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