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Re: [PATCH 2/2] mv643xx_eth: Place explicit port number in mv643xx_eth_p

To: Jeff Garzik <jgarzik@pobox.com>
Subject: Re: [PATCH 2/2] mv643xx_eth: Place explicit port number in mv643xx_eth_platform_data
From: "Dale Farnsworth" <dale@farnsworth.org>
Date: Wed, 28 Feb 2007 15:47:10 -0700
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-mips@linux-mips.org, Ralf Baechle <ralf@linux-mips.org>
In-reply-to: <20070228224031.GA8233@xyzzy.farnsworth.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20070228224031.GA8233@xyzzy.farnsworth.org>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.13 (2006-08-11)
We had been using the platform_device.id field to identify which ethernet
port is used for mv643xx_eth device.  This is not correct in general.
It will be incorrect, for example, if a hardware platform uses a single
port but not the first port.  Here, we add an explicit port_number field
to struct mv643xx_eth_platform_data.

This makes the mv643xx_eth_platform_data structure required, but that
isn't an issue since all users currently provide it already.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>

diff --git a/arch/mips/momentum/jaguar_atx/platform.c 
b/arch/mips/momentum/jaguar_atx/platform.c
Index: b/arch/mips/momentum/jaguar_atx/platform.c
===================================================================
--- a/arch/mips/momentum/jaguar_atx/platform.c
+++ b/arch/mips/momentum/jaguar_atx/platform.c
@@ -48,6 +48,8 @@ static struct resource mv64x60_eth0_reso
 };
 
 static struct mv643xx_eth_platform_data eth0_pd = {
+       .port_number    = 0,
+
        .tx_sram_addr   = MV_SRAM_BASE_ETH0,
        .tx_sram_size   = MV_SRAM_TXRING_SIZE,
        .tx_queue_size  = MV_SRAM_TXRING_SIZE / 16,
@@ -77,6 +79,8 @@ static struct resource mv64x60_eth1_reso
 };
 
 static struct mv643xx_eth_platform_data eth1_pd = {
+       .port_number    = 1,
+
        .tx_sram_addr   = MV_SRAM_BASE_ETH1,
        .tx_sram_size   = MV_SRAM_TXRING_SIZE,
        .tx_queue_size  = MV_SRAM_TXRING_SIZE / 16,
@@ -105,7 +109,9 @@ static struct resource mv64x60_eth2_reso
        },
 };
 
-static struct mv643xx_eth_platform_data eth2_pd;
+static struct mv643xx_eth_platform_data eth2_pd = {
+       .port_number    = 2,
+};
 
 static struct platform_device eth2_device = {
        .name           = MV643XX_ETH_NAME,
Index: b/arch/mips/momentum/ocelot_3/platform.c
===================================================================
--- a/arch/mips/momentum/ocelot_3/platform.c
+++ b/arch/mips/momentum/ocelot_3/platform.c
@@ -48,6 +48,8 @@ static struct resource mv64x60_eth0_reso
 };
 
 static struct mv643xx_eth_platform_data eth0_pd = {
+       .port_number    = 0,
+
        .tx_sram_addr   = MV_SRAM_BASE_ETH0,
        .tx_sram_size   = MV_SRAM_TXRING_SIZE,
        .tx_queue_size  = MV_SRAM_TXRING_SIZE / 16,
@@ -77,6 +79,8 @@ static struct resource mv64x60_eth1_reso
 };
 
 static struct mv643xx_eth_platform_data eth1_pd = {
+       .port_number    = 1,
+
        .tx_sram_addr   = MV_SRAM_BASE_ETH1,
        .tx_sram_size   = MV_SRAM_TXRING_SIZE,
        .tx_queue_size  = MV_SRAM_TXRING_SIZE / 16,
@@ -105,7 +109,9 @@ static struct resource mv64x60_eth2_reso
        },
 };
 
-static struct mv643xx_eth_platform_data eth2_pd;
+static struct mv643xx_eth_platform_data eth2_pd = {
+       .port_number    = 2,
+};
 
 static struct platform_device eth2_device = {
        .name           = MV643XX_ETH_NAME,
Index: b/arch/mips/momentum/ocelot_c/platform.c
===================================================================
--- a/arch/mips/momentum/ocelot_c/platform.c
+++ b/arch/mips/momentum/ocelot_c/platform.c
@@ -47,6 +47,8 @@ static struct resource mv64x60_eth0_reso
 };
 
 static struct mv643xx_eth_platform_data eth0_pd = {
+       .port_number    = 0,
+
        .tx_sram_addr   = MV_SRAM_BASE_ETH0,
        .tx_sram_size   = MV_SRAM_TXRING_SIZE,
        .tx_queue_size  = MV_SRAM_TXRING_SIZE / 16,
@@ -76,6 +78,8 @@ static struct resource mv64x60_eth1_reso
 };
 
 static struct mv643xx_eth_platform_data eth1_pd = {
+       .port_number    = 1,
+
        .tx_sram_addr   = MV_SRAM_BASE_ETH1,
        .tx_sram_size   = MV_SRAM_TXRING_SIZE,
        .tx_queue_size  = MV_SRAM_TXRING_SIZE / 16,
Index: b/arch/powerpc/platforms/chrp/pegasos_eth.c
===================================================================
--- a/arch/powerpc/platforms/chrp/pegasos_eth.c
+++ b/arch/powerpc/platforms/chrp/pegasos_eth.c
@@ -58,6 +58,7 @@ static struct resource mv643xx_eth0_reso
 
 
 static struct mv643xx_eth_platform_data eth0_pd = {
+       .port_number    = 0,
        .tx_sram_addr = PEGASOS2_SRAM_BASE_ETH0,
        .tx_sram_size = PEGASOS2_SRAM_TXRING_SIZE,
        .tx_queue_size = PEGASOS2_SRAM_TXRING_SIZE/16,
@@ -87,6 +88,7 @@ static struct resource mv643xx_eth1_reso
 };
 
 static struct mv643xx_eth_platform_data eth1_pd = {
+       .port_number    = 1,
        .tx_sram_addr = PEGASOS2_SRAM_BASE_ETH1,
        .tx_sram_size = PEGASOS2_SRAM_TXRING_SIZE,
        .tx_queue_size = PEGASOS2_SRAM_TXRING_SIZE/16,
Index: b/arch/ppc/syslib/mv64x60.c
===================================================================
--- a/arch/ppc/syslib/mv64x60.c
+++ b/arch/ppc/syslib/mv64x60.c
@@ -339,7 +339,9 @@ static struct resource mv64x60_eth0_reso
        },
 };
 
-static struct mv643xx_eth_platform_data eth0_pd;
+static struct mv643xx_eth_platform_data eth0_pd = {
+       .port_number    = 0,
+};
 
 static struct platform_device eth0_device = {
        .name           = MV643XX_ETH_NAME,
@@ -362,7 +364,9 @@ static struct resource mv64x60_eth1_reso
        },
 };
 
-static struct mv643xx_eth_platform_data eth1_pd;
+static struct mv643xx_eth_platform_data eth1_pd = {
+       .port_number    = 1,
+};
 
 static struct platform_device eth1_device = {
        .name           = MV643XX_ETH_NAME,
@@ -385,7 +389,9 @@ static struct resource mv64x60_eth2_reso
        },
 };
 
-static struct mv643xx_eth_platform_data eth2_pd;
+static struct mv643xx_eth_platform_data eth2_pd = {
+       .port_number    = 2,
+};
 
 static struct platform_device eth2_device = {
        .name           = MV643XX_ETH_NAME,
Index: b/drivers/net/mv643xx_eth.c
===================================================================
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -1309,7 +1309,7 @@ static void mv643xx_init_ethtool_cmd(str
 static int mv643xx_eth_probe(struct platform_device *pdev)
 {
        struct mv643xx_eth_platform_data *pd;
-       int port_num = pdev->id;
+       int port_num;
        struct mv643xx_private *mp;
        struct net_device *dev;
        u8 *p;
@@ -1318,6 +1318,13 @@ static int mv643xx_eth_probe(struct plat
        struct ethtool_cmd cmd;
        int duplex = DUPLEX_HALF;
        int speed = 0;                  /* default to auto-negotiation */
+       static u8 zero_mac_addr[6] = { 0 };
+
+       pd = pdev->dev.platform_data;
+       if (pd == NULL) {
+               printk(KERN_ERR "No mv643xx_eth_platform_data\n");
+               return -ENODEV;
+       }
 
        dev = alloc_etherdev(sizeof(struct mv643xx_private));
        if (!dev)
@@ -1331,8 +1338,6 @@ static int mv643xx_eth_probe(struct plat
        BUG_ON(!res);
        dev->irq = res->start;
 
-       mp->port_num = port_num;
-
        dev->open = mv643xx_eth_open;
        dev->stop = mv643xx_eth_stop;
        dev->hard_start_xmit = mv643xx_eth_start_xmit;
@@ -1373,40 +1378,39 @@ static int mv643xx_eth_probe(struct plat
 
        spin_lock_init(&mp->lock);
 
+       port_num = pd->port_number;
+
        /* set default config values */
        eth_port_uc_addr_get(dev, dev->dev_addr);
        mp->rx_ring_size = MV643XX_ETH_PORT_DEFAULT_RECEIVE_QUEUE_SIZE;
        mp->tx_ring_size = MV643XX_ETH_PORT_DEFAULT_TRANSMIT_QUEUE_SIZE;
 
-       pd = pdev->dev.platform_data;
-       if (pd) {
-               static u8 zero_mac_addr[6] = { 0 };
+       if (memcmp(pd->mac_addr, zero_mac_addr, 6) != 0)
+               memcpy(dev->dev_addr, pd->mac_addr, 6);
 
-               if (memcmp(pd->mac_addr, zero_mac_addr, 6) != 0)
-                       memcpy(dev->dev_addr, pd->mac_addr, 6);
+       if (pd->phy_addr || pd->force_phy_addr)
+               ethernet_phy_set(port_num, pd->phy_addr);
 
-               if (pd->phy_addr || pd->force_phy_addr)
-                       ethernet_phy_set(port_num, pd->phy_addr);
+       if (pd->rx_queue_size)
+               mp->rx_ring_size = pd->rx_queue_size;
 
-               if (pd->rx_queue_size)
-                       mp->rx_ring_size = pd->rx_queue_size;
+       if (pd->tx_queue_size)
+               mp->tx_ring_size = pd->tx_queue_size;
 
-               if (pd->tx_queue_size)
-                       mp->tx_ring_size = pd->tx_queue_size;
+       if (pd->tx_sram_size) {
+               mp->tx_sram_size = pd->tx_sram_size;
+               mp->tx_sram_addr = pd->tx_sram_addr;
+       }
 
-               if (pd->tx_sram_size) {
-                       mp->tx_sram_size = pd->tx_sram_size;
-                       mp->tx_sram_addr = pd->tx_sram_addr;
-               }
+       if (pd->rx_sram_size) {
+               mp->rx_sram_size = pd->rx_sram_size;
+               mp->rx_sram_addr = pd->rx_sram_addr;
+       }
 
-               if (pd->rx_sram_size) {
-                       mp->rx_sram_size = pd->rx_sram_size;
-                       mp->rx_sram_addr = pd->rx_sram_addr;
-               }
+       duplex = pd->duplex;
+       speed = pd->speed;
 
-               duplex = pd->duplex;
-               speed = pd->speed;
-       }
+       mp->port_num = port_num;
 
        /* Hook up MII support for ethtool */
        mp->mii.dev = dev;
Index: b/include/linux/mv643xx.h
===================================================================
--- a/include/linux/mv643xx.h
+++ b/include/linux/mv643xx.h
@@ -1289,6 +1289,7 @@ struct mv64xxx_i2c_pdata {
 #define MV643XX_ETH_NAME       "mv643xx_eth"
 
 struct mv643xx_eth_platform_data {
+       int             port_number;
        u16             force_phy_addr; /* force override if phy_addr == 0 */
        u16             phy_addr;
 

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