source: mainline/uspace/lib/libc/include/ipc/devman.h@ d1fc8f0

/*
 * Copyright (c) 2010 Lenka Trochtova
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup devman
 * @{
 */
 
#ifndef LIBC_IPC_DEVMAN_H_
#define LIBC_IPC_DEVMAN_H_

#include <adt/list.h>
#include <ipc/ipc.h>
#include <stdlib.h>
#include <string.h>

#define DEVMAN_NAME_MAXLEN 256

typedef ipcarg_t device_handle_t;

/** Ids of device models used for device-to-driver matching.
 */
typedef struct match_id {
        /** Pointers to next and previous ids.
         */
        link_t link;
        /** Id of device model.
         */
        char *id;
        /** Relevancy of device-to-driver match.
         * The higher is the product of scores specified for the device by the bus driver and by the leaf driver,
         * the more suitable is the leaf driver for handling the device.
         */
        unsigned int score;
} match_id_t;

/** List of ids for matching devices to drivers sorted
 * according to match scores in descending order.
 */
typedef struct match_id_list {
        link_t ids;
} match_id_list_t;


static inline match_id_t * create_match_id()
{
        match_id_t *id = malloc(sizeof(match_id_t));
        memset(id, 0, sizeof(match_id_t));
        return id;
}

static inline void delete_match_id(match_id_t *id)
{
        if (id) {
                if (NULL != id->id) {
                        free(id->id);
                }
                free(id);
        }
}

static inline void add_match_id(match_id_list_t *ids, match_id_t *id) 
{
        match_id_t *mid = NULL;
        link_t *link = ids->ids.next;   
        
        while (link != &ids->ids) {
                mid = list_get_instance(link, match_id_t,link);
                if (mid->score < id->score) {
                        break;
                }       
                link = link->next;
        }
        
        list_insert_before(&id->link, link);    
}

static inline void clean_match_ids(match_id_list_t *ids)
{
        link_t *link = NULL;
        match_id_t *id;
        
        while(!list_empty(&ids->ids)) {
                link = ids->ids.next;
                list_remove(link);              
                id = list_get_instance(link, match_id_t, link);
                delete_match_id(id);            
        }       
}

typedef enum {
        DEVMAN_DRIVER = 1,
        DEVMAN_CLIENT,
        DEVMAN_CONNECT_TO_DEVICE,
        DEVMAN_CONNECT_TO_PARENTS_DEVICE
} devman_interface_t;

typedef enum {
        DEVMAN_DRIVER_REGISTER = IPC_FIRST_USER_METHOD,
        DEVMAN_ADD_CHILD_DEVICE,
        DEVMAN_ADD_MATCH_ID

} driver_to_devman_t;

typedef enum {
        DRIVER_ADD_DEVICE = IPC_FIRST_USER_METHOD

} devman_to_driver_t;

#endif

/** @}
 */