[PATCH 11/15] dma-buf: wait for map to complete for static attachments

[Christian König]

We have previously done that in the individual drivers but it is
more defensive to move that into the common code.

Dynamic attachments should wait for map operations to complete by themselves.

Signed-off-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/dma-buf/dma-buf.c                   | 18 +++++++++++++++---
 drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 14 +-------------
 drivers/gpu/drm/nouveau/nouveau_prime.c     | 17 +----------------
 drivers/gpu/drm/radeon/radeon_prime.c       | 16 +++-------------
 4 files changed, 20 insertions(+), 45 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 1cddb65eafda..79795857be3e 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -661,12 +661,24 @@ static struct sg_table * __map_dma_buf(struct dma_buf_attachment *attach,
 				       enum dma_data_direction direction)
 {
 	struct sg_table *sg_table;
+	signed long ret;
 
 	sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction);
+	if (IS_ERR_OR_NULL(sg_table))
+		return sg_table;
+
+	if (!dma_buf_attachment_is_dynamic(attach)) {
+		ret = dma_resv_wait_timeout(attach->dmabuf->resv,
+					    DMA_RESV_USAGE_KERNEL, true,
+					    MAX_SCHEDULE_TIMEOUT);
+		if (ret < 0) {
+			attach->dmabuf->ops->unmap_dma_buf(attach, sg_table,
+							   direction);
+			return ERR_PTR(ret);
+		}
+	}
 
-	if (!IS_ERR_OR_NULL(sg_table))
-		mangle_sg_table(sg_table);
-
+	mangle_sg_table(sg_table);
 	return sg_table;
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
index 579adfafe4d0..782cbca37538 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
@@ -102,21 +102,9 @@ static int amdgpu_dma_buf_pin(struct dma_buf_attachment *attach)
 {
 	struct drm_gem_object *obj = attach->dmabuf->priv;
 	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
-	int r;
 
 	/* pin buffer into GTT */
-	r = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT);
-	if (r)
-		return r;
-
-	if (bo->tbo.moving) {
-		r = dma_fence_wait(bo->tbo.moving, true);
-		if (r) {
-			amdgpu_bo_unpin(bo);
-			return r;
-		}
-	}
-	return 0;
+	return amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT);
 }
 
 /**
diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c b/drivers/gpu/drm/nouveau/nouveau_prime.c
index 60019d0532fc..347488685f74 100644
--- a/drivers/gpu/drm/nouveau/nouveau_prime.c
+++ b/drivers/gpu/drm/nouveau/nouveau_prime.c
@@ -93,22 +93,7 @@ int nouveau_gem_prime_pin(struct drm_gem_object *obj)
 	if (ret)
 		return -EINVAL;
 
-	ret = ttm_bo_reserve(&nvbo->bo, false, false, NULL);
-	if (ret)
-		goto error;
-
-	if (nvbo->bo.moving)
-		ret = dma_fence_wait(nvbo->bo.moving, true);
-
-	ttm_bo_unreserve(&nvbo->bo);
-	if (ret)
-		goto error;
-
-	return ret;
-
-error:
-	nouveau_bo_unpin(nvbo);
-	return ret;
+	return 0;
 }
 
 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c
index 4a90807351e7..42a87948e28c 100644
--- a/drivers/gpu/drm/radeon/radeon_prime.c
+++ b/drivers/gpu/drm/radeon/radeon_prime.c
@@ -77,19 +77,9 @@ int radeon_gem_prime_pin(struct drm_gem_object *obj)
 
 	/* pin buffer into GTT */
 	ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
-	if (unlikely(ret))
-		goto error;
-
-	if (bo->tbo.moving) {
-		ret = dma_fence_wait(bo->tbo.moving, false);
-		if (unlikely(ret)) {
-			radeon_bo_unpin(bo);
-			goto error;
-		}
-	}
-
-	bo->prime_shared_count++;
-error:
+	if (likely(ret == 0))
+		bo->prime_shared_count++;
+
 	radeon_bo_unreserve(bo);
 	return ret;
 }
-- 
2.25.1