netdev - [PATCH net-next 1/7] bnxt_en: Enhance TX pri counters

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Message-ID: <20251126215648.1885936-2-michael.chan@broadcom.com>
Date: Wed, 26 Nov 2025 13:56:42 -0800
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	pavan.chebbi@...adcom.com,
	andrew.gospodarek@...adcom.com
Subject: [PATCH net-next 1/7] bnxt_en: Enhance TX pri counters

The priority packet and byte counters in ethtool -S are returned by
the driver based on the pri2cos mapping.  The assumption is that each
priority is mapped to one and only one hardware CoS queue.  In a
special RoCE configuration, the FW uses combined CoS queue 0 and CoS
queue 1 for the priority mapped to CoS queue 0.  In this special
case, we need to add the CoS queue 0 and CoS queue 1 counters for
the priority packet and byte counters.

Reviewed-by: Andy Gospodarek <andrew.gospodarek@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c         |  5 +++++
 drivers/net/ethernet/broadcom/bnxt/bnxt.h         |  1 +
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 14 ++++++++++----
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index a625e7c311dd..148db3fe8fc2 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -8506,6 +8506,11 @@ static int bnxt_hwrm_func_qcfg(struct bnxt *bp)
 
 	if (flags & FUNC_QCFG_RESP_FLAGS_ENABLE_RDMA_SRIOV)
 		bp->fw_cap |= BNXT_FW_CAP_ENABLE_RDMA_SRIOV;
+	if (resp->roce_bidi_opt_mode &
+	    FUNC_QCFG_RESP_ROCE_BIDI_OPT_MODE_DEDICATED)
+		bp->cos0_cos1_shared = 1;
+	else
+		bp->cos0_cos1_shared = 0;
 
 	switch (resp->port_partition_type) {
 	case FUNC_QCFG_RESP_PORT_PARTITION_TYPE_NPAR1_0:
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 3613a172483a..aedb059f4ce5 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -2424,6 +2424,7 @@ struct bnxt {
 	u8			tc_to_qidx[BNXT_MAX_QUEUE];
 	u8			q_ids[BNXT_MAX_QUEUE];
 	u8			max_q;
+	u8			cos0_cos1_shared;
 	u8			num_tc;
 
 	u16			max_pfcwd_tmo_ms;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 41686a6f84b5..baac639f9c94 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -688,16 +688,22 @@ static void bnxt_get_ethtool_stats(struct net_device *dev,
 				buf[j] = *(rx_port_stats_ext + n);
 			}
 			for (i = 0; i < 8; i++, j++) {
-				long n = bnxt_tx_bytes_pri_arr[i].base_off +
-					 bp->pri2cos_idx[i];
+				u8 cos_idx = bp->pri2cos_idx[i];
+				long n;
 
+				n = bnxt_tx_bytes_pri_arr[i].base_off + cos_idx;
 				buf[j] = *(tx_port_stats_ext + n);
+				if (bp->cos0_cos1_shared && !cos_idx)
+					buf[j] += *(tx_port_stats_ext + n + 1);
 			}
 			for (i = 0; i < 8; i++, j++) {
-				long n = bnxt_tx_pkts_pri_arr[i].base_off +
-					 bp->pri2cos_idx[i];
+				u8 cos_idx = bp->pri2cos_idx[i];
+				long n;
 
+				n = bnxt_tx_pkts_pri_arr[i].base_off + cos_idx;
 				buf[j] = *(tx_port_stats_ext + n);
+				if (bp->cos0_cos1_shared && !cos_idx)
+					buf[j] += *(tx_port_stats_ext + n + 1);
 			}
 		}
 	}
-- 
2.51.0