--- /dev/null
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Google virtual Ethernet (gve) driver
+ *
+ * Copyright (C) 2015-2019 Google, Inc.
+ */
+
+#include <linux/rtnetlink.h>
+#include "gve.h"
+
+static void gve_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *info)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+
+ strlcpy(info->driver, "gve", sizeof(info->driver));
+ strlcpy(info->version, gve_version_str, sizeof(info->version));
+ strlcpy(info->bus_info, pci_name(priv->pdev), sizeof(info->bus_info));
+}
+
+static void gve_set_msglevel(struct net_device *netdev, u32 value)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+
+ priv->msg_enable = value;
+}
+
+static u32 gve_get_msglevel(struct net_device *netdev)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+
+ return priv->msg_enable;
+}
+
+static const char gve_gstrings_main_stats[][ETH_GSTRING_LEN] = {
+ "rx_packets", "tx_packets", "rx_bytes", "tx_bytes",
+ "rx_dropped", "tx_dropped", "tx_timeouts",
+};
+
+#define GVE_MAIN_STATS_LEN ARRAY_SIZE(gve_gstrings_main_stats)
+#define NUM_GVE_TX_CNTS 5
+#define NUM_GVE_RX_CNTS 2
+
+static void gve_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+ char *s = (char *)data;
+ int i;
+
+ if (stringset != ETH_SS_STATS)
+ return;
+
+ memcpy(s, *gve_gstrings_main_stats,
+ sizeof(gve_gstrings_main_stats));
+ s += sizeof(gve_gstrings_main_stats);
+ for (i = 0; i < priv->rx_cfg.num_queues; i++) {
+ snprintf(s, ETH_GSTRING_LEN, "rx_desc_cnt[%u]", i);
+ s += ETH_GSTRING_LEN;
+ snprintf(s, ETH_GSTRING_LEN, "rx_desc_fill_cnt[%u]", i);
+ s += ETH_GSTRING_LEN;
+ }
+ for (i = 0; i < priv->tx_cfg.num_queues; i++) {
+ snprintf(s, ETH_GSTRING_LEN, "tx_req[%u]", i);
+ s += ETH_GSTRING_LEN;
+ snprintf(s, ETH_GSTRING_LEN, "tx_done[%u]", i);
+ s += ETH_GSTRING_LEN;
+ snprintf(s, ETH_GSTRING_LEN, "tx_wake[%u]", i);
+ s += ETH_GSTRING_LEN;
+ snprintf(s, ETH_GSTRING_LEN, "tx_stop[%u]", i);
+ s += ETH_GSTRING_LEN;
+ snprintf(s, ETH_GSTRING_LEN, "tx_event_counter[%u]", i);
+ s += ETH_GSTRING_LEN;
+ }
+}
+
+static int gve_get_sset_count(struct net_device *netdev, int sset)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+
+ switch (sset) {
+ case ETH_SS_STATS:
+ return GVE_MAIN_STATS_LEN +
+ (priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS) +
+ (priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static void
+gve_get_ethtool_stats(struct net_device *netdev,
+ struct ethtool_stats *stats, u64 *data)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+ u64 rx_pkts, rx_bytes, tx_pkts, tx_bytes;
+ unsigned int start;
+ int ring;
+ int i;
+
+ ASSERT_RTNL();
+
+ for (rx_pkts = 0, rx_bytes = 0, ring = 0;
+ ring < priv->rx_cfg.num_queues; ring++) {
+ if (priv->rx) {
+ do {
+ u64_stats_fetch_begin(&priv->rx[ring].statss);
+ rx_pkts += priv->rx[ring].rpackets;
+ rx_bytes += priv->rx[ring].rbytes;
+ } while (u64_stats_fetch_retry(&priv->rx[ring].statss,
+ start));
+ }
+ }
+ for (tx_pkts = 0, tx_bytes = 0, ring = 0;
+ ring < priv->tx_cfg.num_queues; ring++) {
+ if (priv->tx) {
+ do {
+ u64_stats_fetch_begin(&priv->tx[ring].statss);
+ tx_pkts += priv->tx[ring].pkt_done;
+ tx_bytes += priv->tx[ring].bytes_done;
+ } while (u64_stats_fetch_retry(&priv->tx[ring].statss,
+ start));
+ }
+ }
+
+ i = 0;
+ data[i++] = rx_pkts;
+ data[i++] = tx_pkts;
+ data[i++] = rx_bytes;
+ data[i++] = tx_bytes;
+ /* Skip rx_dropped and tx_dropped */
+ i += 2;
+ data[i++] = priv->tx_timeo_cnt;
+ i = GVE_MAIN_STATS_LEN;
+
+ /* walk RX rings */
+ if (priv->rx) {
+ for (ring = 0; ring < priv->rx_cfg.num_queues; ring++) {
+ struct gve_rx_ring *rx = &priv->rx[ring];
+
+ data[i++] = rx->desc.cnt;
+ data[i++] = rx->desc.fill_cnt;
+ }
+ } else {
+ i += priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS;
+ }
+ /* walk TX rings */
+ if (priv->tx) {
+ for (ring = 0; ring < priv->tx_cfg.num_queues; ring++) {
+ struct gve_tx_ring *tx = &priv->tx[ring];
+
+ data[i++] = tx->req;
+ data[i++] = tx->done;
+ data[i++] = tx->wake_queue;
+ data[i++] = tx->stop_queue;
+ data[i++] = be32_to_cpu(gve_tx_load_event_counter(priv,
+ tx));
+ }
+ } else {
+ i += priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS;
+ }
+}
+
+static void gve_get_channels(struct net_device *netdev,
+ struct ethtool_channels *cmd)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+
+ cmd->max_rx = priv->rx_cfg.max_queues;
+ cmd->max_tx = priv->tx_cfg.max_queues;
+ cmd->max_other = 0;
+ cmd->max_combined = 0;
+ cmd->rx_count = priv->rx_cfg.num_queues;
+ cmd->tx_count = priv->tx_cfg.num_queues;
+ cmd->other_count = 0;
+ cmd->combined_count = 0;
+}
+
+static int gve_set_channels(struct net_device *netdev,
+ struct ethtool_channels *cmd)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+ struct gve_queue_config new_tx_cfg = priv->tx_cfg;
+ struct gve_queue_config new_rx_cfg = priv->rx_cfg;
+ struct ethtool_channels old_settings;
+ int new_tx = cmd->tx_count;
+ int new_rx = cmd->rx_count;
+
+ gve_get_channels(netdev, &old_settings);
+
+ /* Changing combined is not allowed allowed */
+ if (cmd->combined_count != old_settings.combined_count)
+ return -EINVAL;
+
+ if (!new_rx || !new_tx)
+ return -EINVAL;
+
+ if (!netif_carrier_ok(netdev)) {
+ priv->tx_cfg.num_queues = new_tx;
+ priv->rx_cfg.num_queues = new_rx;
+ return 0;
+ }
+
+ new_tx_cfg.num_queues = new_tx;
+ new_rx_cfg.num_queues = new_rx;
+
+ return gve_adjust_queues(priv, new_rx_cfg, new_tx_cfg);
+}
+
+static void gve_get_ringparam(struct net_device *netdev,
+ struct ethtool_ringparam *cmd)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+
+ cmd->rx_max_pending = priv->rx_desc_cnt;
+ cmd->tx_max_pending = priv->tx_desc_cnt;
+ cmd->rx_pending = priv->rx_desc_cnt;
+ cmd->tx_pending = priv->tx_desc_cnt;
+}
+
+static int gve_user_reset(struct net_device *netdev, u32 *flags)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+
+ if (*flags == ETH_RESET_ALL) {
+ *flags = 0;
+ return gve_reset(priv, true);
+ }
+
+ return -EOPNOTSUPP;
+}
+
+const struct ethtool_ops gve_ethtool_ops = {
+ .get_drvinfo = gve_get_drvinfo,
+ .get_strings = gve_get_strings,
+ .get_sset_count = gve_get_sset_count,
+ .get_ethtool_stats = gve_get_ethtool_stats,
+ .set_msglevel = gve_set_msglevel,
+ .get_msglevel = gve_get_msglevel,
+ .set_channels = gve_set_channels,
+ .get_channels = gve_get_channels,
+ .get_link = ethtool_op_get_link,
+ .get_ringparam = gve_get_ringparam,
+ .reset = gve_user_reset,
+};
#define GVE_VERSION "1.0.0"
#define GVE_VERSION_PREFIX "GVE-"
-static const char gve_version_str[] = GVE_VERSION;
+const char gve_version_str[] = GVE_VERSION;
static const char gve_version_prefix[] = GVE_VERSION_PREFIX;
static void gve_get_stats(struct net_device *dev, struct rtnl_link_stats64 *s)
return gve_reset_recovery(priv, false);
}
+int gve_adjust_queues(struct gve_priv *priv,
+ struct gve_queue_config new_rx_config,
+ struct gve_queue_config new_tx_config)
+{
+ int err;
+
+ if (netif_carrier_ok(priv->dev)) {
+ /* To make this process as simple as possible we teardown the
+ * device, set the new configuration, and then bring the device
+ * up again.
+ */
+ err = gve_close(priv->dev);
+ /* we have already tried to reset in close,
+ * just fail at this point
+ */
+ if (err)
+ return err;
+ priv->tx_cfg = new_tx_config;
+ priv->rx_cfg = new_rx_config;
+
+ err = gve_open(priv->dev);
+ if (err)
+ goto err;
+
+ return 0;
+ }
+ /* Set the config for the next up. */
+ priv->tx_cfg = new_tx_config;
+ priv->rx_cfg = new_rx_config;
+
+ return 0;
+err:
+ netif_err(priv, drv, priv->dev,
+ "Adjust queues failed! !!! DISABLING ALL QUEUES !!!\n");
+ gve_turndown(priv);
+ return err;
+}
+
static void gve_turndown(struct gve_priv *priv)
{
int idx;
}
SET_NETDEV_DEV(dev, &pdev->dev);
pci_set_drvdata(pdev, dev);
+ dev->ethtool_ops = &gve_ethtool_ops;
dev->netdev_ops = &gve_netdev_ops;
/* advertise features */
dev->hw_features = NETIF_F_HIGHDMA;
projects / platform / kernel / linux-rpi.git / commitdiff