linux-kernel - Re: [PATCH v11 5/6] firmware: xilinx: Add RPU configuration APIs

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Message-ID: <add472c4-a555-e8a8-94f4-bcf707f32af1@amd.com>
Date:   Fri, 25 Nov 2022 10:25:22 +0100
From:   Michal Simek <michal.simek@....com>
To:     Tanmay Shah <tanmay.shah@....com>, <andersson@...nel.org>,
        <mathieu.poirier@...aro.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>
CC:     <bill.mills@...aro.org>, <linux-remoteproc@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Ben Levinsky <ben.levinsky@....com>
Subject: Re: [PATCH v11 5/6] firmware: xilinx: Add RPU configuration APIs



On 11/15/22 00:39, Tanmay Shah wrote:
> From: Ben Levinsky <ben.levinsky@....com>
> 
> This patch adds APIs to access to configure RPU and its
> processor-specific memory.
> 
> That is query the run-time mode of RPU as either split or lockstep as well
> as API to set this mode. In addition add APIs to access configuration of
> the RPUs' tightly coupled memory (TCM).
> 
> Signed-off-by: Ben Levinsky <ben.levinsky@....com>
> Signed-off-by: Tanmay Shah <tanmay.shah@....com>
> ---
> 
> Changes in v11:
>    - Rebase on latest rproc-next branch and resolve merge conflicts
> 
> Changes in v10:
>    - None
> 
> Changes in v9:
>    - None
> 
> Changes in v8:
>    - None
> 
> Changes in v7:
>    - None
> 
> Changes in v6:
>    - None
> 
> Changes in v5:
>    - None
> 
> Changes in v4:
>    - None
> 
> Changes in v3:
>    - Add missing function argument documentation
> 
>   drivers/firmware/xilinx/zynqmp.c     | 62 ++++++++++++++++++++++++++++
>   include/linux/firmware/xlnx-zynqmp.h | 18 ++++++++
>   2 files changed, 80 insertions(+)
> 
> diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
> index 1865e43ed7e7..e4981e7f3500 100644
> --- a/drivers/firmware/xilinx/zynqmp.c
> +++ b/drivers/firmware/xilinx/zynqmp.c
> @@ -1159,6 +1159,68 @@ int zynqmp_pm_release_node(const u32 node)
>   }
>   EXPORT_SYMBOL_GPL(zynqmp_pm_release_node);
>   
> +/**
> + * zynqmp_pm_get_rpu_mode() - Get RPU mode
> + * @node_id:	Node ID of the device
> + * @rpu_mode:	return by reference value
> + *		either split or lockstep
> + *
> + * Return:	return 0 on success or error+reason.
> + *		if success, then  rpu_mode will be set
> + *		to current rpu mode.
> + */
> +int zynqmp_pm_get_rpu_mode(u32 node_id, enum rpu_oper_mode *rpu_mode)
> +{
> +	u32 ret_payload[PAYLOAD_ARG_CNT];
> +	int ret;
> +
> +	ret = zynqmp_pm_invoke_fn(PM_IOCTL, node_id,
> +				  IOCTL_GET_RPU_OPER_MODE, 0, 0, ret_payload);
> +
> +	/* only set rpu_mode if no error */
> +	if (ret == XST_PM_SUCCESS)
> +		*rpu_mode = ret_payload[0];
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(zynqmp_pm_get_rpu_mode);
> +
> +/**
> + * zynqmp_pm_set_rpu_mode() - Set RPU mode
> + * @node_id:	Node ID of the device
> + * @rpu_mode:	Argument 1 to requested IOCTL call. either split or lockstep
> + *
> + *		This function is used to set RPU mode to split or
> + *		lockstep
> + *
> + * Return:	Returns status, either success or error+reason
> + */
> +int zynqmp_pm_set_rpu_mode(u32 node_id, enum rpu_oper_mode rpu_mode)
> +{
> +	return zynqmp_pm_invoke_fn(PM_IOCTL, node_id,
> +				   IOCTL_SET_RPU_OPER_MODE, (u32)rpu_mode,
> +				   0, NULL);
> +}
> +EXPORT_SYMBOL_GPL(zynqmp_pm_set_rpu_mode);
> +
> +/**
> + * zynqmp_pm_set_tcm_config - configure TCM
> + * @node_id:	Firmware specific TCM subsystem ID
> + * @tcm_mode:	Argument 1 to requested IOCTL call
> + *              either PM_RPU_TCM_COMB or PM_RPU_TCM_SPLIT
> + *
> + * This function is used to set RPU mode to split or combined
> + *
> + * Return: status: 0 for success, else failure
> + */
> +int zynqmp_pm_set_tcm_config(u32 node_id, enum rpu_tcm_comb tcm_mode)
> +{
> +	return zynqmp_pm_invoke_fn(PM_IOCTL, node_id,
> +				   IOCTL_TCM_COMB_CONFIG, (u32)tcm_mode, 0,
> +				   NULL);
> +}
> +EXPORT_SYMBOL_GPL(zynqmp_pm_set_tcm_config);
> +
>   /**
>    * zynqmp_pm_force_pwrdwn - PM call to request for another PU or subsystem to
>    *             be powered down forcefully
> diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
> index ad3f2bd0c470..cf92e739fa3b 100644
> --- a/include/linux/firmware/xlnx-zynqmp.h
> +++ b/include/linux/firmware/xlnx-zynqmp.h
> @@ -530,6 +530,9 @@ int zynqmp_pm_request_wake(const u32 node,
>   			   const bool set_addr,
>   			   const u64 address,
>   			   const enum zynqmp_pm_request_ack ack);
> +int zynqmp_pm_get_rpu_mode(u32 node_id, enum rpu_oper_mode *rpu_mode);
> +int zynqmp_pm_set_rpu_mode(u32 node_id, u32 arg1);
> +int zynqmp_pm_set_tcm_config(u32 node_id, u32 arg1);
>   int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value);
>   int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config,
>   			     u32 value);
> @@ -818,6 +821,21 @@ static inline int zynqmp_pm_request_wake(const u32 node,
>   	return -ENODEV;
>   }
>   
> +static inline int zynqmp_pm_get_rpu_mode(u32 node_id, enum rpu_oper_mode *rpu_mode)
> +{
> +	return -ENODEV;
> +}
> +
> +static inline int zynqmp_pm_set_rpu_mode(u32 node_id, u32 arg1)
> +{
> +	return -ENODEV;
> +}
> +
> +static inline int zynqmp_pm_set_tcm_config(u32 node_id, u32 arg1)
> +{
> +	return -ENODEV;
> +}
> +
>   static inline int zynqmp_pm_set_sd_config(u32 node,
>   					  enum pm_sd_config_type config,
>   					  u32 value)

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

Thanks,
Michal