RE: [PATCH v4 1/2] app/testpmd: fix vlan offload of rxq

["Ye, MingjinX" <mingjinx.ye@intel.com>]

> -----Original Message-----
> From: lihuisong (C) <lihuisong@huawei.com>
> Sent: 2022年10月28日 10:09
> To: Ye, MingjinX <mingjinx.ye@intel.com>; dev@dpdk.org
> Cc: stable@dpdk.org; Zhou, YidingX <yidingx.zhou@intel.com>; Singh, Aman
> Deep <aman.deep.singh@intel.com>; Zhang, Yuying
> <yuying.zhang@intel.com>
> Subject: Re: [PATCH v4 1/2] app/testpmd: fix vlan offload of rxq
> 
> 
> 在 2022/10/27 19:02, Ye, MingjinX 写道:
> > Hi lihuisong,
> >
> > This means that queue offloads need to update by recalling
> > dev_configure and setup target queues.
> Why not update queue offloads in PMD?
> > Can you tell me, where is the limitation?
> According to other Rx/Tx offload configurations, this may not be a limitation.
> But it seems to create a dependency on user usage.
> 
> Port VLAN releated offloads are set by ethdev ops. There is no requirement
> in ehedev layer that this port needs to stopped when set these offloads.
> Now it depends on user does recall dev_configure and setup queues to
> update queue offloads because of setting these offloads.
> >
> > Thanks,
> > Mingjin
> >
> >> -----Original Message-----
> >> From: lihuisong (C) <lihuisong@huawei.com>
> >> Sent: 2022年10月26日 17:53
> >> To: Ye, MingjinX <mingjinx.ye@intel.com>; dev@dpdk.org
> >> Cc: stable@dpdk.org; Zhou, YidingX <yidingx.zhou@intel.com>; Singh,
> >> Aman Deep <aman.deep.singh@intel.com>; Zhang, Yuying
> >> <yuying.zhang@intel.com>
> >> Subject: Re: [PATCH v4 1/2] app/testpmd: fix vlan offload of rxq
> >>
> >>
> >> 在 2022/10/27 1:10, Mingjin Ye 写道:
> >>> After setting vlan offload in testpmd, the result is not updated to
> >>> rxq. Therefore, the queue needs to be reconfigured after executing
> >>> the "vlan offload" related commands.
> >>>
> >>> Fixes: a47aa8b97afe ("app/testpmd: add vlan offload support")
> >>> Cc: stable@dpdk.org
> >>>
> >>> Signed-off-by: Mingjin Ye <mingjinx.ye@intel.com>
> >>> ---
> >>>    app/test-pmd/cmdline.c | 1 +
> >>>    1 file changed, 1 insertion(+)
> >>>
> >>> diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c index
> >>> 17be2de402..ce125f549f 100644
> >>> --- a/app/test-pmd/cmdline.c
> >>> +++ b/app/test-pmd/cmdline.c
> >>> @@ -4133,6 +4133,7 @@ cmd_vlan_offload_parsed(void *parsed_result,
> >>>    	else
> >>>    		vlan_extend_set(port_id, on);
> >>>
> >>> +	cmd_reconfig_device_queue(port_id, 1, 1);
> In addition, I have some comments:
> 1) Normally, the parsed function of testpmd command needed to re-config
> port and queue needs to check if port status is STOPED. Why don't you add
> this check?
The check is exist.
> If the check is not exist, queue offloads are not updated until the next port
> stop/start command is executed. Right?
yes
> 
> 2) Why is the queue-based VLAN offload API not used?
VLAN offload is a port-related configuration. If a single port is changed,
the associated queue needs to be all updated in configuration. Therefore, 
there will be no additional api to configure.
>     Like, rte_eth_dev_set_vlan_strip_on_queue. It seems that this kind of API
> is
>     dedicated to do this.
> >> This means that queue offloads need to upadte by re-calling
> >> dev_configure and setup all queues, right?
> >> If it is, this adds a usage limitation.
> >>>    	return;
> >>>    }
> >>>