linux-kernel - Re: [PATCHv5 1/2] soc: qcom: llcc: Move llcc configuration to its own function

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Message-ID: <20200915160137.GH478@uller>
Date:   Tue, 15 Sep 2020 16:01:37 +0000
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Cc:     Andy Gross <agross@...nel.org>,
        Douglas Anderson <dianders@...omium.org>,
        Stephen Boyd <swboyd@...omium.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCHv5 1/2] soc: qcom: llcc: Move llcc configuration to its
 own function

On Tue 15 Sep 06:55 UTC 2020, Sai Prakash Ranjan wrote:

> Cleanup qcom_llcc_cfg_program() by moving llcc configuration
> to a separate function of its own. Also correct misspelled
> 'instance' caught by checkpatch.
> 
> Suggested-by: Stephen Boyd <swboyd@...omium.org>
> Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

> ---
>  drivers/soc/qcom/llcc-qcom.c | 89 ++++++++++++++++++++----------------
>  1 file changed, 50 insertions(+), 39 deletions(-)
> 
> diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
> index 429b5a60a1ba..14311060099d 100644
> --- a/drivers/soc/qcom/llcc-qcom.c
> +++ b/drivers/soc/qcom/llcc-qcom.c
> @@ -318,62 +318,73 @@ size_t llcc_get_slice_size(struct llcc_slice_desc *desc)
>  }
>  EXPORT_SYMBOL_GPL(llcc_get_slice_size);
>  
> -static int qcom_llcc_cfg_program(struct platform_device *pdev)
> +static int _qcom_llcc_cfg_program(const struct llcc_slice_config *config)
>  {
> -	int i;
> +	int ret;
>  	u32 attr1_cfg;
>  	u32 attr0_cfg;
>  	u32 attr1_val;
>  	u32 attr0_val;
>  	u32 max_cap_cacheline;
> +	struct llcc_slice_desc desc;
> +
> +	attr1_val = config->cache_mode;
> +	attr1_val |= config->probe_target_ways << ATTR1_PROBE_TARGET_WAYS_SHIFT;
> +	attr1_val |= config->fixed_size << ATTR1_FIXED_SIZE_SHIFT;
> +	attr1_val |= config->priority << ATTR1_PRIORITY_SHIFT;
> +
> +	max_cap_cacheline = MAX_CAP_TO_BYTES(config->max_cap);
> +
> +	/*
> +	 * LLCC instances can vary for each target.
> +	 * The SW writes to broadcast register which gets propagated
> +	 * to each llcc instance (llcc0,.. llccN).
> +	 * Since the size of the memory is divided equally amongst the
> +	 * llcc instances, we need to configure the max cap accordingly.
> +	 */
> +	max_cap_cacheline = max_cap_cacheline / drv_data->num_banks;
> +	max_cap_cacheline >>= CACHE_LINE_SIZE_SHIFT;
> +	attr1_val |= max_cap_cacheline << ATTR1_MAX_CAP_SHIFT;
> +
> +	attr1_cfg = LLCC_TRP_ATTR1_CFGn(config->slice_id);
> +
> +	ret = regmap_write(drv_data->bcast_regmap, attr1_cfg, attr1_val);
> +	if (ret)
> +		return ret;
> +
> +	attr0_val = config->res_ways & ATTR0_RES_WAYS_MASK;
> +	attr0_val |= config->bonus_ways << ATTR0_BONUS_WAYS_SHIFT;
> +
> +	attr0_cfg = LLCC_TRP_ATTR0_CFGn(config->slice_id);
> +
> +	ret = regmap_write(drv_data->bcast_regmap, attr0_cfg, attr0_val);
> +	if (ret)
> +		return ret;
> +
> +	if (config->activate_on_init) {
> +		desc.slice_id = config->slice_id;
> +		ret = llcc_slice_activate(&desc);
> +	}
> +
> +	return ret;
> +}
> +
> +static int qcom_llcc_cfg_program(struct platform_device *pdev)
> +{
> +	int i;
>  	u32 sz;
>  	int ret = 0;
>  	const struct llcc_slice_config *llcc_table;
> -	struct llcc_slice_desc desc;
>  
>  	sz = drv_data->cfg_size;
>  	llcc_table = drv_data->cfg;
>  
>  	for (i = 0; i < sz; i++) {
> -		attr1_cfg = LLCC_TRP_ATTR1_CFGn(llcc_table[i].slice_id);
> -		attr0_cfg = LLCC_TRP_ATTR0_CFGn(llcc_table[i].slice_id);
> -
> -		attr1_val = llcc_table[i].cache_mode;
> -		attr1_val |= llcc_table[i].probe_target_ways <<
> -				ATTR1_PROBE_TARGET_WAYS_SHIFT;
> -		attr1_val |= llcc_table[i].fixed_size <<
> -				ATTR1_FIXED_SIZE_SHIFT;
> -		attr1_val |= llcc_table[i].priority <<
> -				ATTR1_PRIORITY_SHIFT;
> -
> -		max_cap_cacheline = MAX_CAP_TO_BYTES(llcc_table[i].max_cap);
> -
> -		/* LLCC instances can vary for each target.
> -		 * The SW writes to broadcast register which gets propagated
> -		 * to each llcc instace (llcc0,.. llccN).
> -		 * Since the size of the memory is divided equally amongst the
> -		 * llcc instances, we need to configure the max cap accordingly.
> -		 */
> -		max_cap_cacheline = max_cap_cacheline / drv_data->num_banks;
> -		max_cap_cacheline >>= CACHE_LINE_SIZE_SHIFT;
> -		attr1_val |= max_cap_cacheline << ATTR1_MAX_CAP_SHIFT;
> -
> -		attr0_val = llcc_table[i].res_ways & ATTR0_RES_WAYS_MASK;
> -		attr0_val |= llcc_table[i].bonus_ways << ATTR0_BONUS_WAYS_SHIFT;
> -
> -		ret = regmap_write(drv_data->bcast_regmap, attr1_cfg,
> -					attr1_val);
> +		ret = _qcom_llcc_cfg_program(&llcc_table[i]);
>  		if (ret)
>  			return ret;
> -		ret = regmap_write(drv_data->bcast_regmap, attr0_cfg,
> -					attr0_val);
> -		if (ret)
> -			return ret;
> -		if (llcc_table[i].activate_on_init) {
> -			desc.slice_id = llcc_table[i].slice_id;
> -			ret = llcc_slice_activate(&desc);
> -		}
>  	}
> +
>  	return ret;
>  }
>  
> -- 
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> of Code Aurora Forum, hosted by The Linux Foundation
>