ath6kl: add tracing support to debug message macros

Now all log messages are sent through the tracing infrastruture as well.
Tracing point doesn't follow debug_mask module parameter, instead it sends
all debug messages, so once you enable ath6kl_log_dbg tracing point you will
get a lot of messages. Needs to be discussed if this is sensible or not.
The overhead should be small enough and we anyway include debug level as
well so it's easy to filter in user space.

I wasn't really sure what to do with ath6kl_dbg_dump() and for now decided
that it also sends the buffer to user space. But most likely in the future
ath6kl_dbg_dump() should go away in favor of using proper tracing points, but
we will see.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath6kl/debug.c b/drivers/net/wireless/ath/ath6kl/debug.c
index 80f23e398acd91134ce3f149b82255b93f639a44..42a887d06ba275df157590d33aee47c4f951f621 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/debug.c
+++ b/drivers/net/wireless/ath/ath6kl/debug.c
@@ -117,15 +117,15 @@ void ath6kl_dbg(enum ATH6K_DEBUG_MASK mask, const char *fmt, ...)
        struct va_format vaf;
        va_list args;
 
-       if (!(debug_mask & mask))
-               return;
-
        va_start(args, fmt);
 
        vaf.fmt = fmt;
        vaf.va = &args;
 
-       ath6kl_printk(KERN_DEBUG, "%pV", &vaf);
+       if (debug_mask & mask)
+               ath6kl_printk(KERN_DEBUG, "%pV", &vaf);
+
+       trace_ath6kl_log_dbg(mask, &vaf);
 
        va_end(args);
 }
@@ -141,6 +141,10 @@ void ath6kl_dbg_dump(enum ATH6K_DEBUG_MASK mask,
 
                print_hex_dump_bytes(prefix, DUMP_PREFIX_OFFSET, buf, len);
        }
+
+       /* tracing code doesn't like null strings :/ */
+       trace_ath6kl_log_dbg_dump(msg ? msg : "", prefix ? prefix : "",
+                                 buf, len);
 }
 EXPORT_SYMBOL(ath6kl_dbg_dump);
 

diff --git a/drivers/net/wireless/ath/ath6kl/trace.h b/drivers/net/wireless/ath/ath6kl/trace.h
index ea55b2abbdb3ba6c4d97d84ef24e27277a8af077..6af6fa0383122db02f42b1ae8882e09fb2d6d48b 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/trace.h
+++ b/drivers/net/wireless/ath/ath6kl/trace.h
@@ -278,6 +278,48 @@ DEFINE_EVENT(ath6kl_log_event, ath6kl_log_info,
             TP_ARGS(vaf)
 );
 
+TRACE_EVENT(ath6kl_log_dbg,
+       TP_PROTO(unsigned int level, struct va_format *vaf),
+       TP_ARGS(level, vaf),
+       TP_STRUCT__entry(
+               __field(unsigned int, level)
+               __dynamic_array(char, msg, ATH6KL_MSG_MAX)
+       ),
+       TP_fast_assign(
+               __entry->level = level;
+               WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg),
+                                      ATH6KL_MSG_MAX,
+                                      vaf->fmt,
+                                      *vaf->va) >= ATH6KL_MSG_MAX);
+       ),
+       TP_printk("%s", __get_str(msg))
+);
+
+TRACE_EVENT(ath6kl_log_dbg_dump,
+       TP_PROTO(const char *msg, const char *prefix,
+                const void *buf, size_t buf_len),
+
+       TP_ARGS(msg, prefix, buf, buf_len),
+
+       TP_STRUCT__entry(
+               __string(msg, msg)
+               __string(prefix, prefix)
+               __field(size_t, buf_len)
+               __dynamic_array(u8, buf, buf_len)
+       ),
+
+       TP_fast_assign(
+               __assign_str(msg, msg);
+               __assign_str(prefix, prefix);
+               __entry->buf_len = buf_len;
+               memcpy(__get_dynamic_array(buf), buf, buf_len);
+       ),
+
+       TP_printk(
+               "%s/%s\n", __get_str(prefix), __get_str(msg)
+       )
+);
+
 #endif /* _ ATH6KL_TRACE_H || TRACE_HEADER_MULTI_READ*/
 
 /* we don't want to use include/trace/events */