Re: [dpdk-dev] Issue with X550 link status

["Dey, Souvik" <sodey@rbbn.com>]

The X550 NIC is of the below device id.
[root@stdell10 ~]# lspci -nnn | grep -i ether
19:00.0 Ethernet controller [0200]: Intel Corporation Ethernet Controller 10G X550T [8086:1563] (rev 01)
19:00.1 Ethernet controller [0200]: Intel Corporation Ethernet Controller 10G X550T [8086:1563] (rev 01)
19:10.0 Ethernet controller [0200]: Intel Corporation X550 Virtual Function [8086:1565]
19:10.1 Ethernet controller [0200]: Intel Corporation X550 Virtual Function [8086:1565]
19:10.2 Ethernet controller [0200]: Intel Corporation X550 Virtual Function [8086:1565]
19:10.3 Ethernet controller [0200]: Intel Corporation X550 Virtual Function [8086:1565]

So the mac_type is ixgbe_mac_X550_vf  in the below case.

--
Regards,
Souvik

From: Dey, Souvik
Sent: Wednesday, March 4, 2020 1:17 PM
To: dev@dpdk.org
Cc: xiaolong.ye@intel.com; xiao.zhang@intel.com; users@dpdk.org
Subject: Issue with X550 link status

Hi All,
              After upgrading to DPDK 18.11.6 LTS release from 18.11.2 the link_update call for link status update is not working for  X550 NICs SR-IOV enabled. On debugging it looks like the change introduced as a part of this patch is causing the issue.

https://patches.dpdk.org/patch/62140/

@@ -4135,6 +4138,10 @@  ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
              return rte_eth_linkstatus_set(dev, &link);
       }

+       esdp_reg = IXGBE_READ_REG(hw, IXGBE_ESDP);
+       if ((esdp_reg & IXGBE_ESDP_SDP3))
+              link_up = 0;
+
       if (link_up == 0) {
              if (ixgbe_get_media_type(hw) == ixgbe_media_type_fiber) {
                      intr->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;


I can see that the esdp_req is coming as 3735928495(0xDEADBEAF) and due to which the link_up is set to 0 even when ixgbevf_check_link returned link_up as 1. Along with this patch I also see a path_fullchk patch introduced , does that play any role in this ?
Can someone please let me know if the patch has got some issues or it is behaving correctly and the link_status is failing for valid reason. As mentioned earlier the same HW with same NIC acting in SR-IOV works fine with 18.11.2 DPDK . I am blocked at a customer bug dew to this and any urgent help will be much appreciated.

--
Regards,
Souvik


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