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  1. /*
  2.  * Copyright (c) 2007 Josef Cejka
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup devmap
  30.  * @{
  31.  */
  32.  
  33. #ifndef DEVMAP_DEVMAP_H_
  34. #define DEVMAP_DEVMAP_H_
  35.  
  36. #include <ipc/ipc.h>
  37. #include <libadt/list.h>
  38.  
  39. #define DEVMAP_NAME_MAXLEN 512
  40.  
  41. typedef enum {
  42.     DEVMAP_DRIVER_REGISTER = IPC_FIRST_USER_METHOD,
  43.     DEVMAP_DRIVER_UNREGISTER,
  44.     DEVMAP_DEVICE_REGISTER,
  45.     DEVMAP_DEVICE_UNREGISTER,
  46.     DEVMAP_DEVICE_GET_NAME,
  47.     DEVMAP_DEVICE_GET_HANDLE
  48. } devmap_request_t;
  49.  
  50. /** Representation of device driver.
  51.  * Each driver is responsible for a set of devices.
  52.  */
  53. typedef struct {
  54.         /** Pointers to previous and next drivers in linked list */
  55.     link_t drivers;
  56.         /** Pointer to the linked list of devices controlled by
  57.          * this driver */
  58.     link_t devices;
  59.         /** Phone asociated with this driver */
  60.     ipcarg_t phone;
  61.         /** Device driver name */
  62.     char *name;
  63.         /** Futex for list of devices owned by this driver */
  64.     atomic_t devices_futex;
  65. } devmap_driver_t;
  66.  
  67. /** Info about registered device
  68.  *
  69.  */
  70. typedef struct {
  71.         /** Pointer to the previous and next device in the list of all devices */
  72.     link_t devices;
  73.         /** Pointer to the previous and next device in the list of devices
  74.          owned by one driver */
  75.     link_t driver_devices;
  76.         /** Unique device identifier  */
  77.     int handle;
  78.         /** Device name */
  79.     char *name;
  80.         /** Device driver handling this device */
  81.     devmap_driver_t *driver;
  82. } devmap_device_t;
  83.  
  84. /** Interface provided by devmap.
  85.  * Every process that connects to devmap must ask one of following
  86.  * interfaces otherwise connection will be refused.
  87.  */
  88. typedef enum {
  89.         /** Connect as device driver */
  90.     DEVMAP_DRIVER = 1, 
  91.         /** Connect as client */
  92.     DEVMAP_CLIENT,
  93.         /** Create new connection to instance of device that
  94.          * is specified by second argument of call. */
  95.     DEVMAP_CONNECT_TO_DEVICE
  96. } devmap_interface_t;
  97.  
  98. #endif
  99.  
  100.