linux-kernel - [PATCH 7/8] firewire: core: record card index in tracepoinrts events derived from bus_reset_arrange

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Date: Thu, 13 Jun 2024 22:14:39 +0900
From: Takashi Sakamoto <o-takashi@...amocchi.jp>
To: linux1394-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 7/8] firewire: core: record card index in tracepoinrts events derived from bus_reset_arrange_template

The asynchronous transmission of phy packet is initiated on one of 1394
OHCI controller, however the existing tracepoints events has the lack of
data about it.

This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.

Signed-off-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
---
 drivers/firewire/core-card.c    |  6 +++---
 include/trace/events/firewire.h | 21 ++++++++++++---------
 2 files changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c
index 127d87e3a153..f8b99dd6cd82 100644
--- a/drivers/firewire/core-card.c
+++ b/drivers/firewire/core-card.c
@@ -222,14 +222,14 @@ 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);
+	trace_bus_reset_initiate(card->index, card->generation, short_reset);
 
 	return card->driver->update_phy_reg(card, reg, 0, bit);
 }
 
 void fw_schedule_bus_reset(struct fw_card *card, bool delayed, bool short_reset)
 {
-	trace_bus_reset_schedule(card->generation, short_reset);
+	trace_bus_reset_schedule(card->index, card->generation, short_reset);
 
 	/* We don't try hard to sort out requests of long vs. short resets. */
 	card->br_short = short_reset;
@@ -249,7 +249,7 @@ 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);
+		trace_bus_reset_postpone(card->index, card->generation, card->br_short);
 
 		if (!queue_delayed_work(fw_workqueue, &card->br_work, 2 * HZ))
 			fw_card_put(card);
diff --git a/include/trace/events/firewire.h b/include/trace/events/firewire.h
index e5524fc71880..e6485051f546 100644
--- a/include/trace/events/firewire.h
+++ b/include/trace/events/firewire.h
@@ -303,36 +303,39 @@ 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_PROTO(unsigned int card_index, unsigned int generation, bool short_reset),
+	TP_ARGS(card_index, generation, short_reset),
 	TP_STRUCT__entry(
+		__field(u8, card_index)
 		__field(u8, generation)
 		__field(bool, short_reset)
 	),
 	TP_fast_assign(
+		__entry->card_index = card_index;
 		__entry->generation = generation;
 		__entry->short_reset = short_reset;
 	),
 	TP_printk(
-		"generation=%u short_reset=%s",
+		"card_index=%u generation=%u short_reset=%s",
+		__entry->card_index,
 		__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)
+	TP_PROTO(unsigned int card_index, unsigned int generation, bool short_reset),
+	TP_ARGS(card_index, 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)
+	TP_PROTO(unsigned int card_index, unsigned int generation, bool short_reset),
+	TP_ARGS(card_index, 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)
+	TP_PROTO(unsigned int card_index, unsigned int generation, bool short_reset),
+	TP_ARGS(card_index, generation, short_reset)
 );
 
 TRACE_EVENT(bus_reset_handle,
-- 
2.43.0