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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright (c) 2021, Microsoft Corporation. */
#include <linux/inetdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <net/mana/mana.h>
static const struct {
char name[ETH_GSTRING_LEN];
u16 offset;
} mana_eth_stats[] = {
{"stop_queue", offsetof(struct mana_ethtool_stats, stop_queue)},
{"wake_queue", offsetof(struct mana_ethtool_stats, wake_queue)},
};
static int mana_get_sset_count(struct net_device *ndev, int stringset)
{
struct mana_port_context *apc = netdev_priv(ndev);
unsigned int num_queues = apc->num_queues;
if (stringset != ETH_SS_STATS)
return -EINVAL;
return ARRAY_SIZE(mana_eth_stats) + num_queues * 8;
}
static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
{
struct mana_port_context *apc = netdev_priv(ndev);
unsigned int num_queues = apc->num_queues;
u8 *p = data;
int i;
if (stringset != ETH_SS_STATS)
return;
for (i = 0; i < ARRAY_SIZE(mana_eth_stats); i++) {
memcpy(p, mana_eth_stats[i].name, ETH_GSTRING_LEN);
p += ETH_GSTRING_LEN;
}
for (i = 0; i < num_queues; i++) {
sprintf(p, "rx_%d_packets", i);
p += ETH_GSTRING_LEN;
sprintf(p, "rx_%d_bytes", i);
p += ETH_GSTRING_LEN;
sprintf(p, "rx_%d_xdp_drop", i);
p += ETH_GSTRING_LEN;
sprintf(p, "rx_%d_xdp_tx", i);
p += ETH_GSTRING_LEN;
sprintf(p, "rx_%d_xdp_redirect", i);
p += ETH_GSTRING_LEN;
}
for (i = 0; i < num_queues; i++) {
sprintf(p, "tx_%d_packets", i);
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_bytes", i);
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_xdp_xmit", i);
p += ETH_GSTRING_LEN;
}
}
static void mana_get_ethtool_stats(struct net_device *ndev,
struct ethtool_stats *e_stats, u64 *data)
{
struct mana_port_context *apc = netdev_priv(ndev);
unsigned int num_queues = apc->num_queues;
void *eth_stats = &apc->eth_stats;
struct mana_stats_rx *rx_stats;
struct mana_stats_tx *tx_stats;
unsigned int start;
u64 packets, bytes;
u64 xdp_redirect;
u64 xdp_xmit;
u64 xdp_drop;
u64 xdp_tx;
int q, i = 0;
if (!apc->port_is_up)
return;
for (q = 0; q < ARRAY_SIZE(mana_eth_stats); q++)
data[i++] = *(u64 *)(eth_stats + mana_eth_stats[q].offset);
for (q = 0; q < num_queues; q++) {
rx_stats = &apc->rxqs[q]->stats;
do {
start = u64_stats_fetch_begin(&rx_stats->syncp);
packets = rx_stats->packets;
bytes = rx_stats->bytes;
xdp_drop = rx_stats->xdp_drop;
xdp_tx = rx_stats->xdp_tx;
xdp_redirect = rx_stats->xdp_redirect;
} while (u64_stats_fetch_retry(&rx_stats->syncp, start));
data[i++] = packets;
data[i++] = bytes;
data[i++] = xdp_drop;
data[i++] = xdp_tx;
data[i++] = xdp_redirect;
}
for (q = 0; q < num_queues; q++) {
tx_stats = &apc->tx_qp[q].txq.stats;
do {
start = u64_stats_fetch_begin(&tx_stats->syncp);
packets = tx_stats->packets;
bytes = tx_stats->bytes;
xdp_xmit = tx_stats->xdp_xmit;
} while (u64_stats_fetch_retry(&tx_stats->syncp, start));
data[i++] = packets;
data[i++] = bytes;
data[i++] = xdp_xmit;
}
}
static int mana_get_rxnfc(struct net_device *ndev, struct ethtool_rxnfc *cmd,
u32 *rules)
{
struct mana_port_context *apc = netdev_priv(ndev);
switch (cmd->cmd) {
case ETHTOOL_GRXRINGS:
cmd->data = apc->num_queues;
return 0;
}
return -EOPNOTSUPP;
}
static u32 mana_get_rxfh_key_size(struct net_device *ndev)
{
return MANA_HASH_KEY_SIZE;
}
static u32 mana_rss_indir_size(struct net_device *ndev)
{
return MANA_INDIRECT_TABLE_SIZE;
}
static int mana_get_rxfh(struct net_device *ndev, u32 *indir, u8 *key,
u8 *hfunc)
{
struct mana_port_context *apc = netdev_priv(ndev);
int i;
if (hfunc)
*hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */
if (indir) {
for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++)
indir[i] = apc->indir_table[i];
}
if (key)
memcpy(key, apc->hashkey, MANA_HASH_KEY_SIZE);
return 0;
}
static int mana_set_rxfh(struct net_device *ndev, const u32 *indir,
const u8 *key, const u8 hfunc)
{
struct mana_port_context *apc = netdev_priv(ndev);
bool update_hash = false, update_table = false;
u32 save_table[MANA_INDIRECT_TABLE_SIZE];
u8 save_key[MANA_HASH_KEY_SIZE];
int i, err;
if (!apc->port_is_up)
return -EOPNOTSUPP;
if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
if (indir) {
for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++)
if (indir[i] >= apc->num_queues)
return -EINVAL;
update_table = true;
for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) {
save_table[i] = apc->indir_table[i];
apc->indir_table[i] = indir[i];
}
}
if (key) {
update_hash = true;
memcpy(save_key, apc->hashkey, MANA_HASH_KEY_SIZE);
memcpy(apc->hashkey, key, MANA_HASH_KEY_SIZE);
}
err = mana_config_rss(apc, TRI_STATE_TRUE, update_hash, update_table);
if (err) { /* recover to original values */
if (update_table) {
for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++)
apc->indir_table[i] = save_table[i];
}
if (update_hash)
memcpy(apc->hashkey, save_key, MANA_HASH_KEY_SIZE);
mana_config_rss(apc, TRI_STATE_TRUE, update_hash, update_table);
}
return err;
}
static void mana_get_channels(struct net_device *ndev,
struct ethtool_channels *channel)
{
struct mana_port_context *apc = netdev_priv(ndev);
channel->max_combined = apc->max_queues;
channel->combined_count = apc->num_queues;
}
static int mana_set_channels(struct net_device *ndev,
struct ethtool_channels *channels)
{
struct mana_port_context *apc = netdev_priv(ndev);
unsigned int new_count = channels->combined_count;
unsigned int old_count = apc->num_queues;
int err, err2;
err = mana_detach(ndev, false);
if (err) {
netdev_err(ndev, "mana_detach failed: %d\n", err);
return err;
}
apc->num_queues = new_count;
err = mana_attach(ndev);
if (!err)
return 0;
netdev_err(ndev, "mana_attach failed: %d\n", err);
/* Try to roll it back to the old configuration. */
apc->num_queues = old_count;
err2 = mana_attach(ndev);
if (err2)
netdev_err(ndev, "mana re-attach failed: %d\n", err2);
return err;
}
const struct ethtool_ops mana_ethtool_ops = {
.get_ethtool_stats = mana_get_ethtool_stats,
.get_sset_count = mana_get_sset_count,
.get_strings = mana_get_strings,
.get_rxnfc = mana_get_rxnfc,
.get_rxfh_key_size = mana_get_rxfh_key_size,
.get_rxfh_indir_size = mana_rss_indir_size,
.get_rxfh = mana_get_rxfh,
.set_rxfh = mana_set_rxfh,
.get_channels = mana_get_channels,
.set_channels = mana_set_channels,
};
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