[dpdk-stable] patch 'net/bnxt: handle Rx multi queue creation properly' has been queued to stable release 17.08.1

[Yuanhan Liu <yliu@fridaylinux.org>]

Hi,

FYI, your patch has been queued to stable release 17.08.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/24/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From c1fc3619ba5f2104ef9286e5d81be1a45f7377ae Mon Sep 17 00:00:00 2001
From: Ajit Khaparde <ajit.khaparde@broadcom.com>
Date: Tue, 24 Oct 2017 16:19:42 -0500
Subject: [PATCH] net/bnxt: handle Rx multi queue creation properly

[ upstream commit 8103a57ab432a968f75aad661f7c9905bad77d1a ]

This patch simplifies logic for RSS queue creation.
1) Do not hardcode number of VNIC pools in case of RSS
2) Log a message if Number of queues is > RTE_ETHDEV_QUEUE_STAT_CNTRS
3) Move the check for allocation of l2_filter inside the for loop.

Fixes: 6133f207970c ("net/bnxt: add Rx queue create/destroy")

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c |  5 +++++
 drivers/net/bnxt/bnxt_rxq.c    | 18 ++++++------------
 2 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 9ad5e8a..4ccae5b 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -521,6 +521,11 @@ static int bnxt_dev_start_op(struct rte_eth_dev *eth_dev)
 	int vlan_mask = 0;
 	int rc;
 
+	if (bp->rx_cp_nr_rings > RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+		RTE_LOG(ERR, PMD,
+			"RxQ cnt %d > CONFIG_RTE_ETHDEV_QUEUE_STAT_CNTRS %d\n",
+			bp->rx_cp_nr_rings, RTE_ETHDEV_QUEUE_STAT_CNTRS);
+	}
 	bp->dev_stopped = 0;
 
 	rc = bnxt_init_nic(bp);
diff --git a/drivers/net/bnxt/bnxt_rxq.c b/drivers/net/bnxt/bnxt_rxq.c
index 2665ed5..ed168cc 100644
--- a/drivers/net/bnxt/bnxt_rxq.c
+++ b/drivers/net/bnxt/bnxt_rxq.c
@@ -68,7 +68,6 @@ int bnxt_mq_rx_configure(struct bnxt *bp)
 	struct bnxt_filter_info *filter;
 	enum rte_eth_nb_pools pools = bp->rx_cp_nr_rings, max_pools = 0;
 	struct bnxt_rx_queue *rxq;
-	bool rss_dflt_cr = false;
 
 	bp->nr_vnics = 0;
 
@@ -119,7 +118,7 @@ int bnxt_mq_rx_configure(struct bnxt *bp)
 				pools = max_pools;
 			break;
 		case ETH_MQ_RX_RSS:
-			pools = 1;
+			pools = bp->rx_cp_nr_rings;
 			break;
 		default:
 			RTE_LOG(ERR, PMD, "Unsupported mq_mod %d\n",
@@ -128,13 +127,6 @@ int bnxt_mq_rx_configure(struct bnxt *bp)
 			goto err_out;
 		}
 	}
-	/*
-	 * If MQ RX w/o RSS no need for per VNIC filter.
-	 */
-	if ((dev_conf->rxmode.mq_mode & ETH_MQ_RX_VMDQ_DCB) ||
-	    (bp->rx_cp_nr_rings &&
-	     !(dev_conf->rxmode.mq_mode & ETH_MQ_RX_RSS)))
-		rss_dflt_cr = true;
 
 	nb_q_per_grp = bp->rx_cp_nr_rings / pools;
 	start_grp_id = 0;
@@ -151,7 +143,7 @@ int bnxt_mq_rx_configure(struct bnxt *bp)
 		STAILQ_INSERT_TAIL(&bp->ff_pool[i], vnic, next);
 		bp->nr_vnics++;
 
-		for (j = 0, ring_idx = 0; j < nb_q_per_grp; j++, ring_idx++) {
+		for (j = 0; j < nb_q_per_grp; j++, ring_idx++) {
 			rxq = bp->eth_dev->data->rx_queues[ring_idx];
 			rxq->vnic = vnic;
 		}
@@ -166,8 +158,10 @@ int bnxt_mq_rx_configure(struct bnxt *bp)
 		vnic->start_grp_id = start_grp_id;
 		vnic->end_grp_id = end_grp_id;
 
-		if (rss_dflt_cr && i) {
-			vnic->rss_dflt_cr = true;
+		if (i) {
+			if (dev_conf->rxmode.mq_mode & ETH_MQ_RX_VMDQ_DCB ||
+			    !(dev_conf->rxmode.mq_mode & ETH_MQ_RX_RSS))
+				vnic->rss_dflt_cr = true;
 			goto skip_filter_allocation;
 		}
 		filter = bnxt_alloc_filter(bp);
-- 
2.7.4