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1027 | palkovsky | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2006 Ondrej Palkovsky |
1027 | palkovsky | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
1757 | jermar | 29 | /** @addtogroup genericipc |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
1027 | palkovsky | 35 | #include <arch.h> |
36 | #include <proc/task.h> |
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1288 | jermar | 37 | #include <proc/thread.h> |
1027 | palkovsky | 38 | #include <errno.h> |
39 | #include <memstr.h> |
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40 | #include <debug.h> |
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41 | #include <ipc/ipc.h> |
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42 | #include <ipc/sysipc.h> |
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1281 | palkovsky | 43 | #include <ipc/irq.h> |
1072 | palkovsky | 44 | #include <ipc/ipcrsc.h> |
2813 | svoboda | 45 | #include <udebug/udebug_ipc.h> |
1258 | palkovsky | 46 | #include <arch/interrupt.h> |
1027 | palkovsky | 47 | #include <print.h> |
1288 | jermar | 48 | #include <syscall/copy.h> |
1297 | jermar | 49 | #include <security/cap.h> |
1329 | palkovsky | 50 | #include <mm/as.h> |
1875 | jermar | 51 | #include <print.h> |
1027 | palkovsky | 52 | |
2660 | jermar | 53 | /** |
54 | * Maximum buffer size allowed for IPC_M_DATA_WRITE and IPC_M_DATA_READ |
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55 | * requests. |
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56 | */ |
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57 | #define DATA_XFER_LIMIT (64 * 1024) |
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2494 | jermar | 58 | |
2471 | jermar | 59 | #define GET_CHECK_PHONE(phone, phoneid, err) \ |
60 | { \ |
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61 | if (phoneid > IPC_MAX_PHONES) { \ |
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62 | err; \ |
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63 | } \ |
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64 | phone = &TASK->phones[phoneid]; \ |
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1084 | palkovsky | 65 | } |
66 | |||
2471 | jermar | 67 | #define STRUCT_TO_USPACE(dst, src) copy_to_uspace(dst, src, sizeof(*(src))) |
1084 | palkovsky | 68 | |
2471 | jermar | 69 | /** Decide if the method is a system method. |
70 | * |
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71 | * @param method Method to be decided. |
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72 | * |
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73 | * @return Return 1 if the method is a system method. |
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74 | * Otherwise return 0. |
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75 | */ |
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2557 | jermar | 76 | static inline int method_is_system(unative_t method) |
1040 | palkovsky | 77 | { |
78 | if (method <= IPC_M_LAST_SYSTEM) |
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79 | return 1; |
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80 | return 0; |
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81 | } |
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82 | |||
2471 | jermar | 83 | /** Decide if the message with this method is forwardable. |
1040 | palkovsky | 84 | * |
85 | * - some system messages may be forwarded, for some of them |
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86 | * it is useless |
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2471 | jermar | 87 | * |
88 | * @param method Method to be decided. |
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89 | * |
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90 | * @return Return 1 if the method is forwardable. |
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91 | * Otherwise return 0. |
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1040 | palkovsky | 92 | */ |
2557 | jermar | 93 | static inline int method_is_forwardable(unative_t method) |
1040 | palkovsky | 94 | { |
2494 | jermar | 95 | switch (method) { |
96 | case IPC_M_PHONE_HUNGUP: |
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97 | /* This message is meant only for the original recipient. */ |
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98 | return 0; |
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99 | default: |
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100 | return 1; |
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101 | } |
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1040 | palkovsky | 102 | } |
103 | |||
2557 | jermar | 104 | /** Decide if the message with this method is immutable on forward. |
105 | * |
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2601 | jermar | 106 | * - some system messages may be forwarded but their content cannot be altered |
2557 | jermar | 107 | * |
108 | * @param method Method to be decided. |
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109 | * |
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110 | * @return Return 1 if the method is immutable on forward. |
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111 | * Otherwise return 0. |
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112 | */ |
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113 | static inline int method_is_immutable(unative_t method) |
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114 | { |
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115 | switch (method) { |
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2677 | jermar | 116 | case IPC_M_SHARE_OUT: |
117 | case IPC_M_SHARE_IN: |
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2660 | jermar | 118 | case IPC_M_DATA_WRITE: |
119 | case IPC_M_DATA_READ: |
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2557 | jermar | 120 | return 1; |
121 | break; |
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122 | default: |
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123 | return 0; |
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124 | } |
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125 | } |
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1027 | palkovsky | 126 | |
2557 | jermar | 127 | |
2471 | jermar | 128 | /*********************************************************************** |
129 | * Functions that preprocess answer before sending it to the recepient. |
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130 | ***********************************************************************/ |
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131 | |||
132 | /** Decide if the caller (e.g. ipc_answer()) should save the old call contents |
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133 | * for answer_preprocess(). |
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134 | * |
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135 | * @param call Call structure to be decided. |
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136 | * |
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137 | * @return Return 1 if the old call contents should be saved. |
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138 | * Return 0 otherwise. |
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1027 | palkovsky | 139 | */ |
1088 | palkovsky | 140 | static inline int answer_need_old(call_t *call) |
1027 | palkovsky | 141 | { |
2494 | jermar | 142 | switch (IPC_GET_METHOD(call->data)) { |
143 | case IPC_M_CONNECT_TO_ME: |
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144 | case IPC_M_CONNECT_ME_TO: |
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2677 | jermar | 145 | case IPC_M_SHARE_OUT: |
146 | case IPC_M_SHARE_IN: |
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2660 | jermar | 147 | case IPC_M_DATA_WRITE: |
148 | case IPC_M_DATA_READ: |
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1027 | palkovsky | 149 | return 1; |
2494 | jermar | 150 | default: |
151 | return 0; |
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152 | } |
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1027 | palkovsky | 153 | } |
154 | |||
2471 | jermar | 155 | /** Interpret process answer as control information. |
1428 | palkovsky | 156 | * |
2471 | jermar | 157 | * This function is called directly after sys_ipc_answer(). |
158 | * |
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159 | * @param answer Call structure with the answer. |
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160 | * @param olddata Saved data of the request. |
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161 | * |
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162 | * @return Return 0 on success or an error code. |
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1428 | palkovsky | 163 | */ |
1329 | palkovsky | 164 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
1027 | palkovsky | 165 | { |
166 | int phoneid; |
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167 | |||
2745 | decky | 168 | if ((native_t) IPC_GET_RETVAL(answer->data) == EHANGUP) { |
1141 | palkovsky | 169 | /* In case of forward, hangup the forwared phone, |
170 | * not the originator |
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171 | */ |
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3042 | svoboda | 172 | mutex_lock(&answer->data.phone->lock); |
1141 | palkovsky | 173 | spinlock_lock(&TASK->answerbox.lock); |
1568 | palkovsky | 174 | if (answer->data.phone->state == IPC_PHONE_CONNECTED) { |
1573 | palkovsky | 175 | list_remove(&answer->data.phone->link); |
1568 | palkovsky | 176 | answer->data.phone->state = IPC_PHONE_SLAMMED; |
1141 | palkovsky | 177 | } |
178 | spinlock_unlock(&TASK->answerbox.lock); |
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3042 | svoboda | 179 | mutex_unlock(&answer->data.phone->lock); |
1088 | palkovsky | 180 | } |
181 | |||
182 | if (!olddata) |
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1329 | palkovsky | 183 | return 0; |
1088 | palkovsky | 184 | |
1086 | palkovsky | 185 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
2637 | cejka | 186 | phoneid = IPC_GET_ARG5(*olddata); |
1027 | palkovsky | 187 | if (IPC_GET_RETVAL(answer->data)) { |
188 | /* The connection was not accepted */ |
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189 | phone_dealloc(phoneid); |
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1040 | palkovsky | 190 | } else { |
1090 | palkovsky | 191 | /* The connection was accepted */ |
2359 | jermar | 192 | phone_connect(phoneid, &answer->sender->answerbox); |
2638 | jermar | 193 | /* Set 'phone hash' as arg5 of response */ |
2637 | cejka | 194 | IPC_SET_ARG5(answer->data, |
2359 | jermar | 195 | (unative_t) &TASK->phones[phoneid]); |
1027 | palkovsky | 196 | } |
1086 | palkovsky | 197 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
1060 | palkovsky | 198 | /* If the users accepted call, connect */ |
199 | if (!IPC_GET_RETVAL(answer->data)) { |
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2635 | cejka | 200 | ipc_phone_connect((phone_t *) IPC_GET_ARG5(*olddata), |
2359 | jermar | 201 | &TASK->answerbox); |
1060 | palkovsky | 202 | } |
2677 | jermar | 203 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_OUT) { |
2359 | jermar | 204 | if (!IPC_GET_RETVAL(answer->data)) { |
205 | /* Accepted, handle as_area receipt */ |
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1413 | jermar | 206 | ipl_t ipl; |
1461 | palkovsky | 207 | int rc; |
1413 | jermar | 208 | as_t *as; |
209 | |||
210 | ipl = interrupts_disable(); |
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211 | spinlock_lock(&answer->sender->lock); |
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212 | as = answer->sender->as; |
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213 | spinlock_unlock(&answer->sender->lock); |
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214 | interrupts_restore(ipl); |
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215 | |||
2359 | jermar | 216 | rc = as_area_share(as, IPC_GET_ARG1(*olddata), |
217 | IPC_GET_ARG2(*olddata), AS, |
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218 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
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1461 | palkovsky | 219 | IPC_SET_RETVAL(answer->data, rc); |
220 | return rc; |
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1329 | palkovsky | 221 | } |
2677 | jermar | 222 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_IN) { |
1428 | palkovsky | 223 | if (!IPC_GET_RETVAL(answer->data)) { |
224 | ipl_t ipl; |
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225 | as_t *as; |
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1434 | palkovsky | 226 | int rc; |
1428 | palkovsky | 227 | |
228 | ipl = interrupts_disable(); |
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229 | spinlock_lock(&answer->sender->lock); |
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230 | as = answer->sender->as; |
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231 | spinlock_unlock(&answer->sender->lock); |
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232 | interrupts_restore(ipl); |
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233 | |||
2359 | jermar | 234 | rc = as_area_share(AS, IPC_GET_ARG1(answer->data), |
235 | IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata), |
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236 | IPC_GET_ARG2(answer->data)); |
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1434 | palkovsky | 237 | IPC_SET_RETVAL(answer->data, rc); |
1428 | palkovsky | 238 | } |
2662 | jermar | 239 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_READ) { |
240 | ASSERT(!answer->buffer); |
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241 | if (!IPC_GET_RETVAL(answer->data)) { |
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242 | /* The recipient agreed to send data. */ |
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243 | uintptr_t src = IPC_GET_ARG1(answer->data); |
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244 | uintptr_t dst = IPC_GET_ARG1(*olddata); |
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245 | size_t max_size = IPC_GET_ARG2(*olddata); |
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246 | size_t size = IPC_GET_ARG2(answer->data); |
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3011 | svoboda | 247 | if (size && size <= max_size) { |
2662 | jermar | 248 | /* |
249 | * Copy the destination VA so that this piece of |
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250 | * information is not lost. |
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251 | */ |
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252 | IPC_SET_ARG1(answer->data, dst); |
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253 | |||
254 | answer->buffer = malloc(size, 0); |
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255 | int rc = copy_from_uspace(answer->buffer, |
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256 | (void *) src, size); |
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257 | if (rc) { |
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258 | IPC_SET_RETVAL(answer->data, rc); |
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259 | free(answer->buffer); |
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260 | answer->buffer = NULL; |
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261 | } |
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3011 | svoboda | 262 | } else if (!size) { |
263 | IPC_SET_RETVAL(answer->data, EOK); |
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2662 | jermar | 264 | } else { |
265 | IPC_SET_RETVAL(answer->data, ELIMIT); |
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266 | } |
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267 | } |
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2660 | jermar | 268 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_WRITE) { |
2661 | jermar | 269 | ASSERT(answer->buffer); |
2494 | jermar | 270 | if (!IPC_GET_RETVAL(answer->data)) { |
2662 | jermar | 271 | /* The recipient agreed to receive data. */ |
2494 | jermar | 272 | int rc; |
273 | uintptr_t dst; |
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3425 | svoboda | 274 | size_t size; |
275 | size_t max_size; |
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2494 | jermar | 276 | |
3425 | svoboda | 277 | dst = (uintptr_t)IPC_GET_ARG1(answer->data); |
278 | size = (size_t)IPC_GET_ARG2(answer->data); |
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279 | max_size = (size_t)IPC_GET_ARG2(*olddata); |
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2494 | jermar | 280 | |
2662 | jermar | 281 | if (size <= max_size) { |
282 | rc = copy_to_uspace((void *) dst, |
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283 | answer->buffer, size); |
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284 | if (rc) |
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285 | IPC_SET_RETVAL(answer->data, rc); |
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286 | } else { |
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287 | IPC_SET_RETVAL(answer->data, ELIMIT); |
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288 | } |
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2494 | jermar | 289 | } |
2661 | jermar | 290 | free(answer->buffer); |
291 | answer->buffer = NULL; |
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1027 | palkovsky | 292 | } |
1329 | palkovsky | 293 | return 0; |
1027 | palkovsky | 294 | } |
295 | |||
2471 | jermar | 296 | /** Called before the request is sent. |
1090 | palkovsky | 297 | * |
2471 | jermar | 298 | * @param call Call structure with the request. |
2801 | svoboda | 299 | * @param phone Phone that the call will be sent through. |
2471 | jermar | 300 | * |
301 | * @return Return 0 on success, ELIMIT or EPERM on error. |
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1090 | palkovsky | 302 | */ |
2801 | svoboda | 303 | static int request_preprocess(call_t *call, phone_t *phone) |
1090 | palkovsky | 304 | { |
305 | int newphid; |
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1329 | palkovsky | 306 | size_t size; |
2494 | jermar | 307 | uintptr_t src; |
308 | int rc; |
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1090 | palkovsky | 309 | |
310 | switch (IPC_GET_METHOD(call->data)) { |
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311 | case IPC_M_CONNECT_ME_TO: |
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312 | newphid = phone_alloc(); |
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313 | if (newphid < 0) |
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314 | return ELIMIT; |
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2638 | jermar | 315 | /* Set arg5 for server */ |
2635 | cejka | 316 | IPC_SET_ARG5(call->data, (unative_t) &TASK->phones[newphid]); |
1090 | palkovsky | 317 | call->flags |= IPC_CALL_CONN_ME_TO; |
2098 | decky | 318 | call->priv = newphid; |
1090 | palkovsky | 319 | break; |
2677 | jermar | 320 | case IPC_M_SHARE_OUT: |
2556 | jermar | 321 | size = as_area_get_size(IPC_GET_ARG1(call->data)); |
2471 | jermar | 322 | if (!size) |
1329 | palkovsky | 323 | return EPERM; |
1417 | jermar | 324 | IPC_SET_ARG2(call->data, size); |
1329 | palkovsky | 325 | break; |
2662 | jermar | 326 | case IPC_M_DATA_READ: |
327 | size = IPC_GET_ARG2(call->data); |
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328 | if ((size <= 0 || (size > DATA_XFER_LIMIT))) |
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329 | return ELIMIT; |
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330 | break; |
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2660 | jermar | 331 | case IPC_M_DATA_WRITE: |
2676 | jermar | 332 | src = IPC_GET_ARG1(call->data); |
333 | size = IPC_GET_ARG2(call->data); |
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2494 | jermar | 334 | |
2660 | jermar | 335 | if ((size <= 0) || (size > DATA_XFER_LIMIT)) |
2494 | jermar | 336 | return ELIMIT; |
337 | |||
338 | call->buffer = (uint8_t *) malloc(size, 0); |
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339 | rc = copy_from_uspace(call->buffer, (void *) src, size); |
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340 | if (rc != 0) { |
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341 | free(call->buffer); |
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342 | return rc; |
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343 | } |
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344 | break; |
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3431 | svoboda | 345 | #ifdef CONFIG_UDEBUG |
2812 | svoboda | 346 | case IPC_M_DEBUG_ALL: |
2892 | svoboda | 347 | return udebug_request_preprocess(call, phone); |
3431 | svoboda | 348 | #endif |
1090 | palkovsky | 349 | default: |
350 | break; |
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351 | } |
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352 | return 0; |
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353 | } |
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354 | |||
2471 | jermar | 355 | /******************************************************************************* |
356 | * Functions called to process received call/answer before passing it to uspace. |
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357 | *******************************************************************************/ |
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358 | |||
359 | /** Do basic kernel processing of received call answer. |
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360 | * |
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361 | * @param call Call structure with the answer. |
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1027 | palkovsky | 362 | */ |
1090 | palkovsky | 363 | static void process_answer(call_t *call) |
1027 | palkovsky | 364 | { |
2745 | decky | 365 | if (((native_t) IPC_GET_RETVAL(call->data) == EHANGUP) && |
2359 | jermar | 366 | (call->flags & IPC_CALL_FORWARDED)) |
1088 | palkovsky | 367 | IPC_SET_RETVAL(call->data, EFORWARD); |
1090 | palkovsky | 368 | |
369 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
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370 | if (IPC_GET_RETVAL(call->data)) |
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2098 | decky | 371 | phone_dealloc(call->priv); |
1090 | palkovsky | 372 | else |
2635 | cejka | 373 | IPC_SET_ARG5(call->data, call->priv); |
1090 | palkovsky | 374 | } |
2662 | jermar | 375 | |
376 | if (call->buffer) { |
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377 | /* This must be an affirmative answer to IPC_M_DATA_READ. */ |
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2812 | svoboda | 378 | /* or IPC_M_DEBUG_ALL/UDEBUG_M_MEM_READ... */ |
2662 | jermar | 379 | uintptr_t dst = IPC_GET_ARG1(call->data); |
380 | size_t size = IPC_GET_ARG2(call->data); |
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381 | int rc = copy_to_uspace((void *) dst, call->buffer, size); |
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382 | if (rc) |
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383 | IPC_SET_RETVAL(call->data, rc); |
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384 | free(call->buffer); |
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385 | call->buffer = NULL; |
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386 | } |
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1027 | palkovsky | 387 | } |
388 | |||
2471 | jermar | 389 | /** Do basic kernel processing of received call request. |
1027 | palkovsky | 390 | * |
2471 | jermar | 391 | * @param box Destination answerbox structure. |
392 | * @param call Call structure with the request. |
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393 | * |
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394 | * @return Return 0 if the call should be passed to userspace. |
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395 | * Return -1 if the call should be ignored. |
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1027 | palkovsky | 396 | */ |
2359 | jermar | 397 | static int process_request(answerbox_t *box, call_t *call) |
1027 | palkovsky | 398 | { |
399 | int phoneid; |
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400 | |||
1086 | palkovsky | 401 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
1040 | palkovsky | 402 | phoneid = phone_alloc(); |
1027 | palkovsky | 403 | if (phoneid < 0) { /* Failed to allocate phone */ |
404 | IPC_SET_RETVAL(call->data, ELIMIT); |
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2471 | jermar | 405 | ipc_answer(box, call); |
1027 | palkovsky | 406 | return -1; |
407 | } |
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2637 | cejka | 408 | IPC_SET_ARG5(call->data, phoneid); |
2801 | svoboda | 409 | } |
410 | switch (IPC_GET_METHOD(call->data)) { |
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2812 | svoboda | 411 | case IPC_M_DEBUG_ALL: |
2801 | svoboda | 412 | return -1; |
413 | default: |
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414 | break; |
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415 | } |
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1027 | palkovsky | 416 | return 0; |
417 | } |
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418 | |||
2471 | jermar | 419 | /** Make a fast call over IPC, wait for reply and return to user. |
1027 | palkovsky | 420 | * |
2615 | jermar | 421 | * This function can handle only three arguments of payload, but is faster than |
422 | * the generic function (i.e. sys_ipc_call_sync_slow()). |
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2471 | jermar | 423 | * |
424 | * @param phoneid Phone handle for the call. |
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425 | * @param method Method of the call. |
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426 | * @param arg1 Service-defined payload argument. |
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2615 | jermar | 427 | * @param arg2 Service-defined payload argument. |
428 | * @param arg3 Service-defined payload argument. |
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2471 | jermar | 429 | * @param data Address of userspace structure where the reply call will |
430 | * be stored. |
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431 | * |
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432 | * @return Returns 0 on success. |
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433 | * Return ENOENT if there is no such phone handle. |
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1027 | palkovsky | 434 | */ |
2359 | jermar | 435 | unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method, |
2615 | jermar | 436 | unative_t arg1, unative_t arg2, unative_t arg3, ipc_data_t *data) |
1027 | palkovsky | 437 | { |
438 | call_t call; |
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439 | phone_t *phone; |
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1090 | palkovsky | 440 | int res; |
2617 | jermar | 441 | int rc; |
3424 | svoboda | 442 | |
1084 | palkovsky | 443 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
1027 | palkovsky | 444 | |
1084 | palkovsky | 445 | ipc_call_static_init(&call); |
1027 | palkovsky | 446 | IPC_SET_METHOD(call.data, method); |
447 | IPC_SET_ARG1(call.data, arg1); |
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2615 | jermar | 448 | IPC_SET_ARG2(call.data, arg2); |
449 | IPC_SET_ARG3(call.data, arg3); |
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2620 | jermar | 450 | /* |
451 | * To achieve deterministic behavior, zero out arguments that are beyond |
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452 | * the limits of the fast version. |
||
453 | */ |
||
454 | IPC_SET_ARG4(call.data, 0); |
||
455 | IPC_SET_ARG5(call.data, 0); |
||
1027 | palkovsky | 456 | |
2801 | svoboda | 457 | if (!(res = request_preprocess(&call, phone))) { |
3425 | svoboda | 458 | rc = ipc_call_sync(phone, &call); |
459 | if (rc != EOK) |
||
460 | return rc; |
||
1090 | palkovsky | 461 | process_answer(&call); |
2471 | jermar | 462 | } else { |
1090 | palkovsky | 463 | IPC_SET_RETVAL(call.data, res); |
2471 | jermar | 464 | } |
2617 | jermar | 465 | rc = STRUCT_TO_USPACE(&data->args, &call.data.args); |
466 | if (rc != 0) |
||
467 | return rc; |
||
1027 | palkovsky | 468 | |
469 | return 0; |
||
470 | } |
||
471 | |||
2471 | jermar | 472 | /** Make a synchronous IPC call allowing to transmit the entire payload. |
473 | * |
||
474 | * @param phoneid Phone handle for the call. |
||
475 | * @param question Userspace address of call data with the request. |
||
2494 | jermar | 476 | * @param reply Userspace address of call data where to store the |
477 | * answer. |
||
2471 | jermar | 478 | * |
479 | * @return Zero on success or an error code. |
||
480 | */ |
||
2615 | jermar | 481 | unative_t sys_ipc_call_sync_slow(unative_t phoneid, ipc_data_t *question, |
2359 | jermar | 482 | ipc_data_t *reply) |
1027 | palkovsky | 483 | { |
484 | call_t call; |
||
485 | phone_t *phone; |
||
1090 | palkovsky | 486 | int res; |
1288 | jermar | 487 | int rc; |
1027 | palkovsky | 488 | |
1084 | palkovsky | 489 | ipc_call_static_init(&call); |
2359 | jermar | 490 | rc = copy_from_uspace(&call.data.args, &question->args, |
491 | sizeof(call.data.args)); |
||
1288 | jermar | 492 | if (rc != 0) |
1780 | jermar | 493 | return (unative_t) rc; |
1040 | palkovsky | 494 | |
1084 | palkovsky | 495 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
1072 | palkovsky | 496 | |
2801 | svoboda | 497 | if (!(res = request_preprocess(&call, phone))) { |
3425 | svoboda | 498 | rc = ipc_call_sync(phone, &call); |
499 | if (rc != EOK) |
||
500 | return rc; |
||
1090 | palkovsky | 501 | process_answer(&call); |
502 | } else |
||
503 | IPC_SET_RETVAL(call.data, res); |
||
1027 | palkovsky | 504 | |
1288 | jermar | 505 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
506 | if (rc != 0) |
||
507 | return rc; |
||
1027 | palkovsky | 508 | |
509 | return 0; |
||
510 | } |
||
511 | |||
2471 | jermar | 512 | /** Check that the task did not exceed the allowed limit of asynchronous calls. |
1027 | palkovsky | 513 | * |
2471 | jermar | 514 | * @return Return 0 if limit not reached or -1 if limit exceeded. |
1027 | palkovsky | 515 | */ |
516 | static int check_call_limit(void) |
||
517 | { |
||
518 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
||
519 | atomic_dec(&TASK->active_calls); |
||
520 | return -1; |
||
521 | } |
||
522 | return 0; |
||
523 | } |
||
524 | |||
2471 | jermar | 525 | /** Make a fast asynchronous call over IPC. |
1027 | palkovsky | 526 | * |
2618 | jermar | 527 | * This function can only handle four arguments of payload, but is faster than |
528 | * the generic function sys_ipc_call_async_slow(). |
||
2471 | jermar | 529 | * |
530 | * @param phoneid Phone handle for the call. |
||
531 | * @param method Method of the call. |
||
532 | * @param arg1 Service-defined payload argument. |
||
533 | * @param arg2 Service-defined payload argument. |
||
2618 | jermar | 534 | * @param arg3 Service-defined payload argument. |
535 | * @param arg4 Service-defined payload argument. |
||
2471 | jermar | 536 | * |
537 | * @return Return call hash on success. |
||
538 | * Return IPC_CALLRET_FATAL in case of a fatal error and |
||
539 | * IPC_CALLRET_TEMPORARY if there are too many pending |
||
540 | * asynchronous requests; answers should be handled first. |
||
1027 | palkovsky | 541 | */ |
2359 | jermar | 542 | unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method, |
2618 | jermar | 543 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
1027 | palkovsky | 544 | { |
545 | call_t *call; |
||
546 | phone_t *phone; |
||
1090 | palkovsky | 547 | int res; |
1027 | palkovsky | 548 | |
549 | if (check_call_limit()) |
||
550 | return IPC_CALLRET_TEMPORARY; |
||
551 | |||
1090 | palkovsky | 552 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
1072 | palkovsky | 553 | |
1258 | palkovsky | 554 | call = ipc_call_alloc(0); |
1027 | palkovsky | 555 | IPC_SET_METHOD(call->data, method); |
556 | IPC_SET_ARG1(call->data, arg1); |
||
557 | IPC_SET_ARG2(call->data, arg2); |
||
2618 | jermar | 558 | IPC_SET_ARG3(call->data, arg3); |
559 | IPC_SET_ARG4(call->data, arg4); |
||
2620 | jermar | 560 | /* |
561 | * To achieve deterministic behavior, zero out arguments that are beyond |
||
562 | * the limits of the fast version. |
||
563 | */ |
||
564 | IPC_SET_ARG5(call->data, 0); |
||
1027 | palkovsky | 565 | |
2801 | svoboda | 566 | if (!(res = request_preprocess(call, phone))) |
1090 | palkovsky | 567 | ipc_call(phone, call); |
568 | else |
||
569 | ipc_backsend_err(phone, call, res); |
||
1027 | palkovsky | 570 | |
1780 | jermar | 571 | return (unative_t) call; |
1027 | palkovsky | 572 | } |
573 | |||
2471 | jermar | 574 | /** Make an asynchronous IPC call allowing to transmit the entire payload. |
1027 | palkovsky | 575 | * |
2471 | jermar | 576 | * @param phoneid Phone handle for the call. |
577 | * @param data Userspace address of call data with the request. |
||
578 | * |
||
579 | * @return See sys_ipc_call_async_fast(). |
||
1027 | palkovsky | 580 | */ |
2618 | jermar | 581 | unative_t sys_ipc_call_async_slow(unative_t phoneid, ipc_data_t *data) |
1027 | palkovsky | 582 | { |
583 | call_t *call; |
||
584 | phone_t *phone; |
||
1090 | palkovsky | 585 | int res; |
1288 | jermar | 586 | int rc; |
1027 | palkovsky | 587 | |
1072 | palkovsky | 588 | if (check_call_limit()) |
589 | return IPC_CALLRET_TEMPORARY; |
||
590 | |||
1090 | palkovsky | 591 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
1027 | palkovsky | 592 | |
1258 | palkovsky | 593 | call = ipc_call_alloc(0); |
2359 | jermar | 594 | rc = copy_from_uspace(&call->data.args, &data->args, |
595 | sizeof(call->data.args)); |
||
1293 | palkovsky | 596 | if (rc != 0) { |
597 | ipc_call_free(call); |
||
1780 | jermar | 598 | return (unative_t) rc; |
1293 | palkovsky | 599 | } |
2801 | svoboda | 600 | if (!(res = request_preprocess(call, phone))) |
1090 | palkovsky | 601 | ipc_call(phone, call); |
602 | else |
||
603 | ipc_backsend_err(phone, call, res); |
||
1040 | palkovsky | 604 | |
1780 | jermar | 605 | return (unative_t) call; |
1027 | palkovsky | 606 | } |
607 | |||
2471 | jermar | 608 | /** Forward a received call to another destination. |
1040 | palkovsky | 609 | * |
2471 | jermar | 610 | * @param callid Hash of the call to forward. |
611 | * @param phoneid Phone handle to use for forwarding. |
||
612 | * @param method New method to use for the forwarded call. |
||
613 | * @param arg1 New value of the first argument for the forwarded call. |
||
2636 | jermar | 614 | * @param arg2 New value of the second argument for the forwarded call. |
2622 | jermar | 615 | * @param mode Flags that specify mode of the forward operation. |
1060 | palkovsky | 616 | * |
2471 | jermar | 617 | * @return Return 0 on succes, otherwise return an error code. |
618 | * |
||
2636 | jermar | 619 | * In case the original method is a system method, ARG1, ARG2 and ARG3 are |
620 | * overwritten in the forwarded message with the new method and the new arg1 and |
||
621 | * arg2, respectively. Otherwise the METHOD, ARG1 and ARG2 are rewritten with |
||
622 | * the new method, arg1 and arg2, respectively. Also note there is a set of |
||
623 | * immutable methods, for which the new method and argument is not set and |
||
624 | * these values are ignored. |
||
2471 | jermar | 625 | * |
2622 | jermar | 626 | * Warning: When implementing support for changing additional payload |
2636 | jermar | 627 | * arguments, make sure that ARG5 is not rewritten for certain |
2622 | jermar | 628 | * system IPC |
1040 | palkovsky | 629 | */ |
1780 | jermar | 630 | unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid, |
2635 | cejka | 631 | unative_t method, unative_t arg1, unative_t arg2, int mode) |
1040 | palkovsky | 632 | { |
633 | call_t *call; |
||
634 | phone_t *phone; |
||
635 | |||
636 | call = get_call(callid); |
||
637 | if (!call) |
||
638 | return ENOENT; |
||
639 | |||
1088 | palkovsky | 640 | call->flags |= IPC_CALL_FORWARDED; |
641 | |||
1084 | palkovsky | 642 | GET_CHECK_PHONE(phone, phoneid, { |
1040 | palkovsky | 643 | IPC_SET_RETVAL(call->data, EFORWARD); |
644 | ipc_answer(&TASK->answerbox, call); |
||
645 | return ENOENT; |
||
3424 | svoboda | 646 | }); |
1040 | palkovsky | 647 | |
2557 | jermar | 648 | if (!method_is_forwardable(IPC_GET_METHOD(call->data))) { |
1040 | palkovsky | 649 | IPC_SET_RETVAL(call->data, EFORWARD); |
650 | ipc_answer(&TASK->answerbox, call); |
||
651 | return EPERM; |
||
652 | } |
||
653 | |||
2557 | jermar | 654 | /* |
655 | * Userspace is not allowed to change method of system methods on |
||
2635 | cejka | 656 | * forward, allow changing ARG1, ARG2 and ARG3 by means of method, |
657 | * arg1 and arg2. |
||
2557 | jermar | 658 | * If the method is immutable, don't change anything. |
1040 | palkovsky | 659 | */ |
2557 | jermar | 660 | if (!method_is_immutable(IPC_GET_METHOD(call->data))) { |
661 | if (method_is_system(IPC_GET_METHOD(call->data))) { |
||
662 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
||
2635 | cejka | 663 | phone_dealloc(IPC_GET_ARG5(call->data)); |
1090 | palkovsky | 664 | |
2557 | jermar | 665 | IPC_SET_ARG1(call->data, method); |
666 | IPC_SET_ARG2(call->data, arg1); |
||
2635 | cejka | 667 | IPC_SET_ARG3(call->data, arg2); |
2557 | jermar | 668 | } else { |
669 | IPC_SET_METHOD(call->data, method); |
||
670 | IPC_SET_ARG1(call->data, arg1); |
||
2635 | cejka | 671 | IPC_SET_ARG2(call->data, arg2); |
2557 | jermar | 672 | } |
1040 | palkovsky | 673 | } |
674 | |||
2622 | jermar | 675 | return ipc_forward(call, phone, &TASK->answerbox, mode); |
1040 | palkovsky | 676 | } |
677 | |||
2471 | jermar | 678 | /** Answer an IPC call - fast version. |
679 | * |
||
680 | * This function can handle only two return arguments of payload, but is faster |
||
681 | * than the generic sys_ipc_answer(). |
||
682 | * |
||
683 | * @param callid Hash of the call to be answered. |
||
684 | * @param retval Return value of the answer. |
||
685 | * @param arg1 Service-defined return value. |
||
686 | * @param arg2 Service-defined return value. |
||
2619 | jermar | 687 | * @param arg3 Service-defined return value. |
688 | * @param arg4 Service-defined return value. |
||
2471 | jermar | 689 | * |
690 | * @return Return 0 on success, otherwise return an error code. |
||
691 | */ |
||
2359 | jermar | 692 | unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, |
2619 | jermar | 693 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
1027 | palkovsky | 694 | { |
695 | call_t *call; |
||
1040 | palkovsky | 696 | ipc_data_t saved_data; |
1088 | palkovsky | 697 | int saveddata = 0; |
1329 | palkovsky | 698 | int rc; |
1027 | palkovsky | 699 | |
1346 | palkovsky | 700 | /* Do not answer notification callids */ |
701 | if (callid & IPC_CALLID_NOTIFICATION) |
||
702 | return 0; |
||
703 | |||
1040 | palkovsky | 704 | call = get_call(callid); |
705 | if (!call) |
||
706 | return ENOENT; |
||
1027 | palkovsky | 707 | |
1088 | palkovsky | 708 | if (answer_need_old(call)) { |
1040 | palkovsky | 709 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
1088 | palkovsky | 710 | saveddata = 1; |
1027 | palkovsky | 711 | } |
712 | |||
713 | IPC_SET_RETVAL(call->data, retval); |
||
714 | IPC_SET_ARG1(call->data, arg1); |
||
715 | IPC_SET_ARG2(call->data, arg2); |
||
2619 | jermar | 716 | IPC_SET_ARG3(call->data, arg3); |
717 | IPC_SET_ARG4(call->data, arg4); |
||
2620 | jermar | 718 | /* |
719 | * To achieve deterministic behavior, zero out arguments that are beyond |
||
720 | * the limits of the fast version. |
||
721 | */ |
||
722 | IPC_SET_ARG5(call->data, 0); |
||
1329 | palkovsky | 723 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
1040 | palkovsky | 724 | |
1027 | palkovsky | 725 | ipc_answer(&TASK->answerbox, call); |
1329 | palkovsky | 726 | return rc; |
1027 | palkovsky | 727 | } |
728 | |||
2471 | jermar | 729 | /** Answer an IPC call. |
730 | * |
||
731 | * @param callid Hash of the call to be answered. |
||
732 | * @param data Userspace address of call data with the answer. |
||
733 | * |
||
734 | * @return Return 0 on success, otherwise return an error code. |
||
735 | */ |
||
2619 | jermar | 736 | unative_t sys_ipc_answer_slow(unative_t callid, ipc_data_t *data) |
1027 | palkovsky | 737 | { |
738 | call_t *call; |
||
1040 | palkovsky | 739 | ipc_data_t saved_data; |
1088 | palkovsky | 740 | int saveddata = 0; |
1288 | jermar | 741 | int rc; |
1027 | palkovsky | 742 | |
1346 | palkovsky | 743 | /* Do not answer notification callids */ |
744 | if (callid & IPC_CALLID_NOTIFICATION) |
||
745 | return 0; |
||
746 | |||
1040 | palkovsky | 747 | call = get_call(callid); |
748 | if (!call) |
||
749 | return ENOENT; |
||
1027 | palkovsky | 750 | |
1088 | palkovsky | 751 | if (answer_need_old(call)) { |
1040 | palkovsky | 752 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
1088 | palkovsky | 753 | saveddata = 1; |
1027 | palkovsky | 754 | } |
1288 | jermar | 755 | rc = copy_from_uspace(&call->data.args, &data->args, |
2359 | jermar | 756 | sizeof(call->data.args)); |
1288 | jermar | 757 | if (rc != 0) |
758 | return rc; |
||
1027 | palkovsky | 759 | |
1329 | palkovsky | 760 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
1027 | palkovsky | 761 | |
762 | ipc_answer(&TASK->answerbox, call); |
||
763 | |||
1329 | palkovsky | 764 | return rc; |
1027 | palkovsky | 765 | } |
766 | |||
2471 | jermar | 767 | /** Hang up a phone. |
1086 | palkovsky | 768 | * |
2471 | jermar | 769 | * @param Phone handle of the phone to be hung up. |
770 | * |
||
771 | * @return Return 0 on success or an error code. |
||
1086 | palkovsky | 772 | */ |
1780 | jermar | 773 | unative_t sys_ipc_hangup(int phoneid) |
1086 | palkovsky | 774 | { |
775 | phone_t *phone; |
||
776 | |||
777 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
||
778 | |||
1591 | palkovsky | 779 | if (ipc_phone_hangup(phone)) |
1086 | palkovsky | 780 | return -1; |
781 | |||
782 | return 0; |
||
783 | } |
||
784 | |||
2471 | jermar | 785 | /** Wait for an incoming IPC call or an answer. |
1027 | palkovsky | 786 | * |
2359 | jermar | 787 | * @param calldata Pointer to buffer where the call/answer data is stored. |
788 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
||
789 | * @param flags Select mode of sleep operation. See waitq_sleep_timeout() |
||
790 | * for explanation. |
||
1364 | jermar | 791 | * |
2471 | jermar | 792 | * @return Hash of the call. |
793 | * If IPC_CALLID_NOTIFICATION bit is set in the hash, the |
||
794 | * call is a notification. IPC_CALLID_ANSWERED denotes an |
||
795 | * answer. |
||
1027 | palkovsky | 796 | */ |
1780 | jermar | 797 | unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags) |
1027 | palkovsky | 798 | { |
799 | call_t *call; |
||
800 | |||
801 | restart: |
||
2359 | jermar | 802 | call = ipc_wait_for_call(&TASK->answerbox, usec, |
803 | flags | SYNCH_FLAGS_INTERRUPTIBLE); |
||
1088 | palkovsky | 804 | if (!call) |
805 | return 0; |
||
1027 | palkovsky | 806 | |
1258 | palkovsky | 807 | if (call->flags & IPC_CALL_NOTIF) { |
808 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
||
1693 | palkovsky | 809 | |
810 | /* Set in_phone_hash to the interrupt counter */ |
||
2098 | decky | 811 | call->data.phone = (void *) call->priv; |
1693 | palkovsky | 812 | |
813 | STRUCT_TO_USPACE(calldata, &call->data); |
||
814 | |||
1258 | palkovsky | 815 | ipc_call_free(call); |
816 | |||
2471 | jermar | 817 | return ((unative_t) call) | IPC_CALLID_NOTIFICATION; |
1258 | palkovsky | 818 | } |
819 | |||
1027 | palkovsky | 820 | if (call->flags & IPC_CALL_ANSWERED) { |
1090 | palkovsky | 821 | process_answer(call); |
1027 | palkovsky | 822 | |
1086 | palkovsky | 823 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
824 | |||
1027 | palkovsky | 825 | atomic_dec(&TASK->active_calls); |
1086 | palkovsky | 826 | |
827 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
||
828 | ipc_call_free(call); |
||
829 | goto restart; |
||
830 | } |
||
831 | |||
832 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
||
1027 | palkovsky | 833 | ipc_call_free(call); |
834 | |||
2471 | jermar | 835 | return ((unative_t) call) | IPC_CALLID_ANSWERED; |
1027 | palkovsky | 836 | } |
1086 | palkovsky | 837 | |
1027 | palkovsky | 838 | if (process_request(&TASK->answerbox, call)) |
839 | goto restart; |
||
1086 | palkovsky | 840 | |
1090 | palkovsky | 841 | /* Include phone address('id') of the caller in the request, |
842 | * copy whole call->data, not only call->data.args */ |
||
1396 | palkovsky | 843 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
844 | return 0; |
||
845 | } |
||
1780 | jermar | 846 | return (unative_t)call; |
1027 | palkovsky | 847 | } |
1258 | palkovsky | 848 | |
2471 | jermar | 849 | /** Connect an IRQ handler to a task. |
1923 | jermar | 850 | * |
2471 | jermar | 851 | * @param inr IRQ number. |
852 | * @param devno Device number. |
||
853 | * @param method Method to be associated with the notification. |
||
854 | * @param ucode Uspace pointer to the top-half pseudocode. |
||
1923 | jermar | 855 | * |
2471 | jermar | 856 | * @return EPERM or a return code returned by ipc_irq_register(). |
1923 | jermar | 857 | */ |
2359 | jermar | 858 | unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method, |
859 | irq_code_t *ucode) |
||
1258 | palkovsky | 860 | { |
1297 | jermar | 861 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
862 | return EPERM; |
||
863 | |||
1923 | jermar | 864 | return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode); |
1258 | palkovsky | 865 | } |
866 | |||
2471 | jermar | 867 | /** Disconnect an IRQ handler from a task. |
1923 | jermar | 868 | * |
2471 | jermar | 869 | * @param inr IRQ number. |
870 | * @param devno Device number. |
||
871 | * |
||
872 | * @return Zero on success or EPERM on error.. |
||
1923 | jermar | 873 | */ |
874 | unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno) |
||
1258 | palkovsky | 875 | { |
1297 | jermar | 876 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
877 | return EPERM; |
||
878 | |||
1923 | jermar | 879 | ipc_irq_unregister(&TASK->answerbox, inr, devno); |
1258 | palkovsky | 880 | |
881 | return 0; |
||
882 | } |
||
1702 | cejka | 883 | |
3424 | svoboda | 884 | #include <console/console.h> |
2801 | svoboda | 885 | |
886 | /** |
||
887 | * Syscall connect to a task by id. |
||
888 | * |
||
889 | * @return Phone id on success, or negative error code. |
||
890 | */ |
||
2808 | svoboda | 891 | unative_t sys_ipc_connect_kbox(sysarg64_t *uspace_taskid_arg) |
2801 | svoboda | 892 | { |
3431 | svoboda | 893 | #ifdef CONFIG_UDEBUG |
2801 | svoboda | 894 | sysarg64_t taskid_arg; |
895 | int rc; |
||
896 | |||
897 | rc = copy_from_uspace(&taskid_arg, uspace_taskid_arg, sizeof(sysarg64_t)); |
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898 | if (rc != 0) |
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899 | return (unative_t) rc; |
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900 | |||
3424 | svoboda | 901 | printf("sys_ipc_connect_kbox(%lld, %d)\n", taskid_arg.value); |
2801 | svoboda | 902 | |
2808 | svoboda | 903 | return ipc_connect_kbox(taskid_arg.value); |
3431 | svoboda | 904 | #else |
905 | return (unative_t) ENOTSUP; |
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906 | #endif |
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2801 | svoboda | 907 | } |
908 | |||
1757 | jermar | 909 | /** @} |
1702 | cejka | 910 | */ |