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| 2547 | cejka | 1 | /* |
| 2 | * Copyright (c) 2007 Josef Cejka |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup devmap |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | #ifndef DEVMAP_DEVMAP_H_ |
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| 34 | #define DEVMAP_DEVMAP_H_ |
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| 35 | |||
| 4401 | svoboda | 36 | #include <atomic.h> |
| 2550 | cejka | 37 | #include <ipc/ipc.h> |
| 2555 | cejka | 38 | #include <libadt/list.h> |
| 2550 | cejka | 39 | |
| 2555 | cejka | 40 | #define DEVMAP_NAME_MAXLEN 512 |
| 41 | |||
| 2547 | cejka | 42 | typedef enum { |
| 2594 | cejka | 43 | DEVMAP_DRIVER_REGISTER = IPC_FIRST_USER_METHOD, |
| 44 | DEVMAP_DRIVER_UNREGISTER, |
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| 45 | DEVMAP_DEVICE_REGISTER, |
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| 46 | DEVMAP_DEVICE_UNREGISTER, |
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| 47 | DEVMAP_DEVICE_GET_NAME, |
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| 48 | DEVMAP_DEVICE_GET_HANDLE |
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| 2547 | cejka | 49 | } devmap_request_t; |
| 50 | |||
| 2594 | cejka | 51 | /** Representation of device driver. |
| 52 | * Each driver is responsible for a set of devices. |
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| 53 | */ |
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| 54 | typedef struct { |
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| 55 | /** Pointers to previous and next drivers in linked list */ |
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| 56 | link_t drivers; |
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| 57 | /** Pointer to the linked list of devices controlled by |
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| 58 | * this driver */ |
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| 59 | link_t devices; |
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| 60 | /** Phone asociated with this driver */ |
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| 61 | ipcarg_t phone; |
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| 62 | /** Device driver name */ |
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| 63 | char *name; |
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| 64 | /** Futex for list of devices owned by this driver */ |
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| 65 | atomic_t devices_futex; |
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| 66 | } devmap_driver_t; |
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| 2555 | cejka | 67 | |
| 68 | /** Info about registered device |
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| 69 | * |
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| 70 | */ |
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| 71 | typedef struct { |
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| 2594 | cejka | 72 | /** Pointer to the previous and next device in the list of all devices */ |
| 73 | link_t devices; |
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| 74 | /** Pointer to the previous and next device in the list of devices |
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| 75 | owned by one driver */ |
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| 76 | link_t driver_devices; |
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| 77 | /** Unique device identifier */ |
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| 2555 | cejka | 78 | int handle; |
| 2594 | cejka | 79 | /** Device name */ |
| 2555 | cejka | 80 | char *name; |
| 2594 | cejka | 81 | /** Device driver handling this device */ |
| 82 | devmap_driver_t *driver; |
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| 2555 | cejka | 83 | } devmap_device_t; |
| 84 | |||
| 2635 | cejka | 85 | /** Interface provided by devmap. |
| 86 | * Every process that connects to devmap must ask one of following |
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| 87 | * interfaces otherwise connection will be refused. |
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| 2594 | cejka | 88 | */ |
| 89 | typedef enum { |
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| 2635 | cejka | 90 | /** Connect as device driver */ |
| 91 | DEVMAP_DRIVER = 1, |
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| 92 | /** Connect as client */ |
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| 93 | DEVMAP_CLIENT, |
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| 94 | /** Create new connection to instance of device that |
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| 95 | * is specified by second argument of call. */ |
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| 96 | DEVMAP_CONNECT_TO_DEVICE |
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| 2594 | cejka | 97 | } devmap_interface_t; |
| 98 | |||
| 2547 | cejka | 99 | #endif |
| 100 |