On Fri, 13 Jul 2012 14:45:00 -0700 Jon Mason <[email protected]> wrote:
> A virtual ethernet device that uses the NTB transport API to send/receive > data. > > Signed-off-by: Jon Mason <[email protected]> > --- > drivers/net/Kconfig | 4 + > drivers/net/Makefile | 1 + > drivers/net/ntb_netdev.c | 411 > ++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 416 insertions(+), 0 deletions(-) > create mode 100644 drivers/net/ntb_netdev.c > +static void ntb_get_drvinfo(__attribute__((unused)) struct net_device *dev, > + struct ethtool_drvinfo *info) > +{ > + strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); > + strlcpy(info->version, NTB_NETDEV_VER, sizeof(info->version)); > +} > + > +static const char ntb_nic_stats[][ETH_GSTRING_LEN] = { > + "rx_packets", "rx_bytes", "rx_errors", "rx_dropped", "rx_length_errors", > + "rx_frame_errors", "rx_fifo_errors", > + "tx_packets", "tx_bytes", "tx_errors", "tx_dropped", > +}; > + > +static int ntb_get_stats_count(__attribute__((unused)) struct net_device > *dev) > +{ > + return ARRAY_SIZE(ntb_nic_stats); > +} > + > +static int ntb_get_sset_count(struct net_device *dev, int sset) > +{ > + switch (sset) { > + case ETH_SS_STATS: > + return ntb_get_stats_count(dev); > + default: > + return -EOPNOTSUPP; > + } > +} > + > +static void ntb_get_strings(__attribute__((unused)) struct net_device *dev, > + u32 sset, u8 *data) > +{ > + switch (sset) { > + case ETH_SS_STATS: > + memcpy(data, *ntb_nic_stats, sizeof(ntb_nic_stats)); > + } > +} > + > +static void > +ntb_get_ethtool_stats(struct net_device *dev, > + __attribute__((unused)) struct ethtool_stats *stats, > + u64 *data) > +{ > + int i = 0; > + > + data[i++] = dev->stats.rx_packets; > + data[i++] = dev->stats.rx_bytes; > + data[i++] = dev->stats.rx_errors; > + data[i++] = dev->stats.rx_dropped; > + data[i++] = dev->stats.rx_length_errors; > + data[i++] = dev->stats.rx_frame_errors; > + data[i++] = dev->stats.rx_fifo_errors; > + data[i++] = dev->stats.tx_packets; > + data[i++] = dev->stats.tx_bytes; > + data[i++] = dev->stats.tx_errors; > + data[i++] = dev->stats.tx_dropped; > +} These statistics add no value over existing network stats. Don't implement ethtool stats unless device has something more interesting to say. > +static const struct ethtool_ops ntb_ethtool_ops = { > + .get_drvinfo = ntb_get_drvinfo, > + .get_sset_count = ntb_get_sset_count, > + .get_strings = ntb_get_strings, > + .get_ethtool_stats = ntb_get_ethtool_stats, > + .get_link = ethtool_op_get_link, > +}; If you want to implement bonding or bridging then implementing get_settings would help. > +static int __init ntb_netdev_init_module(void) > +{ > + struct ntb_netdev *dev; > + int rc; > + > + pr_info("%s: Probe\n", KBUILD_MODNAME); Useless message > + netdev = alloc_etherdev(sizeof(struct ntb_netdev)); > + if (!netdev) > + return -ENOMEM; > + > + dev = netdev_priv(netdev); > + dev->ndev = netdev; > + netdev->features = NETIF_F_HIGHDMA; > + > + netdev->hw_features = netdev->features; > + netdev->watchdog_timeo = msecs_to_jiffies(NTB_TX_TIMEOUT_MS); > + > + random_ether_addr(netdev->perm_addr); > + memcpy(netdev->dev_addr, netdev->perm_addr, netdev->addr_len); > + > + netdev->netdev_ops = &ntb_netdev_ops; > + SET_ETHTOOL_OPS(netdev, &ntb_ethtool_ops); > + > + dev->qp = ntb_transport_create_queue(ntb_netdev_rx_handler, > + ntb_netdev_tx_handler, > + ntb_netdev_event_handler); > + if (!dev->qp) { > + rc = -EIO; > + goto err; > + } > + > + netdev->mtu = ntb_transport_max_size(dev->qp) - ETH_HLEN; > + > + rc = register_netdev(netdev); > + if (rc) > + goto err1; > + > + pr_info("%s: %s created\n", KBUILD_MODNAME, netdev->name); > + return 0; > + > +err1: > + ntb_transport_free_queue(dev->qp); > +err: > + free_netdev(netdev); > + return rc; > +} > +module_init(ntb_netdev_init_module); > + > +static void __exit ntb_netdev_exit_module(void) > +{ > + struct ntb_netdev *dev = netdev_priv(netdev); > + > + unregister_netdev(netdev); > + ntb_transport_free_queue(dev->qp); > + free_netdev(netdev); > + > + pr_info("%s: Driver removed\n", KBUILD_MODNAME); > +} > +module_exit(ntb_netdev_exit_module); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
