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// 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);
}
}
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