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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> | |
4e57b681 TS |
14 | #include <linux/jiffies.h> |
15 | #include <linux/string.h> | |
1da177e4 LT |
16 | |
17 | #include <asm/ccwdev.h> | |
4c24da79 | 18 | #include <asm/cio.h> |
1da177e4 LT |
19 | |
20 | #include "cio.h" | |
21 | #include "cio_debug.h" | |
22 | #include "css.h" | |
23 | #include "device.h" | |
24 | #include "chsc.h" | |
25 | #include "ioasm.h" | |
1da177e4 LT |
26 | |
27 | int | |
28 | device_is_online(struct subchannel *sch) | |
29 | { | |
30 | struct ccw_device *cdev; | |
31 | ||
32 | if (!sch->dev.driver_data) | |
33 | return 0; | |
34 | cdev = sch->dev.driver_data; | |
35 | return (cdev->private->state == DEV_STATE_ONLINE); | |
36 | } | |
37 | ||
38 | int | |
39 | device_is_disconnected(struct subchannel *sch) | |
40 | { | |
41 | struct ccw_device *cdev; | |
42 | ||
43 | if (!sch->dev.driver_data) | |
44 | return 0; | |
45 | cdev = sch->dev.driver_data; | |
46 | return (cdev->private->state == DEV_STATE_DISCONNECTED || | |
47 | cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID); | |
48 | } | |
49 | ||
50 | void | |
51 | device_set_disconnected(struct subchannel *sch) | |
52 | { | |
53 | struct ccw_device *cdev; | |
54 | ||
55 | if (!sch->dev.driver_data) | |
56 | return; | |
57 | cdev = sch->dev.driver_data; | |
58 | ccw_device_set_timeout(cdev, 0); | |
59 | cdev->private->flags.fake_irb = 0; | |
60 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
61 | } | |
62 | ||
63 | void | |
64 | device_set_waiting(struct subchannel *sch) | |
65 | { | |
66 | struct ccw_device *cdev; | |
67 | ||
68 | if (!sch->dev.driver_data) | |
69 | return; | |
70 | cdev = sch->dev.driver_data; | |
71 | ccw_device_set_timeout(cdev, 10*HZ); | |
72 | cdev->private->state = DEV_STATE_WAIT4IO; | |
73 | } | |
74 | ||
75 | /* | |
76 | * Timeout function. It just triggers a DEV_EVENT_TIMEOUT. | |
77 | */ | |
78 | static void | |
79 | ccw_device_timeout(unsigned long data) | |
80 | { | |
81 | struct ccw_device *cdev; | |
82 | ||
83 | cdev = (struct ccw_device *) data; | |
84 | spin_lock_irq(cdev->ccwlock); | |
85 | dev_fsm_event(cdev, DEV_EVENT_TIMEOUT); | |
86 | spin_unlock_irq(cdev->ccwlock); | |
87 | } | |
88 | ||
89 | /* | |
90 | * Set timeout | |
91 | */ | |
92 | void | |
93 | ccw_device_set_timeout(struct ccw_device *cdev, int expires) | |
94 | { | |
95 | if (expires == 0) { | |
96 | del_timer(&cdev->private->timer); | |
97 | return; | |
98 | } | |
99 | if (timer_pending(&cdev->private->timer)) { | |
100 | if (mod_timer(&cdev->private->timer, jiffies + expires)) | |
101 | return; | |
102 | } | |
103 | cdev->private->timer.function = ccw_device_timeout; | |
104 | cdev->private->timer.data = (unsigned long) cdev; | |
105 | cdev->private->timer.expires = jiffies + expires; | |
106 | add_timer(&cdev->private->timer); | |
107 | } | |
108 | ||
109 | /* Kill any pending timers after machine check. */ | |
110 | void | |
111 | device_kill_pending_timer(struct subchannel *sch) | |
112 | { | |
113 | struct ccw_device *cdev; | |
114 | ||
115 | if (!sch->dev.driver_data) | |
116 | return; | |
117 | cdev = sch->dev.driver_data; | |
118 | ccw_device_set_timeout(cdev, 0); | |
119 | } | |
120 | ||
121 | /* | |
122 | * Cancel running i/o. This is called repeatedly since halt/clear are | |
123 | * asynchronous operations. We do one try with cio_cancel, two tries | |
124 | * with cio_halt, 255 tries with cio_clear. If everythings fails panic. | |
125 | * Returns 0 if device now idle, -ENODEV for device not operational and | |
126 | * -EBUSY if an interrupt is expected (either from halt/clear or from a | |
127 | * status pending). | |
128 | */ | |
129 | int | |
130 | ccw_device_cancel_halt_clear(struct ccw_device *cdev) | |
131 | { | |
132 | struct subchannel *sch; | |
133 | int ret; | |
134 | ||
135 | sch = to_subchannel(cdev->dev.parent); | |
136 | ret = stsch(sch->irq, &sch->schib); | |
137 | if (ret || !sch->schib.pmcw.dnv) | |
138 | return -ENODEV; | |
139 | if (!sch->schib.pmcw.ena || sch->schib.scsw.actl == 0) | |
140 | /* Not operational or no activity -> done. */ | |
141 | return 0; | |
142 | /* Stage 1: cancel io. */ | |
143 | if (!(sch->schib.scsw.actl & SCSW_ACTL_HALT_PEND) && | |
144 | !(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) { | |
145 | ret = cio_cancel(sch); | |
146 | if (ret != -EINVAL) | |
147 | return ret; | |
148 | /* cancel io unsuccessful. From now on it is asynchronous. */ | |
149 | cdev->private->iretry = 3; /* 3 halt retries. */ | |
150 | } | |
151 | if (!(sch->schib.scsw.actl & SCSW_ACTL_CLEAR_PEND)) { | |
152 | /* Stage 2: halt io. */ | |
153 | if (cdev->private->iretry) { | |
154 | cdev->private->iretry--; | |
155 | ret = cio_halt(sch); | |
156 | return (ret == 0) ? -EBUSY : ret; | |
157 | } | |
158 | /* halt io unsuccessful. */ | |
159 | cdev->private->iretry = 255; /* 255 clear retries. */ | |
160 | } | |
161 | /* Stage 3: clear io. */ | |
162 | if (cdev->private->iretry) { | |
163 | cdev->private->iretry--; | |
164 | ret = cio_clear (sch); | |
165 | return (ret == 0) ? -EBUSY : ret; | |
166 | } | |
167 | panic("Can't stop i/o on subchannel.\n"); | |
168 | } | |
169 | ||
170 | static int | |
171 | ccw_device_handle_oper(struct ccw_device *cdev) | |
172 | { | |
173 | struct subchannel *sch; | |
174 | ||
175 | sch = to_subchannel(cdev->dev.parent); | |
176 | cdev->private->flags.recog_done = 1; | |
177 | /* | |
178 | * Check if cu type and device type still match. If | |
179 | * not, it is certainly another device and we have to | |
180 | * de- and re-register. Also check here for non-matching devno. | |
181 | */ | |
182 | if (cdev->id.cu_type != cdev->private->senseid.cu_type || | |
183 | cdev->id.cu_model != cdev->private->senseid.cu_model || | |
184 | cdev->id.dev_type != cdev->private->senseid.dev_type || | |
185 | cdev->id.dev_model != cdev->private->senseid.dev_model || | |
186 | cdev->private->devno != sch->schib.pmcw.dev) { | |
187 | PREPARE_WORK(&cdev->private->kick_work, | |
188 | ccw_device_do_unreg_rereg, (void *)cdev); | |
189 | queue_work(ccw_device_work, &cdev->private->kick_work); | |
190 | return 0; | |
191 | } | |
192 | cdev->private->flags.donotify = 1; | |
193 | return 1; | |
194 | } | |
195 | ||
196 | /* | |
197 | * The machine won't give us any notification by machine check if a chpid has | |
198 | * been varied online on the SE so we have to find out by magic (i. e. driving | |
199 | * the channel subsystem to device selection and updating our path masks). | |
200 | */ | |
201 | static inline void | |
202 | __recover_lost_chpids(struct subchannel *sch, int old_lpm) | |
203 | { | |
204 | int mask, i; | |
205 | ||
206 | for (i = 0; i<8; i++) { | |
207 | mask = 0x80 >> i; | |
208 | if (!(sch->lpm & mask)) | |
209 | continue; | |
210 | if (old_lpm & mask) | |
211 | continue; | |
212 | chpid_is_actually_online(sch->schib.pmcw.chpid[i]); | |
213 | } | |
214 | } | |
215 | ||
216 | /* | |
217 | * Stop device recognition. | |
218 | */ | |
219 | static void | |
220 | ccw_device_recog_done(struct ccw_device *cdev, int state) | |
221 | { | |
222 | struct subchannel *sch; | |
223 | int notify, old_lpm, same_dev; | |
224 | ||
225 | sch = to_subchannel(cdev->dev.parent); | |
226 | ||
227 | ccw_device_set_timeout(cdev, 0); | |
228 | cio_disable_subchannel(sch); | |
229 | /* | |
230 | * Now that we tried recognition, we have performed device selection | |
231 | * through ssch() and the path information is up to date. | |
232 | */ | |
233 | old_lpm = sch->lpm; | |
234 | stsch(sch->irq, &sch->schib); | |
235 | sch->lpm = sch->schib.pmcw.pim & | |
236 | sch->schib.pmcw.pam & | |
237 | sch->schib.pmcw.pom & | |
238 | sch->opm; | |
4ffa9234 CH |
239 | /* Check since device may again have become not operational. */ |
240 | if (!sch->schib.pmcw.dnv) | |
241 | state = DEV_STATE_NOT_OPER; | |
1da177e4 LT |
242 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) |
243 | /* Force reprobe on all chpids. */ | |
244 | old_lpm = 0; | |
245 | if (sch->lpm != old_lpm) | |
246 | __recover_lost_chpids(sch, old_lpm); | |
247 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) { | |
248 | if (state == DEV_STATE_NOT_OPER) { | |
249 | cdev->private->flags.recog_done = 1; | |
250 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
251 | return; | |
252 | } | |
253 | /* Boxed devices don't need extra treatment. */ | |
254 | } | |
255 | notify = 0; | |
256 | same_dev = 0; /* Keep the compiler quiet... */ | |
257 | switch (state) { | |
258 | case DEV_STATE_NOT_OPER: | |
259 | CIO_DEBUG(KERN_WARNING, 2, | |
260 | "SenseID : unknown device %04x on subchannel %04x\n", | |
261 | cdev->private->devno, sch->irq); | |
262 | break; | |
263 | case DEV_STATE_OFFLINE: | |
264 | if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) { | |
265 | same_dev = ccw_device_handle_oper(cdev); | |
266 | notify = 1; | |
267 | } | |
268 | /* fill out sense information */ | |
269 | cdev->id = (struct ccw_device_id) { | |
270 | .cu_type = cdev->private->senseid.cu_type, | |
271 | .cu_model = cdev->private->senseid.cu_model, | |
272 | .dev_type = cdev->private->senseid.dev_type, | |
273 | .dev_model = cdev->private->senseid.dev_model, | |
274 | }; | |
275 | if (notify) { | |
276 | cdev->private->state = DEV_STATE_OFFLINE; | |
277 | if (same_dev) { | |
278 | /* Get device online again. */ | |
279 | ccw_device_online(cdev); | |
280 | wake_up(&cdev->private->wait_q); | |
281 | } | |
282 | return; | |
283 | } | |
284 | /* Issue device info message. */ | |
285 | CIO_DEBUG(KERN_INFO, 2, "SenseID : device %04x reports: " | |
286 | "CU Type/Mod = %04X/%02X, Dev Type/Mod = " | |
287 | "%04X/%02X\n", cdev->private->devno, | |
288 | cdev->id.cu_type, cdev->id.cu_model, | |
289 | cdev->id.dev_type, cdev->id.dev_model); | |
290 | break; | |
291 | case DEV_STATE_BOXED: | |
292 | CIO_DEBUG(KERN_WARNING, 2, | |
293 | "SenseID : boxed device %04x on subchannel %04x\n", | |
294 | cdev->private->devno, sch->irq); | |
295 | break; | |
296 | } | |
297 | cdev->private->state = state; | |
298 | io_subchannel_recog_done(cdev); | |
299 | if (state != DEV_STATE_NOT_OPER) | |
300 | wake_up(&cdev->private->wait_q); | |
301 | } | |
302 | ||
303 | /* | |
304 | * Function called from device_id.c after sense id has completed. | |
305 | */ | |
306 | void | |
307 | ccw_device_sense_id_done(struct ccw_device *cdev, int err) | |
308 | { | |
309 | switch (err) { | |
310 | case 0: | |
311 | ccw_device_recog_done(cdev, DEV_STATE_OFFLINE); | |
312 | break; | |
313 | case -ETIME: /* Sense id stopped by timeout. */ | |
314 | ccw_device_recog_done(cdev, DEV_STATE_BOXED); | |
315 | break; | |
316 | default: | |
317 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
318 | break; | |
319 | } | |
320 | } | |
321 | ||
322 | static void | |
323 | ccw_device_oper_notify(void *data) | |
324 | { | |
325 | struct ccw_device *cdev; | |
326 | struct subchannel *sch; | |
327 | int ret; | |
328 | ||
329 | cdev = (struct ccw_device *)data; | |
330 | sch = to_subchannel(cdev->dev.parent); | |
331 | ret = (sch->driver && sch->driver->notify) ? | |
332 | sch->driver->notify(&sch->dev, CIO_OPER) : 0; | |
333 | if (!ret) | |
334 | /* Driver doesn't want device back. */ | |
335 | ccw_device_do_unreg_rereg((void *)cdev); | |
336 | else | |
337 | wake_up(&cdev->private->wait_q); | |
338 | } | |
339 | ||
340 | /* | |
341 | * Finished with online/offline processing. | |
342 | */ | |
343 | static void | |
344 | ccw_device_done(struct ccw_device *cdev, int state) | |
345 | { | |
346 | struct subchannel *sch; | |
347 | ||
348 | sch = to_subchannel(cdev->dev.parent); | |
349 | ||
350 | if (state != DEV_STATE_ONLINE) | |
351 | cio_disable_subchannel(sch); | |
352 | ||
353 | /* Reset device status. */ | |
354 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
355 | ||
356 | cdev->private->state = state; | |
357 | ||
358 | ||
359 | if (state == DEV_STATE_BOXED) | |
360 | CIO_DEBUG(KERN_WARNING, 2, | |
361 | "Boxed device %04x on subchannel %04x\n", | |
362 | cdev->private->devno, sch->irq); | |
363 | ||
364 | if (cdev->private->flags.donotify) { | |
365 | cdev->private->flags.donotify = 0; | |
366 | PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify, | |
367 | (void *)cdev); | |
368 | queue_work(ccw_device_notify_work, &cdev->private->kick_work); | |
369 | } | |
370 | wake_up(&cdev->private->wait_q); | |
371 | ||
372 | if (css_init_done && state != DEV_STATE_ONLINE) | |
373 | put_device (&cdev->dev); | |
374 | } | |
375 | ||
376 | /* | |
377 | * Function called from device_pgid.c after sense path ground has completed. | |
378 | */ | |
379 | void | |
380 | ccw_device_sense_pgid_done(struct ccw_device *cdev, int err) | |
381 | { | |
382 | struct subchannel *sch; | |
383 | ||
384 | sch = to_subchannel(cdev->dev.parent); | |
385 | switch (err) { | |
386 | case 0: | |
387 | /* Start Path Group verification. */ | |
388 | sch->vpm = 0; /* Start with no path groups set. */ | |
389 | cdev->private->state = DEV_STATE_VERIFY; | |
390 | ccw_device_verify_start(cdev); | |
391 | break; | |
392 | case -ETIME: /* Sense path group id stopped by timeout. */ | |
393 | case -EUSERS: /* device is reserved for someone else. */ | |
394 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
395 | break; | |
396 | case -EOPNOTSUPP: /* path grouping not supported, just set online. */ | |
397 | cdev->private->options.pgroup = 0; | |
398 | ccw_device_done(cdev, DEV_STATE_ONLINE); | |
399 | break; | |
400 | default: | |
401 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
402 | break; | |
403 | } | |
404 | } | |
405 | ||
406 | /* | |
407 | * Start device recognition. | |
408 | */ | |
409 | int | |
410 | ccw_device_recognition(struct ccw_device *cdev) | |
411 | { | |
412 | struct subchannel *sch; | |
413 | int ret; | |
414 | ||
415 | if ((cdev->private->state != DEV_STATE_NOT_OPER) && | |
416 | (cdev->private->state != DEV_STATE_BOXED)) | |
417 | return -EINVAL; | |
418 | sch = to_subchannel(cdev->dev.parent); | |
419 | ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc); | |
420 | if (ret != 0) | |
421 | /* Couldn't enable the subchannel for i/o. Sick device. */ | |
422 | return ret; | |
423 | ||
424 | /* After 60s the device recognition is considered to have failed. */ | |
425 | ccw_device_set_timeout(cdev, 60*HZ); | |
426 | ||
427 | /* | |
428 | * We used to start here with a sense pgid to find out whether a device | |
429 | * is locked by someone else. Unfortunately, the sense pgid command | |
430 | * code has other meanings on devices predating the path grouping | |
431 | * algorithm, so we start with sense id and box the device after an | |
432 | * timeout (or if sense pgid during path verification detects the device | |
433 | * is locked, as may happen on newer devices). | |
434 | */ | |
435 | cdev->private->flags.recog_done = 0; | |
436 | cdev->private->state = DEV_STATE_SENSE_ID; | |
437 | ccw_device_sense_id_start(cdev); | |
438 | return 0; | |
439 | } | |
440 | ||
441 | /* | |
442 | * Handle timeout in device recognition. | |
443 | */ | |
444 | static void | |
445 | ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
446 | { | |
447 | int ret; | |
448 | ||
449 | ret = ccw_device_cancel_halt_clear(cdev); | |
450 | switch (ret) { | |
451 | case 0: | |
452 | ccw_device_recog_done(cdev, DEV_STATE_BOXED); | |
453 | break; | |
454 | case -ENODEV: | |
455 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
456 | break; | |
457 | default: | |
458 | ccw_device_set_timeout(cdev, 3*HZ); | |
459 | } | |
460 | } | |
461 | ||
462 | ||
463 | static void | |
464 | ccw_device_nopath_notify(void *data) | |
465 | { | |
466 | struct ccw_device *cdev; | |
467 | struct subchannel *sch; | |
468 | int ret; | |
469 | ||
470 | cdev = (struct ccw_device *)data; | |
471 | sch = to_subchannel(cdev->dev.parent); | |
472 | /* Extra sanity. */ | |
473 | if (sch->lpm) | |
474 | return; | |
475 | ret = (sch->driver && sch->driver->notify) ? | |
476 | sch->driver->notify(&sch->dev, CIO_NO_PATH) : 0; | |
477 | if (!ret) { | |
478 | if (get_device(&sch->dev)) { | |
479 | /* Driver doesn't want to keep device. */ | |
480 | cio_disable_subchannel(sch); | |
481 | if (get_device(&cdev->dev)) { | |
482 | PREPARE_WORK(&cdev->private->kick_work, | |
483 | ccw_device_call_sch_unregister, | |
484 | (void *)cdev); | |
485 | queue_work(ccw_device_work, | |
486 | &cdev->private->kick_work); | |
487 | } else | |
488 | put_device(&sch->dev); | |
489 | } | |
490 | } else { | |
491 | cio_disable_subchannel(sch); | |
492 | ccw_device_set_timeout(cdev, 0); | |
493 | cdev->private->flags.fake_irb = 0; | |
494 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
495 | wake_up(&cdev->private->wait_q); | |
496 | } | |
497 | } | |
498 | ||
499 | void | |
500 | ccw_device_verify_done(struct ccw_device *cdev, int err) | |
501 | { | |
502 | cdev->private->flags.doverify = 0; | |
503 | switch (err) { | |
504 | case -EOPNOTSUPP: /* path grouping not supported, just set online. */ | |
505 | cdev->private->options.pgroup = 0; | |
506 | case 0: | |
507 | ccw_device_done(cdev, DEV_STATE_ONLINE); | |
508 | /* Deliver fake irb to device driver, if needed. */ | |
509 | if (cdev->private->flags.fake_irb) { | |
510 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
511 | cdev->private->irb.scsw = (struct scsw) { | |
512 | .cc = 1, | |
513 | .fctl = SCSW_FCTL_START_FUNC, | |
514 | .actl = SCSW_ACTL_START_PEND, | |
515 | .stctl = SCSW_STCTL_STATUS_PEND, | |
516 | }; | |
517 | cdev->private->flags.fake_irb = 0; | |
518 | if (cdev->handler) | |
519 | cdev->handler(cdev, cdev->private->intparm, | |
520 | &cdev->private->irb); | |
521 | memset(&cdev->private->irb, 0, sizeof(struct irb)); | |
522 | } | |
523 | break; | |
524 | case -ETIME: | |
525 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
526 | break; | |
527 | default: | |
528 | PREPARE_WORK(&cdev->private->kick_work, | |
529 | ccw_device_nopath_notify, (void *)cdev); | |
530 | queue_work(ccw_device_notify_work, &cdev->private->kick_work); | |
531 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
532 | break; | |
533 | } | |
534 | } | |
535 | ||
536 | /* | |
537 | * Get device online. | |
538 | */ | |
539 | int | |
540 | ccw_device_online(struct ccw_device *cdev) | |
541 | { | |
542 | struct subchannel *sch; | |
543 | int ret; | |
544 | ||
545 | if ((cdev->private->state != DEV_STATE_OFFLINE) && | |
546 | (cdev->private->state != DEV_STATE_BOXED)) | |
547 | return -EINVAL; | |
548 | sch = to_subchannel(cdev->dev.parent); | |
549 | if (css_init_done && !get_device(&cdev->dev)) | |
550 | return -ENODEV; | |
551 | ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc); | |
552 | if (ret != 0) { | |
553 | /* Couldn't enable the subchannel for i/o. Sick device. */ | |
554 | if (ret == -ENODEV) | |
555 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
556 | return ret; | |
557 | } | |
558 | /* Do we want to do path grouping? */ | |
559 | if (!cdev->private->options.pgroup) { | |
560 | /* No, set state online immediately. */ | |
561 | ccw_device_done(cdev, DEV_STATE_ONLINE); | |
562 | return 0; | |
563 | } | |
564 | /* Do a SensePGID first. */ | |
565 | cdev->private->state = DEV_STATE_SENSE_PGID; | |
566 | ccw_device_sense_pgid_start(cdev); | |
567 | return 0; | |
568 | } | |
569 | ||
570 | void | |
571 | ccw_device_disband_done(struct ccw_device *cdev, int err) | |
572 | { | |
573 | switch (err) { | |
574 | case 0: | |
575 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
576 | break; | |
577 | case -ETIME: | |
578 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
579 | break; | |
580 | default: | |
581 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
582 | break; | |
583 | } | |
584 | } | |
585 | ||
586 | /* | |
587 | * Shutdown device. | |
588 | */ | |
589 | int | |
590 | ccw_device_offline(struct ccw_device *cdev) | |
591 | { | |
592 | struct subchannel *sch; | |
593 | ||
594 | sch = to_subchannel(cdev->dev.parent); | |
595 | if (stsch(sch->irq, &sch->schib) || !sch->schib.pmcw.dnv) | |
596 | return -ENODEV; | |
597 | if (cdev->private->state != DEV_STATE_ONLINE) { | |
598 | if (sch->schib.scsw.actl != 0) | |
599 | return -EBUSY; | |
600 | return -EINVAL; | |
601 | } | |
602 | if (sch->schib.scsw.actl != 0) | |
603 | return -EBUSY; | |
604 | /* Are we doing path grouping? */ | |
605 | if (!cdev->private->options.pgroup) { | |
606 | /* No, set state offline immediately. */ | |
607 | ccw_device_done(cdev, DEV_STATE_OFFLINE); | |
608 | return 0; | |
609 | } | |
610 | /* Start Set Path Group commands. */ | |
611 | cdev->private->state = DEV_STATE_DISBAND_PGID; | |
612 | ccw_device_disband_start(cdev); | |
613 | return 0; | |
614 | } | |
615 | ||
616 | /* | |
617 | * Handle timeout in device online/offline process. | |
618 | */ | |
619 | static void | |
620 | ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
621 | { | |
622 | int ret; | |
623 | ||
624 | ret = ccw_device_cancel_halt_clear(cdev); | |
625 | switch (ret) { | |
626 | case 0: | |
627 | ccw_device_done(cdev, DEV_STATE_BOXED); | |
628 | break; | |
629 | case -ENODEV: | |
630 | ccw_device_done(cdev, DEV_STATE_NOT_OPER); | |
631 | break; | |
632 | default: | |
633 | ccw_device_set_timeout(cdev, 3*HZ); | |
634 | } | |
635 | } | |
636 | ||
637 | /* | |
638 | * Handle not oper event in device recognition. | |
639 | */ | |
640 | static void | |
641 | ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event) | |
642 | { | |
643 | ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER); | |
644 | } | |
645 | ||
646 | /* | |
647 | * Handle not operational event while offline. | |
648 | */ | |
649 | static void | |
650 | ccw_device_offline_notoper(struct ccw_device *cdev, enum dev_event dev_event) | |
651 | { | |
652 | struct subchannel *sch; | |
653 | ||
654 | cdev->private->state = DEV_STATE_NOT_OPER; | |
655 | sch = to_subchannel(cdev->dev.parent); | |
656 | if (get_device(&cdev->dev)) { | |
657 | PREPARE_WORK(&cdev->private->kick_work, | |
658 | ccw_device_call_sch_unregister, (void *)cdev); | |
659 | queue_work(ccw_device_work, &cdev->private->kick_work); | |
660 | } | |
661 | wake_up(&cdev->private->wait_q); | |
662 | } | |
663 | ||
664 | /* | |
665 | * Handle not operational event while online. | |
666 | */ | |
667 | static void | |
668 | ccw_device_online_notoper(struct ccw_device *cdev, enum dev_event dev_event) | |
669 | { | |
670 | struct subchannel *sch; | |
671 | ||
672 | sch = to_subchannel(cdev->dev.parent); | |
673 | if (sch->driver->notify && | |
674 | sch->driver->notify(&sch->dev, sch->lpm ? CIO_GONE : CIO_NO_PATH)) { | |
675 | ccw_device_set_timeout(cdev, 0); | |
676 | cdev->private->flags.fake_irb = 0; | |
677 | cdev->private->state = DEV_STATE_DISCONNECTED; | |
678 | wake_up(&cdev->private->wait_q); | |
679 | return; | |
680 | } | |
681 | cdev->private->state = DEV_STATE_NOT_OPER; | |
682 | cio_disable_subchannel(sch); | |
683 | if (sch->schib.scsw.actl != 0) { | |
684 | // FIXME: not-oper indication to device driver ? | |
685 | ccw_device_call_handler(cdev); | |
686 | } | |
687 | if (get_device(&cdev->dev)) { | |
688 | PREPARE_WORK(&cdev->private->kick_work, | |
689 | ccw_device_call_sch_unregister, (void *)cdev); | |
690 | queue_work(ccw_device_work, &cdev->private->kick_work); | |
691 | } | |
692 | wake_up(&cdev->private->wait_q); | |
693 | } | |
694 | ||
695 | /* | |
696 | * Handle path verification event. | |
697 | */ | |
698 | static void | |
699 | ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event) | |
700 | { | |
701 | struct subchannel *sch; | |
702 | ||
703 | if (!cdev->private->options.pgroup) | |
704 | return; | |
705 | if (cdev->private->state == DEV_STATE_W4SENSE) { | |
706 | cdev->private->flags.doverify = 1; | |
707 | return; | |
708 | } | |
709 | sch = to_subchannel(cdev->dev.parent); | |
710 | /* | |
711 | * Since we might not just be coming from an interrupt from the | |
712 | * subchannel we have to update the schib. | |
713 | */ | |
714 | stsch(sch->irq, &sch->schib); | |
715 | ||
716 | if (sch->schib.scsw.actl != 0 || | |
717 | (cdev->private->irb.scsw.stctl & SCSW_STCTL_STATUS_PEND)) { | |
718 | /* | |
719 | * No final status yet or final status not yet delivered | |
720 | * to the device driver. Can't do path verfication now, | |
721 | * delay until final status was delivered. | |
722 | */ | |
723 | cdev->private->flags.doverify = 1; | |
724 | return; | |
725 | } | |
726 | /* Device is idle, we can do the path verification. */ | |
727 | cdev->private->state = DEV_STATE_VERIFY; | |
728 | ccw_device_verify_start(cdev); | |
729 | } | |
730 | ||
731 | /* | |
732 | * Got an interrupt for a normal io (state online). | |
733 | */ | |
734 | static void | |
735 | ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
736 | { | |
737 | struct irb *irb; | |
738 | ||
739 | irb = (struct irb *) __LC_IRB; | |
740 | /* Check for unsolicited interrupt. */ | |
741 | if ((irb->scsw.stctl == | |
742 | (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) | |
743 | && (!irb->scsw.cc)) { | |
744 | if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) && | |
745 | !irb->esw.esw0.erw.cons) { | |
746 | /* Unit check but no sense data. Need basic sense. */ | |
747 | if (ccw_device_do_sense(cdev, irb) != 0) | |
748 | goto call_handler_unsol; | |
749 | memcpy(irb, &cdev->private->irb, sizeof(struct irb)); | |
750 | cdev->private->state = DEV_STATE_W4SENSE; | |
751 | cdev->private->intparm = 0; | |
752 | return; | |
753 | } | |
754 | call_handler_unsol: | |
755 | if (cdev->handler) | |
756 | cdev->handler (cdev, 0, irb); | |
757 | return; | |
758 | } | |
759 | /* Accumulate status and find out if a basic sense is needed. */ | |
760 | ccw_device_accumulate_irb(cdev, irb); | |
761 | if (cdev->private->flags.dosense) { | |
762 | if (ccw_device_do_sense(cdev, irb) == 0) { | |
763 | cdev->private->state = DEV_STATE_W4SENSE; | |
764 | } | |
765 | return; | |
766 | } | |
767 | /* Call the handler. */ | |
768 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) | |
769 | /* Start delayed path verification. */ | |
770 | ccw_device_online_verify(cdev, 0); | |
771 | } | |
772 | ||
773 | /* | |
774 | * Got an timeout in online state. | |
775 | */ | |
776 | static void | |
777 | ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
778 | { | |
779 | int ret; | |
780 | ||
781 | ccw_device_set_timeout(cdev, 0); | |
782 | ret = ccw_device_cancel_halt_clear(cdev); | |
783 | if (ret == -EBUSY) { | |
784 | ccw_device_set_timeout(cdev, 3*HZ); | |
785 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; | |
786 | return; | |
787 | } | |
788 | if (ret == -ENODEV) { | |
789 | struct subchannel *sch; | |
790 | ||
791 | sch = to_subchannel(cdev->dev.parent); | |
792 | if (!sch->lpm) { | |
793 | PREPARE_WORK(&cdev->private->kick_work, | |
794 | ccw_device_nopath_notify, (void *)cdev); | |
795 | queue_work(ccw_device_notify_work, | |
796 | &cdev->private->kick_work); | |
797 | } else | |
798 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
799 | } else if (cdev->handler) | |
800 | cdev->handler(cdev, cdev->private->intparm, | |
801 | ERR_PTR(-ETIMEDOUT)); | |
802 | } | |
803 | ||
804 | /* | |
805 | * Got an interrupt for a basic sense. | |
806 | */ | |
807 | void | |
808 | ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event) | |
809 | { | |
810 | struct irb *irb; | |
811 | ||
812 | irb = (struct irb *) __LC_IRB; | |
813 | /* Check for unsolicited interrupt. */ | |
814 | if (irb->scsw.stctl == | |
815 | (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) { | |
816 | if (irb->scsw.cc == 1) | |
817 | /* Basic sense hasn't started. Try again. */ | |
818 | ccw_device_do_sense(cdev, irb); | |
819 | else { | |
820 | printk("Huh? %s(%s): unsolicited interrupt...\n", | |
821 | __FUNCTION__, cdev->dev.bus_id); | |
822 | if (cdev->handler) | |
823 | cdev->handler (cdev, 0, irb); | |
824 | } | |
825 | return; | |
826 | } | |
827 | /* Add basic sense info to irb. */ | |
828 | ccw_device_accumulate_basic_sense(cdev, irb); | |
829 | if (cdev->private->flags.dosense) { | |
830 | /* Another basic sense is needed. */ | |
831 | ccw_device_do_sense(cdev, irb); | |
832 | return; | |
833 | } | |
834 | cdev->private->state = DEV_STATE_ONLINE; | |
835 | /* Call the handler. */ | |
836 | if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify) | |
837 | /* Start delayed path verification. */ | |
838 | ccw_device_online_verify(cdev, 0); | |
839 | } | |
840 | ||
841 | static void | |
842 | ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event) | |
843 | { | |
844 | struct irb *irb; | |
845 | ||
846 | irb = (struct irb *) __LC_IRB; | |
847 | /* Accumulate status. We don't do basic sense. */ | |
848 | ccw_device_accumulate_irb(cdev, irb); | |
849 | /* Try to start delayed device verification. */ | |
850 | ccw_device_online_verify(cdev, 0); | |
851 | /* Note: Don't call handler for cio initiated clear! */ | |
852 | } | |
853 | ||
854 | static void | |
855 | ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
856 | { | |
857 | struct subchannel *sch; | |
858 | ||
859 | sch = to_subchannel(cdev->dev.parent); | |
860 | ccw_device_set_timeout(cdev, 0); | |
861 | /* OK, i/o is dead now. Call interrupt handler. */ | |
862 | cdev->private->state = DEV_STATE_ONLINE; | |
863 | if (cdev->handler) | |
864 | cdev->handler(cdev, cdev->private->intparm, | |
865 | ERR_PTR(-ETIMEDOUT)); | |
866 | if (!sch->lpm) { | |
867 | PREPARE_WORK(&cdev->private->kick_work, | |
868 | ccw_device_nopath_notify, (void *)cdev); | |
869 | queue_work(ccw_device_notify_work, &cdev->private->kick_work); | |
870 | } else if (cdev->private->flags.doverify) | |
871 | /* Start delayed path verification. */ | |
872 | ccw_device_online_verify(cdev, 0); | |
873 | } | |
874 | ||
875 | static void | |
876 | ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
877 | { | |
878 | int ret; | |
879 | ||
880 | ret = ccw_device_cancel_halt_clear(cdev); | |
881 | if (ret == -EBUSY) { | |
882 | ccw_device_set_timeout(cdev, 3*HZ); | |
883 | return; | |
884 | } | |
885 | if (ret == -ENODEV) { | |
886 | struct subchannel *sch; | |
887 | ||
888 | sch = to_subchannel(cdev->dev.parent); | |
889 | if (!sch->lpm) { | |
890 | PREPARE_WORK(&cdev->private->kick_work, | |
891 | ccw_device_nopath_notify, (void *)cdev); | |
892 | queue_work(ccw_device_notify_work, | |
893 | &cdev->private->kick_work); | |
894 | } else | |
895 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
896 | return; | |
897 | } | |
898 | //FIXME: Can we get here? | |
899 | cdev->private->state = DEV_STATE_ONLINE; | |
900 | if (cdev->handler) | |
901 | cdev->handler(cdev, cdev->private->intparm, | |
902 | ERR_PTR(-ETIMEDOUT)); | |
903 | } | |
904 | ||
905 | static void | |
906 | ccw_device_wait4io_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
907 | { | |
908 | struct irb *irb; | |
909 | struct subchannel *sch; | |
910 | ||
911 | irb = (struct irb *) __LC_IRB; | |
912 | /* | |
913 | * Accumulate status and find out if a basic sense is needed. | |
914 | * This is fine since we have already adapted the lpm. | |
915 | */ | |
916 | ccw_device_accumulate_irb(cdev, irb); | |
917 | if (cdev->private->flags.dosense) { | |
918 | if (ccw_device_do_sense(cdev, irb) == 0) { | |
919 | cdev->private->state = DEV_STATE_W4SENSE; | |
920 | } | |
921 | return; | |
922 | } | |
923 | ||
924 | /* Iff device is idle, reset timeout. */ | |
925 | sch = to_subchannel(cdev->dev.parent); | |
926 | if (!stsch(sch->irq, &sch->schib)) | |
927 | if (sch->schib.scsw.actl == 0) | |
928 | ccw_device_set_timeout(cdev, 0); | |
929 | /* Call the handler. */ | |
930 | ccw_device_call_handler(cdev); | |
931 | if (!sch->lpm) { | |
932 | PREPARE_WORK(&cdev->private->kick_work, | |
933 | ccw_device_nopath_notify, (void *)cdev); | |
934 | queue_work(ccw_device_notify_work, &cdev->private->kick_work); | |
935 | } else if (cdev->private->flags.doverify) | |
936 | ccw_device_online_verify(cdev, 0); | |
937 | } | |
938 | ||
939 | static void | |
940 | ccw_device_wait4io_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
941 | { | |
942 | int ret; | |
943 | struct subchannel *sch; | |
944 | ||
945 | sch = to_subchannel(cdev->dev.parent); | |
946 | ccw_device_set_timeout(cdev, 0); | |
947 | ret = ccw_device_cancel_halt_clear(cdev); | |
948 | if (ret == -EBUSY) { | |
949 | ccw_device_set_timeout(cdev, 3*HZ); | |
950 | cdev->private->state = DEV_STATE_TIMEOUT_KILL; | |
951 | return; | |
952 | } | |
953 | if (ret == -ENODEV) { | |
954 | if (!sch->lpm) { | |
955 | PREPARE_WORK(&cdev->private->kick_work, | |
956 | ccw_device_nopath_notify, (void *)cdev); | |
957 | queue_work(ccw_device_notify_work, | |
958 | &cdev->private->kick_work); | |
959 | } else | |
960 | dev_fsm_event(cdev, DEV_EVENT_NOTOPER); | |
961 | return; | |
962 | } | |
963 | if (cdev->handler) | |
964 | cdev->handler(cdev, cdev->private->intparm, | |
965 | ERR_PTR(-ETIMEDOUT)); | |
966 | if (!sch->lpm) { | |
967 | PREPARE_WORK(&cdev->private->kick_work, | |
968 | ccw_device_nopath_notify, (void *)cdev); | |
969 | queue_work(ccw_device_notify_work, &cdev->private->kick_work); | |
970 | } else if (cdev->private->flags.doverify) | |
971 | /* Start delayed path verification. */ | |
972 | ccw_device_online_verify(cdev, 0); | |
973 | } | |
974 | ||
975 | static void | |
976 | ccw_device_wait4io_verify(struct ccw_device *cdev, enum dev_event dev_event) | |
977 | { | |
978 | /* When the I/O has terminated, we have to start verification. */ | |
979 | if (cdev->private->options.pgroup) | |
980 | cdev->private->flags.doverify = 1; | |
981 | } | |
982 | ||
983 | static void | |
984 | ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event) | |
985 | { | |
986 | struct irb *irb; | |
987 | ||
988 | switch (dev_event) { | |
989 | case DEV_EVENT_INTERRUPT: | |
990 | irb = (struct irb *) __LC_IRB; | |
991 | /* Check for unsolicited interrupt. */ | |
992 | if ((irb->scsw.stctl == | |
993 | (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) && | |
994 | (!irb->scsw.cc)) | |
995 | /* FIXME: we should restart stlck here, but this | |
996 | * is extremely unlikely ... */ | |
997 | goto out_wakeup; | |
998 | ||
999 | ccw_device_accumulate_irb(cdev, irb); | |
1000 | /* We don't care about basic sense etc. */ | |
1001 | break; | |
1002 | default: /* timeout */ | |
1003 | break; | |
1004 | } | |
1005 | out_wakeup: | |
1006 | wake_up(&cdev->private->wait_q); | |
1007 | } | |
1008 | ||
1009 | static void | |
1010 | ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event) | |
1011 | { | |
1012 | struct subchannel *sch; | |
1013 | ||
1014 | sch = to_subchannel(cdev->dev.parent); | |
1015 | if (cio_enable_subchannel(sch, sch->schib.pmcw.isc) != 0) | |
1016 | /* Couldn't enable the subchannel for i/o. Sick device. */ | |
1017 | return; | |
1018 | ||
1019 | /* After 60s the device recognition is considered to have failed. */ | |
1020 | ccw_device_set_timeout(cdev, 60*HZ); | |
1021 | ||
1022 | cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID; | |
1023 | ccw_device_sense_id_start(cdev); | |
1024 | } | |
1025 | ||
1026 | void | |
1027 | device_trigger_reprobe(struct subchannel *sch) | |
1028 | { | |
1029 | struct ccw_device *cdev; | |
1030 | ||
1031 | if (!sch->dev.driver_data) | |
1032 | return; | |
1033 | cdev = sch->dev.driver_data; | |
1034 | if (cdev->private->state != DEV_STATE_DISCONNECTED) | |
1035 | return; | |
1036 | ||
1037 | /* Update some values. */ | |
1038 | if (stsch(sch->irq, &sch->schib)) | |
1039 | return; | |
1040 | ||
1041 | /* | |
1042 | * The pim, pam, pom values may not be accurate, but they are the best | |
1043 | * we have before performing device selection :/ | |
1044 | */ | |
1045 | sch->lpm = sch->schib.pmcw.pim & | |
1046 | sch->schib.pmcw.pam & | |
1047 | sch->schib.pmcw.pom & | |
1048 | sch->opm; | |
1049 | /* Re-set some bits in the pmcw that were lost. */ | |
1050 | sch->schib.pmcw.isc = 3; | |
1051 | sch->schib.pmcw.csense = 1; | |
1052 | sch->schib.pmcw.ena = 0; | |
1053 | if ((sch->lpm & (sch->lpm - 1)) != 0) | |
1054 | sch->schib.pmcw.mp = 1; | |
1055 | sch->schib.pmcw.intparm = (__u32)(unsigned long)sch; | |
1056 | /* We should also udate ssd info, but this has to wait. */ | |
1057 | ccw_device_start_id(cdev, 0); | |
1058 | } | |
1059 | ||
1060 | static void | |
1061 | ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event) | |
1062 | { | |
1063 | struct subchannel *sch; | |
1064 | ||
1065 | sch = to_subchannel(cdev->dev.parent); | |
1066 | /* | |
1067 | * An interrupt in state offline means a previous disable was not | |
1068 | * successful. Try again. | |
1069 | */ | |
1070 | cio_disable_subchannel(sch); | |
1071 | } | |
1072 | ||
1073 | static void | |
1074 | ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event) | |
1075 | { | |
1076 | retry_set_schib(cdev); | |
1077 | cdev->private->state = DEV_STATE_ONLINE; | |
1078 | dev_fsm_event(cdev, dev_event); | |
1079 | } | |
1080 | ||
1081 | ||
1082 | static void | |
1083 | ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event) | |
1084 | { | |
1085 | ccw_device_set_timeout(cdev, 0); | |
1086 | if (dev_event == DEV_EVENT_NOTOPER) | |
1087 | cdev->private->state = DEV_STATE_NOT_OPER; | |
1088 | else | |
1089 | cdev->private->state = DEV_STATE_OFFLINE; | |
1090 | wake_up(&cdev->private->wait_q); | |
1091 | } | |
1092 | ||
1093 | static void | |
1094 | ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event) | |
1095 | { | |
1096 | int ret; | |
1097 | ||
1098 | ret = ccw_device_cancel_halt_clear(cdev); | |
1099 | switch (ret) { | |
1100 | case 0: | |
1101 | cdev->private->state = DEV_STATE_OFFLINE; | |
1102 | wake_up(&cdev->private->wait_q); | |
1103 | break; | |
1104 | case -ENODEV: | |
1105 | cdev->private->state = DEV_STATE_NOT_OPER; | |
1106 | wake_up(&cdev->private->wait_q); | |
1107 | break; | |
1108 | default: | |
1109 | ccw_device_set_timeout(cdev, HZ/10); | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * No operation action. This is used e.g. to ignore a timeout event in | |
1115 | * state offline. | |
1116 | */ | |
1117 | static void | |
1118 | ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event) | |
1119 | { | |
1120 | } | |
1121 | ||
1122 | /* | |
1123 | * Bug operation action. | |
1124 | */ | |
1125 | static void | |
1126 | ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event) | |
1127 | { | |
1128 | printk(KERN_EMERG "dev_jumptable[%i][%i] == NULL\n", | |
1129 | cdev->private->state, dev_event); | |
1130 | BUG(); | |
1131 | } | |
1132 | ||
1133 | /* | |
1134 | * device statemachine | |
1135 | */ | |
1136 | fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = { | |
1137 | [DEV_STATE_NOT_OPER] = { | |
1138 | [DEV_EVENT_NOTOPER] = ccw_device_nop, | |
1139 | [DEV_EVENT_INTERRUPT] = ccw_device_bug, | |
1140 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1141 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1142 | }, | |
1143 | [DEV_STATE_SENSE_PGID] = { | |
1144 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1145 | [DEV_EVENT_INTERRUPT] = ccw_device_sense_pgid_irq, | |
1146 | [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, | |
1147 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1148 | }, | |
1149 | [DEV_STATE_SENSE_ID] = { | |
1150 | [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper, | |
1151 | [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq, | |
1152 | [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout, | |
1153 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1154 | }, | |
1155 | [DEV_STATE_OFFLINE] = { | |
1156 | [DEV_EVENT_NOTOPER] = ccw_device_offline_notoper, | |
1157 | [DEV_EVENT_INTERRUPT] = ccw_device_offline_irq, | |
1158 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1159 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1160 | }, | |
1161 | [DEV_STATE_VERIFY] = { | |
1162 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1163 | [DEV_EVENT_INTERRUPT] = ccw_device_verify_irq, | |
1164 | [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, | |
1165 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1166 | }, | |
1167 | [DEV_STATE_ONLINE] = { | |
1168 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1169 | [DEV_EVENT_INTERRUPT] = ccw_device_irq, | |
1170 | [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout, | |
1171 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, | |
1172 | }, | |
1173 | [DEV_STATE_W4SENSE] = { | |
1174 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1175 | [DEV_EVENT_INTERRUPT] = ccw_device_w4sense, | |
1176 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1177 | [DEV_EVENT_VERIFY] = ccw_device_online_verify, | |
1178 | }, | |
1179 | [DEV_STATE_DISBAND_PGID] = { | |
1180 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1181 | [DEV_EVENT_INTERRUPT] = ccw_device_disband_irq, | |
1182 | [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout, | |
1183 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1184 | }, | |
1185 | [DEV_STATE_BOXED] = { | |
1186 | [DEV_EVENT_NOTOPER] = ccw_device_offline_notoper, | |
1187 | [DEV_EVENT_INTERRUPT] = ccw_device_stlck_done, | |
1188 | [DEV_EVENT_TIMEOUT] = ccw_device_stlck_done, | |
1189 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1190 | }, | |
1191 | /* states to wait for i/o completion before doing something */ | |
1192 | [DEV_STATE_CLEAR_VERIFY] = { | |
1193 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1194 | [DEV_EVENT_INTERRUPT] = ccw_device_clear_verify, | |
1195 | [DEV_EVENT_TIMEOUT] = ccw_device_nop, | |
1196 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1197 | }, | |
1198 | [DEV_STATE_TIMEOUT_KILL] = { | |
1199 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1200 | [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq, | |
1201 | [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout, | |
1202 | [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME | |
1203 | }, | |
1204 | [DEV_STATE_WAIT4IO] = { | |
1205 | [DEV_EVENT_NOTOPER] = ccw_device_online_notoper, | |
1206 | [DEV_EVENT_INTERRUPT] = ccw_device_wait4io_irq, | |
1207 | [DEV_EVENT_TIMEOUT] = ccw_device_wait4io_timeout, | |
1208 | [DEV_EVENT_VERIFY] = ccw_device_wait4io_verify, | |
1209 | }, | |
1210 | [DEV_STATE_QUIESCE] = { | |
1211 | [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done, | |
1212 | [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done, | |
1213 | [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout, | |
1214 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1215 | }, | |
1216 | /* special states for devices gone not operational */ | |
1217 | [DEV_STATE_DISCONNECTED] = { | |
1218 | [DEV_EVENT_NOTOPER] = ccw_device_nop, | |
1219 | [DEV_EVENT_INTERRUPT] = ccw_device_start_id, | |
1220 | [DEV_EVENT_TIMEOUT] = ccw_device_bug, | |
1221 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1222 | }, | |
1223 | [DEV_STATE_DISCONNECTED_SENSE_ID] = { | |
1224 | [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper, | |
1225 | [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq, | |
1226 | [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout, | |
1227 | [DEV_EVENT_VERIFY] = ccw_device_nop, | |
1228 | }, | |
1229 | [DEV_STATE_CMFCHANGE] = { | |
1230 | [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate, | |
1231 | [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate, | |
1232 | [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate, | |
1233 | [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate, | |
1234 | }, | |
1235 | }; | |
1236 | ||
1237 | /* | |
1238 | * io_subchannel_irq is called for "real" interrupts or for status | |
1239 | * pending conditions on msch. | |
1240 | */ | |
1241 | void | |
1242 | io_subchannel_irq (struct device *pdev) | |
1243 | { | |
1244 | struct ccw_device *cdev; | |
1245 | ||
1246 | cdev = to_subchannel(pdev)->dev.driver_data; | |
1247 | ||
1248 | CIO_TRACE_EVENT (3, "IRQ"); | |
1249 | CIO_TRACE_EVENT (3, pdev->bus_id); | |
1250 | if (cdev) | |
1251 | dev_fsm_event(cdev, DEV_EVENT_INTERRUPT); | |
1252 | } | |
1253 | ||
1254 | EXPORT_SYMBOL_GPL(ccw_device_set_timeout); |