linux-kernel - Re: [PATCH v8 3/5] remoteproc: Pass size and offset as arguments to segment dump function

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Message-ID: <93a9dea3f4ee6dcb815530efec8afe92@codeaurora.org>
Date:   Fri, 17 Jul 2020 16:35:16 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     Rishabh Bhatnagar <rishabhb@...eaurora.org>
Cc:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        bjorn.andersson@...aro.org, mathieu.poirier@...aro.org,
        sibis@...earora.org, tsoni@...eaurora.org, psodagud@...eaurora.org,
        sidgup@...eaurora.org, linux-remoteproc-owner@...r.kernel.org
Subject: Re: [PATCH v8 3/5] remoteproc: Pass size and offset as arguments to
 segment dump function

On 2020-07-17 03:50, Rishabh Bhatnagar wrote:
> Change the segment dump API signature to include size and offset
> arguments. Refactor the qcom_q6v5_mss driver to use these
> arguments while copying the segment. Doing this lays the ground
> work for "inline" coredump functionality being added in the next
> patch.
> 
> Signed-off-by: Rishabh Bhatnagar <rishabhb@...eaurora.org>

Tested-by: Sibi Sankar <sibis@...eaurora.org>
Reviewed-by: Sibi Sankar <sibis@...eaurora.org>


> ---
>  drivers/remoteproc/qcom_q6v5_mss.c       | 10 +++++-----
>  drivers/remoteproc/remoteproc_coredump.c |  5 +++--
>  include/linux/remoteproc.h               |  5 +++--
>  3 files changed, 11 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/remoteproc/qcom_q6v5_mss.c
> b/drivers/remoteproc/qcom_q6v5_mss.c
> index 037cd45..6baa3ae 100644
> --- a/drivers/remoteproc/qcom_q6v5_mss.c
> +++ b/drivers/remoteproc/qcom_q6v5_mss.c
> @@ -1199,7 +1199,7 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
> 
>  static void qcom_q6v5_dump_segment(struct rproc *rproc,
>  				   struct rproc_dump_segment *segment,
> -				   void *dest)
> +				   void *dest, size_t cp_offset, size_t size)
>  {
>  	int ret = 0;
>  	struct q6v5 *qproc = rproc->priv;
> @@ -1219,16 +1219,16 @@ static void qcom_q6v5_dump_segment(struct rproc 
> *rproc,
>  	}
> 
>  	if (!ret)
> -		ptr = ioremap_wc(qproc->mpss_phys + offset, segment->size);
> +		ptr = ioremap_wc(qproc->mpss_phys + offset + cp_offset, size);
> 
>  	if (ptr) {
> -		memcpy(dest, ptr, segment->size);
> +		memcpy(dest, ptr, size);
>  		iounmap(ptr);
>  	} else {
> -		memset(dest, 0xff, segment->size);
> +		memset(dest, 0xff, size);
>  	}
> 
> -	qproc->current_dump_size += segment->size;
> +	qproc->current_dump_size += size;
> 
>  	/* Reclaim mba after copying segments */
>  	if (qproc->current_dump_size == qproc->total_dump_size) {
> diff --git a/drivers/remoteproc/remoteproc_coredump.c
> b/drivers/remoteproc/remoteproc_coredump.c
> index ded0244..390f563 100644
> --- a/drivers/remoteproc/remoteproc_coredump.c
> +++ b/drivers/remoteproc/remoteproc_coredump.c
> @@ -72,7 +72,8 @@ int rproc_coredump_add_custom_segment(struct rproc 
> *rproc,
>  				      dma_addr_t da, size_t size,
>  				      void (*dumpfn)(struct rproc *rproc,
>  						     struct rproc_dump_segment *segment,
> -						     void *dest),
> +						     void *dest, size_t offset,
> +						     size_t size),
>  				      void *priv)
>  {
>  	struct rproc_dump_segment *segment;
> @@ -183,7 +184,7 @@ void rproc_coredump(struct rproc *rproc)
>  		elf_phdr_set_p_align(class, phdr, 0);
> 
>  		if (segment->dump) {
> -			segment->dump(rproc, segment, data + offset);
> +			segment->dump(rproc, segment, data + offset, 0, segment->size);
>  		} else {
>  			ptr = rproc_da_to_va(rproc, segment->da, segment->size);
>  			if (!ptr) {
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index e7b7bab..eb08139 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -451,7 +451,7 @@ struct rproc_dump_segment {
> 
>  	void *priv;
>  	void (*dump)(struct rproc *rproc, struct rproc_dump_segment *segment,
> -		     void *dest);
> +		     void *dest, size_t offset, size_t size);
>  	loff_t offset;
>  };
> 
> @@ -630,7 +630,8 @@ int rproc_coredump_add_custom_segment(struct rproc 
> *rproc,
>  				      dma_addr_t da, size_t size,
>  				      void (*dumpfn)(struct rproc *rproc,
>  						     struct rproc_dump_segment *segment,
> -						     void *dest),
> +						     void *dest, size_t offset,
> +						     size_t size),
>  				      void *priv);
>  int rproc_coredump_set_elf_info(struct rproc *rproc, u8 class, u16 
> machine);

-- 
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