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

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Date:   Wed, 21 Dec 2022 11:55:08 +0100
From:   Marco Felsch <m.felsch@...gutronix.de>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     bjorn.andersson@...aro.org, mathieu.poirier@...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

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?

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
> 
>