Subversion Repositories HelenOS

Rev

Rev 4327 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1027 palkovsky 1
/*
2071 jermar 2
 * Copyright (c) 2006 Ondrej Palkovsky
1027 palkovsky 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
 
1757 jermar 29
/** @addtogroup genericipc
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
1027 palkovsky 35
#include <arch.h>
36
#include <proc/task.h>
1288 jermar 37
#include <proc/thread.h>
1027 palkovsky 38
#include <errno.h>
39
#include <memstr.h>
40
#include <debug.h>
41
#include <ipc/ipc.h>
42
#include <ipc/sysipc.h>
1281 palkovsky 43
#include <ipc/irq.h>
1072 palkovsky 44
#include <ipc/ipcrsc.h>
4153 mejdrech 45
#include <ipc/kbox.h>
46
#include <udebug/udebug_ipc.h>
1258 palkovsky 47
#include <arch/interrupt.h>
1288 jermar 48
#include <syscall/copy.h>
1297 jermar 49
#include <security/cap.h>
1329 palkovsky 50
#include <mm/as.h>
1875 jermar 51
#include <print.h>
1027 palkovsky 52
 
2660 jermar 53
/**
54
 * Maximum buffer size allowed for IPC_M_DATA_WRITE and IPC_M_DATA_READ
55
 * requests.
56
 */
57
#define DATA_XFER_LIMIT     (64 * 1024)
2494 jermar 58
 
2471 jermar 59
#define GET_CHECK_PHONE(phone, phoneid, err) \
60
{ \
61
    if (phoneid > IPC_MAX_PHONES) { \
62
        err; \
63
    } \
64
    phone = &TASK->phones[phoneid]; \
1084 palkovsky 65
}
66
 
2471 jermar 67
#define STRUCT_TO_USPACE(dst, src)  copy_to_uspace(dst, src, sizeof(*(src)))
1084 palkovsky 68
 
2471 jermar 69
/** Decide if the method is a system method.
70
 *
71
 * @param method    Method to be decided.
72
 *
73
 * @return      Return 1 if the method is a system method.
74
 *          Otherwise return 0.
75
 */
2557 jermar 76
static inline int method_is_system(unative_t method)
1040 palkovsky 77
{
78
    if (method <= IPC_M_LAST_SYSTEM)
79
        return 1;
80
    return 0;
81
}
82
 
2471 jermar 83
/** Decide if the message with this method is forwardable.
1040 palkovsky 84
 *
85
 * - some system messages may be forwarded, for some of them
86
 *   it is useless
2471 jermar 87
 *
88
 * @param method    Method to be decided.
89
 *
90
 * @return      Return 1 if the method is forwardable.
91
 *          Otherwise return 0.
1040 palkovsky 92
 */
2557 jermar 93
static inline int method_is_forwardable(unative_t method)
1040 palkovsky 94
{
2494 jermar 95
    switch (method) {
4581 mejdrech 96
    case IPC_M_CONNECTION_CLONE:
97
    case IPC_M_CONNECT_ME:
2494 jermar 98
    case IPC_M_PHONE_HUNGUP:
99
        /* This message is meant only for the original recipient. */
100
        return 0;
101
    default:
102
        return 1;
103
    }
1040 palkovsky 104
}
105
 
2557 jermar 106
/** Decide if the message with this method is immutable on forward.
107
 *
2601 jermar 108
 * - some system messages may be forwarded but their content cannot be altered
2557 jermar 109
 *
110
 * @param method    Method to be decided.
111
 *
112
 * @return      Return 1 if the method is immutable on forward.
113
 *          Otherwise return 0.
114
 */
115
static inline int method_is_immutable(unative_t method)
116
{
117
    switch (method) {
2677 jermar 118
    case IPC_M_SHARE_OUT:
119
    case IPC_M_SHARE_IN:
2660 jermar 120
    case IPC_M_DATA_WRITE:
121
    case IPC_M_DATA_READ:
2557 jermar 122
        return 1;
123
        break;
124
    default:
125
        return 0;
126
    }
127
}
1027 palkovsky 128
 
2557 jermar 129
 
2471 jermar 130
/***********************************************************************
131
 * Functions that preprocess answer before sending it to the recepient.
132
 ***********************************************************************/
133
 
134
/** Decide if the caller (e.g. ipc_answer()) should save the old call contents
135
 * for answer_preprocess().
136
 *
137
 * @param call      Call structure to be decided.
138
 *
139
 * @return      Return 1 if the old call contents should be saved.
140
 *          Return 0 otherwise.
1027 palkovsky 141
 */
1088 palkovsky 142
static inline int answer_need_old(call_t *call)
1027 palkovsky 143
{
2494 jermar 144
    switch (IPC_GET_METHOD(call->data)) {
4581 mejdrech 145
    case IPC_M_CONNECTION_CLONE:
146
    case IPC_M_CONNECT_ME:
2494 jermar 147
    case IPC_M_CONNECT_TO_ME:
148
    case IPC_M_CONNECT_ME_TO:
2677 jermar 149
    case IPC_M_SHARE_OUT:
150
    case IPC_M_SHARE_IN:
2660 jermar 151
    case IPC_M_DATA_WRITE:
152
    case IPC_M_DATA_READ:
1027 palkovsky 153
        return 1;
2494 jermar 154
    default:
155
        return 0;
156
    }
1027 palkovsky 157
}
158
 
2471 jermar 159
/** Interpret process answer as control information.
1428 palkovsky 160
 *
2471 jermar 161
 * This function is called directly after sys_ipc_answer().
162
 *
163
 * @param answer    Call structure with the answer.
164
 * @param olddata   Saved data of the request.
165
 *
166
 * @return      Return 0 on success or an error code.
1428 palkovsky 167
 */
1329 palkovsky 168
static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata)
1027 palkovsky 169
{
170
    int phoneid;
171
 
2745 decky 172
    if ((native_t) IPC_GET_RETVAL(answer->data) == EHANGUP) {
1141 palkovsky 173
        /* In case of forward, hangup the forwared phone,
174
         * not the originator
175
         */
3020 jermar 176
        mutex_lock(&answer->data.phone->lock);
1141 palkovsky 177
        spinlock_lock(&TASK->answerbox.lock);
1568 palkovsky 178
        if (answer->data.phone->state == IPC_PHONE_CONNECTED) {
1573 palkovsky 179
            list_remove(&answer->data.phone->link);
1568 palkovsky 180
            answer->data.phone->state = IPC_PHONE_SLAMMED;
1141 palkovsky 181
        }
182
        spinlock_unlock(&TASK->answerbox.lock);
3020 jermar 183
        mutex_unlock(&answer->data.phone->lock);
1088 palkovsky 184
    }
185
 
186
    if (!olddata)
1329 palkovsky 187
        return 0;
1088 palkovsky 188
 
4581 mejdrech 189
    if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECTION_CLONE) {
190
        phoneid = IPC_GET_ARG1(*olddata);
191
        phone_t *phone = &TASK->phones[phoneid];
192
        if (IPC_GET_RETVAL(answer->data) != EOK) {
193
            /*
194
             * The recipient of the cloned phone rejected the offer.
195
             * In this case, the connection was established at the
196
             * request time and therefore we need to slam the phone.
197
             * We don't merely hangup as that would result in
198
             * sending IPC_M_HUNGUP to the third party on the
199
             * other side of the cloned phone.
200
             */
201
            mutex_lock(&phone->lock);
202
            if (phone->state == IPC_PHONE_CONNECTED) {
203
                spinlock_lock(&phone->callee->lock);
204
                list_remove(&phone->link);
205
                phone->state = IPC_PHONE_SLAMMED;
206
                spinlock_unlock(&phone->callee->lock);
207
            }
208
            mutex_unlock(&phone->lock);
209
        }
210
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME) {
211
        phone_t *phone = (phone_t *)IPC_GET_ARG5(*olddata);
212
        if (IPC_GET_RETVAL(answer->data) != EOK) {
213
            /*
214
             * The other party on the cloned phoned rejected our
215
             * request for connection on the protocol level.
216
             * We need to break the connection without sending
217
             * IPC_M_HUNGUP back.
218
             */
219
            mutex_lock(&phone->lock);
220
            if (phone->state == IPC_PHONE_CONNECTED) {
221
                spinlock_lock(&phone->callee->lock);
222
                list_remove(&phone->link);
223
                phone->state = IPC_PHONE_SLAMMED;
224
                spinlock_unlock(&phone->callee->lock);
225
            }
226
            mutex_unlock(&phone->lock);
227
        }
228
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {
2637 cejka 229
        phoneid = IPC_GET_ARG5(*olddata);
4581 mejdrech 230
        if (IPC_GET_RETVAL(answer->data) != EOK) {
1027 palkovsky 231
            /* The connection was not accepted */
232
            phone_dealloc(phoneid);
1040 palkovsky 233
        } else {
1090 palkovsky 234
            /* The connection was accepted */
2359 jermar 235
            phone_connect(phoneid, &answer->sender->answerbox);
2638 jermar 236
            /* Set 'phone hash' as arg5 of response */
2637 cejka 237
            IPC_SET_ARG5(answer->data,
2359 jermar 238
                (unative_t) &TASK->phones[phoneid]);
1027 palkovsky 239
        }
1086 palkovsky 240
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {
1060 palkovsky 241
        /* If the users accepted call, connect */
4581 mejdrech 242
        if (IPC_GET_RETVAL(answer->data) == EOK) {
2635 cejka 243
            ipc_phone_connect((phone_t *) IPC_GET_ARG5(*olddata),
2359 jermar 244
                &TASK->answerbox);
1060 palkovsky 245
        }
2677 jermar 246
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_OUT) {
2359 jermar 247
        if (!IPC_GET_RETVAL(answer->data)) {
248
            /* Accepted, handle as_area receipt */
1413 jermar 249
            ipl_t ipl;
1461 palkovsky 250
            int rc;
1413 jermar 251
            as_t *as;
252
 
253
            ipl = interrupts_disable();
254
            spinlock_lock(&answer->sender->lock);
255
            as = answer->sender->as;
256
            spinlock_unlock(&answer->sender->lock);
257
            interrupts_restore(ipl);
258
 
2359 jermar 259
            rc = as_area_share(as, IPC_GET_ARG1(*olddata),
260
                IPC_GET_ARG2(*olddata), AS,
261
                IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));
1461 palkovsky 262
            IPC_SET_RETVAL(answer->data, rc);
263
            return rc;
1329 palkovsky 264
        }
2677 jermar 265
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_IN) {
1428 palkovsky 266
        if (!IPC_GET_RETVAL(answer->data)) {
267
            ipl_t ipl;
268
            as_t *as;
1434 palkovsky 269
            int rc;
1428 palkovsky 270
 
271
            ipl = interrupts_disable();
272
            spinlock_lock(&answer->sender->lock);
273
            as = answer->sender->as;
274
            spinlock_unlock(&answer->sender->lock);
275
            interrupts_restore(ipl);
276
 
2359 jermar 277
            rc = as_area_share(AS, IPC_GET_ARG1(answer->data),
278
                IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata),
279
                IPC_GET_ARG2(answer->data));
1434 palkovsky 280
            IPC_SET_RETVAL(answer->data, rc);
1428 palkovsky 281
        }
2662 jermar 282
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_READ) {
283
        ASSERT(!answer->buffer);
284
        if (!IPC_GET_RETVAL(answer->data)) {
285
            /* The recipient agreed to send data. */
286
            uintptr_t src = IPC_GET_ARG1(answer->data);
287
            uintptr_t dst = IPC_GET_ARG1(*olddata);
288
            size_t max_size = IPC_GET_ARG2(*olddata);
289
            size_t size = IPC_GET_ARG2(answer->data);
2934 jermar 290
            if (size && size <= max_size) {
2662 jermar 291
                /*
292
                 * Copy the destination VA so that this piece of
293
                 * information is not lost.
294
                 */
295
                IPC_SET_ARG1(answer->data, dst);
296
 
297
                answer->buffer = malloc(size, 0);
298
                int rc = copy_from_uspace(answer->buffer,
299
                    (void *) src, size);
300
                if (rc) {
301
                    IPC_SET_RETVAL(answer->data, rc);
302
                    free(answer->buffer);
303
                    answer->buffer = NULL;
304
                }
2934 jermar 305
            } else if (!size) {
306
                IPC_SET_RETVAL(answer->data, EOK);
2662 jermar 307
            } else {
308
                IPC_SET_RETVAL(answer->data, ELIMIT);
309
            }
310
        }
2660 jermar 311
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_WRITE) {
2661 jermar 312
        ASSERT(answer->buffer);
2494 jermar 313
        if (!IPC_GET_RETVAL(answer->data)) {
2662 jermar 314
            /* The recipient agreed to receive data. */
2494 jermar 315
            int rc;
316
            uintptr_t dst;
3332 jermar 317
            size_t size;
318
            size_t max_size;
2494 jermar 319
 
3332 jermar 320
            dst = (uintptr_t)IPC_GET_ARG1(answer->data);
321
            size = (size_t)IPC_GET_ARG2(answer->data);
322
            max_size = (size_t)IPC_GET_ARG2(*olddata);
2494 jermar 323
 
2662 jermar 324
            if (size <= max_size) {
325
                rc = copy_to_uspace((void *) dst,
326
                    answer->buffer, size);
327
                if (rc)
328
                    IPC_SET_RETVAL(answer->data, rc);
329
            } else {
330
                IPC_SET_RETVAL(answer->data, ELIMIT);
331
            }
2494 jermar 332
        }
2661 jermar 333
        free(answer->buffer);
334
        answer->buffer = NULL;
1027 palkovsky 335
    }
1329 palkovsky 336
    return 0;
1027 palkovsky 337
}
338
 
4581 mejdrech 339
static void phones_lock(phone_t *p1, phone_t *p2)
340
{
341
    if (p1 < p2) {
342
        mutex_lock(&p1->lock);
343
        mutex_lock(&p2->lock);
344
    } else if (p1 > p2) {
345
        mutex_lock(&p2->lock);
346
        mutex_lock(&p1->lock);
347
    } else {
348
        mutex_lock(&p1->lock);
349
    }
350
}
351
 
352
static void phones_unlock(phone_t *p1, phone_t *p2)
353
{
354
    mutex_unlock(&p1->lock);
355
    if (p1 != p2)
356
        mutex_unlock(&p2->lock);
357
}
358
 
2471 jermar 359
/** Called before the request is sent.
1090 palkovsky 360
 *
2471 jermar 361
 * @param call      Call structure with the request.
4153 mejdrech 362
 * @param phone     Phone that the call will be sent through.
2471 jermar 363
 *
364
 * @return      Return 0 on success, ELIMIT or EPERM on error.
1090 palkovsky 365
 */
4153 mejdrech 366
static int request_preprocess(call_t *call, phone_t *phone)
1090 palkovsky 367
{
368
    int newphid;
1329 palkovsky 369
    size_t size;
2494 jermar 370
    uintptr_t src;
371
    int rc;
1090 palkovsky 372
 
373
    switch (IPC_GET_METHOD(call->data)) {
4581 mejdrech 374
    case IPC_M_CONNECTION_CLONE: {
375
        phone_t *cloned_phone;
376
        GET_CHECK_PHONE(cloned_phone, IPC_GET_ARG1(call->data),
377
            return ENOENT);
378
        phones_lock(cloned_phone, phone);
379
        if ((cloned_phone->state != IPC_PHONE_CONNECTED) ||
380
            phone->state != IPC_PHONE_CONNECTED) {
381
            phones_unlock(cloned_phone, phone);
382
            return EINVAL;
383
        }
384
        /*
385
         * We can be pretty sure now that both tasks exist and we are
386
         * connected to them. As we continue to hold the phone locks,
387
         * we are effectively preventing them from finishing their
388
         * potential cleanup.
389
         */
390
        newphid = phone_alloc(phone->callee->task);
391
        if (newphid < 0) {
392
            phones_unlock(cloned_phone, phone);
393
            return ELIMIT;
394
        }
395
        ipc_phone_connect(&phone->callee->task->phones[newphid],
396
            cloned_phone->callee);
397
        phones_unlock(cloned_phone, phone);
398
        /* Set the new phone for the callee. */
399
        IPC_SET_ARG1(call->data, newphid);
400
        break;
401
    }
402
    case IPC_M_CONNECT_ME:
403
        IPC_SET_ARG5(call->data, (unative_t) phone);
404
        break;
1090 palkovsky 405
    case IPC_M_CONNECT_ME_TO:
4581 mejdrech 406
        newphid = phone_alloc(TASK);
1090 palkovsky 407
        if (newphid < 0)
408
            return ELIMIT;
2638 jermar 409
        /* Set arg5 for server */
2635 cejka 410
        IPC_SET_ARG5(call->data, (unative_t) &TASK->phones[newphid]);
1090 palkovsky 411
        call->flags |= IPC_CALL_CONN_ME_TO;
2098 decky 412
        call->priv = newphid;
1090 palkovsky 413
        break;
2677 jermar 414
    case IPC_M_SHARE_OUT:
2556 jermar 415
        size = as_area_get_size(IPC_GET_ARG1(call->data));
2471 jermar 416
        if (!size)
1329 palkovsky 417
            return EPERM;
1417 jermar 418
        IPC_SET_ARG2(call->data, size);
1329 palkovsky 419
        break;
2662 jermar 420
    case IPC_M_DATA_READ:
421
        size = IPC_GET_ARG2(call->data);
422
        if ((size <= 0 || (size > DATA_XFER_LIMIT)))
423
            return ELIMIT;
424
        break;
2660 jermar 425
    case IPC_M_DATA_WRITE:
2676 jermar 426
        src = IPC_GET_ARG1(call->data);
427
        size = IPC_GET_ARG2(call->data);
2494 jermar 428
 
4327 mejdrech 429
        if (size > DATA_XFER_LIMIT)
2494 jermar 430
            return ELIMIT;
431
 
432
        call->buffer = (uint8_t *) malloc(size, 0);
433
        rc = copy_from_uspace(call->buffer, (void *) src, size);
434
        if (rc != 0) {
435
            free(call->buffer);
436
            return rc;
437
        }
438
        break;
4153 mejdrech 439
#ifdef CONFIG_UDEBUG
440
    case IPC_M_DEBUG_ALL:
441
        return udebug_request_preprocess(call, phone);
442
#endif
1090 palkovsky 443
    default:
444
        break;
445
    }
446
    return 0;
447
}
448
 
2471 jermar 449
/*******************************************************************************
450
 * Functions called to process received call/answer before passing it to uspace.
451
 *******************************************************************************/
452
 
453
/** Do basic kernel processing of received call answer.
454
 *
455
 * @param call      Call structure with the answer.
1027 palkovsky 456
 */
1090 palkovsky 457
static void process_answer(call_t *call)
1027 palkovsky 458
{
2745 decky 459
    if (((native_t) IPC_GET_RETVAL(call->data) == EHANGUP) &&
2359 jermar 460
        (call->flags & IPC_CALL_FORWARDED))
1088 palkovsky 461
        IPC_SET_RETVAL(call->data, EFORWARD);
1090 palkovsky 462
 
463
    if (call->flags & IPC_CALL_CONN_ME_TO) {
464
        if (IPC_GET_RETVAL(call->data))
2098 decky 465
            phone_dealloc(call->priv);
1090 palkovsky 466
        else
2635 cejka 467
            IPC_SET_ARG5(call->data, call->priv);
1090 palkovsky 468
    }
2662 jermar 469
 
470
    if (call->buffer) {
471
        /* This must be an affirmative answer to IPC_M_DATA_READ. */
4153 mejdrech 472
        /* or IPC_M_DEBUG_ALL/UDEBUG_M_MEM_READ... */
2662 jermar 473
        uintptr_t dst = IPC_GET_ARG1(call->data);
474
        size_t size = IPC_GET_ARG2(call->data);
475
        int rc = copy_to_uspace((void *) dst, call->buffer, size);
476
        if (rc)
477
            IPC_SET_RETVAL(call->data, rc);
478
        free(call->buffer);
479
        call->buffer = NULL;
480
    }
1027 palkovsky 481
}
482
 
2471 jermar 483
/** Do basic kernel processing of received call request.
1027 palkovsky 484
 *
2471 jermar 485
 * @param box       Destination answerbox structure.
486
 * @param call      Call structure with the request.
487
 *
488
 * @return      Return 0 if the call should be passed to userspace.
489
 *          Return -1 if the call should be ignored.
1027 palkovsky 490
 */
2359 jermar 491
static int process_request(answerbox_t *box, call_t *call)
1027 palkovsky 492
{
493
    int phoneid;
494
 
1086 palkovsky 495
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {
4581 mejdrech 496
        phoneid = phone_alloc(TASK);
1027 palkovsky 497
        if (phoneid < 0) { /* Failed to allocate phone */
498
            IPC_SET_RETVAL(call->data, ELIMIT);
2471 jermar 499
            ipc_answer(box, call);
1027 palkovsky 500
            return -1;
501
        }
2637 cejka 502
        IPC_SET_ARG5(call->data, phoneid);
4153 mejdrech 503
    }
504
    switch (IPC_GET_METHOD(call->data)) {
505
    case IPC_M_DEBUG_ALL:
506
        return -1;
507
    default:
508
        break;
509
    }
1027 palkovsky 510
    return 0;
511
}
512
 
2471 jermar 513
/** Make a fast call over IPC, wait for reply and return to user.
1027 palkovsky 514
 *
2615 jermar 515
 * This function can handle only three arguments of payload, but is faster than
516
 * the generic function (i.e. sys_ipc_call_sync_slow()).
2471 jermar 517
 *
518
 * @param phoneid   Phone handle for the call.
519
 * @param method    Method of the call.
520
 * @param arg1      Service-defined payload argument.
2615 jermar 521
 * @param arg2      Service-defined payload argument.
522
 * @param arg3      Service-defined payload argument.
2471 jermar 523
 * @param data      Address of userspace structure where the reply call will
524
 *          be stored.
525
 *
526
 * @return      Returns 0 on success.
527
 *          Return ENOENT if there is no such phone handle.
1027 palkovsky 528
 */
2359 jermar 529
unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method,
2615 jermar 530
    unative_t arg1, unative_t arg2, unative_t arg3, ipc_data_t *data)
1027 palkovsky 531
{
532
    call_t call;
533
    phone_t *phone;
1090 palkovsky 534
    int res;
2617 jermar 535
    int rc;
3054 decky 536
 
1084 palkovsky 537
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
1027 palkovsky 538
 
1084 palkovsky 539
    ipc_call_static_init(&call);
1027 palkovsky 540
    IPC_SET_METHOD(call.data, method);
541
    IPC_SET_ARG1(call.data, arg1);
2615 jermar 542
    IPC_SET_ARG2(call.data, arg2);
543
    IPC_SET_ARG3(call.data, arg3);
2620 jermar 544
    /*
545
     * To achieve deterministic behavior, zero out arguments that are beyond
546
     * the limits of the fast version.
547
     */
548
    IPC_SET_ARG4(call.data, 0);
549
    IPC_SET_ARG5(call.data, 0);
1027 palkovsky 550
 
4153 mejdrech 551
    if (!(res = request_preprocess(&call, phone))) {
552
#ifdef CONFIG_UDEBUG
553
        udebug_stoppable_begin();
554
#endif
3370 jermar 555
        rc = ipc_call_sync(phone, &call);
4153 mejdrech 556
#ifdef CONFIG_UDEBUG
557
        udebug_stoppable_end();
558
#endif
3370 jermar 559
        if (rc != EOK)
560
            return rc;
1090 palkovsky 561
        process_answer(&call);
4153 mejdrech 562
 
2471 jermar 563
    } else {
1090 palkovsky 564
        IPC_SET_RETVAL(call.data, res);
2471 jermar 565
    }
2617 jermar 566
    rc = STRUCT_TO_USPACE(&data->args, &call.data.args);
567
    if (rc != 0)
568
        return rc;
1027 palkovsky 569
 
570
    return 0;
571
}
572
 
2471 jermar 573
/** Make a synchronous IPC call allowing to transmit the entire payload.
574
 *
575
 * @param phoneid   Phone handle for the call.
576
 * @param question  Userspace address of call data with the request.
2494 jermar 577
 * @param reply     Userspace address of call data where to store the
578
 *          answer.
2471 jermar 579
 *
580
 * @return      Zero on success or an error code.
581
 */
2615 jermar 582
unative_t sys_ipc_call_sync_slow(unative_t phoneid, ipc_data_t *question,
2359 jermar 583
    ipc_data_t *reply)
1027 palkovsky 584
{
585
    call_t call;
586
    phone_t *phone;
1090 palkovsky 587
    int res;
1288 jermar 588
    int rc;
1027 palkovsky 589
 
1084 palkovsky 590
    ipc_call_static_init(&call);
2359 jermar 591
    rc = copy_from_uspace(&call.data.args, &question->args,
592
        sizeof(call.data.args));
1288 jermar 593
    if (rc != 0)
1780 jermar 594
        return (unative_t) rc;
1040 palkovsky 595
 
1084 palkovsky 596
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
1072 palkovsky 597
 
4153 mejdrech 598
    if (!(res = request_preprocess(&call, phone))) {
599
#ifdef CONFIG_UDEBUG
600
        udebug_stoppable_begin();
601
#endif
3370 jermar 602
        rc = ipc_call_sync(phone, &call);
4153 mejdrech 603
#ifdef CONFIG_UDEBUG
604
        udebug_stoppable_end();
605
#endif
3370 jermar 606
        if (rc != EOK)
607
            return rc;
1090 palkovsky 608
        process_answer(&call);
609
    } else
610
        IPC_SET_RETVAL(call.data, res);
1027 palkovsky 611
 
1288 jermar 612
    rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);
613
    if (rc != 0)
614
        return rc;
1027 palkovsky 615
 
616
    return 0;
617
}
618
 
2471 jermar 619
/** Check that the task did not exceed the allowed limit of asynchronous calls.
1027 palkovsky 620
 *
2471 jermar 621
 * @return      Return 0 if limit not reached or -1 if limit exceeded.
1027 palkovsky 622
 */
623
static int check_call_limit(void)
624
{
625
    if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {
626
        atomic_dec(&TASK->active_calls);
627
        return -1;
628
    }
629
    return 0;
630
}
631
 
2471 jermar 632
/** Make a fast asynchronous call over IPC.
1027 palkovsky 633
 *
2618 jermar 634
 * This function can only handle four arguments of payload, but is faster than
635
 * the generic function sys_ipc_call_async_slow().
2471 jermar 636
 *
637
 * @param phoneid   Phone handle for the call.
638
 * @param method    Method of the call.
639
 * @param arg1      Service-defined payload argument.
640
 * @param arg2      Service-defined payload argument.
2618 jermar 641
 * @param arg3      Service-defined payload argument.
642
 * @param arg4      Service-defined payload argument.
2471 jermar 643
 *
644
 * @return      Return call hash on success.
645
 *          Return IPC_CALLRET_FATAL in case of a fatal error and
646
 *          IPC_CALLRET_TEMPORARY if there are too many pending
647
 *          asynchronous requests; answers should be handled first.
1027 palkovsky 648
 */
2359 jermar 649
unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method,
2618 jermar 650
    unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4)
1027 palkovsky 651
{
652
    call_t *call;
653
    phone_t *phone;
1090 palkovsky 654
    int res;
1027 palkovsky 655
 
656
    if (check_call_limit())
657
        return IPC_CALLRET_TEMPORARY;
658
 
1090 palkovsky 659
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
1072 palkovsky 660
 
1258 palkovsky 661
    call = ipc_call_alloc(0);
1027 palkovsky 662
    IPC_SET_METHOD(call->data, method);
663
    IPC_SET_ARG1(call->data, arg1);
664
    IPC_SET_ARG2(call->data, arg2);
2618 jermar 665
    IPC_SET_ARG3(call->data, arg3);
666
    IPC_SET_ARG4(call->data, arg4);
2620 jermar 667
    /*
668
     * To achieve deterministic behavior, zero out arguments that are beyond
669
     * the limits of the fast version.
670
     */
671
    IPC_SET_ARG5(call->data, 0);
1027 palkovsky 672
 
4153 mejdrech 673
    if (!(res = request_preprocess(call, phone)))
1090 palkovsky 674
        ipc_call(phone, call);
675
    else
676
        ipc_backsend_err(phone, call, res);
1027 palkovsky 677
 
1780 jermar 678
    return (unative_t) call;
1027 palkovsky 679
}
680
 
2471 jermar 681
/** Make an asynchronous IPC call allowing to transmit the entire payload.
1027 palkovsky 682
 *
2471 jermar 683
 * @param phoneid   Phone handle for the call.
684
 * @param data      Userspace address of call data with the request.
685
 *
686
 * @return      See sys_ipc_call_async_fast().
1027 palkovsky 687
 */
2618 jermar 688
unative_t sys_ipc_call_async_slow(unative_t phoneid, ipc_data_t *data)
1027 palkovsky 689
{
690
    call_t *call;
691
    phone_t *phone;
1090 palkovsky 692
    int res;
1288 jermar 693
    int rc;
1027 palkovsky 694
 
1072 palkovsky 695
    if (check_call_limit())
696
        return IPC_CALLRET_TEMPORARY;
697
 
1090 palkovsky 698
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
1027 palkovsky 699
 
1258 palkovsky 700
    call = ipc_call_alloc(0);
2359 jermar 701
    rc = copy_from_uspace(&call->data.args, &data->args,
702
        sizeof(call->data.args));
1293 palkovsky 703
    if (rc != 0) {
704
        ipc_call_free(call);
1780 jermar 705
        return (unative_t) rc;
1293 palkovsky 706
    }
4153 mejdrech 707
    if (!(res = request_preprocess(call, phone)))
1090 palkovsky 708
        ipc_call(phone, call);
709
    else
710
        ipc_backsend_err(phone, call, res);
1040 palkovsky 711
 
1780 jermar 712
    return (unative_t) call;
1027 palkovsky 713
}
714
 
4153 mejdrech 715
/** Forward a received call to another destination - common code for both the
716
 * fast and the slow version.
1040 palkovsky 717
 *
2471 jermar 718
 * @param callid    Hash of the call to forward.
719
 * @param phoneid   Phone handle to use for forwarding.
720
 * @param method    New method to use for the forwarded call.
721
 * @param arg1      New value of the first argument for the forwarded call.
2636 jermar 722
 * @param arg2      New value of the second argument for the forwarded call.
4153 mejdrech 723
 * @param arg3      New value of the third argument for the forwarded call.
724
 * @param arg4      New value of the fourth argument for the forwarded call.
725
 * @param arg5      New value of the fifth argument for the forwarded call.
2622 jermar 726
 * @param mode      Flags that specify mode of the forward operation.
4153 mejdrech 727
 * @param slow      If true, arg3, arg4 and arg5 are considered. Otherwise
728
 *          the function considers only the fast version arguments:
729
 *          i.e. arg1 and arg2.
1060 palkovsky 730
 *
2471 jermar 731
 * @return      Return 0 on succes, otherwise return an error code.
732
 *
4153 mejdrech 733
 * Warning: Make sure that ARG5 is not rewritten for certain system IPC
1040 palkovsky 734
 */
4153 mejdrech 735
static unative_t sys_ipc_forward_common(unative_t callid, unative_t phoneid,
736
    unative_t method, unative_t arg1, unative_t arg2, unative_t arg3,
737
    unative_t arg4, unative_t arg5, int mode, bool slow)
1040 palkovsky 738
{
739
    call_t *call;
740
    phone_t *phone;
741
 
742
    call = get_call(callid);
743
    if (!call)
744
        return ENOENT;
4153 mejdrech 745
 
1088 palkovsky 746
    call->flags |= IPC_CALL_FORWARDED;
747
 
1084 palkovsky 748
    GET_CHECK_PHONE(phone, phoneid, {
1040 palkovsky 749
        IPC_SET_RETVAL(call->data, EFORWARD);
750
        ipc_answer(&TASK->answerbox, call);
751
        return ENOENT;
3054 decky 752
    });
1040 palkovsky 753
 
2557 jermar 754
    if (!method_is_forwardable(IPC_GET_METHOD(call->data))) {
1040 palkovsky 755
        IPC_SET_RETVAL(call->data, EFORWARD);
756
        ipc_answer(&TASK->answerbox, call);
757
        return EPERM;
758
    }
759
 
2557 jermar 760
    /*
761
     * Userspace is not allowed to change method of system methods on
4153 mejdrech 762
     * forward, allow changing ARG1, ARG2, ARG3 and ARG4 by means of method,
763
     * arg1, arg2 and arg3.
2557 jermar 764
     * If the method is immutable, don't change anything.
1040 palkovsky 765
     */
2557 jermar 766
    if (!method_is_immutable(IPC_GET_METHOD(call->data))) {
767
        if (method_is_system(IPC_GET_METHOD(call->data))) {
768
            if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
2635 cejka 769
                phone_dealloc(IPC_GET_ARG5(call->data));
1090 palkovsky 770
 
2557 jermar 771
            IPC_SET_ARG1(call->data, method);
772
            IPC_SET_ARG2(call->data, arg1);
2635 cejka 773
            IPC_SET_ARG3(call->data, arg2);
4153 mejdrech 774
            if (slow) {
775
                IPC_SET_ARG4(call->data, arg3);
776
                /*
777
                 * For system methods we deliberately don't
778
                 * overwrite ARG5.
779
                 */
780
            }
2557 jermar 781
        } else {
782
            IPC_SET_METHOD(call->data, method);
783
            IPC_SET_ARG1(call->data, arg1);
2635 cejka 784
            IPC_SET_ARG2(call->data, arg2);
4153 mejdrech 785
            if (slow) {
786
                IPC_SET_ARG3(call->data, arg3);
787
                IPC_SET_ARG4(call->data, arg4);
788
                IPC_SET_ARG5(call->data, arg5);
789
            }
2557 jermar 790
        }
1040 palkovsky 791
    }
792
 
2622 jermar 793
    return ipc_forward(call, phone, &TASK->answerbox, mode);
1040 palkovsky 794
}
795
 
4153 mejdrech 796
/** Forward a received call to another destination - fast version.
797
 *
798
 * @param callid    Hash of the call to forward.
799
 * @param phoneid   Phone handle to use for forwarding.
800
 * @param method    New method to use for the forwarded call.
801
 * @param arg1      New value of the first argument for the forwarded call.
802
 * @param arg2      New value of the second argument for the forwarded call.
803
 * @param mode      Flags that specify mode of the forward operation.
804
 *
805
 * @return      Return 0 on succes, otherwise return an error code.
806
 *
807
 * In case the original method is a system method, ARG1, ARG2 and ARG3 are
808
 * overwritten in the forwarded message with the new method and the new
809
 * arg1 and arg2, respectively. Otherwise the METHOD, ARG1 and ARG2 are
810
 * rewritten with the new method, arg1 and arg2, respectively. Also note there
811
 * is a set of immutable methods, for which the new method and arguments are not
812
 * set and these values are ignored.
813
 */
814
unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid,
815
    unative_t method, unative_t arg1, unative_t arg2, int mode)
816
{
817
    return sys_ipc_forward_common(callid, phoneid, method, arg1, arg2, 0, 0,
818
        0, mode, false);
819
}
820
 
821
/** Forward a received call to another destination - slow version.
822
 *
823
 * @param callid    Hash of the call to forward.
824
 * @param phoneid   Phone handle to use for forwarding.
825
 * @param data      Userspace address of the new IPC data.
826
 * @param mode      Flags that specify mode of the forward operation.
827
 *
828
 * @return      Return 0 on succes, otherwise return an error code.
829
 *
830
 * This function is the slow verision of the sys_ipc_forward_fast interface.
831
 * It can copy all five new arguments and the new method from the userspace.
832
 * It naturally extends the functionality of the fast version. For system
833
 * methods, it additionally stores the new value of arg3 to ARG4. For non-system
834
 * methods, it additionally stores the new value of arg3, arg4 and arg5,
835
 * respectively, to ARG3, ARG4 and ARG5, respectively.
836
 */
837
unative_t sys_ipc_forward_slow(unative_t callid, unative_t phoneid,
838
    ipc_data_t *data, int mode)
839
{
840
    ipc_data_t newdata;
841
    int rc;
842
 
843
    rc = copy_from_uspace(&newdata.args, &data->args,
844
        sizeof(newdata.args));
845
    if (rc != 0)
846
        return (unative_t) rc;
847
 
848
    return sys_ipc_forward_common(callid, phoneid,
849
        IPC_GET_METHOD(newdata), IPC_GET_ARG1(newdata),
850
        IPC_GET_ARG2(newdata), IPC_GET_ARG3(newdata),
851
        IPC_GET_ARG4(newdata), IPC_GET_ARG5(newdata), mode, true);
852
}
853
 
2471 jermar 854
/** Answer an IPC call - fast version.
855
 *
856
 * This function can handle only two return arguments of payload, but is faster
857
 * than the generic sys_ipc_answer().
858
 *
859
 * @param callid    Hash of the call to be answered.
860
 * @param retval    Return value of the answer.
861
 * @param arg1      Service-defined return value.
862
 * @param arg2      Service-defined return value.
2619 jermar 863
 * @param arg3      Service-defined return value.
864
 * @param arg4      Service-defined return value.
2471 jermar 865
 *
866
 * @return      Return 0 on success, otherwise return an error code.   
867
 */
2359 jermar 868
unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval,
2619 jermar 869
    unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4)
1027 palkovsky 870
{
871
    call_t *call;
1040 palkovsky 872
    ipc_data_t saved_data;
1088 palkovsky 873
    int saveddata = 0;
1329 palkovsky 874
    int rc;
1027 palkovsky 875
 
1346 palkovsky 876
    /* Do not answer notification callids */
877
    if (callid & IPC_CALLID_NOTIFICATION)
878
        return 0;
879
 
1040 palkovsky 880
    call = get_call(callid);
881
    if (!call)
882
        return ENOENT;
1027 palkovsky 883
 
1088 palkovsky 884
    if (answer_need_old(call)) {
1040 palkovsky 885
        memcpy(&saved_data, &call->data, sizeof(call->data));
1088 palkovsky 886
        saveddata = 1;
1027 palkovsky 887
    }
888
 
889
    IPC_SET_RETVAL(call->data, retval);
890
    IPC_SET_ARG1(call->data, arg1);
891
    IPC_SET_ARG2(call->data, arg2);
2619 jermar 892
    IPC_SET_ARG3(call->data, arg3);
893
    IPC_SET_ARG4(call->data, arg4);
2620 jermar 894
    /*
895
     * To achieve deterministic behavior, zero out arguments that are beyond
896
     * the limits of the fast version.
897
     */
898
    IPC_SET_ARG5(call->data, 0);
1329 palkovsky 899
    rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
1040 palkovsky 900
 
1027 palkovsky 901
    ipc_answer(&TASK->answerbox, call);
1329 palkovsky 902
    return rc;
1027 palkovsky 903
}
904
 
2471 jermar 905
/** Answer an IPC call.
906
 *
907
 * @param callid    Hash of the call to be answered.
908
 * @param data      Userspace address of call data with the answer.
909
 *
910
 * @return      Return 0 on success, otherwise return an error code.
911
 */
2619 jermar 912
unative_t sys_ipc_answer_slow(unative_t callid, ipc_data_t *data)
1027 palkovsky 913
{
914
    call_t *call;
1040 palkovsky 915
    ipc_data_t saved_data;
1088 palkovsky 916
    int saveddata = 0;
1288 jermar 917
    int rc;
1027 palkovsky 918
 
1346 palkovsky 919
    /* Do not answer notification callids */
920
    if (callid & IPC_CALLID_NOTIFICATION)
921
        return 0;
922
 
1040 palkovsky 923
    call = get_call(callid);
924
    if (!call)
925
        return ENOENT;
1027 palkovsky 926
 
1088 palkovsky 927
    if (answer_need_old(call)) {
1040 palkovsky 928
        memcpy(&saved_data, &call->data, sizeof(call->data));
1088 palkovsky 929
        saveddata = 1;
1027 palkovsky 930
    }
1288 jermar 931
    rc = copy_from_uspace(&call->data.args, &data->args,
2359 jermar 932
        sizeof(call->data.args));
1288 jermar 933
    if (rc != 0)
934
        return rc;
1027 palkovsky 935
 
1329 palkovsky 936
    rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
1027 palkovsky 937
 
938
    ipc_answer(&TASK->answerbox, call);
939
 
1329 palkovsky 940
    return rc;
1027 palkovsky 941
}
942
 
2471 jermar 943
/** Hang up a phone.
1086 palkovsky 944
 *
2471 jermar 945
 * @param       Phone handle of the phone to be hung up.
946
 *
947
 * @return      Return 0 on success or an error code.
1086 palkovsky 948
 */
1780 jermar 949
unative_t sys_ipc_hangup(int phoneid)
1086 palkovsky 950
{
951
    phone_t *phone;
952
 
953
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
954
 
1591 palkovsky 955
    if (ipc_phone_hangup(phone))
1086 palkovsky 956
        return -1;
957
 
958
    return 0;
959
}
960
 
2471 jermar 961
/** Wait for an incoming IPC call or an answer.
1027 palkovsky 962
 *
2359 jermar 963
 * @param calldata  Pointer to buffer where the call/answer data is stored.
964
 * @param usec      Timeout. See waitq_sleep_timeout() for explanation.
965
 * @param flags     Select mode of sleep operation. See waitq_sleep_timeout()
966
 *          for explanation.
1364 jermar 967
 *
2471 jermar 968
 * @return      Hash of the call.
969
 *          If IPC_CALLID_NOTIFICATION bit is set in the hash, the
970
 *          call is a notification. IPC_CALLID_ANSWERED denotes an
971
 *          answer.
1027 palkovsky 972
 */
1780 jermar 973
unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags)
1027 palkovsky 974
{
975
    call_t *call;
976
 
4153 mejdrech 977
restart:
978
 
979
#ifdef CONFIG_UDEBUG
980
    udebug_stoppable_begin();
981
#endif  
2359 jermar 982
    call = ipc_wait_for_call(&TASK->answerbox, usec,
983
        flags | SYNCH_FLAGS_INTERRUPTIBLE);
4153 mejdrech 984
 
985
#ifdef CONFIG_UDEBUG
986
    udebug_stoppable_end();
987
#endif
1088 palkovsky 988
    if (!call)
989
        return 0;
1027 palkovsky 990
 
1258 palkovsky 991
    if (call->flags & IPC_CALL_NOTIF) {
992
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
1693 palkovsky 993
 
994
        /* Set in_phone_hash to the interrupt counter */
2098 decky 995
        call->data.phone = (void *) call->priv;
1693 palkovsky 996
 
997
        STRUCT_TO_USPACE(calldata, &call->data);
998
 
1258 palkovsky 999
        ipc_call_free(call);
1000
 
2471 jermar 1001
        return ((unative_t) call) | IPC_CALLID_NOTIFICATION;
1258 palkovsky 1002
    }
1003
 
1027 palkovsky 1004
    if (call->flags & IPC_CALL_ANSWERED) {
1090 palkovsky 1005
        process_answer(call);
1027 palkovsky 1006
 
1086 palkovsky 1007
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
1008
 
1009
        if (call->flags & IPC_CALL_DISCARD_ANSWER) {
1010
            ipc_call_free(call);
1011
            goto restart;
4153 mejdrech 1012
        } else {
1013
            /*
1014
             * Decrement the counter of active calls only if the
1015
             * call is not an answer to IPC_M_PHONE_HUNGUP,
1016
             * which doesn't contribute to the counter.
1017
             */
1018
            atomic_dec(&TASK->active_calls);
1086 palkovsky 1019
        }
1020
 
1021
        STRUCT_TO_USPACE(&calldata->args, &call->data.args);
1027 palkovsky 1022
        ipc_call_free(call);
1023
 
2471 jermar 1024
        return ((unative_t) call) | IPC_CALLID_ANSWERED;
1027 palkovsky 1025
    }
1086 palkovsky 1026
 
1027 palkovsky 1027
    if (process_request(&TASK->answerbox, call))
1028
        goto restart;
1086 palkovsky 1029
 
1090 palkovsky 1030
    /* Include phone address('id') of the caller in the request,
1031
     * copy whole call->data, not only call->data.args */
1396 palkovsky 1032
    if (STRUCT_TO_USPACE(calldata, &call->data)) {
4153 mejdrech 1033
        /*
1034
         * The callee will not receive this call and no one else has
1035
         * a chance to answer it. Reply with the EPARTY error code.
1036
         */
1037
        ipc_data_t saved_data;
1038
        int saveddata = 0;
1039
 
1040
        if (answer_need_old(call)) {
1041
            memcpy(&saved_data, &call->data, sizeof(call->data));
1042
            saveddata = 1;
1043
        }
1044
 
1045
        IPC_SET_RETVAL(call->data, EPARTY);
1046
        (void) answer_preprocess(call, saveddata ? &saved_data : NULL);
1047
        ipc_answer(&TASK->answerbox, call);
1396 palkovsky 1048
        return 0;
1049
    }
1780 jermar 1050
    return (unative_t)call;
1027 palkovsky 1051
}
1258 palkovsky 1052
 
2471 jermar 1053
/** Connect an IRQ handler to a task.
1923 jermar 1054
 *
2471 jermar 1055
 * @param inr       IRQ number.
1056
 * @param devno     Device number.
1057
 * @param method    Method to be associated with the notification.
1058
 * @param ucode     Uspace pointer to the top-half pseudocode.
1923 jermar 1059
 *
2471 jermar 1060
 * @return      EPERM or a return code returned by ipc_irq_register().
1923 jermar 1061
 */
2359 jermar 1062
unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method,
1063
    irq_code_t *ucode)
1258 palkovsky 1064
{
1297 jermar 1065
    if (!(cap_get(TASK) & CAP_IRQ_REG))
1066
        return EPERM;
1067
 
1923 jermar 1068
    return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode);
1258 palkovsky 1069
}
1070
 
2471 jermar 1071
/** Disconnect an IRQ handler from a task.
1923 jermar 1072
 *
2471 jermar 1073
 * @param inr       IRQ number.
1074
 * @param devno     Device number.
1075
 *
1076
 * @return      Zero on success or EPERM on error..
1923 jermar 1077
 */
1078
unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno)
1258 palkovsky 1079
{
1297 jermar 1080
    if (!(cap_get(TASK) & CAP_IRQ_REG))
1081
        return EPERM;
1082
 
1923 jermar 1083
    ipc_irq_unregister(&TASK->answerbox, inr, devno);
1258 palkovsky 1084
 
1085
    return 0;
1086
}
1702 cejka 1087
 
4153 mejdrech 1088
#include <console/console.h>
1089
 
1090
/**
1091
 * Syscall connect to a task by id.
1092
 *
1093
 * @return      Phone id on success, or negative error code.
1094
 */
1095
unative_t sys_ipc_connect_kbox(sysarg64_t *uspace_taskid_arg)
1096
{
1097
#ifdef CONFIG_UDEBUG
1098
    sysarg64_t taskid_arg;
1099
    int rc;
1100
 
1101
    rc = copy_from_uspace(&taskid_arg, uspace_taskid_arg, sizeof(sysarg64_t));
1102
    if (rc != 0)
1103
        return (unative_t) rc;
1104
 
1105
    LOG("sys_ipc_connect_kbox(%" PRIu64 ")\n", taskid_arg.value);
1106
 
1107
    return ipc_connect_kbox(taskid_arg.value);
1108
#else
1109
    return (unative_t) ENOTSUP;
1110
#endif
1111
}
1112
 
1757 jermar 1113
/** @}
1702 cejka 1114
 */