patch 'net/bnxt: fix setting forced speed' has been queued to stable release 21.11.2

[Kevin Traynor <ktraynor@redhat.com>]

Hi,

FYI, your patch has been queued to stable release 21.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 06/30/22. 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/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/d16f5d2fa16215454d1c1fb69ee3e0d1996e5087

Thanks.

Kevin

---
From d16f5d2fa16215454d1c1fb69ee3e0d1996e5087 Mon Sep 17 00:00:00 2001
From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Date: Wed, 15 Jun 2022 20:27:00 +0530
Subject: [PATCH] net/bnxt: fix setting forced speed

[ upstream commit d9ae3e9d53253418e2f9f97b19849c0a625159ed ]

The "active_fec_signal_mode" in HWRM_PORT_PHY_QCFG response
does not return correct value till the link is up. Driver cannot
rely on active_fec_signal_mode while setting forced speed.

While setting forced speed of 50G/100G/200G, check if PAM4 speeds
are supported for the port first and then populate the HWRM request
accordingly.

Also, If PAM4 speed is supported, use PAM4 supported speed while
reporting speed capabilities.

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

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c | 11 ++++++-----
 drivers/net/bnxt/bnxt_hwrm.c   | 27 +++++++++++++++++++--------
 drivers/net/bnxt/bnxt_hwrm.h   |  3 +++
 3 files changed, 28 insertions(+), 13 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 8810a8f84a..00129c76e6 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -904,4 +904,5 @@ static int bnxt_shutdown_nic(struct bnxt *bp)
 uint32_t bnxt_get_speed_capabilities(struct bnxt *bp)
 {
+	uint32_t pam4_link_speed = 0;
 	uint32_t link_speed = 0;
 	uint32_t speed_capa = 0;
@@ -913,6 +914,6 @@ uint32_t bnxt_get_speed_capabilities(struct bnxt *bp)
 
 	/* If PAM4 is configured, use PAM4 supported speed */
-	if (link_speed == 0 && bp->link_info->support_pam4_speeds > 0)
-		link_speed = bp->link_info->support_pam4_speeds;
+	if (bp->link_info->support_pam4_speeds > 0)
+		pam4_link_speed = bp->link_info->support_pam4_speeds;
 
 	if (link_speed & HWRM_PORT_PHY_QCFG_OUTPUT_LINK_SPEED_100MB)
@@ -936,9 +937,9 @@ uint32_t bnxt_get_speed_capabilities(struct bnxt *bp)
 	if (link_speed & HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_SPEEDS_100GB)
 		speed_capa |= RTE_ETH_LINK_SPEED_100G;
-	if (link_speed & HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_PAM4_SPEEDS_50G)
+	if (pam4_link_speed & HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_PAM4_SPEEDS_50G)
 		speed_capa |= RTE_ETH_LINK_SPEED_50G;
-	if (link_speed & HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_PAM4_SPEEDS_100G)
+	if (pam4_link_speed & HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_PAM4_SPEEDS_100G)
 		speed_capa |= RTE_ETH_LINK_SPEED_100G;
-	if (link_speed & HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_PAM4_SPEEDS_200G)
+	if (pam4_link_speed & HWRM_PORT_PHY_QCFG_OUTPUT_SUPPORT_PAM4_SPEEDS_200G)
 		speed_capa |= RTE_ETH_LINK_SPEED_200G;
 
diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index 9eb8b8d56d..206ac20c0c 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -2971,5 +2971,5 @@ 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,
-					  uint16_t pam4_link)
+					  struct bnxt_link_info *link_info)
 {
 	uint16_t eth_link_speed = 0;
@@ -3010,16 +3010,27 @@ static uint16_t bnxt_parse_eth_link_speed(uint32_t conf_link_speed,
 		break;
 	case RTE_ETH_LINK_SPEED_50G:
-		eth_link_speed = pam4_link ?
-			HWRM_PORT_PHY_CFG_INPUT_FORCE_PAM4_LINK_SPEED_50GB :
-			HWRM_PORT_PHY_CFG_INPUT_FORCE_LINK_SPEED_50GB;
+		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 {
+			eth_link_speed = HWRM_PORT_PHY_CFG_INPUT_FORCE_LINK_SPEED_50GB;
+			link_info->link_signal_mode = BNXT_SIG_MODE_NRZ;
+		}
 		break;
 	case RTE_ETH_LINK_SPEED_100G:
-		eth_link_speed = pam4_link ?
-			HWRM_PORT_PHY_CFG_INPUT_FORCE_PAM4_LINK_SPEED_100GB :
-			HWRM_PORT_PHY_CFG_INPUT_FORCE_LINK_SPEED_100GB;
+		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 {
+			eth_link_speed = HWRM_PORT_PHY_CFG_INPUT_FORCE_LINK_SPEED_100GB;
+			link_info->link_signal_mode = BNXT_SIG_MODE_NRZ;
+		}
 		break;
 	case RTE_ETH_LINK_SPEED_200G:
 		eth_link_speed =
 			HWRM_PORT_PHY_CFG_INPUT_FORCE_PAM4_LINK_SPEED_200GB;
+		link_info->link_signal_mode = BNXT_SIG_MODE_PAM4;
 		break;
 	default:
@@ -3243,5 +3254,5 @@ int bnxt_set_hwrm_link_config(struct bnxt *bp, bool link_up)
 
 	speed = bnxt_parse_eth_link_speed(dev_conf->link_speeds,
-					  bp->link_info->link_signal_mode);
+					  bp->link_info);
 	link_req.phy_flags = HWRM_PORT_PHY_CFG_INPUT_FLAGS_RESET_PHY;
 	/* Autoneg can be done only when the FW allows. */
diff --git a/drivers/net/bnxt/bnxt_hwrm.h b/drivers/net/bnxt/bnxt_hwrm.h
index 77f8521406..a82d9fb3ef 100644
--- a/drivers/net/bnxt/bnxt_hwrm.h
+++ b/drivers/net/bnxt/bnxt_hwrm.h
@@ -142,4 +142,7 @@ struct bnxt_pf_resource_info {
 	 BNXT_TUNNELED_OFFLOADS_CAP_IPINIP_EN(bp))
 
+#define BNXT_SIG_MODE_NRZ	HWRM_PORT_PHY_QCFG_OUTPUT_SIGNAL_MODE_NRZ
+#define BNXT_SIG_MODE_PAM4	HWRM_PORT_PHY_QCFG_OUTPUT_SIGNAL_MODE_PAM4
+
 int bnxt_hwrm_cfa_l2_clear_rx_mask(struct bnxt *bp,
 				   struct bnxt_vnic_info *vnic);
-- 
2.34.3

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2022-06-28 16:18:04.586394963 +0100
+++ 0023-net-bnxt-fix-setting-forced-speed.patch	2022-06-28 16:18:04.062387174 +0100
@@ -1 +1 @@
-From d9ae3e9d53253418e2f9f97b19849c0a625159ed Mon Sep 17 00:00:00 2001
+From d16f5d2fa16215454d1c1fb69ee3e0d1996e5087 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit d9ae3e9d53253418e2f9f97b19849c0a625159ed ]
+
@@ -18 +19,0 @@
-Cc: stable@dpdk.org
@@ -30 +31 @@
-index 8181e1f37a..4e4791c2db 100644
+index 8810a8f84a..00129c76e6 100644