linux-kernel - Re: [PATCH v1 01/10] bus: mhi: core: Use appropriate names for firmware load functions

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Message-ID: <20201009152314.GB4810@Mani-XPS-13-9360>
Date:   Fri, 9 Oct 2020 20:53:14 +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
Subject: Re: [PATCH v1 01/10] bus: mhi: core: Use appropriate names for
 firmware load functions

On Fri, Sep 18, 2020 at 07:02:26PM -0700, Bhaumik Bhatt wrote:
> mhi_fw_load_sbl() function is currently used to transfer SBL or EDL
> images over BHI (Boot Host Interface). Same goes with mhi_fw_load_amss()
> which uses BHIe. However, the contents of these functions do not
> indicate support for a specific set of images. Since these can be used
> for any image download over BHI or BHIe, rename them based on the
> protocol used.
> 
> Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
> ---
>  drivers/bus/mhi/core/boot.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c
> index 24422f5..92b8dd3 100644
> --- a/drivers/bus/mhi/core/boot.c
> +++ b/drivers/bus/mhi/core/boot.c
> @@ -171,7 +171,7 @@ int mhi_download_rddm_img(struct mhi_controller *mhi_cntrl, bool in_panic)
>  }
>  EXPORT_SYMBOL_GPL(mhi_download_rddm_img);
>  
> -static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl,
> +static int mhi_fw_load_bhie(struct mhi_controller *mhi_cntrl,
>  			    const struct mhi_buf *mhi_buf)
>  {
>  	void __iomem *base = mhi_cntrl->bhie;
> @@ -187,7 +187,7 @@ static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl,
>  	}
>  
>  	sequence_id = MHI_RANDOM_U32_NONZERO(BHIE_TXVECSTATUS_SEQNUM_BMSK);
> -	dev_dbg(dev, "Starting AMSS download via BHIe. Sequence ID:%u\n",
> +	dev_dbg(dev, "Starting image download via BHIe. Sequence ID:%u\n",
>  		sequence_id);
>  	mhi_write_reg(mhi_cntrl, base, BHIE_TXVECADDR_HIGH_OFFS,
>  		      upper_32_bits(mhi_buf->dma_addr));
> @@ -218,7 +218,7 @@ static int mhi_fw_load_amss(struct mhi_controller *mhi_cntrl,
>  	return (!ret) ? -ETIMEDOUT : 0;
>  }
>  
> -static int mhi_fw_load_sbl(struct mhi_controller *mhi_cntrl,
> +static int mhi_fw_load_bhi(struct mhi_controller *mhi_cntrl,
>  			   dma_addr_t dma_addr,
>  			   size_t size)
>  {
> @@ -245,7 +245,7 @@ static int mhi_fw_load_sbl(struct mhi_controller *mhi_cntrl,
>  	}
>  
>  	session_id = MHI_RANDOM_U32_NONZERO(BHI_TXDB_SEQNUM_BMSK);
> -	dev_dbg(dev, "Starting SBL download via BHI. Session ID:%u\n",
> +	dev_dbg(dev, "Starting image download via BHI. Session ID:%u\n",
>  		session_id);
>  	mhi_write_reg(mhi_cntrl, base, BHI_STATUS, 0);
>  	mhi_write_reg(mhi_cntrl, base, BHI_IMGADDR_HIGH,
> @@ -446,9 +446,9 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
>  		return;
>  	}
>  
> -	/* Download SBL image */
> +	/* Download SBL or EDL image using BHI */

You are mentioning "image" in the debug print but "SBL/EDL" here and below.
Please use "image" for consistency.

Thanks,
Mani

>  	memcpy(buf, firmware->data, size);
> -	ret = mhi_fw_load_sbl(mhi_cntrl, dma_addr, size);
> +	ret = mhi_fw_load_bhi(mhi_cntrl, dma_addr, size);
>  	mhi_free_coherent(mhi_cntrl, size, buf, dma_addr);
>  
>  	if (!mhi_cntrl->fbc_download || ret || mhi_cntrl->ee == MHI_EE_EDL)
> @@ -456,7 +456,7 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
>  
>  	/* Error or in EDL mode, we're done */
>  	if (ret) {
> -		dev_err(dev, "MHI did not load SBL, ret:%d\n", ret);
> +		dev_err(dev, "MHI did not load SBL/EDL image, ret:%d\n", ret);
>  		return;
>  	}
>  
> @@ -506,7 +506,7 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
>  
>  	/* Start full firmware image download */
>  	image_info = mhi_cntrl->fbc_image;
> -	ret = mhi_fw_load_amss(mhi_cntrl,
> +	ret = mhi_fw_load_bhie(mhi_cntrl,
>  			       /* Vector table is the last entry */
>  			       &image_info->mhi_buf[image_info->entries - 1]);
>  	if (ret)
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>