From: Mohsin Bashir Date: Mon, 2 Mar 2026 23:01:48 +0000 (-0800) Subject: eth: fbnic: Fetch TX pause storm stats X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8d282b680c729203d04d4eee396f3216f29b35aa;p=thirdparty%2Flinux.git eth: fbnic: Fetch TX pause storm stats With pause storm protection in place, track the occurrence of pause storm events. Since there is a one-to-one mapping between pause storm interrupts and events, use the interrupt count to track this metric. ./ethtool -I -a eth0 Pause parameters for eth0: Autonegotiate: off RX: off TX: on Statistics: tx_pause_frames: 759657 rx_pause_frames: 0 tx_pause_storm_events: 219 Signed-off-by: Jakub Kicinski Signed-off-by: Mohsin Bashir Link: https://patch.msgid.link/20260302230149.1580195-5-mohsin.bashr@gmail.com Signed-off-by: Paolo Abeni --- diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_csr.h b/drivers/net/ethernet/meta/fbnic/fbnic_csr.h index e68c56237b613..72eb22a525725 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_csr.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic_csr.h @@ -627,6 +627,7 @@ enum { FBNIC_RXB_ENQUEUE_INDICES = 4 }; +#define FBNIC_RXB_INTR_PS_COUNT(n) (0x080e9 + (n)) /* 0x203a4 + 4*n */ #define FBNIC_RXB_DRBO_FRM_CNT_SRC(n) (0x080f9 + (n)) /* 0x203e4 + 4*n */ #define FBNIC_RXB_DRBO_BYTE_CNT_SRC_L(n) \ (0x080fd + (n)) /* 0x203f4 + 4*n */ diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c index ade9e667640f4..70c995b8d1bd4 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c @@ -1754,6 +1754,7 @@ fbnic_get_pause_stats(struct net_device *netdev, struct fbnic_net *fbn = netdev_priv(netdev); struct fbnic_mac_stats *mac_stats; struct fbnic_dev *fbd = fbn->fbd; + u64 tx_ps_events; mac_stats = &fbd->hw_stats.mac; @@ -1761,6 +1762,8 @@ fbnic_get_pause_stats(struct net_device *netdev, pause_stats->tx_pause_frames = mac_stats->pause.tx_pause_frames.value; pause_stats->rx_pause_frames = mac_stats->pause.rx_pause_frames.value; + tx_ps_events = mac_stats->pause.tx_pause_storm_events.value; + pause_stats->tx_pause_storm_events = tx_ps_events; } static void diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.h b/drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.h index aa3f429a9aeda..caea4be46762a 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.h +++ b/drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.h @@ -54,6 +54,7 @@ struct fbnic_rmon_stats { struct fbnic_pause_stats { struct fbnic_stat_counter tx_pause_frames; struct fbnic_stat_counter rx_pause_frames; + struct fbnic_stat_counter tx_pause_storm_events; }; struct fbnic_eth_mac_stats { diff --git a/drivers/net/ethernet/meta/fbnic/fbnic_mac.c b/drivers/net/ethernet/meta/fbnic/fbnic_mac.c index 805107ba3b101..53b7a938b4c27 100644 --- a/drivers/net/ethernet/meta/fbnic/fbnic_mac.c +++ b/drivers/net/ethernet/meta/fbnic/fbnic_mac.c @@ -418,6 +418,18 @@ static void __fbnic_mac_stat_rd64(struct fbnic_dev *fbd, bool reset, u32 reg, stat->reported = true; } +static void fbnic_mac_stat_rd32(struct fbnic_dev *fbd, bool reset, u32 reg, + struct fbnic_stat_counter *stat) +{ + u32 new_reg_value; + + new_reg_value = rd32(fbd, reg); + if (!reset) + stat->value += new_reg_value - stat->u.old_reg_value_32; + stat->u.old_reg_value_32 = new_reg_value; + stat->reported = true; +} + #define fbnic_mac_stat_rd64(fbd, reset, __stat, __CSR) \ __fbnic_mac_stat_rd64(fbd, reset, FBNIC_##__CSR##_L, &(__stat)) @@ -812,6 +824,9 @@ fbnic_mac_get_pause_stats(struct fbnic_dev *fbd, bool reset, MAC_STAT_TX_XOFF_STB); fbnic_mac_stat_rd64(fbd, reset, pause_stats->rx_pause_frames, MAC_STAT_RX_XOFF_STB); + fbnic_mac_stat_rd32(fbd, reset, + FBNIC_RXB_INTR_PS_COUNT(FBNIC_RXB_INTF_NET), + &pause_stats->tx_pause_storm_events); } static void