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path: root/drivers/s390/net/qeth_ethtool.c
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Diffstat (limited to 'drivers/s390/net/qeth_ethtool.c')
-rw-r--r--drivers/s390/net/qeth_ethtool.c465
1 files changed, 465 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_ethtool.c b/drivers/s390/net/qeth_ethtool.c
new file mode 100644
index 000000000..e250f4953
--- /dev/null
+++ b/drivers/s390/net/qeth_ethtool.c
@@ -0,0 +1,465 @@
+// 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"
+
+
+#define QETH_TXQ_STAT(_name, _stat) { \
+ .name = _name, \
+ .offset = offsetof(struct qeth_out_q_stats, _stat) \
+}
+
+#define QETH_CARD_STAT(_name, _stat) { \
+ .name = _name, \
+ .offset = offsetof(struct qeth_card_stats, _stat) \
+}
+
+struct qeth_stats {
+ char name[ETH_GSTRING_LEN];
+ unsigned int offset;
+};
+
+static const struct qeth_stats txq_stats[] = {
+ QETH_TXQ_STAT("IO buffers", bufs),
+ QETH_TXQ_STAT("IO buffer elements", buf_elements),
+ QETH_TXQ_STAT("packed IO buffers", bufs_pack),
+ QETH_TXQ_STAT("skbs", tx_packets),
+ QETH_TXQ_STAT("packed skbs", skbs_pack),
+ QETH_TXQ_STAT("SG skbs", skbs_sg),
+ QETH_TXQ_STAT("HW csum skbs", skbs_csum),
+ QETH_TXQ_STAT("TSO skbs", skbs_tso),
+ QETH_TXQ_STAT("linearized skbs", skbs_linearized),
+ QETH_TXQ_STAT("linearized+error skbs", skbs_linearized_fail),
+ QETH_TXQ_STAT("TSO bytes", tso_bytes),
+ QETH_TXQ_STAT("Packing mode switches", packing_mode_switch),
+ QETH_TXQ_STAT("Queue stopped", stopped),
+ QETH_TXQ_STAT("Doorbell", doorbell),
+ QETH_TXQ_STAT("IRQ for frames", coal_frames),
+ QETH_TXQ_STAT("Completion IRQ", completion_irq),
+ QETH_TXQ_STAT("Completion yield", completion_yield),
+ QETH_TXQ_STAT("Completion timer", completion_timer),
+};
+
+static const struct qeth_stats card_stats[] = {
+ QETH_CARD_STAT("rx0 IO buffers", rx_bufs),
+ QETH_CARD_STAT("rx0 HW csum skbs", rx_skb_csum),
+ QETH_CARD_STAT("rx0 SG skbs", rx_sg_skbs),
+ QETH_CARD_STAT("rx0 SG page frags", rx_sg_frags),
+ QETH_CARD_STAT("rx0 SG page allocs", rx_sg_alloc_page),
+ QETH_CARD_STAT("rx0 dropped, no memory", rx_dropped_nomem),
+ QETH_CARD_STAT("rx0 dropped, bad format", rx_dropped_notsupp),
+ QETH_CARD_STAT("rx0 dropped, runt", rx_dropped_runt),
+};
+
+#define TXQ_STATS_LEN ARRAY_SIZE(txq_stats)
+#define CARD_STATS_LEN ARRAY_SIZE(card_stats)
+
+static void qeth_add_stat_data(u64 **dst, void *src,
+ const struct qeth_stats stats[],
+ unsigned int size)
+{
+ unsigned int i;
+ char *stat;
+
+ for (i = 0; i < size; i++) {
+ stat = (char *)src + stats[i].offset;
+ **dst = *(u64 *)stat;
+ (*dst)++;
+ }
+}
+
+static void qeth_add_stat_strings(u8 **data, const char *prefix,
+ const struct qeth_stats stats[],
+ unsigned int size)
+{
+ unsigned int i;
+
+ for (i = 0; i < size; i++)
+ ethtool_sprintf(data, "%s%s", prefix, stats[i].name);
+}
+
+static int qeth_get_sset_count(struct net_device *dev, int stringset)
+{
+ struct qeth_card *card = dev->ml_priv;
+
+ switch (stringset) {
+ case ETH_SS_STATS:
+ return CARD_STATS_LEN +
+ card->qdio.no_out_queues * TXQ_STATS_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;
+ unsigned int i;
+
+ qeth_add_stat_data(&data, &card->stats, card_stats, CARD_STATS_LEN);
+ for (i = 0; i < card->qdio.no_out_queues; i++)
+ qeth_add_stat_data(&data, &card->qdio.out_qs[i]->stats,
+ txq_stats, TXQ_STATS_LEN);
+}
+
+static void __qeth_set_coalesce(struct net_device *dev,
+ struct qeth_qdio_out_q *queue,
+ struct ethtool_coalesce *coal)
+{
+ WRITE_ONCE(queue->coalesce_usecs, coal->tx_coalesce_usecs);
+ WRITE_ONCE(queue->max_coalesced_frames, coal->tx_max_coalesced_frames);
+
+ if (coal->tx_coalesce_usecs &&
+ netif_running(dev) &&
+ !qeth_out_queue_is_empty(queue))
+ qeth_tx_arm_timer(queue, coal->tx_coalesce_usecs);
+}
+
+static int qeth_set_coalesce(struct net_device *dev,
+ struct ethtool_coalesce *coal,
+ struct kernel_ethtool_coalesce *kernel_coal,
+ struct netlink_ext_ack *extack)
+{
+ struct qeth_card *card = dev->ml_priv;
+ struct qeth_qdio_out_q *queue;
+ unsigned int i;
+
+ if (!IS_IQD(card))
+ return -EOPNOTSUPP;
+
+ if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
+ return -EINVAL;
+
+ qeth_for_each_output_queue(card, queue, i)
+ __qeth_set_coalesce(dev, queue, coal);
+
+ return 0;
+}
+
+static void qeth_get_ringparam(struct net_device *dev,
+ struct ethtool_ringparam *param,
+ struct kernel_ethtool_ringparam *kernel_param,
+ struct netlink_ext_ack *extack)
+{
+ struct qeth_card *card = dev->ml_priv;
+
+ param->rx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
+ param->rx_mini_max_pending = 0;
+ param->rx_jumbo_max_pending = 0;
+ param->tx_max_pending = QDIO_MAX_BUFFERS_PER_Q;
+
+ param->rx_pending = card->qdio.in_buf_pool.buf_count;
+ param->rx_mini_pending = 0;
+ param->rx_jumbo_pending = 0;
+ param->tx_pending = QDIO_MAX_BUFFERS_PER_Q;
+}
+
+static void qeth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+ struct qeth_card *card = dev->ml_priv;
+ char prefix[ETH_GSTRING_LEN] = "";
+ unsigned int i;
+
+ switch (stringset) {
+ case ETH_SS_STATS:
+ qeth_add_stat_strings(&data, prefix, card_stats,
+ CARD_STATS_LEN);
+ for (i = 0; i < card->qdio.no_out_queues; i++) {
+ snprintf(prefix, ETH_GSTRING_LEN, "tx%u ", i);
+ qeth_add_stat_strings(&data, prefix, txq_stats,
+ TXQ_STATS_LEN);
+ }
+ 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;
+
+ strscpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
+ sizeof(info->driver));
+ strscpy(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));
+}
+
+static void qeth_get_channels(struct net_device *dev,
+ struct ethtool_channels *channels)
+{
+ struct qeth_card *card = dev->ml_priv;
+
+ channels->max_rx = dev->num_rx_queues;
+ channels->max_tx = card->qdio.no_out_queues;
+ channels->max_other = 0;
+ channels->max_combined = 0;
+ channels->rx_count = dev->real_num_rx_queues;
+ channels->tx_count = dev->real_num_tx_queues;
+ channels->other_count = 0;
+ channels->combined_count = 0;
+}
+
+static int qeth_set_channels(struct net_device *dev,
+ struct ethtool_channels *channels)
+{
+ struct qeth_priv *priv = netdev_priv(dev);
+ struct qeth_card *card = dev->ml_priv;
+ int rc;
+
+ if (channels->rx_count == 0 || channels->tx_count == 0)
+ return -EINVAL;
+ if (channels->tx_count > card->qdio.no_out_queues)
+ return -EINVAL;
+
+ /* Prio-queueing needs all TX queues: */
+ if (qeth_uses_tx_prio_queueing(card))
+ return -EPERM;
+
+ if (IS_IQD(card)) {
+ if (channels->tx_count < QETH_IQD_MIN_TXQ)
+ return -EINVAL;
+
+ /* Reject downgrade while running. It could push displaced
+ * ucast flows onto txq0, which is reserved for mcast.
+ */
+ if (netif_running(dev) &&
+ channels->tx_count < dev->real_num_tx_queues)
+ return -EPERM;
+ }
+
+ rc = qeth_set_real_num_tx_queues(card, channels->tx_count);
+ if (!rc)
+ priv->tx_wanted_queues = channels->tx_count;
+
+ return rc;
+}
+
+static int qeth_get_ts_info(struct net_device *dev,
+ struct ethtool_ts_info *info)
+{
+ struct qeth_card *card = dev->ml_priv;
+
+ if (!IS_IQD(card))
+ return -EOPNOTSUPP;
+
+ return ethtool_op_get_ts_info(dev, info);
+}
+
+static int qeth_get_tunable(struct net_device *dev,
+ const struct ethtool_tunable *tuna, void *data)
+{
+ struct qeth_priv *priv = netdev_priv(dev);
+
+ switch (tuna->id) {
+ case ETHTOOL_RX_COPYBREAK:
+ *(u32 *)data = priv->rx_copybreak;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int qeth_set_tunable(struct net_device *dev,
+ const struct ethtool_tunable *tuna,
+ const void *data)
+{
+ struct qeth_priv *priv = netdev_priv(dev);
+
+ switch (tuna->id) {
+ case ETHTOOL_RX_COPYBREAK:
+ WRITE_ONCE(priv->rx_copybreak, *(u32 *)data);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue,
+ struct ethtool_coalesce *coal)
+{
+ struct qeth_card *card = dev->ml_priv;
+ struct qeth_qdio_out_q *queue;
+
+ if (!IS_IQD(card))
+ return -EOPNOTSUPP;
+
+ if (__queue >= card->qdio.no_out_queues)
+ return -EINVAL;
+
+ queue = card->qdio.out_qs[__queue];
+
+ coal->tx_coalesce_usecs = queue->coalesce_usecs;
+ coal->tx_max_coalesced_frames = queue->max_coalesced_frames;
+ return 0;
+}
+
+static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue,
+ struct ethtool_coalesce *coal)
+{
+ struct qeth_card *card = dev->ml_priv;
+
+ if (!IS_IQD(card))
+ return -EOPNOTSUPP;
+
+ if (queue >= card->qdio.no_out_queues)
+ return -EINVAL;
+
+ if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
+ return -EINVAL;
+
+ __qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal);
+ return 0;
+}
+
+/* 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_ethtool_link_modes(struct ethtool_link_ksettings *cmd,
+ enum qeth_link_mode link_mode)
+{
+ 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 (cmd->base.port) {
+ case PORT_TP:
+ ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
+ ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
+
+ switch (cmd->base.speed) {
+ case SPEED_10000:
+ ethtool_link_ksettings_add_link_mode(cmd, supported,
+ 10000baseT_Full);
+ ethtool_link_ksettings_add_link_mode(cmd, advertising,
+ 10000baseT_Full);
+ fallthrough;
+ 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);
+ fallthrough;
+ 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);
+ fallthrough;
+ 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:
+ break;
+ }
+
+ break;
+ case PORT_FIBRE:
+ ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
+ ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
+
+ switch (cmd->base.speed) {
+ 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:
+ if (link_mode == QETH_LINK_MODE_FIBRE_LONG) {
+ ethtool_link_ksettings_add_link_mode(cmd, supported,
+ 10000baseLR_Full);
+ ethtool_link_ksettings_add_link_mode(cmd, advertising,
+ 10000baseLR_Full);
+ } else if (link_mode == QETH_LINK_MODE_FIBRE_SHORT) {
+ ethtool_link_ksettings_add_link_mode(cmd, supported,
+ 10000baseSR_Full);
+ ethtool_link_ksettings_add_link_mode(cmd, advertising,
+ 10000baseSR_Full);
+ }
+ break;
+ case SPEED_1000:
+ ethtool_link_ksettings_add_link_mode(cmd, supported,
+ 1000baseX_Full);
+ ethtool_link_ksettings_add_link_mode(cmd, advertising,
+ 1000baseX_Full);
+ break;
+ default:
+ break;
+ }
+
+ break;
+ default:
+ break;
+ }
+}
+
+static int qeth_get_link_ksettings(struct net_device *netdev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct qeth_card *card = netdev->ml_priv;
+
+ QETH_CARD_TEXT(card, 4, "ethtglks");
+ cmd->base.speed = card->info.link_info.speed;
+ cmd->base.duplex = card->info.link_info.duplex;
+ cmd->base.port = card->info.link_info.port;
+ 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;
+
+ qeth_set_ethtool_link_modes(cmd, card->info.link_info.link_mode);
+
+ return 0;
+}
+
+const struct ethtool_ops qeth_ethtool_ops = {
+ .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
+ ETHTOOL_COALESCE_TX_MAX_FRAMES,
+ .get_link = ethtool_op_get_link,
+ .set_coalesce = qeth_set_coalesce,
+ .get_ringparam = qeth_get_ringparam,
+ .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_channels = qeth_get_channels,
+ .set_channels = qeth_set_channels,
+ .get_ts_info = qeth_get_ts_info,
+ .get_tunable = qeth_get_tunable,
+ .set_tunable = qeth_set_tunable,
+ .get_per_queue_coalesce = qeth_get_per_queue_coalesce,
+ .set_per_queue_coalesce = qeth_set_per_queue_coalesce,
+ .get_link_ksettings = qeth_get_link_ksettings,
+};