From: Sudarsana Reddy Kalluru <sudarsana.kalluru@cavium.com>
Date: Wed, 19 Sep 2018 21:59:11 -0700
Subject: qed: Do not add VLAN 0 tag to untagged frames in multi-function mode.
Patch-mainline: v4.19-rc6
Git-commit: 0216da9413afa546627a1b0d319dfd17fef34050
References: bsc#1050536 FATE#322898
In certain multi-function switch dependent modes, firmware adds vlan tag 0
to the untagged frames. This leads to double tagging for the traffic
if the dcbx is enabled, which is not the desired behavior. To avoid this,
driver needs to set "dcb_dont_add_vlan0" flag.
Fixes: cac6f691 ("qed: Add support for Unified Fabric Port")
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/qlogic/qed/qed_dcbx.c | 9 ++++++++-
drivers/net/ethernet/qlogic/qed/qed_dcbx.h | 1 +
2 files changed, 9 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
@@ -190,6 +190,7 @@ qed_dcbx_dp_protocol(struct qed_hwfn *p_
static void
qed_dcbx_set_params(struct qed_dcbx_results *p_data,
+ struct qed_hwfn *p_hwfn,
struct qed_hw_info *p_info,
bool enable,
u8 prio,
@@ -206,6 +207,11 @@ qed_dcbx_set_params(struct qed_dcbx_resu
else
p_data->arr[type].update = DONT_UPDATE_DCB_DSCP;
+ /* Do not add vlan tag 0 when DCB is enabled and port in UFP/OV mode */
+ if ((test_bit(QED_MF_8021Q_TAGGING, &p_hwfn->cdev->mf_bits) ||
+ test_bit(QED_MF_8021AD_TAGGING, &p_hwfn->cdev->mf_bits)))
+ p_data->arr[type].dont_add_vlan0 = true;
+
/* QM reconf data */
if (p_info->personality == personality)
qed_hw_info_set_offload_tc(p_info, tc);
@@ -231,7 +237,7 @@ qed_dcbx_update_app_info(struct qed_dcbx
personality = qed_dcbx_app_update[i].personality;
- qed_dcbx_set_params(p_data, p_info, enable,
+ qed_dcbx_set_params(p_data, p_hwfn, p_info, enable,
prio, tc, type, personality);
}
}
@@ -954,6 +960,7 @@ static void qed_dcbx_update_protocol_dat
p_data->dcb_enable_flag = p_src->arr[type].enable;
p_data->dcb_priority = p_src->arr[type].priority;
p_data->dcb_tc = p_src->arr[type].tc;
+ p_data->dcb_dont_add_vlan0 = p_src->arr[type].dont_add_vlan0;
}
/* Set pf update ramrod command params */
--- a/drivers/net/ethernet/qlogic/qed/qed_dcbx.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_dcbx.h
@@ -55,6 +55,7 @@ struct qed_dcbx_app_data {
u8 update; /* Update indication */
u8 priority; /* Priority */
u8 tc; /* Traffic Class */
+ bool dont_add_vlan0; /* Do not insert a vlan tag with id 0 */
};
#define QED_DCBX_VERSION_DISABLED 0