/*-
 * Copyright (c) 2010 Isilon Systems, Inc.
 * Copyright (c) 2010 iX Systems, Inc.
 * Copyright (c) 2010 Panasas, Inc.
 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef _LINUXKPI_LINUX_TIMER_H_
#define _LINUXKPI_LINUX_TIMER_H_

#include <linux/types.h>

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/callout.h>

struct timer_list {
        struct callout callout;
        union {
                void (*function) (unsigned long);       /* < v4.15 */
                void (*function_415) (struct timer_list *);
        };
        unsigned long data;
        unsigned long expires;
};

extern unsigned long linux_timer_hz_mask;

#define TIMER_IRQSAFE   0x0001

#if defined(LINUXKPI_VERSION) && (LINUXKPI_VERSION < 61600)
#define from_timer(var, arg, field)                                     \
        container_of(arg, typeof(*(var)), field)
#else
#define timer_container_of(var, arg, field)                             \
    container_of(arg, typeof(*(var)), field)
#endif

#define timer_setup(timer, func, flags) do {                            \
        CTASSERT(((flags) & ~TIMER_IRQSAFE) == 0);                      \
        (timer)->function_415 = (func);                                 \
        (timer)->data = (unsigned long)(timer);                         \
        callout_init(&(timer)->callout, 1);                             \
} while (0)

#define setup_timer(timer, func, dat) do {                              \
        (timer)->function = (func);                                     \
        (timer)->data = (dat);                                          \
        callout_init(&(timer)->callout, 1);                     \
} while (0)

#define __setup_timer(timer, func, dat, flags) do {                     \
        CTASSERT(((flags) & ~TIMER_IRQSAFE) == 0);                      \
        setup_timer(timer, func, dat);                                  \
} while (0)

#define init_timer(timer) do {                                          \
        (timer)->function = NULL;                                       \
        (timer)->data = 0;                                              \
        callout_init(&(timer)->callout, 1);                     \
} while (0)

extern int mod_timer(struct timer_list *, unsigned long);
extern void add_timer(struct timer_list *);
extern void add_timer_on(struct timer_list *, int cpu);

extern int timer_delete(struct timer_list *);
extern int timer_delete_sync(struct timer_list *);
extern int timer_shutdown_sync(struct timer_list *);

static inline int
del_timer(struct timer_list *tl)
{
        return (timer_delete(tl));
}

static inline int
del_timer_sync(struct timer_list *tl)
{
        return (timer_delete_sync(tl));
}

#define timer_pending(timer)    callout_pending(&(timer)->callout)
#define round_jiffies(j)        \
        ((unsigned long)(((j) + linux_timer_hz_mask) & ~linux_timer_hz_mask))
#define round_jiffies_relative(j) round_jiffies(j)
#define round_jiffies_up(j)     round_jiffies(j)
#define round_jiffies_up_relative(j) round_jiffies_up(j)

#endif                                  /* _LINUXKPI_LINUX_TIMER_H_ */