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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 | #include <arch.h> |
29 | #include <arch.h> |
30 | #include <proc/task.h> |
30 | #include <proc/task.h> |
31 | #include <proc/thread.h> |
31 | #include <proc/thread.h> |
32 | #include <errno.h> |
32 | #include <errno.h> |
33 | #include <memstr.h> |
33 | #include <memstr.h> |
34 | #include <debug.h> |
34 | #include <debug.h> |
35 | #include <ipc/ipc.h> |
35 | #include <ipc/ipc.h> |
36 | #include <ipc/sysipc.h> |
36 | #include <ipc/sysipc.h> |
37 | #include <ipc/irq.h> |
37 | #include <ipc/irq.h> |
38 | #include <ipc/ipcrsc.h> |
38 | #include <ipc/ipcrsc.h> |
39 | #include <arch/interrupt.h> |
39 | #include <arch/interrupt.h> |
40 | #include <print.h> |
40 | #include <print.h> |
41 | #include <syscall/copy.h> |
41 | #include <syscall/copy.h> |
42 | #include <security/cap.h> |
42 | #include <security/cap.h> |
43 | #include <mm/as.h> |
43 | #include <mm/as.h> |
44 | 44 | ||
45 | #define GET_CHECK_PHONE(phone,phoneid,err) { \ |
45 | #define GET_CHECK_PHONE(phone,phoneid,err) { \ |
46 | if (phoneid > IPC_MAX_PHONES) { err; } \ |
46 | if (phoneid > IPC_MAX_PHONES) { err; } \ |
47 | phone = &TASK->phones[phoneid]; \ |
47 | phone = &TASK->phones[phoneid]; \ |
48 | } |
48 | } |
49 | 49 | ||
50 | #define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src))) |
50 | #define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src))) |
51 | 51 | ||
52 | /** Return true if the method is a system method */ |
52 | /** Return true if the method is a system method */ |
53 | static inline int is_system_method(__native method) |
53 | static inline int is_system_method(__native method) |
54 | { |
54 | { |
55 | if (method <= IPC_M_LAST_SYSTEM) |
55 | if (method <= IPC_M_LAST_SYSTEM) |
56 | return 1; |
56 | return 1; |
57 | return 0; |
57 | return 0; |
58 | } |
58 | } |
59 | 59 | ||
60 | /** Return true if the message with this method is forwardable |
60 | /** Return true if the message with this method is forwardable |
61 | * |
61 | * |
62 | * - some system messages may be forwarded, for some of them |
62 | * - some system messages may be forwarded, for some of them |
63 | * it is useless |
63 | * it is useless |
64 | */ |
64 | */ |
65 | static inline int is_forwardable(__native method) |
65 | static inline int is_forwardable(__native method) |
66 | { |
66 | { |
67 | if (method == IPC_M_PHONE_HUNGUP || method == IPC_M_AS_AREA_SEND) |
67 | if (method == IPC_M_PHONE_HUNGUP || method == IPC_M_AS_AREA_SEND \ |
- | 68 | || method == IPC_M_AS_AREA_RECV) |
|
68 | return 0; /* This message is meant only for the receiver */ |
69 | return 0; /* This message is meant only for the receiver */ |
69 | return 1; |
70 | return 1; |
70 | } |
71 | } |
71 | 72 | ||
72 | /****************************************************/ |
73 | /****************************************************/ |
73 | /* Functions that preprocess answer before sending |
74 | /* Functions that preprocess answer before sending |
74 | * it to the recepient |
75 | * it to the recepient |
75 | */ |
76 | */ |
76 | 77 | ||
77 | /** Return true if the caller (ipc_answer) should save |
78 | /** Return true if the caller (ipc_answer) should save |
78 | * the old call contents for answer_preprocess |
79 | * the old call contents for answer_preprocess |
79 | */ |
80 | */ |
80 | static inline int answer_need_old(call_t *call) |
81 | static inline int answer_need_old(call_t *call) |
81 | { |
82 | { |
82 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
83 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
83 | return 1; |
84 | return 1; |
84 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO) |
85 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO) |
85 | return 1; |
86 | return 1; |
86 | if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND) |
87 | if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND) |
87 | return 1; |
88 | return 1; |
- | 89 | if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_RECV) |
|
- | 90 | return 1; |
|
88 | return 0; |
91 | return 0; |
89 | } |
92 | } |
90 | 93 | ||
91 | /** Interpret process answer as control information */ |
94 | /** Interpret process answer as control information |
- | 95 | * |
|
- | 96 | * This function is called directly after sys_ipc_answer |
|
- | 97 | */ |
|
92 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
98 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
93 | { |
99 | { |
94 | int phoneid; |
100 | int phoneid; |
95 | 101 | ||
96 | if (IPC_GET_RETVAL(answer->data) == EHANGUP) { |
102 | if (IPC_GET_RETVAL(answer->data) == EHANGUP) { |
97 | /* In case of forward, hangup the forwared phone, |
103 | /* In case of forward, hangup the forwared phone, |
98 | * not the originator |
104 | * not the originator |
99 | */ |
105 | */ |
100 | spinlock_lock(&answer->data.phone->lock); |
106 | spinlock_lock(&answer->data.phone->lock); |
101 | spinlock_lock(&TASK->answerbox.lock); |
107 | spinlock_lock(&TASK->answerbox.lock); |
102 | if (answer->data.phone->callee) { |
108 | if (answer->data.phone->callee) { |
103 | list_remove(&answer->data.phone->list); |
109 | list_remove(&answer->data.phone->list); |
104 | answer->data.phone->callee = 0; |
110 | answer->data.phone->callee = 0; |
105 | } |
111 | } |
106 | spinlock_unlock(&TASK->answerbox.lock); |
112 | spinlock_unlock(&TASK->answerbox.lock); |
107 | spinlock_unlock(&answer->data.phone->lock); |
113 | spinlock_unlock(&answer->data.phone->lock); |
108 | } |
114 | } |
109 | 115 | ||
110 | if (!olddata) |
116 | if (!olddata) |
111 | return 0; |
117 | return 0; |
112 | 118 | ||
113 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
119 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
114 | phoneid = IPC_GET_ARG3(*olddata); |
120 | phoneid = IPC_GET_ARG3(*olddata); |
115 | if (IPC_GET_RETVAL(answer->data)) { |
121 | if (IPC_GET_RETVAL(answer->data)) { |
116 | /* The connection was not accepted */ |
122 | /* The connection was not accepted */ |
117 | phone_dealloc(phoneid); |
123 | phone_dealloc(phoneid); |
118 | } else { |
124 | } else { |
119 | /* The connection was accepted */ |
125 | /* The connection was accepted */ |
120 | phone_connect(phoneid,&answer->sender->answerbox); |
126 | phone_connect(phoneid,&answer->sender->answerbox); |
121 | /* Set 'phone identification' as arg3 of response */ |
127 | /* Set 'phone identification' as arg3 of response */ |
122 | IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]); |
128 | IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]); |
123 | } |
129 | } |
124 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
130 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
125 | /* If the users accepted call, connect */ |
131 | /* If the users accepted call, connect */ |
126 | if (!IPC_GET_RETVAL(answer->data)) { |
132 | if (!IPC_GET_RETVAL(answer->data)) { |
127 | ipc_phone_connect((phone_t *)IPC_GET_ARG3(*olddata), |
133 | ipc_phone_connect((phone_t *)IPC_GET_ARG3(*olddata), |
128 | &TASK->answerbox); |
134 | &TASK->answerbox); |
129 | } |
135 | } |
130 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) { |
136 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) { |
131 | if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */ |
137 | if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */ |
132 | ipl_t ipl; |
138 | ipl_t ipl; |
133 | as_t *as; |
139 | as_t *as; |
134 | 140 | ||
135 | ipl = interrupts_disable(); |
141 | ipl = interrupts_disable(); |
136 | spinlock_lock(&answer->sender->lock); |
142 | spinlock_lock(&answer->sender->lock); |
137 | as = answer->sender->as; |
143 | as = answer->sender->as; |
138 | spinlock_unlock(&answer->sender->lock); |
144 | spinlock_unlock(&answer->sender->lock); |
139 | interrupts_restore(ipl); |
145 | interrupts_restore(ipl); |
140 | 146 | ||
141 | return as_area_share(as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(*olddata), |
147 | return as_area_share(as, IPC_GET_ARG1(*olddata), IPC_GET_ARG2(*olddata), |
142 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
148 | AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
- | 149 | } |
|
- | 150 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) { |
|
- | 151 | if (!IPC_GET_RETVAL(answer->data)) { |
|
- | 152 | ipl_t ipl; |
|
- | 153 | as_t *as; |
|
- | 154 | ||
- | 155 | ipl = interrupts_disable(); |
|
- | 156 | spinlock_lock(&answer->sender->lock); |
|
- | 157 | as = answer->sender->as; |
|
- | 158 | spinlock_unlock(&answer->sender->lock); |
|
- | 159 | interrupts_restore(ipl); |
|
- | 160 | ||
- | 161 | return as_area_share(AS, IPC_GET_ARG1(answer->data), IPC_GET_ARG2(*olddata), |
|
- | 162 | as, IPC_GET_ARG1(*olddata), IPC_GET_ARG3(*olddata)); |
|
143 | } |
163 | } |
144 | } |
164 | } |
145 | return 0; |
165 | return 0; |
146 | } |
166 | } |
147 | 167 | ||
148 | /** Called before the request is sent |
168 | /** Called before the request is sent |
149 | * |
169 | * |
150 | * @return 0 - no error, -1 - report error to user |
170 | * @return 0 - no error, -1 - report error to user |
151 | */ |
171 | */ |
152 | static int request_preprocess(call_t *call) |
172 | static int request_preprocess(call_t *call) |
153 | { |
173 | { |
154 | int newphid; |
174 | int newphid; |
155 | size_t size; |
175 | size_t size; |
156 | 176 | ||
157 | switch (IPC_GET_METHOD(call->data)) { |
177 | switch (IPC_GET_METHOD(call->data)) { |
158 | case IPC_M_CONNECT_ME_TO: |
178 | case IPC_M_CONNECT_ME_TO: |
159 | newphid = phone_alloc(); |
179 | newphid = phone_alloc(); |
160 | if (newphid < 0) |
180 | if (newphid < 0) |
161 | return ELIMIT; |
181 | return ELIMIT; |
162 | /* Set arg3 for server */ |
182 | /* Set arg3 for server */ |
163 | IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]); |
183 | IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]); |
164 | call->flags |= IPC_CALL_CONN_ME_TO; |
184 | call->flags |= IPC_CALL_CONN_ME_TO; |
165 | call->private = newphid; |
185 | call->private = newphid; |
166 | break; |
186 | break; |
167 | case IPC_M_AS_AREA_SEND: |
187 | case IPC_M_AS_AREA_SEND: |
168 | size = as_get_size(IPC_GET_ARG1(call->data)); |
188 | size = as_get_size(IPC_GET_ARG1(call->data)); |
169 | if (!size) { |
189 | if (!size) { |
170 | return EPERM; |
190 | return EPERM; |
171 | } |
191 | } |
172 | IPC_SET_ARG2(call->data, size); |
192 | IPC_SET_ARG2(call->data, size); |
173 | break; |
193 | break; |
174 | default: |
194 | default: |
175 | break; |
195 | break; |
176 | } |
196 | } |
177 | return 0; |
197 | return 0; |
178 | } |
198 | } |
179 | 199 | ||
180 | /****************************************************/ |
200 | /****************************************************/ |
181 | /* Functions called to process received call/answer |
201 | /* Functions called to process received call/answer |
182 | * before passing to uspace |
202 | * before passing to uspace |
183 | */ |
203 | */ |
184 | 204 | ||
185 | /** Do basic kernel processing of received call answer */ |
205 | /** Do basic kernel processing of received call answer */ |
186 | static void process_answer(call_t *call) |
206 | static void process_answer(call_t *call) |
187 | { |
207 | { |
188 | if (IPC_GET_RETVAL(call->data) == EHANGUP && \ |
208 | if (IPC_GET_RETVAL(call->data) == EHANGUP && \ |
189 | call->flags & IPC_CALL_FORWARDED) |
209 | call->flags & IPC_CALL_FORWARDED) |
190 | IPC_SET_RETVAL(call->data, EFORWARD); |
210 | IPC_SET_RETVAL(call->data, EFORWARD); |
191 | 211 | ||
192 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
212 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
193 | if (IPC_GET_RETVAL(call->data)) |
213 | if (IPC_GET_RETVAL(call->data)) |
194 | phone_dealloc(call->private); |
214 | phone_dealloc(call->private); |
195 | else |
215 | else |
196 | IPC_SET_ARG3(call->data, call->private); |
216 | IPC_SET_ARG3(call->data, call->private); |
197 | } |
217 | } |
198 | } |
218 | } |
199 | 219 | ||
200 | /** Do basic kernel processing of received call request |
220 | /** Do basic kernel processing of received call request |
201 | * |
221 | * |
202 | * @return 0 - the call should be passed to userspace, 1 - ignore call |
222 | * @return 0 - the call should be passed to userspace, 1 - ignore call |
203 | */ |
223 | */ |
204 | static int process_request(answerbox_t *box,call_t *call) |
224 | static int process_request(answerbox_t *box,call_t *call) |
205 | { |
225 | { |
206 | int phoneid; |
226 | int phoneid; |
207 | 227 | ||
208 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
228 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
209 | phoneid = phone_alloc(); |
229 | phoneid = phone_alloc(); |
210 | if (phoneid < 0) { /* Failed to allocate phone */ |
230 | if (phoneid < 0) { /* Failed to allocate phone */ |
211 | IPC_SET_RETVAL(call->data, ELIMIT); |
231 | IPC_SET_RETVAL(call->data, ELIMIT); |
212 | ipc_answer(box,call); |
232 | ipc_answer(box,call); |
213 | return -1; |
233 | return -1; |
214 | } |
234 | } |
215 | IPC_SET_ARG3(call->data, phoneid); |
235 | IPC_SET_ARG3(call->data, phoneid); |
216 | } |
236 | } |
217 | return 0; |
237 | return 0; |
218 | } |
238 | } |
219 | 239 | ||
220 | /** Send a call over IPC, wait for reply, return to user |
240 | /** Send a call over IPC, wait for reply, return to user |
221 | * |
241 | * |
222 | * @return Call identification, returns -1 on fatal error, |
242 | * @return Call identification, returns -1 on fatal error, |
223 | -2 on 'Too many async request, handle answers first |
243 | -2 on 'Too many async request, handle answers first |
224 | */ |
244 | */ |
225 | __native sys_ipc_call_sync_fast(__native phoneid, __native method, |
245 | __native sys_ipc_call_sync_fast(__native phoneid, __native method, |
226 | __native arg1, ipc_data_t *data) |
246 | __native arg1, ipc_data_t *data) |
227 | { |
247 | { |
228 | call_t call; |
248 | call_t call; |
229 | phone_t *phone; |
249 | phone_t *phone; |
230 | int res; |
250 | int res; |
231 | 251 | ||
232 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
252 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
233 | 253 | ||
234 | ipc_call_static_init(&call); |
254 | ipc_call_static_init(&call); |
235 | IPC_SET_METHOD(call.data, method); |
255 | IPC_SET_METHOD(call.data, method); |
236 | IPC_SET_ARG1(call.data, arg1); |
256 | IPC_SET_ARG1(call.data, arg1); |
237 | 257 | ||
238 | if (!(res=request_preprocess(&call))) { |
258 | if (!(res=request_preprocess(&call))) { |
239 | ipc_call_sync(phone, &call); |
259 | ipc_call_sync(phone, &call); |
240 | process_answer(&call); |
260 | process_answer(&call); |
241 | } else |
261 | } else |
242 | IPC_SET_RETVAL(call.data, res); |
262 | IPC_SET_RETVAL(call.data, res); |
243 | STRUCT_TO_USPACE(&data->args, &call.data.args); |
263 | STRUCT_TO_USPACE(&data->args, &call.data.args); |
244 | 264 | ||
245 | return 0; |
265 | return 0; |
246 | } |
266 | } |
247 | 267 | ||
248 | /** Synchronous IPC call allowing to send whole message */ |
268 | /** Synchronous IPC call allowing to send whole message */ |
249 | __native sys_ipc_call_sync(__native phoneid, ipc_data_t *question, |
269 | __native sys_ipc_call_sync(__native phoneid, ipc_data_t *question, |
250 | ipc_data_t *reply) |
270 | ipc_data_t *reply) |
251 | { |
271 | { |
252 | call_t call; |
272 | call_t call; |
253 | phone_t *phone; |
273 | phone_t *phone; |
254 | int res; |
274 | int res; |
255 | int rc; |
275 | int rc; |
256 | 276 | ||
257 | ipc_call_static_init(&call); |
277 | ipc_call_static_init(&call); |
258 | rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args)); |
278 | rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args)); |
259 | if (rc != 0) |
279 | if (rc != 0) |
260 | return (__native) rc; |
280 | return (__native) rc; |
261 | 281 | ||
262 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
282 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
263 | 283 | ||
264 | if (!(res=request_preprocess(&call))) { |
284 | if (!(res=request_preprocess(&call))) { |
265 | ipc_call_sync(phone, &call); |
285 | ipc_call_sync(phone, &call); |
266 | process_answer(&call); |
286 | process_answer(&call); |
267 | } else |
287 | } else |
268 | IPC_SET_RETVAL(call.data, res); |
288 | IPC_SET_RETVAL(call.data, res); |
269 | 289 | ||
270 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
290 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
271 | if (rc != 0) |
291 | if (rc != 0) |
272 | return rc; |
292 | return rc; |
273 | 293 | ||
274 | return 0; |
294 | return 0; |
275 | } |
295 | } |
276 | 296 | ||
277 | /** Check that the task did not exceed allowed limit |
297 | /** Check that the task did not exceed allowed limit |
278 | * |
298 | * |
279 | * @return 0 - Limit OK, -1 - limit exceeded |
299 | * @return 0 - Limit OK, -1 - limit exceeded |
280 | */ |
300 | */ |
281 | static int check_call_limit(void) |
301 | static int check_call_limit(void) |
282 | { |
302 | { |
283 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
303 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
284 | atomic_dec(&TASK->active_calls); |
304 | atomic_dec(&TASK->active_calls); |
285 | return -1; |
305 | return -1; |
286 | } |
306 | } |
287 | return 0; |
307 | return 0; |
288 | } |
308 | } |
289 | 309 | ||
290 | /** Send an asynchronous call over ipc |
310 | /** Send an asynchronous call over ipc |
291 | * |
311 | * |
292 | * @return Call identification, returns -1 on fatal error, |
312 | * @return Call identification, returns -1 on fatal error, |
293 | -2 on 'Too many async request, handle answers first |
313 | -2 on 'Too many async request, handle answers first |
294 | */ |
314 | */ |
295 | __native sys_ipc_call_async_fast(__native phoneid, __native method, |
315 | __native sys_ipc_call_async_fast(__native phoneid, __native method, |
296 | __native arg1, __native arg2) |
316 | __native arg1, __native arg2) |
297 | { |
317 | { |
298 | call_t *call; |
318 | call_t *call; |
299 | phone_t *phone; |
319 | phone_t *phone; |
300 | int res; |
320 | int res; |
301 | 321 | ||
302 | if (check_call_limit()) |
322 | if (check_call_limit()) |
303 | return IPC_CALLRET_TEMPORARY; |
323 | return IPC_CALLRET_TEMPORARY; |
304 | 324 | ||
305 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
325 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
306 | 326 | ||
307 | call = ipc_call_alloc(0); |
327 | call = ipc_call_alloc(0); |
308 | IPC_SET_METHOD(call->data, method); |
328 | IPC_SET_METHOD(call->data, method); |
309 | IPC_SET_ARG1(call->data, arg1); |
329 | IPC_SET_ARG1(call->data, arg1); |
310 | IPC_SET_ARG2(call->data, arg2); |
330 | IPC_SET_ARG2(call->data, arg2); |
311 | 331 | ||
312 | if (!(res=request_preprocess(call))) |
332 | if (!(res=request_preprocess(call))) |
313 | ipc_call(phone, call); |
333 | ipc_call(phone, call); |
314 | else |
334 | else |
315 | ipc_backsend_err(phone, call, res); |
335 | ipc_backsend_err(phone, call, res); |
316 | 336 | ||
317 | return (__native) call; |
337 | return (__native) call; |
318 | } |
338 | } |
319 | 339 | ||
320 | /** Synchronous IPC call allowing to send whole message |
340 | /** Synchronous IPC call allowing to send whole message |
321 | * |
341 | * |
322 | * @return The same as sys_ipc_call_async |
342 | * @return The same as sys_ipc_call_async |
323 | */ |
343 | */ |
324 | __native sys_ipc_call_async(__native phoneid, ipc_data_t *data) |
344 | __native sys_ipc_call_async(__native phoneid, ipc_data_t *data) |
325 | { |
345 | { |
326 | call_t *call; |
346 | call_t *call; |
327 | phone_t *phone; |
347 | phone_t *phone; |
328 | int res; |
348 | int res; |
329 | int rc; |
349 | int rc; |
330 | 350 | ||
331 | if (check_call_limit()) |
351 | if (check_call_limit()) |
332 | return IPC_CALLRET_TEMPORARY; |
352 | return IPC_CALLRET_TEMPORARY; |
333 | 353 | ||
334 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
354 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
335 | 355 | ||
336 | call = ipc_call_alloc(0); |
356 | call = ipc_call_alloc(0); |
337 | rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args)); |
357 | rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args)); |
338 | if (rc != 0) { |
358 | if (rc != 0) { |
339 | ipc_call_free(call); |
359 | ipc_call_free(call); |
340 | return (__native) rc; |
360 | return (__native) rc; |
341 | } |
361 | } |
342 | if (!(res=request_preprocess(call))) |
362 | if (!(res=request_preprocess(call))) |
343 | ipc_call(phone, call); |
363 | ipc_call(phone, call); |
344 | else |
364 | else |
345 | ipc_backsend_err(phone, call, res); |
365 | ipc_backsend_err(phone, call, res); |
346 | 366 | ||
347 | return (__native) call; |
367 | return (__native) call; |
348 | } |
368 | } |
349 | 369 | ||
350 | /** Forward received call to another destination |
370 | /** Forward received call to another destination |
351 | * |
371 | * |
352 | * The arg1 and arg2 are changed in the forwarded message |
372 | * The arg1 and arg2 are changed in the forwarded message |
353 | * |
373 | * |
354 | * Warning: If implementing non-fast version, make sure that |
374 | * Warning: If implementing non-fast version, make sure that |
355 | * arg3 is not rewritten for certain system IPC |
375 | * arg3 is not rewritten for certain system IPC |
356 | */ |
376 | */ |
357 | __native sys_ipc_forward_fast(__native callid, __native phoneid, |
377 | __native sys_ipc_forward_fast(__native callid, __native phoneid, |
358 | __native method, __native arg1) |
378 | __native method, __native arg1) |
359 | { |
379 | { |
360 | call_t *call; |
380 | call_t *call; |
361 | phone_t *phone; |
381 | phone_t *phone; |
362 | 382 | ||
363 | call = get_call(callid); |
383 | call = get_call(callid); |
364 | if (!call) |
384 | if (!call) |
365 | return ENOENT; |
385 | return ENOENT; |
366 | 386 | ||
367 | call->flags |= IPC_CALL_FORWARDED; |
387 | call->flags |= IPC_CALL_FORWARDED; |
368 | 388 | ||
369 | GET_CHECK_PHONE(phone, phoneid, { |
389 | GET_CHECK_PHONE(phone, phoneid, { |
370 | IPC_SET_RETVAL(call->data, EFORWARD); |
390 | IPC_SET_RETVAL(call->data, EFORWARD); |
371 | ipc_answer(&TASK->answerbox, call); |
391 | ipc_answer(&TASK->answerbox, call); |
372 | return ENOENT; |
392 | return ENOENT; |
373 | }); |
393 | }); |
374 | 394 | ||
375 | if (!is_forwardable(IPC_GET_METHOD(call->data))) { |
395 | if (!is_forwardable(IPC_GET_METHOD(call->data))) { |
376 | IPC_SET_RETVAL(call->data, EFORWARD); |
396 | IPC_SET_RETVAL(call->data, EFORWARD); |
377 | ipc_answer(&TASK->answerbox, call); |
397 | ipc_answer(&TASK->answerbox, call); |
378 | return EPERM; |
398 | return EPERM; |
379 | } |
399 | } |
380 | 400 | ||
381 | /* Userspace is not allowed to change method of system methods |
401 | /* Userspace is not allowed to change method of system methods |
382 | * on forward, allow changing ARG1 and ARG2 by means of method and arg1 |
402 | * on forward, allow changing ARG1 and ARG2 by means of method and arg1 |
383 | */ |
403 | */ |
384 | if (is_system_method(IPC_GET_METHOD(call->data))) { |
404 | if (is_system_method(IPC_GET_METHOD(call->data))) { |
385 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
405 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
386 | phone_dealloc(IPC_GET_ARG3(call->data)); |
406 | phone_dealloc(IPC_GET_ARG3(call->data)); |
387 | 407 | ||
388 | IPC_SET_ARG1(call->data, method); |
408 | IPC_SET_ARG1(call->data, method); |
389 | IPC_SET_ARG2(call->data, arg1); |
409 | IPC_SET_ARG2(call->data, arg1); |
390 | } else { |
410 | } else { |
391 | IPC_SET_METHOD(call->data, method); |
411 | IPC_SET_METHOD(call->data, method); |
392 | IPC_SET_ARG1(call->data, arg1); |
412 | IPC_SET_ARG1(call->data, arg1); |
393 | } |
413 | } |
394 | 414 | ||
395 | return ipc_forward(call, phone, &TASK->answerbox); |
415 | return ipc_forward(call, phone, &TASK->answerbox); |
396 | } |
416 | } |
397 | 417 | ||
398 | /** Send IPC answer */ |
418 | /** Send IPC answer */ |
399 | __native sys_ipc_answer_fast(__native callid, __native retval, |
419 | __native sys_ipc_answer_fast(__native callid, __native retval, |
400 | __native arg1, __native arg2) |
420 | __native arg1, __native arg2) |
401 | { |
421 | { |
402 | call_t *call; |
422 | call_t *call; |
403 | ipc_data_t saved_data; |
423 | ipc_data_t saved_data; |
404 | int saveddata = 0; |
424 | int saveddata = 0; |
405 | int rc; |
425 | int rc; |
406 | 426 | ||
407 | /* Do not answer notification callids */ |
427 | /* Do not answer notification callids */ |
408 | if (callid & IPC_CALLID_NOTIFICATION) |
428 | if (callid & IPC_CALLID_NOTIFICATION) |
409 | return 0; |
429 | return 0; |
410 | 430 | ||
411 | call = get_call(callid); |
431 | call = get_call(callid); |
412 | if (!call) |
432 | if (!call) |
413 | return ENOENT; |
433 | return ENOENT; |
414 | 434 | ||
415 | if (answer_need_old(call)) { |
435 | if (answer_need_old(call)) { |
416 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
436 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
417 | saveddata = 1; |
437 | saveddata = 1; |
418 | } |
438 | } |
419 | 439 | ||
420 | IPC_SET_RETVAL(call->data, retval); |
440 | IPC_SET_RETVAL(call->data, retval); |
421 | IPC_SET_ARG1(call->data, arg1); |
441 | IPC_SET_ARG1(call->data, arg1); |
422 | IPC_SET_ARG2(call->data, arg2); |
442 | IPC_SET_ARG2(call->data, arg2); |
423 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
443 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
424 | 444 | ||
425 | ipc_answer(&TASK->answerbox, call); |
445 | ipc_answer(&TASK->answerbox, call); |
426 | return rc; |
446 | return rc; |
427 | } |
447 | } |
428 | 448 | ||
429 | /** Send IPC answer */ |
449 | /** Send IPC answer */ |
430 | __native sys_ipc_answer(__native callid, ipc_data_t *data) |
450 | __native sys_ipc_answer(__native callid, ipc_data_t *data) |
431 | { |
451 | { |
432 | call_t *call; |
452 | call_t *call; |
433 | ipc_data_t saved_data; |
453 | ipc_data_t saved_data; |
434 | int saveddata = 0; |
454 | int saveddata = 0; |
435 | int rc; |
455 | int rc; |
436 | 456 | ||
437 | /* Do not answer notification callids */ |
457 | /* Do not answer notification callids */ |
438 | if (callid & IPC_CALLID_NOTIFICATION) |
458 | if (callid & IPC_CALLID_NOTIFICATION) |
439 | return 0; |
459 | return 0; |
440 | 460 | ||
441 | call = get_call(callid); |
461 | call = get_call(callid); |
442 | if (!call) |
462 | if (!call) |
443 | return ENOENT; |
463 | return ENOENT; |
444 | 464 | ||
445 | if (answer_need_old(call)) { |
465 | if (answer_need_old(call)) { |
446 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
466 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
447 | saveddata = 1; |
467 | saveddata = 1; |
448 | } |
468 | } |
449 | rc = copy_from_uspace(&call->data.args, &data->args, |
469 | rc = copy_from_uspace(&call->data.args, &data->args, |
450 | sizeof(call->data.args)); |
470 | sizeof(call->data.args)); |
451 | if (rc != 0) |
471 | if (rc != 0) |
452 | return rc; |
472 | return rc; |
453 | 473 | ||
454 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
474 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
455 | 475 | ||
456 | ipc_answer(&TASK->answerbox, call); |
476 | ipc_answer(&TASK->answerbox, call); |
457 | 477 | ||
458 | return rc; |
478 | return rc; |
459 | } |
479 | } |
460 | 480 | ||
461 | /** Hang up the phone |
481 | /** Hang up the phone |
462 | * |
482 | * |
463 | */ |
483 | */ |
464 | __native sys_ipc_hangup(int phoneid) |
484 | __native sys_ipc_hangup(int phoneid) |
465 | { |
485 | { |
466 | phone_t *phone; |
486 | phone_t *phone; |
467 | 487 | ||
468 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
488 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
469 | 489 | ||
470 | if (ipc_phone_hangup(phone)) |
490 | if (ipc_phone_hangup(phone)) |
471 | return -1; |
491 | return -1; |
472 | 492 | ||
473 | return 0; |
493 | return 0; |
474 | } |
494 | } |
475 | 495 | ||
476 | /** Wait for incoming ipc call or answer |
496 | /** Wait for incoming ipc call or answer |
477 | * |
497 | * |
478 | * @param calldata Pointer to buffer where the call/answer data is stored |
498 | * @param calldata Pointer to buffer where the call/answer data is stored |
479 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
499 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
480 | * @param nonblocking See waitq_sleep_timeout() for explanation. |
500 | * @param nonblocking See waitq_sleep_timeout() for explanation. |
481 | * |
501 | * |
482 | * @return Callid, if callid & 1, then the call is answer |
502 | * @return Callid, if callid & 1, then the call is answer |
483 | */ |
503 | */ |
484 | __native sys_ipc_wait_for_call(ipc_data_t *calldata, __u32 usec, int nonblocking) |
504 | __native sys_ipc_wait_for_call(ipc_data_t *calldata, __u32 usec, int nonblocking) |
485 | { |
505 | { |
486 | call_t *call; |
506 | call_t *call; |
487 | 507 | ||
488 | restart: |
508 | restart: |
489 | call = ipc_wait_for_call(&TASK->answerbox, usec, nonblocking); |
509 | call = ipc_wait_for_call(&TASK->answerbox, usec, nonblocking); |
490 | if (!call) |
510 | if (!call) |
491 | return 0; |
511 | return 0; |
492 | 512 | ||
493 | if (call->flags & IPC_CALL_NOTIF) { |
513 | if (call->flags & IPC_CALL_NOTIF) { |
494 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
514 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
495 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
515 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
496 | ipc_call_free(call); |
516 | ipc_call_free(call); |
497 | 517 | ||
498 | return ((__native)call) | IPC_CALLID_NOTIFICATION; |
518 | return ((__native)call) | IPC_CALLID_NOTIFICATION; |
499 | } |
519 | } |
500 | 520 | ||
501 | if (call->flags & IPC_CALL_ANSWERED) { |
521 | if (call->flags & IPC_CALL_ANSWERED) { |
502 | process_answer(call); |
522 | process_answer(call); |
503 | 523 | ||
504 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
524 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
505 | 525 | ||
506 | atomic_dec(&TASK->active_calls); |
526 | atomic_dec(&TASK->active_calls); |
507 | 527 | ||
508 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
528 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
509 | ipc_call_free(call); |
529 | ipc_call_free(call); |
510 | goto restart; |
530 | goto restart; |
511 | } |
531 | } |
512 | 532 | ||
513 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
533 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
514 | ipc_call_free(call); |
534 | ipc_call_free(call); |
515 | 535 | ||
516 | return ((__native)call) | IPC_CALLID_ANSWERED; |
536 | return ((__native)call) | IPC_CALLID_ANSWERED; |
517 | } |
537 | } |
518 | 538 | ||
519 | if (process_request(&TASK->answerbox, call)) |
539 | if (process_request(&TASK->answerbox, call)) |
520 | goto restart; |
540 | goto restart; |
521 | 541 | ||
522 | /* Include phone address('id') of the caller in the request, |
542 | /* Include phone address('id') of the caller in the request, |
523 | * copy whole call->data, not only call->data.args */ |
543 | * copy whole call->data, not only call->data.args */ |
524 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
544 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
525 | return 0; |
545 | return 0; |
526 | } |
546 | } |
527 | return (__native)call; |
547 | return (__native)call; |
528 | } |
548 | } |
529 | 549 | ||
530 | /** Connect irq handler to task */ |
550 | /** Connect irq handler to task */ |
531 | __native sys_ipc_register_irq(__native irq, irq_code_t *ucode) |
551 | __native sys_ipc_register_irq(__native irq, irq_code_t *ucode) |
532 | { |
552 | { |
533 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
553 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
534 | return EPERM; |
554 | return EPERM; |
535 | 555 | ||
536 | if (irq >= IRQ_COUNT) |
556 | if (irq >= IRQ_COUNT) |
537 | return (__native) ELIMIT; |
557 | return (__native) ELIMIT; |
538 | 558 | ||
539 | irq_ipc_bind_arch(irq); |
559 | irq_ipc_bind_arch(irq); |
540 | 560 | ||
541 | return ipc_irq_register(&TASK->answerbox, irq, ucode); |
561 | return ipc_irq_register(&TASK->answerbox, irq, ucode); |
542 | } |
562 | } |
543 | 563 | ||
544 | /* Disconnect irq handler from task */ |
564 | /* Disconnect irq handler from task */ |
545 | __native sys_ipc_unregister_irq(__native irq) |
565 | __native sys_ipc_unregister_irq(__native irq) |
546 | { |
566 | { |
547 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
567 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
548 | return EPERM; |
568 | return EPERM; |
549 | 569 | ||
550 | if (irq >= IRQ_COUNT) |
570 | if (irq >= IRQ_COUNT) |
551 | return (__native) ELIMIT; |
571 | return (__native) ELIMIT; |
552 | 572 | ||
553 | ipc_irq_unregister(&TASK->answerbox, irq); |
573 | ipc_irq_unregister(&TASK->answerbox, irq); |
554 | 574 | ||
555 | return 0; |
575 | return 0; |
556 | } |
576 | } |
557 | 577 |