dma-buf: add more reservation object locking wrappers

Complete the abstraction of the ww_mutex inside the reservation object.

This allows us to add more handling and debugging to the reservation
object in the future.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/320761/

4 files changed, 9 insertions, 8 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index e069de8b54e6..cce0575119b0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1729,7 +1729,7 @@ int amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
 	*map = mapping;
 
 	/* Double check that the BO is reserved by this CS */
-	if (READ_ONCE((*bo)->tbo.resv->lock.ctx) != &parser->ticket)
+	if (reservation_object_locking_ctx((*bo)->tbo.resv) != &parser->ticket)
 		return -EINVAL;
 
 	if (!((*bo)->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)) {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
index 02cd845e77b3..344f277b54f0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
@@ -380,7 +380,7 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
 	bp.flags = 0;
 	bp.type = ttm_bo_type_sg;
 	bp.resv = resv;
-	ww_mutex_lock(&resv->lock, NULL);
+	reservation_object_lock(resv, NULL);
 	ret = amdgpu_bo_create(adev, &bp, &bo);
 	if (ret)
 		goto error;
@@ -392,11 +392,11 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
 	if (attach->dmabuf->ops != &amdgpu_dmabuf_ops)
 		bo->prime_shared_count = 1;
 
-	ww_mutex_unlock(&resv->lock);
+	reservation_object_unlock(resv);
 	return &bo->gem_base;
 
 error:
-	ww_mutex_unlock(&resv->lock);
+	reservation_object_unlock(resv);
 	return ERR_PTR(ret);
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 19ec775b7aa8..e352aa2cc28b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -546,7 +546,7 @@ static int amdgpu_bo_do_create(struct amdgpu_device *adev,
 
 fail_unreserve:
 	if (!bp->resv)
-		ww_mutex_unlock(&bo->tbo.resv->lock);
+		reservation_object_unlock(bo->tbo.resv);
 	amdgpu_bo_unref(&bo);
 	return r;
 }
@@ -1089,7 +1089,7 @@ int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
  */
 void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
 {
-	lockdep_assert_held(&bo->tbo.resv->lock.base);
+	reservation_object_assert_held(bo->tbo.resv);
 
 	if (tiling_flags)
 		*tiling_flags = bo->tiling_flags;
@@ -1330,7 +1330,7 @@ int amdgpu_bo_sync_wait(struct amdgpu_bo *bo, void *owner, bool intr)
 u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
 {
 	WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_SYSTEM);
-	WARN_ON_ONCE(!ww_mutex_is_locked(&bo->tbo.resv->lock) &&
+	WARN_ON_ONCE(!reservation_object_is_locked(bo->tbo.resv) &&
 		     !bo->pin_count && bo->tbo.type != ttm_bo_type_kernel);
 	WARN_ON_ONCE(bo->tbo.mem.start == AMDGPU_BO_INVALID_OFFSET);
 	WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_VRAM &&
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 24c3c05e2fb7..f72d3625e162 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2416,7 +2416,8 @@ void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket)
 			struct amdgpu_bo *bo;
 
 			bo = mapping->bo_va->base.bo;
-			if (READ_ONCE(bo->tbo.resv->lock.ctx) != ticket)
+			if (reservation_object_locking_ctx(bo->tbo.resv) !=
+			    ticket)
 				continue;
 		}