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/*
* Copyright (c) 2013 TRUSTONIC LIMITED
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _MC_KAPI_SESSION_H_
#define _MC_KAPI_SESSION_H_
#include "common.h"
#include <linux/list.h>
#include "connection.h"
struct bulk_buffer_descriptor {
void *virt_addr; /* The VA of the Bulk buffer */
uint32_t len; /* Length of the Bulk buffer */
uint32_t handle;
/* The list param for using the kernel lists*/
struct list_head list;
};
struct bulk_buffer_descriptor *bulk_buffer_descriptor_create(
void *virt_addr,
uint32_t len,
uint32_t handle
);
/*
* Session states.
* At the moment not used !!
*/
enum session_state {
SESSION_STATE_INITIAL,
SESSION_STATE_OPEN,
SESSION_STATE_TRUSTLET_DEAD
};
#define SESSION_ERR_NO 0 /* No session error */
/*
* Session information structure.
* The information structure is used to hold the state of the session, which
* will limit further actions for the session.
* Also the last error code will be stored till it's read.
*/
struct session_information {
enum session_state state; /* Session state */
int32_t last_error; /* Last error of session */
};
struct session {
struct mc_instance *instance;
/* Descriptors of additional bulk buffer of a session */
struct list_head bulk_buffer_descriptors;
/* Information about session */
struct session_information session_info;
uint32_t session_id;
struct connection *notification_connection;
/* The list param for using the kernel lists */
struct list_head list;
};
struct session *session_create(
uint32_t session_id,
void *instance,
struct connection *connection
);
void session_cleanup(struct session *session);
/*
* session_add_bulk_buf() - Add address information of additional bulk
* buffer memory to session and register virtual
* memory in kernel module
* @session: Session information structure
* @buf: The virtual address of bulk buffer.
* @len: Length of bulk buffer.
*
* The virtual address can only be added one time. If the virtual
* address already exist, NULL is returned.
*
* On success the actual Bulk buffer descriptor with all address information
* is returned, NULL if an error occurs.
*/
struct bulk_buffer_descriptor *session_add_bulk_buf(
struct session *session, void *buf, uint32_t len);
/*
* session_remove_bulk_buf() - Remove address information of additional bulk
* buffer memory from session and unregister
* virtual memory in kernel module
* @session: Session information structure
* @buf: The virtual address of the bulk buffer
*
* Returns true on success
*/
bool session_remove_bulk_buf(struct session *session, void *buf);
/*
* session_find_bulk_buf() - Find the handle of the bulk buffer for this
* session
*
* @session: Session information structure
* @buf: The virtual address of bulk buffer.
*
* On success the actual Bulk buffer handle is returned, 0
* if an error occurs.
*/
uint32_t session_find_bulk_buf(struct session *session, void *virt_addr);
/*
* session_set_error_info() - Set additional error information of the last
* error that occurred.
* @session: Session information structure
* @err: The actual error
*/
void session_set_error_info(struct session *session, int32_t err);
/*
* session_get_last_err() - Get additional error information of the last
* error that occurred.
* @session: Session information structure
*
* After request the information is set to SESSION_ERR_NO.
*
* Returns the last stored error code or SESSION_ERR_NO
*/
int32_t session_get_last_err(struct session *session);
#endif /* _MC_KAPI_SESSION_H_ */
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