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linux/drivers/s390/net/qeth_ethtool.c
Kory Maincent 2111375b85 net: Add struct kernel_ethtool_ts_info 
In prevision to add new UAPI for hwtstamp we will be limited to the struct
ethtool_ts_info that is currently passed in fixed binary format through the
ETHTOOL_GET_TS_INFO ethtool ioctl. It would be good if new kernel code
already started operating on an extensible kernel variant of that
structure, similar in concept to struct kernel_hwtstamp_config vs struct
hwtstamp_config.

Since struct ethtool_ts_info is in include/uapi/linux/ethtool.h, here
we introduce the kernel-only structure in include/linux/ethtool.h.
The manual copy is then made in the function called by ETHTOOL_GET_TS_INFO.

Acked-by: Shannon Nelson <shannon.nelson@amd.com>
Acked-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20240709-feature_ptp_netnext-v17-6-b5317f50df2a@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-07-15 08:02:26 -07:00

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// 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++) {
scnprintf(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));
scnprintf(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 kernel_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,
};
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