[PATCH V6 net-next 7/8] net: hns3: Add Ethtool support to HNS3 driver

[Salil Mehta]

This patch adds the support of the Ethtool interface to
the HNS3 Ethernet driver. Various commands to read the
statistics, configure the offloading, loopback selftest etc.
are supported.

Signed-off-by: Daode Huang <huangdaode@xxxxxxxxxxxxx>
Signed-off-by: lipeng <lipeng321@xxxxxxxxxx>
Signed-off-by: Salil Mehta <salil.mehta@xxxxxxxxxx>
Signed-off-by: Yisen Zhuang <yisen.zhuang@xxxxxxxxxx>
---
Patch V6: addressed below comments
 1. Andrew Lunn
    https://lkml.org/lkml/2017/7/28/745
Patch V5: addressed below comments
 1. Florian Fainelli
    https://lkml.org/lkml/2017/7/23/94
 2. Stephen Hemminger
    https://lkml.org/lkml/2017/7/23/101
Patch V4: addressed below comments
 1. Andrew Lunn
    Removed the support of loop PHY back for now
Patch V3: Address below comments
 1. Stephen Hemminger
    https://lkml.org/lkml/2017/6/13/974
 2. Andrew Lunn
    https://lkml.org/lkml/2017/6/13/1037
Patch V2: No change
Patch V1: Initial Submit
---
 .../ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c  | 482 +++++++++++++++++++++
 1 file changed, 482 insertions(+)
 create mode 100644 drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c
new file mode 100644
index 0000000..0ad65e4
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c
@@ -0,0 +1,482 @@
+/*
+ * Copyright (c) 2016~2017 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/string.h>
+
+#include "hns3_enet.h"
+
+struct hns3_stats {
+	char stats_string[ETH_GSTRING_LEN];
+	int stats_size;
+	int stats_offset;
+};
+
+/* tqp related stats */
+#define HNS3_TQP_STAT(_string, _member)	{			\
+	.stats_string = _string,				\
+	.stats_size = FIELD_SIZEOF(struct ring_stats, _member),	\
+	.stats_offset = offsetof(struct hns3_enet_ring, stats),	\
+}								\
+
+static const struct hns3_stats hns3_txq_stats[] = {
+	/* Tx per-queue statistics */
+	HNS3_TQP_STAT("tx_io_err_cnt", io_err_cnt),
+	HNS3_TQP_STAT("tx_sw_err_cnt", sw_err_cnt),
+	HNS3_TQP_STAT("tx_seg_pkt_cnt", seg_pkt_cnt),
+	HNS3_TQP_STAT("tx_pkts", tx_pkts),
+	HNS3_TQP_STAT("tx_bytes", tx_bytes),
+	HNS3_TQP_STAT("tx_err_cnt", tx_err_cnt),
+	HNS3_TQP_STAT("tx_restart_queue", restart_queue),
+	HNS3_TQP_STAT("tx_busy", tx_busy),
+};
+
+#define HNS3_TXQ_STATS_COUNT ARRAY_SIZE(hns3_txq_stats)
+
+static const struct hns3_stats hns3_rxq_stats[] = {
+	/* Rx per-queue statistics */
+	HNS3_TQP_STAT("rx_io_err_cnt", io_err_cnt),
+	HNS3_TQP_STAT("rx_sw_err_cnt", sw_err_cnt),
+	HNS3_TQP_STAT("rx_seg_pkt_cnt", seg_pkt_cnt),
+	HNS3_TQP_STAT("rx_pkts", rx_pkts),
+	HNS3_TQP_STAT("rx_bytes", rx_bytes),
+	HNS3_TQP_STAT("rx_err_cnt", rx_err_cnt),
+	HNS3_TQP_STAT("rx_reuse_pg_cnt", reuse_pg_cnt),
+	HNS3_TQP_STAT("rx_err_pkt_len", err_pkt_len),
+	HNS3_TQP_STAT("rx_non_vld_descs", non_vld_descs),
+	HNS3_TQP_STAT("rx_err_bd_num", err_bd_num),
+	HNS3_TQP_STAT("rx_l2_err", l2_err),
+	HNS3_TQP_STAT("rx_l3l4_csum_err", l3l4_csum_err),
+};
+
+#define HNS3_RXQ_STATS_COUNT ARRAY_SIZE(hns3_rxq_stats)
+
+#define HNS3_TQP_STATS_COUNT (HNS3_TXQ_STATS_COUNT + HNS3_RXQ_STATS_COUNT)
+
+struct hns3_link_mode_mapping {
+	u32 hns3_link_mode;
+	u32 ethtool_link_mode;
+};
+
+static const struct hns3_link_mode_mapping hns3_lm_map[] = {
+	{HNS3_LM_FIBRE_BIT, ETHTOOL_LINK_MODE_FIBRE_BIT},
+	{HNS3_LM_AUTONEG_BIT, ETHTOOL_LINK_MODE_Autoneg_BIT},
+	{HNS3_LM_TP_BIT, ETHTOOL_LINK_MODE_TP_BIT},
+	{HNS3_LM_PAUSE_BIT, ETHTOOL_LINK_MODE_Pause_BIT},
+	{HNS3_LM_BACKPLANE_BIT, ETHTOOL_LINK_MODE_Backplane_BIT},
+	{HNS3_LM_10BASET_HALF_BIT, ETHTOOL_LINK_MODE_10baseT_Half_BIT},
+	{HNS3_LM_10BASET_FULL_BIT, ETHTOOL_LINK_MODE_10baseT_Full_BIT},
+	{HNS3_LM_100BASET_HALF_BIT, ETHTOOL_LINK_MODE_100baseT_Half_BIT},
+	{HNS3_LM_100BASET_FULL_BIT, ETHTOOL_LINK_MODE_100baseT_Full_BIT},
+	{HNS3_LM_1000BASET_FULL_BIT, ETHTOOL_LINK_MODE_1000baseT_Full_BIT},
+};
+
+static void hns3_driv_to_eth_caps(u32 caps, struct ethtool_link_ksettings *cmd,
+				  bool is_advertised)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(hns3_lm_map); i++) {
+		if (!(caps & hns3_lm_map[i].hns3_link_mode))
+			continue;
+
+		if (is_advertised) {
+			ethtool_link_ksettings_zero_link_mode(cmd,
+							      advertising);
+			__set_bit(hns3_lm_map[i].ethtool_link_mode,
+				  cmd->link_modes.advertising);
+		} else {
+			ethtool_link_ksettings_zero_link_mode(cmd,
+							      supported);
+			__set_bit(hns3_lm_map[i].ethtool_link_mode,
+				  cmd->link_modes.supported);
+		}
+	}
+}
+
+static int hns3_get_sset_count(struct net_device *netdev, int stringset)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+	const struct hnae3_ae_ops *ops = h->ae_algo->ops;
+
+	if (!ops->get_sset_count)
+		return -EOPNOTSUPP;
+
+	switch (stringset) {
+	case ETH_SS_STATS:
+		return ((HNS3_TQP_STATS_COUNT * h->kinfo.num_tqps) +
+			ops->get_sset_count(h, stringset));
+
+	case ETH_SS_TEST:
+		return ops->get_sset_count(h, stringset);
+	}
+
+	return 0;
+}
+
+static void *hns3_update_strings(u8 *data, const struct hns3_stats *stats,
+				 u32 stat_count, u32 num_tqps)
+{
+#define MAX_PREFIX_SIZE (8 + 4)
+	u32 size_left;
+	u32 i, j;
+	u32 n1;
+
+	for (i = 0; i < num_tqps; i++) {
+		for (j = 0; j < stat_count; j++) {
+			data[ETH_GSTRING_LEN - 1] = '\0';
+
+			/* first, prepend the prefix string */
+			n1 = snprintf(data, MAX_PREFIX_SIZE, "rcb_q%d_", i);
+			n1 = min_t(uint, n1, MAX_PREFIX_SIZE - 1);
+			size_left = (ETH_GSTRING_LEN - 1) - n1;
+
+			/* now, concatenate the stats string to it */
+			strncat(data, stats[j].stats_string, size_left);
+			data += ETH_GSTRING_LEN;
+		}
+	}
+
+	return data;
+}
+
+static u8 *hns3_get_strings_tqps(struct hnae3_handle *handle, u8 *data)
+{
+	struct hnae3_knic_private_info *kinfo = &handle->kinfo;
+
+	/* get strings for Tx */
+	data = hns3_update_strings(data, hns3_txq_stats, HNS3_TXQ_STATS_COUNT,
+				   kinfo->num_tqps);
+
+	/* get strings for Rx */
+	data = hns3_update_strings(data, hns3_rxq_stats, HNS3_RXQ_STATS_COUNT,
+				   kinfo->num_tqps);
+
+	return data;
+}
+
+static void hns3_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+	const struct hnae3_ae_ops *ops = h->ae_algo->ops;
+	char *buff = (char *)data;
+
+	if (!ops->get_strings)
+		return;
+
+	switch (stringset) {
+	case ETH_SS_STATS:
+		buff = hns3_get_strings_tqps(h, buff);
+		h->ae_algo->ops->get_strings(h, stringset, (u8 *)buff);
+		break;
+	case ETH_SS_TEST:
+		ops->get_strings(h, stringset, data);
+		break;
+	}
+}
+
+static u64 *hns3_get_stats_tqps(struct hnae3_handle *handle, u64 *data)
+{
+	struct hns3_nic_priv *nic_priv = (struct hns3_nic_priv *)handle->priv;
+	struct hnae3_knic_private_info *kinfo = &handle->kinfo;
+	struct hns3_enet_ring *ring;
+	u8 *stat;
+	u32 i;
+
+	/* get stats for Tx */
+	for (i = 0; i < kinfo->num_tqps; i++) {
+		ring = nic_priv->ring_data[i].ring;
+		for (i = 0; i < HNS3_TXQ_STATS_COUNT; i++) {
+			stat = (u8 *)ring + hns3_txq_stats[i].stats_offset;
+			*data++ = *(u64 *)stat;
+		}
+	}
+
+	/* get stats for Rx */
+	for (i = 0; i < kinfo->num_tqps; i++) {
+		ring = nic_priv->ring_data[i + kinfo->num_tqps].ring;
+		for (i = 0; i < HNS3_RXQ_STATS_COUNT; i++) {
+			stat = (u8 *)ring + hns3_rxq_stats[i].stats_offset;
+			*data++ = *(u64 *)stat;
+		}
+	}
+
+	return data;
+}
+
+/* hns3_get_stats - get detail statistics.
+ * @netdev: net device
+ * @stats: statistics info.
+ * @data: statistics data.
+ */
+void hns3_get_stats(struct net_device *netdev, struct ethtool_stats *stats,
+		    u64 *data)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+	u64 *p = data;
+
+	if (!h->ae_algo->ops->get_stats || !h->ae_algo->ops->update_stats) {
+		netdev_err(netdev, "could not get any statistics\n");
+		return;
+	}
+
+	h->ae_algo->ops->update_stats(h, &netdev->stats);
+
+	/* get per-queue stats */
+	p = hns3_get_stats_tqps(h, p);
+
+	/* get MAC & other misc hardware stats */
+	h->ae_algo->ops->get_stats(h, p);
+}
+
+static void hns3_get_drvinfo(struct net_device *netdev,
+			     struct ethtool_drvinfo *drvinfo)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+
+	strncpy(drvinfo->version, hns3_driver_version,
+		sizeof(drvinfo->version));
+	drvinfo->version[sizeof(drvinfo->version) - 1] = '\0';
+
+	strncpy(drvinfo->driver, h->pdev->driver->name,
+		sizeof(drvinfo->driver));
+	drvinfo->driver[sizeof(drvinfo->driver) - 1] = '\0';
+
+	strncpy(drvinfo->bus_info, pci_name(h->pdev),
+		sizeof(drvinfo->bus_info));
+	drvinfo->bus_info[ETHTOOL_BUSINFO_LEN - 1] = '\0';
+
+	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "0x%08x",
+		 priv->ae_handle->ae_algo->ops->get_fw_version(h));
+}
+
+static u32 hns3_get_link(struct net_device *netdev)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h;
+
+	h = priv->ae_handle;
+
+	if (h->ae_algo && h->ae_algo->ops && h->ae_algo->ops->get_status)
+		return h->ae_algo->ops->get_status(h);
+	else
+		return 0;
+}
+
+static void hns3_get_ringparam(struct net_device *netdev,
+			       struct ethtool_ringparam *param)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	int queue_num = priv->ae_handle->kinfo.num_tqps;
+
+	param->tx_max_pending = HNS3_RING_MAX_PENDING;
+	param->rx_max_pending = HNS3_RING_MAX_PENDING;
+
+	param->tx_pending = priv->ring_data[0].ring->desc_num;
+	param->rx_pending = priv->ring_data[queue_num].ring->desc_num;
+}
+
+static void hns3_get_pauseparam(struct net_device *netdev,
+				struct ethtool_pauseparam *param)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+
+	if (h->ae_algo && h->ae_algo->ops && h->ae_algo->ops->get_pauseparam)
+		h->ae_algo->ops->get_pauseparam(h, &param->autoneg,
+			&param->rx_pause, &param->tx_pause);
+}
+
+static int hns3_get_link_ksettings(struct net_device *netdev,
+				   struct ethtool_link_ksettings *cmd)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+	u32 supported_caps;
+	u32 advertised_caps;
+	u8 media_type;
+	u8 link_stat;
+	u8 auto_neg;
+	u8 duplex;
+	u32 speed;
+
+	if (!h->ae_algo || !h->ae_algo->ops)
+		return -EOPNOTSUPP;
+
+	/* 1.auto_neg&speed&duplex from cmd */
+	if (h->ae_algo->ops->get_ksettings_an_result) {
+		h->ae_algo->ops->get_ksettings_an_result(h, &auto_neg,
+							 &speed, &duplex);
+		cmd->base.autoneg = auto_neg;
+		cmd->base.speed = speed;
+		cmd->base.duplex = duplex;
+
+		link_stat = hns3_get_link(netdev);
+		if (!link_stat) {
+			cmd->base.speed = (u32)SPEED_UNKNOWN;
+			cmd->base.duplex = DUPLEX_UNKNOWN;
+		}
+	}
+
+	/* 2.media_type get from bios parameter block */
+	if (h->ae_algo->ops->get_media_type)
+		h->ae_algo->ops->get_media_type(h, &media_type);
+
+	switch (media_type) {
+	case HNAE3_MEDIA_TYPE_FIBER:
+		cmd->base.port = PORT_FIBRE;
+		supported_caps = HNS3_LM_FIBRE_BIT | HNS3_LM_AUTONEG_BIT |
+			HNS3_LM_PAUSE_BIT | HNS3_LM_1000BASET_FULL_BIT;
+
+		advertised_caps = supported_caps;
+		break;
+	case HNAE3_MEDIA_TYPE_COPPER:
+		cmd->base.port = PORT_TP;
+		supported_caps = HNS3_LM_TP_BIT | HNS3_LM_AUTONEG_BIT |
+			HNS3_LM_PAUSE_BIT | HNS3_LM_1000BASET_FULL_BIT |
+			HNS3_LM_100BASET_FULL_BIT | HNS3_LM_100BASET_HALF_BIT |
+			HNS3_LM_10BASET_FULL_BIT | HNS3_LM_10BASET_HALF_BIT;
+		advertised_caps = supported_caps;
+		break;
+	case HNAE3_MEDIA_TYPE_BACKPLANE:
+		cmd->base.port = PORT_NONE;
+		supported_caps = HNS3_LM_BACKPLANE_BIT | HNS3_LM_PAUSE_BIT |
+			HNS3_LM_AUTONEG_BIT | HNS3_LM_1000BASET_FULL_BIT |
+			HNS3_LM_100BASET_FULL_BIT | HNS3_LM_100BASET_HALF_BIT |
+			HNS3_LM_10BASET_FULL_BIT | HNS3_LM_10BASET_HALF_BIT;
+
+		advertised_caps = supported_caps;
+		break;
+	case HNAE3_MEDIA_TYPE_UNKNOWN:
+	default:
+		cmd->base.port = PORT_OTHER;
+		supported_caps = 0;
+		advertised_caps = 0;
+		break;
+	}
+
+	/* now, map driver link modes to ethtool link modes */
+	hns3_driv_to_eth_caps(supported_caps, cmd, false);
+	hns3_driv_to_eth_caps(advertised_caps, cmd, true);
+
+	/* 3.mdix_ctrl&mdix get from phy reg */
+	if (h->ae_algo->ops->get_mdix_mode)
+		h->ae_algo->ops->get_mdix_mode(h, &cmd->base.eth_tp_mdix_ctrl,
+			&cmd->base.eth_tp_mdix);
+	/* 4.mdio_support */
+	cmd->base.mdio_support = ETH_MDIO_SUPPORTS_C22;
+
+	return 0;
+}
+
+static u32 hns3_get_rss_key_size(struct net_device *netdev)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+
+	if (!h->ae_algo || !h->ae_algo->ops ||
+	    !h->ae_algo->ops->get_rss_key_size)
+		return -EOPNOTSUPP;
+
+	return h->ae_algo->ops->get_rss_key_size(h);
+}
+
+static u32 hns3_get_rss_indir_size(struct net_device *netdev)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+
+	if (!h->ae_algo || !h->ae_algo->ops ||
+	    !h->ae_algo->ops->get_rss_indir_size)
+		return -EOPNOTSUPP;
+
+	return h->ae_algo->ops->get_rss_indir_size(h);
+}
+
+static int hns3_get_rss(struct net_device *netdev, u32 *indir, u8 *key,
+			u8 *hfunc)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+
+	if (!h->ae_algo || !h->ae_algo->ops || !h->ae_algo->ops->get_rss)
+		return -EOPNOTSUPP;
+
+	return h->ae_algo->ops->get_rss(h, indir, key, hfunc);
+}
+
+static int hns3_set_rss(struct net_device *netdev, const u32 *indir,
+			const u8 *key, const u8 hfunc)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+
+	if (!h->ae_algo || !h->ae_algo->ops || !h->ae_algo->ops->set_rss)
+		return -EOPNOTSUPP;
+
+	/* currently we only support Toeplitz hash */
+	if ((hfunc != ETH_RSS_HASH_NO_CHANGE) && (hfunc != ETH_RSS_HASH_TOP)) {
+		netdev_err(netdev,
+			   "hash func not supported (only Toeplitz hash)\n");
+		return -EOPNOTSUPP;
+	}
+	if (!indir) {
+		netdev_err(netdev,
+			   "set rss failed for indir is empty\n");
+		return -EOPNOTSUPP;
+	}
+
+	return h->ae_algo->ops->set_rss(h, indir, key, hfunc);
+}
+
+static int hns3_get_rxnfc(struct net_device *netdev,
+			  struct ethtool_rxnfc *cmd,
+			  u32 *rule_locs)
+{
+	struct hns3_nic_priv *priv = netdev_priv(netdev);
+	struct hnae3_handle *h = priv->ae_handle;
+
+	if (!h->ae_algo || !h->ae_algo->ops || !h->ae_algo->ops->get_tc_size)
+		return -EOPNOTSUPP;
+
+	switch (cmd->cmd) {
+	case ETHTOOL_GRXRINGS:
+		cmd->data = h->ae_algo->ops->get_tc_size(h);
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static const struct ethtool_ops hns3_ethtool_ops = {
+	.get_drvinfo = hns3_get_drvinfo,
+	.get_link = hns3_get_link,
+	.get_ringparam = hns3_get_ringparam,
+	.get_pauseparam = hns3_get_pauseparam,
+	.get_strings = hns3_get_strings,
+	.get_ethtool_stats = hns3_get_stats,
+	.get_sset_count = hns3_get_sset_count,
+	.get_rxnfc = hns3_get_rxnfc,
+	.get_rxfh_key_size = hns3_get_rss_key_size,
+	.get_rxfh_indir_size = hns3_get_rss_indir_size,
+	.get_rxfh = hns3_get_rss,
+	.set_rxfh = hns3_set_rss,
+	.get_link_ksettings = hns3_get_link_ksettings,
+};
+
+void hns3_ethtool_set_ops(struct net_device *netdev)
+{
+	netdev->ethtool_ops = &hns3_ethtool_ops;
+}
-- 
2.7.4