From: Somnath Kotur <somnath.kotur@broadcom.com>
Date: Sat, 21 Dec 2019 02:29:37 +0000 (-0800)
Subject: net/bnxt: fix Tx queue profile selection
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=816eacad1116b06581df3ca6b269990d24f63dac;p=dpdk.git

net/bnxt: fix Tx queue profile selection

In the case when CoS classification is disabled, driver was iterating
looking for only lossy profiles as that is what is expected to be used
for regular NIC operations. But in certain custom profiles, there were
no lossy profiles configured, only lossless profiles instead.
To handle such cases, it is better to fallback to using the first valid
profile.

Fixes: 698aa7e95325 ("net/bnxt: add code to determine the Tx COS queue")
Cc: stable@dpdk.org

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---

diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index d0dcd561c1..bee4c154fd 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -1210,6 +1210,35 @@ static int bnxt_hwrm_port_phy_qcfg(struct bnxt *bp,
 	return rc;
 }
 
+static bool bnxt_find_lossy_profile(struct bnxt *bp)
+{
+	int i = 0;
+
+	for (i = BNXT_COS_QUEUE_COUNT - 1; i >= 0; i--) {
+		if (bp->tx_cos_queue[i].profile ==
+		    HWRM_QUEUE_SERVICE_PROFILE_LOSSY) {
+			bp->tx_cosq_id[0] = bp->tx_cos_queue[i].id;
+			return true;
+		}
+	}
+	return false;
+}
+
+static void bnxt_find_first_valid_profile(struct bnxt *bp)
+{
+	int i = 0;
+
+	for (i = BNXT_COS_QUEUE_COUNT - 1; i >= 0; i--) {
+		if (bp->tx_cos_queue[i].profile !=
+		    HWRM_QUEUE_SERVICE_PROFILE_UNKNOWN &&
+		    bp->tx_cos_queue[i].id !=
+		    HWRM_QUEUE_SERVICE_PROFILE_UNKNOWN) {
+			bp->tx_cosq_id[0] = bp->tx_cos_queue[i].id;
+			break;
+		}
+	}
+}
+
 int bnxt_hwrm_queue_qportcfg(struct bnxt *bp)
 {
 	int rc = 0;
@@ -1269,14 +1298,13 @@ get_rx_info:
 						bp->tx_cos_queue[i].id;
 			}
 		} else {
-			for (i = BNXT_COS_QUEUE_COUNT - 1; i >= 0; i--) {
-				if (bp->tx_cos_queue[i].profile ==
-					HWRM_QUEUE_SERVICE_PROFILE_LOSSY) {
-					bp->tx_cosq_id[0] =
-						bp->tx_cos_queue[i].id;
-					break;
-				}
-			}
+			/* When CoS classification is disabled, for normal NIC
+			 * operations, ideally we should look to use LOSSY.
+			 * If not found, fallback to the first valid profile
+			 */
+			if (!bnxt_find_lossy_profile(bp))
+				bnxt_find_first_valid_profile(bp);
+
 		}
 	}
 
diff --git a/drivers/net/bnxt/bnxt_hwrm.h b/drivers/net/bnxt/bnxt_hwrm.h
index abe5de9db6..d8d1360f91 100644
--- a/drivers/net/bnxt/bnxt_hwrm.h
+++ b/drivers/net/bnxt/bnxt_hwrm.h
@@ -35,6 +35,9 @@ struct bnxt_cp_ring_info;
 #define HWRM_QUEUE_SERVICE_PROFILE_LOSSY \
 	HWRM_QUEUE_QPORTCFG_OUTPUT_QUEUE_ID0_SERVICE_PROFILE_LOSSY
 
+#define HWRM_QUEUE_SERVICE_PROFILE_UNKNOWN \
+	HWRM_QUEUE_QPORTCFG_OUTPUT_QUEUE_ID0_SERVICE_PROFILE_UNKNOWN
+
 #define HWRM_FUNC_RESOURCE_QCAPS_OUTPUT_VF_RESV_STRATEGY_MINIMAL_STATIC \
 	HWRM_FUNC_RESOURCE_QCAPS_OUTPUT_VF_RESERVATION_STRATEGY_MINIMAL_STATIC
 #define HWRM_FUNC_RESOURCE_QCAPS_OUTPUT_VF_RESV_STRATEGY_MAXIMAL \