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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 <atomic.h>
  37. #include <ipc/ipc.h>
  38. #include <libadt/list.h>
  39.  
  40. #define DEVMAP_NAME_MAXLEN 512
  41.  
  42. typedef enum {
  43.     DEVMAP_DRIVER_REGISTER = IPC_FIRST_USER_METHOD,
  44.     DEVMAP_DRIVER_UNREGISTER,
  45.     DEVMAP_DEVICE_REGISTER,
  46.     DEVMAP_DEVICE_UNREGISTER,
  47.     DEVMAP_DEVICE_GET_NAME,
  48.     DEVMAP_DEVICE_GET_HANDLE
  49. } devmap_request_t;
  50.  
  51. /** Representation of device driver.
  52.  * Each driver is responsible for a set of devices.
  53.  */
  54. typedef struct {
  55.         /** Pointers to previous and next drivers in linked list */
  56.     link_t drivers;
  57.         /** Pointer to the linked list of devices controlled by
  58.          * this driver */
  59.     link_t devices;
  60.         /** Phone asociated with this driver */
  61.     ipcarg_t phone;
  62.         /** Device driver name */
  63.     char *name;
  64.         /** Futex for list of devices owned by this driver */
  65.     atomic_t devices_futex;
  66. } devmap_driver_t;
  67.  
  68. /** Info about registered device
  69.  *
  70.  */
  71. typedef struct {
  72.         /** Pointer to the previous and next device in the list of all devices */
  73.     link_t devices;
  74.         /** Pointer to the previous and next device in the list of devices
  75.          owned by one driver */
  76.     link_t driver_devices;
  77.         /** Unique device identifier  */
  78.     int handle;
  79.         /** Device name */
  80.     char *name;
  81.         /** Device driver handling this device */
  82.     devmap_driver_t *driver;
  83. } devmap_device_t;
  84.  
  85. /** Interface provided by devmap.
  86.  * Every process that connects to devmap must ask one of following
  87.  * interfaces otherwise connection will be refused.
  88.  */
  89. typedef enum {
  90.         /** Connect as device driver */
  91.     DEVMAP_DRIVER = 1, 
  92.         /** Connect as client */
  93.     DEVMAP_CLIENT,
  94.         /** Create new connection to instance of device that
  95.          * is specified by second argument of call. */
  96.     DEVMAP_CONNECT_TO_DEVICE
  97. } devmap_interface_t;
  98.  
  99. #endif
  100.  
  101.