/* SPDX-License-Identifier: GPL-2.0-only */
/*
* ISHTP bus definitions
*
* Copyright ( c ) 2014 - 2016 , Intel Corporation .
*/
#ifndef _LINUX_ISHTP_CL_BUS_H
#define _LINUX_ISHTP_CL_BUS_H
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/intel-ish-client-if .h>
struct ishtp_cl;
struct ishtp_cl_device;
struct ishtp_device;
struct ishtp_msg_hdr;
/**
* struct ishtp_cl_device - ISHTP device handle
* @ dev : device pointer
* @ ishtp_dev : pointer to ishtp device structure to primarily to access
* hw device operation callbacks and properties
* @ fw_client : fw_client pointer to get fw information like protocol name
* max message length etc .
* @ device_link : Link to next client in the list on a bus
* @ event_work : Used to schedule rx event for client
* @ driver_data : Storage driver private data
* @ reference_count : Used for get / put device
* @ event_cb : Callback to driver to send events
*
* An ishtp_cl_device pointer is returned from ishtp_add_device ( )
* and links ISHTP bus clients to their actual host client pointer .
* Drivers for ISHTP devices will get an ishtp_cl_device pointer
* when being probed and shall use it for doing bus I / O .
*/
struct ishtp_cl_device {
struct device dev;
struct ishtp_device *ishtp_dev;
struct ishtp_fw_client *fw_client;
struct list_head device_link;
struct work_struct event_work;
void *driver_data;
int reference_count;
void (*event_cb)(struct ishtp_cl_device *device);
};
int ishtp_bus_new_client(struct ishtp_device *dev);
int ishtp_cl_device_bind(struct ishtp_cl *cl);
void ishtp_cl_bus_rx_event(struct ishtp_cl_device *device);
/* Write a multi-fragment message */
int ishtp_send_msg(struct ishtp_device *dev,
struct ishtp_msg_hdr *hdr, void *msg,
void (*ipc_send_compl)(void *),
void *ipc_send_compl_prm);
/* Write a single-fragment message */
int ishtp_write_message(struct ishtp_device *dev,
struct ishtp_msg_hdr *hdr,
void *buf);
/* Use DMA to send/receive messages */
int ishtp_use_dma_transfer(void );
/* Exported functions */
void ishtp_bus_remove_all_clients(struct ishtp_device *ishtp_dev,
bool warm_reset);
void ishtp_recv(struct ishtp_device *dev);
void ishtp_reset_handler(struct ishtp_device *dev);
void ishtp_reset_compl_handler(struct ishtp_device *dev);
int ishtp_fw_cl_by_uuid(struct ishtp_device *dev, const guid_t *cuuid);
#endif /* _LINUX_ISHTP_CL_BUS_H */
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