linux/drivers/s390/net/qeth_ethtool.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright IBM Corp. 2018
 */

#define KMSG_COMPONENT "qeth"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/ethtool.h>
#include "qeth_core.h"

static struct {
	const char str[ETH_GSTRING_LEN];
} qeth_ethtool_stats_keys[] = {
/*  0 */{"rx skbs"},
	{"rx buffers"},
	{"tx skbs"},
	{"tx buffers"},
	{"tx skbs no packing"},
	{"tx buffers no packing"},
	{"tx skbs packing"},
	{"tx buffers packing"},
	{"tx sg skbs"},
	{"tx buffer elements"},
/* 10 */{"rx sg skbs"},
	{"rx sg frags"},
	{"rx sg page allocs"},
	{"tx large kbytes"},
	{"tx large count"},
	{"tx pk state ch n->p"},
	{"tx pk state ch p->n"},
	{"tx pk watermark low"},
	{"tx pk watermark high"},
	{"queue 0 buffer usage"},
/* 20 */{"queue 1 buffer usage"},
	{"queue 2 buffer usage"},
	{"queue 3 buffer usage"},
	{"tx csum"},
	{"tx lin"},
	{"tx linfail"},
	{"rx csum"}
};

static int qeth_get_sset_count(struct net_device *dev, int stringset)
{
	switch (stringset) {
	case ETH_SS_STATS:
		return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
	default:
		return -EINVAL;
	}
}

static void qeth_get_ethtool_stats(struct net_device *dev,
				   struct ethtool_stats *stats, u64 *data)
{
	struct qeth_card *card = dev->ml_priv;

	data[0] = card->stats.rx_packets -
				card->perf_stats.initial_rx_packets;
	data[1] = card->perf_stats.bufs_rec;
	data[2] = card->stats.tx_packets -
				card->perf_stats.initial_tx_packets;
	data[3] = card->perf_stats.bufs_sent;
	data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
			- card->perf_stats.skbs_sent_pack;
	data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
	data[6] = card->perf_stats.skbs_sent_pack;
	data[7] = card->perf_stats.bufs_sent_pack;
	data[8] = card->perf_stats.sg_skbs_sent;
	data[9] = card->perf_stats.buf_elements_sent;
	data[10] = card->perf_stats.sg_skbs_rx;
	data[11] = card->perf_stats.sg_frags_rx;
	data[12] = card->perf_stats.sg_alloc_page_rx;
	data[13] = (card->perf_stats.large_send_bytes >> 10);
	data[14] = card->perf_stats.large_send_cnt;
	data[15] = card->perf_stats.sc_dp_p;
	data[16] = card->perf_stats.sc_p_dp;
	data[17] = QETH_LOW_WATERMARK_PACK;
	data[18] = QETH_HIGH_WATERMARK_PACK;
	data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
	data[20] = (card->qdio.no_out_queues > 1) ?
			atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
	data[21] = (card->qdio.no_out_queues > 2) ?
			atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
	data[22] = (card->qdio.no_out_queues > 3) ?
			atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
	data[23] = card->perf_stats.tx_csum;
	data[24] = card->perf_stats.tx_lin;
	data[25] = card->perf_stats.tx_linfail;
	data[26] = card->perf_stats.rx_csum;
}

static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
{
	switch (stringset) {
	case ETH_SS_STATS:
		memcpy(data, &qeth_ethtool_stats_keys,
			sizeof(qeth_ethtool_stats_keys));
		break;
	default:
		WARN_ON(1);
		break;
	}
}

static void qeth_get_drvinfo(struct net_device *dev,
			     struct ethtool_drvinfo *info)
{
	struct qeth_card *card = dev->ml_priv;

	strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
		sizeof(info->driver));
	strlcpy(info->version, "1.0", sizeof(info->version));
	strlcpy(info->fw_version, card->info.mcl_level,
		sizeof(info->fw_version));
	snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
		 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
}

/* Helper function to fill 'advertising' and 'supported' which are the same. */
/* Autoneg and full-duplex are supported and advertised unconditionally.     */
/* Always advertise and support all speeds up to specified, and only one     */
/* specified port type.							     */
static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
				int maxspeed, int porttype)
{
	ethtool_link_ksettings_zero_link_mode(cmd, supported);
	ethtool_link_ksettings_zero_link_mode(cmd, advertising);
	ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);

	ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
	ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);

	switch (porttype) {
	case PORT_TP:
		ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
		ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
		break;
	case PORT_FIBRE:
		ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
		ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
		break;
	default:
		ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
		ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
		WARN_ON_ONCE(1);
	}

	/* partially does fall through, to also select lower speeds */
	switch (maxspeed) {
	case SPEED_25000:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     25000baseSR_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     25000baseSR_Full);
		break;
	case SPEED_10000:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10000baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10000baseT_Full);
		/* fall through */
	case SPEED_1000:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     1000baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     1000baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     1000baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     1000baseT_Half);
		/* fall through */
	case SPEED_100:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     100baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     100baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     100baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     100baseT_Half);
		/* fall through */
	case SPEED_10:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Half);
		break;
	default:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Half);
		WARN_ON_ONCE(1);
	}
}


static int qeth_get_link_ksettings(struct net_device *netdev,
				   struct ethtool_link_ksettings *cmd)
{
	struct qeth_card *card = netdev->ml_priv;
	enum qeth_link_types link_type;
	struct carrier_info carrier_info;
	int rc;

	if (IS_IQD(card) || IS_VM_NIC(card))
		link_type = QETH_LINK_TYPE_10GBIT_ETH;
	else
		link_type = card->info.link_type;

	cmd->base.duplex = DUPLEX_FULL;
	cmd->base.autoneg = AUTONEG_ENABLE;
	cmd->base.phy_address = 0;
	cmd->base.mdio_support = 0;
	cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
	cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;

	switch (link_type) {
	case QETH_LINK_TYPE_FAST_ETH:
	case QETH_LINK_TYPE_LANE_ETH100:
		cmd->base.speed = SPEED_100;
		cmd->base.port = PORT_TP;
		break;
	case QETH_LINK_TYPE_GBIT_ETH:
	case QETH_LINK_TYPE_LANE_ETH1000:
		cmd->base.speed = SPEED_1000;
		cmd->base.port = PORT_FIBRE;
		break;
	case QETH_LINK_TYPE_10GBIT_ETH:
		cmd->base.speed = SPEED_10000;
		cmd->base.port = PORT_FIBRE;
		break;
	case QETH_LINK_TYPE_25GBIT_ETH:
		cmd->base.speed = SPEED_25000;
		cmd->base.port = PORT_FIBRE;
		break;
	default:
		cmd->base.speed = SPEED_10;
		cmd->base.port = PORT_TP;
	}
	qeth_set_cmd_adv_sup(cmd, cmd->base.speed, cmd->base.port);

	/* Check if we can obtain more accurate information.	 */
	/* If QUERY_CARD_INFO command is not supported or fails, */
	/* just return the heuristics that was filled above.	 */
	rc = qeth_query_card_info(card, &carrier_info);
	if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
		return 0;
	if (rc) /* report error from the hardware operation */
		return rc;
	/* on success, fill in the information got from the hardware */

	netdev_dbg(netdev,
	"card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
			carrier_info.card_type,
			carrier_info.port_mode,
			carrier_info.port_speed);

	/* Update attributes for which we've obtained more authoritative */
	/* information, leave the rest the way they where filled above.  */
	switch (carrier_info.card_type) {
	case CARD_INFO_TYPE_1G_COPPER_A:
	case CARD_INFO_TYPE_1G_COPPER_B:
		cmd->base.port = PORT_TP;
		qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
		break;
	case CARD_INFO_TYPE_1G_FIBRE_A:
	case CARD_INFO_TYPE_1G_FIBRE_B:
		cmd->base.port = PORT_FIBRE;
		qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
		break;
	case CARD_INFO_TYPE_10G_FIBRE_A:
	case CARD_INFO_TYPE_10G_FIBRE_B:
		cmd->base.port = PORT_FIBRE;
		qeth_set_cmd_adv_sup(cmd, SPEED_10000, cmd->base.port);
		break;
	}

	switch (carrier_info.port_mode) {
	case CARD_INFO_PORTM_FULLDUPLEX:
		cmd->base.duplex = DUPLEX_FULL;
		break;
	case CARD_INFO_PORTM_HALFDUPLEX:
		cmd->base.duplex = DUPLEX_HALF;
		break;
	}

	switch (carrier_info.port_speed) {
	case CARD_INFO_PORTS_10M:
		cmd->base.speed = SPEED_10;
		break;
	case CARD_INFO_PORTS_100M:
		cmd->base.speed = SPEED_100;
		break;
	case CARD_INFO_PORTS_1G:
		cmd->base.speed = SPEED_1000;
		break;
	case CARD_INFO_PORTS_10G:
		cmd->base.speed = SPEED_10000;
		break;
	case CARD_INFO_PORTS_25G:
		cmd->base.speed = SPEED_25000;
		break;
	}

	return 0;
}

const struct ethtool_ops qeth_ethtool_ops = {
	.get_link = ethtool_op_get_link,
	.get_strings = qeth_get_strings,
	.get_ethtool_stats = qeth_get_ethtool_stats,
	.get_sset_count = qeth_get_sset_count,
	.get_drvinfo = qeth_get_drvinfo,
	.get_link_ksettings = qeth_get_link_ksettings,
};

const struct ethtool_ops qeth_osn_ethtool_ops = {
	.get_strings = qeth_get_strings,
	.get_ethtool_stats = qeth_get_ethtool_stats,
	.get_sset_count = qeth_get_sset_count,
	.get_drvinfo = qeth_get_drvinfo,
};