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[S390] cio: fix ineffective verify event
[net-next-2.6.git] / drivers / s390 / cio / device_fsm.c
CommitLineData
1da177e4
LT		 1/*
2 * drivers/s390/cio/device_fsm.c
3 * finite state machine for device handling
4 *
c820de39 5 * Copyright IBM Corp. 2002,2008
4ce3b30c 6 * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
1da177e4
LT		 7 * Martin Schwidefsky (schwidefsky@de.ibm.com)
8 */
9
10#include <linux/module.h>
1da177e4 11#include <linux/init.h>
4e57b681
TS		 12#include <linux/jiffies.h>
13#include <linux/string.h>
1da177e4
LT		 14
15#include <asm/ccwdev.h>
4c24da79 16#include <asm/cio.h>
e5854a58 17#include <asm/chpid.h>
1da177e4
LT		 18
19#include "cio.h"
20#include "cio_debug.h"
21#include "css.h"
22#include "device.h"
23#include "chsc.h"
24#include "ioasm.h"
e6b6e10a 25#include "chp.h"
1da177e4 26
14ff56bb
SO		 27static int timeout_log_enabled;
28
14ff56bb
SO		 29static int __init ccw_timeout_log_setup(char *unused)
30{
31 timeout_log_enabled = 1;
32 return 1;
33}
34
35__setup("ccw_timeout_log", ccw_timeout_log_setup);
36
37static void ccw_timeout_log(struct ccw_device *cdev)
38{
39 struct schib schib;
40 struct subchannel *sch;
cd6b4f27 41 struct io_subchannel_private *private;
83262d63 42 union orb *orb;
14ff56bb
SO		 43 int cc;
44
45 sch = to_subchannel(cdev->dev.parent);
cd6b4f27 46 private = to_io_private(sch);
83262d63 47 orb = &private->orb;
14ff56bb
SO		 48 cc = stsch(sch->schid, &schib);
49
50 printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, "
51 "device information:\n", get_clock());
52 printk(KERN_WARNING "cio: orb:\n");
53 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
83262d63 54 orb, sizeof(*orb), 0);
2a0217d5
KS		 55 printk(KERN_WARNING "cio: ccw device bus id: %s\n",
56 dev_name(&cdev->dev));
57 printk(KERN_WARNING "cio: subchannel bus id: %s\n",
58 dev_name(&sch->dev));
14ff56bb
SO		 59 printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, "
60 "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm);
61
83262d63
PO		 62 if (orb->tm.b) {
63 printk(KERN_WARNING "cio: orb indicates transport mode\n");
64 printk(KERN_WARNING "cio: last tcw:\n");
65 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
66 (void *)(addr_t)orb->tm.tcw,
67 sizeof(struct tcw), 0);
68 } else {
69 printk(KERN_WARNING "cio: orb indicates command mode\n");
70 if ((void *)(addr_t)orb->cmd.cpa == &private->sense_ccw ||
71 (void *)(addr_t)orb->cmd.cpa == cdev->private->iccws)
72 printk(KERN_WARNING "cio: last channel program "
73 "(intern):\n");
74 else
75 printk(KERN_WARNING "cio: last channel program:\n");
76
77 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
78 (void *)(addr_t)orb->cmd.cpa,
79 sizeof(struct ccw1), 0);
80 }
14ff56bb
SO		 81 printk(KERN_WARNING "cio: ccw device state: %d\n",
82 cdev->private->state);
83 printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc);
84 printk(KERN_WARNING "cio: schib:\n");
85 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
86 &schib, sizeof(schib), 0);
87 printk(KERN_WARNING "cio: ccw device flags:\n");
88 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
89 &cdev->private->flags, sizeof(cdev->private->flags), 0);
90}
91
1da177e4
LT		 92/*
93 * Timeout function. It just triggers a DEV_EVENT_TIMEOUT.
94 */
95static void
96ccw_device_timeout(unsigned long data)
97{
98 struct ccw_device *cdev;
99
100 cdev = (struct ccw_device *) data;
101 spin_lock_irq(cdev->ccwlock);
14ff56bb
SO		 102 if (timeout_log_enabled)
103 ccw_timeout_log(cdev);
1da177e4
LT		 104 dev_fsm_event(cdev, DEV_EVENT_TIMEOUT);
105 spin_unlock_irq(cdev->ccwlock);
106}
107
108/*
109 * Set timeout
110 */
111void
112ccw_device_set_timeout(struct ccw_device *cdev, int expires)
113{
114 if (expires == 0) {
115 del_timer(&cdev->private->timer);
116 return;
117 }
118 if (timer_pending(&cdev->private->timer)) {
119 if (mod_timer(&cdev->private->timer, jiffies + expires))
120 return;
121 }
122 cdev->private->timer.function = ccw_device_timeout;
123 cdev->private->timer.data = (unsigned long) cdev;
124 cdev->private->timer.expires = jiffies + expires;
125 add_timer(&cdev->private->timer);
126}
127
1da177e4
LT		 128/*
129 * Cancel running i/o. This is called repeatedly since halt/clear are
130 * asynchronous operations. We do one try with cio_cancel, two tries
131 * with cio_halt, 255 tries with cio_clear. If everythings fails panic.
132 * Returns 0 if device now idle, -ENODEV for device not operational and
133 * -EBUSY if an interrupt is expected (either from halt/clear or from a
134 * status pending).
135 */
136int
137ccw_device_cancel_halt_clear(struct ccw_device *cdev)
138{
139 struct subchannel *sch;
140 int ret;
141
142 sch = to_subchannel(cdev->dev.parent);
cdb912a4 143 if (cio_update_schib(sch))
1da177e4 144 return -ENODEV;
2470b648
CH		 145 if (!sch->schib.pmcw.ena)
146 /* Not operational -> done. */
1da177e4
LT		 147 return 0;
148 /* Stage 1: cancel io. */
23d805b6
PO		 149 if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_HALT_PEND) &&
150 !(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
83262d63
PO		 151 if (!scsw_is_tm(&sch->schib.scsw)) {
152 ret = cio_cancel(sch);
153 if (ret != -EINVAL)
154 return ret;
155 }
156 /* cancel io unsuccessful or not applicable (transport mode).
157 * Continue with asynchronous instructions. */
1da177e4
LT		 158 cdev->private->iretry = 3; /* 3 halt retries. */
159 }
23d805b6 160 if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
1da177e4
LT		 161 /* Stage 2: halt io. */
162 if (cdev->private->iretry) {
163 cdev->private->iretry--;
164 ret = cio_halt(sch);
ba4ba8a6
PO		 165 if (ret != -EBUSY)
166 return (ret == 0) ? -EBUSY : ret;
1da177e4
LT		 167 }
168 /* halt io unsuccessful. */
169 cdev->private->iretry = 255; /* 255 clear retries. */
170 }
171 /* Stage 3: clear io. */
172 if (cdev->private->iretry) {
173 cdev->private->iretry--;
174 ret = cio_clear (sch);
175 return (ret == 0) ? -EBUSY : ret;
176 }
177 panic("Can't stop i/o on subchannel.\n");
178}
179
823d494a 180void ccw_device_update_sense_data(struct ccw_device *cdev)
1da177e4 181{
823d494a
SO		 182 memset(&cdev->id, 0, sizeof(cdev->id));
183 cdev->id.cu_type = cdev->private->senseid.cu_type;
184 cdev->id.cu_model = cdev->private->senseid.cu_model;
185 cdev->id.dev_type = cdev->private->senseid.dev_type;
186 cdev->id.dev_model = cdev->private->senseid.dev_model;
187}
1da177e4 188
823d494a
SO		 189int ccw_device_test_sense_data(struct ccw_device *cdev)
190{
191 return cdev->id.cu_type == cdev->private->senseid.cu_type &&
192 cdev->id.cu_model == cdev->private->senseid.cu_model &&
193 cdev->id.dev_type == cdev->private->senseid.dev_type &&
194 cdev->id.dev_model == cdev->private->senseid.dev_model;
1da177e4
LT		 195}
196
197/*
198 * The machine won't give us any notification by machine check if a chpid has
199 * been varied online on the SE so we have to find out by magic (i. e. driving
200 * the channel subsystem to device selection and updating our path masks).
201 */
4d284cac 202static void
1da177e4
LT		 203__recover_lost_chpids(struct subchannel *sch, int old_lpm)
204{
205 int mask, i;
f86635fa 206 struct chp_id chpid;
1da177e4 207
f86635fa 208 chp_id_init(&chpid);
1da177e4
LT		 209 for (i = 0; i<8; i++) {
210 mask = 0x80 >> i;
211 if (!(sch->lpm & mask))
212 continue;
213 if (old_lpm & mask)
214 continue;
f86635fa 215 chpid.id = sch->schib.pmcw.chpid[i];
83b3370c
PO		 216 if (!chp_is_registered(chpid))
217 css_schedule_eval_all();
1da177e4
LT		 218 }
219}
220
221/*
222 * Stop device recognition.
223 */
224static void
225ccw_device_recog_done(struct ccw_device *cdev, int state)
226{
227 struct subchannel *sch;
823d494a 228 int old_lpm;
1da177e4
LT		 229
230 sch = to_subchannel(cdev->dev.parent);
231
232 ccw_device_set_timeout(cdev, 0);
233 cio_disable_subchannel(sch);
234 /*
235 * Now that we tried recognition, we have performed device selection
236 * through ssch() and the path information is up to date.
237 */
238 old_lpm = sch->lpm;
cdb912a4 239
4ffa9234 240 /* Check since device may again have become not operational. */
cdb912a4 241 if (cio_update_schib(sch))
4ffa9234 242 state = DEV_STATE_NOT_OPER;
cdb912a4
SO		 243 else
244 sch->lpm = sch->schib.pmcw.pam & sch->opm;
245
1da177e4
LT		 246 if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID)
247 /* Force reprobe on all chpids. */
248 old_lpm = 0;
249 if (sch->lpm != old_lpm)
250 __recover_lost_chpids(sch, old_lpm);
47593bfa
SO		 251 if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID &&
252 (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) {
253 cdev->private->flags.recog_done = 1;
254 cdev->private->state = DEV_STATE_DISCONNECTED;
255 wake_up(&cdev->private->wait_q);
256 return;
1da177e4 257 }
823d494a
SO		 258 if (cdev->private->flags.resuming) {
259 cdev->private->state = state;
260 cdev->private->flags.recog_done = 1;
261 wake_up(&cdev->private->wait_q);
262 return;
263 }
1da177e4
LT		 264 switch (state) {
265 case DEV_STATE_NOT_OPER:
139b83dd
ME		 266 CIO_MSG_EVENT(2, "SenseID : unknown device %04x on "
267 "subchannel 0.%x.%04x\n",
268 cdev->private->dev_id.devno,
269 sch->schid.ssid, sch->schid.sch_no);
1da177e4
LT		 270 break;
271 case DEV_STATE_OFFLINE:
823d494a
SO		 272 if (!cdev->online) {
273 ccw_device_update_sense_data(cdev);
274 /* Issue device info message. */
275 CIO_MSG_EVENT(4, "SenseID : device 0.%x.%04x reports: "
276 "CU Type/Mod = %04X/%02X, Dev Type/Mod "
277 "= %04X/%02X\n",
278 cdev->private->dev_id.ssid,
279 cdev->private->dev_id.devno,
280 cdev->id.cu_type, cdev->id.cu_model,
281 cdev->id.dev_type, cdev->id.dev_model);
282 break;
1da177e4 283 }
823d494a
SO		 284 cdev->private->state = DEV_STATE_OFFLINE;
285 cdev->private->flags.recog_done = 1;
286 if (ccw_device_test_sense_data(cdev)) {
287 cdev->private->flags.donotify = 1;
288 ccw_device_online(cdev);
289 wake_up(&cdev->private->wait_q);
290 } else {
291 ccw_device_update_sense_data(cdev);
292 PREPARE_WORK(&cdev->private->kick_work,
293 ccw_device_do_unbind_bind);
294 queue_work(ccw_device_work, &cdev->private->kick_work);
1da177e4 295 }
823d494a 296 return;
1da177e4 297 case DEV_STATE_BOXED:
139b83dd
ME		 298 CIO_MSG_EVENT(0, "SenseID : boxed device %04x on "
299 " subchannel 0.%x.%04x\n",
300 cdev->private->dev_id.devno,
301 sch->schid.ssid, sch->schid.sch_no);
47593bfa
SO		 302 if (cdev->id.cu_type != 0) { /* device was recognized before */
303 cdev->private->flags.recog_done = 1;
304 cdev->private->state = DEV_STATE_BOXED;
305 wake_up(&cdev->private->wait_q);
306 return;
307 }
1da177e4
LT		 308 break;
309 }
310 cdev->private->state = state;
311 io_subchannel_recog_done(cdev);
156013ff 312 wake_up(&cdev->private->wait_q);
1da177e4
LT		 313}
314
315/*
316 * Function called from device_id.c after sense id has completed.
317 */
318void
319ccw_device_sense_id_done(struct ccw_device *cdev, int err)
320{
321 switch (err) {
322 case 0:
323 ccw_device_recog_done(cdev, DEV_STATE_OFFLINE);
324 break;
325 case -ETIME: /* Sense id stopped by timeout. */
326 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
327 break;
328 default:
329 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
330 break;
331 }
332}
333
c820de39
CH		 334int ccw_device_notify(struct ccw_device *cdev, int event)
335{
336 if (!cdev->drv)
337 return 0;
338 if (!cdev->online)
339 return 0;
91c36919
PO		 340 CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n",
341 cdev->private->dev_id.ssid, cdev->private->dev_id.devno,
342 event);
c820de39
CH		 343 return cdev->drv->notify ? cdev->drv->notify(cdev, event) : 0;
344}
345
91c36919 346static void cmf_reenable_delayed(struct work_struct *work)
1da177e4 347{
c1637532 348 struct ccw_device_private *priv;
1da177e4 349 struct ccw_device *cdev;
1da177e4 350
c1637532
MS		 351 priv = container_of(work, struct ccw_device_private, kick_work);
352 cdev = priv->cdev;
91c36919
PO		 353 cmf_reenable(cdev);
354}
355
356static void ccw_device_oper_notify(struct ccw_device *cdev)
357{
358 if (ccw_device_notify(cdev, CIO_OPER)) {
94bb0633 359 /* Reenable channel measurements, if needed. */
91c36919
PO		 360 PREPARE_WORK(&cdev->private->kick_work, cmf_reenable_delayed);
361 queue_work(ccw_device_work, &cdev->private->kick_work);
362 return;
363 }
364 /* Driver doesn't want device back. */
365 ccw_device_set_notoper(cdev);
eb32ae8d 366 PREPARE_WORK(&cdev->private->kick_work, ccw_device_do_unbind_bind);
91c36919 367 queue_work(ccw_device_work, &cdev->private->kick_work);
1da177e4
LT		 368}
369
370/*
371 * Finished with online/offline processing.
372 */
373static void
374ccw_device_done(struct ccw_device *cdev, int state)
375{
376 struct subchannel *sch;
377
378 sch = to_subchannel(cdev->dev.parent);
379
f1ee3281
CH		 380 ccw_device_set_timeout(cdev, 0);
381
1da177e4
LT		 382 if (state != DEV_STATE_ONLINE)
383 cio_disable_subchannel(sch);
384
385 /* Reset device status. */
386 memset(&cdev->private->irb, 0, sizeof(struct irb));
387
388 cdev->private->state = state;
389
47593bfa 390 if (state == DEV_STATE_BOXED) {
139b83dd
ME		 391 CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
392 cdev->private->dev_id.devno, sch->schid.sch_no);
47593bfa
SO		 393 if (cdev->online && !ccw_device_notify(cdev, CIO_BOXED))
394 ccw_device_schedule_sch_unregister(cdev);
395 cdev->private->flags.donotify = 0;
396 }
1da177e4
LT		 397
398 if (cdev->private->flags.donotify) {
399 cdev->private->flags.donotify = 0;
91c36919 400 ccw_device_oper_notify(cdev);
1da177e4
LT		 401 }
402 wake_up(&cdev->private->wait_q);
1da177e4
LT		 403}
404
4d284cac 405static int cmp_pgid(struct pgid *p1, struct pgid *p2)
7e560814
CH		 406{
407 char *c1;
408 char *c2;
409
410 c1 = (char *)p1;
411 c2 = (char *)p2;
412
413 return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
414}
415
416static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
417{
418 int i;
419 int last;
420
421 last = 0;
422 for (i = 0; i < 8; i++) {
423 if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
424 /* No PGID yet */
425 continue;
426 if (cdev->private->pgid[last].inf.ps.state1 ==
427 SNID_STATE1_RESET) {
428 /* First non-zero PGID */
429 last = i;
430 continue;
431 }
432 if (cmp_pgid(&cdev->private->pgid[i],
433 &cdev->private->pgid[last]) == 0)
434 /* Non-conflicting PGIDs */
435 continue;
436
437 /* PGID mismatch, can't pathgroup. */
438 CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
439 "0.%x.%04x, can't pathgroup\n",
78964268
CH		 440 cdev->private->dev_id.ssid,
441 cdev->private->dev_id.devno);
7e560814
CH		 442 cdev->private->options.pgroup = 0;
443 return;
444 }
445 if (cdev->private->pgid[last].inf.ps.state1 ==
446 SNID_STATE1_RESET)
447 /* No previous pgid found */
7c9f4e3a
CH		 448 memcpy(&cdev->private->pgid[0],
449 &channel_subsystems[0]->global_pgid,
7e560814
CH		 450 sizeof(struct pgid));
451 else
452 /* Use existing pgid */
453 memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
454 sizeof(struct pgid));
455}
456
1da177e4
LT		 457/*
458 * Function called from device_pgid.c after sense path ground has completed.
459 */
460void
461ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
462{
463 struct subchannel *sch;
464
465 sch = to_subchannel(cdev->dev.parent);
466 switch (err) {
7e560814
CH		 467 case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
468 cdev->private->options.pgroup = 0;
469 break;
470 case 0: /* success */
471 case -EACCES: /* partial success, some paths not operational */
472 /* Check if all pgids are equal or 0. */
473 __ccw_device_get_common_pgid(cdev);
1da177e4
LT		 474 break;
475 case -ETIME: /* Sense path group id stopped by timeout. */
476 case -EUSERS: /* device is reserved for someone else. */
477 ccw_device_done(cdev, DEV_STATE_BOXED);
7e560814 478 return;
1da177e4
LT		 479 default:
480 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
7e560814 481 return;
1da177e4 482 }
7e560814 483 /* Start Path Group verification. */
7e560814 484 cdev->private->state = DEV_STATE_VERIFY;
28bdc6f6 485 cdev->private->flags.doverify = 0;
7e560814 486 ccw_device_verify_start(cdev);
1da177e4
LT		 487}
488
489/*
490 * Start device recognition.
491 */
492int
493ccw_device_recognition(struct ccw_device *cdev)
494{
495 struct subchannel *sch;
496 int ret;
497
1da177e4 498 sch = to_subchannel(cdev->dev.parent);
edf22096 499 ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
1da177e4
LT		 500 if (ret != 0)
501 /* Couldn't enable the subchannel for i/o. Sick device. */
502 return ret;
503
504 /* After 60s the device recognition is considered to have failed. */
505 ccw_device_set_timeout(cdev, 60*HZ);
506
507 /*
508 * We used to start here with a sense pgid to find out whether a device
509 * is locked by someone else. Unfortunately, the sense pgid command
510 * code has other meanings on devices predating the path grouping
511 * algorithm, so we start with sense id and box the device after an
512 * timeout (or if sense pgid during path verification detects the device
513 * is locked, as may happen on newer devices).
514 */
515 cdev->private->flags.recog_done = 0;
516 cdev->private->state = DEV_STATE_SENSE_ID;
517 ccw_device_sense_id_start(cdev);
518 return 0;
519}
520
521/*
522 * Handle timeout in device recognition.
523 */
524static void
525ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
526{
527 int ret;
528
529 ret = ccw_device_cancel_halt_clear(cdev);
530 switch (ret) {
531 case 0:
532 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
533 break;
534 case -ENODEV:
535 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
536 break;
537 default:
538 ccw_device_set_timeout(cdev, 3*HZ);
539 }
540}
541
542
1da177e4
LT		 543void
544ccw_device_verify_done(struct ccw_device *cdev, int err)
545{
28bdc6f6
PO		 546 struct subchannel *sch;
547
548 sch = to_subchannel(cdev->dev.parent);
549 /* Update schib - pom may have changed. */
cdb912a4
SO		 550 if (cio_update_schib(sch)) {
551 cdev->private->flags.donotify = 0;
552 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
553 return;
554 }
28bdc6f6
PO		 555 /* Update lpm with verified path mask. */
556 sch->lpm = sch->vpm;
557 /* Repeat path verification? */
558 if (cdev->private->flags.doverify) {
559 cdev->private->flags.doverify = 0;
560 ccw_device_verify_start(cdev);
561 return;
562 }
1da177e4
LT		 563 switch (err) {
564 case -EOPNOTSUPP: /* path grouping not supported, just set online. */
565 cdev->private->options.pgroup = 0;
566 case 0:
567 ccw_device_done(cdev, DEV_STATE_ONLINE);
568 /* Deliver fake irb to device driver, if needed. */
569 if (cdev->private->flags.fake_irb) {
570 memset(&cdev->private->irb, 0, sizeof(struct irb));
23d805b6
PO		 571 cdev->private->irb.scsw.cmd.cc = 1;
572 cdev->private->irb.scsw.cmd.fctl = SCSW_FCTL_START_FUNC;
573 cdev->private->irb.scsw.cmd.actl = SCSW_ACTL_START_PEND;
574 cdev->private->irb.scsw.cmd.stctl =
575 SCSW_STCTL_STATUS_PEND;
1da177e4
LT		 576 cdev->private->flags.fake_irb = 0;
577 if (cdev->handler)
578 cdev->handler(cdev, cdev->private->intparm,
579 &cdev->private->irb);
580 memset(&cdev->private->irb, 0, sizeof(struct irb));
581 }
582 break;
583 case -ETIME:
8b42f5c2
PO		 584 /* Reset oper notify indication after verify error. */
585 cdev->private->flags.donotify = 0;
1da177e4
LT		 586 ccw_device_done(cdev, DEV_STATE_BOXED);
587 break;
588 default:
8b42f5c2
PO		 589 /* Reset oper notify indication after verify error. */
590 cdev->private->flags.donotify = 0;
46258ab5
CH		 591 if (cdev->online) {
592 ccw_device_set_timeout(cdev, 0);
3f4cf6e7 593 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
46258ab5 594 } else
ee04bbcc 595 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
1da177e4
LT		 596 break;
597 }
598}
599
600/*
601 * Get device online.
602 */
603int
604ccw_device_online(struct ccw_device *cdev)
605{
606 struct subchannel *sch;
607 int ret;
608
609 if ((cdev->private->state != DEV_STATE_OFFLINE) &&
610 (cdev->private->state != DEV_STATE_BOXED))
611 return -EINVAL;
612 sch = to_subchannel(cdev->dev.parent);
edf22096 613 ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
1da177e4
LT		 614 if (ret != 0) {
615 /* Couldn't enable the subchannel for i/o. Sick device. */
616 if (ret == -ENODEV)
617 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
618 return ret;
619 }
620 /* Do we want to do path grouping? */
621 if (!cdev->private->options.pgroup) {
7e560814
CH		 622 /* Start initial path verification. */
623 cdev->private->state = DEV_STATE_VERIFY;
28bdc6f6 624 cdev->private->flags.doverify = 0;
7e560814 625 ccw_device_verify_start(cdev);
1da177e4
LT		 626 return 0;
627 }
628 /* Do a SensePGID first. */
629 cdev->private->state = DEV_STATE_SENSE_PGID;
630 ccw_device_sense_pgid_start(cdev);
631 return 0;
632}
633
634void
635ccw_device_disband_done(struct ccw_device *cdev, int err)
636{
637 switch (err) {
638 case 0:
639 ccw_device_done(cdev, DEV_STATE_OFFLINE);
640 break;
641 case -ETIME:
642 ccw_device_done(cdev, DEV_STATE_BOXED);
643 break;
644 default:
3ecb0a5a 645 cdev->private->flags.donotify = 0;
3f4cf6e7 646 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
1da177e4
LT		 647 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
648 break;
649 }
650}
651
652/*
653 * Shutdown device.
654 */
655int
656ccw_device_offline(struct ccw_device *cdev)
657{
658 struct subchannel *sch;
659
b301ea8c
PO		 660 /* Allow ccw_device_offline while disconnected. */
661 if (cdev->private->state == DEV_STATE_DISCONNECTED ||
662 cdev->private->state == DEV_STATE_NOT_OPER) {
663 cdev->private->flags.donotify = 0;
664 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
665 return 0;
666 }
d7b5a4c9
CH		 667 if (ccw_device_is_orphan(cdev)) {
668 ccw_device_done(cdev, DEV_STATE_OFFLINE);
669 return 0;
670 }
1da177e4 671 sch = to_subchannel(cdev->dev.parent);
cdb912a4 672 if (cio_update_schib(sch))
1da177e4 673 return -ENODEV;
23d805b6 674 if (scsw_actl(&sch->schib.scsw) != 0)
1da177e4 675 return -EBUSY;
23d805b6
PO		 676 if (cdev->private->state != DEV_STATE_ONLINE)
677 return -EINVAL;
1da177e4
LT		 678 /* Are we doing path grouping? */
679 if (!cdev->private->options.pgroup) {
680 /* No, set state offline immediately. */
681 ccw_device_done(cdev, DEV_STATE_OFFLINE);
682 return 0;
683 }
684 /* Start Set Path Group commands. */
685 cdev->private->state = DEV_STATE_DISBAND_PGID;
686 ccw_device_disband_start(cdev);
687 return 0;
688}
689
690/*
691 * Handle timeout in device online/offline process.
692 */
693static void
694ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
695{
696 int ret;
697
698 ret = ccw_device_cancel_halt_clear(cdev);
699 switch (ret) {
700 case 0:
701 ccw_device_done(cdev, DEV_STATE_BOXED);
702 break;
703 case -ENODEV:
704 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
705 break;
706 default:
707 ccw_device_set_timeout(cdev, 3*HZ);
708 }
709}
710
711/*
712 * Handle not oper event in device recognition.
713 */
714static void
715ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
716{
717 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
718}
719
720/*
3f4cf6e7 721 * Handle not operational event in non-special state.
1da177e4 722 */
3f4cf6e7
CH		 723static void ccw_device_generic_notoper(struct ccw_device *cdev,
724 enum dev_event dev_event)
1da177e4
LT		 725{
726 struct subchannel *sch;
727
c08f294a 728 ccw_device_set_notoper(cdev);
1da177e4 729 sch = to_subchannel(cdev->dev.parent);
3f4cf6e7 730 css_schedule_eval(sch->schid);
1da177e4
LT		 731}
732
1f1148c8
PO		 733/*
734 * Handle path verification event in offline state.
735 */
736static void ccw_device_offline_verify(struct ccw_device *cdev,
737 enum dev_event dev_event)
738{
739 struct subchannel *sch = to_subchannel(cdev->dev.parent);
740
741 css_schedule_eval(sch->schid);
742}
743
1da177e4
LT		 744/*
745 * Handle path verification event.
746 */
747static void
748ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
749{
750 struct subchannel *sch;
751
1da177e4
LT		 752 if (cdev->private->state == DEV_STATE_W4SENSE) {
753 cdev->private->flags.doverify = 1;
754 return;
755 }
756 sch = to_subchannel(cdev->dev.parent);
757 /*
758 * Since we might not just be coming from an interrupt from the
759 * subchannel we have to update the schib.
760 */
cdb912a4
SO		 761 if (cio_update_schib(sch)) {
762 ccw_device_verify_done(cdev, -ENODEV);
763 return;
764 }
1da177e4 765
23d805b6
PO		 766 if (scsw_actl(&sch->schib.scsw) != 0 ||
767 (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
768 (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) {
1da177e4
LT		 769 /*
770 * No final status yet or final status not yet delivered
771 * to the device driver. Can't do path verfication now,
772 * delay until final status was delivered.
773 */
774 cdev->private->flags.doverify = 1;
775 return;
776 }
777 /* Device is idle, we can do the path verification. */
778 cdev->private->state = DEV_STATE_VERIFY;
28bdc6f6 779 cdev->private->flags.doverify = 0;
1da177e4
LT		 780 ccw_device_verify_start(cdev);
781}
782
783/*
784 * Got an interrupt for a normal io (state online).
785 */
786static void
787ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
788{
789 struct irb *irb;
83262d63 790 int is_cmd;
1da177e4
LT		 791
792 irb = (struct irb *) __LC_IRB;
83262d63 793 is_cmd = !scsw_is_tm(&irb->scsw);
1da177e4 794 /* Check for unsolicited interrupt. */
23d805b6 795 if (!scsw_is_solicited(&irb->scsw)) {
83262d63 796 if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
1da177e4
LT		 797 !irb->esw.esw0.erw.cons) {
798 /* Unit check but no sense data. Need basic sense. */
799 if (ccw_device_do_sense(cdev, irb) != 0)
800 goto call_handler_unsol;
e0ec5749 801 memcpy(&cdev->private->irb, irb, sizeof(struct irb));
1da177e4
LT		 802 cdev->private->state = DEV_STATE_W4SENSE;
803 cdev->private->intparm = 0;
804 return;
805 }
806call_handler_unsol:
807 if (cdev->handler)
808 cdev->handler (cdev, 0, irb);
18374d37
CH		 809 if (cdev->private->flags.doverify)
810 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 811 return;
812 }
813 /* Accumulate status and find out if a basic sense is needed. */
814 ccw_device_accumulate_irb(cdev, irb);
83262d63 815 if (is_cmd && cdev->private->flags.dosense) {
1da177e4
LT		 816 if (ccw_device_do_sense(cdev, irb) == 0) {
817 cdev->private->state = DEV_STATE_W4SENSE;
818 }
819 return;
820 }
821 /* Call the handler. */
822 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
823 /* Start delayed path verification. */
824 ccw_device_online_verify(cdev, 0);
825}
826
827/*
828 * Got an timeout in online state.
829 */
830static void
831ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
832{
833 int ret;
834
835 ccw_device_set_timeout(cdev, 0);
836 ret = ccw_device_cancel_halt_clear(cdev);
837 if (ret == -EBUSY) {
838 ccw_device_set_timeout(cdev, 3*HZ);
839 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
840 return;
841 }
3f4cf6e7
CH		 842 if (ret == -ENODEV)
843 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
844 else if (cdev->handler)
1da177e4
LT		 845 cdev->handler(cdev, cdev->private->intparm,
846 ERR_PTR(-ETIMEDOUT));
847}
848
849/*
850 * Got an interrupt for a basic sense.
851 */
2b67fc46 852static void
1da177e4
LT		 853ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
854{
855 struct irb *irb;
856
857 irb = (struct irb *) __LC_IRB;
858 /* Check for unsolicited interrupt. */
23d805b6
PO		 859 if (scsw_stctl(&irb->scsw) ==
860 (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
861 if (scsw_cc(&irb->scsw) == 1)
1da177e4
LT		 862 /* Basic sense hasn't started. Try again. */
863 ccw_device_do_sense(cdev, irb);
864 else {
139b83dd 865 CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited "
e556bbbd
CH		 866 "interrupt during w4sense...\n",
867 cdev->private->dev_id.ssid,
868 cdev->private->dev_id.devno);
1da177e4
LT		 869 if (cdev->handler)
870 cdev->handler (cdev, 0, irb);
871 }
872 return;
873 }
3ba1998e
CH		 874 /*
875 * Check if a halt or clear has been issued in the meanwhile. If yes,
876 * only deliver the halt/clear interrupt to the device driver as if it
877 * had killed the original request.
878 */
23d805b6
PO		 879 if (scsw_fctl(&irb->scsw) &
880 (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
d23861ff
CH		 881 /* Retry Basic Sense if requested. */
882 if (cdev->private->flags.intretry) {
883 cdev->private->flags.intretry = 0;
884 ccw_device_do_sense(cdev, irb);
885 return;
886 }
3ba1998e
CH		 887 cdev->private->flags.dosense = 0;
888 memset(&cdev->private->irb, 0, sizeof(struct irb));
889 ccw_device_accumulate_irb(cdev, irb);
890 goto call_handler;
891 }
1da177e4
LT		 892 /* Add basic sense info to irb. */
893 ccw_device_accumulate_basic_sense(cdev, irb);
894 if (cdev->private->flags.dosense) {
895 /* Another basic sense is needed. */
896 ccw_device_do_sense(cdev, irb);
897 return;
898 }
3ba1998e 899call_handler:
1da177e4
LT		 900 cdev->private->state = DEV_STATE_ONLINE;
901 /* Call the handler. */
902 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
903 /* Start delayed path verification. */
904 ccw_device_online_verify(cdev, 0);
905}
906
907static void
908ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
909{
910 struct irb *irb;
911
912 irb = (struct irb *) __LC_IRB;
913 /* Accumulate status. We don't do basic sense. */
914 ccw_device_accumulate_irb(cdev, irb);
b4f7b1ee
CH		 915 /* Remember to clear irb to avoid residuals. */
916 memset(&cdev->private->irb, 0, sizeof(struct irb));
1da177e4
LT		 917 /* Try to start delayed device verification. */
918 ccw_device_online_verify(cdev, 0);
919 /* Note: Don't call handler for cio initiated clear! */
920}
921
922static void
923ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
924{
925 struct subchannel *sch;
926
927 sch = to_subchannel(cdev->dev.parent);
928 ccw_device_set_timeout(cdev, 0);
7c8427c3
CH		 929 /* Start delayed path verification. */
930 ccw_device_online_verify(cdev, 0);
1da177e4 931 /* OK, i/o is dead now. Call interrupt handler. */
1da177e4
LT		 932 if (cdev->handler)
933 cdev->handler(cdev, cdev->private->intparm,
e7769b48 934 ERR_PTR(-EIO));
1da177e4
LT		 935}
936
937static void
938ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
939{
940 int ret;
941
942 ret = ccw_device_cancel_halt_clear(cdev);
943 if (ret == -EBUSY) {
944 ccw_device_set_timeout(cdev, 3*HZ);
945 return;
946 }
7c8427c3
CH		 947 /* Start delayed path verification. */
948 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 949 if (cdev->handler)
950 cdev->handler(cdev, cdev->private->intparm,
e7769b48 951 ERR_PTR(-EIO));
1da177e4
LT		 952}
953
c820de39 954void ccw_device_kill_io(struct ccw_device *cdev)
1da177e4
LT		 955{
956 int ret;
1da177e4 957
1da177e4
LT		 958 ret = ccw_device_cancel_halt_clear(cdev);
959 if (ret == -EBUSY) {
960 ccw_device_set_timeout(cdev, 3*HZ);
961 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
962 return;
963 }
7c8427c3
CH		 964 /* Start delayed path verification. */
965 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 966 if (cdev->handler)
967 cdev->handler(cdev, cdev->private->intparm,
e7769b48 968 ERR_PTR(-EIO));
1da177e4
LT		 969}
970
971static void
28bdc6f6 972ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1da177e4 973{
28bdc6f6 974 /* Start verification after current task finished. */
7e560814 975 cdev->private->flags.doverify = 1;
1da177e4
LT		 976}
977
978static void
979ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
980{
981 struct irb *irb;
982
983 switch (dev_event) {
984 case DEV_EVENT_INTERRUPT:
985 irb = (struct irb *) __LC_IRB;
986 /* Check for unsolicited interrupt. */
23d805b6 987 if ((scsw_stctl(&irb->scsw) ==
1da177e4 988 (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
23d805b6 989 (!scsw_cc(&irb->scsw)))
1da177e4
LT		 990 /* FIXME: we should restart stlck here, but this
991 * is extremely unlikely ... */
992 goto out_wakeup;
993
994 ccw_device_accumulate_irb(cdev, irb);
995 /* We don't care about basic sense etc. */
996 break;
997 default: /* timeout */
998 break;
999 }
1000out_wakeup:
1001 wake_up(&cdev->private->wait_q);
1002}
1003
1004static void
1005ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1006{
1007 struct subchannel *sch;
1008
1009 sch = to_subchannel(cdev->dev.parent);
edf22096 1010 if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0)
1da177e4
LT		 1011 /* Couldn't enable the subchannel for i/o. Sick device. */
1012 return;
1013
1014 /* After 60s the device recognition is considered to have failed. */
1015 ccw_device_set_timeout(cdev, 60*HZ);
1016
1017 cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
1018 ccw_device_sense_id_start(cdev);
1019}
1020
c820de39 1021void ccw_device_trigger_reprobe(struct ccw_device *cdev)
1da177e4 1022{
c820de39 1023 struct subchannel *sch;
1da177e4 1024
1da177e4
LT		 1025 if (cdev->private->state != DEV_STATE_DISCONNECTED)
1026 return;
1027
c820de39 1028 sch = to_subchannel(cdev->dev.parent);
1da177e4 1029 /* Update some values. */
cdb912a4 1030 if (cio_update_schib(sch))
7674da77 1031 return;
1da177e4
LT		 1032 /*
1033 * The pim, pam, pom values may not be accurate, but they are the best
1034 * we have before performing device selection :/
1035 */
28bdc6f6 1036 sch->lpm = sch->schib.pmcw.pam & sch->opm;
13952ec1
SO		 1037 /*
1038 * Use the initial configuration since we can't be shure that the old
1039 * paths are valid.
1040 */
1041 io_subchannel_init_config(sch);
f444cc0e
SO		 1042 if (cio_commit_config(sch))
1043 return;
13952ec1 1044
1da177e4 1045 /* We should also udate ssd info, but this has to wait. */
d7b5a4c9
CH		 1046 /* Check if this is another device which appeared on the same sch. */
1047 if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
1048 PREPARE_WORK(&cdev->private->kick_work,
1049 ccw_device_move_to_orphanage);
c5d4a999 1050 queue_work(slow_path_wq, &cdev->private->kick_work);
d7b5a4c9
CH		 1051 } else
1052 ccw_device_start_id(cdev, 0);
1da177e4
LT		 1053}
1054
1055static void
1056ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event)
1057{
1058 struct subchannel *sch;
1059
1060 sch = to_subchannel(cdev->dev.parent);
1061 /*
1062 * An interrupt in state offline means a previous disable was not
ed04b892 1063 * successful - should not happen, but we try to disable again.
1da177e4
LT		 1064 */
1065 cio_disable_subchannel(sch);
1066}
1067
1068static void
1069ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
1070{
1071 retry_set_schib(cdev);
1072 cdev->private->state = DEV_STATE_ONLINE;
1073 dev_fsm_event(cdev, dev_event);
1074}
1075
94bb0633
CH		 1076static void ccw_device_update_cmfblock(struct ccw_device *cdev,
1077 enum dev_event dev_event)
1078{
1079 cmf_retry_copy_block(cdev);
1080 cdev->private->state = DEV_STATE_ONLINE;
1081 dev_fsm_event(cdev, dev_event);
1082}
1da177e4
LT		 1083
1084static void
1085ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1086{
1087 ccw_device_set_timeout(cdev, 0);
1088 if (dev_event == DEV_EVENT_NOTOPER)
1089 cdev->private->state = DEV_STATE_NOT_OPER;
1090 else
1091 cdev->private->state = DEV_STATE_OFFLINE;
1092 wake_up(&cdev->private->wait_q);
1093}
1094
1095static void
1096ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1097{
1098 int ret;
1099
1100 ret = ccw_device_cancel_halt_clear(cdev);
1101 switch (ret) {
1102 case 0:
1103 cdev->private->state = DEV_STATE_OFFLINE;
1104 wake_up(&cdev->private->wait_q);
1105 break;
1106 case -ENODEV:
1107 cdev->private->state = DEV_STATE_NOT_OPER;
1108 wake_up(&cdev->private->wait_q);
1109 break;
1110 default:
1111 ccw_device_set_timeout(cdev, HZ/10);
1112 }
1113}
1114
1115/*
1116 * No operation action. This is used e.g. to ignore a timeout event in
1117 * state offline.
1118 */
1119static void
1120ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1121{
1122}
1123
1124/*
1125 * Bug operation action.
1126 */
1127static void
1128ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
1129{
139b83dd
ME		 1130 CIO_MSG_EVENT(0, "Internal state [%i][%i] not handled for device "
1131 "0.%x.%04x\n", cdev->private->state, dev_event,
1132 cdev->private->dev_id.ssid,
1133 cdev->private->dev_id.devno);
1da177e4
LT		 1134 BUG();
1135}
1136
1137/*
1138 * device statemachine
1139 */
1140fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1141 [DEV_STATE_NOT_OPER] = {
1142 [DEV_EVENT_NOTOPER] = ccw_device_nop,
1143 [DEV_EVENT_INTERRUPT] = ccw_device_bug,
1144 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1145 [DEV_EVENT_VERIFY] = ccw_device_nop,
1146 },
1147 [DEV_STATE_SENSE_PGID] = {
3f4cf6e7 1148 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1149 [DEV_EVENT_INTERRUPT] = ccw_device_sense_pgid_irq,
1150 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
1151 [DEV_EVENT_VERIFY] = ccw_device_nop,
1152 },
1153 [DEV_STATE_SENSE_ID] = {
1154 [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper,
1155 [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq,
1156 [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout,
1157 [DEV_EVENT_VERIFY] = ccw_device_nop,
1158 },
1159 [DEV_STATE_OFFLINE] = {
3f4cf6e7 1160 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1161 [DEV_EVENT_INTERRUPT] = ccw_device_offline_irq,
1162 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1f1148c8 1163 [DEV_EVENT_VERIFY] = ccw_device_offline_verify,
1da177e4
LT		 1164 },
1165 [DEV_STATE_VERIFY] = {
3f4cf6e7 1166 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1167 [DEV_EVENT_INTERRUPT] = ccw_device_verify_irq,
1168 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
28bdc6f6 1169 [DEV_EVENT_VERIFY] = ccw_device_delay_verify,
1da177e4
LT		 1170 },
1171 [DEV_STATE_ONLINE] = {
3f4cf6e7 1172 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1173 [DEV_EVENT_INTERRUPT] = ccw_device_irq,
1174 [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout,
1175 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1176 },
1177 [DEV_STATE_W4SENSE] = {
3f4cf6e7 1178 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1179 [DEV_EVENT_INTERRUPT] = ccw_device_w4sense,
1180 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1181 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1182 },
1183 [DEV_STATE_DISBAND_PGID] = {
3f4cf6e7 1184 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1185 [DEV_EVENT_INTERRUPT] = ccw_device_disband_irq,
1186 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
1187 [DEV_EVENT_VERIFY] = ccw_device_nop,
1188 },
1189 [DEV_STATE_BOXED] = {
3f4cf6e7 1190 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1191 [DEV_EVENT_INTERRUPT] = ccw_device_stlck_done,
1192 [DEV_EVENT_TIMEOUT] = ccw_device_stlck_done,
1193 [DEV_EVENT_VERIFY] = ccw_device_nop,
1194 },
1195 /* states to wait for i/o completion before doing something */
1196 [DEV_STATE_CLEAR_VERIFY] = {
3f4cf6e7 1197 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1198 [DEV_EVENT_INTERRUPT] = ccw_device_clear_verify,
1199 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1200 [DEV_EVENT_VERIFY] = ccw_device_nop,
1201 },
1202 [DEV_STATE_TIMEOUT_KILL] = {
3f4cf6e7 1203 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1204 [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq,
1205 [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout,
1206 [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME
1207 },
1da177e4
LT		 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,
28bdc6f6 1219 [DEV_EVENT_VERIFY] = ccw_device_start_id,
1da177e4
LT		 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 },
94bb0633
CH		 1233 [DEV_STATE_CMFUPDATE] = {
1234 [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock,
1235 [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock,
1236 [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock,
1237 [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock,
1238 },
1da177e4
LT		 1239};
1240
1da177e4 1241EXPORT_SYMBOL_GPL(ccw_device_set_timeout);
Clone of davem's net-next-2.6 tree