// 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 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_link_ksettings(struct net_device *net_dev,
			       struct ethtool_link_ksettings *cmd)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_link_state *link_state = &efx->link_state;
	u32 supported;

	mutex_lock(&efx->mac_lock);
	efx->phy_op->get_link_ksettings(efx, cmd);
	mutex_unlock(&efx->mac_lock);

	/* Both MACs support pause frames (bidirectional and respond-only) */
	ethtool_convert_link_mode_to_legacy_u32(&supported,
						cmd->link_modes.supported);

	supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;

	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
						supported);

	if (LOOPBACK_INTERNAL(efx)) {
		cmd->base.speed = link_state->speed;
		cmd->base.duplex = link_state->fd ? DUPLEX_FULL : DUPLEX_HALF;
	}

	return 0;
}

/* This must be called with rtnl_lock held. */
static int
efx_ethtool_set_link_ksettings(struct net_device *net_dev,
			       const struct ethtool_link_ksettings *cmd)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int rc;

	/* GMAC does not support 1000Mbps HD */
	if ((cmd->base.speed == SPEED_1000) &&
	    (cmd->base.duplex != DUPLEX_FULL)) {
		netif_dbg(efx, drv, efx->net_dev,
			  "rejecting unsupported 1000Mbps HD setting\n");
		return -EINVAL;
	}

	mutex_lock(&efx->mac_lock);
	rc = efx->phy_op->set_link_ksettings(efx, cmd);
	mutex_unlock(&efx->mac_lock);
	return rc;
}

static int efx_ethtool_get_regs_len(struct net_device *net_dev)
{
	return efx_nic_get_regs_len(netdev_priv(net_dev));
}

static void efx_ethtool_get_regs(struct net_device *net_dev,
				 struct ethtool_regs *regs, void *buf)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	regs->version = efx->type->revision;
	efx_nic_get_regs(efx, buf);
}

static void efx_ethtool_self_test(struct net_device *net_dev,
				  struct ethtool_test *test, u64 *data)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_self_tests *efx_tests;
	bool already_up;
	int rc = -ENOMEM;

	efx_tests = kzalloc(sizeof(*efx_tests), GFP_KERNEL);
	if (!efx_tests)
		goto fail;

	if (efx->state != STATE_READY) {
		rc = -EBUSY;
		goto out;
	}

	netif_info(efx, drv, efx->net_dev, "starting %sline testing\n",
		   (test->flags & ETH_TEST_FL_OFFLINE) ? "off" : "on");

	/* We need rx buffers and interrupts. */
	already_up = (efx->net_dev->flags & IFF_UP);
	if (!already_up) {
		rc = dev_open(efx->net_dev, NULL);
		if (rc) {
			netif_err(efx, drv, efx->net_dev,
				  "failed opening device.\n");
			goto out;
		}
	}

	rc = efx_selftest(efx, efx_tests, test->flags);

	if (!already_up)
		dev_close(efx->net_dev);

	netif_info(efx, drv, efx->net_dev, "%s %sline self-tests\n",
		   rc == 0 ? "passed" : "failed",
		   (test->flags & ETH_TEST_FL_OFFLINE) ? "off" : "on");

out:
	efx_ethtool_fill_self_tests(efx, efx_tests, NULL, data);
	kfree(efx_tests);
fail:
	if (rc)
		test->flags |= ETH_TEST_FL_FAILED;
}

/* Restart autonegotiation */
static int efx_ethtool_nway_reset(struct net_device *net_dev)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	return mdio45_nway_restart(&efx->mdio);
}

/*
 * 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 efx_nic *efx = netdev_priv(net_dev);
	unsigned int tx_usecs, rx_usecs;
	bool rx_adaptive;

	efx_get_irq_moderation(efx, &tx_usecs, &rx_usecs, &rx_adaptive);

	coalesce->tx_coalesce_usecs = tx_usecs;
	coalesce->tx_coalesce_usecs_irq = tx_usecs;
	coalesce->rx_coalesce_usecs = rx_usecs;
	coalesce->rx_coalesce_usecs_irq = rx_usecs;
	coalesce->use_adaptive_rx_coalesce = rx_adaptive;

	return 0;
}

static int efx_ethtool_set_coalesce(struct net_device *net_dev,
				    struct ethtool_coalesce *coalesce)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_channel *channel;
	unsigned int tx_usecs, rx_usecs;
	bool adaptive, rx_may_override_tx;
	int rc;

	if (coalesce->use_adaptive_tx_coalesce)
		return -EINVAL;

	efx_get_irq_moderation(efx, &tx_usecs, &rx_usecs, &adaptive);

	if (coalesce->rx_coalesce_usecs != rx_usecs)
		rx_usecs = coalesce->rx_coalesce_usecs;
	else
		rx_usecs = coalesce->rx_coalesce_usecs_irq;

	adaptive = coalesce->use_adaptive_rx_coalesce;

	/* If channels are shared, TX IRQ moderation can be quietly
	 * overridden unless it is changed from its old value.
	 */
	rx_may_override_tx = (coalesce->tx_coalesce_usecs == tx_usecs &&
			      coalesce->tx_coalesce_usecs_irq == tx_usecs);
	if (coalesce->tx_coalesce_usecs != tx_usecs)
		tx_usecs = coalesce->tx_coalesce_usecs;
	else
		tx_usecs = coalesce->tx_coalesce_usecs_irq;

	rc = efx_init_irq_moderation(efx, tx_usecs, rx_usecs, adaptive,
				     rx_may_override_tx);
	if (rc != 0)
		return rc;

	efx_for_each_channel(channel, efx)
		efx->type->push_irq_moderation(channel);

	return 0;
}

static void efx_ethtool_get_ringparam(struct net_device *net_dev,
				      struct ethtool_ringparam *ring)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	ring->rx_max_pending = EFX_MAX_DMAQ_SIZE;
	ring->tx_max_pending = EFX_TXQ_MAX_ENT(efx);
	ring->rx_pending = efx->rxq_entries;
	ring->tx_pending = efx->txq_entries;
}

static int efx_ethtool_set_ringparam(struct net_device *net_dev,
				     struct ethtool_ringparam *ring)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	u32 txq_entries;

	if (ring->rx_mini_pending || ring->rx_jumbo_pending ||
	    ring->rx_pending > EFX_MAX_DMAQ_SIZE ||
	    ring->tx_pending > EFX_TXQ_MAX_ENT(efx))
		return -EINVAL;

	if (ring->rx_pending < EFX_RXQ_MIN_ENT) {
		netif_err(efx, drv, efx->net_dev,
			  "RX queues cannot be smaller than %u\n",
			  EFX_RXQ_MIN_ENT);
		return -EINVAL;
	}

	txq_entries = max(ring->tx_pending, EFX_TXQ_MIN_ENT(efx));
	if (txq_entries != ring->tx_pending)
		netif_warn(efx, drv, efx->net_dev,
			   "increasing TX queue size to minimum of %u\n",
			   txq_entries);

	return efx_realloc_channels(efx, ring->rx_pending, txq_entries);
}

static int efx_ethtool_set_pauseparam(struct net_device *net_dev,
				      struct ethtool_pauseparam *pause)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	u8 wanted_fc, old_fc;
	u32 old_adv;
	int rc = 0;

	mutex_lock(&efx->mac_lock);

	wanted_fc = ((pause->rx_pause ? EFX_FC_RX : 0) |
		     (pause->tx_pause ? EFX_FC_TX : 0) |
		     (pause->autoneg ? EFX_FC_AUTO : 0));

	if ((wanted_fc & EFX_FC_TX) && !(wanted_fc & EFX_FC_RX)) {
		netif_dbg(efx, drv, efx->net_dev,
			  "Flow control unsupported: tx ON rx OFF\n");
		rc = -EINVAL;
		goto out;
	}

	if ((wanted_fc & EFX_FC_AUTO) && !efx->link_advertising[0]) {
		netif_dbg(efx, drv, efx->net_dev,
			  "Autonegotiation is disabled\n");
		rc = -EINVAL;
		goto out;
	}

	/* Hook for Falcon bug 11482 workaround */
	if (efx->type->prepare_enable_fc_tx &&
	    (wanted_fc & EFX_FC_TX) && !(efx->wanted_fc & EFX_FC_TX))
		efx->type->prepare_enable_fc_tx(efx);

	old_adv = efx->link_advertising[0];
	old_fc = efx->wanted_fc;
	efx_link_set_wanted_fc(efx, wanted_fc);
	if (efx->link_advertising[0] != old_adv ||
	    (efx->wanted_fc ^ old_fc) & EFX_FC_AUTO) {
		rc = efx->phy_op->reconfigure(efx);
		if (rc) {
			netif_err(efx, drv, efx->net_dev,
				  "Unable to advertise requested flow "
				  "control setting\n");
			goto out;
		}
	}

	/* Reconfigure the MAC. The PHY *may* generate a link state change event
	 * if the user just changed the advertised capabilities, but there's no
	 * harm doing this twice */
	efx_mac_reconfigure(efx);

out:
	mutex_unlock(&efx->mac_lock);

	return rc;
}

static void efx_ethtool_get_wol(struct net_device *net_dev,
				struct ethtool_wolinfo *wol)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	return efx->type->get_wol(efx, wol);
}


static int efx_ethtool_set_wol(struct net_device *net_dev,
			       struct ethtool_wolinfo *wol)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	return efx->type->set_wol(efx, wol->wolopts);
}

static int efx_ethtool_reset(struct net_device *net_dev, u32 *flags)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int rc;

	rc = efx->type->map_reset_flags(flags);
	if (rc < 0)
		return rc;

	return efx_reset(efx, rc);
}

/* MAC address mask including only I/G bit */
static const u8 mac_addr_ig_mask[ETH_ALEN] __aligned(2) = {0x01, 0, 0, 0, 0, 0};

#define IP4_ADDR_FULL_MASK	((__force __be32)~0)
#define IP_PROTO_FULL_MASK	0xFF
#define PORT_FULL_MASK		((__force __be16)~0)
#define ETHER_TYPE_FULL_MASK	((__force __be16)~0)

static inline void ip6_fill_mask(__be32 *mask)
{
	mask[0] = mask[1] = mask[2] = mask[3] = ~(__be32)0;
}

static int efx_ethtool_get_class_rule(struct efx_nic *efx,
				      struct ethtool_rx_flow_spec *rule,
				      u32 *rss_context)
{
	struct ethtool_tcpip4_spec *ip_entry = &rule->h_u.tcp_ip4_spec;
	struct ethtool_tcpip4_spec *ip_mask = &rule->m_u.tcp_ip4_spec;
	struct ethtool_usrip4_spec *uip_entry = &rule->h_u.usr_ip4_spec;
	struct ethtool_usrip4_spec *uip_mask = &rule->m_u.usr_ip4_spec;
	struct ethtool_tcpip6_spec *ip6_entry = &rule->h_u.tcp_ip6_spec;
	struct ethtool_tcpip6_spec *ip6_mask = &rule->m_u.tcp_ip6_spec;
	struct ethtool_usrip6_spec *uip6_entry = &rule->h_u.usr_ip6_spec;
	struct ethtool_usrip6_spec *uip6_mask = &rule->m_u.usr_ip6_spec;
	struct ethhdr *mac_entry = &rule->h_u.ether_spec;
	struct ethhdr *mac_mask = &rule->m_u.ether_spec;
	struct efx_filter_spec spec;
	int rc;

	rc = efx_filter_get_filter_safe(efx, EFX_FILTER_PRI_MANUAL,
					rule->location, &spec);
	if (rc)
		return rc;

	if (spec.dmaq_id == EFX_FILTER_RX_DMAQ_ID_DROP)
		rule->ring_cookie = RX_CLS_FLOW_DISC;
	else
		rule->ring_cookie = spec.dmaq_id;

	if ((spec.match_flags & EFX_FILTER_MATCH_ETHER_TYPE) &&
	    spec.ether_type == htons(ETH_P_IP) &&
	    (spec.match_flags & EFX_FILTER_MATCH_IP_PROTO) &&
	    (spec.ip_proto == IPPROTO_TCP || spec.ip_proto == IPPROTO_UDP) &&
	    !(spec.match_flags &
	      ~(EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_OUTER_VID |
		EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_REM_HOST |
		EFX_FILTER_MATCH_IP_PROTO |
		EFX_FILTER_MATCH_LOC_PORT | EFX_FILTER_MATCH_REM_PORT))) {
		rule->flow_type = ((spec.ip_proto == IPPROTO_TCP) ?
				   TCP_V4_FLOW : UDP_V4_FLOW);
		if (spec.match_flags & EFX_FILTER_MATCH_LOC_HOST) {
			ip_entry->ip4dst = spec.loc_host[0];
			ip_mask->ip4dst = IP4_ADDR_FULL_MASK;
		}
		if (spec.match_flags & EFX_FILTER_MATCH_REM_HOST) {
			ip_entry->ip4src = spec.rem_host[0];
			ip_mask->ip4src = IP4_ADDR_FULL_MASK;
		}
		if (spec.match_flags & EFX_FILTER_MATCH_LOC_PORT) {
			ip_entry->pdst = spec.loc_port;
			ip_mask->pdst = PORT_FULL_MASK;
		}
		if (spec.match_flags & EFX_FILTER_MATCH_REM_PORT) {
			ip_entry->psrc = spec.rem_port;
			ip_mask->psrc = PORT_FULL_MASK;
		}
	} else if ((spec.match_flags & EFX_FILTER_MATCH_ETHER_TYPE) &&
	    spec.ether_type == htons(ETH_P_IPV6) &&
	    (spec.match_flags & EFX_FILTER_MATCH_IP_PROTO) &&
	    (spec.ip_proto == IPPROTO_TCP || spec.ip_proto == IPPROTO_UDP) &&
	    !(spec.match_flags &
	      ~(EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_OUTER_VID |
		EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_REM_HOST |
		EFX_FILTER_MATCH_IP_PROTO |
		EFX_FILTER_MATCH_LOC_PORT | EFX_FILTER_MATCH_REM_PORT))) {
		rule->flow_type = ((spec.ip_proto == IPPROTO_TCP) ?
				   TCP_V6_FLOW : UDP_V6_FLOW);
		if (spec.match_flags & EFX_FILTER_MATCH_LOC_HOST) {
			memcpy(ip6_entry->ip6dst, spec.loc_host,
			       sizeof(ip6_entry->ip6dst));
			ip6_fill_mask(ip6_mask->ip6dst);
		}
		if (spec.match_flags & EFX_FILTER_MATCH_REM_HOST) {
			memcpy(ip6_entry->ip6src, spec.rem_host,
			       sizeof(ip6_entry->ip6src));
			ip6_fill_mask(ip6_mask->ip6src);
		}
		if (spec.match_flags & EFX_FILTER_MATCH_LOC_PORT) {
			ip6_entry->pdst = spec.loc_port;
			ip6_mask->pdst = PORT_FULL_MASK;
		}
		if (spec.match_flags & EFX_FILTER_MATCH_REM_PORT) {
			ip6_entry->psrc = spec.rem_port;
			ip6_mask->psrc = PORT_FULL_MASK;
		}
	} else if (!(spec.match_flags &
		     ~(EFX_FILTER_MATCH_LOC_MAC | EFX_FILTER_MATCH_LOC_MAC_IG |
		       EFX_FILTER_MATCH_REM_MAC | EFX_FILTER_MATCH_ETHER_TYPE |
		       EFX_FILTER_MATCH_OUTER_VID))) {
		rule->flow_type = ETHER_FLOW;
		if (spec.match_flags &
		    (EFX_FILTER_MATCH_LOC_MAC | EFX_FILTER_MATCH_LOC_MAC_IG)) {
			ether_addr_copy(mac_entry->h_dest, spec.loc_mac);
			if (spec.match_flags & EFX_FILTER_MATCH_LOC_MAC)
				eth_broadcast_addr(mac_mask->h_dest);
			else
				ether_addr_copy(mac_mask->h_dest,
						mac_addr_ig_mask);
		}
		if (spec.match_flags & EFX_FILTER_MATCH_REM_MAC) {
			ether_addr_copy(mac_entry->h_source, spec.rem_mac);
			eth_broadcast_addr(mac_mask->h_source);
		}
		if (spec.match_flags & EFX_FILTER_MATCH_ETHER_TYPE) {
			mac_entry->h_proto = spec.ether_type;
			mac_mask->h_proto = ETHER_TYPE_FULL_MASK;
		}
	} else if (spec.match_flags & EFX_FILTER_MATCH_ETHER_TYPE &&
		   spec.ether_type == htons(ETH_P_IP) &&
		   !(spec.match_flags &
		     ~(EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_OUTER_VID |
		       EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_REM_HOST |
		       EFX_FILTER_MATCH_IP_PROTO))) {
		rule->flow_type = IPV4_USER_FLOW;
		uip_entry->ip_ver = ETH_RX_NFC_IP4;
		if (spec.match_flags & EFX_FILTER_MATCH_IP_PROTO) {
			uip_mask->proto = IP_PROTO_FULL_MASK;
			uip_entry->proto = spec.ip_proto;
		}
		if (spec.match_flags & EFX_FILTER_MATCH_LOC_HOST) {
			uip_entry->ip4dst = spec.loc_host[0];
			uip_mask->ip4dst = IP4_ADDR_FULL_MASK;
		}
		if (spec.match_flags & EFX_FILTER_MATCH_REM_HOST) {
			uip_entry->ip4src = spec.rem_host[0];
			uip_mask->ip4src = IP4_ADDR_FULL_MASK;
		}
	} else if (spec.match_flags & EFX_FILTER_MATCH_ETHER_TYPE &&
		   spec.ether_type == htons(ETH_P_IPV6) &&
		   !(spec.match_flags &
		     ~(EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_OUTER_VID |
		       EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_REM_HOST |
		       EFX_FILTER_MATCH_IP_PROTO))) {
		rule->flow_type = IPV6_USER_FLOW;
		if (spec.match_flags & EFX_FILTER_MATCH_IP_PROTO) {
			uip6_mask->l4_proto = IP_PROTO_FULL_MASK;
			uip6_entry->l4_proto = spec.ip_proto;
		}
		if (spec.match_flags & EFX_FILTER_MATCH_LOC_HOST) {
			memcpy(uip6_entry->ip6dst, spec.loc_host,
			       sizeof(uip6_entry->ip6dst));
			ip6_fill_mask(uip6_mask->ip6dst);
		}
		if (spec.match_flags & EFX_FILTER_MATCH_REM_HOST) {
			memcpy(uip6_entry->ip6src, spec.rem_host,
			       sizeof(uip6_entry->ip6src));
			ip6_fill_mask(uip6_mask->ip6src);
		}
	} else {
		/* The above should handle all filters that we insert */
		WARN_ON(1);
		return -EINVAL;
	}

	if (spec.match_flags & EFX_FILTER_MATCH_OUTER_VID) {
		rule->flow_type |= FLOW_EXT;
		rule->h_ext.vlan_tci = spec.outer_vid;
		rule->m_ext.vlan_tci = htons(0xfff);
	}

	if (spec.flags & EFX_FILTER_FLAG_RX_RSS) {
		rule->flow_type |= FLOW_RSS;
		*rss_context = spec.rss_context;
	}

	return rc;
}

static int
efx_ethtool_get_rxnfc(struct net_device *net_dev,
		      struct ethtool_rxnfc *info, u32 *rule_locs)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	u32 rss_context = 0;
	s32 rc = 0;

	switch (info->cmd) {
	case ETHTOOL_GRXRINGS:
		info->data = efx->n_rx_channels;
		return 0;

	case ETHTOOL_GRXFH: {
		struct efx_rss_context *ctx = &efx->rss_context;

		mutex_lock(&efx->rss_lock);
		if (info->flow_type & FLOW_RSS && info->rss_context) {
			ctx = efx_find_rss_context_entry(efx, info->rss_context);
			if (!ctx) {
				rc = -ENOENT;
				goto out_unlock;
			}
		}
		info->data = 0;
		if (!efx_rss_active(ctx)) /* No RSS */
			goto out_unlock;
		switch (info->flow_type & ~FLOW_RSS) {
		case UDP_V4_FLOW:
			if (ctx->rx_hash_udp_4tuple)
				/* fall through */
		case TCP_V4_FLOW:
				info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
			/* fall through */
		case SCTP_V4_FLOW:
		case AH_ESP_V4_FLOW:
		case IPV4_FLOW:
			info->data |= RXH_IP_SRC | RXH_IP_DST;
			break;
		case UDP_V6_FLOW:
			if (ctx->rx_hash_udp_4tuple)
				/* fall through */
		case TCP_V6_FLOW:
				info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
			/* fall through */
		case SCTP_V6_FLOW:
		case AH_ESP_V6_FLOW:
		case IPV6_FLOW:
			info->data |= RXH_IP_SRC | RXH_IP_DST;
			break;
		default:
			break;
		}
out_unlock:
		mutex_unlock(&efx->rss_lock);
		return rc;
	}

	case ETHTOOL_GRXCLSRLCNT:
		info->data = efx_filter_get_rx_id_limit(efx);
		if (info->data == 0)
			return -EOPNOTSUPP;
		info->data |= RX_CLS_LOC_SPECIAL;
		info->rule_cnt =
			efx_filter_count_rx_used(efx, EFX_FILTER_PRI_MANUAL);
		return 0;

	case ETHTOOL_GRXCLSRULE:
		if (efx_filter_get_rx_id_limit(efx) == 0)
			return -EOPNOTSUPP;
		rc = efx_ethtool_get_class_rule(efx, &info->fs, &rss_context);
		if (rc < 0)
			return rc;
		if (info->fs.flow_type & FLOW_RSS)
			info->rss_context = rss_context;
		return 0;

	case ETHTOOL_GRXCLSRLALL:
		info->data = efx_filter_get_rx_id_limit(efx);
		if (info->data == 0)
			return -EOPNOTSUPP;
		rc = efx_filter_get_rx_ids(efx, EFX_FILTER_PRI_MANUAL,
					   rule_locs, info->rule_cnt);
		if (rc < 0)
			return rc;
		info->rule_cnt = rc;
		return 0;

	default:
		return -EOPNOTSUPP;
	}
}

static inline bool ip6_mask_is_full(__be32 mask[4])
{
	return !~(mask[0] & mask[1] & mask[2] & mask[3]);
}

static inline bool ip6_mask_is_empty(__be32 mask[4])
{
	return !(mask[0] | mask[1] | mask[2] | mask[3]);
}

static int efx_ethtool_set_class_rule(struct efx_nic *efx,
				      struct ethtool_rx_flow_spec *rule,
				      u32 rss_context)
{
	struct ethtool_tcpip4_spec *ip_entry = &rule->h_u.tcp_ip4_spec;
	struct ethtool_tcpip4_spec *ip_mask = &rule->m_u.tcp_ip4_spec;
	struct ethtool_usrip4_spec *uip_entry = &rule->h_u.usr_ip4_spec;
	struct ethtool_usrip4_spec *uip_mask = &rule->m_u.usr_ip4_spec;
	struct ethtool_tcpip6_spec *ip6_entry = &rule->h_u.tcp_ip6_spec;
	struct ethtool_tcpip6_spec *ip6_mask = &rule->m_u.tcp_ip6_spec;
	struct ethtool_usrip6_spec *uip6_entry = &rule->h_u.usr_ip6_spec;
	struct ethtool_usrip6_spec *uip6_mask = &rule->m_u.usr_ip6_spec;
	u32 flow_type = rule->flow_type & ~(FLOW_EXT | FLOW_RSS);
	struct ethhdr *mac_entry = &rule->h_u.ether_spec;
	struct ethhdr *mac_mask = &rule->m_u.ether_spec;
	enum efx_filter_flags flags = 0;
	struct efx_filter_spec spec;
	int rc;

	/* Check that user wants us to choose the location */
	if (rule->location != RX_CLS_LOC_ANY)
		return -EINVAL;

	/* Range-check ring_cookie */
	if (rule->ring_cookie >= efx->n_rx_channels &&
	    rule->ring_cookie != RX_CLS_FLOW_DISC)
		return -EINVAL;

	/* Check for unsupported extensions */
	if ((rule->flow_type & FLOW_EXT) &&
	    (rule->m_ext.vlan_etype || rule->m_ext.data[0] ||
	     rule->m_ext.data[1]))
		return -EINVAL;

	if (efx->rx_scatter)
		flags |= EFX_FILTER_FLAG_RX_SCATTER;
	if (rule->flow_type & FLOW_RSS)
		flags |= EFX_FILTER_FLAG_RX_RSS;

	efx_filter_init_rx(&spec, EFX_FILTER_PRI_MANUAL, flags,
			   (rule->ring_cookie == RX_CLS_FLOW_DISC) ?
			   EFX_FILTER_RX_DMAQ_ID_DROP : rule->ring_cookie);

	if (rule->flow_type & FLOW_RSS)
		spec.rss_context = rss_context;

	switch (flow_type) {
	case TCP_V4_FLOW:
	case UDP_V4_FLOW:
		spec.match_flags = (EFX_FILTER_MATCH_ETHER_TYPE |
				    EFX_FILTER_MATCH_IP_PROTO);
		spec.ether_type = htons(ETH_P_IP);
		spec.ip_proto = flow_type == TCP_V4_FLOW ? IPPROTO_TCP
							 : IPPROTO_UDP;
		if (ip_mask->ip4dst) {
			if (ip_mask->ip4dst != IP4_ADDR_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_LOC_HOST;
			spec.loc_host[0] = ip_entry->ip4dst;
		}
		if (ip_mask->ip4src) {
			if (ip_mask->ip4src != IP4_ADDR_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_REM_HOST;
			spec.rem_host[0] = ip_entry->ip4src;
		}
		if (ip_mask->pdst) {
			if (ip_mask->pdst != PORT_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_LOC_PORT;
			spec.loc_port = ip_entry->pdst;
		}
		if (ip_mask->psrc) {
			if (ip_mask->psrc != PORT_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_REM_PORT;
			spec.rem_port = ip_entry->psrc;
		}
		if (ip_mask->tos)
			return -EINVAL;
		break;

	case TCP_V6_FLOW:
	case UDP_V6_FLOW:
		spec.match_flags = (EFX_FILTER_MATCH_ETHER_TYPE |
				    EFX_FILTER_MATCH_IP_PROTO);
		spec.ether_type = htons(ETH_P_IPV6);
		spec.ip_proto = flow_type == TCP_V6_FLOW ? IPPROTO_TCP
							 : IPPROTO_UDP;
		if (!ip6_mask_is_empty(ip6_mask->ip6dst)) {
			if (!ip6_mask_is_full(ip6_mask->ip6dst))
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_LOC_HOST;
			memcpy(spec.loc_host, ip6_entry->ip6dst, sizeof(spec.loc_host));
		}
		if (!ip6_mask_is_empty(ip6_mask->ip6src)) {
			if (!ip6_mask_is_full(ip6_mask->ip6src))
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_REM_HOST;
			memcpy(spec.rem_host, ip6_entry->ip6src, sizeof(spec.rem_host));
		}
		if (ip6_mask->pdst) {
			if (ip6_mask->pdst != PORT_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_LOC_PORT;
			spec.loc_port = ip6_entry->pdst;
		}
		if (ip6_mask->psrc) {
			if (ip6_mask->psrc != PORT_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_REM_PORT;
			spec.rem_port = ip6_entry->psrc;
		}
		if (ip6_mask->tclass)
			return -EINVAL;
		break;

	case IPV4_USER_FLOW:
		if (uip_mask->l4_4_bytes || uip_mask->tos || uip_mask->ip_ver ||
		    uip_entry->ip_ver != ETH_RX_NFC_IP4)
			return -EINVAL;
		spec.match_flags = EFX_FILTER_MATCH_ETHER_TYPE;
		spec.ether_type = htons(ETH_P_IP);
		if (uip_mask->ip4dst) {
			if (uip_mask->ip4dst != IP4_ADDR_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_LOC_HOST;
			spec.loc_host[0] = uip_entry->ip4dst;
		}
		if (uip_mask->ip4src) {
			if (uip_mask->ip4src != IP4_ADDR_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_REM_HOST;
			spec.rem_host[0] = uip_entry->ip4src;
		}
		if (uip_mask->proto) {
			if (uip_mask->proto != IP_PROTO_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_IP_PROTO;
			spec.ip_proto = uip_entry->proto;
		}
		break;

	case IPV6_USER_FLOW:
		if (uip6_mask->l4_4_bytes || uip6_mask->tclass)
			return -EINVAL;
		spec.match_flags = EFX_FILTER_MATCH_ETHER_TYPE;
		spec.ether_type = htons(ETH_P_IPV6);
		if (!ip6_mask_is_empty(uip6_mask->ip6dst)) {
			if (!ip6_mask_is_full(uip6_mask->ip6dst))
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_LOC_HOST;
			memcpy(spec.loc_host, uip6_entry->ip6dst, sizeof(spec.loc_host));
		}
		if (!ip6_mask_is_empty(uip6_mask->ip6src)) {
			if (!ip6_mask_is_full(uip6_mask->ip6src))
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_REM_HOST;
			memcpy(spec.rem_host, uip6_entry->ip6src, sizeof(spec.rem_host));
		}
		if (uip6_mask->l4_proto) {
			if (uip6_mask->l4_proto != IP_PROTO_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_IP_PROTO;
			spec.ip_proto = uip6_entry->l4_proto;
		}
		break;

	case ETHER_FLOW:
		if (!is_zero_ether_addr(mac_mask->h_dest)) {
			if (ether_addr_equal(mac_mask->h_dest,
					     mac_addr_ig_mask))
				spec.match_flags |= EFX_FILTER_MATCH_LOC_MAC_IG;
			else if (is_broadcast_ether_addr(mac_mask->h_dest))
				spec.match_flags |= EFX_FILTER_MATCH_LOC_MAC;
			else
				return -EINVAL;
			ether_addr_copy(spec.loc_mac, mac_entry->h_dest);
		}
		if (!is_zero_ether_addr(mac_mask->h_source)) {
			if (!is_broadcast_ether_addr(mac_mask->h_source))
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_REM_MAC;
			ether_addr_copy(spec.rem_mac, mac_entry->h_source);
		}
		if (mac_mask->h_proto) {
			if (mac_mask->h_proto != ETHER_TYPE_FULL_MASK)
				return -EINVAL;
			spec.match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
			spec.ether_type = mac_entry->h_proto;
		}
		break;

	default:
		return -EINVAL;
	}

	if ((rule->flow_type & FLOW_EXT) && rule->m_ext.vlan_tci) {
		if (rule->m_ext.vlan_tci != htons(0xfff))
			return -EINVAL;
		spec.match_flags |= EFX_FILTER_MATCH_OUTER_VID;
		spec.outer_vid = rule->h_ext.vlan_tci;
	}

	rc = efx_filter_insert_filter(efx, &spec, true);
	if (rc < 0)
		return rc;

	rule->location = rc;
	return 0;
}

static int efx_ethtool_set_rxnfc(struct net_device *net_dev,
				 struct ethtool_rxnfc *info)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	if (efx_filter_get_rx_id_limit(efx) == 0)
		return -EOPNOTSUPP;

	switch (info->cmd) {
	case ETHTOOL_SRXCLSRLINS:
		return efx_ethtool_set_class_rule(efx, &info->fs,
						  info->rss_context);

	case ETHTOOL_SRXCLSRLDEL:
		return efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_MANUAL,
						 info->fs.location);

	default:
		return -EOPNOTSUPP;
	}
}

static u32 efx_ethtool_get_rxfh_indir_size(struct net_device *net_dev)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	if (efx->n_rx_channels == 1)
		return 0;
	return ARRAY_SIZE(efx->rss_context.rx_indir_table);
}

static u32 efx_ethtool_get_rxfh_key_size(struct net_device *net_dev)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	return efx->type->rx_hash_key_size;
}

static int efx_ethtool_get_rxfh(struct net_device *net_dev, u32 *indir, u8 *key,
				u8 *hfunc)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int rc;

	rc = efx->type->rx_pull_rss_config(efx);
	if (rc)
		return rc;

	if (hfunc)
		*hfunc = ETH_RSS_HASH_TOP;
	if (indir)
		memcpy(indir, efx->rss_context.rx_indir_table,
		       sizeof(efx->rss_context.rx_indir_table));
	if (key)
		memcpy(key, efx->rss_context.rx_hash_key,
		       efx->type->rx_hash_key_size);
	return 0;
}

static int efx_ethtool_set_rxfh(struct net_device *net_dev, const u32 *indir,
				const u8 *key, const u8 hfunc)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	/* Hash function is Toeplitz, cannot be changed */
	if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
		return -EOPNOTSUPP;
	if (!indir && !key)
		return 0;

	if (!key)
		key = efx->rss_context.rx_hash_key;
	if (!indir)
		indir = efx->rss_context.rx_indir_table;

	return efx->type->rx_push_rss_config(efx, true, indir, key);
}

static int efx_ethtool_get_rxfh_context(struct net_device *net_dev, u32 *indir,
					u8 *key, u8 *hfunc, u32 rss_context)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_rss_context *ctx;
	int rc = 0;

	if (!efx->type->rx_pull_rss_context_config)
		return -EOPNOTSUPP;

	mutex_lock(&efx->rss_lock);
	ctx = efx_find_rss_context_entry(efx, rss_context);
	if (!ctx) {
		rc = -ENOENT;
		goto out_unlock;
	}
	rc = efx->type->rx_pull_rss_context_config(efx, ctx);
	if (rc)
		goto out_unlock;

	if (hfunc)
		*hfunc = ETH_RSS_HASH_TOP;
	if (indir)
		memcpy(indir, ctx->rx_indir_table, sizeof(ctx->rx_indir_table));
	if (key)
		memcpy(key, ctx->rx_hash_key, efx->type->rx_hash_key_size);
out_unlock:
	mutex_unlock(&efx->rss_lock);
	return rc;
}

static int efx_ethtool_set_rxfh_context(struct net_device *net_dev,
					const u32 *indir, const u8 *key,
					const u8 hfunc, u32 *rss_context,
					bool delete)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	struct efx_rss_context *ctx;
	bool allocated = false;
	int rc;

	if (!efx->type->rx_push_rss_context_config)
		return -EOPNOTSUPP;
	/* Hash function is Toeplitz, cannot be changed */
	if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
		return -EOPNOTSUPP;

	mutex_lock(&efx->rss_lock);

	if (*rss_context == ETH_RXFH_CONTEXT_ALLOC) {
		if (delete) {
			/* alloc + delete == Nothing to do */
			rc = -EINVAL;
			goto out_unlock;
		}
		ctx = efx_alloc_rss_context_entry(efx);
		if (!ctx) {
			rc = -ENOMEM;
			goto out_unlock;
		}
		ctx->context_id = EFX_MCDI_RSS_CONTEXT_INVALID;
		/* Initialise indir table and key to defaults */
		efx_set_default_rx_indir_table(efx, ctx);
		netdev_rss_key_fill(ctx->rx_hash_key, sizeof(ctx->rx_hash_key));
		allocated = true;
	} else {
		ctx = efx_find_rss_context_entry(efx, *rss_context);
		if (!ctx) {
			rc = -ENOENT;
			goto out_unlock;
		}
	}

	if (delete) {
		/* delete this context */
		rc = efx->type->rx_push_rss_context_config(efx, ctx, NULL, NULL);
		if (!rc)
			efx_free_rss_context_entry(ctx);
		goto out_unlock;
	}

	if (!key)
		key = ctx->rx_hash_key;
	if (!indir)
		indir = ctx->rx_indir_table;

	rc = efx->type->rx_push_rss_context_config(efx, ctx, indir, key);
	if (rc && allocated)
		efx_free_rss_context_entry(ctx);
	else
		*rss_context = ctx->user_id;
out_unlock:
	mutex_unlock(&efx->rss_lock);
	return rc;
}

static int efx_ethtool_get_ts_info(struct net_device *net_dev,
				   struct ethtool_ts_info *ts_info)
{
	struct efx_nic *efx = netdev_priv(net_dev);

	/* Software capabilities */
	ts_info->so_timestamping = (SOF_TIMESTAMPING_RX_SOFTWARE |
				    SOF_TIMESTAMPING_SOFTWARE);
	ts_info->phc_index = -1;

	efx_ptp_get_ts_info(efx, ts_info);
	return 0;
}

static int efx_ethtool_get_module_eeprom(struct net_device *net_dev,
					 struct ethtool_eeprom *ee,
					 u8 *data)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int ret;

	if (!efx->phy_op || !efx->phy_op->get_module_eeprom)
		return -EOPNOTSUPP;

	mutex_lock(&efx->mac_lock);
	ret = efx->phy_op->get_module_eeprom(efx, ee, data);
	mutex_unlock(&efx->mac_lock);

	return ret;
}

static int efx_ethtool_get_module_info(struct net_device *net_dev,
				       struct ethtool_modinfo *modinfo)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int ret;

	if (!efx->phy_op || !efx->phy_op->get_module_info)
		return -EOPNOTSUPP;

	mutex_lock(&efx->mac_lock);
	ret = efx->phy_op->get_module_info(efx, modinfo);
	mutex_unlock(&efx->mac_lock);

	return ret;
}

static int efx_ethtool_get_fecparam(struct net_device *net_dev,
				    struct ethtool_fecparam *fecparam)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int rc;

	if (!efx->phy_op || !efx->phy_op->get_fecparam)
		return -EOPNOTSUPP;
	mutex_lock(&efx->mac_lock);
	rc = efx->phy_op->get_fecparam(efx, fecparam);
	mutex_unlock(&efx->mac_lock);

	return rc;
}

static int efx_ethtool_set_fecparam(struct net_device *net_dev,
				    struct ethtool_fecparam *fecparam)
{
	struct efx_nic *efx = netdev_priv(net_dev);
	int rc;

	if (!efx->phy_op || !efx->phy_op->get_fecparam)
		return -EOPNOTSUPP;
	mutex_lock(&efx->mac_lock);
	rc = efx->phy_op->set_fecparam(efx, fecparam);
	mutex_unlock(&efx->mac_lock);

	return rc;
}

const struct ethtool_ops efx_ethtool_ops = {
	.get_drvinfo		= efx_ethtool_get_drvinfo,
	.get_regs_len		= efx_ethtool_get_regs_len,
	.get_regs		= efx_ethtool_get_regs,
	.get_msglevel		= efx_ethtool_get_msglevel,
	.set_msglevel		= efx_ethtool_set_msglevel,
	.nway_reset		= efx_ethtool_nway_reset,
	.get_link		= ethtool_op_get_link,
	.get_coalesce		= efx_ethtool_get_coalesce,
	.set_coalesce		= efx_ethtool_set_coalesce,
	.get_ringparam		= efx_ethtool_get_ringparam,
	.set_ringparam		= efx_ethtool_set_ringparam,
	.get_pauseparam         = efx_ethtool_get_pauseparam,
	.set_pauseparam         = efx_ethtool_set_pauseparam,
	.get_sset_count		= efx_ethtool_get_sset_count,
	.self_test		= efx_ethtool_self_test,
	.get_strings		= efx_ethtool_get_strings,
	.set_phys_id		= efx_ethtool_phys_id,
	.get_ethtool_stats	= efx_ethtool_get_stats,
	.get_wol                = efx_ethtool_get_wol,
	.set_wol                = efx_ethtool_set_wol,
	.reset			= efx_ethtool_reset,
	.get_rxnfc		= efx_ethtool_get_rxnfc,
	.set_rxnfc		= efx_ethtool_set_rxnfc,
	.get_rxfh_indir_size	= efx_ethtool_get_rxfh_indir_size,
	.get_rxfh_key_size	= efx_ethtool_get_rxfh_key_size,
	.get_rxfh		= efx_ethtool_get_rxfh,
	.set_rxfh		= efx_ethtool_set_rxfh,
	.get_rxfh_context	= efx_ethtool_get_rxfh_context,
	.set_rxfh_context	= efx_ethtool_set_rxfh_context,
	.get_ts_info		= efx_ethtool_get_ts_info,
	.get_module_info	= efx_ethtool_get_module_info,
	.get_module_eeprom	= efx_ethtool_get_module_eeprom,
	.get_link_ksettings	= efx_ethtool_get_link_ksettings,
	.set_link_ksettings	= efx_ethtool_set_link_ksettings,
	.get_fecparam		= efx_ethtool_get_fecparam,
	.set_fecparam		= efx_ethtool_set_fecparam,
};