kernel.h revision 282513 
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, 2014 Mellanox Technologies, Ltd.
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_KERNEL_H_
30#define	_LINUX_KERNEL_H_
31
32#include <sys/cdefs.h>
33#include <sys/types.h>
34#include <sys/systm.h>
35#include <sys/param.h>
36#include <sys/libkern.h>
37#include <sys/stat.h>
38#include <sys/smp.h>
39#include <sys/stddef.h>
40#include <sys/syslog.h>
41
42#include <linux/bitops.h>
43#include <linux/compiler.h>
44#include <linux/errno.h>
45#include <linux/kthread.h>
46#include <linux/types.h>
47#include <linux/jiffies.h>
48#include <linux/wait.h>
49#include <linux/log2.h>
50#include <asm/byteorder.h>
51
52#define KERN_CONT       ""
53#define	KERN_EMERG	"<0>"
54#define	KERN_ALERT	"<1>"
55#define	KERN_CRIT	"<2>"
56#define	KERN_ERR	"<3>"
57#define	KERN_WARNING	"<4>"
58#define	KERN_NOTICE	"<5>"
59#define	KERN_INFO	"<6>"
60#define	KERN_DEBUG	"<7>"
61
62#define	BUILD_BUG_ON(x)		CTASSERT(!(x))
63
64#define BUG()			panic("BUG")
65#define BUG_ON(condition)	do { if (condition) BUG(); } while(0)
66#define	WARN_ON			BUG_ON
67
68#undef	ALIGN
69#define	ALIGN(x, y)		roundup2((x), (y))
70#undef PTR_ALIGN
71#define	PTR_ALIGN(p, a)		((__typeof(p))ALIGN((uintptr_t)(p), (a)))
72#define	DIV_ROUND_UP		howmany
73#define	FIELD_SIZEOF(t, f)	sizeof(((t *)0)->f)
74
75#define	printk(X...)		printf(X)
76
77/*
78 * The "pr_debug()" and "pr_devel()" macros should produce zero code
79 * unless DEBUG is defined:
80 */
81#ifdef DEBUG
82#define pr_debug(fmt, ...) \
83        log(LOG_DEBUG, fmt, ##__VA_ARGS__)
84#define pr_devel(fmt, ...) \
85	log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__)
86#else
87#define pr_debug(fmt, ...) \
88        ({ if (0) log(LOG_DEBUG, fmt, ##__VA_ARGS__); 0; })
89#define pr_devel(fmt, ...) \
90	({ if (0) log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__); 0; })
91#endif
92
93#define udelay(t)       	DELAY(t)
94#define usleep_range(min,max)	DELAY(min)
95
96#ifndef pr_fmt
97#define pr_fmt(fmt) fmt
98#endif
99
100/*
101 * Print a one-time message (analogous to WARN_ONCE() et al):
102 */
103#define printk_once(...) do {			\
104	static bool __print_once;		\
105						\
106	if (!__print_once) {			\
107		__print_once = true;		\
108		printk(__VA_ARGS__);		\
109	}					\
110} while (0)
111
112/*
113 * Log a one-time message (analogous to WARN_ONCE() et al):
114 */
115#define log_once(level,...) do {		\
116	static bool __log_once;			\
117						\
118	if (!__log_once) {			\
119		__log_once = true;		\
120		log(level, __VA_ARGS__);	\
121	}					\
122} while (0)
123
124#define pr_emerg(fmt, ...) \
125	log(LOG_EMERG, pr_fmt(fmt), ##__VA_ARGS__)
126#define pr_alert(fmt, ...) \
127	log(LOG_ALERT, pr_fmt(fmt), ##__VA_ARGS__)
128#define pr_crit(fmt, ...) \
129	log(LOG_CRIT, pr_fmt(fmt), ##__VA_ARGS__)
130#define pr_err(fmt, ...) \
131	log(LOG_ERR, pr_fmt(fmt), ##__VA_ARGS__)
132#define pr_warning(fmt, ...) \
133	log(LOG_WARNING, pr_fmt(fmt), ##__VA_ARGS__)
134#define pr_warn pr_warning
135#define pr_notice(fmt, ...) \
136	log(LOG_NOTICE, pr_fmt(fmt), ##__VA_ARGS__)
137#define pr_info(fmt, ...) \
138	log(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__)
139#define pr_info_once(fmt, ...) \
140	log_once(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__)
141#define pr_cont(fmt, ...) \
142	printk(KERN_CONT fmt, ##__VA_ARGS__)
143
144#ifndef WARN
145#define WARN(condition, format...) ({                                   \
146        int __ret_warn_on = !!(condition);                              \
147        if (unlikely(__ret_warn_on))                                    \
148                pr_warning(format);                                     \
149        unlikely(__ret_warn_on);                                        \
150})
151#endif
152
153#define container_of(ptr, type, member)				\
154({								\
155	__typeof(((type *)0)->member) *_p = (ptr);		\
156	(type *)((char *)_p - offsetof(type, member));		\
157})
158
159#define	ARRAY_SIZE(x)	(sizeof(x) / sizeof((x)[0]))
160
161#define	simple_strtoul	strtoul
162#define	simple_strtol	strtol
163#define kstrtol(a,b,c) ({*(c) = strtol(a,0,b);})
164
165#define min(x, y)	((x) < (y) ? (x) : (y))
166#define max(x, y)	((x) > (y) ? (x) : (y))
167#define min_t(type, _x, _y)	((type)(_x) < (type)(_y) ? (type)(_x) : (type)(_y))
168#define max_t(type, _x, _y)	((type)(_x) > (type)(_y) ? (type)(_x) : (type)(_y))
169
170/*
171 * This looks more complex than it should be. But we need to
172 * get the type for the ~ right in round_down (it needs to be
173 * as wide as the result!), and we want to evaluate the macro
174 * arguments just once each.
175 */
176#define __round_mask(x, y) ((__typeof__(x))((y)-1))
177#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
178#define round_down(x, y) ((x) & ~__round_mask(x, y))
179
180#define	num_possible_cpus()	mp_ncpus
181#define	num_online_cpus()	mp_ncpus
182
183typedef struct pm_message {
184        int event;
185} pm_message_t;
186
187#endif	/* _LINUX_KERNEL_H_ */
188