netdev - [PATCH net-next 3/6] enic: Check if hw supports multi wq with vxlan offload

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Date:   Thu,  1 Mar 2018 11:07:21 -0800
From:   Govindarajulu Varadarajan <gvaradar@...co.com>
To:     davem@...emloft.net, netdev@...r.kernel.org
Cc:     benve@...co.com, Govindarajulu Varadarajan <gvaradar@...co.com>
Subject: [PATCH net-next 3/6] enic: Check if hw supports multi wq with vxlan offload

Some adaptors do not support vxlan offload when multi wq is configured.

If hw supports multi wq, BIT(2) is set in a1.

Signed-off-by: Govindarajulu Varadarajan <gvaradar@...co.com>
---
 drivers/net/ethernet/cisco/enic/enic_main.c   | 5 +++++
 drivers/net/ethernet/cisco/enic/vnic_devcmd.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 848aac477cff..3280a05f9cf1 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -212,6 +212,11 @@ static void enic_udp_tunnel_add(struct net_device *netdev,
 
 		goto error;
 	}
+	if ((vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ) != 1) &&
+	    !(enic->vxlan.flags & ENIC_VXLAN_MULTI_WQ)) {
+		netdev_info(netdev, "vxlan: vxlan offload with multi wq not supported on this adapter");
+		goto error;
+	}
 
 	err = vnic_dev_overlay_offload_cfg(enic->vdev,
 					   OVERLAY_CFG_VXLAN_PORT_UPDATE,
diff --git a/drivers/net/ethernet/cisco/enic/vnic_devcmd.h b/drivers/net/ethernet/cisco/enic/vnic_devcmd.h
index 69529a3516cd..8fce9ef1c9bc 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_devcmd.h
+++ b/drivers/net/ethernet/cisco/enic/vnic_devcmd.h
@@ -699,6 +699,7 @@ enum overlay_ofld_cmd {
 
 #define ENIC_VXLAN_INNER_IPV6		BIT(0)
 #define ENIC_VXLAN_OUTER_IPV6		BIT(1)
+#define ENIC_VXLAN_MULTI_WQ		BIT(2)
 
 /* Use this enum to get the supported versions for each of these features
  * If you need to use the devcmd_get_supported_feature_version(), add
-- 
2.16.2