1 /*- 2 * Copyright (c) 2017 Mark Johnston <markj@FreeBSD.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice unmodified, this list of conditions, and the following 9 * disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #ifndef _LINUXKPI_LINUX_HRTIMER_H_ 29 #define _LINUXKPI_LINUX_HRTIMER_H_ 30 31 #include <sys/_callout.h> 32 #include <sys/_mutex.h> 33 34 #include <linux/ktime.h> 35 #include <linux/timer.h> 36 37 enum hrtimer_mode { 38 HRTIMER_MODE_REL, 39 HRTIMER_MODE_REL_PINNED = HRTIMER_MODE_REL, 40 }; 41 42 enum hrtimer_restart { 43 HRTIMER_RESTART, 44 HRTIMER_NORESTART, 45 }; 46 47 struct hrtimer { 48 enum hrtimer_restart (*function)(struct hrtimer *); 49 struct mtx mtx; 50 struct callout callout; 51 s64 expires; /* relative time in nanoseconds */ 52 s64 precision; /* in nanoseconds */ 53 }; 54 55 #define hrtimer_active(hrtimer) linux_hrtimer_active(hrtimer) 56 #define hrtimer_try_to_cancel(hrtimer) linux_hrtimer_try_to_cancel(hrtimer) 57 #define hrtimer_cancel(hrtimer) linux_hrtimer_cancel(hrtimer) 58 59 #define hrtimer_init(hrtimer, clock, mode) do { \ 60 CTASSERT((clock) == CLOCK_MONOTONIC); \ 61 CTASSERT((mode) == HRTIMER_MODE_REL); \ 62 linux_hrtimer_init(hrtimer); \ 63 } while (0) 64 65 #define hrtimer_set_expires(hrtimer, time) \ 66 linux_hrtimer_set_expires(hrtimer, time) 67 68 #define hrtimer_start(hrtimer, time, mode) do { \ 69 CTASSERT((mode) == HRTIMER_MODE_REL); \ 70 linux_hrtimer_start(hrtimer, time); \ 71 } while (0) 72 73 #define hrtimer_start_range_ns(hrtimer, time, prec, mode) do { \ 74 CTASSERT((mode) == HRTIMER_MODE_REL); \ 75 linux_hrtimer_start_range_ns(hrtimer, time, prec); \ 76 } while (0) 77 78 #define hrtimer_forward_now(hrtimer, interval) do { \ 79 linux_hrtimer_forward_now(hrtimer, interval); \ 80 } while (0) 81 82 bool linux_hrtimer_active(struct hrtimer *); 83 int linux_hrtimer_try_to_cancel(struct hrtimer *); 84 int linux_hrtimer_cancel(struct hrtimer *); 85 void linux_hrtimer_init(struct hrtimer *); 86 void linux_hrtimer_set_expires(struct hrtimer *, ktime_t); 87 void linux_hrtimer_start(struct hrtimer *, ktime_t); 88 void linux_hrtimer_start_range_ns(struct hrtimer *, ktime_t, int64_t); 89 void linux_hrtimer_forward_now(struct hrtimer *, ktime_t); 90 91 #endif /* _LINUXKPI_LINUX_HRTIMER_H_ */ 92