drivers/gpu/drm/i915/i915_syncmap.h

   1 /*
   2  * Copyright © 2017 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #ifndef __I915_SYNCMAP_H__
  26 #define __I915_SYNCMAP_H__
  27
  28 #include <linux/types.h>
  29
  30 struct i915_syncmap;
  31 #define KSYNCMAP 16 /* radix of the tree, how many slots in each layer */
  32
  33 void i915_syncmap_init(struct i915_syncmap **root);
  34 int i915_syncmap_set(struct i915_syncmap **root, u64 id, u32 seqno);
  35 bool i915_syncmap_is_later(struct i915_syncmap **root, u64 id, u32 seqno);
  36 void i915_syncmap_free(struct i915_syncmap **root);
  37
  38 #endif /* __I915_SYNCMAP_H__ */