18d59ecb2SHans Petter Selasky /*- 28d59ecb2SHans Petter Selasky * Copyright (c) 2010 Isilon Systems, Inc. 38d59ecb2SHans Petter Selasky * Copyright (c) 2010 iX Systems, Inc. 48d59ecb2SHans Petter Selasky * Copyright (c) 2010 Panasas, Inc. 5fe68f570SHans Petter Selasky * Copyright (c) 2013-2016 Mellanox Technologies, Ltd. 68d59ecb2SHans Petter Selasky * Copyright (c) 2014-2015 François Tigeot 78d59ecb2SHans Petter Selasky * All rights reserved. 88d59ecb2SHans Petter Selasky * 98d59ecb2SHans Petter Selasky * Redistribution and use in source and binary forms, with or without 108d59ecb2SHans Petter Selasky * modification, are permitted provided that the following conditions 118d59ecb2SHans Petter Selasky * are met: 128d59ecb2SHans Petter Selasky * 1. Redistributions of source code must retain the above copyright 138d59ecb2SHans Petter Selasky * notice unmodified, this list of conditions, and the following 148d59ecb2SHans Petter Selasky * disclaimer. 158d59ecb2SHans Petter Selasky * 2. Redistributions in binary form must reproduce the above copyright 168d59ecb2SHans Petter Selasky * notice, this list of conditions and the following disclaimer in the 178d59ecb2SHans Petter Selasky * documentation and/or other materials provided with the distribution. 188d59ecb2SHans Petter Selasky * 198d59ecb2SHans Petter Selasky * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 208d59ecb2SHans Petter Selasky * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 218d59ecb2SHans Petter Selasky * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 228d59ecb2SHans Petter Selasky * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 238d59ecb2SHans Petter Selasky * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 248d59ecb2SHans Petter Selasky * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 258d59ecb2SHans Petter Selasky * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 268d59ecb2SHans Petter Selasky * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 278d59ecb2SHans Petter Selasky * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 288d59ecb2SHans Petter Selasky * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 298d59ecb2SHans Petter Selasky * 308d59ecb2SHans Petter Selasky * $FreeBSD$ 318d59ecb2SHans Petter Selasky */ 328d59ecb2SHans Petter Selasky #ifndef _LINUX_KERNEL_H_ 338d59ecb2SHans Petter Selasky #define _LINUX_KERNEL_H_ 348d59ecb2SHans Petter Selasky 358d59ecb2SHans Petter Selasky #include <sys/cdefs.h> 368d59ecb2SHans Petter Selasky #include <sys/types.h> 378d59ecb2SHans Petter Selasky #include <sys/systm.h> 388d59ecb2SHans Petter Selasky #include <sys/param.h> 398d59ecb2SHans Petter Selasky #include <sys/libkern.h> 408d59ecb2SHans Petter Selasky #include <sys/stat.h> 418d59ecb2SHans Petter Selasky #include <sys/smp.h> 428d59ecb2SHans Petter Selasky #include <sys/stddef.h> 438d59ecb2SHans Petter Selasky #include <sys/syslog.h> 448f7eee5aSHans Petter Selasky #include <sys/time.h> 458d59ecb2SHans Petter Selasky 468d59ecb2SHans Petter Selasky #include <linux/bitops.h> 478d59ecb2SHans Petter Selasky #include <linux/compiler.h> 488d59ecb2SHans Petter Selasky #include <linux/errno.h> 491e3db1deSHans Petter Selasky #include <linux/sched.h> 508d59ecb2SHans Petter Selasky #include <linux/types.h> 518d59ecb2SHans Petter Selasky #include <linux/jiffies.h> 528d59ecb2SHans Petter Selasky #include <linux/log2.h> 5335555d47SHans Petter Selasky 548d59ecb2SHans Petter Selasky #include <asm/byteorder.h> 5535555d47SHans Petter Selasky #include <asm/uaccess.h> 568d59ecb2SHans Petter Selasky 57aef2a67bSHans Petter Selasky #include <machine/stdarg.h> 58aef2a67bSHans Petter Selasky 598d59ecb2SHans Petter Selasky #define KERN_CONT "" 608d59ecb2SHans Petter Selasky #define KERN_EMERG "<0>" 618d59ecb2SHans Petter Selasky #define KERN_ALERT "<1>" 628d59ecb2SHans Petter Selasky #define KERN_CRIT "<2>" 638d59ecb2SHans Petter Selasky #define KERN_ERR "<3>" 648d59ecb2SHans Petter Selasky #define KERN_WARNING "<4>" 658d59ecb2SHans Petter Selasky #define KERN_NOTICE "<5>" 668d59ecb2SHans Petter Selasky #define KERN_INFO "<6>" 678d59ecb2SHans Petter Selasky #define KERN_DEBUG "<7>" 688d59ecb2SHans Petter Selasky 69abb14a54SHans Petter Selasky #define U8_MAX ((u8)~0U) 70abb14a54SHans Petter Selasky #define S8_MAX ((s8)(U8_MAX >> 1)) 71abb14a54SHans Petter Selasky #define S8_MIN ((s8)(-S8_MAX - 1)) 72abb14a54SHans Petter Selasky #define U16_MAX ((u16)~0U) 73abb14a54SHans Petter Selasky #define S16_MAX ((s16)(U16_MAX >> 1)) 74abb14a54SHans Petter Selasky #define S16_MIN ((s16)(-S16_MAX - 1)) 75abb14a54SHans Petter Selasky #define U32_MAX ((u32)~0U) 76abb14a54SHans Petter Selasky #define S32_MAX ((s32)(U32_MAX >> 1)) 77abb14a54SHans Petter Selasky #define S32_MIN ((s32)(-S32_MAX - 1)) 78abb14a54SHans Petter Selasky #define U64_MAX ((u64)~0ULL) 79abb14a54SHans Petter Selasky #define S64_MAX ((s64)(U64_MAX >> 1)) 80abb14a54SHans Petter Selasky #define S64_MIN ((s64)(-S64_MAX - 1)) 81abb14a54SHans Petter Selasky 82abb14a54SHans Petter Selasky #define S8_C(x) x 83abb14a54SHans Petter Selasky #define U8_C(x) x ## U 84abb14a54SHans Petter Selasky #define S16_C(x) x 85abb14a54SHans Petter Selasky #define U16_C(x) x ## U 86abb14a54SHans Petter Selasky #define S32_C(x) x 87abb14a54SHans Petter Selasky #define U32_C(x) x ## U 88abb14a54SHans Petter Selasky #define S64_C(x) x ## LL 89abb14a54SHans Petter Selasky #define U64_C(x) x ## ULL 90abb14a54SHans Petter Selasky 91e9e4ec11SHans Petter Selasky #define BUILD_BUG() do { CTASSERT(0); } while (0) 928d59ecb2SHans Petter Selasky #define BUILD_BUG_ON(x) CTASSERT(!(x)) 93cb564d24SMark Johnston #define BUILD_BUG_ON_MSG(x, msg) BUILD_BUG_ON(x) 94cb564d24SMark Johnston #define BUILD_BUG_ON_NOT_POWER_OF_2(x) BUILD_BUG_ON(!powerof2(x)) 952460cbb4SHans Petter Selasky #define BUILD_BUG_ON_INVALID(expr) while (0) { (void)(expr); } 968d59ecb2SHans Petter Selasky 97c185f13bSHans Petter Selasky extern const volatile int lkpi_build_bug_on_zero; 98c185f13bSHans Petter Selasky #define BUILD_BUG_ON_ZERO(x) ((x) ? lkpi_build_bug_on_zero : 0) 99c185f13bSHans Petter Selasky 100abb14a54SHans Petter Selasky #define BUG() panic("BUG at %s:%d", __FILE__, __LINE__) 101abb14a54SHans Petter Selasky #define BUG_ON(cond) do { \ 102abb14a54SHans Petter Selasky if (cond) { \ 103abb14a54SHans Petter Selasky panic("BUG ON %s failed at %s:%d", \ 104abb14a54SHans Petter Selasky __stringify(cond), __FILE__, __LINE__); \ 105abb14a54SHans Petter Selasky } \ 106abb14a54SHans Petter Selasky } while (0) 107abb14a54SHans Petter Selasky 108abb14a54SHans Petter Selasky #define WARN_ON(cond) ({ \ 109abb14a54SHans Petter Selasky bool __ret = (cond); \ 110abb14a54SHans Petter Selasky if (__ret) { \ 111abb14a54SHans Petter Selasky printf("WARNING %s failed at %s:%d\n", \ 112abb14a54SHans Petter Selasky __stringify(cond), __FILE__, __LINE__); \ 113a164a32bSAndriy Gapon linux_dump_stack(); \ 114abb14a54SHans Petter Selasky } \ 115abb14a54SHans Petter Selasky unlikely(__ret); \ 116abb14a54SHans Petter Selasky }) 117abb14a54SHans Petter Selasky 118abb14a54SHans Petter Selasky #define WARN_ON_SMP(cond) WARN_ON(cond) 119abb14a54SHans Petter Selasky 120abb14a54SHans Petter Selasky #define WARN_ON_ONCE(cond) ({ \ 121abb14a54SHans Petter Selasky static bool __warn_on_once; \ 122abb14a54SHans Petter Selasky bool __ret = (cond); \ 123abb14a54SHans Petter Selasky if (__ret && !__warn_on_once) { \ 124abb14a54SHans Petter Selasky __warn_on_once = 1; \ 125abb14a54SHans Petter Selasky printf("WARNING %s failed at %s:%d\n", \ 126abb14a54SHans Petter Selasky __stringify(cond), __FILE__, __LINE__); \ 127a164a32bSAndriy Gapon linux_dump_stack(); \ 128abb14a54SHans Petter Selasky } \ 129abb14a54SHans Petter Selasky unlikely(__ret); \ 130abb14a54SHans Petter Selasky }) 1318d59ecb2SHans Petter Selasky 132cb564d24SMark Johnston #define oops_in_progress SCHEDULER_STOPPED() 133cb564d24SMark Johnston 1348d59ecb2SHans Petter Selasky #undef ALIGN 1358d59ecb2SHans Petter Selasky #define ALIGN(x, y) roundup2((x), (y)) 1368d59ecb2SHans Petter Selasky #undef PTR_ALIGN 1378d59ecb2SHans Petter Selasky #define PTR_ALIGN(p, a) ((__typeof(p))ALIGN((uintptr_t)(p), (a))) 138c4e0746eSJohannes Lundberg #if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 50000 139c4e0746eSJohannes Lundberg /* Moved from linuxkpi_gplv2 */ 140c4e0746eSJohannes Lundberg #define IS_ALIGNED(x, a) (((x) & ((__typeof(x))(a) - 1)) == 0) 141c4e0746eSJohannes Lundberg #endif 1428d59ecb2SHans Petter Selasky #define DIV_ROUND_UP(x, n) howmany(x, n) 143bf05cd05SHans Petter Selasky #define __KERNEL_DIV_ROUND_UP(x, n) howmany(x, n) 1448d59ecb2SHans Petter Selasky #define DIV_ROUND_UP_ULL(x, n) DIV_ROUND_UP((unsigned long long)(x), (n)) 145c4e0746eSJohannes Lundberg #define DIV_ROUND_DOWN_ULL(x, n) (((unsigned long long)(x) / (n)) * (n)) 1468d59ecb2SHans Petter Selasky #define FIELD_SIZEOF(t, f) sizeof(((t *)0)->f) 1478d59ecb2SHans Petter Selasky 148aef2a67bSHans Petter Selasky #define printk(...) printf(__VA_ARGS__) 149aef2a67bSHans Petter Selasky #define vprintk(f, a) vprintf(f, a) 150aef2a67bSHans Petter Selasky 1510df8bab6SHans Petter Selasky #define asm __asm 1520df8bab6SHans Petter Selasky 153e35079dbSHans Petter Selasky extern void linux_dump_stack(void); 154e35079dbSHans Petter Selasky #define dump_stack() linux_dump_stack() 155e35079dbSHans Petter Selasky 156aef2a67bSHans Petter Selasky struct va_format { 157aef2a67bSHans Petter Selasky const char *fmt; 158aef2a67bSHans Petter Selasky va_list *va; 159aef2a67bSHans Petter Selasky }; 160aef2a67bSHans Petter Selasky 161aef2a67bSHans Petter Selasky static inline int 162aef2a67bSHans Petter Selasky vscnprintf(char *buf, size_t size, const char *fmt, va_list args) 163aef2a67bSHans Petter Selasky { 164aef2a67bSHans Petter Selasky ssize_t ssize = size; 165aef2a67bSHans Petter Selasky int i; 166aef2a67bSHans Petter Selasky 167aef2a67bSHans Petter Selasky i = vsnprintf(buf, size, fmt, args); 168aef2a67bSHans Petter Selasky 169aef2a67bSHans Petter Selasky return ((i >= ssize) ? (ssize - 1) : i); 170aef2a67bSHans Petter Selasky } 171aef2a67bSHans Petter Selasky 172aef2a67bSHans Petter Selasky static inline int 173aef2a67bSHans Petter Selasky scnprintf(char *buf, size_t size, const char *fmt, ...) 174aef2a67bSHans Petter Selasky { 175aef2a67bSHans Petter Selasky va_list args; 176aef2a67bSHans Petter Selasky int i; 177aef2a67bSHans Petter Selasky 178aef2a67bSHans Petter Selasky va_start(args, fmt); 179aef2a67bSHans Petter Selasky i = vscnprintf(buf, size, fmt, args); 180aef2a67bSHans Petter Selasky va_end(args); 181aef2a67bSHans Petter Selasky 182aef2a67bSHans Petter Selasky return (i); 183aef2a67bSHans Petter Selasky } 1848d59ecb2SHans Petter Selasky 1858d59ecb2SHans Petter Selasky /* 1868d59ecb2SHans Petter Selasky * The "pr_debug()" and "pr_devel()" macros should produce zero code 1878d59ecb2SHans Petter Selasky * unless DEBUG is defined: 1888d59ecb2SHans Petter Selasky */ 1898d59ecb2SHans Petter Selasky #ifdef DEBUG 1904580f5eaSHans Petter Selasky extern int linuxkpi_debug; 1918d59ecb2SHans Petter Selasky #define pr_debug(fmt, ...) \ 1924580f5eaSHans Petter Selasky do { \ 1934580f5eaSHans Petter Selasky if (linuxkpi_debug) \ 1944580f5eaSHans Petter Selasky log(LOG_DEBUG, fmt, ##__VA_ARGS__); \ 1954580f5eaSHans Petter Selasky } while (0) 1968d59ecb2SHans Petter Selasky #define pr_devel(fmt, ...) \ 1978d59ecb2SHans Petter Selasky log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__) 1988d59ecb2SHans Petter Selasky #else 1998d59ecb2SHans Petter Selasky #define pr_debug(fmt, ...) \ 2008d59ecb2SHans Petter Selasky ({ if (0) log(LOG_DEBUG, fmt, ##__VA_ARGS__); 0; }) 2018d59ecb2SHans Petter Selasky #define pr_devel(fmt, ...) \ 2028d59ecb2SHans Petter Selasky ({ if (0) log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__); 0; }) 2038d59ecb2SHans Petter Selasky #endif 2048d59ecb2SHans Petter Selasky 2058d59ecb2SHans Petter Selasky #ifndef pr_fmt 2068d59ecb2SHans Petter Selasky #define pr_fmt(fmt) fmt 2078d59ecb2SHans Petter Selasky #endif 2088d59ecb2SHans Petter Selasky 2098d59ecb2SHans Petter Selasky /* 2108d59ecb2SHans Petter Selasky * Print a one-time message (analogous to WARN_ONCE() et al): 2118d59ecb2SHans Petter Selasky */ 2128d59ecb2SHans Petter Selasky #define printk_once(...) do { \ 2138d59ecb2SHans Petter Selasky static bool __print_once; \ 2148d59ecb2SHans Petter Selasky \ 2158d59ecb2SHans Petter Selasky if (!__print_once) { \ 2168d59ecb2SHans Petter Selasky __print_once = true; \ 2178d59ecb2SHans Petter Selasky printk(__VA_ARGS__); \ 2188d59ecb2SHans Petter Selasky } \ 2198d59ecb2SHans Petter Selasky } while (0) 2208d59ecb2SHans Petter Selasky 2218d59ecb2SHans Petter Selasky /* 2228d59ecb2SHans Petter Selasky * Log a one-time message (analogous to WARN_ONCE() et al): 2238d59ecb2SHans Petter Selasky */ 2248d59ecb2SHans Petter Selasky #define log_once(level,...) do { \ 2258d59ecb2SHans Petter Selasky static bool __log_once; \ 2268d59ecb2SHans Petter Selasky \ 227abb14a54SHans Petter Selasky if (unlikely(!__log_once)) { \ 2288d59ecb2SHans Petter Selasky __log_once = true; \ 2298d59ecb2SHans Petter Selasky log(level, __VA_ARGS__); \ 2308d59ecb2SHans Petter Selasky } \ 2318d59ecb2SHans Petter Selasky } while (0) 2328d59ecb2SHans Petter Selasky 2338d59ecb2SHans Petter Selasky #define pr_emerg(fmt, ...) \ 2348d59ecb2SHans Petter Selasky log(LOG_EMERG, pr_fmt(fmt), ##__VA_ARGS__) 2358d59ecb2SHans Petter Selasky #define pr_alert(fmt, ...) \ 2368d59ecb2SHans Petter Selasky log(LOG_ALERT, pr_fmt(fmt), ##__VA_ARGS__) 2378d59ecb2SHans Petter Selasky #define pr_crit(fmt, ...) \ 2388d59ecb2SHans Petter Selasky log(LOG_CRIT, pr_fmt(fmt), ##__VA_ARGS__) 2398d59ecb2SHans Petter Selasky #define pr_err(fmt, ...) \ 2408d59ecb2SHans Petter Selasky log(LOG_ERR, pr_fmt(fmt), ##__VA_ARGS__) 2418d59ecb2SHans Petter Selasky #define pr_warning(fmt, ...) \ 2428d59ecb2SHans Petter Selasky log(LOG_WARNING, pr_fmt(fmt), ##__VA_ARGS__) 243abb14a54SHans Petter Selasky #define pr_warn(...) \ 244abb14a54SHans Petter Selasky pr_warning(__VA_ARGS__) 245abb14a54SHans Petter Selasky #define pr_warn_once(fmt, ...) \ 246abb14a54SHans Petter Selasky log_once(LOG_WARNING, pr_fmt(fmt), ##__VA_ARGS__) 2478d59ecb2SHans Petter Selasky #define pr_notice(fmt, ...) \ 2488d59ecb2SHans Petter Selasky log(LOG_NOTICE, pr_fmt(fmt), ##__VA_ARGS__) 2498d59ecb2SHans Petter Selasky #define pr_info(fmt, ...) \ 2508d59ecb2SHans Petter Selasky log(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__) 2518d59ecb2SHans Petter Selasky #define pr_info_once(fmt, ...) \ 2528d59ecb2SHans Petter Selasky log_once(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__) 2538d59ecb2SHans Petter Selasky #define pr_cont(fmt, ...) \ 2548d59ecb2SHans Petter Selasky printk(KERN_CONT fmt, ##__VA_ARGS__) 255e9db3df2SHans Petter Selasky #define pr_warn_ratelimited(...) do { \ 2568f7eee5aSHans Petter Selasky static linux_ratelimit_t __ratelimited; \ 257e9db3df2SHans Petter Selasky if (linux_ratelimited(&__ratelimited)) \ 258e9db3df2SHans Petter Selasky pr_warning(__VA_ARGS__); \ 259e9db3df2SHans Petter Selasky } while (0) 2608d59ecb2SHans Petter Selasky 2618d59ecb2SHans Petter Selasky #ifndef WARN 262abb14a54SHans Petter Selasky #define WARN(condition, ...) ({ \ 263abb14a54SHans Petter Selasky bool __ret_warn_on = (condition); \ 2648d59ecb2SHans Petter Selasky if (unlikely(__ret_warn_on)) \ 265abb14a54SHans Petter Selasky pr_warning(__VA_ARGS__); \ 266abb14a54SHans Petter Selasky unlikely(__ret_warn_on); \ 267abb14a54SHans Petter Selasky }) 268abb14a54SHans Petter Selasky #endif 269abb14a54SHans Petter Selasky 270abb14a54SHans Petter Selasky #ifndef WARN_ONCE 271abb14a54SHans Petter Selasky #define WARN_ONCE(condition, ...) ({ \ 272abb14a54SHans Petter Selasky bool __ret_warn_on = (condition); \ 273abb14a54SHans Petter Selasky if (unlikely(__ret_warn_on)) \ 274abb14a54SHans Petter Selasky pr_warn_once(__VA_ARGS__); \ 2758d59ecb2SHans Petter Selasky unlikely(__ret_warn_on); \ 2768d59ecb2SHans Petter Selasky }) 2778d59ecb2SHans Petter Selasky #endif 2788d59ecb2SHans Petter Selasky 2798d59ecb2SHans Petter Selasky #define container_of(ptr, type, member) \ 2808d59ecb2SHans Petter Selasky ({ \ 281ddad2785SHans Petter Selasky const __typeof(((type *)0)->member) *__p = (ptr); \ 282ddad2785SHans Petter Selasky (type *)((uintptr_t)__p - offsetof(type, member)); \ 2838d59ecb2SHans Petter Selasky }) 2848d59ecb2SHans Petter Selasky 2858d59ecb2SHans Petter Selasky #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 2868d59ecb2SHans Petter Selasky 287ee7c3198SMark Johnston #define u64_to_user_ptr(val) ((void *)(uintptr_t)(val)) 288ee7c3198SMark Johnston 289d2f312e0SHans Petter Selasky static inline unsigned long long 290d2f312e0SHans Petter Selasky simple_strtoull(const char *cp, char **endp, unsigned int base) 291d2f312e0SHans Petter Selasky { 292d2f312e0SHans Petter Selasky return (strtouq(cp, endp, base)); 293d2f312e0SHans Petter Selasky } 294d2f312e0SHans Petter Selasky 295d2f312e0SHans Petter Selasky static inline long long 296d2f312e0SHans Petter Selasky simple_strtoll(const char *cp, char **endp, unsigned int base) 297d2f312e0SHans Petter Selasky { 298d2f312e0SHans Petter Selasky return (strtoq(cp, endp, base)); 299d2f312e0SHans Petter Selasky } 300d2f312e0SHans Petter Selasky 301d2f312e0SHans Petter Selasky static inline unsigned long 302d2f312e0SHans Petter Selasky simple_strtoul(const char *cp, char **endp, unsigned int base) 303d2f312e0SHans Petter Selasky { 304d2f312e0SHans Petter Selasky return (strtoul(cp, endp, base)); 305d2f312e0SHans Petter Selasky } 306d2f312e0SHans Petter Selasky 307d2f312e0SHans Petter Selasky static inline long 308d2f312e0SHans Petter Selasky simple_strtol(const char *cp, char **endp, unsigned int base) 309d2f312e0SHans Petter Selasky { 310d2f312e0SHans Petter Selasky return (strtol(cp, endp, base)); 311d2f312e0SHans Petter Selasky } 312d2f312e0SHans Petter Selasky 313d2f312e0SHans Petter Selasky static inline int 314d2f312e0SHans Petter Selasky kstrtoul(const char *cp, unsigned int base, unsigned long *res) 315d2f312e0SHans Petter Selasky { 316d2f312e0SHans Petter Selasky char *end; 317d2f312e0SHans Petter Selasky 318d2f312e0SHans Petter Selasky *res = strtoul(cp, &end, base); 319d2f312e0SHans Petter Selasky 320cbfc3c73SHans Petter Selasky /* skip newline character, if any */ 321cbfc3c73SHans Petter Selasky if (*end == '\n') 322cbfc3c73SHans Petter Selasky end++; 323d2f312e0SHans Petter Selasky if (*cp == 0 || *end != 0) 324d2f312e0SHans Petter Selasky return (-EINVAL); 325d2f312e0SHans Petter Selasky return (0); 326d2f312e0SHans Petter Selasky } 327d2f312e0SHans Petter Selasky 328d2f312e0SHans Petter Selasky static inline int 329d2f312e0SHans Petter Selasky kstrtol(const char *cp, unsigned int base, long *res) 330d2f312e0SHans Petter Selasky { 331d2f312e0SHans Petter Selasky char *end; 332d2f312e0SHans Petter Selasky 333d2f312e0SHans Petter Selasky *res = strtol(cp, &end, base); 334d2f312e0SHans Petter Selasky 335cbfc3c73SHans Petter Selasky /* skip newline character, if any */ 336cbfc3c73SHans Petter Selasky if (*end == '\n') 337cbfc3c73SHans Petter Selasky end++; 338d2f312e0SHans Petter Selasky if (*cp == 0 || *end != 0) 339d2f312e0SHans Petter Selasky return (-EINVAL); 340d2f312e0SHans Petter Selasky return (0); 341d2f312e0SHans Petter Selasky } 342d2f312e0SHans Petter Selasky 343d2f312e0SHans Petter Selasky static inline int 344d2f312e0SHans Petter Selasky kstrtoint(const char *cp, unsigned int base, int *res) 345d2f312e0SHans Petter Selasky { 346d2f312e0SHans Petter Selasky char *end; 347d2f312e0SHans Petter Selasky long temp; 348d2f312e0SHans Petter Selasky 349d2f312e0SHans Petter Selasky *res = temp = strtol(cp, &end, base); 350d2f312e0SHans Petter Selasky 351cbfc3c73SHans Petter Selasky /* skip newline character, if any */ 352cbfc3c73SHans Petter Selasky if (*end == '\n') 353cbfc3c73SHans Petter Selasky end++; 354d2f312e0SHans Petter Selasky if (*cp == 0 || *end != 0) 355d2f312e0SHans Petter Selasky return (-EINVAL); 356d2f312e0SHans Petter Selasky if (temp != (int)temp) 357d2f312e0SHans Petter Selasky return (-ERANGE); 358d2f312e0SHans Petter Selasky return (0); 359d2f312e0SHans Petter Selasky } 360d2f312e0SHans Petter Selasky 361d2f312e0SHans Petter Selasky static inline int 362d2f312e0SHans Petter Selasky kstrtouint(const char *cp, unsigned int base, unsigned int *res) 363d2f312e0SHans Petter Selasky { 364d2f312e0SHans Petter Selasky char *end; 365d2f312e0SHans Petter Selasky unsigned long temp; 366d2f312e0SHans Petter Selasky 367d2f312e0SHans Petter Selasky *res = temp = strtoul(cp, &end, base); 368d2f312e0SHans Petter Selasky 369cbfc3c73SHans Petter Selasky /* skip newline character, if any */ 370cbfc3c73SHans Petter Selasky if (*end == '\n') 371cbfc3c73SHans Petter Selasky end++; 372d2f312e0SHans Petter Selasky if (*cp == 0 || *end != 0) 373d2f312e0SHans Petter Selasky return (-EINVAL); 374d2f312e0SHans Petter Selasky if (temp != (unsigned int)temp) 375d2f312e0SHans Petter Selasky return (-ERANGE); 376d2f312e0SHans Petter Selasky return (0); 377d2f312e0SHans Petter Selasky } 378d2f312e0SHans Petter Selasky 379d2f312e0SHans Petter Selasky static inline int 3808e52f22bSEmmanuel Vadot kstrtou16(const char *cp, unsigned int base, u16 *res) 3818e52f22bSEmmanuel Vadot { 3828e52f22bSEmmanuel Vadot char *end; 3838e52f22bSEmmanuel Vadot unsigned long temp; 3848e52f22bSEmmanuel Vadot 3858e52f22bSEmmanuel Vadot *res = temp = strtoul(cp, &end, base); 3868e52f22bSEmmanuel Vadot 3878e52f22bSEmmanuel Vadot /* skip newline character, if any */ 3888e52f22bSEmmanuel Vadot if (*end == '\n') 3898e52f22bSEmmanuel Vadot end++; 3908e52f22bSEmmanuel Vadot if (*cp == 0 || *end != 0) 3918e52f22bSEmmanuel Vadot return (-EINVAL); 3928e52f22bSEmmanuel Vadot if (temp != (u16)temp) 3938e52f22bSEmmanuel Vadot return (-ERANGE); 3948e52f22bSEmmanuel Vadot return (0); 3958e52f22bSEmmanuel Vadot } 3968e52f22bSEmmanuel Vadot 3978e52f22bSEmmanuel Vadot static inline int 398d2f312e0SHans Petter Selasky kstrtou32(const char *cp, unsigned int base, u32 *res) 399d2f312e0SHans Petter Selasky { 400d2f312e0SHans Petter Selasky char *end; 401d2f312e0SHans Petter Selasky unsigned long temp; 402d2f312e0SHans Petter Selasky 403d2f312e0SHans Petter Selasky *res = temp = strtoul(cp, &end, base); 404d2f312e0SHans Petter Selasky 405cbfc3c73SHans Petter Selasky /* skip newline character, if any */ 406cbfc3c73SHans Petter Selasky if (*end == '\n') 407cbfc3c73SHans Petter Selasky end++; 408d2f312e0SHans Petter Selasky if (*cp == 0 || *end != 0) 409d2f312e0SHans Petter Selasky return (-EINVAL); 410d2f312e0SHans Petter Selasky if (temp != (u32)temp) 411d2f312e0SHans Petter Selasky return (-ERANGE); 412d2f312e0SHans Petter Selasky return (0); 413d2f312e0SHans Petter Selasky } 4148d59ecb2SHans Petter Selasky 41535555d47SHans Petter Selasky static inline int 41661f7fe6bSHans Petter Selasky kstrtou64(const char *cp, unsigned int base, u64 *res) 41761f7fe6bSHans Petter Selasky { 41861f7fe6bSHans Petter Selasky char *end; 41961f7fe6bSHans Petter Selasky 42061f7fe6bSHans Petter Selasky *res = strtouq(cp, &end, base); 42161f7fe6bSHans Petter Selasky 42261f7fe6bSHans Petter Selasky /* skip newline character, if any */ 42361f7fe6bSHans Petter Selasky if (*end == '\n') 42461f7fe6bSHans Petter Selasky end++; 42561f7fe6bSHans Petter Selasky if (*cp == 0 || *end != 0) 42661f7fe6bSHans Petter Selasky return (-EINVAL); 42761f7fe6bSHans Petter Selasky return (0); 42861f7fe6bSHans Petter Selasky } 42961f7fe6bSHans Petter Selasky 43061f7fe6bSHans Petter Selasky static inline int 43135555d47SHans Petter Selasky kstrtobool(const char *s, bool *res) 43235555d47SHans Petter Selasky { 43335555d47SHans Petter Selasky int len; 43435555d47SHans Petter Selasky 43535555d47SHans Petter Selasky if (s == NULL || (len = strlen(s)) == 0 || res == NULL) 43635555d47SHans Petter Selasky return (-EINVAL); 43735555d47SHans Petter Selasky 43835555d47SHans Petter Selasky /* skip newline character, if any */ 43935555d47SHans Petter Selasky if (s[len - 1] == '\n') 44035555d47SHans Petter Selasky len--; 44135555d47SHans Petter Selasky 44235555d47SHans Petter Selasky if (len == 1 && strchr("yY1", s[0]) != NULL) 44335555d47SHans Petter Selasky *res = true; 44435555d47SHans Petter Selasky else if (len == 1 && strchr("nN0", s[0]) != NULL) 44535555d47SHans Petter Selasky *res = false; 44635555d47SHans Petter Selasky else if (strncasecmp("on", s, len) == 0) 44735555d47SHans Petter Selasky *res = true; 44835555d47SHans Petter Selasky else if (strncasecmp("off", s, len) == 0) 44935555d47SHans Petter Selasky *res = false; 45035555d47SHans Petter Selasky else 45135555d47SHans Petter Selasky return (-EINVAL); 45235555d47SHans Petter Selasky 45335555d47SHans Petter Selasky return (0); 45435555d47SHans Petter Selasky } 45535555d47SHans Petter Selasky 45635555d47SHans Petter Selasky static inline int 45735555d47SHans Petter Selasky kstrtobool_from_user(const char __user *s, size_t count, bool *res) 45835555d47SHans Petter Selasky { 45935555d47SHans Petter Selasky char buf[8] = {}; 46035555d47SHans Petter Selasky 46135555d47SHans Petter Selasky if (count > (sizeof(buf) - 1)) 46235555d47SHans Petter Selasky count = (sizeof(buf) - 1); 46335555d47SHans Petter Selasky 46435555d47SHans Petter Selasky if (copy_from_user(buf, s, count)) 46535555d47SHans Petter Selasky return (-EFAULT); 46635555d47SHans Petter Selasky 46735555d47SHans Petter Selasky return (kstrtobool(buf, res)); 46835555d47SHans Petter Selasky } 46935555d47SHans Petter Selasky 4708d59ecb2SHans Petter Selasky #define min(x, y) ((x) < (y) ? (x) : (y)) 4718d59ecb2SHans Petter Selasky #define max(x, y) ((x) > (y) ? (x) : (y)) 4728d59ecb2SHans Petter Selasky 4738d59ecb2SHans Petter Selasky #define min3(a, b, c) min(a, min(b,c)) 4748d59ecb2SHans Petter Selasky #define max3(a, b, c) max(a, max(b,c)) 4758d59ecb2SHans Petter Selasky 476abb14a54SHans Petter Selasky #define min_t(type, x, y) ({ \ 477abb14a54SHans Petter Selasky type __min1 = (x); \ 478abb14a54SHans Petter Selasky type __min2 = (y); \ 479abb14a54SHans Petter Selasky __min1 < __min2 ? __min1 : __min2; }) 480abb14a54SHans Petter Selasky 481abb14a54SHans Petter Selasky #define max_t(type, x, y) ({ \ 482abb14a54SHans Petter Selasky type __max1 = (x); \ 483abb14a54SHans Petter Selasky type __max2 = (y); \ 484abb14a54SHans Petter Selasky __max1 > __max2 ? __max1 : __max2; }) 4858d59ecb2SHans Petter Selasky 486355711eaSEmmanuel Vadot #define offsetofend(t, m) \ 487355711eaSEmmanuel Vadot (offsetof(t, m) + sizeof((((t *)0)->m))) 488355711eaSEmmanuel Vadot 4898d59ecb2SHans Petter Selasky #define clamp_t(type, _x, min, max) min_t(type, max_t(type, _x, min), max) 4908d59ecb2SHans Petter Selasky #define clamp(x, lo, hi) min( max(x,lo), hi) 491abb14a54SHans Petter Selasky #define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi) 4928d59ecb2SHans Petter Selasky 4938d59ecb2SHans Petter Selasky /* 4948d59ecb2SHans Petter Selasky * This looks more complex than it should be. But we need to 4958d59ecb2SHans Petter Selasky * get the type for the ~ right in round_down (it needs to be 4968d59ecb2SHans Petter Selasky * as wide as the result!), and we want to evaluate the macro 4978d59ecb2SHans Petter Selasky * arguments just once each. 4988d59ecb2SHans Petter Selasky */ 4998d59ecb2SHans Petter Selasky #define __round_mask(x, y) ((__typeof__(x))((y)-1)) 5008d59ecb2SHans Petter Selasky #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) 5018d59ecb2SHans Petter Selasky #define round_down(x, y) ((x) & ~__round_mask(x, y)) 5028d59ecb2SHans Petter Selasky 503fe68f570SHans Petter Selasky #define smp_processor_id() PCPU_GET(cpuid) 5048d59ecb2SHans Petter Selasky #define num_possible_cpus() mp_ncpus 5058d59ecb2SHans Petter Selasky #define num_online_cpus() mp_ncpus 50603219fbaSHans Petter Selasky 50703219fbaSHans Petter Selasky #if defined(__i386__) || defined(__amd64__) 50803219fbaSHans Petter Selasky extern bool linux_cpu_has_clflush; 50903219fbaSHans Petter Selasky #define cpu_has_clflush linux_cpu_has_clflush 51003219fbaSHans Petter Selasky #endif 5118d59ecb2SHans Petter Selasky 5128d59ecb2SHans Petter Selasky typedef struct pm_message { 5138d59ecb2SHans Petter Selasky int event; 5148d59ecb2SHans Petter Selasky } pm_message_t; 5158d59ecb2SHans Petter Selasky 5168d59ecb2SHans Petter Selasky /* Swap values of a and b */ 5178d59ecb2SHans Petter Selasky #define swap(a, b) do { \ 5188d59ecb2SHans Petter Selasky typeof(a) _swap_tmp = a; \ 5198d59ecb2SHans Petter Selasky a = b; \ 5208d59ecb2SHans Petter Selasky b = _swap_tmp; \ 5218d59ecb2SHans Petter Selasky } while (0) 5228d59ecb2SHans Petter Selasky 5238d59ecb2SHans Petter Selasky #define DIV_ROUND_CLOSEST(x, divisor) (((x) + ((divisor) / 2)) / (divisor)) 5248d59ecb2SHans Petter Selasky 525abb14a54SHans Petter Selasky #define DIV_ROUND_CLOSEST_ULL(x, divisor) ({ \ 526abb14a54SHans Petter Selasky __typeof(divisor) __d = (divisor); \ 527abb14a54SHans Petter Selasky unsigned long long __ret = (x) + (__d) / 2; \ 528abb14a54SHans Petter Selasky __ret /= __d; \ 529abb14a54SHans Petter Selasky __ret; \ 530abb14a54SHans Petter Selasky }) 531abb14a54SHans Petter Selasky 5328d59ecb2SHans Petter Selasky static inline uintmax_t 5338d59ecb2SHans Petter Selasky mult_frac(uintmax_t x, uintmax_t multiplier, uintmax_t divisor) 5348d59ecb2SHans Petter Selasky { 5358d59ecb2SHans Petter Selasky uintmax_t q = (x / divisor); 5368d59ecb2SHans Petter Selasky uintmax_t r = (x % divisor); 5378d59ecb2SHans Petter Selasky 5388d59ecb2SHans Petter Selasky return ((q * multiplier) + ((r * multiplier) / divisor)); 5398d59ecb2SHans Petter Selasky } 5408d59ecb2SHans Petter Selasky 5418d59ecb2SHans Petter Selasky static inline int64_t 5428d59ecb2SHans Petter Selasky abs64(int64_t x) 5438d59ecb2SHans Petter Selasky { 5448d59ecb2SHans Petter Selasky return (x < 0 ? -x : x); 5458d59ecb2SHans Petter Selasky } 5468d59ecb2SHans Petter Selasky 5478f7eee5aSHans Petter Selasky typedef struct linux_ratelimit { 5488f7eee5aSHans Petter Selasky struct timeval lasttime; 5498f7eee5aSHans Petter Selasky int counter; 5508f7eee5aSHans Petter Selasky } linux_ratelimit_t; 5518f7eee5aSHans Petter Selasky 5528f7eee5aSHans Petter Selasky static inline bool 5538f7eee5aSHans Petter Selasky linux_ratelimited(linux_ratelimit_t *rl) 5548f7eee5aSHans Petter Selasky { 5558f7eee5aSHans Petter Selasky return (ppsratecheck(&rl->lasttime, &rl->counter, 1)); 5568f7eee5aSHans Petter Selasky } 557e9db3df2SHans Petter Selasky 558*ef5f8c18SHans Petter Selasky #define struct_size(ptr, field, num) ({ \ 559*ef5f8c18SHans Petter Selasky const size_t __size = offsetof(__typeof(*(ptr)), field); \ 560*ef5f8c18SHans Petter Selasky const size_t __max = (SIZE_MAX - __size) / sizeof((ptr)->field[0]); \ 561*ef5f8c18SHans Petter Selasky ((num) > __max) ? SIZE_MAX : (__size + sizeof((ptr)->field[0]) * (num)); \ 562*ef5f8c18SHans Petter Selasky }) 563*ef5f8c18SHans Petter Selasky 5648d59ecb2SHans Petter Selasky #endif /* _LINUX_KERNEL_H_ */ 565