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IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: * Rob Clark */ #ifndef DRM_PRINT_H_ #define DRM_PRINT_H_ #include #include #include #include #include #include /** * DOC: print * * A simple wrapper for dev_printk(), seq_printf(), etc. Allows same * debug code to be used for both debugfs and printk logging. * * For example:: * * void log_some_info(struct drm_printer *p) * { * drm_printf(p, "foo=%d\n", foo); * drm_printf(p, "bar=%d\n", bar); * } * * #ifdef CONFIG_DEBUG_FS * void debugfs_show(struct seq_file *f) * { * struct drm_printer p = drm_seq_file_printer(f); * log_some_info(&p); * } * #endif * * void some_other_function(...) * { * struct drm_printer p = drm_info_printer(drm->dev); * log_some_info(&p); * } */ /** * struct drm_printer - drm output "stream" * * Do not use struct members directly. Use drm_printer_seq_file(), * drm_printer_info(), etc to initialize. And drm_printf() for output. */ struct drm_printer { /* private: */ void (*printfn)(struct drm_printer *p, struct va_format *vaf); void (*puts)(struct drm_printer *p, const char *str); void *arg; const char *prefix; }; void __drm_printfn_coredump(struct drm_printer *p, struct va_format *vaf); void __drm_puts_coredump(struct drm_printer *p, const char *str); void __drm_printfn_seq_file(struct drm_printer *p, struct va_format *vaf); void __drm_puts_seq_file(struct drm_printer *p, const char *str); void __drm_printfn_info(struct drm_printer *p, struct va_format *vaf); void __drm_printfn_debug(struct drm_printer *p, struct va_format *vaf); __printf(2, 3) void drm_printf(struct drm_printer *p, const char *f, ...); void drm_puts(struct drm_printer *p, const char *str); void drm_print_regset32(struct drm_printer *p, struct debugfs_regset32 *regset); __printf(2, 0) /** * drm_vprintf - print to a &drm_printer stream * @p: the &drm_printer * @fmt: format string * @va: the va_list */ static inline void drm_vprintf(struct drm_printer *p, const char *fmt, va_list *va) { struct va_format vaf = { .fmt = fmt, .va = va }; p->printfn(p, &vaf); } /** * drm_printf_indent - Print to a &drm_printer stream with indentation * @printer: DRM printer * @indent: Tab indentation level (max 5) * @fmt: Format string */ #define drm_printf_indent(printer, indent, fmt, ...) \ drm_printf((printer), "%.*s" fmt, (indent), "\t\t\t\t\tX", ##__VA_ARGS__) /** * struct drm_print_iterator - local struct used with drm_printer_coredump * @data: Pointer to the devcoredump output buffer * @start: The offset within the buffer to start writing * @remain: The number of bytes to write for this iteration */ struct drm_print_iterator { void *data; ssize_t start; ssize_t remain; /* private: */ ssize_t offset; }; /** * drm_coredump_printer - construct a &drm_printer that can output to a buffer * from the read function for devcoredump * @iter: A pointer to a struct drm_print_iterator for the read instance * * This wrapper extends drm_printf() to work with a dev_coredumpm() callback * function. The passed in drm_print_iterator struct contains the buffer * pointer, size and offset as passed in from devcoredump. * * For example:: * * void coredump_read(char *buffer, loff_t offset, size_t count, * void *data, size_t datalen) * { * struct drm_print_iterator iter; * struct drm_printer p; * * iter.data = buffer; * iter.start = offset; * iter.remain = count; * * p = drm_coredump_printer(&iter); * * drm_printf(p, "foo=%d\n", foo); * } * * void makecoredump(...) * { * ... * dev_coredumpm(dev, THIS_MODULE, data, 0, GFP_KERNEL, * coredump_read, ...) * } * * RETURNS: * The &drm_printer object */ static inline struct drm_printer drm_coredump_printer(struct drm_print_iterator *iter) { struct drm_printer p = { .printfn = __drm_printfn_coredump, .puts = __drm_puts_coredump, .arg = iter, }; /* Set the internal offset of the iterator to zero */ iter->offset = 0; return p; } /** * drm_seq_file_printer - construct a &drm_printer that outputs to &seq_file * @f: the &struct seq_file to output to * * RETURNS: * The &drm_printer object */ static inline struct drm_printer drm_seq_file_printer(struct seq_file *f) { struct drm_printer p = { .printfn = __drm_printfn_seq_file, .puts = __drm_puts_seq_file, .arg = f, }; return p; } /** * drm_info_printer - construct a &drm_printer that outputs to dev_printk() * @dev: the &struct device pointer * * RETURNS: * The &drm_printer object */ static inline struct drm_printer drm_info_printer(struct device *dev) { struct drm_printer p = { .printfn = __drm_printfn_info, .arg = dev, }; return p; } /** * drm_debug_printer - construct a &drm_printer that outputs to pr_debug() * @prefix: debug output prefix * * RETURNS: * The &drm_printer object */ static inline struct drm_printer drm_debug_printer(const char *prefix) { struct drm_printer p = { .printfn = __drm_printfn_debug, .prefix = prefix }; return p; } /* * The following categories are defined: * * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ... * This is the category used by the DRM_DEBUG() macro. * * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ... * This is the category used by the DRM_DEBUG_DRIVER() macro. * * KMS: used in the modesetting code. * This is the category used by the DRM_DEBUG_KMS() macro. * * PRIME: used in the prime code. * This is the category used by the DRM_DEBUG_PRIME() macro. * * ATOMIC: used in the atomic code. * This is the category used by the DRM_DEBUG_ATOMIC() macro. * * VBL: used for verbose debug message in the vblank code * This is the category used by the DRM_DEBUG_VBL() macro. * * Enabling verbose debug messages is done through the drm.debug parameter, * each category being enabled by a bit. * * drm.debug=0x1 will enable CORE messages * drm.debug=0x2 will enable DRIVER messages * drm.debug=0x3 will enable CORE and DRIVER messages * ... * drm.debug=0x3f will enable all messages * * An interesting feature is that it's possible to enable verbose logging at * run-time by echoing the debug value in its sysfs node: * # echo 0xf > /sys/module/drm/parameters/debug */ #define DRM_UT_NONE 0x00 #define DRM_UT_CORE 0x01 #define DRM_UT_DRIVER 0x02 #define DRM_UT_KMS 0x04 #define DRM_UT_PRIME 0x08 #define DRM_UT_ATOMIC 0x10 #define DRM_UT_VBL 0x20 #define DRM_UT_STATE 0x40 #define DRM_UT_LEASE 0x80 #define DRM_UT_DP 0x100 __printf(3, 4) void drm_dev_printk(const struct device *dev, const char *level, const char *format, ...); __printf(3, 4) void drm_dev_dbg(const struct device *dev, unsigned int category, const char *format, ...); __printf(2, 3) void drm_dbg(unsigned int category, const char *format, ...); __printf(1, 2) void drm_err(const char *format, ...); /* Macros to make printk easier */ #define _DRM_PRINTK(once, level, fmt, ...) \ printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__) #define DRM_INFO(fmt, ...) \ _DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__) #define DRM_NOTE(fmt, ...) \ _DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__) #define DRM_WARN(fmt, ...) \ _DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__) #define DRM_INFO_ONCE(fmt, ...) \ _DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__) #define DRM_NOTE_ONCE(fmt, ...) \ _DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__) #define DRM_WARN_ONCE(fmt, ...) \ _DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__) /** * Error output. * * @dev: device pointer * @fmt: printf() like format string. */ #define DRM_DEV_ERROR(dev, fmt, ...) \ drm_dev_printk(dev, KERN_ERR, "*ERROR* " fmt, ##__VA_ARGS__) #define DRM_ERROR(fmt, ...) \ drm_err(fmt, ##__VA_ARGS__) /** * Rate limited error output. Like DRM_ERROR() but won't flood the log. * * @dev: device pointer * @fmt: printf() like format string. */ #define DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...) \ ({ \ static DEFINE_RATELIMIT_STATE(_rs, \ DEFAULT_RATELIMIT_INTERVAL, \ DEFAULT_RATELIMIT_BURST); \ \ if (__ratelimit(&_rs)) \ DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__); \ }) #define DRM_ERROR_RATELIMITED(fmt, ...) \ DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__) #define DRM_DEV_INFO(dev, fmt, ...) \ drm_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__) #define DRM_DEV_INFO_ONCE(dev, fmt, ...) \ ({ \ static bool __print_once __read_mostly; \ if (!__print_once) { \ __print_once = true; \ DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__); \ } \ }) /** * Debug output. * * @dev: device pointer * @fmt: printf() like format string. */ #define DRM_DEV_DEBUG(dev, fmt, ...) \ drm_dev_dbg(dev, DRM_UT_CORE, fmt, ##__VA_ARGS__) #define DRM_DEBUG(fmt, ...) \ drm_dbg(DRM_UT_CORE, fmt, ##__VA_ARGS__) #define DRM_DEV_DEBUG_DRIVER(dev, fmt, ...) \ drm_dev_dbg(dev, DRM_UT_DRIVER, fmt, ##__VA_ARGS__) #define DRM_DEBUG_DRIVER(fmt, ...) \ drm_dbg(DRM_UT_DRIVER, fmt, ##__VA_ARGS__) #define DRM_DEV_DEBUG_KMS(dev, fmt, ...) \ drm_dev_dbg(dev, DRM_UT_KMS, fmt, ##__VA_ARGS__) #define DRM_DEBUG_KMS(fmt, ...) \ drm_dbg(DRM_UT_KMS, fmt, ##__VA_ARGS__) #define DRM_DEV_DEBUG_PRIME(dev, fmt, ...) \ drm_dev_dbg(dev, DRM_UT_PRIME, fmt, ##__VA_ARGS__) #define DRM_DEBUG_PRIME(fmt, ...) \ drm_dbg(DRM_UT_PRIME, fmt, ##__VA_ARGS__) #define DRM_DEV_DEBUG_ATOMIC(dev, fmt, ...) \ drm_dev_dbg(dev, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__) #define DRM_DEBUG_ATOMIC(fmt, ...) \ drm_dbg(DRM_UT_ATOMIC, fmt, ##__VA_ARGS__) #define DRM_DEV_DEBUG_VBL(dev, fmt, ...) \ drm_dev_dbg(dev, DRM_UT_VBL, fmt, ##__VA_ARGS__) #define DRM_DEBUG_VBL(fmt, ...) \ drm_dbg(DRM_UT_VBL, fmt, ##__VA_ARGS__) #define DRM_DEBUG_LEASE(fmt, ...) \ drm_dbg(DRM_UT_LEASE, fmt, ##__VA_ARGS__) #define DRM_DEV_DEBUG_DP(dev, fmt, ...) \ drm_dev_dbg(dev, DRM_UT_DP, fmt, ## __VA_ARGS__) #define DRM_DEBUG_DP(fmt, ...) \ drm_dbg(DRM_UT_DP, fmt, ## __VA_ARGS__) #define _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, category, fmt, ...) \ ({ \ static DEFINE_RATELIMIT_STATE(_rs, \ DEFAULT_RATELIMIT_INTERVAL, \ DEFAULT_RATELIMIT_BURST); \ if (__ratelimit(&_rs)) \ drm_dev_dbg(dev, category, fmt, ##__VA_ARGS__); \ }) /** * Rate limited debug output. Like DRM_DEBUG() but won't flood the log. * * @dev: device pointer * @fmt: printf() like format string. */ #define DRM_DEV_DEBUG_RATELIMITED(dev, fmt, ...) \ _DEV_DRM_DEFINE_DEBUG_RATELIMITED(dev, DRM_UT_CORE, \ fmt, ##__VA_ARGS__) #define DRM_DEBUG_RATELIMITED(fmt, ...) \ DRM_DEV_DEBUG_RATELIMITED(NULL, fmt, ##__VA_ARGS__) #define DRM_DEV_DEBUG_DRIVER_RATELIMITED(dev, fmt, ...) \ _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, DRM_UT_DRIVER, \ fmt, ##__VA_ARGS__) #define DRM_DEBUG_DRIVER_RATELIMITED(fmt, ...) \ DRM_DEV_DEBUG_DRIVER_RATELIMITED(NULL, fmt, ##__VA_ARGS__) #define DRM_DEV_DEBUG_KMS_RATELIMITED(dev, fmt, ...) \ _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, DRM_UT_KMS, \ fmt, ##__VA_ARGS__) #define DRM_DEBUG_KMS_RATELIMITED(fmt, ...) \ DRM_DEV_DEBUG_KMS_RATELIMITED(NULL, fmt, ##__VA_ARGS__) #define DRM_DEV_DEBUG_PRIME_RATELIMITED(dev, fmt, ...) \ _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, DRM_UT_PRIME, \ fmt, ##__VA_ARGS__) #define DRM_DEBUG_PRIME_RATELIMITED(fmt, ...) \ DRM_DEV_DEBUG_PRIME_RATELIMITED(NULL, fmt, ##__VA_ARGS__) #endif /* DRM_PRINT_H_ */