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>

drivers/gpu/drm/ttm/ttm_bo.c

@@ -1539,6 +1539,7 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
 	bdev->dev_mapping = NULL;
 	bdev->glob = glob;
 	bdev->need_dma32 = need_dma32;
+	bdev->val_seq = 0;
 	spin_lock_init(&bdev->fence_lock);
 	mutex_lock(&glob->device_list_mutex);
 	list_add_tail(&bdev->device_list, &glob->device_list);

drivers/gpu/drm/ttm/ttm_execbuf_util.c

@@ -126,11 +126,12 @@ EXPORT_SYMBOL(ttm_eu_backoff_reservation);
  * buffers in different orders.
  */
 
-int ttm_eu_reserve_buffers(struct list_head *list, uint32_t val_seq)
+int ttm_eu_reserve_buffers(struct list_head *list)
 {
 	struct ttm_bo_global *glob;
 	struct ttm_validate_buffer *entry;
 	int ret;
+	uint32_t val_seq;
 
 	if (list_empty(list))
 		return 0;
@@ -146,6 +147,8 @@ int ttm_eu_reserve_buffers(struct list_head *list, uint32_t val_seq)
 
 retry:
 	spin_lock(&glob->lru_lock);
+	val_seq = entry->bo->bdev->val_seq++;
+
 	list_for_each_entry(entry, list, head) {
 		struct ttm_buffer_object *bo = entry->bo;
 

drivers/gpu/drm/vmwgfx/vmwgfx_drv.h

@@ -264,7 +264,6 @@ struct vmw_private {
 	 */
 
 	struct vmw_sw_context ctx;
-	uint32_t val_seq;
 	struct mutex cmdbuf_mutex;
 
 	/**

drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c

@@ -653,8 +653,7 @@ int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
 	ret = vmw_cmd_check_all(dev_priv, sw_context, cmd, arg->command_size);
 	if (unlikely(ret != 0))
 		goto out_err;
-	ret = ttm_eu_reserve_buffers(&sw_context->validate_nodes,
-				     dev_priv->val_seq++);
+	ret = ttm_eu_reserve_buffers(&sw_context->validate_nodes);
 	if (unlikely(ret != 0))
 		goto out_err;
 

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.