sys/sys/gtaskqueue.h

   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 #include <sys/taskqueue.h>
  35
  36 #ifndef _KERNEL
  37 #error "no user-serviceable parts inside"
  38 #endif
  39
  40 struct gtaskqueue;
  41 typedef void (*gtaskqueue_enqueue_fn)(void *context);
  42
  43 /*
  44  * Taskqueue groups.  Manages dynamic thread groups and irq binding for
  45  * device and other tasks.
  46  */
  47
  48 void    gtaskqueue_block(struct gtaskqueue *queue);
  49 void    gtaskqueue_unblock(struct gtaskqueue *queue);
  50
  51 int     gtaskqueue_cancel(struct gtaskqueue *queue, struct gtask *gtask);
  52 void    gtaskqueue_drain(struct gtaskqueue *queue, struct gtask *task);
  53 void    gtaskqueue_drain_all(struct gtaskqueue *queue);
  54
  55 int grouptaskqueue_enqueue(struct gtaskqueue *queue, struct gtask *task);
  56 void    taskqgroup_attach(struct taskqgroup *qgroup, struct grouptask *grptask,
  57             void *uniq, int irq, char *name);
  58 int             taskqgroup_attach_cpu(struct taskqgroup *qgroup, struct grouptask *grptask,
  59                 void *uniq, int cpu, int irq, char *name);
  60 void    taskqgroup_detach(struct taskqgroup *qgroup, struct grouptask *gtask);
  61 struct taskqgroup *taskqgroup_create(char *name);
  62 void    taskqgroup_destroy(struct taskqgroup *qgroup);
  63 int     taskqgroup_adjust(struct taskqgroup *qgroup, int cnt, int stride);
  64
  65 #define TASK_ENQUEUED                   0x1
  66 #define TASK_SKIP_WAKEUP                0x2
  67
  68
  69 #define GTASK_INIT(task, flags, priority, func, context) do {   \
  70         (task)->ta_flags = flags;                               \
  71         (task)->ta_priority = (priority);               \
  72         (task)->ta_func = (func);                       \
  73         (task)->ta_context = (context);                 \
  74 } while (0)
  75
  76 #define GROUPTASK_INIT(gtask, priority, func, context)  \
  77         GTASK_INIT(&(gtask)->gt_task, TASK_SKIP_WAKEUP, priority, func, context)
  78
  79 #define GROUPTASK_ENQUEUE(gtask)                        \
  80         grouptaskqueue_enqueue((gtask)->gt_taskqueue, &(gtask)->gt_task)
  81
  82 #define TASKQGROUP_DECLARE(name)                        \
  83 extern struct taskqgroup *qgroup_##name
  84
  85 #define TASKQGROUP_DEFINE(name, cnt, stride)                            \
  86                                                                         \
  87 struct taskqgroup *qgroup_##name;                                       \
  88                                                                         \
  89 static void                                                             \
  90 taskqgroup_define_##name(void *arg)                                     \
  91 {                                                                       \
  92         qgroup_##name = taskqgroup_create(#name);                       \
  93 }                                                                       \
  94                                                                         \
  95 SYSINIT(taskqgroup_##name, SI_SUB_TASKQ, SI_ORDER_FIRST,                \
  96         taskqgroup_define_##name, NULL);                                \
  97                                                                         \
  98 static void                                                             \
  99 taskqgroup_adjust_##name(void *arg)                                     \
 100 {                                                                       \
 101         taskqgroup_adjust(qgroup_##name, (cnt), (stride));              \
 102 }                                                                       \
 103                                                                         \
 104 SYSINIT(taskqgroup_adj_##name, SI_SUB_SMP, SI_ORDER_ANY,                \
 105         taskqgroup_adjust_##name, NULL)
 106
 107 TASKQGROUP_DECLARE(net);
 108 TASKQGROUP_DECLARE(softirq);
 109
 110 #endif /* !_SYS_GTASKQUEUE_H_ */