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drm/vmwgfx: Make the driver work without the dummy resources

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In commit 1802537820 ("drm/ttm: stop allocating dummy resources during BO creation")
ttm stopped allocating dummy resources but vmwgfx was never ported to
handle it. Make the driver treat null resources as initial creation and
port code to handle null resources in general.

Fixes kernel oops'es on boot with vmwgfx.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Fixes: 1802537820 ("drm/ttm: stop allocating dummy resources during BO creation")
Cc: Christian König <christian.koenig@amd.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Nirmoy Das <nirmoy.das@intel.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230210023437.2214816-1-zack@kde.org
This commit is contained in:
Zack Rusin
2023-02-09 21:34:37 -05:00
parent 668b206601
commit a44df74c72
2 changed files with 16 additions and 5 deletions
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18
drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
View File

@@ -515,9 +515,13 @@ static int vmw_move(struct ttm_buffer_object *bo,
struct ttm_resource *new_mem,
struct ttm_place *hop)
{
struct ttm_resource_manager *old_man = ttm_manager_type(bo->bdev, bo->resource->mem_type);
struct ttm_resource_manager *new_man = ttm_manager_type(bo->bdev, new_mem->mem_type);
int ret;
struct ttm_resource_manager *new_man;
struct ttm_resource_manager *old_man = NULL;
int ret = 0;
new_man = ttm_manager_type(bo->bdev, new_mem->mem_type);
if (bo->resource)
old_man = ttm_manager_type(bo->bdev, bo->resource->mem_type);
if (new_man->use_tt && !vmw_memtype_is_system(new_mem->mem_type)) {
ret = vmw_ttm_bind(bo->bdev, bo->ttm, new_mem);
@@ -525,9 +529,15 @@ static int vmw_move(struct ttm_buffer_object *bo,
return ret;
}
if (!bo->resource || (bo->resource->mem_type == TTM_PL_SYSTEM &&
bo->ttm == NULL)) {
ttm_bo_move_null(bo, new_mem);
return 0;
}
vmw_move_notify(bo, bo->resource, new_mem);
if (old_man->use_tt && new_man->use_tt) {
if (old_man && old_man->use_tt && new_man->use_tt) {
if (vmw_memtype_is_system(bo->resource->mem_type)) {
ttm_bo_move_null(bo, new_mem);
return 0;