drm/ttm/vmwgfx: Have TTM manage the validation sequence.

Rather than having the driver supply the validation sequence, leave that
responsibility to TTM. This saves some confusion and a function argument.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

include/drm/ttm/ttm_bo_driver.h

@@ -515,6 +515,7 @@ struct ttm_bo_global {
  * @addr_space_mm: Range manager for the device address space.
  * lru_lock: Spinlock that protects the buffer+device lru lists and
  * ddestroy lists.
+ * @val_seq: Current validation sequence.
  * @nice_mode: Try nicely to wait for buffer idle when cleaning a manager.
  * If a GPU lockup has been detected, this is forced to 0.
  * @dev_mapping: A pointer to the struct address_space representing the
@@ -544,6 +545,7 @@ struct ttm_bo_device {
 	 * Protected by the global:lru lock.
 	 */
 	struct list_head ddestroy;
+	uint32_t val_seq;
 
 	/*
 	 * Protected by load / firstopen / lastclose /unload sync.

include/drm/ttm/ttm_execbuf_util.h

@@ -72,7 +72,6 @@ extern void ttm_eu_backoff_reservation(struct list_head *list);
  * function ttm_eu_reserve_buffers
  *
  * @list:    thread private list of ttm_validate_buffer structs.
- * @val_seq: A unique sequence number.
  *
  * Tries to reserve bos pointed to by the list entries for validation.
  * If the function returns 0, all buffers are marked as "unfenced",
@@ -94,7 +93,7 @@ extern void ttm_eu_backoff_reservation(struct list_head *list);
  * has failed.
  */
 
-extern int ttm_eu_reserve_buffers(struct list_head *list, uint32_t val_seq);
+extern int ttm_eu_reserve_buffers(struct list_head *list);
 
 /**
  * function ttm_eu_fence_buffer_objects.