mirror of https://gitee.com/openkylin/linux.git
431 lines
12 KiB
C
431 lines
12 KiB
C
/*
|
|
* Copyright (C) 2016 Red Hat
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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 <robdclark@gmail.com>
|
|
*/
|
|
|
|
#ifndef DRM_PRINT_H_
|
|
#define DRM_PRINT_H_
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/printk.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/device.h>
|
|
#include <linux/debugfs.h>
|
|
|
|
#include <drm/drm.h>
|
|
|
|
/**
|
|
* 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_ */
|