target/linux/ixp4xx/patches-2.6.31/304-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                        (14320 - ETH_HLEN - ETH_FCS_LEN)
   9  #define RX_BUFF_SIZE           ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
  10
  11  #define NAPI_WEIGHT            16
  12 @@ -1061,6 +1061,32 @@ 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 +       /* adjust for ethernet headers */
  21 +       int framesize = mtu + ETH_HLEN + ETH_FCS_LEN;
  22 +
  23 +       port = netdev_priv(dev);
  24 +
  25 +       memset(&msg, 0, sizeof(msg));
  26 +       msg.cmd = NPE_SETMAXFRAMELENGTHS;
  27 +       msg.eth_id = port->id;
  28 +
  29 +       /* max rx/tx 64 byte blocks */
  30 +       msg.byte2 = ((framesize + 63) / 64) << 8;
  31 +       msg.byte3 = ((framesize + 63) / 64) << 8;
  32 +
  33 +       msg.byte4 = msg.byte6 = framesize >> 8;
  34 +       msg.byte5 = msg.byte7 = framesize & 0xff;
  35 +
  36 +       if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAX_FRAME_LENGTH"))
  37 +               return -EIO;
  38 +
  39 +       return 0;
  40 +}
  41 +
  42  static int eth_open(struct net_device *dev)
  43  {
  44         struct port *port = netdev_priv(dev);
  45 @@ -1112,6 +1138,8 @@ static int eth_open(struct net_device *d
  46         if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
  47                 return -EIO;
  48
  49 +       eth_do_change_mtu(dev, dev->mtu);
  50 +
  51         if ((err = request_queues(port)) != 0)
  52                 return err;
  53
  54 @@ -1251,7 +1279,26 @@ static int eth_close(struct net_device *
  55         return 0;
  56  }
  57
  58 +static int ixp_eth_change_mtu(struct net_device *dev, int mtu)
  59 +{
  60 +       int ret;
  61 +
  62 +       if (mtu > MAX_MRU)
  63 +               return -EINVAL;
  64 +
  65 +       if (dev->flags & IFF_UP) {
  66 +               ret = eth_do_change_mtu(dev, mtu);
  67 +               if (ret < 0)
  68 +                       return ret;
  69 +       }
  70 +
  71 +       dev->mtu = mtu;
  72 +
  73 +       return 0;
  74 +}
  75 +
  76  static const struct net_device_ops ixp4xx_netdev_ops = {
  77 +       .ndo_change_mtu = ixp_eth_change_mtu,
  78         .ndo_open = eth_open,
  79         .ndo_stop = eth_close,
  80         .ndo_start_xmit = eth_xmit,