ixp4xx: add support for jumbo frames to the ethernet driver

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17083 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ixp4xx/patches-2.6.28/304-ixp4xx_eth_jumboframe.patch b/target/linux/ixp4xx/patches-2.6.28/304-ixp4xx_eth_jumboframe.patch
new file mode 100644 (file)
index 0000000..ba2ac84
--- /dev/null
+++ b/target/linux/ixp4xx/patches-2.6.28/304-ixp4xx_eth_jumboframe.patch
@@ -0,0 +1,84 @@
+--- a/drivers/net/arm/ixp4xx_eth.c
++++ b/drivers/net/arm/ixp4xx_eth.c
+@@ -54,7 +54,7 @@
+ 
+ #define POOL_ALLOC_SIZE               (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
+ #define REGS_SIZE             0x1000
+-#define MAX_MRU                       1536 /* 0x600 */
++#define MAX_MRU                       16384
+ #define RX_BUFF_SIZE          ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
+ 
+ #define NAPI_WEIGHT           16
+@@ -1011,6 +1011,30 @@ static void destroy_queues(struct port *
+       }
+ }
+ 
++static int eth_do_change_mtu(struct net_device *dev, int mtu)
++{
++      struct port *port;
++      struct msg msg;
++
++      port = netdev_priv(dev);
++
++      memset(&msg, 0, sizeof(msg));
++      msg.cmd = NPE_SETMAXFRAMELENGTHS;
++      msg.eth_id = port->id;
++
++      /* max rx/tx 64 byte blocks */
++      msg.byte2 = ((mtu + 63) / 64) << 8;
++      msg.byte3 = ((mtu + 63) / 64) << 8;
++
++      msg.byte4 = msg.byte6 = mtu >> 8;
++      msg.byte5 = msg.byte7 = mtu & 0xff;
++
++      if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAX_FRAME_LENGTH"))
++              return -EIO;
++
++      return 0;
++}
++
+ static int eth_open(struct net_device *dev)
+ {
+       struct port *port = netdev_priv(dev);
+@@ -1061,6 +1085,8 @@ static int eth_open(struct net_device *d
+       if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
+               return -EIO;
+ 
++      eth_do_change_mtu(dev, dev->mtu);
++
+       if ((err = request_queues(port)) != 0)
+               return err;
+ 
+@@ -1238,6 +1264,24 @@ static void eth_init_mii(struct net_devi
+ 
+ }
+ 
++static int eth_change_mtu(struct net_device *dev, int mtu)
++{
++      int ret;
++
++      if (mtu > MAX_MRU)
++              return -EINVAL;
++
++      if (dev->flags & IFF_UP) {
++              ret = eth_do_change_mtu(dev, mtu);
++              if (ret < 0)
++                      return ret;
++      }
++
++      dev->mtu = mtu;
++
++      return 0;
++}
++
+ static int __devinit eth_init_one(struct platform_device *pdev)
+ {
+       struct port *port;
+@@ -1272,6 +1316,7 @@ static int __devinit eth_init_one(struct
+               goto err_free;
+       }
+ 
++      dev->change_mtu = eth_change_mtu;
+       dev->open = eth_open;
+       dev->hard_start_xmit = eth_xmit;
+       dev->stop = eth_close;

diff --git a/target/linux/ixp4xx/patches-2.6.30/304-ixp4xx_eth_jumboframe.patch b/target/linux/ixp4xx/patches-2.6.30/304-ixp4xx_eth_jumboframe.patch
new file mode 100644 (file)
index 0000000..21e8f45
--- /dev/null
+++ b/target/linux/ixp4xx/patches-2.6.30/304-ixp4xx_eth_jumboframe.patch
@@ -0,0 +1,78 @@
+--- a/drivers/net/arm/ixp4xx_eth.c
++++ b/drivers/net/arm/ixp4xx_eth.c
+@@ -52,7 +52,7 @@
+ 
+ #define POOL_ALLOC_SIZE               (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
+ #define REGS_SIZE             0x1000
+-#define MAX_MRU                       1536 /* 0x600 */
++#define MAX_MRU                       16384
+ #define RX_BUFF_SIZE          ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
+ 
+ #define NAPI_WEIGHT           16
+@@ -1066,6 +1066,30 @@ static void destroy_queues(struct port *
+       }
+ }
+ 
++static int eth_do_change_mtu(struct net_device *dev, int mtu)
++{
++      struct port *port;
++      struct msg msg;
++
++      port = netdev_priv(dev);
++
++      memset(&msg, 0, sizeof(msg));
++      msg.cmd = NPE_SETMAXFRAMELENGTHS;
++      msg.eth_id = port->id;
++
++      /* max rx/tx 64 byte blocks */
++      msg.byte2 = ((mtu + 63) / 64) << 8;
++      msg.byte3 = ((mtu + 63) / 64) << 8;
++
++      msg.byte4 = msg.byte6 = mtu >> 8;
++      msg.byte5 = msg.byte7 = mtu & 0xff;
++
++      if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAX_FRAME_LENGTH"))
++              return -EIO;
++
++      return 0;
++}
++
+ static int eth_open(struct net_device *dev)
+ {
+       struct port *port = netdev_priv(dev);
+@@ -1117,6 +1141,8 @@ static int eth_open(struct net_device *d
+       if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
+               return -EIO;
+ 
++      eth_do_change_mtu(dev, dev->mtu);
++
+       if ((err = request_queues(port)) != 0)
+               return err;
+ 
+@@ -1256,7 +1282,26 @@ static int eth_close(struct net_device *
+       return 0;
+ }
+ 
++static int ixp_eth_change_mtu(struct net_device *dev, int mtu)
++{
++      int ret;
++
++      if (mtu > MAX_MRU)
++              return -EINVAL;
++
++      if (dev->flags & IFF_UP) {
++              ret = eth_do_change_mtu(dev, mtu);
++              if (ret < 0)
++                      return ret;
++      }
++
++      dev->mtu = mtu;
++
++      return 0;
++}
++
+ static const struct net_device_ops ixp4xx_netdev_ops = {
++      .ndo_change_mtu = ixp_eth_change_mtu,
+       .ndo_open = eth_open,
+       .ndo_stop = eth_close,
+       .ndo_start_xmit = eth_xmit,