linux-kernel - Re: [PATCH 2/4] firmware: xilinx: add new function for do_feature_check

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Date:   Fri, 29 Apr 2022 10:35:21 +0200
From:   Michal Simek <michal.simek@...inx.com>
To:     Ronak Jain <ronak.jain@...inx.com>, <michal.simek@...inx.com>,
        <linux-kernel@...r.kernel.org>
CC:     <gregkh@...uxfoundation.org>, <corbet@....net>,
        <linux-arm-kernel@...ts.infradead.org>, <arnd@...db.de>,
        <lakshmi.sai.krishna.potthuri@...inx.com>, <radheys@...inx.com>
Subject: Re: [PATCH 2/4] firmware: xilinx: add new function for
 do_feature_check_call



On 4/6/22 12:55, Ronak Jain wrote:
> Add new function for sending feature check request to firmware and
> call it from zynqmp_pm_feature().
> 
> Signed-off-by: Ronak Jain <ronak.jain@...inx.com>
> ---
>   drivers/firmware/xilinx/zynqmp.c | 27 ++++++++++++++++++---------
>   1 file changed, 18 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
> index 41ca41697790..d27a3b20227b 100644
> --- a/drivers/firmware/xilinx/zynqmp.c
> +++ b/drivers/firmware/xilinx/zynqmp.c
> @@ -175,6 +175,23 @@ static noinline int do_fw_call_hvc(u64 arg0, u64 arg1, u64 arg2,
>   	return zynqmp_pm_ret_code((enum pm_ret_status)res.a0);
>   }
>   
> +static int do_feature_check_call(const u32 api_id, u32 *ret_payload)
> +{
> +	int ret;
> +	u64 smc_arg[2];
> +
> +	smc_arg[0] = PM_SIP_SVC | PM_FEATURE_CHECK;
> +	smc_arg[1] = api_id;
> +
> +	ret = do_fw_call(smc_arg[0], smc_arg[1], 0, ret_payload);
> +	if (ret)
> +		ret = -EOPNOTSUPP;
> +	else
> +		ret = ret_payload[1];
> +
> +	return ret;
> +}
> +
>   /**
>    * zynqmp_pm_feature() - Check whether given feature is supported or not and
>    *			 store supported IOCTL/QUERY ID mask
> @@ -186,7 +203,6 @@ int zynqmp_pm_feature(const u32 api_id)
>   {
>   	int ret;
>   	u32 ret_payload[PAYLOAD_ARG_CNT];
> -	u64 smc_arg[2];
>   	struct pm_api_feature_data *feature_data;
>   
>   	if (!feature_check_enabled)
> @@ -205,14 +221,7 @@ int zynqmp_pm_feature(const u32 api_id)
>   		return -ENOMEM;
>   
>   	feature_data->pm_api_id = api_id;
> -	smc_arg[0] = PM_SIP_SVC | PM_FEATURE_CHECK;
> -	smc_arg[1] = api_id;
> -
> -	ret = do_fw_call(smc_arg[0], smc_arg[1], 0, ret_payload);
> -	if (ret)
> -		ret = -EOPNOTSUPP;
> -	else
> -		ret = ret_payload[1];
> +	ret = do_feature_check_call(api_id, ret_payload);
>   
>   	feature_data->feature_status = ret;
>   	hash_add(pm_api_features_map, &feature_data->hentry, api_id);

Acked-by: Michal Simek <michal.simek@...inx.com>

Thanks,
Michal