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

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Am 25.03.20 um 18:27 schrieb Alex Deucher:
On Wed, Mar 25, 2020 at 1:20 PM Christian König
<christian.koenig@xxxxxxx> wrote:
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>

Is it already in drm-misc and just hasn't made it into
amd-staging-drm-next yet?  I can try and rebase next week if so.

Ah! Yeah there it is:

commit 5e791166d377c539db0f889e7793204912c374da
Author: Christian König <ckoenig.leichtzumerken@xxxxxxxxx>
Date:   Fri Jan 10 16:09:54 2020 +0100

    drm/ttm: nuke invalidate_caches callback

    Another completely unused feature.

    Signed-off-by: Christian König <christian.koenig@xxxxxxx>
    Reviewed-by: Huang Rui <ray.huang@xxxxxxx>
    Link: https://patchwork.freedesktop.org/patch/348265/

Looks like we haven't merged that into amd-staging-drm-next yet.

Christian.


Alex


---
   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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