diff options
| author | Matthew Auld <matthew.auld@intel.com> | 2023-02-08 14:53:16 +0000 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2023-02-23 10:29:00 +0100 |
| commit | c604d31950d10db45267bbcb9ce8f1dbc2bfa74e (patch) | |
| tree | 39a1ededd9f44c537d03bf8310f1267df34a050f /drivers/gpu | |
| parent | 4d5a2cce47a8e1e7119a881a4714f0eee557c1cd (diff) | |
drm/gem-vram: handle NULL bo->resource in move callback
The ttm BO now initially has NULL bo->resource, and leaves the driver
the handle that. However it looks like we forgot to handle that for
ttm_bo_move_memcpy() users, like with vram-gem, since it just silently
returns zero. This seems to then trigger warnings like:
WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/drm_gem_vram_helper.c:255 drm_gem_vram_offset (??:?)
Fix this by calling move_null() if the new resource is TTM_PL_SYSTEM,
otherwise do the multi-hop sequence to ensure can safely call into
ttm_bo_move_memcpy(), since it might also need to clear the memory.
This should give the same behaviour as before.
While we are here let's also treat calling ttm_bo_move_memcpy() with
NULL bo->resource as programmer error, where expectation is that upper
layers should now handle it.
Fixes: 180253782038 ("drm/ttm: stop allocating dummy resources during BO creation")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230208145319.397235-1-matthew.auld@intel.com
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/drm_gem_vram_helper.c | 11 | ||||
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo_util.c | 4 |
2 files changed, 13 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c index d40b3edb52d0..0bea3df2a16d 100644 --- a/drivers/gpu/drm/drm_gem_vram_helper.c +++ b/drivers/gpu/drm/drm_gem_vram_helper.c @@ -916,6 +916,17 @@ static int bo_driver_move(struct ttm_buffer_object *bo, { struct drm_gem_vram_object *gbo; + if (!bo->resource) { + if (new_mem->mem_type != TTM_PL_SYSTEM) { + hop->mem_type = TTM_PL_SYSTEM; + hop->flags = TTM_PL_FLAG_TEMPORARY; + return -EMULTIHOP; + } + + ttm_bo_move_null(bo, new_mem); + return 0; + } + gbo = drm_gem_vram_of_bo(bo); return drm_gem_vram_bo_driver_move(gbo, evict, ctx, new_mem); diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c index d9d2b0903b22..fd9fd3d15101 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_util.c +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c @@ -157,8 +157,8 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, bool clear; int ret = 0; - if (!src_mem) - return 0; + if (WARN_ON(!src_mem)) + return -EINVAL; src_man = ttm_manager_type(bdev, src_mem->mem_type); if (ttm && ((ttm->page_flags & TTM_TT_FLAG_SWAPPED) || |