diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/ef100_netdev.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/ef100_netdev.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/ef100_netdev.c b/drivers/net/ethernet/sfc/ef100_netdev.c new file mode 100644 index 000000000000..f900b375d9b1 --- /dev/null +++ b/drivers/net/ethernet/sfc/ef100_netdev.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0-only +/**************************************************************************** + * Driver for Solarflare network controllers and boards + * Copyright 2018 Solarflare Communications Inc. + * Copyright 2019-2020 Xilinx Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation, incorporated herein by reference. + */ +#include "net_driver.h" +#include "mcdi_port_common.h" +#include "mcdi_functions.h" +#include "efx_common.h" +#include "efx_channels.h" +#include "tx_common.h" +#include "ef100_netdev.h" +#include "ef100_ethtool.h" +#include "efx_common.h" +#include "nic_common.h" +#include "ef100_nic.h" +#include "ef100_tx.h" +#include "ef100_regs.h" +#include "mcdi_filters.h" +#include "rx_common.h" + +static void ef100_update_name(struct efx_nic *efx) +{ + strcpy(efx->name, efx->net_dev->name); +} + +/* Initiate a packet transmission. We use one channel per CPU + * (sharing when we have more CPUs than channels). + * + * Context: non-blocking. + * Note that returning anything other than NETDEV_TX_OK will cause the + * OS to free the skb. + */ +static netdev_tx_t ef100_hard_start_xmit(struct sk_buff *skb, + struct net_device *net_dev) +{ + struct efx_nic *efx = netdev_priv(net_dev); + struct efx_tx_queue *tx_queue; + struct efx_channel *channel; + int rc; + + channel = efx_get_tx_channel(efx, skb_get_queue_mapping(skb)); + netif_vdbg(efx, tx_queued, efx->net_dev, + "%s len %d data %d channel %d\n", __func__, + skb->len, skb->data_len, channel->channel); + if (!efx->n_channels || !efx->n_tx_channels || !channel) { + netif_stop_queue(net_dev); + goto err; + } + + tx_queue = &channel->tx_queue[0]; + rc = ef100_enqueue_skb(tx_queue, skb); + if (rc == 0) + return NETDEV_TX_OK; + +err: + net_dev->stats.tx_dropped++; + return NETDEV_TX_OK; +} + +static const struct net_device_ops ef100_netdev_ops = { + .ndo_start_xmit = ef100_hard_start_xmit, +}; + +/* Netdev registration + */ +int ef100_netdev_event(struct notifier_block *this, + unsigned long event, void *ptr) +{ + struct efx_nic *efx = container_of(this, struct efx_nic, netdev_notifier); + struct net_device *net_dev = netdev_notifier_info_to_dev(ptr); + + if (netdev_priv(net_dev) == efx && event == NETDEV_CHANGENAME) + ef100_update_name(efx); + + return NOTIFY_DONE; +} + +int ef100_register_netdev(struct efx_nic *efx) +{ + struct net_device *net_dev = efx->net_dev; + int rc; + + net_dev->watchdog_timeo = 5 * HZ; + net_dev->irq = efx->pci_dev->irq; + net_dev->netdev_ops = &ef100_netdev_ops; + net_dev->min_mtu = EFX_MIN_MTU; + net_dev->max_mtu = EFX_MAX_MTU; + net_dev->ethtool_ops = &ef100_ethtool_ops; + + rtnl_lock(); + + rc = dev_alloc_name(net_dev, net_dev->name); + if (rc < 0) + goto fail_locked; + ef100_update_name(efx); + + rc = register_netdevice(net_dev); + if (rc) + goto fail_locked; + + /* Always start with carrier off; PHY events will detect the link */ + netif_carrier_off(net_dev); + + efx->state = STATE_READY; + rtnl_unlock(); + efx_init_mcdi_logging(efx); + + return 0; + +fail_locked: + rtnl_unlock(); + netif_err(efx, drv, efx->net_dev, "could not register net dev\n"); + return rc; +} + +void ef100_unregister_netdev(struct efx_nic *efx) +{ + if (efx_dev_registered(efx)) { + efx_fini_mcdi_logging(efx); + efx->state = STATE_UNINIT; + unregister_netdev(efx->net_dev); + } +} |