blob: c8df47a97fa4f9bf2646b182406fe9602cc9fbef [file] [log] [blame]
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/* Google virtual Ethernet (gve) driver
*
* Copyright (C) 2015-2021 Google, Inc.
*/
#include <linux/ethtool.h>
#include <linux/rtnetlink.h>
#include "gve.h"
#include "gve_adminq.h"
static void gve_get_drvinfo(struct net_device *netdev,
struct ethtool_drvinfo *info)
{
struct gve_priv *priv = netdev_priv(netdev);
strscpy(info->driver, "gve", sizeof(info->driver));
strscpy(info->version, gve_version_str, sizeof(info->version));
strscpy(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",
"rx_skb_alloc_fail", "rx_buf_alloc_fail", "rx_desc_err_dropped_pkt",
"interface_up_cnt", "interface_down_cnt", "reset_cnt",
"page_alloc_fail", "dma_mapping_error", "stats_report_trigger_cnt",
};
static const char gve_gstrings_rx_stats[][ETH_GSTRING_LEN] = {
"rx_posted_desc[%u]", "rx_completed_desc[%u]", "rx_bytes[%u]",
"rx_cont_packet_cnt[%u]", "rx_frag_flip_cnt[%u]", "rx_frag_copy_cnt[%u]",
"rx_dropped_pkt[%u]", "rx_copybreak_pkt[%u]", "rx_copied_pkt[%u]",
"rx_queue_drop_cnt[%u]", "rx_no_buffers_posted[%u]",
"rx_drops_packet_over_mru[%u]", "rx_drops_invalid_checksum[%u]",
};
static const char gve_gstrings_tx_stats[][ETH_GSTRING_LEN] = {
"tx_posted_desc[%u]", "tx_completed_desc[%u]", "tx_bytes[%u]",
"tx_wake[%u]", "tx_stop[%u]", "tx_event_counter[%u]",
"tx_dma_mapping_error[%u]",
};
static const char gve_gstrings_adminq_stats[][ETH_GSTRING_LEN] = {
"adminq_prod_cnt", "adminq_cmd_fail", "adminq_timeouts",
"adminq_describe_device_cnt", "adminq_cfg_device_resources_cnt",
"adminq_register_page_list_cnt", "adminq_unregister_page_list_cnt",
"adminq_create_tx_queue_cnt", "adminq_create_rx_queue_cnt",
"adminq_destroy_tx_queue_cnt", "adminq_destroy_rx_queue_cnt",
"adminq_dcfg_device_resources_cnt", "adminq_set_driver_parameter_cnt",
"adminq_report_stats_cnt", "adminq_report_link_speed_cnt"
};
static const char gve_gstrings_priv_flags[][ETH_GSTRING_LEN] = {
"report-stats",
};
#define GVE_MAIN_STATS_LEN ARRAY_SIZE(gve_gstrings_main_stats)
#define GVE_ADMINQ_STATS_LEN ARRAY_SIZE(gve_gstrings_adminq_stats)
#define NUM_GVE_TX_CNTS ARRAY_SIZE(gve_gstrings_tx_stats)
#define NUM_GVE_RX_CNTS ARRAY_SIZE(gve_gstrings_rx_stats)
#define GVE_PRIV_FLAGS_STR_LEN ARRAY_SIZE(gve_gstrings_priv_flags)
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, j;
switch (stringset) {
case ETH_SS_STATS:
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++) {
for (j = 0; j < NUM_GVE_RX_CNTS; j++) {
snprintf(s, ETH_GSTRING_LEN,
gve_gstrings_rx_stats[j], i);
s += ETH_GSTRING_LEN;
}
}
for (i = 0; i < priv->tx_cfg.num_queues; i++) {
for (j = 0; j < NUM_GVE_TX_CNTS; j++) {
snprintf(s, ETH_GSTRING_LEN,
gve_gstrings_tx_stats[j], i);
s += ETH_GSTRING_LEN;
}
}
memcpy(s, *gve_gstrings_adminq_stats,
sizeof(gve_gstrings_adminq_stats));
s += sizeof(gve_gstrings_adminq_stats);
break;
case ETH_SS_PRIV_FLAGS:
memcpy(s, *gve_gstrings_priv_flags,
sizeof(gve_gstrings_priv_flags));
s += sizeof(gve_gstrings_priv_flags);
break;
default:
break;
}
}
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 + GVE_ADMINQ_STATS_LEN +
(priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS) +
(priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS);
case ETH_SS_PRIV_FLAGS:
return GVE_PRIV_FLAGS_STR_LEN;
default:
return -EOPNOTSUPP;
}
}
static void
gve_get_ethtool_stats(struct net_device *netdev,
struct ethtool_stats *stats, u64 *data)
{
u64 tmp_rx_pkts, tmp_rx_bytes, tmp_rx_skb_alloc_fail, tmp_rx_buf_alloc_fail,
tmp_rx_desc_err_dropped_pkt, tmp_tx_pkts, tmp_tx_bytes;
u64 rx_buf_alloc_fail, rx_desc_err_dropped_pkt, rx_pkts,
rx_skb_alloc_fail, rx_bytes, tx_pkts, tx_bytes;
int stats_idx, base_stats_idx, max_stats_idx;
struct stats *report_stats;
int *rx_qid_to_stats_idx;
int *tx_qid_to_stats_idx;
struct gve_priv *priv;
bool skip_nic_stats;
unsigned int start;
int ring;
int i, j;
ASSERT_RTNL();
priv = netdev_priv(netdev);
report_stats = priv->stats_report->stats;
rx_qid_to_stats_idx = kmalloc_array(priv->rx_cfg.num_queues,
sizeof(int), GFP_KERNEL);
if (!rx_qid_to_stats_idx)
return;
tx_qid_to_stats_idx = kmalloc_array(priv->tx_cfg.num_queues,
sizeof(int), GFP_KERNEL);
if (!tx_qid_to_stats_idx) {
kfree(rx_qid_to_stats_idx);
return;
}
for (rx_pkts = 0, rx_bytes = 0, rx_skb_alloc_fail = 0,
rx_buf_alloc_fail = 0, rx_desc_err_dropped_pkt = 0, ring = 0;
ring < priv->rx_cfg.num_queues; ring++) {
if (priv->rx) {
do {
struct gve_rx_ring *rx = &priv->rx[ring];
start =
u64_stats_fetch_begin(&priv->rx[ring].statss);
tmp_rx_pkts = rx->rpackets;
tmp_rx_bytes = rx->rbytes;
tmp_rx_skb_alloc_fail = rx->rx_skb_alloc_fail;
tmp_rx_buf_alloc_fail = rx->rx_buf_alloc_fail;
tmp_rx_desc_err_dropped_pkt =
rx->rx_desc_err_dropped_pkt;
} while (u64_stats_fetch_retry(&priv->rx[ring].statss,
start));
rx_pkts += tmp_rx_pkts;
rx_bytes += tmp_rx_bytes;
rx_skb_alloc_fail += tmp_rx_skb_alloc_fail;
rx_buf_alloc_fail += tmp_rx_buf_alloc_fail;
rx_desc_err_dropped_pkt += tmp_rx_desc_err_dropped_pkt;
}
}
for (tx_pkts = 0, tx_bytes = 0, ring = 0;
ring < priv->tx_cfg.num_queues; ring++) {
if (priv->tx) {
do {
start =
u64_stats_fetch_begin(&priv->tx[ring].statss);
tmp_tx_pkts = priv->tx[ring].pkt_done;
tmp_tx_bytes = priv->tx[ring].bytes_done;
} while (u64_stats_fetch_retry(&priv->tx[ring].statss,
start));
tx_pkts += tmp_tx_pkts;
tx_bytes += tmp_tx_bytes;
}
}
i = 0;
data[i++] = rx_pkts;
data[i++] = tx_pkts;
data[i++] = rx_bytes;
data[i++] = tx_bytes;
/* total rx dropped packets */
data[i++] = rx_skb_alloc_fail + rx_buf_alloc_fail +
rx_desc_err_dropped_pkt;
/* Skip tx_dropped */
i++;
data[i++] = priv->tx_timeo_cnt;
data[i++] = rx_skb_alloc_fail;
data[i++] = rx_buf_alloc_fail;
data[i++] = rx_desc_err_dropped_pkt;
data[i++] = priv->interface_up_cnt;
data[i++] = priv->interface_down_cnt;
data[i++] = priv->reset_cnt;
data[i++] = priv->page_alloc_fail;
data[i++] = priv->dma_mapping_error;
data[i++] = priv->stats_report_trigger_cnt;
i = GVE_MAIN_STATS_LEN;
/* For rx cross-reporting stats, start from nic rx stats in report */
base_stats_idx = GVE_TX_STATS_REPORT_NUM * priv->tx_cfg.num_queues +
GVE_RX_STATS_REPORT_NUM * priv->rx_cfg.num_queues;
max_stats_idx = NIC_RX_STATS_REPORT_NUM * priv->rx_cfg.num_queues +
base_stats_idx;
/* Preprocess the stats report for rx, map queue id to start index */
skip_nic_stats = false;
for (stats_idx = base_stats_idx; stats_idx < max_stats_idx;
stats_idx += NIC_RX_STATS_REPORT_NUM) {
u32 stat_name = be32_to_cpu(report_stats[stats_idx].stat_name);
u32 queue_id = be32_to_cpu(report_stats[stats_idx].queue_id);
if (stat_name == 0) {
/* no stats written by NIC yet */
skip_nic_stats = true;
break;
}
rx_qid_to_stats_idx[queue_id] = stats_idx;
}
/* 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->fill_cnt;
data[i++] = rx->cnt;
do {
start =
u64_stats_fetch_begin(&priv->rx[ring].statss);
tmp_rx_bytes = rx->rbytes;
tmp_rx_skb_alloc_fail = rx->rx_skb_alloc_fail;
tmp_rx_buf_alloc_fail = rx->rx_buf_alloc_fail;
tmp_rx_desc_err_dropped_pkt =
rx->rx_desc_err_dropped_pkt;
} while (u64_stats_fetch_retry(&priv->rx[ring].statss,
start));
data[i++] = tmp_rx_bytes;
data[i++] = rx->rx_cont_packet_cnt;
data[i++] = rx->rx_frag_flip_cnt;
data[i++] = rx->rx_frag_copy_cnt;
/* rx dropped packets */
data[i++] = tmp_rx_skb_alloc_fail +
tmp_rx_buf_alloc_fail +
tmp_rx_desc_err_dropped_pkt;
data[i++] = rx->rx_copybreak_pkt;
data[i++] = rx->rx_copied_pkt;
/* stats from NIC */
if (skip_nic_stats) {
/* skip NIC rx stats */
i += NIC_RX_STATS_REPORT_NUM;
continue;
}
for (j = 0; j < NIC_RX_STATS_REPORT_NUM; j++) {
u64 value =
be64_to_cpu(report_stats[rx_qid_to_stats_idx[ring] + j].value);
data[i++] = value;
}
}
} else {
i += priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS;
}
/* For tx cross-reporting stats, start from nic tx stats in report */
base_stats_idx = max_stats_idx;
max_stats_idx = NIC_TX_STATS_REPORT_NUM * priv->tx_cfg.num_queues +
max_stats_idx;
/* Preprocess the stats report for tx, map queue id to start index */
skip_nic_stats = false;
for (stats_idx = base_stats_idx; stats_idx < max_stats_idx;
stats_idx += NIC_TX_STATS_REPORT_NUM) {
u32 stat_name = be32_to_cpu(report_stats[stats_idx].stat_name);
u32 queue_id = be32_to_cpu(report_stats[stats_idx].queue_id);
if (stat_name == 0) {
/* no stats written by NIC yet */
skip_nic_stats = true;
break;
}
tx_qid_to_stats_idx[queue_id] = stats_idx;
}
/* walk TX rings */
if (priv->tx) {
for (ring = 0; ring < priv->tx_cfg.num_queues; ring++) {
struct gve_tx_ring *tx = &priv->tx[ring];
if (gve_is_gqi(priv)) {
data[i++] = tx->req;
data[i++] = tx->done;
} else {
/* DQO doesn't currently support
* posted/completed descriptor counts;
*/
data[i++] = 0;
data[i++] = 0;
}
do {
start =
u64_stats_fetch_begin(&priv->tx[ring].statss);
tmp_tx_bytes = tx->bytes_done;
} while (u64_stats_fetch_retry(&priv->tx[ring].statss,
start));
data[i++] = tmp_tx_bytes;
data[i++] = tx->wake_queue;
data[i++] = tx->stop_queue;
data[i++] = gve_tx_load_event_counter(priv, tx);
data[i++] = tx->dma_mapping_error;
/* stats from NIC */
if (skip_nic_stats) {
/* skip NIC tx stats */
i += NIC_TX_STATS_REPORT_NUM;
continue;
}
for (j = 0; j < NIC_TX_STATS_REPORT_NUM; j++) {
u64 value =
be64_to_cpu(report_stats[tx_qid_to_stats_idx[ring] + j].value);
data[i++] = value;
}
}
} else {
i += priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS;
}
kfree(rx_qid_to_stats_idx);
kfree(tx_qid_to_stats_idx);
/* AQ Stats */
data[i++] = priv->adminq_prod_cnt;
data[i++] = priv->adminq_cmd_fail;
data[i++] = priv->adminq_timeouts;
data[i++] = priv->adminq_describe_device_cnt;
data[i++] = priv->adminq_cfg_device_resources_cnt;
data[i++] = priv->adminq_register_page_list_cnt;
data[i++] = priv->adminq_unregister_page_list_cnt;
data[i++] = priv->adminq_create_tx_queue_cnt;
data[i++] = priv->adminq_create_rx_queue_cnt;
data[i++] = priv->adminq_destroy_tx_queue_cnt;
data[i++] = priv->adminq_destroy_rx_queue_cnt;
data[i++] = priv->adminq_dcfg_device_resources_cnt;
data[i++] = priv->adminq_set_driver_parameter_cnt;
data[i++] = priv->adminq_report_stats_cnt;
data[i++] = priv->adminq_report_link_speed_cnt;
}
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 */
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;
}
static int gve_get_tunable(struct net_device *netdev,
const struct ethtool_tunable *etuna, void *value)
{
struct gve_priv *priv = netdev_priv(netdev);
switch (etuna->id) {
case ETHTOOL_RX_COPYBREAK:
*(u32 *)value = priv->rx_copybreak;
return 0;
default:
return -EOPNOTSUPP;
}
}
static int gve_set_tunable(struct net_device *netdev,
const struct ethtool_tunable *etuna,
const void *value)
{
struct gve_priv *priv = netdev_priv(netdev);
u32 len;
switch (etuna->id) {
case ETHTOOL_RX_COPYBREAK:
{
u32 max_copybreak = gve_is_gqi(priv) ?
(PAGE_SIZE / 2) : priv->data_buffer_size_dqo;
len = *(u32 *)value;
if (len > max_copybreak)
return -EINVAL;
priv->rx_copybreak = len;
return 0;
}
default:
return -EOPNOTSUPP;
}
}
static u32 gve_get_priv_flags(struct net_device *netdev)
{
struct gve_priv *priv = netdev_priv(netdev);
u32 ret_flags = 0;
/* Only 1 flag exists currently: report-stats (BIT(O)), so set that flag. */
if (priv->ethtool_flags & BIT(0))
ret_flags |= BIT(0);
return ret_flags;
}
static int gve_set_priv_flags(struct net_device *netdev, u32 flags)
{
struct gve_priv *priv = netdev_priv(netdev);
u64 ori_flags, new_flags;
ori_flags = READ_ONCE(priv->ethtool_flags);
new_flags = ori_flags;
/* Only one priv flag exists: report-stats (BIT(0))*/
if (flags & BIT(0))
new_flags |= BIT(0);
else
new_flags &= ~(BIT(0));
priv->ethtool_flags = new_flags;
/* start report-stats timer when user turns report stats on. */
if (flags & BIT(0)) {
mod_timer(&priv->stats_report_timer,
round_jiffies(jiffies +
msecs_to_jiffies(priv->stats_report_timer_period)));
}
/* Zero off gve stats when report-stats turned off and */
/* delete report stats timer. */
if (!(flags & BIT(0)) && (ori_flags & BIT(0))) {
int tx_stats_num = GVE_TX_STATS_REPORT_NUM *
priv->tx_cfg.num_queues;
int rx_stats_num = GVE_RX_STATS_REPORT_NUM *
priv->rx_cfg.num_queues;
memset(priv->stats_report->stats, 0, (tx_stats_num + rx_stats_num) *
sizeof(struct stats));
del_timer_sync(&priv->stats_report_timer);
}
return 0;
}
static int gve_get_link_ksettings(struct net_device *netdev,
struct ethtool_link_ksettings *cmd)
{
struct gve_priv *priv = netdev_priv(netdev);
int err = gve_adminq_report_link_speed(priv);
cmd->base.speed = priv->link_speed;
return err;
}
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,
.get_tunable = gve_get_tunable,
.set_tunable = gve_set_tunable,
.get_priv_flags = gve_get_priv_flags,
.set_priv_flags = gve_set_priv_flags,
.get_link_ksettings = gve_get_link_ksettings
};