sys/dev/drm/include/linux/timer.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) 2014 François Tigeot
   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_TIMER_H_
  30 #define _LINUX_TIMER_H_
  31
  32 #include <linux/types.h>
  33
  34 #include <sys/param.h>
  35 #include <sys/kernel.h>
  36 #include <sys/callout.h>
  37 #include <sys/thread.h>
  38
  39 struct timer_list {
  40         struct callout  timer_callout;
  41         void            (*function)(unsigned long);
  42         unsigned long   data;
  43         unsigned long   expires;
  44         struct lwkt_token timer_token;
  45 };
  46
  47 static inline void
  48 _timer_fn(void *context)
  49 {
  50         struct timer_list *timer;
  51
  52         timer = context;
  53         timer->function(timer->data);
  54 }
  55
  56 #define setup_timer(timer, func, dat)                                   \
  57 do {                                                                    \
  58         (timer)->function = (func);                                     \
  59         (timer)->data = (dat);                                          \
  60         lwkt_token_init(&(timer)->timer_token, "timer token");  \
  61         callout_init_mp(&(timer)->timer_callout);                       \
  62 } while (0)
  63
  64 #define init_timer(timer)                                               \
  65 do {                                                                    \
  66         (timer)->function = NULL;                                       \
  67         (timer)->data = 0;                                              \
  68         lwkt_token_init(&(timer)->timer_token, "timer token");  \
  69         callout_init_mp(&(timer)->timer_callout);                       \
  70 } while (0)
  71
  72 #define mod_timer(timer, exp)                                           \
  73 do {                                                                    \
  74         (timer)->expires = (exp);                                       \
  75         lwkt_gettoken(&(timer)->timer_token);                           \
  76         callout_reset(&(timer)->timer_callout, (exp) - jiffies,         \
  77             _timer_fn, (timer));                                        \
  78         lwkt_reltoken(&(timer)->timer_token);                           \
  79 } while (0)
  80
  81 #define add_timer(timer)                                                \
  82         lwkt_gettoken(&(timer)->timer_token);                           \
  83         callout_reset(&(timer)->timer_callout,                          \
  84             (timer)->expires - jiffies, _timer_fn, (timer));            \
  85         lwkt_reltoken(&(timer)->timer_token);
  86
  87 static inline void
  88 del_timer(struct timer_list *timer)
  89 {
  90         lwkt_gettoken(&(timer)->timer_token);
  91         callout_stop(&(timer)->timer_callout);
  92         lwkt_reltoken(&(timer)->timer_token);
  93
  94         lwkt_token_uninit(&(timer)->timer_token);
  95 }
  96
  97 #define del_timer_sync(timer)   callout_drain(&(timer)->timer_callout)
  98
  99 #define timer_pending(timer)    callout_pending(&(timer)->timer_callout)
 100
 101 static inline unsigned long
 102 round_jiffies(unsigned long j)
 103 {
 104         return roundup(j, hz);
 105 }
 106
 107 static inline unsigned long
 108 round_jiffies_up(unsigned long j)
 109 {
 110         return roundup(j, hz);
 111 }
 112
 113 static inline unsigned long
 114 round_jiffies_up_relative(unsigned long j)
 115 {
 116         return roundup(j, hz);
 117 }
 118
 119 #define destroy_timer_on_stack(timer)
 120
 121 #endif /* _LINUX_TIMER_H_ */