linux-kernel - Re: [PATCH V4 0/2] remoteproc: support self recovery

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Date:   Wed, 27 Apr 2022 08:36:01 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Peng Fan <peng.fan@....com>
Cc:     "Peng Fan (OSS)" <peng.fan@....nxp.com>,
        "bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
        "arnaud.pouliquen@...s.st.com" <arnaud.pouliquen@...s.st.com>,
        "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V4 0/2] remoteproc: support self recovery

On Wed, 27 Apr 2022 at 02:37, Peng Fan <peng.fan@....com> wrote:
>
> Mathieu, Bjorn
>
> > Subject: RE: [PATCH V4 0/2] remoteproc: support self recovery
>
> Do you have time to give a look? i.MX8QM/QXP remoteproc
> support depends on this feature.

As I have stated before, this feature changes the heart of the
remoteproc core state machine and I want to make sure we get it right.
That in turn will require time that is currently spent reviewing other
patchset on the mailing list.  I suggest you start reviewing patches
if you want things to go faster.  That will help with the backlog,
which will allow me to look at more complex work such as yours.

>
> Thanks,
> Peng.
>
> >
> > > Subject: [PATCH V4 0/2] remoteproc: support self recovery
> >
> > Gentle ping..
> >
> > Thanks
> > Peng.
> >
> > >
> > > From: Peng Fan <peng.fan@....com>
> > >
> > > V4:
> > >   Based on Bjorn's comments on V2-2
> > >   Move the rproc_has_feature/rproc_set_feature to
> > > remoteproc_internal.h and  Keep rproc_features still in remoteproc.h,
> > > because we use RPROC_MAX_FEATURES to declare bitmap.
> > >   Update commit log for patch 2/2, and add comments
> > >
> > > V3:
> > >  Resend the wrong labeled patchset
> > >
> > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatc
> > > hwork.kernel.org%2Fproject%2Flinux-
> > remoteproc%2Flist%2F%3Fseries%3D621
> > >
> > 311&amp;data=04%7C01%7Cpeng.fan%40nxp.com%7C79b37b5586cc4c913129
> > 08da1b
> > >
> > 7ad5a8%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637852511630
> > 263603
> > > %7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLC
> > JBTiI6I
> > >
> > k1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=5dxwnc716qj%2FQc6TzayLIn
> > %2BiMJ8
> > > oSwksVUIfmw6atVk%3D&amp;reserved=0
> > >
> > >  Write a cover-letter
> > >  To i.MX8QM/QXP, they have a M4 core self-recovery capability without
> > > Linux loading firmware. The self recovery is done by  SCU(System
> > > Control Unit). Current remoteproc framework only support Linux  help
> > > recovery remote processor(stop, loading firmware, start). This
> > > patchset is support remote processor self recovery(attach recovery).
> > >
> > >  In order to avoid introducing a new variable(bool
> > > support_self_recovery), patch 1 introduce a new function,
> > > rproc_has_feature to make code easy to extend, cleaner, such as we
> > > could move "bool has_iommu" to rproc_has_feature(rproc,
> > RPROC_FEAT_IOMMU).
> > >
> > >  Patch 2 is introduce a new function rproc_attach_recovery for  self
> > > recovery, the original logic move to rproc_firmware_recovery meaning
> > > needs linux to help recovery.
> > >
> > >  V2-version 2:
> > >
> > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatc
> > > hwork.kernel.org%2Fproject%2Flinux-
> > remoteproc%2Flist%2F%3Fseries%3D621
> > >
> > 311&amp;data=04%7C01%7Cpeng.fan%40nxp.com%7C79b37b5586cc4c913129
> > 08da1b
> > >
> > 7ad5a8%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637852511630
> > 263603
> > > %7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLC
> > JBTiI6I
> > >
> > k1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=5dxwnc716qj%2FQc6TzayLIn
> > %2BiMJ8
> > > oSwksVUIfmw6atVk%3D&amp;reserved=0
> > >  Introduce rproc_has_feature
> > >
> > >  V2-version 1:
> > >
> > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatc
> > > hwork.kernel.org%2Fproject%2Flinux-
> > remoteproc%2Fpatch%2F20220126085&am
> > >
> > p;data=04%7C01%7Cpeng.fan%40nxp.com%7C79b37b5586cc4c91312908da1b7
> > ad5a8
> > > %7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C6378525116302636
> > 03%7CUnk
> > >
> > nown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1h
> > aWw
> > >
> > iLCJXVCI6Mn0%3D%7C3000&amp;sdata=eMRjdCSvLJrnvtS9QGUQYnr%2BtUPJkS
> > RSryJ
> > > p6%2BvvfNo%3D&amp;reserved=0
> > > 120.3397450-1-peng.fan@....nxp.com/
> > >  Nothing change in V2.
> > >  Only move this patch out from
> > >
> > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatc
> > > hwork.kernel.org%2Fproject%2Flinux-
> > remoteproc%2Flist%2F%3Fseries%3D604
> > >
> > 364&amp;data=04%7C01%7Cpeng.fan%40nxp.com%7C79b37b5586cc4c913129
> > 08da1b
> > >
> > 7ad5a8%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637852511630
> > 263603
> > > %7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLC
> > JBTiI6I
> > >
> > k1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=eJSTzHgK7eMYgLoENZ1dfZds
> > uj9O6kj
> > > aPyBm61WDXpM%3D&amp;reserved=0
> > >
> > >
> > >
> > > Peng Fan (2):
> > >   remoteproc: introduce rproc features
> > >   remoteproc: support attach recovery after rproc crash
> > >
> > >  drivers/remoteproc/remoteproc_core.c     | 67
> > > +++++++++++++++++-------
> > >  drivers/remoteproc/remoteproc_internal.h | 10 ++++
> > >  include/linux/remoteproc.h               |  7 +++
> > >  3 files changed, 65 insertions(+), 19 deletions(-)
> > >
> > > --
> > > 2.25.1
>