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/* 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_STATUS_OK:
* Secure firmware accepts the request issued by one of service clients.
*
* SVC_STATUS_BUFFER_SUBMITTED:
* Service client successfully submits data buffer to secure firmware.
*
* SVC_STATUS_BUFFER_DONE:
* Secure firmware completes data process, ready to accept the
* next WRITE transaction.
*
* SVC_STATUS_COMPLETED:
* Secure firmware completes service request successfully. In case of
* FPGA configuration, FPGA should be in user mode.
*
* SVC_COMMAND_STATUS_BUSY:
* Service request is still in process.
*
* SVC_COMMAND_STATUS_ERROR:
* Error encountered during the process of the service request.
*
* SVC_STATUS_NO_SUPPORT:
* Secure firmware doesn't support requested features such as RSU retry
* or RSU notify.
*/
#define SVC_STATUS_OK 0
#define SVC_STATUS_BUFFER_SUBMITTED 1
#define SVC_STATUS_BUFFER_DONE 2
#define SVC_STATUS_COMPLETED 3
#define SVC_STATUS_BUSY 4
#define SVC_STATUS_ERROR 5
#define SVC_STATUS_NO_SUPPORT 6
/*
* Flag bit for COMMAND_RECONFIG
*
* COMMAND_RECONFIG_FLAG_PARTIAL:
* Set to FPGA configuration type (full or partial).
*/
#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 300
#define SVC_RECONFIG_BUFFER_TIMEOUT_MS 720
#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_OK
*
* @COMMAND_RECONFIG_DATA_SUBMIT: submit buffer(s) of bit-stream data for the
* FPGA configuration, return status is SVC_STATUS_SUBMITTED or SVC_STATUS_ERROR
*
* @COMMAND_RECONFIG_DATA_CLAIM: check the status of the configuration, return
* status is SVC_STATUS_COMPLETED, or SVC_STATUS_BUSY, or SVC_STATUS_ERROR
*
* @COMMAND_RECONFIG_STATUS: check the status of the configuration, return
* status is SVC_STATUS_COMPLETED, or SVC_STATUS_BUSY, or SVC_STATUS_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_OK or SVC_STATUS_ERROR
*
* @COMMAND_RSU_NOTIFY: report the status of hard processor system
* software to firmware, return status is SVC_STATUS_OK or
* SVC_STATUS_ERROR
*
* @COMMAND_RSU_RETRY: query firmware for the current image's retry counter,
* return status is SVC_STATUS_OK or SVC_STATUS_ERROR
*
* @COMMAND_RSU_MAX_RETRY: query firmware for the max retry value,
* return status is SVC_STATUS_OK or SVC_STATUS_ERROR
*
* @COMMAND_RSU_DCMF_VERSION: query firmware for the DCMF version, return status
* is SVC_STATUS_OK or SVC_STATUS_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,
COMMAND_RSU_NOTIFY,
COMMAND_RSU_RETRY,
COMMAND_RSU_MAX_RETRY,
COMMAND_RSU_DCMF_VERSION,
};
/**
* 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);
/**
* stratix10_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
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