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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 | /* Lock ordering |
29 | /* Lock ordering |
30 | * |
30 | * |
31 | * First the answerbox, then the phone |
31 | * First the answerbox, then the phone |
32 | */ |
32 | */ |
33 | 33 | ||
34 | #include <synch/spinlock.h> |
34 | #include <synch/spinlock.h> |
35 | #include <synch/waitq.h> |
35 | #include <synch/waitq.h> |
36 | #include <ipc/ipc.h> |
36 | #include <ipc/ipc.h> |
37 | #include <errno.h> |
37 | #include <errno.h> |
38 | #include <mm/slab.h> |
38 | #include <mm/slab.h> |
39 | #include <arch.h> |
39 | #include <arch.h> |
40 | #include <proc/task.h> |
40 | #include <proc/task.h> |
41 | #include <memstr.h> |
41 | #include <memstr.h> |
42 | #include <debug.h> |
42 | #include <debug.h> |
43 | 43 | ||
44 | #include <print.h> |
44 | #include <print.h> |
45 | #include <proc/thread.h> |
45 | #include <proc/thread.h> |
- | 46 | #include <arch/interrupt.h> |
|
46 | 47 | ||
47 | /* Open channel that is assigned automatically to new tasks */ |
48 | /* Open channel that is assigned automatically to new tasks */ |
48 | answerbox_t *ipc_phone_0 = NULL; |
49 | answerbox_t *ipc_phone_0 = NULL; |
49 | 50 | ||
50 | static slab_cache_t *ipc_call_slab; |
51 | static slab_cache_t *ipc_call_slab; |
51 | 52 | ||
- | 53 | typedef struct { |
|
- | 54 | SPINLOCK_DECLARE(lock); |
|
- | 55 | answerbox_t *box; |
|
- | 56 | } ipc_irq_t; |
|
- | 57 | ||
- | 58 | static ipc_irq_t *irq_conns = NULL; |
|
- | 59 | static int irq_conns_size; |
|
- | 60 | ||
52 | /* Initialize new call */ |
61 | /* Initialize new call */ |
53 | static void _ipc_call_init(call_t *call) |
62 | static void _ipc_call_init(call_t *call) |
54 | { |
63 | { |
55 | memsetb((__address)call, sizeof(*call), 0); |
64 | memsetb((__address)call, sizeof(*call), 0); |
56 | call->callerbox = &TASK->answerbox; |
65 | call->callerbox = &TASK->answerbox; |
57 | call->sender = TASK; |
66 | call->sender = TASK; |
58 | } |
67 | } |
59 | 68 | ||
60 | /** Allocate & initialize call structure |
69 | /** Allocate & initialize call structure |
61 | * |
70 | * |
62 | * The call is initialized, so that the reply will be directed |
71 | * The call is initialized, so that the reply will be directed |
63 | * to TASK->answerbox |
72 | * to TASK->answerbox |
- | 73 | * |
|
- | 74 | * @param flags Parameters for slab_alloc (ATOMIC, etc.) |
|
64 | */ |
75 | */ |
65 | call_t * ipc_call_alloc(void) |
76 | call_t * ipc_call_alloc(int flags) |
66 | { |
77 | { |
67 | call_t *call; |
78 | call_t *call; |
68 | 79 | ||
69 | call = slab_alloc(ipc_call_slab, 0); |
80 | call = slab_alloc(ipc_call_slab, flags); |
70 | _ipc_call_init(call); |
81 | _ipc_call_init(call); |
71 | 82 | ||
72 | return call; |
83 | return call; |
73 | } |
84 | } |
74 | 85 | ||
75 | /** Initialize allocated call */ |
86 | /** Initialize allocated call */ |
76 | void ipc_call_static_init(call_t *call) |
87 | void ipc_call_static_init(call_t *call) |
77 | { |
88 | { |
78 | _ipc_call_init(call); |
89 | _ipc_call_init(call); |
79 | call->flags |= IPC_CALL_STATIC_ALLOC; |
90 | call->flags |= IPC_CALL_STATIC_ALLOC; |
80 | } |
91 | } |
81 | 92 | ||
82 | /** Deallocate call stracuture */ |
93 | /** Deallocate call stracuture */ |
83 | void ipc_call_free(call_t *call) |
94 | void ipc_call_free(call_t *call) |
84 | { |
95 | { |
85 | slab_free(ipc_call_slab, call); |
96 | slab_free(ipc_call_slab, call); |
86 | } |
97 | } |
87 | 98 | ||
88 | /** Initialize answerbox structure |
99 | /** Initialize answerbox structure |
89 | */ |
100 | */ |
90 | void ipc_answerbox_init(answerbox_t *box) |
101 | void ipc_answerbox_init(answerbox_t *box) |
91 | { |
102 | { |
92 | spinlock_initialize(&box->lock, "ipc_box_lock"); |
103 | spinlock_initialize(&box->lock, "ipc_box_lock"); |
- | 104 | spinlock_initialize(&box->irq_lock, "ipc_box_irqlock"); |
|
93 | waitq_initialize(&box->wq); |
105 | waitq_initialize(&box->wq); |
94 | list_initialize(&box->connected_phones); |
106 | list_initialize(&box->connected_phones); |
95 | list_initialize(&box->calls); |
107 | list_initialize(&box->calls); |
96 | list_initialize(&box->dispatched_calls); |
108 | list_initialize(&box->dispatched_calls); |
97 | list_initialize(&box->answers); |
109 | list_initialize(&box->answers); |
- | 110 | list_initialize(&box->irq_notifs); |
|
98 | box->task = TASK; |
111 | box->task = TASK; |
99 | } |
112 | } |
100 | 113 | ||
101 | /** Connect phone to answerbox */ |
114 | /** Connect phone to answerbox */ |
102 | void ipc_phone_connect(phone_t *phone, answerbox_t *box) |
115 | void ipc_phone_connect(phone_t *phone, answerbox_t *box) |
103 | { |
116 | { |
104 | spinlock_lock(&phone->lock); |
117 | spinlock_lock(&phone->lock); |
105 | 118 | ||
106 | ASSERT(!phone->callee); |
119 | ASSERT(!phone->callee); |
107 | phone->busy = IPC_BUSY_CONNECTED; |
120 | phone->busy = IPC_BUSY_CONNECTED; |
108 | phone->callee = box; |
121 | phone->callee = box; |
109 | 122 | ||
110 | spinlock_lock(&box->lock); |
123 | spinlock_lock(&box->lock); |
111 | list_append(&phone->list, &box->connected_phones); |
124 | list_append(&phone->list, &box->connected_phones); |
112 | spinlock_unlock(&box->lock); |
125 | spinlock_unlock(&box->lock); |
113 | 126 | ||
114 | spinlock_unlock(&phone->lock); |
127 | spinlock_unlock(&phone->lock); |
115 | } |
128 | } |
116 | 129 | ||
117 | /** Initialize phone structure and connect phone to answerbox |
130 | /** Initialize phone structure and connect phone to answerbox |
118 | */ |
131 | */ |
119 | void ipc_phone_init(phone_t *phone) |
132 | void ipc_phone_init(phone_t *phone) |
120 | { |
133 | { |
121 | spinlock_initialize(&phone->lock, "phone_lock"); |
134 | spinlock_initialize(&phone->lock, "phone_lock"); |
122 | phone->callee = NULL; |
135 | phone->callee = NULL; |
123 | phone->busy = IPC_BUSY_FREE; |
136 | phone->busy = IPC_BUSY_FREE; |
124 | atomic_set(&phone->active_calls, 0); |
137 | atomic_set(&phone->active_calls, 0); |
125 | } |
138 | } |
126 | 139 | ||
127 | /** Helper function to facilitate synchronous calls */ |
140 | /** Helper function to facilitate synchronous calls */ |
128 | void ipc_call_sync(phone_t *phone, call_t *request) |
141 | void ipc_call_sync(phone_t *phone, call_t *request) |
129 | { |
142 | { |
130 | answerbox_t sync_box; |
143 | answerbox_t sync_box; |
131 | 144 | ||
132 | ipc_answerbox_init(&sync_box); |
145 | ipc_answerbox_init(&sync_box); |
133 | 146 | ||
134 | /* We will receive data on special box */ |
147 | /* We will receive data on special box */ |
135 | request->callerbox = &sync_box; |
148 | request->callerbox = &sync_box; |
136 | 149 | ||
137 | ipc_call(phone, request); |
150 | ipc_call(phone, request); |
138 | ipc_wait_for_call(&sync_box, 0); |
151 | ipc_wait_for_call(&sync_box, 0); |
139 | } |
152 | } |
140 | 153 | ||
141 | /** Answer message that was not dispatched and is not entered in |
154 | /** Answer message that was not dispatched and is not entered in |
142 | * any queue |
155 | * any queue |
143 | */ |
156 | */ |
144 | static void _ipc_answer_free_call(call_t *call) |
157 | static void _ipc_answer_free_call(call_t *call) |
145 | { |
158 | { |
146 | answerbox_t *callerbox = call->callerbox; |
159 | answerbox_t *callerbox = call->callerbox; |
147 | 160 | ||
148 | call->flags |= IPC_CALL_ANSWERED; |
161 | call->flags |= IPC_CALL_ANSWERED; |
149 | 162 | ||
150 | spinlock_lock(&callerbox->lock); |
163 | spinlock_lock(&callerbox->lock); |
151 | list_append(&call->list, &callerbox->answers); |
164 | list_append(&call->list, &callerbox->answers); |
152 | spinlock_unlock(&callerbox->lock); |
165 | spinlock_unlock(&callerbox->lock); |
153 | waitq_wakeup(&callerbox->wq, 0); |
166 | waitq_wakeup(&callerbox->wq, 0); |
154 | } |
167 | } |
155 | 168 | ||
156 | /** Answer message, that is in callee queue |
169 | /** Answer message, that is in callee queue |
157 | * |
170 | * |
158 | * @param box Answerbox that is answering the message |
171 | * @param box Answerbox that is answering the message |
159 | * @param call Modified request that is being sent back |
172 | * @param call Modified request that is being sent back |
160 | */ |
173 | */ |
161 | void ipc_answer(answerbox_t *box, call_t *call) |
174 | void ipc_answer(answerbox_t *box, call_t *call) |
162 | { |
175 | { |
163 | /* Remove from active box */ |
176 | /* Remove from active box */ |
164 | spinlock_lock(&box->lock); |
177 | spinlock_lock(&box->lock); |
165 | list_remove(&call->list); |
178 | list_remove(&call->list); |
166 | spinlock_unlock(&box->lock); |
179 | spinlock_unlock(&box->lock); |
167 | /* Send back answer */ |
180 | /* Send back answer */ |
168 | _ipc_answer_free_call(call); |
181 | _ipc_answer_free_call(call); |
169 | } |
182 | } |
170 | 183 | ||
171 | /** Simulate sending back a message |
184 | /** Simulate sending back a message |
172 | * |
185 | * |
173 | * Most errors are better handled by forming a normal backward |
186 | * Most errors are better handled by forming a normal backward |
174 | * message and sending it as a normal answer. |
187 | * message and sending it as a normal answer. |
175 | */ |
188 | */ |
176 | void ipc_backsend_err(phone_t *phone, call_t *call, __native err) |
189 | void ipc_backsend_err(phone_t *phone, call_t *call, __native err) |
177 | { |
190 | { |
178 | call->data.phone = phone; |
191 | call->data.phone = phone; |
179 | atomic_inc(&phone->active_calls); |
192 | atomic_inc(&phone->active_calls); |
180 | if (phone->busy == IPC_BUSY_CONNECTED) |
193 | if (phone->busy == IPC_BUSY_CONNECTED) |
181 | IPC_SET_RETVAL(call->data, EHANGUP); |
194 | IPC_SET_RETVAL(call->data, EHANGUP); |
182 | else |
195 | else |
183 | IPC_SET_RETVAL(call->data, ENOENT); |
196 | IPC_SET_RETVAL(call->data, ENOENT); |
184 | 197 | ||
185 | _ipc_answer_free_call(call); |
198 | _ipc_answer_free_call(call); |
186 | } |
199 | } |
187 | 200 | ||
188 | /* Unsafe unchecking ipc_call */ |
201 | /* Unsafe unchecking ipc_call */ |
189 | static void _ipc_call(phone_t *phone, answerbox_t *box, call_t *call) |
202 | static void _ipc_call(phone_t *phone, answerbox_t *box, call_t *call) |
190 | { |
203 | { |
191 | if (! (call->flags & IPC_CALL_FORWARDED)) { |
204 | if (! (call->flags & IPC_CALL_FORWARDED)) { |
192 | atomic_inc(&phone->active_calls); |
205 | atomic_inc(&phone->active_calls); |
193 | call->data.phone = phone; |
206 | call->data.phone = phone; |
194 | } |
207 | } |
195 | 208 | ||
196 | spinlock_lock(&box->lock); |
209 | spinlock_lock(&box->lock); |
197 | list_append(&call->list, &box->calls); |
210 | list_append(&call->list, &box->calls); |
198 | spinlock_unlock(&box->lock); |
211 | spinlock_unlock(&box->lock); |
199 | waitq_wakeup(&box->wq, 0); |
212 | waitq_wakeup(&box->wq, 0); |
200 | } |
213 | } |
201 | 214 | ||
202 | /** Send a asynchronous request using phone to answerbox |
215 | /** Send a asynchronous request using phone to answerbox |
203 | * |
216 | * |
204 | * @param phone Phone connected to answerbox |
217 | * @param phone Phone connected to answerbox |
205 | * @param request Request to be sent |
218 | * @param request Request to be sent |
206 | */ |
219 | */ |
207 | int ipc_call(phone_t *phone, call_t *call) |
220 | int ipc_call(phone_t *phone, call_t *call) |
208 | { |
221 | { |
209 | answerbox_t *box; |
222 | answerbox_t *box; |
210 | 223 | ||
211 | spinlock_lock(&phone->lock); |
224 | spinlock_lock(&phone->lock); |
212 | 225 | ||
213 | box = phone->callee; |
226 | box = phone->callee; |
214 | if (!box) { |
227 | if (!box) { |
215 | /* Trying to send over disconnected phone */ |
228 | /* Trying to send over disconnected phone */ |
216 | spinlock_unlock(&phone->lock); |
229 | spinlock_unlock(&phone->lock); |
217 | if (call->flags & IPC_CALL_FORWARDED) { |
230 | if (call->flags & IPC_CALL_FORWARDED) { |
218 | IPC_SET_RETVAL(call->data, EFORWARD); |
231 | IPC_SET_RETVAL(call->data, EFORWARD); |
219 | _ipc_answer_free_call(call); |
232 | _ipc_answer_free_call(call); |
220 | } else { /* Simulate sending back a message */ |
233 | } else { /* Simulate sending back a message */ |
221 | if (phone->busy == IPC_BUSY_CONNECTED) |
234 | if (phone->busy == IPC_BUSY_CONNECTED) |
222 | ipc_backsend_err(phone, call, EHANGUP); |
235 | ipc_backsend_err(phone, call, EHANGUP); |
223 | else |
236 | else |
224 | ipc_backsend_err(phone, call, ENOENT); |
237 | ipc_backsend_err(phone, call, ENOENT); |
225 | } |
238 | } |
226 | 239 | ||
227 | return ENOENT; |
240 | return ENOENT; |
228 | } |
241 | } |
229 | _ipc_call(phone, box, call); |
242 | _ipc_call(phone, box, call); |
230 | 243 | ||
231 | spinlock_unlock(&phone->lock); |
244 | spinlock_unlock(&phone->lock); |
232 | return 0; |
245 | return 0; |
233 | } |
246 | } |
234 | 247 | ||
235 | /** Disconnect phone from answerbox |
248 | /** Disconnect phone from answerbox |
236 | * |
249 | * |
237 | * It is allowed to call disconnect on already disconnected phone |
250 | * It is allowed to call disconnect on already disconnected phone |
238 | * |
251 | * |
239 | * @return 0 - phone disconnected, -1 - the phone was already disconnected |
252 | * @return 0 - phone disconnected, -1 - the phone was already disconnected |
240 | */ |
253 | */ |
241 | int ipc_phone_hangup(phone_t *phone) |
254 | int ipc_phone_hangup(phone_t *phone) |
242 | { |
255 | { |
243 | answerbox_t *box; |
256 | answerbox_t *box; |
244 | call_t *call; |
257 | call_t *call; |
245 | 258 | ||
246 | spinlock_lock(&phone->lock); |
259 | spinlock_lock(&phone->lock); |
247 | box = phone->callee; |
260 | box = phone->callee; |
248 | if (!box) { |
261 | if (!box) { |
249 | if (phone->busy == IPC_BUSY_CONNECTING) { |
262 | if (phone->busy == IPC_BUSY_CONNECTING) { |
250 | spinlock_unlock(&phone->lock); |
263 | spinlock_unlock(&phone->lock); |
251 | return -1; |
264 | return -1; |
252 | } |
265 | } |
253 | /* Already disconnected phone */ |
266 | /* Already disconnected phone */ |
254 | phone->busy = IPC_BUSY_FREE; |
267 | phone->busy = IPC_BUSY_FREE; |
255 | spinlock_unlock(&phone->lock); |
268 | spinlock_unlock(&phone->lock); |
256 | return 0; |
269 | return 0; |
257 | } |
270 | } |
258 | 271 | ||
259 | spinlock_lock(&box->lock); |
272 | spinlock_lock(&box->lock); |
260 | list_remove(&phone->list); |
273 | list_remove(&phone->list); |
261 | phone->callee = NULL; |
274 | phone->callee = NULL; |
262 | spinlock_unlock(&box->lock); |
275 | spinlock_unlock(&box->lock); |
263 | 276 | ||
264 | call = ipc_call_alloc(); |
277 | call = ipc_call_alloc(0); |
265 | IPC_SET_METHOD(call->data, IPC_M_PHONE_HUNGUP); |
278 | IPC_SET_METHOD(call->data, IPC_M_PHONE_HUNGUP); |
266 | call->flags |= IPC_CALL_DISCARD_ANSWER; |
279 | call->flags |= IPC_CALL_DISCARD_ANSWER; |
267 | _ipc_call(phone, box, call); |
280 | _ipc_call(phone, box, call); |
268 | 281 | ||
269 | phone->busy = IPC_BUSY_FREE; |
282 | phone->busy = IPC_BUSY_FREE; |
270 | 283 | ||
271 | spinlock_unlock(&phone->lock); |
284 | spinlock_unlock(&phone->lock); |
272 | 285 | ||
273 | return 0; |
286 | return 0; |
274 | } |
287 | } |
275 | 288 | ||
276 | /** Forwards call from one answerbox to a new one |
289 | /** Forwards call from one answerbox to a new one |
277 | * |
290 | * |
278 | * @param request Request to be forwarded |
291 | * @param request Request to be forwarded |
279 | * @param newbox Target answerbox |
292 | * @param newbox Target answerbox |
280 | * @param oldbox Old answerbox |
293 | * @param oldbox Old answerbox |
281 | * @return 0 on forward ok, error code, if there was error |
294 | * @return 0 on forward ok, error code, if there was error |
282 | * |
295 | * |
283 | * - the return value serves only as an information for the forwarder, |
296 | * - the return value serves only as an information for the forwarder, |
284 | * the original caller is notified automatically with EFORWARD |
297 | * the original caller is notified automatically with EFORWARD |
285 | */ |
298 | */ |
286 | int ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox) |
299 | int ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox) |
287 | { |
300 | { |
288 | spinlock_lock(&oldbox->lock); |
301 | spinlock_lock(&oldbox->lock); |
289 | list_remove(&call->list); |
302 | list_remove(&call->list); |
290 | spinlock_unlock(&oldbox->lock); |
303 | spinlock_unlock(&oldbox->lock); |
291 | 304 | ||
292 | return ipc_call(newphone, call); |
305 | return ipc_call(newphone, call); |
293 | } |
306 | } |
294 | 307 | ||
295 | 308 | ||
296 | /** Wait for phone call |
309 | /** Wait for phone call |
297 | * |
310 | * |
298 | * @return Recived message address |
311 | * @return Recived message address |
299 | * - to distinguish between call and answer, look at call->flags |
312 | * - to distinguish between call and answer, look at call->flags |
300 | */ |
313 | */ |
301 | call_t * ipc_wait_for_call(answerbox_t *box, int flags) |
314 | call_t * ipc_wait_for_call(answerbox_t *box, int flags) |
302 | { |
315 | { |
303 | call_t *request; |
316 | call_t *request; |
- | 317 | ipl_t ipl; |
|
304 | 318 | ||
305 | restart: |
319 | restart: |
306 | if (flags & IPC_WAIT_NONBLOCKING) { |
320 | if (flags & IPC_WAIT_NONBLOCKING) { |
307 | if (waitq_sleep_timeout(&box->wq,0,1) == ESYNCH_WOULD_BLOCK) |
321 | if (waitq_sleep_timeout(&box->wq,0,1) == ESYNCH_WOULD_BLOCK) |
308 | return NULL; |
322 | return NULL; |
309 | } else |
323 | } else |
310 | waitq_sleep(&box->wq); |
324 | waitq_sleep(&box->wq); |
311 | 325 | ||
312 | spinlock_lock(&box->lock); |
326 | spinlock_lock(&box->lock); |
- | 327 | if (!list_empty(&box->irq_notifs)) { |
|
- | 328 | ipl = interrupts_disable(); |
|
- | 329 | spinlock_lock(&box->irq_lock); |
|
- | 330 | ||
- | 331 | request = list_get_instance(box->answers.next, call_t, list); |
|
- | 332 | list_remove(&request->list); |
|
- | 333 | ||
- | 334 | spinlock_unlock(&box->irq_lock); |
|
- | 335 | interrupts_restore(ipl); |
|
313 | if (!list_empty(&box->answers)) { |
336 | } else if (!list_empty(&box->answers)) { |
314 | /* Handle asynchronous answers */ |
337 | /* Handle asynchronous answers */ |
315 | request = list_get_instance(box->answers.next, call_t, list); |
338 | request = list_get_instance(box->answers.next, call_t, list); |
316 | list_remove(&request->list); |
339 | list_remove(&request->list); |
317 | atomic_dec(&request->data.phone->active_calls); |
340 | atomic_dec(&request->data.phone->active_calls); |
318 | } else if (!list_empty(&box->calls)) { |
341 | } else if (!list_empty(&box->calls)) { |
319 | /* Handle requests */ |
342 | /* Handle requests */ |
320 | request = list_get_instance(box->calls.next, call_t, list); |
343 | request = list_get_instance(box->calls.next, call_t, list); |
321 | list_remove(&request->list); |
344 | list_remove(&request->list); |
322 | /* Append request to dispatch queue */ |
345 | /* Append request to dispatch queue */ |
323 | list_append(&request->list, &box->dispatched_calls); |
346 | list_append(&request->list, &box->dispatched_calls); |
324 | } else { |
347 | } else { |
325 | /* This can happen regularly after ipc_cleanup, remove |
348 | /* This can happen regularly after ipc_cleanup, remove |
326 | * the warning in the future when the IPC is |
349 | * the warning in the future when the IPC is |
327 | * more debugged */ |
350 | * more debugged */ |
328 | printf("WARNING: Spurious IPC wakeup.\n"); |
351 | printf("WARNING: Spurious IPC wakeup.\n"); |
329 | spinlock_unlock(&box->lock); |
352 | spinlock_unlock(&box->lock); |
330 | goto restart; |
353 | goto restart; |
331 | } |
354 | } |
332 | spinlock_unlock(&box->lock); |
355 | spinlock_unlock(&box->lock); |
333 | return request; |
356 | return request; |
334 | } |
357 | } |
335 | 358 | ||
336 | /** Initilize ipc subsystem */ |
- | |
337 | void ipc_init(void) |
- | |
338 | { |
- | |
339 | ipc_call_slab = slab_cache_create("ipc_call", |
- | |
340 | sizeof(call_t), |
- | |
341 | 0, |
- | |
342 | NULL, NULL, 0); |
- | |
343 | } |
- | |
344 | - | ||
345 | /** Answer all calls from list with EHANGUP msg */ |
359 | /** Answer all calls from list with EHANGUP msg */ |
346 | static void ipc_cleanup_call_list(link_t *lst) |
360 | static void ipc_cleanup_call_list(link_t *lst) |
347 | { |
361 | { |
348 | call_t *call; |
362 | call_t *call; |
349 | 363 | ||
350 | while (!list_empty(lst)) { |
364 | while (!list_empty(lst)) { |
351 | call = list_get_instance(lst->next, call_t, list); |
365 | call = list_get_instance(lst->next, call_t, list); |
352 | list_remove(&call->list); |
366 | list_remove(&call->list); |
353 | 367 | ||
354 | IPC_SET_RETVAL(call->data, EHANGUP); |
368 | IPC_SET_RETVAL(call->data, EHANGUP); |
355 | _ipc_answer_free_call(call); |
369 | _ipc_answer_free_call(call); |
356 | } |
370 | } |
357 | } |
371 | } |
358 | 372 | ||
- | 373 | /** Disconnect all irq's notifications |
|
- | 374 | * |
|
- | 375 | * TODO: It may be better to do some linked list, so that |
|
- | 376 | * we wouldn't need to go through whole array every cleanup |
|
- | 377 | */ |
|
- | 378 | static void ipc_irq_cleanup(answerbox_t *box) |
|
- | 379 | { |
|
- | 380 | int i; |
|
- | 381 | ipl_t ipl; |
|
- | 382 | ||
- | 383 | for (i=0; i < irq_conns_size; i++) { |
|
- | 384 | ipl = interrupts_disable(); |
|
- | 385 | spinlock_lock(&irq_conns[i].lock); |
|
- | 386 | if (irq_conns[i].box == box) |
|
- | 387 | irq_conns[i].box = NULL; |
|
- | 388 | spinlock_unlock(&irq_conns[i].lock); |
|
- | 389 | interrupts_restore(ipl); |
|
- | 390 | } |
|
- | 391 | } |
|
- | 392 | ||
359 | /** Cleans up all IPC communication of the given task |
393 | /** Cleans up all IPC communication of the given task |
360 | * |
394 | * |
361 | * |
395 | * |
362 | */ |
396 | */ |
363 | void ipc_cleanup(task_t *task) |
397 | void ipc_cleanup(task_t *task) |
364 | { |
398 | { |
365 | int i; |
399 | int i; |
366 | call_t *call; |
400 | call_t *call; |
367 | phone_t *phone; |
401 | phone_t *phone; |
368 | 402 | ||
369 | /* Disconnect all our phones ('ipc_phone_hangup') */ |
403 | /* Disconnect all our phones ('ipc_phone_hangup') */ |
370 | for (i=0;i < IPC_MAX_PHONES; i++) |
404 | for (i=0;i < IPC_MAX_PHONES; i++) |
371 | ipc_phone_hangup(&task->phones[i]); |
405 | ipc_phone_hangup(&task->phones[i]); |
372 | 406 | ||
- | 407 | /* Disconnect all connected irqs */ |
|
- | 408 | ipc_irq_cleanup(&task->answerbox); |
|
- | 409 | ||
373 | /* Disconnect all phones connected to our answerbox */ |
410 | /* Disconnect all phones connected to our answerbox */ |
374 | restart_phones: |
411 | restart_phones: |
375 | spinlock_lock(&task->answerbox.lock); |
412 | spinlock_lock(&task->answerbox.lock); |
376 | while (!list_empty(&task->answerbox.connected_phones)) { |
413 | while (!list_empty(&task->answerbox.connected_phones)) { |
377 | phone = list_get_instance(task->answerbox.connected_phones.next, |
414 | phone = list_get_instance(task->answerbox.connected_phones.next, |
378 | phone_t, |
415 | phone_t, |
379 | list); |
416 | list); |
380 | if (! spinlock_trylock(&phone->lock)) { |
417 | if (! spinlock_trylock(&phone->lock)) { |
381 | spinlock_unlock(&task->answerbox.lock); |
418 | spinlock_unlock(&task->answerbox.lock); |
382 | goto restart_phones; |
419 | goto restart_phones; |
383 | } |
420 | } |
384 | 421 | ||
385 | /* Disconnect phone */ |
422 | /* Disconnect phone */ |
386 | phone->callee = NULL; |
423 | phone->callee = NULL; |
387 | list_remove(&phone->list); |
424 | list_remove(&phone->list); |
388 | 425 | ||
389 | spinlock_unlock(&phone->lock); |
426 | spinlock_unlock(&phone->lock); |
390 | } |
427 | } |
391 | 428 | ||
392 | /* Answer all messages in 'calls' and 'dispatched_calls' queues */ |
429 | /* Answer all messages in 'calls' and 'dispatched_calls' queues */ |
393 | spinlock_lock(&task->answerbox.lock); |
430 | spinlock_lock(&task->answerbox.lock); |
394 | ipc_cleanup_call_list(&task->answerbox.dispatched_calls); |
431 | ipc_cleanup_call_list(&task->answerbox.dispatched_calls); |
395 | ipc_cleanup_call_list(&task->answerbox.calls); |
432 | ipc_cleanup_call_list(&task->answerbox.calls); |
396 | spinlock_unlock(&task->answerbox.lock); |
433 | spinlock_unlock(&task->answerbox.lock); |
397 | 434 | ||
398 | /* Wait for all async answers to arrive */ |
435 | /* Wait for all async answers to arrive */ |
399 | while (atomic_get(&task->active_calls)) { |
436 | while (atomic_get(&task->active_calls)) { |
400 | call = ipc_wait_for_call(&task->answerbox, 0); |
437 | call = ipc_wait_for_call(&task->answerbox, 0); |
401 | ASSERT(call->flags & IPC_CALL_ANSWERED); |
438 | ASSERT(call->flags & IPC_CALL_ANSWERED); |
402 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
439 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
403 | 440 | ||
404 | atomic_dec(&task->active_calls); |
441 | atomic_dec(&task->active_calls); |
405 | ipc_call_free(call); |
442 | ipc_call_free(call); |
406 | } |
443 | } |
407 | } |
444 | } |
- | 445 | ||
- | 446 | /** Initialize table of interrupt handlers */ |
|
- | 447 | static void ipc_irq_make_table(int irqcount) |
|
- | 448 | { |
|
- | 449 | int i; |
|
- | 450 | ||
- | 451 | irq_conns_size = irqcount; |
|
- | 452 | irq_conns = malloc(irqcount * (sizeof(*irq_conns)), 0); |
|
- | 453 | for (i=0; i < irqcount; i++) { |
|
- | 454 | spinlock_initialize(&irq_conns[i].lock, "irq_ipc_lock"); |
|
- | 455 | irq_conns[i].box = NULL; |
|
- | 456 | } |
|
- | 457 | } |
|
- | 458 | ||
- | 459 | void ipc_irq_unregister(answerbox_t *box, int irq) |
|
- | 460 | { |
|
- | 461 | ipl_t ipl; |
|
- | 462 | ||
- | 463 | ipl = interrupts_disable(); |
|
- | 464 | spinlock_lock(&irq_conns[irq].lock); |
|
- | 465 | if (irq_conns[irq].box == box) |
|
- | 466 | irq_conns[irq].box = NULL; |
|
- | 467 | ||
- | 468 | spinlock_unlock(&irq_conns[irq].lock); |
|
- | 469 | interrupts_restore(ipl); |
|
- | 470 | } |
|
- | 471 | ||
- | 472 | /** Register an answerbox as a receiving end of interrupts notifications */ |
|
- | 473 | int ipc_irq_register(answerbox_t *box, int irq) |
|
- | 474 | { |
|
- | 475 | ipl_t ipl; |
|
- | 476 | ||
- | 477 | ASSERT(irq_conns); |
|
- | 478 | ||
- | 479 | ipl = interrupts_disable(); |
|
- | 480 | spinlock_lock(&irq_conns[irq].lock); |
|
- | 481 | ||
- | 482 | if (irq_conns[irq].box) { |
|
- | 483 | spinlock_unlock(&irq_conns[irq].lock); |
|
- | 484 | interrupts_restore(ipl); |
|
- | 485 | return EEXISTS; |
|
- | 486 | } |
|
- | 487 | irq_conns[irq].box = box; |
|
- | 488 | spinlock_unlock(&irq_conns[irq].lock); |
|
- | 489 | interrupts_restore(ipl); |
|
- | 490 | ||
- | 491 | return 0; |
|
- | 492 | } |
|
- | 493 | ||
- | 494 | /** Notify process that an irq had happend |
|
- | 495 | * |
|
- | 496 | * We expect interrupts to be disabled |
|
- | 497 | */ |
|
- | 498 | void ipc_irq_send_notif(int irq) |
|
- | 499 | { |
|
- | 500 | call_t *call; |
|
- | 501 | ||
- | 502 | ASSERT(irq_conns); |
|
- | 503 | spinlock_lock(&irq_conns[irq].lock); |
|
- | 504 | ||
- | 505 | if (irq_conns[irq].box) { |
|
- | 506 | call = ipc_call_alloc(FRAME_ATOMIC); |
|
- | 507 | call->flags |= IPC_CALL_NOTIF; |
|
- | 508 | IPC_SET_METHOD(call->data, IPC_M_INTERRUPT); |
|
- | 509 | IPC_SET_ARG1(call->data, irq); |
|
- | 510 | ||
- | 511 | spinlock_lock(&irq_conns[irq].box->irq_lock); |
|
- | 512 | list_append(&call->list, &irq_conns[irq].box->irq_notifs); |
|
- | 513 | spinlock_unlock(&irq_conns[irq].box->irq_lock); |
|
- | 514 | ||
- | 515 | waitq_wakeup(&irq_conns[irq].box->wq, 0); |
|
- | 516 | } |
|
- | 517 | ||
- | 518 | spinlock_unlock(&irq_conns[irq].lock); |
|
- | 519 | } |
|
- | 520 | ||
- | 521 | /** Initilize ipc subsystem */ |
|
- | 522 | void ipc_init(void) |
|
- | 523 | { |
|
- | 524 | ipc_call_slab = slab_cache_create("ipc_call", |
|
- | 525 | sizeof(call_t), |
|
- | 526 | 0, |
|
- | 527 | NULL, NULL, 0); |
|
- | 528 | ipc_irq_make_table(IRQ_COUNT); |
|
- | 529 | } |
|
- | 530 | ||
408 | 531 |