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  1. /*
  2.  * Copyright (c) 2006 Ondrej 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.  
  29. /** @addtogroup genericipc
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. /* Lock ordering
  36.  *
  37.  * First the answerbox, then the phone.
  38.  */
  39.  
  40. #include <synch/synch.h>
  41. #include <synch/spinlock.h>
  42. #include <synch/mutex.h>
  43. #include <synch/waitq.h>
  44. #include <synch/synch.h>
  45. #include <ipc/ipc.h>
  46. #include <ipc/ipc_kbox.h>
  47. #include <errno.h>
  48. #include <mm/slab.h>
  49. #include <arch.h>
  50. #include <proc/task.h>
  51. #include <memstr.h>
  52. #include <debug.h>
  53.  
  54. #include <print.h>
  55. #include <console/console.h>
  56. #include <proc/thread.h>
  57. #include <arch/interrupt.h>
  58. #include <ipc/irq.h>
  59.  
  60. /** Open channel that is assigned automatically to new tasks */
  61. answerbox_t *ipc_phone_0 = NULL;
  62.  
  63. static slab_cache_t *ipc_call_slab;
  64.  
  65. /** Initialize a call structure.
  66.  *
  67.  * @param call      Call structure to be initialized.
  68.  */
  69. static void _ipc_call_init(call_t *call)
  70. {
  71.     memsetb(call, sizeof(*call), 0);
  72.     call->callerbox = &TASK->answerbox;
  73.     call->sender = TASK;
  74.     call->buffer = NULL;
  75. }
  76.  
  77. /** Allocate and initialize a call structure.
  78.  *
  79.  * The call is initialized, so that the reply will be directed to
  80.  * TASK->answerbox.
  81.  *
  82.  * @param flags     Parameters for slab_alloc (e.g FRAME_ATOMIC).
  83.  *
  84.  * @return      If flags permit it, return NULL, or initialized kernel
  85.  *          call structure.
  86.  */
  87. call_t *ipc_call_alloc(int flags)
  88. {
  89.     call_t *call;
  90.  
  91.     call = slab_alloc(ipc_call_slab, flags);
  92.     if (call)
  93.         _ipc_call_init(call);
  94.  
  95.     return call;
  96. }
  97.  
  98. /** Initialize a statically allocated call structure.
  99.  *
  100.  * @param call      Statically allocated kernel call structure to be
  101.  *          initialized.
  102.  */
  103. void ipc_call_static_init(call_t *call)
  104. {
  105.     _ipc_call_init(call);
  106.     call->flags |= IPC_CALL_STATIC_ALLOC;
  107. }
  108.  
  109. /** Deallocate a call structure.
  110.  *
  111.  * @param call      Call structure to be freed.
  112.  */
  113. void ipc_call_free(call_t *call)
  114. {
  115.     ASSERT(!(call->flags & IPC_CALL_STATIC_ALLOC));
  116.     /* Check to see if we have data in the IPC_M_DATA_SEND buffer. */
  117.     if (call->buffer)
  118.         free(call->buffer);
  119.     slab_free(ipc_call_slab, call);
  120. }
  121.  
  122. /** Initialize an answerbox structure.
  123.  *
  124.  * @param box       Answerbox structure to be initialized.
  125.  * @param task      Task to which the answerbox belongs.
  126.  */
  127. void ipc_answerbox_init(answerbox_t *box, task_t *task)
  128. {
  129.     spinlock_initialize(&box->lock, "ipc_box_lock");
  130.     spinlock_initialize(&box->irq_lock, "ipc_box_irqlock");
  131.     waitq_initialize(&box->wq);
  132.     list_initialize(&box->connected_phones);
  133.     list_initialize(&box->calls);
  134.     list_initialize(&box->dispatched_calls);
  135.     list_initialize(&box->answers);
  136.     list_initialize(&box->irq_notifs);
  137.     list_initialize(&box->irq_head);
  138.     box->task = task;
  139. }
  140.  
  141. /** Connect a phone to an answerbox.
  142.  *
  143.  * @param phone     Initialized phone structure.
  144.  * @param box       Initialized answerbox structure.
  145.  */
  146. void ipc_phone_connect(phone_t *phone, answerbox_t *box)
  147. {
  148.     mutex_lock(&phone->lock);
  149.  
  150.     phone->state = IPC_PHONE_CONNECTED;
  151.     phone->callee = box;
  152.  
  153.     spinlock_lock(&box->lock);
  154.     list_append(&phone->link, &box->connected_phones);
  155.     spinlock_unlock(&box->lock);
  156.  
  157.     mutex_unlock(&phone->lock);
  158. }
  159.  
  160. /** Initialize a phone structure.
  161.  *
  162.  * @param phone     Phone structure to be initialized.
  163.  */
  164. void ipc_phone_init(phone_t *phone)
  165. {
  166.     mutex_initialize(&phone->lock, MUTEX_PASSIVE);
  167.     phone->callee = NULL;
  168.     phone->state = IPC_PHONE_FREE;
  169.     atomic_set(&phone->active_calls, 0);
  170. }
  171.  
  172. /** Helper function to facilitate synchronous calls.
  173.  *
  174.  * @param phone     Destination kernel phone structure.
  175.  * @param request   Call structure with request.
  176.  *
  177.  * @return      EOK on success or EINTR if the sleep was interrupted.
  178.  */
  179. int ipc_call_sync(phone_t *phone, call_t *request)
  180. {
  181.     answerbox_t sync_box;
  182.  
  183.     ipc_answerbox_init(&sync_box, TASK);
  184.  
  185.     /* We will receive data in a special box. */
  186.     request->callerbox = &sync_box;
  187.  
  188.     ipc_call(phone, request);
  189.     if (!ipc_wait_for_call(&sync_box, SYNCH_NO_TIMEOUT,
  190.         SYNCH_FLAGS_INTERRUPTIBLE))
  191.         return EINTR;
  192.     return EOK;
  193. }
  194.  
  195. /** Answer a message which was not dispatched and is not listed in any queue.
  196.  *
  197.  * @param call      Call structure to be answered.
  198.  */
  199. static void _ipc_answer_free_call(call_t *call)
  200. {
  201.     answerbox_t *callerbox = call->callerbox;
  202.  
  203.     call->flags |= IPC_CALL_ANSWERED;
  204.  
  205.     if (call->flags & IPC_CALL_FORWARDED) {
  206.         if (call->caller_phone) {
  207.             /* Demasquerade the caller phone. */
  208.             call->data.phone = call->caller_phone;
  209.         }
  210.     }
  211.  
  212.     spinlock_lock(&callerbox->lock);
  213.     list_append(&call->link, &callerbox->answers);
  214.     spinlock_unlock(&callerbox->lock);
  215.     waitq_wakeup(&callerbox->wq, WAKEUP_FIRST);
  216. }
  217.  
  218. /** Answer a message which is in a callee queue.
  219.  *
  220.  * @param box       Answerbox that is answering the message.
  221.  * @param call      Modified request that is being sent back.
  222.  */
  223. void ipc_answer(answerbox_t *box, call_t *call)
  224. {
  225.     /* Remove from active box */
  226.     spinlock_lock(&box->lock);
  227.     list_remove(&call->link);
  228.     spinlock_unlock(&box->lock);
  229.     /* Send back answer */
  230.     _ipc_answer_free_call(call);
  231. }
  232.  
  233. /** Simulate sending back a message.
  234.  *
  235.  * Most errors are better handled by forming a normal backward
  236.  * message and sending it as a normal answer.
  237.  *
  238.  * @param phone     Phone structure the call should appear to come from.
  239.  * @param call      Call structure to be answered.
  240.  * @param err       Return value to be used for the answer.
  241.  */
  242. void ipc_backsend_err(phone_t *phone, call_t *call, unative_t err)
  243. {
  244.     call->data.phone = phone;
  245.     atomic_inc(&phone->active_calls);
  246.     IPC_SET_RETVAL(call->data, err);
  247.     _ipc_answer_free_call(call);
  248. }
  249.  
  250. /** Unsafe unchecking version of ipc_call.
  251.  *
  252.  * @param phone     Phone structure the call comes from.
  253.  * @param box       Destination answerbox structure.
  254.  * @param call      Call structure with request.
  255.  */
  256. static void _ipc_call(phone_t *phone, answerbox_t *box, call_t *call)
  257. {
  258.     if (!(call->flags & IPC_CALL_FORWARDED)) {
  259.         atomic_inc(&phone->active_calls);
  260.         call->data.phone = phone;
  261.     }
  262.  
  263.     spinlock_lock(&box->lock);
  264.     list_append(&call->link, &box->calls);
  265.     spinlock_unlock(&box->lock);
  266.     waitq_wakeup(&box->wq, WAKEUP_FIRST);
  267. }
  268.  
  269. /** Send an asynchronous request using a phone to an answerbox.
  270.  *
  271.  * @param phone     Phone structure the call comes from and which is
  272.  *          connected to the destination answerbox.
  273.  * @param call      Call structure with request.
  274.  *
  275.  * @return      Return 0 on success, ENOENT on error.
  276.  */
  277. int ipc_call(phone_t *phone, call_t *call)
  278. {
  279.     answerbox_t *box;
  280.  
  281.     mutex_lock(&phone->lock);
  282.     if (phone->state != IPC_PHONE_CONNECTED) {
  283.         mutex_unlock(&phone->lock);
  284.         if (call->flags & IPC_CALL_FORWARDED) {
  285.             IPC_SET_RETVAL(call->data, EFORWARD);
  286.             _ipc_answer_free_call(call);
  287.         } else {
  288.             if (phone->state == IPC_PHONE_HUNGUP)
  289.                 ipc_backsend_err(phone, call, EHANGUP);
  290.             else
  291.                 ipc_backsend_err(phone, call, ENOENT);
  292.         }
  293.         return ENOENT;
  294.     }
  295.     box = phone->callee;
  296.     _ipc_call(phone, box, call);
  297.    
  298.     mutex_unlock(&phone->lock);
  299.     return 0;
  300. }
  301.  
  302. /** Disconnect phone from answerbox.
  303.  *
  304.  * This call leaves the phone in the HUNGUP state. The change to 'free' is done
  305.  * lazily later.
  306.  *
  307.  * @param phone     Phone structure to be hung up.
  308.  *              
  309.  * @return      Return 0 if the phone is disconnected.
  310.  *          Return -1 if the phone was already disconnected.
  311.  */
  312. int ipc_phone_hangup(phone_t *phone)
  313. {
  314.     answerbox_t *box;
  315.     call_t *call;
  316.    
  317.     mutex_lock(&phone->lock);
  318.     if (phone->state == IPC_PHONE_FREE ||
  319.         phone->state == IPC_PHONE_HUNGUP ||
  320.         phone->state == IPC_PHONE_CONNECTING) {
  321.         mutex_unlock(&phone->lock);
  322.         return -1;
  323.     }
  324.     box = phone->callee;
  325.     if (phone->state != IPC_PHONE_SLAMMED) {
  326.         /* Remove myself from answerbox */
  327.         spinlock_lock(&box->lock);
  328.         list_remove(&phone->link);
  329.         spinlock_unlock(&box->lock);
  330.  
  331.         if (phone->state != IPC_PHONE_SLAMMED) {
  332.             call = ipc_call_alloc(0);
  333.             IPC_SET_METHOD(call->data, IPC_M_PHONE_HUNGUP);
  334.             call->flags |= IPC_CALL_DISCARD_ANSWER;
  335.             _ipc_call(phone, box, call);
  336.         }
  337.     }
  338.  
  339.     phone->state = IPC_PHONE_HUNGUP;
  340.     mutex_unlock(&phone->lock);
  341.  
  342.     return 0;
  343. }
  344.  
  345. /** Forwards call from one answerbox to another one.
  346.  *
  347.  * @param call      Call structure to be redirected.
  348.  * @param newphone  Phone structure to target answerbox.
  349.  * @param oldbox    Old answerbox structure.
  350.  * @param mode      Flags that specify mode of the forward operation.
  351.  *
  352.  * @return      Return 0 if forwarding succeeded or an error code if
  353.  *          there was error.
  354.  *
  355.  * The return value serves only as an information for the forwarder,
  356.  * the original caller is notified automatically with EFORWARD.
  357.  */
  358. int ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox, int mode)
  359. {
  360.     spinlock_lock(&oldbox->lock);
  361.     list_remove(&call->link);
  362.     spinlock_unlock(&oldbox->lock);
  363.  
  364.     if (mode & IPC_FF_ROUTE_FROM_ME) {
  365.         if (!call->caller_phone)
  366.             call->caller_phone = call->data.phone;
  367.         call->data.phone = newphone;
  368.     }
  369.  
  370.     return ipc_call(newphone, call);
  371. }
  372.  
  373.  
  374. /** Wait for a phone call.
  375.  *
  376.  * @param box       Answerbox expecting the call.
  377.  * @param usec      Timeout in microseconds. See documentation for
  378.  *          waitq_sleep_timeout() for decription of its special
  379.  *          meaning.
  380.  * @param flags     Select mode of sleep operation. See documentation for
  381.  *          waitq_sleep_timeout() for description of its special
  382.  *          meaning.
  383.  * @return      Recived call structure or NULL.
  384.  *
  385.  * To distinguish between a call and an answer, have a look at call->flags.
  386.  */
  387. call_t *ipc_wait_for_call(answerbox_t *box, uint32_t usec, int flags)
  388. {
  389.     call_t *request;
  390.     ipl_t ipl;
  391.     int rc;
  392.  
  393. restart:
  394.     rc = waitq_sleep_timeout(&box->wq, usec, flags);
  395.     if (SYNCH_FAILED(rc))
  396.         return NULL;
  397.    
  398.     spinlock_lock(&box->lock);
  399.     if (!list_empty(&box->irq_notifs)) {
  400.         ipl = interrupts_disable();
  401.         spinlock_lock(&box->irq_lock);
  402.  
  403.         request = list_get_instance(box->irq_notifs.next, call_t, link);
  404.         list_remove(&request->link);
  405.  
  406.         spinlock_unlock(&box->irq_lock);
  407.         interrupts_restore(ipl);
  408.     } else if (!list_empty(&box->answers)) {
  409.         /* Handle asynchronous answers */
  410.         request = list_get_instance(box->answers.next, call_t, link);
  411.         list_remove(&request->link);
  412.         atomic_dec(&request->data.phone->active_calls);
  413.     } else if (!list_empty(&box->calls)) {
  414.         /* Handle requests */
  415.         request = list_get_instance(box->calls.next, call_t, link);
  416.         list_remove(&request->link);
  417.         /* Append request to dispatch queue */
  418.         list_append(&request->link, &box->dispatched_calls);
  419.     } else {
  420.         /* This can happen regularly after ipc_cleanup */
  421.         spinlock_unlock(&box->lock);
  422.         goto restart;
  423.     }
  424.     spinlock_unlock(&box->lock);
  425.     return request;
  426. }
  427.  
  428. /** Answer all calls from list with EHANGUP answer.
  429.  *
  430.  * @param lst       Head of the list to be cleaned up.
  431.  */
  432. void ipc_cleanup_call_list(link_t *lst)
  433. {
  434.     call_t *call;
  435.  
  436.     while (!list_empty(lst)) {
  437.         call = list_get_instance(lst->next, call_t, link);
  438.         if (call->buffer)
  439.             free(call->buffer);
  440.         list_remove(&call->link);
  441.  
  442.         IPC_SET_RETVAL(call->data, EHANGUP);
  443.         _ipc_answer_free_call(call);
  444.     }
  445. }
  446.  
  447. /** Disconnects all phones connected to an answerbox.
  448.  *
  449.  * @param box       Answerbox to disconnect phones from.
  450.  * @param notify_box    If true, the answerbox will get a hangup message for
  451.  *          each disconnected phone.
  452.  */
  453. void ipc_answerbox_slam_phones(answerbox_t *box, bool notify_box)
  454. {
  455.     phone_t *phone;
  456.     DEADLOCK_PROBE_INIT(p_phonelck);
  457.     ipl_t ipl;
  458.     call_t *call;
  459.  
  460.     call = notify_box ? ipc_call_alloc(0) : NULL;
  461.  
  462.     /* Disconnect all phones connected to our answerbox */
  463. restart_phones:
  464.     ipl = interrupts_disable();
  465.     spinlock_lock(&box->lock);
  466.     while (!list_empty(&box->connected_phones)) {
  467.         phone = list_get_instance(box->connected_phones.next,
  468.             phone_t, link);
  469.         if (SYNCH_FAILED(mutex_trylock(&phone->lock))) {
  470.             spinlock_unlock(&box->lock);
  471.             interrupts_restore(ipl);
  472.             DEADLOCK_PROBE(p_phonelck, DEADLOCK_THRESHOLD);
  473.             goto restart_phones;
  474.         }
  475.        
  476.         /* Disconnect phone */
  477.         ASSERT(phone->state == IPC_PHONE_CONNECTED);
  478.  
  479.         list_remove(&phone->link);
  480.         phone->state = IPC_PHONE_SLAMMED;
  481.  
  482.         if (notify_box) {
  483.             mutex_unlock(&phone->lock);
  484.             spinlock_unlock(&box->lock);
  485.             interrupts_restore(ipl);
  486.  
  487.             /*
  488.              * Send one message to the answerbox for each
  489.              * phone. Used to make sure the kbox thread
  490.              * wakes up after the last phone has been
  491.              * disconnected.
  492.              */
  493.             IPC_SET_METHOD(call->data, IPC_M_PHONE_HUNGUP);
  494.             call->flags |= IPC_CALL_DISCARD_ANSWER;
  495.             _ipc_call(phone, box, call);
  496.  
  497.             /* Allocate another call in advance */
  498.             call = ipc_call_alloc(0);
  499.  
  500.             /* Must start again */
  501.             goto restart_phones;
  502.         }
  503.  
  504.         mutex_unlock(&phone->lock);
  505.     }
  506.  
  507.     spinlock_unlock(&box->lock);
  508.     interrupts_restore(ipl);
  509.  
  510.     /* Free unused call */
  511.     if (call) ipc_call_free(call);
  512. }
  513.  
  514. /** Cleans up all IPC communication of the current task.
  515.  *
  516.  * Note: ipc_hangup sets returning answerbox to TASK->answerbox, you
  517.  * have to change it as well if you want to cleanup other tasks than TASK.
  518.  */
  519. void ipc_cleanup(void)
  520. {
  521.     int i;
  522.     call_t *call;
  523.  
  524.     /* Disconnect all our phones ('ipc_phone_hangup') */
  525.     for (i = 0; i < IPC_MAX_PHONES; i++)
  526.         ipc_phone_hangup(&TASK->phones[i]);
  527.  
  528.     /* Disconnect all connected irqs */
  529.     ipc_irq_cleanup(&TASK->answerbox);
  530.  
  531.     /* Disconnect all phones connected to our regular answerbox */
  532.     ipc_answerbox_slam_phones(&TASK->answerbox, false);
  533.  
  534. #ifdef CONFIG_UDEBUG
  535.     /* Clean up kbox thread and communications */
  536.     ipc_kbox_cleanup();
  537. #endif
  538.  
  539.     /* Answer all messages in 'calls' and 'dispatched_calls' queues */
  540.     spinlock_lock(&TASK->answerbox.lock);
  541.     ipc_cleanup_call_list(&TASK->answerbox.dispatched_calls);
  542.     ipc_cleanup_call_list(&TASK->answerbox.calls);
  543.     spinlock_unlock(&TASK->answerbox.lock);
  544.    
  545.     /* Wait for all async answers to arrive */
  546.     while (1) {
  547.         /* Go through all phones, until all are FREE... */
  548.         /* Locking not needed, no one else should modify
  549.          * it, when we are in cleanup */
  550.         for (i = 0; i < IPC_MAX_PHONES; i++) {
  551.             if (TASK->phones[i].state == IPC_PHONE_HUNGUP &&
  552.                 atomic_get(&TASK->phones[i].active_calls) == 0)
  553.                 TASK->phones[i].state = IPC_PHONE_FREE;
  554.            
  555.             /* Just for sure, we might have had some
  556.              * IPC_PHONE_CONNECTING phones */
  557.             if (TASK->phones[i].state == IPC_PHONE_CONNECTED)
  558.                 ipc_phone_hangup(&TASK->phones[i]);
  559.             /* If the hangup succeeded, it has sent a HANGUP
  560.              * message, the IPC is now in HUNGUP state, we
  561.              * wait for the reply to come */
  562.            
  563.             if (TASK->phones[i].state != IPC_PHONE_FREE)
  564.                 break;
  565.         }
  566.         /* Voila, got into cleanup */
  567.         if (i == IPC_MAX_PHONES)
  568.             break;
  569.        
  570.         call = ipc_wait_for_call(&TASK->answerbox, SYNCH_NO_TIMEOUT,
  571.             SYNCH_FLAGS_NONE);
  572.         ASSERT((call->flags & IPC_CALL_ANSWERED) ||
  573.             (call->flags & IPC_CALL_NOTIF));
  574.         ASSERT(!(call->flags & IPC_CALL_STATIC_ALLOC));
  575.        
  576.         atomic_dec(&TASK->active_calls);
  577.         ipc_call_free(call);
  578.     }
  579. }
  580.  
  581.  
  582. /** Initilize IPC subsystem */
  583. void ipc_init(void)
  584. {
  585.     ipc_call_slab = slab_cache_create("ipc_call", sizeof(call_t), 0, NULL,
  586.         NULL, 0);
  587. }
  588.  
  589.  
  590. /** List answerbox contents.
  591.  *
  592.  * @param taskid    Task ID.
  593.  */
  594. void ipc_print_task(task_id_t taskid)
  595. {
  596.     task_t *task;
  597.     int i;
  598.     call_t *call;
  599.     link_t *tmp;
  600.    
  601.     spinlock_lock(&tasks_lock);
  602.     task = task_find_by_id(taskid);
  603.     if (task)
  604.         spinlock_lock(&task->lock);
  605.     spinlock_unlock(&tasks_lock);
  606.     if (!task)
  607.         return;
  608.  
  609.     /* Print opened phones & details */
  610.     printf("PHONE:\n");
  611.     for (i = 0; i < IPC_MAX_PHONES; i++) {
  612.         if (SYNCH_FAILED(mutex_trylock(&task->phones[i].lock))) {
  613.             printf("%d: mutex busy\n", i);
  614.             continue;
  615.         }
  616.         if (task->phones[i].state != IPC_PHONE_FREE) {
  617.             printf("%d: ", i);
  618.             switch (task->phones[i].state) {
  619.             case IPC_PHONE_CONNECTING:
  620.                 printf("connecting ");
  621.                 break;
  622.             case IPC_PHONE_CONNECTED:
  623.                 printf("connected to: %p ",
  624.                        task->phones[i].callee);
  625.                 break;
  626.             case IPC_PHONE_SLAMMED:
  627.                 printf("slammed by: %p ",
  628.                        task->phones[i].callee);
  629.                 break;
  630.             case IPC_PHONE_HUNGUP:
  631.                 printf("hung up - was: %p ",
  632.                        task->phones[i].callee);
  633.                 break;
  634.             default:
  635.                 break;
  636.             }
  637.             printf("active: %ld\n",
  638.                 atomic_get(&task->phones[i].active_calls));
  639.         }
  640.         mutex_unlock(&task->phones[i].lock);
  641.     }
  642.  
  643.  
  644.     /* Print answerbox - calls */
  645.     spinlock_lock(&task->answerbox.lock);
  646.     printf("ABOX - CALLS:\n");
  647.     for (tmp = task->answerbox.calls.next; tmp != &task->answerbox.calls;
  648.         tmp = tmp->next) {
  649.         call = list_get_instance(tmp, call_t, link);
  650.         printf("Callid: %p Srctask:%" PRIu64 " M:%" PRIun
  651.             " A1:%" PRIun " A2:%" PRIun " A3:%" PRIun
  652.             " A4:%" PRIun " A5:%" PRIun " Flags:%x\n", call,
  653.             call->sender->taskid,
  654.             IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
  655.             IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
  656.             IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
  657.             call->flags);
  658.     }
  659.     /* Print answerbox - calls */
  660.     printf("ABOX - DISPATCHED CALLS:\n");
  661.     for (tmp = task->answerbox.dispatched_calls.next;
  662.         tmp != &task->answerbox.dispatched_calls;
  663.         tmp = tmp->next) {
  664.         call = list_get_instance(tmp, call_t, link);
  665.         printf("Callid: %p Srctask:%" PRIu64 " M:%" PRIun
  666.             " A1:%" PRIun " A2:%" PRIun " A3:%" PRIun
  667.             " A4:%" PRIun " A5:%" PRIun " Flags:%x\n", call,
  668.             call->sender->taskid,
  669.             IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
  670.             IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
  671.             IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
  672.             call->flags);
  673.     }
  674.     /* Print answerbox - calls */
  675.     printf("ABOX - ANSWERS:\n");
  676.     for (tmp = task->answerbox.answers.next;
  677.         tmp != &task->answerbox.answers;
  678.         tmp = tmp->next) {
  679.         call = list_get_instance(tmp, call_t, link);
  680.         printf("Callid:%p M:%" PRIun " A1:%" PRIun " A2:%" PRIun
  681.             " A3:%" PRIun " A4:%" PRIun " A5:%" PRIun " Flags:%x\n",
  682.             call, IPC_GET_METHOD(call->data), IPC_GET_ARG1(call->data),
  683.             IPC_GET_ARG2(call->data), IPC_GET_ARG3(call->data),
  684.             IPC_GET_ARG4(call->data), IPC_GET_ARG5(call->data),
  685.             call->flags);
  686.     }
  687.  
  688.     spinlock_unlock(&task->answerbox.lock);
  689.     spinlock_unlock(&task->lock);
  690. }
  691.  
  692. /** @}
  693.  */
  694.