linux-kernel - [RFC PATCH 03/13] firewire: ohci: replace local macros with common inline functions for asynchronous packet header

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Date: Thu, 18 Apr 2024 18:22:53 +0900
From: Takashi Sakamoto <o-takashi@...amocchi.jp>
To: linux1394-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org
Subject: [RFC PATCH 03/13] firewire: ohci: replace local macros with common inline functions for asynchronous packet header

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

Signed-off-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
---
 drivers/firewire/ohci.c | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 38d19410a2be..5254cf5c2e58 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)
@@ -1550,21 +1551,15 @@ 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 void handle_local_rom(struct fw_ohci *ohci,
 			     struct fw_packet *packet, u32 csr)
 {
 	struct fw_packet response;
 	int tcode, length, i;
 
-	tcode = HEADER_GET_TCODE(packet->header[0]);
+	tcode = async_header_get_tcode(packet->header);
 	if (TCODE_IS_BLOCK_PACKET(tcode))
-		length = HEADER_GET_DATA_LENGTH(packet->header[3]);
+		length = async_header_get_data_length(packet->header);
 	else
 		length = 4;
 
@@ -1591,10 +1586,10 @@ 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) {
@@ -1640,10 +1635,7 @@ 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. */
@@ -1679,7 +1671,7 @@ 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);
 
-- 
2.43.0