linux-kernel - Re: [PATCH v4 3/6] bus: mhi: Add MMIO region length to controller structure

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Date:   Fri, 21 May 2021 19:08:12 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Bhaumik Bhatt <bbhatt@...eaurora.org>
Cc:     linux-arm-msm@...r.kernel.org, hemantk@...eaurora.org,
        jhugo@...eaurora.org, linux-kernel@...r.kernel.org,
        loic.poulain@...aro.org, linux-wireless@...r.kernel.org,
        kvalo@...eaurora.org, ath11k@...ts.infradead.org
Subject: Re: [PATCH v4 3/6] bus: mhi: Add MMIO region length to controller
 structure

On Thu, May 06, 2021 at 12:51:42PM -0700, Bhaumik Bhatt wrote:
> Make controller driver specify the MMIO register region length
> for range checking of BHI or BHIe space. This can help validate
> that offsets are in acceptable memory region or not and avoid any
> boot-up issues due to BHI or BHIe memory accesses.
> 
> Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
> Reviewed-by: Jeffrey Hugo <quic_jhugo@...cinc.com>
> Reviewed-by: Hemant Kumar <hemantk@...eaurora.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Thanks,
Mani

> ---
>  include/linux/mhi.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> index 944aa3a..9c347f5 100644
> --- a/include/linux/mhi.h
> +++ b/include/linux/mhi.h
> @@ -303,6 +303,7 @@ struct mhi_controller_config {
>   * @rddm_size: RAM dump size that host should allocate for debugging purpose
>   * @sbl_size: SBL image size downloaded through BHIe (optional)
>   * @seg_len: BHIe vector size (optional)
> + * @reg_len: Length of the MHI MMIO region (required)
>   * @fbc_image: Points to firmware image buffer
>   * @rddm_image: Points to RAM dump buffer
>   * @mhi_chan: Points to the channel configuration table
> @@ -386,6 +387,7 @@ struct mhi_controller {
>  	size_t rddm_size;
>  	size_t sbl_size;
>  	size_t seg_len;
> +	size_t reg_len;
>  	struct image_info *fbc_image;
>  	struct image_info *rddm_image;
>  	struct mhi_chan *mhi_chan;
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>