fence.h revision 1.15.10.1
1 /* $NetBSD: fence.h,v 1.15.10.1 2020/02/29 20:20:17 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _LINUX_FENCE_H_ 33 #define _LINUX_FENCE_H_ 34 35 #include <sys/types.h> 36 #include <sys/condvar.h> 37 #include <sys/kernel.h> 38 #include <sys/queue.h> 39 40 #include <linux/kref.h> 41 #include <linux/rcupdate.h> 42 #include <linux/spinlock.h> 43 44 struct fence_cb; 45 46 struct fence { 47 struct kref refcount; 48 spinlock_t *lock; 49 volatile unsigned long flags; 50 unsigned context; 51 unsigned seqno; 52 const struct fence_ops *ops; 53 54 TAILQ_HEAD(, fence_cb) f_callbacks; 55 kcondvar_t f_cv; 56 struct rcu_head f_rcu; 57 }; 58 59 #define FENCE_FLAG_ENABLE_SIGNAL_BIT 0 60 #define FENCE_FLAG_SIGNALED_BIT 1 61 #define FENCE_FLAG_USER_BITS 2 62 63 struct fence_ops { 64 const char *(*get_driver_name)(struct fence *); 65 const char *(*get_timeline_name)(struct fence *); 66 bool (*enable_signaling)(struct fence *); 67 bool (*signaled)(struct fence *); 68 long (*wait)(struct fence *, bool, long); 69 void (*release)(struct fence *); 70 }; 71 72 typedef void (*fence_func_t)(struct fence *, struct fence_cb *); 73 74 struct fence_cb { 75 fence_func_t fcb_func; 76 TAILQ_ENTRY(fence_cb) fcb_entry; 77 bool fcb_onqueue; 78 }; 79 80 #define fence_add_callback linux_fence_add_callback 81 #define fence_context_alloc linux_fence_context_alloc 82 #define fence_default_wait linux_fence_default_wait 83 #define fence_destroy linux_fence_destroy 84 #define fence_enable_sw_signaling linux_fence_enable_sw_signaling 85 #define fence_free linux_fence_free 86 #define fence_get linux_fence_get 87 #define fence_get_rcu linux_fence_get_rcu 88 #define fence_init linux_fence_init 89 #define fence_is_later linux_fence_is_later 90 #define fence_is_signaled linux_fence_is_signaled 91 #define fence_is_signaled_locked linux_fence_is_signaled_locked 92 #define fence_put linux_fence_put 93 #define fence_remove_callback linux_fence_remove_callback 94 #define fence_signal linux_fence_signal 95 #define fence_signal_locked linux_fence_signal_locked 96 #define fence_wait linux_fence_wait 97 #define fence_wait_any_timeout linux_fence_wait_any_timeout 98 #define fence_wait_timeout linux_fence_wait_timeout 99 100 extern int linux_fence_trace; 101 102 void fence_init(struct fence *, const struct fence_ops *, spinlock_t *, 103 unsigned, unsigned); 104 void fence_destroy(struct fence *); 105 void fence_free(struct fence *); 106 107 unsigned 108 fence_context_alloc(unsigned); 109 bool fence_is_later(struct fence *, struct fence *); 110 111 struct fence * 112 fence_get(struct fence *); 113 struct fence * 114 fence_get_rcu(struct fence *); 115 void fence_put(struct fence *); 116 117 int fence_add_callback(struct fence *, struct fence_cb *, fence_func_t); 118 bool fence_remove_callback(struct fence *, struct fence_cb *); 119 void fence_enable_sw_signaling(struct fence *); 120 121 bool fence_is_signaled(struct fence *); 122 bool fence_is_signaled_locked(struct fence *); 123 int fence_signal(struct fence *); 124 int fence_signal_locked(struct fence *); 125 long fence_default_wait(struct fence *, bool, long); 126 long fence_wait(struct fence *, bool); 127 long fence_wait_any_timeout(struct fence **, uint32_t, bool, long); 128 long fence_wait_timeout(struct fence *, bool, long); 129 130 static inline void __printflike(2, 3) 131 FENCE_TRACE(struct fence *f, const char *fmt, ...) 132 { 133 va_list va; 134 135 if (__predict_false(linux_fence_trace)) { 136 va_start(va, fmt); 137 printf("fence %u@%u: ", f->context, f->seqno); 138 vprintf(fmt, va); 139 va_end(va); 140 } 141 } 142 143 #endif /* _LINUX_FENCE_H_ */ 144
Indexes created Mon Oct 06 21:09:46 GMT 2025