2013-06-27 05:48:16 -06:00
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/*
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* Header file for reservations for dma-buf and ttm
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*
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* Copyright(C) 2011 Linaro Limited. All rights reserved.
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* Copyright (C) 2012-2013 Canonical Ltd
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* Copyright (C) 2012 Texas Instruments
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*
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* Authors:
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2014-07-01 04:57:37 -06:00
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* Rob Clark <robdclark@gmail.com>
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2013-06-27 05:48:16 -06:00
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* Maarten Lankhorst <maarten.lankhorst@canonical.com>
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* Thomas Hellstrom <thellstrom-at-vmware-dot-com>
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*
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* Based on bo.c which bears the following copyright notice,
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* but is dual licensed:
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*
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* Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _LINUX_RESERVATION_H
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#define _LINUX_RESERVATION_H
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2013-07-05 01:29:32 -06:00
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#include <linux/ww_mutex.h>
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#include <linux/fence.h>
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#include <linux/slab.h>
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extern struct ww_class reservation_ww_class;
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struct reservation_object {
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struct ww_mutex lock;
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struct fence *fence_excl;
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struct fence **fence_shared;
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u32 fence_shared_count, fence_shared_max;
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};
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static inline void
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reservation_object_init(struct reservation_object *obj)
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{
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ww_mutex_init(&obj->lock, &reservation_ww_class);
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obj->fence_shared_count = obj->fence_shared_max = 0;
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obj->fence_shared = NULL;
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obj->fence_excl = NULL;
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}
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static inline void
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reservation_object_fini(struct reservation_object *obj)
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{
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int i;
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if (obj->fence_excl)
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fence_put(obj->fence_excl);
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for (i = 0; i < obj->fence_shared_count; ++i)
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fence_put(obj->fence_shared[i]);
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kfree(obj->fence_shared);
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2013-06-27 05:48:16 -06:00
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ww_mutex_destroy(&obj->lock);
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}
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#endif /* _LINUX_RESERVATION_H */
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