81 lines
1.9 KiB
Diff
81 lines
1.9 KiB
Diff
--- a/drivers/net/arm/ixp4xx_eth.c
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+++ b/drivers/net/arm/ixp4xx_eth.c
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@@ -52,7 +52,7 @@
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#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
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#define REGS_SIZE 0x1000
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-#define MAX_MRU 1536 /* 0x600 */
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+#define MAX_MRU (14320 - ETH_HLEN - ETH_FCS_LEN)
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#define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
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#define NAPI_WEIGHT 16
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@@ -1061,6 +1061,32 @@ static void destroy_queues(struct port *
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}
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}
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+static int eth_do_change_mtu(struct net_device *dev, int mtu)
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+{
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+ struct port *port;
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+ struct msg msg;
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+ /* adjust for ethernet headers */
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+ int framesize = mtu + ETH_HLEN + ETH_FCS_LEN;
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+
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+ port = netdev_priv(dev);
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+
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+ memset(&msg, 0, sizeof(msg));
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+ msg.cmd = NPE_SETMAXFRAMELENGTHS;
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+ msg.eth_id = port->id;
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+
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+ /* max rx/tx 64 byte blocks */
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+ msg.byte2 = ((framesize + 63) / 64) << 8;
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+ msg.byte3 = ((framesize + 63) / 64) << 8;
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+
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+ msg.byte4 = msg.byte6 = framesize >> 8;
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+ msg.byte5 = msg.byte7 = framesize & 0xff;
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+
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+ if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAX_FRAME_LENGTH"))
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+ return -EIO;
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+
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+ return 0;
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+}
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+
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static int eth_open(struct net_device *dev)
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{
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struct port *port = netdev_priv(dev);
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@@ -1112,6 +1138,8 @@ static int eth_open(struct net_device *d
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if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
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return -EIO;
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+ eth_do_change_mtu(dev, dev->mtu);
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+
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if ((err = request_queues(port)) != 0)
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return err;
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@@ -1251,7 +1279,26 @@ static int eth_close(struct net_device *
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return 0;
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}
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+static int ixp_eth_change_mtu(struct net_device *dev, int mtu)
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+{
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+ int ret;
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+
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+ if (mtu > MAX_MRU)
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+ return -EINVAL;
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+
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+ if (dev->flags & IFF_UP) {
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+ ret = eth_do_change_mtu(dev, mtu);
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+ if (ret < 0)
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+ return ret;
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+ }
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+
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+ dev->mtu = mtu;
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+
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+ return 0;
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+}
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+
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static const struct net_device_ops ixp4xx_netdev_ops = {
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+ .ndo_change_mtu = ixp_eth_change_mtu,
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.ndo_open = eth_open,
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.ndo_stop = eth_close,
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.ndo_start_xmit = eth_xmit,
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