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drm_print: add _ddebug descriptor to drm_*dbg prototypes

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upgrade the callchain to drm_dbg() and drm_dev_dbg(); add a struct
_ddebug ptr parameter to them, and supply that additional param by
replacing the '_no_desc' flavor of dyndbg Factory macro currently used
with the flavor that supplies the descriptor.

NOTES:

The descriptor gives these fns access to the decorator flags, but they
do none of the dynamic-prefixing done by dynamic_emit_prefix(), which
is currently static.

DRM already has conventions for logging/messaging; just tossing
optional decorations on top probably wouldn't help.  Instead, existing
flags (or new ones, perhaps 'sd' ala lspci) can be used to make
current message conventions optional.  This suggests a new
drmdbg_prefix_emit() to handle prefixing locally.

For CONFIG_DRM_USE_DYNAMIC_DEBUG=N, just pass null descriptor.

desc->class_id is redundant with category parameter, but its
availability is dependent on desc.

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Link: https://lore.kernel.org/r/20220912052852.1123868-10-jim.cromie@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jim Cromie 2022-09-11 23:28:52 -06:00 committed by Greg Kroah-Hartman
parent ccc2b49632
commit 16deeb8e18
2 changed files with 17 additions and 14 deletions
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8
drivers/gpu/drm/drm_print.c
View file

@ -29,6 +29,7 @@
#include <linux/moduleparam.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/dynamic_debug.h>
#include <drm/drm.h>
#include <drm/drm_drv.h>
@ -278,8 +279,8 @@ void drm_dev_printk(const struct device *dev, const char *level,
}
EXPORT_SYMBOL(drm_dev_printk);
void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
const char *format, ...)
void __drm_dev_dbg(struct _ddebug *desc, const struct device *dev,
enum drm_debug_category category, const char *format, ...)
{
struct va_format vaf;
va_list args;
@ -287,6 +288,7 @@ void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
if (!__drm_debug_enabled(category))
return;
/* we know we are printing for either syslog, tracefs, or both */
va_start(args, format);
vaf.fmt = format;
vaf.va = &args;
@ -302,7 +304,7 @@ void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
}
EXPORT_SYMBOL(__drm_dev_dbg);
void ___drm_dbg(enum drm_debug_category category, const char *format, ...)
void ___drm_dbg(struct _ddebug *desc, enum drm_debug_category category, const char *format, ...)
{
struct va_format vaf;
va_list args;

23
include/drm/drm_print.h
View file

@ -354,9 +354,10 @@ static inline bool drm_debug_enabled_raw(enum drm_debug_category category)
__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, enum drm_debug_category category,
const char *format, ...);
struct _ddebug;
__printf(4, 5)
void __drm_dev_dbg(struct _ddebug *desc, const struct device *dev,
enum drm_debug_category category, const char *format, ...);
/**
* DRM_DEV_ERROR() - Error output.
@ -406,11 +407,11 @@ void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
#if !defined(CONFIG_DRM_USE_DYNAMIC_DEBUG)
#define drm_dev_dbg(dev, cat, fmt, ...) \
__drm_dev_dbg(dev, cat, fmt, ##__VA_ARGS__)
__drm_dev_dbg(NULL, dev, cat, fmt, ##__VA_ARGS__)
#else
#define drm_dev_dbg(dev, cat, fmt, ...) \
_dynamic_func_call_no_desc(fmt, __drm_dev_dbg, \
dev, cat, fmt, ##__VA_ARGS__)
_dynamic_func_call_cls(cat, fmt, __drm_dev_dbg, \
dev, cat, fmt, ##__VA_ARGS__)
#endif
/**
@ -514,17 +515,17 @@ void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
* Prefer drm_device based logging over device or prink based logging.
*/
__printf(2, 3)
void ___drm_dbg(enum drm_debug_category category, const char *format, ...);
__printf(3, 4)
void ___drm_dbg(struct _ddebug *desc, enum drm_debug_category category, const char *format, ...);
__printf(1, 2)
void __drm_err(const char *format, ...);
#if !defined(CONFIG_DRM_USE_DYNAMIC_DEBUG)
#define __drm_dbg(fmt, ...) ___drm_dbg(fmt, ##__VA_ARGS__)
#define __drm_dbg(fmt, ...) ___drm_dbg(NULL, fmt, ##__VA_ARGS__)
#else
#define __drm_dbg(cat, fmt, ...) \
_dynamic_func_call_no_desc(fmt, ___drm_dbg, \
cat, fmt, ##__VA_ARGS__)
_dynamic_func_call_cls(cat, fmt, ___drm_dbg, \
cat, fmt, ##__VA_ARGS__)
#endif
/* Macros to make printk easier */