// 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)},
{"hc_rx_discards_no_wqe", offsetof(struct mana_ethtool_stats,
hc_rx_discards_no_wqe)},
{"hc_rx_err_vport_disabled", offsetof(struct mana_ethtool_stats,
hc_rx_err_vport_disabled)},
{"hc_rx_bytes", offsetof(struct mana_ethtool_stats, hc_rx_bytes)},
{"hc_rx_ucast_pkts", offsetof(struct mana_ethtool_stats,
hc_rx_ucast_pkts)},
{"hc_rx_ucast_bytes", offsetof(struct mana_ethtool_stats,
hc_rx_ucast_bytes)},
{"hc_rx_bcast_pkts", offsetof(struct mana_ethtool_stats,
hc_rx_bcast_pkts)},
{"hc_rx_bcast_bytes", offsetof(struct mana_ethtool_stats,
hc_rx_bcast_bytes)},
{"hc_rx_mcast_pkts", offsetof(struct mana_ethtool_stats,
hc_rx_mcast_pkts)},
{"hc_rx_mcast_bytes", offsetof(struct mana_ethtool_stats,
hc_rx_mcast_bytes)},
{"hc_tx_err_gf_disabled", offsetof(struct mana_ethtool_stats,
hc_tx_err_gf_disabled)},
{"hc_tx_err_vport_disabled", offsetof(struct mana_ethtool_stats,
hc_tx_err_vport_disabled)},
{"hc_tx_err_inval_vportoffset_pkt",
offsetof(struct mana_ethtool_stats,
hc_tx_err_inval_vportoffset_pkt)},
{"hc_tx_err_vlan_enforcement", offsetof(struct mana_ethtool_stats,
hc_tx_err_vlan_enforcement)},
{"hc_tx_err_eth_type_enforcement",
offsetof(struct mana_ethtool_stats, hc_tx_err_eth_type_enforcement)},
{"hc_tx_err_sa_enforcement", offsetof(struct mana_ethtool_stats,
hc_tx_err_sa_enforcement)},
{"hc_tx_err_sqpdid_enforcement",
offsetof(struct mana_ethtool_stats, hc_tx_err_sqpdid_enforcement)},
{"hc_tx_err_cqpdid_enforcement",
offsetof(struct mana_ethtool_stats, hc_tx_err_cqpdid_enforcement)},
{"hc_tx_err_mtu_violation", offsetof(struct mana_ethtool_stats,
hc_tx_err_mtu_violation)},
{"hc_tx_err_inval_oob", offsetof(struct mana_ethtool_stats,
hc_tx_err_inval_oob)},
{"hc_tx_err_gdma", offsetof(struct mana_ethtool_stats,
hc_tx_err_gdma)},
{"hc_tx_bytes", offsetof(struct mana_ethtool_stats, hc_tx_bytes)},
{"hc_tx_ucast_pkts", offsetof(struct mana_ethtool_stats,
hc_tx_ucast_pkts)},
{"hc_tx_ucast_bytes", offsetof(struct mana_ethtool_stats,
hc_tx_ucast_bytes)},
{"hc_tx_bcast_pkts", offsetof(struct mana_ethtool_stats,
hc_tx_bcast_pkts)},
{"hc_tx_bcast_bytes", offsetof(struct mana_ethtool_stats,
hc_tx_bcast_bytes)},
{"hc_tx_mcast_pkts", offsetof(struct mana_ethtool_stats,
hc_tx_mcast_pkts)},
{"hc_tx_mcast_bytes", offsetof(struct mana_ethtool_stats,
hc_tx_mcast_bytes)},
{"tx_cq_err", offsetof(struct mana_ethtool_stats, tx_cqe_err)},
{"tx_cqe_unknown_type", offsetof(struct mana_ethtool_stats,
tx_cqe_unknown_type)},
{"rx_coalesced_err", offsetof(struct mana_ethtool_stats,
rx_coalesced_err)},
{"rx_cqe_unknown_type", offsetof(struct mana_ethtool_stats,
rx_cqe_unknown_type)},
};
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 *
(MANA_STATS_RX_COUNT + MANA_STATS_TX_COUNT);
}
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;
sprintf(p, "tx_%d_tso_packets", i);
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_tso_bytes", i);
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_tso_inner_packets", i);
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_tso_inner_bytes", i);
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_long_pkt_fmt", i);
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_short_pkt_fmt", i);
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_csum_partial", i);
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_mana_map_err", 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;
u64 tso_packets;
u64 tso_bytes;
u64 tso_inner_packets;
u64 tso_inner_bytes;
u64 long_pkt_fmt;
u64 short_pkt_fmt;
u64 csum_partial;
u64 mana_map_err;
int q, i = 0;
if (!apc->port_is_up)
return;
/* we call mana function to update stats from GDMA */
mana_query_gf_stats(apc);
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;
tso_packets = tx_stats->tso_packets;
tso_bytes = tx_stats->tso_bytes;
tso_inner_packets = tx_stats->tso_inner_packets;
tso_inner_bytes = tx_stats->tso_inner_bytes;
long_pkt_fmt = tx_stats->long_pkt_fmt;
short_pkt_fmt = tx_stats->short_pkt_fmt;
csum_partial = tx_stats->csum_partial;
mana_map_err = tx_stats->mana_map_err;
} while (u64_stats_fetch_retry(&tx_stats->syncp, start));
data[i++] = packets;
data[i++] = bytes;
data[i++] = xdp_xmit;
data[i++] = tso_packets;
data[i++] = tso_bytes;
data[i++] = tso_inner_packets;
data[i++] = tso_inner_bytes;
data[i++] = long_pkt_fmt;
data[i++] = short_pkt_fmt;
data[i++] = csum_partial;
data[i++] = mana_map_err;
}
}
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)
{
struct mana_port_context *apc = netdev_priv(ndev);
return apc->indir_table_sz;
}
static int mana_get_rxfh(struct net_device *ndev,
struct ethtool_rxfh_param *rxfh)
{
struct mana_port_context *apc = netdev_priv(ndev);
int i;
rxfh->hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */
if (rxfh->indir) {
for (i = 0; i < apc->indir_table_sz; i++)
rxfh->indir[i] = apc->indir_table[i];
}
if (rxfh->key)
memcpy(rxfh->key, apc->hashkey, MANA_HASH_KEY_SIZE);
return 0;
}
static int mana_set_rxfh(struct net_device *ndev,
struct ethtool_rxfh_param *rxfh,
struct netlink_ext_ack *extack)
{
struct mana_port_context *apc = netdev_priv(ndev);
bool update_hash = false, update_table = false;
u8 save_key[MANA_HASH_KEY_SIZE];
u32 *save_table;
int i, err;
if (!apc->port_is_up)
return -EOPNOTSUPP;
if (rxfh->hfunc != ETH_RSS_HASH_NO_CHANGE &&
rxfh->hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
save_table = kcalloc(apc->indir_table_sz, sizeof(u32), GFP_KERNEL);
if (!save_table)
return -ENOMEM;
if (rxfh->indir) {
for (i = 0; i < apc->indir_table_sz; i++)
if (rxfh->indir[i] >= apc->num_queues) {
err = -EINVAL;
goto cleanup;
}
update_table = true;
for (i = 0; i < apc->indir_table_sz; i++) {
save_table[i] = apc->indir_table[i];
apc->indir_table[i] = rxfh->indir[i];
}
}
if (rxfh->key) {
update_hash = true;
memcpy(save_key, apc->hashkey, MANA_HASH_KEY_SIZE);
memcpy(apc->hashkey, rxfh->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 < apc->indir_table_sz; 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);
}
cleanup:
kfree(save_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;
err = mana_pre_alloc_rxbufs(apc, ndev->mtu, new_count);
if (err) {
netdev_err(ndev, "Insufficient memory for new allocations");
return err;
}
err = mana_detach(ndev, false);
if (err) {
netdev_err(ndev, "mana_detach failed: %d\n", err);
goto out;
}
apc->num_queues = new_count;
err = mana_attach(ndev);
if (err) {
apc->num_queues = old_count;
netdev_err(ndev, "mana_attach failed: %d\n", err);
}
out:
mana_pre_dealloc_rxbufs(apc);
return err;
}
static void mana_get_ringparam(struct net_device *ndev,
struct ethtool_ringparam *ring,
struct kernel_ethtool_ringparam *kernel_ring,
struct netlink_ext_ack *extack)
{
struct mana_port_context *apc = netdev_priv(ndev);
ring->rx_pending = apc->rx_queue_size;
ring->tx_pending = apc->tx_queue_size;
ring->rx_max_pending = MAX_RX_BUFFERS_PER_QUEUE;
ring->tx_max_pending = MAX_TX_BUFFERS_PER_QUEUE;
}
static int mana_set_ringparam(struct net_device *ndev,
struct ethtool_ringparam *ring,
struct kernel_ethtool_ringparam *kernel_ring,
struct netlink_ext_ack *extack)
{
struct mana_port_context *apc = netdev_priv(ndev);
u32 new_tx, new_rx;
u32 old_tx, old_rx;
int err;
old_tx = apc->tx_queue_size;
old_rx = apc->rx_queue_size;
if (ring->tx_pending < MIN_TX_BUFFERS_PER_QUEUE) {
NL_SET_ERR_MSG_FMT(extack, "tx:%d less than the min:%d", ring->tx_pending,
MIN_TX_BUFFERS_PER_QUEUE);
return -EINVAL;
}
if (ring->rx_pending < MIN_RX_BUFFERS_PER_QUEUE) {
NL_SET_ERR_MSG_FMT(extack, "rx:%d less than the min:%d", ring->rx_pending,
MIN_RX_BUFFERS_PER_QUEUE);
return -EINVAL;
}
new_rx = roundup_pow_of_two(ring->rx_pending);
new_tx = roundup_pow_of_two(ring->tx_pending);
netdev_info(ndev, "Using nearest power of 2 values for Txq:%d Rxq:%d\n",
new_tx, new_rx);
/* pre-allocating new buffers to prevent failures in mana_attach() later */
apc->rx_queue_size = new_rx;
err = mana_pre_alloc_rxbufs(apc, ndev->mtu, apc->num_queues);
apc->rx_queue_size = old_rx;
if (err) {
netdev_err(ndev, "Insufficient memory for new allocations\n");
return err;
}
err = mana_detach(ndev, false);
if (err) {
netdev_err(ndev, "mana_detach failed: %d\n", err);
goto out;
}
apc->tx_queue_size = new_tx;
apc->rx_queue_size = new_rx;
err = mana_attach(ndev);
if (err) {
netdev_err(ndev, "mana_attach failed: %d\n", err);
apc->tx_queue_size = old_tx;
apc->rx_queue_size = old_rx;
}
out:
mana_pre_dealloc_rxbufs(apc);
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,
.get_ringparam = mana_get_ringparam,
.set_ringparam = mana_set_ringparam,
};
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