Re: [PATCH] drm/ttm: clean up the inteface which is not used

Christian König <christian.koenig@xxxxxxx> · Wed, 25 Mar 2020 18:20:37 +0100

Am 25.03.20 um 16:34 schrieb Huang Rui:
invalidate_caches is actually not used, so clean it up.

Signed-off-by: Huang Rui <ray.huang@xxxxxxx>

Already had the same patch around for a while, looks like I've just 
forgot to commit it.

Reviewed-by: Christian König <christian.koenig@xxxxxxx>

---
  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c    |  6 ------
  drivers/gpu/drm/nouveau/nouveau_bo.c       |  7 -------
  drivers/gpu/drm/qxl/qxl_ttm.c              |  6 ------
  drivers/gpu/drm/radeon/radeon_ttm.c        |  6 ------
  drivers/gpu/drm/ttm/ttm_bo.c               |  8 +-------
  drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c |  6 ------
  include/drm/ttm/ttm_bo_driver.h            | 13 -------------
  7 files changed, 1 insertion(+), 51 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index cd2bde6..b397148 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -62,11 +62,6 @@
  
  #define AMDGPU_TTM_VRAM_MAX_DW_READ	(size_t)128
  
-static int amdgpu_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
-{
-	return 0;
-}
-
  /**
   * amdgpu_init_mem_type - Initialize a memory manager for a specific type of
   * memory request.
@@ -1746,7 +1741,6 @@ static struct ttm_bo_driver amdgpu_bo_driver = {
  	.ttm_tt_create = &amdgpu_ttm_tt_create,
  	.ttm_tt_populate = &amdgpu_ttm_tt_populate,
  	.ttm_tt_unpopulate = &amdgpu_ttm_tt_unpopulate,
-	.invalidate_caches = &amdgpu_invalidate_caches,
  	.init_mem_type = &amdgpu_init_mem_type,
  	.eviction_valuable = amdgpu_ttm_bo_eviction_valuable,
  	.evict_flags = &amdgpu_evict_flags,
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 1b62ccc..7dd94e6 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -647,13 +647,6 @@ nouveau_ttm_tt_create(struct ttm_buffer_object *bo, uint32_t page_flags)
  }
  
  static int
-nouveau_bo_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
-{
-	/* We'll do this from user space. */
-	return 0;
-}
-
-static int
  nouveau_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
  			 struct ttm_mem_type_manager *man)
  {
diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index 16a5e90..62a5e42 100644
--- a/drivers/gpu/drm/qxl/qxl_ttm.c
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -48,11 +48,6 @@ static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
  	return qdev;
  }
  
-static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
-{
-	return 0;
-}
-
  static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
  			     struct ttm_mem_type_manager *man)
  {
@@ -256,7 +251,6 @@ static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
  
  static struct ttm_bo_driver qxl_bo_driver = {
  	.ttm_tt_create = &qxl_ttm_tt_create,
-	.invalidate_caches = &qxl_invalidate_caches,
  	.init_mem_type = &qxl_init_mem_type,
  	.eviction_valuable = ttm_bo_eviction_valuable,
  	.evict_flags = &qxl_evict_flags,
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index f4af6703..40282bf 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -66,11 +66,6 @@ static struct radeon_device *radeon_get_rdev(struct ttm_bo_device *bdev)
  	return rdev;
  }
  
-static int radeon_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
-{
-	return 0;
-}
-
  static int radeon_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
  				struct ttm_mem_type_manager *man)
  {
@@ -774,7 +769,6 @@ static struct ttm_bo_driver radeon_bo_driver = {
  	.ttm_tt_create = &radeon_ttm_tt_create,
  	.ttm_tt_populate = &radeon_ttm_tt_populate,
  	.ttm_tt_unpopulate = &radeon_ttm_tt_unpopulate,
-	.invalidate_caches = &radeon_invalidate_caches,
  	.init_mem_type = &radeon_init_mem_type,
  	.eviction_valuable = ttm_bo_eviction_valuable,
  	.evict_flags = &radeon_evict_flags,
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 2445e2b..fd09bbb 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -343,14 +343,8 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
  	}
  
  moved:
-	if (bo->evicted) {
-		if (bdev->driver->invalidate_caches) {
-			ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
-			if (ret)
-				pr_err("Can not flush read caches\n");
-		}
+	if (bo->evicted)
  		bo->evicted = false;
-	}
  
  	if (bo->mem.mm_node)
  		bo->offset = (bo->mem.start << PAGE_SHIFT) +
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
index d8ea3dd..3f3b2c7 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
@@ -736,11 +736,6 @@ static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
  	return NULL;
  }
  
-static int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
-{
-	return 0;
-}
-
  static int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
  		      struct ttm_mem_type_manager *man)
  {
@@ -866,7 +861,6 @@ struct ttm_bo_driver vmw_bo_driver = {
  	.ttm_tt_create = &vmw_ttm_tt_create,
  	.ttm_tt_populate = &vmw_ttm_populate,
  	.ttm_tt_unpopulate = &vmw_ttm_unpopulate,
-	.invalidate_caches = vmw_invalidate_caches,
  	.init_mem_type = vmw_init_mem_type,
  	.eviction_valuable = ttm_bo_eviction_valuable,
  	.evict_flags = vmw_evict_flags,
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index cac7a8a..5f60c1e 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -256,19 +256,6 @@ struct ttm_bo_driver {
  	 */
  	void (*ttm_tt_unpopulate)(struct ttm_tt *ttm);
  
-	/**
-	 * struct ttm_bo_driver member invalidate_caches
-	 *
-	 * @bdev: the buffer object device.
-	 * @flags: new placement of the rebound buffer object.
-	 *
-	 * A previosly evicted buffer has been rebound in a
-	 * potentially new location. Tell the driver that it might
-	 * consider invalidating read (texture) caches on the next command
-	 * submission as a consequence.
-	 */
-
-	int (*invalidate_caches)(struct ttm_bo_device *bdev, uint32_t flags);
  	int (*init_mem_type)(struct ttm_bo_device *bdev, uint32_t type,
  			     struct ttm_mem_type_manager *man);
  

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