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Message-ID: <39b4bafd-410f-cae8-13ae-e18d751b51a2@quicinc.com>
Date:   Mon, 24 Jul 2023 17:58:45 +0530
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Subject: Re: [PATCH v5 2/6] soc: qcom: llcc: Refactor llcc driver to support
 multiple configuration
Content-Language: en-US
To:     Komal Bajaj <quic_kbajaj@quicinc.com>, <agross@kernel.org>,
        <andersson@kernel.org>, <konrad.dybcio@linaro.org>,
        <robh+dt@kernel.org>, <krzysztof.kozlowski+dt@linaro.org>,
        <conor+dt@kernel.org>, <srinivas.kandagatla@linaro.org>
CC:     <linux-arm-msm@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
References: <20230724084155.8682-1-quic_kbajaj@quicinc.com>
 <20230724084155.8682-3-quic_kbajaj@quicinc.com>
From:   Mukesh Ojha <quic_mojha@quicinc.com>
In-Reply-To: <20230724084155.8682-3-quic_kbajaj@quicinc.com>
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Precedence: bulk


On 7/24/2023 2:11 PM, Komal Bajaj wrote:
> Refactor driver to support multiple configuration for llcc on a target.
> 
> Signed-off-by: Komal Bajaj <quic_kbajaj@quicinc.com>
> ---
>   drivers/soc/qcom/llcc-qcom.c | 264 +++++++++++++++++++++++------------
>   1 file changed, 178 insertions(+), 86 deletions(-)
> 
> diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
> index 67c19ed2219a..321f8d2079f7 100644
> --- a/drivers/soc/qcom/llcc-qcom.c
> +++ b/drivers/soc/qcom/llcc-qcom.c
> @@ -127,6 +127,12 @@ struct qcom_llcc_config {
>   	bool no_edac;
>   };
>   
> +struct qcom_sct_config

const ?
  > +	const struct qcom_llcc_config *llcc_config;
> +	int num_cfgs;
> +};
> +
> +
>   enum llcc_reg_offset {
>   	LLCC_COMMON_HW_INFO,
>   	LLCC_COMMON_STATUS0,
> @@ -423,101 +429,185 @@ static const u32 llcc_v2_1_reg_offset[] = {
>   	[LLCC_COMMON_STATUS0]	= 0x0003400c,
>   };
>   
> -static const struct qcom_llcc_config sc7180_cfg = {
> -	.sct_data	= sc7180_data,
> -	.size		= ARRAY_SIZE(sc7180_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v1_reg_offset,
> -	.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +static const struct qcom_llcc_config sc7180_cfg[] = {
> +	{
> +		.sct_data	= sc7180_data,
> +		.size		= ARRAY_SIZE(sc7180_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v1_reg_offset,
> +		.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sc7280_cfg[] = {
> +	{
> +		.sct_data	= sc7280_data,
> +		.size		= ARRAY_SIZE(sc7280_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v1_reg_offset,
> +		.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sc8180x_cfg[] = {
> +	{
> +		.sct_data	= sc8180x_data,
> +		.size		= ARRAY_SIZE(sc8180x_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v1_reg_offset,
> +		.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sc8280xp_cfg[] = {
> +	{
> +		.sct_data	= sc8280xp_data,
> +		.size		= ARRAY_SIZE(sc8280xp_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v1_reg_offset,
> +		.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sdm845_cfg[] = {
> +	{
> +		.sct_data	= sdm845_data,
> +		.size		= ARRAY_SIZE(sdm845_data),
> +		.need_llcc_cfg	= false,
> +		.reg_offset	= llcc_v1_reg_offset,
> +		.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +		.no_edac	= true,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sm6350_cfg[] = {
> +	{
> +		.sct_data	= sm6350_data,
> +		.size		= ARRAY_SIZE(sm6350_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v1_reg_offset,
> +		.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sm7150_cfg[] = {
> +	{
> +		.sct_data       = sm7150_data,
> +		.size           = ARRAY_SIZE(sm7150_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v1_reg_offset,
> +		.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sm8150_cfg[] = {
> +	{
> +		.sct_data       = sm8150_data,
> +		.size           = ARRAY_SIZE(sm8150_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v1_reg_offset,
> +		.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sm8250_cfg[] = {
> +	{
> +		.sct_data       = sm8250_data,
> +		.size           = ARRAY_SIZE(sm8250_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v1_reg_offset,
> +		.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sm8350_cfg[] = {
> +	{
> +		.sct_data       = sm8350_data,
> +		.size           = ARRAY_SIZE(sm8350_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v1_reg_offset,
> +		.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sm8450_cfg[] = {
> +	{
> +		.sct_data       = sm8450_data,
> +		.size           = ARRAY_SIZE(sm8450_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v2_1_reg_offset,
> +		.edac_reg_offset = &llcc_v2_1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_llcc_config sm8550_cfg[] = {
> +	{
> +		.sct_data       = sm8550_data,
> +		.size           = ARRAY_SIZE(sm8550_data),
> +		.need_llcc_cfg	= true,
> +		.reg_offset	= llcc_v2_1_reg_offset,
> +		.edac_reg_offset = &llcc_v2_1_edac_reg_offset,
> +	},
> +};
> +
> +static const struct qcom_sct_config sc7180_cfgs = {
> +	.llcc_config	= sc7180_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sc7280_cfg = {
> -	.sct_data	= sc7280_data,
> -	.size		= ARRAY_SIZE(sc7280_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v1_reg_offset,
> -	.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +static const struct qcom_sct_config sc7280_cfgs = {
> +	.llcc_config	= sc7280_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sc8180x_cfg = {
> -	.sct_data	= sc8180x_data,
> -	.size		= ARRAY_SIZE(sc8180x_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v1_reg_offset,
> -	.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +static const struct qcom_sct_config sc8180x_cfgs = {
> +	.llcc_config	= sc8180x_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sc8280xp_cfg = {
> -	.sct_data	= sc8280xp_data,
> -	.size		= ARRAY_SIZE(sc8280xp_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v1_reg_offset,
> -	.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +static const struct qcom_sct_config sc8280xp_cfgs = {
> +	.llcc_config	= sc8280xp_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sdm845_cfg = {
> -	.sct_data	= sdm845_data,
> -	.size		= ARRAY_SIZE(sdm845_data),
> -	.need_llcc_cfg	= false,
> -	.reg_offset	= llcc_v1_reg_offset,
> -	.edac_reg_offset = &llcc_v1_edac_reg_offset,
> -	.no_edac	= true,
> +static const struct qcom_sct_config sdm845_cfgs = {
> +	.llcc_config	= sdm845_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sm6350_cfg = {
> -	.sct_data	= sm6350_data,
> -	.size		= ARRAY_SIZE(sm6350_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v1_reg_offset,
> -	.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +static const struct qcom_sct_config sm6350_cfgs = {
> +	.llcc_config	= sm6350_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sm7150_cfg = {
> -	.sct_data       = sm7150_data,
> -	.size           = ARRAY_SIZE(sm7150_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v1_reg_offset,
> -	.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +static const struct qcom_sct_config sm7150_cfgs = {
> +	.llcc_config	= sm7150_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sm8150_cfg = {
> -	.sct_data       = sm8150_data,
> -	.size           = ARRAY_SIZE(sm8150_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v1_reg_offset,
> -	.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +static const struct qcom_sct_config sm8150_cfgs = {
> +	.llcc_config	= sm8150_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sm8250_cfg = {
> -	.sct_data       = sm8250_data,
> -	.size           = ARRAY_SIZE(sm8250_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v1_reg_offset,
> -	.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +static const struct qcom_sct_config sm8250_cfgs = {
> +	.llcc_config	= sm8250_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sm8350_cfg = {
> -	.sct_data       = sm8350_data,
> -	.size           = ARRAY_SIZE(sm8350_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v1_reg_offset,
> -	.edac_reg_offset = &llcc_v1_edac_reg_offset,
> +static const struct qcom_sct_config sm8350_cfgs = {
> +	.llcc_config	= sm8350_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sm8450_cfg = {
> -	.sct_data       = sm8450_data,
> -	.size           = ARRAY_SIZE(sm8450_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v2_1_reg_offset,
> -	.edac_reg_offset = &llcc_v2_1_edac_reg_offset,
> +static const struct qcom_sct_config sm8450_cfgs = {
> +	.llcc_config	= sm8450_cfg,
> +	.num_cfgs	= 1,
>   };
>   
> -static const struct qcom_llcc_config sm8550_cfg = {
> -	.sct_data       = sm8550_data,
> -	.size           = ARRAY_SIZE(sm8550_data),
> -	.need_llcc_cfg	= true,
> -	.reg_offset	= llcc_v2_1_reg_offset,
> -	.edac_reg_offset = &llcc_v2_1_edac_reg_offset,
> +static const struct qcom_sct_config sm8550_cfgs = {
> +	.llcc_config	= sm8550_cfg,
> +	.num_cfgs	= 1,

num prefix itself take care of singular/plural, num_config would do
good.


>   };
>   
>   static struct llcc_drv_data *drv_data = (void *) -EPROBE_DEFER;
> @@ -939,6 +1029,7 @@ static int qcom_llcc_probe(struct platform_device *pdev)
>   	struct device *dev = &pdev->dev;
>   	int ret, i;
>   	struct platform_device *llcc_edac;
> +	const struct qcom_sct_config *cfgs;
>   	const struct qcom_llcc_config *cfg;
>   	const struct llcc_slice_config *llcc_cfg;
>   	u32 sz;
> @@ -958,7 +1049,8 @@ static int qcom_llcc_probe(struct platform_device *pdev)
>   		goto err;
>   	}
>   
> -	cfg = of_device_get_match_data(&pdev->dev);
> +	cfgs = of_device_get_match_data(&pdev->dev);
> +	cfg = &cfgs->llcc_config[0];

Hardcoding without check ?

#define DEFAULT_NUM_CFG    1

if (cfgs->num_cfgs != DEFAULT_NUM_CFG)
      ret = -EINVAL;
      goto err;

cfg = &cfgs->llcc_config[DEFAULT_NUM_CFG - 1];

I would let others comment as well..


-Mukesh

>   
>   	ret = regmap_read(regmap, cfg->reg_offset[LLCC_COMMON_STATUS0], &num_banks);
>   	if (ret)
> @@ -1051,18 +1143,18 @@ static int qcom_llcc_probe(struct platform_device *pdev)
>   }
>   
>   static const struct of_device_id qcom_llcc_of_match[] = {
> -	{ .compatible = "qcom,sc7180-llcc", .data = &sc7180_cfg },
> -	{ .compatible = "qcom,sc7280-llcc", .data = &sc7280_cfg },
> -	{ .compatible = "qcom,sc8180x-llcc", .data = &sc8180x_cfg },
> -	{ .compatible = "qcom,sc8280xp-llcc", .data = &sc8280xp_cfg },
> -	{ .compatible = "qcom,sdm845-llcc", .data = &sdm845_cfg },
> -	{ .compatible = "qcom,sm6350-llcc", .data = &sm6350_cfg },
> -	{ .compatible = "qcom,sm7150-llcc", .data = &sm7150_cfg },
> -	{ .compatible = "qcom,sm8150-llcc", .data = &sm8150_cfg },
> -	{ .compatible = "qcom,sm8250-llcc", .data = &sm8250_cfg },
> -	{ .compatible = "qcom,sm8350-llcc", .data = &sm8350_cfg },
> -	{ .compatible = "qcom,sm8450-llcc", .data = &sm8450_cfg },
> -	{ .compatible = "qcom,sm8550-llcc", .data = &sm8550_cfg },
> +	{ .compatible = "qcom,sc7180-llcc", .data = &sc7180_cfgs },
> +	{ .compatible = "qcom,sc7280-llcc", .data = &sc7280_cfgs },
> +	{ .compatible = "qcom,sc8180x-llcc", .data = &sc8180x_cfgs },
> +	{ .compatible = "qcom,sc8280xp-llcc", .data = &sc8280xp_cfgs },
> +	{ .compatible = "qcom,sdm845-llcc", .data = &sdm845_cfgs },
> +	{ .compatible = "qcom,sm6350-llcc", .data = &sm6350_cfgs },
> +	{ .compatible = "qcom,sm7150-llcc", .data = &sm7150_cfgs },
> +	{ .compatible = "qcom,sm8150-llcc", .data = &sm8150_cfgs },
> +	{ .compatible = "qcom,sm8250-llcc", .data = &sm8250_cfgs },
> +	{ .compatible = "qcom,sm8350-llcc", .data = &sm8350_cfgs },
> +	{ .compatible = "qcom,sm8450-llcc", .data = &sm8450_cfgs },
> +	{ .compatible = "qcom,sm8550-llcc", .data = &sm8550_cfgs },
>   	{ }
>   };
>   MODULE_DEVICE_TABLE(of, qcom_llcc_of_match);