dma-fence.h revision 1.6
1 /* $NetBSD: dma-fence.h,v 1.6 2021/12/19 01:40:55 riastradh 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_DMA_FENCE_H_ 33 #define _LINUX_DMA_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 dma_fence_cb; 45 46 struct dma_fence { 47 struct kref refcount; 48 spinlock_t *lock; 49 volatile unsigned long flags; 50 unsigned context; 51 unsigned seqno; 52 const struct dma_fence_ops *ops; 53 int error; 54 55 TAILQ_HEAD(, dma_fence_cb) f_callbacks; 56 kcondvar_t f_cv; 57 struct rcu_head f_rcu; 58 }; 59 60 #define DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT 0 61 #define DMA_FENCE_FLAG_SIGNALED_BIT 1 62 #define DMA_FENCE_FLAG_USER_BITS 2 63 64 struct dma_fence_ops { 65 const char *(*get_driver_name)(struct dma_fence *); 66 const char *(*get_timeline_name)(struct dma_fence *); 67 bool (*enable_signaling)(struct dma_fence *); 68 bool (*signaled)(struct dma_fence *); 69 long (*wait)(struct dma_fence *, bool, long); 70 void (*release)(struct dma_fence *); 71 }; 72 73 typedef void (*dma_fence_func_t)(struct dma_fence *, struct dma_fence_cb *); 74 75 struct dma_fence_cb { 76 dma_fence_func_t func; /* Linux API name */ 77 TAILQ_ENTRY(dma_fence_cb) fcb_entry; 78 bool fcb_onqueue; 79 }; 80 81 #define dma_fence_add_callback linux_dma_fence_add_callback 82 #define dma_fence_context_alloc linux_dma_fence_context_alloc 83 #define dma_fence_default_wait linux_dma_fence_default_wait 84 #define dma_fence_destroy linux_dma_fence_destroy 85 #define dma_fence_enable_sw_signaling linux_dma_fence_enable_sw_signaling 86 #define dma_fence_free linux_dma_fence_free 87 #define dma_fence_get linux_dma_fence_get 88 #define dma_fence_get_rcu linux_dma_fence_get_rcu 89 #define dma_fence_get_rcu_safe linux_dma_fence_get_rcu_safe 90 #define dma_fence_init linux_dma_fence_init 91 #define dma_fence_is_later linux_dma_fence_is_later 92 #define dma_fence_is_signaled linux_dma_fence_is_signaled 93 #define dma_fence_is_signaled_locked linux_dma_fence_is_signaled_locked 94 #define dma_fence_put linux_dma_fence_put 95 #define dma_fence_remove_callback linux_dma_fence_remove_callback 96 #define dma_fence_set_error linux_dma_fence_set_error 97 #define dma_fence_signal linux_dma_fence_signal 98 #define dma_fence_signal_locked linux_dma_fence_signal_locked 99 #define dma_fence_wait linux_dma_fence_wait 100 #define dma_fence_wait_any_timeout linux_dma_fence_wait_any_timeout 101 #define dma_fence_wait_timeout linux_dma_fence_wait_timeout 102 103 extern int linux_dma_fence_trace; 104 105 void dma_fence_init(struct dma_fence *, const struct dma_fence_ops *, 106 spinlock_t *, unsigned, unsigned); 107 void dma_fence_destroy(struct dma_fence *); 108 void dma_fence_free(struct dma_fence *); 109 110 unsigned 111 dma_fence_context_alloc(unsigned); 112 bool dma_fence_is_later(struct dma_fence *, struct dma_fence *); 113 114 struct dma_fence * 115 dma_fence_get(struct dma_fence *); 116 struct dma_fence * 117 dma_fence_get_rcu(struct dma_fence *); 118 struct dma_fence * 119 dma_fence_get_rcu_safe(struct dma_fence **); 120 void dma_fence_put(struct dma_fence *); 121 122 int dma_fence_add_callback(struct dma_fence *, struct dma_fence_cb *, 123 dma_fence_func_t); 124 bool dma_fence_remove_callback(struct dma_fence *, struct dma_fence_cb *); 125 void dma_fence_enable_sw_signaling(struct dma_fence *); 126 127 bool dma_fence_is_signaled(struct dma_fence *); 128 bool dma_fence_is_signaled_locked(struct dma_fence *); 129 void dma_fence_set_error(struct dma_fence *, int); 130 int dma_fence_signal(struct dma_fence *); 131 int dma_fence_signal_locked(struct dma_fence *); 132 long dma_fence_default_wait(struct dma_fence *, bool, long); 133 long dma_fence_wait(struct dma_fence *, bool); 134 long dma_fence_wait_any_timeout(struct dma_fence **, uint32_t, bool, long); 135 long dma_fence_wait_timeout(struct dma_fence *, bool, long); 136 137 static inline void __printflike(2, 3) 138 DMA_FENCE_TRACE(struct dma_fence *f, const char *fmt, ...) 139 { 140 va_list va; 141 142 if (__predict_false(linux_dma_fence_trace)) { 143 va_start(va, fmt); 144 printf("fence %u@%u: ", f->context, f->seqno); 145 vprintf(fmt, va); 146 va_end(va); 147 } 148 } 149 150 #endif /* _LINUX_DMA_FENCE_H_ */ 151
Indexes created Mon Oct 13 05:10:05 GMT 2025