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From: "Zhang, Peng1X" <peng1x.zhang@intel.com>
To: "Zhang, Qi Z" <qi.z.zhang@intel.com>,
	"Yang, Qiming" <qiming.yang@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>
Cc: "stable@dpdk.org" <stable@dpdk.org>
Subject: RE: [PATCH v4] net/ice: retry sending adminQ command after failure
Date: Wed, 1 Jun 2022 02:46:15 +0000
Message-ID: <SJ0PR11MB51205B0DC892117AB0BA8DD1CEDF9@SJ0PR11MB5120.namprd11.prod.outlook.com> (raw)
In-Reply-To: <DM4PR11MB5994572CA2BADB79B3701F6ED7DF9@DM4PR11MB5994.namprd11.prod.outlook.com>

Because currently just focus on the following given situation, and use 'hw->dcf_enabled' it should only affect on DCF.
After having checked code 'ice_dcf_send_aq_cmd', it already have retry mechanism. 

> -----Original Message-----
> From: Zhang, Qi Z <qi.z.zhang@intel.com>
> Sent: Wednesday, June 1, 2022 9:54 AM
> To: Zhang, Peng1X <peng1x.zhang@intel.com>; Yang, Qiming
> <qiming.yang@intel.com>; dev@dpdk.org
> Cc: stable@dpdk.org
> Subject: RE: [PATCH v4] net/ice: retry sending adminQ command after failure
> 
> 
> 
> > -----Original Message-----
> > From: Zhang, Peng1X <peng1x.zhang@intel.com>
> > Sent: Wednesday, June 1, 2022 9:49 AM
> > To: Zhang, Qi Z <qi.z.zhang@intel.com>; Yang, Qiming
> > <qiming.yang@intel.com>; dev@dpdk.org
> > Cc: stable@dpdk.org
> > Subject: RE: [PATCH v4] net/ice: retry sending adminQ command after
> > failure
> >
> > I see, so ice_aq_retry_send_cmd  function will  conduct whether  DCF
> > is enabled or not with 'hw->dcf_enabled'.
> 
> Why not just enable retry in ice_dcf_send_aq_cmd?
> 
> 
> > > -----Original Message-----
> > > From: Zhang, Qi Z <qi.z.zhang@intel.com>
> > > Sent: Tuesday, May 31, 2022 7:52 PM
> > > To: Zhang, Peng1X <peng1x.zhang@intel.com>; Yang, Qiming
> > > <qiming.yang@intel.com>; dev@dpdk.org
> > > Cc: stable@dpdk.org
> > > Subject: RE: [PATCH v4] net/ice: retry sending adminQ command after
> > > failure
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: Zhang, Peng1X <peng1x.zhang@intel.com>
> > > > Sent: Wednesday, June 1, 2022 1:48 AM
> > > > To: Yang, Qiming <qiming.yang@intel.com>; Zhang, Qi Z
> > > > <qi.z.zhang@intel.com>; dev@dpdk.org
> > > > Cc: Zhang, Peng1X <peng1x.zhang@intel.com>; stable@dpdk.org
> > > > Subject: [PATCH v4] net/ice: retry sending adminQ command after
> > > > failure
> > > >
> > > > From: Peng Zhang <peng1x.zhang@intel.com>
> > > >
> > > > The origin design is if error happen during the step 3 of
> > > > following given situation, it will return error directly without
> > > > retry. While in current patch, it will retry again and again during certain
> time.
> > > > If retry succeed, rule can be continuously created. It will
> > > > improve success rate of creating rule under following given situation.
> > > >
> > > > The given situation as following steps show:
> > > > step 1. Kernel PF and DCF are ready at the beginning.
> > > > step 2. A VF reset happen, kernel send an event to DPDK DCF and
> > > > set STATE to pause.
> > > > step 3. Before DPDK DCF receive the event, it is possible a rule
> > > > creation is ongoing and switch rules, recipe, or vsi list related
> > > > adminQ operation is executing.
> > > > step 4. Then result of operation is failure, it will lead to error
> > > > return to DPDK DCF. DPDK DCF error code will be set as EINVAL, not
> > EAGAIN.
> > > >
> > > > Fixes: 6bad5047be24 ("net/ice/base: return correct error code")
> > > > Fixes: 453d087ccaff ("net/ice/base: add common functions")
> > > > Cc: stable@dpdk.org
> > > >
> > > > Signed-off-by: Peng Zhang <peng1x.zhang@intel.com>
> > > > ---
> > > >  v4 changes:
> > > >  - Add retry mechanism if fail to send adminQ command under given
> > > situation.
> > > >  v3 Changes:
> > > >  - Add the situation description, expected error code and
> > > > incorrect error code
> > > >  - in commit log.
> > > >  v2 Changes:
> > > >  - Modify DCF state checking mechanism.
> > > >
> > > >  drivers/net/ice/base/ice_common.c |  2 +-
> > > > drivers/net/ice/base/ice_switch.c |
> > > > 46 +++++++++++++++++++++++++++----
> > > > drivers/net/ice/base/ice_switch.h
> > > > |  5
> > > > ++++
> > > >  3 files changed, 46 insertions(+), 7 deletions(-)
> > > >
> > > > diff --git a/drivers/net/ice/base/ice_common.c
> > > > b/drivers/net/ice/base/ice_common.c
> > > > index db87bacd97..013c255371 100644
> > > > --- a/drivers/net/ice/base/ice_common.c
> > > > +++ b/drivers/net/ice/base/ice_common.c
> > > > @@ -2127,7 +2127,7 @@ ice_aq_alloc_free_res(struct ice_hw *hw, u16
> > > > num_entries,
> > > >
> > > >  	cmd->num_entries = CPU_TO_LE16(num_entries);
> > > >
> > > > -	return ice_aq_send_cmd(hw, &desc, buf, buf_size, cd);
> > > > +	return ice_aq_retry_send_cmd(hw, &desc, buf, buf_size, cd);
> > >
> > > this is the fix only for DCF, we don't need to retry in a PF driver context.
> > > Better keep the same function name, but implements the retry
> > > mechanism inside the function, and should only be triggered  when it
> > > is in a DCF context


  reply	other threads:[~2022-06-01  2:46 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-11 15:49 [PATCH v2] net/ice: fix DCF state checking mechanism peng1x.zhang
2022-05-13  9:56 ` Connolly, Padraig J
2022-05-17  7:35 ` Zhang, Qi Z
2022-05-18  6:36   ` Zhang, Peng1X
2022-05-18  6:45     ` Zhang, Qi Z
2022-05-19  6:05       ` Zhang, Peng1X
2022-05-20 18:31 ` [PATCH v3] " peng1x.zhang
2022-05-21  2:17   ` Zhang, Qi Z
2022-05-31 17:48   ` [PATCH v4] net/ice: retry sending adminQ command after failure peng1x.zhang
2022-05-31 11:51     ` Zhang, Qi Z
2022-06-01  1:48       ` Zhang, Peng1X
2022-06-01  1:53         ` Zhang, Qi Z
2022-06-01  2:46           ` Zhang, Peng1X [this message]
2022-06-01  3:22             ` Zhang, Qi Z
2022-06-01  5:35               ` Zhang, Peng1X
2022-06-08 10:21     ` [PATCH v5] net/ice: add retry mechanism for DCF " peng1x.zhang

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