[RFC PATCH 02/13] firewire: core: replace local macros with common inline functions for asynchronous packet header

From: Takashi Sakamoto
Date: Thu Apr 18 2024 - 05:23:31 EST

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This commit uses common inline functions to serialize and deserialize
header for asynchronous packet.

Signed-off-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>
---
drivers/firewire/core-transaction.c | 138 +++++++++++-----------------
1 file changed, 56 insertions(+), 82 deletions(-)

diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index 130b95aca629..01ce07f87452 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -29,29 +29,13 @@
#include <asm/byteorder.h>

#include "core.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
@@ -248,28 +232,24 @@ 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 +261,8 @@ 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;
@@ -655,7 +634,7 @@ 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;
@@ -695,7 +674,7 @@ 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 +685,12 @@ 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 +710,42 @@ 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]);
-
- 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;
+ tcode = async_header_get_tcode(request_header);
+ tlabel = async_header_get_tlabel(request_header);
+ source = async_header_get_source(request_header);
+ destination = async_header_get_destination(request_header);
+ extended_tcode = async_header_get_extended_tcode(request_header);
+
+ 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 +782,7 @@ 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 +792,7 @@ 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 +802,7 @@ 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:
@@ -872,7 +847,7 @@ void fw_send_response(struct fw_card *card,
{
/* 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;
}
@@ -926,11 +901,11 @@ 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 +938,9 @@ 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) {
@@ -997,7 +972,7 @@ void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
return;

- if (TCODE_IS_LINK_INTERNAL(HEADER_GET_TCODE(p->header[0]))) {
+ if (TCODE_IS_LINK_INTERNAL(async_header_get_tcode(p->header))) {
fw_cdev_handle_phy_packet(card, p);
return;
}
@@ -1008,8 +983,7 @@ 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];
+ 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 +1001,10 @@ 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);

spin_lock_irqsave(&card->lock, flags);
list_for_each_entry(iter, &card->transaction_list, link) {
@@ -1073,7 +1047,7 @@ void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
case TCODE_READ_BLOCK_RESPONSE:
case TCODE_LOCK_RESPONSE:
data = p->payload;
- data_length = HEADER_GET_DATA_LENGTH(p->header[3]);
+ data_length = async_header_get_data_length(p->header);
break;

default:
--
2.43.0

Next message: Takashi Sakamoto: "[RFC PATCH 03/13] firewire: ohci: replace local macros with common inline functions for asynchronous packet header"
Previous message: Takashi Sakamoto: "[RFC PATCH 01/13] firewire: core: add common inline functions to serialize/deserialize asynchronous packet header"
In reply to: Takashi Sakamoto: "[RFC PATCH 01/13] firewire: core: add common inline functions to serialize/deserialize asynchronous packet header"
Next in thread: Takashi Sakamoto: "[RFC PATCH 03/13] firewire: ohci: replace local macros with common inline functions for asynchronous packet header"
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