Re: [PATCH 2/6] remoteproc: imx_rproc: use imx specific hook for find_loaded_rsc_table

[Iuliana Prodan <iuliana.prodan@nxp.com>]

On 7/12/2024 11:34 AM, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.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@nxp.com>

Reviewed-by: Iuliana Prodan <iuliana.prodan@nxp.com>

Thanks,
Iulia


> ---
>   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 3c8b64db8823..48c48b53a3aa 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -666,6 +666,17 @@ 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,
> @@ -676,7 +687,7 @@ 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,
>