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drm/vmwgfx: Detach backing store from its resources when it is evicted 

When the backing store buffer is evicted, Issue a readback from the
resources and notify the resources that they are no longer bound to
a valid backing store.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Zack Rusin <zackr@vmware.com>
This commit is contained in:
Thomas Hellstrom 2012-11-21 11:29:13 +01:00
parent ddcda24e3b
commit f468911fee
1 changed files with 44 additions and 1 deletions
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45
drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
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@ -1293,11 +1293,54 @@ void vmw_fence_single_bo(struct ttm_buffer_object *bo,
* @mem: The truct ttm_mem_reg indicating to what memory
* region the move is taking place.
*
* For now does nothing.
* Evicts the Guest Backed hardware resource if the backup
* buffer is being moved out of MOB memory.
* Note that this function should not race with the resource
* validation code as long as it accesses only members of struct
* resource that remain static while bo::res is !NULL and
* while we have @bo reserved. struct resource::backup is *not* a
* static member. The resource validation code will take care
* to set @bo::res to NULL, while having @bo reserved when the
* buffer is no longer bound to the resource, so @bo:res can be
* used to determine whether there is a need to unbind and whether
* it is safe to unbind.
*/
void vmw_resource_move_notify(struct ttm_buffer_object *bo,
struct ttm_mem_reg *mem)
{
struct vmw_dma_buffer *dma_buf;
if (mem == NULL)
return;
if (bo->destroy != vmw_dmabuf_bo_free &&
bo->destroy != vmw_user_dmabuf_destroy)
return;
dma_buf = container_of(bo, struct vmw_dma_buffer, base);
if (mem->mem_type != VMW_PL_MOB) {
struct vmw_resource *res, *n;
struct ttm_bo_device *bdev = bo->bdev;
struct ttm_validate_buffer val_buf;
val_buf.bo = bo;
list_for_each_entry_safe(res, n, &dma_buf->res_list, mob_head) {
if (unlikely(res->func->unbind == NULL))
continue;
(void) res->func->unbind(res, true, &val_buf);
res->backup_dirty = true;
res->res_dirty = false;
list_del_init(&res->mob_head);
}
spin_lock(&bdev->fence_lock);
(void) ttm_bo_wait(bo, false, false, false);
spin_unlock(&bdev->fence_lock);
}
}
/**