linux-kernel - Re: [PATCH v6 4/8] remoteproc: qcom: Update rproc parse firmware callback

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Message-ID: <a298b048-1435-fc75-7855-bf93016eb280@quicinc.com>
Date:   Mon, 19 Sep 2022 19:45:35 +0530
From:   Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
To:     Sibi Sankar <quic_sibis@...cinc.com>,
        <linux-remoteproc@...r.kernel.org>, <agross@...nel.org>,
        <lgirdwood@...il.com>, <broonie@...nel.org>, <robh+dt@...nel.org>,
        <quic_plai@...cinc.com>, <bgoswami@...cinc.com>, <perex@...ex.cz>,
        <tiwai@...e.com>, <srinivas.kandagatla@...aro.org>,
        <quic_rohkumar@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <swboyd@...omium.org>,
        <judyhsiao@...omium.org>, <devicetree@...r.kernel.org>,
        <andersson@...nel.org>
Subject: Re: [PATCH v6 4/8] remoteproc: qcom: Update rproc parse firmware
 callback


On 9/14/2022 3:05 PM, Sibi Sankar wrote:
Thanks for Your time and valuable inputs Sibi Sankar!!!
>
> On 9/8/22 6:53 PM, Srinivasa Rao Mandadapu wrote:
>> Change parse_fw callback in rproc ops from qcom_register_dump_segments
>> to rproc_elf_load_rsc_table, as section header to be parsed for memory
>> sandboxing required platforms.
>>
>> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
>> ---
>>   drivers/remoteproc/qcom_q6v5_adsp.c | 5 ++++-
>>   1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c 
>> b/drivers/remoteproc/qcom_q6v5_adsp.c
>> index 02d17b4..207270d4 100644
>> --- a/drivers/remoteproc/qcom_q6v5_adsp.c
>> +++ b/drivers/remoteproc/qcom_q6v5_adsp.c
>> @@ -447,7 +447,7 @@ static unsigned long adsp_panic(struct rproc *rproc)
>>       return qcom_q6v5_panic(&adsp->q6v5);
>>   }
>>   -static const struct rproc_ops adsp_ops = {
>> +static struct rproc_ops adsp_ops = {
>>       .start = adsp_start,
>>       .stop = adsp_stop,
>>       .da_to_va = adsp_da_to_va,
>> @@ -590,6 +590,9 @@ static int adsp_probe(struct platform_device *pdev)
>>           return ret;
>>       }
>>   +    if (desc->has_iommu)
>> +        adsp_ops.parse_fw = rproc_elf_load_rsc_table;
>> +
>
> The parse_fw would still need to perform the register_dump_segments
> in addition to elf_load_rsc_table, otherwise you'll lose coredump
> functionality for ADSP on SC7280. You could perhaps just follow
> qcom_q6v5_mss parse_fw i.e. have a static func internal to adsp
> doing both and have it assigned to both wpss/adsp with the
> pre-existing has_iommu flag to differentiate between the two. With
> this you wouldn't need to remove the const in adsp_ops as well.
Okay. Will update accordingly and re spin the patches.
>
>>       rproc = rproc_alloc(&pdev->dev, pdev->name, &adsp_ops,
>>                   firmware_name, sizeof(*adsp));
>>       if (!rproc) {
>>