net/bnxt: revert fix traffic stall on stop/start

This reverts commit aa2c00702bad7b2c742e11a86cb9dbbb8364fd88, which
introduced the possibility of an invalid address exception when running
an application with a stopped receive queue. The issues with rxq stop/start
 will be revisited in the 19.11 release timeframe.

Fixes: aa2c00702bad ("net/bnxt: fix traffic stall on Rx queue stop/start")
Cc: stable@dpdk.org
Signed-off-by: Lance Richardson <lance.richardson@broadcom.com>
Acked-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 25a345c..6685ee7 100644 (file)
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -1754,7 +1754,7 @@ bnxt_rxq_info_get_op(struct rte_eth_dev *dev, uint16_t queue_id,
 
        qinfo->conf.rx_free_thresh = rxq->rx_free_thresh;
        qinfo->conf.rx_drop_en = 0;
-       qinfo->conf.rx_deferred_start = rxq->rx_deferred_start;
+       qinfo->conf.rx_deferred_start = 0;
 }
 
 static void

diff --git a/drivers/net/bnxt/bnxt_ring.c b/drivers/net/bnxt/bnxt_ring.c
index a9fcdab..be15b4b 100644 (file)
--- a/drivers/net/bnxt/bnxt_ring.c
+++ b/drivers/net/bnxt/bnxt_ring.c
@@ -533,7 +533,8 @@ int bnxt_alloc_hwrm_rx_ring(struct bnxt *bp, int queue_index)
        rxq->rx_buf_use_size = BNXT_MAX_MTU + RTE_ETHER_HDR_LEN +
                RTE_ETHER_CRC_LEN + (2 * VLAN_TAG_SIZE);
 
-       if (!rxq->rx_deferred_start) {
+       if (bp->eth_dev->data->rx_queue_state[queue_index] ==
+           RTE_ETH_QUEUE_STATE_STARTED) {
                if (bnxt_init_one_rx_ring(rxq)) {
                        RTE_LOG(ERR, PMD,
                                "bnxt_init_one_rx_ring failed!\n");

diff --git a/drivers/net/bnxt/bnxt_rxq.c b/drivers/net/bnxt/bnxt_rxq.c
index 723e85f..1d95f11 100644 (file)
--- a/drivers/net/bnxt/bnxt_rxq.c
+++ b/drivers/net/bnxt/bnxt_rxq.c
@@ -436,9 +436,11 @@ int bnxt_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
                rc = bnxt_vnic_rss_configure(bp, vnic);
        }
 
-       if (rc == 0)
+       if (rc == 0) {
                dev->data->rx_queue_state[rx_queue_id] =
                                RTE_ETH_QUEUE_STATE_STARTED;
+               rxq->rx_deferred_start = false;
+       }
 
        PMD_DRV_LOG(INFO,
                    "queue %d, rx_deferred_start %d, state %d!\n",
@@ -473,6 +475,7 @@ int bnxt_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
        }
 
        dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
+       rxq->rx_deferred_start = true;
        PMD_DRV_LOG(DEBUG, "Rx queue stopped\n");
 
        if (dev_conf->rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG) {

diff --git a/drivers/net/bnxt/bnxt_txq.c b/drivers/net/bnxt/bnxt_txq.c
index ba8d390..43b3496 100644 (file)
--- a/drivers/net/bnxt/bnxt_txq.c
+++ b/drivers/net/bnxt/bnxt_txq.c
@@ -131,7 +131,6 @@ int bnxt_tx_queue_setup_op(struct rte_eth_dev *eth_dev,
 
        txq->queue_id = queue_idx;
        txq->port_id = eth_dev->data->port_id;
-       txq->tx_deferred_start = tx_conf->tx_deferred_start;
 
        /* Allocate TX ring hardware descriptors */
        if (bnxt_alloc_rings(bp, queue_idx, txq, NULL, txq->cp_ring,

diff --git a/drivers/net/bnxt/bnxt_txr.c b/drivers/net/bnxt/bnxt_txr.c
index 9adfee3..c71e6f1 100644 (file)
--- a/drivers/net/bnxt/bnxt_txr.c
+++ b/drivers/net/bnxt/bnxt_txr.c
@@ -506,6 +506,7 @@ int bnxt_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
        bnxt_handle_tx_cp(txq);
 
        dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
+       txq->tx_deferred_start = true;
        PMD_DRV_LOG(DEBUG, "Tx queue stopped\n");
 
        return 0;