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