| Maarten Lankhorst | 786d725 | 2013-06-27 13:48:16 +0200 | [diff] [blame] | 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 | |
| Maarten Lankhorst | 1b375dc | 2013-07-05 09:29:32 +0200 | [diff] [blame] | 42 | #include <linux/ww_mutex.h> |
| Maarten Lankhorst | 786d725 | 2013-06-27 13:48:16 +0200 | [diff] [blame] | 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 */ |