drm/ttm: optionally move duplicates to a separate list

[firefly-linux-kernel-4.4.55.git] / include / drm / ttm / ttm_execbuf_util.h

diff --git a/include/drm/ttm/ttm_execbuf_util.h b/include/drm/ttm/ttm_execbuf_util.h
index ff11a424f752f112d27eea5afb546f861454a767..b620c317c7720a27127ca3fd3c54e67e374652ce 100644 (file)
--- a/include/drm/ttm/ttm_execbuf_util.h
+++ b/include/drm/ttm/ttm_execbuf_util.h
@@ -39,11 +39,13 @@
  *
  * @head:           list head for thread-private list.
  * @bo:             refcounted buffer object pointer.
+ * @shared:         should the fence be added shared?
  */
 
 struct ttm_validate_buffer {
        struct list_head head;
        struct ttm_buffer_object *bo;
+       bool shared;
 };
 
 /**
@@ -66,6 +68,7 @@ extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
  *           non-blocking reserves should be tried.
  * @list:    thread private list of ttm_validate_buffer structs.
  * @intr:    should the wait be interruptible
+ * @dups:    [out] optional list of duplicates.
  *
  * Tries to reserve bos pointed to by the list entries for validation.
  * If the function returns 0, all buffers are marked as "unfenced",
@@ -81,6 +84,11 @@ extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
  * calling process receives a signal while waiting. In that case, no
  * buffers on the list will be reserved upon return.
  *
+ * If dups is non NULL all buffers already reserved by the current thread
+ * (e.g. duplicates) are added to this list, otherwise -EALREADY is returned
+ * on the first already reserved buffer and all buffers from the list are
+ * unreserved again.
+ *
  * Buffers reserved by this function should be unreserved by
  * a call to either ttm_eu_backoff_reservation() or
  * ttm_eu_fence_buffer_objects() when command submission is complete or
@@ -88,7 +96,8 @@ extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
  */
 
 extern int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
-                                 struct list_head *list, bool intr);
+                                 struct list_head *list, bool intr,
+                                 struct list_head *dups);
 
 /**
  * function ttm_eu_fence_buffer_objects.