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786d7257 ML |
1 | /* |
2 | * Header file for reservations for dma-buf and ttm | |
3 | * | |
4 | * Copyright(C) 2011 Linaro Limited. All rights reserved. | |
5 | * Copyright (C) 2012-2013 Canonical Ltd | |
6 | * Copyright (C) 2012 Texas Instruments | |
7 | * | |
8 | * Authors: | |
9 | * Rob Clark <rob.clark@linaro.org> | |
10 | * Maarten Lankhorst <maarten.lankhorst@canonical.com> | |
11 | * Thomas Hellstrom <thellstrom-at-vmware-dot-com> | |
12 | * | |
13 | * Based on bo.c which bears the following copyright notice, | |
14 | * but is dual licensed: | |
15 | * | |
16 | * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA | |
17 | * All Rights Reserved. | |
18 | * | |
19 | * Permission is hereby granted, free of charge, to any person obtaining a | |
20 | * copy of this software and associated documentation files (the | |
21 | * "Software"), to deal in the Software without restriction, including | |
22 | * without limitation the rights to use, copy, modify, merge, publish, | |
23 | * distribute, sub license, and/or sell copies of the Software, and to | |
24 | * permit persons to whom the Software is furnished to do so, subject to | |
25 | * the following conditions: | |
26 | * | |
27 | * The above copyright notice and this permission notice (including the | |
28 | * next paragraph) shall be included in all copies or substantial portions | |
29 | * of the Software. | |
30 | * | |
31 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
32 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
33 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
34 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
35 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
36 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
37 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
38 | */ | |
39 | #ifndef _LINUX_RESERVATION_H | |
40 | #define _LINUX_RESERVATION_H | |
41 | ||
42 | #include <linux/mutex.h> | |
43 | ||
44 | extern struct ww_class reservation_ww_class; | |
45 | ||
46 | struct reservation_object { | |
47 | struct ww_mutex lock; | |
48 | }; | |
49 | ||
50 | static inline void | |
51 | reservation_object_init(struct reservation_object *obj) | |
52 | { | |
53 | ww_mutex_init(&obj->lock, &reservation_ww_class); | |
54 | } | |
55 | ||
56 | static inline void | |
57 | reservation_object_fini(struct reservation_object *obj) | |
58 | { | |
59 | ww_mutex_destroy(&obj->lock); | |
60 | } | |
61 | ||
62 | #endif /* _LINUX_RESERVATION_H */ |