[dpdk-stable] [PATCH 19.11 1/6] net/bnxt: fix auto-negotiation on Whitney+

[Kalesh A P]

From: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>

[ upstream commit 70c7d4184cb9a32ab6c65ce67ce5fbe3a5be5294 ]

Driver should enable autoneg on a port if FW supports it.
Because of a wrong check, driver is not enabling autoneg
on a port after setting forced speed on Whitney+.

There was some dependency on other changes which are not there
in the 19.11 stable. Merged the minimal needed changes for this.

Fixes: 7bc8e9a227cc ("net/bnxt: support async link notification")

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.h        |  1 +
 drivers/net/bnxt/bnxt_ethdev.c |  2 ++
 drivers/net/bnxt/bnxt_hwrm.c   | 43 +++++++++++++++++++++++++++++++++---------
 drivers/net/bnxt/bnxt_hwrm.h   |  1 +
 4 files changed, 38 insertions(+), 9 deletions(-)

diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
index 335c88d..60173e4 100644
--- a/drivers/net/bnxt/bnxt.h
+++ b/drivers/net/bnxt/bnxt.h
@@ -251,6 +251,7 @@ struct bnxt_link_info {
 	uint8_t			phy_ver[PHY_VER_LEN];
 	uint16_t		link_speed;
 	uint16_t		support_speeds;
+	uint16_t                support_auto_speeds;
 	uint16_t		auto_link_speed;
 	uint16_t		force_link_speed;
 	uint16_t		auto_link_speed_mask;
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 5ca0317..64df248 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -4993,6 +4993,8 @@ static int bnxt_init_fw(struct bnxt *bp)
 
 	bnxt_hwrm_port_led_qcaps(bp);
 
+	bnxt_hwrm_port_phy_qcaps(bp);
+
 	return 0;
 }
 
diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index d1f6d23..e354df1 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -1239,6 +1239,7 @@ static int bnxt_hwrm_port_phy_qcfg(struct bnxt *bp,
 
 	link_info->support_speeds = rte_le_to_cpu_16(resp->support_speeds);
 	link_info->auto_link_speed = rte_le_to_cpu_16(resp->auto_link_speed);
+	link_info->auto_link_speed_mask = rte_le_to_cpu_16(resp->auto_link_speed_mask);
 	link_info->preemphasis = rte_le_to_cpu_32(resp->preemphasis);
 	link_info->force_link_speed = rte_le_to_cpu_16(resp->force_link_speed);
 	link_info->phy_ver[0] = resp->phy_maj;
@@ -2885,15 +2886,8 @@ int bnxt_set_hwrm_link_config(struct bnxt *bp, bool link_up)
 
 	speed = bnxt_parse_eth_link_speed(dev_conf->link_speeds);
 	link_req.phy_flags = HWRM_PORT_PHY_CFG_INPUT_FLAGS_RESET_PHY;
-	/* Autoneg can be done only when the FW allows.
-	 * When user configures fixed speed of 40G and later changes to
-	 * any other speed, auto_link_speed/force_link_speed is still set
-	 * to 40G until link comes up at new speed.
-	 */
-	if (autoneg == 1 &&
-	    !(!BNXT_CHIP_THOR(bp) &&
-	      (bp->link_info.auto_link_speed ||
-	       bp->link_info.force_link_speed))) {
+	/* Autoneg can be done only when the FW allows. */
+	if (autoneg == 1 && bp->link_info.support_auto_speeds) {
 		link_req.phy_flags |=
 				HWRM_PORT_PHY_CFG_INPUT_FLAGS_RESTART_AUTONEG;
 		link_req.auto_link_speed_mask =
@@ -5122,3 +5116,34 @@ int bnxt_hwrm_poll_ver_get(struct bnxt *bp)
 
 	return rc;
 }
+
+int bnxt_hwrm_port_phy_qcaps(struct bnxt *bp)
+{
+	int rc = 0;
+	struct hwrm_port_phy_qcaps_input req = {0};
+	struct hwrm_port_phy_qcaps_output *resp = bp->hwrm_cmd_resp_addr;
+	struct bnxt_link_info *link_info = &bp->link_info;
+
+	if (BNXT_VF(bp) && !BNXT_VF_IS_TRUSTED(bp))
+		return 0;
+
+	HWRM_PREP(req, PORT_PHY_QCAPS, BNXT_USE_CHIMP_MB);
+
+	rc = bnxt_hwrm_send_message(bp, &req, sizeof(req), BNXT_USE_CHIMP_MB);
+
+	HWRM_CHECK_RESULT();
+
+	if (resp->supported_speeds_auto_mode)
+		link_info->support_auto_speeds =
+			rte_le_to_cpu_16(resp->supported_speeds_auto_mode);
+
+	/* Older firmware does not have supported_auto_speeds, so assume
+	 * that all supported speeds can be autonegotiated.
+	 */
+	if (link_info->auto_link_speed_mask && !link_info->support_auto_speeds)
+		link_info->support_auto_speeds = link_info->support_speeds;
+
+	HWRM_UNLOCK();
+
+	return 0;
+}
diff --git a/drivers/net/bnxt/bnxt_hwrm.h b/drivers/net/bnxt/bnxt_hwrm.h
index 7b2432f..b8fb37d 100644
--- a/drivers/net/bnxt/bnxt_hwrm.h
+++ b/drivers/net/bnxt/bnxt_hwrm.h
@@ -228,4 +228,5 @@ int bnxt_hwrm_port_ts_query(struct bnxt *bp, uint8_t path,
 int bnxt_clear_one_vnic_filter(struct bnxt *bp,
 			       struct bnxt_filter_info *filter);
 int bnxt_hwrm_poll_ver_get(struct bnxt *bp);
+int bnxt_hwrm_port_phy_qcaps(struct bnxt *bp);
 #endif
-- 
2.10.1