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[S390] cio: fix not oper handling after failed [on|off]line processing
[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 }
626e476a
SO		 397 if (state == DEV_STATE_NOT_OPER) {
398 CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n",
399 cdev->private->dev_id.devno, sch->schid.sch_no);
400 if (!ccw_device_notify(cdev, CIO_GONE))
401 ccw_device_schedule_sch_unregister(cdev);
402 cdev->private->flags.donotify = 0;
403 }
1da177e4
LT		 404
405 if (cdev->private->flags.donotify) {
406 cdev->private->flags.donotify = 0;
91c36919 407 ccw_device_oper_notify(cdev);
1da177e4
LT		 408 }
409 wake_up(&cdev->private->wait_q);
1da177e4
LT		 410}
411
4d284cac 412static int cmp_pgid(struct pgid *p1, struct pgid *p2)
7e560814
CH		 413{
414 char *c1;
415 char *c2;
416
417 c1 = (char *)p1;
418 c2 = (char *)p2;
419
420 return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
421}
422
423static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
424{
425 int i;
426 int last;
427
428 last = 0;
429 for (i = 0; i < 8; i++) {
430 if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
431 /* No PGID yet */
432 continue;
433 if (cdev->private->pgid[last].inf.ps.state1 ==
434 SNID_STATE1_RESET) {
435 /* First non-zero PGID */
436 last = i;
437 continue;
438 }
439 if (cmp_pgid(&cdev->private->pgid[i],
440 &cdev->private->pgid[last]) == 0)
441 /* Non-conflicting PGIDs */
442 continue;
443
444 /* PGID mismatch, can't pathgroup. */
445 CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
446 "0.%x.%04x, can't pathgroup\n",
78964268
CH		 447 cdev->private->dev_id.ssid,
448 cdev->private->dev_id.devno);
7e560814
CH		 449 cdev->private->options.pgroup = 0;
450 return;
451 }
452 if (cdev->private->pgid[last].inf.ps.state1 ==
453 SNID_STATE1_RESET)
454 /* No previous pgid found */
7c9f4e3a
CH		 455 memcpy(&cdev->private->pgid[0],
456 &channel_subsystems[0]->global_pgid,
7e560814
CH		 457 sizeof(struct pgid));
458 else
459 /* Use existing pgid */
460 memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
461 sizeof(struct pgid));
462}
463
1da177e4
LT		 464/*
465 * Function called from device_pgid.c after sense path ground has completed.
466 */
467void
468ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
469{
470 struct subchannel *sch;
471
472 sch = to_subchannel(cdev->dev.parent);
473 switch (err) {
7e560814
CH		 474 case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
475 cdev->private->options.pgroup = 0;
476 break;
477 case 0: /* success */
478 case -EACCES: /* partial success, some paths not operational */
479 /* Check if all pgids are equal or 0. */
480 __ccw_device_get_common_pgid(cdev);
1da177e4
LT		 481 break;
482 case -ETIME: /* Sense path group id stopped by timeout. */
483 case -EUSERS: /* device is reserved for someone else. */
484 ccw_device_done(cdev, DEV_STATE_BOXED);
7e560814 485 return;
1da177e4
LT		 486 default:
487 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
7e560814 488 return;
1da177e4 489 }
7e560814 490 /* Start Path Group verification. */
7e560814 491 cdev->private->state = DEV_STATE_VERIFY;
28bdc6f6 492 cdev->private->flags.doverify = 0;
7e560814 493 ccw_device_verify_start(cdev);
1da177e4
LT		 494}
495
496/*
497 * Start device recognition.
498 */
499int
500ccw_device_recognition(struct ccw_device *cdev)
501{
502 struct subchannel *sch;
503 int ret;
504
1da177e4 505 sch = to_subchannel(cdev->dev.parent);
edf22096 506 ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
1da177e4
LT		 507 if (ret != 0)
508 /* Couldn't enable the subchannel for i/o. Sick device. */
509 return ret;
510
511 /* After 60s the device recognition is considered to have failed. */
512 ccw_device_set_timeout(cdev, 60*HZ);
513
514 /*
515 * We used to start here with a sense pgid to find out whether a device
516 * is locked by someone else. Unfortunately, the sense pgid command
517 * code has other meanings on devices predating the path grouping
518 * algorithm, so we start with sense id and box the device after an
519 * timeout (or if sense pgid during path verification detects the device
520 * is locked, as may happen on newer devices).
521 */
522 cdev->private->flags.recog_done = 0;
523 cdev->private->state = DEV_STATE_SENSE_ID;
524 ccw_device_sense_id_start(cdev);
525 return 0;
526}
527
528/*
529 * Handle timeout in device recognition.
530 */
531static void
532ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
533{
534 int ret;
535
536 ret = ccw_device_cancel_halt_clear(cdev);
537 switch (ret) {
538 case 0:
539 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
540 break;
541 case -ENODEV:
542 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
543 break;
544 default:
545 ccw_device_set_timeout(cdev, 3*HZ);
546 }
547}
548
549
1da177e4
LT		 550void
551ccw_device_verify_done(struct ccw_device *cdev, int err)
552{
28bdc6f6
PO		 553 struct subchannel *sch;
554
555 sch = to_subchannel(cdev->dev.parent);
556 /* Update schib - pom may have changed. */
cdb912a4
SO		 557 if (cio_update_schib(sch)) {
558 cdev->private->flags.donotify = 0;
559 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
560 return;
561 }
28bdc6f6
PO		 562 /* Update lpm with verified path mask. */
563 sch->lpm = sch->vpm;
564 /* Repeat path verification? */
565 if (cdev->private->flags.doverify) {
566 cdev->private->flags.doverify = 0;
567 ccw_device_verify_start(cdev);
568 return;
569 }
1da177e4
LT		 570 switch (err) {
571 case -EOPNOTSUPP: /* path grouping not supported, just set online. */
572 cdev->private->options.pgroup = 0;
573 case 0:
574 ccw_device_done(cdev, DEV_STATE_ONLINE);
575 /* Deliver fake irb to device driver, if needed. */
576 if (cdev->private->flags.fake_irb) {
577 memset(&cdev->private->irb, 0, sizeof(struct irb));
23d805b6
PO		 578 cdev->private->irb.scsw.cmd.cc = 1;
579 cdev->private->irb.scsw.cmd.fctl = SCSW_FCTL_START_FUNC;
580 cdev->private->irb.scsw.cmd.actl = SCSW_ACTL_START_PEND;
581 cdev->private->irb.scsw.cmd.stctl =
582 SCSW_STCTL_STATUS_PEND;
1da177e4
LT		 583 cdev->private->flags.fake_irb = 0;
584 if (cdev->handler)
585 cdev->handler(cdev, cdev->private->intparm,
586 &cdev->private->irb);
587 memset(&cdev->private->irb, 0, sizeof(struct irb));
588 }
589 break;
590 case -ETIME:
8b42f5c2
PO		 591 /* Reset oper notify indication after verify error. */
592 cdev->private->flags.donotify = 0;
1da177e4
LT		 593 ccw_device_done(cdev, DEV_STATE_BOXED);
594 break;
595 default:
8b42f5c2
PO		 596 /* Reset oper notify indication after verify error. */
597 cdev->private->flags.donotify = 0;
46258ab5
CH		 598 if (cdev->online) {
599 ccw_device_set_timeout(cdev, 0);
3f4cf6e7 600 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
46258ab5 601 } else
ee04bbcc 602 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
1da177e4
LT		 603 break;
604 }
605}
606
607/*
608 * Get device online.
609 */
610int
611ccw_device_online(struct ccw_device *cdev)
612{
613 struct subchannel *sch;
614 int ret;
615
616 if ((cdev->private->state != DEV_STATE_OFFLINE) &&
617 (cdev->private->state != DEV_STATE_BOXED))
618 return -EINVAL;
619 sch = to_subchannel(cdev->dev.parent);
edf22096 620 ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
1da177e4
LT		 621 if (ret != 0) {
622 /* Couldn't enable the subchannel for i/o. Sick device. */
623 if (ret == -ENODEV)
624 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
625 return ret;
626 }
627 /* Do we want to do path grouping? */
628 if (!cdev->private->options.pgroup) {
7e560814
CH		 629 /* Start initial path verification. */
630 cdev->private->state = DEV_STATE_VERIFY;
28bdc6f6 631 cdev->private->flags.doverify = 0;
7e560814 632 ccw_device_verify_start(cdev);
1da177e4
LT		 633 return 0;
634 }
635 /* Do a SensePGID first. */
636 cdev->private->state = DEV_STATE_SENSE_PGID;
637 ccw_device_sense_pgid_start(cdev);
638 return 0;
639}
640
641void
642ccw_device_disband_done(struct ccw_device *cdev, int err)
643{
644 switch (err) {
645 case 0:
646 ccw_device_done(cdev, DEV_STATE_OFFLINE);
647 break;
648 case -ETIME:
649 ccw_device_done(cdev, DEV_STATE_BOXED);
650 break;
651 default:
3ecb0a5a 652 cdev->private->flags.donotify = 0;
3f4cf6e7 653 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
1da177e4
LT		 654 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
655 break;
656 }
657}
658
659/*
660 * Shutdown device.
661 */
662int
663ccw_device_offline(struct ccw_device *cdev)
664{
665 struct subchannel *sch;
666
b301ea8c
PO		 667 /* Allow ccw_device_offline while disconnected. */
668 if (cdev->private->state == DEV_STATE_DISCONNECTED ||
669 cdev->private->state == DEV_STATE_NOT_OPER) {
670 cdev->private->flags.donotify = 0;
671 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
672 return 0;
673 }
d7b5a4c9
CH		 674 if (ccw_device_is_orphan(cdev)) {
675 ccw_device_done(cdev, DEV_STATE_OFFLINE);
676 return 0;
677 }
1da177e4 678 sch = to_subchannel(cdev->dev.parent);
cdb912a4 679 if (cio_update_schib(sch))
1da177e4 680 return -ENODEV;
23d805b6 681 if (scsw_actl(&sch->schib.scsw) != 0)
1da177e4 682 return -EBUSY;
23d805b6
PO		 683 if (cdev->private->state != DEV_STATE_ONLINE)
684 return -EINVAL;
1da177e4
LT		 685 /* Are we doing path grouping? */
686 if (!cdev->private->options.pgroup) {
687 /* No, set state offline immediately. */
688 ccw_device_done(cdev, DEV_STATE_OFFLINE);
689 return 0;
690 }
691 /* Start Set Path Group commands. */
692 cdev->private->state = DEV_STATE_DISBAND_PGID;
693 ccw_device_disband_start(cdev);
694 return 0;
695}
696
697/*
698 * Handle timeout in device online/offline process.
699 */
700static void
701ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
702{
703 int ret;
704
705 ret = ccw_device_cancel_halt_clear(cdev);
706 switch (ret) {
707 case 0:
708 ccw_device_done(cdev, DEV_STATE_BOXED);
709 break;
710 case -ENODEV:
711 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
712 break;
713 default:
714 ccw_device_set_timeout(cdev, 3*HZ);
715 }
716}
717
718/*
719 * Handle not oper event in device recognition.
720 */
721static void
722ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
723{
724 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
725}
726
727/*
3f4cf6e7 728 * Handle not operational event in non-special state.
1da177e4 729 */
3f4cf6e7
CH		 730static void ccw_device_generic_notoper(struct ccw_device *cdev,
731 enum dev_event dev_event)
1da177e4
LT		 732{
733 struct subchannel *sch;
734
c08f294a 735 ccw_device_set_notoper(cdev);
1da177e4 736 sch = to_subchannel(cdev->dev.parent);
3f4cf6e7 737 css_schedule_eval(sch->schid);
1da177e4
LT		 738}
739
1f1148c8
PO		 740/*
741 * Handle path verification event in offline state.
742 */
743static void ccw_device_offline_verify(struct ccw_device *cdev,
744 enum dev_event dev_event)
745{
746 struct subchannel *sch = to_subchannel(cdev->dev.parent);
747
748 css_schedule_eval(sch->schid);
749}
750
1da177e4
LT		 751/*
752 * Handle path verification event.
753 */
754static void
755ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
756{
757 struct subchannel *sch;
758
1da177e4
LT		 759 if (cdev->private->state == DEV_STATE_W4SENSE) {
760 cdev->private->flags.doverify = 1;
761 return;
762 }
763 sch = to_subchannel(cdev->dev.parent);
764 /*
765 * Since we might not just be coming from an interrupt from the
766 * subchannel we have to update the schib.
767 */
cdb912a4
SO		 768 if (cio_update_schib(sch)) {
769 ccw_device_verify_done(cdev, -ENODEV);
770 return;
771 }
1da177e4 772
23d805b6
PO		 773 if (scsw_actl(&sch->schib.scsw) != 0 ||
774 (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
775 (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) {
1da177e4
LT		 776 /*
777 * No final status yet or final status not yet delivered
778 * to the device driver. Can't do path verfication now,
779 * delay until final status was delivered.
780 */
781 cdev->private->flags.doverify = 1;
782 return;
783 }
784 /* Device is idle, we can do the path verification. */
785 cdev->private->state = DEV_STATE_VERIFY;
28bdc6f6 786 cdev->private->flags.doverify = 0;
1da177e4
LT		 787 ccw_device_verify_start(cdev);
788}
789
790/*
791 * Got an interrupt for a normal io (state online).
792 */
793static void
794ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
795{
796 struct irb *irb;
83262d63 797 int is_cmd;
1da177e4
LT		 798
799 irb = (struct irb *) __LC_IRB;
83262d63 800 is_cmd = !scsw_is_tm(&irb->scsw);
1da177e4 801 /* Check for unsolicited interrupt. */
23d805b6 802 if (!scsw_is_solicited(&irb->scsw)) {
83262d63 803 if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
1da177e4
LT		 804 !irb->esw.esw0.erw.cons) {
805 /* Unit check but no sense data. Need basic sense. */
806 if (ccw_device_do_sense(cdev, irb) != 0)
807 goto call_handler_unsol;
e0ec5749 808 memcpy(&cdev->private->irb, irb, sizeof(struct irb));
1da177e4
LT		 809 cdev->private->state = DEV_STATE_W4SENSE;
810 cdev->private->intparm = 0;
811 return;
812 }
813call_handler_unsol:
814 if (cdev->handler)
815 cdev->handler (cdev, 0, irb);
18374d37
CH		 816 if (cdev->private->flags.doverify)
817 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 818 return;
819 }
820 /* Accumulate status and find out if a basic sense is needed. */
821 ccw_device_accumulate_irb(cdev, irb);
83262d63 822 if (is_cmd && cdev->private->flags.dosense) {
1da177e4
LT		 823 if (ccw_device_do_sense(cdev, irb) == 0) {
824 cdev->private->state = DEV_STATE_W4SENSE;
825 }
826 return;
827 }
828 /* Call the handler. */
829 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
830 /* Start delayed path verification. */
831 ccw_device_online_verify(cdev, 0);
832}
833
834/*
835 * Got an timeout in online state.
836 */
837static void
838ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
839{
840 int ret;
841
842 ccw_device_set_timeout(cdev, 0);
843 ret = ccw_device_cancel_halt_clear(cdev);
844 if (ret == -EBUSY) {
845 ccw_device_set_timeout(cdev, 3*HZ);
846 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
847 return;
848 }
3f4cf6e7
CH		 849 if (ret == -ENODEV)
850 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
851 else if (cdev->handler)
1da177e4
LT		 852 cdev->handler(cdev, cdev->private->intparm,
853 ERR_PTR(-ETIMEDOUT));
854}
855
856/*
857 * Got an interrupt for a basic sense.
858 */
2b67fc46 859static void
1da177e4
LT		 860ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
861{
862 struct irb *irb;
863
864 irb = (struct irb *) __LC_IRB;
865 /* Check for unsolicited interrupt. */
23d805b6
PO		 866 if (scsw_stctl(&irb->scsw) ==
867 (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
868 if (scsw_cc(&irb->scsw) == 1)
1da177e4
LT		 869 /* Basic sense hasn't started. Try again. */
870 ccw_device_do_sense(cdev, irb);
871 else {
139b83dd 872 CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited "
e556bbbd
CH		 873 "interrupt during w4sense...\n",
874 cdev->private->dev_id.ssid,
875 cdev->private->dev_id.devno);
1da177e4
LT		 876 if (cdev->handler)
877 cdev->handler (cdev, 0, irb);
878 }
879 return;
880 }
3ba1998e
CH		 881 /*
882 * Check if a halt or clear has been issued in the meanwhile. If yes,
883 * only deliver the halt/clear interrupt to the device driver as if it
884 * had killed the original request.
885 */
23d805b6
PO		 886 if (scsw_fctl(&irb->scsw) &
887 (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
d23861ff
CH		 888 /* Retry Basic Sense if requested. */
889 if (cdev->private->flags.intretry) {
890 cdev->private->flags.intretry = 0;
891 ccw_device_do_sense(cdev, irb);
892 return;
893 }
3ba1998e
CH		 894 cdev->private->flags.dosense = 0;
895 memset(&cdev->private->irb, 0, sizeof(struct irb));
896 ccw_device_accumulate_irb(cdev, irb);
897 goto call_handler;
898 }
1da177e4
LT		 899 /* Add basic sense info to irb. */
900 ccw_device_accumulate_basic_sense(cdev, irb);
901 if (cdev->private->flags.dosense) {
902 /* Another basic sense is needed. */
903 ccw_device_do_sense(cdev, irb);
904 return;
905 }
3ba1998e 906call_handler:
1da177e4
LT		 907 cdev->private->state = DEV_STATE_ONLINE;
908 /* Call the handler. */
909 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
910 /* Start delayed path verification. */
911 ccw_device_online_verify(cdev, 0);
912}
913
914static void
915ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
916{
917 struct irb *irb;
918
919 irb = (struct irb *) __LC_IRB;
920 /* Accumulate status. We don't do basic sense. */
921 ccw_device_accumulate_irb(cdev, irb);
b4f7b1ee
CH		 922 /* Remember to clear irb to avoid residuals. */
923 memset(&cdev->private->irb, 0, sizeof(struct irb));
1da177e4
LT		 924 /* Try to start delayed device verification. */
925 ccw_device_online_verify(cdev, 0);
926 /* Note: Don't call handler for cio initiated clear! */
927}
928
929static void
930ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
931{
932 struct subchannel *sch;
933
934 sch = to_subchannel(cdev->dev.parent);
935 ccw_device_set_timeout(cdev, 0);
7c8427c3
CH		 936 /* Start delayed path verification. */
937 ccw_device_online_verify(cdev, 0);
1da177e4 938 /* OK, i/o is dead now. Call interrupt handler. */
1da177e4
LT		 939 if (cdev->handler)
940 cdev->handler(cdev, cdev->private->intparm,
e7769b48 941 ERR_PTR(-EIO));
1da177e4
LT		 942}
943
944static void
945ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
946{
947 int ret;
948
949 ret = ccw_device_cancel_halt_clear(cdev);
950 if (ret == -EBUSY) {
951 ccw_device_set_timeout(cdev, 3*HZ);
952 return;
953 }
7c8427c3
CH		 954 /* Start delayed path verification. */
955 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 956 if (cdev->handler)
957 cdev->handler(cdev, cdev->private->intparm,
e7769b48 958 ERR_PTR(-EIO));
1da177e4
LT		 959}
960
c820de39 961void ccw_device_kill_io(struct ccw_device *cdev)
1da177e4
LT		 962{
963 int ret;
1da177e4 964
1da177e4
LT		 965 ret = ccw_device_cancel_halt_clear(cdev);
966 if (ret == -EBUSY) {
967 ccw_device_set_timeout(cdev, 3*HZ);
968 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
969 return;
970 }
7c8427c3
CH		 971 /* Start delayed path verification. */
972 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 973 if (cdev->handler)
974 cdev->handler(cdev, cdev->private->intparm,
e7769b48 975 ERR_PTR(-EIO));
1da177e4
LT		 976}
977
978static void
28bdc6f6 979ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1da177e4 980{
28bdc6f6 981 /* Start verification after current task finished. */
7e560814 982 cdev->private->flags.doverify = 1;
1da177e4
LT		 983}
984
985static void
986ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
987{
988 struct irb *irb;
989
990 switch (dev_event) {
991 case DEV_EVENT_INTERRUPT:
992 irb = (struct irb *) __LC_IRB;
993 /* Check for unsolicited interrupt. */
23d805b6 994 if ((scsw_stctl(&irb->scsw) ==
1da177e4 995 (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
23d805b6 996 (!scsw_cc(&irb->scsw)))
1da177e4
LT		 997 /* FIXME: we should restart stlck here, but this
998 * is extremely unlikely ... */
999 goto out_wakeup;
1000
1001 ccw_device_accumulate_irb(cdev, irb);
1002 /* We don't care about basic sense etc. */
1003 break;
1004 default: /* timeout */
1005 break;
1006 }
1007out_wakeup:
1008 wake_up(&cdev->private->wait_q);
1009}
1010
1011static void
1012ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1013{
1014 struct subchannel *sch;
1015
1016 sch = to_subchannel(cdev->dev.parent);
edf22096 1017 if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0)
1da177e4
LT		 1018 /* Couldn't enable the subchannel for i/o. Sick device. */
1019 return;
1020
1021 /* After 60s the device recognition is considered to have failed. */
1022 ccw_device_set_timeout(cdev, 60*HZ);
1023
1024 cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
1025 ccw_device_sense_id_start(cdev);
1026}
1027
c820de39 1028void ccw_device_trigger_reprobe(struct ccw_device *cdev)
1da177e4 1029{
c820de39 1030 struct subchannel *sch;
1da177e4 1031
1da177e4
LT		 1032 if (cdev->private->state != DEV_STATE_DISCONNECTED)
1033 return;
1034
c820de39 1035 sch = to_subchannel(cdev->dev.parent);
1da177e4 1036 /* Update some values. */
cdb912a4 1037 if (cio_update_schib(sch))
7674da77 1038 return;
1da177e4
LT		 1039 /*
1040 * The pim, pam, pom values may not be accurate, but they are the best
1041 * we have before performing device selection :/
1042 */
28bdc6f6 1043 sch->lpm = sch->schib.pmcw.pam & sch->opm;
13952ec1
SO		 1044 /*
1045 * Use the initial configuration since we can't be shure that the old
1046 * paths are valid.
1047 */
1048 io_subchannel_init_config(sch);
f444cc0e
SO		 1049 if (cio_commit_config(sch))
1050 return;
13952ec1 1051
1da177e4 1052 /* We should also udate ssd info, but this has to wait. */
d7b5a4c9
CH		 1053 /* Check if this is another device which appeared on the same sch. */
1054 if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
1055 PREPARE_WORK(&cdev->private->kick_work,
1056 ccw_device_move_to_orphanage);
c5d4a999 1057 queue_work(slow_path_wq, &cdev->private->kick_work);
d7b5a4c9
CH		 1058 } else
1059 ccw_device_start_id(cdev, 0);
1da177e4
LT		 1060}
1061
1062static void
1063ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event)
1064{
1065 struct subchannel *sch;
1066
1067 sch = to_subchannel(cdev->dev.parent);
1068 /*
1069 * An interrupt in state offline means a previous disable was not
ed04b892 1070 * successful - should not happen, but we try to disable again.
1da177e4
LT		 1071 */
1072 cio_disable_subchannel(sch);
1073}
1074
1075static void
1076ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
1077{
1078 retry_set_schib(cdev);
1079 cdev->private->state = DEV_STATE_ONLINE;
1080 dev_fsm_event(cdev, dev_event);
1081}
1082
94bb0633
CH		 1083static void ccw_device_update_cmfblock(struct ccw_device *cdev,
1084 enum dev_event dev_event)
1085{
1086 cmf_retry_copy_block(cdev);
1087 cdev->private->state = DEV_STATE_ONLINE;
1088 dev_fsm_event(cdev, dev_event);
1089}
1da177e4
LT		 1090
1091static void
1092ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1093{
1094 ccw_device_set_timeout(cdev, 0);
1095 if (dev_event == DEV_EVENT_NOTOPER)
1096 cdev->private->state = DEV_STATE_NOT_OPER;
1097 else
1098 cdev->private->state = DEV_STATE_OFFLINE;
1099 wake_up(&cdev->private->wait_q);
1100}
1101
1102static void
1103ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1104{
1105 int ret;
1106
1107 ret = ccw_device_cancel_halt_clear(cdev);
1108 switch (ret) {
1109 case 0:
1110 cdev->private->state = DEV_STATE_OFFLINE;
1111 wake_up(&cdev->private->wait_q);
1112 break;
1113 case -ENODEV:
1114 cdev->private->state = DEV_STATE_NOT_OPER;
1115 wake_up(&cdev->private->wait_q);
1116 break;
1117 default:
1118 ccw_device_set_timeout(cdev, HZ/10);
1119 }
1120}
1121
1122/*
1123 * No operation action. This is used e.g. to ignore a timeout event in
1124 * state offline.
1125 */
1126static void
1127ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1128{
1129}
1130
1131/*
1132 * Bug operation action.
1133 */
1134static void
1135ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
1136{
139b83dd
ME		 1137 CIO_MSG_EVENT(0, "Internal state [%i][%i] not handled for device "
1138 "0.%x.%04x\n", cdev->private->state, dev_event,
1139 cdev->private->dev_id.ssid,
1140 cdev->private->dev_id.devno);
1da177e4
LT		 1141 BUG();
1142}
1143
1144/*
1145 * device statemachine
1146 */
1147fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1148 [DEV_STATE_NOT_OPER] = {
1149 [DEV_EVENT_NOTOPER] = ccw_device_nop,
1150 [DEV_EVENT_INTERRUPT] = ccw_device_bug,
1151 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1152 [DEV_EVENT_VERIFY] = ccw_device_nop,
1153 },
1154 [DEV_STATE_SENSE_PGID] = {
3f4cf6e7 1155 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1156 [DEV_EVENT_INTERRUPT] = ccw_device_sense_pgid_irq,
1157 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
1158 [DEV_EVENT_VERIFY] = ccw_device_nop,
1159 },
1160 [DEV_STATE_SENSE_ID] = {
1161 [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper,
1162 [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq,
1163 [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout,
1164 [DEV_EVENT_VERIFY] = ccw_device_nop,
1165 },
1166 [DEV_STATE_OFFLINE] = {
3f4cf6e7 1167 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1168 [DEV_EVENT_INTERRUPT] = ccw_device_offline_irq,
1169 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1f1148c8 1170 [DEV_EVENT_VERIFY] = ccw_device_offline_verify,
1da177e4
LT		 1171 },
1172 [DEV_STATE_VERIFY] = {
3f4cf6e7 1173 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1174 [DEV_EVENT_INTERRUPT] = ccw_device_verify_irq,
1175 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
28bdc6f6 1176 [DEV_EVENT_VERIFY] = ccw_device_delay_verify,
1da177e4
LT		 1177 },
1178 [DEV_STATE_ONLINE] = {
3f4cf6e7 1179 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1180 [DEV_EVENT_INTERRUPT] = ccw_device_irq,
1181 [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout,
1182 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1183 },
1184 [DEV_STATE_W4SENSE] = {
3f4cf6e7 1185 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1186 [DEV_EVENT_INTERRUPT] = ccw_device_w4sense,
1187 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1188 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1189 },
1190 [DEV_STATE_DISBAND_PGID] = {
3f4cf6e7 1191 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1192 [DEV_EVENT_INTERRUPT] = ccw_device_disband_irq,
1193 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
1194 [DEV_EVENT_VERIFY] = ccw_device_nop,
1195 },
1196 [DEV_STATE_BOXED] = {
3f4cf6e7 1197 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1198 [DEV_EVENT_INTERRUPT] = ccw_device_stlck_done,
1199 [DEV_EVENT_TIMEOUT] = ccw_device_stlck_done,
1200 [DEV_EVENT_VERIFY] = ccw_device_nop,
1201 },
1202 /* states to wait for i/o completion before doing something */
1203 [DEV_STATE_CLEAR_VERIFY] = {
3f4cf6e7 1204 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1205 [DEV_EVENT_INTERRUPT] = ccw_device_clear_verify,
1206 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1207 [DEV_EVENT_VERIFY] = ccw_device_nop,
1208 },
1209 [DEV_STATE_TIMEOUT_KILL] = {
3f4cf6e7 1210 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1211 [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq,
1212 [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout,
1213 [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME
1214 },
1da177e4
LT		 1215 [DEV_STATE_QUIESCE] = {
1216 [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done,
1217 [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done,
1218 [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout,
1219 [DEV_EVENT_VERIFY] = ccw_device_nop,
1220 },
1221 /* special states for devices gone not operational */
1222 [DEV_STATE_DISCONNECTED] = {
1223 [DEV_EVENT_NOTOPER] = ccw_device_nop,
1224 [DEV_EVENT_INTERRUPT] = ccw_device_start_id,
1225 [DEV_EVENT_TIMEOUT] = ccw_device_bug,
28bdc6f6 1226 [DEV_EVENT_VERIFY] = ccw_device_start_id,
1da177e4
LT		 1227 },
1228 [DEV_STATE_DISCONNECTED_SENSE_ID] = {
1229 [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper,
1230 [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq,
1231 [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout,
1232 [DEV_EVENT_VERIFY] = ccw_device_nop,
1233 },
1234 [DEV_STATE_CMFCHANGE] = {
1235 [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate,
1236 [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate,
1237 [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate,
1238 [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate,
1239 },
94bb0633
CH		 1240 [DEV_STATE_CMFUPDATE] = {
1241 [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock,
1242 [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock,
1243 [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock,
1244 [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock,
1245 },
1da177e4
LT		 1246};
1247
1da177e4 1248EXPORT_SYMBOL_GPL(ccw_device_set_timeout);
Clone of davem's net-next-2.6 tree