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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 method_is_system(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 method_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 | /* This message is meant only for the original recipient. */ |
93 | /* This message is meant only for the original recipient. */ |
94 | return 0; |
94 | return 0; |
95 | default: |
95 | default: |
96 | return 1; |
96 | return 1; |
97 | } |
97 | } |
98 | } |
98 | } |
99 | 99 | ||
100 | /** Decide if the message with this method is immutable on forward. |
100 | /** Decide if the message with this method is immutable on forward. |
101 | * |
101 | * |
102 | * - some system messages may be forwarded but their content cannot be altered |
102 | * - some system messages may be forwarded but their content cannot be altered |
103 | * |
103 | * |
104 | * @param method Method to be decided. |
104 | * @param method Method to be decided. |
105 | * |
105 | * |
106 | * @return Return 1 if the method is immutable on forward. |
106 | * @return Return 1 if the method is immutable on forward. |
107 | * Otherwise return 0. |
107 | * Otherwise return 0. |
108 | */ |
108 | */ |
109 | static inline int method_is_immutable(unative_t method) |
109 | static inline int method_is_immutable(unative_t method) |
110 | { |
110 | { |
111 | switch (method) { |
111 | switch (method) { |
112 | case IPC_M_AS_AREA_SEND: |
112 | case IPC_M_AS_AREA_SEND: |
113 | case IPC_M_AS_AREA_RECV: |
113 | case IPC_M_AS_AREA_RECV: |
114 | case IPC_M_DATA_SEND: |
114 | case IPC_M_DATA_SEND: |
115 | return 1; |
115 | return 1; |
116 | break; |
116 | break; |
117 | default: |
117 | default: |
118 | return 0; |
118 | return 0; |
119 | } |
119 | } |
120 | } |
120 | } |
121 | 121 | ||
122 | 122 | ||
123 | /*********************************************************************** |
123 | /*********************************************************************** |
124 | * Functions that preprocess answer before sending it to the recepient. |
124 | * Functions that preprocess answer before sending it to the recepient. |
125 | ***********************************************************************/ |
125 | ***********************************************************************/ |
126 | 126 | ||
127 | /** Decide if the caller (e.g. ipc_answer()) should save the old call contents |
127 | /** Decide if the caller (e.g. ipc_answer()) should save the old call contents |
128 | * for answer_preprocess(). |
128 | * for answer_preprocess(). |
129 | * |
129 | * |
130 | * @param call Call structure to be decided. |
130 | * @param call Call structure to be decided. |
131 | * |
131 | * |
132 | * @return Return 1 if the old call contents should be saved. |
132 | * @return Return 1 if the old call contents should be saved. |
133 | * Return 0 otherwise. |
133 | * Return 0 otherwise. |
134 | */ |
134 | */ |
135 | static inline int answer_need_old(call_t *call) |
135 | static inline int answer_need_old(call_t *call) |
136 | { |
136 | { |
137 | switch (IPC_GET_METHOD(call->data)) { |
137 | switch (IPC_GET_METHOD(call->data)) { |
138 | case IPC_M_CONNECT_TO_ME: |
138 | case IPC_M_CONNECT_TO_ME: |
139 | case IPC_M_CONNECT_ME_TO: |
139 | case IPC_M_CONNECT_ME_TO: |
140 | case IPC_M_AS_AREA_SEND: |
140 | case IPC_M_AS_AREA_SEND: |
141 | case IPC_M_AS_AREA_RECV: |
141 | case IPC_M_AS_AREA_RECV: |
142 | case IPC_M_DATA_SEND: |
142 | case IPC_M_DATA_SEND: |
143 | return 1; |
143 | return 1; |
144 | default: |
144 | default: |
145 | return 0; |
145 | return 0; |
146 | } |
146 | } |
147 | } |
147 | } |
148 | 148 | ||
149 | /** Interpret process answer as control information. |
149 | /** Interpret process answer as control information. |
150 | * |
150 | * |
151 | * This function is called directly after sys_ipc_answer(). |
151 | * This function is called directly after sys_ipc_answer(). |
152 | * |
152 | * |
153 | * @param answer Call structure with the answer. |
153 | * @param answer Call structure with the answer. |
154 | * @param olddata Saved data of the request. |
154 | * @param olddata Saved data of the request. |
155 | * |
155 | * |
156 | * @return Return 0 on success or an error code. |
156 | * @return Return 0 on success or an error code. |
157 | */ |
157 | */ |
158 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
158 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
159 | { |
159 | { |
160 | int phoneid; |
160 | int phoneid; |
161 | 161 | ||
162 | if (IPC_GET_RETVAL(answer->data) == EHANGUP) { |
162 | if (IPC_GET_RETVAL(answer->data) == EHANGUP) { |
163 | /* In case of forward, hangup the forwared phone, |
163 | /* In case of forward, hangup the forwared phone, |
164 | * not the originator |
164 | * not the originator |
165 | */ |
165 | */ |
166 | spinlock_lock(&answer->data.phone->lock); |
166 | spinlock_lock(&answer->data.phone->lock); |
167 | spinlock_lock(&TASK->answerbox.lock); |
167 | spinlock_lock(&TASK->answerbox.lock); |
168 | if (answer->data.phone->state == IPC_PHONE_CONNECTED) { |
168 | if (answer->data.phone->state == IPC_PHONE_CONNECTED) { |
169 | list_remove(&answer->data.phone->link); |
169 | list_remove(&answer->data.phone->link); |
170 | answer->data.phone->state = IPC_PHONE_SLAMMED; |
170 | answer->data.phone->state = IPC_PHONE_SLAMMED; |
171 | } |
171 | } |
172 | spinlock_unlock(&TASK->answerbox.lock); |
172 | spinlock_unlock(&TASK->answerbox.lock); |
173 | spinlock_unlock(&answer->data.phone->lock); |
173 | spinlock_unlock(&answer->data.phone->lock); |
174 | } |
174 | } |
175 | 175 | ||
176 | if (!olddata) |
176 | if (!olddata) |
177 | return 0; |
177 | return 0; |
178 | 178 | ||
179 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
179 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
180 | phoneid = IPC_GET_ARG3(*olddata); |
180 | phoneid = IPC_GET_ARG3(*olddata); |
181 | if (IPC_GET_RETVAL(answer->data)) { |
181 | if (IPC_GET_RETVAL(answer->data)) { |
182 | /* The connection was not accepted */ |
182 | /* The connection was not accepted */ |
183 | phone_dealloc(phoneid); |
183 | phone_dealloc(phoneid); |
184 | } else { |
184 | } else { |
185 | /* The connection was accepted */ |
185 | /* The connection was accepted */ |
186 | phone_connect(phoneid, &answer->sender->answerbox); |
186 | phone_connect(phoneid, &answer->sender->answerbox); |
187 | /* Set 'phone hash' as arg3 of response */ |
187 | /* Set 'phone hash' as arg3 of response */ |
188 | IPC_SET_ARG3(answer->data, |
188 | IPC_SET_ARG3(answer->data, |
189 | (unative_t) &TASK->phones[phoneid]); |
189 | (unative_t) &TASK->phones[phoneid]); |
190 | } |
190 | } |
191 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
191 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
192 | /* If the users accepted call, connect */ |
192 | /* If the users accepted call, connect */ |
193 | if (!IPC_GET_RETVAL(answer->data)) { |
193 | if (!IPC_GET_RETVAL(answer->data)) { |
194 | ipc_phone_connect((phone_t *) IPC_GET_ARG3(*olddata), |
194 | ipc_phone_connect((phone_t *) IPC_GET_ARG3(*olddata), |
195 | &TASK->answerbox); |
195 | &TASK->answerbox); |
196 | } |
196 | } |
197 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) { |
197 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) { |
198 | if (!IPC_GET_RETVAL(answer->data)) { |
198 | if (!IPC_GET_RETVAL(answer->data)) { |
199 | /* Accepted, handle as_area receipt */ |
199 | /* Accepted, handle as_area receipt */ |
200 | ipl_t ipl; |
200 | ipl_t ipl; |
201 | int rc; |
201 | int rc; |
202 | as_t *as; |
202 | as_t *as; |
203 | 203 | ||
204 | ipl = interrupts_disable(); |
204 | ipl = interrupts_disable(); |
205 | spinlock_lock(&answer->sender->lock); |
205 | spinlock_lock(&answer->sender->lock); |
206 | as = answer->sender->as; |
206 | as = answer->sender->as; |
207 | spinlock_unlock(&answer->sender->lock); |
207 | spinlock_unlock(&answer->sender->lock); |
208 | interrupts_restore(ipl); |
208 | interrupts_restore(ipl); |
209 | 209 | ||
210 | rc = as_area_share(as, IPC_GET_ARG1(*olddata), |
210 | rc = as_area_share(as, IPC_GET_ARG1(*olddata), |
211 | IPC_GET_ARG2(*olddata), AS, |
211 | IPC_GET_ARG2(*olddata), AS, |
212 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
212 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
213 | IPC_SET_RETVAL(answer->data, rc); |
213 | IPC_SET_RETVAL(answer->data, rc); |
214 | return rc; |
214 | return rc; |
215 | } |
215 | } |
216 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) { |
216 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_RECV) { |
217 | if (!IPC_GET_RETVAL(answer->data)) { |
217 | if (!IPC_GET_RETVAL(answer->data)) { |
218 | ipl_t ipl; |
218 | ipl_t ipl; |
219 | as_t *as; |
219 | as_t *as; |
220 | int rc; |
220 | int rc; |
221 | 221 | ||
222 | ipl = interrupts_disable(); |
222 | ipl = interrupts_disable(); |
223 | spinlock_lock(&answer->sender->lock); |
223 | spinlock_lock(&answer->sender->lock); |
224 | as = answer->sender->as; |
224 | as = answer->sender->as; |
225 | spinlock_unlock(&answer->sender->lock); |
225 | spinlock_unlock(&answer->sender->lock); |
226 | interrupts_restore(ipl); |
226 | interrupts_restore(ipl); |
227 | 227 | ||
228 | rc = as_area_share(AS, IPC_GET_ARG1(answer->data), |
228 | rc = as_area_share(AS, IPC_GET_ARG1(answer->data), |
229 | IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata), |
229 | IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata), |
230 | IPC_GET_ARG2(answer->data)); |
230 | IPC_GET_ARG2(answer->data)); |
231 | IPC_SET_RETVAL(answer->data, rc); |
231 | IPC_SET_RETVAL(answer->data, rc); |
232 | } |
232 | } |
233 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_SEND) { |
233 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_SEND) { |
234 | if (!IPC_GET_RETVAL(answer->data)) { |
234 | if (!IPC_GET_RETVAL(answer->data)) { |
235 | int rc; |
235 | int rc; |
236 | uintptr_t dst; |
236 | uintptr_t dst; |
237 | uintptr_t size; |
237 | uintptr_t size; |
238 | 238 | ||
239 | ASSERT(answer->buffer); |
239 | ASSERT(answer->buffer); |
240 | 240 | ||
241 | dst = IPC_GET_ARG1(answer->data); |
241 | dst = IPC_GET_ARG1(answer->data); |
242 | size = IPC_GET_ARG3(answer->data); |
242 | size = IPC_GET_ARG3(answer->data); |
243 | 243 | ||
244 | rc = copy_to_uspace((void *) dst, answer->buffer, size); |
244 | rc = copy_to_uspace((void *) dst, answer->buffer, size); |
245 | if (rc != 0) |
245 | if (rc != 0) |
246 | IPC_SET_RETVAL(answer->data, rc); |
246 | IPC_SET_RETVAL(answer->data, rc); |
247 | free(answer->buffer); |
247 | free(answer->buffer); |
248 | answer->buffer = NULL; |
248 | answer->buffer = NULL; |
249 | } |
249 | } |
250 | } |
250 | } |
251 | return 0; |
251 | return 0; |
252 | } |
252 | } |
253 | 253 | ||
254 | /** Called before the request is sent. |
254 | /** Called before the request is sent. |
255 | * |
255 | * |
256 | * @param call Call structure with the request. |
256 | * @param call Call structure with the request. |
257 | * |
257 | * |
258 | * @return Return 0 on success, ELIMIT or EPERM on error. |
258 | * @return Return 0 on success, ELIMIT or EPERM on error. |
259 | */ |
259 | */ |
260 | static int request_preprocess(call_t *call) |
260 | static int request_preprocess(call_t *call) |
261 | { |
261 | { |
262 | int newphid; |
262 | int newphid; |
263 | size_t size; |
263 | size_t size; |
264 | uintptr_t src; |
264 | uintptr_t src; |
265 | int rc; |
265 | int rc; |
266 | 266 | ||
267 | switch (IPC_GET_METHOD(call->data)) { |
267 | switch (IPC_GET_METHOD(call->data)) { |
268 | case IPC_M_CONNECT_ME_TO: |
268 | case IPC_M_CONNECT_ME_TO: |
269 | newphid = phone_alloc(); |
269 | newphid = phone_alloc(); |
270 | if (newphid < 0) |
270 | if (newphid < 0) |
271 | return ELIMIT; |
271 | return ELIMIT; |
272 | /* Set arg3 for server */ |
272 | /* Set arg3 for server */ |
273 | IPC_SET_ARG3(call->data, (unative_t) &TASK->phones[newphid]); |
273 | IPC_SET_ARG3(call->data, (unative_t) &TASK->phones[newphid]); |
274 | call->flags |= IPC_CALL_CONN_ME_TO; |
274 | call->flags |= IPC_CALL_CONN_ME_TO; |
275 | call->priv = newphid; |
275 | call->priv = newphid; |
276 | break; |
276 | break; |
277 | case IPC_M_AS_AREA_SEND: |
277 | case IPC_M_AS_AREA_SEND: |
278 | size = as_area_get_size(IPC_GET_ARG1(call->data)); |
278 | size = as_area_get_size(IPC_GET_ARG1(call->data)); |
279 | if (!size) |
279 | if (!size) |
280 | return EPERM; |
280 | return EPERM; |
281 | IPC_SET_ARG2(call->data, size); |
281 | IPC_SET_ARG2(call->data, size); |
282 | break; |
282 | break; |
283 | case IPC_M_DATA_SEND: |
283 | case IPC_M_DATA_SEND: |
284 | src = IPC_GET_ARG2(call->data); |
284 | src = IPC_GET_ARG2(call->data); |
285 | size = IPC_GET_ARG3(call->data); |
285 | size = IPC_GET_ARG3(call->data); |
286 | 286 | ||
287 | if ((size <= 0) || (size > DATA_SEND_LIMIT)) |
287 | if ((size <= 0) || (size > DATA_SEND_LIMIT)) |
288 | return ELIMIT; |
288 | return ELIMIT; |
289 | 289 | ||
290 | call->buffer = (uint8_t *) malloc(size, 0); |
290 | call->buffer = (uint8_t *) malloc(size, 0); |
291 | rc = copy_from_uspace(call->buffer, (void *) src, size); |
291 | rc = copy_from_uspace(call->buffer, (void *) src, size); |
292 | if (rc != 0) { |
292 | if (rc != 0) { |
293 | free(call->buffer); |
293 | free(call->buffer); |
294 | return rc; |
294 | return rc; |
295 | } |
295 | } |
296 | break; |
296 | break; |
297 | default: |
297 | default: |
298 | break; |
298 | break; |
299 | } |
299 | } |
300 | return 0; |
300 | return 0; |
301 | } |
301 | } |
302 | 302 | ||
303 | /******************************************************************************* |
303 | /******************************************************************************* |
304 | * Functions called to process received call/answer before passing it to uspace. |
304 | * Functions called to process received call/answer before passing it to uspace. |
305 | *******************************************************************************/ |
305 | *******************************************************************************/ |
306 | 306 | ||
307 | /** Do basic kernel processing of received call answer. |
307 | /** Do basic kernel processing of received call answer. |
308 | * |
308 | * |
309 | * @param call Call structure with the answer. |
309 | * @param call Call structure with the answer. |
310 | */ |
310 | */ |
311 | static void process_answer(call_t *call) |
311 | static void process_answer(call_t *call) |
312 | { |
312 | { |
313 | if (IPC_GET_RETVAL(call->data) == EHANGUP && |
313 | if (IPC_GET_RETVAL(call->data) == EHANGUP && |
314 | (call->flags & IPC_CALL_FORWARDED)) |
314 | (call->flags & IPC_CALL_FORWARDED)) |
315 | IPC_SET_RETVAL(call->data, EFORWARD); |
315 | IPC_SET_RETVAL(call->data, EFORWARD); |
316 | 316 | ||
317 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
317 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
318 | if (IPC_GET_RETVAL(call->data)) |
318 | if (IPC_GET_RETVAL(call->data)) |
319 | phone_dealloc(call->priv); |
319 | phone_dealloc(call->priv); |
320 | else |
320 | else |
321 | IPC_SET_ARG3(call->data, call->priv); |
321 | IPC_SET_ARG3(call->data, call->priv); |
322 | } |
322 | } |
323 | } |
323 | } |
324 | 324 | ||
325 | /** Do basic kernel processing of received call request. |
325 | /** Do basic kernel processing of received call request. |
326 | * |
326 | * |
327 | * @param box Destination answerbox structure. |
327 | * @param box Destination answerbox structure. |
328 | * @param call Call structure with the request. |
328 | * @param call Call structure with the request. |
329 | * |
329 | * |
330 | * @return Return 0 if the call should be passed to userspace. |
330 | * @return Return 0 if the call should be passed to userspace. |
331 | * Return -1 if the call should be ignored. |
331 | * Return -1 if the call should be ignored. |
332 | */ |
332 | */ |
333 | static int process_request(answerbox_t *box, call_t *call) |
333 | static int process_request(answerbox_t *box, call_t *call) |
334 | { |
334 | { |
335 | int phoneid; |
335 | int phoneid; |
336 | 336 | ||
337 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
337 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
338 | phoneid = phone_alloc(); |
338 | phoneid = phone_alloc(); |
339 | if (phoneid < 0) { /* Failed to allocate phone */ |
339 | if (phoneid < 0) { /* Failed to allocate phone */ |
340 | IPC_SET_RETVAL(call->data, ELIMIT); |
340 | IPC_SET_RETVAL(call->data, ELIMIT); |
341 | ipc_answer(box, call); |
341 | ipc_answer(box, call); |
342 | return -1; |
342 | return -1; |
343 | } |
343 | } |
344 | IPC_SET_ARG3(call->data, phoneid); |
344 | IPC_SET_ARG3(call->data, phoneid); |
345 | } |
345 | } |
346 | return 0; |
346 | return 0; |
347 | } |
347 | } |
348 | 348 | ||
349 | /** Make a fast call over IPC, wait for reply and return to user. |
349 | /** Make a fast call over IPC, wait for reply and return to user. |
350 | * |
350 | * |
351 | * This function can handle only three arguments of payload, but is faster than |
351 | * This function can handle only three arguments of payload, but is faster than |
352 | * the generic function (i.e. sys_ipc_call_sync_slow()). |
352 | * the generic function (i.e. sys_ipc_call_sync_slow()). |
353 | * |
353 | * |
354 | * @param phoneid Phone handle for the call. |
354 | * @param phoneid Phone handle for the call. |
355 | * @param method Method of the call. |
355 | * @param method Method of the call. |
356 | * @param arg1 Service-defined payload argument. |
356 | * @param arg1 Service-defined payload argument. |
357 | * @param arg2 Service-defined payload argument. |
357 | * @param arg2 Service-defined payload argument. |
358 | * @param arg3 Service-defined payload argument. |
358 | * @param arg3 Service-defined payload argument. |
359 | * @param data Address of userspace structure where the reply call will |
359 | * @param data Address of userspace structure where the reply call will |
360 | * be stored. |
360 | * be stored. |
361 | * |
361 | * |
362 | * @return Returns 0 on success. |
362 | * @return Returns 0 on success. |
363 | * Return ENOENT if there is no such phone handle. |
363 | * Return ENOENT if there is no such phone handle. |
364 | */ |
364 | */ |
365 | unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method, |
365 | unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method, |
366 | unative_t arg1, unative_t arg2, unative_t arg3, ipc_data_t *data) |
366 | unative_t arg1, unative_t arg2, unative_t arg3, ipc_data_t *data) |
367 | { |
367 | { |
368 | call_t call; |
368 | call_t call; |
369 | phone_t *phone; |
369 | phone_t *phone; |
370 | int res; |
370 | int res; |
371 | int rc; |
371 | int rc; |
372 | 372 | ||
373 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
373 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
374 | 374 | ||
375 | ipc_call_static_init(&call); |
375 | ipc_call_static_init(&call); |
376 | IPC_SET_METHOD(call.data, method); |
376 | IPC_SET_METHOD(call.data, method); |
377 | IPC_SET_ARG1(call.data, arg1); |
377 | IPC_SET_ARG1(call.data, arg1); |
378 | IPC_SET_ARG2(call.data, arg2); |
378 | IPC_SET_ARG2(call.data, arg2); |
379 | IPC_SET_ARG3(call.data, arg3); |
379 | IPC_SET_ARG3(call.data, arg3); |
- | 380 | /* |
|
- | 381 | * To achieve deterministic behavior, zero out arguments that are beyond |
|
- | 382 | * the limits of the fast version. |
|
- | 383 | */ |
|
- | 384 | IPC_SET_ARG4(call.data, 0); |
|
- | 385 | IPC_SET_ARG5(call.data, 0); |
|
380 | 386 | ||
381 | if (!(res = request_preprocess(&call))) { |
387 | if (!(res = request_preprocess(&call))) { |
382 | ipc_call_sync(phone, &call); |
388 | ipc_call_sync(phone, &call); |
383 | process_answer(&call); |
389 | process_answer(&call); |
384 | } else { |
390 | } else { |
385 | IPC_SET_RETVAL(call.data, res); |
391 | IPC_SET_RETVAL(call.data, res); |
386 | } |
392 | } |
387 | rc = STRUCT_TO_USPACE(&data->args, &call.data.args); |
393 | rc = STRUCT_TO_USPACE(&data->args, &call.data.args); |
388 | if (rc != 0) |
394 | if (rc != 0) |
389 | return rc; |
395 | return rc; |
390 | 396 | ||
391 | return 0; |
397 | return 0; |
392 | } |
398 | } |
393 | 399 | ||
394 | /** Make a synchronous IPC call allowing to transmit the entire payload. |
400 | /** Make a synchronous IPC call allowing to transmit the entire payload. |
395 | * |
401 | * |
396 | * @param phoneid Phone handle for the call. |
402 | * @param phoneid Phone handle for the call. |
397 | * @param question Userspace address of call data with the request. |
403 | * @param question Userspace address of call data with the request. |
398 | * @param reply Userspace address of call data where to store the |
404 | * @param reply Userspace address of call data where to store the |
399 | * answer. |
405 | * answer. |
400 | * |
406 | * |
401 | * @return Zero on success or an error code. |
407 | * @return Zero on success or an error code. |
402 | */ |
408 | */ |
403 | unative_t sys_ipc_call_sync_slow(unative_t phoneid, ipc_data_t *question, |
409 | unative_t sys_ipc_call_sync_slow(unative_t phoneid, ipc_data_t *question, |
404 | ipc_data_t *reply) |
410 | ipc_data_t *reply) |
405 | { |
411 | { |
406 | call_t call; |
412 | call_t call; |
407 | phone_t *phone; |
413 | phone_t *phone; |
408 | int res; |
414 | int res; |
409 | int rc; |
415 | int rc; |
410 | 416 | ||
411 | ipc_call_static_init(&call); |
417 | ipc_call_static_init(&call); |
412 | rc = copy_from_uspace(&call.data.args, &question->args, |
418 | rc = copy_from_uspace(&call.data.args, &question->args, |
413 | sizeof(call.data.args)); |
419 | sizeof(call.data.args)); |
414 | if (rc != 0) |
420 | if (rc != 0) |
415 | return (unative_t) rc; |
421 | return (unative_t) rc; |
416 | 422 | ||
417 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
423 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
418 | 424 | ||
419 | if (!(res = request_preprocess(&call))) { |
425 | if (!(res = request_preprocess(&call))) { |
420 | ipc_call_sync(phone, &call); |
426 | ipc_call_sync(phone, &call); |
421 | process_answer(&call); |
427 | process_answer(&call); |
422 | } else |
428 | } else |
423 | IPC_SET_RETVAL(call.data, res); |
429 | IPC_SET_RETVAL(call.data, res); |
424 | 430 | ||
425 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
431 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
426 | if (rc != 0) |
432 | if (rc != 0) |
427 | return rc; |
433 | return rc; |
428 | 434 | ||
429 | return 0; |
435 | return 0; |
430 | } |
436 | } |
431 | 437 | ||
432 | /** Check that the task did not exceed the allowed limit of asynchronous calls. |
438 | /** Check that the task did not exceed the allowed limit of asynchronous calls. |
433 | * |
439 | * |
434 | * @return Return 0 if limit not reached or -1 if limit exceeded. |
440 | * @return Return 0 if limit not reached or -1 if limit exceeded. |
435 | */ |
441 | */ |
436 | static int check_call_limit(void) |
442 | static int check_call_limit(void) |
437 | { |
443 | { |
438 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
444 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
439 | atomic_dec(&TASK->active_calls); |
445 | atomic_dec(&TASK->active_calls); |
440 | return -1; |
446 | return -1; |
441 | } |
447 | } |
442 | return 0; |
448 | return 0; |
443 | } |
449 | } |
444 | 450 | ||
445 | /** Make a fast asynchronous call over IPC. |
451 | /** Make a fast asynchronous call over IPC. |
446 | * |
452 | * |
447 | * This function can only handle four arguments of payload, but is faster than |
453 | * This function can only handle four arguments of payload, but is faster than |
448 | * the generic function sys_ipc_call_async_slow(). |
454 | * the generic function sys_ipc_call_async_slow(). |
449 | * |
455 | * |
450 | * @param phoneid Phone handle for the call. |
456 | * @param phoneid Phone handle for the call. |
451 | * @param method Method of the call. |
457 | * @param method Method of the call. |
452 | * @param arg1 Service-defined payload argument. |
458 | * @param arg1 Service-defined payload argument. |
453 | * @param arg2 Service-defined payload argument. |
459 | * @param arg2 Service-defined payload argument. |
454 | * @param arg3 Service-defined payload argument. |
460 | * @param arg3 Service-defined payload argument. |
455 | * @param arg4 Service-defined payload argument. |
461 | * @param arg4 Service-defined payload argument. |
456 | * |
462 | * |
457 | * @return Return call hash on success. |
463 | * @return Return call hash on success. |
458 | * Return IPC_CALLRET_FATAL in case of a fatal error and |
464 | * Return IPC_CALLRET_FATAL in case of a fatal error and |
459 | * IPC_CALLRET_TEMPORARY if there are too many pending |
465 | * IPC_CALLRET_TEMPORARY if there are too many pending |
460 | * asynchronous requests; answers should be handled first. |
466 | * asynchronous requests; answers should be handled first. |
461 | */ |
467 | */ |
462 | unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method, |
468 | unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method, |
463 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
469 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
464 | { |
470 | { |
465 | call_t *call; |
471 | call_t *call; |
466 | phone_t *phone; |
472 | phone_t *phone; |
467 | int res; |
473 | int res; |
468 | 474 | ||
469 | if (check_call_limit()) |
475 | if (check_call_limit()) |
470 | return IPC_CALLRET_TEMPORARY; |
476 | return IPC_CALLRET_TEMPORARY; |
471 | 477 | ||
472 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
478 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
473 | 479 | ||
474 | call = ipc_call_alloc(0); |
480 | call = ipc_call_alloc(0); |
475 | IPC_SET_METHOD(call->data, method); |
481 | IPC_SET_METHOD(call->data, method); |
476 | IPC_SET_ARG1(call->data, arg1); |
482 | IPC_SET_ARG1(call->data, arg1); |
477 | IPC_SET_ARG2(call->data, arg2); |
483 | IPC_SET_ARG2(call->data, arg2); |
478 | IPC_SET_ARG3(call->data, arg3); |
484 | IPC_SET_ARG3(call->data, arg3); |
479 | IPC_SET_ARG4(call->data, arg4); |
485 | IPC_SET_ARG4(call->data, arg4); |
- | 486 | /* |
|
- | 487 | * To achieve deterministic behavior, zero out arguments that are beyond |
|
- | 488 | * the limits of the fast version. |
|
- | 489 | */ |
|
- | 490 | IPC_SET_ARG5(call->data, 0); |
|
480 | 491 | ||
481 | if (!(res = request_preprocess(call))) |
492 | if (!(res = request_preprocess(call))) |
482 | ipc_call(phone, call); |
493 | ipc_call(phone, call); |
483 | else |
494 | else |
484 | ipc_backsend_err(phone, call, res); |
495 | ipc_backsend_err(phone, call, res); |
485 | 496 | ||
486 | return (unative_t) call; |
497 | return (unative_t) call; |
487 | } |
498 | } |
488 | 499 | ||
489 | /** Make an asynchronous IPC call allowing to transmit the entire payload. |
500 | /** Make an asynchronous IPC call allowing to transmit the entire payload. |
490 | * |
501 | * |
491 | * @param phoneid Phone handle for the call. |
502 | * @param phoneid Phone handle for the call. |
492 | * @param data Userspace address of call data with the request. |
503 | * @param data Userspace address of call data with the request. |
493 | * |
504 | * |
494 | * @return See sys_ipc_call_async_fast(). |
505 | * @return See sys_ipc_call_async_fast(). |
495 | */ |
506 | */ |
496 | unative_t sys_ipc_call_async_slow(unative_t phoneid, ipc_data_t *data) |
507 | unative_t sys_ipc_call_async_slow(unative_t phoneid, ipc_data_t *data) |
497 | { |
508 | { |
498 | call_t *call; |
509 | call_t *call; |
499 | phone_t *phone; |
510 | phone_t *phone; |
500 | int res; |
511 | int res; |
501 | int rc; |
512 | int rc; |
502 | 513 | ||
503 | if (check_call_limit()) |
514 | if (check_call_limit()) |
504 | return IPC_CALLRET_TEMPORARY; |
515 | return IPC_CALLRET_TEMPORARY; |
505 | 516 | ||
506 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
517 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
507 | 518 | ||
508 | call = ipc_call_alloc(0); |
519 | call = ipc_call_alloc(0); |
509 | rc = copy_from_uspace(&call->data.args, &data->args, |
520 | rc = copy_from_uspace(&call->data.args, &data->args, |
510 | sizeof(call->data.args)); |
521 | sizeof(call->data.args)); |
511 | if (rc != 0) { |
522 | if (rc != 0) { |
512 | ipc_call_free(call); |
523 | ipc_call_free(call); |
513 | return (unative_t) rc; |
524 | return (unative_t) rc; |
514 | } |
525 | } |
515 | if (!(res = request_preprocess(call))) |
526 | if (!(res = request_preprocess(call))) |
516 | ipc_call(phone, call); |
527 | ipc_call(phone, call); |
517 | else |
528 | else |
518 | ipc_backsend_err(phone, call, res); |
529 | ipc_backsend_err(phone, call, res); |
519 | 530 | ||
520 | return (unative_t) call; |
531 | return (unative_t) call; |
521 | } |
532 | } |
522 | 533 | ||
523 | /** Forward a received call to another destination. |
534 | /** Forward a received call to another destination. |
524 | * |
535 | * |
525 | * @param callid Hash of the call to forward. |
536 | * @param callid Hash of the call to forward. |
526 | * @param phoneid Phone handle to use for forwarding. |
537 | * @param phoneid Phone handle to use for forwarding. |
527 | * @param method New method to use for the forwarded call. |
538 | * @param method New method to use for the forwarded call. |
528 | * @param arg1 New value of the first argument for the forwarded call. |
539 | * @param arg1 New value of the first argument for the forwarded call. |
529 | * |
540 | * |
530 | * @return Return 0 on succes, otherwise return an error code. |
541 | * @return Return 0 on succes, otherwise return an error code. |
531 | * |
542 | * |
532 | * In case the original method is a system method, ARG1 and ARG2 are overwritten |
543 | * In case the original method is a system method, ARG1 and ARG2 are overwritten |
533 | * in the forwarded message with the new method and the new arg1, respectively. |
544 | * in the forwarded message with the new method and the new arg1, respectively. |
534 | * Otherwise the METHOD and ARG1 are rewritten with the new method and arg1, |
545 | * Otherwise the METHOD and ARG1 are rewritten with the new method and arg1, |
535 | * respectively. Also note there is a set of immutable methods, for which the |
546 | * respectively. Also note there is a set of immutable methods, for which the |
536 | * new method and argument is not set and these values are ignored. |
547 | * new method and argument is not set and these values are ignored. |
537 | * |
548 | * |
538 | * Warning: If implementing non-fast version, make sure that |
549 | * Warning: If implementing non-fast version, make sure that |
539 | * ARG3 is not rewritten for certain system IPC |
550 | * ARG3 is not rewritten for certain system IPC |
540 | */ |
551 | */ |
541 | unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid, |
552 | unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid, |
542 | unative_t method, unative_t arg1) |
553 | unative_t method, unative_t arg1) |
543 | { |
554 | { |
544 | call_t *call; |
555 | call_t *call; |
545 | phone_t *phone; |
556 | phone_t *phone; |
546 | 557 | ||
547 | call = get_call(callid); |
558 | call = get_call(callid); |
548 | if (!call) |
559 | if (!call) |
549 | return ENOENT; |
560 | return ENOENT; |
550 | 561 | ||
551 | call->flags |= IPC_CALL_FORWARDED; |
562 | call->flags |= IPC_CALL_FORWARDED; |
552 | 563 | ||
553 | GET_CHECK_PHONE(phone, phoneid, { |
564 | GET_CHECK_PHONE(phone, phoneid, { |
554 | IPC_SET_RETVAL(call->data, EFORWARD); |
565 | IPC_SET_RETVAL(call->data, EFORWARD); |
555 | ipc_answer(&TASK->answerbox, call); |
566 | ipc_answer(&TASK->answerbox, call); |
556 | return ENOENT; |
567 | return ENOENT; |
557 | }); |
568 | }); |
558 | 569 | ||
559 | if (!method_is_forwardable(IPC_GET_METHOD(call->data))) { |
570 | if (!method_is_forwardable(IPC_GET_METHOD(call->data))) { |
560 | IPC_SET_RETVAL(call->data, EFORWARD); |
571 | IPC_SET_RETVAL(call->data, EFORWARD); |
561 | ipc_answer(&TASK->answerbox, call); |
572 | ipc_answer(&TASK->answerbox, call); |
562 | return EPERM; |
573 | return EPERM; |
563 | } |
574 | } |
564 | 575 | ||
565 | /* |
576 | /* |
566 | * Userspace is not allowed to change method of system methods on |
577 | * Userspace is not allowed to change method of system methods on |
567 | * forward, allow changing ARG1 and ARG2 by means of method and arg1. |
578 | * forward, allow changing ARG1 and ARG2 by means of method and arg1. |
568 | * If the method is immutable, don't change anything. |
579 | * If the method is immutable, don't change anything. |
569 | */ |
580 | */ |
570 | if (!method_is_immutable(IPC_GET_METHOD(call->data))) { |
581 | if (!method_is_immutable(IPC_GET_METHOD(call->data))) { |
571 | if (method_is_system(IPC_GET_METHOD(call->data))) { |
582 | if (method_is_system(IPC_GET_METHOD(call->data))) { |
572 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
583 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
573 | phone_dealloc(IPC_GET_ARG3(call->data)); |
584 | phone_dealloc(IPC_GET_ARG3(call->data)); |
574 | 585 | ||
575 | IPC_SET_ARG1(call->data, method); |
586 | IPC_SET_ARG1(call->data, method); |
576 | IPC_SET_ARG2(call->data, arg1); |
587 | IPC_SET_ARG2(call->data, arg1); |
577 | } else { |
588 | } else { |
578 | IPC_SET_METHOD(call->data, method); |
589 | IPC_SET_METHOD(call->data, method); |
579 | IPC_SET_ARG1(call->data, arg1); |
590 | IPC_SET_ARG1(call->data, arg1); |
580 | } |
591 | } |
581 | } |
592 | } |
582 | 593 | ||
583 | return ipc_forward(call, phone, &TASK->answerbox); |
594 | return ipc_forward(call, phone, &TASK->answerbox); |
584 | } |
595 | } |
585 | 596 | ||
586 | /** Answer an IPC call - fast version. |
597 | /** Answer an IPC call - fast version. |
587 | * |
598 | * |
588 | * This function can handle only two return arguments of payload, but is faster |
599 | * This function can handle only two return arguments of payload, but is faster |
589 | * than the generic sys_ipc_answer(). |
600 | * than the generic sys_ipc_answer(). |
590 | * |
601 | * |
591 | * @param callid Hash of the call to be answered. |
602 | * @param callid Hash of the call to be answered. |
592 | * @param retval Return value of the answer. |
603 | * @param retval Return value of the answer. |
593 | * @param arg1 Service-defined return value. |
604 | * @param arg1 Service-defined return value. |
594 | * @param arg2 Service-defined return value. |
605 | * @param arg2 Service-defined return value. |
595 | * @param arg3 Service-defined return value. |
606 | * @param arg3 Service-defined return value. |
596 | * @param arg4 Service-defined return value. |
607 | * @param arg4 Service-defined return value. |
597 | * |
608 | * |
598 | * @return Return 0 on success, otherwise return an error code. |
609 | * @return Return 0 on success, otherwise return an error code. |
599 | */ |
610 | */ |
600 | unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, |
611 | unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, |
601 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
612 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
602 | { |
613 | { |
603 | call_t *call; |
614 | call_t *call; |
604 | ipc_data_t saved_data; |
615 | ipc_data_t saved_data; |
605 | int saveddata = 0; |
616 | int saveddata = 0; |
606 | int rc; |
617 | int rc; |
607 | 618 | ||
608 | /* Do not answer notification callids */ |
619 | /* Do not answer notification callids */ |
609 | if (callid & IPC_CALLID_NOTIFICATION) |
620 | if (callid & IPC_CALLID_NOTIFICATION) |
610 | return 0; |
621 | return 0; |
611 | 622 | ||
612 | call = get_call(callid); |
623 | call = get_call(callid); |
613 | if (!call) |
624 | if (!call) |
614 | return ENOENT; |
625 | return ENOENT; |
615 | 626 | ||
616 | if (answer_need_old(call)) { |
627 | if (answer_need_old(call)) { |
617 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
628 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
618 | saveddata = 1; |
629 | saveddata = 1; |
619 | } |
630 | } |
620 | 631 | ||
621 | IPC_SET_RETVAL(call->data, retval); |
632 | IPC_SET_RETVAL(call->data, retval); |
622 | IPC_SET_ARG1(call->data, arg1); |
633 | IPC_SET_ARG1(call->data, arg1); |
623 | IPC_SET_ARG2(call->data, arg2); |
634 | IPC_SET_ARG2(call->data, arg2); |
624 | IPC_SET_ARG3(call->data, arg3); |
635 | IPC_SET_ARG3(call->data, arg3); |
625 | IPC_SET_ARG4(call->data, arg4); |
636 | IPC_SET_ARG4(call->data, arg4); |
- | 637 | /* |
|
- | 638 | * To achieve deterministic behavior, zero out arguments that are beyond |
|
- | 639 | * the limits of the fast version. |
|
- | 640 | */ |
|
- | 641 | IPC_SET_ARG5(call->data, 0); |
|
626 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
642 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
627 | 643 | ||
628 | ipc_answer(&TASK->answerbox, call); |
644 | ipc_answer(&TASK->answerbox, call); |
629 | return rc; |
645 | return rc; |
630 | } |
646 | } |
631 | 647 | ||
632 | /** Answer an IPC call. |
648 | /** Answer an IPC call. |
633 | * |
649 | * |
634 | * @param callid Hash of the call to be answered. |
650 | * @param callid Hash of the call to be answered. |
635 | * @param data Userspace address of call data with the answer. |
651 | * @param data Userspace address of call data with the answer. |
636 | * |
652 | * |
637 | * @return Return 0 on success, otherwise return an error code. |
653 | * @return Return 0 on success, otherwise return an error code. |
638 | */ |
654 | */ |
639 | unative_t sys_ipc_answer_slow(unative_t callid, ipc_data_t *data) |
655 | unative_t sys_ipc_answer_slow(unative_t callid, ipc_data_t *data) |
640 | { |
656 | { |
641 | call_t *call; |
657 | call_t *call; |
642 | ipc_data_t saved_data; |
658 | ipc_data_t saved_data; |
643 | int saveddata = 0; |
659 | int saveddata = 0; |
644 | int rc; |
660 | int rc; |
645 | 661 | ||
646 | /* Do not answer notification callids */ |
662 | /* Do not answer notification callids */ |
647 | if (callid & IPC_CALLID_NOTIFICATION) |
663 | if (callid & IPC_CALLID_NOTIFICATION) |
648 | return 0; |
664 | return 0; |
649 | 665 | ||
650 | call = get_call(callid); |
666 | call = get_call(callid); |
651 | if (!call) |
667 | if (!call) |
652 | return ENOENT; |
668 | return ENOENT; |
653 | 669 | ||
654 | if (answer_need_old(call)) { |
670 | if (answer_need_old(call)) { |
655 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
671 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
656 | saveddata = 1; |
672 | saveddata = 1; |
657 | } |
673 | } |
658 | rc = copy_from_uspace(&call->data.args, &data->args, |
674 | rc = copy_from_uspace(&call->data.args, &data->args, |
659 | sizeof(call->data.args)); |
675 | sizeof(call->data.args)); |
660 | if (rc != 0) |
676 | if (rc != 0) |
661 | return rc; |
677 | return rc; |
662 | 678 | ||
663 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
679 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
664 | 680 | ||
665 | ipc_answer(&TASK->answerbox, call); |
681 | ipc_answer(&TASK->answerbox, call); |
666 | 682 | ||
667 | return rc; |
683 | return rc; |
668 | } |
684 | } |
669 | 685 | ||
670 | /** Hang up a phone. |
686 | /** Hang up a phone. |
671 | * |
687 | * |
672 | * @param Phone handle of the phone to be hung up. |
688 | * @param Phone handle of the phone to be hung up. |
673 | * |
689 | * |
674 | * @return Return 0 on success or an error code. |
690 | * @return Return 0 on success or an error code. |
675 | */ |
691 | */ |
676 | unative_t sys_ipc_hangup(int phoneid) |
692 | unative_t sys_ipc_hangup(int phoneid) |
677 | { |
693 | { |
678 | phone_t *phone; |
694 | phone_t *phone; |
679 | 695 | ||
680 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
696 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
681 | 697 | ||
682 | if (ipc_phone_hangup(phone)) |
698 | if (ipc_phone_hangup(phone)) |
683 | return -1; |
699 | return -1; |
684 | 700 | ||
685 | return 0; |
701 | return 0; |
686 | } |
702 | } |
687 | 703 | ||
688 | /** Wait for an incoming IPC call or an answer. |
704 | /** Wait for an incoming IPC call or an answer. |
689 | * |
705 | * |
690 | * @param calldata Pointer to buffer where the call/answer data is stored. |
706 | * @param calldata Pointer to buffer where the call/answer data is stored. |
691 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
707 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
692 | * @param flags Select mode of sleep operation. See waitq_sleep_timeout() |
708 | * @param flags Select mode of sleep operation. See waitq_sleep_timeout() |
693 | * for explanation. |
709 | * for explanation. |
694 | * |
710 | * |
695 | * @return Hash of the call. |
711 | * @return Hash of the call. |
696 | * If IPC_CALLID_NOTIFICATION bit is set in the hash, the |
712 | * If IPC_CALLID_NOTIFICATION bit is set in the hash, the |
697 | * call is a notification. IPC_CALLID_ANSWERED denotes an |
713 | * call is a notification. IPC_CALLID_ANSWERED denotes an |
698 | * answer. |
714 | * answer. |
699 | */ |
715 | */ |
700 | unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags) |
716 | unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags) |
701 | { |
717 | { |
702 | call_t *call; |
718 | call_t *call; |
703 | 719 | ||
704 | restart: |
720 | restart: |
705 | call = ipc_wait_for_call(&TASK->answerbox, usec, |
721 | call = ipc_wait_for_call(&TASK->answerbox, usec, |
706 | flags | SYNCH_FLAGS_INTERRUPTIBLE); |
722 | flags | SYNCH_FLAGS_INTERRUPTIBLE); |
707 | if (!call) |
723 | if (!call) |
708 | return 0; |
724 | return 0; |
709 | 725 | ||
710 | if (call->flags & IPC_CALL_NOTIF) { |
726 | if (call->flags & IPC_CALL_NOTIF) { |
711 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
727 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
712 | 728 | ||
713 | /* Set in_phone_hash to the interrupt counter */ |
729 | /* Set in_phone_hash to the interrupt counter */ |
714 | call->data.phone = (void *) call->priv; |
730 | call->data.phone = (void *) call->priv; |
715 | 731 | ||
716 | STRUCT_TO_USPACE(calldata, &call->data); |
732 | STRUCT_TO_USPACE(calldata, &call->data); |
717 | 733 | ||
718 | ipc_call_free(call); |
734 | ipc_call_free(call); |
719 | 735 | ||
720 | return ((unative_t) call) | IPC_CALLID_NOTIFICATION; |
736 | return ((unative_t) call) | IPC_CALLID_NOTIFICATION; |
721 | } |
737 | } |
722 | 738 | ||
723 | if (call->flags & IPC_CALL_ANSWERED) { |
739 | if (call->flags & IPC_CALL_ANSWERED) { |
724 | process_answer(call); |
740 | process_answer(call); |
725 | 741 | ||
726 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
742 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
727 | 743 | ||
728 | atomic_dec(&TASK->active_calls); |
744 | atomic_dec(&TASK->active_calls); |
729 | 745 | ||
730 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
746 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
731 | ipc_call_free(call); |
747 | ipc_call_free(call); |
732 | goto restart; |
748 | goto restart; |
733 | } |
749 | } |
734 | 750 | ||
735 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
751 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
736 | ipc_call_free(call); |
752 | ipc_call_free(call); |
737 | 753 | ||
738 | return ((unative_t) call) | IPC_CALLID_ANSWERED; |
754 | return ((unative_t) call) | IPC_CALLID_ANSWERED; |
739 | } |
755 | } |
740 | 756 | ||
741 | if (process_request(&TASK->answerbox, call)) |
757 | if (process_request(&TASK->answerbox, call)) |
742 | goto restart; |
758 | goto restart; |
743 | 759 | ||
744 | /* Include phone address('id') of the caller in the request, |
760 | /* Include phone address('id') of the caller in the request, |
745 | * copy whole call->data, not only call->data.args */ |
761 | * copy whole call->data, not only call->data.args */ |
746 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
762 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
747 | return 0; |
763 | return 0; |
748 | } |
764 | } |
749 | return (unative_t)call; |
765 | return (unative_t)call; |
750 | } |
766 | } |
751 | 767 | ||
752 | /** Connect an IRQ handler to a task. |
768 | /** Connect an IRQ handler to a task. |
753 | * |
769 | * |
754 | * @param inr IRQ number. |
770 | * @param inr IRQ number. |
755 | * @param devno Device number. |
771 | * @param devno Device number. |
756 | * @param method Method to be associated with the notification. |
772 | * @param method Method to be associated with the notification. |
757 | * @param ucode Uspace pointer to the top-half pseudocode. |
773 | * @param ucode Uspace pointer to the top-half pseudocode. |
758 | * |
774 | * |
759 | * @return EPERM or a return code returned by ipc_irq_register(). |
775 | * @return EPERM or a return code returned by ipc_irq_register(). |
760 | */ |
776 | */ |
761 | unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method, |
777 | unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method, |
762 | irq_code_t *ucode) |
778 | irq_code_t *ucode) |
763 | { |
779 | { |
764 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
780 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
765 | return EPERM; |
781 | return EPERM; |
766 | 782 | ||
767 | return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode); |
783 | return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode); |
768 | } |
784 | } |
769 | 785 | ||
770 | /** Disconnect an IRQ handler from a task. |
786 | /** Disconnect an IRQ handler from a task. |
771 | * |
787 | * |
772 | * @param inr IRQ number. |
788 | * @param inr IRQ number. |
773 | * @param devno Device number. |
789 | * @param devno Device number. |
774 | * |
790 | * |
775 | * @return Zero on success or EPERM on error.. |
791 | * @return Zero on success or EPERM on error.. |
776 | */ |
792 | */ |
777 | unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno) |
793 | unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno) |
778 | { |
794 | { |
779 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
795 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
780 | return EPERM; |
796 | return EPERM; |
781 | 797 | ||
782 | ipc_irq_unregister(&TASK->answerbox, inr, devno); |
798 | ipc_irq_unregister(&TASK->answerbox, inr, devno); |
783 | 799 | ||
784 | return 0; |
800 | return 0; |
785 | } |
801 | } |
786 | 802 | ||
787 | /** @} |
803 | /** @} |
788 | */ |
804 | */ |
789 | 805 |