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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> |
3445 | jermar | 45 | #include <ipc/kbox.h> |
3438 | svoboda | 46 | #include <udebug/udebug_ipc.h> |
1258 | palkovsky | 47 | #include <arch/interrupt.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) { |
4407 | jermar | 96 | case IPC_M_CONNECTION_CLONE: |
97 | case IPC_M_CONNECT_ME: |
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2494 | jermar | 98 | case IPC_M_PHONE_HUNGUP: |
99 | /* This message is meant only for the original recipient. */ |
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100 | return 0; |
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101 | default: |
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102 | return 1; |
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103 | } |
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1040 | palkovsky | 104 | } |
105 | |||
2557 | jermar | 106 | /** Decide if the message with this method is immutable on forward. |
107 | * |
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2601 | jermar | 108 | * - some system messages may be forwarded but their content cannot be altered |
2557 | jermar | 109 | * |
110 | * @param method Method to be decided. |
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111 | * |
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112 | * @return Return 1 if the method is immutable on forward. |
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113 | * Otherwise return 0. |
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114 | */ |
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115 | static inline int method_is_immutable(unative_t method) |
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116 | { |
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117 | switch (method) { |
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2677 | jermar | 118 | case IPC_M_SHARE_OUT: |
119 | case IPC_M_SHARE_IN: |
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2660 | jermar | 120 | case IPC_M_DATA_WRITE: |
121 | case IPC_M_DATA_READ: |
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2557 | jermar | 122 | return 1; |
123 | break; |
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124 | default: |
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125 | return 0; |
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126 | } |
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127 | } |
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1027 | palkovsky | 128 | |
2557 | jermar | 129 | |
2471 | jermar | 130 | /*********************************************************************** |
131 | * Functions that preprocess answer before sending it to the recepient. |
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132 | ***********************************************************************/ |
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133 | |||
134 | /** Decide if the caller (e.g. ipc_answer()) should save the old call contents |
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135 | * for answer_preprocess(). |
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136 | * |
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137 | * @param call Call structure to be decided. |
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138 | * |
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139 | * @return Return 1 if the old call contents should be saved. |
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140 | * Return 0 otherwise. |
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1027 | palkovsky | 141 | */ |
1088 | palkovsky | 142 | static inline int answer_need_old(call_t *call) |
1027 | palkovsky | 143 | { |
2494 | jermar | 144 | switch (IPC_GET_METHOD(call->data)) { |
4407 | jermar | 145 | case IPC_M_CONNECTION_CLONE: |
146 | case IPC_M_CONNECT_ME: |
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2494 | jermar | 147 | case IPC_M_CONNECT_TO_ME: |
148 | case IPC_M_CONNECT_ME_TO: |
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2677 | jermar | 149 | case IPC_M_SHARE_OUT: |
150 | case IPC_M_SHARE_IN: |
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2660 | jermar | 151 | case IPC_M_DATA_WRITE: |
152 | case IPC_M_DATA_READ: |
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1027 | palkovsky | 153 | return 1; |
2494 | jermar | 154 | default: |
155 | return 0; |
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156 | } |
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1027 | palkovsky | 157 | } |
158 | |||
2471 | jermar | 159 | /** Interpret process answer as control information. |
1428 | palkovsky | 160 | * |
2471 | jermar | 161 | * This function is called directly after sys_ipc_answer(). |
162 | * |
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163 | * @param answer Call structure with the answer. |
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164 | * @param olddata Saved data of the request. |
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165 | * |
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166 | * @return Return 0 on success or an error code. |
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1428 | palkovsky | 167 | */ |
1329 | palkovsky | 168 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
1027 | palkovsky | 169 | { |
170 | int phoneid; |
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171 | |||
2745 | decky | 172 | if ((native_t) IPC_GET_RETVAL(answer->data) == EHANGUP) { |
1141 | palkovsky | 173 | /* In case of forward, hangup the forwared phone, |
174 | * not the originator |
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175 | */ |
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3020 | jermar | 176 | mutex_lock(&answer->data.phone->lock); |
1141 | palkovsky | 177 | spinlock_lock(&TASK->answerbox.lock); |
1568 | palkovsky | 178 | if (answer->data.phone->state == IPC_PHONE_CONNECTED) { |
1573 | palkovsky | 179 | list_remove(&answer->data.phone->link); |
1568 | palkovsky | 180 | answer->data.phone->state = IPC_PHONE_SLAMMED; |
1141 | palkovsky | 181 | } |
182 | spinlock_unlock(&TASK->answerbox.lock); |
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3020 | jermar | 183 | mutex_unlock(&answer->data.phone->lock); |
1088 | palkovsky | 184 | } |
185 | |||
186 | if (!olddata) |
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1329 | palkovsky | 187 | return 0; |
1088 | palkovsky | 188 | |
4407 | jermar | 189 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECTION_CLONE) { |
190 | phoneid = IPC_GET_ARG1(*olddata); |
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191 | phone_t *phone = &TASK->phones[phoneid]; |
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192 | if (IPC_GET_RETVAL(answer->data) != EOK) { |
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193 | /* |
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194 | * The recipient of the cloned phone rejected the offer. |
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195 | * In this case, the connection was established at the |
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196 | * request time and therefore we need to slam the phone. |
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197 | * We don't merely hangup as that would result in |
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198 | * sending IPC_M_HUNGUP to the third party on the |
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199 | * other side of the cloned phone. |
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200 | */ |
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201 | mutex_lock(&phone->lock); |
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202 | if (phone->state == IPC_PHONE_CONNECTED) { |
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203 | spinlock_lock(&phone->callee->lock); |
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204 | list_remove(&phone->link); |
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205 | phone->state = IPC_PHONE_SLAMMED; |
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206 | spinlock_unlock(&phone->callee->lock); |
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207 | } |
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208 | mutex_unlock(&phone->lock); |
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209 | } |
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210 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME) { |
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211 | phone_t *phone = (phone_t *)IPC_GET_ARG5(*olddata); |
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212 | if (IPC_GET_RETVAL(answer->data) != EOK) { |
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213 | /* |
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214 | * The other party on the cloned phoned rejected our |
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215 | * request for connection on the protocol level. |
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216 | * We need to break the connection without sending |
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217 | * IPC_M_HUNGUP back. |
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218 | */ |
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219 | mutex_lock(&phone->lock); |
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220 | if (phone->state == IPC_PHONE_CONNECTED) { |
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221 | spinlock_lock(&phone->callee->lock); |
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222 | list_remove(&phone->link); |
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223 | phone->state = IPC_PHONE_SLAMMED; |
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224 | spinlock_unlock(&phone->callee->lock); |
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225 | } |
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226 | mutex_unlock(&phone->lock); |
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227 | } |
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228 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
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2637 | cejka | 229 | phoneid = IPC_GET_ARG5(*olddata); |
4407 | jermar | 230 | if (IPC_GET_RETVAL(answer->data) != EOK) { |
1027 | palkovsky | 231 | /* The connection was not accepted */ |
232 | phone_dealloc(phoneid); |
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1040 | palkovsky | 233 | } else { |
1090 | palkovsky | 234 | /* The connection was accepted */ |
2359 | jermar | 235 | phone_connect(phoneid, &answer->sender->answerbox); |
2638 | jermar | 236 | /* Set 'phone hash' as arg5 of response */ |
2637 | cejka | 237 | IPC_SET_ARG5(answer->data, |
2359 | jermar | 238 | (unative_t) &TASK->phones[phoneid]); |
1027 | palkovsky | 239 | } |
1086 | palkovsky | 240 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
1060 | palkovsky | 241 | /* If the users accepted call, connect */ |
4407 | jermar | 242 | if (IPC_GET_RETVAL(answer->data) == EOK) { |
2635 | cejka | 243 | ipc_phone_connect((phone_t *) IPC_GET_ARG5(*olddata), |
2359 | jermar | 244 | &TASK->answerbox); |
1060 | palkovsky | 245 | } |
2677 | jermar | 246 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_OUT) { |
2359 | jermar | 247 | if (!IPC_GET_RETVAL(answer->data)) { |
248 | /* Accepted, handle as_area receipt */ |
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1413 | jermar | 249 | ipl_t ipl; |
1461 | palkovsky | 250 | int rc; |
1413 | jermar | 251 | as_t *as; |
252 | |||
253 | ipl = interrupts_disable(); |
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254 | spinlock_lock(&answer->sender->lock); |
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255 | as = answer->sender->as; |
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256 | spinlock_unlock(&answer->sender->lock); |
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257 | interrupts_restore(ipl); |
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258 | |||
2359 | jermar | 259 | rc = as_area_share(as, IPC_GET_ARG1(*olddata), |
260 | IPC_GET_ARG2(*olddata), AS, |
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261 | IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata)); |
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1461 | palkovsky | 262 | IPC_SET_RETVAL(answer->data, rc); |
263 | return rc; |
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1329 | palkovsky | 264 | } |
2677 | jermar | 265 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_IN) { |
1428 | palkovsky | 266 | if (!IPC_GET_RETVAL(answer->data)) { |
267 | ipl_t ipl; |
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268 | as_t *as; |
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1434 | palkovsky | 269 | int rc; |
1428 | palkovsky | 270 | |
271 | ipl = interrupts_disable(); |
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272 | spinlock_lock(&answer->sender->lock); |
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273 | as = answer->sender->as; |
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274 | spinlock_unlock(&answer->sender->lock); |
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275 | interrupts_restore(ipl); |
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276 | |||
2359 | jermar | 277 | rc = as_area_share(AS, IPC_GET_ARG1(answer->data), |
278 | IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata), |
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279 | IPC_GET_ARG2(answer->data)); |
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1434 | palkovsky | 280 | IPC_SET_RETVAL(answer->data, rc); |
1428 | palkovsky | 281 | } |
2662 | jermar | 282 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_READ) { |
283 | ASSERT(!answer->buffer); |
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284 | if (!IPC_GET_RETVAL(answer->data)) { |
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285 | /* The recipient agreed to send data. */ |
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286 | uintptr_t src = IPC_GET_ARG1(answer->data); |
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287 | uintptr_t dst = IPC_GET_ARG1(*olddata); |
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288 | size_t max_size = IPC_GET_ARG2(*olddata); |
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289 | size_t size = IPC_GET_ARG2(answer->data); |
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2934 | jermar | 290 | if (size && size <= max_size) { |
2662 | jermar | 291 | /* |
292 | * Copy the destination VA so that this piece of |
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293 | * information is not lost. |
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294 | */ |
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295 | IPC_SET_ARG1(answer->data, dst); |
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296 | |||
297 | answer->buffer = malloc(size, 0); |
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298 | int rc = copy_from_uspace(answer->buffer, |
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299 | (void *) src, size); |
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300 | if (rc) { |
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301 | IPC_SET_RETVAL(answer->data, rc); |
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302 | free(answer->buffer); |
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303 | answer->buffer = NULL; |
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304 | } |
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2934 | jermar | 305 | } else if (!size) { |
306 | IPC_SET_RETVAL(answer->data, EOK); |
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2662 | jermar | 307 | } else { |
308 | IPC_SET_RETVAL(answer->data, ELIMIT); |
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309 | } |
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310 | } |
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2660 | jermar | 311 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_WRITE) { |
2661 | jermar | 312 | ASSERT(answer->buffer); |
2494 | jermar | 313 | if (!IPC_GET_RETVAL(answer->data)) { |
2662 | jermar | 314 | /* The recipient agreed to receive data. */ |
2494 | jermar | 315 | int rc; |
316 | uintptr_t dst; |
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3332 | jermar | 317 | size_t size; |
318 | size_t max_size; |
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2494 | jermar | 319 | |
3332 | jermar | 320 | dst = (uintptr_t)IPC_GET_ARG1(answer->data); |
321 | size = (size_t)IPC_GET_ARG2(answer->data); |
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322 | max_size = (size_t)IPC_GET_ARG2(*olddata); |
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2494 | jermar | 323 | |
2662 | jermar | 324 | if (size <= max_size) { |
325 | rc = copy_to_uspace((void *) dst, |
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326 | answer->buffer, size); |
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327 | if (rc) |
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328 | IPC_SET_RETVAL(answer->data, rc); |
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329 | } else { |
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330 | IPC_SET_RETVAL(answer->data, ELIMIT); |
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331 | } |
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2494 | jermar | 332 | } |
2661 | jermar | 333 | free(answer->buffer); |
334 | answer->buffer = NULL; |
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1027 | palkovsky | 335 | } |
1329 | palkovsky | 336 | return 0; |
1027 | palkovsky | 337 | } |
338 | |||
2471 | jermar | 339 | /** Called before the request is sent. |
1090 | palkovsky | 340 | * |
2471 | jermar | 341 | * @param call Call structure with the request. |
3438 | svoboda | 342 | * @param phone Phone that the call will be sent through. |
2471 | jermar | 343 | * |
344 | * @return Return 0 on success, ELIMIT or EPERM on error. |
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1090 | palkovsky | 345 | */ |
3438 | svoboda | 346 | static int request_preprocess(call_t *call, phone_t *phone) |
1090 | palkovsky | 347 | { |
348 | int newphid; |
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1329 | palkovsky | 349 | size_t size; |
2494 | jermar | 350 | uintptr_t src; |
351 | int rc; |
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1090 | palkovsky | 352 | |
353 | switch (IPC_GET_METHOD(call->data)) { |
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4407 | jermar | 354 | case IPC_M_CONNECTION_CLONE: { |
355 | phone_t *cloned_phone; |
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356 | GET_CHECK_PHONE(cloned_phone, IPC_GET_ARG1(call->data), |
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357 | return ENOENT); |
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4422 | jermar | 358 | if (phone == cloned_phone) |
359 | return EEXISTS; |
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4407 | jermar | 360 | if (cloned_phone < phone) { |
361 | mutex_lock(&cloned_phone->lock); |
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362 | mutex_lock(&phone->lock); |
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363 | } else { |
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364 | mutex_lock(&phone->lock); |
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365 | mutex_lock(&cloned_phone->lock); |
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366 | } |
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367 | if ((cloned_phone->state != IPC_PHONE_CONNECTED) || |
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368 | phone->state != IPC_PHONE_CONNECTED) { |
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369 | mutex_unlock(&cloned_phone->lock); |
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370 | mutex_unlock(&phone->lock); |
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371 | return EINVAL; |
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372 | } |
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373 | /* |
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374 | * We can be pretty sure now that both tasks exist and we are |
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375 | * connected to them. As we continue to hold the phone locks, |
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376 | * we are effectively preventing them from finishing their |
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377 | * potential cleanup. |
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378 | */ |
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379 | newphid = phone_alloc(phone->callee->task); |
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380 | if (newphid < 0) { |
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381 | mutex_unlock(&cloned_phone->lock); |
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382 | mutex_unlock(&phone->lock); |
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383 | return ELIMIT; |
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384 | } |
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385 | ipc_phone_connect(&phone->callee->task->phones[newphid], |
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386 | cloned_phone->callee); |
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387 | mutex_unlock(&cloned_phone->lock); |
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388 | mutex_unlock(&phone->lock); |
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389 | /* Set the new phone for the callee. */ |
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390 | IPC_SET_ARG1(call->data, newphid); |
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391 | break; |
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392 | } |
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393 | case IPC_M_CONNECT_ME: |
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394 | IPC_SET_ARG5(call->data, (unative_t) phone); |
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395 | break; |
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1090 | palkovsky | 396 | case IPC_M_CONNECT_ME_TO: |
4407 | jermar | 397 | newphid = phone_alloc(TASK); |
1090 | palkovsky | 398 | if (newphid < 0) |
399 | return ELIMIT; |
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2638 | jermar | 400 | /* Set arg5 for server */ |
2635 | cejka | 401 | IPC_SET_ARG5(call->data, (unative_t) &TASK->phones[newphid]); |
1090 | palkovsky | 402 | call->flags |= IPC_CALL_CONN_ME_TO; |
2098 | decky | 403 | call->priv = newphid; |
1090 | palkovsky | 404 | break; |
2677 | jermar | 405 | case IPC_M_SHARE_OUT: |
2556 | jermar | 406 | size = as_area_get_size(IPC_GET_ARG1(call->data)); |
2471 | jermar | 407 | if (!size) |
1329 | palkovsky | 408 | return EPERM; |
1417 | jermar | 409 | IPC_SET_ARG2(call->data, size); |
1329 | palkovsky | 410 | break; |
2662 | jermar | 411 | case IPC_M_DATA_READ: |
412 | size = IPC_GET_ARG2(call->data); |
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413 | if ((size <= 0 || (size > DATA_XFER_LIMIT))) |
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414 | return ELIMIT; |
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415 | break; |
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2660 | jermar | 416 | case IPC_M_DATA_WRITE: |
2676 | jermar | 417 | src = IPC_GET_ARG1(call->data); |
418 | size = IPC_GET_ARG2(call->data); |
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2494 | jermar | 419 | |
4304 | jermar | 420 | if (size > DATA_XFER_LIMIT) |
2494 | jermar | 421 | return ELIMIT; |
422 | |||
423 | call->buffer = (uint8_t *) malloc(size, 0); |
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424 | rc = copy_from_uspace(call->buffer, (void *) src, size); |
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425 | if (rc != 0) { |
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426 | free(call->buffer); |
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427 | return rc; |
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428 | } |
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429 | break; |
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3438 | svoboda | 430 | #ifdef CONFIG_UDEBUG |
431 | case IPC_M_DEBUG_ALL: |
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432 | return udebug_request_preprocess(call, phone); |
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433 | #endif |
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1090 | palkovsky | 434 | default: |
435 | break; |
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436 | } |
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437 | return 0; |
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438 | } |
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439 | |||
2471 | jermar | 440 | /******************************************************************************* |
441 | * Functions called to process received call/answer before passing it to uspace. |
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442 | *******************************************************************************/ |
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443 | |||
444 | /** Do basic kernel processing of received call answer. |
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445 | * |
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446 | * @param call Call structure with the answer. |
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1027 | palkovsky | 447 | */ |
1090 | palkovsky | 448 | static void process_answer(call_t *call) |
1027 | palkovsky | 449 | { |
2745 | decky | 450 | if (((native_t) IPC_GET_RETVAL(call->data) == EHANGUP) && |
2359 | jermar | 451 | (call->flags & IPC_CALL_FORWARDED)) |
1088 | palkovsky | 452 | IPC_SET_RETVAL(call->data, EFORWARD); |
1090 | palkovsky | 453 | |
454 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
||
455 | if (IPC_GET_RETVAL(call->data)) |
||
2098 | decky | 456 | phone_dealloc(call->priv); |
1090 | palkovsky | 457 | else |
2635 | cejka | 458 | IPC_SET_ARG5(call->data, call->priv); |
1090 | palkovsky | 459 | } |
2662 | jermar | 460 | |
461 | if (call->buffer) { |
||
462 | /* This must be an affirmative answer to IPC_M_DATA_READ. */ |
||
3438 | svoboda | 463 | /* or IPC_M_DEBUG_ALL/UDEBUG_M_MEM_READ... */ |
2662 | jermar | 464 | uintptr_t dst = IPC_GET_ARG1(call->data); |
465 | size_t size = IPC_GET_ARG2(call->data); |
||
466 | int rc = copy_to_uspace((void *) dst, call->buffer, size); |
||
467 | if (rc) |
||
468 | IPC_SET_RETVAL(call->data, rc); |
||
469 | free(call->buffer); |
||
470 | call->buffer = NULL; |
||
471 | } |
||
1027 | palkovsky | 472 | } |
473 | |||
2471 | jermar | 474 | /** Do basic kernel processing of received call request. |
1027 | palkovsky | 475 | * |
2471 | jermar | 476 | * @param box Destination answerbox structure. |
477 | * @param call Call structure with the request. |
||
478 | * |
||
479 | * @return Return 0 if the call should be passed to userspace. |
||
480 | * Return -1 if the call should be ignored. |
||
1027 | palkovsky | 481 | */ |
2359 | jermar | 482 | static int process_request(answerbox_t *box, call_t *call) |
1027 | palkovsky | 483 | { |
484 | int phoneid; |
||
485 | |||
1086 | palkovsky | 486 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
4407 | jermar | 487 | phoneid = phone_alloc(TASK); |
1027 | palkovsky | 488 | if (phoneid < 0) { /* Failed to allocate phone */ |
489 | IPC_SET_RETVAL(call->data, ELIMIT); |
||
2471 | jermar | 490 | ipc_answer(box, call); |
1027 | palkovsky | 491 | return -1; |
492 | } |
||
2637 | cejka | 493 | IPC_SET_ARG5(call->data, phoneid); |
3438 | svoboda | 494 | } |
495 | switch (IPC_GET_METHOD(call->data)) { |
||
496 | case IPC_M_DEBUG_ALL: |
||
497 | return -1; |
||
498 | default: |
||
499 | break; |
||
500 | } |
||
1027 | palkovsky | 501 | return 0; |
502 | } |
||
503 | |||
2471 | jermar | 504 | /** Make a fast call over IPC, wait for reply and return to user. |
1027 | palkovsky | 505 | * |
2615 | jermar | 506 | * This function can handle only three arguments of payload, but is faster than |
507 | * the generic function (i.e. sys_ipc_call_sync_slow()). |
||
2471 | jermar | 508 | * |
509 | * @param phoneid Phone handle for the call. |
||
510 | * @param method Method of the call. |
||
511 | * @param arg1 Service-defined payload argument. |
||
2615 | jermar | 512 | * @param arg2 Service-defined payload argument. |
513 | * @param arg3 Service-defined payload argument. |
||
2471 | jermar | 514 | * @param data Address of userspace structure where the reply call will |
515 | * be stored. |
||
516 | * |
||
517 | * @return Returns 0 on success. |
||
518 | * Return ENOENT if there is no such phone handle. |
||
1027 | palkovsky | 519 | */ |
2359 | jermar | 520 | unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method, |
2615 | jermar | 521 | unative_t arg1, unative_t arg2, unative_t arg3, ipc_data_t *data) |
1027 | palkovsky | 522 | { |
523 | call_t call; |
||
524 | phone_t *phone; |
||
1090 | palkovsky | 525 | int res; |
2617 | jermar | 526 | int rc; |
3054 | decky | 527 | |
1084 | palkovsky | 528 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
1027 | palkovsky | 529 | |
1084 | palkovsky | 530 | ipc_call_static_init(&call); |
1027 | palkovsky | 531 | IPC_SET_METHOD(call.data, method); |
532 | IPC_SET_ARG1(call.data, arg1); |
||
2615 | jermar | 533 | IPC_SET_ARG2(call.data, arg2); |
534 | IPC_SET_ARG3(call.data, arg3); |
||
2620 | jermar | 535 | /* |
536 | * To achieve deterministic behavior, zero out arguments that are beyond |
||
537 | * the limits of the fast version. |
||
538 | */ |
||
539 | IPC_SET_ARG4(call.data, 0); |
||
540 | IPC_SET_ARG5(call.data, 0); |
||
1027 | palkovsky | 541 | |
3438 | svoboda | 542 | if (!(res = request_preprocess(&call, phone))) { |
3603 | svoboda | 543 | #ifdef CONFIG_UDEBUG |
544 | udebug_stoppable_begin(); |
||
545 | #endif |
||
3370 | jermar | 546 | rc = ipc_call_sync(phone, &call); |
3603 | svoboda | 547 | #ifdef CONFIG_UDEBUG |
548 | udebug_stoppable_end(); |
||
549 | #endif |
||
3370 | jermar | 550 | if (rc != EOK) |
551 | return rc; |
||
1090 | palkovsky | 552 | process_answer(&call); |
3603 | svoboda | 553 | |
2471 | jermar | 554 | } else { |
1090 | palkovsky | 555 | IPC_SET_RETVAL(call.data, res); |
2471 | jermar | 556 | } |
2617 | jermar | 557 | rc = STRUCT_TO_USPACE(&data->args, &call.data.args); |
558 | if (rc != 0) |
||
559 | return rc; |
||
1027 | palkovsky | 560 | |
561 | return 0; |
||
562 | } |
||
563 | |||
2471 | jermar | 564 | /** Make a synchronous IPC call allowing to transmit the entire payload. |
565 | * |
||
566 | * @param phoneid Phone handle for the call. |
||
567 | * @param question Userspace address of call data with the request. |
||
2494 | jermar | 568 | * @param reply Userspace address of call data where to store the |
569 | * answer. |
||
2471 | jermar | 570 | * |
571 | * @return Zero on success or an error code. |
||
572 | */ |
||
2615 | jermar | 573 | unative_t sys_ipc_call_sync_slow(unative_t phoneid, ipc_data_t *question, |
2359 | jermar | 574 | ipc_data_t *reply) |
1027 | palkovsky | 575 | { |
576 | call_t call; |
||
577 | phone_t *phone; |
||
1090 | palkovsky | 578 | int res; |
1288 | jermar | 579 | int rc; |
1027 | palkovsky | 580 | |
1084 | palkovsky | 581 | ipc_call_static_init(&call); |
2359 | jermar | 582 | rc = copy_from_uspace(&call.data.args, &question->args, |
583 | sizeof(call.data.args)); |
||
1288 | jermar | 584 | if (rc != 0) |
1780 | jermar | 585 | return (unative_t) rc; |
1040 | palkovsky | 586 | |
1084 | palkovsky | 587 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
1072 | palkovsky | 588 | |
3438 | svoboda | 589 | if (!(res = request_preprocess(&call, phone))) { |
3603 | svoboda | 590 | #ifdef CONFIG_UDEBUG |
591 | udebug_stoppable_begin(); |
||
592 | #endif |
||
3370 | jermar | 593 | rc = ipc_call_sync(phone, &call); |
3603 | svoboda | 594 | #ifdef CONFIG_UDEBUG |
595 | udebug_stoppable_end(); |
||
596 | #endif |
||
3370 | jermar | 597 | if (rc != EOK) |
598 | return rc; |
||
1090 | palkovsky | 599 | process_answer(&call); |
600 | } else |
||
601 | IPC_SET_RETVAL(call.data, res); |
||
1027 | palkovsky | 602 | |
1288 | jermar | 603 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
604 | if (rc != 0) |
||
605 | return rc; |
||
1027 | palkovsky | 606 | |
607 | return 0; |
||
608 | } |
||
609 | |||
2471 | jermar | 610 | /** Check that the task did not exceed the allowed limit of asynchronous calls. |
1027 | palkovsky | 611 | * |
2471 | jermar | 612 | * @return Return 0 if limit not reached or -1 if limit exceeded. |
1027 | palkovsky | 613 | */ |
614 | static int check_call_limit(void) |
||
615 | { |
||
616 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
||
617 | atomic_dec(&TASK->active_calls); |
||
618 | return -1; |
||
619 | } |
||
620 | return 0; |
||
621 | } |
||
622 | |||
2471 | jermar | 623 | /** Make a fast asynchronous call over IPC. |
1027 | palkovsky | 624 | * |
2618 | jermar | 625 | * This function can only handle four arguments of payload, but is faster than |
626 | * the generic function sys_ipc_call_async_slow(). |
||
2471 | jermar | 627 | * |
628 | * @param phoneid Phone handle for the call. |
||
629 | * @param method Method of the call. |
||
630 | * @param arg1 Service-defined payload argument. |
||
631 | * @param arg2 Service-defined payload argument. |
||
2618 | jermar | 632 | * @param arg3 Service-defined payload argument. |
633 | * @param arg4 Service-defined payload argument. |
||
2471 | jermar | 634 | * |
635 | * @return Return call hash on success. |
||
636 | * Return IPC_CALLRET_FATAL in case of a fatal error and |
||
637 | * IPC_CALLRET_TEMPORARY if there are too many pending |
||
638 | * asynchronous requests; answers should be handled first. |
||
1027 | palkovsky | 639 | */ |
2359 | jermar | 640 | unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method, |
2618 | jermar | 641 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
1027 | palkovsky | 642 | { |
643 | call_t *call; |
||
644 | phone_t *phone; |
||
1090 | palkovsky | 645 | int res; |
1027 | palkovsky | 646 | |
647 | if (check_call_limit()) |
||
648 | return IPC_CALLRET_TEMPORARY; |
||
649 | |||
1090 | palkovsky | 650 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
1072 | palkovsky | 651 | |
1258 | palkovsky | 652 | call = ipc_call_alloc(0); |
1027 | palkovsky | 653 | IPC_SET_METHOD(call->data, method); |
654 | IPC_SET_ARG1(call->data, arg1); |
||
655 | IPC_SET_ARG2(call->data, arg2); |
||
2618 | jermar | 656 | IPC_SET_ARG3(call->data, arg3); |
657 | IPC_SET_ARG4(call->data, arg4); |
||
2620 | jermar | 658 | /* |
659 | * To achieve deterministic behavior, zero out arguments that are beyond |
||
660 | * the limits of the fast version. |
||
661 | */ |
||
662 | IPC_SET_ARG5(call->data, 0); |
||
1027 | palkovsky | 663 | |
3438 | svoboda | 664 | if (!(res = request_preprocess(call, phone))) |
1090 | palkovsky | 665 | ipc_call(phone, call); |
666 | else |
||
667 | ipc_backsend_err(phone, call, res); |
||
1027 | palkovsky | 668 | |
1780 | jermar | 669 | return (unative_t) call; |
1027 | palkovsky | 670 | } |
671 | |||
2471 | jermar | 672 | /** Make an asynchronous IPC call allowing to transmit the entire payload. |
1027 | palkovsky | 673 | * |
2471 | jermar | 674 | * @param phoneid Phone handle for the call. |
675 | * @param data Userspace address of call data with the request. |
||
676 | * |
||
677 | * @return See sys_ipc_call_async_fast(). |
||
1027 | palkovsky | 678 | */ |
2618 | jermar | 679 | unative_t sys_ipc_call_async_slow(unative_t phoneid, ipc_data_t *data) |
1027 | palkovsky | 680 | { |
681 | call_t *call; |
||
682 | phone_t *phone; |
||
1090 | palkovsky | 683 | int res; |
1288 | jermar | 684 | int rc; |
1027 | palkovsky | 685 | |
1072 | palkovsky | 686 | if (check_call_limit()) |
687 | return IPC_CALLRET_TEMPORARY; |
||
688 | |||
1090 | palkovsky | 689 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
1027 | palkovsky | 690 | |
1258 | palkovsky | 691 | call = ipc_call_alloc(0); |
2359 | jermar | 692 | rc = copy_from_uspace(&call->data.args, &data->args, |
693 | sizeof(call->data.args)); |
||
1293 | palkovsky | 694 | if (rc != 0) { |
695 | ipc_call_free(call); |
||
1780 | jermar | 696 | return (unative_t) rc; |
1293 | palkovsky | 697 | } |
3438 | svoboda | 698 | if (!(res = request_preprocess(call, phone))) |
1090 | palkovsky | 699 | ipc_call(phone, call); |
700 | else |
||
701 | ipc_backsend_err(phone, call, res); |
||
1040 | palkovsky | 702 | |
1780 | jermar | 703 | return (unative_t) call; |
1027 | palkovsky | 704 | } |
705 | |||
3819 | jermar | 706 | /** Forward a received call to another destination - common code for both the |
707 | * fast and the slow version. |
||
1040 | palkovsky | 708 | * |
2471 | jermar | 709 | * @param callid Hash of the call to forward. |
710 | * @param phoneid Phone handle to use for forwarding. |
||
711 | * @param method New method to use for the forwarded call. |
||
712 | * @param arg1 New value of the first argument for the forwarded call. |
||
2636 | jermar | 713 | * @param arg2 New value of the second argument for the forwarded call. |
3819 | jermar | 714 | * @param arg3 New value of the third argument for the forwarded call. |
715 | * @param arg4 New value of the fourth argument for the forwarded call. |
||
716 | * @param arg5 New value of the fifth argument for the forwarded call. |
||
2622 | jermar | 717 | * @param mode Flags that specify mode of the forward operation. |
3819 | jermar | 718 | * @param slow If true, arg3, arg4 and arg5 are considered. Otherwise |
719 | * the function considers only the fast version arguments: |
||
720 | * i.e. arg1 and arg2. |
||
1060 | palkovsky | 721 | * |
2471 | jermar | 722 | * @return Return 0 on succes, otherwise return an error code. |
723 | * |
||
3819 | jermar | 724 | * Warning: Make sure that ARG5 is not rewritten for certain system IPC |
1040 | palkovsky | 725 | */ |
3819 | jermar | 726 | static unative_t sys_ipc_forward_common(unative_t callid, unative_t phoneid, |
727 | unative_t method, unative_t arg1, unative_t arg2, unative_t arg3, |
||
728 | unative_t arg4, unative_t arg5, int mode, bool slow) |
||
1040 | palkovsky | 729 | { |
730 | call_t *call; |
||
731 | phone_t *phone; |
||
732 | |||
733 | call = get_call(callid); |
||
734 | if (!call) |
||
735 | return ENOENT; |
||
3819 | jermar | 736 | |
1088 | palkovsky | 737 | call->flags |= IPC_CALL_FORWARDED; |
738 | |||
1084 | palkovsky | 739 | GET_CHECK_PHONE(phone, phoneid, { |
1040 | palkovsky | 740 | IPC_SET_RETVAL(call->data, EFORWARD); |
741 | ipc_answer(&TASK->answerbox, call); |
||
742 | return ENOENT; |
||
3054 | decky | 743 | }); |
1040 | palkovsky | 744 | |
2557 | jermar | 745 | if (!method_is_forwardable(IPC_GET_METHOD(call->data))) { |
1040 | palkovsky | 746 | IPC_SET_RETVAL(call->data, EFORWARD); |
747 | ipc_answer(&TASK->answerbox, call); |
||
748 | return EPERM; |
||
749 | } |
||
750 | |||
2557 | jermar | 751 | /* |
752 | * Userspace is not allowed to change method of system methods on |
||
3819 | jermar | 753 | * forward, allow changing ARG1, ARG2, ARG3 and ARG4 by means of method, |
754 | * arg1, arg2 and arg3. |
||
2557 | jermar | 755 | * If the method is immutable, don't change anything. |
1040 | palkovsky | 756 | */ |
2557 | jermar | 757 | if (!method_is_immutable(IPC_GET_METHOD(call->data))) { |
758 | if (method_is_system(IPC_GET_METHOD(call->data))) { |
||
759 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
||
2635 | cejka | 760 | phone_dealloc(IPC_GET_ARG5(call->data)); |
1090 | palkovsky | 761 | |
2557 | jermar | 762 | IPC_SET_ARG1(call->data, method); |
763 | IPC_SET_ARG2(call->data, arg1); |
||
2635 | cejka | 764 | IPC_SET_ARG3(call->data, arg2); |
3819 | jermar | 765 | if (slow) { |
766 | IPC_SET_ARG4(call->data, arg3); |
||
767 | /* |
||
768 | * For system methods we deliberately don't |
||
769 | * overwrite ARG5. |
||
770 | */ |
||
771 | } |
||
2557 | jermar | 772 | } else { |
773 | IPC_SET_METHOD(call->data, method); |
||
774 | IPC_SET_ARG1(call->data, arg1); |
||
2635 | cejka | 775 | IPC_SET_ARG2(call->data, arg2); |
3819 | jermar | 776 | if (slow) { |
777 | IPC_SET_ARG3(call->data, arg3); |
||
778 | IPC_SET_ARG4(call->data, arg4); |
||
779 | IPC_SET_ARG5(call->data, arg5); |
||
780 | } |
||
2557 | jermar | 781 | } |
1040 | palkovsky | 782 | } |
783 | |||
2622 | jermar | 784 | return ipc_forward(call, phone, &TASK->answerbox, mode); |
1040 | palkovsky | 785 | } |
786 | |||
3819 | jermar | 787 | /** Forward a received call to another destination - fast version. |
788 | * |
||
789 | * @param callid Hash of the call to forward. |
||
790 | * @param phoneid Phone handle to use for forwarding. |
||
791 | * @param method New method to use for the forwarded call. |
||
792 | * @param arg1 New value of the first argument for the forwarded call. |
||
793 | * @param arg2 New value of the second argument for the forwarded call. |
||
794 | * @param mode Flags that specify mode of the forward operation. |
||
795 | * |
||
796 | * @return Return 0 on succes, otherwise return an error code. |
||
797 | * |
||
798 | * In case the original method is a system method, ARG1, ARG2 and ARG3 are |
||
799 | * overwritten in the forwarded message with the new method and the new |
||
800 | * arg1 and arg2, respectively. Otherwise the METHOD, ARG1 and ARG2 are |
||
801 | * rewritten with the new method, arg1 and arg2, respectively. Also note there |
||
802 | * is a set of immutable methods, for which the new method and arguments are not |
||
803 | * set and these values are ignored. |
||
804 | */ |
||
805 | unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid, |
||
806 | unative_t method, unative_t arg1, unative_t arg2, int mode) |
||
807 | { |
||
808 | return sys_ipc_forward_common(callid, phoneid, method, arg1, arg2, 0, 0, |
||
809 | 0, mode, false); |
||
810 | } |
||
811 | |||
812 | /** Forward a received call to another destination - slow version. |
||
813 | * |
||
814 | * @param callid Hash of the call to forward. |
||
815 | * @param phoneid Phone handle to use for forwarding. |
||
816 | * @param data Userspace address of the new IPC data. |
||
817 | * @param mode Flags that specify mode of the forward operation. |
||
818 | * |
||
819 | * @return Return 0 on succes, otherwise return an error code. |
||
820 | * |
||
821 | * This function is the slow verision of the sys_ipc_forward_fast interface. |
||
822 | * It can copy all five new arguments and the new method from the userspace. |
||
823 | * It naturally extends the functionality of the fast version. For system |
||
824 | * methods, it additionally stores the new value of arg3 to ARG4. For non-system |
||
825 | * methods, it additionally stores the new value of arg3, arg4 and arg5, |
||
826 | * respectively, to ARG3, ARG4 and ARG5, respectively. |
||
827 | */ |
||
828 | unative_t sys_ipc_forward_slow(unative_t callid, unative_t phoneid, |
||
829 | ipc_data_t *data, int mode) |
||
830 | { |
||
831 | ipc_data_t newdata; |
||
832 | int rc; |
||
833 | |||
834 | rc = copy_from_uspace(&newdata.args, &data->args, |
||
835 | sizeof(newdata.args)); |
||
836 | if (rc != 0) |
||
837 | return (unative_t) rc; |
||
838 | |||
839 | return sys_ipc_forward_common(callid, phoneid, |
||
840 | IPC_GET_METHOD(newdata), IPC_GET_ARG1(newdata), |
||
841 | IPC_GET_ARG2(newdata), IPC_GET_ARG3(newdata), |
||
842 | IPC_GET_ARG4(newdata), IPC_GET_ARG5(newdata), mode, true); |
||
843 | } |
||
844 | |||
2471 | jermar | 845 | /** Answer an IPC call - fast version. |
846 | * |
||
847 | * This function can handle only two return arguments of payload, but is faster |
||
848 | * than the generic sys_ipc_answer(). |
||
849 | * |
||
850 | * @param callid Hash of the call to be answered. |
||
851 | * @param retval Return value of the answer. |
||
852 | * @param arg1 Service-defined return value. |
||
853 | * @param arg2 Service-defined return value. |
||
2619 | jermar | 854 | * @param arg3 Service-defined return value. |
855 | * @param arg4 Service-defined return value. |
||
2471 | jermar | 856 | * |
857 | * @return Return 0 on success, otherwise return an error code. |
||
858 | */ |
||
2359 | jermar | 859 | unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, |
2619 | jermar | 860 | unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4) |
1027 | palkovsky | 861 | { |
862 | call_t *call; |
||
1040 | palkovsky | 863 | ipc_data_t saved_data; |
1088 | palkovsky | 864 | int saveddata = 0; |
1329 | palkovsky | 865 | int rc; |
1027 | palkovsky | 866 | |
1346 | palkovsky | 867 | /* Do not answer notification callids */ |
868 | if (callid & IPC_CALLID_NOTIFICATION) |
||
869 | return 0; |
||
870 | |||
1040 | palkovsky | 871 | call = get_call(callid); |
872 | if (!call) |
||
873 | return ENOENT; |
||
1027 | palkovsky | 874 | |
1088 | palkovsky | 875 | if (answer_need_old(call)) { |
1040 | palkovsky | 876 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
1088 | palkovsky | 877 | saveddata = 1; |
1027 | palkovsky | 878 | } |
879 | |||
880 | IPC_SET_RETVAL(call->data, retval); |
||
881 | IPC_SET_ARG1(call->data, arg1); |
||
882 | IPC_SET_ARG2(call->data, arg2); |
||
2619 | jermar | 883 | IPC_SET_ARG3(call->data, arg3); |
884 | IPC_SET_ARG4(call->data, arg4); |
||
2620 | jermar | 885 | /* |
886 | * To achieve deterministic behavior, zero out arguments that are beyond |
||
887 | * the limits of the fast version. |
||
888 | */ |
||
889 | IPC_SET_ARG5(call->data, 0); |
||
1329 | palkovsky | 890 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
1040 | palkovsky | 891 | |
1027 | palkovsky | 892 | ipc_answer(&TASK->answerbox, call); |
1329 | palkovsky | 893 | return rc; |
1027 | palkovsky | 894 | } |
895 | |||
2471 | jermar | 896 | /** Answer an IPC call. |
897 | * |
||
898 | * @param callid Hash of the call to be answered. |
||
899 | * @param data Userspace address of call data with the answer. |
||
900 | * |
||
901 | * @return Return 0 on success, otherwise return an error code. |
||
902 | */ |
||
2619 | jermar | 903 | unative_t sys_ipc_answer_slow(unative_t callid, ipc_data_t *data) |
1027 | palkovsky | 904 | { |
905 | call_t *call; |
||
1040 | palkovsky | 906 | ipc_data_t saved_data; |
1088 | palkovsky | 907 | int saveddata = 0; |
1288 | jermar | 908 | int rc; |
1027 | palkovsky | 909 | |
1346 | palkovsky | 910 | /* Do not answer notification callids */ |
911 | if (callid & IPC_CALLID_NOTIFICATION) |
||
912 | return 0; |
||
913 | |||
1040 | palkovsky | 914 | call = get_call(callid); |
915 | if (!call) |
||
916 | return ENOENT; |
||
1027 | palkovsky | 917 | |
1088 | palkovsky | 918 | if (answer_need_old(call)) { |
1040 | palkovsky | 919 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
1088 | palkovsky | 920 | saveddata = 1; |
1027 | palkovsky | 921 | } |
1288 | jermar | 922 | rc = copy_from_uspace(&call->data.args, &data->args, |
2359 | jermar | 923 | sizeof(call->data.args)); |
1288 | jermar | 924 | if (rc != 0) |
925 | return rc; |
||
1027 | palkovsky | 926 | |
1329 | palkovsky | 927 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
1027 | palkovsky | 928 | |
929 | ipc_answer(&TASK->answerbox, call); |
||
930 | |||
1329 | palkovsky | 931 | return rc; |
1027 | palkovsky | 932 | } |
933 | |||
2471 | jermar | 934 | /** Hang up a phone. |
1086 | palkovsky | 935 | * |
2471 | jermar | 936 | * @param Phone handle of the phone to be hung up. |
937 | * |
||
938 | * @return Return 0 on success or an error code. |
||
1086 | palkovsky | 939 | */ |
1780 | jermar | 940 | unative_t sys_ipc_hangup(int phoneid) |
1086 | palkovsky | 941 | { |
942 | phone_t *phone; |
||
943 | |||
944 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
||
945 | |||
1591 | palkovsky | 946 | if (ipc_phone_hangup(phone)) |
1086 | palkovsky | 947 | return -1; |
948 | |||
949 | return 0; |
||
950 | } |
||
951 | |||
2471 | jermar | 952 | /** Wait for an incoming IPC call or an answer. |
1027 | palkovsky | 953 | * |
2359 | jermar | 954 | * @param calldata Pointer to buffer where the call/answer data is stored. |
955 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
||
956 | * @param flags Select mode of sleep operation. See waitq_sleep_timeout() |
||
957 | * for explanation. |
||
1364 | jermar | 958 | * |
2471 | jermar | 959 | * @return Hash of the call. |
960 | * If IPC_CALLID_NOTIFICATION bit is set in the hash, the |
||
961 | * call is a notification. IPC_CALLID_ANSWERED denotes an |
||
962 | * answer. |
||
1027 | palkovsky | 963 | */ |
1780 | jermar | 964 | unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags) |
1027 | palkovsky | 965 | { |
966 | call_t *call; |
||
967 | |||
3603 | svoboda | 968 | restart: |
969 | |||
970 | #ifdef CONFIG_UDEBUG |
||
971 | udebug_stoppable_begin(); |
||
972 | #endif |
||
2359 | jermar | 973 | call = ipc_wait_for_call(&TASK->answerbox, usec, |
974 | flags | SYNCH_FLAGS_INTERRUPTIBLE); |
||
3603 | svoboda | 975 | |
976 | #ifdef CONFIG_UDEBUG |
||
977 | udebug_stoppable_end(); |
||
978 | #endif |
||
1088 | palkovsky | 979 | if (!call) |
980 | return 0; |
||
1027 | palkovsky | 981 | |
1258 | palkovsky | 982 | if (call->flags & IPC_CALL_NOTIF) { |
983 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
||
1693 | palkovsky | 984 | |
985 | /* Set in_phone_hash to the interrupt counter */ |
||
2098 | decky | 986 | call->data.phone = (void *) call->priv; |
1693 | palkovsky | 987 | |
988 | STRUCT_TO_USPACE(calldata, &call->data); |
||
989 | |||
1258 | palkovsky | 990 | ipc_call_free(call); |
991 | |||
2471 | jermar | 992 | return ((unative_t) call) | IPC_CALLID_NOTIFICATION; |
1258 | palkovsky | 993 | } |
994 | |||
1027 | palkovsky | 995 | if (call->flags & IPC_CALL_ANSWERED) { |
1090 | palkovsky | 996 | process_answer(call); |
1027 | palkovsky | 997 | |
1086 | palkovsky | 998 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
999 | |||
1000 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
||
1001 | ipc_call_free(call); |
||
1002 | goto restart; |
||
3476 | jermar | 1003 | } else { |
1004 | /* |
||
1005 | * Decrement the counter of active calls only if the |
||
1006 | * call is not an answer to IPC_M_PHONE_HUNGUP, |
||
1007 | * which doesn't contribute to the counter. |
||
1008 | */ |
||
1009 | atomic_dec(&TASK->active_calls); |
||
1086 | palkovsky | 1010 | } |
1011 | |||
1012 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
||
1027 | palkovsky | 1013 | ipc_call_free(call); |
1014 | |||
2471 | jermar | 1015 | return ((unative_t) call) | IPC_CALLID_ANSWERED; |
1027 | palkovsky | 1016 | } |
1086 | palkovsky | 1017 | |
1027 | palkovsky | 1018 | if (process_request(&TASK->answerbox, call)) |
1019 | goto restart; |
||
1086 | palkovsky | 1020 | |
1090 | palkovsky | 1021 | /* Include phone address('id') of the caller in the request, |
1022 | * copy whole call->data, not only call->data.args */ |
||
1396 | palkovsky | 1023 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
4041 | jermar | 1024 | /* |
1025 | * The callee will not receive this call and no one else has |
||
1026 | * a chance to answer it. Reply with the EPARTY error code. |
||
4040 | decky | 1027 | */ |
4041 | jermar | 1028 | ipc_data_t saved_data; |
1029 | int saveddata = 0; |
||
1030 | |||
1031 | if (answer_need_old(call)) { |
||
1032 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
||
1033 | saveddata = 1; |
||
1034 | } |
||
1035 | |||
1036 | IPC_SET_RETVAL(call->data, EPARTY); |
||
1037 | (void) answer_preprocess(call, saveddata ? &saved_data : NULL); |
||
1038 | ipc_answer(&TASK->answerbox, call); |
||
1396 | palkovsky | 1039 | return 0; |
1040 | } |
||
1780 | jermar | 1041 | return (unative_t)call; |
1027 | palkovsky | 1042 | } |
1258 | palkovsky | 1043 | |
2471 | jermar | 1044 | /** Connect an IRQ handler to a task. |
1923 | jermar | 1045 | * |
2471 | jermar | 1046 | * @param inr IRQ number. |
1047 | * @param devno Device number. |
||
1048 | * @param method Method to be associated with the notification. |
||
1049 | * @param ucode Uspace pointer to the top-half pseudocode. |
||
1923 | jermar | 1050 | * |
2471 | jermar | 1051 | * @return EPERM or a return code returned by ipc_irq_register(). |
1923 | jermar | 1052 | */ |
2359 | jermar | 1053 | unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method, |
1054 | irq_code_t *ucode) |
||
1258 | palkovsky | 1055 | { |
1297 | jermar | 1056 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
1057 | return EPERM; |
||
1058 | |||
1923 | jermar | 1059 | return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode); |
1258 | palkovsky | 1060 | } |
1061 | |||
2471 | jermar | 1062 | /** Disconnect an IRQ handler from a task. |
1923 | jermar | 1063 | * |
2471 | jermar | 1064 | * @param inr IRQ number. |
1065 | * @param devno Device number. |
||
1066 | * |
||
1067 | * @return Zero on success or EPERM on error.. |
||
1923 | jermar | 1068 | */ |
1069 | unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno) |
||
1258 | palkovsky | 1070 | { |
1297 | jermar | 1071 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
1072 | return EPERM; |
||
1073 | |||
1923 | jermar | 1074 | ipc_irq_unregister(&TASK->answerbox, inr, devno); |
1258 | palkovsky | 1075 | |
1076 | return 0; |
||
1077 | } |
||
1702 | cejka | 1078 | |
3438 | svoboda | 1079 | #include <console/console.h> |
1080 | |||
1081 | /** |
||
1082 | * Syscall connect to a task by id. |
||
1083 | * |
||
1084 | * @return Phone id on success, or negative error code. |
||
1085 | */ |
||
1086 | unative_t sys_ipc_connect_kbox(sysarg64_t *uspace_taskid_arg) |
||
1087 | { |
||
1088 | #ifdef CONFIG_UDEBUG |
||
1089 | sysarg64_t taskid_arg; |
||
1090 | int rc; |
||
1091 | |||
1092 | rc = copy_from_uspace(&taskid_arg, uspace_taskid_arg, sizeof(sysarg64_t)); |
||
1093 | if (rc != 0) |
||
1094 | return (unative_t) rc; |
||
1095 | |||
3441 | svoboda | 1096 | LOG("sys_ipc_connect_kbox(%" PRIu64 ")\n", taskid_arg.value); |
3438 | svoboda | 1097 | |
1098 | return ipc_connect_kbox(taskid_arg.value); |
||
1099 | #else |
||
1100 | return (unative_t) ENOTSUP; |
||
1101 | #endif |
||
1102 | } |
||
1103 | |||
1757 | jermar | 1104 | /** @} |
1702 | cejka | 1105 | */ |