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/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/* Copyright (c) 2010-2012 Broadcom. All rights reserved. */
#ifndef VCHIQ_IF_H
#define VCHIQ_IF_H
#define VCHIQ_SERVICE_HANDLE_INVALID 0
#define VCHIQ_SLOT_SIZE 4096
#define VCHIQ_MAX_MSG_SIZE (VCHIQ_SLOT_SIZE - sizeof(struct vchiq_header))
#define VCHIQ_CHANNEL_SIZE VCHIQ_MAX_MSG_SIZE /* For backwards compatibility */
#define VCHIQ_MAKE_FOURCC(x0, x1, x2, x3) \
(((x0) << 24) | ((x1) << 16) | ((x2) << 8) | (x3))
#define VCHIQ_GET_SERVICE_USERDATA(service) vchiq_get_service_userdata(service)
#define VCHIQ_GET_SERVICE_FOURCC(service) vchiq_get_service_fourcc(service)
typedef enum {
VCHIQ_SERVICE_OPENED, /* service, -, - */
VCHIQ_SERVICE_CLOSED, /* service, -, - */
VCHIQ_MESSAGE_AVAILABLE, /* service, header, - */
VCHIQ_BULK_TRANSMIT_DONE, /* service, -, bulk_userdata */
VCHIQ_BULK_RECEIVE_DONE, /* service, -, bulk_userdata */
VCHIQ_BULK_TRANSMIT_ABORTED, /* service, -, bulk_userdata */
VCHIQ_BULK_RECEIVE_ABORTED /* service, -, bulk_userdata */
} VCHIQ_REASON_T;
typedef enum {
VCHIQ_ERROR = -1,
VCHIQ_SUCCESS = 0,
VCHIQ_RETRY = 1
} VCHIQ_STATUS_T;
typedef enum {
VCHIQ_BULK_MODE_CALLBACK,
VCHIQ_BULK_MODE_BLOCKING,
VCHIQ_BULK_MODE_NOCALLBACK,
VCHIQ_BULK_MODE_WAITING /* Reserved for internal use */
} VCHIQ_BULK_MODE_T;
typedef enum {
VCHIQ_SERVICE_OPTION_AUTOCLOSE,
VCHIQ_SERVICE_OPTION_SLOT_QUOTA,
VCHIQ_SERVICE_OPTION_MESSAGE_QUOTA,
VCHIQ_SERVICE_OPTION_SYNCHRONOUS,
VCHIQ_SERVICE_OPTION_TRACE
} VCHIQ_SERVICE_OPTION_T;
struct vchiq_header {
/* The message identifier - opaque to applications. */
int msgid;
/* Size of message data. */
unsigned int size;
char data[0]; /* message */
};
struct vchiq_element {
const void __user *data;
unsigned int size;
};
typedef unsigned int VCHIQ_SERVICE_HANDLE_T;
typedef VCHIQ_STATUS_T (*VCHIQ_CALLBACK_T)(VCHIQ_REASON_T,
struct vchiq_header *,
VCHIQ_SERVICE_HANDLE_T, void *);
struct vchiq_service_base {
int fourcc;
VCHIQ_CALLBACK_T callback;
void *userdata;
};
struct vchiq_service_params {
int fourcc;
VCHIQ_CALLBACK_T callback;
void *userdata;
short version; /* Increment for non-trivial changes */
short version_min; /* Update for incompatible changes */
};
struct vchiq_config {
unsigned int max_msg_size;
unsigned int bulk_threshold; /* The message size above which it
is better to use a bulk transfer
(<= max_msg_size) */
unsigned int max_outstanding_bulks;
unsigned int max_services;
short version; /* The version of VCHIQ */
short version_min; /* The minimum compatible version of VCHIQ */
};
typedef struct vchiq_instance_struct *VCHIQ_INSTANCE_T;
typedef void (*VCHIQ_REMOTE_USE_CALLBACK_T)(void *cb_arg);
extern VCHIQ_STATUS_T vchiq_initialise(VCHIQ_INSTANCE_T *pinstance);
extern VCHIQ_STATUS_T vchiq_shutdown(VCHIQ_INSTANCE_T instance);
extern VCHIQ_STATUS_T vchiq_connect(VCHIQ_INSTANCE_T instance);
extern VCHIQ_STATUS_T vchiq_add_service(VCHIQ_INSTANCE_T instance,
const struct vchiq_service_params *params,
VCHIQ_SERVICE_HANDLE_T *pservice);
extern VCHIQ_STATUS_T vchiq_open_service(VCHIQ_INSTANCE_T instance,
const struct vchiq_service_params *params,
VCHIQ_SERVICE_HANDLE_T *pservice);
extern VCHIQ_STATUS_T vchiq_close_service(VCHIQ_SERVICE_HANDLE_T service);
extern VCHIQ_STATUS_T vchiq_remove_service(VCHIQ_SERVICE_HANDLE_T service);
extern VCHIQ_STATUS_T vchiq_use_service(VCHIQ_SERVICE_HANDLE_T service);
extern VCHIQ_STATUS_T vchiq_release_service(VCHIQ_SERVICE_HANDLE_T service);
extern VCHIQ_STATUS_T
vchiq_queue_message(VCHIQ_SERVICE_HANDLE_T handle,
ssize_t (*copy_callback)(void *context, void *dest,
size_t offset, size_t maxsize),
void *context,
size_t size);
extern void vchiq_release_message(VCHIQ_SERVICE_HANDLE_T service,
struct vchiq_header *header);
extern VCHIQ_STATUS_T vchiq_bulk_transmit(VCHIQ_SERVICE_HANDLE_T service,
const void *data, unsigned int size, void *userdata,
VCHIQ_BULK_MODE_T mode);
extern VCHIQ_STATUS_T vchiq_bulk_receive(VCHIQ_SERVICE_HANDLE_T service,
void *data, unsigned int size, void *userdata,
VCHIQ_BULK_MODE_T mode);
extern VCHIQ_STATUS_T vchiq_bulk_transmit_handle(VCHIQ_SERVICE_HANDLE_T service,
const void *offset, unsigned int size,
void *userdata, VCHIQ_BULK_MODE_T mode);
extern VCHIQ_STATUS_T vchiq_bulk_receive_handle(VCHIQ_SERVICE_HANDLE_T service,
void *offset, unsigned int size, void *userdata,
VCHIQ_BULK_MODE_T mode);
extern int vchiq_get_client_id(VCHIQ_SERVICE_HANDLE_T service);
extern void *vchiq_get_service_userdata(VCHIQ_SERVICE_HANDLE_T service);
extern int vchiq_get_service_fourcc(VCHIQ_SERVICE_HANDLE_T service);
extern void vchiq_get_config(struct vchiq_config *config);
extern VCHIQ_STATUS_T vchiq_set_service_option(VCHIQ_SERVICE_HANDLE_T service,
VCHIQ_SERVICE_OPTION_T option, int value);
extern VCHIQ_STATUS_T vchiq_remote_use(VCHIQ_INSTANCE_T instance,
VCHIQ_REMOTE_USE_CALLBACK_T callback, void *cb_arg);
extern VCHIQ_STATUS_T vchiq_remote_release(VCHIQ_INSTANCE_T instance);
extern VCHIQ_STATUS_T vchiq_dump_phys_mem(VCHIQ_SERVICE_HANDLE_T service,
void *ptr, size_t num_bytes);
extern VCHIQ_STATUS_T vchiq_get_peer_version(VCHIQ_SERVICE_HANDLE_T handle,
short *peer_version);
#endif /* VCHIQ_IF_H */
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