ice: implement ethtool standard stats

Add support for MAC/pause/RMON stats. This enables reporting hardware
statistics in a common way via:

ethtool -S eth0 --all-groups
and
ethtool --include-statistics --show-pause eth0

While doing so, add support for one new stat, receive length error
(RLEC), which is extremely unlikely to happen since most L2 frames have
a type/length field specifying a "type", and raw ethernet frames aren't
used much any longer.

NOTE: I didn't implement Ctrl aka control frame stats because the
hardware doesn't seem to implement support.

Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20251016-jk-iwl-next-2025-10-15-v2-9-ff3a390d9fc6@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

3 files changed, 82 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index dc131779d426..d1ec7e6f12bf 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -4661,6 +4661,81 @@ static void ice_get_fec_stats(struct net_device *netdev,
 			    pi->lport, err);
 }
 
+static void ice_get_eth_mac_stats(struct net_device *netdev,
+				  struct ethtool_eth_mac_stats *mac_stats)
+{
+	struct ice_pf *pf = ice_netdev_to_pf(netdev);
+	struct ice_hw_port_stats *ps = &pf->stats;
+
+	mac_stats->FramesTransmittedOK = ps->eth.tx_unicast +
+					 ps->eth.tx_multicast +
+					 ps->eth.tx_broadcast;
+	mac_stats->FramesReceivedOK = ps->eth.rx_unicast +
+				      ps->eth.rx_multicast +
+				      ps->eth.rx_broadcast;
+	mac_stats->FrameCheckSequenceErrors = ps->crc_errors;
+	mac_stats->OctetsTransmittedOK = ps->eth.tx_bytes;
+	mac_stats->OctetsReceivedOK = ps->eth.rx_bytes;
+	mac_stats->MulticastFramesXmittedOK = ps->eth.tx_multicast;
+	mac_stats->BroadcastFramesXmittedOK = ps->eth.tx_broadcast;
+	mac_stats->MulticastFramesReceivedOK = ps->eth.rx_multicast;
+	mac_stats->BroadcastFramesReceivedOK = ps->eth.rx_broadcast;
+	mac_stats->InRangeLengthErrors = ps->rx_len_errors;
+	mac_stats->FrameTooLongErrors = ps->rx_oversize;
+}
+
+static void ice_get_pause_stats(struct net_device *netdev,
+				struct ethtool_pause_stats *pause_stats)
+{
+	struct ice_pf *pf = ice_netdev_to_pf(netdev);
+	struct ice_hw_port_stats *ps = &pf->stats;
+
+	pause_stats->tx_pause_frames = ps->link_xon_tx + ps->link_xoff_tx;
+	pause_stats->rx_pause_frames = ps->link_xon_rx + ps->link_xoff_rx;
+}
+
+static const struct ethtool_rmon_hist_range ice_rmon_ranges[] = {
+	{    0,    64 },
+	{   65,   127 },
+	{  128,   255 },
+	{  256,   511 },
+	{  512,  1023 },
+	{ 1024,  1522 },
+	{ 1523,  9522 },
+	{}
+};
+
+static void ice_get_rmon_stats(struct net_device *netdev,
+			       struct ethtool_rmon_stats *rmon,
+			       const struct ethtool_rmon_hist_range **ranges)
+{
+	struct ice_pf *pf = ice_netdev_to_pf(netdev);
+	struct ice_hw_port_stats *ps = &pf->stats;
+
+	rmon->undersize_pkts	= ps->rx_undersize;
+	rmon->oversize_pkts	= ps->rx_oversize;
+	rmon->fragments		= ps->rx_fragments;
+	rmon->jabbers		= ps->rx_jabber;
+
+	rmon->hist[0]		= ps->rx_size_64;
+	rmon->hist[1]		= ps->rx_size_127;
+	rmon->hist[2]		= ps->rx_size_255;
+	rmon->hist[3]		= ps->rx_size_511;
+	rmon->hist[4]		= ps->rx_size_1023;
+	rmon->hist[5]		= ps->rx_size_1522;
+	rmon->hist[6]		= ps->rx_size_big;
+
+	rmon->hist_tx[0]	= ps->tx_size_64;
+	rmon->hist_tx[1]	= ps->tx_size_127;
+	rmon->hist_tx[2]	= ps->tx_size_255;
+	rmon->hist_tx[3]	= ps->tx_size_511;
+	rmon->hist_tx[4]	= ps->tx_size_1023;
+	rmon->hist_tx[5]	= ps->tx_size_1522;
+	rmon->hist_tx[6]	= ps->tx_size_big;
+
+	*ranges = ice_rmon_ranges;
+}
+
 #define ICE_ETHTOOL_PFR (ETH_RESET_IRQ | ETH_RESET_DMA | \
 	ETH_RESET_FILTER | ETH_RESET_OFFLOAD)
 
@@ -4744,6 +4819,9 @@ static const struct ethtool_ops ice_ethtool_ops = {
 	.get_link_ksettings	= ice_get_link_ksettings,
 	.set_link_ksettings	= ice_set_link_ksettings,
 	.get_fec_stats		= ice_get_fec_stats,
+	.get_eth_mac_stats	= ice_get_eth_mac_stats,
+	.get_pause_stats	= ice_get_pause_stats,
+	.get_rmon_stats		= ice_get_rmon_stats,
 	.get_drvinfo		= ice_get_drvinfo,
 	.get_regs_len		= ice_get_regs_len,
 	.get_regs		= ice_get_regs,
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 86f5859e88ef..3d5615caf6d1 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -7138,6 +7138,9 @@ void ice_update_pf_stats(struct ice_pf *pf)
 			  &prev_ps->mac_remote_faults,
 			  &cur_ps->mac_remote_faults);
 
+	ice_stat_update32(hw, GLPRT_RLEC(port), pf->stat_prev_loaded,
+			  &prev_ps->rx_len_errors, &cur_ps->rx_len_errors);
+
 	ice_stat_update32(hw, GLPRT_RUC(port), pf->stat_prev_loaded,
 			  &prev_ps->rx_undersize, &cur_ps->rx_undersize);
 
diff --git a/drivers/net/ethernet/intel/ice/ice_type.h b/drivers/net/ethernet/intel/ice/ice_type.h
index b0a1b67071c5..6a2ec8389a8f 100644
--- a/drivers/net/ethernet/intel/ice/ice_type.h
+++ b/drivers/net/ethernet/intel/ice/ice_type.h
@@ -1063,6 +1063,7 @@ struct ice_hw_port_stats {
 	u64 error_bytes;		/* errbc */
 	u64 mac_local_faults;		/* mlfc */
 	u64 mac_remote_faults;		/* mrfc */
+	u64 rx_len_errors;		/* rlec */
 	u64 link_xon_rx;		/* lxonrxc */
 	u64 link_xoff_rx;		/* lxoffrxc */
 	u64 link_xon_tx;		/* lxontxc */