[dpdk-dev] [PATCH v2 1/5] net/bnxt: fix link failure during port toggle

[Ajit Khaparde]

From: Santoshkumar Karanappa Rastapur <santosh.rastapur at broadcom.com>

We need to wait for up to 500ms to receive async event notification after
forcing link down. Similarly we need to wait for up to 10s for link to
come up after configuring the hardware for link up.

Fixes: c09f57b49c13 ("net/bnxt: add start/stop/link update operations")
Cc: stable at dpdk.org

Signed-off-by: Santoshkumar Karanappa Rastapur <santosh.rastapur at broadcom.com>
Signed-off-by: Somnath Kotur <somnath.kotur at broadcom.com>
---
 drivers/net/bnxt/bnxt.h        | 10 ++++++----
 drivers/net/bnxt/bnxt_cpr.c    |  2 +-
 drivers/net/bnxt/bnxt_ethdev.c | 18 +++++++++++++-----
 3 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
index ab18e8acd..ab0b8dde1 100644
--- a/drivers/net/bnxt/bnxt.h
+++ b/drivers/net/bnxt/bnxt.h
@@ -231,9 +231,10 @@ struct bnxt_pf_info {
 	uint8_t			evb_mode;
 };
 
-/* Max wait time is 10 * 100ms = 1s */
-#define BNXT_LINK_WAIT_CNT	10
-#define BNXT_LINK_WAIT_INTERVAL	100
+/* Max wait time for link up is 10s and link down is 500ms */
+#define BNXT_LINK_UP_WAIT_CNT	200
+#define BNXT_LINK_DOWN_WAIT_CNT	10
+#define BNXT_LINK_WAIT_INTERVAL	50
 struct bnxt_link_info {
 	uint32_t		phy_flags;
 	uint8_t			mac_type;
@@ -656,7 +657,8 @@ struct bnxt {
 };
 
 int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu);
-int bnxt_link_update_op(struct rte_eth_dev *eth_dev, int wait_to_complete);
+int bnxt_link_update(struct rte_eth_dev *eth_dev, int wait_to_complete,
+		     bool exp_link_status);
 int bnxt_rcv_msg_from_vf(struct bnxt *bp, uint16_t vf_id, void *msg);
 int is_bnxt_in_error(struct bnxt *bp);
 uint16_t bnxt_rss_ctxts(const struct bnxt *bp);
diff --git a/drivers/net/bnxt/bnxt_cpr.c b/drivers/net/bnxt/bnxt_cpr.c
index 2c3129fe2..bb316b9e0 100644
--- a/drivers/net/bnxt/bnxt_cpr.c
+++ b/drivers/net/bnxt/bnxt_cpr.c
@@ -63,7 +63,7 @@ void bnxt_handle_async_event(struct bnxt *bp,
 	case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_LINK_SPEED_CHANGE:
 	case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_LINK_SPEED_CFG_CHANGE:
 		/* FALLTHROUGH */
-		bnxt_link_update_op(bp->eth_dev, 0);
+		bnxt_link_update(bp->eth_dev, 0, ETH_LINK_UP);
 		break;
 	case HWRM_ASYNC_EVENT_CMPL_EVENT_ID_PF_DRVR_UNLOAD:
 		PMD_DRV_LOG(INFO, "Async event: PF driver unloaded\n");
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 1b4ed293d..88df82b86 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -856,7 +856,7 @@ static int bnxt_dev_start_op(struct rte_eth_dev *eth_dev)
 
 	eth_dev->data->scattered_rx = bnxt_scattered_rx(eth_dev);
 
-	bnxt_link_update_op(eth_dev, 1);
+	bnxt_link_update(eth_dev, 1, ETH_LINK_UP);
 
 	if (rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
 		vlan_mask |= ETH_VLAN_FILTER_MASK;
@@ -940,7 +940,7 @@ static void bnxt_dev_stop_op(struct rte_eth_dev *eth_dev)
 	 * During reset recovery, there is no need to wait
 	 */
 	if (!is_bnxt_in_error(bp))
-		rte_delay_ms(BNXT_LINK_WAIT_INTERVAL * 2);
+		bnxt_link_update(eth_dev, 1, ETH_LINK_DOWN);
 
 	/* Clean queue intr-vector mapping */
 	rte_intr_efd_disable(intr_handle);
@@ -1086,12 +1086,14 @@ static int bnxt_mac_addr_add_op(struct rte_eth_dev *eth_dev,
 	return rc;
 }
 
-int bnxt_link_update_op(struct rte_eth_dev *eth_dev, int wait_to_complete)
+int bnxt_link_update(struct rte_eth_dev *eth_dev, int wait_to_complete,
+		     bool exp_link_status)
 {
 	int rc = 0;
 	struct bnxt *bp = eth_dev->data->dev_private;
 	struct rte_eth_link new;
-	unsigned int cnt = BNXT_LINK_WAIT_CNT;
+	int cnt = exp_link_status ? BNXT_LINK_UP_WAIT_CNT :
+		  BNXT_LINK_DOWN_WAIT_CNT;
 
 	rc = is_bnxt_in_error(bp);
 	if (rc)
@@ -1109,7 +1111,7 @@ int bnxt_link_update_op(struct rte_eth_dev *eth_dev, int wait_to_complete)
 			goto out;
 		}
 
-		if (!wait_to_complete || new.link_status)
+		if (!wait_to_complete || new.link_status == exp_link_status)
 			break;
 
 		rte_delay_ms(BNXT_LINK_WAIT_INTERVAL);
@@ -1131,6 +1133,12 @@ int bnxt_link_update_op(struct rte_eth_dev *eth_dev, int wait_to_complete)
 	return rc;
 }
 
+static int bnxt_link_update_op(struct rte_eth_dev *eth_dev,
+			       int wait_to_complete)
+{
+	return bnxt_link_update(eth_dev, wait_to_complete, ETH_LINK_UP);
+}
+
 static int bnxt_promiscuous_enable_op(struct rte_eth_dev *eth_dev)
 {
 	struct bnxt *bp = eth_dev->data->dev_private;
-- 
2.21.0 (Apple Git-122.2)