[dpdk-dev] [PATCH 1/8] net/qede: fix to disable per-VF Tx switching feature

[Rasesh Mody <rasesh.mody@cavium.com>]

From: Harish Patil <harish.patil@cavium.com>

Provide a knob to control per-VF Tx switching feature by adding a config
option, CONFIG_RTE_LIBRTE_QEDE_VF_TX_SWITCH. By default, it will be kept
in disabled state for better performance with small sized frames.

Fixes: 2ea6f76aff40 ("qede: add core driver")
Cc: stable@dpdk.org

Signed-off-by: Harish Patil <harish.patil@cavium.com>
---
 config/common_base             |    1 +
 drivers/net/qede/qede_ethdev.c |    9 ++++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/config/common_base b/config/common_base
index 82ee754..a22d0b1 100644
--- a/config/common_base
+++ b/config/common_base
@@ -410,6 +410,7 @@ CONFIG_RTE_LIBRTE_QEDE_DEBUG_INFO=n
 CONFIG_RTE_LIBRTE_QEDE_DEBUG_DRIVER=n
 CONFIG_RTE_LIBRTE_QEDE_DEBUG_TX=n
 CONFIG_RTE_LIBRTE_QEDE_DEBUG_RX=n
+CONFIG_RTE_LIBRTE_QEDE_VF_TX_SWITCH=n
 #Provides abs path/name of the firmware file.
 #Empty string denotes driver will use default firmware
 CONFIG_RTE_LIBRTE_QEDE_FW=""
diff --git a/drivers/net/qede/qede_ethdev.c b/drivers/net/qede/qede_ethdev.c
index 661d938..c228b06 100644
--- a/drivers/net/qede/qede_ethdev.c
+++ b/drivers/net/qede/qede_ethdev.c
@@ -453,6 +453,12 @@ int qede_activate_vport(struct rte_eth_dev *eth_dev, bool flg)
 	params.update_vport_active_tx_flg = 1;
 	params.vport_active_rx_flg = flg;
 	params.vport_active_tx_flg = flg;
+#ifndef RTE_LIBRTE_QEDE_VF_TX_SWITCH
+	if (IS_VF(edev)) {
+		params.update_tx_switching_flg = 1;
+		params.tx_switching_flg = !flg;
+	}
+#endif
 	for_each_hwfn(edev, i) {
 		p_hwfn = &edev->hwfns[i];
 		params.opaque_fid = p_hwfn->hw_info.opaque_fid;
@@ -463,7 +469,8 @@ int qede_activate_vport(struct rte_eth_dev *eth_dev, bool flg)
 			break;
 		}
 	}
-	DP_INFO(edev, "vport %s\n", flg ? "activated" : "deactivated");
+	DP_INFO(edev, "vport %s VF tx-switch %s\n", flg ? "activated" : "deactivated",
+			params.tx_switching_flg ? "enabled" : "disabled");
 	return rc;
 }
 
-- 
1.7.10.3