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| 1 | /* |
1 | /* |
| 2 | * Copyright (c) 2006 Ondrej Palkovsky |
2 | * Copyright (c) 2006 Ondrej Palkovsky |
| 3 | * All rights reserved. |
3 | * All rights reserved. |
| 4 | * |
4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
7 | * are met: |
| 8 | * |
8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
| 16 | * |
16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| 29 | /** @addtogroup genericipc |
29 | /** @addtogroup genericipc |
| 30 | * @{ |
30 | * @{ |
| 31 | */ |
31 | */ |
| 32 | /** @file |
32 | /** @file |
| 33 | */ |
33 | */ |
| 34 | 34 | ||
| 35 | #include <arch.h> |
35 | #include <arch.h> |
| 36 | #include <proc/task.h> |
36 | #include <proc/task.h> |
| 37 | #include <proc/thread.h> |
37 | #include <proc/thread.h> |
| 38 | #include <errno.h> |
38 | #include <errno.h> |
| 39 | #include <memstr.h> |
39 | #include <memstr.h> |
| 40 | #include <debug.h> |
40 | #include <debug.h> |
| 41 | #include <ipc/ipc.h> |
41 | #include <ipc/ipc.h> |
| 42 | #include <ipc/sysipc.h> |
42 | #include <ipc/sysipc.h> |
| 43 | #include <ipc/irq.h> |
43 | #include <ipc/irq.h> |
| 44 | #include <ipc/ipcrsc.h> |
44 | #include <ipc/ipcrsc.h> |
| 45 | #include <arch/interrupt.h> |
45 | #include <arch/interrupt.h> |
| 46 | #include <print.h> |
46 | #include <print.h> |
| 47 | #include <syscall/copy.h> |
47 | #include <syscall/copy.h> |
| 48 | #include <security/cap.h> |
48 | #include <security/cap.h> |
| 49 | #include <mm/as.h> |
49 | #include <mm/as.h> |
| 50 | #include <print.h> |
50 | #include <print.h> |
| 51 | 51 | ||
| - | 52 | /** Maximum buffer size allowed for IPC_M_DATA_SEND requests. */ |
|
| - | 53 | #define DATA_SEND_LIMIT (64 * 1024) |
|
| - | 54 | ||
| 52 | #define GET_CHECK_PHONE(phone, phoneid, err) \ |
55 | #define GET_CHECK_PHONE(phone, phoneid, err) \ |
| 53 | { \ |
56 | { \ |
| 54 | if (phoneid > IPC_MAX_PHONES) { \ |
57 | if (phoneid > IPC_MAX_PHONES) { \ |
| 55 | err; \ |
58 | err; \ |
| 56 | } \ |
59 | } \ |
| 57 | phone = &TASK->phones[phoneid]; \ |
60 | phone = &TASK->phones[phoneid]; \ |
| 58 | } |
61 | } |
| 59 | 62 | ||
| 60 | #define STRUCT_TO_USPACE(dst, src) copy_to_uspace(dst, src, sizeof(*(src))) |
63 | #define STRUCT_TO_USPACE(dst, src) copy_to_uspace(dst, src, sizeof(*(src))) |
| 61 | 64 | ||
| 62 | /** Decide if the method is a system method. |
65 | /** Decide if the method is a system method. |
| 63 | * |
66 | * |
| 64 | * @param method Method to be decided. |
67 | * @param method Method to be decided. |
| 65 | * |
68 | * |
| 66 | * @return Return 1 if the method is a system method. |
69 | * @return Return 1 if the method is a system method. |
| 67 | * Otherwise return 0. |
70 | * Otherwise return 0. |
| 68 | */ |
71 | */ |
| 69 | static inline int is_system_method(unative_t method) |
72 | static inline int is_system_method(unative_t method) |
| 70 | { |
73 | { |
| 71 | if (method <= IPC_M_LAST_SYSTEM) |
74 | if (method <= IPC_M_LAST_SYSTEM) |
| 72 | return 1; |
75 | return 1; |
| 73 | return 0; |
76 | return 0; |
| 74 | } |
77 | } |
| 75 | 78 | ||
| 76 | /** Decide if the message with this method is forwardable. |
79 | /** Decide if the message with this method is forwardable. |
| 77 | * |
80 | * |
| 78 | * - some system messages may be forwarded, for some of them |
81 | * - some system messages may be forwarded, for some of them |
| 79 | * it is useless |
82 | * it is useless |
| 80 | * |
83 | * |
| 81 | * @param method Method to be decided. |
84 | * @param method Method to be decided. |
| 82 | * |
85 | * |
| 83 | * @return Return 1 if the method is forwardable. |
86 | * @return Return 1 if the method is forwardable. |
| 84 | * Otherwise return 0. |
87 | * Otherwise return 0. |
| 85 | */ |
88 | */ |
| 86 | static inline int is_forwardable(unative_t method) |
89 | static inline int is_forwardable(unative_t method) |
| 87 | { |
90 | { |
| - | 91 | switch (method) { |
|
| - | 92 | case IPC_M_PHONE_HUNGUP: |
|
| 88 | if (method == IPC_M_PHONE_HUNGUP || method == IPC_M_AS_AREA_SEND || |
93 | case IPC_M_AS_AREA_SEND: |
| 89 | method == IPC_M_AS_AREA_RECV) |
94 | case IPC_M_AS_AREA_RECV: |
| - | 95 | case IPC_M_DATA_SEND: |
|
| 90 | return 0; /* This message is meant only for the receiver */ |
96 | /* This message is meant only for the original recipient. */ |
| - | 97 | return 0; |
|
| - | 98 | default: |
|
| 91 | return 1; |
99 | return 1; |
| - | 100 | } |
|
| 92 | } |
101 | } |
| 93 | 102 | ||
| 94 | 103 | ||
| 95 | /*********************************************************************** |
104 | /*********************************************************************** |
| 96 | * Functions that preprocess answer before sending it to the recepient. |
105 | * Functions that preprocess answer before sending it to the recepient. |
| 97 | ***********************************************************************/ |
106 | ***********************************************************************/ |
| 98 | 107 | ||
| 99 | /** Decide if the caller (e.g. ipc_answer()) should save the old call contents |
108 | /** Decide if the caller (e.g. ipc_answer()) should save the old call contents |
| 100 | * for answer_preprocess(). |
109 | * for answer_preprocess(). |
| 101 | * |
110 | * |
| 102 | * @param call Call structure to be decided. |
111 | * @param call Call structure to be decided. |
| 103 | * |
112 | * |
| 104 | * @return Return 1 if the old call contents should be saved. |
113 | * @return Return 1 if the old call contents should be saved. |
| 105 | * Return 0 otherwise. |
114 | * Return 0 otherwise. |
| 106 | */ |
115 | */ |
| 107 | static inline int answer_need_old(call_t *call) |
116 | static inline int answer_need_old(call_t *call) |
| 108 | { |
117 | { |
| 109 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
118 | switch (IPC_GET_METHOD(call->data)) { |
| 110 | return 1; |
119 | case IPC_M_CONNECT_TO_ME: |
| 111 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO) |
120 | case IPC_M_CONNECT_ME_TO: |
| 112 | return 1; |
- | |
| 113 | if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND) |
121 | case IPC_M_AS_AREA_SEND: |
| 114 | return 1; |
122 | case IPC_M_AS_AREA_RECV: |
| 115 | if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_RECV) |
123 | case IPC_M_DATA_SEND: |
| 116 | return 1; |
124 | return 1; |
| - | 125 | default: |
|
| 117 | return 0; |
126 | return 0; |
| - | 127 | } |
|
| 118 | } |
128 | } |
| 119 | 129 | ||
| 120 | /** Interpret process answer as control information. |
130 | /** Interpret process answer as control information. |
| 121 | * |
131 | * |
| 122 | * This function is called directly after sys_ipc_answer(). |
132 | * This function is called directly after sys_ipc_answer(). |
| 123 | * |
133 | * |
| 124 | * @param answer Call structure with the answer. |
134 | * @param answer Call structure with the answer. |
| 125 | * @param olddata Saved data of the request. |
135 | * @param olddata Saved data of the request. |
| 126 | * |
136 | * |
| 127 | * @return Return 0 on success or an error code. |
137 | * @return Return 0 on success or an error code. |
| 128 | */ |
138 | */ |
| 129 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
139 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
| 130 | { |
140 | { |
| 131 | int phoneid; |
141 | int phoneid; |
| 132 | 142 | ||
| 133 | if (IPC_GET_RETVAL(answer->data) == EHANGUP) { |
143 | if (IPC_GET_RETVAL(answer->data) == EHANGUP) { |
| 134 | /* In case of forward, hangup the forwared phone, |
144 | /* In case of forward, hangup the forwared phone, |
| 135 | * not the originator |
145 | * not the originator |
| 136 | */ |
146 | */ |
| 137 | spinlock_lock(&answer->data.phone->lock); |
147 | spinlock_lock(&answer->data.phone->lock); |
| 138 | spinlock_lock(&TASK->answerbox.lock); |
148 | spinlock_lock(&TASK->answerbox.lock); |
| 139 | if (answer->data.phone->state == IPC_PHONE_CONNECTED) { |
149 | if (answer->data.phone->state == IPC_PHONE_CONNECTED) { |
| 140 | list_remove(&answer->data.phone->link); |
150 | list_remove(&answer->data.phone->link); |
| 141 | answer->data.phone->state = IPC_PHONE_SLAMMED; |
151 | answer->data.phone->state = IPC_PHONE_SLAMMED; |
| 142 | } |
152 | } |
| 143 | spinlock_unlock(&TASK->answerbox.lock); |
153 | spinlock_unlock(&TASK->answerbox.lock); |
| 144 | spinlock_unlock(&answer->data.phone->lock); |
154 | spinlock_unlock(&answer->data.phone->lock); |
| 145 | } |
155 | } |
| 146 | 156 | ||
| 147 | if (!olddata) |
157 | if (!olddata) |
| 148 | return 0; |
158 | return 0; |
| 149 | 159 | ||
| 150 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
160 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
| 151 | phoneid = IPC_GET_ARG3(*olddata); |
161 | phoneid = IPC_GET_ARG3(*olddata); |
| 152 | if (IPC_GET_RETVAL(answer->data)) { |
162 | if (IPC_GET_RETVAL(answer->data)) { |
| 153 | /* The connection was not accepted */ |
163 | /* The connection was not accepted */ |
| 154 | phone_dealloc(phoneid); |
164 | phone_dealloc(phoneid); |
| 155 | } else { |
165 | } else { |
| 156 | /* The connection was accepted */ |
166 | /* The connection was accepted */ |
| 157 | phone_connect(phoneid, &answer->sender->answerbox); |
167 | phone_connect(phoneid, &answer->sender->answerbox); |
| 158 | /* Set 'phone hash' as arg3 of response */ |
168 | /* Set 'phone hash' as arg3 of response */ |
| 159 | IPC_SET_ARG3(answer->data, |
169 | IPC_SET_ARG3(answer->data, |
| 160 | (unative_t) &TASK->phones[phoneid]); |
170 | (unative_t) &TASK->phones[phoneid]); |
| 161 | } |
171 | } |
| 162 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
172 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
| 163 | /* If the users accepted call, connect */ |
173 | /* If the users accepted call, connect */ |
| 164 | if (!IPC_GET_RETVAL(answer->data)) { |
174 | if (!IPC_GET_RETVAL(answer->data)) { |
| 165 | ipc_phone_connect((phone_t *) IPC_GET_ARG3(*olddata), |
175 | ipc_phone_connect((phone_t *) IPC_GET_ARG3(*olddata), |
| 166 | &TASK->answerbox); |
176 | &TASK->answerbox); |
| 167 | } |
177 | } |
| 168 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) { |
178 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) { |
| 169 | if (!IPC_GET_RETVAL(answer->data)) { |
179 | if (!IPC_GET_RETVAL(answer->data)) { |
| 170 | /* Accepted, handle as_area receipt */ |
180 | /* Accepted, handle as_area receipt */ |
| 171 | ipl_t ipl; |
181 | ipl_t ipl; |
| 172 | int rc; |
182 | int rc; |
| 173 | as_t *as; |
183 | as_t *as; |
| 174 | 184 | ||
| 175 | ipl = interrupts_disable(); |
185 | ipl = interrupts_disable(); |
| 176 | spinlock_lock(&answer->sender->lock); |
186 | spinlock_lock(&answer->sender->lock); |
| 177 | as = answer->sender->as; |
187 | as = answer->sender->as; |
| 178 | spinlock_unlock(&answer->sender->lock); |
188 | spinlock_unlock(&answer->sender->lock); |
| 179 | interrupts_restore(ipl); |
189 | interrupts_restore(ipl); |
| 180 | 190 | ||
| 181 | rc = as_area_share(as, IPC_GET_ARG1(*olddata), |
191 | rc = as_area_share(as, IPC_GET_ARG1(*olddata), |
| 182 | IPC_GET_ARG2(*olddata), AS, |
192 | IPC_GET_ARG2(*olddata), AS, |
| 183 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
193 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
| 184 | IPC_SET_RETVAL(answer->data, rc); |
194 | IPC_SET_RETVAL(answer->data, rc); |
| 185 | return rc; |
195 | return rc; |
| 186 | } |
196 | } |
| 187 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) { |
197 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) { |
| 188 | if (!IPC_GET_RETVAL(answer->data)) { |
198 | if (!IPC_GET_RETVAL(answer->data)) { |
| 189 | ipl_t ipl; |
199 | ipl_t ipl; |
| 190 | as_t *as; |
200 | as_t *as; |
| 191 | int rc; |
201 | int rc; |
| 192 | 202 | ||
| 193 | ipl = interrupts_disable(); |
203 | ipl = interrupts_disable(); |
| 194 | spinlock_lock(&answer->sender->lock); |
204 | spinlock_lock(&answer->sender->lock); |
| 195 | as = answer->sender->as; |
205 | as = answer->sender->as; |
| 196 | spinlock_unlock(&answer->sender->lock); |
206 | spinlock_unlock(&answer->sender->lock); |
| 197 | interrupts_restore(ipl); |
207 | interrupts_restore(ipl); |
| 198 | 208 | ||
| 199 | rc = as_area_share(AS, IPC_GET_ARG1(answer->data), |
209 | rc = as_area_share(AS, IPC_GET_ARG1(answer->data), |
| 200 | IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata), |
210 | IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata), |
| 201 | IPC_GET_ARG2(answer->data)); |
211 | IPC_GET_ARG2(answer->data)); |
| 202 | IPC_SET_RETVAL(answer->data, rc); |
212 | IPC_SET_RETVAL(answer->data, rc); |
| 203 | } |
213 | } |
| - | 214 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_SEND) { |
|
| - | 215 | if (!IPC_GET_RETVAL(answer->data)) { |
|
| - | 216 | int rc; |
|
| - | 217 | uintptr_t dst; |
|
| - | 218 | uintptr_t size; |
|
| - | 219 | ||
| - | 220 | ASSERT(answer->buffer); |
|
| - | 221 | ||
| - | 222 | dst = IPC_GET_ARG1(answer->data); |
|
| - | 223 | size = IPC_GET_ARG3(answer->data); |
|
| - | 224 | ||
| - | 225 | rc = copy_to_uspace((void *) dst, answer->buffer, size); |
|
| - | 226 | if (rc != 0) |
|
| - | 227 | IPC_SET_RETVAL(answer->data, rc); |
|
| - | 228 | free(answer->buffer); |
|
| - | 229 | answer->buffer = NULL; |
|
| - | 230 | } |
|
| 204 | } |
231 | } |
| 205 | return 0; |
232 | return 0; |
| 206 | } |
233 | } |
| 207 | 234 | ||
| 208 | /** Called before the request is sent. |
235 | /** Called before the request is sent. |
| 209 | * |
236 | * |
| 210 | * @param call Call structure with the request. |
237 | * @param call Call structure with the request. |
| 211 | * |
238 | * |
| 212 | * @return Return 0 on success, ELIMIT or EPERM on error. |
239 | * @return Return 0 on success, ELIMIT or EPERM on error. |
| 213 | */ |
240 | */ |
| 214 | static int request_preprocess(call_t *call) |
241 | static int request_preprocess(call_t *call) |
| 215 | { |
242 | { |
| 216 | int newphid; |
243 | int newphid; |
| 217 | size_t size; |
244 | size_t size; |
| - | 245 | uintptr_t src; |
|
| - | 246 | int rc; |
|
| 218 | 247 | ||
| 219 | switch (IPC_GET_METHOD(call->data)) { |
248 | switch (IPC_GET_METHOD(call->data)) { |
| 220 | case IPC_M_CONNECT_ME_TO: |
249 | case IPC_M_CONNECT_ME_TO: |
| 221 | newphid = phone_alloc(); |
250 | newphid = phone_alloc(); |
| 222 | if (newphid < 0) |
251 | if (newphid < 0) |
| 223 | return ELIMIT; |
252 | return ELIMIT; |
| 224 | /* Set arg3 for server */ |
253 | /* Set arg3 for server */ |
| 225 | IPC_SET_ARG3(call->data, (unative_t) &TASK->phones[newphid]); |
254 | IPC_SET_ARG3(call->data, (unative_t) &TASK->phones[newphid]); |
| 226 | call->flags |= IPC_CALL_CONN_ME_TO; |
255 | call->flags |= IPC_CALL_CONN_ME_TO; |
| 227 | call->priv = newphid; |
256 | call->priv = newphid; |
| 228 | break; |
257 | break; |
| 229 | case IPC_M_AS_AREA_SEND: |
258 | case IPC_M_AS_AREA_SEND: |
| 230 | size = as_get_size(IPC_GET_ARG1(call->data)); |
259 | size = as_get_size(IPC_GET_ARG1(call->data)); |
| 231 | if (!size) |
260 | if (!size) |
| 232 | return EPERM; |
261 | return EPERM; |
| 233 | IPC_SET_ARG2(call->data, size); |
262 | IPC_SET_ARG2(call->data, size); |
| 234 | break; |
263 | break; |
| - | 264 | case IPC_M_DATA_SEND: |
|
| - | 265 | src = IPC_GET_ARG2(call->data); |
|
| - | 266 | size = IPC_GET_ARG3(call->data); |
|
| - | 267 | ||
| - | 268 | if ((size <= 0) || (size > DATA_SEND_LIMIT)) |
|
| - | 269 | return ELIMIT; |
|
| - | 270 | ||
| - | 271 | call->buffer = (uint8_t *) malloc(size, 0); |
|
| - | 272 | rc = copy_from_uspace(call->buffer, (void *) src, size); |
|
| - | 273 | if (rc != 0) { |
|
| - | 274 | free(call->buffer); |
|
| - | 275 | return rc; |
|
| - | 276 | } |
|
| - | 277 | break; |
|
| 235 | default: |
278 | default: |
| 236 | break; |
279 | break; |
| 237 | } |
280 | } |
| 238 | return 0; |
281 | return 0; |
| 239 | } |
282 | } |
| 240 | 283 | ||
| 241 | /******************************************************************************* |
284 | /******************************************************************************* |
| 242 | * Functions called to process received call/answer before passing it to uspace. |
285 | * Functions called to process received call/answer before passing it to uspace. |
| 243 | *******************************************************************************/ |
286 | *******************************************************************************/ |
| 244 | 287 | ||
| 245 | /** Do basic kernel processing of received call answer. |
288 | /** Do basic kernel processing of received call answer. |
| 246 | * |
289 | * |
| 247 | * @param call Call structure with the answer. |
290 | * @param call Call structure with the answer. |
| 248 | */ |
291 | */ |
| 249 | static void process_answer(call_t *call) |
292 | static void process_answer(call_t *call) |
| 250 | { |
293 | { |
| 251 | if (IPC_GET_RETVAL(call->data) == EHANGUP && |
294 | if (IPC_GET_RETVAL(call->data) == EHANGUP && |
| 252 | (call->flags & IPC_CALL_FORWARDED)) |
295 | (call->flags & IPC_CALL_FORWARDED)) |
| 253 | IPC_SET_RETVAL(call->data, EFORWARD); |
296 | IPC_SET_RETVAL(call->data, EFORWARD); |
| 254 | 297 | ||
| 255 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
298 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
| 256 | if (IPC_GET_RETVAL(call->data)) |
299 | if (IPC_GET_RETVAL(call->data)) |
| 257 | phone_dealloc(call->priv); |
300 | phone_dealloc(call->priv); |
| 258 | else |
301 | else |
| 259 | IPC_SET_ARG3(call->data, call->priv); |
302 | IPC_SET_ARG3(call->data, call->priv); |
| 260 | } |
303 | } |
| 261 | } |
304 | } |
| 262 | 305 | ||
| 263 | /** Do basic kernel processing of received call request. |
306 | /** Do basic kernel processing of received call request. |
| 264 | * |
307 | * |
| 265 | * @param box Destination answerbox structure. |
308 | * @param box Destination answerbox structure. |
| 266 | * @param call Call structure with the request. |
309 | * @param call Call structure with the request. |
| 267 | * |
310 | * |
| 268 | * @return Return 0 if the call should be passed to userspace. |
311 | * @return Return 0 if the call should be passed to userspace. |
| 269 | * Return -1 if the call should be ignored. |
312 | * Return -1 if the call should be ignored. |
| 270 | */ |
313 | */ |
| 271 | static int process_request(answerbox_t *box, call_t *call) |
314 | static int process_request(answerbox_t *box, call_t *call) |
| 272 | { |
315 | { |
| 273 | int phoneid; |
316 | int phoneid; |
| 274 | 317 | ||
| 275 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
318 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
| 276 | phoneid = phone_alloc(); |
319 | phoneid = phone_alloc(); |
| 277 | if (phoneid < 0) { /* Failed to allocate phone */ |
320 | if (phoneid < 0) { /* Failed to allocate phone */ |
| 278 | IPC_SET_RETVAL(call->data, ELIMIT); |
321 | IPC_SET_RETVAL(call->data, ELIMIT); |
| 279 | ipc_answer(box, call); |
322 | ipc_answer(box, call); |
| 280 | return -1; |
323 | return -1; |
| 281 | } |
324 | } |
| 282 | IPC_SET_ARG3(call->data, phoneid); |
325 | IPC_SET_ARG3(call->data, phoneid); |
| 283 | } |
326 | } |
| 284 | return 0; |
327 | return 0; |
| 285 | } |
328 | } |
| 286 | 329 | ||
| 287 | /** Make a fast call over IPC, wait for reply and return to user. |
330 | /** Make a fast call over IPC, wait for reply and return to user. |
| 288 | * |
331 | * |
| 289 | * This function can handle only one argument of payload, but is faster than |
332 | * This function can handle only one argument of payload, but is faster than |
| 290 | * the generic function (i.e. sys_ipc_call_sync()). |
333 | * the generic function (i.e. sys_ipc_call_sync()). |
| 291 | * |
334 | * |
| 292 | * @param phoneid Phone handle for the call. |
335 | * @param phoneid Phone handle for the call. |
| 293 | * @param method Method of the call. |
336 | * @param method Method of the call. |
| 294 | * @param arg1 Service-defined payload argument. |
337 | * @param arg1 Service-defined payload argument. |
| 295 | * @param data Address of userspace structure where the reply call will |
338 | * @param data Address of userspace structure where the reply call will |
| 296 | * be stored. |
339 | * be stored. |
| 297 | * |
340 | * |
| 298 | * @return Returns 0 on success. |
341 | * @return Returns 0 on success. |
| 299 | * Return ENOENT if there is no such phone handle. |
342 | * Return ENOENT if there is no such phone handle. |
| 300 | */ |
343 | */ |
| 301 | unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method, |
344 | unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method, |
| 302 | unative_t arg1, ipc_data_t *data) |
345 | unative_t arg1, ipc_data_t *data) |
| 303 | { |
346 | { |
| 304 | call_t call; |
347 | call_t call; |
| 305 | phone_t *phone; |
348 | phone_t *phone; |
| 306 | int res; |
349 | int res; |
| 307 | 350 | ||
| 308 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
351 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
| 309 | 352 | ||
| 310 | ipc_call_static_init(&call); |
353 | ipc_call_static_init(&call); |
| 311 | IPC_SET_METHOD(call.data, method); |
354 | IPC_SET_METHOD(call.data, method); |
| 312 | IPC_SET_ARG1(call.data, arg1); |
355 | IPC_SET_ARG1(call.data, arg1); |
| 313 | 356 | ||
| 314 | if (!(res = request_preprocess(&call))) { |
357 | if (!(res = request_preprocess(&call))) { |
| 315 | ipc_call_sync(phone, &call); |
358 | ipc_call_sync(phone, &call); |
| 316 | process_answer(&call); |
359 | process_answer(&call); |
| 317 | } else { |
360 | } else { |
| 318 | IPC_SET_RETVAL(call.data, res); |
361 | IPC_SET_RETVAL(call.data, res); |
| 319 | } |
362 | } |
| 320 | STRUCT_TO_USPACE(&data->args, &call.data.args); |
363 | STRUCT_TO_USPACE(&data->args, &call.data.args); |
| 321 | 364 | ||
| 322 | return 0; |
365 | return 0; |
| 323 | } |
366 | } |
| 324 | 367 | ||
| 325 | /** Make a synchronous IPC call allowing to transmit the entire payload. |
368 | /** Make a synchronous IPC call allowing to transmit the entire payload. |
| 326 | * |
369 | * |
| 327 | * @param phoneid Phone handle for the call. |
370 | * @param phoneid Phone handle for the call. |
| 328 | * @param question Userspace address of call data with the request. |
371 | * @param question Userspace address of call data with the request. |
| 329 | * @param reply Userspace address of call data where to store the answer. |
372 | * @param reply Userspace address of call data where to store the |
| - | 373 | * answer. |
|
| 330 | * |
374 | * |
| 331 | * @return Zero on success or an error code. |
375 | * @return Zero on success or an error code. |
| 332 | */ |
376 | */ |
| 333 | unative_t sys_ipc_call_sync(unative_t phoneid, ipc_data_t *question, |
377 | unative_t sys_ipc_call_sync(unative_t phoneid, ipc_data_t *question, |
| 334 | ipc_data_t *reply) |
378 | ipc_data_t *reply) |
| 335 | { |
379 | { |
| 336 | call_t call; |
380 | call_t call; |
| 337 | phone_t *phone; |
381 | phone_t *phone; |
| 338 | int res; |
382 | int res; |
| 339 | int rc; |
383 | int rc; |
| 340 | 384 | ||
| 341 | ipc_call_static_init(&call); |
385 | ipc_call_static_init(&call); |
| 342 | rc = copy_from_uspace(&call.data.args, &question->args, |
386 | rc = copy_from_uspace(&call.data.args, &question->args, |
| 343 | sizeof(call.data.args)); |
387 | sizeof(call.data.args)); |
| 344 | if (rc != 0) |
388 | if (rc != 0) |
| 345 | return (unative_t) rc; |
389 | return (unative_t) rc; |
| 346 | 390 | ||
| 347 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
391 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
| 348 | 392 | ||
| 349 | if (!(res = request_preprocess(&call))) { |
393 | if (!(res = request_preprocess(&call))) { |
| 350 | ipc_call_sync(phone, &call); |
394 | ipc_call_sync(phone, &call); |
| 351 | process_answer(&call); |
395 | process_answer(&call); |
| 352 | } else |
396 | } else |
| 353 | IPC_SET_RETVAL(call.data, res); |
397 | IPC_SET_RETVAL(call.data, res); |
| 354 | 398 | ||
| 355 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
399 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
| 356 | if (rc != 0) |
400 | if (rc != 0) |
| 357 | return rc; |
401 | return rc; |
| 358 | 402 | ||
| 359 | return 0; |
403 | return 0; |
| 360 | } |
404 | } |
| 361 | 405 | ||
| 362 | /** Check that the task did not exceed the allowed limit of asynchronous calls. |
406 | /** Check that the task did not exceed the allowed limit of asynchronous calls. |
| 363 | * |
407 | * |
| 364 | * @return Return 0 if limit not reached or -1 if limit exceeded. |
408 | * @return Return 0 if limit not reached or -1 if limit exceeded. |
| 365 | */ |
409 | */ |
| 366 | static int check_call_limit(void) |
410 | static int check_call_limit(void) |
| 367 | { |
411 | { |
| 368 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
412 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
| 369 | atomic_dec(&TASK->active_calls); |
413 | atomic_dec(&TASK->active_calls); |
| 370 | return -1; |
414 | return -1; |
| 371 | } |
415 | } |
| 372 | return 0; |
416 | return 0; |
| 373 | } |
417 | } |
| 374 | 418 | ||
| 375 | /** Make a fast asynchronous call over IPC. |
419 | /** Make a fast asynchronous call over IPC. |
| 376 | * |
420 | * |
| 377 | * This function can only handle two arguments of payload, but is faster than |
421 | * This function can only handle two arguments of payload, but is faster than |
| 378 | * the generic function sys_ipc_call_async(). |
422 | * the generic function sys_ipc_call_async(). |
| 379 | * |
423 | * |
| 380 | * @param phoneid Phone handle for the call. |
424 | * @param phoneid Phone handle for the call. |
| 381 | * @param method Method of the call. |
425 | * @param method Method of the call. |
| 382 | * @param arg1 Service-defined payload argument. |
426 | * @param arg1 Service-defined payload argument. |
| 383 | * @param arg2 Service-defined payload argument. |
427 | * @param arg2 Service-defined payload argument. |
| 384 | * |
428 | * |
| 385 | * @return Return call hash on success. |
429 | * @return Return call hash on success. |
| 386 | * Return IPC_CALLRET_FATAL in case of a fatal error and |
430 | * Return IPC_CALLRET_FATAL in case of a fatal error and |
| 387 | * IPC_CALLRET_TEMPORARY if there are too many pending |
431 | * IPC_CALLRET_TEMPORARY if there are too many pending |
| 388 | * asynchronous requests; answers should be handled first. |
432 | * asynchronous requests; answers should be handled first. |
| 389 | */ |
433 | */ |
| 390 | unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method, |
434 | unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method, |
| 391 | unative_t arg1, unative_t arg2) |
435 | unative_t arg1, unative_t arg2) |
| 392 | { |
436 | { |
| 393 | call_t *call; |
437 | call_t *call; |
| 394 | phone_t *phone; |
438 | phone_t *phone; |
| 395 | int res; |
439 | int res; |
| 396 | 440 | ||
| 397 | if (check_call_limit()) |
441 | if (check_call_limit()) |
| 398 | return IPC_CALLRET_TEMPORARY; |
442 | return IPC_CALLRET_TEMPORARY; |
| 399 | 443 | ||
| 400 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
444 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
| 401 | 445 | ||
| 402 | call = ipc_call_alloc(0); |
446 | call = ipc_call_alloc(0); |
| 403 | IPC_SET_METHOD(call->data, method); |
447 | IPC_SET_METHOD(call->data, method); |
| 404 | IPC_SET_ARG1(call->data, arg1); |
448 | IPC_SET_ARG1(call->data, arg1); |
| 405 | IPC_SET_ARG2(call->data, arg2); |
449 | IPC_SET_ARG2(call->data, arg2); |
| 406 | IPC_SET_ARG3(call->data, 0); |
450 | IPC_SET_ARG3(call->data, 0); |
| 407 | 451 | ||
| 408 | if (!(res = request_preprocess(call))) |
452 | if (!(res = request_preprocess(call))) |
| 409 | ipc_call(phone, call); |
453 | ipc_call(phone, call); |
| 410 | else |
454 | else |
| 411 | ipc_backsend_err(phone, call, res); |
455 | ipc_backsend_err(phone, call, res); |
| 412 | 456 | ||
| 413 | return (unative_t) call; |
457 | return (unative_t) call; |
| 414 | } |
458 | } |
| 415 | 459 | ||
| 416 | /** Make an asynchronous IPC call allowing to transmit the entire payload. |
460 | /** Make an asynchronous IPC call allowing to transmit the entire payload. |
| 417 | * |
461 | * |
| 418 | * @param phoneid Phone handle for the call. |
462 | * @param phoneid Phone handle for the call. |
| 419 | * @param data Userspace address of call data with the request. |
463 | * @param data Userspace address of call data with the request. |
| 420 | * |
464 | * |
| 421 | * @return See sys_ipc_call_async_fast(). |
465 | * @return See sys_ipc_call_async_fast(). |
| 422 | */ |
466 | */ |
| 423 | unative_t sys_ipc_call_async(unative_t phoneid, ipc_data_t *data) |
467 | unative_t sys_ipc_call_async(unative_t phoneid, ipc_data_t *data) |
| 424 | { |
468 | { |
| 425 | call_t *call; |
469 | call_t *call; |
| 426 | phone_t *phone; |
470 | phone_t *phone; |
| 427 | int res; |
471 | int res; |
| 428 | int rc; |
472 | int rc; |
| 429 | 473 | ||
| 430 | if (check_call_limit()) |
474 | if (check_call_limit()) |
| 431 | return IPC_CALLRET_TEMPORARY; |
475 | return IPC_CALLRET_TEMPORARY; |
| 432 | 476 | ||
| 433 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
477 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
| 434 | 478 | ||
| 435 | call = ipc_call_alloc(0); |
479 | call = ipc_call_alloc(0); |
| 436 | rc = copy_from_uspace(&call->data.args, &data->args, |
480 | rc = copy_from_uspace(&call->data.args, &data->args, |
| 437 | sizeof(call->data.args)); |
481 | sizeof(call->data.args)); |
| 438 | if (rc != 0) { |
482 | if (rc != 0) { |
| 439 | ipc_call_free(call); |
483 | ipc_call_free(call); |
| 440 | return (unative_t) rc; |
484 | return (unative_t) rc; |
| 441 | } |
485 | } |
| 442 | if (!(res = request_preprocess(call))) |
486 | if (!(res = request_preprocess(call))) |
| 443 | ipc_call(phone, call); |
487 | ipc_call(phone, call); |
| 444 | else |
488 | else |
| 445 | ipc_backsend_err(phone, call, res); |
489 | ipc_backsend_err(phone, call, res); |
| 446 | 490 | ||
| 447 | return (unative_t) call; |
491 | return (unative_t) call; |
| 448 | } |
492 | } |
| 449 | 493 | ||
| 450 | /** Forward a received call to another destination. |
494 | /** Forward a received call to another destination. |
| 451 | * |
495 | * |
| 452 | * @param callid Hash of the call to forward. |
496 | * @param callid Hash of the call to forward. |
| 453 | * @param phoneid Phone handle to use for forwarding. |
497 | * @param phoneid Phone handle to use for forwarding. |
| 454 | * @param method New method to use for the forwarded call. |
498 | * @param method New method to use for the forwarded call. |
| 455 | * @param arg1 New value of the first argument for the forwarded call. |
499 | * @param arg1 New value of the first argument for the forwarded call. |
| 456 | * |
500 | * |
| 457 | * @return Return 0 on succes, otherwise return an error code. |
501 | * @return Return 0 on succes, otherwise return an error code. |
| 458 | * |
502 | * |
| 459 | * In case the original method is a system method, ARG1 and ARG2 are overwritten |
503 | * In case the original method is a system method, ARG1 and ARG2 are overwritten |
| 460 | * in the forwarded message with the new method and the new arg1, respectively. |
504 | * in the forwarded message with the new method and the new arg1, respectively. |
| 461 | * Otherwise the METHOD and ARG1 are rewritten with the new method and arg1, |
505 | * Otherwise the METHOD and ARG1 are rewritten with the new method and arg1, |
| 462 | * respectively. |
506 | * respectively. |
| 463 | * |
507 | * |
| 464 | * Warning: If implementing non-fast version, make sure that |
508 | * Warning: If implementing non-fast version, make sure that |
| 465 | * ARG3 is not rewritten for certain system IPC |
509 | * ARG3 is not rewritten for certain system IPC |
| 466 | */ |
510 | */ |
| 467 | unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid, |
511 | unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid, |
| 468 | unative_t method, unative_t arg1) |
512 | unative_t method, unative_t arg1) |
| 469 | { |
513 | { |
| 470 | call_t *call; |
514 | call_t *call; |
| 471 | phone_t *phone; |
515 | phone_t *phone; |
| 472 | 516 | ||
| 473 | call = get_call(callid); |
517 | call = get_call(callid); |
| 474 | if (!call) |
518 | if (!call) |
| 475 | return ENOENT; |
519 | return ENOENT; |
| 476 | 520 | ||
| 477 | call->flags |= IPC_CALL_FORWARDED; |
521 | call->flags |= IPC_CALL_FORWARDED; |
| 478 | 522 | ||
| 479 | GET_CHECK_PHONE(phone, phoneid, { |
523 | GET_CHECK_PHONE(phone, phoneid, { |
| 480 | IPC_SET_RETVAL(call->data, EFORWARD); |
524 | IPC_SET_RETVAL(call->data, EFORWARD); |
| 481 | ipc_answer(&TASK->answerbox, call); |
525 | ipc_answer(&TASK->answerbox, call); |
| 482 | return ENOENT; |
526 | return ENOENT; |
| 483 | }); |
527 | }); |
| 484 | 528 | ||
| 485 | if (!is_forwardable(IPC_GET_METHOD(call->data))) { |
529 | if (!is_forwardable(IPC_GET_METHOD(call->data))) { |
| 486 | IPC_SET_RETVAL(call->data, EFORWARD); |
530 | IPC_SET_RETVAL(call->data, EFORWARD); |
| 487 | ipc_answer(&TASK->answerbox, call); |
531 | ipc_answer(&TASK->answerbox, call); |
| 488 | return EPERM; |
532 | return EPERM; |
| 489 | } |
533 | } |
| 490 | 534 | ||
| 491 | /* Userspace is not allowed to change method of system methods |
535 | /* Userspace is not allowed to change method of system methods |
| 492 | * on forward, allow changing ARG1 and ARG2 by means of method and arg1 |
536 | * on forward, allow changing ARG1 and ARG2 by means of method and arg1 |
| 493 | */ |
537 | */ |
| 494 | if (is_system_method(IPC_GET_METHOD(call->data))) { |
538 | if (is_system_method(IPC_GET_METHOD(call->data))) { |
| 495 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
539 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
| 496 | phone_dealloc(IPC_GET_ARG3(call->data)); |
540 | phone_dealloc(IPC_GET_ARG3(call->data)); |
| 497 | 541 | ||
| 498 | IPC_SET_ARG1(call->data, method); |
542 | IPC_SET_ARG1(call->data, method); |
| 499 | IPC_SET_ARG2(call->data, arg1); |
543 | IPC_SET_ARG2(call->data, arg1); |
| 500 | } else { |
544 | } else { |
| 501 | IPC_SET_METHOD(call->data, method); |
545 | IPC_SET_METHOD(call->data, method); |
| 502 | IPC_SET_ARG1(call->data, arg1); |
546 | IPC_SET_ARG1(call->data, arg1); |
| 503 | } |
547 | } |
| 504 | 548 | ||
| 505 | return ipc_forward(call, phone, &TASK->answerbox); |
549 | return ipc_forward(call, phone, &TASK->answerbox); |
| 506 | } |
550 | } |
| 507 | 551 | ||
| 508 | /** Answer an IPC call - fast version. |
552 | /** Answer an IPC call - fast version. |
| 509 | * |
553 | * |
| 510 | * This function can handle only two return arguments of payload, but is faster |
554 | * This function can handle only two return arguments of payload, but is faster |
| 511 | * than the generic sys_ipc_answer(). |
555 | * than the generic sys_ipc_answer(). |
| 512 | * |
556 | * |
| 513 | * @param callid Hash of the call to be answered. |
557 | * @param callid Hash of the call to be answered. |
| 514 | * @param retval Return value of the answer. |
558 | * @param retval Return value of the answer. |
| 515 | * @param arg1 Service-defined return value. |
559 | * @param arg1 Service-defined return value. |
| 516 | * @param arg2 Service-defined return value. |
560 | * @param arg2 Service-defined return value. |
| 517 | * |
561 | * |
| 518 | * @return Return 0 on success, otherwise return an error code. |
562 | * @return Return 0 on success, otherwise return an error code. |
| 519 | */ |
563 | */ |
| 520 | unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, |
564 | unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, |
| 521 | unative_t arg1, unative_t arg2) |
565 | unative_t arg1, unative_t arg2) |
| 522 | { |
566 | { |
| 523 | call_t *call; |
567 | call_t *call; |
| 524 | ipc_data_t saved_data; |
568 | ipc_data_t saved_data; |
| 525 | int saveddata = 0; |
569 | int saveddata = 0; |
| 526 | int rc; |
570 | int rc; |
| 527 | 571 | ||
| 528 | /* Do not answer notification callids */ |
572 | /* Do not answer notification callids */ |
| 529 | if (callid & IPC_CALLID_NOTIFICATION) |
573 | if (callid & IPC_CALLID_NOTIFICATION) |
| 530 | return 0; |
574 | return 0; |
| 531 | 575 | ||
| 532 | call = get_call(callid); |
576 | call = get_call(callid); |
| 533 | if (!call) |
577 | if (!call) |
| 534 | return ENOENT; |
578 | return ENOENT; |
| 535 | 579 | ||
| 536 | if (answer_need_old(call)) { |
580 | if (answer_need_old(call)) { |
| 537 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
581 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
| 538 | saveddata = 1; |
582 | saveddata = 1; |
| 539 | } |
583 | } |
| 540 | 584 | ||
| 541 | IPC_SET_RETVAL(call->data, retval); |
585 | IPC_SET_RETVAL(call->data, retval); |
| 542 | IPC_SET_ARG1(call->data, arg1); |
586 | IPC_SET_ARG1(call->data, arg1); |
| 543 | IPC_SET_ARG2(call->data, arg2); |
587 | IPC_SET_ARG2(call->data, arg2); |
| 544 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
588 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
| 545 | 589 | ||
| 546 | ipc_answer(&TASK->answerbox, call); |
590 | ipc_answer(&TASK->answerbox, call); |
| 547 | return rc; |
591 | return rc; |
| 548 | } |
592 | } |
| 549 | 593 | ||
| 550 | /** Answer an IPC call. |
594 | /** Answer an IPC call. |
| 551 | * |
595 | * |
| 552 | * @param callid Hash of the call to be answered. |
596 | * @param callid Hash of the call to be answered. |
| 553 | * @param data Userspace address of call data with the answer. |
597 | * @param data Userspace address of call data with the answer. |
| 554 | * |
598 | * |
| 555 | * @return Return 0 on success, otherwise return an error code. |
599 | * @return Return 0 on success, otherwise return an error code. |
| 556 | */ |
600 | */ |
| 557 | unative_t sys_ipc_answer(unative_t callid, ipc_data_t *data) |
601 | unative_t sys_ipc_answer(unative_t callid, ipc_data_t *data) |
| 558 | { |
602 | { |
| 559 | call_t *call; |
603 | call_t *call; |
| 560 | ipc_data_t saved_data; |
604 | ipc_data_t saved_data; |
| 561 | int saveddata = 0; |
605 | int saveddata = 0; |
| 562 | int rc; |
606 | int rc; |
| 563 | 607 | ||
| 564 | /* Do not answer notification callids */ |
608 | /* Do not answer notification callids */ |
| 565 | if (callid & IPC_CALLID_NOTIFICATION) |
609 | if (callid & IPC_CALLID_NOTIFICATION) |
| 566 | return 0; |
610 | return 0; |
| 567 | 611 | ||
| 568 | call = get_call(callid); |
612 | call = get_call(callid); |
| 569 | if (!call) |
613 | if (!call) |
| 570 | return ENOENT; |
614 | return ENOENT; |
| 571 | 615 | ||
| 572 | if (answer_need_old(call)) { |
616 | if (answer_need_old(call)) { |
| 573 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
617 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
| 574 | saveddata = 1; |
618 | saveddata = 1; |
| 575 | } |
619 | } |
| 576 | rc = copy_from_uspace(&call->data.args, &data->args, |
620 | rc = copy_from_uspace(&call->data.args, &data->args, |
| 577 | sizeof(call->data.args)); |
621 | sizeof(call->data.args)); |
| 578 | if (rc != 0) |
622 | if (rc != 0) |
| 579 | return rc; |
623 | return rc; |
| 580 | 624 | ||
| 581 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
625 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
| 582 | 626 | ||
| 583 | ipc_answer(&TASK->answerbox, call); |
627 | ipc_answer(&TASK->answerbox, call); |
| 584 | 628 | ||
| 585 | return rc; |
629 | return rc; |
| 586 | } |
630 | } |
| 587 | 631 | ||
| 588 | /** Hang up a phone. |
632 | /** Hang up a phone. |
| 589 | * |
633 | * |
| 590 | * @param Phone handle of the phone to be hung up. |
634 | * @param Phone handle of the phone to be hung up. |
| 591 | * |
635 | * |
| 592 | * @return Return 0 on success or an error code. |
636 | * @return Return 0 on success or an error code. |
| 593 | */ |
637 | */ |
| 594 | unative_t sys_ipc_hangup(int phoneid) |
638 | unative_t sys_ipc_hangup(int phoneid) |
| 595 | { |
639 | { |
| 596 | phone_t *phone; |
640 | phone_t *phone; |
| 597 | 641 | ||
| 598 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
642 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
| 599 | 643 | ||
| 600 | if (ipc_phone_hangup(phone)) |
644 | if (ipc_phone_hangup(phone)) |
| 601 | return -1; |
645 | return -1; |
| 602 | 646 | ||
| 603 | return 0; |
647 | return 0; |
| 604 | } |
648 | } |
| 605 | 649 | ||
| 606 | /** Wait for an incoming IPC call or an answer. |
650 | /** Wait for an incoming IPC call or an answer. |
| 607 | * |
651 | * |
| 608 | * @param calldata Pointer to buffer where the call/answer data is stored. |
652 | * @param calldata Pointer to buffer where the call/answer data is stored. |
| 609 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
653 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
| 610 | * @param flags Select mode of sleep operation. See waitq_sleep_timeout() |
654 | * @param flags Select mode of sleep operation. See waitq_sleep_timeout() |
| 611 | * for explanation. |
655 | * for explanation. |
| 612 | * |
656 | * |
| 613 | * @return Hash of the call. |
657 | * @return Hash of the call. |
| 614 | * If IPC_CALLID_NOTIFICATION bit is set in the hash, the |
658 | * If IPC_CALLID_NOTIFICATION bit is set in the hash, the |
| 615 | * call is a notification. IPC_CALLID_ANSWERED denotes an |
659 | * call is a notification. IPC_CALLID_ANSWERED denotes an |
| 616 | * answer. |
660 | * answer. |
| 617 | */ |
661 | */ |
| 618 | unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags) |
662 | unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags) |
| 619 | { |
663 | { |
| 620 | call_t *call; |
664 | call_t *call; |
| 621 | 665 | ||
| 622 | restart: |
666 | restart: |
| 623 | call = ipc_wait_for_call(&TASK->answerbox, usec, |
667 | call = ipc_wait_for_call(&TASK->answerbox, usec, |
| 624 | flags | SYNCH_FLAGS_INTERRUPTIBLE); |
668 | flags | SYNCH_FLAGS_INTERRUPTIBLE); |
| 625 | if (!call) |
669 | if (!call) |
| 626 | return 0; |
670 | return 0; |
| 627 | 671 | ||
| 628 | if (call->flags & IPC_CALL_NOTIF) { |
672 | if (call->flags & IPC_CALL_NOTIF) { |
| 629 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
673 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
| 630 | 674 | ||
| 631 | /* Set in_phone_hash to the interrupt counter */ |
675 | /* Set in_phone_hash to the interrupt counter */ |
| 632 | call->data.phone = (void *) call->priv; |
676 | call->data.phone = (void *) call->priv; |
| 633 | 677 | ||
| 634 | STRUCT_TO_USPACE(calldata, &call->data); |
678 | STRUCT_TO_USPACE(calldata, &call->data); |
| 635 | 679 | ||
| 636 | ipc_call_free(call); |
680 | ipc_call_free(call); |
| 637 | 681 | ||
| 638 | return ((unative_t) call) | IPC_CALLID_NOTIFICATION; |
682 | return ((unative_t) call) | IPC_CALLID_NOTIFICATION; |
| 639 | } |
683 | } |
| 640 | 684 | ||
| 641 | if (call->flags & IPC_CALL_ANSWERED) { |
685 | if (call->flags & IPC_CALL_ANSWERED) { |
| 642 | process_answer(call); |
686 | process_answer(call); |
| 643 | 687 | ||
| 644 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
688 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
| 645 | 689 | ||
| 646 | atomic_dec(&TASK->active_calls); |
690 | atomic_dec(&TASK->active_calls); |
| 647 | 691 | ||
| 648 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
692 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
| 649 | ipc_call_free(call); |
693 | ipc_call_free(call); |
| 650 | goto restart; |
694 | goto restart; |
| 651 | } |
695 | } |
| 652 | 696 | ||
| 653 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
697 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
| 654 | ipc_call_free(call); |
698 | ipc_call_free(call); |
| 655 | 699 | ||
| 656 | return ((unative_t) call) | IPC_CALLID_ANSWERED; |
700 | return ((unative_t) call) | IPC_CALLID_ANSWERED; |
| 657 | } |
701 | } |
| 658 | 702 | ||
| 659 | if (process_request(&TASK->answerbox, call)) |
703 | if (process_request(&TASK->answerbox, call)) |
| 660 | goto restart; |
704 | goto restart; |
| 661 | 705 | ||
| 662 | /* Include phone address('id') of the caller in the request, |
706 | /* Include phone address('id') of the caller in the request, |
| 663 | * copy whole call->data, not only call->data.args */ |
707 | * copy whole call->data, not only call->data.args */ |
| 664 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
708 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
| 665 | return 0; |
709 | return 0; |
| 666 | } |
710 | } |
| 667 | return (unative_t)call; |
711 | return (unative_t)call; |
| 668 | } |
712 | } |
| 669 | 713 | ||
| 670 | /** Connect an IRQ handler to a task. |
714 | /** Connect an IRQ handler to a task. |
| 671 | * |
715 | * |
| 672 | * @param inr IRQ number. |
716 | * @param inr IRQ number. |
| 673 | * @param devno Device number. |
717 | * @param devno Device number. |
| 674 | * @param method Method to be associated with the notification. |
718 | * @param method Method to be associated with the notification. |
| 675 | * @param ucode Uspace pointer to the top-half pseudocode. |
719 | * @param ucode Uspace pointer to the top-half pseudocode. |
| 676 | * |
720 | * |
| 677 | * @return EPERM or a return code returned by ipc_irq_register(). |
721 | * @return EPERM or a return code returned by ipc_irq_register(). |
| 678 | */ |
722 | */ |
| 679 | unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method, |
723 | unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method, |
| 680 | irq_code_t *ucode) |
724 | irq_code_t *ucode) |
| 681 | { |
725 | { |
| 682 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
726 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
| 683 | return EPERM; |
727 | return EPERM; |
| 684 | 728 | ||
| 685 | return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode); |
729 | return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode); |
| 686 | } |
730 | } |
| 687 | 731 | ||
| 688 | /** Disconnect an IRQ handler from a task. |
732 | /** Disconnect an IRQ handler from a task. |
| 689 | * |
733 | * |
| 690 | * @param inr IRQ number. |
734 | * @param inr IRQ number. |
| 691 | * @param devno Device number. |
735 | * @param devno Device number. |
| 692 | * |
736 | * |
| 693 | * @return Zero on success or EPERM on error.. |
737 | * @return Zero on success or EPERM on error.. |
| 694 | */ |
738 | */ |
| 695 | unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno) |
739 | unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno) |
| 696 | { |
740 | { |
| 697 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
741 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
| 698 | return EPERM; |
742 | return EPERM; |
| 699 | 743 | ||
| 700 | ipc_irq_unregister(&TASK->answerbox, inr, devno); |
744 | ipc_irq_unregister(&TASK->answerbox, inr, devno); |
| 701 | 745 | ||
| 702 | return 0; |
746 | return 0; |
| 703 | } |
747 | } |
| 704 | 748 | ||
| 705 | /** @} |
749 | /** @} |
| 706 | */ |
750 | */ |
| 707 | 751 | ||