linux-kernel - Re: [PATCH net-next] net: ipa: correct IPA v4.7 IMEM offset

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Message-ID: <cfab116b-6032-401a-bf81-44365c878b38@linaro.org>
Date:   Wed, 4 Jan 2023 21:38:11 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Alex Elder <elder@...aro.org>, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com
Cc:     luca.weiss@...rphone.com, caleb.connolly@...aro.org,
        mka@...omium.org, evgreen@...omium.org, andersson@...nel.org,
        quic_cpratapa@...cinc.com, quic_avuyyuru@...cinc.com,
        quic_jponduru@...cinc.com, quic_subashab@...cinc.com,
        elder@...nel.org, netdev@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: ipa: correct IPA v4.7 IMEM offset



On 4.01.2023 19:10, Alex Elder wrote:
> Commit b310de784bacd ("net: ipa: add IPA v4.7 support") was merged
> despite an unresolved comment made by Konrad Dybcio.  Konrad
> observed that the IMEM region specified for IPA v4.7 did not match
> that used downstream for the SM7225 SoC.  In "lagoon.dtsi" present
> in a Sony Xperia source tree, a ipa_smmu_ap node was defined with a
> "qcom,additional-mapping" property that defined the IPA IMEM area
> starting at offset 0x146a8000 (not 0x146a9000 that was committed).
> 
> The IPA v4.7 target system used for testing uses the SM7225 SoC, so
> we'll adhere what the downstream code specifies is the address of
> the IMEM region used for IPA.
> 
> Link: https://lore.kernel.org/linux-arm-msm/20221208211529.757669-1-elder@linaro.org
> Tested-by: Luca Weiss <luca.weiss@...rphone.com>
> Signed-off-by: Alex Elder <elder@...aro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad
> Note:  This fixes a commit that first landed in v6.2-rc1.
> 
>  drivers/net/ipa/data/ipa_data-v4.7.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ipa/data/ipa_data-v4.7.c b/drivers/net/ipa/data/ipa_data-v4.7.c
> index 7552c400961eb..b83390c486158 100644
> --- a/drivers/net/ipa/data/ipa_data-v4.7.c
> +++ b/drivers/net/ipa/data/ipa_data-v4.7.c
> @@ -357,7 +357,7 @@ static const struct ipa_mem ipa_mem_local_data[] = {
>  static const struct ipa_mem_data ipa_mem_data = {
>  	.local_count	= ARRAY_SIZE(ipa_mem_local_data),
>  	.local		= ipa_mem_local_data,
> -	.imem_addr	= 0x146a9000,
> +	.imem_addr	= 0x146a8000,
>  	.imem_size	= 0x00002000,
>  	.smem_id	= 497,
>  	.smem_size	= 0x00009000,