patch 'net/bnxt: fix 50G and 100G forced speed' has been queued to stable release 22.11.5

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 22.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/09/24. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/66f4540fa5d591c5c16586a758a21890d8bb19c0

Thanks.

Luca Boccassi

---
>From 66f4540fa5d591c5c16586a758a21890d8bb19c0 Mon Sep 17 00:00:00 2001
From: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>
Date: Thu, 16 Nov 2023 00:12:01 -0800
Subject: [PATCH] net/bnxt: fix 50G and 100G forced speed

[ upstream commit dd8d40bc8294ee1f5753205d14f37accc7a7debc ]

Thor based NICs can support PAM4 as well as NRZ link negotiation.
While PAM4 can negotiate speeds at 50G, 100G and 200G, the PMD will
use NRZ signaling for 50G and 100G speeds. PAM4 signaling will be
used only for 200G speed negotiations.

Driver has to check for NRZ speed support first while forcing speed.

Fixes: c23f9ded0391 ("net/bnxt: support 200G PAM4 link")

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur at broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
---
 drivers/net/bnxt/bnxt_hwrm.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index 51e1e2d6b3..45f92ff558 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -2972,6 +2972,8 @@ static uint16_t bnxt_check_eth_link_autoneg(uint32_t conf_link)
 static uint16_t bnxt_parse_eth_link_speed(uint32_t conf_link_speed,
 					  struct bnxt_link_info *link_info)
 {
+	uint16_t support_pam4_speeds = link_info->support_pam4_speeds;
+	uint16_t support_speeds = link_info->support_speeds;
 	uint16_t eth_link_speed = 0;
 
 	if (conf_link_speed == RTE_ETH_LINK_SPEED_AUTONEG)
@@ -3009,23 +3011,23 @@ static uint16_t bnxt_parse_eth_link_speed(uint32_t conf_link_speed,
 			HWRM_PORT_PHY_CFG_INPUT_FORCE_LINK_SPEED_40GB;
 		break;
 	case RTE_ETH_LINK_SPEED_50G:
-		if (link_info->support_pam4_speeds &
-		    HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_PAM4_SPEEDS_50G) {
-			eth_link_speed = HWRM_PORT_PHY_CFG_INPUT_FORCE_PAM4_LINK_SPEED_50GB;
-			link_info->link_signal_mode = BNXT_SIG_MODE_PAM4;
-		} else {
+		if (support_speeds & HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_SPEEDS_50GB) {
 			eth_link_speed = HWRM_PORT_PHY_CFG_INPUT_FORCE_LINK_SPEED_50GB;
 			link_info->link_signal_mode = BNXT_SIG_MODE_NRZ;
+		} else if (support_pam4_speeds &
+			   HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_PAM4_SPEEDS_50G) {
+			eth_link_speed = HWRM_PORT_PHY_CFG_INPUT_FORCE_PAM4_LINK_SPEED_50GB;
+			link_info->link_signal_mode = BNXT_SIG_MODE_PAM4;
 		}
 		break;
 	case RTE_ETH_LINK_SPEED_100G:
-		if (link_info->support_pam4_speeds &
-		    HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_PAM4_SPEEDS_100G) {
-			eth_link_speed = HWRM_PORT_PHY_CFG_INPUT_FORCE_PAM4_LINK_SPEED_100GB;
-			link_info->link_signal_mode = BNXT_SIG_MODE_PAM4;
-		} else {
+		if (support_speeds & HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_SPEEDS_100GB) {
 			eth_link_speed = HWRM_PORT_PHY_CFG_INPUT_FORCE_LINK_SPEED_100GB;
 			link_info->link_signal_mode = BNXT_SIG_MODE_NRZ;
+		} else if (support_pam4_speeds &
+			   HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_PAM4_SPEEDS_100G) {
+			eth_link_speed = HWRM_PORT_PHY_CFG_INPUT_FORCE_PAM4_LINK_SPEED_100GB;
+			link_info->link_signal_mode = BNXT_SIG_MODE_PAM4;
 		}
 		break;
 	case RTE_ETH_LINK_SPEED_200G:
-- 
2.39.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-03-07 01:05:42.032735646 +0000
+++ 0086-net-bnxt-fix-50G-and-100G-forced-speed.patch	2024-03-07 01:05:34.966943582 +0000
@@ -1 +1 @@
-From dd8d40bc8294ee1f5753205d14f37accc7a7debc Mon Sep 17 00:00:00 2001
+From 66f4540fa5d591c5c16586a758a21890d8bb19c0 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit dd8d40bc8294ee1f5753205d14f37accc7a7debc ]
+
@@ -14 +15,0 @@
-Cc: stable at dpdk.org
@@ -24 +25 @@
-index 2ae0cb2067..8f37077522 100644
+index 51e1e2d6b3..45f92ff558 100644
@@ -27 +28 @@
-@@ -3158,6 +3158,8 @@ static uint16_t bnxt_check_eth_link_autoneg(uint32_t conf_link)
+@@ -2972,6 +2972,8 @@ static uint16_t bnxt_check_eth_link_autoneg(uint32_t conf_link)
@@ -36 +37 @@
-@@ -3195,23 +3197,23 @@ static uint16_t bnxt_parse_eth_link_speed(uint32_t conf_link_speed,
+@@ -3009,23 +3011,23 @@ static uint16_t bnxt_parse_eth_link_speed(uint32_t conf_link_speed,