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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 | #include <ipc.h> |
29 | #include <ipc.h> |
30 | #include <libc.h> |
30 | #include <libc.h> |
31 | #include <malloc.h> |
31 | #include <malloc.h> |
32 | #include <errno.h> |
32 | #include <errno.h> |
33 | #include <list.h> |
33 | #include <list.h> |
34 | #include <stdio.h> |
34 | #include <stdio.h> |
35 | #include <unistd.h> |
35 | #include <unistd.h> |
36 | 36 | ||
37 | /** Structure used for keeping track of sent async msgs |
37 | /** Structure used for keeping track of sent async msgs |
38 | * and queing unsent msgs |
38 | * and queing unsent msgs |
39 | * |
39 | * |
40 | */ |
40 | */ |
41 | typedef struct { |
41 | typedef struct { |
42 | link_t list; |
42 | link_t list; |
43 | 43 | ||
44 | ipc_async_callback_t callback; |
44 | ipc_async_callback_t callback; |
45 | void *private; |
45 | void *private; |
46 | union { |
46 | union { |
47 | ipc_callid_t callid; |
47 | ipc_callid_t callid; |
48 | struct { |
48 | struct { |
49 | int phoneid; |
49 | int phoneid; |
50 | ipc_data_t data; |
50 | ipc_data_t data; |
51 | } msg; |
51 | } msg; |
52 | }u; |
52 | }u; |
53 | } async_call_t; |
53 | } async_call_t; |
54 | 54 | ||
55 | LIST_INITIALIZE(dispatched_calls); |
55 | LIST_INITIALIZE(dispatched_calls); |
56 | LIST_INITIALIZE(queued_calls); |
56 | LIST_INITIALIZE(queued_calls); |
57 | 57 | ||
58 | int ipc_call_sync(int phoneid, ipcarg_t method, ipcarg_t arg1, |
58 | int ipc_call_sync(int phoneid, ipcarg_t method, ipcarg_t arg1, |
59 | ipcarg_t *result) |
59 | ipcarg_t *result) |
60 | { |
60 | { |
61 | ipc_data_t resdata; |
61 | ipc_data_t resdata; |
62 | int callres; |
62 | int callres; |
63 | 63 | ||
64 | callres = __SYSCALL4(SYS_IPC_CALL_SYNC_FAST, phoneid, method, arg1, |
64 | callres = __SYSCALL4(SYS_IPC_CALL_SYNC_FAST, phoneid, method, arg1, |
65 | (sysarg_t)&resdata); |
65 | (sysarg_t)&resdata); |
66 | if (callres) |
66 | if (callres) |
67 | return callres; |
67 | return callres; |
68 | if (result) |
68 | if (result) |
69 | *result = IPC_GET_ARG1(resdata); |
69 | *result = IPC_GET_ARG1(resdata); |
70 | return IPC_GET_RETVAL(resdata); |
70 | return IPC_GET_RETVAL(resdata); |
71 | } |
71 | } |
72 | 72 | ||
73 | int ipc_call_sync_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
73 | int ipc_call_sync_3(int phoneid, ipcarg_t method, ipcarg_t arg1, |
74 | ipcarg_t arg2, ipcarg_t arg3, |
74 | ipcarg_t arg2, ipcarg_t arg3, |
75 | ipcarg_t *result1, ipcarg_t *result2, ipcarg_t *result3) |
75 | ipcarg_t *result1, ipcarg_t *result2, ipcarg_t *result3) |
76 | { |
76 | { |
77 | ipc_data_t data; |
77 | ipc_data_t data; |
78 | int callres; |
78 | int callres; |
79 | 79 | ||
80 | IPC_SET_METHOD(data, method); |
80 | IPC_SET_METHOD(data, method); |
81 | IPC_SET_ARG1(data, arg1); |
81 | IPC_SET_ARG1(data, arg1); |
82 | IPC_SET_ARG2(data, arg2); |
82 | IPC_SET_ARG2(data, arg2); |
83 | IPC_SET_ARG3(data, arg3); |
83 | IPC_SET_ARG3(data, arg3); |
84 | 84 | ||
85 | callres = __SYSCALL3(SYS_IPC_CALL_SYNC, phoneid, (sysarg_t)&data, |
85 | callres = __SYSCALL3(SYS_IPC_CALL_SYNC, phoneid, (sysarg_t)&data, |
86 | (sysarg_t)&data); |
86 | (sysarg_t)&data); |
87 | if (callres) |
87 | if (callres) |
88 | return callres; |
88 | return callres; |
89 | 89 | ||
90 | if (result1) |
90 | if (result1) |
91 | *result1 = IPC_GET_ARG1(data); |
91 | *result1 = IPC_GET_ARG1(data); |
92 | if (result2) |
92 | if (result2) |
93 | *result2 = IPC_GET_ARG2(data); |
93 | *result2 = IPC_GET_ARG2(data); |
94 | if (result3) |
94 | if (result3) |
95 | *result3 = IPC_GET_ARG3(data); |
95 | *result3 = IPC_GET_ARG3(data); |
96 | return IPC_GET_RETVAL(data); |
96 | return IPC_GET_RETVAL(data); |
97 | } |
97 | } |
98 | 98 | ||
99 | /** Syscall to send asynchronous message */ |
99 | /** Syscall to send asynchronous message */ |
100 | static ipc_callid_t _ipc_call_async(int phoneid, ipc_data_t *data) |
100 | static ipc_callid_t _ipc_call_async(int phoneid, ipc_data_t *data) |
101 | { |
101 | { |
102 | return __SYSCALL2(SYS_IPC_CALL_ASYNC, phoneid, (sysarg_t)data); |
102 | return __SYSCALL2(SYS_IPC_CALL_ASYNC, phoneid, (sysarg_t)data); |
103 | } |
103 | } |
104 | 104 | ||
105 | /** Send asynchronous message |
105 | /** Send asynchronous message |
106 | * |
106 | * |
107 | * - if fatal error, call callback handler with proper error code |
107 | * - if fatal error, call callback handler with proper error code |
108 | * - if message cannot be temporarily sent, add to queue |
108 | * - if message cannot be temporarily sent, add to queue |
109 | */ |
109 | */ |
110 | void ipc_call_async_2(int phoneid, ipcarg_t method, ipcarg_t arg1, |
110 | void ipc_call_async_2(int phoneid, ipcarg_t method, ipcarg_t arg1, |
111 | ipcarg_t arg2, void *private, |
111 | ipcarg_t arg2, void *private, |
112 | ipc_async_callback_t callback) |
112 | ipc_async_callback_t callback) |
113 | { |
113 | { |
114 | async_call_t *call; |
114 | async_call_t *call; |
115 | ipc_callid_t callid; |
115 | ipc_callid_t callid; |
116 | 116 | ||
117 | call = malloc(sizeof(*call)); |
117 | call = malloc(sizeof(*call)); |
118 | if (!call) { |
118 | if (!call) { |
119 | callback(private, ENOMEM, NULL); |
119 | callback(private, ENOMEM, NULL); |
120 | return; |
120 | return; |
121 | } |
121 | } |
122 | 122 | ||
123 | callid = __SYSCALL4(SYS_IPC_CALL_ASYNC_FAST, phoneid, method, arg1, arg2); |
123 | callid = __SYSCALL4(SYS_IPC_CALL_ASYNC_FAST, phoneid, method, arg1, arg2); |
124 | if (callid == IPC_CALLRET_FATAL) { |
124 | if (callid == IPC_CALLRET_FATAL) { |
125 | /* Call asynchronous handler with error code */ |
125 | /* Call asynchronous handler with error code */ |
126 | callback(private, ENOENT, NULL); |
126 | callback(private, ENOENT, NULL); |
127 | free(call); |
127 | free(call); |
128 | return; |
128 | return; |
129 | } |
129 | } |
130 | 130 | ||
131 | call->callback = callback; |
131 | call->callback = callback; |
132 | call->private = private; |
132 | call->private = private; |
133 | 133 | ||
134 | if (callid == IPC_CALLRET_TEMPORARY) { |
134 | if (callid == IPC_CALLRET_TEMPORARY) { |
135 | /* Add asynchronous call to queue of non-dispatched async calls */ |
135 | /* Add asynchronous call to queue of non-dispatched async calls */ |
136 | call->u.msg.phoneid = phoneid; |
136 | call->u.msg.phoneid = phoneid; |
137 | IPC_SET_METHOD(call->u.msg.data, method); |
137 | IPC_SET_METHOD(call->u.msg.data, method); |
138 | IPC_SET_ARG1(call->u.msg.data, arg1); |
138 | IPC_SET_ARG1(call->u.msg.data, arg1); |
139 | IPC_SET_ARG2(call->u.msg.data, arg2); |
139 | IPC_SET_ARG2(call->u.msg.data, arg2); |
140 | 140 | ||
141 | list_append(&call->list, &queued_calls); |
141 | list_append(&call->list, &queued_calls); |
142 | return; |
142 | return; |
143 | } |
143 | } |
144 | call->u.callid = callid; |
144 | call->u.callid = callid; |
145 | /* Add call to list of dispatched calls */ |
145 | /* Add call to list of dispatched calls */ |
146 | list_append(&call->list, &dispatched_calls); |
146 | list_append(&call->list, &dispatched_calls); |
147 | } |
147 | } |
148 | 148 | ||
149 | 149 | ||
150 | /** Send answer to a received call */ |
150 | /** Send answer to a received call */ |
151 | void ipc_answer(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1, |
151 | void ipc_answer(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1, |
152 | ipcarg_t arg2) |
152 | ipcarg_t arg2) |
153 | { |
153 | { |
154 | __SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2); |
154 | __SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2); |
155 | } |
155 | } |
156 | 156 | ||
157 | 157 | ||
158 | /** Call syscall function sys_ipc_wait_for_call */ |
158 | /** Call syscall function sys_ipc_wait_for_call */ |
159 | static inline ipc_callid_t _ipc_wait_for_call(ipc_call_t *call, int flags) |
159 | static inline ipc_callid_t _ipc_wait_for_call(ipc_call_t *call, int flags) |
160 | { |
160 | { |
161 | return __SYSCALL3(SYS_IPC_WAIT, (sysarg_t)&call->data, |
161 | return __SYSCALL3(SYS_IPC_WAIT, (sysarg_t)&call->data, |
162 | (sysarg_t)&call->taskid, flags); |
162 | (sysarg_t)&call->taskid, flags); |
163 | } |
163 | } |
164 | 164 | ||
165 | /** Try to dispatch queed calls from async queue */ |
165 | /** Try to dispatch queed calls from async queue */ |
166 | static void try_dispatch_queued_calls(void) |
166 | static void try_dispatch_queued_calls(void) |
167 | { |
167 | { |
168 | async_call_t *call; |
168 | async_call_t *call; |
169 | ipc_callid_t callid; |
169 | ipc_callid_t callid; |
170 | 170 | ||
171 | while (!list_empty(&queued_calls)) { |
171 | while (!list_empty(&queued_calls)) { |
172 | call = list_get_instance(queued_calls.next, async_call_t, |
172 | call = list_get_instance(queued_calls.next, async_call_t, |
173 | list); |
173 | list); |
174 | 174 | ||
175 | callid = _ipc_call_async(call->u.msg.phoneid, |
175 | callid = _ipc_call_async(call->u.msg.phoneid, |
176 | &call->u.msg.data); |
176 | &call->u.msg.data); |
177 | if (callid == IPC_CALLRET_TEMPORARY) |
177 | if (callid == IPC_CALLRET_TEMPORARY) |
178 | break; |
178 | break; |
179 | list_remove(&call->list); |
179 | list_remove(&call->list); |
180 | if (callid == IPC_CALLRET_FATAL) { |
180 | if (callid == IPC_CALLRET_FATAL) { |
181 | call->callback(call->private, ENOENT, NULL); |
181 | call->callback(call->private, ENOENT, NULL); |
182 | free(call); |
182 | free(call); |
183 | } else { |
183 | } else { |
184 | call->u.callid = callid; |
184 | call->u.callid = callid; |
185 | list_append(&call->list, &dispatched_calls); |
185 | list_append(&call->list, &dispatched_calls); |
186 | } |
186 | } |
187 | } |
187 | } |
188 | } |
188 | } |
189 | 189 | ||
190 | /** Handle received answer |
190 | /** Handle received answer |
191 | * |
191 | * |
192 | * TODO: Make it use hash table |
192 | * TODO: Make it use hash table |
193 | * |
193 | * |
194 | * @param callid Callid (with first bit set) of the answered call |
194 | * @param callid Callid (with first bit set) of the answered call |
195 | */ |
195 | */ |
196 | static void handle_answer(ipc_callid_t callid, ipc_data_t *data) |
196 | static void handle_answer(ipc_callid_t callid, ipc_data_t *data) |
197 | { |
197 | { |
198 | link_t *item; |
198 | link_t *item; |
199 | async_call_t *call; |
199 | async_call_t *call; |
200 | 200 | ||
201 | callid &= ~IPC_CALLID_ANSWERED; |
201 | callid &= ~IPC_CALLID_ANSWERED; |
202 | 202 | ||
203 | for (item = dispatched_calls.next; item != &dispatched_calls; |
203 | for (item = dispatched_calls.next; item != &dispatched_calls; |
204 | item = item->next) { |
204 | item = item->next) { |
205 | call = list_get_instance(item, async_call_t, list); |
205 | call = list_get_instance(item, async_call_t, list); |
206 | if (call->u.callid == callid) { |
206 | if (call->u.callid == callid) { |
207 | list_remove(&call->list); |
207 | list_remove(&call->list); |
208 | call->callback(call->private, |
208 | call->callback(call->private, |
209 | IPC_GET_RETVAL(*data), |
209 | IPC_GET_RETVAL(*data), |
210 | data); |
210 | data); |
211 | return; |
211 | return; |
212 | } |
212 | } |
213 | } |
213 | } |
214 | printf("Received unidentified answer: %P!!!\n", callid); |
214 | printf("Received unidentified answer: %P!!!\n", callid); |
215 | } |
215 | } |
216 | 216 | ||
217 | 217 | ||
218 | /** Wait for IPC call and return |
218 | /** Wait for IPC call and return |
219 | * |
219 | * |
220 | * - dispatch ASYNC reoutines in the background |
220 | * - dispatch ASYNC reoutines in the background |
221 | * @param data Space where the message is stored |
221 | * @param data Space where the message is stored |
222 | * @return Callid or 0 if nothing available and started with |
222 | * @return Callid or 0 if nothing available and started with |
223 | * IPC_WAIT_NONBLOCKING |
223 | * IPC_WAIT_NONBLOCKING |
224 | */ |
224 | */ |
225 | ipc_callid_t ipc_wait_for_call(ipc_call_t *call, int flags) |
225 | ipc_callid_t ipc_wait_for_call(ipc_call_t *call, int flags) |
226 | { |
226 | { |
227 | ipc_callid_t callid; |
227 | ipc_callid_t callid; |
228 | 228 | ||
229 | do { |
229 | do { |
230 | try_dispatch_queued_calls(); |
230 | try_dispatch_queued_calls(); |
231 | 231 | ||
232 | callid = _ipc_wait_for_call(call, flags); |
232 | callid = _ipc_wait_for_call(call, flags); |
233 | /* Handle received answers */ |
233 | /* Handle received answers */ |
234 | if (callid & IPC_CALLID_ANSWERED) |
234 | if (callid & IPC_CALLID_ANSWERED) |
235 | handle_answer(callid, &call->data); |
235 | handle_answer(callid, &call->data); |
236 | } while (callid & IPC_CALLID_ANSWERED); |
236 | } while (callid & IPC_CALLID_ANSWERED); |
237 | 237 | ||
238 | return callid; |
238 | return callid; |
239 | } |
239 | } |
240 | 240 | ||
241 | /** Ask destination to do a callback connection */ |
241 | /** Ask destination to do a callback connection */ |
242 | int ipc_connect_to_me(int phoneid, int arg1, int arg2, |
242 | int ipc_connect_to_me(int phoneid, int arg1, int arg2, |
243 | unsigned long long *taskid) |
243 | unsigned long long *taskid) |
244 | { |
244 | { |
245 | return __SYSCALL4(SYS_IPC_CONNECT_TO_ME, phoneid, arg1, arg2, |
245 | return __SYSCALL4(SYS_IPC_CONNECT_TO_ME, phoneid, arg1, arg2, |
246 | (sysarg_t) taskid); |
246 | (sysarg_t) taskid); |
247 | } |
247 | } |
248 | 248 | ||
249 | /** Ask through phone for a new connection to some service */ |
249 | /** Ask through phone for a new connection to some service */ |
250 | int ipc_connect_me_to(int phoneid, int arg1, int arg2) |
250 | int ipc_connect_me_to(int phoneid, int arg1, int arg2) |
251 | { |
251 | { |
252 | return __SYSCALL3(SYS_IPC_CONNECT_ME_TO, phoneid, arg1, arg2); |
252 | return __SYSCALL3(SYS_IPC_CONNECT_ME_TO, phoneid, arg1, arg2); |
253 | } |
253 | } |
254 | 254 | ||
- | 255 | /* Hang up specified phone */ |
|
- | 256 | int ipc_hangup(int phoneid) |
|
- | 257 | { |
|
- | 258 | return __SYSCALL1(SYS_IPC_HANGUP, phoneid); |
|
- | 259 | } |
|
255 | 260 |