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[S390] cio: handle error during device recognition consistently
[mirror_ubuntu-artful-kernel.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);
37de53bb 292 ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
1da177e4 293 }
823d494a 294 return;
1da177e4 295 case DEV_STATE_BOXED:
139b83dd
ME		 296 CIO_MSG_EVENT(0, "SenseID : boxed device %04x on "
297 " subchannel 0.%x.%04x\n",
298 cdev->private->dev_id.devno,
299 sch->schid.ssid, sch->schid.sch_no);
47593bfa
SO		 300 if (cdev->id.cu_type != 0) { /* device was recognized before */
301 cdev->private->flags.recog_done = 1;
302 cdev->private->state = DEV_STATE_BOXED;
303 wake_up(&cdev->private->wait_q);
304 return;
305 }
1da177e4
LT		 306 break;
307 }
308 cdev->private->state = state;
309 io_subchannel_recog_done(cdev);
156013ff 310 wake_up(&cdev->private->wait_q);
1da177e4
LT		 311}
312
313/*
314 * Function called from device_id.c after sense id has completed.
315 */
316void
317ccw_device_sense_id_done(struct ccw_device *cdev, int err)
318{
319 switch (err) {
320 case 0:
321 ccw_device_recog_done(cdev, DEV_STATE_OFFLINE);
322 break;
323 case -ETIME: /* Sense id stopped by timeout. */
324 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
325 break;
326 default:
327 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
328 break;
329 }
330}
331
c820de39
CH		 332int ccw_device_notify(struct ccw_device *cdev, int event)
333{
334 if (!cdev->drv)
335 return 0;
336 if (!cdev->online)
337 return 0;
91c36919
PO		 338 CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n",
339 cdev->private->dev_id.ssid, cdev->private->dev_id.devno,
340 event);
c820de39
CH		 341 return cdev->drv->notify ? cdev->drv->notify(cdev, event) : 0;
342}
343
91c36919
PO		 344static void ccw_device_oper_notify(struct ccw_device *cdev)
345{
346 if (ccw_device_notify(cdev, CIO_OPER)) {
94bb0633 347 /* Reenable channel measurements, if needed. */
37de53bb 348 ccw_device_sched_todo(cdev, CDEV_TODO_ENABLE_CMF);
91c36919
PO		 349 return;
350 }
351 /* Driver doesn't want device back. */
352 ccw_device_set_notoper(cdev);
37de53bb 353 ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
1da177e4
LT		 354}
355
356/*
357 * Finished with online/offline processing.
358 */
359static void
360ccw_device_done(struct ccw_device *cdev, int state)
361{
362 struct subchannel *sch;
363
364 sch = to_subchannel(cdev->dev.parent);
365
f1ee3281
CH		 366 ccw_device_set_timeout(cdev, 0);
367
1da177e4
LT		 368 if (state != DEV_STATE_ONLINE)
369 cio_disable_subchannel(sch);
370
371 /* Reset device status. */
372 memset(&cdev->private->irb, 0, sizeof(struct irb));
373
374 cdev->private->state = state;
375
9a332116
PO		 376 switch (state) {
377 case DEV_STATE_BOXED:
139b83dd
ME		 378 CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
379 cdev->private->dev_id.devno, sch->schid.sch_no);
47593bfa 380 if (cdev->online && !ccw_device_notify(cdev, CIO_BOXED))
37de53bb 381 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
47593bfa 382 cdev->private->flags.donotify = 0;
9a332116
PO		 383 break;
384 case DEV_STATE_NOT_OPER:
626e476a
SO		 385 CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n",
386 cdev->private->dev_id.devno, sch->schid.sch_no);
387 if (!ccw_device_notify(cdev, CIO_GONE))
37de53bb 388 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
6afcc775
PO		 389 else
390 ccw_device_set_disconnected(cdev);
626e476a 391 cdev->private->flags.donotify = 0;
9a332116
PO		 392 break;
393 case DEV_STATE_DISCONNECTED:
394 CIO_MSG_EVENT(0, "Disconnected device %04x on subchannel "
395 "%04x\n", cdev->private->dev_id.devno,
396 sch->schid.sch_no);
397 if (!ccw_device_notify(cdev, CIO_NO_PATH))
37de53bb 398 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
9a332116
PO		 399 else
400 ccw_device_set_disconnected(cdev);
401 cdev->private->flags.donotify = 0;
402 break;
403 default:
404 break;
626e476a 405 }
1da177e4
LT		 406
407 if (cdev->private->flags.donotify) {
408 cdev->private->flags.donotify = 0;
91c36919 409 ccw_device_oper_notify(cdev);
1da177e4
LT		 410 }
411 wake_up(&cdev->private->wait_q);
1da177e4
LT		 412}
413
4d284cac 414static int cmp_pgid(struct pgid *p1, struct pgid *p2)
7e560814
CH		 415{
416 char *c1;
417 char *c2;
418
419 c1 = (char *)p1;
420 c2 = (char *)p2;
421
422 return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1);
423}
424
425static void __ccw_device_get_common_pgid(struct ccw_device *cdev)
426{
427 int i;
428 int last;
429
430 last = 0;
431 for (i = 0; i < 8; i++) {
432 if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET)
433 /* No PGID yet */
434 continue;
435 if (cdev->private->pgid[last].inf.ps.state1 ==
436 SNID_STATE1_RESET) {
437 /* First non-zero PGID */
438 last = i;
439 continue;
440 }
441 if (cmp_pgid(&cdev->private->pgid[i],
442 &cdev->private->pgid[last]) == 0)
443 /* Non-conflicting PGIDs */
444 continue;
445
446 /* PGID mismatch, can't pathgroup. */
447 CIO_MSG_EVENT(0, "SNID - pgid mismatch for device "
448 "0.%x.%04x, can't pathgroup\n",
78964268
CH		 449 cdev->private->dev_id.ssid,
450 cdev->private->dev_id.devno);
7e560814
CH		 451 cdev->private->options.pgroup = 0;
452 return;
453 }
454 if (cdev->private->pgid[last].inf.ps.state1 ==
455 SNID_STATE1_RESET)
456 /* No previous pgid found */
7c9f4e3a
CH		 457 memcpy(&cdev->private->pgid[0],
458 &channel_subsystems[0]->global_pgid,
7e560814
CH		 459 sizeof(struct pgid));
460 else
461 /* Use existing pgid */
462 memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last],
463 sizeof(struct pgid));
464}
465
1da177e4
LT		 466/*
467 * Function called from device_pgid.c after sense path ground has completed.
468 */
469void
470ccw_device_sense_pgid_done(struct ccw_device *cdev, int err)
471{
472 struct subchannel *sch;
473
474 sch = to_subchannel(cdev->dev.parent);
475 switch (err) {
7e560814
CH		 476 case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */
477 cdev->private->options.pgroup = 0;
478 break;
479 case 0: /* success */
480 case -EACCES: /* partial success, some paths not operational */
481 /* Check if all pgids are equal or 0. */
482 __ccw_device_get_common_pgid(cdev);
1da177e4
LT		 483 break;
484 case -ETIME: /* Sense path group id stopped by timeout. */
485 case -EUSERS: /* device is reserved for someone else. */
486 ccw_device_done(cdev, DEV_STATE_BOXED);
7e560814 487 return;
1da177e4
LT		 488 default:
489 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
7e560814 490 return;
1da177e4 491 }
7e560814 492 /* Start Path Group verification. */
7e560814 493 cdev->private->state = DEV_STATE_VERIFY;
28bdc6f6 494 cdev->private->flags.doverify = 0;
7e560814 495 ccw_device_verify_start(cdev);
1da177e4
LT		 496}
497
498/*
499 * Start device recognition.
500 */
736b5db8 501void ccw_device_recognition(struct ccw_device *cdev)
1da177e4 502{
736b5db8 503 struct subchannel *sch = to_subchannel(cdev->dev.parent);
1da177e4
LT		 504
505 /*
506 * We used to start here with a sense pgid to find out whether a device
507 * is locked by someone else. Unfortunately, the sense pgid command
508 * code has other meanings on devices predating the path grouping
509 * algorithm, so we start with sense id and box the device after an
510 * timeout (or if sense pgid during path verification detects the device
511 * is locked, as may happen on newer devices).
512 */
513 cdev->private->flags.recog_done = 0;
514 cdev->private->state = DEV_STATE_SENSE_ID;
736b5db8
PO		 515 if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) {
516 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
517 return;
518 }
1da177e4 519 ccw_device_sense_id_start(cdev);
1da177e4
LT		 520}
521
522/*
523 * Handle timeout in device recognition.
524 */
525static void
526ccw_device_recog_timeout(struct ccw_device *cdev, enum dev_event dev_event)
527{
528 int ret;
529
530 ret = ccw_device_cancel_halt_clear(cdev);
531 switch (ret) {
532 case 0:
533 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
534 break;
535 case -ENODEV:
536 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
537 break;
538 default:
539 ccw_device_set_timeout(cdev, 3*HZ);
540 }
541}
542
543
1da177e4
LT		 544void
545ccw_device_verify_done(struct ccw_device *cdev, int err)
546{
28bdc6f6
PO		 547 struct subchannel *sch;
548
549 sch = to_subchannel(cdev->dev.parent);
550 /* Update schib - pom may have changed. */
cdb912a4
SO		 551 if (cio_update_schib(sch)) {
552 cdev->private->flags.donotify = 0;
553 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
554 return;
555 }
28bdc6f6
PO		 556 /* Update lpm with verified path mask. */
557 sch->lpm = sch->vpm;
558 /* Repeat path verification? */
559 if (cdev->private->flags.doverify) {
560 cdev->private->flags.doverify = 0;
561 ccw_device_verify_start(cdev);
562 return;
563 }
1da177e4
LT		 564 switch (err) {
565 case -EOPNOTSUPP: /* path grouping not supported, just set online. */
566 cdev->private->options.pgroup = 0;
567 case 0:
568 ccw_device_done(cdev, DEV_STATE_ONLINE);
569 /* Deliver fake irb to device driver, if needed. */
570 if (cdev->private->flags.fake_irb) {
571 memset(&cdev->private->irb, 0, sizeof(struct irb));
23d805b6
PO		 572 cdev->private->irb.scsw.cmd.cc = 1;
573 cdev->private->irb.scsw.cmd.fctl = SCSW_FCTL_START_FUNC;
574 cdev->private->irb.scsw.cmd.actl = SCSW_ACTL_START_PEND;
575 cdev->private->irb.scsw.cmd.stctl =
576 SCSW_STCTL_STATUS_PEND;
1da177e4
LT		 577 cdev->private->flags.fake_irb = 0;
578 if (cdev->handler)
579 cdev->handler(cdev, cdev->private->intparm,
580 &cdev->private->irb);
581 memset(&cdev->private->irb, 0, sizeof(struct irb));
582 }
583 break;
584 case -ETIME:
8b42f5c2
PO		 585 /* Reset oper notify indication after verify error. */
586 cdev->private->flags.donotify = 0;
1da177e4
LT		 587 ccw_device_done(cdev, DEV_STATE_BOXED);
588 break;
589 default:
8b42f5c2
PO		 590 /* Reset oper notify indication after verify error. */
591 cdev->private->flags.donotify = 0;
46258ab5
CH		 592 if (cdev->online) {
593 ccw_device_set_timeout(cdev, 0);
3f4cf6e7 594 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
46258ab5 595 } else
ee04bbcc 596 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
1da177e4
LT		 597 break;
598 }
599}
600
601/*
602 * Get device online.
603 */
604int
605ccw_device_online(struct ccw_device *cdev)
606{
607 struct subchannel *sch;
608 int ret;
609
610 if ((cdev->private->state != DEV_STATE_OFFLINE) &&
611 (cdev->private->state != DEV_STATE_BOXED))
612 return -EINVAL;
613 sch = to_subchannel(cdev->dev.parent);
edf22096 614 ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
1da177e4
LT		 615 if (ret != 0) {
616 /* Couldn't enable the subchannel for i/o. Sick device. */
617 if (ret == -ENODEV)
618 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
619 return ret;
620 }
621 /* Do we want to do path grouping? */
622 if (!cdev->private->options.pgroup) {
7e560814
CH		 623 /* Start initial path verification. */
624 cdev->private->state = DEV_STATE_VERIFY;
28bdc6f6 625 cdev->private->flags.doverify = 0;
7e560814 626 ccw_device_verify_start(cdev);
1da177e4
LT		 627 return 0;
628 }
629 /* Do a SensePGID first. */
630 cdev->private->state = DEV_STATE_SENSE_PGID;
631 ccw_device_sense_pgid_start(cdev);
632 return 0;
633}
634
635void
636ccw_device_disband_done(struct ccw_device *cdev, int err)
637{
638 switch (err) {
639 case 0:
640 ccw_device_done(cdev, DEV_STATE_OFFLINE);
641 break;
642 case -ETIME:
643 ccw_device_done(cdev, DEV_STATE_BOXED);
644 break;
645 default:
3ecb0a5a 646 cdev->private->flags.donotify = 0;
3f4cf6e7 647 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
1da177e4
LT		 648 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
649 break;
650 }
651}
652
653/*
654 * Shutdown device.
655 */
656int
657ccw_device_offline(struct ccw_device *cdev)
658{
659 struct subchannel *sch;
660
b301ea8c
PO		 661 /* Allow ccw_device_offline while disconnected. */
662 if (cdev->private->state == DEV_STATE_DISCONNECTED ||
663 cdev->private->state == DEV_STATE_NOT_OPER) {
664 cdev->private->flags.donotify = 0;
665 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
666 return 0;
667 }
102e835d
PO		 668 if (cdev->private->state == DEV_STATE_BOXED) {
669 ccw_device_done(cdev, DEV_STATE_BOXED);
670 return 0;
671 }
d7b5a4c9
CH		 672 if (ccw_device_is_orphan(cdev)) {
673 ccw_device_done(cdev, DEV_STATE_OFFLINE);
674 return 0;
675 }
1da177e4 676 sch = to_subchannel(cdev->dev.parent);
cdb912a4 677 if (cio_update_schib(sch))
1da177e4 678 return -ENODEV;
23d805b6 679 if (scsw_actl(&sch->schib.scsw) != 0)
1da177e4 680 return -EBUSY;
23d805b6
PO		 681 if (cdev->private->state != DEV_STATE_ONLINE)
682 return -EINVAL;
1da177e4
LT		 683 /* Are we doing path grouping? */
684 if (!cdev->private->options.pgroup) {
685 /* No, set state offline immediately. */
686 ccw_device_done(cdev, DEV_STATE_OFFLINE);
687 return 0;
688 }
689 /* Start Set Path Group commands. */
690 cdev->private->state = DEV_STATE_DISBAND_PGID;
691 ccw_device_disband_start(cdev);
692 return 0;
693}
694
695/*
696 * Handle timeout in device online/offline process.
697 */
698static void
699ccw_device_onoff_timeout(struct ccw_device *cdev, enum dev_event dev_event)
700{
701 int ret;
702
703 ret = ccw_device_cancel_halt_clear(cdev);
704 switch (ret) {
705 case 0:
706 ccw_device_done(cdev, DEV_STATE_BOXED);
707 break;
708 case -ENODEV:
709 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
710 break;
711 default:
712 ccw_device_set_timeout(cdev, 3*HZ);
713 }
714}
715
716/*
717 * Handle not oper event in device recognition.
718 */
719static void
720ccw_device_recog_notoper(struct ccw_device *cdev, enum dev_event dev_event)
721{
722 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
723}
724
725/*
3f4cf6e7 726 * Handle not operational event in non-special state.
1da177e4 727 */
3f4cf6e7
CH		 728static void ccw_device_generic_notoper(struct ccw_device *cdev,
729 enum dev_event dev_event)
1da177e4 730{
6afcc775 731 if (!ccw_device_notify(cdev, CIO_GONE))
37de53bb 732 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
6afcc775
PO		 733 else
734 ccw_device_set_disconnected(cdev);
1da177e4
LT		 735}
736
1f1148c8
PO		 737/*
738 * Handle path verification event in offline state.
739 */
740static void ccw_device_offline_verify(struct ccw_device *cdev,
741 enum dev_event dev_event)
742{
743 struct subchannel *sch = to_subchannel(cdev->dev.parent);
744
745 css_schedule_eval(sch->schid);
746}
747
1da177e4
LT		 748/*
749 * Handle path verification event.
750 */
751static void
752ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
753{
754 struct subchannel *sch;
755
1da177e4
LT		 756 if (cdev->private->state == DEV_STATE_W4SENSE) {
757 cdev->private->flags.doverify = 1;
758 return;
759 }
760 sch = to_subchannel(cdev->dev.parent);
761 /*
762 * Since we might not just be coming from an interrupt from the
763 * subchannel we have to update the schib.
764 */
cdb912a4
SO		 765 if (cio_update_schib(sch)) {
766 ccw_device_verify_done(cdev, -ENODEV);
767 return;
768 }
1da177e4 769
23d805b6
PO		 770 if (scsw_actl(&sch->schib.scsw) != 0 ||
771 (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
772 (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) {
1da177e4
LT		 773 /*
774 * No final status yet or final status not yet delivered
775 * to the device driver. Can't do path verfication now,
776 * delay until final status was delivered.
777 */
778 cdev->private->flags.doverify = 1;
779 return;
780 }
781 /* Device is idle, we can do the path verification. */
782 cdev->private->state = DEV_STATE_VERIFY;
28bdc6f6 783 cdev->private->flags.doverify = 0;
1da177e4
LT		 784 ccw_device_verify_start(cdev);
785}
786
787/*
788 * Got an interrupt for a normal io (state online).
789 */
790static void
791ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
792{
793 struct irb *irb;
83262d63 794 int is_cmd;
1da177e4
LT		 795
796 irb = (struct irb *) __LC_IRB;
83262d63 797 is_cmd = !scsw_is_tm(&irb->scsw);
1da177e4 798 /* Check for unsolicited interrupt. */
23d805b6 799 if (!scsw_is_solicited(&irb->scsw)) {
83262d63 800 if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
1da177e4
LT		 801 !irb->esw.esw0.erw.cons) {
802 /* Unit check but no sense data. Need basic sense. */
803 if (ccw_device_do_sense(cdev, irb) != 0)
804 goto call_handler_unsol;
e0ec5749 805 memcpy(&cdev->private->irb, irb, sizeof(struct irb));
1da177e4
LT		 806 cdev->private->state = DEV_STATE_W4SENSE;
807 cdev->private->intparm = 0;
808 return;
809 }
810call_handler_unsol:
811 if (cdev->handler)
812 cdev->handler (cdev, 0, irb);
18374d37
CH		 813 if (cdev->private->flags.doverify)
814 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 815 return;
816 }
817 /* Accumulate status and find out if a basic sense is needed. */
818 ccw_device_accumulate_irb(cdev, irb);
83262d63 819 if (is_cmd && cdev->private->flags.dosense) {
1da177e4
LT		 820 if (ccw_device_do_sense(cdev, irb) == 0) {
821 cdev->private->state = DEV_STATE_W4SENSE;
822 }
823 return;
824 }
825 /* Call the handler. */
826 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
827 /* Start delayed path verification. */
828 ccw_device_online_verify(cdev, 0);
829}
830
831/*
832 * Got an timeout in online state.
833 */
834static void
835ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
836{
837 int ret;
838
839 ccw_device_set_timeout(cdev, 0);
840 ret = ccw_device_cancel_halt_clear(cdev);
841 if (ret == -EBUSY) {
842 ccw_device_set_timeout(cdev, 3*HZ);
843 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
844 return;
845 }
3f4cf6e7
CH		 846 if (ret == -ENODEV)
847 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
848 else if (cdev->handler)
1da177e4
LT		 849 cdev->handler(cdev, cdev->private->intparm,
850 ERR_PTR(-ETIMEDOUT));
851}
852
853/*
854 * Got an interrupt for a basic sense.
855 */
2b67fc46 856static void
1da177e4
LT		 857ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
858{
859 struct irb *irb;
860
861 irb = (struct irb *) __LC_IRB;
862 /* Check for unsolicited interrupt. */
23d805b6
PO		 863 if (scsw_stctl(&irb->scsw) ==
864 (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
865 if (scsw_cc(&irb->scsw) == 1)
1da177e4
LT		 866 /* Basic sense hasn't started. Try again. */
867 ccw_device_do_sense(cdev, irb);
868 else {
139b83dd 869 CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited "
e556bbbd
CH		 870 "interrupt during w4sense...\n",
871 cdev->private->dev_id.ssid,
872 cdev->private->dev_id.devno);
1da177e4
LT		 873 if (cdev->handler)
874 cdev->handler (cdev, 0, irb);
875 }
876 return;
877 }
3ba1998e
CH		 878 /*
879 * Check if a halt or clear has been issued in the meanwhile. If yes,
880 * only deliver the halt/clear interrupt to the device driver as if it
881 * had killed the original request.
882 */
23d805b6
PO		 883 if (scsw_fctl(&irb->scsw) &
884 (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
d23861ff
CH		 885 /* Retry Basic Sense if requested. */
886 if (cdev->private->flags.intretry) {
887 cdev->private->flags.intretry = 0;
888 ccw_device_do_sense(cdev, irb);
889 return;
890 }
3ba1998e
CH		 891 cdev->private->flags.dosense = 0;
892 memset(&cdev->private->irb, 0, sizeof(struct irb));
893 ccw_device_accumulate_irb(cdev, irb);
894 goto call_handler;
895 }
1da177e4
LT		 896 /* Add basic sense info to irb. */
897 ccw_device_accumulate_basic_sense(cdev, irb);
898 if (cdev->private->flags.dosense) {
899 /* Another basic sense is needed. */
900 ccw_device_do_sense(cdev, irb);
901 return;
902 }
3ba1998e 903call_handler:
1da177e4 904 cdev->private->state = DEV_STATE_ONLINE;
217ee6c6
ME		 905 /* In case sensing interfered with setting the device online */
906 wake_up(&cdev->private->wait_q);
1da177e4
LT		 907 /* Call the handler. */
908 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
909 /* Start delayed path verification. */
910 ccw_device_online_verify(cdev, 0);
911}
912
913static void
914ccw_device_clear_verify(struct ccw_device *cdev, enum dev_event dev_event)
915{
916 struct irb *irb;
917
918 irb = (struct irb *) __LC_IRB;
919 /* Accumulate status. We don't do basic sense. */
920 ccw_device_accumulate_irb(cdev, irb);
b4f7b1ee
CH		 921 /* Remember to clear irb to avoid residuals. */
922 memset(&cdev->private->irb, 0, sizeof(struct irb));
1da177e4
LT		 923 /* Try to start delayed device verification. */
924 ccw_device_online_verify(cdev, 0);
925 /* Note: Don't call handler for cio initiated clear! */
926}
927
928static void
929ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
930{
931 struct subchannel *sch;
932
933 sch = to_subchannel(cdev->dev.parent);
934 ccw_device_set_timeout(cdev, 0);
7c8427c3
CH		 935 /* Start delayed path verification. */
936 ccw_device_online_verify(cdev, 0);
1da177e4 937 /* OK, i/o is dead now. Call interrupt handler. */
1da177e4
LT		 938 if (cdev->handler)
939 cdev->handler(cdev, cdev->private->intparm,
e7769b48 940 ERR_PTR(-EIO));
1da177e4
LT		 941}
942
943static void
944ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
945{
946 int ret;
947
948 ret = ccw_device_cancel_halt_clear(cdev);
949 if (ret == -EBUSY) {
950 ccw_device_set_timeout(cdev, 3*HZ);
951 return;
952 }
7c8427c3
CH		 953 /* Start delayed path verification. */
954 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 955 if (cdev->handler)
956 cdev->handler(cdev, cdev->private->intparm,
e7769b48 957 ERR_PTR(-EIO));
1da177e4
LT		 958}
959
c820de39 960void ccw_device_kill_io(struct ccw_device *cdev)
1da177e4
LT		 961{
962 int ret;
1da177e4 963
1da177e4
LT		 964 ret = ccw_device_cancel_halt_clear(cdev);
965 if (ret == -EBUSY) {
966 ccw_device_set_timeout(cdev, 3*HZ);
967 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
968 return;
969 }
7c8427c3
CH		 970 /* Start delayed path verification. */
971 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 972 if (cdev->handler)
973 cdev->handler(cdev, cdev->private->intparm,
e7769b48 974 ERR_PTR(-EIO));
1da177e4
LT		 975}
976
977static void
28bdc6f6 978ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1da177e4 979{
28bdc6f6 980 /* Start verification after current task finished. */
7e560814 981 cdev->private->flags.doverify = 1;
1da177e4
LT		 982}
983
984static void
985ccw_device_stlck_done(struct ccw_device *cdev, enum dev_event dev_event)
986{
987 struct irb *irb;
988
989 switch (dev_event) {
990 case DEV_EVENT_INTERRUPT:
991 irb = (struct irb *) __LC_IRB;
992 /* Check for unsolicited interrupt. */
23d805b6 993 if ((scsw_stctl(&irb->scsw) ==
1da177e4 994 (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) &&
23d805b6 995 (!scsw_cc(&irb->scsw)))
1da177e4
LT		 996 /* FIXME: we should restart stlck here, but this
997 * is extremely unlikely ... */
998 goto out_wakeup;
999
1000 ccw_device_accumulate_irb(cdev, irb);
1001 /* We don't care about basic sense etc. */
1002 break;
1003 default: /* timeout */
1004 break;
1005 }
1006out_wakeup:
1007 wake_up(&cdev->private->wait_q);
1008}
1009
1010static void
1011ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
1012{
1013 struct subchannel *sch;
1014
1015 sch = to_subchannel(cdev->dev.parent);
edf22096 1016 if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0)
1da177e4
LT		 1017 /* Couldn't enable the subchannel for i/o. Sick device. */
1018 return;
1019
1020 /* After 60s the device recognition is considered to have failed. */
1021 ccw_device_set_timeout(cdev, 60*HZ);
1022
1023 cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
1024 ccw_device_sense_id_start(cdev);
1025}
1026
c820de39 1027void ccw_device_trigger_reprobe(struct ccw_device *cdev)
1da177e4 1028{
c820de39 1029 struct subchannel *sch;
1da177e4 1030
1da177e4
LT		 1031 if (cdev->private->state != DEV_STATE_DISCONNECTED)
1032 return;
1033
c820de39 1034 sch = to_subchannel(cdev->dev.parent);
1da177e4 1035 /* Update some values. */
cdb912a4 1036 if (cio_update_schib(sch))
7674da77 1037 return;
1da177e4
LT		 1038 /*
1039 * The pim, pam, pom values may not be accurate, but they are the best
1040 * we have before performing device selection :/
1041 */
28bdc6f6 1042 sch->lpm = sch->schib.pmcw.pam & sch->opm;
13952ec1
SO		 1043 /*
1044 * Use the initial configuration since we can't be shure that the old
1045 * paths are valid.
1046 */
1047 io_subchannel_init_config(sch);
f444cc0e
SO		 1048 if (cio_commit_config(sch))
1049 return;
13952ec1 1050
1da177e4 1051 /* We should also udate ssd info, but this has to wait. */
d7b5a4c9 1052 /* Check if this is another device which appeared on the same sch. */
5d6e6b6f
PO		 1053 if (sch->schib.pmcw.dev != cdev->private->dev_id.devno)
1054 css_schedule_eval(sch->schid);
1055 else
d7b5a4c9 1056 ccw_device_start_id(cdev, 0);
1da177e4
LT		 1057}
1058
1059static void
1060ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event)
1061{
1062 struct subchannel *sch;
1063
1064 sch = to_subchannel(cdev->dev.parent);
1065 /*
1066 * An interrupt in state offline means a previous disable was not
ed04b892 1067 * successful - should not happen, but we try to disable again.
1da177e4
LT		 1068 */
1069 cio_disable_subchannel(sch);
1070}
1071
1072static void
1073ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
1074{
1075 retry_set_schib(cdev);
1076 cdev->private->state = DEV_STATE_ONLINE;
1077 dev_fsm_event(cdev, dev_event);
1078}
1079
94bb0633
CH		 1080static void ccw_device_update_cmfblock(struct ccw_device *cdev,
1081 enum dev_event dev_event)
1082{
1083 cmf_retry_copy_block(cdev);
1084 cdev->private->state = DEV_STATE_ONLINE;
1085 dev_fsm_event(cdev, dev_event);
1086}
1da177e4
LT		 1087
1088static void
1089ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1090{
1091 ccw_device_set_timeout(cdev, 0);
1092 if (dev_event == DEV_EVENT_NOTOPER)
1093 cdev->private->state = DEV_STATE_NOT_OPER;
1094 else
1095 cdev->private->state = DEV_STATE_OFFLINE;
1096 wake_up(&cdev->private->wait_q);
1097}
1098
1099static void
1100ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1101{
1102 int ret;
1103
1104 ret = ccw_device_cancel_halt_clear(cdev);
1105 switch (ret) {
1106 case 0:
1107 cdev->private->state = DEV_STATE_OFFLINE;
1108 wake_up(&cdev->private->wait_q);
1109 break;
1110 case -ENODEV:
1111 cdev->private->state = DEV_STATE_NOT_OPER;
1112 wake_up(&cdev->private->wait_q);
1113 break;
1114 default:
1115 ccw_device_set_timeout(cdev, HZ/10);
1116 }
1117}
1118
1119/*
1120 * No operation action. This is used e.g. to ignore a timeout event in
1121 * state offline.
1122 */
1123static void
1124ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1125{
1126}
1127
1128/*
1129 * Bug operation action.
1130 */
1131static void
1132ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
1133{
139b83dd
ME		 1134 CIO_MSG_EVENT(0, "Internal state [%i][%i] not handled for device "
1135 "0.%x.%04x\n", cdev->private->state, dev_event,
1136 cdev->private->dev_id.ssid,
1137 cdev->private->dev_id.devno);
1da177e4
LT		 1138 BUG();
1139}
1140
1141/*
1142 * device statemachine
1143 */
1144fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1145 [DEV_STATE_NOT_OPER] = {
1146 [DEV_EVENT_NOTOPER] = ccw_device_nop,
1147 [DEV_EVENT_INTERRUPT] = ccw_device_bug,
1148 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1149 [DEV_EVENT_VERIFY] = ccw_device_nop,
1150 },
1151 [DEV_STATE_SENSE_PGID] = {
3f4cf6e7 1152 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1153 [DEV_EVENT_INTERRUPT] = ccw_device_sense_pgid_irq,
1154 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
1155 [DEV_EVENT_VERIFY] = ccw_device_nop,
1156 },
1157 [DEV_STATE_SENSE_ID] = {
1158 [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper,
1159 [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq,
1160 [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout,
1161 [DEV_EVENT_VERIFY] = ccw_device_nop,
1162 },
1163 [DEV_STATE_OFFLINE] = {
3f4cf6e7 1164 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1165 [DEV_EVENT_INTERRUPT] = ccw_device_offline_irq,
1166 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1f1148c8 1167 [DEV_EVENT_VERIFY] = ccw_device_offline_verify,
1da177e4
LT		 1168 },
1169 [DEV_STATE_VERIFY] = {
3f4cf6e7 1170 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1171 [DEV_EVENT_INTERRUPT] = ccw_device_verify_irq,
1172 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
28bdc6f6 1173 [DEV_EVENT_VERIFY] = ccw_device_delay_verify,
1da177e4
LT		 1174 },
1175 [DEV_STATE_ONLINE] = {
3f4cf6e7 1176 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1177 [DEV_EVENT_INTERRUPT] = ccw_device_irq,
1178 [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout,
1179 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1180 },
1181 [DEV_STATE_W4SENSE] = {
3f4cf6e7 1182 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1183 [DEV_EVENT_INTERRUPT] = ccw_device_w4sense,
1184 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1185 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1186 },
1187 [DEV_STATE_DISBAND_PGID] = {
3f4cf6e7 1188 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1189 [DEV_EVENT_INTERRUPT] = ccw_device_disband_irq,
1190 [DEV_EVENT_TIMEOUT] = ccw_device_onoff_timeout,
1191 [DEV_EVENT_VERIFY] = ccw_device_nop,
1192 },
1193 [DEV_STATE_BOXED] = {
3f4cf6e7 1194 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1195 [DEV_EVENT_INTERRUPT] = ccw_device_stlck_done,
1196 [DEV_EVENT_TIMEOUT] = ccw_device_stlck_done,
1197 [DEV_EVENT_VERIFY] = ccw_device_nop,
1198 },
1199 /* states to wait for i/o completion before doing something */
1200 [DEV_STATE_CLEAR_VERIFY] = {
3f4cf6e7 1201 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1202 [DEV_EVENT_INTERRUPT] = ccw_device_clear_verify,
1203 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1204 [DEV_EVENT_VERIFY] = ccw_device_nop,
1205 },
1206 [DEV_STATE_TIMEOUT_KILL] = {
3f4cf6e7 1207 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1208 [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq,
1209 [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout,
1210 [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME
1211 },
1da177e4
LT		 1212 [DEV_STATE_QUIESCE] = {
1213 [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done,
1214 [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done,
1215 [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout,
1216 [DEV_EVENT_VERIFY] = ccw_device_nop,
1217 },
1218 /* special states for devices gone not operational */
1219 [DEV_STATE_DISCONNECTED] = {
1220 [DEV_EVENT_NOTOPER] = ccw_device_nop,
1221 [DEV_EVENT_INTERRUPT] = ccw_device_start_id,
1222 [DEV_EVENT_TIMEOUT] = ccw_device_bug,
28bdc6f6 1223 [DEV_EVENT_VERIFY] = ccw_device_start_id,
1da177e4
LT		 1224 },
1225 [DEV_STATE_DISCONNECTED_SENSE_ID] = {
1226 [DEV_EVENT_NOTOPER] = ccw_device_recog_notoper,
1227 [DEV_EVENT_INTERRUPT] = ccw_device_sense_id_irq,
1228 [DEV_EVENT_TIMEOUT] = ccw_device_recog_timeout,
1229 [DEV_EVENT_VERIFY] = ccw_device_nop,
1230 },
1231 [DEV_STATE_CMFCHANGE] = {
1232 [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate,
1233 [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate,
1234 [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate,
1235 [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate,
1236 },
94bb0633
CH		 1237 [DEV_STATE_CMFUPDATE] = {
1238 [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock,
1239 [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock,
1240 [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock,
1241 [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock,
1242 },
1da177e4
LT		 1243};
1244
1da177e4 1245EXPORT_SYMBOL_GPL(ccw_device_set_timeout);
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