include/spl/sys/timer.h

   1 /*
   2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *  For details, see <http://zfsonlinux.org/>.
  10  *
  11  *  The SPL is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19  *  for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25 #ifndef _SPL_TIMER_H
  26 #define _SPL_TIMER_H
  27
  28 #include <linux/module.h>
  29 #include <linux/delay.h>
  30 #include <linux/sched.h>
  31 #include <linux/time.h>
  32 #include <linux/timer.h>
  33
  34 #define lbolt                           ((clock_t)jiffies)
  35 #define lbolt64                         ((int64_t)get_jiffies_64())
  36
  37 #define ddi_get_lbolt()                 ((clock_t)jiffies)
  38 #define ddi_get_lbolt64()               ((int64_t)get_jiffies_64())
  39
  40 #define ddi_time_before(a, b)           (typecheck(clock_t, a) && \
  41                                         typecheck(clock_t, b) && \
  42                                         ((a) - (b) < 0))
  43 #define ddi_time_after(a, b)            ddi_time_before(b, a)
  44 #define ddi_time_before_eq(a, b)        (!ddi_time_after(a, b))
  45 #define ddi_time_after_eq(a, b)         ddi_time_before_eq(b, a)
  46
  47 #define ddi_time_before64(a, b)         (typecheck(int64_t, a) && \
  48                                         typecheck(int64_t, b) && \
  49                                         ((a) - (b) < 0))
  50 #define ddi_time_after64(a, b)          ddi_time_before64(b, a)
  51 #define ddi_time_before_eq64(a, b)      (!ddi_time_after64(a, b))
  52 #define ddi_time_after_eq64(a, b)       ddi_time_before_eq64(b, a)
  53
  54 #define delay(ticks)                    schedule_timeout_uninterruptible(ticks)
  55
  56 /* usleep_range() introduced in 2.6.36 */
  57 #ifndef HAVE_USLEEP_RANGE
  58 static inline void
  59 usleep_range(unsigned long min, unsigned long max)
  60 {
  61         unsigned int min_ms = min / USEC_PER_MSEC;
  62
  63         if (min >= MAX_UDELAY_MS)
  64                 msleep(min_ms);
  65         else
  66                 udelay(min);
  67 }
  68 #endif /* HAVE_USLEEP_RANGE */
  69
  70 #define SEC_TO_TICK(sec)                ((sec) * HZ)
  71 #define MSEC_TO_TICK(ms)                msecs_to_jiffies(ms)
  72 #define USEC_TO_TICK(us)                usecs_to_jiffies(us)
  73 #define NSEC_TO_TICK(ns)                usecs_to_jiffies(ns / NSEC_PER_USEC)
  74
  75 #ifndef from_timer
  76 #define from_timer(var, timer, timer_field) \
  77         container_of(timer, typeof(*var), timer_field)
  78 #endif
  79
  80 #ifdef HAVE_KERNEL_TIMER_FUNCTION_TIMER_LIST
  81 typedef struct timer_list *spl_timer_list_t;
  82 #else
  83 typedef unsigned long spl_timer_list_t;
  84 #endif
  85
  86 #ifndef HAVE_KERNEL_TIMER_SETUP
  87
  88 static inline void
  89 timer_setup(struct timer_list *timer, void (*func)(spl_timer_list_t), u32 fl)
  90 {
  91 #ifdef HAVE_KERNEL_TIMER_LIST_FLAGS
  92         (timer)->flags = fl;
  93 #endif
  94         init_timer(timer);
  95         setup_timer(timer, func, (spl_timer_list_t)(timer));
  96 }
  97
  98 #endif /* HAVE_KERNEL_TIMER_SETUP */
  99
 100 #endif  /* _SPL_TIMER_H */