1 /*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2021 Mellanox Technologies, Ltd.
6 * Copyright (c) 2014 François Tigeot
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice unmodified, this list of conditions, and the following
14 * disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30 #ifndef _LINUXKPI_LINUX_DELAY_H_
31 #define _LINUXKPI_LINUX_DELAY_H_
32
33 #include <linux/math.h>
34 #include <linux/sched.h>
35 #include <linux/jiffies.h>
36
37 #include <sys/systm.h>
38
39 static inline void
linux_msleep(unsigned int ms)40 linux_msleep(unsigned int ms)
41 {
42 /* guard against invalid values */
43 if (ms == 0)
44 ms = 1;
45 pause_sbt("lnxsleep", mstosbt(ms), 0, C_HARDCLOCK);
46 }
47
48 #undef msleep
49 #define msleep(ms) linux_msleep(ms)
50
51 #undef msleep_interruptible
52 #define msleep_interruptible(ms) linux_msleep_interruptible(ms)
53
54 #define udelay(t) DELAY(t)
55
56 static inline void
mdelay(unsigned long msecs)57 mdelay(unsigned long msecs)
58 {
59 while (msecs--)
60 DELAY(1000);
61 }
62
63 static inline void
ndelay(unsigned long x)64 ndelay(unsigned long x)
65 {
66 DELAY(howmany(x, 1000));
67 }
68
69 static inline void
usleep_range_state(unsigned long min,unsigned long max,unsigned int state)70 usleep_range_state(unsigned long min, unsigned long max, unsigned int state)
71 {
72 KASSERT(state == TASK_UNINTERRUPTIBLE, ("%s: state=%d unsupported\n",
73 __func__, state));
74
75 /* guard against invalid values */
76 if (min == 0)
77 min = 1;
78 pause_sbt("lnxsleep", ustosbt(min), 0, C_HARDCLOCK);
79 }
80
81 static inline void
usleep_range(unsigned long min,unsigned long max)82 usleep_range(unsigned long min, unsigned long max)
83 {
84 usleep_range_state(min, max, TASK_UNINTERRUPTIBLE);
85 }
86
87 extern unsigned int linux_msleep_interruptible(unsigned int ms);
88
89 static inline void
fsleep(unsigned long us)90 fsleep(unsigned long us)
91 {
92
93 if (us < 10)
94 udelay(us);
95 else
96 usleep_range(us, us);
97 }
98
99 #endif /* _LINUXKPI_LINUX_DELAY_H_ */
100