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1 | /* |
1 | /* |
2 | * Copyright (c) 2007 Josef Cejka |
2 | * Copyright (c) 2007 Josef Cejka |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** |
29 | /** |
30 | * @defgroup devmap Device mapper. |
30 | * @defgroup devmap Device mapper. |
31 | * @brief HelenOS device mapper. |
31 | * @brief HelenOS device mapper. |
32 | * @{ |
32 | * @{ |
33 | */ |
33 | */ |
34 | 34 | ||
35 | /** @file |
35 | /** @file |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include <ipc/services.h> |
38 | #include <ipc/services.h> |
39 | #include <ipc/ns.h> |
39 | #include <ipc/ns.h> |
40 | #include <async.h> |
40 | #include <async.h> |
41 | #include <stdio.h> |
41 | #include <stdio.h> |
42 | #include <errno.h> |
42 | #include <errno.h> |
43 | #include <bool.h> |
43 | #include <bool.h> |
44 | #include <futex.h> |
44 | #include <futex.h> |
45 | #include <stdlib.h> |
45 | #include <stdlib.h> |
46 | #include <string.h> |
46 | #include <string.h> |
47 | #include <ipc/devmap.h> |
47 | #include <ipc/devmap.h> |
48 | 48 | ||
49 | #define NAME "devmap" |
49 | #define NAME "devmap" |
50 | 50 | ||
51 | 51 | ||
52 | LIST_INITIALIZE(devices_list); |
52 | LIST_INITIALIZE(devices_list); |
53 | LIST_INITIALIZE(drivers_list); |
53 | LIST_INITIALIZE(drivers_list); |
54 | 54 | ||
55 | /* order of locking: |
55 | /* order of locking: |
56 | * drivers_list_futex |
56 | * drivers_list_futex |
57 | * devices_list_futex |
57 | * devices_list_futex |
58 | * (devmap_driver_t *)->devices_futex |
58 | * (devmap_driver_t *)->devices_futex |
59 | * create_handle_futex |
59 | * create_handle_futex |
60 | **/ |
60 | **/ |
61 | 61 | ||
62 | static atomic_t devices_list_futex = FUTEX_INITIALIZER; |
62 | static atomic_t devices_list_futex = FUTEX_INITIALIZER; |
63 | static atomic_t drivers_list_futex = FUTEX_INITIALIZER; |
63 | static atomic_t drivers_list_futex = FUTEX_INITIALIZER; |
64 | static atomic_t create_handle_futex = FUTEX_INITIALIZER; |
64 | static atomic_t create_handle_futex = FUTEX_INITIALIZER; |
65 | 65 | ||
66 | 66 | ||
67 | static int devmap_create_handle(void) |
67 | static int devmap_create_handle(void) |
68 | { |
68 | { |
69 | static int last_handle = 0; |
69 | static int last_handle = 0; |
70 | int handle; |
70 | int handle; |
71 | 71 | ||
72 | /* TODO: allow reusing old handles after their unregistration |
72 | /* TODO: allow reusing old handles after their unregistration |
73 | and implement some version of LRU algorithm */ |
73 | and implement some version of LRU algorithm */ |
74 | /* FIXME: overflow */ |
74 | /* FIXME: overflow */ |
75 | futex_down(&create_handle_futex); |
75 | futex_down(&create_handle_futex); |
76 | 76 | ||
77 | last_handle += 1; |
77 | last_handle += 1; |
78 | handle = last_handle; |
78 | handle = last_handle; |
79 | 79 | ||
80 | futex_up(&create_handle_futex); |
80 | futex_up(&create_handle_futex); |
81 | 81 | ||
82 | return handle; |
82 | return handle; |
83 | } |
83 | } |
84 | 84 | ||
85 | 85 | ||
86 | /** Initialize device mapper. |
86 | /** Initialize device mapper. |
87 | * |
87 | * |
88 | * |
88 | * |
89 | */ |
89 | */ |
90 | static int devmap_init() |
90 | static int devmap_init() |
91 | { |
91 | { |
92 | /* TODO: */ |
92 | /* TODO: */ |
93 | 93 | ||
94 | return EOK; |
94 | return EOK; |
95 | } |
95 | } |
96 | 96 | ||
97 | /** Find device with given name. |
97 | /** Find device with given name. |
98 | * |
98 | * |
99 | */ |
99 | */ |
100 | static devmap_device_t *devmap_device_find_name(const char *name) |
100 | static devmap_device_t *devmap_device_find_name(const char *name) |
101 | { |
101 | { |
102 | link_t *item; |
102 | link_t *item; |
103 | devmap_device_t *device = NULL; |
103 | devmap_device_t *device = NULL; |
104 | 104 | ||
105 | item = devices_list.next; |
105 | item = devices_list.next; |
106 | 106 | ||
107 | while (item != &devices_list) { |
107 | while (item != &devices_list) { |
108 | 108 | ||
109 | device = list_get_instance(item, devmap_device_t, devices); |
109 | device = list_get_instance(item, devmap_device_t, devices); |
110 | if (0 == strcmp(device->name, name)) { |
110 | if (0 == strcmp(device->name, name)) { |
111 | break; |
111 | break; |
112 | } |
112 | } |
113 | item = item->next; |
113 | item = item->next; |
114 | } |
114 | } |
115 | 115 | ||
116 | if (item == &devices_list) |
116 | if (item == &devices_list) |
117 | return NULL; |
117 | return NULL; |
118 | 118 | ||
119 | device = list_get_instance(item, devmap_device_t, devices); |
119 | device = list_get_instance(item, devmap_device_t, devices); |
120 | return device; |
120 | return device; |
121 | } |
121 | } |
122 | 122 | ||
123 | /** Find device with given handle. |
123 | /** Find device with given handle. |
124 | * @todo: use hash table |
124 | * @todo: use hash table |
125 | */ |
125 | */ |
126 | static devmap_device_t *devmap_device_find_handle(int handle) |
126 | static devmap_device_t *devmap_device_find_handle(int handle) |
127 | { |
127 | { |
128 | link_t *item; |
128 | link_t *item; |
129 | devmap_device_t *device = NULL; |
129 | devmap_device_t *device = NULL; |
130 | 130 | ||
131 | futex_down(&devices_list_futex); |
131 | futex_down(&devices_list_futex); |
132 | 132 | ||
133 | item = (&devices_list)->next; |
133 | item = (&devices_list)->next; |
134 | 134 | ||
135 | while (item != &devices_list) { |
135 | while (item != &devices_list) { |
136 | 136 | ||
137 | device = list_get_instance(item, devmap_device_t, devices); |
137 | device = list_get_instance(item, devmap_device_t, devices); |
138 | if (device->handle == handle) { |
138 | if (device->handle == handle) { |
139 | break; |
139 | break; |
140 | } |
140 | } |
141 | item = item->next; |
141 | item = item->next; |
142 | } |
142 | } |
143 | 143 | ||
144 | if (item == &devices_list) { |
144 | if (item == &devices_list) { |
145 | futex_up(&devices_list_futex); |
145 | futex_up(&devices_list_futex); |
146 | return NULL; |
146 | return NULL; |
147 | } |
147 | } |
148 | 148 | ||
149 | device = list_get_instance(item, devmap_device_t, devices); |
149 | device = list_get_instance(item, devmap_device_t, devices); |
150 | 150 | ||
151 | futex_up(&devices_list_futex); |
151 | futex_up(&devices_list_futex); |
152 | 152 | ||
153 | return device; |
153 | return device; |
154 | } |
154 | } |
155 | 155 | ||
156 | /** |
156 | /** |
157 | * Unregister device and free it. It's assumed that driver's device list is |
157 | * Unregister device and free it. It's assumed that driver's device list is |
158 | * already locked. |
158 | * already locked. |
159 | */ |
159 | */ |
160 | static int devmap_device_unregister_core(devmap_device_t *device) |
160 | static int devmap_device_unregister_core(devmap_device_t *device) |
161 | { |
161 | { |
162 | 162 | ||
163 | list_remove(&(device->devices)); |
163 | list_remove(&(device->devices)); |
164 | list_remove(&(device->driver_devices)); |
164 | list_remove(&(device->driver_devices)); |
165 | 165 | ||
166 | free(device->name); |
166 | free(device->name); |
167 | free(device); |
167 | free(device); |
168 | 168 | ||
169 | 169 | ||
170 | return EOK; |
170 | return EOK; |
171 | } |
171 | } |
172 | 172 | ||
173 | /** |
173 | /** |
174 | * Read info about new driver and add it into linked list of registered |
174 | * Read info about new driver and add it into linked list of registered |
175 | * drivers. |
175 | * drivers. |
176 | */ |
176 | */ |
177 | static void devmap_driver_register(devmap_driver_t **odriver) |
177 | static void devmap_driver_register(devmap_driver_t **odriver) |
178 | { |
178 | { |
179 | size_t name_size; |
179 | size_t name_size; |
180 | ipc_callid_t callid; |
180 | ipc_callid_t callid; |
181 | ipc_call_t call; |
181 | ipc_call_t call; |
182 | devmap_driver_t *driver; |
182 | devmap_driver_t *driver; |
183 | ipc_callid_t iid; |
183 | ipc_callid_t iid; |
184 | ipc_call_t icall; |
184 | ipc_call_t icall; |
185 | 185 | ||
186 | *odriver = NULL; |
186 | *odriver = NULL; |
187 | 187 | ||
188 | iid = async_get_call(&icall); |
188 | iid = async_get_call(&icall); |
189 | 189 | ||
190 | if (IPC_GET_METHOD(icall) != DEVMAP_DRIVER_REGISTER) { |
190 | if (IPC_GET_METHOD(icall) != DEVMAP_DRIVER_REGISTER) { |
191 | ipc_answer_0(iid, EREFUSED); |
191 | ipc_answer_0(iid, EREFUSED); |
192 | return; |
192 | return; |
193 | } |
193 | } |
194 | 194 | ||
195 | if (NULL == |
195 | if (NULL == |
196 | (driver = (devmap_driver_t *)malloc(sizeof(devmap_driver_t)))) { |
196 | (driver = (devmap_driver_t *)malloc(sizeof(devmap_driver_t)))) { |
197 | ipc_answer_0(iid, ENOMEM); |
197 | ipc_answer_0(iid, ENOMEM); |
198 | return; |
198 | return; |
199 | } |
199 | } |
200 | 200 | ||
201 | /* |
201 | /* |
202 | * Get driver name |
202 | * Get driver name |
203 | */ |
203 | */ |
204 | if (!ipc_data_write_receive(&callid, &name_size)) { |
204 | if (!ipc_data_write_receive(&callid, &name_size)) { |
205 | free(driver); |
205 | free(driver); |
206 | ipc_answer_0(callid, EREFUSED); |
206 | ipc_answer_0(callid, EREFUSED); |
207 | ipc_answer_0(iid, EREFUSED); |
207 | ipc_answer_0(iid, EREFUSED); |
208 | return; |
208 | return; |
209 | } |
209 | } |
210 | 210 | ||
211 | if (name_size > DEVMAP_NAME_MAXLEN) { |
211 | if (name_size > DEVMAP_NAME_MAXLEN) { |
212 | free(driver); |
212 | free(driver); |
213 | ipc_answer_0(callid, EINVAL); |
213 | ipc_answer_0(callid, EINVAL); |
214 | ipc_answer_0(iid, EREFUSED); |
214 | ipc_answer_0(iid, EREFUSED); |
215 | return; |
215 | return; |
216 | } |
216 | } |
217 | 217 | ||
218 | /* |
218 | /* |
219 | * Allocate buffer for device name. |
219 | * Allocate buffer for device name. |
220 | */ |
220 | */ |
221 | if (NULL == (driver->name = (char *)malloc(name_size + 1))) { |
221 | if (NULL == (driver->name = (char *)malloc(name_size + 1))) { |
222 | free(driver); |
222 | free(driver); |
223 | ipc_answer_0(callid, ENOMEM); |
223 | ipc_answer_0(callid, ENOMEM); |
224 | ipc_answer_0(iid, EREFUSED); |
224 | ipc_answer_0(iid, EREFUSED); |
225 | return; |
225 | return; |
226 | } |
226 | } |
227 | 227 | ||
228 | /* |
228 | /* |
229 | * Send confirmation to sender and get data into buffer. |
229 | * Send confirmation to sender and get data into buffer. |
230 | */ |
230 | */ |
231 | if (EOK != ipc_data_write_finalize(callid, driver->name, name_size)) { |
231 | if (EOK != ipc_data_write_finalize(callid, driver->name, name_size)) { |
232 | free(driver->name); |
232 | free(driver->name); |
233 | free(driver); |
233 | free(driver); |
234 | ipc_answer_0(iid, EREFUSED); |
234 | ipc_answer_0(iid, EREFUSED); |
235 | return; |
235 | return; |
236 | } |
236 | } |
237 | 237 | ||
238 | driver->name[name_size] = 0; |
238 | driver->name[name_size] = 0; |
239 | 239 | ||
240 | /* Initialize futex for list of devices owned by this driver */ |
240 | /* Initialize futex for list of devices owned by this driver */ |
241 | futex_initialize(&(driver->devices_futex), 1); |
241 | futex_initialize(&(driver->devices_futex), 1); |
242 | 242 | ||
243 | /* |
243 | /* |
244 | * Initialize list of asociated devices |
244 | * Initialize list of asociated devices |
245 | */ |
245 | */ |
246 | list_initialize(&(driver->devices)); |
246 | list_initialize(&(driver->devices)); |
247 | 247 | ||
248 | /* |
248 | /* |
249 | * Create connection to the driver |
249 | * Create connection to the driver |
250 | */ |
250 | */ |
251 | callid = async_get_call(&call); |
251 | callid = async_get_call(&call); |
252 | 252 | ||
253 | if (IPC_M_CONNECT_TO_ME != IPC_GET_METHOD(call)) { |
253 | if (IPC_M_CONNECT_TO_ME != IPC_GET_METHOD(call)) { |
254 | ipc_answer_0(callid, ENOTSUP); |
254 | ipc_answer_0(callid, ENOTSUP); |
255 | 255 | ||
256 | free(driver->name); |
256 | free(driver->name); |
257 | free(driver); |
257 | free(driver); |
258 | ipc_answer_0(iid, ENOTSUP); |
258 | ipc_answer_0(iid, ENOTSUP); |
259 | return; |
259 | return; |
260 | } |
260 | } |
261 | 261 | ||
262 | driver->phone = IPC_GET_ARG5(call); |
262 | driver->phone = IPC_GET_ARG5(call); |
263 | 263 | ||
264 | ipc_answer_0(callid, EOK); |
264 | ipc_answer_0(callid, EOK); |
265 | 265 | ||
266 | list_initialize(&(driver->drivers)); |
266 | list_initialize(&(driver->drivers)); |
267 | 267 | ||
268 | futex_down(&drivers_list_futex); |
268 | futex_down(&drivers_list_futex); |
269 | 269 | ||
270 | /* TODO: |
270 | /* TODO: |
271 | * check that no driver with name equal to driver->name is registered |
271 | * check that no driver with name equal to driver->name is registered |
272 | */ |
272 | */ |
273 | 273 | ||
274 | /* |
274 | /* |
275 | * Insert new driver into list of registered drivers |
275 | * Insert new driver into list of registered drivers |
276 | */ |
276 | */ |
277 | list_append(&(driver->drivers), &drivers_list); |
277 | list_append(&(driver->drivers), &drivers_list); |
278 | futex_up(&drivers_list_futex); |
278 | futex_up(&drivers_list_futex); |
279 | 279 | ||
280 | ipc_answer_0(iid, EOK); |
280 | ipc_answer_0(iid, EOK); |
281 | 281 | ||
282 | *odriver = driver; |
282 | *odriver = driver; |
283 | } |
283 | } |
284 | 284 | ||
285 | /** Unregister device driver, unregister all its devices and free driver |
285 | /** Unregister device driver, unregister all its devices and free driver |
286 | * structure. |
286 | * structure. |
287 | */ |
287 | */ |
288 | static int devmap_driver_unregister(devmap_driver_t *driver) |
288 | static int devmap_driver_unregister(devmap_driver_t *driver) |
289 | { |
289 | { |
290 | devmap_device_t *device; |
290 | devmap_device_t *device; |
291 | 291 | ||
292 | if (NULL == driver) |
292 | if (NULL == driver) |
293 | return EEXISTS; |
293 | return EEXISTS; |
294 | 294 | ||
295 | futex_down(&drivers_list_futex); |
295 | futex_down(&drivers_list_futex); |
296 | 296 | ||
297 | ipc_hangup(driver->phone); |
297 | ipc_hangup(driver->phone); |
298 | 298 | ||
299 | /* remove it from list of drivers */ |
299 | /* remove it from list of drivers */ |
300 | list_remove(&(driver->drivers)); |
300 | list_remove(&(driver->drivers)); |
301 | 301 | ||
302 | /* unregister all its devices */ |
302 | /* unregister all its devices */ |
303 | 303 | ||
304 | futex_down(&devices_list_futex); |
304 | futex_down(&devices_list_futex); |
305 | futex_down(&(driver->devices_futex)); |
305 | futex_down(&(driver->devices_futex)); |
306 | 306 | ||
307 | while (!list_empty(&(driver->devices))) { |
307 | while (!list_empty(&(driver->devices))) { |
308 | device = list_get_instance(driver->devices.next, |
308 | device = list_get_instance(driver->devices.next, |
309 | devmap_device_t, driver_devices); |
309 | devmap_device_t, driver_devices); |
310 | devmap_device_unregister_core(device); |
310 | devmap_device_unregister_core(device); |
311 | } |
311 | } |
312 | 312 | ||
313 | futex_up(&(driver->devices_futex)); |
313 | futex_up(&(driver->devices_futex)); |
314 | futex_up(&devices_list_futex); |
314 | futex_up(&devices_list_futex); |
315 | futex_up(&drivers_list_futex); |
315 | futex_up(&drivers_list_futex); |
316 | 316 | ||
317 | /* free name and driver */ |
317 | /* free name and driver */ |
318 | if (NULL != driver->name) { |
318 | if (NULL != driver->name) { |
319 | free(driver->name); |
319 | free(driver->name); |
320 | } |
320 | } |
321 | 321 | ||
322 | free(driver); |
322 | free(driver); |
323 | 323 | ||
324 | return EOK; |
324 | return EOK; |
325 | } |
325 | } |
326 | 326 | ||
327 | 327 | ||
328 | /** Register instance of device |
328 | /** Register instance of device |
329 | * |
329 | * |
330 | */ |
330 | */ |
331 | static void devmap_device_register(ipc_callid_t iid, ipc_call_t *icall, |
331 | static void devmap_device_register(ipc_callid_t iid, ipc_call_t *icall, |
332 | devmap_driver_t *driver) |
332 | devmap_driver_t *driver) |
333 | { |
333 | { |
334 | ipc_callid_t callid; |
334 | ipc_callid_t callid; |
335 | size_t size; |
335 | size_t size; |
336 | devmap_device_t *device; |
336 | devmap_device_t *device; |
337 | 337 | ||
338 | if (NULL == driver) { |
338 | if (NULL == driver) { |
339 | ipc_answer_0(iid, EREFUSED); |
339 | ipc_answer_0(iid, EREFUSED); |
340 | return; |
340 | return; |
341 | } |
341 | } |
342 | 342 | ||
343 | /* Create new device entry */ |
343 | /* Create new device entry */ |
344 | if (NULL == |
344 | if (NULL == |
345 | (device = (devmap_device_t *) malloc(sizeof(devmap_device_t)))) { |
345 | (device = (devmap_device_t *) malloc(sizeof(devmap_device_t)))) { |
346 | ipc_answer_0(iid, ENOMEM); |
346 | ipc_answer_0(iid, ENOMEM); |
347 | return; |
347 | return; |
348 | } |
348 | } |
349 | 349 | ||
350 | /* Get device name */ |
350 | /* Get device name */ |
351 | if (!ipc_data_write_receive(&callid, &size)) { |
351 | if (!ipc_data_write_receive(&callid, &size)) { |
352 | free(device); |
352 | free(device); |
353 | ipc_answer_0(iid, EREFUSED); |
353 | ipc_answer_0(iid, EREFUSED); |
354 | return; |
354 | return; |
355 | } |
355 | } |
356 | 356 | ||
357 | if (size > DEVMAP_NAME_MAXLEN) { |
357 | if (size > DEVMAP_NAME_MAXLEN) { |
358 | free(device); |
358 | free(device); |
359 | ipc_answer_0(callid, EINVAL); |
359 | ipc_answer_0(callid, EINVAL); |
360 | ipc_answer_0(iid, EREFUSED); |
360 | ipc_answer_0(iid, EREFUSED); |
361 | return; |
361 | return; |
362 | } |
362 | } |
363 | 363 | ||
364 | /* +1 for terminating \0 */ |
364 | /* +1 for terminating \0 */ |
365 | device->name = (char *) malloc(size + 1); |
365 | device->name = (char *) malloc(size + 1); |
366 | 366 | ||
367 | if (NULL == device->name) { |
367 | if (NULL == device->name) { |
368 | free(device); |
368 | free(device); |
369 | ipc_answer_0(callid, ENOMEM); |
369 | ipc_answer_0(callid, ENOMEM); |
370 | ipc_answer_0(iid, EREFUSED); |
370 | ipc_answer_0(iid, EREFUSED); |
371 | return; |
371 | return; |
372 | } |
372 | } |
373 | 373 | ||
374 | ipc_data_write_finalize(callid, device->name, size); |
374 | ipc_data_write_finalize(callid, device->name, size); |
375 | device->name[size] = 0; |
375 | device->name[size] = 0; |
376 | 376 | ||
377 | list_initialize(&(device->devices)); |
377 | list_initialize(&(device->devices)); |
378 | list_initialize(&(device->driver_devices)); |
378 | list_initialize(&(device->driver_devices)); |
379 | 379 | ||
380 | futex_down(&devices_list_futex); |
380 | futex_down(&devices_list_futex); |
381 | 381 | ||
382 | /* Check that device with such name is not already registered */ |
382 | /* Check that device with such name is not already registered */ |
383 | if (NULL != devmap_device_find_name(device->name)) { |
383 | if (NULL != devmap_device_find_name(device->name)) { |
384 | printf(NAME ": Device '%s' already registered\n", device->name); |
384 | printf(NAME ": Device '%s' already registered\n", device->name); |
385 | futex_up(&devices_list_futex); |
385 | futex_up(&devices_list_futex); |
386 | free(device->name); |
386 | free(device->name); |
387 | free(device); |
387 | free(device); |
388 | ipc_answer_0(iid, EEXISTS); |
388 | ipc_answer_0(iid, EEXISTS); |
389 | return; |
389 | return; |
390 | } |
390 | } |
391 | 391 | ||
392 | /* Get unique device handle */ |
392 | /* Get unique device handle */ |
393 | device->handle = devmap_create_handle(); |
393 | device->handle = devmap_create_handle(); |
394 | 394 | ||
395 | device->driver = driver; |
395 | device->driver = driver; |
396 | 396 | ||
397 | /* Insert device into list of all devices */ |
397 | /* Insert device into list of all devices */ |
398 | list_append(&device->devices, &devices_list); |
398 | list_append(&device->devices, &devices_list); |
399 | 399 | ||
400 | /* Insert device into list of devices that belog to one driver */ |
400 | /* Insert device into list of devices that belog to one driver */ |
401 | futex_down(&device->driver->devices_futex); |
401 | futex_down(&device->driver->devices_futex); |
402 | 402 | ||
403 | list_append(&device->driver_devices, &device->driver->devices); |
403 | list_append(&device->driver_devices, &device->driver->devices); |
404 | 404 | ||
405 | futex_up(&device->driver->devices_futex); |
405 | futex_up(&device->driver->devices_futex); |
406 | futex_up(&devices_list_futex); |
406 | futex_up(&devices_list_futex); |
407 | 407 | ||
408 | ipc_answer_1(iid, EOK, device->handle); |
408 | ipc_answer_1(iid, EOK, device->handle); |
409 | } |
409 | } |
410 | 410 | ||
411 | /** |
411 | /** |
412 | * |
412 | * |
413 | */ |
413 | */ |
414 | static int devmap_device_unregister(ipc_callid_t iid, ipc_call_t *icall, |
414 | static int devmap_device_unregister(ipc_callid_t iid, ipc_call_t *icall, |
415 | devmap_driver_t *driver) |
415 | devmap_driver_t *driver) |
416 | { |
416 | { |
417 | /* TODO */ |
417 | /* TODO */ |
418 | 418 | ||
419 | return EOK; |
419 | return EOK; |
420 | } |
420 | } |
421 | 421 | ||
422 | /** Connect client to the device. |
422 | /** Connect client to the device. |
423 | * Find device driver owning requested device and forward |
423 | * Find device driver owning requested device and forward |
424 | * the message to it. |
424 | * the message to it. |
425 | */ |
425 | */ |
426 | static void devmap_forward(ipc_callid_t callid, ipc_call_t *call) |
426 | static void devmap_forward(ipc_callid_t callid, ipc_call_t *call) |
427 | { |
427 | { |
428 | devmap_device_t *dev; |
428 | devmap_device_t *dev; |
429 | int handle; |
429 | int handle; |
430 | 430 | ||
431 | /* |
431 | /* |
432 | * Get handle from request |
432 | * Get handle from request |
433 | */ |
433 | */ |
434 | handle = IPC_GET_ARG2(*call); |
434 | handle = IPC_GET_ARG2(*call); |
435 | dev = devmap_device_find_handle(handle); |
435 | dev = devmap_device_find_handle(handle); |
436 | 436 | ||
437 | if (NULL == dev) { |
437 | if (NULL == dev) { |
438 | ipc_answer_0(callid, ENOENT); |
438 | ipc_answer_0(callid, ENOENT); |
439 | return; |
439 | return; |
440 | } |
440 | } |
441 | 441 | ||
442 | ipc_forward_fast(callid, dev->driver->phone, (ipcarg_t)(dev->handle), |
442 | ipc_forward_fast(callid, dev->driver->phone, (ipcarg_t)(dev->handle), |
443 | IPC_GET_ARG3(*call), 0, IPC_FF_NONE); |
443 | IPC_GET_ARG3(*call), 0, IPC_FF_NONE); |
444 | } |
444 | } |
445 | 445 | ||
446 | /** Find handle for device instance identified by name. |
446 | /** Find handle for device instance identified by name. |
447 | * In answer will be send EOK and device handle in arg1 or a error |
447 | * In answer will be send EOK and device handle in arg1 or a error |
448 | * code from errno.h. |
448 | * code from errno.h. |
449 | */ |
449 | */ |
450 | static void devmap_get_handle(ipc_callid_t iid, ipc_call_t *icall) |
450 | static void devmap_get_handle(ipc_callid_t iid, ipc_call_t *icall) |
451 | { |
451 | { |
452 | char *name = NULL; |
452 | char *name = NULL; |
453 | size_t name_size; |
453 | size_t name_size; |
454 | const devmap_device_t *dev; |
454 | const devmap_device_t *dev; |
455 | ipc_callid_t callid; |
455 | ipc_callid_t callid; |
456 | ipcarg_t retval; |
456 | ipcarg_t retval; |
457 | 457 | ||
458 | /* |
458 | /* |
459 | * Wait for incoming message with device name (but do not |
459 | * Wait for incoming message with device name (but do not |
460 | * read the name itself until the buffer is allocated). |
460 | * read the name itself until the buffer is allocated). |
461 | */ |
461 | */ |
462 | if (!ipc_data_write_receive(&callid, &name_size)) { |
462 | if (!ipc_data_write_receive(&callid, &name_size)) { |
463 | ipc_answer_0(callid, EREFUSED); |
463 | ipc_answer_0(callid, EREFUSED); |
464 | ipc_answer_0(iid, EREFUSED); |
464 | ipc_answer_0(iid, EREFUSED); |
465 | return; |
465 | return; |
466 | } |
466 | } |
467 | 467 | ||
468 | if (name_size > DEVMAP_NAME_MAXLEN) { |
468 | if (name_size > DEVMAP_NAME_MAXLEN) { |
469 | ipc_answer_0(callid, EINVAL); |
469 | ipc_answer_0(callid, EINVAL); |
470 | ipc_answer_0(iid, EREFUSED); |
470 | ipc_answer_0(iid, EREFUSED); |
471 | return; |
471 | return; |
472 | } |
472 | } |
473 | 473 | ||
474 | /* |
474 | /* |
475 | * Allocate buffer for device name. |
475 | * Allocate buffer for device name. |
476 | */ |
476 | */ |
477 | if (NULL == (name = (char *)malloc(name_size))) { |
477 | if (NULL == (name = (char *)malloc(name_size))) { |
478 | ipc_answer_0(callid, ENOMEM); |
478 | ipc_answer_0(callid, ENOMEM); |
479 | ipc_answer_0(iid, EREFUSED); |
479 | ipc_answer_0(iid, EREFUSED); |
480 | return; |
480 | return; |
481 | } |
481 | } |
482 | 482 | ||
483 | /* |
483 | /* |
484 | * Send confirmation to sender and get data into buffer. |
484 | * Send confirmation to sender and get data into buffer. |
485 | */ |
485 | */ |
486 | if (EOK != (retval = ipc_data_write_finalize(callid, name, |
486 | if (EOK != (retval = ipc_data_write_finalize(callid, name, |
487 | name_size))) { |
487 | name_size))) { |
488 | ipc_answer_0(iid, EREFUSED); |
488 | ipc_answer_0(iid, EREFUSED); |
489 | return; |
489 | return; |
490 | } |
490 | } |
491 | 491 | ||
492 | /* |
492 | /* |
493 | * Find device name in linked list of known devices. |
493 | * Find device name in linked list of known devices. |
494 | */ |
494 | */ |
495 | dev = devmap_device_find_name(name); |
495 | dev = devmap_device_find_name(name); |
496 | 496 | ||
497 | /* |
497 | /* |
498 | * Device was not found. |
498 | * Device was not found. |
499 | */ |
499 | */ |
500 | if (NULL == dev) { |
500 | if (NULL == dev) { |
501 | ipc_answer_0(iid, ENOENT); |
501 | ipc_answer_0(iid, ENOENT); |
502 | return; |
502 | return; |
503 | } |
503 | } |
504 | 504 | ||
505 | ipc_answer_1(iid, EOK, dev->handle); |
505 | ipc_answer_1(iid, EOK, dev->handle); |
506 | } |
506 | } |
507 | 507 | ||
508 | /** Find name of device identified by id and send it to caller. |
508 | /** Find name of device identified by id and send it to caller. |
509 | * |
509 | * |
510 | */ |
510 | */ |
511 | static void devmap_get_name(ipc_callid_t iid, ipc_call_t *icall) |
511 | static void devmap_get_name(ipc_callid_t iid, ipc_call_t *icall) |
512 | { |
512 | { |
513 | const devmap_device_t *device; |
513 | const devmap_device_t *device; |
514 | size_t name_size; |
514 | size_t name_size; |
515 | 515 | ||
516 | device = devmap_device_find_handle(IPC_GET_ARG1(*icall)); |
516 | device = devmap_device_find_handle(IPC_GET_ARG1(*icall)); |
517 | 517 | ||
518 | /* |
518 | /* |
519 | * Device not found. |
519 | * Device not found. |
520 | */ |
520 | */ |
521 | if (NULL == device) { |
521 | if (NULL == device) { |
522 | ipc_answer_0(iid, ENOENT); |
522 | ipc_answer_0(iid, ENOENT); |
523 | return; |
523 | return; |
524 | } |
524 | } |
525 | 525 | ||
526 | ipc_answer_0(iid, EOK); |
526 | ipc_answer_0(iid, EOK); |
527 | 527 | ||
528 | name_size = strlen(device->name); |
528 | name_size = strlen(device->name); |
529 | 529 | ||
530 | 530 | ||
531 | /* FIXME: |
531 | /* FIXME: |
532 | we have no channel from DEVMAP to client -> |
532 | we have no channel from DEVMAP to client -> |
533 | sending must be initiated by client |
533 | sending must be initiated by client |
534 | 534 | ||
535 | int rc = ipc_data_write_send(phone, device->name, name_size); |
535 | int rc = ipc_data_write_send(phone, device->name, name_size); |
536 | if (rc != EOK) { |
536 | if (rc != EOK) { |
537 | async_wait_for(req, NULL); |
537 | async_wait_for(req, NULL); |
538 | return rc; |
538 | return rc; |
539 | } |
539 | } |
540 | */ |
540 | */ |
541 | /* TODO: send name in response */ |
541 | /* TODO: send name in response */ |
542 | } |
542 | } |
543 | 543 | ||
544 | /** Handle connection with device driver. |
544 | /** Handle connection with device driver. |
545 | * |
545 | * |
546 | */ |
546 | */ |
547 | static void devmap_connection_driver(ipc_callid_t iid, ipc_call_t *icall) |
547 | static void devmap_connection_driver(ipc_callid_t iid, ipc_call_t *icall) |
548 | { |
548 | { |
549 | ipc_callid_t callid; |
549 | ipc_callid_t callid; |
550 | ipc_call_t call; |
550 | ipc_call_t call; |
551 | bool cont = true; |
551 | bool cont = true; |
552 | devmap_driver_t *driver = NULL; |
552 | devmap_driver_t *driver = NULL; |
553 | 553 | ||
554 | ipc_answer_0(iid, EOK); |
554 | ipc_answer_0(iid, EOK); |
555 | 555 | ||
556 | devmap_driver_register(&driver); |
556 | devmap_driver_register(&driver); |
557 | 557 | ||
558 | if (NULL == driver) |
558 | if (NULL == driver) |
559 | return; |
559 | return; |
560 | 560 | ||
561 | while (cont) { |
561 | while (cont) { |
562 | callid = async_get_call(&call); |
562 | callid = async_get_call(&call); |
563 | 563 | ||
564 | switch (IPC_GET_METHOD(call)) { |
564 | switch (IPC_GET_METHOD(call)) { |
565 | case IPC_M_PHONE_HUNGUP: |
565 | case IPC_M_PHONE_HUNGUP: |
566 | cont = false; |
566 | cont = false; |
567 | continue; /* Exit thread */ |
567 | continue; /* Exit thread */ |
568 | case DEVMAP_DRIVER_UNREGISTER: |
568 | case DEVMAP_DRIVER_UNREGISTER: |
569 | if (NULL == driver) { |
569 | if (NULL == driver) { |
570 | ipc_answer_0(callid, ENOENT); |
570 | ipc_answer_0(callid, ENOENT); |
571 | } else { |
571 | } else { |
572 | ipc_answer_0(callid, EOK); |
572 | ipc_answer_0(callid, EOK); |
573 | } |
573 | } |
574 | break; |
574 | break; |
575 | case DEVMAP_DEVICE_REGISTER: |
575 | case DEVMAP_DEVICE_REGISTER: |
576 | /* Register one instance of device */ |
576 | /* Register one instance of device */ |
577 | devmap_device_register(callid, &call, driver); |
577 | devmap_device_register(callid, &call, driver); |
578 | break; |
578 | break; |
579 | case DEVMAP_DEVICE_UNREGISTER: |
579 | case DEVMAP_DEVICE_UNREGISTER: |
580 | /* Remove instance of device identified by handler */ |
580 | /* Remove instance of device identified by handler */ |
581 | devmap_device_unregister(callid, &call, driver); |
581 | devmap_device_unregister(callid, &call, driver); |
582 | break; |
582 | break; |
583 | case DEVMAP_DEVICE_GET_HANDLE: |
583 | case DEVMAP_DEVICE_GET_HANDLE: |
584 | devmap_get_handle(callid, &call); |
584 | devmap_get_handle(callid, &call); |
585 | break; |
585 | break; |
586 | case DEVMAP_DEVICE_GET_NAME: |
586 | case DEVMAP_DEVICE_GET_NAME: |
587 | devmap_get_handle(callid, &call); |
587 | devmap_get_handle(callid, &call); |
588 | break; |
588 | break; |
589 | default: |
589 | default: |
590 | if (!(callid & IPC_CALLID_NOTIFICATION)) { |
590 | if (!(callid & IPC_CALLID_NOTIFICATION)) { |
591 | ipc_answer_0(callid, ENOENT); |
591 | ipc_answer_0(callid, ENOENT); |
592 | } |
592 | } |
593 | } |
593 | } |
594 | } |
594 | } |
595 | 595 | ||
596 | if (NULL != driver) { |
596 | if (NULL != driver) { |
597 | /* |
597 | /* |
598 | * Unregister the device driver and all its devices. |
598 | * Unregister the device driver and all its devices. |
599 | */ |
599 | */ |
600 | devmap_driver_unregister(driver); |
600 | devmap_driver_unregister(driver); |
601 | driver = NULL; |
601 | driver = NULL; |
602 | } |
602 | } |
603 | 603 | ||
604 | } |
604 | } |
605 | 605 | ||
606 | /** Handle connection with device client. |
606 | /** Handle connection with device client. |
607 | * |
607 | * |
608 | */ |
608 | */ |
609 | static void devmap_connection_client(ipc_callid_t iid, ipc_call_t *icall) |
609 | static void devmap_connection_client(ipc_callid_t iid, ipc_call_t *icall) |
610 | { |
610 | { |
611 | ipc_callid_t callid; |
611 | ipc_callid_t callid; |
612 | ipc_call_t call; |
612 | ipc_call_t call; |
613 | bool cont = true; |
613 | bool cont = true; |
614 | 614 | ||
615 | ipc_answer_0(iid, EOK); /* Accept connection */ |
615 | ipc_answer_0(iid, EOK); /* Accept connection */ |
616 | 616 | ||
617 | while (cont) { |
617 | while (cont) { |
618 | callid = async_get_call(&call); |
618 | callid = async_get_call(&call); |
619 | 619 | ||
620 | switch (IPC_GET_METHOD(call)) { |
620 | switch (IPC_GET_METHOD(call)) { |
621 | case IPC_M_PHONE_HUNGUP: |
621 | case IPC_M_PHONE_HUNGUP: |
622 | cont = false; |
622 | cont = false; |
623 | continue; /* Exit thread */ |
623 | continue; /* Exit thread */ |
624 | 624 | ||
625 | case DEVMAP_DEVICE_GET_HANDLE: |
625 | case DEVMAP_DEVICE_GET_HANDLE: |
626 | devmap_get_handle(callid, &call); |
626 | devmap_get_handle(callid, &call); |
627 | 627 | ||
628 | break; |
628 | break; |
629 | case DEVMAP_DEVICE_GET_NAME: |
629 | case DEVMAP_DEVICE_GET_NAME: |
630 | /* TODO */ |
630 | /* TODO */ |
631 | devmap_get_name(callid, &call); |
631 | devmap_get_name(callid, &call); |
632 | break; |
632 | break; |
633 | default: |
633 | default: |
634 | if (!(callid & IPC_CALLID_NOTIFICATION)) { |
634 | if (!(callid & IPC_CALLID_NOTIFICATION)) { |
635 | ipc_answer_0(callid, ENOENT); |
635 | ipc_answer_0(callid, ENOENT); |
636 | } |
636 | } |
637 | } |
637 | } |
638 | } |
638 | } |
639 | } |
639 | } |
640 | 640 | ||
641 | /** Function for handling connections to devmap |
641 | /** Function for handling connections to devmap |
642 | * |
642 | * |
643 | */ |
643 | */ |
644 | static void devmap_connection(ipc_callid_t iid, ipc_call_t *icall) |
644 | static void devmap_connection(ipc_callid_t iid, ipc_call_t *icall) |
645 | { |
645 | { |
646 | /* Select interface */ |
646 | /* Select interface */ |
647 | switch ((ipcarg_t) (IPC_GET_ARG1(*icall))) { |
647 | switch ((ipcarg_t) (IPC_GET_ARG1(*icall))) { |
648 | case DEVMAP_DRIVER: |
648 | case DEVMAP_DRIVER: |
649 | devmap_connection_driver(iid, icall); |
649 | devmap_connection_driver(iid, icall); |
650 | break; |
650 | break; |
651 | case DEVMAP_CLIENT: |
651 | case DEVMAP_CLIENT: |
652 | devmap_connection_client(iid, icall); |
652 | devmap_connection_client(iid, icall); |
653 | break; |
653 | break; |
654 | case DEVMAP_CONNECT_TO_DEVICE: |
654 | case DEVMAP_CONNECT_TO_DEVICE: |
655 | /* Connect client to selected device */ |
655 | /* Connect client to selected device */ |
656 | devmap_forward(iid, icall); |
656 | devmap_forward(iid, icall); |
657 | break; |
657 | break; |
658 | default: |
658 | default: |
659 | ipc_answer_0(iid, ENOENT); /* No such interface */ |
659 | ipc_answer_0(iid, ENOENT); /* No such interface */ |
660 | } |
660 | } |
661 | 661 | ||
662 | /* Cleanup */ |
662 | /* Cleanup */ |
663 | } |
663 | } |
664 | 664 | ||
665 | /** |
665 | /** |
666 | * |
666 | * |
667 | */ |
667 | */ |
668 | int main(int argc, char *argv[]) |
668 | int main(int argc, char *argv[]) |
669 | { |
669 | { |
670 | printf(NAME ": HelenOS Device Mapper\n"); |
670 | printf(NAME ": HelenOS Device Mapper\n"); |
671 | 671 | ||
672 | ipcarg_t phonead; |
672 | ipcarg_t phonead; |
673 | 673 | ||
674 | if (devmap_init() != 0) { |
674 | if (devmap_init() != 0) { |
675 | printf(NAME ": Error while initializing service\n"); |
675 | printf(NAME ": Error while initializing service\n"); |
676 | return -1; |
676 | return -1; |
677 | } |
677 | } |
678 | 678 | ||
679 | /* Set a handler of incomming connections */ |
679 | /* Set a handler of incomming connections */ |
680 | async_set_client_connection(devmap_connection); |
680 | async_set_client_connection(devmap_connection); |
681 | 681 | ||
682 | /* Register device mapper at naming service */ |
682 | /* Register device mapper at naming service */ |
683 | if (ipc_connect_to_me(PHONE_NS, SERVICE_DEVMAP, 0, 0, &phonead) != 0) |
683 | if (ipc_connect_to_me(PHONE_NS, SERVICE_DEVMAP, 0, 0, &phonead) != 0) |
684 | return -1; |
684 | return -1; |
685 | 685 | ||
686 | printf(NAME ": Accepting connections\n"); |
686 | printf(NAME ": Accepting connections\n"); |
687 | async_manager(); |
687 | async_manager(); |
688 | /* Never reached */ |
688 | /* Never reached */ |
689 | return 0; |
689 | return 0; |
690 | } |
690 | } |
691 | 691 | ||
692 | /** |
692 | /** |
693 | * @} |
693 | * @} |
694 | */ |
694 | */ |
695 | 695 |