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authorDmitry Rokosov <DDRokosov@sberdevices.ru>2022-08-16 21:14:48 +0300
committerMark Brown <broonie@kernel.org>2022-08-23 15:04:55 +0300
commit026c99b508f060d3c85fda06b21e010683ef5590 (patch)
treebad519c63088951cfee0beaf09630239330f6274 /drivers/base
parentf8f60615379c1b36d9220f3886fb9b229e95d8cd (diff)
downloadlinux-026c99b508f060d3c85fda06b21e010683ef5590.tar.xz
regmap: introduce value tracing for regmap bulk operations
Currently, only one-register io operations support tracepoints with value logging. For the regmap bulk operations developer can view hw_start/hw_done tracepoints with starting reg number and registers count to be reading or writing. This patch injects tracepoints with dumping registers values in the hex format to regmap bulk reading and writing. Signed-off-by: Dmitry Rokosov <ddrokosov@sberdevices.ru> Link: https://lore.kernel.org/r/20220816181451.5628-1-ddrokosov@sberdevices.ru Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/regmap/regmap.c7
-rw-r--r--drivers/base/regmap/trace.h43
2 files changed, 50 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 41ff9f18b6a3..63d9c6ab237e 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2448,6 +2448,10 @@ out:
kfree(wval);
}
+
+ if (!ret)
+ trace_regmap_bulk_write(map, reg, val, val_bytes * val_count);
+
return ret;
}
EXPORT_SYMBOL_GPL(regmap_bulk_write);
@@ -3209,6 +3213,9 @@ out:
map->unlock(map->lock_arg);
}
+ if (!ret)
+ trace_regmap_bulk_read(map, reg, val, val_bytes * val_count);
+
return ret;
}
EXPORT_SYMBOL_GPL(regmap_bulk_read);
diff --git a/drivers/base/regmap/trace.h b/drivers/base/regmap/trace.h
index 9abee14df9ee..04329ba68ec5 100644
--- a/drivers/base/regmap/trace.h
+++ b/drivers/base/regmap/trace.h
@@ -64,6 +64,49 @@ DEFINE_EVENT(regmap_reg, regmap_reg_read_cache,
);
+DECLARE_EVENT_CLASS(regmap_bulk,
+
+ TP_PROTO(struct regmap *map, unsigned int reg,
+ const void *val, int val_len),
+
+ TP_ARGS(map, reg, val, val_len),
+
+ TP_STRUCT__entry(
+ __string(name, regmap_name(map))
+ __field(unsigned int, reg)
+ __dynamic_array(char, buf, val_len)
+ __field(int, val_len)
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, regmap_name(map));
+ __entry->reg = reg;
+ __entry->val_len = val_len;
+ if (val)
+ memcpy(__get_dynamic_array(buf), val, val_len);
+ ),
+
+ TP_printk("%s reg=%x val=%s", __get_str(name),
+ (unsigned int)__entry->reg,
+ __print_hex(__get_dynamic_array(buf), __entry->val_len))
+);
+
+DEFINE_EVENT(regmap_bulk, regmap_bulk_write,
+
+ TP_PROTO(struct regmap *map, unsigned int reg,
+ const void *val, int val_len),
+
+ TP_ARGS(map, reg, val, val_len)
+);
+
+DEFINE_EVENT(regmap_bulk, regmap_bulk_read,
+
+ TP_PROTO(struct regmap *map, unsigned int reg,
+ const void *val, int val_len),
+
+ TP_ARGS(map, reg, val, val_len)
+);
+
DECLARE_EVENT_CLASS(regmap_block,
TP_PROTO(struct regmap *map, unsigned int reg, int count),