278 lines
9.1 KiB
C
278 lines
9.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* dev_printk.h - printk messages helpers for devices
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*
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* Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
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* Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
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* Copyright (c) 2008-2009 Novell Inc.
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*
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*/
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#ifndef _DEVICE_PRINTK_H_
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#define _DEVICE_PRINTK_H_
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <linux/ratelimit.h>
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#ifndef dev_fmt
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#define dev_fmt(fmt) fmt
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#endif
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struct device;
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#define PRINTK_INFO_SUBSYSTEM_LEN 16
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#define PRINTK_INFO_DEVICE_LEN 48
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struct dev_printk_info {
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char subsystem[PRINTK_INFO_SUBSYSTEM_LEN];
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char device[PRINTK_INFO_DEVICE_LEN];
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};
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#ifdef CONFIG_PRINTK
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__printf(3, 0) __cold
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int dev_vprintk_emit(int level, const struct device *dev,
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const char *fmt, va_list args);
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__printf(3, 4) __cold
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int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...);
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__printf(3, 4) __cold
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void _dev_printk(const char *level, const struct device *dev,
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const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_emerg(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_alert(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_crit(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_err(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_warn(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_notice(const struct device *dev, const char *fmt, ...);
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__printf(2, 3) __cold
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void _dev_info(const struct device *dev, const char *fmt, ...);
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#else
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static inline __printf(3, 0)
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int dev_vprintk_emit(int level, const struct device *dev,
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const char *fmt, va_list args)
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{ return 0; }
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static inline __printf(3, 4)
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int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...)
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{ return 0; }
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static inline void __dev_printk(const char *level, const struct device *dev,
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struct va_format *vaf)
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{}
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static inline __printf(3, 4)
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void _dev_printk(const char *level, const struct device *dev,
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const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_emerg(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_crit(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_alert(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_err(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_warn(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_notice(const struct device *dev, const char *fmt, ...)
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{}
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static inline __printf(2, 3)
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void _dev_info(const struct device *dev, const char *fmt, ...)
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{}
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#endif
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/*
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* Need to take variadic arguments even though we don't use them, as dev_fmt()
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* may only just have been expanded and may result in multiple arguments.
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*/
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#define dev_printk_index_emit(level, fmt, ...) \
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printk_index_subsys_emit("%s %s: ", level, fmt)
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#define dev_printk_index_wrap(_p_func, level, dev, fmt, ...) \
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({ \
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dev_printk_index_emit(level, fmt); \
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_p_func(dev, fmt, ##__VA_ARGS__); \
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})
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/*
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* Some callsites directly call dev_printk rather than going through the
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* dev_<level> infrastructure, so we need to emit here as well as inside those
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* level-specific macros. Only one index entry will be produced, either way,
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* since dev_printk's `fmt` isn't known at compile time if going through the
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* dev_<level> macros.
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*
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* dev_fmt() isn't called for dev_printk when used directly, as it's used by
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* the dev_<level> macros internally which already have dev_fmt() processed.
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*
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* We also can't use dev_printk_index_wrap directly, because we have a separate
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* level to process.
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*/
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#define dev_printk(level, dev, fmt, ...) \
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({ \
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dev_printk_index_emit(level, fmt); \
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_dev_printk(level, dev, fmt, ##__VA_ARGS__); \
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})
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/*
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* #defines for all the dev_<level> macros to prefix with whatever
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* possible use of #define dev_fmt(fmt) ...
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*/
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#define dev_emerg(dev, fmt, ...) \
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dev_printk_index_wrap(_dev_emerg, KERN_EMERG, dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_crit(dev, fmt, ...) \
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dev_printk_index_wrap(_dev_crit, KERN_CRIT, dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_alert(dev, fmt, ...) \
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dev_printk_index_wrap(_dev_alert, KERN_ALERT, dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_err(dev, fmt, ...) \
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dev_printk_index_wrap(_dev_err, KERN_ERR, dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_warn(dev, fmt, ...) \
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dev_printk_index_wrap(_dev_warn, KERN_WARNING, dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_notice(dev, fmt, ...) \
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dev_printk_index_wrap(_dev_notice, KERN_NOTICE, dev, dev_fmt(fmt), ##__VA_ARGS__)
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#define dev_info(dev, fmt, ...) \
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dev_printk_index_wrap(_dev_info, KERN_INFO, dev, dev_fmt(fmt), ##__VA_ARGS__)
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#if defined(CONFIG_DYNAMIC_DEBUG) || \
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(defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
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#define dev_dbg(dev, fmt, ...) \
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dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
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#elif defined(DEBUG)
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#define dev_dbg(dev, fmt, ...) \
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dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
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#else
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#define dev_dbg(dev, fmt, ...) \
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({ \
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if (0) \
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dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
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})
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#endif
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#ifdef CONFIG_PRINTK
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#define dev_level_once(dev_level, dev, fmt, ...) \
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do { \
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static bool __print_once __read_mostly; \
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\
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if (!__print_once) { \
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__print_once = true; \
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dev_level(dev, fmt, ##__VA_ARGS__); \
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} \
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} while (0)
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#else
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#define dev_level_once(dev_level, dev, fmt, ...) \
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do { \
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if (0) \
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dev_level(dev, fmt, ##__VA_ARGS__); \
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} while (0)
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#endif
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#define dev_emerg_once(dev, fmt, ...) \
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dev_level_once(dev_emerg, dev, fmt, ##__VA_ARGS__)
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#define dev_alert_once(dev, fmt, ...) \
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dev_level_once(dev_alert, dev, fmt, ##__VA_ARGS__)
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#define dev_crit_once(dev, fmt, ...) \
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dev_level_once(dev_crit, dev, fmt, ##__VA_ARGS__)
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#define dev_err_once(dev, fmt, ...) \
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dev_level_once(dev_err, dev, fmt, ##__VA_ARGS__)
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#define dev_warn_once(dev, fmt, ...) \
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dev_level_once(dev_warn, dev, fmt, ##__VA_ARGS__)
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#define dev_notice_once(dev, fmt, ...) \
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dev_level_once(dev_notice, dev, fmt, ##__VA_ARGS__)
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#define dev_info_once(dev, fmt, ...) \
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dev_level_once(dev_info, dev, fmt, ##__VA_ARGS__)
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#define dev_dbg_once(dev, fmt, ...) \
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dev_level_once(dev_dbg, dev, fmt, ##__VA_ARGS__)
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#define dev_level_ratelimited(dev_level, dev, fmt, ...) \
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do { \
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static DEFINE_RATELIMIT_STATE(_rs, \
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DEFAULT_RATELIMIT_INTERVAL, \
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DEFAULT_RATELIMIT_BURST); \
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if (__ratelimit(&_rs)) \
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dev_level(dev, fmt, ##__VA_ARGS__); \
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} while (0)
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#define dev_emerg_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_emerg, dev, fmt, ##__VA_ARGS__)
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#define dev_alert_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_alert, dev, fmt, ##__VA_ARGS__)
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#define dev_crit_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_crit, dev, fmt, ##__VA_ARGS__)
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#define dev_err_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_err, dev, fmt, ##__VA_ARGS__)
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#define dev_warn_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__)
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#define dev_notice_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_notice, dev, fmt, ##__VA_ARGS__)
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#define dev_info_ratelimited(dev, fmt, ...) \
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dev_level_ratelimited(dev_info, dev, fmt, ##__VA_ARGS__)
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#if defined(CONFIG_DYNAMIC_DEBUG) || \
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(defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
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/* descriptor check is first to prevent flooding with "callbacks suppressed" */
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#define dev_dbg_ratelimited(dev, fmt, ...) \
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do { \
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static DEFINE_RATELIMIT_STATE(_rs, \
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DEFAULT_RATELIMIT_INTERVAL, \
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DEFAULT_RATELIMIT_BURST); \
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DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
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if (DYNAMIC_DEBUG_BRANCH(descriptor) && \
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__ratelimit(&_rs)) \
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__dynamic_dev_dbg(&descriptor, dev, dev_fmt(fmt), \
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##__VA_ARGS__); \
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} while (0)
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#elif defined(DEBUG)
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#define dev_dbg_ratelimited(dev, fmt, ...) \
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do { \
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static DEFINE_RATELIMIT_STATE(_rs, \
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DEFAULT_RATELIMIT_INTERVAL, \
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DEFAULT_RATELIMIT_BURST); \
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if (__ratelimit(&_rs)) \
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dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
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} while (0)
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#else
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#define dev_dbg_ratelimited(dev, fmt, ...) \
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do { \
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if (0) \
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dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
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} while (0)
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#endif
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#ifdef VERBOSE_DEBUG
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#define dev_vdbg dev_dbg
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#else
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#define dev_vdbg(dev, fmt, ...) \
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({ \
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if (0) \
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dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
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})
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#endif
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/*
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* dev_WARN*() acts like dev_printk(), but with the key difference of
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* using WARN/WARN_ONCE to include file/line information and a backtrace.
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*/
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#define dev_WARN(dev, format, arg...) \
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WARN(1, "%s %s: " format, dev_driver_string(dev), dev_name(dev), ## arg)
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#define dev_WARN_ONCE(dev, condition, format, arg...) \
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WARN_ONCE(condition, "%s %s: " format, \
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dev_driver_string(dev), dev_name(dev), ## arg)
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#endif /* _DEVICE_PRINTK_H_ */
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