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| 5056 | serge | 1 | /* |
| 2 | * Header file for reservations for dma-buf and ttm |
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| 3 | * |
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| 4 | * Copyright(C) 2011 Linaro Limited. All rights reserved. |
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| 5 | * Copyright (C) 2012-2013 Canonical Ltd |
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| 6 | * Copyright (C) 2012 Texas Instruments |
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| 7 | * |
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| 8 | * Authors: |
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| 9 | * Rob Clark |
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| 10 | * Maarten Lankhorst |
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| 11 | * Thomas Hellstrom |
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| 12 | * |
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| 13 | * Based on bo.c which bears the following copyright notice, |
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| 14 | * but is dual licensed: |
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| 15 | * |
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| 16 | * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA |
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| 17 | * All Rights Reserved. |
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| 18 | * |
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| 19 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 20 | * copy of this software and associated documentation files (the |
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| 21 | * "Software"), to deal in the Software without restriction, including |
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| 22 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 23 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 24 | * permit persons to whom the Software is furnished to do so, subject to |
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| 25 | * the following conditions: |
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| 26 | * |
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| 27 | * The above copyright notice and this permission notice (including the |
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| 28 | * next paragraph) shall be included in all copies or substantial portions |
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| 29 | * of the Software. |
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| 30 | * |
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| 31 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 32 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 33 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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| 34 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
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| 35 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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| 36 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
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| 37 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 38 | */ |
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| 39 | #ifndef _LINUX_RESERVATION_H |
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| 40 | #define _LINUX_RESERVATION_H |
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| 41 | |||
| 42 | #include |
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| 43 | |||
| 44 | extern struct ww_class reservation_ww_class; |
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| 45 | |||
| 46 | struct reservation_object { |
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| 47 | struct ww_mutex lock; |
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| 48 | }; |
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| 49 | |||
| 50 | static inline void |
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| 51 | reservation_object_init(struct reservation_object *obj) |
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| 52 | { |
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| 53 | ww_mutex_init(&obj->lock, &reservation_ww_class); |
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| 54 | } |
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| 55 | |||
| 56 | static inline void |
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| 57 | reservation_object_fini(struct reservation_object *obj) |
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| 58 | { |
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| 59 | ww_mutex_destroy(&obj->lock); |
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| 60 | } |
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| 61 | |||
| 62 | #endif /* _LINUX_RESERVATION_H */ |