diff --git a/drivers/firewire/.kunitconfig b/drivers/firewire/.kunitconfig
index 76444a2d5e12..60d9e7c35417 100644
--- a/drivers/firewire/.kunitconfig
+++ b/drivers/firewire/.kunitconfig
@@ -3,3 +3,4 @@ CONFIG_PCI=y
 CONFIG_FIREWIRE=y
 CONFIG_FIREWIRE_KUNIT_UAPI_TEST=y
 CONFIG_FIREWIRE_KUNIT_DEVICE_ATTRIBUTE_TEST=y
+CONFIG_FIREWIRE_KUNIT_PACKET_SERDES_TEST=y
diff --git a/drivers/firewire/Kconfig b/drivers/firewire/Kconfig
index 552a39df8cbd..869598b20e3a 100644
--- a/drivers/firewire/Kconfig
+++ b/drivers/firewire/Kconfig
@@ -50,6 +50,22 @@ config FIREWIRE_KUNIT_DEVICE_ATTRIBUTE_TEST
 	  For more information on KUnit and unit tests in general, refer
 	  to the KUnit documentation in Documentation/dev-tools/kunit/.
 
+config FIREWIRE_KUNIT_PACKET_SERDES_TEST
+	tristate "KUnit tests for packet serialization/deserialization" if !KUNIT_ALL_TESTS
+	depends on FIREWIRE && KUNIT
+	default KUNIT_ALL_TESTS
+	help
+	  This builds the KUnit tests for packet serialization and
+	  deserialization.
+
+	  KUnit tests run during boot and output the results to the debug
+	  log in TAP format (https://testanything.org/). Only useful for
+	  kernel devs running KUnit test harness and are not for inclusion
+	  into a production build.
+
+	  For more information on KUnit and unit tests in general, refer
+	  to the KUnit documentation in Documentation/dev-tools/kunit/.
+
 config FIREWIRE_OHCI
 	tristate "OHCI-1394 controllers"
 	depends on PCI && FIREWIRE && MMU
diff --git a/drivers/firewire/Makefile b/drivers/firewire/Makefile
index b24b2879ac34..75c47d046925 100644
--- a/drivers/firewire/Makefile
+++ b/drivers/firewire/Makefile
@@ -3,7 +3,7 @@
 # Makefile for the Linux IEEE 1394 implementation
 #
 
-firewire-core-y += core-card.o core-cdev.o core-device.o \
+firewire-core-y += core-trace.o core-card.o core-cdev.o core-device.o \
                    core-iso.o core-topology.o core-transaction.o
 firewire-ohci-y += ohci.o
 firewire-sbp2-y += sbp2.o
@@ -16,5 +16,5 @@ obj-$(CONFIG_FIREWIRE_NET)  += firewire-net.o
 obj-$(CONFIG_FIREWIRE_NOSY) += nosy.o
 obj-$(CONFIG_PROVIDE_OHCI1394_DMA_INIT) += init_ohci1394_dma.o
 
-firewire-uapi-test-objs += uapi-test.o
-obj-$(CONFIG_FIREWIRE_KUNIT_UAPI_TEST) += firewire-uapi-test.o
+obj-$(CONFIG_FIREWIRE_KUNIT_UAPI_TEST) += uapi-test.o
+obj-$(CONFIG_FIREWIRE_KUNIT_PACKET_SERDES_TEST) += packet-serdes-test.o
diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c
index 401a77e3b5fa..127d87e3a153 100644
--- a/drivers/firewire/core-card.c
+++ b/drivers/firewire/core-card.c
@@ -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, ...)	\
@@ -221,11 +222,15 @@ 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);
+
 	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);
+
 	/* We don't try hard to sort out requests of long vs. short resets. */
 	card->br_short = short_reset;
 
@@ -244,6 +249,8 @@ 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 (!queue_delayed_work(fw_workqueue, &card->br_work, 2 * HZ))
 			fw_card_put(card);
 		return;
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
index 6274b86eb943..55993c9e0b90 100644
--- a/drivers/firewire/core-cdev.c
+++ b/drivers/firewire/core-cdev.c
@@ -35,6 +35,7 @@
 
 
 #include "core.h"
+#include <trace/events/firewire.h>
 
 /*
  * ABI version history is documented in linux/firewire-cdev.h.
@@ -1558,6 +1559,9 @@ static void outbound_phy_packet_callback(struct fw_packet *packet,
 	struct client *e_client = e->client;
 	u32 rcode;
 
+	trace_async_phy_outbound_complete((uintptr_t)packet, status, packet->generation,
+					  packet->timestamp);
+
 	switch (status) {
 	// expected:
 	case ACK_COMPLETE:
@@ -1655,6 +1659,9 @@ static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
 		memcpy(pp->data, a->data, sizeof(a->data));
 	}
 
+	trace_async_phy_outbound_initiate((uintptr_t)&e->p, e->p.generation, e->p.header[1],
+					  e->p.header[2]);
+
 	card->driver->send_request(card, &e->p);
 
 	return 0;
diff --git a/drivers/firewire/core-topology.c b/drivers/firewire/core-topology.c
index f40c81534381..837cc44d8d9f 100644
--- a/drivers/firewire/core-topology.c
+++ b/drivers/firewire/core-topology.c
@@ -20,6 +20,7 @@
 #include <asm/byteorder.h>
 
 #include "core.h"
+#include <trace/events/firewire.h>
 
 #define SELF_ID_PHY_ID(q)		(((q) >> 24) & 0x3f)
 #define SELF_ID_EXTENDED(q)		(((q) >> 23) & 0x01)
@@ -507,6 +508,8 @@ void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation,
 	struct fw_node *local_node;
 	unsigned long flags;
 
+	trace_bus_reset_handle(generation, node_id, bm_abdicate, self_ids, self_id_count);
+
 	spin_lock_irqsave(&card->lock, flags);
 
 	/*
diff --git a/drivers/firewire/core-trace.c b/drivers/firewire/core-trace.c
new file mode 100644
index 000000000000..96cbd9d384dc
--- /dev/null
+++ b/drivers/firewire/core-trace.c
@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Takashi Sakamoto
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/firewire.h>
diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index 130b95aca629..571fdff65c2b 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -29,29 +29,11 @@
 #include <asm/byteorder.h>
 
 #include "core.h"
+#include <trace/events/firewire.h>
+#include "packet-header-definitions.h"
 
-#define HEADER_PRI(pri)			((pri) << 0)
-#define HEADER_TCODE(tcode)		((tcode) << 4)
-#define HEADER_RETRY(retry)		((retry) << 8)
-#define HEADER_TLABEL(tlabel)		((tlabel) << 10)
-#define HEADER_DESTINATION(destination)	((destination) << 16)
-#define HEADER_SOURCE(source)		((source) << 16)
-#define HEADER_RCODE(rcode)		((rcode) << 12)
-#define HEADER_OFFSET_HIGH(offset_high)	((offset_high) << 0)
-#define HEADER_DATA_LENGTH(length)	((length) << 16)
-#define HEADER_EXTENDED_TCODE(tcode)	((tcode) << 0)
-
-#define HEADER_GET_TCODE(q)		(((q) >> 4) & 0x0f)
-#define HEADER_GET_TLABEL(q)		(((q) >> 10) & 0x3f)
-#define HEADER_GET_RCODE(q)		(((q) >> 12) & 0x0f)
-#define HEADER_GET_DESTINATION(q)	(((q) >> 16) & 0xffff)
-#define HEADER_GET_SOURCE(q)		(((q) >> 16) & 0xffff)
-#define HEADER_GET_OFFSET_HIGH(q)	(((q) >> 0) & 0xffff)
-#define HEADER_GET_DATA_LENGTH(q)	(((q) >> 16) & 0xffff)
-#define HEADER_GET_EXTENDED_TCODE(q)	(((q) >> 0) & 0xffff)
-
-#define HEADER_DESTINATION_IS_BROADCAST(q) \
-	(((q) & HEADER_DESTINATION(0x3f)) == HEADER_DESTINATION(0x3f))
+#define HEADER_DESTINATION_IS_BROADCAST(header) \
+	((async_header_get_destination(header) & 0x3f) == 0x3f)
 
 #define PHY_PACKET_CONFIG	0x0
 #define PHY_PACKET_LINK_ON	0x1
@@ -192,6 +174,9 @@ static void transmit_complete_callback(struct fw_packet *packet,
 	struct fw_transaction *t =
 	    container_of(packet, struct fw_transaction, packet);
 
+	trace_async_request_outbound_complete((uintptr_t)t, packet->generation, packet->speed,
+					      status, packet->timestamp);
+
 	switch (status) {
 	case ACK_COMPLETE:
 		close_transaction(t, card, RCODE_COMPLETE, packet->timestamp);
@@ -231,10 +216,11 @@ static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
 	int ext_tcode;
 
 	if (tcode == TCODE_STREAM_DATA) {
-		packet->header[0] =
-			HEADER_DATA_LENGTH(length) |
-			destination_id |
-			HEADER_TCODE(TCODE_STREAM_DATA);
+		// The value of destination_id argument should include tag, channel, and sy fields
+		// as isochronous packet header has.
+		packet->header[0] = destination_id;
+		isoc_header_set_data_length(packet->header, length);
+		isoc_header_set_tcode(packet->header, TCODE_STREAM_DATA);
 		packet->header_length = 4;
 		packet->payload = payload;
 		packet->payload_length = length;
@@ -248,28 +234,24 @@ static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
 	} else
 		ext_tcode = 0;
 
-	packet->header[0] =
-		HEADER_RETRY(RETRY_X) |
-		HEADER_TLABEL(tlabel) |
-		HEADER_TCODE(tcode) |
-		HEADER_DESTINATION(destination_id);
-	packet->header[1] =
-		HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id);
-	packet->header[2] =
-		offset;
+	async_header_set_retry(packet->header, RETRY_X);
+	async_header_set_tlabel(packet->header, tlabel);
+	async_header_set_tcode(packet->header, tcode);
+	async_header_set_destination(packet->header, destination_id);
+	async_header_set_source(packet->header, source_id);
+	async_header_set_offset(packet->header, offset);
 
 	switch (tcode) {
 	case TCODE_WRITE_QUADLET_REQUEST:
-		packet->header[3] = *(u32 *)payload;
+		async_header_set_quadlet_data(packet->header, *(u32 *)payload);
 		packet->header_length = 16;
 		packet->payload_length = 0;
 		break;
 
 	case TCODE_LOCK_REQUEST:
 	case TCODE_WRITE_BLOCK_REQUEST:
-		packet->header[3] =
-			HEADER_DATA_LENGTH(length) |
-			HEADER_EXTENDED_TCODE(ext_tcode);
+		async_header_set_data_length(packet->header, length);
+		async_header_set_extended_tcode(packet->header, ext_tcode);
 		packet->header_length = 16;
 		packet->payload = payload;
 		packet->payload_length = length;
@@ -281,9 +263,8 @@ static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
 		break;
 
 	case TCODE_READ_BLOCK_REQUEST:
-		packet->header[3] =
-			HEADER_DATA_LENGTH(length) |
-			HEADER_EXTENDED_TCODE(ext_tcode);
+		async_header_set_data_length(packet->header, length);
+		async_header_set_extended_tcode(packet->header, ext_tcode);
 		packet->header_length = 16;
 		packet->payload_length = 0;
 		break;
@@ -417,6 +398,9 @@ void __fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode
 
 	spin_unlock_irqrestore(&card->lock, flags);
 
+	trace_async_request_outbound_initiate((uintptr_t)t, generation, speed, t->packet.header, payload,
+					      tcode_is_read_request(tcode) ? 0 : length / 4);
+
 	card->driver->send_request(card, &t->packet);
 }
 EXPORT_SYMBOL_GPL(__fw_send_request);
@@ -479,6 +463,8 @@ static DECLARE_COMPLETION(phy_config_done);
 static void transmit_phy_packet_callback(struct fw_packet *packet,
 					 struct fw_card *card, int status)
 {
+	trace_async_phy_outbound_complete((uintptr_t)packet, packet->generation, status,
+					  packet->timestamp);
 	complete(&phy_config_done);
 }
 
@@ -517,6 +503,10 @@ void fw_send_phy_config(struct fw_card *card,
 	phy_config_packet.generation = generation;
 	reinit_completion(&phy_config_done);
 
+	trace_async_phy_outbound_initiate((uintptr_t)&phy_config_packet,
+					  phy_config_packet.generation, phy_config_packet.header[1],
+					  phy_config_packet.header[2]);
+
 	card->driver->send_request(card, &phy_config_packet);
 	wait_for_completion_timeout(&phy_config_done, timeout);
 
@@ -655,7 +645,7 @@ EXPORT_SYMBOL(fw_core_remove_address_handler);
 struct fw_request {
 	struct kref kref;
 	struct fw_packet response;
-	u32 request_header[4];
+	u32 request_header[ASYNC_HEADER_QUADLET_COUNT];
 	int ack;
 	u32 timestamp;
 	u32 length;
@@ -684,6 +674,9 @@ static void free_response_callback(struct fw_packet *packet,
 {
 	struct fw_request *request = container_of(packet, struct fw_request, response);
 
+	trace_async_response_outbound_complete((uintptr_t)request, packet->generation,
+					       packet->speed, status, packet->timestamp);
+
 	// Decrease the reference count since not at in-flight.
 	fw_request_put(request);
 
@@ -695,7 +688,7 @@ int fw_get_response_length(struct fw_request *r)
 {
 	int tcode, ext_tcode, data_length;
 
-	tcode = HEADER_GET_TCODE(r->request_header[0]);
+	tcode = async_header_get_tcode(r->request_header);
 
 	switch (tcode) {
 	case TCODE_WRITE_QUADLET_REQUEST:
@@ -706,12 +699,12 @@ int fw_get_response_length(struct fw_request *r)
 		return 4;
 
 	case TCODE_READ_BLOCK_REQUEST:
-		data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]);
+		data_length = async_header_get_data_length(r->request_header);
 		return data_length;
 
 	case TCODE_LOCK_REQUEST:
-		ext_tcode = HEADER_GET_EXTENDED_TCODE(r->request_header[3]);
-		data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]);
+		ext_tcode = async_header_get_extended_tcode(r->request_header);
+		data_length = async_header_get_data_length(r->request_header);
 		switch (ext_tcode) {
 		case EXTCODE_FETCH_ADD:
 		case EXTCODE_LITTLE_ADD:
@@ -731,46 +724,42 @@ void fw_fill_response(struct fw_packet *response, u32 *request_header,
 {
 	int tcode, tlabel, extended_tcode, source, destination;
 
-	tcode          = HEADER_GET_TCODE(request_header[0]);
-	tlabel         = HEADER_GET_TLABEL(request_header[0]);
-	source         = HEADER_GET_DESTINATION(request_header[0]);
-	destination    = HEADER_GET_SOURCE(request_header[1]);
-	extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);
+	tcode = async_header_get_tcode(request_header);
+	tlabel = async_header_get_tlabel(request_header);
+	source = async_header_get_destination(request_header); // Exchange.
+	destination = async_header_get_source(request_header); // Exchange.
+	extended_tcode = async_header_get_extended_tcode(request_header);
 
-	response->header[0] =
-		HEADER_RETRY(RETRY_1) |
-		HEADER_TLABEL(tlabel) |
-		HEADER_DESTINATION(destination);
-	response->header[1] =
-		HEADER_SOURCE(source) |
-		HEADER_RCODE(rcode);
-	response->header[2] = 0;
+	async_header_set_retry(response->header, RETRY_1);
+	async_header_set_tlabel(response->header, tlabel);
+	async_header_set_destination(response->header, destination);
+	async_header_set_source(response->header, source);
+	async_header_set_rcode(response->header, rcode);
+	response->header[2] = 0;	// The field is reserved.
 
 	switch (tcode) {
 	case TCODE_WRITE_QUADLET_REQUEST:
 	case TCODE_WRITE_BLOCK_REQUEST:
-		response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
+		async_header_set_tcode(response->header, TCODE_WRITE_RESPONSE);
 		response->header_length = 12;
 		response->payload_length = 0;
 		break;
 
 	case TCODE_READ_QUADLET_REQUEST:
-		response->header[0] |=
-			HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
+		async_header_set_tcode(response->header, TCODE_READ_QUADLET_RESPONSE);
 		if (payload != NULL)
-			response->header[3] = *(u32 *)payload;
+			async_header_set_quadlet_data(response->header, *(u32 *)payload);
 		else
-			response->header[3] = 0;
+			async_header_set_quadlet_data(response->header, 0);
 		response->header_length = 16;
 		response->payload_length = 0;
 		break;
 
 	case TCODE_READ_BLOCK_REQUEST:
 	case TCODE_LOCK_REQUEST:
-		response->header[0] |= HEADER_TCODE(tcode + 2);
-		response->header[3] =
-			HEADER_DATA_LENGTH(length) |
-			HEADER_EXTENDED_TCODE(extended_tcode);
+		async_header_set_tcode(response->header, tcode + 2);
+		async_header_set_data_length(response->header, length);
+		async_header_set_extended_tcode(response->header, extended_tcode);
 		response->header_length = 16;
 		response->payload = payload;
 		response->payload_length = length;
@@ -807,7 +796,7 @@ static struct fw_request *allocate_request(struct fw_card *card,
 	u32 *data, length;
 	int request_tcode;
 
-	request_tcode = HEADER_GET_TCODE(p->header[0]);
+	request_tcode = async_header_get_tcode(p->header);
 	switch (request_tcode) {
 	case TCODE_WRITE_QUADLET_REQUEST:
 		data = &p->header[3];
@@ -817,7 +806,7 @@ static struct fw_request *allocate_request(struct fw_card *card,
 	case TCODE_WRITE_BLOCK_REQUEST:
 	case TCODE_LOCK_REQUEST:
 		data = p->payload;
-		length = HEADER_GET_DATA_LENGTH(p->header[3]);
+		length = async_header_get_data_length(p->header);
 		break;
 
 	case TCODE_READ_QUADLET_REQUEST:
@@ -827,7 +816,7 @@ static struct fw_request *allocate_request(struct fw_card *card,
 
 	case TCODE_READ_BLOCK_REQUEST:
 		data = NULL;
-		length = HEADER_GET_DATA_LENGTH(p->header[3]);
+		length = async_header_get_data_length(p->header);
 		break;
 
 	default:
@@ -870,24 +859,30 @@ static struct fw_request *allocate_request(struct fw_card *card,
 void fw_send_response(struct fw_card *card,
 		      struct fw_request *request, int rcode)
 {
+	u32 *data = NULL;
+	unsigned int data_length = 0;
+
 	/* unified transaction or broadcast transaction: don't respond */
 	if (request->ack != ACK_PENDING ||
-	    HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) {
+	    HEADER_DESTINATION_IS_BROADCAST(request->request_header)) {
 		fw_request_put(request);
 		return;
 	}
 
-	if (rcode == RCODE_COMPLETE)
-		fw_fill_response(&request->response, request->request_header,
-				 rcode, request->data,
-				 fw_get_response_length(request));
-	else
-		fw_fill_response(&request->response, request->request_header,
-				 rcode, NULL, 0);
+	if (rcode == RCODE_COMPLETE) {
+		data = request->data;
+		data_length = fw_get_response_length(request);
+	}
+
+	fw_fill_response(&request->response, request->request_header, rcode, data, data_length);
 
 	// Increase the reference count so that the object is kept during in-flight.
 	fw_request_get(request);
 
+	trace_async_response_outbound_initiate((uintptr_t)request, request->response.generation,
+					       request->response.speed, request->response.header,
+					       data, data ? data_length / 4 : 0);
+
 	card->driver->send_response(card, &request->response);
 }
 EXPORT_SYMBOL(fw_send_response);
@@ -926,11 +921,11 @@ static void handle_exclusive_region_request(struct fw_card *card,
 	struct fw_address_handler *handler;
 	int tcode, destination, source;
 
-	destination = HEADER_GET_DESTINATION(p->header[0]);
-	source      = HEADER_GET_SOURCE(p->header[1]);
-	tcode       = HEADER_GET_TCODE(p->header[0]);
+	destination = async_header_get_destination(p->header);
+	source = async_header_get_source(p->header);
+	tcode = async_header_get_tcode(p->header);
 	if (tcode == TCODE_LOCK_REQUEST)
-		tcode = 0x10 + HEADER_GET_EXTENDED_TCODE(p->header[3]);
+		tcode = 0x10 + async_header_get_extended_tcode(p->header);
 
 	rcu_read_lock();
 	handler = lookup_enclosing_address_handler(&address_handler_list,
@@ -963,9 +958,9 @@ static void handle_fcp_region_request(struct fw_card *card,
 		return;
 	}
 
-	tcode       = HEADER_GET_TCODE(p->header[0]);
-	destination = HEADER_GET_DESTINATION(p->header[0]);
-	source      = HEADER_GET_SOURCE(p->header[1]);
+	tcode = async_header_get_tcode(p->header);
+	destination = async_header_get_destination(p->header);
+	source = async_header_get_source(p->header);
 
 	if (tcode != TCODE_WRITE_QUADLET_REQUEST &&
 	    tcode != TCODE_WRITE_BLOCK_REQUEST) {
@@ -993,11 +988,15 @@ void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
 {
 	struct fw_request *request;
 	unsigned long long offset;
+	unsigned int tcode;
 
 	if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
 		return;
 
-	if (TCODE_IS_LINK_INTERNAL(HEADER_GET_TCODE(p->header[0]))) {
+	tcode = async_header_get_tcode(p->header);
+	if (tcode_is_link_internal(tcode)) {
+		trace_async_phy_inbound((uintptr_t)p, p->generation, p->ack, p->timestamp,
+					 p->header[1], p->header[2]);
 		fw_cdev_handle_phy_packet(card, p);
 		return;
 	}
@@ -1008,8 +1007,11 @@ void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
 		return;
 	}
 
-	offset = ((u64)HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) |
-		p->header[2];
+	trace_async_request_inbound((uintptr_t)request, p->generation, p->speed, p->ack,
+				    p->timestamp, p->header, request->data,
+				    tcode_is_read_request(tcode) ? 0 : request->length / 4);
+
+	offset = async_header_get_offset(p->header);
 
 	if (!is_in_fcp_region(offset, request->length))
 		handle_exclusive_region_request(card, p, request, offset);
@@ -1027,10 +1029,39 @@ void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
 	size_t data_length;
 	int tcode, tlabel, source, rcode;
 
-	tcode	= HEADER_GET_TCODE(p->header[0]);
-	tlabel	= HEADER_GET_TLABEL(p->header[0]);
-	source	= HEADER_GET_SOURCE(p->header[1]);
-	rcode	= HEADER_GET_RCODE(p->header[1]);
+	tcode = async_header_get_tcode(p->header);
+	tlabel = async_header_get_tlabel(p->header);
+	source = async_header_get_source(p->header);
+	rcode = async_header_get_rcode(p->header);
+
+	// FIXME: sanity check packet, is length correct, does tcodes
+	// and addresses match to the transaction request queried later.
+	//
+	// For the tracepoints event, let us decode the header here against the concern.
+
+	switch (tcode) {
+	case TCODE_READ_QUADLET_RESPONSE:
+		data = (u32 *) &p->header[3];
+		data_length = 4;
+		break;
+
+	case TCODE_WRITE_RESPONSE:
+		data = NULL;
+		data_length = 0;
+		break;
+
+	case TCODE_READ_BLOCK_RESPONSE:
+	case TCODE_LOCK_RESPONSE:
+		data = p->payload;
+		data_length = async_header_get_data_length(p->header);
+		break;
+
+	default:
+		/* Should never happen, this is just to shut up gcc. */
+		data = NULL;
+		data_length = 0;
+		break;
+	}
 
 	spin_lock_irqsave(&card->lock, flags);
 	list_for_each_entry(iter, &card->transaction_list, link) {
@@ -1047,6 +1078,9 @@ void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
 	}
 	spin_unlock_irqrestore(&card->lock, flags);
 
+	trace_async_response_inbound((uintptr_t)t, p->generation, p->speed, p->ack, p->timestamp,
+				     p->header, data, data_length / 4);
+
 	if (!t) {
  timed_out:
 		fw_notice(card, "unsolicited response (source %x, tlabel %x)\n",
@@ -1054,35 +1088,6 @@ void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
 		return;
 	}
 
-	/*
-	 * FIXME: sanity check packet, is length correct, does tcodes
-	 * and addresses match.
-	 */
-
-	switch (tcode) {
-	case TCODE_READ_QUADLET_RESPONSE:
-		data = (u32 *) &p->header[3];
-		data_length = 4;
-		break;
-
-	case TCODE_WRITE_RESPONSE:
-		data = NULL;
-		data_length = 0;
-		break;
-
-	case TCODE_READ_BLOCK_RESPONSE:
-	case TCODE_LOCK_RESPONSE:
-		data = p->payload;
-		data_length = HEADER_GET_DATA_LENGTH(p->header[3]);
-		break;
-
-	default:
-		/* Should never happen, this is just to shut up gcc. */
-		data = NULL;
-		data_length = 0;
-		break;
-	}
-
 	/*
 	 * The response handler may be executed while the request handler
 	 * is still pending.  Cancel the request handler.
@@ -1135,7 +1140,7 @@ static void handle_topology_map(struct fw_card *card, struct fw_request *request
 {
 	int start;
 
-	if (!TCODE_IS_READ_REQUEST(tcode)) {
+	if (!tcode_is_read_request(tcode)) {
 		fw_send_response(card, request, RCODE_TYPE_ERROR);
 		return;
 	}
diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h
index 95c10f3d2282..7c36d2628e37 100644
--- a/drivers/firewire/core.h
+++ b/drivers/firewire/core.h
@@ -225,13 +225,20 @@ static inline bool is_next_generation(int new_generation, int old_generation)
 
 #define TCODE_LINK_INTERNAL		0xe
 
-#define TCODE_IS_READ_REQUEST(tcode)	(((tcode) & ~1) == 4)
-#define TCODE_IS_BLOCK_PACKET(tcode)	(((tcode) &  1) != 0)
-#define TCODE_IS_LINK_INTERNAL(tcode)	((tcode) == TCODE_LINK_INTERNAL)
-#define TCODE_IS_REQUEST(tcode)		(((tcode) &  2) == 0)
-#define TCODE_IS_RESPONSE(tcode)	(((tcode) &  2) != 0)
-#define TCODE_HAS_REQUEST_DATA(tcode)	(((tcode) & 12) != 4)
-#define TCODE_HAS_RESPONSE_DATA(tcode)	(((tcode) & 12) != 0)
+static inline bool tcode_is_read_request(unsigned int tcode)
+{
+	return (tcode & ~1u) == 4u;
+}
+
+static inline bool tcode_is_block_packet(unsigned int tcode)
+{
+	return (tcode & 1u) != 0u;
+}
+
+static inline bool tcode_is_link_internal(unsigned int tcode)
+{
+	return (tcode == TCODE_LINK_INTERNAL);
+}
 
 #define LOCAL_BUS 0xffc0
 
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index b9ae0340b8a7..f6de0b3a9a55 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -40,6 +40,7 @@
 
 #include "core.h"
 #include "ohci.h"
+#include "packet-header-definitions.h"
 
 #define ohci_info(ohci, f, args...)	dev_info(ohci->card.device, f, ##args)
 #define ohci_notice(ohci, f, args...)	dev_notice(ohci->card.device, f, ##args)
@@ -393,7 +394,6 @@ MODULE_PARM_DESC(quirks, "Chip quirks (default = 0"
 #define OHCI_PARAM_DEBUG_AT_AR		1
 #define OHCI_PARAM_DEBUG_SELFIDS	2
 #define OHCI_PARAM_DEBUG_IRQS		4
-#define OHCI_PARAM_DEBUG_BUSRESETS	8 /* only effective before chip init */
 
 static int param_debug;
 module_param_named(debug, param_debug, int, 0644);
@@ -401,7 +401,6 @@ MODULE_PARM_DESC(debug, "Verbose logging (default = 0"
 	", AT/AR events = "	__stringify(OHCI_PARAM_DEBUG_AT_AR)
 	", self-IDs = "		__stringify(OHCI_PARAM_DEBUG_SELFIDS)
 	", IRQs = "		__stringify(OHCI_PARAM_DEBUG_IRQS)
-	", busReset events = "	__stringify(OHCI_PARAM_DEBUG_BUSRESETS)
 	", or a combination, or all = -1)");
 
 static bool param_remote_dma;
@@ -410,12 +409,7 @@ MODULE_PARM_DESC(remote_dma, "Enable unfiltered remote DMA (default = N)");
 
 static void log_irqs(struct fw_ohci *ohci, u32 evt)
 {
-	if (likely(!(param_debug &
-			(OHCI_PARAM_DEBUG_IRQS | OHCI_PARAM_DEBUG_BUSRESETS))))
-		return;
-
-	if (!(param_debug & OHCI_PARAM_DEBUG_IRQS) &&
-	    !(evt & OHCI1394_busReset))
+	if (likely(!(param_debug & OHCI_PARAM_DEBUG_IRQS)))
 		return;
 
 	ohci_notice(ohci, "IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt,
@@ -516,14 +510,14 @@ static const char *tcodes[] = {
 static void log_ar_at_event(struct fw_ohci *ohci,
 			    char dir, int speed, u32 *header, int evt)
 {
-	int tcode = header[0] >> 4 & 0xf;
+	int tcode = async_header_get_tcode(header);
 	char specific[12];
 
 	if (likely(!(param_debug & OHCI_PARAM_DEBUG_AT_AR)))
 		return;
 
 	if (unlikely(evt >= ARRAY_SIZE(evts)))
-			evt = 0x1f;
+		evt = 0x1f;
 
 	if (evt == OHCI1394_evt_bus_reset) {
 		ohci_notice(ohci, "A%c evt_bus_reset, generation %d\n",
@@ -532,20 +526,27 @@ static void log_ar_at_event(struct fw_ohci *ohci,
 	}
 
 	switch (tcode) {
-	case 0x0: case 0x6: case 0x8:
+	case TCODE_WRITE_QUADLET_REQUEST:
+	case TCODE_READ_QUADLET_RESPONSE:
+	case TCODE_CYCLE_START:
 		snprintf(specific, sizeof(specific), " = %08x",
 			 be32_to_cpu((__force __be32)header[3]));
 		break;
-	case 0x1: case 0x5: case 0x7: case 0x9: case 0xb:
+	case TCODE_WRITE_BLOCK_REQUEST:
+	case TCODE_READ_BLOCK_REQUEST:
+	case TCODE_READ_BLOCK_RESPONSE:
+	case TCODE_LOCK_REQUEST:
+	case TCODE_LOCK_RESPONSE:
 		snprintf(specific, sizeof(specific), " %x,%x",
-			 header[3] >> 16, header[3] & 0xffff);
+			 async_header_get_data_length(header),
+			 async_header_get_extended_tcode(header));
 		break;
 	default:
 		specific[0] = '\0';
 	}
 
 	switch (tcode) {
-	case 0xa:
+	case TCODE_STREAM_DATA:
 		ohci_notice(ohci, "A%c %s, %s\n",
 			    dir, evts[evt], tcodes[tcode]);
 		break;
@@ -553,19 +554,23 @@ static void log_ar_at_event(struct fw_ohci *ohci,
 		ohci_notice(ohci, "A%c %s, PHY %08x %08x\n",
 			    dir, evts[evt], header[1], header[2]);
 		break;
-	case 0x0: case 0x1: case 0x4: case 0x5: case 0x9:
+	case TCODE_WRITE_QUADLET_REQUEST:
+	case TCODE_WRITE_BLOCK_REQUEST:
+	case TCODE_READ_QUADLET_REQUEST:
+	case TCODE_READ_BLOCK_REQUEST:
+	case TCODE_LOCK_REQUEST:
 		ohci_notice(ohci,
-			    "A%c spd %x tl %02x, %04x -> %04x, %s, %s, %04x%08x%s\n",
-			    dir, speed, header[0] >> 10 & 0x3f,
-			    header[1] >> 16, header[0] >> 16, evts[evt],
-			    tcodes[tcode], header[1] & 0xffff, header[2], specific);
+			    "A%c spd %x tl %02x, %04x -> %04x, %s, %s, %012llx%s\n",
+			    dir, speed, async_header_get_tlabel(header),
+			    async_header_get_source(header), async_header_get_destination(header),
+			    evts[evt], tcodes[tcode], async_header_get_offset(header), specific);
 		break;
 	default:
 		ohci_notice(ohci,
 			    "A%c spd %x tl %02x, %04x -> %04x, %s, %s%s\n",
-			    dir, speed, header[0] >> 10 & 0x3f,
-			    header[1] >> 16, header[0] >> 16, evts[evt],
-			    tcodes[tcode], specific);
+			    dir, speed, async_header_get_tlabel(header),
+			    async_header_get_source(header), async_header_get_destination(header),
+			    evts[evt], tcodes[tcode], specific);
 	}
 }
 
@@ -853,7 +858,7 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
 	p.header[1] = cond_le32_to_cpu(buffer[1]);
 	p.header[2] = cond_le32_to_cpu(buffer[2]);
 
-	tcode = (p.header[0] >> 4) & 0x0f;
+	tcode = async_header_get_tcode(p.header);
 	switch (tcode) {
 	case TCODE_WRITE_QUADLET_REQUEST:
 	case TCODE_READ_QUADLET_RESPONSE:
@@ -874,7 +879,7 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
 	case TCODE_LOCK_RESPONSE:
 		p.header[3] = cond_le32_to_cpu(buffer[3]);
 		p.header_length = 16;
-		p.payload_length = p.header[3] >> 16;
+		p.payload_length = async_header_get_data_length(p.header);
 		if (p.payload_length > MAX_ASYNC_PAYLOAD) {
 			ar_context_abort(ctx, "invalid packet length");
 			return NULL;
@@ -911,8 +916,7 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
 	 * Several controllers, notably from NEC and VIA, forget to
 	 * write ack_complete status at PHY packet reception.
 	 */
-	if (evt == OHCI1394_evt_no_status &&
-	    (p.header[0] & 0xff) == (OHCI1394_phy_tcode << 4))
+	if (evt == OHCI1394_evt_no_status && tcode == OHCI1394_phy_tcode)
 		p.ack = ACK_COMPLETE;
 
 	/*
@@ -1353,7 +1357,7 @@ static int at_context_queue_packet(struct context *ctx,
 	 * accordingly.
 	 */
 
-	tcode = (packet->header[0] >> 4) & 0x0f;
+	tcode = async_header_get_tcode(packet->header);
 	header = (__le32 *) &d[1];
 	switch (tcode) {
 	case TCODE_WRITE_QUADLET_REQUEST:
@@ -1371,7 +1375,7 @@ static int at_context_queue_packet(struct context *ctx,
 					(packet->header[0] & 0xffff0000));
 		header[2] = cpu_to_le32(packet->header[2]);
 
-		if (TCODE_IS_BLOCK_PACKET(tcode))
+		if (tcode_is_block_packet(tcode))
 			header[3] = cpu_to_le32(packet->header[3]);
 		else
 			header[3] = (__force __le32) packet->header[3];
@@ -1550,12 +1554,6 @@ static int handle_at_packet(struct context *context,
 	return 1;
 }
 
-#define HEADER_GET_DESTINATION(q)	(((q) >> 16) & 0xffff)
-#define HEADER_GET_TCODE(q)		(((q) >> 4) & 0x0f)
-#define HEADER_GET_OFFSET_HIGH(q)	(((q) >> 0) & 0xffff)
-#define HEADER_GET_DATA_LENGTH(q)	(((q) >> 16) & 0xffff)
-#define HEADER_GET_EXTENDED_TCODE(q)	(((q) >> 0) & 0xffff)
-
 static u32 get_cycle_time(struct fw_ohci *ohci);
 
 static void handle_local_rom(struct fw_ohci *ohci,
@@ -1564,9 +1562,9 @@ static void handle_local_rom(struct fw_ohci *ohci,
 	struct fw_packet response;
 	int tcode, length, i;
 
-	tcode = HEADER_GET_TCODE(packet->header[0]);
-	if (TCODE_IS_BLOCK_PACKET(tcode))
-		length = HEADER_GET_DATA_LENGTH(packet->header[3]);
+	tcode = async_header_get_tcode(packet->header);
+	if (tcode_is_block_packet(tcode))
+		length = async_header_get_data_length(packet->header);
 	else
 		length = 4;
 
@@ -1574,7 +1572,7 @@ static void handle_local_rom(struct fw_ohci *ohci,
 	if (i + length > CONFIG_ROM_SIZE) {
 		fw_fill_response(&response, packet->header,
 				 RCODE_ADDRESS_ERROR, NULL, 0);
-	} else if (!TCODE_IS_READ_REQUEST(tcode)) {
+	} else if (!tcode_is_read_request(tcode)) {
 		fw_fill_response(&response, packet->header,
 				 RCODE_TYPE_ERROR, NULL, 0);
 	} else {
@@ -1595,10 +1593,10 @@ static void handle_local_lock(struct fw_ohci *ohci,
 	__be32 *payload, lock_old;
 	u32 lock_arg, lock_data;
 
-	tcode = HEADER_GET_TCODE(packet->header[0]);
-	length = HEADER_GET_DATA_LENGTH(packet->header[3]);
+	tcode = async_header_get_tcode(packet->header);
+	length = async_header_get_data_length(packet->header);
 	payload = packet->payload;
-	ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]);
+	ext_tcode = async_header_get_extended_tcode(packet->header);
 
 	if (tcode == TCODE_LOCK_REQUEST &&
 	    ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) {
@@ -1646,10 +1644,7 @@ static void handle_local_request(struct context *ctx, struct fw_packet *packet)
 		packet->callback(packet, &ctx->ohci->card, packet->ack);
 	}
 
-	offset =
-		((unsigned long long)
-		 HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) |
-		packet->header[2];
+	offset = async_header_get_offset(packet->header);
 	csr = offset - CSR_REGISTER_BASE;
 
 	/* Handle config rom reads. */
@@ -1683,7 +1678,7 @@ static void at_context_transmit(struct context *ctx, struct fw_packet *packet)
 
 	spin_lock_irqsave(&ctx->ohci->lock, flags);
 
-	if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id &&
+	if (async_header_get_destination(packet->header) == ctx->ohci->node_id &&
 	    ctx->ohci->generation == packet->generation) {
 		spin_unlock_irqrestore(&ctx->ohci->lock, flags);
 
@@ -2064,8 +2059,7 @@ static void bus_reset_work(struct work_struct *work)
 
 	ohci->generation = generation;
 	reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset);
-	if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS)
-		reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset);
+	reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset);
 
 	if (ohci->quirks & QUIRK_RESET_PACKET)
 		ohci->request_generation = generation;
@@ -2137,6 +2131,7 @@ static irqreturn_t irq_handler(int irq, void *data)
 	reg_write(ohci, OHCI1394_IntEventClear,
 		  event & ~(OHCI1394_busReset | OHCI1394_postedWriteErr));
 	log_irqs(ohci, event);
+	// The flag is masked again at bus_reset_work() scheduled by selfID event.
 	if (event & OHCI1394_busReset)
 		reg_write(ohci, OHCI1394_IntMaskClear, OHCI1394_busReset);
 
@@ -2476,9 +2471,8 @@ static int ohci_enable(struct fw_card *card,
 		OHCI1394_cycleInconsistent |
 		OHCI1394_unrecoverableError |
 		OHCI1394_cycleTooLong |
-		OHCI1394_masterIntEnable;
-	if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS)
-		irqs |= OHCI1394_busReset;
+		OHCI1394_masterIntEnable |
+		OHCI1394_busReset;
 	reg_write(ohci, OHCI1394_IntMaskSet, irqs);
 
 	reg_write(ohci, OHCI1394_HCControlSet,
@@ -3631,7 +3625,7 @@ static int pci_probe(struct pci_dev *dev,
 	struct fw_ohci *ohci;
 	u32 bus_options, max_receive, link_speed, version;
 	u64 guid;
-	int i, err;
+	int i, flags, irq, err;
 	size_t size;
 
 	if (dev->vendor == PCI_VENDOR_ID_PINNACLE_SYSTEMS) {
@@ -3756,18 +3750,29 @@ static int pci_probe(struct pci_dev *dev,
 	guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) |
 		reg_read(ohci, OHCI1394_GUIDLo);
 
+	flags = PCI_IRQ_INTX;
 	if (!(ohci->quirks & QUIRK_NO_MSI))
-		pci_enable_msi(dev);
-	err = devm_request_irq(&dev->dev, dev->irq, irq_handler,
-			       pci_dev_msi_enabled(dev) ? 0 : IRQF_SHARED, ohci_driver_name, ohci);
+		flags |= PCI_IRQ_MSI;
+	err = pci_alloc_irq_vectors(dev, 1, 1, flags);
+	if (err < 0)
+		return err;
+	irq = pci_irq_vector(dev, 0);
+	if (irq < 0) {
+		err = irq;
+		goto fail_msi;
+	}
+
+	err = request_threaded_irq(irq, irq_handler, NULL,
+				   pci_dev_msi_enabled(dev) ? 0 : IRQF_SHARED, ohci_driver_name,
+				   ohci);
 	if (err < 0) {
-		ohci_err(ohci, "failed to allocate interrupt %d\n", dev->irq);
+		ohci_err(ohci, "failed to allocate interrupt %d\n", irq);
 		goto fail_msi;
 	}
 
 	err = fw_card_add(&ohci->card, max_receive, link_speed, guid);
 	if (err)
-		goto fail_msi;
+		goto fail_irq;
 
 	version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
 	ohci_notice(ohci,
@@ -3780,9 +3785,10 @@ static int pci_probe(struct pci_dev *dev,
 
 	return 0;
 
+ fail_irq:
+	free_irq(irq, ohci);
  fail_msi:
-	devm_free_irq(&dev->dev, dev->irq, ohci);
-	pci_disable_msi(dev);
+	pci_free_irq_vectors(dev);
 
 	return err;
 }
@@ -3790,6 +3796,7 @@ static int pci_probe(struct pci_dev *dev,
 static void pci_remove(struct pci_dev *dev)
 {
 	struct fw_ohci *ohci = pci_get_drvdata(dev);
+	int irq;
 
 	/*
 	 * If the removal is happening from the suspend state, LPS won't be
@@ -3809,8 +3816,10 @@ static void pci_remove(struct pci_dev *dev)
 
 	software_reset(ohci);
 
-	devm_free_irq(&dev->dev, dev->irq, ohci);
-	pci_disable_msi(dev);
+	irq = pci_irq_vector(dev, 0);
+	if (irq >= 0)
+		free_irq(irq, ohci);
+	pci_free_irq_vectors(dev);
 
 	dev_notice(&dev->dev, "removing fw-ohci device\n");
 }
diff --git a/drivers/firewire/packet-header-definitions.h b/drivers/firewire/packet-header-definitions.h
new file mode 100644
index 000000000000..ab9d0fa790d4
--- /dev/null
+++ b/drivers/firewire/packet-header-definitions.h
@@ -0,0 +1,234 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+//
+// packet-header-definitions.h - The definitions of header fields for IEEE 1394 packet.
+//
+// Copyright (c) 2024 Takashi Sakamoto
+
+#ifndef _FIREWIRE_PACKET_HEADER_DEFINITIONS_H
+#define _FIREWIRE_PACKET_HEADER_DEFINITIONS_H
+
+#define ASYNC_HEADER_QUADLET_COUNT		4
+
+#define ASYNC_HEADER_Q0_DESTINATION_SHIFT	16
+#define ASYNC_HEADER_Q0_DESTINATION_MASK	0xffff0000
+#define ASYNC_HEADER_Q0_TLABEL_SHIFT		10
+#define ASYNC_HEADER_Q0_TLABEL_MASK		0x0000fc00
+#define ASYNC_HEADER_Q0_RETRY_SHIFT		8
+#define ASYNC_HEADER_Q0_RETRY_MASK		0x00000300
+#define ASYNC_HEADER_Q0_TCODE_SHIFT		4
+#define ASYNC_HEADER_Q0_TCODE_MASK		0x000000f0
+#define ASYNC_HEADER_Q0_PRIORITY_SHIFT		0
+#define ASYNC_HEADER_Q0_PRIORITY_MASK		0x0000000f
+#define ASYNC_HEADER_Q1_SOURCE_SHIFT		16
+#define ASYNC_HEADER_Q1_SOURCE_MASK		0xffff0000
+#define ASYNC_HEADER_Q1_RCODE_SHIFT		12
+#define ASYNC_HEADER_Q1_RCODE_MASK		0x0000f000
+#define ASYNC_HEADER_Q1_RCODE_SHIFT		12
+#define ASYNC_HEADER_Q1_RCODE_MASK		0x0000f000
+#define ASYNC_HEADER_Q1_OFFSET_HIGH_SHIFT	0
+#define ASYNC_HEADER_Q1_OFFSET_HIGH_MASK	0x0000ffff
+#define ASYNC_HEADER_Q3_DATA_LENGTH_SHIFT	16
+#define ASYNC_HEADER_Q3_DATA_LENGTH_MASK	0xffff0000
+#define ASYNC_HEADER_Q3_EXTENDED_TCODE_SHIFT	0
+#define ASYNC_HEADER_Q3_EXTENDED_TCODE_MASK	0x0000ffff
+
+static inline unsigned int async_header_get_destination(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	return (header[0] & ASYNC_HEADER_Q0_DESTINATION_MASK) >> ASYNC_HEADER_Q0_DESTINATION_SHIFT;
+}
+
+static inline unsigned int async_header_get_tlabel(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	return (header[0] & ASYNC_HEADER_Q0_TLABEL_MASK) >> ASYNC_HEADER_Q0_TLABEL_SHIFT;
+}
+
+static inline unsigned int async_header_get_retry(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	return (header[0] & ASYNC_HEADER_Q0_RETRY_MASK) >> ASYNC_HEADER_Q0_RETRY_SHIFT;
+}
+
+static inline unsigned int async_header_get_tcode(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	return (header[0] & ASYNC_HEADER_Q0_TCODE_MASK) >> ASYNC_HEADER_Q0_TCODE_SHIFT;
+}
+
+static inline unsigned int async_header_get_priority(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	return (header[0] & ASYNC_HEADER_Q0_PRIORITY_MASK) >> ASYNC_HEADER_Q0_PRIORITY_SHIFT;
+}
+
+static inline unsigned int async_header_get_source(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	return (header[1] & ASYNC_HEADER_Q1_SOURCE_MASK) >> ASYNC_HEADER_Q1_SOURCE_SHIFT;
+}
+
+static inline unsigned int async_header_get_rcode(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	return (header[1] & ASYNC_HEADER_Q1_RCODE_MASK) >> ASYNC_HEADER_Q1_RCODE_SHIFT;
+}
+
+static inline u64 async_header_get_offset(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	u32 hi = (header[1] & ASYNC_HEADER_Q1_OFFSET_HIGH_MASK) >> ASYNC_HEADER_Q1_OFFSET_HIGH_SHIFT;
+	return (((u64)hi) << 32) | ((u64)header[2]);
+}
+
+static inline u32 async_header_get_quadlet_data(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	return header[3];
+}
+
+static inline unsigned int async_header_get_data_length(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	return (header[3] & ASYNC_HEADER_Q3_DATA_LENGTH_MASK) >> ASYNC_HEADER_Q3_DATA_LENGTH_SHIFT;
+}
+
+static inline unsigned int async_header_get_extended_tcode(const u32 header[ASYNC_HEADER_QUADLET_COUNT])
+{
+	return (header[3] & ASYNC_HEADER_Q3_EXTENDED_TCODE_MASK) >> ASYNC_HEADER_Q3_EXTENDED_TCODE_SHIFT;
+}
+
+static inline void async_header_set_destination(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						unsigned int destination)
+{
+	header[0] &= ~ASYNC_HEADER_Q0_DESTINATION_MASK;
+	header[0] |= (((u32)destination) << ASYNC_HEADER_Q0_DESTINATION_SHIFT) & ASYNC_HEADER_Q0_DESTINATION_MASK;
+}
+
+static inline void async_header_set_tlabel(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					   unsigned int tlabel)
+{
+	header[0] &= ~ASYNC_HEADER_Q0_TLABEL_MASK;
+	header[0] |= (((u32)tlabel) << ASYNC_HEADER_Q0_TLABEL_SHIFT) & ASYNC_HEADER_Q0_TLABEL_MASK;
+}
+
+static inline void async_header_set_retry(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					  unsigned int retry)
+{
+	header[0] &= ~ASYNC_HEADER_Q0_RETRY_MASK;
+	header[0] |= (((u32)retry) << ASYNC_HEADER_Q0_RETRY_SHIFT) & ASYNC_HEADER_Q0_RETRY_MASK;
+}
+
+static inline void async_header_set_tcode(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					  unsigned int tcode)
+{
+	header[0] &= ~ASYNC_HEADER_Q0_TCODE_MASK;
+	header[0] |= (((u32)tcode) << ASYNC_HEADER_Q0_TCODE_SHIFT) & ASYNC_HEADER_Q0_TCODE_MASK;
+}
+
+static inline void async_header_set_priority(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					     unsigned int priority)
+{
+	header[0] &= ~ASYNC_HEADER_Q0_PRIORITY_MASK;
+	header[0] |= (((u32)priority) << ASYNC_HEADER_Q0_PRIORITY_SHIFT) & ASYNC_HEADER_Q0_PRIORITY_MASK;
+}
+
+
+static inline void async_header_set_source(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					   unsigned int source)
+{
+	header[1] &= ~ASYNC_HEADER_Q1_SOURCE_MASK;
+	header[1] |= (((u32)source) << ASYNC_HEADER_Q1_SOURCE_SHIFT) & ASYNC_HEADER_Q1_SOURCE_MASK;
+}
+
+static inline void async_header_set_rcode(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					  unsigned int rcode)
+{
+	header[1] &= ~ASYNC_HEADER_Q1_RCODE_MASK;
+	header[1] |= (((u32)rcode) << ASYNC_HEADER_Q1_RCODE_SHIFT) & ASYNC_HEADER_Q1_RCODE_MASK;
+}
+
+static inline void async_header_set_offset(u32 header[ASYNC_HEADER_QUADLET_COUNT], u64 offset)
+{
+	u32 hi = (u32)(offset >> 32);
+	header[1] &= ~ASYNC_HEADER_Q1_OFFSET_HIGH_MASK;
+	header[1] |= (hi << ASYNC_HEADER_Q1_OFFSET_HIGH_SHIFT) & ASYNC_HEADER_Q1_OFFSET_HIGH_MASK;
+	header[2] = (u32)(offset & 0x00000000ffffffff);
+}
+
+static inline void async_header_set_quadlet_data(u32 header[ASYNC_HEADER_QUADLET_COUNT], u32 quadlet_data)
+{
+	header[3] = quadlet_data;
+}
+
+static inline void async_header_set_data_length(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						unsigned int data_length)
+{
+	header[3] &= ~ASYNC_HEADER_Q3_DATA_LENGTH_MASK;
+	header[3] |= (((u32)data_length) << ASYNC_HEADER_Q3_DATA_LENGTH_SHIFT) & ASYNC_HEADER_Q3_DATA_LENGTH_MASK;
+}
+
+static inline void async_header_set_extended_tcode(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						   unsigned int extended_tcode)
+{
+	header[3] &= ~ASYNC_HEADER_Q3_EXTENDED_TCODE_MASK;
+	header[3] |= (((u32)extended_tcode) << ASYNC_HEADER_Q3_EXTENDED_TCODE_SHIFT) & ASYNC_HEADER_Q3_EXTENDED_TCODE_MASK;
+}
+
+#define ISOC_HEADER_DATA_LENGTH_SHIFT		16
+#define ISOC_HEADER_DATA_LENGTH_MASK		0xffff0000
+#define ISOC_HEADER_TAG_SHIFT			14
+#define ISOC_HEADER_TAG_MASK			0x0000c000
+#define ISOC_HEADER_CHANNEL_SHIFT		8
+#define ISOC_HEADER_CHANNEL_MASK		0x00003f00
+#define ISOC_HEADER_TCODE_SHIFT			4
+#define ISOC_HEADER_TCODE_MASK			0x000000f0
+#define ISOC_HEADER_SY_SHIFT			0
+#define ISOC_HEADER_SY_MASK			0x0000000f
+
+static inline unsigned int isoc_header_get_data_length(u32 header)
+{
+	return (header & ISOC_HEADER_DATA_LENGTH_MASK) >> ISOC_HEADER_DATA_LENGTH_SHIFT;
+}
+
+static inline unsigned int isoc_header_get_tag(u32 header)
+{
+	return (header & ISOC_HEADER_TAG_MASK) >> ISOC_HEADER_TAG_SHIFT;
+}
+
+static inline unsigned int isoc_header_get_channel(u32 header)
+{
+	return (header & ISOC_HEADER_CHANNEL_MASK) >> ISOC_HEADER_CHANNEL_SHIFT;
+}
+
+static inline unsigned int isoc_header_get_tcode(u32 header)
+{
+	return (header & ISOC_HEADER_TCODE_MASK) >> ISOC_HEADER_TCODE_SHIFT;
+}
+
+static inline unsigned int isoc_header_get_sy(u32 header)
+{
+	return (header & ISOC_HEADER_SY_MASK) >> ISOC_HEADER_SY_SHIFT;
+}
+
+static inline void isoc_header_set_data_length(u32 *header, unsigned int data_length)
+{
+	*header &= ~ISOC_HEADER_DATA_LENGTH_MASK;
+	*header |= (((u32)data_length) << ISOC_HEADER_DATA_LENGTH_SHIFT) & ISOC_HEADER_DATA_LENGTH_MASK;
+}
+
+static inline void isoc_header_set_tag(u32 *header, unsigned int tag)
+{
+	*header &= ~ISOC_HEADER_TAG_MASK;
+	*header |= (((u32)tag) << ISOC_HEADER_TAG_SHIFT) & ISOC_HEADER_TAG_MASK;
+}
+
+static inline void isoc_header_set_channel(u32 *header, unsigned int channel)
+{
+	*header &= ~ISOC_HEADER_CHANNEL_MASK;
+	*header |= (((u32)channel) << ISOC_HEADER_CHANNEL_SHIFT) & ISOC_HEADER_CHANNEL_MASK;
+}
+
+static inline void isoc_header_set_tcode(u32 *header, unsigned int tcode)
+{
+	*header &= ~ISOC_HEADER_TCODE_MASK;
+	*header |= (((u32)tcode) << ISOC_HEADER_TCODE_SHIFT) & ISOC_HEADER_TCODE_MASK;
+}
+
+static inline void isoc_header_set_sy(u32 *header, unsigned int sy)
+{
+	*header &= ~ISOC_HEADER_SY_MASK;
+	*header |= (((u32)sy) << ISOC_HEADER_SY_SHIFT) & ISOC_HEADER_SY_MASK;
+}
+
+#endif // _FIREWIRE_PACKET_HEADER_DEFINITIONS_H
diff --git a/drivers/firewire/packet-serdes-test.c b/drivers/firewire/packet-serdes-test.c
new file mode 100644
index 000000000000..f93c966e794d
--- /dev/null
+++ b/drivers/firewire/packet-serdes-test.c
@@ -0,0 +1,582 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+//
+// packet-serdes-test.c - An application of Kunit to check serialization/deserialization of packets
+//			  defined by IEEE 1394.
+//
+// Copyright (c) 2024 Takashi Sakamoto
+
+#include <kunit/test.h>
+
+#include <linux/firewire-constants.h>
+
+#include "packet-header-definitions.h"
+
+static void serialize_async_header_common(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					  unsigned int dst_id, unsigned int tlabel,
+					  unsigned int retry, unsigned int tcode,
+					  unsigned int priority, unsigned int src_id)
+{
+	async_header_set_destination(header, dst_id);
+	async_header_set_tlabel(header, tlabel);
+	async_header_set_retry(header, retry);
+	async_header_set_tcode(header, tcode);
+	async_header_set_priority(header, priority);
+	async_header_set_source(header, src_id);
+}
+
+static void serialize_async_header_request(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					   unsigned int dst_id, unsigned int tlabel,
+					   unsigned int retry, unsigned int tcode,
+					   unsigned int priority, unsigned int src_id, u64 offset)
+{
+	serialize_async_header_common(header, dst_id, tlabel, retry, tcode, priority, src_id);
+	async_header_set_offset(header, offset);
+}
+
+static void serialize_async_header_quadlet_request(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						   unsigned int dst_id, unsigned int tlabel,
+						   unsigned int retry, unsigned int tcode,
+						   unsigned int priority, unsigned int src_id,
+						   u64 offset)
+{
+	serialize_async_header_request(header, dst_id, tlabel, retry, tcode, priority, src_id,
+				       offset);
+}
+
+static void serialize_async_header_block_request(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						 unsigned int dst_id, unsigned int tlabel,
+						 unsigned int retry, unsigned int tcode,
+						 unsigned int priority, unsigned int src_id,
+						 u64 offset, unsigned int data_length,
+						 unsigned int extended_tcode)
+{
+	serialize_async_header_request(header, dst_id, tlabel, retry, tcode, priority, src_id,
+				       offset);
+	async_header_set_data_length(header, data_length);
+	async_header_set_extended_tcode(header, extended_tcode);
+}
+
+static void serialize_async_header_response(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					    unsigned int dst_id, unsigned int tlabel,
+					    unsigned int retry, unsigned int tcode,
+					    unsigned int priority, unsigned int src_id,
+					    unsigned int rcode)
+{
+	serialize_async_header_common(header, dst_id, tlabel, retry, tcode, priority, src_id);
+	async_header_set_rcode(header, rcode);
+}
+
+static void serialize_async_header_quadlet_response(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						    unsigned int dst_id, unsigned int tlabel,
+						    unsigned int retry, unsigned int tcode,
+						    unsigned int priority, unsigned int src_id,
+						    unsigned int rcode)
+{
+	serialize_async_header_response(header, dst_id, tlabel, retry, tcode, priority, src_id,
+					rcode);
+}
+
+static void serialize_async_header_block_response(u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						  unsigned int dst_id, unsigned int tlabel,
+						  unsigned int retry, unsigned int tcode,
+						  unsigned int priority, unsigned int src_id,
+						  unsigned int rcode, unsigned int data_length,
+						  unsigned int extended_tcode)
+{
+	serialize_async_header_response(header, dst_id, tlabel, retry, tcode, priority, src_id,
+					rcode);
+	async_header_set_data_length(header, data_length);
+	async_header_set_extended_tcode(header, extended_tcode);
+}
+
+static void deserialize_async_header_common(const u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					    unsigned int *dst_id, unsigned int *tlabel,
+					    unsigned int *retry, unsigned int *tcode,
+					    unsigned int *priority, unsigned int *src_id)
+{
+	*dst_id = async_header_get_destination(header);
+	*tlabel = async_header_get_tlabel(header);
+	*retry = async_header_get_retry(header);
+	*tcode = async_header_get_tcode(header);
+	*priority = async_header_get_priority(header);
+	*src_id = async_header_get_source(header);
+}
+
+static void deserialize_async_header_request(const u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					     unsigned int *dst_id, unsigned int *tlabel,
+					     unsigned int *retry, unsigned int *tcode,
+					     unsigned int *priority, unsigned int *src_id,
+					     u64 *offset)
+{
+	deserialize_async_header_common(header, dst_id, tlabel, retry, tcode, priority, src_id);
+	*offset = async_header_get_offset(header);
+}
+
+static void deserialize_async_header_quadlet_request(const u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						     unsigned int *dst_id, unsigned int *tlabel,
+						     unsigned int *retry, unsigned int *tcode,
+						     unsigned int *priority, unsigned int *src_id,
+						     u64 *offset)
+{
+	deserialize_async_header_request(header, dst_id, tlabel, retry, tcode, priority, src_id,
+					 offset);
+}
+
+static void deserialize_async_header_block_request(const u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						   unsigned int *dst_id, unsigned int *tlabel,
+						   unsigned int *retry, unsigned int *tcode,
+						   unsigned int *priority, unsigned int *src_id,
+						   u64 *offset,
+						   unsigned int *data_length,
+						   unsigned int *extended_tcode)
+{
+	deserialize_async_header_request(header, dst_id, tlabel, retry, tcode, priority, src_id,
+					 offset);
+	*data_length = async_header_get_data_length(header);
+	*extended_tcode = async_header_get_extended_tcode(header);
+}
+
+static void deserialize_async_header_response(const u32 header[ASYNC_HEADER_QUADLET_COUNT],
+					      unsigned int *dst_id, unsigned int *tlabel,
+					      unsigned int *retry, unsigned int *tcode,
+					      unsigned int *priority, unsigned int *src_id,
+					      unsigned int *rcode)
+{
+	deserialize_async_header_common(header, dst_id, tlabel, retry, tcode, priority, src_id);
+	*rcode = async_header_get_rcode(header);
+}
+
+static void deserialize_async_header_quadlet_response(const u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						      unsigned int *dst_id, unsigned int *tlabel,
+						      unsigned int *retry, unsigned int *tcode,
+						      unsigned int *priority, unsigned int *src_id,
+						      unsigned int *rcode)
+{
+	deserialize_async_header_response(header, dst_id, tlabel, retry, tcode, priority, src_id, rcode);
+}
+
+static void deserialize_async_header_block_response(const u32 header[ASYNC_HEADER_QUADLET_COUNT],
+						    unsigned int *dst_id, unsigned int *tlabel,
+						    unsigned int *retry, unsigned int *tcode,
+						    unsigned int *priority, unsigned int *src_id,
+						    unsigned int *rcode, unsigned int *data_length,
+						    unsigned int *extended_tcode)
+{
+	deserialize_async_header_response(header, dst_id, tlabel, retry, tcode, priority, src_id, rcode);
+	*data_length = async_header_get_data_length(header);
+	*extended_tcode = async_header_get_extended_tcode(header);
+}
+
+static void serialize_isoc_header(u32 *header, unsigned int data_length, unsigned int tag,
+				  unsigned int channel, unsigned int tcode, unsigned int sy)
+{
+	isoc_header_set_data_length(header, data_length);
+	isoc_header_set_tag(header, tag);
+	isoc_header_set_channel(header, channel);
+	isoc_header_set_tcode(header, tcode);
+	isoc_header_set_sy(header, sy);
+}
+
+static void deserialize_isoc_header(u32 header, unsigned int *data_length, unsigned int *tag,
+				    unsigned int *channel, unsigned int *tcode, unsigned int *sy)
+{
+	*data_length = isoc_header_get_data_length(header);
+	*tag = isoc_header_get_tag(header);
+	*channel = isoc_header_get_channel(header);
+	*tcode = isoc_header_get_tcode(header);
+	*sy = isoc_header_get_sy(header);
+}
+
+static void test_async_header_write_quadlet_request(struct kunit *test)
+{
+	static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = {
+		0xffc05100,
+		0xffc1ffff,
+		0xf0000234,
+		0x1f0000c0,
+	};
+	u32 header[ASYNC_HEADER_QUADLET_COUNT] = {0, 0, 0, 0};
+
+	unsigned int dst_id;
+	unsigned int tlabel;
+	unsigned int retry;
+	unsigned int tcode;
+	unsigned int priority;
+	unsigned int src_id;
+	u64 offset;
+	u32 quadlet_data;
+
+	deserialize_async_header_quadlet_request(expected, &dst_id, &tlabel, &retry, &tcode,
+						 &priority, &src_id, &offset);
+	quadlet_data = async_header_get_quadlet_data(expected);
+
+	KUNIT_EXPECT_EQ(test, 0xffc0, dst_id);
+	KUNIT_EXPECT_EQ(test, 0x14, tlabel);
+	KUNIT_EXPECT_EQ(test, 0x01, retry);
+	KUNIT_EXPECT_EQ(test, TCODE_WRITE_QUADLET_REQUEST, tcode);
+	KUNIT_EXPECT_EQ(test, 0x00, priority);
+	KUNIT_EXPECT_EQ(test, 0xffc1, src_id);
+	KUNIT_EXPECT_EQ(test, 0xfffff0000234, offset);
+	KUNIT_EXPECT_EQ(test, 0x1f0000c0, quadlet_data);
+
+	serialize_async_header_quadlet_request(header, dst_id, tlabel, retry, tcode, priority,
+					       src_id, offset);
+	async_header_set_quadlet_data(header, quadlet_data);
+
+	KUNIT_EXPECT_MEMEQ(test, header, expected, sizeof(expected));
+}
+
+static void test_async_header_write_block_request(struct kunit *test)
+{
+	static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = {
+		0xffc06510,
+		0xffc1ecc0,
+		0x00000000,
+		0x00180000,
+	};
+	u32 header[ASYNC_HEADER_QUADLET_COUNT] = {0, 0, 0, 0};
+
+	unsigned int dst_id;
+	unsigned int tlabel;
+	unsigned int retry;
+	unsigned int tcode;
+	unsigned int priority;
+	unsigned int src_id;
+	u64 offset;
+	unsigned int data_length;
+	unsigned int extended_tcode;
+
+	deserialize_async_header_block_request(expected, &dst_id, &tlabel, &retry, &tcode,
+					       &priority, &src_id, &offset, &data_length,
+					       &extended_tcode);
+
+	KUNIT_EXPECT_EQ(test, 0xffc0, dst_id);
+	KUNIT_EXPECT_EQ(test, 0x19, tlabel);
+	KUNIT_EXPECT_EQ(test, 0x01, retry);
+	KUNIT_EXPECT_EQ(test, TCODE_WRITE_BLOCK_REQUEST, tcode);
+	KUNIT_EXPECT_EQ(test, 0x00, priority);
+	KUNIT_EXPECT_EQ(test, 0xffc1, src_id);
+	KUNIT_EXPECT_EQ(test, 0xecc000000000, offset);
+	KUNIT_EXPECT_EQ(test, 0x0018, data_length);
+	KUNIT_EXPECT_EQ(test, 0x0000, extended_tcode);
+
+	serialize_async_header_block_request(header, dst_id, tlabel, retry, tcode, priority, src_id,
+					     offset, data_length, extended_tcode);
+
+	KUNIT_EXPECT_MEMEQ(test, header, expected, sizeof(expected));
+}
+
+static void test_async_header_write_response(struct kunit *test)
+{
+	static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = {
+		0xffc15120,
+		0xffc00000,
+		0x00000000,
+		0x00000000,
+	};
+	u32 header[ASYNC_HEADER_QUADLET_COUNT] = {0, 0, 0, 0};
+
+	unsigned int dst_id;
+	unsigned int tlabel;
+	unsigned int retry;
+	unsigned int tcode;
+	unsigned int priority;
+	unsigned int src_id;
+	unsigned int rcode;
+
+	deserialize_async_header_quadlet_response(expected, &dst_id, &tlabel, &retry, &tcode,
+						  &priority, &src_id, &rcode);
+
+	KUNIT_EXPECT_EQ(test, 0xffc1, dst_id);
+	KUNIT_EXPECT_EQ(test, 0x14, tlabel);
+	KUNIT_EXPECT_EQ(test, 0x01, retry);
+	KUNIT_EXPECT_EQ(test, TCODE_WRITE_RESPONSE, tcode);
+	KUNIT_EXPECT_EQ(test, 0x00, priority);
+	KUNIT_EXPECT_EQ(test, 0xffc0, src_id);
+	KUNIT_EXPECT_EQ(test, RCODE_COMPLETE, rcode);
+
+	serialize_async_header_quadlet_response(header, dst_id, tlabel, retry, tcode, priority,
+						src_id, rcode);
+
+	KUNIT_EXPECT_MEMEQ(test, header, expected, sizeof(expected) - sizeof(expected[0]));
+}
+
+static void test_async_header_read_quadlet_request(struct kunit *test)
+{
+	static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = {
+		0xffc0f140,
+		0xffc1ffff,
+		0xf0000984,
+		0x00000000,
+	};
+	u32 header[ASYNC_HEADER_QUADLET_COUNT] = {0, 0, 0, 0};
+
+	unsigned int dst_id;
+	unsigned int tlabel;
+	unsigned int retry;
+	unsigned int tcode;
+	unsigned int priority;
+	unsigned int src_id;
+	u64 offset;
+
+	deserialize_async_header_quadlet_request(expected, &dst_id, &tlabel, &retry, &tcode,
+						 &priority, &src_id, &offset);
+
+	KUNIT_EXPECT_EQ(test, 0xffc0, dst_id);
+	KUNIT_EXPECT_EQ(test, 0x3c, tlabel);
+	KUNIT_EXPECT_EQ(test, 0x01, retry);
+	KUNIT_EXPECT_EQ(test, TCODE_READ_QUADLET_REQUEST, tcode);
+	KUNIT_EXPECT_EQ(test, 0x00, priority);
+	KUNIT_EXPECT_EQ(test, 0xffc1, src_id);
+	KUNIT_EXPECT_EQ(test, 0xfffff0000984, offset);
+
+	serialize_async_header_quadlet_request(header, dst_id, tlabel, retry, tcode, priority,
+					       src_id, offset);
+
+	KUNIT_EXPECT_MEMEQ(test, header, expected, sizeof(expected));
+}
+
+static void test_async_header_read_quadlet_response(struct kunit *test)
+{
+	static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = {
+		0xffc1f160,
+		0xffc00000,
+		0x00000000,
+		0x00000180,
+	};
+	u32 header[ASYNC_HEADER_QUADLET_COUNT] = {0, 0, 0, 0};
+
+	unsigned int dst_id;
+	unsigned int tlabel;
+	unsigned int retry;
+	unsigned int tcode;
+	unsigned int priority;
+	unsigned int src_id;
+	unsigned int rcode;
+	u32 quadlet_data;
+
+	deserialize_async_header_quadlet_response(expected, &dst_id, &tlabel, &retry, &tcode,
+						  &priority, &src_id, &rcode);
+	quadlet_data = async_header_get_quadlet_data(expected);
+
+	KUNIT_EXPECT_EQ(test, 0xffc1, dst_id);
+	KUNIT_EXPECT_EQ(test, 0x3c, tlabel);
+	KUNIT_EXPECT_EQ(test, 0x01, retry);
+	KUNIT_EXPECT_EQ(test, TCODE_READ_QUADLET_RESPONSE, tcode);
+	KUNIT_EXPECT_EQ(test, 0x00, priority);
+	KUNIT_EXPECT_EQ(test, 0xffc0, src_id);
+	KUNIT_EXPECT_EQ(test, RCODE_COMPLETE, rcode);
+	KUNIT_EXPECT_EQ(test, 0x00000180, quadlet_data);
+
+	serialize_async_header_quadlet_response(header, dst_id, tlabel, retry, tcode, priority,
+						src_id, rcode);
+	async_header_set_quadlet_data(header, quadlet_data);
+
+	KUNIT_EXPECT_MEMEQ(test, header, expected, sizeof(expected));
+}
+
+static void test_async_header_read_block_request(struct kunit *test)
+{
+	static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = {
+		0xffc0e150,
+		0xffc1ffff,
+		0xf0000400,
+		0x00200000,
+	};
+	u32 header[ASYNC_HEADER_QUADLET_COUNT] = {0, 0, 0, 0};
+
+	unsigned int dst_id;
+	unsigned int tlabel;
+	unsigned int retry;
+	unsigned int tcode;
+	unsigned int priority;
+	unsigned int src_id;
+	u64 offset;
+	unsigned int data_length;
+	unsigned int extended_tcode;
+
+	deserialize_async_header_block_request(expected, &dst_id, &tlabel, &retry, &tcode,
+					       &priority, &src_id, &offset, &data_length,
+					       &extended_tcode);
+
+	KUNIT_EXPECT_EQ(test, 0xffc0, dst_id);
+	KUNIT_EXPECT_EQ(test, 0x38, tlabel);
+	KUNIT_EXPECT_EQ(test, 0x01, retry);
+	KUNIT_EXPECT_EQ(test, TCODE_READ_BLOCK_REQUEST, tcode);
+	KUNIT_EXPECT_EQ(test, 0x00, priority);
+	KUNIT_EXPECT_EQ(test, 0xffc1, src_id);
+	KUNIT_EXPECT_EQ(test, 0xfffff0000400, offset);
+	KUNIT_EXPECT_EQ(test, 0x0020, data_length);
+	KUNIT_EXPECT_EQ(test, 0x0000, extended_tcode);
+
+	serialize_async_header_block_request(header, dst_id, tlabel, retry, tcode, priority, src_id,
+					     offset, data_length, extended_tcode);
+
+	KUNIT_EXPECT_MEMEQ(test, header, expected, sizeof(expected));
+}
+
+static void test_async_header_read_block_response(struct kunit *test)
+{
+	static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = {
+		0xffc1e170,
+		0xffc00000,
+		0x00000000,
+		0x00200000,
+	};
+	u32 header[ASYNC_HEADER_QUADLET_COUNT] = {0, 0, 0, 0};
+
+	unsigned int dst_id;
+	unsigned int tlabel;
+	unsigned int retry;
+	unsigned int tcode;
+	unsigned int priority;
+	unsigned int src_id;
+	unsigned int rcode;
+	unsigned int data_length;
+	unsigned int extended_tcode;
+
+	deserialize_async_header_block_response(expected, &dst_id, &tlabel, &retry, &tcode,
+						&priority, &src_id, &rcode, &data_length,
+						&extended_tcode);
+
+	KUNIT_EXPECT_EQ(test, 0xffc1, dst_id);
+	KUNIT_EXPECT_EQ(test, 0x38, tlabel);
+	KUNIT_EXPECT_EQ(test, 0x01, retry);
+	KUNIT_EXPECT_EQ(test, TCODE_READ_BLOCK_RESPONSE, tcode);
+	KUNIT_EXPECT_EQ(test, 0x00, priority);
+	KUNIT_EXPECT_EQ(test, 0xffc0, src_id);
+	KUNIT_EXPECT_EQ(test, RCODE_COMPLETE, rcode);
+	KUNIT_EXPECT_EQ(test, 0x0020, data_length);
+	KUNIT_EXPECT_EQ(test, 0x0000, extended_tcode);
+
+	serialize_async_header_block_response(header, dst_id, tlabel, retry, tcode, priority,
+					      src_id, rcode, data_length, extended_tcode);
+
+	KUNIT_EXPECT_MEMEQ(test, header, expected, sizeof(expected));
+}
+
+static void test_async_header_lock_request(struct kunit *test)
+{
+	static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = {
+		0xffc02d90,
+		0xffc1ffff,
+		0xf0000984,
+		0x00080002,
+	};
+	u32 header[ASYNC_HEADER_QUADLET_COUNT] = {0, 0, 0, 0};
+
+	unsigned int dst_id;
+	unsigned int tlabel;
+	unsigned int retry;
+	unsigned int tcode;
+	unsigned int priority;
+	unsigned int src_id;
+	u64 offset;
+	unsigned int data_length;
+	unsigned int extended_tcode;
+
+	deserialize_async_header_block_request(expected, &dst_id, &tlabel, &retry, &tcode,
+					       &priority, &src_id, &offset, &data_length,
+					       &extended_tcode);
+
+	KUNIT_EXPECT_EQ(test, 0xffc0, dst_id);
+	KUNIT_EXPECT_EQ(test, 0x0b, tlabel);
+	KUNIT_EXPECT_EQ(test, 0x01, retry);
+	KUNIT_EXPECT_EQ(test, TCODE_LOCK_REQUEST, tcode);
+	KUNIT_EXPECT_EQ(test, 0x00, priority);
+	KUNIT_EXPECT_EQ(test, 0xffc1, src_id);
+	KUNIT_EXPECT_EQ(test, 0xfffff0000984, offset);
+	KUNIT_EXPECT_EQ(test, 0x0008, data_length);
+	KUNIT_EXPECT_EQ(test, EXTCODE_COMPARE_SWAP, extended_tcode);
+
+	serialize_async_header_block_request(header, dst_id, tlabel, retry, tcode, priority, src_id,
+					     offset, data_length, extended_tcode);
+
+	KUNIT_EXPECT_MEMEQ(test, header, expected, sizeof(expected));
+}
+
+static void test_async_header_lock_response(struct kunit *test)
+{
+	static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = {
+		0xffc12db0,
+		0xffc00000,
+		0x00000000,
+		0x00040002,
+	};
+	u32 header[ASYNC_HEADER_QUADLET_COUNT] = {0, 0, 0, 0};
+
+	unsigned int dst_id;
+	unsigned int tlabel;
+	unsigned int retry;
+	unsigned int tcode;
+	unsigned int priority;
+	unsigned int src_id;
+	unsigned int rcode;
+	unsigned int data_length;
+	unsigned int extended_tcode;
+
+	deserialize_async_header_block_response(expected, &dst_id, &tlabel, &retry, &tcode,
+						&priority, &src_id, &rcode, &data_length,
+						&extended_tcode);
+
+	KUNIT_EXPECT_EQ(test, 0xffc1, dst_id);
+	KUNIT_EXPECT_EQ(test, 0x0b, tlabel);
+	KUNIT_EXPECT_EQ(test, 0x01, retry);
+	KUNIT_EXPECT_EQ(test, TCODE_LOCK_RESPONSE, tcode);
+	KUNIT_EXPECT_EQ(test, 0x00, priority);
+	KUNIT_EXPECT_EQ(test, 0xffc0, src_id);
+	KUNIT_EXPECT_EQ(test, RCODE_COMPLETE, rcode);
+	KUNIT_EXPECT_EQ(test, 0x0004, data_length);
+	KUNIT_EXPECT_EQ(test, EXTCODE_COMPARE_SWAP, extended_tcode);
+
+	serialize_async_header_block_response(header, dst_id, tlabel, retry, tcode, priority,
+					      src_id, rcode, data_length, extended_tcode);
+
+	KUNIT_EXPECT_MEMEQ(test, header, expected, sizeof(expected));
+}
+
+static void test_isoc_header(struct kunit *test)
+{
+	const u32 expected = 0x00d08dec;
+	u32 header = 0;
+
+	unsigned int data_length;
+	unsigned int tag;
+	unsigned int channel;
+	unsigned int tcode;
+	unsigned int sy;
+
+	deserialize_isoc_header(expected, &data_length, &tag, &channel, &tcode, &sy);
+
+	KUNIT_EXPECT_EQ(test, 0xd0, data_length);
+	KUNIT_EXPECT_EQ(test, 0x02, tag);
+	KUNIT_EXPECT_EQ(test, 0x0d, channel);
+	KUNIT_EXPECT_EQ(test, 0x0e, tcode);
+	KUNIT_EXPECT_EQ(test, 0x0c, sy);
+
+	serialize_isoc_header(&header, data_length, tag, channel, tcode, sy);
+
+	KUNIT_EXPECT_EQ(test, header, expected);
+}
+
+static struct kunit_case packet_serdes_test_cases[] = {
+	KUNIT_CASE(test_async_header_write_quadlet_request),
+	KUNIT_CASE(test_async_header_write_block_request),
+	KUNIT_CASE(test_async_header_write_response),
+	KUNIT_CASE(test_async_header_read_quadlet_request),
+	KUNIT_CASE(test_async_header_read_quadlet_response),
+	KUNIT_CASE(test_async_header_read_block_request),
+	KUNIT_CASE(test_async_header_read_block_response),
+	KUNIT_CASE(test_async_header_lock_request),
+	KUNIT_CASE(test_async_header_lock_response),
+	KUNIT_CASE(test_isoc_header),
+	{}
+};
+
+static struct kunit_suite packet_serdes_test_suite = {
+	.name = "firewire-packet-serdes",
+	.test_cases = packet_serdes_test_cases,
+};
+kunit_test_suite(packet_serdes_test_suite);
+
+MODULE_LICENSE("GPL");
diff --git a/include/linux/firewire.h b/include/linux/firewire.h
index dd9f2d765e68..00abe0e5d602 100644
--- a/include/linux/firewire.h
+++ b/include/linux/firewire.h
@@ -463,7 +463,8 @@ struct fw_iso_packet {
 	u32 tag:2;		/* tx: Tag in packet header		*/
 	u32 sy:4;		/* tx: Sy in packet header		*/
 	u32 header_length:8;	/* Length of immediate header		*/
-	u32 header[];		/* tx: Top of 1394 isoch. data_block	*/
+				/* tx: Top of 1394 isoch. data_block    */
+	u32 header[] __counted_by(header_length);
 };
 
 #define FW_ISO_CONTEXT_TRANSMIT			0
diff --git a/include/trace/events/firewire.h b/include/trace/events/firewire.h
new file mode 100644
index 000000000000..d695a560673f
--- /dev/null
+++ b/include/trace/events/firewire.h
@@ -0,0 +1,348 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Takashi Sakamoto
+
+#define TRACE_SYSTEM	firewire
+
+#if !defined(_FIREWIRE_TRACE_EVENT_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _FIREWIRE_TRACE_EVENT_H
+
+#include <linux/tracepoint.h>
+#include <linux/firewire.h>
+
+#include <linux/firewire-constants.h>
+
+#include "../../../drivers/firewire/packet-header-definitions.h"
+
+// The content of TP_printk field is preprocessed, then put to the module binary.
+#define ASYNC_HEADER_GET_DESTINATION(header)	\
+	(((header)[0] & ASYNC_HEADER_Q0_DESTINATION_MASK) >> ASYNC_HEADER_Q0_DESTINATION_SHIFT)
+
+#define ASYNC_HEADER_GET_TLABEL(header)	\
+	(((header)[0] & ASYNC_HEADER_Q0_TLABEL_MASK) >> ASYNC_HEADER_Q0_TLABEL_SHIFT)
+
+#define ASYNC_HEADER_GET_TCODE(header)	\
+	(((header)[0] & ASYNC_HEADER_Q0_TCODE_MASK) >> ASYNC_HEADER_Q0_TCODE_SHIFT)
+
+#define ASYNC_HEADER_GET_SOURCE(header)	\
+	(((header)[1] & ASYNC_HEADER_Q1_SOURCE_MASK) >> ASYNC_HEADER_Q1_SOURCE_SHIFT)
+
+#define ASYNC_HEADER_GET_OFFSET(header)	\
+	((((unsigned long long)((header)[1] & ASYNC_HEADER_Q1_OFFSET_HIGH_MASK)) >> ASYNC_HEADER_Q1_OFFSET_HIGH_SHIFT) << 32)| \
+	(header)[2]
+
+#define ASYNC_HEADER_GET_RCODE(header)	\
+	(((header)[1] & ASYNC_HEADER_Q1_RCODE_MASK) >> ASYNC_HEADER_Q1_RCODE_SHIFT)
+
+#define QUADLET_SIZE	4
+
+DECLARE_EVENT_CLASS(async_outbound_initiate_template,
+	TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, const u32 *header, const u32 *data, unsigned int data_count),
+	TP_ARGS(transaction, generation, scode, header, data, data_count),
+	TP_STRUCT__entry(
+		__field(u64, transaction)
+		__field(u8, generation)
+		__field(u8, scode)
+		__array(u32, header, ASYNC_HEADER_QUADLET_COUNT)
+		__dynamic_array(u32, data, data_count)
+	),
+	TP_fast_assign(
+		__entry->transaction = transaction;
+		__entry->generation = generation;
+		__entry->scode = scode;
+		memcpy(__entry->header, header, QUADLET_SIZE * ASYNC_HEADER_QUADLET_COUNT);
+		memcpy(__get_dynamic_array(data), data, __get_dynamic_array_len(data));
+	),
+	// This format is for the request subaction.
+	TP_printk(
+		"transaction=0x%llx generation=%u scode=%u dst_id=0x%04x tlabel=%u tcode=%u src_id=0x%04x offset=0x%012llx header=%s data=%s",
+		__entry->transaction,
+		__entry->generation,
+		__entry->scode,
+		ASYNC_HEADER_GET_DESTINATION(__entry->header),
+		ASYNC_HEADER_GET_TLABEL(__entry->header),
+		ASYNC_HEADER_GET_TCODE(__entry->header),
+		ASYNC_HEADER_GET_SOURCE(__entry->header),
+		ASYNC_HEADER_GET_OFFSET(__entry->header),
+		__print_array(__entry->header, ASYNC_HEADER_QUADLET_COUNT, QUADLET_SIZE),
+		__print_array(__get_dynamic_array(data),
+			      __get_dynamic_array_len(data) / QUADLET_SIZE, QUADLET_SIZE)
+	)
+);
+
+// The value of status is one of ack codes and rcodes specific to Linux FireWire subsystem.
+DECLARE_EVENT_CLASS(async_outbound_complete_template,
+	TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, unsigned int status, unsigned int timestamp),
+	TP_ARGS(transaction, generation, scode, status, timestamp),
+	TP_STRUCT__entry(
+		__field(u64, transaction)
+		__field(u8, generation)
+		__field(u8, scode)
+		__field(u8, status)
+		__field(u16, timestamp)
+	),
+	TP_fast_assign(
+		__entry->transaction = transaction;
+		__entry->generation = generation;
+		__entry->scode = scode;
+		__entry->status = status;
+		__entry->timestamp = timestamp;
+	),
+	TP_printk(
+		"transaction=0x%llx generation=%u scode=%u status=%u timestamp=0x%04x",
+		__entry->transaction,
+		__entry->generation,
+		__entry->scode,
+		__entry->status,
+		__entry->timestamp
+	)
+);
+
+// The value of status is one of ack codes and rcodes specific to Linux FireWire subsystem.
+DECLARE_EVENT_CLASS(async_inbound_template,
+	TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, unsigned int status, unsigned int timestamp, const u32 *header, const u32 *data, unsigned int data_count),
+	TP_ARGS(transaction, generation, scode, status, timestamp, header, data, data_count),
+	TP_STRUCT__entry(
+		__field(u64, transaction)
+		__field(u8, generation)
+		__field(u8, scode)
+		__field(u8, status)
+		__field(u16, timestamp)
+		__array(u32, header, ASYNC_HEADER_QUADLET_COUNT)
+		__dynamic_array(u32, data, data_count)
+	),
+	TP_fast_assign(
+		__entry->transaction = transaction;
+		__entry->generation = generation;
+		__entry->scode = scode;
+		__entry->status = status;
+		__entry->timestamp = timestamp;
+		memcpy(__entry->header, header, QUADLET_SIZE * ASYNC_HEADER_QUADLET_COUNT);
+		memcpy(__get_dynamic_array(data), data, __get_dynamic_array_len(data));
+	),
+	// This format is for the response subaction.
+	TP_printk(
+		"transaction=0x%llx generation=%u scode=%u status=%u timestamp=0x%04x dst_id=0x%04x tlabel=%u tcode=%u src_id=0x%04x rcode=%u header=%s data=%s",
+		__entry->transaction,
+		__entry->generation,
+		__entry->scode,
+		__entry->status,
+		__entry->timestamp,
+		ASYNC_HEADER_GET_DESTINATION(__entry->header),
+		ASYNC_HEADER_GET_TLABEL(__entry->header),
+		ASYNC_HEADER_GET_TCODE(__entry->header),
+		ASYNC_HEADER_GET_SOURCE(__entry->header),
+		ASYNC_HEADER_GET_RCODE(__entry->header),
+		__print_array(__entry->header, ASYNC_HEADER_QUADLET_COUNT, QUADLET_SIZE),
+		__print_array(__get_dynamic_array(data),
+			      __get_dynamic_array_len(data) / QUADLET_SIZE, QUADLET_SIZE)
+	)
+);
+
+DEFINE_EVENT(async_outbound_initiate_template, async_request_outbound_initiate,
+	TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, const u32 *header, const u32 *data, unsigned int data_count),
+	TP_ARGS(transaction, generation, scode, header, data, data_count)
+);
+
+DEFINE_EVENT(async_outbound_complete_template, async_request_outbound_complete,
+	TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, unsigned int status, unsigned int timestamp),
+	TP_ARGS(transaction, generation, scode, status, timestamp)
+);
+
+DEFINE_EVENT(async_inbound_template, async_response_inbound,
+	TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, unsigned int status, unsigned int timestamp, const u32 *header, const u32 *data, unsigned int data_count),
+	TP_ARGS(transaction, generation, scode, status, timestamp, header, data, data_count)
+);
+
+DEFINE_EVENT_PRINT(async_inbound_template, async_request_inbound,
+	TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, unsigned int status, unsigned int timestamp, const u32 *header, const u32 *data, unsigned int data_count),
+	TP_ARGS(transaction, generation, scode, status, timestamp, header, data, data_count),
+	TP_printk(
+		"transaction=0x%llx generation=%u scode=%u status=%u timestamp=0x%04x dst_id=0x%04x tlabel=%u tcode=%u src_id=0x%04x offset=0x%012llx header=%s data=%s",
+		__entry->transaction,
+		__entry->generation,
+		__entry->scode,
+		__entry->status,
+		__entry->timestamp,
+		ASYNC_HEADER_GET_DESTINATION(__entry->header),
+		ASYNC_HEADER_GET_TLABEL(__entry->header),
+		ASYNC_HEADER_GET_TCODE(__entry->header),
+		ASYNC_HEADER_GET_SOURCE(__entry->header),
+		ASYNC_HEADER_GET_OFFSET(__entry->header),
+		__print_array(__entry->header, ASYNC_HEADER_QUADLET_COUNT, QUADLET_SIZE),
+		__print_array(__get_dynamic_array(data),
+			      __get_dynamic_array_len(data) / QUADLET_SIZE, QUADLET_SIZE)
+	)
+);
+
+DEFINE_EVENT_PRINT(async_outbound_initiate_template, async_response_outbound_initiate,
+	TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, const u32 *header, const u32 *data, unsigned int data_count),
+	TP_ARGS(transaction, generation, scode, header, data, data_count),
+	TP_printk(
+		"transaction=0x%llx generation=%u scode=%u dst_id=0x%04x tlabel=%u tcode=%u src_id=0x%04x rcode=%u header=%s data=%s",
+		__entry->transaction,
+		__entry->generation,
+		__entry->scode,
+		ASYNC_HEADER_GET_DESTINATION(__entry->header),
+		ASYNC_HEADER_GET_TLABEL(__entry->header),
+		ASYNC_HEADER_GET_TCODE(__entry->header),
+		ASYNC_HEADER_GET_SOURCE(__entry->header),
+		ASYNC_HEADER_GET_RCODE(__entry->header),
+		__print_array(__entry->header, ASYNC_HEADER_QUADLET_COUNT, QUADLET_SIZE),
+		__print_array(__get_dynamic_array(data),
+			      __get_dynamic_array_len(data) / QUADLET_SIZE, QUADLET_SIZE)
+	)
+);
+
+DEFINE_EVENT(async_outbound_complete_template, async_response_outbound_complete,
+	TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, unsigned int status, unsigned int timestamp),
+	TP_ARGS(transaction, generation, scode, status, timestamp)
+);
+
+#undef ASYNC_HEADER_GET_DESTINATION
+#undef ASYNC_HEADER_GET_TLABEL
+#undef ASYNC_HEADER_GET_TCODE
+#undef ASYNC_HEADER_GET_SOURCE
+#undef ASYNC_HEADER_GET_OFFSET
+#undef ASYNC_HEADER_GET_RCODE
+
+TRACE_EVENT(async_phy_outbound_initiate,
+	TP_PROTO(u64 packet, unsigned int generation, u32 first_quadlet, u32 second_quadlet),
+	TP_ARGS(packet, generation, first_quadlet, second_quadlet),
+	TP_STRUCT__entry(
+		__field(u64, packet)
+		__field(u8, generation)
+		__field(u32, first_quadlet)
+		__field(u32, second_quadlet)
+	),
+	TP_fast_assign(
+		__entry->packet = packet;
+		__entry->generation = generation;
+		__entry->first_quadlet = first_quadlet;
+		__entry->second_quadlet = second_quadlet
+	),
+	TP_printk(
+		"packet=0x%llx generation=%u first_quadlet=0x%08x second_quadlet=0x%08x",
+		__entry->packet,
+		__entry->generation,
+		__entry->first_quadlet,
+		__entry->second_quadlet
+	)
+);
+
+TRACE_EVENT(async_phy_outbound_complete,
+	TP_PROTO(u64 packet, unsigned int generation, unsigned int status, unsigned int timestamp),
+	TP_ARGS(packet, generation, status, timestamp),
+	TP_STRUCT__entry(
+		__field(u64, packet)
+		__field(u8, generation)
+		__field(u8, status)
+		__field(u16, timestamp)
+	),
+	TP_fast_assign(
+		__entry->packet = packet;
+		__entry->generation = generation;
+		__entry->status = status;
+		__entry->timestamp = timestamp;
+	),
+	TP_printk(
+		"packet=0x%llx generation=%u status=%u timestamp=0x%04x",
+		__entry->packet,
+		__entry->generation,
+		__entry->status,
+		__entry->timestamp
+	)
+);
+
+TRACE_EVENT(async_phy_inbound,
+	TP_PROTO(u64 packet, unsigned int generation, unsigned int status, unsigned int timestamp, u32 first_quadlet, u32 second_quadlet),
+	TP_ARGS(packet, generation, status, timestamp, first_quadlet, second_quadlet),
+	TP_STRUCT__entry(
+		__field(u64, packet)
+		__field(u8, generation)
+		__field(u8, status)
+		__field(u16, timestamp)
+		__field(u32, first_quadlet)
+		__field(u32, second_quadlet)
+	),
+	TP_fast_assign(
+		__entry->packet = packet;
+		__entry->generation = generation;
+		__entry->status = status;
+		__entry->timestamp = timestamp;
+		__entry->first_quadlet = first_quadlet;
+		__entry->second_quadlet = second_quadlet
+	),
+	TP_printk(
+		"packet=0x%llx generation=%u status=%u timestamp=0x%04x first_quadlet=0x%08x second_quadlet=0x%08x",
+		__entry->packet,
+		__entry->generation,
+		__entry->status,
+		__entry->timestamp,
+		__entry->first_quadlet,
+		__entry->second_quadlet
+	)
+);
+
+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)
+);
+
+TRACE_EVENT(bus_reset_handle,
+	TP_PROTO(unsigned int generation, unsigned int node_id, bool bm_abdicate, u32 *self_ids, unsigned int self_id_count),
+	TP_ARGS(generation, node_id, bm_abdicate, self_ids, self_id_count),
+	TP_STRUCT__entry(
+		__field(u8, generation)
+		__field(u8, node_id)
+		__field(bool, bm_abdicate)
+		__dynamic_array(u32, self_ids, self_id_count)
+	),
+	TP_fast_assign(
+		__entry->generation = generation;
+		__entry->node_id = node_id;
+		__entry->bm_abdicate = bm_abdicate;
+		memcpy(__get_dynamic_array(self_ids), self_ids, __get_dynamic_array_len(self_ids));
+	),
+	TP_printk(
+		"generation=%u node_id=0x%04x bm_abdicate=%s self_ids=%s",
+		__entry->generation,
+		__entry->node_id,
+		__entry->bm_abdicate ? "true" : "false",
+		__print_array(__get_dynamic_array(self_ids),
+			      __get_dynamic_array_len(self_ids) / QUADLET_SIZE, QUADLET_SIZE)
+	)
+);
+
+#undef QUADLET_SIZE
+
+#endif // _FIREWIRE_TRACE_EVENT_H
+
+#include <trace/define_trace.h>