fence.h revision 1.15.2.2
1 1.15.2.2 pgoyette /* $NetBSD: fence.h,v 1.15.2.2 2018/09/06 06:56:36 pgoyette Exp $ */ 2 1.15.2.2 pgoyette 3 1.15.2.2 pgoyette /*- 4 1.15.2.2 pgoyette * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 1.15.2.2 pgoyette * All rights reserved. 6 1.15.2.2 pgoyette * 7 1.15.2.2 pgoyette * This code is derived from software contributed to The NetBSD Foundation 8 1.15.2.2 pgoyette * by Taylor R. Campbell. 9 1.15.2.2 pgoyette * 10 1.15.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 11 1.15.2.2 pgoyette * modification, are permitted provided that the following conditions 12 1.15.2.2 pgoyette * are met: 13 1.15.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 14 1.15.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 15 1.15.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 16 1.15.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 17 1.15.2.2 pgoyette * documentation and/or other materials provided with the distribution. 18 1.15.2.2 pgoyette * 19 1.15.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.15.2.2 pgoyette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.15.2.2 pgoyette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.15.2.2 pgoyette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.15.2.2 pgoyette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.15.2.2 pgoyette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.15.2.2 pgoyette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.15.2.2 pgoyette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.15.2.2 pgoyette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.15.2.2 pgoyette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.15.2.2 pgoyette * POSSIBILITY OF SUCH DAMAGE. 30 1.15.2.2 pgoyette */ 31 1.15.2.2 pgoyette 32 1.15.2.2 pgoyette #ifndef _LINUX_FENCE_H_ 33 1.15.2.2 pgoyette #define _LINUX_FENCE_H_ 34 1.15.2.2 pgoyette 35 1.15.2.2 pgoyette #include <sys/types.h> 36 1.15.2.2 pgoyette #include <sys/condvar.h> 37 1.15.2.2 pgoyette #include <sys/kernel.h> 38 1.15.2.2 pgoyette #include <sys/queue.h> 39 1.15.2.2 pgoyette 40 1.15.2.2 pgoyette #include <linux/kref.h> 41 1.15.2.2 pgoyette #include <linux/rcupdate.h> 42 1.15.2.2 pgoyette #include <linux/spinlock.h> 43 1.15.2.2 pgoyette 44 1.15.2.2 pgoyette struct fence_cb; 45 1.15.2.2 pgoyette 46 1.15.2.2 pgoyette struct fence { 47 1.15.2.2 pgoyette struct kref refcount; 48 1.15.2.2 pgoyette spinlock_t *lock; 49 1.15.2.2 pgoyette volatile unsigned long flags; 50 1.15.2.2 pgoyette unsigned context; 51 1.15.2.2 pgoyette unsigned seqno; 52 1.15.2.2 pgoyette const struct fence_ops *ops; 53 1.15.2.2 pgoyette 54 1.15.2.2 pgoyette TAILQ_HEAD(, fence_cb) f_callbacks; 55 1.15.2.2 pgoyette kcondvar_t f_cv; 56 1.15.2.2 pgoyette struct rcu_head f_rcu; 57 1.15.2.2 pgoyette }; 58 1.15.2.2 pgoyette 59 1.15.2.2 pgoyette #define FENCE_FLAG_ENABLE_SIGNAL_BIT 0 60 1.15.2.2 pgoyette #define FENCE_FLAG_SIGNALED_BIT 1 61 1.15.2.2 pgoyette #define FENCE_FLAG_USER_BITS 2 62 1.15.2.2 pgoyette 63 1.15.2.2 pgoyette struct fence_ops { 64 1.15.2.2 pgoyette const char *(*get_driver_name)(struct fence *); 65 1.15.2.2 pgoyette const char *(*get_timeline_name)(struct fence *); 66 1.15.2.2 pgoyette bool (*enable_signaling)(struct fence *); 67 1.15.2.2 pgoyette bool (*signaled)(struct fence *); 68 1.15.2.2 pgoyette long (*wait)(struct fence *, bool, long); 69 1.15.2.2 pgoyette void (*release)(struct fence *); 70 1.15.2.2 pgoyette }; 71 1.15.2.2 pgoyette 72 1.15.2.2 pgoyette typedef void (*fence_func_t)(struct fence *, struct fence_cb *); 73 1.15.2.2 pgoyette 74 1.15.2.2 pgoyette struct fence_cb { 75 1.15.2.2 pgoyette fence_func_t fcb_func; 76 1.15.2.2 pgoyette TAILQ_ENTRY(fence_cb) fcb_entry; 77 1.15.2.2 pgoyette bool fcb_onqueue; 78 1.15.2.2 pgoyette }; 79 1.15.2.2 pgoyette 80 1.15.2.2 pgoyette #define fence_add_callback linux_fence_add_callback 81 1.15.2.2 pgoyette #define fence_context_alloc linux_fence_context_alloc 82 1.15.2.2 pgoyette #define fence_default_wait linux_fence_default_wait 83 1.15.2.2 pgoyette #define fence_destroy linux_fence_destroy 84 1.15.2.2 pgoyette #define fence_enable_sw_signaling linux_fence_enable_sw_signaling 85 1.15.2.2 pgoyette #define fence_free linux_fence_free 86 1.15.2.2 pgoyette #define fence_get linux_fence_get 87 1.15.2.2 pgoyette #define fence_get_rcu linux_fence_get_rcu 88 1.15.2.2 pgoyette #define fence_init linux_fence_init 89 1.15.2.2 pgoyette #define fence_is_later linux_fence_is_later 90 1.15.2.2 pgoyette #define fence_is_signaled linux_fence_is_signaled 91 1.15.2.2 pgoyette #define fence_is_signaled_locked linux_fence_is_signaled_locked 92 1.15.2.2 pgoyette #define fence_put linux_fence_put 93 1.15.2.2 pgoyette #define fence_remove_callback linux_fence_remove_callback 94 1.15.2.2 pgoyette #define fence_signal linux_fence_signal 95 1.15.2.2 pgoyette #define fence_signal_locked linux_fence_signal_locked 96 1.15.2.2 pgoyette #define fence_wait linux_fence_wait 97 1.15.2.2 pgoyette #define fence_wait_any_timeout linux_fence_wait_any_timeout 98 1.15.2.2 pgoyette #define fence_wait_timeout linux_fence_wait_timeout 99 1.15.2.2 pgoyette 100 1.15.2.2 pgoyette extern int linux_fence_trace; 101 1.15.2.2 pgoyette 102 1.15.2.2 pgoyette void fence_init(struct fence *, const struct fence_ops *, spinlock_t *, 103 1.15.2.2 pgoyette unsigned, unsigned); 104 1.15.2.2 pgoyette void fence_destroy(struct fence *); 105 1.15.2.2 pgoyette void fence_free(struct fence *); 106 1.15.2.2 pgoyette 107 1.15.2.2 pgoyette unsigned 108 1.15.2.2 pgoyette fence_context_alloc(unsigned); 109 1.15.2.2 pgoyette bool fence_is_later(struct fence *, struct fence *); 110 1.15.2.2 pgoyette 111 1.15.2.2 pgoyette struct fence * 112 1.15.2.2 pgoyette fence_get(struct fence *); 113 1.15.2.2 pgoyette struct fence * 114 1.15.2.2 pgoyette fence_get_rcu(struct fence *); 115 1.15.2.2 pgoyette void fence_put(struct fence *); 116 1.15.2.2 pgoyette 117 1.15.2.2 pgoyette int fence_add_callback(struct fence *, struct fence_cb *, fence_func_t); 118 1.15.2.2 pgoyette bool fence_remove_callback(struct fence *, struct fence_cb *); 119 1.15.2.2 pgoyette void fence_enable_sw_signaling(struct fence *); 120 1.15.2.2 pgoyette 121 1.15.2.2 pgoyette bool fence_is_signaled(struct fence *); 122 1.15.2.2 pgoyette bool fence_is_signaled_locked(struct fence *); 123 1.15.2.2 pgoyette int fence_signal(struct fence *); 124 1.15.2.2 pgoyette int fence_signal_locked(struct fence *); 125 1.15.2.2 pgoyette long fence_default_wait(struct fence *, bool, long); 126 1.15.2.2 pgoyette long fence_wait(struct fence *, bool); 127 1.15.2.2 pgoyette long fence_wait_any_timeout(struct fence **, uint32_t, bool, long); 128 1.15.2.2 pgoyette long fence_wait_timeout(struct fence *, bool, long); 129 1.15.2.2 pgoyette 130 1.15.2.2 pgoyette static inline void 131 1.15.2.2 pgoyette FENCE_TRACE(struct fence *f, const char *fmt, ...) 132 1.15.2.2 pgoyette { 133 1.15.2.2 pgoyette va_list va; 134 1.15.2.2 pgoyette 135 1.15.2.2 pgoyette if (__predict_false(linux_fence_trace)) { 136 1.15.2.2 pgoyette va_start(va, fmt); 137 1.15.2.2 pgoyette printf("fence %u@%u: ", f->context, f->seqno); 138 1.15.2.2 pgoyette vprintf(fmt, va); 139 1.15.2.2 pgoyette va_end(va); 140 1.15.2.2 pgoyette } 141 1.15.2.2 pgoyette } 142 1.15.2.2 pgoyette 143 1.15.2.2 pgoyette #endif /* _LINUX_FENCE_H_ */ 144
Indexes created Tue Oct 07 03:09:49 GMT 2025