| 1 | --- a/drivers/net/arm/ixp4xx_eth.c |
| 2 | +++ b/drivers/net/arm/ixp4xx_eth.c |
| 3 | @@ -56,7 +56,7 @@ |
| 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 | @@ -1259,6 +1259,32 @@ 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 | @@ -1310,6 +1336,8 @@ 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 | @@ -1449,7 +1477,26 @@ 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, |
| 81 | |
