The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 2014 Jeffrey Roberson <jeff@freebsd.org>
    3  * Copyright (c) 2016 Matthew Macy <mmacy@nextbsd.org>
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   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.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD: releng/11.1/sys/sys/gtaskqueue.h 304704 2016-08-23 21:21:56Z shurd $
   28  */
   29 
   30 #ifndef _SYS_GTASKQUEUE_H_
   31 #define _SYS_GTASKQUEUE_H_
   32 #include <sys/taskqueue.h>
   33 
   34 #ifndef _KERNEL
   35 #error "no user-servicable parts inside"
   36 #endif
   37 
   38 struct gtaskqueue;
   39 typedef void (*gtaskqueue_enqueue_fn)(void *context);
   40 
   41 /*
   42  * Taskqueue groups.  Manages dynamic thread groups and irq binding for
   43  * device and other tasks.
   44  */
   45 
   46 void    gtaskqueue_block(struct gtaskqueue *queue);
   47 void    gtaskqueue_unblock(struct gtaskqueue *queue);
   48 
   49 int     gtaskqueue_cancel(struct gtaskqueue *queue, struct gtask *gtask);
   50 void    gtaskqueue_drain(struct gtaskqueue *queue, struct gtask *task);
   51 void    gtaskqueue_drain_all(struct gtaskqueue *queue);
   52 
   53 int grouptaskqueue_enqueue(struct gtaskqueue *queue, struct gtask *task);
   54 void    taskqgroup_attach(struct taskqgroup *qgroup, struct grouptask *grptask,
   55             void *uniq, int irq, char *name);
   56 int             taskqgroup_attach_cpu(struct taskqgroup *qgroup, struct grouptask *grptask,
   57                 void *uniq, int cpu, int irq, char *name);
   58 void    taskqgroup_detach(struct taskqgroup *qgroup, struct grouptask *gtask);
   59 struct taskqgroup *taskqgroup_create(char *name);
   60 void    taskqgroup_destroy(struct taskqgroup *qgroup);
   61 int     taskqgroup_adjust(struct taskqgroup *qgroup, int cnt, int stride);
   62 
   63 #define TASK_ENQUEUED                   0x1
   64 #define TASK_SKIP_WAKEUP                0x2
   65 
   66 
   67 #define GTASK_INIT(task, flags, priority, func, context) do {   \
   68         (task)->ta_flags = flags;                               \
   69         (task)->ta_priority = (priority);               \
   70         (task)->ta_func = (func);                       \
   71         (task)->ta_context = (context);                 \
   72 } while (0)
   73 
   74 #define GROUPTASK_INIT(gtask, priority, func, context)  \
   75         GTASK_INIT(&(gtask)->gt_task, TASK_SKIP_WAKEUP, priority, func, context)
   76 
   77 #define GROUPTASK_ENQUEUE(gtask)                        \
   78         grouptaskqueue_enqueue((gtask)->gt_taskqueue, &(gtask)->gt_task)
   79 
   80 #define TASKQGROUP_DECLARE(name)                        \
   81 extern struct taskqgroup *qgroup_##name
   82 
   83 
   84 #ifdef EARLY_AP_STARTUP
   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         taskqgroup_adjust(qgroup_##name, (cnt), (stride));              \
   94 }                                                                       \
   95                                                                         \
   96 SYSINIT(taskqgroup_##name, SI_SUB_INIT_IF, SI_ORDER_FIRST,              \
   97         taskqgroup_define_##name, NULL)
   98 #else
   99 #define TASKQGROUP_DEFINE(name, cnt, stride)                            \
  100                                                                         \
  101 struct taskqgroup *qgroup_##name;                                       \
  102                                                                         \
  103 static void                                                             \
  104 taskqgroup_define_##name(void *arg)                                     \
  105 {                                                                       \
  106         qgroup_##name = taskqgroup_create(#name);                       \
  107 }                                                                       \
  108                                                                         \
  109 SYSINIT(taskqgroup_##name, SI_SUB_INIT_IF, SI_ORDER_FIRST,              \
  110         taskqgroup_define_##name, NULL);                                \
  111                                                                         \
  112 static void                                                             \
  113 taskqgroup_adjust_##name(void *arg)                                     \
  114 {                                                                       \
  115         taskqgroup_adjust(qgroup_##name, (cnt), (stride));              \
  116 }                                                                       \
  117                                                                         \
  118 SYSINIT(taskqgroup_adj_##name, SI_SUB_SMP, SI_ORDER_ANY,                \
  119         taskqgroup_adjust_##name, NULL);                                \
  120                                                                         \
  121 struct __hack
  122 #endif
  123 TASKQGROUP_DECLARE(net);
  124 
  125 #endif /* !_SYS_GTASKQUEUE_H_ */

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