1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2014 Jeffrey Roberson <jeff@freebsd.org> 5 * Copyright (c) 2016 Matthew Macy <mmacy@mattmacy.io> 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, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef _SYS_GTASKQUEUE_H_ 33 #define _SYS_GTASKQUEUE_H_ 34 35 #ifndef _KERNEL 36 #error "no user-serviceable parts inside" 37 #endif 38 39 #include <sys/_task.h> 40 #include <sys/bus.h> 41 #include <sys/taskqueue.h> 42 #include <sys/types.h> 43 44 struct gtaskqueue; 45 46 /* 47 * Taskqueue groups. Manages dynamic thread groups and irq binding for 48 * device and other tasks. 49 */ 50 51 struct grouptask { 52 struct gtask gt_task; 53 void *gt_taskqueue; 54 LIST_ENTRY(grouptask) gt_list; 55 void *gt_uniq; 56 #define GROUPTASK_NAMELEN 32 57 char gt_name[GROUPTASK_NAMELEN]; 58 device_t gt_dev; 59 struct resource *gt_irq; 60 int gt_cpu; 61 }; 62 63 void gtaskqueue_block(struct gtaskqueue *queue); 64 void gtaskqueue_unblock(struct gtaskqueue *queue); 65 66 int gtaskqueue_cancel(struct gtaskqueue *queue, struct gtask *gtask); 67 void gtaskqueue_drain(struct gtaskqueue *queue, struct gtask *task); 68 void gtaskqueue_drain_all(struct gtaskqueue *queue); 69 70 void grouptask_block(struct grouptask *grouptask); 71 void grouptask_unblock(struct grouptask *grouptask); 72 int grouptaskqueue_enqueue(struct gtaskqueue *queue, struct gtask *task); 73 74 void taskqgroup_attach(struct taskqgroup *qgroup, struct grouptask *grptask, 75 void *uniq, device_t dev, struct resource *irq, const char *name); 76 int taskqgroup_attach_cpu(struct taskqgroup *qgroup, 77 struct grouptask *grptask, void *uniq, int cpu, device_t dev, 78 struct resource *irq, const char *name); 79 void taskqgroup_detach(struct taskqgroup *qgroup, struct grouptask *gtask); 80 struct taskqgroup *taskqgroup_create(const char *name, int cnt, int stride); 81 void taskqgroup_destroy(struct taskqgroup *qgroup); 82 void taskqgroup_bind(struct taskqgroup *qgroup); 83 84 #define GTASK_INIT(gtask, flags, priority, func, context) do { \ 85 (gtask)->ta_flags = flags; \ 86 (gtask)->ta_priority = (priority); \ 87 (gtask)->ta_func = (func); \ 88 (gtask)->ta_context = (context); \ 89 } while (0) 90 91 #define GROUPTASK_INIT(gtask, priority, func, context) \ 92 GTASK_INIT(&(gtask)->gt_task, 0, priority, func, context) 93 94 #define GROUPTASK_ENQUEUE(gtask) \ 95 grouptaskqueue_enqueue((gtask)->gt_taskqueue, &(gtask)->gt_task) 96 97 #define TASKQGROUP_DECLARE(name) \ 98 extern struct taskqgroup *qgroup_##name 99 100 #define TASKQGROUP_DEFINE(name, cnt, stride) \ 101 \ 102 struct taskqgroup *qgroup_##name; \ 103 \ 104 static void \ 105 taskqgroup_define_##name(void *arg) \ 106 { \ 107 qgroup_##name = taskqgroup_create(#name, (cnt), (stride)); \ 108 } \ 109 SYSINIT(taskqgroup_##name, SI_SUB_TASKQ, SI_ORDER_FIRST, \ 110 taskqgroup_define_##name, NULL); \ 111 \ 112 static void \ 113 taskqgroup_bind_##name(void *arg) \ 114 { \ 115 taskqgroup_bind(qgroup_##name); \ 116 } \ 117 SYSINIT(taskqgroup_bind_##name, SI_SUB_SMP, SI_ORDER_ANY, \ 118 taskqgroup_bind_##name, NULL) 119 120 TASKQGROUP_DECLARE(softirq); 121 122 #endif /* !_SYS_GTASKQUEUE_H_ */ 123