gtaskqueue.h

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    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 void    taskqgroup_drain_all(struct taskqgroup *qgroup);
   84 
   85 #define GTASK_INIT(gtask, flags, priority, func, context) do {  \
   86         (gtask)->ta_flags = flags;                              \
   87         (gtask)->ta_priority = (priority);                      \
   88         (gtask)->ta_func = (func);                              \
   89         (gtask)->ta_context = (context);                        \
   90 } while (0)
   91 
   92 #define GROUPTASK_INIT(gtask, priority, func, context)  \
   93         GTASK_INIT(&(gtask)->gt_task, 0, priority, func, context)
   94 
   95 #define GROUPTASK_ENQUEUE(gtask)                        \
   96         grouptaskqueue_enqueue((gtask)->gt_taskqueue, &(gtask)->gt_task)
   97 
   98 #define TASKQGROUP_DECLARE(name)                        \
   99 extern struct taskqgroup *qgroup_##name
  100 
  101 #define TASKQGROUP_DEFINE(name, cnt, stride)                            \
  102                                                                         \
  103 struct taskqgroup *qgroup_##name;                                       \
  104                                                                         \
  105 static void                                                             \
  106 taskqgroup_define_##name(void *arg)                                     \
  107 {                                                                       \
  108         qgroup_##name = taskqgroup_create(#name, (cnt), (stride));      \
  109 }                                                                       \
  110 SYSINIT(taskqgroup_##name, SI_SUB_TASKQ, SI_ORDER_FIRST,                \
  111     taskqgroup_define_##name, NULL);                                    \
  112                                                                         \
  113 static void                                                             \
  114 taskqgroup_bind_##name(void *arg)                                       \
  115 {                                                                       \
  116         taskqgroup_bind(qgroup_##name);                                 \
  117 }                                                                       \
  118 SYSINIT(taskqgroup_bind_##name, SI_SUB_SMP, SI_ORDER_ANY,               \
  119     taskqgroup_bind_##name, NULL)
  120 
  121 TASKQGROUP_DECLARE(softirq);
  122 
  123 #endif /* !_SYS_GTASKQUEUE_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/sys/gtaskqueue.h

FreeBSD/Linux Kernel Cross Reference
sys/sys/gtaskqueue.h