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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. */ |
52 | /** Maximum buffer size allowed for IPC_M_DATA_SEND requests. */ |
53 | #define DATA_SEND_LIMIT (64 * 1024) |
53 | #define DATA_SEND_LIMIT (64 * 1024) |
54 | 54 | ||
55 | #define GET_CHECK_PHONE(phone, phoneid, err) \ |
55 | #define GET_CHECK_PHONE(phone, phoneid, err) \ |
56 | { \ |
56 | { \ |
57 | if (phoneid > IPC_MAX_PHONES) { \ |
57 | if (phoneid > IPC_MAX_PHONES) { \ |
58 | err; \ |
58 | err; \ |
59 | } \ |
59 | } \ |
60 | phone = &TASK->phones[phoneid]; \ |
60 | phone = &TASK->phones[phoneid]; \ |
61 | } |
61 | } |
62 | 62 | ||
63 | #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))) |
64 | 64 | ||
65 | /** Decide if the method is a system method. |
65 | /** Decide if the method is a system method. |
66 | * |
66 | * |
67 | * @param method Method to be decided. |
67 | * @param method Method to be decided. |
68 | * |
68 | * |
69 | * @return Return 1 if the method is a system method. |
69 | * @return Return 1 if the method is a system method. |
70 | * Otherwise return 0. |
70 | * Otherwise return 0. |
71 | */ |
71 | */ |
72 | static inline int is_system_method(unative_t method) |
72 | static inline int method_is_system(unative_t method) |
73 | { |
73 | { |
74 | if (method <= IPC_M_LAST_SYSTEM) |
74 | if (method <= IPC_M_LAST_SYSTEM) |
75 | return 1; |
75 | return 1; |
76 | return 0; |
76 | return 0; |
77 | } |
77 | } |
78 | 78 | ||
79 | /** Decide if the message with this method is forwardable. |
79 | /** Decide if the message with this method is forwardable. |
80 | * |
80 | * |
81 | * - some system messages may be forwarded, for some of them |
81 | * - some system messages may be forwarded, for some of them |
82 | * it is useless |
82 | * it is useless |
83 | * |
83 | * |
84 | * @param method Method to be decided. |
84 | * @param method Method to be decided. |
85 | * |
85 | * |
86 | * @return Return 1 if the method is forwardable. |
86 | * @return Return 1 if the method is forwardable. |
87 | * Otherwise return 0. |
87 | * Otherwise return 0. |
88 | */ |
88 | */ |
89 | static inline int is_forwardable(unative_t method) |
89 | static inline int method_is_forwardable(unative_t method) |
90 | { |
90 | { |
91 | switch (method) { |
91 | switch (method) { |
92 | case IPC_M_PHONE_HUNGUP: |
92 | case IPC_M_PHONE_HUNGUP: |
93 | case IPC_M_AS_AREA_SEND: |
- | |
94 | case IPC_M_AS_AREA_RECV: |
- | |
95 | case IPC_M_DATA_SEND: |
- | |
96 | /* This message is meant only for the original recipient. */ |
93 | /* This message is meant only for the original recipient. */ |
97 | return 0; |
94 | return 0; |
98 | default: |
95 | default: |
99 | return 1; |
96 | return 1; |
100 | } |
97 | } |
101 | } |
98 | } |
102 | 99 | ||
- | 100 | /** Decide if the message with this method is immutable on forward. |
|
- | 101 | * |
|
- | 102 | * - some system messages may be forwarded, for some of them |
|
- | 103 | * it is useless |
|
- | 104 | * |
|
- | 105 | * @param method Method to be decided. |
|
- | 106 | * |
|
- | 107 | * @return Return 1 if the method is immutable on forward. |
|
- | 108 | * Otherwise return 0. |
|
- | 109 | */ |
|
- | 110 | static inline int method_is_immutable(unative_t method) |
|
- | 111 | { |
|
- | 112 | switch (method) { |
|
- | 113 | case IPC_M_AS_AREA_SEND: |
|
- | 114 | case IPC_M_AS_AREA_RECV: |
|
- | 115 | case IPC_M_DATA_SEND: |
|
- | 116 | return 1; |
|
- | 117 | break; |
|
- | 118 | default: |
|
- | 119 | return 0; |
|
- | 120 | } |
|
- | 121 | } |
|
- | 122 | ||
103 | 123 | ||
104 | /*********************************************************************** |
124 | /*********************************************************************** |
105 | * Functions that preprocess answer before sending it to the recepient. |
125 | * Functions that preprocess answer before sending it to the recepient. |
106 | ***********************************************************************/ |
126 | ***********************************************************************/ |
107 | 127 | ||
108 | /** Decide if the caller (e.g. ipc_answer()) should save the old call contents |
128 | /** Decide if the caller (e.g. ipc_answer()) should save the old call contents |
109 | * for answer_preprocess(). |
129 | * for answer_preprocess(). |
110 | * |
130 | * |
111 | * @param call Call structure to be decided. |
131 | * @param call Call structure to be decided. |
112 | * |
132 | * |
113 | * @return Return 1 if the old call contents should be saved. |
133 | * @return Return 1 if the old call contents should be saved. |
114 | * Return 0 otherwise. |
134 | * Return 0 otherwise. |
115 | */ |
135 | */ |
116 | static inline int answer_need_old(call_t *call) |
136 | static inline int answer_need_old(call_t *call) |
117 | { |
137 | { |
118 | switch (IPC_GET_METHOD(call->data)) { |
138 | switch (IPC_GET_METHOD(call->data)) { |
119 | case IPC_M_CONNECT_TO_ME: |
139 | case IPC_M_CONNECT_TO_ME: |
120 | case IPC_M_CONNECT_ME_TO: |
140 | case IPC_M_CONNECT_ME_TO: |
121 | case IPC_M_AS_AREA_SEND: |
141 | case IPC_M_AS_AREA_SEND: |
122 | case IPC_M_AS_AREA_RECV: |
142 | case IPC_M_AS_AREA_RECV: |
123 | case IPC_M_DATA_SEND: |
143 | case IPC_M_DATA_SEND: |
124 | return 1; |
144 | return 1; |
125 | default: |
145 | default: |
126 | return 0; |
146 | return 0; |
127 | } |
147 | } |
128 | } |
148 | } |
129 | 149 | ||
130 | /** Interpret process answer as control information. |
150 | /** Interpret process answer as control information. |
131 | * |
151 | * |
132 | * This function is called directly after sys_ipc_answer(). |
152 | * This function is called directly after sys_ipc_answer(). |
133 | * |
153 | * |
134 | * @param answer Call structure with the answer. |
154 | * @param answer Call structure with the answer. |
135 | * @param olddata Saved data of the request. |
155 | * @param olddata Saved data of the request. |
136 | * |
156 | * |
137 | * @return Return 0 on success or an error code. |
157 | * @return Return 0 on success or an error code. |
138 | */ |
158 | */ |
139 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
159 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
140 | { |
160 | { |
141 | int phoneid; |
161 | int phoneid; |
142 | 162 | ||
143 | if (IPC_GET_RETVAL(answer->data) == EHANGUP) { |
163 | if (IPC_GET_RETVAL(answer->data) == EHANGUP) { |
144 | /* In case of forward, hangup the forwared phone, |
164 | /* In case of forward, hangup the forwared phone, |
145 | * not the originator |
165 | * not the originator |
146 | */ |
166 | */ |
147 | spinlock_lock(&answer->data.phone->lock); |
167 | spinlock_lock(&answer->data.phone->lock); |
148 | spinlock_lock(&TASK->answerbox.lock); |
168 | spinlock_lock(&TASK->answerbox.lock); |
149 | if (answer->data.phone->state == IPC_PHONE_CONNECTED) { |
169 | if (answer->data.phone->state == IPC_PHONE_CONNECTED) { |
150 | list_remove(&answer->data.phone->link); |
170 | list_remove(&answer->data.phone->link); |
151 | answer->data.phone->state = IPC_PHONE_SLAMMED; |
171 | answer->data.phone->state = IPC_PHONE_SLAMMED; |
152 | } |
172 | } |
153 | spinlock_unlock(&TASK->answerbox.lock); |
173 | spinlock_unlock(&TASK->answerbox.lock); |
154 | spinlock_unlock(&answer->data.phone->lock); |
174 | spinlock_unlock(&answer->data.phone->lock); |
155 | } |
175 | } |
156 | 176 | ||
157 | if (!olddata) |
177 | if (!olddata) |
158 | return 0; |
178 | return 0; |
159 | 179 | ||
160 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
180 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
161 | phoneid = IPC_GET_ARG3(*olddata); |
181 | phoneid = IPC_GET_ARG3(*olddata); |
162 | if (IPC_GET_RETVAL(answer->data)) { |
182 | if (IPC_GET_RETVAL(answer->data)) { |
163 | /* The connection was not accepted */ |
183 | /* The connection was not accepted */ |
164 | phone_dealloc(phoneid); |
184 | phone_dealloc(phoneid); |
165 | } else { |
185 | } else { |
166 | /* The connection was accepted */ |
186 | /* The connection was accepted */ |
167 | phone_connect(phoneid, &answer->sender->answerbox); |
187 | phone_connect(phoneid, &answer->sender->answerbox); |
168 | /* Set 'phone hash' as arg3 of response */ |
188 | /* Set 'phone hash' as arg3 of response */ |
169 | IPC_SET_ARG3(answer->data, |
189 | IPC_SET_ARG3(answer->data, |
170 | (unative_t) &TASK->phones[phoneid]); |
190 | (unative_t) &TASK->phones[phoneid]); |
171 | } |
191 | } |
172 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
192 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
173 | /* If the users accepted call, connect */ |
193 | /* If the users accepted call, connect */ |
174 | if (!IPC_GET_RETVAL(answer->data)) { |
194 | if (!IPC_GET_RETVAL(answer->data)) { |
175 | ipc_phone_connect((phone_t *) IPC_GET_ARG3(*olddata), |
195 | ipc_phone_connect((phone_t *) IPC_GET_ARG3(*olddata), |
176 | &TASK->answerbox); |
196 | &TASK->answerbox); |
177 | } |
197 | } |
178 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) { |
198 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) { |
179 | if (!IPC_GET_RETVAL(answer->data)) { |
199 | if (!IPC_GET_RETVAL(answer->data)) { |
180 | /* Accepted, handle as_area receipt */ |
200 | /* Accepted, handle as_area receipt */ |
181 | ipl_t ipl; |
201 | ipl_t ipl; |
182 | int rc; |
202 | int rc; |
183 | as_t *as; |
203 | as_t *as; |
184 | 204 | ||
185 | ipl = interrupts_disable(); |
205 | ipl = interrupts_disable(); |
186 | spinlock_lock(&answer->sender->lock); |
206 | spinlock_lock(&answer->sender->lock); |
187 | as = answer->sender->as; |
207 | as = answer->sender->as; |
188 | spinlock_unlock(&answer->sender->lock); |
208 | spinlock_unlock(&answer->sender->lock); |
189 | interrupts_restore(ipl); |
209 | interrupts_restore(ipl); |
190 | 210 | ||
191 | rc = as_area_share(as, IPC_GET_ARG1(*olddata), |
211 | rc = as_area_share(as, IPC_GET_ARG1(*olddata), |
192 | IPC_GET_ARG2(*olddata), AS, |
212 | IPC_GET_ARG2(*olddata), AS, |
193 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
213 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
194 | IPC_SET_RETVAL(answer->data, rc); |
214 | IPC_SET_RETVAL(answer->data, rc); |
195 | return rc; |
215 | return rc; |
196 | } |
216 | } |
197 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) { |
217 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) { |
198 | if (!IPC_GET_RETVAL(answer->data)) { |
218 | if (!IPC_GET_RETVAL(answer->data)) { |
199 | ipl_t ipl; |
219 | ipl_t ipl; |
200 | as_t *as; |
220 | as_t *as; |
201 | int rc; |
221 | int rc; |
202 | 222 | ||
203 | ipl = interrupts_disable(); |
223 | ipl = interrupts_disable(); |
204 | spinlock_lock(&answer->sender->lock); |
224 | spinlock_lock(&answer->sender->lock); |
205 | as = answer->sender->as; |
225 | as = answer->sender->as; |
206 | spinlock_unlock(&answer->sender->lock); |
226 | spinlock_unlock(&answer->sender->lock); |
207 | interrupts_restore(ipl); |
227 | interrupts_restore(ipl); |
208 | 228 | ||
209 | rc = as_area_share(AS, IPC_GET_ARG1(answer->data), |
229 | rc = as_area_share(AS, IPC_GET_ARG1(answer->data), |
210 | IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata), |
230 | IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata), |
211 | IPC_GET_ARG2(answer->data)); |
231 | IPC_GET_ARG2(answer->data)); |
212 | IPC_SET_RETVAL(answer->data, rc); |
232 | IPC_SET_RETVAL(answer->data, rc); |
213 | } |
233 | } |
214 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_SEND) { |
234 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_SEND) { |
215 | if (!IPC_GET_RETVAL(answer->data)) { |
235 | if (!IPC_GET_RETVAL(answer->data)) { |
216 | int rc; |
236 | int rc; |
217 | uintptr_t dst; |
237 | uintptr_t dst; |
218 | uintptr_t size; |
238 | uintptr_t size; |
219 | 239 | ||
220 | ASSERT(answer->buffer); |
240 | ASSERT(answer->buffer); |
221 | 241 | ||
222 | dst = IPC_GET_ARG1(answer->data); |
242 | dst = IPC_GET_ARG1(answer->data); |
223 | size = IPC_GET_ARG3(answer->data); |
243 | size = IPC_GET_ARG3(answer->data); |
224 | 244 | ||
225 | rc = copy_to_uspace((void *) dst, answer->buffer, size); |
245 | rc = copy_to_uspace((void *) dst, answer->buffer, size); |
226 | if (rc != 0) |
246 | if (rc != 0) |
227 | IPC_SET_RETVAL(answer->data, rc); |
247 | IPC_SET_RETVAL(answer->data, rc); |
228 | free(answer->buffer); |
248 | free(answer->buffer); |
229 | answer->buffer = NULL; |
249 | answer->buffer = NULL; |
230 | } |
250 | } |
231 | } |
251 | } |
232 | return 0; |
252 | return 0; |
233 | } |
253 | } |
234 | 254 | ||
235 | /** Called before the request is sent. |
255 | /** Called before the request is sent. |
236 | * |
256 | * |
237 | * @param call Call structure with the request. |
257 | * @param call Call structure with the request. |
238 | * |
258 | * |
239 | * @return Return 0 on success, ELIMIT or EPERM on error. |
259 | * @return Return 0 on success, ELIMIT or EPERM on error. |
240 | */ |
260 | */ |
241 | static int request_preprocess(call_t *call) |
261 | static int request_preprocess(call_t *call) |
242 | { |
262 | { |
243 | int newphid; |
263 | int newphid; |
244 | size_t size; |
264 | size_t size; |
245 | uintptr_t src; |
265 | uintptr_t src; |
246 | int rc; |
266 | int rc; |
247 | 267 | ||
248 | switch (IPC_GET_METHOD(call->data)) { |
268 | switch (IPC_GET_METHOD(call->data)) { |
249 | case IPC_M_CONNECT_ME_TO: |
269 | case IPC_M_CONNECT_ME_TO: |
250 | newphid = phone_alloc(); |
270 | newphid = phone_alloc(); |
251 | if (newphid < 0) |
271 | if (newphid < 0) |
252 | return ELIMIT; |
272 | return ELIMIT; |
253 | /* Set arg3 for server */ |
273 | /* Set arg3 for server */ |
254 | IPC_SET_ARG3(call->data, (unative_t) &TASK->phones[newphid]); |
274 | IPC_SET_ARG3(call->data, (unative_t) &TASK->phones[newphid]); |
255 | call->flags |= IPC_CALL_CONN_ME_TO; |
275 | call->flags |= IPC_CALL_CONN_ME_TO; |
256 | call->priv = newphid; |
276 | call->priv = newphid; |
257 | break; |
277 | break; |
258 | case IPC_M_AS_AREA_SEND: |
278 | case IPC_M_AS_AREA_SEND: |
259 | size = as_area_get_size(IPC_GET_ARG1(call->data)); |
279 | size = as_area_get_size(IPC_GET_ARG1(call->data)); |
260 | if (!size) |
280 | if (!size) |
261 | return EPERM; |
281 | return EPERM; |
262 | IPC_SET_ARG2(call->data, size); |
282 | IPC_SET_ARG2(call->data, size); |
263 | break; |
283 | break; |
264 | case IPC_M_DATA_SEND: |
284 | case IPC_M_DATA_SEND: |
265 | src = IPC_GET_ARG2(call->data); |
285 | src = IPC_GET_ARG2(call->data); |
266 | size = IPC_GET_ARG3(call->data); |
286 | size = IPC_GET_ARG3(call->data); |
267 | 287 | ||
268 | if ((size <= 0) || (size > DATA_SEND_LIMIT)) |
288 | if ((size <= 0) || (size > DATA_SEND_LIMIT)) |
269 | return ELIMIT; |
289 | return ELIMIT; |
270 | 290 | ||
271 | call->buffer = (uint8_t *) malloc(size, 0); |
291 | call->buffer = (uint8_t *) malloc(size, 0); |
272 | rc = copy_from_uspace(call->buffer, (void *) src, size); |
292 | rc = copy_from_uspace(call->buffer, (void *) src, size); |
273 | if (rc != 0) { |
293 | if (rc != 0) { |
274 | free(call->buffer); |
294 | free(call->buffer); |
275 | return rc; |
295 | return rc; |
276 | } |
296 | } |
277 | break; |
297 | break; |
278 | default: |
298 | default: |
279 | break; |
299 | break; |
280 | } |
300 | } |
281 | return 0; |
301 | return 0; |
282 | } |
302 | } |
283 | 303 | ||
284 | /******************************************************************************* |
304 | /******************************************************************************* |
285 | * Functions called to process received call/answer before passing it to uspace. |
305 | * Functions called to process received call/answer before passing it to uspace. |
286 | *******************************************************************************/ |
306 | *******************************************************************************/ |
287 | 307 | ||
288 | /** Do basic kernel processing of received call answer. |
308 | /** Do basic kernel processing of received call answer. |
289 | * |
309 | * |
290 | * @param call Call structure with the answer. |
310 | * @param call Call structure with the answer. |
291 | */ |
311 | */ |
292 | static void process_answer(call_t *call) |
312 | static void process_answer(call_t *call) |
293 | { |
313 | { |
294 | if (IPC_GET_RETVAL(call->data) == EHANGUP && |
314 | if (IPC_GET_RETVAL(call->data) == EHANGUP && |
295 | (call->flags & IPC_CALL_FORWARDED)) |
315 | (call->flags & IPC_CALL_FORWARDED)) |
296 | IPC_SET_RETVAL(call->data, EFORWARD); |
316 | IPC_SET_RETVAL(call->data, EFORWARD); |
297 | 317 | ||
298 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
318 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
299 | if (IPC_GET_RETVAL(call->data)) |
319 | if (IPC_GET_RETVAL(call->data)) |
300 | phone_dealloc(call->priv); |
320 | phone_dealloc(call->priv); |
301 | else |
321 | else |
302 | IPC_SET_ARG3(call->data, call->priv); |
322 | IPC_SET_ARG3(call->data, call->priv); |
303 | } |
323 | } |
304 | } |
324 | } |
305 | 325 | ||
306 | /** Do basic kernel processing of received call request. |
326 | /** Do basic kernel processing of received call request. |
307 | * |
327 | * |
308 | * @param box Destination answerbox structure. |
328 | * @param box Destination answerbox structure. |
309 | * @param call Call structure with the request. |
329 | * @param call Call structure with the request. |
310 | * |
330 | * |
311 | * @return Return 0 if the call should be passed to userspace. |
331 | * @return Return 0 if the call should be passed to userspace. |
312 | * Return -1 if the call should be ignored. |
332 | * Return -1 if the call should be ignored. |
313 | */ |
333 | */ |
314 | static int process_request(answerbox_t *box, call_t *call) |
334 | static int process_request(answerbox_t *box, call_t *call) |
315 | { |
335 | { |
316 | int phoneid; |
336 | int phoneid; |
317 | 337 | ||
318 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
338 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
319 | phoneid = phone_alloc(); |
339 | phoneid = phone_alloc(); |
320 | if (phoneid < 0) { /* Failed to allocate phone */ |
340 | if (phoneid < 0) { /* Failed to allocate phone */ |
321 | IPC_SET_RETVAL(call->data, ELIMIT); |
341 | IPC_SET_RETVAL(call->data, ELIMIT); |
322 | ipc_answer(box, call); |
342 | ipc_answer(box, call); |
323 | return -1; |
343 | return -1; |
324 | } |
344 | } |
325 | IPC_SET_ARG3(call->data, phoneid); |
345 | IPC_SET_ARG3(call->data, phoneid); |
326 | } |
346 | } |
327 | return 0; |
347 | return 0; |
328 | } |
348 | } |
329 | 349 | ||
330 | /** Make a fast call over IPC, wait for reply and return to user. |
350 | /** Make a fast call over IPC, wait for reply and return to user. |
331 | * |
351 | * |
332 | * This function can handle only one argument of payload, but is faster than |
352 | * This function can handle only one argument of payload, but is faster than |
333 | * the generic function (i.e. sys_ipc_call_sync()). |
353 | * the generic function (i.e. sys_ipc_call_sync()). |
334 | * |
354 | * |
335 | * @param phoneid Phone handle for the call. |
355 | * @param phoneid Phone handle for the call. |
336 | * @param method Method of the call. |
356 | * @param method Method of the call. |
337 | * @param arg1 Service-defined payload argument. |
357 | * @param arg1 Service-defined payload argument. |
338 | * @param data Address of userspace structure where the reply call will |
358 | * @param data Address of userspace structure where the reply call will |
339 | * be stored. |
359 | * be stored. |
340 | * |
360 | * |
341 | * @return Returns 0 on success. |
361 | * @return Returns 0 on success. |
342 | * Return ENOENT if there is no such phone handle. |
362 | * Return ENOENT if there is no such phone handle. |
343 | */ |
363 | */ |
344 | unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method, |
364 | unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method, |
345 | unative_t arg1, ipc_data_t *data) |
365 | unative_t arg1, ipc_data_t *data) |
346 | { |
366 | { |
347 | call_t call; |
367 | call_t call; |
348 | phone_t *phone; |
368 | phone_t *phone; |
349 | int res; |
369 | int res; |
350 | 370 | ||
351 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
371 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
352 | 372 | ||
353 | ipc_call_static_init(&call); |
373 | ipc_call_static_init(&call); |
354 | IPC_SET_METHOD(call.data, method); |
374 | IPC_SET_METHOD(call.data, method); |
355 | IPC_SET_ARG1(call.data, arg1); |
375 | IPC_SET_ARG1(call.data, arg1); |
356 | 376 | ||
357 | if (!(res = request_preprocess(&call))) { |
377 | if (!(res = request_preprocess(&call))) { |
358 | ipc_call_sync(phone, &call); |
378 | ipc_call_sync(phone, &call); |
359 | process_answer(&call); |
379 | process_answer(&call); |
360 | } else { |
380 | } else { |
361 | IPC_SET_RETVAL(call.data, res); |
381 | IPC_SET_RETVAL(call.data, res); |
362 | } |
382 | } |
363 | STRUCT_TO_USPACE(&data->args, &call.data.args); |
383 | STRUCT_TO_USPACE(&data->args, &call.data.args); |
364 | 384 | ||
365 | return 0; |
385 | return 0; |
366 | } |
386 | } |
367 | 387 | ||
368 | /** Make a synchronous IPC call allowing to transmit the entire payload. |
388 | /** Make a synchronous IPC call allowing to transmit the entire payload. |
369 | * |
389 | * |
370 | * @param phoneid Phone handle for the call. |
390 | * @param phoneid Phone handle for the call. |
371 | * @param question Userspace address of call data with the request. |
391 | * @param question Userspace address of call data with the request. |
372 | * @param reply Userspace address of call data where to store the |
392 | * @param reply Userspace address of call data where to store the |
373 | * answer. |
393 | * answer. |
374 | * |
394 | * |
375 | * @return Zero on success or an error code. |
395 | * @return Zero on success or an error code. |
376 | */ |
396 | */ |
377 | unative_t sys_ipc_call_sync(unative_t phoneid, ipc_data_t *question, |
397 | unative_t sys_ipc_call_sync(unative_t phoneid, ipc_data_t *question, |
378 | ipc_data_t *reply) |
398 | ipc_data_t *reply) |
379 | { |
399 | { |
380 | call_t call; |
400 | call_t call; |
381 | phone_t *phone; |
401 | phone_t *phone; |
382 | int res; |
402 | int res; |
383 | int rc; |
403 | int rc; |
384 | 404 | ||
385 | ipc_call_static_init(&call); |
405 | ipc_call_static_init(&call); |
386 | rc = copy_from_uspace(&call.data.args, &question->args, |
406 | rc = copy_from_uspace(&call.data.args, &question->args, |
387 | sizeof(call.data.args)); |
407 | sizeof(call.data.args)); |
388 | if (rc != 0) |
408 | if (rc != 0) |
389 | return (unative_t) rc; |
409 | return (unative_t) rc; |
390 | 410 | ||
391 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
411 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
392 | 412 | ||
393 | if (!(res = request_preprocess(&call))) { |
413 | if (!(res = request_preprocess(&call))) { |
394 | ipc_call_sync(phone, &call); |
414 | ipc_call_sync(phone, &call); |
395 | process_answer(&call); |
415 | process_answer(&call); |
396 | } else |
416 | } else |
397 | IPC_SET_RETVAL(call.data, res); |
417 | IPC_SET_RETVAL(call.data, res); |
398 | 418 | ||
399 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
419 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
400 | if (rc != 0) |
420 | if (rc != 0) |
401 | return rc; |
421 | return rc; |
402 | 422 | ||
403 | return 0; |
423 | return 0; |
404 | } |
424 | } |
405 | 425 | ||
406 | /** Check that the task did not exceed the allowed limit of asynchronous calls. |
426 | /** Check that the task did not exceed the allowed limit of asynchronous calls. |
407 | * |
427 | * |
408 | * @return Return 0 if limit not reached or -1 if limit exceeded. |
428 | * @return Return 0 if limit not reached or -1 if limit exceeded. |
409 | */ |
429 | */ |
410 | static int check_call_limit(void) |
430 | static int check_call_limit(void) |
411 | { |
431 | { |
412 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
432 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
413 | atomic_dec(&TASK->active_calls); |
433 | atomic_dec(&TASK->active_calls); |
414 | return -1; |
434 | return -1; |
415 | } |
435 | } |
416 | return 0; |
436 | return 0; |
417 | } |
437 | } |
418 | 438 | ||
419 | /** Make a fast asynchronous call over IPC. |
439 | /** Make a fast asynchronous call over IPC. |
420 | * |
440 | * |
421 | * This function can only handle two arguments of payload, but is faster than |
441 | * This function can only handle two arguments of payload, but is faster than |
422 | * the generic function sys_ipc_call_async(). |
442 | * the generic function sys_ipc_call_async(). |
423 | * |
443 | * |
424 | * @param phoneid Phone handle for the call. |
444 | * @param phoneid Phone handle for the call. |
425 | * @param method Method of the call. |
445 | * @param method Method of the call. |
426 | * @param arg1 Service-defined payload argument. |
446 | * @param arg1 Service-defined payload argument. |
427 | * @param arg2 Service-defined payload argument. |
447 | * @param arg2 Service-defined payload argument. |
428 | * |
448 | * |
429 | * @return Return call hash on success. |
449 | * @return Return call hash on success. |
430 | * Return IPC_CALLRET_FATAL in case of a fatal error and |
450 | * Return IPC_CALLRET_FATAL in case of a fatal error and |
431 | * IPC_CALLRET_TEMPORARY if there are too many pending |
451 | * IPC_CALLRET_TEMPORARY if there are too many pending |
432 | * asynchronous requests; answers should be handled first. |
452 | * asynchronous requests; answers should be handled first. |
433 | */ |
453 | */ |
434 | unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method, |
454 | unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method, |
435 | unative_t arg1, unative_t arg2) |
455 | unative_t arg1, unative_t arg2) |
436 | { |
456 | { |
437 | call_t *call; |
457 | call_t *call; |
438 | phone_t *phone; |
458 | phone_t *phone; |
439 | int res; |
459 | int res; |
440 | 460 | ||
441 | if (check_call_limit()) |
461 | if (check_call_limit()) |
442 | return IPC_CALLRET_TEMPORARY; |
462 | return IPC_CALLRET_TEMPORARY; |
443 | 463 | ||
444 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
464 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
445 | 465 | ||
446 | call = ipc_call_alloc(0); |
466 | call = ipc_call_alloc(0); |
447 | IPC_SET_METHOD(call->data, method); |
467 | IPC_SET_METHOD(call->data, method); |
448 | IPC_SET_ARG1(call->data, arg1); |
468 | IPC_SET_ARG1(call->data, arg1); |
449 | IPC_SET_ARG2(call->data, arg2); |
469 | IPC_SET_ARG2(call->data, arg2); |
450 | IPC_SET_ARG3(call->data, 0); |
470 | IPC_SET_ARG3(call->data, 0); |
451 | 471 | ||
452 | if (!(res = request_preprocess(call))) |
472 | if (!(res = request_preprocess(call))) |
453 | ipc_call(phone, call); |
473 | ipc_call(phone, call); |
454 | else |
474 | else |
455 | ipc_backsend_err(phone, call, res); |
475 | ipc_backsend_err(phone, call, res); |
456 | 476 | ||
457 | return (unative_t) call; |
477 | return (unative_t) call; |
458 | } |
478 | } |
459 | 479 | ||
460 | /** Make an asynchronous IPC call allowing to transmit the entire payload. |
480 | /** Make an asynchronous IPC call allowing to transmit the entire payload. |
461 | * |
481 | * |
462 | * @param phoneid Phone handle for the call. |
482 | * @param phoneid Phone handle for the call. |
463 | * @param data Userspace address of call data with the request. |
483 | * @param data Userspace address of call data with the request. |
464 | * |
484 | * |
465 | * @return See sys_ipc_call_async_fast(). |
485 | * @return See sys_ipc_call_async_fast(). |
466 | */ |
486 | */ |
467 | unative_t sys_ipc_call_async(unative_t phoneid, ipc_data_t *data) |
487 | unative_t sys_ipc_call_async(unative_t phoneid, ipc_data_t *data) |
468 | { |
488 | { |
469 | call_t *call; |
489 | call_t *call; |
470 | phone_t *phone; |
490 | phone_t *phone; |
471 | int res; |
491 | int res; |
472 | int rc; |
492 | int rc; |
473 | 493 | ||
474 | if (check_call_limit()) |
494 | if (check_call_limit()) |
475 | return IPC_CALLRET_TEMPORARY; |
495 | return IPC_CALLRET_TEMPORARY; |
476 | 496 | ||
477 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
497 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
478 | 498 | ||
479 | call = ipc_call_alloc(0); |
499 | call = ipc_call_alloc(0); |
480 | rc = copy_from_uspace(&call->data.args, &data->args, |
500 | rc = copy_from_uspace(&call->data.args, &data->args, |
481 | sizeof(call->data.args)); |
501 | sizeof(call->data.args)); |
482 | if (rc != 0) { |
502 | if (rc != 0) { |
483 | ipc_call_free(call); |
503 | ipc_call_free(call); |
484 | return (unative_t) rc; |
504 | return (unative_t) rc; |
485 | } |
505 | } |
486 | if (!(res = request_preprocess(call))) |
506 | if (!(res = request_preprocess(call))) |
487 | ipc_call(phone, call); |
507 | ipc_call(phone, call); |
488 | else |
508 | else |
489 | ipc_backsend_err(phone, call, res); |
509 | ipc_backsend_err(phone, call, res); |
490 | 510 | ||
491 | return (unative_t) call; |
511 | return (unative_t) call; |
492 | } |
512 | } |
493 | 513 | ||
494 | /** Forward a received call to another destination. |
514 | /** Forward a received call to another destination. |
495 | * |
515 | * |
496 | * @param callid Hash of the call to forward. |
516 | * @param callid Hash of the call to forward. |
497 | * @param phoneid Phone handle to use for forwarding. |
517 | * @param phoneid Phone handle to use for forwarding. |
498 | * @param method New method to use for the forwarded call. |
518 | * @param method New method to use for the forwarded call. |
499 | * @param arg1 New value of the first argument for the forwarded call. |
519 | * @param arg1 New value of the first argument for the forwarded call. |
500 | * |
520 | * |
501 | * @return Return 0 on succes, otherwise return an error code. |
521 | * @return Return 0 on succes, otherwise return an error code. |
502 | * |
522 | * |
503 | * In case the original method is a system method, ARG1 and ARG2 are overwritten |
523 | * In case the original method is a system method, ARG1 and ARG2 are overwritten |
504 | * in the forwarded message with the new method and the new arg1, respectively. |
524 | * in the forwarded message with the new method and the new arg1, respectively. |
505 | * Otherwise the METHOD and ARG1 are rewritten with the new method and arg1, |
525 | * Otherwise the METHOD and ARG1 are rewritten with the new method and arg1, |
506 | * respectively. |
526 | * respectively. Also note there is a set of immutable methods, for which the |
- | 527 | * new method and argument is not set and these values are ignored. |
|
507 | * |
528 | * |
508 | * Warning: If implementing non-fast version, make sure that |
529 | * Warning: If implementing non-fast version, make sure that |
509 | * ARG3 is not rewritten for certain system IPC |
530 | * ARG3 is not rewritten for certain system IPC |
510 | */ |
531 | */ |
511 | unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid, |
532 | unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid, |
512 | unative_t method, unative_t arg1) |
533 | unative_t method, unative_t arg1) |
513 | { |
534 | { |
514 | call_t *call; |
535 | call_t *call; |
515 | phone_t *phone; |
536 | phone_t *phone; |
516 | 537 | ||
517 | call = get_call(callid); |
538 | call = get_call(callid); |
518 | if (!call) |
539 | if (!call) |
519 | return ENOENT; |
540 | return ENOENT; |
520 | 541 | ||
521 | call->flags |= IPC_CALL_FORWARDED; |
542 | call->flags |= IPC_CALL_FORWARDED; |
522 | 543 | ||
523 | GET_CHECK_PHONE(phone, phoneid, { |
544 | GET_CHECK_PHONE(phone, phoneid, { |
524 | IPC_SET_RETVAL(call->data, EFORWARD); |
545 | IPC_SET_RETVAL(call->data, EFORWARD); |
525 | ipc_answer(&TASK->answerbox, call); |
546 | ipc_answer(&TASK->answerbox, call); |
526 | return ENOENT; |
547 | return ENOENT; |
527 | }); |
548 | }); |
528 | 549 | ||
529 | if (!is_forwardable(IPC_GET_METHOD(call->data))) { |
550 | if (!method_is_forwardable(IPC_GET_METHOD(call->data))) { |
530 | IPC_SET_RETVAL(call->data, EFORWARD); |
551 | IPC_SET_RETVAL(call->data, EFORWARD); |
531 | ipc_answer(&TASK->answerbox, call); |
552 | ipc_answer(&TASK->answerbox, call); |
532 | return EPERM; |
553 | return EPERM; |
533 | } |
554 | } |
534 | 555 | ||
- | 556 | /* |
|
535 | /* Userspace is not allowed to change method of system methods |
557 | * Userspace is not allowed to change method of system methods on |
536 | * on forward, allow changing ARG1 and ARG2 by means of method and arg1 |
558 | * forward, allow changing ARG1 and ARG2 by means of method and arg1. |
- | 559 | * If the method is immutable, don't change anything. |
|
537 | */ |
560 | */ |
- | 561 | if (!method_is_immutable(IPC_GET_METHOD(call->data))) { |
|
538 | if (is_system_method(IPC_GET_METHOD(call->data))) { |
562 | if (method_is_system(IPC_GET_METHOD(call->data))) { |
539 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
563 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
540 | phone_dealloc(IPC_GET_ARG3(call->data)); |
564 | phone_dealloc(IPC_GET_ARG3(call->data)); |
541 | 565 | ||
542 | IPC_SET_ARG1(call->data, method); |
566 | IPC_SET_ARG1(call->data, method); |
543 | IPC_SET_ARG2(call->data, arg1); |
567 | IPC_SET_ARG2(call->data, arg1); |
544 | } else { |
568 | } else { |
545 | IPC_SET_METHOD(call->data, method); |
569 | IPC_SET_METHOD(call->data, method); |
546 | IPC_SET_ARG1(call->data, arg1); |
570 | IPC_SET_ARG1(call->data, arg1); |
- | 571 | } |
|
547 | } |
572 | } |
548 | 573 | ||
549 | return ipc_forward(call, phone, &TASK->answerbox); |
574 | return ipc_forward(call, phone, &TASK->answerbox); |
550 | } |
575 | } |
551 | 576 | ||
552 | /** Answer an IPC call - fast version. |
577 | /** Answer an IPC call - fast version. |
553 | * |
578 | * |
554 | * This function can handle only two return arguments of payload, but is faster |
579 | * This function can handle only two return arguments of payload, but is faster |
555 | * than the generic sys_ipc_answer(). |
580 | * than the generic sys_ipc_answer(). |
556 | * |
581 | * |
557 | * @param callid Hash of the call to be answered. |
582 | * @param callid Hash of the call to be answered. |
558 | * @param retval Return value of the answer. |
583 | * @param retval Return value of the answer. |
559 | * @param arg1 Service-defined return value. |
584 | * @param arg1 Service-defined return value. |
560 | * @param arg2 Service-defined return value. |
585 | * @param arg2 Service-defined return value. |
561 | * |
586 | * |
562 | * @return Return 0 on success, otherwise return an error code. |
587 | * @return Return 0 on success, otherwise return an error code. |
563 | */ |
588 | */ |
564 | unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, |
589 | unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, |
565 | unative_t arg1, unative_t arg2) |
590 | unative_t arg1, unative_t arg2) |
566 | { |
591 | { |
567 | call_t *call; |
592 | call_t *call; |
568 | ipc_data_t saved_data; |
593 | ipc_data_t saved_data; |
569 | int saveddata = 0; |
594 | int saveddata = 0; |
570 | int rc; |
595 | int rc; |
571 | 596 | ||
572 | /* Do not answer notification callids */ |
597 | /* Do not answer notification callids */ |
573 | if (callid & IPC_CALLID_NOTIFICATION) |
598 | if (callid & IPC_CALLID_NOTIFICATION) |
574 | return 0; |
599 | return 0; |
575 | 600 | ||
576 | call = get_call(callid); |
601 | call = get_call(callid); |
577 | if (!call) |
602 | if (!call) |
578 | return ENOENT; |
603 | return ENOENT; |
579 | 604 | ||
580 | if (answer_need_old(call)) { |
605 | if (answer_need_old(call)) { |
581 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
606 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
582 | saveddata = 1; |
607 | saveddata = 1; |
583 | } |
608 | } |
584 | 609 | ||
585 | IPC_SET_RETVAL(call->data, retval); |
610 | IPC_SET_RETVAL(call->data, retval); |
586 | IPC_SET_ARG1(call->data, arg1); |
611 | IPC_SET_ARG1(call->data, arg1); |
587 | IPC_SET_ARG2(call->data, arg2); |
612 | IPC_SET_ARG2(call->data, arg2); |
588 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
613 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
589 | 614 | ||
590 | ipc_answer(&TASK->answerbox, call); |
615 | ipc_answer(&TASK->answerbox, call); |
591 | return rc; |
616 | return rc; |
592 | } |
617 | } |
593 | 618 | ||
594 | /** Answer an IPC call. |
619 | /** Answer an IPC call. |
595 | * |
620 | * |
596 | * @param callid Hash of the call to be answered. |
621 | * @param callid Hash of the call to be answered. |
597 | * @param data Userspace address of call data with the answer. |
622 | * @param data Userspace address of call data with the answer. |
598 | * |
623 | * |
599 | * @return Return 0 on success, otherwise return an error code. |
624 | * @return Return 0 on success, otherwise return an error code. |
600 | */ |
625 | */ |
601 | unative_t sys_ipc_answer(unative_t callid, ipc_data_t *data) |
626 | unative_t sys_ipc_answer(unative_t callid, ipc_data_t *data) |
602 | { |
627 | { |
603 | call_t *call; |
628 | call_t *call; |
604 | ipc_data_t saved_data; |
629 | ipc_data_t saved_data; |
605 | int saveddata = 0; |
630 | int saveddata = 0; |
606 | int rc; |
631 | int rc; |
607 | 632 | ||
608 | /* Do not answer notification callids */ |
633 | /* Do not answer notification callids */ |
609 | if (callid & IPC_CALLID_NOTIFICATION) |
634 | if (callid & IPC_CALLID_NOTIFICATION) |
610 | return 0; |
635 | return 0; |
611 | 636 | ||
612 | call = get_call(callid); |
637 | call = get_call(callid); |
613 | if (!call) |
638 | if (!call) |
614 | return ENOENT; |
639 | return ENOENT; |
615 | 640 | ||
616 | if (answer_need_old(call)) { |
641 | if (answer_need_old(call)) { |
617 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
642 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
618 | saveddata = 1; |
643 | saveddata = 1; |
619 | } |
644 | } |
620 | rc = copy_from_uspace(&call->data.args, &data->args, |
645 | rc = copy_from_uspace(&call->data.args, &data->args, |
621 | sizeof(call->data.args)); |
646 | sizeof(call->data.args)); |
622 | if (rc != 0) |
647 | if (rc != 0) |
623 | return rc; |
648 | return rc; |
624 | 649 | ||
625 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
650 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
626 | 651 | ||
627 | ipc_answer(&TASK->answerbox, call); |
652 | ipc_answer(&TASK->answerbox, call); |
628 | 653 | ||
629 | return rc; |
654 | return rc; |
630 | } |
655 | } |
631 | 656 | ||
632 | /** Hang up a phone. |
657 | /** Hang up a phone. |
633 | * |
658 | * |
634 | * @param Phone handle of the phone to be hung up. |
659 | * @param Phone handle of the phone to be hung up. |
635 | * |
660 | * |
636 | * @return Return 0 on success or an error code. |
661 | * @return Return 0 on success or an error code. |
637 | */ |
662 | */ |
638 | unative_t sys_ipc_hangup(int phoneid) |
663 | unative_t sys_ipc_hangup(int phoneid) |
639 | { |
664 | { |
640 | phone_t *phone; |
665 | phone_t *phone; |
641 | 666 | ||
642 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
667 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
643 | 668 | ||
644 | if (ipc_phone_hangup(phone)) |
669 | if (ipc_phone_hangup(phone)) |
645 | return -1; |
670 | return -1; |
646 | 671 | ||
647 | return 0; |
672 | return 0; |
648 | } |
673 | } |
649 | 674 | ||
650 | /** Wait for an incoming IPC call or an answer. |
675 | /** Wait for an incoming IPC call or an answer. |
651 | * |
676 | * |
652 | * @param calldata Pointer to buffer where the call/answer data is stored. |
677 | * @param calldata Pointer to buffer where the call/answer data is stored. |
653 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
678 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
654 | * @param flags Select mode of sleep operation. See waitq_sleep_timeout() |
679 | * @param flags Select mode of sleep operation. See waitq_sleep_timeout() |
655 | * for explanation. |
680 | * for explanation. |
656 | * |
681 | * |
657 | * @return Hash of the call. |
682 | * @return Hash of the call. |
658 | * If IPC_CALLID_NOTIFICATION bit is set in the hash, the |
683 | * If IPC_CALLID_NOTIFICATION bit is set in the hash, the |
659 | * call is a notification. IPC_CALLID_ANSWERED denotes an |
684 | * call is a notification. IPC_CALLID_ANSWERED denotes an |
660 | * answer. |
685 | * answer. |
661 | */ |
686 | */ |
662 | unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags) |
687 | unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags) |
663 | { |
688 | { |
664 | call_t *call; |
689 | call_t *call; |
665 | 690 | ||
666 | restart: |
691 | restart: |
667 | call = ipc_wait_for_call(&TASK->answerbox, usec, |
692 | call = ipc_wait_for_call(&TASK->answerbox, usec, |
668 | flags | SYNCH_FLAGS_INTERRUPTIBLE); |
693 | flags | SYNCH_FLAGS_INTERRUPTIBLE); |
669 | if (!call) |
694 | if (!call) |
670 | return 0; |
695 | return 0; |
671 | 696 | ||
672 | if (call->flags & IPC_CALL_NOTIF) { |
697 | if (call->flags & IPC_CALL_NOTIF) { |
673 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
698 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
674 | 699 | ||
675 | /* Set in_phone_hash to the interrupt counter */ |
700 | /* Set in_phone_hash to the interrupt counter */ |
676 | call->data.phone = (void *) call->priv; |
701 | call->data.phone = (void *) call->priv; |
677 | 702 | ||
678 | STRUCT_TO_USPACE(calldata, &call->data); |
703 | STRUCT_TO_USPACE(calldata, &call->data); |
679 | 704 | ||
680 | ipc_call_free(call); |
705 | ipc_call_free(call); |
681 | 706 | ||
682 | return ((unative_t) call) | IPC_CALLID_NOTIFICATION; |
707 | return ((unative_t) call) | IPC_CALLID_NOTIFICATION; |
683 | } |
708 | } |
684 | 709 | ||
685 | if (call->flags & IPC_CALL_ANSWERED) { |
710 | if (call->flags & IPC_CALL_ANSWERED) { |
686 | process_answer(call); |
711 | process_answer(call); |
687 | 712 | ||
688 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
713 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
689 | 714 | ||
690 | atomic_dec(&TASK->active_calls); |
715 | atomic_dec(&TASK->active_calls); |
691 | 716 | ||
692 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
717 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
693 | ipc_call_free(call); |
718 | ipc_call_free(call); |
694 | goto restart; |
719 | goto restart; |
695 | } |
720 | } |
696 | 721 | ||
697 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
722 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
698 | ipc_call_free(call); |
723 | ipc_call_free(call); |
699 | 724 | ||
700 | return ((unative_t) call) | IPC_CALLID_ANSWERED; |
725 | return ((unative_t) call) | IPC_CALLID_ANSWERED; |
701 | } |
726 | } |
702 | 727 | ||
703 | if (process_request(&TASK->answerbox, call)) |
728 | if (process_request(&TASK->answerbox, call)) |
704 | goto restart; |
729 | goto restart; |
705 | 730 | ||
706 | /* Include phone address('id') of the caller in the request, |
731 | /* Include phone address('id') of the caller in the request, |
707 | * copy whole call->data, not only call->data.args */ |
732 | * copy whole call->data, not only call->data.args */ |
708 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
733 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
709 | return 0; |
734 | return 0; |
710 | } |
735 | } |
711 | return (unative_t)call; |
736 | return (unative_t)call; |
712 | } |
737 | } |
713 | 738 | ||
714 | /** Connect an IRQ handler to a task. |
739 | /** Connect an IRQ handler to a task. |
715 | * |
740 | * |
716 | * @param inr IRQ number. |
741 | * @param inr IRQ number. |
717 | * @param devno Device number. |
742 | * @param devno Device number. |
718 | * @param method Method to be associated with the notification. |
743 | * @param method Method to be associated with the notification. |
719 | * @param ucode Uspace pointer to the top-half pseudocode. |
744 | * @param ucode Uspace pointer to the top-half pseudocode. |
720 | * |
745 | * |
721 | * @return EPERM or a return code returned by ipc_irq_register(). |
746 | * @return EPERM or a return code returned by ipc_irq_register(). |
722 | */ |
747 | */ |
723 | unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method, |
748 | unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method, |
724 | irq_code_t *ucode) |
749 | irq_code_t *ucode) |
725 | { |
750 | { |
726 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
751 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
727 | return EPERM; |
752 | return EPERM; |
728 | 753 | ||
729 | return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode); |
754 | return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode); |
730 | } |
755 | } |
731 | 756 | ||
732 | /** Disconnect an IRQ handler from a task. |
757 | /** Disconnect an IRQ handler from a task. |
733 | * |
758 | * |
734 | * @param inr IRQ number. |
759 | * @param inr IRQ number. |
735 | * @param devno Device number. |
760 | * @param devno Device number. |
736 | * |
761 | * |
737 | * @return Zero on success or EPERM on error.. |
762 | * @return Zero on success or EPERM on error.. |
738 | */ |
763 | */ |
739 | unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno) |
764 | unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno) |
740 | { |
765 | { |
741 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
766 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
742 | return EPERM; |
767 | return EPERM; |
743 | 768 | ||
744 | ipc_irq_unregister(&TASK->answerbox, inr, devno); |
769 | ipc_irq_unregister(&TASK->answerbox, inr, devno); |
745 | 770 | ||
746 | return 0; |
771 | return 0; |
747 | } |
772 | } |
748 | 773 | ||
749 | /** @} |
774 | /** @} |
750 | */ |
775 | */ |
751 | 776 |