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Subject: Re: [PATCH] firmware: ti_sci: Add support for processor control
To:     Suman Anna <s-anna@ti.com>, Tero Kristo <t-kristo@ti.com>,
        Nishanth Menon <nm@ti.com>,
        Santosh Shilimkar <ssantosh@kernel.org>
CC:     <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>
References: <20190605223334.30428-1-s-anna@ti.com>
From:   Lokesh Vutla <lokeshvutla@ti.com>
Message-ID: <af0da0f1-5381-d212-74a0-9ab19730dc55@ti.com>
Date:   Thu, 6 Jun 2019 09:34:03 +0530
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On 06/06/19 4:03 AM, Suman Anna wrote:
> Texas Instrument's System Control Interface (TI-SCI) Message Protocol
> is used in Texas Instrument's System on Chip (SoC) such as those
> in K3 family AM654 SoC to communicate between various compute
> processors with a central system controller entity.
> 
> The system controller provides various services including the control
> of other compute processors within the SoC. Extend the TI-SCI protocol
> support to add various TI-SCI commands to invoke services associated
> with power and reset control, and boot vector management of the
> various compute processors from the Linux kernel.
> 
> Signed-off-by: Suman Anna <s-anna@ti.com>

Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>

Thanks and regards,
Lokesh

> ---
> Hi Santosh, Nishanth, Tero,
> 
> Appreciate it if this patch can be picked up for the 5.3 merge window.
> This is a dependency patch for my various remoteproc drivers on TI K3
> SoCs. Patch is on top of v5.2-rc1.
> 
> regards
> Suman
> 
>  drivers/firmware/ti_sci.c              | 350 +++++++++++++++++++++++++
>  drivers/firmware/ti_sci.h              | 135 ++++++++++
>  include/linux/soc/ti/ti_sci_protocol.h |  31 +++
>  3 files changed, 516 insertions(+)
> 
> diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
> index 36ce11a67235..596acad89e86 100644
> --- a/drivers/firmware/ti_sci.c
> +++ b/drivers/firmware/ti_sci.c
> @@ -2004,6 +2004,348 @@ static int ti_sci_cmd_free_event_map(const struct ti_sci_handle *handle,
>  			       ia_id, vint, global_event, vint_status_bit, 0);
>  }
>  
> +/**
> + * ti_sci_cmd_proc_request() - Command to request a physical processor control
> + * @handle:	Pointer to TI SCI handle
> + * @proc_id:	Processor ID this request is for
> + *
> + * Return: 0 if all went well, else returns appropriate error value.
> + */
> +static int ti_sci_cmd_proc_request(const struct ti_sci_handle *handle,
> +				   u8 proc_id)
> +{
> +	struct ti_sci_msg_req_proc_request *req;
> +	struct ti_sci_msg_hdr *resp;
> +	struct ti_sci_info *info;
> +	struct ti_sci_xfer *xfer;
> +	struct device *dev;
> +	int ret = 0;
> +
> +	if (!handle)
> +		return -EINVAL;
> +	if (IS_ERR(handle))
> +		return PTR_ERR(handle);
> +
> +	info = handle_to_ti_sci_info(handle);
> +	dev = info->dev;
> +
> +	xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_REQUEST,
> +				   TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
> +				   sizeof(*req), sizeof(*resp));
> +	if (IS_ERR(xfer)) {
> +		ret = PTR_ERR(xfer);
> +		dev_err(dev, "Message alloc failed(%d)\n", ret);
> +		return ret;
> +	}
> +	req = (struct ti_sci_msg_req_proc_request *)xfer->xfer_buf;
> +	req->processor_id = proc_id;
> +
> +	ret = ti_sci_do_xfer(info, xfer);
> +	if (ret) {
> +		dev_err(dev, "Mbox send fail %d\n", ret);
> +		goto fail;
> +	}
> +
> +	resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf;
> +
> +	ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV;
> +
> +fail:
> +	ti_sci_put_one_xfer(&info->minfo, xfer);
> +
> +	return ret;
> +}
> +
> +/**
> + * ti_sci_cmd_proc_release() - Command to release a physical processor control
> + * @handle:	Pointer to TI SCI handle
> + * @proc_id:	Processor ID this request is for
> + *
> + * Return: 0 if all went well, else returns appropriate error value.
> + */
> +static int ti_sci_cmd_proc_release(const struct ti_sci_handle *handle,
> +				   u8 proc_id)
> +{
> +	struct ti_sci_msg_req_proc_release *req;
> +	struct ti_sci_msg_hdr *resp;
> +	struct ti_sci_info *info;
> +	struct ti_sci_xfer *xfer;
> +	struct device *dev;
> +	int ret = 0;
> +
> +	if (!handle)
> +		return -EINVAL;
> +	if (IS_ERR(handle))
> +		return PTR_ERR(handle);
> +
> +	info = handle_to_ti_sci_info(handle);
> +	dev = info->dev;
> +
> +	xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_RELEASE,
> +				   TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
> +				   sizeof(*req), sizeof(*resp));
> +	if (IS_ERR(xfer)) {
> +		ret = PTR_ERR(xfer);
> +		dev_err(dev, "Message alloc failed(%d)\n", ret);
> +		return ret;
> +	}
> +	req = (struct ti_sci_msg_req_proc_release *)xfer->xfer_buf;
> +	req->processor_id = proc_id;
> +
> +	ret = ti_sci_do_xfer(info, xfer);
> +	if (ret) {
> +		dev_err(dev, "Mbox send fail %d\n", ret);
> +		goto fail;
> +	}
> +
> +	resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf;
> +
> +	ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV;
> +
> +fail:
> +	ti_sci_put_one_xfer(&info->minfo, xfer);
> +
> +	return ret;
> +}
> +
> +/**
> + * ti_sci_cmd_proc_handover() - Command to handover a physical processor
> + *				control to a host in the processor's access
> + *				control list.
> + * @handle:	Pointer to TI SCI handle
> + * @proc_id:	Processor ID this request is for
> + * @host_id:	Host ID to get the control of the processor
> + *
> + * Return: 0 if all went well, else returns appropriate error value.
> + */
> +static int ti_sci_cmd_proc_handover(const struct ti_sci_handle *handle,
> +				    u8 proc_id, u8 host_id)
> +{
> +	struct ti_sci_msg_req_proc_handover *req;
> +	struct ti_sci_msg_hdr *resp;
> +	struct ti_sci_info *info;
> +	struct ti_sci_xfer *xfer;
> +	struct device *dev;
> +	int ret = 0;
> +
> +	if (!handle)
> +		return -EINVAL;
> +	if (IS_ERR(handle))
> +		return PTR_ERR(handle);
> +
> +	info = handle_to_ti_sci_info(handle);
> +	dev = info->dev;
> +
> +	xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_PROC_HANDOVER,
> +				   TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
> +				   sizeof(*req), sizeof(*resp));
> +	if (IS_ERR(xfer)) {
> +		ret = PTR_ERR(xfer);
> +		dev_err(dev, "Message alloc failed(%d)\n", ret);
> +		return ret;
> +	}
> +	req = (struct ti_sci_msg_req_proc_handover *)xfer->xfer_buf;
> +	req->processor_id = proc_id;
> +	req->host_id = host_id;
> +
> +	ret = ti_sci_do_xfer(info, xfer);
> +	if (ret) {
> +		dev_err(dev, "Mbox send fail %d\n", ret);
> +		goto fail;
> +	}
> +
> +	resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf;
> +
> +	ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV;
> +
> +fail:
> +	ti_sci_put_one_xfer(&info->minfo, xfer);
> +
> +	return ret;
> +}
> +
> +/**
> + * ti_sci_cmd_proc_set_config() - Command to set the processor boot
> + *				    configuration flags
> + * @handle:		Pointer to TI SCI handle
> + * @proc_id:		Processor ID this request is for
> + * @config_flags_set:	Configuration flags to be set
> + * @config_flags_clear:	Configuration flags to be cleared.
> + *
> + * Return: 0 if all went well, else returns appropriate error value.
> + */
> +static int ti_sci_cmd_proc_set_config(const struct ti_sci_handle *handle,
> +				      u8 proc_id, u64 bootvector,
> +				      u32 config_flags_set,
> +				      u32 config_flags_clear)
> +{
> +	struct ti_sci_msg_req_set_config *req;
> +	struct ti_sci_msg_hdr *resp;
> +	struct ti_sci_info *info;
> +	struct ti_sci_xfer *xfer;
> +	struct device *dev;
> +	int ret = 0;
> +
> +	if (!handle)
> +		return -EINVAL;
> +	if (IS_ERR(handle))
> +		return PTR_ERR(handle);
> +
> +	info = handle_to_ti_sci_info(handle);
> +	dev = info->dev;
> +
> +	xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CONFIG,
> +				   TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
> +				   sizeof(*req), sizeof(*resp));
> +	if (IS_ERR(xfer)) {
> +		ret = PTR_ERR(xfer);
> +		dev_err(dev, "Message alloc failed(%d)\n", ret);
> +		return ret;
> +	}
> +	req = (struct ti_sci_msg_req_set_config *)xfer->xfer_buf;
> +	req->processor_id = proc_id;
> +	req->bootvector_low = bootvector & TI_SCI_ADDR_LOW_MASK;
> +	req->bootvector_high = (bootvector & TI_SCI_ADDR_HIGH_MASK) >>
> +				TI_SCI_ADDR_HIGH_SHIFT;
> +	req->config_flags_set = config_flags_set;
> +	req->config_flags_clear = config_flags_clear;
> +
> +	ret = ti_sci_do_xfer(info, xfer);
> +	if (ret) {
> +		dev_err(dev, "Mbox send fail %d\n", ret);
> +		goto fail;
> +	}
> +
> +	resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf;
> +
> +	ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV;
> +
> +fail:
> +	ti_sci_put_one_xfer(&info->minfo, xfer);
> +
> +	return ret;
> +}
> +
> +/**
> + * ti_sci_cmd_proc_set_control() - Command to set the processor boot
> + *				     control flags
> + * @handle:			Pointer to TI SCI handle
> + * @proc_id:			Processor ID this request is for
> + * @control_flags_set:		Control flags to be set
> + * @control_flags_clear:	Control flags to be cleared
> + *
> + * Return: 0 if all went well, else returns appropriate error value.
> + */
> +static int ti_sci_cmd_proc_set_control(const struct ti_sci_handle *handle,
> +				       u8 proc_id, u32 control_flags_set,
> +				       u32 control_flags_clear)
> +{
> +	struct ti_sci_msg_req_set_ctrl *req;
> +	struct ti_sci_msg_hdr *resp;
> +	struct ti_sci_info *info;
> +	struct ti_sci_xfer *xfer;
> +	struct device *dev;
> +	int ret = 0;
> +
> +	if (!handle)
> +		return -EINVAL;
> +	if (IS_ERR(handle))
> +		return PTR_ERR(handle);
> +
> +	info = handle_to_ti_sci_info(handle);
> +	dev = info->dev;
> +
> +	xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_SET_CTRL,
> +				   TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
> +				   sizeof(*req), sizeof(*resp));
> +	if (IS_ERR(xfer)) {
> +		ret = PTR_ERR(xfer);
> +		dev_err(dev, "Message alloc failed(%d)\n", ret);
> +		return ret;
> +	}
> +	req = (struct ti_sci_msg_req_set_ctrl *)xfer->xfer_buf;
> +	req->processor_id = proc_id;
> +	req->control_flags_set = control_flags_set;
> +	req->control_flags_clear = control_flags_clear;
> +
> +	ret = ti_sci_do_xfer(info, xfer);
> +	if (ret) {
> +		dev_err(dev, "Mbox send fail %d\n", ret);
> +		goto fail;
> +	}
> +
> +	resp = (struct ti_sci_msg_hdr *)xfer->tx_message.buf;
> +
> +	ret = ti_sci_is_response_ack(resp) ? 0 : -ENODEV;
> +
> +fail:
> +	ti_sci_put_one_xfer(&info->minfo, xfer);
> +
> +	return ret;
> +}
> +
> +/**
> + * ti_sci_cmd_get_boot_status() - Command to get the processor boot status
> + * @handle:	Pointer to TI SCI handle
> + * @proc_id:	Processor ID this request is for
> + *
> + * Return: 0 if all went well, else returns appropriate error value.
> + */
> +static int ti_sci_cmd_proc_get_status(const struct ti_sci_handle *handle,
> +				      u8 proc_id, u64 *bv, u32 *cfg_flags,
> +				      u32 *ctrl_flags, u32 *sts_flags)
> +{
> +	struct ti_sci_msg_resp_get_status *resp;
> +	struct ti_sci_msg_req_get_status *req;
> +	struct ti_sci_info *info;
> +	struct ti_sci_xfer *xfer;
> +	struct device *dev;
> +	int ret = 0;
> +
> +	if (!handle)
> +		return -EINVAL;
> +	if (IS_ERR(handle))
> +		return PTR_ERR(handle);
> +
> +	info = handle_to_ti_sci_info(handle);
> +	dev = info->dev;
> +
> +	xfer = ti_sci_get_one_xfer(info, TI_SCI_MSG_GET_STATUS,
> +				   TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
> +				   sizeof(*req), sizeof(*resp));
> +	if (IS_ERR(xfer)) {
> +		ret = PTR_ERR(xfer);
> +		dev_err(dev, "Message alloc failed(%d)\n", ret);
> +		return ret;
> +	}
> +	req = (struct ti_sci_msg_req_get_status *)xfer->xfer_buf;
> +	req->processor_id = proc_id;
> +
> +	ret = ti_sci_do_xfer(info, xfer);
> +	if (ret) {
> +		dev_err(dev, "Mbox send fail %d\n", ret);
> +		goto fail;
> +	}
> +
> +	resp = (struct ti_sci_msg_resp_get_status *)xfer->tx_message.buf;
> +
> +	if (!ti_sci_is_response_ack(resp)) {
> +		ret = -ENODEV;
> +	} else {
> +		*bv = (resp->bootvector_low & TI_SCI_ADDR_LOW_MASK) |
> +		      (((u64)resp->bootvector_high << TI_SCI_ADDR_HIGH_SHIFT) &
> +		       TI_SCI_ADDR_HIGH_MASK);
> +		*cfg_flags = resp->config_flags;
> +		*ctrl_flags = resp->control_flags;
> +		*sts_flags = resp->status_flags;
> +	}
> +
> +fail:
> +	ti_sci_put_one_xfer(&info->minfo, xfer);
> +
> +	return ret;
> +}
> +
>  /*
>   * ti_sci_setup_ops() - Setup the operations structures
>   * @info:	pointer to TISCI pointer
> @@ -2016,6 +2358,7 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
>  	struct ti_sci_clk_ops *cops = &ops->clk_ops;
>  	struct ti_sci_rm_core_ops *rm_core_ops = &ops->rm_core_ops;
>  	struct ti_sci_rm_irq_ops *iops = &ops->rm_irq_ops;
> +	struct ti_sci_proc_ops *pops = &ops->proc_ops;
>  
>  	core_ops->reboot_device = ti_sci_cmd_core_reboot;
>  
> @@ -2055,6 +2398,13 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
>  	iops->set_event_map = ti_sci_cmd_set_event_map;
>  	iops->free_irq = ti_sci_cmd_free_irq;
>  	iops->free_event_map = ti_sci_cmd_free_event_map;
> +
> +	pops->request = ti_sci_cmd_proc_request;
> +	pops->release = ti_sci_cmd_proc_release;
> +	pops->handover = ti_sci_cmd_proc_handover;
> +	pops->set_config = ti_sci_cmd_proc_set_config;
> +	pops->set_control = ti_sci_cmd_proc_set_control;
> +	pops->get_status = ti_sci_cmd_proc_get_status;
>  }
>  
>  /**
> diff --git a/drivers/firmware/ti_sci.h b/drivers/firmware/ti_sci.h
> index 4983827151bf..557b17fea902 100644
> --- a/drivers/firmware/ti_sci.h
> +++ b/drivers/firmware/ti_sci.h
> @@ -42,6 +42,14 @@
>  #define TI_SCI_MSG_SET_IRQ		0x1000
>  #define TI_SCI_MSG_FREE_IRQ		0x1001
>  
> +/* Processor Control requests */
> +#define TI_SCI_MSG_PROC_REQUEST		0xc000
> +#define TI_SCI_MSG_PROC_RELEASE		0xc001
> +#define TI_SCI_MSG_PROC_HANDOVER	0xc005
> +#define TI_SCI_MSG_SET_CONFIG		0xc100
> +#define TI_SCI_MSG_SET_CTRL		0xc101
> +#define TI_SCI_MSG_GET_STATUS		0xc400
> +
>  /**
>   * struct ti_sci_msg_hdr - Generic Message Header for All messages and responses
>   * @type:	Type of messages: One of TI_SCI_MSG* values
> @@ -563,4 +571,131 @@ struct ti_sci_msg_req_manage_irq {
>  	u8 secondary_host;
>  } __packed;
>  
> +/**
> + * struct ti_sci_msg_req_proc_request - Request a processor
> + * @hdr:		Generic Header
> + * @processor_id:	ID of processor being requested
> + *
> + * Request type is TI_SCI_MSG_PROC_REQUEST, response is a generic ACK/NACK
> + * message.
> + */
> +struct ti_sci_msg_req_proc_request {
> +	struct ti_sci_msg_hdr hdr;
> +	u8 processor_id;
> +} __packed;
> +
> +/**
> + * struct ti_sci_msg_req_proc_release - Release a processor
> + * @hdr:		Generic Header
> + * @processor_id:	ID of processor being released
> + *
> + * Request type is TI_SCI_MSG_PROC_RELEASE, response is a generic ACK/NACK
> + * message.
> + */
> +struct ti_sci_msg_req_proc_release {
> +	struct ti_sci_msg_hdr hdr;
> +	u8 processor_id;
> +} __packed;
> +
> +/**
> + * struct ti_sci_msg_req_proc_handover - Handover a processor to a host
> + * @hdr:		Generic Header
> + * @processor_id:	ID of processor being handed over
> + * @host_id:		Host ID the control needs to be transferred to
> + *
> + * Request type is TI_SCI_MSG_PROC_HANDOVER, response is a generic ACK/NACK
> + * message.
> + */
> +struct ti_sci_msg_req_proc_handover {
> +	struct ti_sci_msg_hdr hdr;
> +	u8 processor_id;
> +	u8 host_id;
> +} __packed;
> +
> +/* Boot Vector masks */
> +#define TI_SCI_ADDR_LOW_MASK			GENMASK_ULL(31, 0)
> +#define TI_SCI_ADDR_HIGH_MASK			GENMASK_ULL(63, 32)
> +#define TI_SCI_ADDR_HIGH_SHIFT			32
> +
> +/**
> + * struct ti_sci_msg_req_set_config - Set Processor boot configuration
> + * @hdr:		Generic Header
> + * @processor_id:	ID of processor being configured
> + * @bootvector_low:	Lower 32 bit address (Little Endian) of boot vector
> + * @bootvector_high:	Higher 32 bit address (Little Endian) of boot vector
> + * @config_flags_set:	Optional Processor specific Config Flags to set.
> + *			Setting a bit here implies the corresponding mode
> + *			will be set
> + * @config_flags_clear:	Optional Processor specific Config Flags to clear.
> + *			Setting a bit here implies the corresponding mode
> + *			will be cleared
> + *
> + * Request type is TI_SCI_MSG_PROC_HANDOVER, response is a generic ACK/NACK
> + * message.
> + */
> +struct ti_sci_msg_req_set_config {
> +	struct ti_sci_msg_hdr hdr;
> +	u8 processor_id;
> +	u32 bootvector_low;
> +	u32 bootvector_high;
> +	u32 config_flags_set;
> +	u32 config_flags_clear;
> +} __packed;
> +
> +/**
> + * struct ti_sci_msg_req_set_ctrl - Set Processor boot control flags
> + * @hdr:		Generic Header
> + * @processor_id:	ID of processor being configured
> + * @control_flags_set:	Optional Processor specific Control Flags to set.
> + *			Setting a bit here implies the corresponding mode
> + *			will be set
> + * @control_flags_clear:Optional Processor specific Control Flags to clear.
> + *			Setting a bit here implies the corresponding mode
> + *			will be cleared
> + *
> + * Request type is TI_SCI_MSG_SET_CTRL, response is a generic ACK/NACK
> + * message.
> + */
> +struct ti_sci_msg_req_set_ctrl {
> +	struct ti_sci_msg_hdr hdr;
> +	u8 processor_id;
> +	u32 control_flags_set;
> +	u32 control_flags_clear;
> +} __packed;
> +
> +/**
> + * struct ti_sci_msg_req_get_status - Processor boot status request
> + * @hdr:		Generic Header
> + * @processor_id:	ID of processor whose status is being requested
> + *
> + * Request type is TI_SCI_MSG_GET_STATUS, response is an appropriate
> + * message, or NACK in case of inability to satisfy request.
> + */
> +struct ti_sci_msg_req_get_status {
> +	struct ti_sci_msg_hdr hdr;
> +	u8 processor_id;
> +} __packed;
> +
> +/**
> + * struct ti_sci_msg_resp_get_status - Processor boot status response
> + * @hdr:		Generic Header
> + * @processor_id:	ID of processor whose status is returned
> + * @bootvector_low:	Lower 32 bit address (Little Endian) of boot vector
> + * @bootvector_high:	Higher 32 bit address (Little Endian) of boot vector
> + * @config_flags:	Optional Processor specific Config Flags set currently
> + * @control_flags:	Optional Processor specific Control Flags set currently
> + * @status_flags:	Optional Processor specific Status Flags set currently
> + *
> + * Response structure to a TI_SCI_MSG_GET_STATUS request.
> + */
> +struct ti_sci_msg_resp_get_status {
> +	struct ti_sci_msg_hdr hdr;
> +	u8 processor_id;
> +	u32 bootvector_low;
> +	u32 bootvector_high;
> +	u32 config_flags;
> +	u32 control_flags;
> +	u32 status_flags;
> +} __packed;
> +
>  #endif /* __TI_SCI_H */
> diff --git a/include/linux/soc/ti/ti_sci_protocol.h b/include/linux/soc/ti/ti_sci_protocol.h
> index 568722a041bf..0e3cd739add5 100644
> --- a/include/linux/soc/ti/ti_sci_protocol.h
> +++ b/include/linux/soc/ti/ti_sci_protocol.h
> @@ -241,12 +241,42 @@ struct ti_sci_rm_irq_ops {
>  			      u16 global_event, u8 vint_status_bit);
>  };
>  
> +/**
> + * struct ti_sci_proc_ops - Processor Control operations
> + * @request:	Request to control a physical processor. The requesting host
> + *		should be in the processor access list
> + * @release:	Relinquish a physical processor control
> + * @handover:	Handover a physical processor control to another host
> + *		in the permitted list
> + * @set_config:	Set base configuration of a processor
> + * @set_control: Setup limited control flags in specific cases
> + * @get_status: Get the state of physical processor
> + *
> + * NOTE: The following paramteres are generic in nature for all these ops,
> + * -handle:	Pointer to TI SCI handle as retrieved by *ti_sci_get_handle
> + * -pid:	Processor ID
> + * -hid:	Host ID
> + */
> +struct ti_sci_proc_ops {
> +	int (*request)(const struct ti_sci_handle *handle, u8 pid);
> +	int (*release)(const struct ti_sci_handle *handle, u8 pid);
> +	int (*handover)(const struct ti_sci_handle *handle, u8 pid, u8 hid);
> +	int (*set_config)(const struct ti_sci_handle *handle, u8 pid,
> +			  u64 boot_vector, u32 cfg_set, u32 cfg_clr);
> +	int (*set_control)(const struct ti_sci_handle *handle, u8 pid,
> +			   u32 ctrl_set, u32 ctrl_clr);
> +	int (*get_status)(const struct ti_sci_handle *handle, u8 pid,
> +			  u64 *boot_vector, u32 *cfg_flags, u32 *ctrl_flags,
> +			  u32 *status_flags);
> +};
> +
>  /**
>   * struct ti_sci_ops - Function support for TI SCI
>   * @dev_ops:	Device specific operations
>   * @clk_ops:	Clock specific operations
>   * @rm_core_ops:	Resource management core operations.
>   * @rm_irq_ops:		IRQ management specific operations
> + * @proc_ops:	Processor Control specific operations
>   */
>  struct ti_sci_ops {
>  	struct ti_sci_core_ops core_ops;
> @@ -254,6 +284,7 @@ struct ti_sci_ops {
>  	struct ti_sci_clk_ops clk_ops;
>  	struct ti_sci_rm_core_ops rm_core_ops;
>  	struct ti_sci_rm_irq_ops rm_irq_ops;
> +	struct ti_sci_proc_ops proc_ops;
>  };
>  
>  /**
>