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1da177e4 LT |
1 | /* |
2 | * drivers/s390/cio/device_fsm.c | |
3 | * finite state machine for device handling | |
4 | * | |
5 | * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, | |
6 | * IBM Corporation | |
7 | * Author(s): Cornelia Huck(cohuck@de.ibm.com) | |
8 | * Martin Schwidefsky (schwidefsky@de.ibm.com) | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/config.h> | |
13 | #include <linux/init.h> | |
14 | ||
15 | #include <asm/ccwdev.h> | |
4c24da79 | 16 | #include <asm/cio.h> |
1da177e4 LT |
17 | |
18 | #include "cio.h" | |
19 | #include "cio_debug.h" | |
20 | #include "css.h" | |
21 | #include "device.h" | |
22 | #include "chsc.h" | |
23 | #include "ioasm.h" | |
1da177e4 LT |
24 | |
25 | int | |
26 | device_is_online(struct subchannel *sch) | |
27 | { | |
28 | struct ccw_device *cdev; | |
29 | ||
30 | if (!sch->dev.driver_data) | |
31 | return 0; | |
32 | cdev = sch->dev.driver_data; | |
33 | return (cdev->private->state == DEV_STATE_ONLINE); | |
34 | } | |
35 | ||
36 | int | |
37 | device_is_disconnected(struct subchannel *sch) | |
38 | { | |
39 | struct ccw_device *cdev; | |
40 | ||
41 | if (!sch->dev.driver_data) | |
42 | return 0; | |
43 | cdev = sch->dev.driver_data; | |
44 | return (cdev->private->state == DEV_STATE_DISCONNECTED || | |
45 | cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID); | |
46 | } | |
47 | ||
48 | void | |
49 | device_set_disconnected(struct subchannel *sch) | |
50 | { | |
51 | struct ccw_device *cdev; | |
52 | ||
53 | if (!sch->dev.driver_data) | |
54 | return; | |
55 | cdev = sch->dev.driver_data; | |
56 | ccw_device_set_timeout(cdev, 0); | |
57 | cdev->private->flags.fake_irb = 0; | |
58 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
59 | } | |
60 | ||
61 | void | |
62 | device_set_waiting(struct subchannel *sch) | |
63 | { | |
64 | struct ccw_device *cdev; | |
65 | ||
66 | if (!sch->dev.driver_data) | |
67 | return; | |
68 | cdev = sch->dev.driver_data; | |
69 | ccw_device_set_timeout(cdev, 10*HZ); | |
70 | cdev->private->state = DEV_STATE_WAIT4IO; | |
71 | } | |
72 | ||
73 | /* | |
74 | * Timeout function. It just triggers a DEV_EVENT_TIMEOUT. | |
75 | */ | |
76 | static void | |
77 | ccw_device_timeout(unsigned long data) | |
78 | { | |
79 | struct ccw_device *cdev; | |
80 | ||
81 | cdev = (struct ccw_device *) data; | |
82 | spin_lock_irq(cdev->ccwlock); | |
83 | dev_fsm_event(cdev, DEV_EVENT_TIMEOUT); | |
84 | spin_unlock_irq(cdev->ccwlock); | |
85 | } | |
86 | ||
87 | /* | |
88 | * Set timeout | |
89 | */ | |
90 | void | |
91 | ccw_device_set_timeout(struct ccw_device *cdev, int expires) | |
92 | { | |
93 | if (expires == 0) { | |
94 | del_timer(&cdev->private->timer); | |
95 | return; | |
96 | } | |
97 | if (timer_pending(&cdev->private->timer)) { | |
98 | if (mod_timer(&cdev->private->timer, jiffies + expires)) | |
99 | return; | |
100 | } | |
101 | cdev->private->timer.function = ccw_device_timeout; | |
102 | cdev->private->timer.data = (unsigned long) cdev; | |
103 | cdev->private->timer.expires = jiffies + expires; | |
104 | add_timer(&cdev->private->timer); | |
105 | } | |
106 | ||
107 | /* Kill any pending timers after machine check. */ | |
108 | void | |
109 | device_kill_pending_timer(struct subchannel *sch) | |
110 | { | |
111 | struct ccw_device *cdev; | |
112 | ||
113 | if (!sch->dev.driver_data) | |
114 | return; | |
115 | cdev = sch->dev.driver_data; | |
116 | ccw_device_set_timeout(cdev, 0); | |
117 | } | |
118 | ||
119 | /* | |
120 | * Cancel running i/o. This is called repeatedly since halt/clear are | |
121 | * asynchronous operations. We do one try with cio_cancel, two tries | |
122 | * with cio_halt, 255 tries with cio_clear. If everythings fails panic. | |
123 | * Returns 0 if device now idle, -ENODEV for device not operational and | |
124 | * -EBUSY if an interrupt is expected (either from halt/clear or from a | |
125 | * status pending). | |
126 | */ | |
127 | int | |
128 | ccw_device_cancel_halt_clear(struct ccw_device *cdev) | |
129 | { | |
130 | struct subchannel *sch; | |
131 | int ret; | |
132 | ||
133 | sch = to_subchannel(cdev->dev.parent); | |
134 | ret = stsch(sch->irq, &sch->schib); | |
135 | if (ret || !sch->schib.pmcw.dnv) | |
136 | return -ENODEV; | |
137 | if (!sch->schib.pmcw.ena || sch->schib.scsw.actl == 0) | |
138 | /* Not operational or no activity -> done. */ | |
139 | return 0; | |
140 | /* Stage 1: cancel io. */ | |
141 | if (!(sch->schib.scsw.actl & SCSW_ACTL_HALT_PEND) && | |
142 | !(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) { | |
143 | ret = cio_cancel(sch); | |
144 | if (ret != -EINVAL) | |
145 | return ret; | |
146 | /* cancel io unsuccessful. From now on it is asynchronous. */ | |
147 | cdev->private->iretry = 3; /* 3 halt retries. */ | |
148 | } | |
149 | if (!(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) { | |
150 | /* Stage 2: halt io. */ | |
151 | if (cdev->private->iretry) { | |
152 | cdev->private->iretry--; | |
153 | ret = cio_halt(sch); | |
154 | return (ret == 0) ? -EBUSY : ret; | |
155 | } | |
156 | /* halt io unsuccessful. */ | |
157 | cdev->private->iretry = 255; /* 255 clear retries. */ | |
158 | } | |
159 | /* Stage 3: clear io. */ | |
160 | if (cdev->private->iretry) { | |
161 | cdev->private->iretry--; | |
162 | ret = cio_clear (sch); | |
163 | return (ret == 0) ? -EBUSY : ret; | |
164 | } | |
165 | panic("Can't stop i/o on subchannel.\n"); | |
166 | } | |
167 | ||
168 | static int | |
169 | ccw_device_handle_oper(struct ccw_device *cdev) | |
170 | { | |
171 | struct subchannel *sch; | |
172 | ||
173 | sch = to_subchannel(cdev->dev.parent); | |
174 | cdev->private->flags.recog_done = 1; | |
175 | /* | |
176 | * Check if cu type and device type still match. If | |
177 | * not, it is certainly another device and we have to | |
178 | * de- and re-register. Also check here for non-matching devno. | |
179 | */ | |
180 | if (cdev->id.cu_type != cdev->private->senseid.cu_type || | |
181 | cdev->id.cu_model != cdev->private->senseid.cu_model || | |
182 | cdev->id.dev_type != cdev->private->senseid.dev_type || | |
183 | cdev->id.dev_model != cdev->private->senseid.dev_model || | |
184 | cdev->private->devno != sch->schib.pmcw.dev) { | |
185 | PREPARE_WORK(&cdev->private->kick_work, | |
186 | ccw_device_do_unreg_rereg, (void *)cdev); | |
187 | queue_work(ccw_device_work, &cdev->private->kick_work); | |
188 | return 0; | |
189 | } | |
190 | cdev->private->flags.donotify = 1; | |
191 | return 1; | |
192 | } | |
193 | ||
194 | /* | |
195 | * The machine won't give us any notification by machine check if a chpid has | |
196 | * been varied online on the SE so we have to find out by magic (i. e. driving | |
197 | * the channel subsystem to device selection and updating our path masks). | |
198 | */ | |
199 | static inline void | |
200 | __recover_lost_chpids(struct subchannel *sch, int old_lpm) | |
201 | { | |
202 | int mask, i; | |
203 | ||
204 | for (i = 0; i<8; i++) { | |
205 | mask = 0x80 >> i; | |
206 | if (!(sch->lpm & mask)) | |
207 | continue; | |
208 | if (old_lpm & mask) | |
209 | continue; | |
210 | chpid_is_actually_online(sch->schib.pmcw.chpid[i]); | |
211 | } | |
212 | } | |
213 | ||
214 | /* | |
215 | * Stop device recognition. | |
216 | */ | |
217 | static void | |
218 | ccw_device_recog_done(struct ccw_device *cdev, int state) | |
219 | { | |
220 | struct subchannel *sch; | |
221 | int notify, old_lpm, same_dev; | |
222 | ||
223 | sch = to_subchannel(cdev->dev.parent); | |
224 | ||
225 | ccw_device_set_timeout(cdev, 0); | |
226 | cio_disable_subchannel(sch); | |
227 | /* | |
228 | * Now that we tried recognition, we have performed device selection | |
229 | * through ssch() and the path information is up to date. | |
230 | */ | |
231 | old_lpm = sch->lpm; | |
232 | stsch(sch->irq, &sch->schib); | |
233 | sch->lpm = sch->schib.pmcw.pim & | |
234 | sch->schib.pmcw.pam & | |
235 | sch->schib.pmcw.pom & | |
236 | sch->opm; | |
4ffa9234 CH |
237 | /* Check since device may again have become not operational. */ |
238 | if (!sch->schib.pmcw.dnv) | |
239 | state = DEV_STATE_NOT_OPER; | |
1da177e4 LT |
240 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) |
241 | /* Force reprobe on all chpids. */ | |
242 | old_lpm = 0; | |
243 | if (sch->lpm != old_lpm) | |
244 | __recover_lost_chpids(sch, old_lpm); | |
245 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) { | |
246 | if (state == DEV_STATE_NOT_OPER) { | |
247 | cdev->private->flags.recog_done = 1; | |
248 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
249 | return; | |
250 | } | |
251 | /* Boxed devices don't need extra treatment. */ | |
252 | } | |
253 | notify = 0; | |
254 | same_dev = 0; /* Keep the compiler quiet... */ | |
255 | switch (state) { | |
256 | case DEV_STATE_NOT_OPER: | |
257 | CIO_DEBUG(KERN_WARNING, 2, | |
258 | "SenseID : unknown device %04x on subchannel %04x\n", | |
259 | cdev->private->devno, sch->irq); | |
260 | break; | |
261 | case DEV_STATE_OFFLINE: | |
262 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) { | |
263 | same_dev = ccw_device_handle_oper(cdev); | |
264 | notify = 1; | |
265 | } | |
266 | /* fill out sense information */ | |
267 | cdev->id = (struct ccw_device_id) { | |
268 | .cu_type = cdev->private->senseid.cu_type, | |
269 | .cu_model = cdev->private->senseid.cu_model, | |
270 | .dev_type = cdev->private->senseid.dev_type, | |
271 | .dev_model = cdev->private->senseid.dev_model, | |
272 | }; | |
273 | if (notify) { | |
274 | cdev->private->state = DEV_STATE_OFFLINE; | |
275 | if (same_dev) { | |
276 | /* Get device online again. */ | |
277 | ccw_device_online(cdev); | |
278 | wake_up(&cdev->private->wait_q); | |
279 | } | |
280 | return; | |
281 | } | |
282 | /* Issue device info message. */ | |
283 | CIO_DEBUG(KERN_INFO, 2, "SenseID : device %04x reports: " | |
284 | "CU Type/Mod = %04X/%02X, Dev Type/Mod = " | |
285 | "%04X/%02X\n", cdev->private->devno, | |
286 | cdev->id.cu_type, cdev->id.cu_model, | |
287 | cdev->id.dev_type, cdev->id.dev_model); | |
288 | break; | |
289 | case DEV_STATE_BOXED: | |
290 | CIO_DEBUG(KERN_WARNING, 2, | |
291 | "SenseID : boxed device %04x on subchannel %04x\n", | |
292 | cdev->private->devno, sch->irq); | |
293 | break; | |
294 | } | |
295 | cdev->private->state = state; | |
296 | io_subchannel_recog_done(cdev); | |
297 | if (state != DEV_STATE_NOT_OPER) | |
298 | wake_up(&cdev->private->wait_q); | |
299 | } | |
300 | ||
301 | /* | |
302 | * Function called from device_id.c after sense id has completed. | |
303 | */ | |
304 | void | |
305 | ccw_device_sense_id_done(struct ccw_device *cdev, int err) | |
306 | { | |
307 | switch (err) { | |
308 | case 0: | |
309 | ccw_device_recog_done(cdev, DEV_STATE_OFFLINE); | |
310 | break; | |
311 | case -ETIME: /* Sense id stopped by timeout. */ | |
312 | ccw_device_recog_done(cdev, DEV_STATE_BOXED); | |
313 | break; | |
314 | default: | |
315 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
316 | break; | |
317 | } | |
318 | } | |
319 | ||
320 | static void | |
321 | ccw_device_oper_notify(void *data) | |
322 | { | |
323 | struct ccw_device *cdev; | |
324 | struct subchannel *sch; | |
325 | int ret; | |
326 | ||
327 | cdev = (struct ccw_device *)data; | |
328 | sch = to_subchannel(cdev->dev.parent); | |
329 | ret = (sch->driver && sch->driver->notify) ? | |
330 | sch->driver->notify(&sch->dev, CIO_OPER) : 0; | |
331 | if (!ret) | |
332 | /* Driver doesn't want device back. */ | |
333 | ccw_device_do_unreg_rereg((void *)cdev); | |
334 | else | |
335 | wake_up(&cdev->private->wait_q); | |
336 | } | |
337 | ||
338 | /* | |
339 | * Finished with online/offline processing. | |
340 | */ | |
341 | static void | |
342 | ccw_device_done(struct ccw_device *cdev, int state) | |
343 | { | |
344 | struct subchannel *sch; | |
345 | ||
346 | sch = to_subchannel(cdev->dev.parent); | |
347 | ||
348 | if (state != DEV_STATE_ONLINE) | |
349 | cio_disable_subchannel(sch); | |
350 | ||
351 | /* Reset device status. */ | |
352 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
353 | ||
354 | cdev->private->state = state; | |
355 | ||
356 | ||
357 | if (state == DEV_STATE_BOXED) | |
358 | CIO_DEBUG(KERN_WARNING, 2, | |
359 | "Boxed device %04x on subchannel %04x\n", | |
360 | cdev->private->devno, sch->irq); | |
361 | ||
362 | if (cdev->private->flags.donotify) { | |
363 | cdev->private->flags.donotify = 0; | |
364 | PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify, | |
365 | (void *)cdev); | |
366 | queue_work(ccw_device_notify_work, &cdev->private->kick_work); | |
367 | } | |
368 | wake_up(&cdev->private->wait_q); | |
369 | ||
370 | if (css_init_done && state != DEV_STATE_ONLINE) | |
371 | put_device (&cdev->dev); | |
372 | } | |
373 | ||
374 | /* | |
375 | * Function called from device_pgid.c after sense path ground has completed. | |
376 | */ | |
377 | void | |
378 | ccw_device_sense_pgid_done(struct ccw_device *cdev, int err) | |
379 | { | |
380 | struct subchannel *sch; | |
381 | ||
382 | sch = to_subchannel(cdev->dev.parent); | |
383 | switch (err) { | |
384 | case 0: | |
385 | /* Start Path Group verification. */ | |
386 | sch->vpm = 0; /* Start with no path groups set. */ | |
387 | cdev->private->state = DEV_STATE_VERIFY; | |
388 | ccw_device_verify_start(cdev); | |
389 | break; | |
390 | case -ETIME: /* Sense path group id stopped by timeout. */ | |
391 | case -EUSERS: /* device is reserved for someone else. */ | |
392 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
393 | break; | |
394 | case -EOPNOTSUPP: /* path grouping not supported, just set online. */ | |
395 | cdev->private->options.pgroup = 0; | |
396 | ccw_device_done(cdev, DEV_STATE_ONLINE); | |
397 | break; | |
398 | default: | |
399 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
400 | break; | |
401 | } | |
402 | } | |
403 | ||
404 | /* | |
405 | * Start device recognition. | |
406 | */ | |
407 | int | |
408 | ccw_device_recognition(struct ccw_device *cdev) | |
409 | { | |
410 | struct subchannel *sch; | |
411 | int ret; | |
412 | ||
413 | if ((cdev->private->state != DEV_STATE_NOT_OPER) && | |
414 | (cdev->private->state != DEV_STATE_BOXED)) | |
415 | return -EINVAL; | |
416 | sch = to_subchannel(cdev->dev.parent); | |
417 | ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc); | |
418 | if (ret != 0) | |
419 | /* Couldn't enable the subchannel for i/o. Sick device. */ | |
420 | return ret; | |
421 | ||
422 | /* After 60s the device recognition is considered to have failed. */ | |
423 | ccw_device_set_timeout(cdev, 60*HZ); | |
424 | ||
425 | /* | |
426 | * We used to start here with a sense pgid to find out whether a device | |
427 | * is locked by someone else. Unfortunately, the sense pgid command | |
428 | * code has other meanings on devices predating the path grouping | |
429 | * algorithm, so we start with sense id and box the device after an | |
430 | * timeout (or if sense pgid during path verification detects the device | |
431 | * is locked, as may happen on newer devices). | |
432 | */ | |
433 | cdev->private->flags.recog_done = 0; | |
434 | cdev->private->state = DEV_STATE_SENSE_ID; | |
435 | ccw_device_sense_id_start(cdev); | |
436 | return 0; | |
437 | } | |
438 | ||
439 | /* | |
440 | * Handle timeout in device recognition. | |
441 | */ | |
442 | static void | |
443 | ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
444 | { | |
445 | int ret; | |
446 | ||
447 | ret = ccw_device_cancel_halt_clear(cdev); | |
448 | switch (ret) { | |
449 | case 0: | |
450 | ccw_device_recog_done(cdev, DEV_STATE_BOXED); | |
451 | break; | |
452 | case -ENODEV: | |
453 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
454 | break; | |
455 | default: | |
456 | ccw_device_set_timeout(cdev, 3*HZ); | |
457 | } | |
458 | } | |
459 | ||
460 | ||
461 | static void | |
462 | ccw_device_nopath_notify(void *data) | |
463 | { | |
464 | struct ccw_device *cdev; | |
465 | struct subchannel *sch; | |
466 | int ret; | |
467 | ||
468 | cdev = (struct ccw_device *)data; | |
469 | sch = to_subchannel(cdev->dev.parent); | |
470 | /* Extra sanity. */ | |
471 | if (sch->lpm) | |
472 | return; | |
473 | ret = (sch->driver && sch->driver->notify) ? | |
474 | sch->driver->notify(&sch->dev, CIO_NO_PATH) : 0; | |
475 | if (!ret) { | |
476 | if (get_device(&sch->dev)) { | |
477 | /* Driver doesn't want to keep device. */ | |
478 | cio_disable_subchannel(sch); | |
479 | if (get_device(&cdev->dev)) { | |
480 | PREPARE_WORK(&cdev->private->kick_work, | |
481 | ccw_device_call_sch_unregister, | |
482 | (void *)cdev); | |
483 | queue_work(ccw_device_work, | |
484 | &cdev->private->kick_work); | |
485 | } else | |
486 | put_device(&sch->dev); | |
487 | } | |
488 | } else { | |
489 | cio_disable_subchannel(sch); | |
490 | ccw_device_set_timeout(cdev, 0); | |
491 | cdev->private->flags.fake_irb = 0; | |
492 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
493 | wake_up(&cdev->private->wait_q); | |
494 | } | |
495 | } | |
496 | ||
497 | void | |
498 | ccw_device_verify_done(struct ccw_device *cdev, int err) | |
499 | { | |
500 | cdev->private->flags.doverify = 0; | |
501 | switch (err) { | |
502 | case -EOPNOTSUPP: /* path grouping not supported, just set online. */ | |
503 | cdev->private->options.pgroup = 0; | |
504 | case 0: | |
505 | ccw_device_done(cdev, DEV_STATE_ONLINE); | |
506 | /* Deliver fake irb to device driver, if needed. */ | |
507 | if (cdev->private->flags.fake_irb) { | |
508 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
509 | cdev->private->irb.scsw = (struct scsw) { | |
510 | .cc = 1, | |
511 | .fctl = SCSW_FCTL_START_FUNC, | |
512 | .actl = SCSW_ACTL_START_PEND, | |
513 | .stctl = SCSW_STCTL_STATUS_PEND, | |
514 | }; | |
515 | cdev->private->flags.fake_irb = 0; | |
516 | if (cdev->handler) | |
517 | cdev->handler(cdev, cdev->private->intparm, | |
518 | &cdev->private->irb); | |
519 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
520 | } | |
521 | break; | |
522 | case -ETIME: | |
523 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
524 | break; | |
525 | default: | |
526 | PREPARE_WORK(&cdev->private->kick_work, | |
527 | ccw_device_nopath_notify, (void *)cdev); | |
528 | queue_work(ccw_device_notify_work, &cdev->private->kick_work); | |
529 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
530 | break; | |
531 | } | |
532 | } | |
533 | ||
534 | /* | |
535 | * Get device online. | |
536 | */ | |
537 | int | |
538 | ccw_device_online(struct ccw_device *cdev) | |
539 | { | |
540 | struct subchannel *sch; | |
541 | int ret; | |
542 | ||
543 | if ((cdev->private->state != DEV_STATE_OFFLINE) && | |
544 | (cdev->private->state != DEV_STATE_BOXED)) | |
545 | return -EINVAL; | |
546 | sch = to_subchannel(cdev->dev.parent); | |
547 | if (css_init_done && !get_device(&cdev->dev)) | |
548 | return -ENODEV; | |
549 | ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc); | |
550 | if (ret != 0) { | |
551 | /* Couldn't enable the subchannel for i/o. Sick device. */ | |
552 | if (ret == -ENODEV) | |
553 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
554 | return ret; | |
555 | } | |
556 | /* Do we want to do path grouping? */ | |
557 | if (!cdev->private->options.pgroup) { | |
558 | /* No, set state online immediately. */ | |
559 | ccw_device_done(cdev, DEV_STATE_ONLINE); | |
560 | return 0; | |
561 | } | |
562 | /* Do a SensePGID first. */ | |
563 | cdev->private->state = DEV_STATE_SENSE_PGID; | |
564 | ccw_device_sense_pgid_start(cdev); | |
565 | return 0; | |
566 | } | |
567 | ||
568 | void | |
569 | ccw_device_disband_done(struct ccw_device *cdev, int err) | |
570 | { | |
571 | switch (err) { | |
572 | case 0: | |
573 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
574 | break; | |
575 | case -ETIME: | |
576 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
577 | break; | |
578 | default: | |
579 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
580 | break; | |
581 | } | |
582 | } | |
583 | ||
584 | /* | |
585 | * Shutdown device. | |
586 | */ | |
587 | int | |
588 | ccw_device_offline(struct ccw_device *cdev) | |
589 | { | |
590 | struct subchannel *sch; | |
591 | ||
592 | sch = to_subchannel(cdev->dev.parent); | |
593 | if (stsch(sch->irq, &sch->schib) || !sch->schib.pmcw.dnv) | |
594 | return -ENODEV; | |
595 | if (cdev->private->state != DEV_STATE_ONLINE) { | |
596 | if (sch->schib.scsw.actl != 0) | |
597 | return -EBUSY; | |
598 | return -EINVAL; | |
599 | } | |
600 | if (sch->schib.scsw.actl != 0) | |
601 | return -EBUSY; | |
602 | /* Are we doing path grouping? */ | |
603 | if (!cdev->private->options.pgroup) { | |
604 | /* No, set state offline immediately. */ | |
605 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
606 | return 0; | |
607 | } | |
608 | /* Start Set Path Group commands. */ | |
609 | cdev->private->state = DEV_STATE_DISBAND_PGID; | |
610 | ccw_device_disband_start(cdev); | |
611 | return 0; | |
612 | } | |
613 | ||
614 | /* | |
615 | * Handle timeout in device online/offline process. | |
616 | */ | |
617 | static void | |
618 | ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
619 | { | |
620 | int ret; | |
621 | ||
622 | ret = ccw_device_cancel_halt_clear(cdev); | |
623 | switch (ret) { | |
624 | case 0: | |
625 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
626 | break; | |
627 | case -ENODEV: | |
628 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
629 | break; | |
630 | default: | |
631 | ccw_device_set_timeout(cdev, 3*HZ); | |
632 | } | |
633 | } | |
634 | ||
635 | /* | |
636 | * Handle not oper event in device recognition. | |
637 | */ | |
638 | static void | |
639 | ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event) | |
640 | { | |
641 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
642 | } | |
643 | ||
644 | /* | |
645 | * Handle not operational event while offline. | |
646 | */ | |
647 | static void | |
648 | ccw_device_offline_notoper(struct ccw_device *cdev, enum dev_event dev_event) | |
649 | { | |
650 | struct subchannel *sch; | |
651 | ||
652 | cdev->private->state = DEV_STATE_NOT_OPER; | |
653 | sch = to_subchannel(cdev->dev.parent); | |
654 | if (get_device(&cdev->dev)) { | |
655 | PREPARE_WORK(&cdev->private->kick_work, | |
656 | ccw_device_call_sch_unregister, (void *)cdev); | |
657 | queue_work(ccw_device_work, &cdev->private->kick_work); | |
658 | } | |
659 | wake_up(&cdev->private->wait_q); | |
660 | } | |
661 | ||
662 | /* | |
663 | * Handle not operational event while online. | |
664 | */ | |
665 | static void | |
666 | ccw_device_online_notoper(struct ccw_device *cdev, enum dev_event dev_event) | |
667 | { | |
668 | struct subchannel *sch; | |
669 | ||
670 | sch = to_subchannel(cdev->dev.parent); | |
671 | if (sch->driver->notify && | |
672 | sch->driver->notify(&sch->dev, sch->lpm ? CIO_GONE : CIO_NO_PATH)) { | |
673 | ccw_device_set_timeout(cdev, 0); | |
674 | cdev->private->flags.fake_irb = 0; | |
675 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
676 | wake_up(&cdev->private->wait_q); | |
677 | return; | |
678 | } | |
679 | cdev->private->state = DEV_STATE_NOT_OPER; | |
680 | cio_disable_subchannel(sch); | |
681 | if (sch->schib.scsw.actl != 0) { | |
682 | // FIXME: not-oper indication to device driver ? | |
683 | ccw_device_call_handler(cdev); | |
684 | } | |
685 | if (get_device(&cdev->dev)) { | |
686 | PREPARE_WORK(&cdev->private->kick_work, | |
687 | ccw_device_call_sch_unregister, (void *)cdev); | |
688 | queue_work(ccw_device_work, &cdev->private->kick_work); | |
689 | } | |
690 | wake_up(&cdev->private->wait_q); | |
691 | } | |
692 | ||
693 | /* | |
694 | * Handle path verification event. | |
695 | */ | |
696 | static void | |
697 | ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event) | |
698 | { | |
699 | struct subchannel *sch; | |
700 | ||
701 | if (!cdev->private->options.pgroup) | |
702 | return; | |
703 | if (cdev->private->state == DEV_STATE_W4SENSE) { | |
704 | cdev->private->flags.doverify = 1; | |
705 | return; | |
706 | } | |
707 | sch = to_subchannel(cdev->dev.parent); | |
708 | /* | |
709 | * Since we might not just be coming from an interrupt from the | |
710 | * subchannel we have to update the schib. | |
711 | */ | |
712 | stsch(sch->irq, &sch->schib); | |
713 | ||
714 | if (sch->schib.scsw.actl != 0 || | |
715 | (cdev->private->irb.scsw.stctl & SCSW_STCTL_STATUS_PEND)) { | |
716 | /* | |
717 | * No final status yet or final status not yet delivered | |
718 | * to the device driver. Can't do path verfication now, | |
719 | * delay until final status was delivered. | |
720 | */ | |
721 | cdev->private->flags.doverify = 1; | |
722 | return; | |
723 | } | |
724 | /* Device is idle, we can do the path verification. */ | |
725 | cdev->private->state = DEV_STATE_VERIFY; | |
726 | ccw_device_verify_start(cdev); | |
727 | } | |
728 | ||
729 | /* | |
730 | * Got an interrupt for a normal io (state online). | |
731 | */ | |
732 | static void | |
733 | ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
734 | { | |
735 | struct irb *irb; | |
736 | ||
737 | irb = (struct irb *) __LC_IRB; | |
738 | /* Check for unsolicited interrupt. */ | |
739 | if ((irb->scsw.stctl == | |
740 | (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) | |
741 | && (!irb->scsw.cc)) { | |
742 | if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) && | |
743 | !irb->esw.esw0.erw.cons) { | |
744 | /* Unit check but no sense data. Need basic sense. */ | |
745 | if (ccw_device_do_sense(cdev, irb) != 0) | |
746 | goto call_handler_unsol; | |
747 | memcpy(irb, &cdev->private->irb, sizeof(struct irb)); | |
748 | cdev->private->state = DEV_STATE_W4SENSE; | |
749 | cdev->private->intparm = 0; | |
750 | return; | |
751 | } | |
752 | call_handler_unsol: | |
753 | if (cdev->handler) | |
754 | cdev->handler (cdev, 0, irb); | |
755 | return; | |
756 | } | |
757 | /* Accumulate status and find out if a basic sense is needed. */ | |
758 | ccw_device_accumulate_irb(cdev, irb); | |
759 | if (cdev->private->flags.dosense) { | |
760 | if (ccw_device_do_sense(cdev, irb) == 0) { | |
761 | cdev->private->state = DEV_STATE_W4SENSE; | |
762 | } | |
763 | return; | |
764 | } | |
765 | /* Call the handler. */ | |
766 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) | |
767 | /* Start delayed path verification. */ | |
768 | ccw_device_online_verify(cdev, 0); | |
769 | } | |
770 | ||
771 | /* | |
772 | * Got an timeout in online state. | |
773 | */ | |
774 | static void | |
775 | ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
776 | { | |
777 | int ret; | |
778 | ||
779 | ccw_device_set_timeout(cdev, 0); | |
780 | ret = ccw_device_cancel_halt_clear(cdev); | |
781 | if (ret == -EBUSY) { | |
782 | ccw_device_set_timeout(cdev, 3*HZ); | |
783 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; | |
784 | return; | |
785 | } | |
786 | if (ret == -ENODEV) { | |
787 | struct subchannel *sch; | |
788 | ||
789 | sch = to_subchannel(cdev->dev.parent); | |
790 | if (!sch->lpm) { | |
791 | PREPARE_WORK(&cdev->private->kick_work, | |
792 | ccw_device_nopath_notify, (void *)cdev); | |
793 | queue_work(ccw_device_notify_work, | |
794 | &cdev->private->kick_work); | |
795 | } else | |
796 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
797 | } else if (cdev->handler) | |
798 | cdev->handler(cdev, cdev->private->intparm, | |
799 | ERR_PTR(-ETIMEDOUT)); | |
800 | } | |
801 | ||
802 | /* | |
803 | * Got an interrupt for a basic sense. | |
804 | */ | |
805 | void | |
806 | ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event) | |
807 | { | |
808 | struct irb *irb; | |
809 | ||
810 | irb = (struct irb *) __LC_IRB; | |
811 | /* Check for unsolicited interrupt. */ | |
812 | if (irb->scsw.stctl == | |
813 | (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) { | |
814 | if (irb->scsw.cc == 1) | |
815 | /* Basic sense hasn't started. Try again. */ | |
816 | ccw_device_do_sense(cdev, irb); | |
817 | else { | |
818 | printk("Huh? %s(%s): unsolicited interrupt...\n", | |
819 | __FUNCTION__, cdev->dev.bus_id); | |
820 | if (cdev->handler) | |
821 | cdev->handler (cdev, 0, irb); | |
822 | } | |
823 | return; | |
824 | } | |
825 | /* Add basic sense info to irb. */ | |
826 | ccw_device_accumulate_basic_sense(cdev, irb); | |
827 | if (cdev->private->flags.dosense) { | |
828 | /* Another basic sense is needed. */ | |
829 | ccw_device_do_sense(cdev, irb); | |
830 | return; | |
831 | } | |
832 | cdev->private->state = DEV_STATE_ONLINE; | |
833 | /* Call the handler. */ | |
834 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) | |
835 | /* Start delayed path verification. */ | |
836 | ccw_device_online_verify(cdev, 0); | |
837 | } | |
838 | ||
839 | static void | |
840 | ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event) | |
841 | { | |
842 | struct irb *irb; | |
843 | ||
844 | irb = (struct irb *) __LC_IRB; | |
845 | /* Accumulate status. We don't do basic sense. */ | |
846 | ccw_device_accumulate_irb(cdev, irb); | |
847 | /* Try to start delayed device verification. */ | |
848 | ccw_device_online_verify(cdev, 0); | |
849 | /* Note: Don't call handler for cio initiated clear! */ | |
850 | } | |
851 | ||
852 | static void | |
853 | ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
854 | { | |
855 | struct subchannel *sch; | |
856 | ||
857 | sch = to_subchannel(cdev->dev.parent); | |
858 | ccw_device_set_timeout(cdev, 0); | |
859 | /* OK, i/o is dead now. Call interrupt handler. */ | |
860 | cdev->private->state = DEV_STATE_ONLINE; | |
861 | if (cdev->handler) | |
862 | cdev->handler(cdev, cdev->private->intparm, | |
863 | ERR_PTR(-ETIMEDOUT)); | |
864 | if (!sch->lpm) { | |
865 | PREPARE_WORK(&cdev->private->kick_work, | |
866 | ccw_device_nopath_notify, (void *)cdev); | |
867 | queue_work(ccw_device_notify_work, &cdev->private->kick_work); | |
868 | } else if (cdev->private->flags.doverify) | |
869 | /* Start delayed path verification. */ | |
870 | ccw_device_online_verify(cdev, 0); | |
871 | } | |
872 | ||
873 | static void | |
874 | ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
875 | { | |
876 | int ret; | |
877 | ||
878 | ret = ccw_device_cancel_halt_clear(cdev); | |
879 | if (ret == -EBUSY) { | |
880 | ccw_device_set_timeout(cdev, 3*HZ); | |
881 | return; | |
882 | } | |
883 | if (ret == -ENODEV) { | |
884 | struct subchannel *sch; | |
885 | ||
886 | sch = to_subchannel(cdev->dev.parent); | |
887 | if (!sch->lpm) { | |
888 | PREPARE_WORK(&cdev->private->kick_work, | |
889 | ccw_device_nopath_notify, (void *)cdev); | |
890 | queue_work(ccw_device_notify_work, | |
891 | &cdev->private->kick_work); | |
892 | } else | |
893 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
894 | return; | |
895 | } | |
896 | //FIXME: Can we get here? | |
897 | cdev->private->state = DEV_STATE_ONLINE; | |
898 | if (cdev->handler) | |
899 | cdev->handler(cdev, cdev->private->intparm, | |
900 | ERR_PTR(-ETIMEDOUT)); | |
901 | } | |
902 | ||
903 | static void | |
904 | ccw_device_wait4io_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
905 | { | |
906 | struct irb *irb; | |
907 | struct subchannel *sch; | |
908 | ||
909 | irb = (struct irb *) __LC_IRB; | |
910 | /* | |
911 | * Accumulate status and find out if a basic sense is needed. | |
912 | * This is fine since we have already adapted the lpm. | |
913 | */ | |
914 | ccw_device_accumulate_irb(cdev, irb); | |
915 | if (cdev->private->flags.dosense) { | |
916 | if (ccw_device_do_sense(cdev, irb) == 0) { | |
917 | cdev->private->state = DEV_STATE_W4SENSE; | |
918 | } | |
919 | return; | |
920 | } | |
921 | ||
922 | /* Iff device is idle, reset timeout. */ | |
923 | sch = to_subchannel(cdev->dev.parent); | |
924 | if (!stsch(sch->irq, &sch->schib)) | |
925 | if (sch->schib.scsw.actl == 0) | |
926 | ccw_device_set_timeout(cdev, 0); | |
927 | /* Call the handler. */ | |
928 | ccw_device_call_handler(cdev); | |
929 | if (!sch->lpm) { | |
930 | PREPARE_WORK(&cdev->private->kick_work, | |
931 | ccw_device_nopath_notify, (void *)cdev); | |
932 | queue_work(ccw_device_notify_work, &cdev->private->kick_work); | |
933 | } else if (cdev->private->flags.doverify) | |
934 | ccw_device_online_verify(cdev, 0); | |
935 | } | |
936 | ||
937 | static void | |
938 | ccw_device_wait4io_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
939 | { | |
940 | int ret; | |
941 | struct subchannel *sch; | |
942 | ||
943 | sch = to_subchannel(cdev->dev.parent); | |
944 | ccw_device_set_timeout(cdev, 0); | |
945 | ret = ccw_device_cancel_halt_clear(cdev); | |
946 | if (ret == -EBUSY) { | |
947 | ccw_device_set_timeout(cdev, 3*HZ); | |
948 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; | |
949 | return; | |
950 | } | |
951 | if (ret == -ENODEV) { | |
952 | if (!sch->lpm) { | |
953 | PREPARE_WORK(&cdev->private->kick_work, | |
954 | ccw_device_nopath_notify, (void *)cdev); | |
955 | queue_work(ccw_device_notify_work, | |
956 | &cdev->private->kick_work); | |
957 | } else | |
958 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
959 | return; | |
960 | } | |
961 | if (cdev->handler) | |
962 | cdev->handler(cdev, cdev->private->intparm, | |
963 | ERR_PTR(-ETIMEDOUT)); | |
964 | if (!sch->lpm) { | |
965 | PREPARE_WORK(&cdev->private->kick_work, | |
966 | ccw_device_nopath_notify, (void *)cdev); | |
967 | queue_work(ccw_device_notify_work, &cdev->private->kick_work); | |
968 | } else if (cdev->private->flags.doverify) | |
969 | /* Start delayed path verification. */ | |
970 | ccw_device_online_verify(cdev, 0); | |
971 | } | |
972 | ||
973 | static void | |
974 | ccw_device_wait4io_verify(struct ccw_device *cdev, enum dev_event dev_event) | |
975 | { | |
976 | /* When the I/O has terminated, we have to start verification. */ | |
977 | if (cdev->private->options.pgroup) | |
978 | cdev->private->flags.doverify = 1; | |
979 | } | |
980 | ||
981 | static void | |
982 | ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event) | |
983 | { | |
984 | struct irb *irb; | |
985 | ||
986 | switch (dev_event) { | |
987 | case DEV_EVENT_INTERRUPT: | |
988 | irb = (struct irb *) __LC_IRB; | |
989 | /* Check for unsolicited interrupt. */ | |
990 | if ((irb->scsw.stctl == | |
991 | (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) && | |
992 | (!irb->scsw.cc)) | |
993 | /* FIXME: we should restart stlck here, but this | |
994 | * is extremely unlikely ... */ | |
995 | goto out_wakeup; | |
996 | ||
997 | ccw_device_accumulate_irb(cdev, irb); | |
998 | /* We don't care about basic sense etc. */ | |
999 | break; | |
1000 | default: /* timeout */ | |
1001 | break; | |
1002 | } | |
1003 | out_wakeup: | |
1004 | wake_up(&cdev->private->wait_q); | |
1005 | } | |
1006 | ||
1007 | static void | |
1008 | ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event) | |
1009 | { | |
1010 | struct subchannel *sch; | |
1011 | ||
1012 | sch = to_subchannel(cdev->dev.parent); | |
1013 | if (cio_enable_subchannel(sch, sch->schib.pmcw.isc) != 0) | |
1014 | /* Couldn't enable the subchannel for i/o. Sick device. */ | |
1015 | return; | |
1016 | ||
1017 | /* After 60s the device recognition is considered to have failed. */ | |
1018 | ccw_device_set_timeout(cdev, 60*HZ); | |
1019 | ||
1020 | cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID; | |
1021 | ccw_device_sense_id_start(cdev); | |
1022 | } | |
1023 | ||
1024 | void | |
1025 | device_trigger_reprobe(struct subchannel *sch) | |
1026 | { | |
1027 | struct ccw_device *cdev; | |
1028 | ||
1029 | if (!sch->dev.driver_data) | |
1030 | return; | |
1031 | cdev = sch->dev.driver_data; | |
1032 | if (cdev->private->state != DEV_STATE_DISCONNECTED) | |
1033 | return; | |
1034 | ||
1035 | /* Update some values. */ | |
1036 | if (stsch(sch->irq, &sch->schib)) | |
1037 | return; | |
1038 | ||
1039 | /* | |
1040 | * The pim, pam, pom values may not be accurate, but they are the best | |
1041 | * we have before performing device selection :/ | |
1042 | */ | |
1043 | sch->lpm = sch->schib.pmcw.pim & | |
1044 | sch->schib.pmcw.pam & | |
1045 | sch->schib.pmcw.pom & | |
1046 | sch->opm; | |
1047 | /* Re-set some bits in the pmcw that were lost. */ | |
1048 | sch->schib.pmcw.isc = 3; | |
1049 | sch->schib.pmcw.csense = 1; | |
1050 | sch->schib.pmcw.ena = 0; | |
1051 | if ((sch->lpm & (sch->lpm - 1)) != 0) | |
1052 | sch->schib.pmcw.mp = 1; | |
1053 | sch->schib.pmcw.intparm = (__u32)(unsigned long)sch; | |
1054 | /* We should also udate ssd info, but this has to wait. */ | |
1055 | ccw_device_start_id(cdev, 0); | |
1056 | } | |
1057 | ||
1058 | static void | |
1059 | ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
1060 | { | |
1061 | struct subchannel *sch; | |
1062 | ||
1063 | sch = to_subchannel(cdev->dev.parent); | |
1064 | /* | |
1065 | * An interrupt in state offline means a previous disable was not | |
1066 | * successful. Try again. | |
1067 | */ | |
1068 | cio_disable_subchannel(sch); | |
1069 | } | |
1070 | ||
1071 | static void | |
1072 | ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event) | |
1073 | { | |
1074 | retry_set_schib(cdev); | |
1075 | cdev->private->state = DEV_STATE_ONLINE; | |
1076 | dev_fsm_event(cdev, dev_event); | |
1077 | } | |
1078 | ||
1079 | ||
1080 | static void | |
1081 | ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event) | |
1082 | { | |
1083 | ccw_device_set_timeout(cdev, 0); | |
1084 | if (dev_event == DEV_EVENT_NOTOPER) | |
1085 | cdev->private->state = DEV_STATE_NOT_OPER; | |
1086 | else | |
1087 | cdev->private->state = DEV_STATE_OFFLINE; | |
1088 | wake_up(&cdev->private->wait_q); | |
1089 | } | |
1090 | ||
1091 | static void | |
1092 | ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
1093 | { | |
1094 | int ret; | |
1095 | ||
1096 | ret = ccw_device_cancel_halt_clear(cdev); | |
1097 | switch (ret) { | |
1098 | case 0: | |
1099 | cdev->private->state = DEV_STATE_OFFLINE; | |
1100 | wake_up(&cdev->private->wait_q); | |
1101 | break; | |
1102 | case -ENODEV: | |
1103 | cdev->private->state = DEV_STATE_NOT_OPER; | |
1104 | wake_up(&cdev->private->wait_q); | |
1105 | break; | |
1106 | default: | |
1107 | ccw_device_set_timeout(cdev, HZ/10); | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * No operation action. This is used e.g. to ignore a timeout event in | |
1113 | * state offline. | |
1114 | */ | |
1115 | static void | |
1116 | ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event) | |
1117 | { | |
1118 | } | |
1119 | ||
1120 | /* | |
1121 | * Bug operation action. | |
1122 | */ | |
1123 | static void | |
1124 | ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event) | |
1125 | { | |
1126 | printk(KERN_EMERG "dev_jumptable[%i][%i] == NULL\n", | |
1127 | cdev->private->state, dev_event); | |
1128 | BUG(); | |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | * device statemachine | |
1133 | */ | |
1134 | fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = { | |
1135 | [DEV_STATE_NOT_OPER] = { | |
1136 | [DEV_EVENT_NOTOPER] = ccw_device_nop, | |
1137 | [DEV_EVENT_INTERRUPT] = ccw_device_bug, | |
1138 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1139 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1140 | }, | |
1141 | [DEV_STATE_SENSE_PGID] = { | |
1142 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1143 | [DEV_EVENT_INTERRUPT] = ccw_device_sense_pgid_irq, | |
1144 | [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, | |
1145 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1146 | }, | |
1147 | [DEV_STATE_SENSE_ID] = { | |
1148 | [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper, | |
1149 | [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq, | |
1150 | [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout, | |
1151 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1152 | }, | |
1153 | [DEV_STATE_OFFLINE] = { | |
1154 | [DEV_EVENT_NOTOPER] = ccw_device_offline_notoper, | |
1155 | [DEV_EVENT_INTERRUPT] = ccw_device_offline_irq, | |
1156 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1157 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1158 | }, | |
1159 | [DEV_STATE_VERIFY] = { | |
1160 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1161 | [DEV_EVENT_INTERRUPT] = ccw_device_verify_irq, | |
1162 | [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, | |
1163 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1164 | }, | |
1165 | [DEV_STATE_ONLINE] = { | |
1166 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1167 | [DEV_EVENT_INTERRUPT] = ccw_device_irq, | |
1168 | [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout, | |
1169 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, | |
1170 | }, | |
1171 | [DEV_STATE_W4SENSE] = { | |
1172 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1173 | [DEV_EVENT_INTERRUPT] = ccw_device_w4sense, | |
1174 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1175 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, | |
1176 | }, | |
1177 | [DEV_STATE_DISBAND_PGID] = { | |
1178 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1179 | [DEV_EVENT_INTERRUPT] = ccw_device_disband_irq, | |
1180 | [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, | |
1181 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1182 | }, | |
1183 | [DEV_STATE_BOXED] = { | |
1184 | [DEV_EVENT_NOTOPER] = ccw_device_offline_notoper, | |
1185 | [DEV_EVENT_INTERRUPT] = ccw_device_stlck_done, | |
1186 | [DEV_EVENT_TIMEOUT] = ccw_device_stlck_done, | |
1187 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1188 | }, | |
1189 | /* states to wait for i/o completion before doing something */ | |
1190 | [DEV_STATE_CLEAR_VERIFY] = { | |
1191 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1192 | [DEV_EVENT_INTERRUPT] = ccw_device_clear_verify, | |
1193 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1194 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1195 | }, | |
1196 | [DEV_STATE_TIMEOUT_KILL] = { | |
1197 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1198 | [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq, | |
1199 | [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout, | |
1200 | [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME | |
1201 | }, | |
1202 | [DEV_STATE_WAIT4IO] = { | |
1203 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1204 | [DEV_EVENT_INTERRUPT] = ccw_device_wait4io_irq, | |
1205 | [DEV_EVENT_TIMEOUT] = ccw_device_wait4io_timeout, | |
1206 | [DEV_EVENT_VERIFY] = ccw_device_wait4io_verify, | |
1207 | }, | |
1208 | [DEV_STATE_QUIESCE] = { | |
1209 | [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done, | |
1210 | [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done, | |
1211 | [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout, | |
1212 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1213 | }, | |
1214 | /* special states for devices gone not operational */ | |
1215 | [DEV_STATE_DISCONNECTED] = { | |
1216 | [DEV_EVENT_NOTOPER] = ccw_device_nop, | |
1217 | [DEV_EVENT_INTERRUPT] = ccw_device_start_id, | |
1218 | [DEV_EVENT_TIMEOUT] = ccw_device_bug, | |
1219 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1220 | }, | |
1221 | [DEV_STATE_DISCONNECTED_SENSE_ID] = { | |
1222 | [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper, | |
1223 | [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq, | |
1224 | [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout, | |
1225 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1226 | }, | |
1227 | [DEV_STATE_CMFCHANGE] = { | |
1228 | [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate, | |
1229 | [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate, | |
1230 | [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate, | |
1231 | [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate, | |
1232 | }, | |
1233 | }; | |
1234 | ||
1235 | /* | |
1236 | * io_subchannel_irq is called for "real" interrupts or for status | |
1237 | * pending conditions on msch. | |
1238 | */ | |
1239 | void | |
1240 | io_subchannel_irq (struct device *pdev) | |
1241 | { | |
1242 | struct ccw_device *cdev; | |
1243 | ||
1244 | cdev = to_subchannel(pdev)->dev.driver_data; | |
1245 | ||
1246 | CIO_TRACE_EVENT (3, "IRQ"); | |
1247 | CIO_TRACE_EVENT (3, pdev->bus_id); | |
1248 | if (cdev) | |
1249 | dev_fsm_event(cdev, DEV_EVENT_INTERRUPT); | |
1250 | } | |
1251 | ||
1252 | EXPORT_SYMBOL_GPL(ccw_device_set_timeout); |