From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/include/linux/reservation.h | 142 +++++++++++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) create mode 100644 kernel/include/linux/reservation.h (limited to 'kernel/include/linux/reservation.h') diff --git a/kernel/include/linux/reservation.h b/kernel/include/linux/reservation.h new file mode 100644 index 000000000..5a0b64cf6 --- /dev/null +++ b/kernel/include/linux/reservation.h @@ -0,0 +1,142 @@ +/* + * Header file for reservations for dma-buf and ttm + * + * Copyright(C) 2011 Linaro Limited. All rights reserved. + * Copyright (C) 2012-2013 Canonical Ltd + * Copyright (C) 2012 Texas Instruments + * + * Authors: + * Rob Clark + * Maarten Lankhorst + * Thomas Hellstrom + * + * Based on bo.c which bears the following copyright notice, + * but is dual licensed: + * + * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + * USE OR OTHER DEALINGS IN THE SOFTWARE. + */ +#ifndef _LINUX_RESERVATION_H +#define _LINUX_RESERVATION_H + +#include +#include +#include +#include +#include + +extern struct ww_class reservation_ww_class; +extern struct lock_class_key reservation_seqcount_class; +extern const char reservation_seqcount_string[]; + +struct reservation_object_list { + struct rcu_head rcu; + u32 shared_count, shared_max; + struct fence __rcu *shared[]; +}; + +struct reservation_object { + struct ww_mutex lock; + seqcount_t seq; + + struct fence __rcu *fence_excl; + struct reservation_object_list __rcu *fence; + struct reservation_object_list *staged; +}; + +#define reservation_object_held(obj) lockdep_is_held(&(obj)->lock.base) +#define reservation_object_assert_held(obj) \ + lockdep_assert_held(&(obj)->lock.base) + +static inline void +reservation_object_init(struct reservation_object *obj) +{ + ww_mutex_init(&obj->lock, &reservation_ww_class); + + __seqcount_init(&obj->seq, reservation_seqcount_string, &reservation_seqcount_class); + RCU_INIT_POINTER(obj->fence, NULL); + RCU_INIT_POINTER(obj->fence_excl, NULL); + obj->staged = NULL; +} + +static inline void +reservation_object_fini(struct reservation_object *obj) +{ + int i; + struct reservation_object_list *fobj; + struct fence *excl; + + /* + * This object should be dead and all references must have + * been released to it, so no need to be protected with rcu. + */ + excl = rcu_dereference_protected(obj->fence_excl, 1); + if (excl) + fence_put(excl); + + fobj = rcu_dereference_protected(obj->fence, 1); + if (fobj) { + for (i = 0; i < fobj->shared_count; ++i) + fence_put(rcu_dereference_protected(fobj->shared[i], 1)); + + kfree(fobj); + } + kfree(obj->staged); + + ww_mutex_destroy(&obj->lock); +} + +static inline struct reservation_object_list * +reservation_object_get_list(struct reservation_object *obj) +{ + return rcu_dereference_protected(obj->fence, + reservation_object_held(obj)); +} + +static inline struct fence * +reservation_object_get_excl(struct reservation_object *obj) +{ + return rcu_dereference_protected(obj->fence_excl, + reservation_object_held(obj)); +} + +int reservation_object_reserve_shared(struct reservation_object *obj); +void reservation_object_add_shared_fence(struct reservation_object *obj, + struct fence *fence); + +void reservation_object_add_excl_fence(struct reservation_object *obj, + struct fence *fence); + +int reservation_object_get_fences_rcu(struct reservation_object *obj, + struct fence **pfence_excl, + unsigned *pshared_count, + struct fence ***pshared); + +long reservation_object_wait_timeout_rcu(struct reservation_object *obj, + bool wait_all, bool intr, + unsigned long timeout); + +bool reservation_object_test_signaled_rcu(struct reservation_object *obj, + bool test_all); + +#endif /* _LINUX_RESERVATION_H */ -- cgit 1.2.3-korg