linux-kernel - Re: [PATCH v4 4/4] remoteproc: qcom: Introduce panic handler for PAS and ADSP

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Date:   Mon, 23 Mar 2020 16:45:36 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>, Ohad Ben-Cohen <ohad@...ery.com>,
        linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/4] remoteproc: qcom: Introduce panic handler for PAS
 and ADSP

On Mon, Mar 09, 2020 at 11:38:17PM -0700, Bjorn Andersson wrote:
> Make the PAS and ADSP/CDSP remoteproc drivers implement the panic
> handler that will invoke a stop to prepare the remoteprocs for post
> mortem debugging.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
> 
> Change since v3:
>  - Change return type to unsigned long
> 
>  drivers/remoteproc/qcom_q6v5_adsp.c | 8 ++++++++
>  drivers/remoteproc/qcom_q6v5_pas.c  | 8 ++++++++
>  2 files changed, 16 insertions(+)
> 
> diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c b/drivers/remoteproc/qcom_q6v5_adsp.c
> index d5cdff942535..8f1044e8ea3b 100644
> --- a/drivers/remoteproc/qcom_q6v5_adsp.c
> +++ b/drivers/remoteproc/qcom_q6v5_adsp.c
> @@ -292,12 +292,20 @@ static void *adsp_da_to_va(struct rproc *rproc, u64 da, int len)
>  	return adsp->mem_region + offset;
>  }
>  
> +static unsigned long adsp_panic(struct rproc *rproc)
> +{
> +	struct qcom_adsp *adsp = rproc->priv;
> +
> +	return qcom_q6v5_panic(&adsp->q6v5);
> +}
> +
>  static const struct rproc_ops adsp_ops = {
>  	.start = adsp_start,
>  	.stop = adsp_stop,
>  	.da_to_va = adsp_da_to_va,
>  	.parse_fw = qcom_register_dump_segments,
>  	.load = adsp_load,
> +	.panic = adsp_panic,
>  };
>  
>  static int adsp_init_clock(struct qcom_adsp *adsp, const char **clk_ids)
> diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
> index e64c268e6113..678c0ddfce96 100644
> --- a/drivers/remoteproc/qcom_q6v5_pas.c
> +++ b/drivers/remoteproc/qcom_q6v5_pas.c
> @@ -243,12 +243,20 @@ static void *adsp_da_to_va(struct rproc *rproc, u64 da, int len)
>  	return adsp->mem_region + offset;
>  }
>  
> +static unsigned long adsp_panic(struct rproc *rproc)
> +{
> +	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;

Above rproc->priv is not casted but it is here... Not a problem, just
consistency.

Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>

> +
> +	return qcom_q6v5_panic(&adsp->q6v5);
> +}
> +
>  static const struct rproc_ops adsp_ops = {
>  	.start = adsp_start,
>  	.stop = adsp_stop,
>  	.da_to_va = adsp_da_to_va,
>  	.parse_fw = qcom_register_dump_segments,
>  	.load = adsp_load,
> +	.panic = adsp_panic,
>  };
>  
>  static int adsp_init_clock(struct qcom_adsp *adsp)
> -- 
> 2.24.0
>