linux/drivers/net/ethernet/sfc/ethtool.c

// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2005-2006 Fen Systems Ltd.
 * Copyright 2006-2013 Solarflare Communications Inc.
 */

#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/rtnetlink.h>
#include <linux/in.h>
#include "net_driver.h"
#include "workarounds.h"
#include "selftest.h"
#include "efx.h"
#include "efx_channels.h"
#include "rx_common.h"
#include "tx_common.h"
#include "ethtool_common.h"
#include "filter.h"
#include "nic.h"

#define EFX_ETHTOOL_EEPROM_MAGIC …

/**************************************************************************
 *
 * Ethtool operations
 *
 **************************************************************************
 */

/* Identify device by flashing LEDs */
static int efx_ethtool_phys_id(struct net_device *net_dev,
			       enum ethtool_phys_id_state state)
{ … }

static int efx_ethtool_get_regs_len(struct net_device *net_dev)
{ … }

static void efx_ethtool_get_regs(struct net_device *net_dev,
				 struct ethtool_regs *regs, void *buf)
{ … }

/*
 * Each channel has a single IRQ and moderation timer, started by any
 * completion (or other event).  Unless the module parameter
 * separate_tx_channels is set, IRQs and moderation are therefore
 * shared between RX and TX completions.  In this case, when RX IRQ
 * moderation is explicitly changed then TX IRQ moderation is
 * automatically changed too, but otherwise we fail if the two values
 * are requested to be different.
 *
 * The hardware does not support a limit on the number of completions
 * before an IRQ, so we do not use the max_frames fields.  We should
 * report and require that max_frames == (usecs != 0), but this would
 * invalidate existing user documentation.
 *
 * The hardware does not have distinct settings for interrupt
 * moderation while the previous IRQ is being handled, so we should
 * not use the 'irq' fields.  However, an earlier developer
 * misunderstood the meaning of the 'irq' fields and the driver did
 * not support the standard fields.  To avoid invalidating existing
 * user documentation, we report and accept changes through either the
 * standard or 'irq' fields.  If both are changed at the same time, we
 * prefer the standard field.
 *
 * We implement adaptive IRQ moderation, but use a different algorithm
 * from that assumed in the definition of struct ethtool_coalesce.
 * Therefore we do not use any of the adaptive moderation parameters
 * in it.
 */

static int efx_ethtool_get_coalesce(struct net_device *net_dev,
				    struct ethtool_coalesce *coalesce,
				    struct kernel_ethtool_coalesce *kernel_coal,
				    struct netlink_ext_ack *extack)
{ … }

static int efx_ethtool_set_coalesce(struct net_device *net_dev,
				    struct ethtool_coalesce *coalesce,
				    struct kernel_ethtool_coalesce *kernel_coal,
				    struct netlink_ext_ack *extack)
{ … }

static void
efx_ethtool_get_ringparam(struct net_device *net_dev,
			  struct ethtool_ringparam *ring,
			  struct kernel_ethtool_ringparam *kernel_ring,
			  struct netlink_ext_ack *extack)
{ … }

static int
efx_ethtool_set_ringparam(struct net_device *net_dev,
			  struct ethtool_ringparam *ring,
			  struct kernel_ethtool_ringparam *kernel_ring,
			  struct netlink_ext_ack *extack)
{ … }

static void efx_ethtool_get_wol(struct net_device *net_dev,
				struct ethtool_wolinfo *wol)
{ … }


static int efx_ethtool_set_wol(struct net_device *net_dev,
			       struct ethtool_wolinfo *wol)
{ … }

static void efx_ethtool_get_fec_stats(struct net_device *net_dev,
				      struct ethtool_fec_stats *fec_stats)
{ … }

static int efx_ethtool_get_ts_info(struct net_device *net_dev,
				   struct kernel_ethtool_ts_info *ts_info)
{ … }

const struct ethtool_ops efx_ethtool_ops = …;