include/linux/firmware/intel/stratix10-svc-client.h - kernel/common - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2017-2018, Intel Corporation
  */

 #ifndef __STRATIX10_SVC_CLIENT_H
 #define __STRATIX10_SVC_CLIENT_H

 /**
  * Service layer driver supports client names
  *
  * fpga: for FPGA configuration
  * rsu: for remote status update
  */
 #define SVC_CLIENT_FPGA			"fpga"
 #define SVC_CLIENT_RSU			"rsu"

 /**
  * Status of the sent command, in bit number
  *
  * SVC_COMMAND_STATUS_RECONFIG_REQUEST_OK:
  * Secure firmware accepts the request of FPGA reconfiguration.
  *
  * SVC_STATUS_RECONFIG_BUFFER_SUBMITTED:
  * Service client successfully submits FPGA configuration
  * data buffer to secure firmware.
  *
  * SVC_COMMAND_STATUS_RECONFIG_BUFFER_DONE:
  * Secure firmware completes data process, ready to accept the
  * next WRITE transaction.
  *
  * SVC_COMMAND_STATUS_RECONFIG_COMPLETED:
  * Secure firmware completes FPGA configuration successfully, FPGA should
  * be in user mode.
  *
  * SVC_COMMAND_STATUS_RECONFIG_BUSY:
  * FPGA configuration is still in process.
  *
  * SVC_COMMAND_STATUS_RECONFIG_ERROR:
  * Error encountered during FPGA configuration.
  *
  * SVC_STATUS_RSU_OK:
  * Secure firmware accepts the request of remote status update (RSU).
  */
 #define SVC_STATUS_RECONFIG_REQUEST_OK		0
 #define SVC_STATUS_RECONFIG_BUFFER_SUBMITTED	1
 #define SVC_STATUS_RECONFIG_BUFFER_DONE		2
 #define SVC_STATUS_RECONFIG_COMPLETED		3
 #define SVC_STATUS_RECONFIG_BUSY		4
 #define SVC_STATUS_RECONFIG_ERROR		5
 #define SVC_STATUS_RSU_OK			6
 #define SVC_STATUS_RSU_ERROR			7
 /**
  * Flag bit for COMMAND_RECONFIG
  *
  * COMMAND_RECONFIG_FLAG_PARTIAL:
  * Set to FPGA configuration type (full or partial), the default
  * is full reconfig.
  */
 #define COMMAND_RECONFIG_FLAG_PARTIAL	0

 /**
  * Timeout settings for service clients:
  * timeout value used in Stratix10 FPGA manager driver.
  * timeout value used in RSU driver
  */
 #define SVC_RECONFIG_REQUEST_TIMEOUT_MS         100
 #define SVC_RECONFIG_BUFFER_TIMEOUT_MS          240
 #define SVC_RSU_REQUEST_TIMEOUT_MS              300

 struct stratix10_svc_chan;

 /**
  * enum stratix10_svc_command_code - supported service commands
  *
  * @COMMAND_NOOP: do 'dummy' request for integration/debug/trouble-shooting
  *
  * @COMMAND_RECONFIG: ask for FPGA configuration preparation, return status
  * is SVC_STATUS_RECONFIG_REQUEST_OK
  *
  * @COMMAND_RECONFIG_DATA_SUBMIT: submit buffer(s) of bit-stream data for the
  * FPGA configuration, return status is SVC_STATUS_RECONFIG_BUFFER_SUBMITTED,
  * or SVC_STATUS_RECONFIG_ERROR
  *
  * @COMMAND_RECONFIG_DATA_CLAIM: check the status of the configuration, return
  * status is SVC_STATUS_RECONFIG_COMPLETED, or SVC_STATUS_RECONFIG_BUSY, or
  * SVC_STATUS_RECONFIG_ERROR
  *
  * @COMMAND_RECONFIG_STATUS: check the status of the configuration, return
  * status is SVC_STATUS_RECONFIG_COMPLETED, or  SVC_STATUS_RECONFIG_BUSY, or
  * SVC_STATUS_RECONFIG_ERROR
  *
  * @COMMAND_RSU_STATUS: request remote system update boot log, return status
  * is log data or SVC_STATUS_RSU_ERROR
  *
  * @COMMAND_RSU_UPDATE: set the offset of the bitstream to boot after reboot,
  * return status is SVC_STATUS_RSU_OK or SVC_STATUS_RSU_ERROR
  */
 enum stratix10_svc_command_code {
 	COMMAND_NOOP = 0,
 	COMMAND_RECONFIG,
 	COMMAND_RECONFIG_DATA_SUBMIT,
 	COMMAND_RECONFIG_DATA_CLAIM,
 	COMMAND_RECONFIG_STATUS,
 	COMMAND_RSU_STATUS,
 	COMMAND_RSU_UPDATE
 };

 /**
  * struct stratix10_svc_client_msg - message sent by client to service
  * @payload: starting address of data need be processed
  * @payload_length: data size in bytes
  * @command: service command
  * @arg: args to be passed via registers and not physically mapped buffers
  */
 struct stratix10_svc_client_msg {
 	void *payload;
 	size_t payload_length;
 	enum stratix10_svc_command_code command;
 	u64 arg[3];
 };

 /**
  * struct stratix10_svc_command_config_type - config type
  * @flags: flag bit for the type of FPGA configuration
  */
 struct stratix10_svc_command_config_type {
 	u32 flags;
 };

 /**
  * struct stratix10_svc_cb_data - callback data structure from service layer
  * @status: the status of sent command
  * @kaddr1: address of 1st completed data block
  * @kaddr2: address of 2nd completed data block
  * @kaddr3: address of 3rd completed data block
  */
 struct stratix10_svc_cb_data {
 	u32 status;
 	void *kaddr1;
 	void *kaddr2;
 	void *kaddr3;
 };

 /**
  * struct stratix10_svc_client - service client structure
  * @dev: the client device
  * @receive_cb: callback to provide service client the received data
  * @priv: client private data
  */
 struct stratix10_svc_client {
 	struct device *dev;
 	void (*receive_cb)(struct stratix10_svc_client *client,
 			   struct stratix10_svc_cb_data *cb_data);
 	void *priv;
 };

 /**
  * stratix10_svc_request_channel_byname() - request service channel
  * @client: identity of the client requesting the channel
  * @name: supporting client name defined above
  *
  * Return: a pointer to channel assigned to the client on success,
  * or ERR_PTR() on error.
  */
 struct stratix10_svc_chan
 *stratix10_svc_request_channel_byname(struct stratix10_svc_client *client,
 	const char *name);

 /**
  * stratix10_svc_free_channel() - free service channel.
  * @chan: service channel to be freed
  */
 void stratix10_svc_free_channel(struct stratix10_svc_chan *chan);

 /**
  * stratix10_svc_allocate_memory() - allocate the momory
  * @chan: service channel assigned to the client
  * @size: number of bytes client requests
  *
  * Service layer allocates the requested number of bytes from the memory
  * pool for the client.
  *
  * Return: the starting address of allocated memory on success, or
  * ERR_PTR() on error.
  */
 void *stratix10_svc_allocate_memory(struct stratix10_svc_chan *chan,
 				    size_t size);

 /**
  * stratix10_svc_free_memory() - free allocated memory
  * @chan: service channel assigned to the client
  * @kaddr: starting address of memory to be free back to pool
  */
 void stratix10_svc_free_memory(struct stratix10_svc_chan *chan, void *kaddr);

 /**
  * stratix10_svc_send() - send a message to the remote
  * @chan: service channel assigned to the client
  * @msg: message data to be sent, in the format of
  * struct stratix10_svc_client_msg
  *
  * Return: 0 for success, -ENOMEM or -ENOBUFS on error.
  */
 int stratix10_svc_send(struct stratix10_svc_chan *chan, void *msg);

 /**
  * intel_svc_done() - complete service request
  * @chan: service channel assigned to the client
  *
  * This function is used by service client to inform service layer that
  * client's service requests are completed, or there is an error in the
  * request process.
  */
 void stratix10_svc_done(struct stratix10_svc_chan *chan);
 #endif
	/* SPDX-License-Identifier: GPL-2.0 */
	/*
	* Copyright (C) 2017-2018, Intel Corporation
	*/

	#ifndef __STRATIX10_SVC_CLIENT_H
	#define __STRATIX10_SVC_CLIENT_H

	/**
	* Service layer driver supports client names
	*
	* fpga: for FPGA configuration
	* rsu: for remote status update
	*/
	#define SVC_CLIENT_FPGA "fpga"
	#define SVC_CLIENT_RSU "rsu"

	/**
	* Status of the sent command, in bit number
	*
	* SVC_COMMAND_STATUS_RECONFIG_REQUEST_OK:
	* Secure firmware accepts the request of FPGA reconfiguration.
	*
	* SVC_STATUS_RECONFIG_BUFFER_SUBMITTED:
	* Service client successfully submits FPGA configuration
	* data buffer to secure firmware.
	*
	* SVC_COMMAND_STATUS_RECONFIG_BUFFER_DONE:
	* Secure firmware completes data process, ready to accept the
	* next WRITE transaction.
	*
	* SVC_COMMAND_STATUS_RECONFIG_COMPLETED:
	* Secure firmware completes FPGA configuration successfully, FPGA should
	* be in user mode.
	*
	* SVC_COMMAND_STATUS_RECONFIG_BUSY:
	* FPGA configuration is still in process.
	*
	* SVC_COMMAND_STATUS_RECONFIG_ERROR:
	* Error encountered during FPGA configuration.
	*
	* SVC_STATUS_RSU_OK:
	* Secure firmware accepts the request of remote status update (RSU).
	*/
	#define SVC_STATUS_RECONFIG_REQUEST_OK 0
	#define SVC_STATUS_RECONFIG_BUFFER_SUBMITTED 1
	#define SVC_STATUS_RECONFIG_BUFFER_DONE 2
	#define SVC_STATUS_RECONFIG_COMPLETED 3
	#define SVC_STATUS_RECONFIG_BUSY 4
	#define SVC_STATUS_RECONFIG_ERROR 5
	#define SVC_STATUS_RSU_OK 6
	#define SVC_STATUS_RSU_ERROR 7
	/**
	* Flag bit for COMMAND_RECONFIG
	*
	* COMMAND_RECONFIG_FLAG_PARTIAL:
	* Set to FPGA configuration type (full or partial), the default
	* is full reconfig.
	*/
	#define COMMAND_RECONFIG_FLAG_PARTIAL 0

	/**
	* Timeout settings for service clients:
	* timeout value used in Stratix10 FPGA manager driver.
	* timeout value used in RSU driver
	*/
	#define SVC_RECONFIG_REQUEST_TIMEOUT_MS 100
	#define SVC_RECONFIG_BUFFER_TIMEOUT_MS 240
	#define SVC_RSU_REQUEST_TIMEOUT_MS 300

	struct stratix10_svc_chan;

	/**
	* enum stratix10_svc_command_code - supported service commands
	*
	* @COMMAND_NOOP: do 'dummy' request for integration/debug/trouble-shooting
	*
	* @COMMAND_RECONFIG: ask for FPGA configuration preparation, return status
	* is SVC_STATUS_RECONFIG_REQUEST_OK
	*
	* @COMMAND_RECONFIG_DATA_SUBMIT: submit buffer(s) of bit-stream data for the
	* FPGA configuration, return status is SVC_STATUS_RECONFIG_BUFFER_SUBMITTED,
	* or SVC_STATUS_RECONFIG_ERROR
	*
	* @COMMAND_RECONFIG_DATA_CLAIM: check the status of the configuration, return
	* status is SVC_STATUS_RECONFIG_COMPLETED, or SVC_STATUS_RECONFIG_BUSY, or
	* SVC_STATUS_RECONFIG_ERROR
	*
	* @COMMAND_RECONFIG_STATUS: check the status of the configuration, return
	* status is SVC_STATUS_RECONFIG_COMPLETED, or SVC_STATUS_RECONFIG_BUSY, or
	* SVC_STATUS_RECONFIG_ERROR
	*
	* @COMMAND_RSU_STATUS: request remote system update boot log, return status
	* is log data or SVC_STATUS_RSU_ERROR
	*
	* @COMMAND_RSU_UPDATE: set the offset of the bitstream to boot after reboot,
	* return status is SVC_STATUS_RSU_OK or SVC_STATUS_RSU_ERROR
	*/
	enum stratix10_svc_command_code {
	COMMAND_NOOP = 0,
	COMMAND_RECONFIG,
	COMMAND_RECONFIG_DATA_SUBMIT,
	COMMAND_RECONFIG_DATA_CLAIM,
	COMMAND_RECONFIG_STATUS,
	COMMAND_RSU_STATUS,
	COMMAND_RSU_UPDATE
	};

	/**
	* struct stratix10_svc_client_msg - message sent by client to service
	* @payload: starting address of data need be processed
	* @payload_length: data size in bytes
	* @command: service command
	* @arg: args to be passed via registers and not physically mapped buffers
	*/
	struct stratix10_svc_client_msg {
	void *payload;
	size_t payload_length;
	enum stratix10_svc_command_code command;
	u64 arg[3];
	};

	/**
	* struct stratix10_svc_command_config_type - config type
	* @flags: flag bit for the type of FPGA configuration
	*/
	struct stratix10_svc_command_config_type {
	u32 flags;
	};

	/**
	* struct stratix10_svc_cb_data - callback data structure from service layer
	* @status: the status of sent command
	* @kaddr1: address of 1st completed data block
	* @kaddr2: address of 2nd completed data block
	* @kaddr3: address of 3rd completed data block
	*/
	struct stratix10_svc_cb_data {
	u32 status;
	void *kaddr1;
	void *kaddr2;
	void *kaddr3;
	};

	/**
	* struct stratix10_svc_client - service client structure
	* @dev: the client device
	* @receive_cb: callback to provide service client the received data
	* @priv: client private data
	*/
	struct stratix10_svc_client {
	struct device *dev;
	void (receive_cb)(struct stratix10_svc_client client,
	struct stratix10_svc_cb_data *cb_data);
	void *priv;
	};

	/**
	* stratix10_svc_request_channel_byname() - request service channel
	* @client: identity of the client requesting the channel
	* @name: supporting client name defined above
	*
	* Return: a pointer to channel assigned to the client on success,
	* or ERR_PTR() on error.
	*/
	struct stratix10_svc_chan
	stratix10_svc_request_channel_byname(struct stratix10_svc_client client,
	const char *name);

	/**
	* stratix10_svc_free_channel() - free service channel.
	* @chan: service channel to be freed
	*/
	void stratix10_svc_free_channel(struct stratix10_svc_chan *chan);

	/**
	* stratix10_svc_allocate_memory() - allocate the momory
	* @chan: service channel assigned to the client
	* @size: number of bytes client requests
	*
	* Service layer allocates the requested number of bytes from the memory
	* pool for the client.
	*
	* Return: the starting address of allocated memory on success, or
	* ERR_PTR() on error.
	*/
	void stratix10_svc_allocate_memory(struct stratix10_svc_chan chan,
	size_t size);

	/**
	* stratix10_svc_free_memory() - free allocated memory
	* @chan: service channel assigned to the client
	* @kaddr: starting address of memory to be free back to pool
	*/
	void stratix10_svc_free_memory(struct stratix10_svc_chan chan, void kaddr);

	/**
	* stratix10_svc_send() - send a message to the remote
	* @chan: service channel assigned to the client
	* @msg: message data to be sent, in the format of
	* struct stratix10_svc_client_msg
	*
	* Return: 0 for success, -ENOMEM or -ENOBUFS on error.
	*/
	int stratix10_svc_send(struct stratix10_svc_chan chan, void msg);

	/**
	* intel_svc_done() - complete service request
	* @chan: service channel assigned to the client
	*
	* This function is used by service client to inform service layer that
	* client's service requests are completed, or there is an error in the
	* request process.
	*/
	void stratix10_svc_done(struct stratix10_svc_chan *chan);
	#endif