sys/ofed/include/linux/wait.h

   1 /*-
   2  * Copyright (c) 2010 Isilon Systems, Inc.
   3  * Copyright (c) 2010 iX Systems, Inc.
   4  * Copyright (c) 2010 Panasas, Inc.
   5  * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
   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 unmodified, this list of conditions, and the following
  13  *    disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29 #ifndef _LINUX_WAIT_H_
  30 #define _LINUX_WAIT_H_
  31
  32 #include <linux/spinlock.h>
  33 #include <linux/sched.h>
  34 #include <linux/list.h>
  35
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/sleepqueue.h>
  39 #include <sys/kernel.h>
  40 #include <sys/proc.h>
  41
  42 struct __wait_queue_head {
  43         unsigned int    wchan;
  44 };
  45 typedef struct __wait_queue_head wait_queue_head_t;
  46
  47 #define init_waitqueue_head(x)
  48
  49 static inline void
  50 __wake_up(struct __wait_queue_head *q, int all)
  51 {
  52         int wakeup_swapper;
  53         void *c;
  54
  55         c = &q->wchan;
  56         sleepq_lock(c);
  57         if (all)
  58                 wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0);
  59         else
  60                 wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0);
  61         sleepq_release(c);
  62         if (wakeup_swapper)
  63                 kick_proc0();
  64 }
  65
  66 #define wake_up(q)                              __wake_up(q, 0)
  67 #define wake_up_nr(q, nr)                       __wake_up(q, 1)
  68 #define wake_up_all(q)                          __wake_up(q, 1)
  69 #define wake_up_interruptible(q)                __wake_up(q, 0)
  70 #define wake_up_interruptible_nr(q, nr)         __wake_up(q, 1)
  71 #define wake_up_interruptible_all(q, nr)        __wake_up(q, 1)
  72
  73 #define wait_event(q, cond)                                             \
  74 do {                                                                    \
  75         void *c = &(q).wchan;                                           \
  76         if (!(cond)) {                                                  \
  77                 for (;;) {                                              \
  78                         sleepq_lock(c);                                 \
  79                         if (cond) {                                     \
  80                                 sleepq_release(c);                      \
  81                                 break;                                  \
  82                         }                                               \
  83                         sleepq_add(c, NULL, "completion", SLEEPQ_SLEEP, 0); \
  84                         sleepq_wait(c, 0);                              \
  85                 }                                                       \
  86         }                                                               \
  87 } while (0)
  88
  89 #define wait_event_interruptible(q, cond)                               \
  90 ({                                                                      \
  91         void *c = &(q).wchan;                                           \
  92         int _error;                                                     \
  93                                                                         \
  94         _error = 0;                                                     \
  95         if (!(cond)) {                                                  \
  96                 for (; _error == 0;) {                                  \
  97                         sleepq_lock(c);                                 \
  98                         if (cond) {                                     \
  99                                 sleepq_release(c);                      \
 100                                 break;                                  \
 101                         }                                               \
 102                         sleepq_add(c, NULL, "completion",               \
 103                             SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0);    \
 104                         if (sleepq_wait_sig(c, 0))                      \
 105                                 _error = -ERESTARTSYS;                  \
 106                 }                                                       \
 107         }                                                               \
 108         -_error;                                                        \
 109 })
 110
 111 #define DEFINE_WAIT(x)
 112
 113 #endif  /* _LINUX_WAIT_H_ */