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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 <ipc/kbox.h> |
45 | #include <ipc/kbox.h> |
46 | #include <udebug/udebug_ipc.h> |
46 | #include <udebug/udebug_ipc.h> |
47 | #include <arch/interrupt.h> |
47 | #include <arch/interrupt.h> |
48 | #include <syscall/copy.h> |
48 | #include <syscall/copy.h> |
49 | #include <security/cap.h> |
49 | #include <security/cap.h> |
50 | #include <mm/as.h> |
50 | #include <mm/as.h> |
51 | #include <print.h> |
51 | #include <print.h> |
52 | 52 | ||
53 | /** |
53 | /** |
54 | * Maximum buffer size allowed for IPC_M_DATA_WRITE and IPC_M_DATA_READ |
54 | * Maximum buffer size allowed for IPC_M_DATA_WRITE and IPC_M_DATA_READ |
55 | * requests. |
55 | * requests. |
56 | */ |
56 | */ |
57 | #define DATA_XFER_LIMIT (64 * 1024) |
57 | #define DATA_XFER_LIMIT (64 * 1024) |
58 | 58 | ||
59 | #define GET_CHECK_PHONE(phone, phoneid, err) \ |
59 | #define GET_CHECK_PHONE(phone, phoneid, err) \ |
60 | { \ |
60 | { \ |
61 | if (phoneid > IPC_MAX_PHONES) { \ |
61 | if (phoneid > IPC_MAX_PHONES) { \ |
62 | err; \ |
62 | err; \ |
63 | } \ |
63 | } \ |
64 | phone = &TASK->phones[phoneid]; \ |
64 | phone = &TASK->phones[phoneid]; \ |
65 | } |
65 | } |
66 | 66 | ||
67 | #define STRUCT_TO_USPACE(dst, src) copy_to_uspace(dst, src, sizeof(*(src))) |
67 | #define STRUCT_TO_USPACE(dst, src) copy_to_uspace(dst, src, sizeof(*(src))) |
68 | 68 | ||
69 | /** Decide if the method is a system method. |
69 | /** Decide if the method is a system method. |
70 | * |
70 | * |
71 | * @param method Method to be decided. |
71 | * @param method Method to be decided. |
72 | * |
72 | * |
73 | * @return Return 1 if the method is a system method. |
73 | * @return Return 1 if the method is a system method. |
74 | * Otherwise return 0. |
74 | * Otherwise return 0. |
75 | */ |
75 | */ |
76 | static inline int method_is_system(unative_t method) |
76 | static inline int method_is_system(unative_t method) |
77 | { |
77 | { |
78 | if (method <= IPC_M_LAST_SYSTEM) |
78 | if (method <= IPC_M_LAST_SYSTEM) |
79 | return 1; |
79 | return 1; |
80 | return 0; |
80 | return 0; |
81 | } |
81 | } |
82 | 82 | ||
83 | /** Decide if the message with this method is forwardable. |
83 | /** Decide if the message with this method is forwardable. |
84 | * |
84 | * |
85 | * - some system messages may be forwarded, for some of them |
85 | * - some system messages may be forwarded, for some of them |
86 | * it is useless |
86 | * it is useless |
87 | * |
87 | * |
88 | * @param method Method to be decided. |
88 | * @param method Method to be decided. |
89 | * |
89 | * |
90 | * @return Return 1 if the method is forwardable. |
90 | * @return Return 1 if the method is forwardable. |
91 | * Otherwise return 0. |
91 | * Otherwise return 0. |
92 | */ |
92 | */ |
93 | static inline int method_is_forwardable(unative_t method) |
93 | static inline int method_is_forwardable(unative_t method) |
94 | { |
94 | { |
95 | switch (method) { |
95 | switch (method) { |
96 | case IPC_M_PHONE_HUNGUP: |
96 | case IPC_M_PHONE_HUNGUP: |
97 | /* This message is meant only for the original recipient. */ |
97 | /* This message is meant only for the original recipient. */ |
98 | return 0; |
98 | return 0; |
99 | default: |
99 | default: |
100 | return 1; |
100 | return 1; |
101 | } |
101 | } |
102 | } |
102 | } |
103 | 103 | ||
104 | /** Decide if the message with this method is immutable on forward. |
104 | /** Decide if the message with this method is immutable on forward. |
105 | * |
105 | * |
106 | * - some system messages may be forwarded but their content cannot be altered |
106 | * - some system messages may be forwarded but their content cannot be altered |
107 | * |
107 | * |
108 | * @param method Method to be decided. |
108 | * @param method Method to be decided. |
109 | * |
109 | * |
110 | * @return Return 1 if the method is immutable on forward. |
110 | * @return Return 1 if the method is immutable on forward. |
111 | * Otherwise return 0. |
111 | * Otherwise return 0. |
112 | */ |
112 | */ |
113 | static inline int method_is_immutable(unative_t method) |
113 | static inline int method_is_immutable(unative_t method) |
114 | { |
114 | { |
115 | switch (method) { |
115 | switch (method) { |
116 | case IPC_M_SHARE_OUT: |
116 | case IPC_M_SHARE_OUT: |
117 | case IPC_M_SHARE_IN: |
117 | case IPC_M_SHARE_IN: |
118 | case IPC_M_DATA_WRITE: |
118 | case IPC_M_DATA_WRITE: |
119 | case IPC_M_DATA_READ: |
119 | case IPC_M_DATA_READ: |
120 | return 1; |
120 | return 1; |
121 | break; |
121 | break; |
122 | default: |
122 | default: |
123 | return 0; |
123 | return 0; |
124 | } |
124 | } |
125 | } |
125 | } |
126 | 126 | ||
127 | 127 | ||
128 | /*********************************************************************** |
128 | /*********************************************************************** |
129 | * Functions that preprocess answer before sending it to the recepient. |
129 | * Functions that preprocess answer before sending it to the recepient. |
130 | ***********************************************************************/ |
130 | ***********************************************************************/ |
131 | 131 | ||
132 | /** Decide if the caller (e.g. ipc_answer()) should save the old call contents |
132 | /** Decide if the caller (e.g. ipc_answer()) should save the old call contents |
133 | * for answer_preprocess(). |
133 | * for answer_preprocess(). |
134 | * |
134 | * |
135 | * @param call Call structure to be decided. |
135 | * @param call Call structure to be decided. |
136 | * |
136 | * |
137 | * @return Return 1 if the old call contents should be saved. |
137 | * @return Return 1 if the old call contents should be saved. |
138 | * Return 0 otherwise. |
138 | * Return 0 otherwise. |
139 | */ |
139 | */ |
140 | static inline int answer_need_old(call_t *call) |
140 | static inline int answer_need_old(call_t *call) |
141 | { |
141 | { |
142 | switch (IPC_GET_METHOD(call->data)) { |
142 | switch (IPC_GET_METHOD(call->data)) { |
143 | case IPC_M_CONNECT_TO_ME: |
143 | case IPC_M_CONNECT_TO_ME: |
144 | case IPC_M_CONNECT_ME_TO: |
144 | case IPC_M_CONNECT_ME_TO: |
145 | case IPC_M_SHARE_OUT: |
145 | case IPC_M_SHARE_OUT: |
146 | case IPC_M_SHARE_IN: |
146 | case IPC_M_SHARE_IN: |
147 | case IPC_M_DATA_WRITE: |
147 | case IPC_M_DATA_WRITE: |
148 | case IPC_M_DATA_READ: |
148 | case IPC_M_DATA_READ: |
149 | return 1; |
149 | return 1; |
150 | default: |
150 | default: |
151 | return 0; |
151 | return 0; |
152 | } |
152 | } |
153 | } |
153 | } |
154 | 154 | ||
155 | /** Interpret process answer as control information. |
155 | /** Interpret process answer as control information. |
156 | * |
156 | * |
157 | * This function is called directly after sys_ipc_answer(). |
157 | * This function is called directly after sys_ipc_answer(). |
158 | * |
158 | * |
159 | * @param answer Call structure with the answer. |
159 | * @param answer Call structure with the answer. |
160 | * @param olddata Saved data of the request. |
160 | * @param olddata Saved data of the request. |
161 | * |
161 | * |
162 | * @return Return 0 on success or an error code. |
162 | * @return Return 0 on success or an error code. |
163 | */ |
163 | */ |
164 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
164 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
165 | { |
165 | { |
166 | int phoneid; |
166 | int phoneid; |
167 | 167 | ||
168 | if ((native_t) IPC_GET_RETVAL(answer->data) == EHANGUP) { |
168 | if ((native_t) IPC_GET_RETVAL(answer->data) == EHANGUP) { |
169 | /* In case of forward, hangup the forwared phone, |
169 | /* In case of forward, hangup the forwared phone, |
170 | * not the originator |
170 | * not the originator |
171 | */ |
171 | */ |
172 | mutex_lock(&answer->data.phone->lock); |
172 | mutex_lock(&answer->data.phone->lock); |
173 | spinlock_lock(&TASK->answerbox.lock); |
173 | spinlock_lock(&TASK->answerbox.lock); |
174 | if (answer->data.phone->state == IPC_PHONE_CONNECTED) { |
174 | if (answer->data.phone->state == IPC_PHONE_CONNECTED) { |
175 | list_remove(&answer->data.phone->link); |
175 | list_remove(&answer->data.phone->link); |
176 | answer->data.phone->state = IPC_PHONE_SLAMMED; |
176 | answer->data.phone->state = IPC_PHONE_SLAMMED; |
177 | } |
177 | } |
178 | spinlock_unlock(&TASK->answerbox.lock); |
178 | spinlock_unlock(&TASK->answerbox.lock); |
179 | mutex_unlock(&answer->data.phone->lock); |
179 | mutex_unlock(&answer->data.phone->lock); |
180 | } |
180 | } |
181 | 181 | ||
182 | if (!olddata) |
182 | if (!olddata) |
183 | return 0; |
183 | return 0; |
184 | 184 | ||
185 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
185 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
186 | phoneid = IPC_GET_ARG5(*olddata); |
186 | phoneid = IPC_GET_ARG5(*olddata); |
187 | if (IPC_GET_RETVAL(answer->data)) { |
187 | if (IPC_GET_RETVAL(answer->data)) { |
188 | /* The connection was not accepted */ |
188 | /* The connection was not accepted */ |
189 | phone_dealloc(phoneid); |
189 | phone_dealloc(phoneid); |
190 | } else { |
190 | } else { |
191 | /* The connection was accepted */ |
191 | /* The connection was accepted */ |
192 | phone_connect(phoneid, &answer->sender->answerbox); |
192 | phone_connect(phoneid, &answer->sender->answerbox); |
193 | /* Set 'phone hash' as arg5 of response */ |
193 | /* Set 'phone hash' as arg5 of response */ |
194 | IPC_SET_ARG5(answer->data, |
194 | IPC_SET_ARG5(answer->data, |
195 | (unative_t) &TASK->phones[phoneid]); |
195 | (unative_t) &TASK->phones[phoneid]); |
196 | } |
196 | } |
197 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
197 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
198 | /* If the users accepted call, connect */ |
198 | /* If the users accepted call, connect */ |
199 | if (!IPC_GET_RETVAL(answer->data)) { |
199 | if (!IPC_GET_RETVAL(answer->data)) { |
200 | ipc_phone_connect((phone_t *) IPC_GET_ARG5(*olddata), |
200 | ipc_phone_connect((phone_t *) IPC_GET_ARG5(*olddata), |
201 | &TASK->answerbox); |
201 | &TASK->answerbox); |
202 | } |
202 | } |
203 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_OUT) { |
203 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_OUT) { |
204 | if (!IPC_GET_RETVAL(answer->data)) { |
204 | if (!IPC_GET_RETVAL(answer->data)) { |
205 | /* Accepted, handle as_area receipt */ |
205 | /* Accepted, handle as_area receipt */ |
206 | ipl_t ipl; |
206 | ipl_t ipl; |
207 | int rc; |
207 | int rc; |
208 | as_t *as; |
208 | as_t *as; |
209 | 209 | ||
210 | ipl = interrupts_disable(); |
210 | ipl = interrupts_disable(); |
211 | spinlock_lock(&answer->sender->lock); |
211 | spinlock_lock(&answer->sender->lock); |
212 | as = answer->sender->as; |
212 | as = answer->sender->as; |
213 | spinlock_unlock(&answer->sender->lock); |
213 | spinlock_unlock(&answer->sender->lock); |
214 | interrupts_restore(ipl); |
214 | interrupts_restore(ipl); |
215 | 215 | ||
216 | rc = as_area_share(as, IPC_GET_ARG1(*olddata), |
216 | rc = as_area_share(as, IPC_GET_ARG1(*olddata), |
217 | IPC_GET_ARG2(*olddata), AS, |
217 | IPC_GET_ARG2(*olddata), AS, |
218 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
218 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
219 | IPC_SET_RETVAL(answer->data, rc); |
219 | IPC_SET_RETVAL(answer->data, rc); |
220 | return rc; |
220 | return rc; |
221 | } |
221 | } |
222 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_IN) { |
222 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_IN) { |
223 | if (!IPC_GET_RETVAL(answer->data)) { |
223 | if (!IPC_GET_RETVAL(answer->data)) { |
224 | ipl_t ipl; |
224 | ipl_t ipl; |
225 | as_t *as; |
225 | as_t *as; |
226 | int rc; |
226 | int rc; |
227 | 227 | ||
228 | ipl = interrupts_disable(); |
228 | ipl = interrupts_disable(); |
229 | spinlock_lock(&answer->sender->lock); |
229 | spinlock_lock(&answer->sender->lock); |
230 | as = answer->sender->as; |
230 | as = answer->sender->as; |
231 | spinlock_unlock(&answer->sender->lock); |
231 | spinlock_unlock(&answer->sender->lock); |
232 | interrupts_restore(ipl); |
232 | interrupts_restore(ipl); |
233 | 233 | ||
234 | rc = as_area_share(AS, IPC_GET_ARG1(answer->data), |
234 | rc = as_area_share(AS, IPC_GET_ARG1(answer->data), |
235 | IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata), |
235 | IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata), |
236 | IPC_GET_ARG2(answer->data)); |
236 | IPC_GET_ARG2(answer->data)); |
237 | IPC_SET_RETVAL(answer->data, rc); |
237 | IPC_SET_RETVAL(answer->data, rc); |
238 | } |
238 | } |
239 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_READ) { |
239 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_READ) { |
240 | ASSERT(!answer->buffer); |
240 | ASSERT(!answer->buffer); |
241 | if (!IPC_GET_RETVAL(answer->data)) { |
241 | if (!IPC_GET_RETVAL(answer->data)) { |
242 | /* The recipient agreed to send data. */ |
242 | /* The recipient agreed to send data. */ |
243 | uintptr_t src = IPC_GET_ARG1(answer->data); |
243 | uintptr_t src = IPC_GET_ARG1(answer->data); |
244 | uintptr_t dst = IPC_GET_ARG1(*olddata); |
244 | uintptr_t dst = IPC_GET_ARG1(*olddata); |
245 | size_t max_size = IPC_GET_ARG2(*olddata); |
245 | size_t max_size = IPC_GET_ARG2(*olddata); |
246 | size_t size = IPC_GET_ARG2(answer->data); |
246 | size_t size = IPC_GET_ARG2(answer->data); |
247 | if (size && size <= max_size) { |
247 | if (size && size <= max_size) { |
248 | /* |
248 | /* |
249 | * Copy the destination VA so that this piece of |
249 | * Copy the destination VA so that this piece of |
250 | * information is not lost. |
250 | * information is not lost. |
251 | */ |
251 | */ |
252 | IPC_SET_ARG1(answer->data, dst); |
252 | IPC_SET_ARG1(answer->data, dst); |
253 | 253 | ||
254 | answer->buffer = malloc(size, 0); |
254 | answer->buffer = malloc(size, 0); |
255 | int rc = copy_from_uspace(answer->buffer, |
255 | int rc = copy_from_uspace(answer->buffer, |
256 | (void *) src, size); |
256 | (void *) src, size); |
257 | if (rc) { |
257 | if (rc) { |
258 | IPC_SET_RETVAL(answer->data, rc); |
258 | IPC_SET_RETVAL(answer->data, rc); |
259 | free(answer->buffer); |
259 | free(answer->buffer); |
260 | answer->buffer = NULL; |
260 | answer->buffer = NULL; |
261 | } |
261 | } |
262 | } else if (!size) { |
262 | } else if (!size) { |
263 | IPC_SET_RETVAL(answer->data, EOK); |
263 | IPC_SET_RETVAL(answer->data, EOK); |
264 | } else { |
264 | } else { |
265 | IPC_SET_RETVAL(answer->data, ELIMIT); |
265 | IPC_SET_RETVAL(answer->data, ELIMIT); |
266 | } |
266 | } |
267 | } |
267 | } |
268 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_WRITE) { |
268 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_WRITE) { |
269 | ASSERT(answer->buffer); |
269 | ASSERT(answer->buffer); |
270 | if (!IPC_GET_RETVAL(answer->data)) { |
270 | if (!IPC_GET_RETVAL(answer->data)) { |
271 | /* The recipient agreed to receive data. */ |
271 | /* The recipient agreed to receive data. */ |
272 | int rc; |
272 | int rc; |
273 | uintptr_t dst; |
273 | uintptr_t dst; |
274 | size_t size; |
274 | size_t size; |
275 | size_t max_size; |
275 | size_t max_size; |
276 | 276 | ||
277 | dst = (uintptr_t)IPC_GET_ARG1(answer->data); |
277 | dst = (uintptr_t)IPC_GET_ARG1(answer->data); |
278 | size = (size_t)IPC_GET_ARG2(answer->data); |
278 | size = (size_t)IPC_GET_ARG2(answer->data); |
279 | max_size = (size_t)IPC_GET_ARG2(*olddata); |
279 | max_size = (size_t)IPC_GET_ARG2(*olddata); |
280 | 280 | ||
281 | if (size <= max_size) { |
281 | if (size <= max_size) { |
282 | rc = copy_to_uspace((void *) dst, |
282 | rc = copy_to_uspace((void *) dst, |
283 | answer->buffer, size); |
283 | answer->buffer, size); |
284 | if (rc) |
284 | if (rc) |
285 | IPC_SET_RETVAL(answer->data, rc); |
285 | IPC_SET_RETVAL(answer->data, rc); |
286 | } else { |
286 | } else { |
287 | IPC_SET_RETVAL(answer->data, ELIMIT); |
287 | IPC_SET_RETVAL(answer->data, ELIMIT); |
288 | } |
288 | } |
289 | } |
289 | } |
290 | free(answer->buffer); |
290 | free(answer->buffer); |
291 | answer->buffer = NULL; |
291 | answer->buffer = NULL; |
292 | } |
292 | } |
293 | return 0; |
293 | return 0; |
294 | } |
294 | } |
295 | 295 | ||
296 | /** Called before the request is sent. |
296 | /** Called before the request is sent. |
297 | * |
297 | * |
298 | * @param call Call structure with the request. |
298 | * @param call Call structure with the request. |
299 | * @param phone Phone that the call will be sent through. |
299 | * @param phone Phone that the call will be sent through. |
300 | * |
300 | * |
301 | * @return Return 0 on success, ELIMIT or EPERM on error. |
301 | * @return Return 0 on success, ELIMIT or EPERM on error. |
302 | */ |
302 | */ |
303 | static int request_preprocess(call_t *call, phone_t *phone) |
303 | static int request_preprocess(call_t *call, phone_t *phone) |
304 | { |
304 | { |
305 | int newphid; |
305 | int newphid; |
306 | size_t size; |
306 | size_t size; |
307 | uintptr_t src; |
307 | uintptr_t src; |
308 | int rc; |
308 | int rc; |
309 | 309 | ||
310 | switch (IPC_GET_METHOD(call->data)) { |
310 | switch (IPC_GET_METHOD(call->data)) { |
311 | case IPC_M_CONNECT_ME_TO: |
311 | case IPC_M_CONNECT_ME_TO: |
312 | newphid = phone_alloc(); |
312 | newphid = phone_alloc(); |
313 | if (newphid < 0) |
313 | if (newphid < 0) |
314 | return ELIMIT; |
314 | return ELIMIT; |
315 | /* Set arg5 for server */ |
315 | /* Set arg5 for server */ |
316 | IPC_SET_ARG5(call->data, (unative_t) &TASK->phones[newphid]); |
316 | IPC_SET_ARG5(call->data, (unative_t) &TASK->phones[newphid]); |
317 | call->flags |= IPC_CALL_CONN_ME_TO; |
317 | call->flags |= IPC_CALL_CONN_ME_TO; |
318 | call->priv = newphid; |
318 | call->priv = newphid; |
319 | break; |
319 | break; |
320 | case IPC_M_SHARE_OUT: |
320 | case IPC_M_SHARE_OUT: |
321 | size = as_area_get_size(IPC_GET_ARG1(call->data)); |
321 | size = as_area_get_size(IPC_GET_ARG1(call->data)); |
322 | if (!size) |
322 | if (!size) |
323 | return EPERM; |
323 | return EPERM; |
324 | IPC_SET_ARG2(call->data, size); |
324 | IPC_SET_ARG2(call->data, size); |
325 | break; |
325 | break; |
326 | case IPC_M_DATA_READ: |
326 | case IPC_M_DATA_READ: |
327 | size = IPC_GET_ARG2(call->data); |
327 | size = IPC_GET_ARG2(call->data); |
328 | if ((size <= 0 || (size > DATA_XFER_LIMIT))) |
328 | if ((size <= 0 || (size > DATA_XFER_LIMIT))) |
329 | return ELIMIT; |
329 | return ELIMIT; |
330 | break; |
330 | break; |
331 | case IPC_M_DATA_WRITE: |
331 | case IPC_M_DATA_WRITE: |
332 | src = IPC_GET_ARG1(call->data); |
332 | src = IPC_GET_ARG1(call->data); |
333 | size = IPC_GET_ARG2(call->data); |
333 | size = IPC_GET_ARG2(call->data); |
334 | 334 | ||
335 | if ((size <= 0) || (size > DATA_XFER_LIMIT)) |
335 | if ((size <= 0) || (size > DATA_XFER_LIMIT)) |
336 | return ELIMIT; |
336 | return ELIMIT; |
337 | 337 | ||
338 | call->buffer = (uint8_t *) malloc(size, 0); |
338 | call->buffer = (uint8_t *) malloc(size, 0); |
339 | rc = copy_from_uspace(call->buffer, (void *) src, size); |
339 | rc = copy_from_uspace(call->buffer, (void *) src, size); |
340 | if (rc != 0) { |
340 | if (rc != 0) { |
341 | free(call->buffer); |
341 | free(call->buffer); |
342 | return rc; |
342 | return rc; |
343 | } |
343 | } |
344 | break; |
344 | break; |
345 | #ifdef CONFIG_UDEBUG |
345 | #ifdef CONFIG_UDEBUG |
346 | case IPC_M_DEBUG_ALL: |
346 | case IPC_M_DEBUG_ALL: |
347 | return udebug_request_preprocess(call, phone); |
347 | return udebug_request_preprocess(call, phone); |
348 | #endif |
348 | #endif |
349 | default: |
349 | default: |
350 | break; |
350 | break; |
351 | } |
351 | } |
352 | return 0; |
352 | return 0; |
353 | } |
353 | } |
354 | 354 | ||
355 | /******************************************************************************* |
355 | /******************************************************************************* |
356 | * Functions called to process received call/answer before passing it to uspace. |
356 | * Functions called to process received call/answer before passing it to uspace. |
357 | *******************************************************************************/ |
357 | *******************************************************************************/ |
358 | 358 | ||
359 | /** Do basic kernel processing of received call answer. |
359 | /** Do basic kernel processing of received call answer. |
360 | * |
360 | * |
361 | * @param call Call structure with the answer. |
361 | * @param call Call structure with the answer. |
362 | */ |
362 | */ |
363 | static void process_answer(call_t *call) |
363 | static void process_answer(call_t *call) |
364 | { |
364 | { |
365 | if (((native_t) IPC_GET_RETVAL(call->data) == EHANGUP) && |
365 | if (((native_t) IPC_GET_RETVAL(call->data) == EHANGUP) && |
366 | (call->flags & IPC_CALL_FORWARDED)) |
366 | (call->flags & IPC_CALL_FORWARDED)) |
367 | IPC_SET_RETVAL(call->data, EFORWARD); |
367 | IPC_SET_RETVAL(call->data, EFORWARD); |
368 | 368 | ||
369 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
369 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
370 | if (IPC_GET_RETVAL(call->data)) |
370 | if (IPC_GET_RETVAL(call->data)) |
371 | phone_dealloc(call->priv); |
371 | phone_dealloc(call->priv); |
372 | else |
372 | else |
373 | IPC_SET_ARG5(call->data, call->priv); |
373 | IPC_SET_ARG5(call->data, call->priv); |
374 | } |
374 | } |
375 | 375 | ||
376 | if (call->buffer) { |
376 | if (call->buffer) { |
377 | /* This must be an affirmative answer to IPC_M_DATA_READ. */ |
377 | /* This must be an affirmative answer to IPC_M_DATA_READ. */ |
378 | /* or IPC_M_DEBUG_ALL/UDEBUG_M_MEM_READ... */ |
378 | /* or IPC_M_DEBUG_ALL/UDEBUG_M_MEM_READ... */ |
379 | uintptr_t dst = IPC_GET_ARG1(call->data); |
379 | uintptr_t dst = IPC_GET_ARG1(call->data); |
380 | size_t size = IPC_GET_ARG2(call->data); |
380 | size_t size = IPC_GET_ARG2(call->data); |
381 | int rc = copy_to_uspace((void *) dst, call->buffer, size); |
381 | int rc = copy_to_uspace((void *) dst, call->buffer, size); |
382 | if (rc) |
382 | if (rc) |
383 | IPC_SET_RETVAL(call->data, rc); |
383 | IPC_SET_RETVAL(call->data, rc); |
384 | free(call->buffer); |
384 | free(call->buffer); |
385 | call->buffer = NULL; |
385 | call->buffer = NULL; |
386 | } |
386 | } |
387 | } |
387 | } |
388 | 388 | ||
389 | /** Do basic kernel processing of received call request. |
389 | /** Do basic kernel processing of received call request. |
390 | * |
390 | * |
391 | * @param box Destination answerbox structure. |
391 | * @param box Destination answerbox structure. |
392 | * @param call Call structure with the request. |
392 | * @param call Call structure with the request. |
393 | * |
393 | * |
394 | * @return Return 0 if the call should be passed to userspace. |
394 | * @return Return 0 if the call should be passed to userspace. |
395 | * Return -1 if the call should be ignored. |
395 | * Return -1 if the call should be ignored. |
396 | */ |
396 | */ |
397 | static int process_request(answerbox_t *box, call_t *call) |
397 | static int process_request(answerbox_t *box, call_t *call) |
398 | { |
398 | { |
399 | int phoneid; |
399 | int phoneid; |
400 | 400 | ||
401 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
401 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
402 | phoneid = phone_alloc(); |
402 | phoneid = phone_alloc(); |
403 | if (phoneid < 0) { /* Failed to allocate phone */ |
403 | if (phoneid < 0) { /* Failed to allocate phone */ |
404 | IPC_SET_RETVAL(call->data, ELIMIT); |
404 | IPC_SET_RETVAL(call->data, ELIMIT); |
405 | ipc_answer(box, call); |
405 | ipc_answer(box, call); |
406 | return -1; |
406 | return -1; |
407 | } |
407 | } |
408 | IPC_SET_ARG5(call->data, phoneid); |
408 | IPC_SET_ARG5(call->data, phoneid); |
409 | } |
409 | } |
410 | switch (IPC_GET_METHOD(call->data)) { |
410 | switch (IPC_GET_METHOD(call->data)) { |
411 | case IPC_M_DEBUG_ALL: |
411 | case IPC_M_DEBUG_ALL: |
412 | return -1; |
412 | return -1; |
413 | default: |
413 | default: |
414 | break; |
414 | break; |
415 | } |
415 | } |
416 | return 0; |
416 | return 0; |
417 | } |
417 | } |
418 | 418 | ||
419 | /** Make a fast call over IPC, wait for reply and return to user. |
419 | /** Make a fast call over IPC, wait for reply and return to user. |
420 | * |
420 | * |
421 | * This function can handle only three arguments of payload, but is faster than |
421 | * This function can handle only three arguments of payload, but is faster than |
422 | * the generic function (i.e. sys_ipc_call_sync_slow()). |
422 | * the generic function (i.e. sys_ipc_call_sync_slow()). |
423 | * |
423 | * |
424 | * @param phoneid Phone handle for the call. |
424 | * @param phoneid Phone handle for the call. |
425 | * @param method Method of the call. |
425 | * @param method Method of the call. |
426 | * @param arg1 Service-defined payload argument. |
426 | * @param arg1 Service-defined payload argument. |
427 | * @param arg2 Service-defined payload argument. |
427 | * @param arg2 Service-defined payload argument. |
428 | * @param arg3 Service-defined payload argument. |
428 | * @param arg3 Service-defined payload argument. |
429 | * @param data Address of userspace structure where the reply call will |
429 | * @param data Address of userspace structure where the reply call will |
430 | * be stored. |
430 | * be stored. |
431 | * |
431 | * |
432 | * @return Returns 0 on success. |
432 | * @return Returns 0 on success. |
433 | * Return ENOENT if there is no such phone handle. |
433 | * Return ENOENT if there is no such phone handle. |
434 | */ |
434 | */ |
435 | unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method, |
435 | unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method, |
436 | unative_t arg1, unative_t arg2, unative_t arg3, ipc_data_t *data) |
436 | unative_t arg1, unative_t arg2, unative_t arg3, ipc_data_t *data) |
437 | { |
437 | { |
438 | call_t call; |
438 | call_t call; |
439 | phone_t *phone; |
439 | phone_t *phone; |
440 | int res; |
440 | int res; |
441 | int rc; |
441 | int rc; |
442 | 442 | ||
443 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
443 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
444 | 444 | ||
445 | ipc_call_static_init(&call); |
445 | ipc_call_static_init(&call); |
446 | IPC_SET_METHOD(call.data, method); |
446 | IPC_SET_METHOD(call.data, method); |
447 | IPC_SET_ARG1(call.data, arg1); |
447 | IPC_SET_ARG1(call.data, arg1); |
448 | IPC_SET_ARG2(call.data, arg2); |
448 | IPC_SET_ARG2(call.data, arg2); |
449 | IPC_SET_ARG3(call.data, arg3); |
449 | IPC_SET_ARG3(call.data, arg3); |
450 | /* |
450 | /* |
451 | * To achieve deterministic behavior, zero out arguments that are beyond |
451 | * To achieve deterministic behavior, zero out arguments that are beyond |
452 | * the limits of the fast version. |
452 | * the limits of the fast version. |
453 | */ |
453 | */ |
454 | IPC_SET_ARG4(call.data, 0); |
454 | IPC_SET_ARG4(call.data, 0); |
455 | IPC_SET_ARG5(call.data, 0); |
455 | IPC_SET_ARG5(call.data, 0); |
456 | 456 | ||
457 | if (!(res = request_preprocess(&call, phone))) { |
457 | if (!(res = request_preprocess(&call, phone))) { |
458 | rc = ipc_call_sync(phone, &call); |
458 | rc = ipc_call_sync(phone, &call); |
459 | if (rc != EOK) |
459 | if (rc != EOK) |
460 | return rc; |
460 | return rc; |
461 | process_answer(&call); |
461 | process_answer(&call); |
462 | } else { |
462 | } else { |
463 | IPC_SET_RETVAL(call.data, res); |
463 | IPC_SET_RETVAL(call.data, res); |
464 | } |
464 | } |
465 | rc = STRUCT_TO_USPACE(&data->args, &call.data.args); |
465 | rc = STRUCT_TO_USPACE(&data->args, &call.data.args); |
466 | if (rc != 0) |
466 | if (rc != 0) |
467 | return rc; |
467 | return rc; |
468 | 468 | ||
469 | return 0; |
469 | return 0; |
470 | } |
470 | } |
471 | 471 | ||
472 | /** Make a synchronous IPC call allowing to transmit the entire payload. |
472 | /** Make a synchronous IPC call allowing to transmit the entire payload. |
473 | * |
473 | * |
474 | * @param phoneid Phone handle for the call. |
474 | * @param phoneid Phone handle for the call. |
475 | * @param question Userspace address of call data with the request. |
475 | * @param question Userspace address of call data with the request. |
476 | * @param reply Userspace address of call data where to store the |
476 | * @param reply Userspace address of call data where to store the |
477 | * answer. |
477 | * answer. |
478 | * |
478 | * |
479 | * @return Zero on success or an error code. |
479 | * @return Zero on success or an error code. |
480 | */ |
480 | */ |
481 | unative_t sys_ipc_call_sync_slow(unative_t phoneid, ipc_data_t *question, |
481 | unative_t sys_ipc_call_sync_slow(unative_t phoneid, ipc_data_t *question, |
482 | ipc_data_t *reply) |
482 | ipc_data_t *reply) |
483 | { |
483 | { |
484 | call_t call; |
484 | call_t call; |
485 | phone_t *phone; |
485 | phone_t *phone; |
486 | int res; |
486 | int res; |
487 | int rc; |
487 | int rc; |
488 | 488 | ||
489 | ipc_call_static_init(&call); |
489 | ipc_call_static_init(&call); |
490 | rc = copy_from_uspace(&call.data.args, &question->args, |
490 | rc = copy_from_uspace(&call.data.args, &question->args, |
491 | sizeof(call.data.args)); |
491 | sizeof(call.data.args)); |
492 | if (rc != 0) |
492 | if (rc != 0) |
493 | return (unative_t) rc; |
493 | return (unative_t) rc; |
494 | 494 | ||
495 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
495 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
496 | 496 | ||
497 | if (!(res = request_preprocess(&call, phone))) { |
497 | if (!(res = request_preprocess(&call, phone))) { |
498 | rc = ipc_call_sync(phone, &call); |
498 | rc = ipc_call_sync(phone, &call); |
499 | if (rc != EOK) |
499 | if (rc != EOK) |
500 | return rc; |
500 | return rc; |
501 | process_answer(&call); |
501 | process_answer(&call); |
502 | } else |
502 | } else |
503 | IPC_SET_RETVAL(call.data, res); |
503 | IPC_SET_RETVAL(call.data, res); |
504 | 504 | ||
505 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
505 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
506 | if (rc != 0) |
506 | if (rc != 0) |
507 | return rc; |
507 | return rc; |
508 | 508 | ||
509 | return 0; |
509 | return 0; |
510 | } |
510 | } |
511 | 511 | ||
512 | /** Check that the task did not exceed the allowed limit of asynchronous calls. |
512 | /** Check that the task did not exceed the allowed limit of asynchronous calls. |
513 | * |
513 | * |
514 | * @return Return 0 if limit not reached or -1 if limit exceeded. |
514 | * @return Return 0 if limit not reached or -1 if limit exceeded. |
515 | */ |
515 | */ |
516 | static int check_call_limit(void) |
516 | static int check_call_limit(void) |
517 | { |
517 | { |
518 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
518 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
519 | atomic_dec(&TASK->active_calls); |
519 | atomic_dec(&TASK->active_calls); |
520 | return -1; |
520 | return -1; |
521 | } |
521 | } |
522 | return 0; |
522 | return 0; |
523 | } |
523 | } |
524 | 524 | ||
525 | /** Make a fast asynchronous call over IPC. |
525 | /** Make a fast asynchronous call over IPC. |
526 | * |
526 | * |
527 | * This function can only handle four arguments of payload, but is faster than |
527 | * This function can only handle four arguments of payload, but is faster than |
528 | * the generic function sys_ipc_call_async_slow(). |
528 | * the generic function sys_ipc_call_async_slow(). |
529 | * |
529 | * |
530 | * @param phoneid Phone handle for the call. |
530 | * @param phoneid Phone handle for the call. |
531 | * @param method Method of the call. |
531 | * @param method Method of the call. |
532 | * @param arg1 Service-defined payload argument. |
532 | * @param arg1 Service-defined payload argument. |
533 | * @param arg2 Service-defined payload argument. |
533 | * @param arg2 Service-defined payload argument. |
534 | * @param arg3 Service-defined payload argument. |
534 | * @param arg3 Service-defined payload argument. |
535 | * @param arg4 Service-defined payload argument. |
535 | * @param arg4 Service-defined payload argument. |
536 | * |
536 | * |
537 | * @return Return call hash on success. |
537 | * @return Return call hash on success. |
538 | * Return IPC_CALLRET_FATAL in case of a fatal error and |
538 | * Return IPC_CALLRET_FATAL in case of a fatal error and |
539 | * IPC_CALLRET_TEMPORARY if there are too many pending |
539 | * IPC_CALLRET_TEMPORARY if there are too many pending |
540 | * asynchronous requests; answers should be handled first. |
540 | * asynchronous requests; answers should be handled first. |
541 | */ |
541 | */ |
542 | unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method, |
542 | unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method, |
543 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
543 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
544 | { |
544 | { |
545 | call_t *call; |
545 | call_t *call; |
546 | phone_t *phone; |
546 | phone_t *phone; |
547 | int res; |
547 | int res; |
548 | 548 | ||
549 | if (check_call_limit()) |
549 | if (check_call_limit()) |
550 | return IPC_CALLRET_TEMPORARY; |
550 | return IPC_CALLRET_TEMPORARY; |
551 | 551 | ||
552 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
552 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
553 | 553 | ||
554 | call = ipc_call_alloc(0); |
554 | call = ipc_call_alloc(0); |
555 | IPC_SET_METHOD(call->data, method); |
555 | IPC_SET_METHOD(call->data, method); |
556 | IPC_SET_ARG1(call->data, arg1); |
556 | IPC_SET_ARG1(call->data, arg1); |
557 | IPC_SET_ARG2(call->data, arg2); |
557 | IPC_SET_ARG2(call->data, arg2); |
558 | IPC_SET_ARG3(call->data, arg3); |
558 | IPC_SET_ARG3(call->data, arg3); |
559 | IPC_SET_ARG4(call->data, arg4); |
559 | IPC_SET_ARG4(call->data, arg4); |
560 | /* |
560 | /* |
561 | * To achieve deterministic behavior, zero out arguments that are beyond |
561 | * To achieve deterministic behavior, zero out arguments that are beyond |
562 | * the limits of the fast version. |
562 | * the limits of the fast version. |
563 | */ |
563 | */ |
564 | IPC_SET_ARG5(call->data, 0); |
564 | IPC_SET_ARG5(call->data, 0); |
565 | 565 | ||
566 | if (!(res = request_preprocess(call, phone))) |
566 | if (!(res = request_preprocess(call, phone))) |
567 | ipc_call(phone, call); |
567 | ipc_call(phone, call); |
568 | else |
568 | else |
569 | ipc_backsend_err(phone, call, res); |
569 | ipc_backsend_err(phone, call, res); |
570 | 570 | ||
571 | return (unative_t) call; |
571 | return (unative_t) call; |
572 | } |
572 | } |
573 | 573 | ||
574 | /** Make an asynchronous IPC call allowing to transmit the entire payload. |
574 | /** Make an asynchronous IPC call allowing to transmit the entire payload. |
575 | * |
575 | * |
576 | * @param phoneid Phone handle for the call. |
576 | * @param phoneid Phone handle for the call. |
577 | * @param data Userspace address of call data with the request. |
577 | * @param data Userspace address of call data with the request. |
578 | * |
578 | * |
579 | * @return See sys_ipc_call_async_fast(). |
579 | * @return See sys_ipc_call_async_fast(). |
580 | */ |
580 | */ |
581 | unative_t sys_ipc_call_async_slow(unative_t phoneid, ipc_data_t *data) |
581 | unative_t sys_ipc_call_async_slow(unative_t phoneid, ipc_data_t *data) |
582 | { |
582 | { |
583 | call_t *call; |
583 | call_t *call; |
584 | phone_t *phone; |
584 | phone_t *phone; |
585 | int res; |
585 | int res; |
586 | int rc; |
586 | int rc; |
587 | 587 | ||
588 | if (check_call_limit()) |
588 | if (check_call_limit()) |
589 | return IPC_CALLRET_TEMPORARY; |
589 | return IPC_CALLRET_TEMPORARY; |
590 | 590 | ||
591 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
591 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
592 | 592 | ||
593 | call = ipc_call_alloc(0); |
593 | call = ipc_call_alloc(0); |
594 | rc = copy_from_uspace(&call->data.args, &data->args, |
594 | rc = copy_from_uspace(&call->data.args, &data->args, |
595 | sizeof(call->data.args)); |
595 | sizeof(call->data.args)); |
596 | if (rc != 0) { |
596 | if (rc != 0) { |
597 | ipc_call_free(call); |
597 | ipc_call_free(call); |
598 | return (unative_t) rc; |
598 | return (unative_t) rc; |
599 | } |
599 | } |
600 | if (!(res = request_preprocess(call, phone))) |
600 | if (!(res = request_preprocess(call, phone))) |
601 | ipc_call(phone, call); |
601 | ipc_call(phone, call); |
602 | else |
602 | else |
603 | ipc_backsend_err(phone, call, res); |
603 | ipc_backsend_err(phone, call, res); |
604 | 604 | ||
605 | return (unative_t) call; |
605 | return (unative_t) call; |
606 | } |
606 | } |
607 | 607 | ||
608 | /** Forward a received call to another destination. |
608 | /** Forward a received call to another destination. |
609 | * |
609 | * |
610 | * @param callid Hash of the call to forward. |
610 | * @param callid Hash of the call to forward. |
611 | * @param phoneid Phone handle to use for forwarding. |
611 | * @param phoneid Phone handle to use for forwarding. |
612 | * @param method New method to use for the forwarded call. |
612 | * @param method New method to use for the forwarded call. |
613 | * @param arg1 New value of the first argument for the forwarded call. |
613 | * @param arg1 New value of the first argument for the forwarded call. |
614 | * @param arg2 New value of the second argument for the forwarded call. |
614 | * @param arg2 New value of the second argument for the forwarded call. |
615 | * @param mode Flags that specify mode of the forward operation. |
615 | * @param mode Flags that specify mode of the forward operation. |
616 | * |
616 | * |
617 | * @return Return 0 on succes, otherwise return an error code. |
617 | * @return Return 0 on succes, otherwise return an error code. |
618 | * |
618 | * |
619 | * In case the original method is a system method, ARG1, ARG2 and ARG3 are |
619 | * In case the original method is a system method, ARG1, ARG2 and ARG3 are |
620 | * overwritten in the forwarded message with the new method and the new arg1 and |
620 | * overwritten in the forwarded message with the new method and the new arg1 and |
621 | * arg2, respectively. Otherwise the METHOD, ARG1 and ARG2 are rewritten with |
621 | * arg2, respectively. Otherwise the METHOD, ARG1 and ARG2 are rewritten with |
622 | * the new method, arg1 and arg2, respectively. Also note there is a set of |
622 | * the new method, arg1 and arg2, respectively. Also note there is a set of |
623 | * immutable methods, for which the new method and argument is not set and |
623 | * immutable methods, for which the new method and argument is not set and |
624 | * these values are ignored. |
624 | * these values are ignored. |
625 | * |
625 | * |
626 | * Warning: When implementing support for changing additional payload |
626 | * Warning: When implementing support for changing additional payload |
627 | * arguments, make sure that ARG5 is not rewritten for certain |
627 | * arguments, make sure that ARG5 is not rewritten for certain |
628 | * system IPC |
628 | * system IPC |
629 | */ |
629 | */ |
630 | unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid, |
630 | unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid, |
631 | unative_t method, unative_t arg1, unative_t arg2, int mode) |
631 | unative_t method, unative_t arg1, unative_t arg2, int mode) |
632 | { |
632 | { |
633 | call_t *call; |
633 | call_t *call; |
634 | phone_t *phone; |
634 | phone_t *phone; |
635 | 635 | ||
636 | call = get_call(callid); |
636 | call = get_call(callid); |
637 | if (!call) |
637 | if (!call) |
638 | return ENOENT; |
638 | return ENOENT; |
639 | 639 | ||
640 | call->flags |= IPC_CALL_FORWARDED; |
640 | call->flags |= IPC_CALL_FORWARDED; |
641 | 641 | ||
642 | GET_CHECK_PHONE(phone, phoneid, { |
642 | GET_CHECK_PHONE(phone, phoneid, { |
643 | IPC_SET_RETVAL(call->data, EFORWARD); |
643 | IPC_SET_RETVAL(call->data, EFORWARD); |
644 | ipc_answer(&TASK->answerbox, call); |
644 | ipc_answer(&TASK->answerbox, call); |
645 | return ENOENT; |
645 | return ENOENT; |
646 | }); |
646 | }); |
647 | 647 | ||
648 | if (!method_is_forwardable(IPC_GET_METHOD(call->data))) { |
648 | if (!method_is_forwardable(IPC_GET_METHOD(call->data))) { |
649 | IPC_SET_RETVAL(call->data, EFORWARD); |
649 | IPC_SET_RETVAL(call->data, EFORWARD); |
650 | ipc_answer(&TASK->answerbox, call); |
650 | ipc_answer(&TASK->answerbox, call); |
651 | return EPERM; |
651 | return EPERM; |
652 | } |
652 | } |
653 | 653 | ||
654 | /* |
654 | /* |
655 | * Userspace is not allowed to change method of system methods on |
655 | * Userspace is not allowed to change method of system methods on |
656 | * forward, allow changing ARG1, ARG2 and ARG3 by means of method, |
656 | * forward, allow changing ARG1, ARG2 and ARG3 by means of method, |
657 | * arg1 and arg2. |
657 | * arg1 and arg2. |
658 | * If the method is immutable, don't change anything. |
658 | * If the method is immutable, don't change anything. |
659 | */ |
659 | */ |
660 | if (!method_is_immutable(IPC_GET_METHOD(call->data))) { |
660 | if (!method_is_immutable(IPC_GET_METHOD(call->data))) { |
661 | if (method_is_system(IPC_GET_METHOD(call->data))) { |
661 | if (method_is_system(IPC_GET_METHOD(call->data))) { |
662 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
662 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
663 | phone_dealloc(IPC_GET_ARG5(call->data)); |
663 | phone_dealloc(IPC_GET_ARG5(call->data)); |
664 | 664 | ||
665 | IPC_SET_ARG1(call->data, method); |
665 | IPC_SET_ARG1(call->data, method); |
666 | IPC_SET_ARG2(call->data, arg1); |
666 | IPC_SET_ARG2(call->data, arg1); |
667 | IPC_SET_ARG3(call->data, arg2); |
667 | IPC_SET_ARG3(call->data, arg2); |
668 | } else { |
668 | } else { |
669 | IPC_SET_METHOD(call->data, method); |
669 | IPC_SET_METHOD(call->data, method); |
670 | IPC_SET_ARG1(call->data, arg1); |
670 | IPC_SET_ARG1(call->data, arg1); |
671 | IPC_SET_ARG2(call->data, arg2); |
671 | IPC_SET_ARG2(call->data, arg2); |
672 | } |
672 | } |
673 | } |
673 | } |
674 | 674 | ||
675 | return ipc_forward(call, phone, &TASK->answerbox, mode); |
675 | return ipc_forward(call, phone, &TASK->answerbox, mode); |
676 | } |
676 | } |
677 | 677 | ||
678 | /** Answer an IPC call - fast version. |
678 | /** Answer an IPC call - fast version. |
679 | * |
679 | * |
680 | * This function can handle only two return arguments of payload, but is faster |
680 | * This function can handle only two return arguments of payload, but is faster |
681 | * than the generic sys_ipc_answer(). |
681 | * than the generic sys_ipc_answer(). |
682 | * |
682 | * |
683 | * @param callid Hash of the call to be answered. |
683 | * @param callid Hash of the call to be answered. |
684 | * @param retval Return value of the answer. |
684 | * @param retval Return value of the answer. |
685 | * @param arg1 Service-defined return value. |
685 | * @param arg1 Service-defined return value. |
686 | * @param arg2 Service-defined return value. |
686 | * @param arg2 Service-defined return value. |
687 | * @param arg3 Service-defined return value. |
687 | * @param arg3 Service-defined return value. |
688 | * @param arg4 Service-defined return value. |
688 | * @param arg4 Service-defined return value. |
689 | * |
689 | * |
690 | * @return Return 0 on success, otherwise return an error code. |
690 | * @return Return 0 on success, otherwise return an error code. |
691 | */ |
691 | */ |
692 | unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, |
692 | unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, |
693 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
693 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
694 | { |
694 | { |
695 | call_t *call; |
695 | call_t *call; |
696 | ipc_data_t saved_data; |
696 | ipc_data_t saved_data; |
697 | int saveddata = 0; |
697 | int saveddata = 0; |
698 | int rc; |
698 | int rc; |
699 | 699 | ||
700 | /* Do not answer notification callids */ |
700 | /* Do not answer notification callids */ |
701 | if (callid & IPC_CALLID_NOTIFICATION) |
701 | if (callid & IPC_CALLID_NOTIFICATION) |
702 | return 0; |
702 | return 0; |
703 | 703 | ||
704 | call = get_call(callid); |
704 | call = get_call(callid); |
705 | if (!call) |
705 | if (!call) |
706 | return ENOENT; |
706 | return ENOENT; |
707 | 707 | ||
708 | if (answer_need_old(call)) { |
708 | if (answer_need_old(call)) { |
709 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
709 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
710 | saveddata = 1; |
710 | saveddata = 1; |
711 | } |
711 | } |
712 | 712 | ||
713 | IPC_SET_RETVAL(call->data, retval); |
713 | IPC_SET_RETVAL(call->data, retval); |
714 | IPC_SET_ARG1(call->data, arg1); |
714 | IPC_SET_ARG1(call->data, arg1); |
715 | IPC_SET_ARG2(call->data, arg2); |
715 | IPC_SET_ARG2(call->data, arg2); |
716 | IPC_SET_ARG3(call->data, arg3); |
716 | IPC_SET_ARG3(call->data, arg3); |
717 | IPC_SET_ARG4(call->data, arg4); |
717 | IPC_SET_ARG4(call->data, arg4); |
718 | /* |
718 | /* |
719 | * To achieve deterministic behavior, zero out arguments that are beyond |
719 | * To achieve deterministic behavior, zero out arguments that are beyond |
720 | * the limits of the fast version. |
720 | * the limits of the fast version. |
721 | */ |
721 | */ |
722 | IPC_SET_ARG5(call->data, 0); |
722 | IPC_SET_ARG5(call->data, 0); |
723 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
723 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
724 | 724 | ||
725 | ipc_answer(&TASK->answerbox, call); |
725 | ipc_answer(&TASK->answerbox, call); |
726 | return rc; |
726 | return rc; |
727 | } |
727 | } |
728 | 728 | ||
729 | /** Answer an IPC call. |
729 | /** Answer an IPC call. |
730 | * |
730 | * |
731 | * @param callid Hash of the call to be answered. |
731 | * @param callid Hash of the call to be answered. |
732 | * @param data Userspace address of call data with the answer. |
732 | * @param data Userspace address of call data with the answer. |
733 | * |
733 | * |
734 | * @return Return 0 on success, otherwise return an error code. |
734 | * @return Return 0 on success, otherwise return an error code. |
735 | */ |
735 | */ |
736 | unative_t sys_ipc_answer_slow(unative_t callid, ipc_data_t *data) |
736 | unative_t sys_ipc_answer_slow(unative_t callid, ipc_data_t *data) |
737 | { |
737 | { |
738 | call_t *call; |
738 | call_t *call; |
739 | ipc_data_t saved_data; |
739 | ipc_data_t saved_data; |
740 | int saveddata = 0; |
740 | int saveddata = 0; |
741 | int rc; |
741 | int rc; |
742 | 742 | ||
743 | /* Do not answer notification callids */ |
743 | /* Do not answer notification callids */ |
744 | if (callid & IPC_CALLID_NOTIFICATION) |
744 | if (callid & IPC_CALLID_NOTIFICATION) |
745 | return 0; |
745 | return 0; |
746 | 746 | ||
747 | call = get_call(callid); |
747 | call = get_call(callid); |
748 | if (!call) |
748 | if (!call) |
749 | return ENOENT; |
749 | return ENOENT; |
750 | 750 | ||
751 | if (answer_need_old(call)) { |
751 | if (answer_need_old(call)) { |
752 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
752 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
753 | saveddata = 1; |
753 | saveddata = 1; |
754 | } |
754 | } |
755 | rc = copy_from_uspace(&call->data.args, &data->args, |
755 | rc = copy_from_uspace(&call->data.args, &data->args, |
756 | sizeof(call->data.args)); |
756 | sizeof(call->data.args)); |
757 | if (rc != 0) |
757 | if (rc != 0) |
758 | return rc; |
758 | return rc; |
759 | 759 | ||
760 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
760 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
761 | 761 | ||
762 | ipc_answer(&TASK->answerbox, call); |
762 | ipc_answer(&TASK->answerbox, call); |
763 | 763 | ||
764 | return rc; |
764 | return rc; |
765 | } |
765 | } |
766 | 766 | ||
767 | /** Hang up a phone. |
767 | /** Hang up a phone. |
768 | * |
768 | * |
769 | * @param Phone handle of the phone to be hung up. |
769 | * @param Phone handle of the phone to be hung up. |
770 | * |
770 | * |
771 | * @return Return 0 on success or an error code. |
771 | * @return Return 0 on success or an error code. |
772 | */ |
772 | */ |
773 | unative_t sys_ipc_hangup(int phoneid) |
773 | unative_t sys_ipc_hangup(int phoneid) |
774 | { |
774 | { |
775 | phone_t *phone; |
775 | phone_t *phone; |
776 | 776 | ||
777 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
777 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
778 | 778 | ||
779 | if (ipc_phone_hangup(phone)) |
779 | if (ipc_phone_hangup(phone)) |
780 | return -1; |
780 | return -1; |
781 | 781 | ||
782 | return 0; |
782 | return 0; |
783 | } |
783 | } |
784 | 784 | ||
785 | /** Wait for an incoming IPC call or an answer. |
785 | /** Wait for an incoming IPC call or an answer. |
786 | * |
786 | * |
787 | * @param calldata Pointer to buffer where the call/answer data is stored. |
787 | * @param calldata Pointer to buffer where the call/answer data is stored. |
788 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
788 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
789 | * @param flags Select mode of sleep operation. See waitq_sleep_timeout() |
789 | * @param flags Select mode of sleep operation. See waitq_sleep_timeout() |
790 | * for explanation. |
790 | * for explanation. |
791 | * |
791 | * |
792 | * @return Hash of the call. |
792 | * @return Hash of the call. |
793 | * If IPC_CALLID_NOTIFICATION bit is set in the hash, the |
793 | * If IPC_CALLID_NOTIFICATION bit is set in the hash, the |
794 | * call is a notification. IPC_CALLID_ANSWERED denotes an |
794 | * call is a notification. IPC_CALLID_ANSWERED denotes an |
795 | * answer. |
795 | * answer. |
796 | */ |
796 | */ |
797 | unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags) |
797 | unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags) |
798 | { |
798 | { |
799 | call_t *call; |
799 | call_t *call; |
800 | 800 | ||
801 | restart: |
801 | restart: |
802 | call = ipc_wait_for_call(&TASK->answerbox, usec, |
802 | call = ipc_wait_for_call(&TASK->answerbox, usec, |
803 | flags | SYNCH_FLAGS_INTERRUPTIBLE); |
803 | flags | SYNCH_FLAGS_INTERRUPTIBLE); |
804 | if (!call) |
804 | if (!call) |
805 | return 0; |
805 | return 0; |
806 | 806 | ||
807 | if (call->flags & IPC_CALL_NOTIF) { |
807 | if (call->flags & IPC_CALL_NOTIF) { |
808 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
808 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
809 | 809 | ||
810 | /* Set in_phone_hash to the interrupt counter */ |
810 | /* Set in_phone_hash to the interrupt counter */ |
811 | call->data.phone = (void *) call->priv; |
811 | call->data.phone = (void *) call->priv; |
812 | 812 | ||
813 | STRUCT_TO_USPACE(calldata, &call->data); |
813 | STRUCT_TO_USPACE(calldata, &call->data); |
814 | 814 | ||
815 | ipc_call_free(call); |
815 | ipc_call_free(call); |
816 | 816 | ||
817 | return ((unative_t) call) | IPC_CALLID_NOTIFICATION; |
817 | return ((unative_t) call) | IPC_CALLID_NOTIFICATION; |
818 | } |
818 | } |
819 | 819 | ||
820 | if (call->flags & IPC_CALL_ANSWERED) { |
820 | if (call->flags & IPC_CALL_ANSWERED) { |
821 | process_answer(call); |
821 | process_answer(call); |
822 | 822 | ||
823 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
823 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
824 | 824 | ||
- | 825 | if (!(call->flags & IPC_CALL_DISCARD_ANSWER)) |
|
825 | atomic_dec(&TASK->active_calls); |
826 | atomic_dec(&TASK->active_calls); |
826 | 827 | ||
827 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
828 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
828 | ipc_call_free(call); |
829 | ipc_call_free(call); |
829 | goto restart; |
830 | goto restart; |
830 | } |
831 | } |
831 | 832 | ||
832 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
833 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
833 | ipc_call_free(call); |
834 | ipc_call_free(call); |
834 | 835 | ||
835 | return ((unative_t) call) | IPC_CALLID_ANSWERED; |
836 | return ((unative_t) call) | IPC_CALLID_ANSWERED; |
836 | } |
837 | } |
837 | 838 | ||
838 | if (process_request(&TASK->answerbox, call)) |
839 | if (process_request(&TASK->answerbox, call)) |
839 | goto restart; |
840 | goto restart; |
840 | 841 | ||
841 | /* Include phone address('id') of the caller in the request, |
842 | /* Include phone address('id') of the caller in the request, |
842 | * copy whole call->data, not only call->data.args */ |
843 | * copy whole call->data, not only call->data.args */ |
843 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
844 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
844 | return 0; |
845 | return 0; |
845 | } |
846 | } |
846 | return (unative_t)call; |
847 | return (unative_t)call; |
847 | } |
848 | } |
848 | 849 | ||
849 | /** Connect an IRQ handler to a task. |
850 | /** Connect an IRQ handler to a task. |
850 | * |
851 | * |
851 | * @param inr IRQ number. |
852 | * @param inr IRQ number. |
852 | * @param devno Device number. |
853 | * @param devno Device number. |
853 | * @param method Method to be associated with the notification. |
854 | * @param method Method to be associated with the notification. |
854 | * @param ucode Uspace pointer to the top-half pseudocode. |
855 | * @param ucode Uspace pointer to the top-half pseudocode. |
855 | * |
856 | * |
856 | * @return EPERM or a return code returned by ipc_irq_register(). |
857 | * @return EPERM or a return code returned by ipc_irq_register(). |
857 | */ |
858 | */ |
858 | unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method, |
859 | unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method, |
859 | irq_code_t *ucode) |
860 | irq_code_t *ucode) |
860 | { |
861 | { |
861 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
862 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
862 | return EPERM; |
863 | return EPERM; |
863 | 864 | ||
864 | return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode); |
865 | return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode); |
865 | } |
866 | } |
866 | 867 | ||
867 | /** Disconnect an IRQ handler from a task. |
868 | /** Disconnect an IRQ handler from a task. |
868 | * |
869 | * |
869 | * @param inr IRQ number. |
870 | * @param inr IRQ number. |
870 | * @param devno Device number. |
871 | * @param devno Device number. |
871 | * |
872 | * |
872 | * @return Zero on success or EPERM on error.. |
873 | * @return Zero on success or EPERM on error.. |
873 | */ |
874 | */ |
874 | unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno) |
875 | unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno) |
875 | { |
876 | { |
876 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
877 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
877 | return EPERM; |
878 | return EPERM; |
878 | 879 | ||
879 | ipc_irq_unregister(&TASK->answerbox, inr, devno); |
880 | ipc_irq_unregister(&TASK->answerbox, inr, devno); |
880 | 881 | ||
881 | return 0; |
882 | return 0; |
882 | } |
883 | } |
883 | 884 | ||
884 | #include <console/console.h> |
885 | #include <console/console.h> |
885 | 886 | ||
886 | /** |
887 | /** |
887 | * Syscall connect to a task by id. |
888 | * Syscall connect to a task by id. |
888 | * |
889 | * |
889 | * @return Phone id on success, or negative error code. |
890 | * @return Phone id on success, or negative error code. |
890 | */ |
891 | */ |
891 | unative_t sys_ipc_connect_kbox(sysarg64_t *uspace_taskid_arg) |
892 | unative_t sys_ipc_connect_kbox(sysarg64_t *uspace_taskid_arg) |
892 | { |
893 | { |
893 | #ifdef CONFIG_UDEBUG |
894 | #ifdef CONFIG_UDEBUG |
894 | sysarg64_t taskid_arg; |
895 | sysarg64_t taskid_arg; |
895 | int rc; |
896 | int rc; |
896 | 897 | ||
897 | rc = copy_from_uspace(&taskid_arg, uspace_taskid_arg, sizeof(sysarg64_t)); |
898 | rc = copy_from_uspace(&taskid_arg, uspace_taskid_arg, sizeof(sysarg64_t)); |
898 | if (rc != 0) |
899 | if (rc != 0) |
899 | return (unative_t) rc; |
900 | return (unative_t) rc; |
900 | 901 | ||
901 | LOG("sys_ipc_connect_kbox(%" PRIu64 ")\n", taskid_arg.value); |
902 | LOG("sys_ipc_connect_kbox(%" PRIu64 ")\n", taskid_arg.value); |
902 | 903 | ||
903 | return ipc_connect_kbox(taskid_arg.value); |
904 | return ipc_connect_kbox(taskid_arg.value); |
904 | #else |
905 | #else |
905 | return (unative_t) ENOTSUP; |
906 | return (unative_t) ENOTSUP; |
906 | #endif |
907 | #endif |
907 | } |
908 | } |
908 | 909 | ||
909 | /** @} |
910 | /** @} |
910 | */ |
911 | */ |
911 | 912 |