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// SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause
/* Ethtool support for Mellanox Gigabit Ethernet driver
*
* Copyright (C) 2020-2021 NVIDIA CORPORATION & AFFILIATES
*/
#include <linux/phy.h>
#include "mlxbf_gige.h"
#include "mlxbf_gige_regs.h"
/* Start of struct ethtool_ops functions */
static int mlxbf_gige_get_regs_len(struct net_device *netdev)
{
return MLXBF_GIGE_MMIO_REG_SZ;
}
static void mlxbf_gige_get_regs(struct net_device *netdev,
struct ethtool_regs *regs, void *p)
{
struct mlxbf_gige *priv = netdev_priv(netdev);
regs->version = MLXBF_GIGE_REGS_VERSION;
/* Read entire MMIO register space and store results
* into the provided buffer. By design, a read to an
* offset without an existing register will be
* acknowledged and return zero.
*/
memcpy_fromio(p, priv->base, MLXBF_GIGE_MMIO_REG_SZ);
}
static void
mlxbf_gige_get_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ering,
struct kernel_ethtool_ringparam *kernel_ering,
struct netlink_ext_ack *extack)
{
struct mlxbf_gige *priv = netdev_priv(netdev);
ering->rx_max_pending = MLXBF_GIGE_MAX_RXQ_SZ;
ering->tx_max_pending = MLXBF_GIGE_MAX_TXQ_SZ;
ering->rx_pending = priv->rx_q_entries;
ering->tx_pending = priv->tx_q_entries;
}
static const struct {
const char string[ETH_GSTRING_LEN];
} mlxbf_gige_ethtool_stats_keys[] = {
{ "hw_access_errors" },
{ "tx_invalid_checksums" },
{ "tx_small_frames" },
{ "tx_index_errors" },
{ "sw_config_errors" },
{ "sw_access_errors" },
{ "rx_truncate_errors" },
{ "rx_mac_errors" },
{ "rx_din_dropped_pkts" },
{ "tx_fifo_full" },
{ "rx_filter_passed_pkts" },
{ "rx_filter_discard_pkts" },
};
static int mlxbf_gige_get_sset_count(struct net_device *netdev, int stringset)
{
if (stringset != ETH_SS_STATS)
return -EOPNOTSUPP;
return ARRAY_SIZE(mlxbf_gige_ethtool_stats_keys);
}
static void mlxbf_gige_get_strings(struct net_device *netdev, u32 stringset,
u8 *buf)
{
if (stringset != ETH_SS_STATS)
return;
memcpy(buf, &mlxbf_gige_ethtool_stats_keys,
sizeof(mlxbf_gige_ethtool_stats_keys));
}
static void mlxbf_gige_get_ethtool_stats(struct net_device *netdev,
struct ethtool_stats *estats,
u64 *data)
{
struct mlxbf_gige *priv = netdev_priv(netdev);
/* Fill data array with interface statistics
*
* NOTE: the data writes must be in
* sync with the strings shown in
* the mlxbf_gige_ethtool_stats_keys[] array
*
* NOTE2: certain statistics below are zeroed upon
* port disable, so the calculation below
* must include the "cached" value of the stat
* plus the value read directly from hardware.
* Cached statistics are currently:
* rx_din_dropped_pkts
* rx_filter_passed_pkts
* rx_filter_discard_pkts
*/
*data++ = priv->stats.hw_access_errors;
*data++ = priv->stats.tx_invalid_checksums;
*data++ = priv->stats.tx_small_frames;
*data++ = priv->stats.tx_index_errors;
*data++ = priv->stats.sw_config_errors;
*data++ = priv->stats.sw_access_errors;
*data++ = priv->stats.rx_truncate_errors;
*data++ = priv->stats.rx_mac_errors;
*data++ = (priv->stats.rx_din_dropped_pkts +
readq(priv->base + MLXBF_GIGE_RX_DIN_DROP_COUNTER));
*data++ = priv->stats.tx_fifo_full;
*data++ = (priv->stats.rx_filter_passed_pkts +
readq(priv->base + MLXBF_GIGE_RX_PASS_COUNTER_ALL));
*data++ = (priv->stats.rx_filter_discard_pkts +
readq(priv->base + MLXBF_GIGE_RX_DISC_COUNTER_ALL));
}
static void mlxbf_gige_get_pauseparam(struct net_device *netdev,
struct ethtool_pauseparam *pause)
{
pause->autoneg = AUTONEG_DISABLE;
pause->rx_pause = 1;
pause->tx_pause = 1;
}
static bool mlxbf_gige_llu_counters_enabled(struct mlxbf_gige *priv)
{
u32 data;
if (priv->hw_version == MLXBF_GIGE_VERSION_BF2) {
data = readl(priv->llu_base + MLXBF_GIGE_BF2_LLU_GENERAL_CONFIG);
if (data & MLXBF_GIGE_BF2_LLU_COUNTERS_EN)
return true;
} else {
data = readl(priv->llu_base + MLXBF_GIGE_BF3_LLU_GENERAL_CONFIG);
if (data & MLXBF_GIGE_BF3_LLU_COUNTERS_EN)
return true;
}
return false;
}
static void mlxbf_gige_get_pause_stats(struct net_device *netdev,
struct ethtool_pause_stats *pause_stats)
{
struct mlxbf_gige *priv = netdev_priv(netdev);
u64 data_lo, data_hi;
/* Read LLU counters to provide stats only if counters are enabled */
if (mlxbf_gige_llu_counters_enabled(priv)) {
data_lo = readl(priv->llu_base + MLXBF_GIGE_TX_PAUSE_CNT_LO);
data_hi = readl(priv->llu_base + MLXBF_GIGE_TX_PAUSE_CNT_HI);
pause_stats->tx_pause_frames = (data_hi << 32) | data_lo;
data_lo = readl(priv->llu_base + MLXBF_GIGE_RX_PAUSE_CNT_LO);
data_hi = readl(priv->llu_base + MLXBF_GIGE_RX_PAUSE_CNT_HI);
pause_stats->rx_pause_frames = (data_hi << 32) | data_lo;
}
}
const struct ethtool_ops mlxbf_gige_ethtool_ops = {
.get_link = ethtool_op_get_link,
.get_ringparam = mlxbf_gige_get_ringparam,
.get_regs_len = mlxbf_gige_get_regs_len,
.get_regs = mlxbf_gige_get_regs,
.get_strings = mlxbf_gige_get_strings,
.get_sset_count = mlxbf_gige_get_sset_count,
.get_ethtool_stats = mlxbf_gige_get_ethtool_stats,
.nway_reset = phy_ethtool_nway_reset,
.get_pauseparam = mlxbf_gige_get_pauseparam,
.get_pause_stats = mlxbf_gige_get_pause_stats,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
};
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