Re: [PATCH net-next v2 3/3] net: ipa: Grab IMEM slice base/size from DTS

[Simon Horman <horms@kernel.org>]

On Tue, May 27, 2025 at 01:26:43PM +0200, Konrad Dybcio wrote:
> From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
> 
> This is a detail that differ per chip, and not per IPA version (and
> there are cases of the same IPA versions being implemented across very
> very very different SoCs).
> 
> This region isn't actually used by the driver, but we most definitely
> want to iommu-map it, so that IPA can poke at the data within.
> 
> Reviewed-by: Alex Elder <elder@riscstar.com>
> Acked-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

...

> diff --git a/drivers/net/ipa/ipa_mem.c b/drivers/net/ipa/ipa_mem.c

...

> @@ -656,7 +659,23 @@ int ipa_mem_init(struct ipa *ipa, struct platform_device *pdev,
>  	ipa->mem_addr = res->start;
>  	ipa->mem_size = resource_size(res);
>  
> -	ret = ipa_imem_init(ipa, mem_data->imem_addr, mem_data->imem_size);
> +	ipa_slice_np = of_parse_phandle(dev->of_node, "sram", 0);
> +	if (ipa_slice_np) {
> +		ret = of_address_to_resource(ipa_slice_np, 0, res);
> +		of_node_put(ipa_slice_np);
> +		if (ret)
> +			return ret;
> +
> +		imem_base = res->start;
> +		imem_size = resource_size(res);
> +	} else {
> +		/* Backwards compatibility for DTs lacking
> +		 * an explicit reference */
> +		imem_base = mem_data->imem_addr;
> +		imem_size = mem_data->imem_size;
> +	}
> +
> +	ret = ipa_imem_init(ipa, imem_base, imem_size);

Thanks for the update to use imem_base and imem_size on the line above.

Reviewed-by: Simon Horman <horms@kernel.org>