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