netdev - [PATCH v2 net-next 1/4] bnx2x: refactor nvram read procedure

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Message-ID: <1366280830-26034-2-git-send-email-dmitry@broadcom.com>
Date:	Thu, 18 Apr 2013 13:27:07 +0300
From:	"Dmitry Kravkov" <dmitry@...adcom.com>
To:	davem@...emloft.net, netdev@...r.kernel.org
cc:	"Dmitry Kravkov" <dmitry@...adcom.com>,
	"Francois Romieu" <romieu@...zoreil.com>,
	"Eilon Greenstein" <eilong@...adcom.com>
Subject: [PATCH v2 net-next 1/4] bnx2x: refactor nvram read procedure

introduce a procedure to read in u32 granularity.

CC: Francois Romieu <romieu@...zoreil.com>
Signed-off-by: Dmitry Kravkov <dmitry@...adcom.com>
Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
 .../net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c    | 54 +++++++++++++---------
 1 file changed, 31 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
index 129d6b2..e7e0ac1 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
@@ -1364,11 +1364,25 @@ static int bnx2x_nvram_read(struct bnx2x *bp, u32 offset, u8 *ret_buf,
 	return rc;
 }
 
+static int bnx2x_nvram_read32(struct bnx2x *bp, u32 offset, u32 *buf,
+			      int buf_size)
+{
+	int i, rc = bnx2x_nvram_read(bp, offset, (u8 *)buf, buf_size);
+	__be32 *be = (__be32 *)buf;
+
+	if (rc)
+		return rc;
+
+	for (i = 0; i < buf_size; i += 4)
+		*buf++ = be32_to_cpu(*be++);
+
+	return 0;
+}
+
 static int bnx2x_get_eeprom(struct net_device *dev,
 			    struct ethtool_eeprom *eeprom, u8 *eebuf)
 {
 	struct bnx2x *bp = netdev_priv(dev);
-	int rc;
 
 	if (!netif_running(dev)) {
 		DP(BNX2X_MSG_ETHTOOL  | BNX2X_MSG_NVM,
@@ -1383,9 +1397,7 @@ static int bnx2x_get_eeprom(struct net_device *dev,
 
 	/* parameters already validated in ethtool_get_eeprom */
 
-	rc = bnx2x_nvram_read(bp, eeprom->offset, eebuf, eeprom->len);
-
-	return rc;
+	return bnx2x_nvram_read(bp, eeprom->offset, eebuf, eeprom->len);
 }
 
 static int bnx2x_get_module_eeprom(struct net_device *dev,
@@ -1552,9 +1564,8 @@ static int bnx2x_nvram_write1(struct bnx2x *bp, u32 offset, u8 *data_buf,
 			      int buf_size)
 {
 	int rc;
-	u32 cmd_flags;
-	u32 align_offset;
-	__be32 val;
+	u32 cmd_flags, align_offset, val;
+	__be32 val_be;
 
 	if (offset + buf_size > bp->common.flash_size) {
 		DP(BNX2X_MSG_ETHTOOL | BNX2X_MSG_NVM,
@@ -1573,16 +1584,16 @@ static int bnx2x_nvram_write1(struct bnx2x *bp, u32 offset, u8 *data_buf,
 
 	cmd_flags = (MCPR_NVM_COMMAND_FIRST | MCPR_NVM_COMMAND_LAST);
 	align_offset = (offset & ~0x03);
-	rc = bnx2x_nvram_read_dword(bp, align_offset, &val, cmd_flags);
+	rc = bnx2x_nvram_read_dword(bp, align_offset, &val_be, cmd_flags);
 
-	if (rc == 0) {
-		val &= ~(0xff << BYTE_OFFSET(offset));
-		val |= (*data_buf << BYTE_OFFSET(offset));
+	/* nvram data is returned as an array of bytes
+	 * convert it back to cpu order
+	 */
+	val = be32_to_cpu(val_be);
 
-		/* nvram data is returned as an array of bytes
-		 * convert it back to cpu order
-		 */
-		val = be32_to_cpu(val);
+	if (rc == 0) {
+		val &= ~le32_to_cpu(0xff << BYTE_OFFSET(offset));
+		val |= le32_to_cpu(*data_buf << BYTE_OFFSET(offset));
 
 		rc = bnx2x_nvram_write_dword(bp, align_offset, val,
 					     cmd_flags);
@@ -2598,8 +2609,7 @@ static int bnx2x_test_nvram(struct bnx2x *bp)
 		{ 0x708,  0x70 }, /* manuf_key_info */
 		{     0,     0 }
 	};
-	__be32 *buf;
-	u8 *data;
+	u8 *buf;
 	int i, rc;
 	u32 magic, crc;
 
@@ -2612,26 +2622,24 @@ static int bnx2x_test_nvram(struct bnx2x *bp)
 		rc = -ENOMEM;
 		goto test_nvram_exit;
 	}
-	data = (u8 *)buf;
 
-	rc = bnx2x_nvram_read(bp, 0, data, 4);
+	rc = bnx2x_nvram_read32(bp, 0, &magic, sizeof(magic));
 	if (rc) {
 		DP(BNX2X_MSG_ETHTOOL | BNX2X_MSG_NVM,
 		   "magic value read (rc %d)\n", rc);
 		goto test_nvram_exit;
 	}
 
-	magic = be32_to_cpu(buf[0]);
 	if (magic != 0x669955aa) {
 		DP(BNX2X_MSG_ETHTOOL | BNX2X_MSG_NVM,
 		   "wrong magic value (0x%08x)\n", magic);
-		rc = -ENODEV;
+		rc = -EINVAL;
 		goto test_nvram_exit;
 	}
 
 	for (i = 0; nvram_tbl[i].size; i++) {
 
-		rc = bnx2x_nvram_read(bp, nvram_tbl[i].offset, data,
+		rc = bnx2x_nvram_read(bp, nvram_tbl[i].offset, buf,
 				      nvram_tbl[i].size);
 		if (rc) {
 			DP(BNX2X_MSG_ETHTOOL | BNX2X_MSG_NVM,
@@ -2639,7 +2647,7 @@ static int bnx2x_test_nvram(struct bnx2x *bp)
 			goto test_nvram_exit;
 		}
 
-		crc = ether_crc_le(nvram_tbl[i].size, data);
+		crc = ether_crc_le(nvram_tbl[i].size, buf);
 		if (crc != CRC32_RESIDUAL) {
 			DP(BNX2X_MSG_ETHTOOL | BNX2X_MSG_NVM,
 			   "nvram_tbl[%d] wrong crc value (0x%08x)\n", i, crc);
-- 
1.8.1.4


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