[PATCH v3] net/i40e: fix max frame size config at port level

[Zhang, Yuying]

Hi Wenxuan,
LGTM.

> -----Original Message-----
> From: Wu, WenxuanX <wenxuanx.wu at intel.com>
> Sent: Wednesday, May 18, 2022 3:32 PM
> To: Zhang, Yuying <yuying.zhang at intel.com>; Xing, Beilei
> <beilei.xing at intel.com>; dev at dpdk.org
> Cc: Zhou, YidingX <yidingx.zhou at intel.com>; stable at dpdk.org
> Subject: RE: [PATCH v3] net/i40e: fix max frame size config at port level
> 
> Hi, Yuying
> 
> > -----Original Message-----
> > From: Zhang, Yuying <yuying.zhang at intel.com>
> > Sent: 2022年5月17日 22:40
> > To: Wu, WenxuanX <wenxuanx.wu at intel.com>; Xing, Beilei
> > <beilei.xing at intel.com>; dev at dpdk.org
> > Cc: Zhou, YidingX <yidingx.zhou at intel.com>; stable at dpdk.org
> > Subject: RE: [PATCH v3] net/i40e: fix max frame size config at port
> > level
> >
> > Hi Wenxuan,
> >
> > > -----Original Message-----
> > > From: Wu, WenxuanX <wenxuanx.wu at intel.com>
> > > Sent: Friday, May 13, 2022 3:21 PM
> > > To: Xing, Beilei <beilei.xing at intel.com>; Zhang, Yuying
> > > <yuying.zhang at intel.com>; dev at dpdk.org
> > > Cc: Wu, WenxuanX <wenxuanx.wu at intel.com>; Zhou, YidingX
> > > <yidingx.zhou at intel.com>; stable at dpdk.org
> > > Subject: [PATCH v3] net/i40e: fix max frame size config at port
> > > level
> > >
> > > From: Wenxuan Wu <wenxuanx.wu at intel.com>
> > >
> > > Previously, max frame size can only be set when link is up, and the
> > > wait time is 1 sec. Startup time of 10G_BASET longer than 1s would
> > > result in
> > failure.
> > >
> > > Acctually, max frame size of media type I40E_MEDIA_TYPE_BASET can be
> > > set regardless of link status.
> > >
> > > This patch omitted the link status check of 10G_MEDIA_TYPE_BASET.
> > >
> > > Fixes: a4ba77367923 ("net/i40e: enable maximum frame size at port
> > > level")
> > > Cc: stable at dpdk.org
> > >
> > > Signed-off-by: Wenxuan Wu <wenxuanx.wu at intel.com>

Acked-by: Yuying Zhang <yuying.zhang at intel.com>

> > > ---
> > >  drivers/net/i40e/i40e_ethdev.c | 24 ++++++++++++++----------
> > >  1 file changed, 14 insertions(+), 10 deletions(-)
> > >
> > > diff --git a/drivers/net/i40e/i40e_ethdev.c
> > > b/drivers/net/i40e/i40e_ethdev.c index 755786dc10..12d3cd9b0c 100644
> > > --- a/drivers/net/i40e/i40e_ethdev.c
> > > +++ b/drivers/net/i40e/i40e_ethdev.c
> > > @@ -12102,17 +12102,21 @@ i40e_set_mac_max_frame(struct
> > rte_eth_dev
> > > *dev, uint16_t size)
> > >  	struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data-
> > > >dev_private);
> > >  	uint32_t rep_cnt = MAX_REPEAT_TIME;
> > >  	struct rte_eth_link link;
> > > -	enum i40e_status_code status;
> > > -
> > > -	do {
> > > -		update_link_reg(hw, &link);
> > > -		if (link.link_status)
> > > -			break;
> > > -
> > > -		rte_delay_ms(CHECK_INTERVAL);
> > > -	} while (--rep_cnt);
> > > +	enum i40e_status_code status =
> > I40E_ERR_DEVICE_NOT_SUPPORTED;
> >
> > There is no need to initialize status. You can reserve the original code.
> >
> Yeah, will fix in next version.
> > > +	bool can_be_set = true;
> > > +
> > > +	/* I40E_MEDIA_TYPE_BASET link up can be ignored */
> > > +	if (hw->phy.media_type != I40E_MEDIA_TYPE_BASET) {
> > > +		do {
> > > +			update_link_reg(hw, &link);
> > > +			if (link.link_status)
> > > +				break;
> > > +			rte_delay_ms(CHECK_INTERVAL);
> > > +		} while (--rep_cnt);
> > > +		can_be_set = link.link_status != 0;
> >
> > can_be_set = !(! link.link_status);
> Will fix  like this without parentheses in next version e.g.  !(! link.link_status) -
> > !!link.link_status
> >
> > > +	}
> > >
> > > -	if (link.link_status) {
> > > +	if (can_be_set) {
> > >  		status = i40e_aq_set_mac_config(hw, size, TRUE, 0, false,
> > NULL);
> > >  		if (status != I40E_SUCCESS)
> > >  			PMD_DRV_LOG(ERR, "Failed to set max frame size at
> > port level");
> > > --
> > > 2.25.1
> Thanks
> Wenxuan