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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup libc |
29 | /** @addtogroup libc |
30 | * @{ |
30 | * @{ |
31 | * @} |
31 | * @} |
32 | */ |
32 | */ |
33 | 33 | ||
34 | /** @addtogroup libcipc IPC |
34 | /** @addtogroup libcipc IPC |
35 | * @brief HelenOS uspace IPC |
35 | * @brief HelenOS uspace IPC |
36 | * @{ |
36 | * @{ |
37 | * @ingroup libc |
37 | * @ingroup libc |
38 | */ |
38 | */ |
39 | /** @file |
39 | /** @file |
40 | */ |
40 | */ |
41 | 41 | ||
42 | #include <ipc/ipc.h> |
42 | #include <ipc/ipc.h> |
43 | #include <libc.h> |
43 | #include <libc.h> |
44 | #include <malloc.h> |
44 | #include <malloc.h> |
45 | #include <errno.h> |
45 | #include <errno.h> |
46 | #include <libadt/list.h> |
46 | #include <libadt/list.h> |
47 | #include <stdio.h> |
47 | #include <stdio.h> |
48 | #include <unistd.h> |
48 | #include <unistd.h> |
49 | #include <futex.h> |
49 | #include <futex.h> |
50 | #include <kernel/synch/synch.h> |
50 | #include <kernel/synch/synch.h> |
51 | #include <async.h> |
51 | #include <async.h> |
52 | #include <psthread.h> |
52 | #include <psthread.h> |
53 | 53 | ||
54 | /** Structure used for keeping track of sent async msgs |
54 | /** Structure used for keeping track of sent async msgs |
55 | * and queing unsent msgs |
55 | * and queing unsent msgs |
56 | * |
56 | * |
57 | */ |
57 | */ |
58 | typedef struct { |
58 | typedef struct { |
59 | link_t list; |
59 | link_t list; |
60 | 60 | ||
61 | ipc_async_callback_t callback; |
61 | ipc_async_callback_t callback; |
62 | void *private; |
62 | void *private; |
63 | union { |
63 | union { |
64 | ipc_callid_t callid; |
64 | ipc_callid_t callid; |
65 | struct { |
65 | struct { |
66 | ipc_call_t data; |
66 | ipc_call_t data; |
67 | int phoneid; |
67 | int phoneid; |
68 | } msg; |
68 | } msg; |
69 | }u; |
69 | }u; |
70 | pstid_t ptid; /**< Thread waiting for sending this msg */ |
70 | pstid_t ptid; /**< Thread waiting for sending this msg */ |
71 | } async_call_t; |
71 | } async_call_t; |
72 | 72 | ||
73 | LIST_INITIALIZE(dispatched_calls); |
73 | LIST_INITIALIZE(dispatched_calls); |
74 | 74 | ||
75 | /* queued_calls is protcted by async_futex, because if the |
75 | /* queued_calls is protcted by async_futex, because if the |
76 | * call cannot be sent into kernel, async framework is used |
76 | * call cannot be sent into kernel, async framework is used |
77 | * automatically |
77 | * automatically |
78 | */ |
78 | */ |
79 | LIST_INITIALIZE(queued_calls); /**< List of async calls that were not accepted |
79 | LIST_INITIALIZE(queued_calls); /**< List of async calls that were not accepted |
80 | * by kernel */ |
80 | * by kernel */ |
81 | 81 | ||
82 | static atomic_t ipc_futex = FUTEX_INITIALIZER; |
82 | static atomic_t ipc_futex = FUTEX_INITIALIZER; |
83 | 83 | ||
84 | int ipc_call_sync(int phoneid, ipcarg_t method, ipcarg_t arg1, |
84 | int ipc_call_sync(int phoneid, ipcarg_t method, ipcarg_t arg1, |
85 | ipcarg_t *result) |
85 | ipcarg_t *result) |
86 | { |
86 | { |
87 | ipc_call_t resdata; |
87 | ipc_call_t resdata; |
88 | int callres; |
88 | int callres; |
89 | 89 | ||
90 | callres = __SYSCALL4(SYS_IPC_CALL_SYNC_FAST, phoneid, method, arg1, |
90 | callres = __SYSCALL4(SYS_IPC_CALL_SYNC_FAST, phoneid, method, arg1, |
91 | (sysarg_t)&resdata); |
91 | (sysarg_t)&resdata); |
92 | if (callres) |
92 | if (callres) |
93 | return callres; |
93 | return callres; |
94 | if (result) |
94 | if (result) |
95 | *result = IPC_GET_ARG1(resdata); |
95 | *result = IPC_GET_ARG1(resdata); |
96 | return IPC_GET_RETVAL(resdata); |
96 | return IPC_GET_RETVAL(resdata); |
97 | } |
97 | } |
98 | 98 | ||
99 | int ipc_call_sync_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
99 | int ipc_call_sync_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
100 | ipcarg_t arg2, ipcarg_t arg3, |
100 | ipcarg_t arg2, ipcarg_t arg3, |
101 | ipcarg_t *result1, ipcarg_t *result2, ipcarg_t *result3) |
101 | ipcarg_t *result1, ipcarg_t *result2, ipcarg_t *result3) |
102 | { |
102 | { |
103 | ipc_call_t data; |
103 | ipc_call_t data; |
104 | int callres; |
104 | int callres; |
105 | 105 | ||
106 | IPC_SET_METHOD(data, method); |
106 | IPC_SET_METHOD(data, method); |
107 | IPC_SET_ARG1(data, arg1); |
107 | IPC_SET_ARG1(data, arg1); |
108 | IPC_SET_ARG2(data, arg2); |
108 | IPC_SET_ARG2(data, arg2); |
109 | IPC_SET_ARG3(data, arg3); |
109 | IPC_SET_ARG3(data, arg3); |
110 | 110 | ||
111 | callres = __SYSCALL3(SYS_IPC_CALL_SYNC, phoneid, (sysarg_t)&data, |
111 | callres = __SYSCALL3(SYS_IPC_CALL_SYNC, phoneid, (sysarg_t)&data, |
112 | (sysarg_t)&data); |
112 | (sysarg_t)&data); |
113 | if (callres) |
113 | if (callres) |
114 | return callres; |
114 | return callres; |
115 | 115 | ||
116 | if (result1) |
116 | if (result1) |
117 | *result1 = IPC_GET_ARG1(data); |
117 | *result1 = IPC_GET_ARG1(data); |
118 | if (result2) |
118 | if (result2) |
119 | *result2 = IPC_GET_ARG2(data); |
119 | *result2 = IPC_GET_ARG2(data); |
120 | if (result3) |
120 | if (result3) |
121 | *result3 = IPC_GET_ARG3(data); |
121 | *result3 = IPC_GET_ARG3(data); |
122 | return IPC_GET_RETVAL(data); |
122 | return IPC_GET_RETVAL(data); |
123 | } |
123 | } |
124 | 124 | ||
125 | /** Syscall to send asynchronous message */ |
125 | /** Syscall to send asynchronous message */ |
126 | static ipc_callid_t _ipc_call_async(int phoneid, ipc_call_t *data) |
126 | static ipc_callid_t _ipc_call_async(int phoneid, ipc_call_t *data) |
127 | { |
127 | { |
128 | return __SYSCALL2(SYS_IPC_CALL_ASYNC, phoneid, (sysarg_t)data); |
128 | return __SYSCALL2(SYS_IPC_CALL_ASYNC, phoneid, (sysarg_t)data); |
129 | } |
129 | } |
130 | 130 | ||
131 | /** Prolog to ipc_async_send functions */ |
131 | /** Prolog to ipc_async_send functions */ |
132 | static inline async_call_t *ipc_prepare_async(void *private, ipc_async_callback_t callback) |
132 | static inline async_call_t *ipc_prepare_async(void *private, ipc_async_callback_t callback) |
133 | { |
133 | { |
134 | async_call_t *call; |
134 | async_call_t *call; |
135 | 135 | ||
136 | call = malloc(sizeof(*call)); |
136 | call = malloc(sizeof(*call)); |
137 | if (!call) { |
137 | if (!call) { |
138 | if (callback) |
138 | if (callback) |
139 | callback(private, ENOMEM, NULL); |
139 | callback(private, ENOMEM, NULL); |
140 | return NULL; |
140 | return NULL; |
141 | } |
141 | } |
142 | call->callback = callback; |
142 | call->callback = callback; |
143 | call->private = private; |
143 | call->private = private; |
144 | 144 | ||
145 | return call; |
145 | return call; |
146 | } |
146 | } |
147 | 147 | ||
148 | /** Epilogue of ipc_async_send functions */ |
148 | /** Epilogue of ipc_async_send functions */ |
149 | static inline void ipc_finish_async(ipc_callid_t callid, int phoneid, |
149 | static inline void ipc_finish_async(ipc_callid_t callid, int phoneid, |
150 | async_call_t *call, int can_preempt) |
150 | async_call_t *call, int can_preempt) |
151 | { |
151 | { |
152 | if (!call) { /* Nothing to do regardless if failed or not */ |
152 | if (!call) { /* Nothing to do regardless if failed or not */ |
153 | futex_up(&ipc_futex); |
153 | futex_up(&ipc_futex); |
154 | return; |
154 | return; |
155 | } |
155 | } |
156 | 156 | ||
157 | if (callid == IPC_CALLRET_FATAL) { |
157 | if (callid == IPC_CALLRET_FATAL) { |
158 | futex_up(&ipc_futex); |
158 | futex_up(&ipc_futex); |
159 | /* Call asynchronous handler with error code */ |
159 | /* Call asynchronous handler with error code */ |
160 | if (call->callback) |
160 | if (call->callback) |
161 | call->callback(call->private, ENOENT, NULL); |
161 | call->callback(call->private, ENOENT, NULL); |
162 | free(call); |
162 | free(call); |
163 | return; |
163 | return; |
164 | } |
164 | } |
165 | 165 | ||
166 | if (callid == IPC_CALLRET_TEMPORARY) { |
166 | if (callid == IPC_CALLRET_TEMPORARY) { |
167 | futex_up(&ipc_futex); |
167 | futex_up(&ipc_futex); |
168 | 168 | ||
169 | call->u.msg.phoneid = phoneid; |
169 | call->u.msg.phoneid = phoneid; |
170 | 170 | ||
171 | futex_down(&async_futex); |
171 | futex_down(&async_futex); |
172 | list_append(&call->list, &queued_calls); |
172 | list_append(&call->list, &queued_calls); |
173 | 173 | ||
174 | if (can_preempt) { |
174 | if (can_preempt) { |
175 | call->ptid = psthread_get_id(); |
175 | call->ptid = psthread_get_id(); |
176 | psthread_schedule_next_adv(PS_TO_MANAGER); |
176 | psthread_schedule_next_adv(PS_TO_MANAGER); |
177 | /* Async futex unlocked by previous call */ |
177 | /* Async futex unlocked by previous call */ |
178 | } else { |
178 | } else { |
179 | call->ptid = 0; |
179 | call->ptid = 0; |
180 | futex_up(&async_futex); |
180 | futex_up(&async_futex); |
181 | } |
181 | } |
182 | return; |
182 | return; |
183 | } |
183 | } |
184 | call->u.callid = callid; |
184 | call->u.callid = callid; |
185 | /* Add call to list of dispatched calls */ |
185 | /* Add call to list of dispatched calls */ |
186 | list_append(&call->list, &dispatched_calls); |
186 | list_append(&call->list, &dispatched_calls); |
187 | futex_up(&ipc_futex); |
187 | futex_up(&ipc_futex); |
188 | 188 | ||
189 | } |
189 | } |
190 | 190 | ||
191 | /** Send asynchronous message |
191 | /** Send asynchronous message |
192 | * |
192 | * |
193 | * - if fatal error, call callback handler with proper error code |
193 | * - if fatal error, call callback handler with proper error code |
194 | * - if message cannot be temporarily sent, add to queue |
194 | * - if message cannot be temporarily sent, add to queue |
195 | */ |
195 | */ |
196 | void ipc_call_async_2(int phoneid, ipcarg_t method, ipcarg_t arg1, |
196 | void ipc_call_async_2(int phoneid, ipcarg_t method, ipcarg_t arg1, |
197 | ipcarg_t arg2, void *private, |
197 | ipcarg_t arg2, void *private, |
198 | ipc_async_callback_t callback, int can_preempt) |
198 | ipc_async_callback_t callback, int can_preempt) |
199 | { |
199 | { |
200 | async_call_t *call = NULL; |
200 | async_call_t *call = NULL; |
201 | ipc_callid_t callid; |
201 | ipc_callid_t callid; |
202 | 202 | ||
203 | if (callback) { |
203 | if (callback) { |
204 | call = ipc_prepare_async(private, callback); |
204 | call = ipc_prepare_async(private, callback); |
205 | if (!call) |
205 | if (!call) |
206 | return; |
206 | return; |
207 | } |
207 | } |
208 | 208 | ||
209 | /* We need to make sure that we get callid before |
209 | /* We need to make sure that we get callid before |
210 | * another thread accesses the queue again */ |
210 | * another thread accesses the queue again */ |
211 | futex_down(&ipc_futex); |
211 | futex_down(&ipc_futex); |
212 | callid = __SYSCALL4(SYS_IPC_CALL_ASYNC_FAST, phoneid, method, arg1, arg2); |
212 | callid = __SYSCALL4(SYS_IPC_CALL_ASYNC_FAST, phoneid, method, arg1, arg2); |
213 | 213 | ||
214 | if (callid == IPC_CALLRET_TEMPORARY) { |
214 | if (callid == IPC_CALLRET_TEMPORARY) { |
215 | if (!call) { |
215 | if (!call) { |
216 | call = ipc_prepare_async(private, callback); |
216 | call = ipc_prepare_async(private, callback); |
217 | if (!call) |
217 | if (!call) |
218 | return; |
218 | return; |
219 | } |
219 | } |
220 | IPC_SET_METHOD(call->u.msg.data, method); |
220 | IPC_SET_METHOD(call->u.msg.data, method); |
221 | IPC_SET_ARG1(call->u.msg.data, arg1); |
221 | IPC_SET_ARG1(call->u.msg.data, arg1); |
222 | IPC_SET_ARG2(call->u.msg.data, arg2); |
222 | IPC_SET_ARG2(call->u.msg.data, arg2); |
223 | } |
223 | } |
224 | ipc_finish_async(callid, phoneid, call, can_preempt); |
224 | ipc_finish_async(callid, phoneid, call, can_preempt); |
225 | } |
225 | } |
226 | 226 | ||
227 | /** Send asynchronous message |
227 | /** Send asynchronous message |
228 | * |
228 | * |
229 | * - if fatal error, call callback handler with proper error code |
229 | * - if fatal error, call callback handler with proper error code |
230 | * - if message cannot be temporarily sent, add to queue |
230 | * - if message cannot be temporarily sent, add to queue |
231 | */ |
231 | */ |
232 | void ipc_call_async_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
232 | void ipc_call_async_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
233 | ipcarg_t arg2, ipcarg_t arg3, void *private, |
233 | ipcarg_t arg2, ipcarg_t arg3, void *private, |
234 | ipc_async_callback_t callback, int can_preempt) |
234 | ipc_async_callback_t callback, int can_preempt) |
235 | { |
235 | { |
236 | async_call_t *call; |
236 | async_call_t *call; |
237 | ipc_callid_t callid; |
237 | ipc_callid_t callid; |
238 | 238 | ||
239 | call = ipc_prepare_async(private, callback); |
239 | call = ipc_prepare_async(private, callback); |
240 | if (!call) |
240 | if (!call) |
241 | return; |
241 | return; |
242 | 242 | ||
243 | IPC_SET_METHOD(call->u.msg.data, method); |
243 | IPC_SET_METHOD(call->u.msg.data, method); |
244 | IPC_SET_ARG1(call->u.msg.data, arg1); |
244 | IPC_SET_ARG1(call->u.msg.data, arg1); |
245 | IPC_SET_ARG2(call->u.msg.data, arg2); |
245 | IPC_SET_ARG2(call->u.msg.data, arg2); |
246 | IPC_SET_ARG3(call->u.msg.data, arg3); |
246 | IPC_SET_ARG3(call->u.msg.data, arg3); |
247 | /* We need to make sure that we get callid before |
247 | /* We need to make sure that we get callid before |
248 | * another thread accesses the queue again */ |
248 | * another thread accesses the queue again */ |
249 | futex_down(&ipc_futex); |
249 | futex_down(&ipc_futex); |
250 | callid = _ipc_call_async(phoneid, &call->u.msg.data); |
250 | callid = _ipc_call_async(phoneid, &call->u.msg.data); |
251 | 251 | ||
252 | ipc_finish_async(callid, phoneid, call, can_preempt); |
252 | ipc_finish_async(callid, phoneid, call, can_preempt); |
253 | } |
253 | } |
254 | 254 | ||
255 | 255 | ||
256 | /** Send a fast answer to a received call. |
256 | /** Send a fast answer to a received call. |
257 | * |
257 | * |
258 | * The fast answer makes use of passing retval and first two arguments in registers. |
258 | * The fast answer makes use of passing retval and first two arguments in registers. |
259 | * If you need to return more, use the ipc_answer() instead. |
259 | * If you need to return more, use the ipc_answer() instead. |
260 | * |
260 | * |
261 | * @param callid ID of the call being answered. |
261 | * @param callid ID of the call being answered. |
262 | * @param retval Return value. |
262 | * @param retval Return value. |
263 | * @param arg1 First return argument. |
263 | * @param arg1 First return argument. |
264 | * @param arg2 Second return argument. |
264 | * @param arg2 Second return argument. |
265 | * |
265 | * |
266 | * @return Zero on success or a value from @ref errno.h on failure. |
266 | * @return Zero on success or a value from @ref errno.h on failure. |
267 | */ |
267 | */ |
268 | ipcarg_t ipc_answer_fast(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1, |
268 | ipcarg_t ipc_answer_fast(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1, |
269 | ipcarg_t arg2) |
269 | ipcarg_t arg2) |
270 | { |
270 | { |
271 | return __SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2); |
271 | return __SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2); |
272 | } |
272 | } |
273 | 273 | ||
274 | /** Send a full answer to a received call. |
274 | /** Send a full answer to a received call. |
275 | * |
275 | * |
276 | * @param callid ID of the call being answered. |
276 | * @param callid ID of the call being answered. |
277 | * @param call Call data. Must be already initialized by the responder. |
277 | * @param call Call data. Must be already initialized by the responder. |
278 | * |
278 | * |
279 | * @return Zero on success or a value from @ref errno.h on failure. |
279 | * @return Zero on success or a value from @ref errno.h on failure. |
280 | */ |
280 | */ |
281 | ipcarg_t ipc_answer(ipc_callid_t callid, ipc_call_t *call) |
281 | ipcarg_t ipc_answer(ipc_callid_t callid, ipc_call_t *call) |
282 | { |
282 | { |
283 | return __SYSCALL2(SYS_IPC_ANSWER, callid, (sysarg_t) call); |
283 | return __SYSCALL2(SYS_IPC_ANSWER, callid, (sysarg_t) call); |
284 | } |
284 | } |
285 | 285 | ||
286 | 286 | ||
287 | /** Try to dispatch queed calls from async queue */ |
287 | /** Try to dispatch queed calls from async queue */ |
288 | static void try_dispatch_queued_calls(void) |
288 | static void try_dispatch_queued_calls(void) |
289 | { |
289 | { |
290 | async_call_t *call; |
290 | async_call_t *call; |
291 | ipc_callid_t callid; |
291 | ipc_callid_t callid; |
292 | 292 | ||
293 | /* TODO: integrate intelligently ipc_futex, so that it |
293 | /* TODO: integrate intelligently ipc_futex, so that it |
294 | * is locked during ipc_call_async, until it is added |
294 | * is locked during ipc_call_async, until it is added |
295 | * to dispatched_calls |
295 | * to dispatched_calls |
296 | */ |
296 | */ |
297 | futex_down(&async_futex); |
297 | futex_down(&async_futex); |
298 | while (!list_empty(&queued_calls)) { |
298 | while (!list_empty(&queued_calls)) { |
299 | call = list_get_instance(queued_calls.next, async_call_t, |
299 | call = list_get_instance(queued_calls.next, async_call_t, |
300 | list); |
300 | list); |
301 | 301 | ||
302 | callid = _ipc_call_async(call->u.msg.phoneid, |
302 | callid = _ipc_call_async(call->u.msg.phoneid, |
303 | &call->u.msg.data); |
303 | &call->u.msg.data); |
304 | if (callid == IPC_CALLRET_TEMPORARY) { |
304 | if (callid == IPC_CALLRET_TEMPORARY) { |
305 | break; |
305 | break; |
306 | } |
306 | } |
307 | list_remove(&call->list); |
307 | list_remove(&call->list); |
308 | 308 | ||
309 | futex_up(&async_futex); |
309 | futex_up(&async_futex); |
310 | if (call->ptid) |
310 | if (call->ptid) |
311 | psthread_add_ready(call->ptid); |
311 | psthread_add_ready(call->ptid); |
312 | 312 | ||
313 | if (callid == IPC_CALLRET_FATAL) { |
313 | if (callid == IPC_CALLRET_FATAL) { |
314 | if (call->callback) |
314 | if (call->callback) |
315 | call->callback(call->private, ENOENT, NULL); |
315 | call->callback(call->private, ENOENT, NULL); |
316 | free(call); |
316 | free(call); |
317 | } else { |
317 | } else { |
318 | call->u.callid = callid; |
318 | call->u.callid = callid; |
319 | futex_down(&ipc_futex); |
319 | futex_down(&ipc_futex); |
320 | list_append(&call->list, &dispatched_calls); |
320 | list_append(&call->list, &dispatched_calls); |
321 | futex_up(&ipc_futex); |
321 | futex_up(&ipc_futex); |
322 | } |
322 | } |
323 | futex_down(&async_futex); |
323 | futex_down(&async_futex); |
324 | } |
324 | } |
325 | futex_up(&async_futex); |
325 | futex_up(&async_futex); |
326 | } |
326 | } |
327 | 327 | ||
328 | /** Handle received answer |
328 | /** Handle received answer |
329 | * |
329 | * |
330 | * TODO: Make it use hash table |
330 | * TODO: Make it use hash table |
331 | * |
331 | * |
332 | * @param callid Callid (with first bit set) of the answered call |
332 | * @param callid Callid (with first bit set) of the answered call |
333 | */ |
333 | */ |
334 | static void handle_answer(ipc_callid_t callid, ipc_call_t *data) |
334 | static void handle_answer(ipc_callid_t callid, ipc_call_t *data) |
335 | { |
335 | { |
336 | link_t *item; |
336 | link_t *item; |
337 | async_call_t *call; |
337 | async_call_t *call; |
338 | 338 | ||
339 | callid &= ~IPC_CALLID_ANSWERED; |
339 | callid &= ~IPC_CALLID_ANSWERED; |
340 | 340 | ||
341 | futex_down(&ipc_futex); |
341 | futex_down(&ipc_futex); |
342 | for (item = dispatched_calls.next; item != &dispatched_calls; |
342 | for (item = dispatched_calls.next; item != &dispatched_calls; |
343 | item = item->next) { |
343 | item = item->next) { |
344 | call = list_get_instance(item, async_call_t, list); |
344 | call = list_get_instance(item, async_call_t, list); |
345 | if (call->u.callid == callid) { |
345 | if (call->u.callid == callid) { |
346 | list_remove(&call->list); |
346 | list_remove(&call->list); |
347 | futex_up(&ipc_futex); |
347 | futex_up(&ipc_futex); |
348 | if (call->callback) |
348 | if (call->callback) |
349 | call->callback(call->private, |
349 | call->callback(call->private, |
350 | IPC_GET_RETVAL(*data), |
350 | IPC_GET_RETVAL(*data), |
351 | data); |
351 | data); |
352 | free(call); |
352 | free(call); |
353 | return; |
353 | return; |
354 | } |
354 | } |
355 | } |
355 | } |
356 | futex_up(&ipc_futex); |
356 | futex_up(&ipc_futex); |
357 | /* We may get here after async_msg, which doesn't register any callback */ |
357 | /* We may get here after async_msg, which doesn't register any callback */ |
358 | } |
358 | } |
359 | 359 | ||
360 | 360 | ||
361 | /** One cycle of ipc wait for call call |
361 | /** One cycle of ipc wait for call call |
362 | * |
362 | * |
363 | * - dispatch ASYNC reoutines in the background |
363 | * - dispatch ASYNC reoutines in the background |
364 | * @param call Space where the message is stored |
364 | * @param call Space where the message is stored |
365 | * @param usec Timeout in microseconds |
365 | * @param usec Timeout in microseconds |
366 | * @param flags Flags passed to SYS_IPC_WAIT (blocking, nonblocking) |
366 | * @param flags Flags passed to SYS_IPC_WAIT (blocking, nonblocking) |
367 | * @return Callid of the answer. |
367 | * @return Callid of the answer. |
368 | */ |
368 | */ |
369 | ipc_callid_t ipc_wait_cycle(ipc_call_t *call, uint32_t usec, int flags) |
369 | ipc_callid_t ipc_wait_cycle(ipc_call_t *call, uint32_t usec, int flags) |
370 | { |
370 | { |
371 | ipc_callid_t callid; |
371 | ipc_callid_t callid; |
372 | 372 | ||
373 | callid = __SYSCALL3(SYS_IPC_WAIT, (sysarg_t) call, usec, flags); |
373 | callid = __SYSCALL3(SYS_IPC_WAIT, (sysarg_t) call, usec, flags); |
374 | /* Handle received answers */ |
374 | /* Handle received answers */ |
375 | if (callid & IPC_CALLID_ANSWERED) { |
375 | if (callid & IPC_CALLID_ANSWERED) { |
376 | handle_answer(callid, call); |
376 | handle_answer(callid, call); |
377 | try_dispatch_queued_calls(); |
377 | try_dispatch_queued_calls(); |
378 | } |
378 | } |
379 | 379 | ||
380 | return callid; |
380 | return callid; |
381 | } |
381 | } |
382 | 382 | ||
383 | /** Wait some time for an IPC call. |
383 | /** Wait some time for an IPC call. |
384 | * |
384 | * |
385 | * - dispatch ASYNC reoutines in the background |
385 | * - dispatch ASYNC reoutines in the background |
386 | * |
386 | * |
387 | * @param call Space where the message is stored |
387 | * @param call Space where the message is stored |
388 | * @param usec Timeout in microseconds. |
388 | * @param usec Timeout in microseconds. |
389 | * @return Callid of the answer. |
389 | * @return Callid of the answer. |
390 | */ |
390 | */ |
391 | ipc_callid_t ipc_wait_for_call_timeout(ipc_call_t *call, uint32_t usec) |
391 | ipc_callid_t ipc_wait_for_call_timeout(ipc_call_t *call, uint32_t usec) |
392 | { |
392 | { |
393 | ipc_callid_t callid; |
393 | ipc_callid_t callid; |
394 | 394 | ||
395 | do { |
395 | do { |
396 | callid = ipc_wait_cycle(call, usec, SYNCH_FLAGS_NONE); |
396 | callid = ipc_wait_cycle(call, usec, SYNCH_FLAGS_NONE); |
397 | } while (callid & IPC_CALLID_ANSWERED); |
397 | } while (callid & IPC_CALLID_ANSWERED); |
398 | 398 | ||
399 | return callid; |
399 | return callid; |
400 | } |
400 | } |
401 | 401 | ||
402 | /** Check if there is an IPC call waiting to be picked up. |
402 | /** Check if there is an IPC call waiting to be picked up. |
403 | * |
403 | * |
404 | * - dispatch ASYNC reoutines in the background |
404 | * - dispatch ASYNC reoutines in the background |
405 | * |
405 | * |
406 | * @param call Space where the message is stored |
406 | * @param call Space where the message is stored |
407 | * @return Callid of the answer. |
407 | * @return Callid of the answer. |
408 | */ |
408 | */ |
409 | ipc_callid_t ipc_trywait_for_call(ipc_call_t *call) |
409 | ipc_callid_t ipc_trywait_for_call(ipc_call_t *call) |
410 | { |
410 | { |
411 | ipc_callid_t callid; |
411 | ipc_callid_t callid; |
412 | 412 | ||
413 | do { |
413 | do { |
414 | callid = ipc_wait_cycle(call, SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NON_BLOCKING); |
414 | callid = ipc_wait_cycle(call, SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NON_BLOCKING); |
415 | } while (callid & IPC_CALLID_ANSWERED); |
415 | } while (callid & IPC_CALLID_ANSWERED); |
416 | 416 | ||
417 | return callid; |
417 | return callid; |
418 | } |
418 | } |
419 | 419 | ||
420 | /** Ask destination to do a callback connection |
420 | /** Ask destination to do a callback connection |
421 | * |
421 | * |
422 | * @return 0 - OK, error code |
422 | * @return 0 - OK, error code |
423 | */ |
423 | */ |
424 | int ipc_connect_to_me(int phoneid, int arg1, int arg2, ipcarg_t *phone) |
424 | int ipc_connect_to_me(int phoneid, int arg1, int arg2, ipcarg_t *phone) |
425 | { |
425 | { |
426 | return ipc_call_sync_3(phoneid, IPC_M_CONNECT_TO_ME, arg1, |
426 | return ipc_call_sync_3(phoneid, IPC_M_CONNECT_TO_ME, arg1, |
427 | arg2, 0, 0, 0, phone); |
427 | arg2, 0, 0, 0, phone); |
428 | } |
428 | } |
429 | 429 | ||
430 | /** Ask through phone for a new connection to some service |
430 | /** Ask through phone for a new connection to some service |
431 | * |
431 | * |
432 | * @return new phoneid - OK, error code |
432 | * @return new phoneid - OK, error code |
433 | */ |
433 | */ |
434 | int ipc_connect_me_to(int phoneid, int arg1, int arg2) |
434 | int ipc_connect_me_to(int phoneid, int arg1, int arg2) |
435 | { |
435 | { |
436 | ipcarg_t newphid; |
436 | ipcarg_t newphid; |
437 | int res; |
437 | int res; |
438 | 438 | ||
439 | res = ipc_call_sync_3(phoneid, IPC_M_CONNECT_ME_TO, arg1, |
439 | res = ipc_call_sync_3(phoneid, IPC_M_CONNECT_ME_TO, arg1, |
440 | arg2, 0, 0, 0, &newphid); |
440 | arg2, 0, 0, 0, &newphid); |
441 | if (res) |
441 | if (res) |
442 | return res; |
442 | return res; |
443 | return newphid; |
443 | return newphid; |
444 | } |
444 | } |
445 | 445 | ||
446 | /* Hang up specified phone */ |
446 | /* Hang up specified phone */ |
447 | int ipc_hangup(int phoneid) |
447 | int ipc_hangup(int phoneid) |
448 | { |
448 | { |
449 | return __SYSCALL1(SYS_IPC_HANGUP, phoneid); |
449 | return __SYSCALL1(SYS_IPC_HANGUP, phoneid); |
450 | } |
450 | } |
451 | 451 | ||
452 | int ipc_register_irq(int irq, irq_code_t *ucode) |
452 | int ipc_register_irq(int irq, irq_code_t *ucode) |
453 | { |
453 | { |
454 | return __SYSCALL2(SYS_IPC_REGISTER_IRQ, irq, (sysarg_t) ucode); |
454 | return __SYSCALL2(SYS_IPC_REGISTER_IRQ, irq, (sysarg_t) ucode); |
455 | } |
455 | } |
456 | 456 | ||
457 | int ipc_unregister_irq(int irq) |
457 | int ipc_unregister_irq(int irq) |
458 | { |
458 | { |
459 | return __SYSCALL1(SYS_IPC_UNREGISTER_IRQ, irq); |
459 | return __SYSCALL1(SYS_IPC_UNREGISTER_IRQ, irq); |
460 | } |
460 | } |
461 | 461 | ||
462 | int ipc_forward_fast(ipc_callid_t callid, int phoneid, int method, ipcarg_t arg1) |
462 | int ipc_forward_fast(ipc_callid_t callid, int phoneid, int method, ipcarg_t arg1) |
463 | { |
463 | { |
464 | return __SYSCALL4(SYS_IPC_FORWARD_FAST, callid, phoneid, method, arg1); |
464 | return __SYSCALL4(SYS_IPC_FORWARD_FAST, callid, phoneid, method, arg1); |
465 | } |
465 | } |
466 | 466 | ||
467 | 467 | ||
468 | 468 | ||
469 | /** @} |
469 | /** @} |
470 | */ |
470 | */ |
471 | 471 | ||
472 | 472 | ||
473 | 473 |