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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.
174
 */
959 palkovsky 175
void ipc_call_sync(phone_t *phone, call_t *request)
176
{
177
    answerbox_t sync_box;
955 palkovsky 178
 
2802 jermar 179
    ipc_answerbox_init(&sync_box, TASK);
959 palkovsky 180
 
2471 jermar 181
    /* We will receive data in a special box. */
959 palkovsky 182
    request->callerbox = &sync_box;
183
 
184
    ipc_call(phone, request);
1502 jermar 185
    ipc_wait_for_call(&sync_box, SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE);
959 palkovsky 186
}
187
 
2471 jermar 188
/** Answer a message which was not dispatched and is not listed in any queue.
189
 *
190
 * @param call      Call structure to be answered.
1084 palkovsky 191
 */
192
static void _ipc_answer_free_call(call_t *call)
193
{
194
    answerbox_t *callerbox = call->callerbox;
195
 
196
    call->flags |= IPC_CALL_ANSWERED;
197
 
198
    spinlock_lock(&callerbox->lock);
1573 palkovsky 199
    list_append(&call->link, &callerbox->answers);
1084 palkovsky 200
    spinlock_unlock(&callerbox->lock);
2310 jermar 201
    waitq_wakeup(&callerbox->wq, WAKEUP_FIRST);
1084 palkovsky 202
}
203
 
2471 jermar 204
/** Answer a message which is in a callee queue.
1084 palkovsky 205
 *
2471 jermar 206
 * @param box       Answerbox that is answering the message.
207
 * @param call      Modified request that is being sent back.
1084 palkovsky 208
 */
209
void ipc_answer(answerbox_t *box, call_t *call)
210
{
211
    /* Remove from active box */
212
    spinlock_lock(&box->lock);
1573 palkovsky 213
    list_remove(&call->link);
1084 palkovsky 214
    spinlock_unlock(&box->lock);
215
    /* Send back answer */
216
    _ipc_answer_free_call(call);
217
}
218
 
2471 jermar 219
/** Simulate sending back a message.
1090 palkovsky 220
 *
221
 * Most errors are better handled by forming a normal backward
222
 * message and sending it as a normal answer.
2471 jermar 223
 *
224
 * @param phone     Phone structure the call should appear to come from.
225
 * @param call      Call structure to be answered.
226
 * @param err       Return value to be used for the answer.
1090 palkovsky 227
 */
1780 jermar 228
void ipc_backsend_err(phone_t *phone, call_t *call, unative_t err)
1090 palkovsky 229
{
230
    call->data.phone = phone;
231
    atomic_inc(&phone->active_calls);
1568 palkovsky 232
    IPC_SET_RETVAL(call->data, err);
1090 palkovsky 233
    _ipc_answer_free_call(call);
234
}
235
 
2471 jermar 236
/** Unsafe unchecking version of ipc_call.
237
 *
238
 * @param phone     Phone structure the call comes from.
239
 * @param box       Destination answerbox structure.
2601 jermar 240
 * @param call      Call structure with request.
2471 jermar 241
 */
1086 palkovsky 242
static void _ipc_call(phone_t *phone, answerbox_t *box, call_t *call)
243
{
2471 jermar 244
    if (!(call->flags & IPC_CALL_FORWARDED)) {
1088 palkovsky 245
        atomic_inc(&phone->active_calls);
246
        call->data.phone = phone;
247
    }
1086 palkovsky 248
 
249
    spinlock_lock(&box->lock);
1573 palkovsky 250
    list_append(&call->link, &box->calls);
1086 palkovsky 251
    spinlock_unlock(&box->lock);
2310 jermar 252
    waitq_wakeup(&box->wq, WAKEUP_FIRST);
1086 palkovsky 253
}
254
 
2471 jermar 255
/** Send an asynchronous request using a phone to an answerbox.
955 palkovsky 256
 *
2471 jermar 257
 * @param phone     Phone structure the call comes from and which is
258
 *          connected to the destination answerbox.
259
 * @param call      Call structure with request.
260
 *
261
 * @return      Return 0 on success, ENOENT on error.
955 palkovsky 262
 */
1088 palkovsky 263
int ipc_call(phone_t *phone, call_t *call)
955 palkovsky 264
{
1084 palkovsky 265
    answerbox_t *box;
955 palkovsky 266
 
3020 jermar 267
    mutex_lock(&phone->lock);
1568 palkovsky 268
    if (phone->state != IPC_PHONE_CONNECTED) {
3020 jermar 269
        mutex_unlock(&phone->lock);
1088 palkovsky 270
        if (call->flags & IPC_CALL_FORWARDED) {
271
            IPC_SET_RETVAL(call->data, EFORWARD);
1090 palkovsky 272
            _ipc_answer_free_call(call);
1568 palkovsky 273
        } else {
274
            if (phone->state == IPC_PHONE_HUNGUP)
1090 palkovsky 275
                ipc_backsend_err(phone, call, EHANGUP);
1088 palkovsky 276
            else
1090 palkovsky 277
                ipc_backsend_err(phone, call, ENOENT);
1088 palkovsky 278
        }
279
        return ENOENT;
1084 palkovsky 280
    }
1568 palkovsky 281
    box = phone->callee;
1086 palkovsky 282
    _ipc_call(phone, box, call);
283
 
3020 jermar 284
    mutex_unlock(&phone->lock);
1088 palkovsky 285
    return 0;
1086 palkovsky 286
}
955 palkovsky 287
 
2471 jermar 288
/** Disconnect phone from answerbox.
1086 palkovsky 289
 *
2471 jermar 290
 * This call leaves the phone in the HUNGUP state. The change to 'free' is done
1568 palkovsky 291
 * lazily later.
1086 palkovsky 292
 *
2471 jermar 293
 * @param phone     Phone structure to be hung up.
1568 palkovsky 294
 *              
2471 jermar 295
 * @return      Return 0 if the phone is disconnected.
296
 *          Return -1 if the phone was already disconnected.
1086 palkovsky 297
 */
1591 palkovsky 298
int ipc_phone_hangup(phone_t *phone)
1086 palkovsky 299
{
300
    answerbox_t *box;
301
    call_t *call;
302
 
3020 jermar 303
    mutex_lock(&phone->lock);
2494 jermar 304
    if (phone->state == IPC_PHONE_FREE ||
305
        phone->state == IPC_PHONE_HUNGUP ||
2471 jermar 306
        phone->state == IPC_PHONE_CONNECTING) {
3020 jermar 307
        mutex_unlock(&phone->lock);
1568 palkovsky 308
        return -1;
309
    }
1086 palkovsky 310
    box = phone->callee;
1568 palkovsky 311
    if (phone->state != IPC_PHONE_SLAMMED) {
312
        /* Remove myself from answerbox */
313
        spinlock_lock(&box->lock);
1573 palkovsky 314
        list_remove(&phone->link);
1568 palkovsky 315
        spinlock_unlock(&box->lock);
316
 
317
        if (phone->state != IPC_PHONE_SLAMMED) {
318
            call = ipc_call_alloc(0);
319
            IPC_SET_METHOD(call->data, IPC_M_PHONE_HUNGUP);
320
            call->flags |= IPC_CALL_DISCARD_ANSWER;
321
            _ipc_call(phone, box, call);
1088 palkovsky 322
        }
1086 palkovsky 323
    }
324
 
1568 palkovsky 325
    phone->state = IPC_PHONE_HUNGUP;
3020 jermar 326
    mutex_unlock(&phone->lock);
1086 palkovsky 327
 
328
    return 0;
955 palkovsky 329
}
330
 
2471 jermar 331
/** Forwards call from one answerbox to another one.
1040 palkovsky 332
 *
2471 jermar 333
 * @param call      Call structure to be redirected.
334
 * @param newphone  Phone structure to target answerbox.
335
 * @param oldbox    Old answerbox structure.
2622 jermar 336
 * @param mode      Flags that specify mode of the forward operation.
2471 jermar 337
 *
338
 * @return      Return 0 if forwarding succeeded or an error code if
339
 *          there was error.
1088 palkovsky 340
 *
2471 jermar 341
 * The return value serves only as an information for the forwarder,
342
 * the original caller is notified automatically with EFORWARD.
1040 palkovsky 343
 */
2622 jermar 344
int ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox, int mode)
1040 palkovsky 345
{
346
    spinlock_lock(&oldbox->lock);
1573 palkovsky 347
    list_remove(&call->link);
1040 palkovsky 348
    spinlock_unlock(&oldbox->lock);
349
 
2623 jermar 350
    if (mode & IPC_FF_ROUTE_FROM_ME)
351
        call->data.phone = newphone;
352
 
1088 palkovsky 353
    return ipc_call(newphone, call);
1040 palkovsky 354
}
355
 
955 palkovsky 356
 
2471 jermar 357
/** Wait for a phone call.
955 palkovsky 358
 *
2471 jermar 359
 * @param box       Answerbox expecting the call.
360
 * @param usec      Timeout in microseconds. See documentation for
361
 *          waitq_sleep_timeout() for decription of its special
362
 *          meaning.
363
 * @param flags     Select mode of sleep operation. See documentation for
364
 *          waitq_sleep_timeout() for description of its special
365
 *          meaning.
366
 * @return      Recived call structure or NULL.
367
 *
368
 * To distinguish between a call and an answer, have a look at call->flags.
955 palkovsky 369
 */
2471 jermar 370
call_t *ipc_wait_for_call(answerbox_t *box, uint32_t usec, int flags)
955 palkovsky 371
{
372
    call_t *request;
1258 palkovsky 373
    ipl_t ipl;
1364 jermar 374
    int rc;
955 palkovsky 375
 
1364 jermar 376
restart:
1502 jermar 377
    rc = waitq_sleep_timeout(&box->wq, usec, flags);
1364 jermar 378
    if (SYNCH_FAILED(rc))
379
        return NULL;
1086 palkovsky 380
 
1040 palkovsky 381
    spinlock_lock(&box->lock);
1258 palkovsky 382
    if (!list_empty(&box->irq_notifs)) {
383
        ipl = interrupts_disable();
384
        spinlock_lock(&box->irq_lock);
385
 
1573 palkovsky 386
        request = list_get_instance(box->irq_notifs.next, call_t, link);
387
        list_remove(&request->link);
1258 palkovsky 388
 
389
        spinlock_unlock(&box->irq_lock);
390
        interrupts_restore(ipl);
391
    } else if (!list_empty(&box->answers)) {
1086 palkovsky 392
        /* Handle asynchronous answers */
1573 palkovsky 393
        request = list_get_instance(box->answers.next, call_t, link);
394
        list_remove(&request->link);
1086 palkovsky 395
        atomic_dec(&request->data.phone->active_calls);
396
    } else if (!list_empty(&box->calls)) {
397
        /* Handle requests */
1573 palkovsky 398
        request = list_get_instance(box->calls.next, call_t, link);
399
        list_remove(&request->link);
1086 palkovsky 400
        /* Append request to dispatch queue */
1573 palkovsky 401
        list_append(&request->link, &box->dispatched_calls);
1086 palkovsky 402
    } else {
1595 palkovsky 403
        /* This can happen regularly after ipc_cleanup */
1086 palkovsky 404
        spinlock_unlock(&box->lock);
405
        goto restart;
955 palkovsky 406
    }
1040 palkovsky 407
    spinlock_unlock(&box->lock);
955 palkovsky 408
    return request;
409
}
410
 
2471 jermar 411
/** Answer all calls from list with EHANGUP answer.
412
 *
413
 * @param lst       Head of the list to be cleaned up.
414
 */
1141 palkovsky 415
static void ipc_cleanup_call_list(link_t *lst)
416
{
417
    call_t *call;
418
 
419
    while (!list_empty(lst)) {
1573 palkovsky 420
        call = list_get_instance(lst->next, call_t, link);
2662 jermar 421
        if (call->buffer)
422
            free(call->buffer);
1573 palkovsky 423
        list_remove(&call->link);
1141 palkovsky 424
 
425
        IPC_SET_RETVAL(call->data, EHANGUP);
426
        _ipc_answer_free_call(call);
427
    }
428
}
429
 
2471 jermar 430
/** Cleans up all IPC communication of the current task.
1072 palkovsky 431
 *
1582 palkovsky 432
 * Note: ipc_hangup sets returning answerbox to TASK->answerbox, you
2471 jermar 433
 * have to change it as well if you want to cleanup other tasks than TASK.
1072 palkovsky 434
 */
1582 palkovsky 435
void ipc_cleanup(void)
1072 palkovsky 436
{
1088 palkovsky 437
    int i;
1141 palkovsky 438
    call_t *call;
439
    phone_t *phone;
2183 jermar 440
    DEADLOCK_PROBE_INIT(p_phonelck);
1582 palkovsky 441
 
1088 palkovsky 442
    /* Disconnect all our phones ('ipc_phone_hangup') */
2471 jermar 443
    for (i = 0; i < IPC_MAX_PHONES; i++)
1591 palkovsky 444
        ipc_phone_hangup(&TASK->phones[i]);
1088 palkovsky 445
 
1258 palkovsky 446
    /* Disconnect all connected irqs */
1582 palkovsky 447
    ipc_irq_cleanup(&TASK->answerbox);
1258 palkovsky 448
 
1141 palkovsky 449
    /* Disconnect all phones connected to our answerbox */
450
restart_phones:
1582 palkovsky 451
    spinlock_lock(&TASK->answerbox.lock);
452
    while (!list_empty(&TASK->answerbox.connected_phones)) {
453
        phone = list_get_instance(TASK->answerbox.connected_phones.next,
2183 jermar 454
            phone_t, link);
3020 jermar 455
        if (SYNCH_FAILED(mutex_trylock(&phone->lock))) {
1582 palkovsky 456
            spinlock_unlock(&TASK->answerbox.lock);
2183 jermar 457
            DEADLOCK_PROBE(p_phonelck, DEADLOCK_THRESHOLD);
1141 palkovsky 458
            goto restart_phones;
459
        }
460
 
461
        /* Disconnect phone */
1568 palkovsky 462
        ASSERT(phone->state == IPC_PHONE_CONNECTED);
463
        phone->state = IPC_PHONE_SLAMMED;
1573 palkovsky 464
        list_remove(&phone->link);
1088 palkovsky 465
 
3020 jermar 466
        mutex_unlock(&phone->lock);
1141 palkovsky 467
    }
468
 
1088 palkovsky 469
    /* Answer all messages in 'calls' and 'dispatched_calls' queues */
1582 palkovsky 470
    ipc_cleanup_call_list(&TASK->answerbox.dispatched_calls);
471
    ipc_cleanup_call_list(&TASK->answerbox.calls);
472
    spinlock_unlock(&TASK->answerbox.lock);
1072 palkovsky 473
 
1088 palkovsky 474
    /* Wait for all async answers to arrive */
1568 palkovsky 475
    while (1) {
476
        /* Go through all phones, until all are FREE... */
477
        /* Locking not needed, no one else should modify
478
         * it, when we are in cleanup */
2471 jermar 479
        for (i = 0; i < IPC_MAX_PHONES; i++) {
480
            if (TASK->phones[i].state == IPC_PHONE_HUNGUP &&
1582 palkovsky 481
                atomic_get(&TASK->phones[i].active_calls) == 0)
482
                TASK->phones[i].state = IPC_PHONE_FREE;
483
 
1591 palkovsky 484
            /* Just for sure, we might have had some
485
             * IPC_PHONE_CONNECTING phones */
1582 palkovsky 486
            if (TASK->phones[i].state == IPC_PHONE_CONNECTED)
1591 palkovsky 487
                ipc_phone_hangup(&TASK->phones[i]);
488
            /* If the hangup succeeded, it has sent a HANGUP
489
             * message, the IPC is now in HUNGUP state, we
490
             * wait for the reply to come */
1582 palkovsky 491
 
492
            if (TASK->phones[i].state != IPC_PHONE_FREE)
1568 palkovsky 493
                break;
494
        }
495
        /* Voila, got into cleanup */
496
        if (i == IPC_MAX_PHONES)
497
            break;
498
 
2471 jermar 499
        call = ipc_wait_for_call(&TASK->answerbox, SYNCH_NO_TIMEOUT,
500
            SYNCH_FLAGS_NONE);
501
        ASSERT((call->flags & IPC_CALL_ANSWERED) ||
502
            (call->flags & IPC_CALL_NOTIF));
503
        ASSERT(!(call->flags & IPC_CALL_STATIC_ALLOC));
1141 palkovsky 504
 
1582 palkovsky 505
        atomic_dec(&TASK->active_calls);
1141 palkovsky 506
        ipc_call_free(call);
507
    }
1072 palkovsky 508
}
1258 palkovsky 509
 
510
 
1923 jermar 511
/** Initilize IPC subsystem */
1258 palkovsky 512
void ipc_init(void)
513
{
2471 jermar 514
    ipc_call_slab = slab_cache_create("ipc_call", sizeof(call_t), 0, NULL,
515
        NULL, 0);
1258 palkovsky 516
}
517
 
1573 palkovsky 518
 
2471 jermar 519
/** List answerbox contents.
520
 *
521
 * @param taskid    Task ID.
522
 */
1573 palkovsky 523
void ipc_print_task(task_id_t taskid)
524
{
525
    task_t *task;
526
    int i;
527
    call_t *call;
528
    link_t *tmp;
529
 
530
    spinlock_lock(&tasks_lock);
531
    task = task_find_by_id(taskid);
532
    if (task)
533
        spinlock_lock(&task->lock);
534
    spinlock_unlock(&tasks_lock);
535
    if (!task)
536
        return;
537
 
538
    /* Print opened phones & details */
539
    printf("PHONE:\n");
2471 jermar 540
    for (i = 0; i < IPC_MAX_PHONES; i++) {
3020 jermar 541
        if (SYNCH_FAILED(mutex_trylock(&task->phones[i].lock))) {
542
            printf("%d: mutex busy\n", i);
543
            continue;
544
        }
1573 palkovsky 545
        if (task->phones[i].state != IPC_PHONE_FREE) {
2471 jermar 546
            printf("%d: ", i);
1573 palkovsky 547
            switch (task->phones[i].state) {
548
            case IPC_PHONE_CONNECTING:
549
                printf("connecting ");
550
                break;
551
            case IPC_PHONE_CONNECTED:
1735 decky 552
                printf("connected to: %p ",
1573 palkovsky 553
                       task->phones[i].callee);
554
                break;
555
            case IPC_PHONE_SLAMMED:
1735 decky 556
                printf("slammed by: %p ",
1573 palkovsky 557
                       task->phones[i].callee);
558
                break;
559
            case IPC_PHONE_HUNGUP:
1735 decky 560
                printf("hung up - was: %p ",
1573 palkovsky 561
                       task->phones[i].callee);
562
                break;
563
            default:
564
                break;
565
            }
3054 decky 566
            printf("active: %ld\n",
2472 jermar 567
                atomic_get(&task->phones[i].active_calls));
1573 palkovsky 568
        }
3020 jermar 569
        mutex_unlock(&task->phones[i].lock);
1573 palkovsky 570
    }
571
 
572
 
573
    /* Print answerbox - calls */
574
    spinlock_lock(&task->answerbox.lock);
575
    printf("ABOX - CALLS:\n");
2472 jermar 576
    for (tmp = task->answerbox.calls.next; tmp != &task->answerbox.calls;
3090 decky 577
        tmp = tmp->next) {
1573 palkovsky 578
        call = list_get_instance(tmp, call_t, link);
3054 decky 579
        printf("Callid: %p Srctask:%" PRIu64 " M:%" PRIun
580
            " A1:%" PRIun " A2:%" PRIun " A3:%" PRIun
581
            " A4:%" PRIun " A5:%" PRIun " Flags:%x\n", call, call->sender->taskid,
2472 jermar 582
            IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
583
            IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
2637 cejka 584
            IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
2472 jermar 585
            call->flags);
1573 palkovsky 586
    }
587
    /* Print answerbox - calls */
588
    printf("ABOX - DISPATCHED CALLS:\n");
3054 decky 589
    for (tmp = task->answerbox.dispatched_calls.next;
3090 decky 590
        tmp != &task->answerbox.dispatched_calls;
591
        tmp = tmp->next) {
1573 palkovsky 592
        call = list_get_instance(tmp, call_t, link);
3054 decky 593
        printf("Callid: %p Srctask:%" PRIu64 " M:%" PRIun
594
            " A1:%" PRIun " A2:%" PRIun " A3:%" PRIun
595
            " A4:%" PRIun " A5:%" PRIun " Flags:%x\n", call, call->sender->taskid,
2472 jermar 596
            IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
597
            IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
2637 cejka 598
            IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
2472 jermar 599
            call->flags);
1573 palkovsky 600
    }
601
    /* Print answerbox - calls */
602
    printf("ABOX - ANSWERS:\n");
2472 jermar 603
    for (tmp = task->answerbox.answers.next; tmp != &task->answerbox.answers;
3090 decky 604
        tmp = tmp->next) {
1573 palkovsky 605
        call = list_get_instance(tmp, call_t, link);
3054 decky 606
        printf("Callid:%p M:%" PRIun " A1:%" PRIun " A2:%" PRIun
607
            " A3:%" PRIun " A4:%" PRIun " A5:%" PRIun " Flags:%x\n",
2637 cejka 608
            call, IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
2472 jermar 609
            IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
2637 cejka 610
            IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
2472 jermar 611
            call->flags);
1573 palkovsky 612
    }
613
 
614
    spinlock_unlock(&task->answerbox.lock);
615
    spinlock_unlock(&task->lock);
616
}
1702 cejka 617
 
1757 jermar 618
/** @}
1702 cejka 619
 */