Re: [dpdk-dev] [PATCH v2] fm10k: fix wrong VLAN value in RX mbuf

["He, Shaopeng" <shaopeng.he@intel.com>]

Hi, Mark

> -----Original Message-----
> From: Chen, Jing D
> Sent: Friday, November 20, 2015 6:35 PM
> To: He, Shaopeng; dev@dpdk.org
> Cc: Qiu, Michael
> Subject: RE: [PATCH v2] fm10k: fix wrong VLAN value in RX mbuf
> 
> > Signed-off-by: Shaopeng He <shaopeng.he@intel.com>
> > ---
> > ChangeLog:
> >
> > v2:
> > * change flag PKT_RX_VLAN_PKT to always set
> > * preserve the priority bits in vlan_tci
> >
> >  drivers/net/fm10k/fm10k_rxtx.c | 14 ++++++++++++--
> >  1 file changed, 12 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/fm10k/fm10k_rxtx.c
> > b/drivers/net/fm10k/fm10k_rxtx.c index 1bac28d..764f4f4 100644
> > --- a/drivers/net/fm10k/fm10k_rxtx.c
> > +++ b/drivers/net/fm10k/fm10k_rxtx.c
> > @@ -104,8 +104,14 @@ rx_desc_to_ol_flags(struct rte_mbuf *m, const
> > union fm10k_rx_desc *d)
> >  		(FM10K_RXD_STATUS_L4CS | FM10K_RXD_STATUS_L4E)))
> >  		m->ol_flags |= PKT_RX_L4_CKSUM_BAD;
> >
> > -	if (d->d.staterr & FM10K_RXD_STATUS_VEXT)
> > -		m->ol_flags |= PKT_RX_VLAN_PKT;
> > +	/**
> > +	 * fm10k's Ethernet switch core associates a VLAN ID and VLAN PRI
> 
> Change to Packets in fm10k device always carries a vlan tag?
> 
> > +	 * for each packet. For those packets coming in without a VLAN,
> > +	 * the port default VLAN ID will be used.
> > +	 * So in fm10k, always PKT_RX_VLAN_PKT flag is set and vlan_tci
> > +	 * is valid for each RX packet's mbuf.
> > +	 */
> > +	m->ol_flags |= PKT_RX_VLAN_PKT;
> 
> Since vlan_tci is always valid, is it better to move above line to below added
> lines?

Sure, I will send V3

Thanks,
--Shaopeng

> 
> >
> >  	if (unlikely(d->d.staterr & FM10K_RXD_STATUS_HBO))
> >  		m->ol_flags |= PKT_RX_HBUF_OVERFLOW; @@ -146,6
> +152,8 @@
> > fm10k_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,  #endif
> >
> >  		mbuf->hash.rss = desc.d.rss;
> > +		/* in fm10k, vlan_tci is always valid for RX packet */
> > +		mbuf->vlan_tci = desc.w.vlan;
> >
> >  		rx_pkts[count] = mbuf;
> >  		if (++next_dd == q->nb_desc) {
> > @@ -292,6 +300,8 @@ fm10k_recv_scattered_pkts(void *rx_queue, struct
> > rte_mbuf **rx_pkts,
> >  		rx_desc_to_ol_flags(first_seg, &desc);  #endif
> >  		first_seg->hash.rss = desc.d.rss;
> > +		/* in fm10k, vlan_tci is always valid for RX packet */
> > +		first_seg->vlan_tci = desc.w.vlan;
> >
> >  		/* Prefetch data of first segment, if configured to do so. */
> >  		rte_packet_prefetch((char *)first_seg->buf_addr +
> > --
> > 1.9.3
>