Please help to see this DPDK problem//Reply: DPDK 20.11 - i40evf: No response for 14

[liaobiting <liaobiting@huawei.com>]

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BUG: DPDK-20.11- i40evf: No response for 14

Hi:
I am using Intel SR-IOV XL710 VF with DPDK v20.11 to create a dpdkbond but failed.
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         As the picture shows, when dpdk bond start and slave link up, it triggers lsc callback function which registers in the eal thread, and then in the activate_slave process,
i40evf send msg 14 to pf to config promisc, but there is no response received. Because function "i40evf_handle_aq_msg" in which vf receives response from pf
is in the same thread of eal with function "_i40evf_execute_vf_cmd" in which vf sends msg to pf. Thus, when eal thread goes in function _i40evf_execute_vf_cmd,
it can't handle msg from pf at the same time, then it will report "No response for 14" in dpdk log.

And there are the error logs in dpdk:
2021-10-11T11:03:32.812516+08:00|info|ovs-vswitchd[1721043]|EAL: [eth_dev_ops] Slave 1: set mtu: 9058 .
2021-10-11T11:03:32.822434+08:00|info|ovs-vswitchd[1721043]|EAL: [eth_dev_ops] Slave 1: dev configure succeed.
2021-10-11T11:03:33.022426+08:00|info|ovs-vswitchd[1721043]|EAL: LSC CALLBACK: slave 0000:87:02.0 links up
2021-10-11T11:03:33.022455+08:00|info|ovs-vswitchd[1721043]|PMD: Slave 1: lacp_rate has been set to slow.
2021-10-11T11:03:35.034445+08:00|warning|ovs-vswitchd[1721043]|_i40evf_execute_vf_cmd(): No response for 14
2021-10-11T11:03:35.034628+08:00|err|ovs-vswitchd[1721043]|i40evf_config_promisc(): fail to execute command CONFIG_PROMISCUOUS_MODE
2021-10-11T11:03:35.034657+08:00|info|ovs-vswitchd[1721043]|EAL: [eth_dev_ops] Slave 1: enable allmulticast.
2021-10-11T11:03:35.034680+08:00|err|ovs-vswitchd[1721043]|bond_mode_8023ad_register_lacp_mac(1250) - failed to enable allmulti mode for port 1: Resource temporarily unavailable
2021-10-11T11:03:35.034702+08:00|debug|ovs-vswitchd[1721043]|bond_mode_8023ad_register_lacp_mac(1266) - forced promiscuous for port 1
2021-10-11T11:03:35.034725+08:00|info|ovs-vswitchd[1721043]|EAL: [eth_dev_ops] Slave 1 (net_bonding_trunk1): Configuring and applying resources successed.
2021-10-11T11:03:35.034746+08:00|info|ovs-vswitchd[1721043]|EAL: [eth_dev_ops] slave 1 (net_bonding_trunk1) activate.
2021-10-11T11:03:35.034771+08:00|debug|ovs-vswitchd[1721043]|     0 [Port 1: rx_machine] -> INITIALIZE
2021-10-11T11:03:35.034794+08:00|debug|ovs-vswitchd[1721043]|     0 [Port 1: mux_machine] -> DETACHED
2021-10-11T11:03:35.084534+08:00|err|ovs-vswitchd[1721043]|i40evf_handle_aq_msg(): command mismatch,expect 8, get 14
2021-10-11T11:03:35.134545+08:00|debug|ovs-vswitchd[1721043]|   100 [Port 1: mux_machine] DETACHED -> WAITING
2021-10-11T11:03:35.544648+08:00|info|ovs-vswitchd[1721043]|EAL: [eth_dev_ops] Slave 1: start dev.

How can I solve this problem ?
Thakns for help.
Regards,
Liao

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