kernel.h revision 325611 
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(cond) ({					\
67      bool __ret = (cond);					\
68      if (__ret) {						\
69		printf("WARNING %s failed at %s:%d\n",		\
70		    __stringify(cond), __FILE__, __LINE__);	\
71      }								\
72      unlikely(__ret);						\
73})
74
75#undef	ALIGN
76#define	ALIGN(x, y)		roundup2((x), (y))
77#undef PTR_ALIGN
78#define	PTR_ALIGN(p, a)		((__typeof(p))ALIGN((uintptr_t)(p), (a)))
79#define	DIV_ROUND_UP		howmany
80#define	FIELD_SIZEOF(t, f)	sizeof(((t *)0)->f)
81
82#define	printk(X...)		printf(X)
83
84/*
85 * The "pr_debug()" and "pr_devel()" macros should produce zero code
86 * unless DEBUG is defined:
87 */
88#ifdef DEBUG
89#define pr_debug(fmt, ...) \
90        log(LOG_DEBUG, fmt, ##__VA_ARGS__)
91#define pr_devel(fmt, ...) \
92	log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__)
93#else
94#define pr_debug(fmt, ...) \
95        ({ if (0) log(LOG_DEBUG, fmt, ##__VA_ARGS__); 0; })
96#define pr_devel(fmt, ...) \
97	({ if (0) log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__); 0; })
98#endif
99
100#define udelay(t)       	DELAY(t)
101#define usleep_range(min,max)	DELAY(min)
102
103#ifndef pr_fmt
104#define pr_fmt(fmt) fmt
105#endif
106
107/*
108 * Print a one-time message (analogous to WARN_ONCE() et al):
109 */
110#define printk_once(...) do {			\
111	static bool __print_once;		\
112						\
113	if (!__print_once) {			\
114		__print_once = true;		\
115		printk(__VA_ARGS__);		\
116	}					\
117} while (0)
118
119/*
120 * Log a one-time message (analogous to WARN_ONCE() et al):
121 */
122#define log_once(level,...) do {		\
123	static bool __log_once;			\
124						\
125	if (!__log_once) {			\
126		__log_once = true;		\
127		log(level, __VA_ARGS__);	\
128	}					\
129} while (0)
130
131#define pr_emerg(fmt, ...) \
132	log(LOG_EMERG, pr_fmt(fmt), ##__VA_ARGS__)
133#define pr_alert(fmt, ...) \
134	log(LOG_ALERT, pr_fmt(fmt), ##__VA_ARGS__)
135#define pr_crit(fmt, ...) \
136	log(LOG_CRIT, pr_fmt(fmt), ##__VA_ARGS__)
137#define pr_err(fmt, ...) \
138	log(LOG_ERR, pr_fmt(fmt), ##__VA_ARGS__)
139#define pr_warning(fmt, ...) \
140	log(LOG_WARNING, pr_fmt(fmt), ##__VA_ARGS__)
141#define pr_warn pr_warning
142#define pr_notice(fmt, ...) \
143	log(LOG_NOTICE, pr_fmt(fmt), ##__VA_ARGS__)
144#define pr_info(fmt, ...) \
145	log(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__)
146#define pr_info_once(fmt, ...) \
147	log_once(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__)
148#define pr_cont(fmt, ...) \
149	printk(KERN_CONT fmt, ##__VA_ARGS__)
150
151#ifndef WARN
152#define WARN(condition, format...) ({                                   \
153        int __ret_warn_on = !!(condition);                              \
154        if (unlikely(__ret_warn_on))                                    \
155                pr_warning(format);                                     \
156        unlikely(__ret_warn_on);                                        \
157})
158#endif
159
160#define container_of(ptr, type, member)				\
161({								\
162	__typeof(((type *)0)->member) *_p = (ptr);		\
163	(type *)((char *)_p - offsetof(type, member));		\
164})
165
166#define	ARRAY_SIZE(x)	(sizeof(x) / sizeof((x)[0]))
167
168#define	simple_strtoul	strtoul
169#define	simple_strtol	strtol
170#define kstrtol(a,b,c) ({*(c) = strtol(a,0,b);})
171
172#define min(x, y)	((x) < (y) ? (x) : (y))
173#define max(x, y)	((x) > (y) ? (x) : (y))
174#define min_t(type, _x, _y)	((type)(_x) < (type)(_y) ? (type)(_x) : (type)(_y))
175#define max_t(type, _x, _y)	((type)(_x) > (type)(_y) ? (type)(_x) : (type)(_y))
176
177/*
178 * This looks more complex than it should be. But we need to
179 * get the type for the ~ right in round_down (it needs to be
180 * as wide as the result!), and we want to evaluate the macro
181 * arguments just once each.
182 */
183#define __round_mask(x, y) ((__typeof__(x))((y)-1))
184#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
185#define round_down(x, y) ((x) & ~__round_mask(x, y))
186
187#define	num_possible_cpus()	mp_ncpus
188#define	num_online_cpus()	mp_ncpus
189
190typedef struct pm_message {
191        int event;
192} pm_message_t;
193
194#endif	/* _LINUX_KERNEL_H_ */
195