include/linux/dev_printk.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * dev_printk.h - printk messages helpers for devices
   4  *
   5  * Copyright (c) 2001-2003 Patrick Mochel <[email protected]>
   6  * Copyright (c) 2004-2009 Greg Kroah-Hartman <[email protected]>
   7  * Copyright (c) 2008-2009 Novell Inc.
   8  *
   9  */
  10
  11 #ifndef _DEVICE_PRINTK_H_
  12 #define _DEVICE_PRINTK_H_
  13
  14 #include <linux/compiler.h>
  15 #include <linux/types.h>
  16 #include <linux/ratelimit.h>
  17
  18 #ifndef dev_fmt
  19 #define dev_fmt(fmt) fmt
  20 #endif
  21
  22 struct device;
  23
  24 #ifdef CONFIG_PRINTK
  25
  26 __printf(3, 0) __cold
  27 int dev_vprintk_emit(int level, const struct device *dev,
  28                      const char *fmt, va_list args);
  29 __printf(3, 4) __cold
  30 int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...);
  31
  32 __printf(3, 4) __cold
  33 void dev_printk(const char *level, const struct device *dev,
  34                 const char *fmt, ...);
  35 __printf(2, 3) __cold
  36 void _dev_emerg(const struct device *dev, const char *fmt, ...);
  37 __printf(2, 3) __cold
  38 void _dev_alert(const struct device *dev, const char *fmt, ...);
  39 __printf(2, 3) __cold
  40 void _dev_crit(const struct device *dev, const char *fmt, ...);
  41 __printf(2, 3) __cold
  42 void _dev_err(const struct device *dev, const char *fmt, ...);
  43 __printf(2, 3) __cold
  44 void _dev_warn(const struct device *dev, const char *fmt, ...);
  45 __printf(2, 3) __cold
  46 void _dev_notice(const struct device *dev, const char *fmt, ...);
  47 __printf(2, 3) __cold
  48 void _dev_info(const struct device *dev, const char *fmt, ...);
  49
  50 #else
  51
  52 static inline __printf(3, 0)
  53 int dev_vprintk_emit(int level, const struct device *dev,
  54                      const char *fmt, va_list args)
  55 { return 0; }
  56 static inline __printf(3, 4)
  57 int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...)
  58 { return 0; }
  59
  60 static inline void __dev_printk(const char *level, const struct device *dev,
  61                                 struct va_format *vaf)
  62 {}
  63 static inline __printf(3, 4)
  64 void dev_printk(const char *level, const struct device *dev,
  65                  const char *fmt, ...)
  66 {}
  67
  68 static inline __printf(2, 3)
  69 void _dev_emerg(const struct device *dev, const char *fmt, ...)
  70 {}
  71 static inline __printf(2, 3)
  72 void _dev_crit(const struct device *dev, const char *fmt, ...)
  73 {}
  74 static inline __printf(2, 3)
  75 void _dev_alert(const struct device *dev, const char *fmt, ...)
  76 {}
  77 static inline __printf(2, 3)
  78 void _dev_err(const struct device *dev, const char *fmt, ...)
  79 {}
  80 static inline __printf(2, 3)
  81 void _dev_warn(const struct device *dev, const char *fmt, ...)
  82 {}
  83 static inline __printf(2, 3)
  84 void _dev_notice(const struct device *dev, const char *fmt, ...)
  85 {}
  86 static inline __printf(2, 3)
  87 void _dev_info(const struct device *dev, const char *fmt, ...)
  88 {}
  89
  90 #endif
  91
  92 /*
  93  * #defines for all the dev_<level> macros to prefix with whatever
  94  * possible use of #define dev_fmt(fmt) ...
  95  */
  96
  97 #define dev_emerg(dev, fmt, ...)                                        \
  98         _dev_emerg(dev, dev_fmt(fmt), ##__VA_ARGS__)
  99 #define dev_crit(dev, fmt, ...)                                         \
 100         _dev_crit(dev, dev_fmt(fmt), ##__VA_ARGS__)
 101 #define dev_alert(dev, fmt, ...)                                        \
 102         _dev_alert(dev, dev_fmt(fmt), ##__VA_ARGS__)
 103 #define dev_err(dev, fmt, ...)                                          \
 104         _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__)
 105 #define dev_warn(dev, fmt, ...)                                         \
 106         _dev_warn(dev, dev_fmt(fmt), ##__VA_ARGS__)
 107 #define dev_notice(dev, fmt, ...)                                       \
 108         _dev_notice(dev, dev_fmt(fmt), ##__VA_ARGS__)
 109 #define dev_info(dev, fmt, ...)                                         \
 110         _dev_info(dev, dev_fmt(fmt), ##__VA_ARGS__)
 111
 112 #if defined(CONFIG_DYNAMIC_DEBUG) || \
 113         (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
 114 #define dev_dbg(dev, fmt, ...)                                          \
 115         dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
 116 #elif defined(DEBUG)
 117 #define dev_dbg(dev, fmt, ...)                                          \
 118         dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
 119 #else
 120 #define dev_dbg(dev, fmt, ...)                                          \
 121 ({                                                                      \
 122         if (0)                                                          \
 123                 dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
 124 })
 125 #endif
 126
 127 #ifdef CONFIG_PRINTK
 128 #define dev_level_once(dev_level, dev, fmt, ...)                        \
 129 do {                                                                    \
 130         static bool __print_once __read_mostly;                         \
 131                                                                         \
 132         if (!__print_once) {                                            \
 133                 __print_once = true;                                    \
 134                 dev_level(dev, fmt, ##__VA_ARGS__);                     \
 135         }                                                               \
 136 } while (0)
 137 #else
 138 #define dev_level_once(dev_level, dev, fmt, ...)                        \
 139 do {                                                                    \
 140         if (0)                                                          \
 141                 dev_level(dev, fmt, ##__VA_ARGS__);                     \
 142 } while (0)
 143 #endif
 144
 145 #define dev_emerg_once(dev, fmt, ...)                                   \
 146         dev_level_once(dev_emerg, dev, fmt, ##__VA_ARGS__)
 147 #define dev_alert_once(dev, fmt, ...)                                   \
 148         dev_level_once(dev_alert, dev, fmt, ##__VA_ARGS__)
 149 #define dev_crit_once(dev, fmt, ...)                                    \
 150         dev_level_once(dev_crit, dev, fmt, ##__VA_ARGS__)
 151 #define dev_err_once(dev, fmt, ...)                                     \
 152         dev_level_once(dev_err, dev, fmt, ##__VA_ARGS__)
 153 #define dev_warn_once(dev, fmt, ...)                                    \
 154         dev_level_once(dev_warn, dev, fmt, ##__VA_ARGS__)
 155 #define dev_notice_once(dev, fmt, ...)                                  \
 156         dev_level_once(dev_notice, dev, fmt, ##__VA_ARGS__)
 157 #define dev_info_once(dev, fmt, ...)                                    \
 158         dev_level_once(dev_info, dev, fmt, ##__VA_ARGS__)
 159 #define dev_dbg_once(dev, fmt, ...)                                     \
 160         dev_level_once(dev_dbg, dev, fmt, ##__VA_ARGS__)
 161
 162 #define dev_level_ratelimited(dev_level, dev, fmt, ...)                 \
 163 do {                                                                    \
 164         static DEFINE_RATELIMIT_STATE(_rs,                              \
 165                                       DEFAULT_RATELIMIT_INTERVAL,       \
 166                                       DEFAULT_RATELIMIT_BURST);         \
 167         if (__ratelimit(&_rs))                                          \
 168                 dev_level(dev, fmt, ##__VA_ARGS__);                     \
 169 } while (0)
 170
 171 #define dev_emerg_ratelimited(dev, fmt, ...)                            \
 172         dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__)
 173 #define dev_alert_ratelimited(dev, fmt, ...)                            \
 174         dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__)
 175 #define dev_crit_ratelimited(dev, fmt, ...)                             \
 176         dev_level_ratelimited(dev_crit, dev, fmt, ##__VA_ARGS__)
 177 #define dev_err_ratelimited(dev, fmt, ...)                              \
 178         dev_level_ratelimited(dev_err, dev, fmt, ##__VA_ARGS__)
 179 #define dev_warn_ratelimited(dev, fmt, ...)                             \
 180         dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__)
 181 #define dev_notice_ratelimited(dev, fmt, ...)                           \
 182         dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__)
 183 #define dev_info_ratelimited(dev, fmt, ...)                             \
 184         dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__)
 185 #if defined(CONFIG_DYNAMIC_DEBUG) || \
 186         (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
 187 /* descriptor check is first to prevent flooding with "callbacks suppressed" */
 188 #define dev_dbg_ratelimited(dev, fmt, ...)                              \
 189 do {                                                                    \
 190         static DEFINE_RATELIMIT_STATE(_rs,                              \
 191                                       DEFAULT_RATELIMIT_INTERVAL,       \
 192                                       DEFAULT_RATELIMIT_BURST);         \
 193         DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);                 \
 194         if (DYNAMIC_DEBUG_BRANCH(descriptor) &&                         \
 195             __ratelimit(&_rs))                                          \
 196                 __dynamic_dev_dbg(&descriptor, dev, dev_fmt(fmt),       \
 197                                   ##__VA_ARGS__);                       \
 198 } while (0)
 199 #elif defined(DEBUG)
 200 #define dev_dbg_ratelimited(dev, fmt, ...)                              \
 201 do {                                                                    \
 202         static DEFINE_RATELIMIT_STATE(_rs,                              \
 203                                       DEFAULT_RATELIMIT_INTERVAL,       \
 204                                       DEFAULT_RATELIMIT_BURST);         \
 205         if (__ratelimit(&_rs))                                          \
 206                 dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
 207 } while (0)
 208 #else
 209 #define dev_dbg_ratelimited(dev, fmt, ...)                              \
 210 do {                                                                    \
 211         if (0)                                                          \
 212                 dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
 213 } while (0)
 214 #endif
 215
 216 #ifdef VERBOSE_DEBUG
 217 #define dev_vdbg        dev_dbg
 218 #else
 219 #define dev_vdbg(dev, fmt, ...)                                         \
 220 ({                                                                      \
 221         if (0)                                                          \
 222                 dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
 223 })
 224 #endif
 225
 226 /*
 227  * dev_WARN*() acts like dev_printk(), but with the key difference of
 228  * using WARN/WARN_ONCE to include file/line information and a backtrace.
 229  */
 230 #define dev_WARN(dev, format, arg...) \
 231         WARN(1, "%s %s: " format, dev_driver_string(dev), dev_name(dev), ## arg);
 232
 233 #define dev_WARN_ONCE(dev, condition, format, arg...) \
 234         WARN_ONCE(condition, "%s %s: " format, \
 235                         dev_driver_string(dev), dev_name(dev), ## arg)
 236
 237 #endif /* _DEVICE_PRINTK_H_ */