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955 palkovsky 1
/*
2071 jermar 2
 * Copyright (c) 2006 Ondrej Palkovsky
955 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
 
955 palkovsky 35
/* Lock ordering
36
 *
2471 jermar 37
 * First the answerbox, then the phone.
955 palkovsky 38
 */
39
 
3020 jermar 40
#include <synch/synch.h>
1040 palkovsky 41
#include <synch/spinlock.h>
3020 jermar 42
#include <synch/mutex.h>
1040 palkovsky 43
#include <synch/waitq.h>
1364 jermar 44
#include <synch/synch.h>
955 palkovsky 45
#include <ipc/ipc.h>
46
#include <errno.h>
47
#include <mm/slab.h>
48
#include <arch.h>
49
#include <proc/task.h>
50
#include <memstr.h>
51
#include <debug.h>
52
 
53
#include <print.h>
54
#include <proc/thread.h>
1258 palkovsky 55
#include <arch/interrupt.h>
1281 palkovsky 56
#include <ipc/irq.h>
955 palkovsky 57
 
2471 jermar 58
/** Open channel that is assigned automatically to new tasks */
965 palkovsky 59
answerbox_t *ipc_phone_0 = NULL;
955 palkovsky 60
 
61
static slab_cache_t *ipc_call_slab;
62
 
2471 jermar 63
/** Initialize a call structure.
64
 *
65
 * @param call      Call structure to be initialized.
66
 */
1084 palkovsky 67
static void _ipc_call_init(call_t *call)
68
{
3104 svoboda 69
    memsetb(call, sizeof(*call), 0);
1084 palkovsky 70
    call->callerbox = &TASK->answerbox;
71
    call->sender = TASK;
2494 jermar 72
    call->buffer = NULL;
1084 palkovsky 73
}
74
 
2471 jermar 75
/** Allocate and initialize a call structure.
955 palkovsky 76
 *
2471 jermar 77
 * The call is initialized, so that the reply will be directed to
78
 * TASK->answerbox.
1258 palkovsky 79
 *
2471 jermar 80
 * @param flags     Parameters for slab_alloc (e.g FRAME_ATOMIC).
81
 *
82
 * @return      If flags permit it, return NULL, or initialized kernel
83
 *          call structure.
955 palkovsky 84
 */
2471 jermar 85
call_t *ipc_call_alloc(int flags)
955 palkovsky 86
{
87
    call_t *call;
88
 
1258 palkovsky 89
    call = slab_alloc(ipc_call_slab, flags);
3184 jermar 90
    if (call)
91
        _ipc_call_init(call);
955 palkovsky 92
 
93
    return call;
94
}
95
 
2471 jermar 96
/** Initialize a statically allocated call structure.
97
 *
98
 * @param call      Statically allocated kernel call structure to be
99
 *          initialized.
100
 */
1084 palkovsky 101
void ipc_call_static_init(call_t *call)
965 palkovsky 102
{
1084 palkovsky 103
    _ipc_call_init(call);
104
    call->flags |= IPC_CALL_STATIC_ALLOC;
965 palkovsky 105
}
106
 
2472 jermar 107
/** Deallocate a call structure.
2471 jermar 108
 *
109
 * @param call      Call structure to be freed.
110
 */
955 palkovsky 111
void ipc_call_free(call_t *call)
112
{
2471 jermar 113
    ASSERT(!(call->flags & IPC_CALL_STATIC_ALLOC));
2494 jermar 114
    /* Check to see if we have data in the IPC_M_DATA_SEND buffer. */
115
    if (call->buffer)
116
        free(call->buffer);
955 palkovsky 117
    slab_free(ipc_call_slab, call);
118
}
119
 
2471 jermar 120
/** Initialize an answerbox structure.
121
 *
122
 * @param box       Answerbox structure to be initialized.
2802 jermar 123
 * @param task      Task to which the answerbox belongs.
955 palkovsky 124
 */
2802 jermar 125
void ipc_answerbox_init(answerbox_t *box, task_t *task)
955 palkovsky 126
{
1040 palkovsky 127
    spinlock_initialize(&box->lock, "ipc_box_lock");
1258 palkovsky 128
    spinlock_initialize(&box->irq_lock, "ipc_box_irqlock");
1040 palkovsky 129
    waitq_initialize(&box->wq);
955 palkovsky 130
    list_initialize(&box->connected_phones);
131
    list_initialize(&box->calls);
132
    list_initialize(&box->dispatched_calls);
133
    list_initialize(&box->answers);
1258 palkovsky 134
    list_initialize(&box->irq_notifs);
1933 jermar 135
    list_initialize(&box->irq_head);
2802 jermar 136
    box->task = task;
955 palkovsky 137
}
138
 
2471 jermar 139
/** Connect a phone to an answerbox.
140
 *
141
 * @param phone     Initialized phone structure.
142
 * @param box       Initialized answerbox structure.
143
 */
1040 palkovsky 144
void ipc_phone_connect(phone_t *phone, answerbox_t *box)
955 palkovsky 145
{
3020 jermar 146
    mutex_lock(&phone->lock);
1084 palkovsky 147
 
1568 palkovsky 148
    phone->state = IPC_PHONE_CONNECTED;
955 palkovsky 149
    phone->callee = box;
965 palkovsky 150
 
1040 palkovsky 151
    spinlock_lock(&box->lock);
1573 palkovsky 152
    list_append(&phone->link, &box->connected_phones);
1040 palkovsky 153
    spinlock_unlock(&box->lock);
1084 palkovsky 154
 
3020 jermar 155
    mutex_unlock(&phone->lock);
955 palkovsky 156
}
157
 
2471 jermar 158
/** Initialize a phone structure.
159
 *
160
 * @param phone     Phone structure to be initialized.
1040 palkovsky 161
 */
162
void ipc_phone_init(phone_t *phone)
163
{
3186 jermar 164
    mutex_initialize(&phone->lock, MUTEX_PASSIVE);
1040 palkovsky 165
    phone->callee = NULL;
1568 palkovsky 166
    phone->state = IPC_PHONE_FREE;
1088 palkovsky 167
    atomic_set(&phone->active_calls, 0);
1040 palkovsky 168
}
169
 
2471 jermar 170
/** Helper function to facilitate synchronous calls.
171
 *
172
 * @param phone     Destination kernel phone structure.
173
 * @param request   Call structure with request.
3370 jermar 174
 *
175
 * @return      EOK on success or EINTR if the sleep was interrupted.
2471 jermar 176
 */
3370 jermar 177
int ipc_call_sync(phone_t *phone, call_t *request)
959 palkovsky 178
{
179
    answerbox_t sync_box;
955 palkovsky 180
 
2802 jermar 181
    ipc_answerbox_init(&sync_box, TASK);
959 palkovsky 182
 
2471 jermar 183
    /* We will receive data in a special box. */
959 palkovsky 184
    request->callerbox = &sync_box;
185
 
186
    ipc_call(phone, request);
3370 jermar 187
    if (!ipc_wait_for_call(&sync_box, SYNCH_NO_TIMEOUT,
188
        SYNCH_FLAGS_INTERRUPTIBLE))
189
        return EINTR;
190
    return EOK;
959 palkovsky 191
}
192
 
2471 jermar 193
/** Answer a message which was not dispatched and is not listed in any queue.
194
 *
195
 * @param call      Call structure to be answered.
1084 palkovsky 196
 */
197
static void _ipc_answer_free_call(call_t *call)
198
{
199
    answerbox_t *callerbox = call->callerbox;
200
 
201
    call->flags |= IPC_CALL_ANSWERED;
202
 
3363 jermar 203
    if (call->flags & IPC_CALL_FORWARDED) {
204
        if (call->data.caller_phone) {
205
            /* Demasquerade the caller phone. */
206
            call->data.phone = call->data.caller_phone;
207
        }
208
    }
209
 
1084 palkovsky 210
    spinlock_lock(&callerbox->lock);
1573 palkovsky 211
    list_append(&call->link, &callerbox->answers);
1084 palkovsky 212
    spinlock_unlock(&callerbox->lock);
2310 jermar 213
    waitq_wakeup(&callerbox->wq, WAKEUP_FIRST);
1084 palkovsky 214
}
215
 
2471 jermar 216
/** Answer a message which is in a callee queue.
1084 palkovsky 217
 *
2471 jermar 218
 * @param box       Answerbox that is answering the message.
219
 * @param call      Modified request that is being sent back.
1084 palkovsky 220
 */
221
void ipc_answer(answerbox_t *box, call_t *call)
222
{
223
    /* Remove from active box */
224
    spinlock_lock(&box->lock);
1573 palkovsky 225
    list_remove(&call->link);
1084 palkovsky 226
    spinlock_unlock(&box->lock);
227
    /* Send back answer */
228
    _ipc_answer_free_call(call);
229
}
230
 
2471 jermar 231
/** Simulate sending back a message.
1090 palkovsky 232
 *
233
 * Most errors are better handled by forming a normal backward
234
 * message and sending it as a normal answer.
2471 jermar 235
 *
236
 * @param phone     Phone structure the call should appear to come from.
237
 * @param call      Call structure to be answered.
238
 * @param err       Return value to be used for the answer.
1090 palkovsky 239
 */
1780 jermar 240
void ipc_backsend_err(phone_t *phone, call_t *call, unative_t err)
1090 palkovsky 241
{
242
    call->data.phone = phone;
243
    atomic_inc(&phone->active_calls);
1568 palkovsky 244
    IPC_SET_RETVAL(call->data, err);
1090 palkovsky 245
    _ipc_answer_free_call(call);
246
}
247
 
2471 jermar 248
/** Unsafe unchecking version of ipc_call.
249
 *
250
 * @param phone     Phone structure the call comes from.
251
 * @param box       Destination answerbox structure.
2601 jermar 252
 * @param call      Call structure with request.
2471 jermar 253
 */
1086 palkovsky 254
static void _ipc_call(phone_t *phone, answerbox_t *box, call_t *call)
255
{
2471 jermar 256
    if (!(call->flags & IPC_CALL_FORWARDED)) {
1088 palkovsky 257
        atomic_inc(&phone->active_calls);
258
        call->data.phone = phone;
259
    }
1086 palkovsky 260
 
261
    spinlock_lock(&box->lock);
1573 palkovsky 262
    list_append(&call->link, &box->calls);
1086 palkovsky 263
    spinlock_unlock(&box->lock);
2310 jermar 264
    waitq_wakeup(&box->wq, WAKEUP_FIRST);
1086 palkovsky 265
}
266
 
2471 jermar 267
/** Send an asynchronous request using a phone to an answerbox.
955 palkovsky 268
 *
2471 jermar 269
 * @param phone     Phone structure the call comes from and which is
270
 *          connected to the destination answerbox.
271
 * @param call      Call structure with request.
272
 *
273
 * @return      Return 0 on success, ENOENT on error.
955 palkovsky 274
 */
1088 palkovsky 275
int ipc_call(phone_t *phone, call_t *call)
955 palkovsky 276
{
1084 palkovsky 277
    answerbox_t *box;
955 palkovsky 278
 
3020 jermar 279
    mutex_lock(&phone->lock);
1568 palkovsky 280
    if (phone->state != IPC_PHONE_CONNECTED) {
3020 jermar 281
        mutex_unlock(&phone->lock);
1088 palkovsky 282
        if (call->flags & IPC_CALL_FORWARDED) {
283
            IPC_SET_RETVAL(call->data, EFORWARD);
1090 palkovsky 284
            _ipc_answer_free_call(call);
1568 palkovsky 285
        } else {
286
            if (phone->state == IPC_PHONE_HUNGUP)
1090 palkovsky 287
                ipc_backsend_err(phone, call, EHANGUP);
1088 palkovsky 288
            else
1090 palkovsky 289
                ipc_backsend_err(phone, call, ENOENT);
1088 palkovsky 290
        }
291
        return ENOENT;
1084 palkovsky 292
    }
1568 palkovsky 293
    box = phone->callee;
1086 palkovsky 294
    _ipc_call(phone, box, call);
295
 
3020 jermar 296
    mutex_unlock(&phone->lock);
1088 palkovsky 297
    return 0;
1086 palkovsky 298
}
955 palkovsky 299
 
2471 jermar 300
/** Disconnect phone from answerbox.
1086 palkovsky 301
 *
2471 jermar 302
 * This call leaves the phone in the HUNGUP state. The change to 'free' is done
1568 palkovsky 303
 * lazily later.
1086 palkovsky 304
 *
2471 jermar 305
 * @param phone     Phone structure to be hung up.
1568 palkovsky 306
 *              
2471 jermar 307
 * @return      Return 0 if the phone is disconnected.
308
 *          Return -1 if the phone was already disconnected.
1086 palkovsky 309
 */
1591 palkovsky 310
int ipc_phone_hangup(phone_t *phone)
1086 palkovsky 311
{
312
    answerbox_t *box;
313
    call_t *call;
314
 
3020 jermar 315
    mutex_lock(&phone->lock);
2494 jermar 316
    if (phone->state == IPC_PHONE_FREE ||
317
        phone->state == IPC_PHONE_HUNGUP ||
2471 jermar 318
        phone->state == IPC_PHONE_CONNECTING) {
3020 jermar 319
        mutex_unlock(&phone->lock);
1568 palkovsky 320
        return -1;
321
    }
1086 palkovsky 322
    box = phone->callee;
1568 palkovsky 323
    if (phone->state != IPC_PHONE_SLAMMED) {
324
        /* Remove myself from answerbox */
325
        spinlock_lock(&box->lock);
1573 palkovsky 326
        list_remove(&phone->link);
1568 palkovsky 327
        spinlock_unlock(&box->lock);
328
 
329
        if (phone->state != IPC_PHONE_SLAMMED) {
330
            call = ipc_call_alloc(0);
331
            IPC_SET_METHOD(call->data, IPC_M_PHONE_HUNGUP);
332
            call->flags |= IPC_CALL_DISCARD_ANSWER;
333
            _ipc_call(phone, box, call);
1088 palkovsky 334
        }
1086 palkovsky 335
    }
336
 
1568 palkovsky 337
    phone->state = IPC_PHONE_HUNGUP;
3020 jermar 338
    mutex_unlock(&phone->lock);
1086 palkovsky 339
 
340
    return 0;
955 palkovsky 341
}
342
 
2471 jermar 343
/** Forwards call from one answerbox to another one.
1040 palkovsky 344
 *
2471 jermar 345
 * @param call      Call structure to be redirected.
346
 * @param newphone  Phone structure to target answerbox.
347
 * @param oldbox    Old answerbox structure.
2622 jermar 348
 * @param mode      Flags that specify mode of the forward operation.
2471 jermar 349
 *
350
 * @return      Return 0 if forwarding succeeded or an error code if
351
 *          there was error.
1088 palkovsky 352
 *
2471 jermar 353
 * The return value serves only as an information for the forwarder,
354
 * the original caller is notified automatically with EFORWARD.
1040 palkovsky 355
 */
2622 jermar 356
int ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox, int mode)
1040 palkovsky 357
{
358
    spinlock_lock(&oldbox->lock);
1573 palkovsky 359
    list_remove(&call->link);
1040 palkovsky 360
    spinlock_unlock(&oldbox->lock);
361
 
3362 jermar 362
    if (mode & IPC_FF_ROUTE_FROM_ME) {
363
        if (!call->data.caller_phone)
364
            call->data.caller_phone = call->data.phone;
2623 jermar 365
        call->data.phone = newphone;
3362 jermar 366
    }
2623 jermar 367
 
1088 palkovsky 368
    return ipc_call(newphone, call);
1040 palkovsky 369
}
370
 
955 palkovsky 371
 
2471 jermar 372
/** Wait for a phone call.
955 palkovsky 373
 *
2471 jermar 374
 * @param box       Answerbox expecting the call.
375
 * @param usec      Timeout in microseconds. See documentation for
376
 *          waitq_sleep_timeout() for decription of its special
377
 *          meaning.
378
 * @param flags     Select mode of sleep operation. See documentation for
379
 *          waitq_sleep_timeout() for description of its special
380
 *          meaning.
381
 * @return      Recived call structure or NULL.
382
 *
383
 * To distinguish between a call and an answer, have a look at call->flags.
955 palkovsky 384
 */
2471 jermar 385
call_t *ipc_wait_for_call(answerbox_t *box, uint32_t usec, int flags)
955 palkovsky 386
{
387
    call_t *request;
1258 palkovsky 388
    ipl_t ipl;
1364 jermar 389
    int rc;
955 palkovsky 390
 
1364 jermar 391
restart:
1502 jermar 392
    rc = waitq_sleep_timeout(&box->wq, usec, flags);
1364 jermar 393
    if (SYNCH_FAILED(rc))
394
        return NULL;
1086 palkovsky 395
 
1040 palkovsky 396
    spinlock_lock(&box->lock);
1258 palkovsky 397
    if (!list_empty(&box->irq_notifs)) {
398
        ipl = interrupts_disable();
399
        spinlock_lock(&box->irq_lock);
400
 
1573 palkovsky 401
        request = list_get_instance(box->irq_notifs.next, call_t, link);
402
        list_remove(&request->link);
1258 palkovsky 403
 
404
        spinlock_unlock(&box->irq_lock);
405
        interrupts_restore(ipl);
406
    } else if (!list_empty(&box->answers)) {
1086 palkovsky 407
        /* Handle asynchronous answers */
1573 palkovsky 408
        request = list_get_instance(box->answers.next, call_t, link);
409
        list_remove(&request->link);
3363 jermar 410
        atomic_dec(&request->data.phone->active_calls);
1086 palkovsky 411
    } else if (!list_empty(&box->calls)) {
412
        /* Handle requests */
1573 palkovsky 413
        request = list_get_instance(box->calls.next, call_t, link);
414
        list_remove(&request->link);
1086 palkovsky 415
        /* Append request to dispatch queue */
1573 palkovsky 416
        list_append(&request->link, &box->dispatched_calls);
1086 palkovsky 417
    } else {
1595 palkovsky 418
        /* This can happen regularly after ipc_cleanup */
1086 palkovsky 419
        spinlock_unlock(&box->lock);
420
        goto restart;
955 palkovsky 421
    }
1040 palkovsky 422
    spinlock_unlock(&box->lock);
955 palkovsky 423
    return request;
424
}
425
 
2471 jermar 426
/** Answer all calls from list with EHANGUP answer.
427
 *
428
 * @param lst       Head of the list to be cleaned up.
429
 */
1141 palkovsky 430
static void ipc_cleanup_call_list(link_t *lst)
431
{
432
    call_t *call;
433
 
434
    while (!list_empty(lst)) {
1573 palkovsky 435
        call = list_get_instance(lst->next, call_t, link);
2662 jermar 436
        if (call->buffer)
437
            free(call->buffer);
1573 palkovsky 438
        list_remove(&call->link);
1141 palkovsky 439
 
440
        IPC_SET_RETVAL(call->data, EHANGUP);
441
        _ipc_answer_free_call(call);
442
    }
443
}
444
 
2471 jermar 445
/** Cleans up all IPC communication of the current task.
1072 palkovsky 446
 *
1582 palkovsky 447
 * Note: ipc_hangup sets returning answerbox to TASK->answerbox, you
2471 jermar 448
 * have to change it as well if you want to cleanup other tasks than TASK.
1072 palkovsky 449
 */
1582 palkovsky 450
void ipc_cleanup(void)
1072 palkovsky 451
{
1088 palkovsky 452
    int i;
1141 palkovsky 453
    call_t *call;
454
    phone_t *phone;
2183 jermar 455
    DEADLOCK_PROBE_INIT(p_phonelck);
1582 palkovsky 456
 
1088 palkovsky 457
    /* Disconnect all our phones ('ipc_phone_hangup') */
2471 jermar 458
    for (i = 0; i < IPC_MAX_PHONES; i++)
1591 palkovsky 459
        ipc_phone_hangup(&TASK->phones[i]);
1088 palkovsky 460
 
1258 palkovsky 461
    /* Disconnect all connected irqs */
1582 palkovsky 462
    ipc_irq_cleanup(&TASK->answerbox);
1258 palkovsky 463
 
1141 palkovsky 464
    /* Disconnect all phones connected to our answerbox */
465
restart_phones:
1582 palkovsky 466
    spinlock_lock(&TASK->answerbox.lock);
467
    while (!list_empty(&TASK->answerbox.connected_phones)) {
468
        phone = list_get_instance(TASK->answerbox.connected_phones.next,
2183 jermar 469
            phone_t, link);
3020 jermar 470
        if (SYNCH_FAILED(mutex_trylock(&phone->lock))) {
1582 palkovsky 471
            spinlock_unlock(&TASK->answerbox.lock);
2183 jermar 472
            DEADLOCK_PROBE(p_phonelck, DEADLOCK_THRESHOLD);
1141 palkovsky 473
            goto restart_phones;
474
        }
475
 
476
        /* Disconnect phone */
1568 palkovsky 477
        ASSERT(phone->state == IPC_PHONE_CONNECTED);
478
        phone->state = IPC_PHONE_SLAMMED;
1573 palkovsky 479
        list_remove(&phone->link);
1088 palkovsky 480
 
3020 jermar 481
        mutex_unlock(&phone->lock);
1141 palkovsky 482
    }
483
 
1088 palkovsky 484
    /* Answer all messages in 'calls' and 'dispatched_calls' queues */
1582 palkovsky 485
    ipc_cleanup_call_list(&TASK->answerbox.dispatched_calls);
486
    ipc_cleanup_call_list(&TASK->answerbox.calls);
487
    spinlock_unlock(&TASK->answerbox.lock);
1072 palkovsky 488
 
1088 palkovsky 489
    /* Wait for all async answers to arrive */
1568 palkovsky 490
    while (1) {
491
        /* Go through all phones, until all are FREE... */
492
        /* Locking not needed, no one else should modify
493
         * it, when we are in cleanup */
2471 jermar 494
        for (i = 0; i < IPC_MAX_PHONES; i++) {
495
            if (TASK->phones[i].state == IPC_PHONE_HUNGUP &&
1582 palkovsky 496
                atomic_get(&TASK->phones[i].active_calls) == 0)
497
                TASK->phones[i].state = IPC_PHONE_FREE;
498
 
1591 palkovsky 499
            /* Just for sure, we might have had some
500
             * IPC_PHONE_CONNECTING phones */
1582 palkovsky 501
            if (TASK->phones[i].state == IPC_PHONE_CONNECTED)
1591 palkovsky 502
                ipc_phone_hangup(&TASK->phones[i]);
503
            /* If the hangup succeeded, it has sent a HANGUP
504
             * message, the IPC is now in HUNGUP state, we
505
             * wait for the reply to come */
1582 palkovsky 506
 
507
            if (TASK->phones[i].state != IPC_PHONE_FREE)
1568 palkovsky 508
                break;
509
        }
510
        /* Voila, got into cleanup */
511
        if (i == IPC_MAX_PHONES)
512
            break;
513
 
2471 jermar 514
        call = ipc_wait_for_call(&TASK->answerbox, SYNCH_NO_TIMEOUT,
515
            SYNCH_FLAGS_NONE);
516
        ASSERT((call->flags & IPC_CALL_ANSWERED) ||
517
            (call->flags & IPC_CALL_NOTIF));
518
        ASSERT(!(call->flags & IPC_CALL_STATIC_ALLOC));
1141 palkovsky 519
 
1582 palkovsky 520
        atomic_dec(&TASK->active_calls);
1141 palkovsky 521
        ipc_call_free(call);
522
    }
1072 palkovsky 523
}
1258 palkovsky 524
 
525
 
1923 jermar 526
/** Initilize IPC subsystem */
1258 palkovsky 527
void ipc_init(void)
528
{
2471 jermar 529
    ipc_call_slab = slab_cache_create("ipc_call", sizeof(call_t), 0, NULL,
530
        NULL, 0);
1258 palkovsky 531
}
532
 
1573 palkovsky 533
 
2471 jermar 534
/** List answerbox contents.
535
 *
536
 * @param taskid    Task ID.
537
 */
1573 palkovsky 538
void ipc_print_task(task_id_t taskid)
539
{
540
    task_t *task;
541
    int i;
542
    call_t *call;
543
    link_t *tmp;
544
 
545
    spinlock_lock(&tasks_lock);
546
    task = task_find_by_id(taskid);
547
    if (task)
548
        spinlock_lock(&task->lock);
549
    spinlock_unlock(&tasks_lock);
550
    if (!task)
551
        return;
552
 
553
    /* Print opened phones & details */
554
    printf("PHONE:\n");
2471 jermar 555
    for (i = 0; i < IPC_MAX_PHONES; i++) {
3020 jermar 556
        if (SYNCH_FAILED(mutex_trylock(&task->phones[i].lock))) {
557
            printf("%d: mutex busy\n", i);
558
            continue;
559
        }
1573 palkovsky 560
        if (task->phones[i].state != IPC_PHONE_FREE) {
2471 jermar 561
            printf("%d: ", i);
1573 palkovsky 562
            switch (task->phones[i].state) {
563
            case IPC_PHONE_CONNECTING:
564
                printf("connecting ");
565
                break;
566
            case IPC_PHONE_CONNECTED:
1735 decky 567
                printf("connected to: %p ",
1573 palkovsky 568
                       task->phones[i].callee);
569
                break;
570
            case IPC_PHONE_SLAMMED:
1735 decky 571
                printf("slammed by: %p ",
1573 palkovsky 572
                       task->phones[i].callee);
573
                break;
574
            case IPC_PHONE_HUNGUP:
1735 decky 575
                printf("hung up - was: %p ",
1573 palkovsky 576
                       task->phones[i].callee);
577
                break;
578
            default:
579
                break;
580
            }
3054 decky 581
            printf("active: %ld\n",
2472 jermar 582
                atomic_get(&task->phones[i].active_calls));
1573 palkovsky 583
        }
3020 jermar 584
        mutex_unlock(&task->phones[i].lock);
1573 palkovsky 585
    }
586
 
587
 
588
    /* Print answerbox - calls */
589
    spinlock_lock(&task->answerbox.lock);
590
    printf("ABOX - CALLS:\n");
2472 jermar 591
    for (tmp = task->answerbox.calls.next; tmp != &task->answerbox.calls;
3090 decky 592
        tmp = tmp->next) {
1573 palkovsky 593
        call = list_get_instance(tmp, call_t, link);
3054 decky 594
        printf("Callid: %p Srctask:%" PRIu64 " M:%" PRIun
595
            " A1:%" PRIun " A2:%" PRIun " A3:%" PRIun
596
            " A4:%" PRIun " A5:%" PRIun " Flags:%x\n", call, call->sender->taskid,
2472 jermar 597
            IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
598
            IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
2637 cejka 599
            IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
2472 jermar 600
            call->flags);
1573 palkovsky 601
    }
602
    /* Print answerbox - calls */
603
    printf("ABOX - DISPATCHED CALLS:\n");
3054 decky 604
    for (tmp = task->answerbox.dispatched_calls.next;
3090 decky 605
        tmp != &task->answerbox.dispatched_calls;
606
        tmp = tmp->next) {
1573 palkovsky 607
        call = list_get_instance(tmp, call_t, link);
3054 decky 608
        printf("Callid: %p Srctask:%" PRIu64 " M:%" PRIun
609
            " A1:%" PRIun " A2:%" PRIun " A3:%" PRIun
610
            " A4:%" PRIun " A5:%" PRIun " Flags:%x\n", call, call->sender->taskid,
2472 jermar 611
            IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
612
            IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
2637 cejka 613
            IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
2472 jermar 614
            call->flags);
1573 palkovsky 615
    }
616
    /* Print answerbox - calls */
617
    printf("ABOX - ANSWERS:\n");
2472 jermar 618
    for (tmp = task->answerbox.answers.next; tmp != &task->answerbox.answers;
3090 decky 619
        tmp = tmp->next) {
1573 palkovsky 620
        call = list_get_instance(tmp, call_t, link);
3054 decky 621
        printf("Callid:%p M:%" PRIun " A1:%" PRIun " A2:%" PRIun
622
            " A3:%" PRIun " A4:%" PRIun " A5:%" PRIun " Flags:%x\n",
2637 cejka 623
            call, IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
2472 jermar 624
            IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
2637 cejka 625
            IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
2472 jermar 626
            call->flags);
1573 palkovsky 627
    }
628
 
629
    spinlock_unlock(&task->answerbox.lock);
630
    spinlock_unlock(&task->lock);
631
}
1702 cejka 632
 
1757 jermar 633
/** @}
1702 cejka 634
 */