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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 = __SYSCALL2(SYS_IPC_CALL_SYNC, phoneid, (sysarg_t)&data); |
85 | callres = __SYSCALL3(SYS_IPC_CALL_SYNC, phoneid, (sysarg_t)&data, |
- | 86 | (sysarg_t)&data); |
|
86 | if (callres) |
87 | if (callres) |
87 | return callres; |
88 | return callres; |
88 | 89 | ||
89 | if (result1) |
90 | if (result1) |
90 | *result1 = IPC_GET_ARG1(data); |
91 | *result1 = IPC_GET_ARG1(data); |
91 | if (result2) |
92 | if (result2) |
92 | *result2 = IPC_GET_ARG2(data); |
93 | *result2 = IPC_GET_ARG2(data); |
93 | if (result3) |
94 | if (result3) |
94 | *result3 = IPC_GET_ARG3(data); |
95 | *result3 = IPC_GET_ARG3(data); |
95 | return IPC_GET_RETVAL(data); |
96 | return IPC_GET_RETVAL(data); |
96 | } |
97 | } |
97 | 98 | ||
98 | /** Syscall to send asynchronous message */ |
99 | /** Syscall to send asynchronous message */ |
99 | 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) |
100 | { |
101 | { |
101 | return __SYSCALL2(SYS_IPC_CALL_ASYNC, phoneid, (sysarg_t)data); |
102 | return __SYSCALL2(SYS_IPC_CALL_ASYNC, phoneid, (sysarg_t)data); |
102 | } |
103 | } |
103 | 104 | ||
104 | /** Send asynchronous message |
105 | /** Send asynchronous message |
105 | * |
106 | * |
106 | * - if fatal error, call callback handler with proper error code |
107 | * - if fatal error, call callback handler with proper error code |
107 | * - if message cannot be temporarily sent, add to queue |
108 | * - if message cannot be temporarily sent, add to queue |
108 | */ |
109 | */ |
109 | 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, |
110 | ipcarg_t arg2, void *private, |
111 | ipcarg_t arg2, void *private, |
111 | ipc_async_callback_t callback) |
112 | ipc_async_callback_t callback) |
112 | { |
113 | { |
113 | async_call_t *call; |
114 | async_call_t *call; |
114 | ipc_callid_t callid; |
115 | ipc_callid_t callid; |
115 | 116 | ||
116 | call = malloc(sizeof(*call)); |
117 | call = malloc(sizeof(*call)); |
117 | if (!call) { |
118 | if (!call) { |
118 | callback(private, ENOMEM, NULL); |
119 | callback(private, ENOMEM, NULL); |
119 | } |
120 | } |
120 | 121 | ||
121 | callid = __SYSCALL4(SYS_IPC_CALL_ASYNC_FAST, phoneid, method, arg1, arg2); |
122 | callid = __SYSCALL4(SYS_IPC_CALL_ASYNC_FAST, phoneid, method, arg1, arg2); |
122 | if (callid == IPC_CALLRET_FATAL) { |
123 | if (callid == IPC_CALLRET_FATAL) { |
123 | /* Call asynchronous handler with error code */ |
124 | /* Call asynchronous handler with error code */ |
124 | IPC_SET_RETVAL(call->u.msg.data, ENOENT); |
- | |
125 | callback(private, ENOENT, NULL); |
125 | callback(private, ENOENT, NULL); |
126 | free(call); |
126 | free(call); |
127 | return; |
127 | return; |
128 | } |
128 | } |
129 | 129 | ||
130 | call->callback = callback; |
130 | call->callback = callback; |
131 | call->private = private; |
131 | call->private = private; |
132 | 132 | ||
133 | if (callid == IPC_CALLRET_TEMPORARY) { |
133 | if (callid == IPC_CALLRET_TEMPORARY) { |
134 | /* Add asynchronous call to queue of non-dispatched async calls */ |
134 | /* Add asynchronous call to queue of non-dispatched async calls */ |
135 | call->u.msg.phoneid = phoneid; |
135 | call->u.msg.phoneid = phoneid; |
136 | IPC_SET_METHOD(call->u.msg.data, method); |
136 | IPC_SET_METHOD(call->u.msg.data, method); |
137 | IPC_SET_ARG1(call->u.msg.data, arg1); |
137 | IPC_SET_ARG1(call->u.msg.data, arg1); |
138 | IPC_SET_ARG2(call->u.msg.data, arg2); |
138 | IPC_SET_ARG2(call->u.msg.data, arg2); |
139 | 139 | ||
140 | list_append(&call->list, &queued_calls); |
140 | list_append(&call->list, &queued_calls); |
141 | return; |
141 | return; |
142 | } |
142 | } |
143 | call->u.callid = callid; |
143 | call->u.callid = callid; |
144 | /* Add call to list of dispatched calls */ |
144 | /* Add call to list of dispatched calls */ |
145 | list_append(&call->list, &dispatched_calls); |
145 | list_append(&call->list, &dispatched_calls); |
146 | } |
146 | } |
147 | 147 | ||
148 | 148 | ||
149 | /** Send answer to a received call */ |
149 | /** Send answer to a received call */ |
150 | void ipc_answer(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1, |
150 | void ipc_answer(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1, |
151 | ipcarg_t arg2) |
151 | ipcarg_t arg2) |
152 | { |
152 | { |
153 | __SYSCALL4(SYS_IPC_ANSWER, callid, retval, arg1, arg2); |
153 | __SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2); |
154 | } |
154 | } |
155 | 155 | ||
156 | 156 | ||
157 | /** Call syscall function sys_ipc_wait_for_call */ |
157 | /** Call syscall function sys_ipc_wait_for_call */ |
158 | static inline ipc_callid_t _ipc_wait_for_call(ipc_data_t *data, int flags) |
158 | static inline ipc_callid_t _ipc_wait_for_call(ipc_call_t *call, int flags) |
159 | { |
159 | { |
160 | return __SYSCALL2(SYS_IPC_WAIT, (sysarg_t)data, flags); |
160 | return __SYSCALL3(SYS_IPC_WAIT, (sysarg_t)&call->data, |
- | 161 | (sysarg_t)&call->taskid, flags); |
|
161 | } |
162 | } |
162 | 163 | ||
163 | /** Try to dispatch queed calls from async queue */ |
164 | /** Try to dispatch queed calls from async queue */ |
164 | static void try_dispatch_queued_calls(void) |
165 | static void try_dispatch_queued_calls(void) |
165 | { |
166 | { |
166 | async_call_t *call; |
167 | async_call_t *call; |
167 | ipc_callid_t callid; |
168 | ipc_callid_t callid; |
168 | 169 | ||
169 | while (!list_empty(&queued_calls)) { |
170 | while (!list_empty(&queued_calls)) { |
170 | call = list_get_instance(queued_calls.next, async_call_t, |
171 | call = list_get_instance(queued_calls.next, async_call_t, |
171 | list); |
172 | list); |
172 | 173 | ||
173 | callid = _ipc_call_async(call->u.msg.phoneid, |
174 | callid = _ipc_call_async(call->u.msg.phoneid, |
174 | &call->u.msg.data); |
175 | &call->u.msg.data); |
175 | if (callid == IPC_CALLRET_TEMPORARY) |
176 | if (callid == IPC_CALLRET_TEMPORARY) |
176 | break; |
177 | break; |
177 | list_remove(&call->list); |
178 | list_remove(&call->list); |
178 | if (callid == IPC_CALLRET_FATAL) { |
179 | if (callid == IPC_CALLRET_FATAL) { |
179 | call->callback(call->private, ENOENT, NULL); |
180 | call->callback(call->private, ENOENT, NULL); |
180 | free(call); |
181 | free(call); |
181 | } else { |
182 | } else { |
182 | call->u.callid = callid; |
183 | call->u.callid = callid; |
183 | list_append(&call->list, &dispatched_calls); |
184 | list_append(&call->list, &dispatched_calls); |
184 | } |
185 | } |
185 | } |
186 | } |
186 | } |
187 | } |
187 | 188 | ||
188 | /** Handle received answer |
189 | /** Handle received answer |
189 | * |
190 | * |
190 | * TODO: Make it use hash table |
191 | * TODO: Make it use hash table |
191 | * |
192 | * |
192 | * @param callid Callid (with first bit set) of the answered call |
193 | * @param callid Callid (with first bit set) of the answered call |
193 | */ |
194 | */ |
194 | static void handle_answer(ipc_callid_t callid, ipc_data_t *data) |
195 | static void handle_answer(ipc_callid_t callid, ipc_data_t *data) |
195 | { |
196 | { |
196 | link_t *item; |
197 | link_t *item; |
197 | async_call_t *call; |
198 | async_call_t *call; |
198 | 199 | ||
199 | callid &= ~IPC_CALLID_ANSWERED; |
200 | callid &= ~IPC_CALLID_ANSWERED; |
200 | 201 | ||
201 | for (item = dispatched_calls.next; item != &dispatched_calls; |
202 | for (item = dispatched_calls.next; item != &dispatched_calls; |
202 | item = item->next) { |
203 | item = item->next) { |
203 | call = list_get_instance(item, async_call_t, list); |
204 | call = list_get_instance(item, async_call_t, list); |
204 | if (call->u.callid == callid) { |
205 | if (call->u.callid == callid) { |
205 | list_remove(&call->list); |
206 | list_remove(&call->list); |
206 | call->callback(call->private, |
207 | call->callback(call->private, |
207 | IPC_GET_RETVAL(*data), |
208 | IPC_GET_RETVAL(*data), |
208 | data); |
209 | data); |
209 | return; |
210 | return; |
210 | } |
211 | } |
211 | } |
212 | } |
212 | printf("Received unidentified answer: %P!!!\n", callid); |
213 | printf("Received unidentified answer: %P!!!\n", callid); |
213 | } |
214 | } |
214 | 215 | ||
215 | 216 | ||
216 | /** Wait for IPC call and return |
217 | /** Wait for IPC call and return |
217 | * |
218 | * |
218 | * - dispatch ASYNC reoutines in the background |
219 | * - dispatch ASYNC reoutines in the background |
219 | * @param data Space where the message is stored |
220 | * @param data Space where the message is stored |
220 | * @return Callid or 0 if nothing available and started with |
221 | * @return Callid or 0 if nothing available and started with |
221 | * IPC_WAIT_NONBLOCKING |
222 | * IPC_WAIT_NONBLOCKING |
222 | */ |
223 | */ |
223 | int ipc_wait_for_call(ipc_data_t *data, int flags) |
224 | int ipc_wait_for_call(ipc_call_t *call, int flags) |
224 | { |
225 | { |
225 | ipc_callid_t callid; |
226 | ipc_callid_t callid; |
226 | 227 | ||
227 | do { |
228 | do { |
228 | try_dispatch_queued_calls(); |
229 | try_dispatch_queued_calls(); |
229 | 230 | ||
230 | callid = _ipc_wait_for_call(data, flags); |
231 | callid = _ipc_wait_for_call(call, flags); |
231 | /* Handle received answers */ |
232 | /* Handle received answers */ |
232 | if (callid & IPC_CALLID_ANSWERED) |
233 | if (callid & IPC_CALLID_ANSWERED) |
233 | handle_answer(callid, data); |
234 | handle_answer(callid, &call->data); |
234 | } while (callid & IPC_CALLID_ANSWERED); |
235 | } while (callid & IPC_CALLID_ANSWERED); |
235 | 236 | ||
236 | return callid; |
237 | return callid; |
237 | } |
238 | } |
238 | 239 |