drm/i915/i915_syncmap.h

0001 /*
0002  * Copyright © 2017 Intel Corporation
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice (including the next
0012  * paragraph) shall be included in all copies or substantial portions of the
0013  * Software.
0014  *
0015  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0016  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0017  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0018  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
0019  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
0020  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
0021  * IN THE SOFTWARE.
0022  *
0023  */
0024
0025 #ifndef __I915_SYNCMAP_H__
0026 #define __I915_SYNCMAP_H__
0027
0028 #include <linux/types.h>
0029
0030 struct i915_syncmap;
0031 #define KSYNCMAP 16 /* radix of the tree, how many slots in each layer */
0032
0033 void i915_syncmap_init(struct i915_syncmap **root);
0034 int i915_syncmap_set(struct i915_syncmap **root, u64 id, u32 seqno);
0035 bool i915_syncmap_is_later(struct i915_syncmap **root, u64 id, u32 seqno);
0036 void i915_syncmap_free(struct i915_syncmap **root);
0037
0038 #endif /* __I915_SYNCMAP_H__ */