From: Ajit Khaparde <ajit.khaparde@broadcom.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>
Cc: Mike Baucom <michael.baucom@broadcom.com>, dpdk-dev <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH] net/bnxt: allow the mark to use a cfa code of zero
Date: Wed, 27 May 2020 13:28:44 -0700 [thread overview]
Message-ID: <CACZ4nhsq=E8UT1Kiy8z3qXGSDWfx9hXm=CB3E=dg-P3xGG9T+Q@mail.gmail.com> (raw)
In-Reply-To: <a3d4453a-0ddb-b480-4c2a-c1bd20a40452@intel.com>
On Wed, May 27, 2020 at 8:47 AM Ferruh Yigit <ferruh.yigit@intel.com> wrote:
> On 5/23/2020 12:55 AM, Mike Baucom wrote:
> > The mark code was too restrictive by disallowing a cfa_code of zero.
> > This code loosens the requirement and allows zero.
>
> I can see "if (cfa_code)" check removed, but can you please give some
> details
> that what it the impact of having that check and why change has been done.
>
> Also it is not clear what "cfa code" is, if it has a significance can you
> please
> describe it as well.
>
In the ingress path, the cfa_code field in Rx completion identifies the
CFA action rule that was used for the incoming packet. It is possible
that the packet could hit the rule at index 0 in the table.
The mark action code was too restrictive by disallowing a cfa_code of zero.
This code in the patch loosens the requirement and allows zero.
I will update the commit log with the same verbiage.
Thanks
Ajit
>
> >
> > Fixes: b87abb2e55cb ("net/bnxt: support marking packet")
> >
> > Signed-off-by: Mike Baucom <michael.baucom@broadcom.com>
> > Reviewed-by: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
> > ---
> > drivers/net/bnxt/bnxt_rxr.c | 20 +++++++++-----------
> > 1 file changed, 9 insertions(+), 11 deletions(-)
> >
> > diff --git a/drivers/net/bnxt/bnxt_rxr.c b/drivers/net/bnxt/bnxt_rxr.c
> > index ee1acb1..91ff729 100644
> > --- a/drivers/net/bnxt/bnxt_rxr.c
> > +++ b/drivers/net/bnxt/bnxt_rxr.c
> > @@ -465,17 +465,15 @@ static inline struct rte_mbuf *bnxt_tpa_end(
> > break;
> > }
> >
> > - if (cfa_code) {
> > - rc = ulp_mark_db_mark_get(bp->ulp_ctx, gfid,
> > - cfa_code, &mark_id);
> > - if (!rc) {
> > - /* Got the mark, write it to the mbuf and return */
> > - mbuf->hash.fdir.hi = mark_id;
> > - mbuf->udata64 = (cfa_code & 0xffffffffull) << 32;
> > - mbuf->hash.fdir.id = rxcmp1->cfa_code;
> > - mbuf->ol_flags |= PKT_RX_FDIR | PKT_RX_FDIR_ID;
> > - return;
> > - }
> > + rc = ulp_mark_db_mark_get(bp->ulp_ctx, gfid,
> > + cfa_code, &mark_id);
> > + if (!rc) {
> > + /* Got the mark, write it to the mbuf and return */
> > + mbuf->hash.fdir.hi = mark_id;
> > + mbuf->udata64 = (cfa_code & 0xffffffffull) << 32;
> > + mbuf->hash.fdir.id = rxcmp1->cfa_code;
> > + mbuf->ol_flags |= PKT_RX_FDIR | PKT_RX_FDIR_ID;
> > + return;
> > }
> >
> > skip_mark:
> >
>
>
prev parent reply other threads:[~2020-05-27 20:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-22 23:55 Mike Baucom
2020-05-23 3:52 ` Ajit Khaparde
2020-05-27 15:46 ` Ferruh Yigit
2020-05-27 20:28 ` Ajit Khaparde [this message]
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