Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-25 13:41:51 +00:00
Code Issues Packages Projects Releases Wiki Activity

firewire: core: add tracepoints events for initiating bus reset

Browse Source 
At a commit 673249124304 ("firewire: core: option to log bus reset
initiation"), some kernel log messages were added to trace initiation of
bus reset. The kernel log messages are really helpful, while nowadays it
is not preferable just for debugging purpose. For the purpose, Linux
kernel tracepoints is more preferable.

This commit adds some alternative tracepoints events.

Link: https://lore.kernel.org/r/20240501073238.72769-4-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto 2024-05-01 16:32:36 +09:00
parent 42374303b7
commit 08dd8602aa
2 changed files with 40 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/firewire/core-card.c
View File

@ -23,6 +23,7 @@
#include <asm/byteorder.h>
#include "core.h"
#include <trace/events/firewire.h>
#define define_fw_printk_level(func, kern_level) \
void func(const struct fw_card *card, const char *fmt, ...) \
@ -221,6 +222,8 @@ static int reset_bus(struct fw_card *card, bool short_reset)
int reg = short_reset ? 5 : 1;
int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET;
trace_bus_reset_initiate(card->generation, short_reset);
if (unlikely(fw_core_param_debug & FW_CORE_PARAM_DEBUG_BUSRESETS))
fw_notice(card, "initiating %s bus reset\n",
short_reset ? "short" : "long");
@ -230,6 +233,8 @@ static int reset_bus(struct fw_card *card, bool short_reset)
void fw_schedule_bus_reset(struct fw_card *card, bool delayed, bool short_reset)
{
trace_bus_reset_schedule(card->generation, short_reset);
if (unlikely(fw_core_param_debug & FW_CORE_PARAM_DEBUG_BUSRESETS))
fw_notice(card, "scheduling %s bus reset\n",
short_reset ? "short" : "long");
@ -252,6 +257,8 @@ static void br_work(struct work_struct *work)
/* Delay for 2s after last reset per IEEE 1394 clause 8.2.1. */
if (card->reset_jiffies != 0 &&
time_before64(get_jiffies_64(), card->reset_jiffies + 2 * HZ)) {
trace_bus_reset_postpone(card->generation, card->br_short);
if (unlikely(fw_core_param_debug & FW_CORE_PARAM_DEBUG_BUSRESETS))
fw_notice(card, "delaying bus reset\n");
if (!queue_delayed_work(fw_workqueue, &card->br_work, 2 * HZ))

33
include/trace/events/firewire.h
View File

@ -284,6 +284,39 @@ TRACE_EVENT(async_phy_inbound,
)
);
DECLARE_EVENT_CLASS(bus_reset_arrange_template,
TP_PROTO(unsigned int generation, bool short_reset),
TP_ARGS(generation, short_reset),
TP_STRUCT__entry(
__field(u8, generation)
__field(bool, short_reset)
),
TP_fast_assign(
__entry->generation = generation;
__entry->short_reset = short_reset;
),
TP_printk(
"generation=%u short_reset=%s",
__entry->generation,
__entry->short_reset ? "true" : "false"
)
);
DEFINE_EVENT(bus_reset_arrange_template, bus_reset_initiate,
TP_PROTO(unsigned int generation, bool short_reset),
TP_ARGS(generation, short_reset)
);
DEFINE_EVENT(bus_reset_arrange_template, bus_reset_schedule,
TP_PROTO(unsigned int generation, bool short_reset),
TP_ARGS(generation, short_reset)
);
DEFINE_EVENT(bus_reset_arrange_template, bus_reset_postpone,
TP_PROTO(unsigned int generation, bool short_reset),
TP_ARGS(generation, short_reset)
);
#endif // _FIREWIRE_TRACE_EVENT_H
#include <trace/define_trace.h>