From: Michael Chan <michael.chan@broadcom.com>
Date: Sun, 4 Oct 2020 15:22:59 -0400
Subject: bnxt_en: Add a software counter for RX ring reset.
Patch-mainline: v5.10-rc1
Git-commit: 8a27d4b9e54cdc9e3f45d3d11b0c898e92dace39
References: jsc#SLE-16649

Add a per ring rx_resets counter to count these RX resets.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c         |   14 ++++++++++----
 drivers/net/ethernet/broadcom/bnxt/bnxt.h         |    1 +
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c |    1 +
 3 files changed, 12 insertions(+), 4 deletions(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -8774,14 +8774,19 @@ static void bnxt_enable_napi(struct bnxt
 	int i;
 
 	for (i = 0; i < bp->cp_nr_rings; i++) {
-		struct bnxt_cp_ring_info *cpr = &bp->bnapi[i]->cp_ring;
-		bp->bnapi[i]->in_reset = false;
+		struct bnxt_napi *bnapi = bp->bnapi[i];
+		struct bnxt_cp_ring_info *cpr;
+
+		cpr = &bnapi->cp_ring;
+		if (bnapi->in_reset)
+			cpr->sw_stats.rx.rx_resets++;
+		bnapi->in_reset = false;
 
-		if (bp->bnapi[i]->rx_ring) {
+		if (bnapi->rx_ring) {
 			INIT_WORK(&cpr->dim.work, bnxt_dim_work);
 			cpr->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
 		}
-		napi_enable(&bp->bnapi[i]->napi);
+		napi_enable(&bnapi->napi);
 	}
 }
 
@@ -10708,6 +10713,7 @@ static void bnxt_rx_ring_reset(struct bn
 		rxr->bnapi->in_reset = false;
 		bnxt_alloc_one_rx_ring(bp, i);
 		cpr = &rxr->bnapi->cp_ring;
+		cpr->sw_stats.rx.rx_resets++;
 		if (bp->flags & BNXT_FLAG_AGG_RINGS)
 			bnxt_db_write(bp, &rxr->rx_agg_db, rxr->rx_agg_prod);
 		bnxt_db_write(bp, &rxr->rx_db, rxr->rx_prod);
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -905,6 +905,7 @@ struct bnxt_rx_ring_info {
 
 struct bnxt_rx_sw_stats {
 	u64			rx_l4_csum_errors;
+	u64			rx_resets;
 	u64			rx_buf_errors;
 };
 
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -178,6 +178,7 @@ static const char * const bnxt_ring_tpa2
 
 static const char * const bnxt_rx_sw_stats_str[] = {
 	"rx_l4_csum_errors",
+	"rx_resets",
 	"rx_buf_errors",
 };