[PATCH 19.11 1/8] net/bnxt: fix queue stop operation

[Kalesh A P <kalesh-anakkur.purayil@broadcom.com>]

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

[ upstream commit 3e6fae2b65aa778dba5059ec0bc92102f05adc54 ]

When there are no active Rx queues(i.e when all queues have been
stopped), clear the RSS redirection table of the VNIC on Thor.

Fixes: 9b63c6fd70e3 ("net/bnxt: support Rx/Tx queue start/stop")

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>
Reviewed-by: Lance Richardson <lance.richardson@broadcom.com>
---
 drivers/net/bnxt/bnxt_hwrm.c | 23 +++++++++++++++++++++++
 drivers/net/bnxt/bnxt_hwrm.h |  1 +
 drivers/net/bnxt/bnxt_rxq.c  |  3 +++
 3 files changed, 27 insertions(+)

diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index 25e6b8c..6ab8ca7 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -5258,3 +5258,26 @@ int bnxt_hwrm_port_phy_qcaps(struct bnxt *bp)
 
 	return 0;
 }
+
+int
+bnxt_vnic_rss_clear_p5(struct bnxt *bp, struct bnxt_vnic_info *vnic)
+{
+	struct hwrm_vnic_rss_cfg_output *resp = bp->hwrm_cmd_resp_addr;
+	struct hwrm_vnic_rss_cfg_input req = {0};
+	int nr_ctxs = vnic->num_lb_ctxts;
+	int i, rc = 0;
+
+	for (i = 0; i < nr_ctxs; i++) {
+		HWRM_PREP(req, VNIC_RSS_CFG, BNXT_USE_CHIMP_MB);
+
+		req.rss_ctx_idx = rte_cpu_to_le_16(vnic->fw_grp_ids[i]);
+		req.vnic_id = rte_cpu_to_le_16(vnic->fw_vnic_id);
+
+		rc = bnxt_hwrm_send_message(bp, &req, sizeof(req), BNXT_USE_CHIMP_MB);
+
+		HWRM_CHECK_RESULT();
+		HWRM_UNLOCK();
+	}
+
+	return rc;
+}
diff --git a/drivers/net/bnxt/bnxt_hwrm.h b/drivers/net/bnxt/bnxt_hwrm.h
index 815e61d..bb1762d 100644
--- a/drivers/net/bnxt/bnxt_hwrm.h
+++ b/drivers/net/bnxt/bnxt_hwrm.h
@@ -229,4 +229,5 @@ int bnxt_hwrm_port_phy_qcaps(struct bnxt *bp);
 int bnxt_hwrm_rx_ring_reset(struct bnxt *bp, int queue_index);
 int bnxt_hwrm_ring_stats(struct bnxt *bp, uint32_t cid, int idx,
 			 struct bnxt_ring_stats *stats, bool rx);
+int bnxt_vnic_rss_clear_p5(struct bnxt *bp, struct bnxt_vnic_info *vnic);
 #endif
diff --git a/drivers/net/bnxt/bnxt_rxq.c b/drivers/net/bnxt/bnxt_rxq.c
index 5fd83c0..b0ab3df 100644
--- a/drivers/net/bnxt/bnxt_rxq.c
+++ b/drivers/net/bnxt/bnxt_rxq.c
@@ -538,6 +538,9 @@ int bnxt_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 		if (active_queue_cnt == 0) {
 			uint16_t saved_mru = vnic->mru;
 
+			/* clear RSS setting on vnic. */
+			bnxt_vnic_rss_clear_p5(bp, vnic);
+
 			vnic->mru = 0;
 			/* Reconfigure default receive ring and MRU. */
 			bnxt_hwrm_vnic_cfg(bp, vnic);
-- 
2.10.1