linux-kernel - Re: [PATCH v6 2/8] remoteproc: qcom: Add flag in adsp private data structure

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Date:   Wed, 14 Sep 2022 14:36:36 +0530
From:   Sibi Sankar <quic_sibis@...cinc.com>
To:     Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>,
        <linux-remoteproc@...r.kernel.org>, <agross@...nel.org>,
        <bjorn.andersson@...aro.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>
Subject: Re: [PATCH v6 2/8] remoteproc: qcom: Add flag in adsp private data
 structure

On 9/8/22 6:53 PM, Srinivasa Rao Mandadapu wrote:
> Add flag in qcom_adsp private data structure and initialize
> it to distinguish ADSP and WPSS modules for using iommu selectively.

There are other flags available to distinguish between ADSP and WPSS
like 'is_wpss'. So you probably want to tweak your commit message to
just say if it has a iommu in front of it or not and skip referencing
WPSS.

Reviewed-by: Sibi Sankar <quic_sibis@...cinc.com>

> 
> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
> Reviewed-by: Stephen Boyd <swboyd@...omium.org>
> ---
> Changes since V5:
> 	-- Rename adsp_sandbox_needed to has_iommu.
> Changes since V3:
> 	-- Rename is_adsp_sb_needed to adsp_sandbox_needed.
> Changes since V2:
> 	-- Add is_adsp_sb_needed flag instead of is_wpss.
> 
>   drivers/remoteproc/qcom_q6v5_adsp.c | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c b/drivers/remoteproc/qcom_q6v5_adsp.c
> index 2f3b9f5..fa2ccac 100644
> --- a/drivers/remoteproc/qcom_q6v5_adsp.c
> +++ b/drivers/remoteproc/qcom_q6v5_adsp.c
> @@ -62,6 +62,7 @@ struct adsp_pil_data {
>   	const char *sysmon_name;
>   	int ssctl_id;
>   	bool is_wpss;
> +	bool has_iommu;
>   	bool auto_boot;
>   
>   	const char **clk_ids;
> @@ -99,6 +100,7 @@ struct qcom_adsp {
>   	phys_addr_t mem_reloc;
>   	void *mem_region;
>   	size_t mem_size;
> +	bool has_iommu;
>   
>   	struct device *proxy_pds[QCOM_Q6V5_RPROC_PROXY_PD_MAX];
>   	size_t proxy_pd_count;
> @@ -596,12 +598,15 @@ static int adsp_probe(struct platform_device *pdev)
>   	}
>   
>   	rproc->auto_boot = desc->auto_boot;
> +	rproc->has_iommu = desc->has_iommu;
>   	rproc_coredump_set_elf_info(rproc, ELFCLASS32, EM_NONE);
>   
>   	adsp = (struct qcom_adsp *)rproc->priv;
>   	adsp->dev = &pdev->dev;
>   	adsp->rproc = rproc;
>   	adsp->info_name = desc->sysmon_name;
> +	adsp->has_iommu = desc->has_iommu;
> +
>   	platform_set_drvdata(pdev, adsp);
>   
>   	if (desc->is_wpss)
>