

@@ -118,7 +118,7 @@ struct etnaviv_gpu {
 	u32 idle_mask;
 
 	/* Fencing support */
-	struct mutex fence_idr_lock;
+	struct mutex fence_lock;
 	struct idr fence_idr;
 	u32 next_fence;
 	u32 active_fence;

drivers/gpu/drm/etnaviv/etnaviv_iommu_v2.c

@@ -119,8 +119,7 @@ static size_t etnaviv_iommuv2_unmap(struct etnaviv_iommu_domain *domain,
 
 static int etnaviv_iommuv2_init(struct etnaviv_iommuv2_domain *etnaviv_domain)
 {
-	u32 *p;
-	int ret, i;
+	int ret;
 
 	/* allocate scratch page */
 	etnaviv_domain->base.bad_page_cpu =
@@ -131,9 +130,9 @@ static int etnaviv_iommuv2_init(struct etnaviv_iommuv2_domain *etnaviv_domain)
 		ret = -ENOMEM;
 		goto fail_mem;
 	}
-	p = etnaviv_domain->base.bad_page_cpu;
-	for (i = 0; i < SZ_4K / 4; i++)
-		*p++ = 0xdead55aa;
+
+	memset32(etnaviv_domain->base.bad_page_cpu, 0xdead55aa,
+		 SZ_4K / sizeof(u32));
 
 	etnaviv_domain->pta_cpu = dma_alloc_wc(etnaviv_domain->base.dev,
 					       SZ_4K, &etnaviv_domain->pta_dma,

drivers/gpu/drm/etnaviv/etnaviv_sched.c

@@ -140,28 +140,38 @@ static const struct drm_sched_backend_ops etnaviv_sched_ops = {
 int etnaviv_sched_push_job(struct drm_sched_entity *sched_entity,
 			   struct etnaviv_gem_submit *submit)
 {
-	int ret;
+	int ret = 0;
+
+	/*
+	 * Hold the fence lock across the whole operation to avoid jobs being
+	 * pushed out of order with regard to their sched fence seqnos as
+	 * allocated in drm_sched_job_init.
+	 */
+	mutex_lock(&submit->gpu->fence_lock);
 
 	ret = drm_sched_job_init(&submit->sched_job, sched_entity,
 				 submit->cmdbuf.ctx);
 	if (ret)
-		return ret;
+		goto out_unlock;
 
 	submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
-	mutex_lock(&submit->gpu->fence_idr_lock);
 	submit->out_fence_id = idr_alloc_cyclic(&submit->gpu->fence_idr,
 						submit->out_fence, 0,
 						INT_MAX, GFP_KERNEL);
-	mutex_unlock(&submit->gpu->fence_idr_lock);
-	if (submit->out_fence_id < 0)
-		return -ENOMEM;
+	if (submit->out_fence_id < 0) {
+		ret = -ENOMEM;
+		goto out_unlock;
+	}
 
 	/* the scheduler holds on to the job now */
 	kref_get(&submit->refcount);
 
 	drm_sched_entity_push_job(&submit->sched_job, sched_entity);
 
-	return 0;
+out_unlock:
+	mutex_unlock(&submit->gpu->fence_lock);
+
+	return ret;
 }
 
 int etnaviv_sched_init(struct etnaviv_gpu *gpu)