bnxt_en: Add tx_resets ring counter

Add a new tx_resets ring counter.  This counter will be saved as
tx_total_resets across any reset.  Since we currently do a full reset
in bnxt_sched_reset_txr(), the per ring counter will always be cleared
during reset.  Only the tx_total_resets count will be meaningful and we
only display this under ethtool -S.

Link: https://lore.kernel.org/netdev/CACKFLimD-bKmJ1tGZOLYRjWzEwxkri-Mw7iFme1x2Dr0twdCeg@mail.gmail.com/
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20230817231911.165035-7-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index bea562d..5d6ea27 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -9397,6 +9397,8 @@ static void bnxt_disable_napi(struct bnxt *bp)
                struct bnxt_cp_ring_info *cpr;
 
                cpr = &bnapi->cp_ring;
+               if (bnapi->tx_fault)
+                       cpr->sw_stats.tx.tx_resets++;
                if (bnapi->in_reset)
                        cpr->sw_stats.rx.rx_resets++;
                napi_disable(&bnapi->napi);
@@ -10951,6 +10953,7 @@ static void bnxt_get_one_ring_err_stats(struct bnxt *bp,
        stats->rx_total_netpoll_discards += sw_stats->rx.rx_netpoll_discards;
        stats->rx_total_ring_discards +=
                BNXT_GET_RING_STATS64(hw_stats, rx_discard_pkts);
+       stats->tx_total_resets += sw_stats->tx.tx_resets;
        stats->tx_total_ring_discards +=
                BNXT_GET_RING_STATS64(hw_stats, tx_discard_pkts);
        stats->total_missed_irqs += sw_stats->cmn.missed_irqs;

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 7287fd3..84cbcfa 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -939,12 +939,17 @@ struct bnxt_rx_sw_stats {
        u64                     rx_netpoll_discards;
 };
 
+struct bnxt_tx_sw_stats {
+       u64                     tx_resets;
+};
+
 struct bnxt_cmn_sw_stats {
        u64                     missed_irqs;
 };
 
 struct bnxt_sw_stats {
        struct bnxt_rx_sw_stats rx;
+       struct bnxt_tx_sw_stats tx;
        struct bnxt_cmn_sw_stats cmn;
 };
 
@@ -955,6 +960,7 @@ struct bnxt_total_ring_err_stats {
        u64                     rx_total_oom_discards;
        u64                     rx_total_netpoll_discards;
        u64                     rx_total_ring_discards;
+       u64                     tx_total_resets;
        u64                     tx_total_ring_discards;
        u64                     total_missed_irqs;
 };

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index a9f1eed..547247d 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -346,6 +346,7 @@ static const char *const bnxt_ring_err_stats_arr[] = {
        "rx_total_oom_discards",
        "rx_total_netpoll_discards",
        "rx_total_ring_discards",
+       "tx_total_resets",
        "tx_total_ring_discards",
        "total_missed_irqs",
 };