target/linux/ixp4xx/patches-2.6.30/304-ixp4xx_eth_jumboframe.patch

   1 --- a/drivers/net/arm/ixp4xx_eth.c
   2 +++ b/drivers/net/arm/ixp4xx_eth.c
   3 @@ -52,7 +52,7 @@
   4
   5  #define POOL_ALLOC_SIZE                (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
   6  #define REGS_SIZE              0x1000
   7 -#define MAX_MRU                        1536 /* 0x600 */
   8 +#define MAX_MRU                        16384
   9  #define RX_BUFF_SIZE           ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
  10
  11  #define NAPI_WEIGHT            16
  12 @@ -1066,6 +1066,30 @@ static void destroy_queues(struct port *
  13         }
  14  }
  15
  16 +static int eth_do_change_mtu(struct net_device *dev, int mtu)
  17 +{
  18 +       struct port *port;
  19 +       struct msg msg;
  20 +
  21 +       port = netdev_priv(dev);
  22 +
  23 +       memset(&msg, 0, sizeof(msg));
  24 +       msg.cmd = NPE_SETMAXFRAMELENGTHS;
  25 +       msg.eth_id = port->id;
  26 +
  27 +       /* max rx/tx 64 byte blocks */
  28 +       msg.byte2 = ((mtu + 63) / 64) << 8;
  29 +       msg.byte3 = ((mtu + 63) / 64) << 8;
  30 +
  31 +       msg.byte4 = msg.byte6 = mtu >> 8;
  32 +       msg.byte5 = msg.byte7 = mtu & 0xff;
  33 +
  34 +       if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAX_FRAME_LENGTH"))
  35 +               return -EIO;
  36 +
  37 +       return 0;
  38 +}
  39 +
  40  static int eth_open(struct net_device *dev)
  41  {
  42         struct port *port = netdev_priv(dev);
  43 @@ -1117,6 +1141,8 @@ static int eth_open(struct net_device *d
  44         if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
  45                 return -EIO;
  46
  47 +       eth_do_change_mtu(dev, dev->mtu);
  48 +
  49         if ((err = request_queues(port)) != 0)
  50                 return err;
  51
  52 @@ -1256,7 +1282,26 @@ static int eth_close(struct net_device *
  53         return 0;
  54  }
  55
  56 +static int ixp_eth_change_mtu(struct net_device *dev, int mtu)
  57 +{
  58 +       int ret;
  59 +
  60 +       if (mtu > MAX_MRU)
  61 +               return -EINVAL;
  62 +
  63 +       if (dev->flags & IFF_UP) {
  64 +               ret = eth_do_change_mtu(dev, mtu);
  65 +               if (ret < 0)
  66 +                       return ret;
  67 +       }
  68 +
  69 +       dev->mtu = mtu;
  70 +
  71 +       return 0;
  72 +}
  73 +
  74  static const struct net_device_ops ixp4xx_netdev_ops = {
  75 +       .ndo_change_mtu = ixp_eth_change_mtu,
  76         .ndo_open = eth_open,
  77         .ndo_stop = eth_close,
  78         .ndo_start_xmit = eth_xmit,