Merge drm/drm-next into drm-misc-next

Backmerging drm-next into drm-misc-next for nouveau and panel updates.
Resolves a conflict between ttm and nouveau, where struct ttm_mem_res got
renamed to struct ttm_resource.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

drivers/gpu/drm/ttm/ttm_agp_backend.c

@@ -82,17 +82,18 @@ static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_resource *bo_mem)
 	return ret;
 }
 
-static int ttm_agp_unbind(struct ttm_tt *ttm)
+static void ttm_agp_unbind(struct ttm_tt *ttm)
 {
 	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
 
 	if (agp_be->mem) {
-		if (agp_be->mem->is_bound)
-			return agp_unbind_memory(agp_be->mem);
+		if (agp_be->mem->is_bound) {
+			agp_unbind_memory(agp_be->mem);
+			return;
+		}
 		agp_free_memory(agp_be->mem);
 		agp_be->mem = NULL;
 	}
-	return 0;
 }
 
 static void ttm_agp_destroy(struct ttm_tt *ttm)

drivers/gpu/drm/ttm/ttm_bo.c

@@ -643,7 +643,7 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo,
 		ttm_bo_wait(bo, false, false);
 
 		ttm_bo_cleanup_memtype_use(bo);
-		return 0;
+		return ttm_tt_create(bo, false);
 	}
 
 	evict_mem = bo->mem;
@@ -844,8 +844,10 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
 	if (!fence)
 		return 0;
 
-	if (no_wait_gpu)
+	if (no_wait_gpu) {
+		dma_fence_put(fence);
 		return -EBUSY;
+	}
 
 	dma_resv_add_shared_fence(bo->base.resv, fence);
 
@@ -1152,8 +1154,13 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
 	/*
 	 * Remove the backing store if no placement is given.
 	 */
-	if (!placement->num_placement && !placement->num_busy_placement)
-		return ttm_bo_pipeline_gutting(bo);
+	if (!placement->num_placement && !placement->num_busy_placement) {
+		ret = ttm_bo_pipeline_gutting(bo);
+		if (ret)
+			return ret;
+
+		return ttm_tt_create(bo, false);
+	}
 
 	/*
 	 * Check whether we need to move buffer.
@@ -1170,6 +1177,14 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
 		ttm_flag_masked(&bo->mem.placement, new_flags,
 				~TTM_PL_MASK_MEMTYPE);
 	}
+	/*
+	 * We might need to add a TTM.
+	 */
+	if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
+		ret = ttm_tt_create(bo, true);
+		if (ret)
+			return ret;
+	}
 	return 0;
 }
 EXPORT_SYMBOL(ttm_bo_validate);
@@ -1673,7 +1688,7 @@ out:
 }
 EXPORT_SYMBOL(ttm_bo_swapout);
 
-void ttm_bo_swapout_all(struct ttm_bo_device *bdev)
+void ttm_bo_swapout_all(void)
 {
 	struct ttm_operation_ctx ctx = {
 		.interruptible = false,

drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -531,15 +531,12 @@ static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
 		.interruptible = false,
 		.no_wait_gpu = false
 	};
-	struct ttm_tt *ttm;
+	struct ttm_tt *ttm = bo->ttm;
 	pgprot_t prot;
 	int ret;
 
-	ret = ttm_tt_create(bo, true);
-	if (ret)
-		return ret;
+	BUG_ON(!ttm);
 
-	ttm = bo->ttm;
 	ret = ttm_tt_populate(ttm, &ctx);
 	if (ret)
 		return ret;

drivers/gpu/drm/ttm/ttm_bo_vm.c

@@ -300,8 +300,10 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
 			break;
 		case -EBUSY:
 		case -ERESTARTSYS:
+			dma_fence_put(moving);
 			return VM_FAULT_NOPAGE;
 		default:
+			dma_fence_put(moving);
 			return VM_FAULT_SIGBUS;
 		}
 
@@ -347,11 +349,6 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
 
 		};
 
-		if (ttm_tt_create(bo, true)) {
-			ret = VM_FAULT_OOM;
-			goto out_io_unlock;
-		}
-
 		ttm = bo->ttm;
 		if (ttm_tt_populate(bo->ttm, &ctx)) {
 			ret = VM_FAULT_OOM;
@@ -506,8 +503,10 @@ static int ttm_bo_vm_access_kmap(struct ttm_buffer_object *bo,
 int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr,
 		     void *buf, int len, int write)
 {
-	unsigned long offset = (addr) - vma->vm_start;
 	struct ttm_buffer_object *bo = vma->vm_private_data;
+	unsigned long offset = (addr) - vma->vm_start +
+		((vma->vm_pgoff - drm_vma_node_start(&bo->base.vma_node))
+		 << PAGE_SHIFT);
 	int ret;
 
 	if (len < 1 || (offset + len) >> PAGE_SHIFT > bo->num_pages)

drivers/gpu/drm/ttm/ttm_tt.c

@@ -50,9 +50,6 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc)
 
 	dma_resv_assert_held(bo->base.resv);
 
-	if (bo->ttm)
-		return 0;
-
 	if (bdev->need_dma32)
 		page_flags |= TTM_PAGE_FLAG_DMA32;
 
@@ -70,6 +67,7 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc)
 		page_flags |= TTM_PAGE_FLAG_SG;
 		break;
 	default:
+		bo->ttm = NULL;
 		pr_err("Illegal buffer object type\n");
 		return -EINVAL;
 	}
@@ -244,7 +242,6 @@ int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
 	ttm_tt_init_fields(ttm, bo, page_flags);
 
 	if (ttm_tt_alloc_page_directory(ttm)) {
-		ttm_tt_destroy(ttm);
 		pr_err("Failed allocating page table\n");
 		return -ENOMEM;
 	}
@@ -268,7 +265,6 @@ int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object *bo,
 
 	INIT_LIST_HEAD(&ttm_dma->pages_list);
 	if (ttm_dma_tt_alloc_page_directory(ttm_dma)) {
-		ttm_tt_destroy(ttm);
 		pr_err("Failed allocating page table\n");
 		return -ENOMEM;
 	}
@@ -290,7 +286,6 @@ int ttm_sg_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object *bo,
 	else
 		ret = ttm_dma_tt_alloc_page_directory(ttm_dma);
 	if (ret) {
-		ttm_tt_destroy(ttm);
 		pr_err("Failed allocating page table\n");
 		return -ENOMEM;
 	}
@@ -313,11 +308,8 @@ EXPORT_SYMBOL(ttm_dma_tt_fini);
 
 void ttm_tt_unbind(struct ttm_tt *ttm)
 {
-	int ret;
-
 	if (ttm->state == tt_bound) {
-		ret = ttm->func->unbind(ttm);
-		BUG_ON(ret);
+		ttm->func->unbind(ttm);
 		ttm->state = tt_unbound;
 	}
 }