path: root/drivers/net/ethernet/sfc/ethtool.c

/****************************************************************************
 * Driver for Solarflare network controllers and boards
 * Copyright 2005-2006 Fen Systems Ltd.
 * Copyright 2006-2013 Solarflare Communications 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 <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 "filter.h"
#include "nic.h"

struct efx_sw_stat_desc {
	const char *name;
	enum {
		EFX_ETHTOOL_STAT_SOURCE_nic,
		EFX_ETHTOOL_STAT_SOURCE_channel,
		EFX_ETHTOOL_STAT_SOURCE_tx_queue
	} source;
	unsigned offset;
	u64(*get_stat) (void *field); /* Reader function */
};

/* Initialiser for a struct efx_sw_stat_desc with type-checking */
#define EFX_ETHTOOL_STAT(stat_name, source_name, field, field_type, \
				get_stat_function) {			\
	.name = #stat_name,						\
	.source = EFX_ETHTOOL_STAT_SOURCE_##source_name,		\
	.offset = ((((field_type *) 0) ==				\
		      &((struct efx_##source_name *)0)->field) ?	\
		    offsetof(struct efx_##source_name, field) :		\
		    offsetof(struct efx_##source_name, field)),		\
	.get_stat = get_stat_function,					\
}

static u64 efx_get_uint_stat(void *field)
{
	return *(unsigned int *)field;
}

static u64 efx_get_atomic_stat(void *field)
{
	return atomic_read((atomic_t *) field);
}

#define EFX_ETHTOOL_ATOMIC_NIC_ERROR_STAT(field)		\
	EFX_ETHTOOL_STAT(field, nic, field,			\
			 atomic_t, efx_get_atomic_stat)

#define EFX_ETHTOOL_UINT_CHANNEL_STAT(field)			\
	EFX_ETHTOOL_STAT(field, channel, n_##field,		\
			 unsigned int, efx_get_uint_stat)

#define EFX_ETHTOOL_UINT_TXQ_STAT(field)			\
	EFX_ETHTOOL_STAT(tx_##field, tx_queue, field,		\
			 unsigned int, efx_get_uint_stat)

static const struct efx_sw_stat_desc efx_sw_stat_desc[] = {
	EFX_ETHTOOL_UINT_TXQ_STAT(merge_events),
	EFX_ETHTOOL_UINT_TXQ_STAT(tso_bursts),
	EFX_ETHTOOL_UINT_TXQ_STAT(tso_long_headers),
	EFX_ETHTOOL_UINT_TXQ_STAT(tso_packets),
	EFX_ETHTOOL_UINT_TXQ_STAT(pushes),
	EFX_ETHTOOL_UINT_TXQ_STAT(pio_packets),
	EFX_ETHTOOL_ATOMIC_NIC_ERROR_STAT(rx_reset),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_tobe_disc),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_ip_hdr_chksum_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_tcp_udp_chksum_err),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_mcast_mismatch),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_frm_trunc),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_nodesc_trunc),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_merge_events),
	EFX_ETHTOOL_UINT_CHANNEL_STAT(rx_merge_packets),
};

#define EFX_ETHTOOL_SW_STAT_COUNT ARRAY_SIZE(efx_sw_stat_desc)

#define EFX_ETHTOOL_EEPROM_MAGIC 0xEFAB

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

/* Identify device by flashing LEDs */
static int efx_ethtool_phys_id(struct net_device *net_dev,
			       enum ethtool_phys_id_state state)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	enum efx_led_mode mode = EFX_LED_DEFAULT;

	switch (state) {
	case ETHTOOL_ID_ON:
		mode = EFX_LED_ON;
		break;
	case ETHTOOL_ID_OFF:
		mode = EFX_LED_OFF;
		break;
	case ETHTOOL_ID_INACTIVE:
		mode = EFX_LED_DEFAULT;
		break;
	case ETHTOOL_ID_ACTIVE:
		return 1;	/* cycle on/off once per second */
	}

	efx->type->set_id_led(efx, mode);
	return 0;
}

/* This must be called with rtnl_lock held. */
static int efx_ethtool_get_settings(struct net_device *net_dev,
				    struct ethtool_cmd *ecmd)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_link_state *link_state = &efx->link_state;

	mutex_lock(&efx->mac_lock);
	efx->phy_op->get_settings(efx, ecmd);
	mutex_unlock(&efx->mac_lock);

	/* Both MACs support pause frames (bidirectional and respond-only) */
	ecmd->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;

	if (LOOPBACK_INTERNAL(efx)) {
		ethtool_cmd_speed_set(ecmd, link_state->speed);
		ecmd->duplex = link_state->fd ? DUPLEX_FULL : DUPLEX_HALF;
	}

	return 0;
}

/* This must be called with rtnl_lock held. */
static int efx_ethtool_set_settings(struct net_device *net_dev,
				    struct ethtool_cmd *ecmd)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int rc;

	/* GMAC does not support 1000Mbps HD */
	if ((ethtool_cmd_speed(ecmd) == SPEED_1000) &&
	    (ecmd->duplex != DUPLEX_FULL)) {
		netif_dbg(efx, drv, efx->net_dev,
			  "rejecting unsupported 1000Mbps HD setting\n");
		retur