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eth: fbnic: Fetch TX pause storm stats

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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 <kuba@kernel.org>
Signed-off-by: Mohsin Bashir <mohsin.bashr@gmail.com>
Link: https://patch.msgid.link/20260302230149.1580195-5-mohsin.bashr@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Mohsin Bashir
2026-03-02 15:01:48 -08:00
committed by Paolo Abeni
parent 9b7c8728f5
commit 8d282b680c
4 changed files with 20 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/meta/fbnic/fbnic_csr.h
View File

@@ -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 */

3
drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c
View File

@@ -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

1
drivers/net/ethernet/meta/fbnic/fbnic_hw_stats.h
View File

@@ -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 {

15
drivers/net/ethernet/meta/fbnic/fbnic_mac.c
View File

@@ -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