1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2017 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 #ifndef _LINUX_WORKQUEUE_H_ 32 #define _LINUX_WORKQUEUE_H_ 33 34 #include <linux/types.h> 35 #include <linux/kernel.h> 36 #include <linux/timer.h> 37 #include <linux/slab.h> 38 39 #include <asm/atomic.h> 40 41 #include <sys/param.h> 42 #include <sys/kernel.h> 43 #include <sys/taskqueue.h> 44 #include <sys/mutex.h> 45 46 #define WORK_CPU_UNBOUND MAXCPU 47 #define WQ_UNBOUND (1 << 0) 48 #define WQ_HIGHPRI (1 << 1) 49 50 struct work_struct; 51 typedef void (*work_func_t)(struct work_struct *); 52 53 struct work_exec { 54 TAILQ_ENTRY(work_exec) entry; 55 struct work_struct *target; 56 }; 57 58 struct workqueue_struct { 59 struct taskqueue *taskqueue; 60 struct mtx exec_mtx; 61 TAILQ_HEAD(, work_exec) exec_head; 62 atomic_t draining; 63 }; 64 65 #define WQ_EXEC_LOCK(wq) mtx_lock(&(wq)->exec_mtx) 66 #define WQ_EXEC_UNLOCK(wq) mtx_unlock(&(wq)->exec_mtx) 67 68 struct work_struct { 69 struct task work_task; 70 struct workqueue_struct *work_queue; 71 work_func_t func; 72 atomic_t state; 73 }; 74 75 #define DECLARE_WORK(name, fn) \ 76 struct work_struct name; \ 77 static void name##_init(void *arg) \ 78 { \ 79 INIT_WORK(&name, fn); \ 80 } \ 81 SYSINIT(name, SI_SUB_LOCK, SI_ORDER_SECOND, name##_init, NULL) 82 83 struct delayed_work { 84 struct work_struct work; 85 struct { 86 struct callout callout; 87 struct mtx mtx; 88 int expires; 89 } timer; 90 }; 91 92 #define DECLARE_DELAYED_WORK(name, fn) \ 93 struct delayed_work name; \ 94 static void name##_init(void *arg) \ 95 { \ 96 linux_init_delayed_work(&name, fn); \ 97 } \ 98 SYSINIT(name, SI_SUB_LOCK, SI_ORDER_SECOND, name##_init, NULL) 99 100 static inline struct delayed_work * 101 to_delayed_work(struct work_struct *work) 102 { 103 return (container_of(work, struct delayed_work, work)); 104 } 105 106 #define INIT_WORK(work, fn) \ 107 do { \ 108 (work)->func = (fn); \ 109 (work)->work_queue = NULL; \ 110 atomic_set(&(work)->state, 0); \ 111 TASK_INIT(&(work)->work_task, 0, linux_work_fn, (work)); \ 112 } while (0) 113 114 #define INIT_WORK_ONSTACK(work, fn) \ 115 INIT_WORK(work, fn) 116 117 #define INIT_DELAYED_WORK(dwork, fn) \ 118 linux_init_delayed_work(dwork, fn) 119 120 #define INIT_DELAYED_WORK_ONSTACK(dwork, fn) \ 121 linux_init_delayed_work(dwork, fn) 122 123 #define INIT_DEFERRABLE_WORK(dwork, fn) \ 124 INIT_DELAYED_WORK(dwork, fn) 125 126 #define flush_scheduled_work() \ 127 taskqueue_drain_all(system_wq->taskqueue) 128 129 #define queue_work(wq, work) \ 130 linux_queue_work_on(WORK_CPU_UNBOUND, wq, work) 131 132 #define schedule_work(work) \ 133 linux_queue_work_on(WORK_CPU_UNBOUND, system_wq, work) 134 135 #define queue_delayed_work(wq, dwork, delay) \ 136 linux_queue_delayed_work_on(WORK_CPU_UNBOUND, wq, dwork, delay) 137 138 #define schedule_delayed_work_on(cpu, dwork, delay) \ 139 linux_queue_delayed_work_on(cpu, system_wq, dwork, delay) 140 141 #define queue_work_on(cpu, wq, work) \ 142 linux_queue_work_on(cpu, wq, work) 143 144 #define schedule_delayed_work(dwork, delay) \ 145 linux_queue_delayed_work_on(WORK_CPU_UNBOUND, system_wq, dwork, delay) 146 147 #define queue_delayed_work_on(cpu, wq, dwork, delay) \ 148 linux_queue_delayed_work_on(cpu, wq, dwork, delay) 149 150 #define create_singlethread_workqueue(name) \ 151 linux_create_workqueue_common(name, 1) 152 153 #define create_workqueue(name) \ 154 linux_create_workqueue_common(name, mp_ncpus) 155 156 #define alloc_ordered_workqueue(name, flags) \ 157 linux_create_workqueue_common(name, 1) 158 159 #define alloc_workqueue(name, flags, max_active) \ 160 linux_create_workqueue_common(name, max_active) 161 162 #define flush_workqueue(wq) \ 163 taskqueue_drain_all((wq)->taskqueue) 164 165 #define drain_workqueue(wq) do { \ 166 atomic_inc(&(wq)->draining); \ 167 taskqueue_drain_all((wq)->taskqueue); \ 168 atomic_dec(&(wq)->draining); \ 169 } while (0) 170 171 #define mod_delayed_work(wq, dwork, delay) ({ \ 172 bool __retval; \ 173 __retval = linux_cancel_delayed_work(dwork); \ 174 linux_queue_delayed_work_on(WORK_CPU_UNBOUND, \ 175 wq, dwork, delay); \ 176 __retval; \ 177 }) 178 179 #define delayed_work_pending(dwork) \ 180 linux_work_pending(&(dwork)->work) 181 182 #define cancel_delayed_work(dwork) \ 183 linux_cancel_delayed_work(dwork) 184 185 #define cancel_work_sync(work) \ 186 linux_cancel_work_sync(work) 187 188 #define cancel_delayed_work_sync(dwork) \ 189 linux_cancel_delayed_work_sync(dwork) 190 191 #define flush_work(work) \ 192 linux_flush_work(work) 193 194 #define flush_delayed_work(dwork) \ 195 linux_flush_delayed_work(dwork) 196 197 #define work_pending(work) \ 198 linux_work_pending(work) 199 200 #define work_busy(work) \ 201 linux_work_busy(work) 202 203 #define destroy_work_on_stack(work) \ 204 do { } while (0) 205 206 #define destroy_delayed_work_on_stack(dwork) \ 207 do { } while (0) 208 209 #define destroy_workqueue(wq) \ 210 linux_destroy_workqueue(wq) 211 212 #define current_work() \ 213 linux_current_work() 214 215 /* prototypes */ 216 217 extern struct workqueue_struct *system_wq; 218 extern struct workqueue_struct *system_long_wq; 219 extern struct workqueue_struct *system_unbound_wq; 220 extern struct workqueue_struct *system_highpri_wq; 221 extern struct workqueue_struct *system_power_efficient_wq; 222 223 extern void linux_init_delayed_work(struct delayed_work *, work_func_t); 224 extern void linux_work_fn(void *, int); 225 extern void linux_delayed_work_fn(void *, int); 226 extern struct workqueue_struct *linux_create_workqueue_common(const char *, int); 227 extern void linux_destroy_workqueue(struct workqueue_struct *); 228 extern bool linux_queue_work_on(int cpu, struct workqueue_struct *, struct work_struct *); 229 extern bool linux_queue_delayed_work_on(int cpu, struct workqueue_struct *, 230 struct delayed_work *, unsigned delay); 231 extern bool linux_cancel_delayed_work(struct delayed_work *); 232 extern bool linux_cancel_work_sync(struct work_struct *); 233 extern bool linux_cancel_delayed_work_sync(struct delayed_work *); 234 extern bool linux_flush_work(struct work_struct *); 235 extern bool linux_flush_delayed_work(struct delayed_work *); 236 extern bool linux_work_pending(struct work_struct *); 237 extern bool linux_work_busy(struct work_struct *); 238 extern struct work_struct *linux_current_work(void); 239 240 #endif /* _LINUX_WORKQUEUE_H_ */ 241