1 /*- 2 * Copyright (c) 2009 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/kernel.h> 32 #include <sys/kmem.h> 33 #include <sys/lock.h> 34 #include <sys/mutex.h> 35 #include <sys/queue.h> 36 #include <sys/taskqueue.h> 37 #include <sys/taskq.h> 38 39 #include <vm/uma.h> 40 41 static uma_zone_t taskq_zone; 42 43 struct ostask { 44 struct task ost_task; 45 task_func_t *ost_func; 46 void *ost_arg; 47 }; 48 49 taskq_t *system_taskq = NULL; 50 51 static void 52 system_taskq_init(void *arg) 53 { 54 55 system_taskq = (taskq_t *)taskqueue_thread; 56 taskq_zone = uma_zcreate("taskq_zone", sizeof(struct ostask), 57 NULL, NULL, NULL, NULL, 0, 0); 58 } 59 SYSINIT(system_taskq_init, SI_SUB_CONFIGURE, SI_ORDER_ANY, system_taskq_init, NULL); 60 61 static void 62 system_taskq_fini(void *arg) 63 { 64 65 uma_zdestroy(taskq_zone); 66 } 67 SYSUNINIT(system_taskq_fini, SI_SUB_CONFIGURE, SI_ORDER_ANY, system_taskq_fini, NULL); 68 69 taskq_t * 70 taskq_create(const char *name, int nthreads, pri_t pri, int minalloc __unused, 71 int maxalloc __unused, uint_t flags) 72 { 73 taskq_t *tq; 74 75 if ((flags & TASKQ_THREADS_CPU_PCT) != 0) { 76 /* TODO: Calculate number od threads. */ 77 printf("%s: TASKQ_THREADS_CPU_PCT\n", __func__); 78 } 79 80 tq = kmem_alloc(sizeof(*tq), KM_SLEEP); 81 tq->tq_queue = taskqueue_create(name, M_WAITOK, taskqueue_thread_enqueue, 82 &tq->tq_queue); 83 (void) taskqueue_start_threads(&tq->tq_queue, nthreads, pri, name); 84 85 return ((taskq_t *)tq); 86 } 87 88 void 89 taskq_destroy(taskq_t *tq) 90 { 91 92 taskqueue_free(tq->tq_queue); 93 kmem_free(tq, sizeof(*tq)); 94 } 95 96 int 97 taskq_member(taskq_t *tq, kthread_t *thread) 98 { 99 100 return (taskqueue_member(tq->tq_queue, thread)); 101 } 102 103 static void 104 taskq_run(void *arg, int pending __unused) 105 { 106 struct ostask *task = arg; 107 108 task->ost_func(task->ost_arg); 109 110 uma_zfree(taskq_zone, task); 111 } 112 113 taskqid_t 114 taskq_dispatch(taskq_t *tq, task_func_t func, void *arg, uint_t flags) 115 { 116 struct ostask *task; 117 int mflag; 118 119 if ((flags & (TQ_SLEEP | TQ_NOQUEUE)) == TQ_SLEEP) 120 mflag = M_WAITOK; 121 else 122 mflag = M_NOWAIT; 123 124 task = uma_zalloc(taskq_zone, mflag); 125 if (task == NULL) 126 return (0); 127 128 task->ost_func = func; 129 task->ost_arg = arg; 130 131 TASK_INIT(&task->ost_task, 0, taskq_run, task); 132 taskqueue_enqueue(tq->tq_queue, &task->ost_task); 133 134 return ((taskqid_t)(void *)task); 135 } 136