| 1 | /*
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| 2 | * Copyright (c) 2006 Ondrej Palkovsky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup kernel_generic_ipc
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #include <synch/spinlock.h>
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| 36 | #include <ipc/ipc.h>
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| 37 | #include <arch.h>
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| 38 | #include <proc/task.h>
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| 39 | #include <ipc/ipcrsc.h>
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| 40 | #include <assert.h>
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| 41 | #include <abi/errno.h>
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| 42 | #include <cap/cap.h>
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| 43 | #include <mm/slab.h>
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| 44 |
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| 45 | static void phone_destroy(void *arg)
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| 46 | {
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| 47 | phone_t *phone = (phone_t *) arg;
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| 48 | if (phone->hangup_call)
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| 49 | kobject_put(phone->hangup_call->kobject);
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| 50 | slab_free(phone_cache, phone);
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| 51 | }
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| 52 |
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| 53 | static kobject_ops_t phone_kobject_ops = {
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| 54 | .destroy = phone_destroy
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| 55 | };
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| 56 |
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| 57 | /** Allocate new phone in the specified task.
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| 58 | *
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| 59 | * @param[in] task Task for which to allocate a new phone.
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| 60 | * @param[in] publish If true, the new capability will be published.
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| 61 | * @param[out] phandle New phone capability handle.
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| 62 | * @param[out] kobject New phone kobject.
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| 63 | *
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| 64 | * @return An error code if a new capability cannot be allocated.
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| 65 | */
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| 66 | errno_t phone_alloc(task_t *task, bool publish, cap_phone_handle_t *phandle,
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| 67 | kobject_t **kobject)
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| 68 | {
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| 69 | cap_handle_t handle;
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| 70 | errno_t rc = cap_alloc(task, &handle);
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| 71 | if (rc == EOK) {
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| 72 | phone_t *phone = slab_alloc(phone_cache, FRAME_ATOMIC);
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| 73 | if (!phone) {
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| 74 | cap_free(TASK, handle);
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| 75 | return ENOMEM;
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| 76 | }
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| 77 | kobject_t *kobj = malloc(sizeof(kobject_t));
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| 78 | if (!kobj) {
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| 79 | cap_free(TASK, handle);
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| 80 | slab_free(phone_cache, phone);
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| 81 | return ENOMEM;
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| 82 | }
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| 83 | call_t *hcall = ipc_call_alloc(FRAME_ATOMIC);
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| 84 | if (!hcall) {
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| 85 | cap_free(TASK, handle);
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| 86 | slab_free(phone_cache, phone);
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| 87 | free(kobj);
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| 88 | return ENOMEM;
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| 89 | }
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| 90 |
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| 91 | ipc_phone_init(phone, task);
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| 92 | phone->state = IPC_PHONE_CONNECTING;
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| 93 | phone->hangup_call = hcall;
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| 94 |
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| 95 | kobject_initialize(kobj, KOBJECT_TYPE_PHONE, phone,
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| 96 | &phone_kobject_ops);
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| 97 | phone->kobject = kobj;
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| 98 |
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| 99 | if (publish)
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| 100 | cap_publish(task, handle, kobj);
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| 101 |
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| 102 | *phandle = handle;
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| 103 | if (kobject)
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| 104 | *kobject = kobj;
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| 105 | }
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| 106 | return rc;
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| 107 | }
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| 108 |
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| 109 | /** Free slot from a disconnected phone.
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| 110 | *
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| 111 | * All already sent messages will be correctly processed.
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| 112 | *
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| 113 | * @param handle Phone capability handle of the phone to be freed.
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| 114 | *
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| 115 | */
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| 116 | void phone_dealloc(cap_phone_handle_t handle)
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| 117 | {
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| 118 | kobject_t *kobj = cap_unpublish(TASK, handle, KOBJECT_TYPE_PHONE);
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| 119 | if (!kobj)
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| 120 | return;
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| 121 |
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| 122 | kobject_put(kobj);
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| 123 | cap_free(TASK, handle);
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| 124 | }
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| 125 |
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| 126 | /** @}
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| 127 | */
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