RDMA/hns: Disable alw_lcl_lpbk of SSU

If we enabled alw_lcl_lpbk in promiscuous mode, packet whose source
and destination mac address is equal will be handled in both inner
loopback and outer loopback. This will halve performance of roce in
promiscuous mode.

Signed-off-by: Weihang Li <liweihang@hisilicon.com>
Link: https://lore.kernel.org/r/1565276034-97329-14-git-send-email-oulijun@huawei.com
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index a1f62e072753cda99af8548a4575b01c1e1e6395..a178d63f3ec86b91e9c0c572b326f5c65590e5db 100644 (file)
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -1308,7 +1308,7 @@ static int hns_roce_set_vf_switch_param(struct hns_roce_dev *hr_dev,
                cpu_to_le16(HNS_ROCE_CMD_FLAG_NO_INTR | HNS_ROCE_CMD_FLAG_IN);
        desc.flag &= cpu_to_le16(~HNS_ROCE_CMD_FLAG_WR);
        roce_set_bit(swt->cfg, VF_SWITCH_DATA_CFG_ALW_LPBK_S, 1);
-       roce_set_bit(swt->cfg, VF_SWITCH_DATA_CFG_ALW_LCL_LPBK_S, 1);
+       roce_set_bit(swt->cfg, VF_SWITCH_DATA_CFG_ALW_LCL_LPBK_S, 0);
        roce_set_bit(swt->cfg, VF_SWITCH_DATA_CFG_ALW_DST_OVRD_S, 1);
 
        return hns_roce_cmq_send(hr_dev, &desc, 1);