linux-kernel - Re: [PATCH V2] remoteproc: imx_rproc: use imx specific hook for find_loaded_rsc

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Message-ID: <CANLsYky2L6p7uAPzc_X6ka464LSJFzhRzm+oi5XCkR78Rs0D6w@mail.gmail.com>
Date:   Mon, 2 Jan 2023 15:46:13 -0700
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Marco Felsch <m.felsch@...gutronix.de>
Cc:     "Peng Fan (OSS)" <peng.fan@....nxp.com>,
        bjorn.andersson@...aro.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, linux-remoteproc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH V2] remoteproc: imx_rproc: use imx specific hook for find_loaded_rsc_table

On Wed, 21 Dec 2022 at 03:55, Marco Felsch <m.felsch@...gutronix.de> wrote:
>
> Hi,
>
> On 22-01-11, Peng Fan (OSS) wrote:
> > From: Peng Fan <peng.fan@....com>
> >
> > If there is a resource table device tree node, use the address as
> > the resource table address, otherwise use the address(where
> > .resource_table section loaded) inside the Cortex-M elf file.
> >
> > And there is an update in NXP SDK that Resource Domain Control(RDC)
> > enabled to protect TCM, linux not able to write the TCM space when
> > updating resource table status and cause kernel dump. So use the address
> > from device tree could avoid kernel dump.
> >
> > Note: NXP M4 SDK not check resource table update, so it does not matter
> > use whether resource table address specified in elf file or in device
> > tree. But to reflect the fact that if people specific resource table
> > address in device tree, it means people are aware and going to use it,
> > not the address specified in elf file.
> >
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> >
> > V2:
> >  Update commit message
>
> What is the status of this patch?
>

That one has obviously slipped through the cracks...  It boggles my
mind that nobody, i.e Peng, has reminded me of it, which raises
obvious doubts about the real necessity of the patch.

Marco - do you need this patch and if so, are you in a position to
provide a Tested-by?

> Regards,
>   Marco
>
> >
> >  drivers/remoteproc/imx_rproc.c | 13 ++++++++++++-
> >  1 file changed, 12 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> > index 7a096f1891e6..0bd24c937a73 100644
> > --- a/drivers/remoteproc/imx_rproc.c
> > +++ b/drivers/remoteproc/imx_rproc.c
> > @@ -499,6 +499,17 @@ static struct resource_table *imx_rproc_get_loaded_rsc_table(struct rproc *rproc
> >       return (struct resource_table *)priv->rsc_table;
> >  }
> >
> > +static struct resource_table *
> > +imx_rproc_elf_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw)
> > +{
> > +     struct imx_rproc *priv = rproc->priv;
> > +
> > +     if (priv->rsc_table)
> > +             return (struct resource_table *)priv->rsc_table;
> > +
> > +     return rproc_elf_find_loaded_rsc_table(rproc, fw);
> > +}
> > +
> >  static const struct rproc_ops imx_rproc_ops = {
> >       .prepare        = imx_rproc_prepare,
> >       .attach         = imx_rproc_attach,
> > @@ -508,7 +519,7 @@ static const struct rproc_ops imx_rproc_ops = {
> >       .da_to_va       = imx_rproc_da_to_va,
> >       .load           = rproc_elf_load_segments,
> >       .parse_fw       = imx_rproc_parse_fw,
> > -     .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
> > +     .find_loaded_rsc_table = imx_rproc_elf_find_loaded_rsc_table,
> >       .get_loaded_rsc_table = imx_rproc_get_loaded_rsc_table,
> >       .sanity_check   = rproc_elf_sanity_check,
> >       .get_boot_addr  = rproc_elf_get_boot_addr,
> > --
> > 2.25.1
> >
> >