2 * Copyright (c) 2015-2020 François Tigeot <ftigeot@wolfpond.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <linux/workqueue.h>
30 struct workqueue_struct *system_wq;
31 struct workqueue_struct *system_highpri_wq;
32 struct workqueue_struct *system_long_wq;
33 struct workqueue_struct *system_unbound_wq;
34 struct workqueue_struct *system_power_efficient_wq;
36 static int init_workqueues(void *arg)
38 system_wq = alloc_workqueue("system_wq", 0, 1);
39 system_highpri_wq = alloc_workqueue("system_highpri_wq", 0, 1);
40 system_long_wq = alloc_workqueue("system_long_wq", 0, 1);
41 system_unbound_wq = alloc_workqueue("system_unbound_wq", 0, 1);
42 system_power_efficient_wq = alloc_workqueue("system_power_efficient_wq", 0, 1);
47 static int destroy_workqueues(void *arg)
49 destroy_workqueue(system_wq);
50 destroy_workqueue(system_highpri_wq);
51 destroy_workqueue(system_long_wq);
52 destroy_workqueue(system_unbound_wq);
53 destroy_workqueue(system_power_efficient_wq);
58 struct workqueue_struct *
59 _create_workqueue_common(char *name, int cpus)
61 struct workqueue_struct *wq;
63 wq = kmalloc(sizeof(*wq), M_DRM, M_WAITOK);
64 wq->taskqueue = taskqueue_create((name), M_WAITOK,
65 taskqueue_thread_enqueue, &wq->taskqueue);
66 taskqueue_start_threads(&wq->taskqueue, cpus,
67 TDPRI_KERN_DAEMON, -1, "%s", name);
73 destroy_workqueue(struct workqueue_struct *wq)
75 taskqueue_free(wq->taskqueue);
79 SYSINIT(linux_workqueue_init, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, init_workqueues, NULL);
80 SYSUNINIT(linux_workqueue_destroy, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, destroy_workqueues, NULL);
83 flush_delayed_work(struct delayed_work *dwork)
85 callout_drain(&dwork->timer);
86 return flush_work(&dwork->work);
90 drain_workqueue(struct workqueue_struct *wq)
92 lockmgr(&wq->flags_lock, LK_EXCLUSIVE);
93 wq->is_draining = true;
94 lockmgr(&wq->flags_lock, LK_RELEASE);
96 flush_taskqueue(wq->taskqueue);
98 lockmgr(&wq->flags_lock, LK_EXCLUSIVE);
99 wq->is_draining = false;
100 lockmgr(&wq->flags_lock, LK_RELEASE);