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Merge tag 'iwlwifi-next-for-kalle-2016-03-02' of https://git.kernel.org/pub/scm/linux...
[linux-2.6-block.git] / drivers / s390 / cio / device_fsm.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * finite state machine for device handling
3 *
a53c8fab 4 * Copyright IBM Corp. 2002, 2008
4ce3b30c 5 * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
1da177e4
LT		 6 * Martin Schwidefsky (schwidefsky@de.ibm.com)
7 */
8
9#include <linux/module.h>
1da177e4 10#include <linux/init.h>
4e57b681
TS		 11#include <linux/jiffies.h>
12#include <linux/string.h>
1da177e4
LT		 13
14#include <asm/ccwdev.h>
4c24da79 15#include <asm/cio.h>
e5854a58 16#include <asm/chpid.h>
1da177e4
LT		 17
18#include "cio.h"
19#include "cio_debug.h"
20#include "css.h"
21#include "device.h"
22#include "chsc.h"
23#include "ioasm.h"
e6b6e10a 24#include "chp.h"
1da177e4 25
14ff56bb
SO		 26static int timeout_log_enabled;
27
14ff56bb
SO		 28static int __init ccw_timeout_log_setup(char *unused)
29{
30 timeout_log_enabled = 1;
31 return 1;
32}
33
34__setup("ccw_timeout_log", ccw_timeout_log_setup);
35
36static void ccw_timeout_log(struct ccw_device *cdev)
37{
38 struct schib schib;
39 struct subchannel *sch;
cd6b4f27 40 struct io_subchannel_private *private;
83262d63 41 union orb *orb;
14ff56bb
SO		 42 int cc;
43
44 sch = to_subchannel(cdev->dev.parent);
cd6b4f27 45 private = to_io_private(sch);
83262d63 46 orb = &private->orb;
62e65da9 47 cc = stsch(sch->schid, &schib);
14ff56bb
SO		 48
49 printk(KERN_WARNING "cio: ccw device timeout occurred at %llx, "
1aae0560 50 "device information:\n", get_tod_clock());
14ff56bb
SO		 51 printk(KERN_WARNING "cio: orb:\n");
52 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
83262d63 53 orb, sizeof(*orb), 0);
2a0217d5
KS		 54 printk(KERN_WARNING "cio: ccw device bus id: %s\n",
55 dev_name(&cdev->dev));
56 printk(KERN_WARNING "cio: subchannel bus id: %s\n",
57 dev_name(&sch->dev));
14ff56bb
SO		 58 printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, "
59 "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm);
60
83262d63
PO		 61 if (orb->tm.b) {
62 printk(KERN_WARNING "cio: orb indicates transport mode\n");
63 printk(KERN_WARNING "cio: last tcw:\n");
64 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
65 (void *)(addr_t)orb->tm.tcw,
66 sizeof(struct tcw), 0);
67 } else {
68 printk(KERN_WARNING "cio: orb indicates command mode\n");
69 if ((void *)(addr_t)orb->cmd.cpa == &private->sense_ccw ||
70 (void *)(addr_t)orb->cmd.cpa == cdev->private->iccws)
71 printk(KERN_WARNING "cio: last channel program "
72 "(intern):\n");
73 else
74 printk(KERN_WARNING "cio: last channel program:\n");
75
76 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
77 (void *)(addr_t)orb->cmd.cpa,
78 sizeof(struct ccw1), 0);
79 }
14ff56bb
SO		 80 printk(KERN_WARNING "cio: ccw device state: %d\n",
81 cdev->private->state);
82 printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc);
83 printk(KERN_WARNING "cio: schib:\n");
84 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
85 &schib, sizeof(schib), 0);
86 printk(KERN_WARNING "cio: ccw device flags:\n");
87 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
88 &cdev->private->flags, sizeof(cdev->private->flags), 0);
89}
90
1da177e4
LT		 91/*
92 * Timeout function. It just triggers a DEV_EVENT_TIMEOUT.
93 */
94static void
95ccw_device_timeout(unsigned long data)
96{
97 struct ccw_device *cdev;
98
99 cdev = (struct ccw_device *) data;
100 spin_lock_irq(cdev->ccwlock);
14ff56bb
SO		 101 if (timeout_log_enabled)
102 ccw_timeout_log(cdev);
1da177e4
LT		 103 dev_fsm_event(cdev, DEV_EVENT_TIMEOUT);
104 spin_unlock_irq(cdev->ccwlock);
105}
106
107/*
108 * Set timeout
109 */
110void
111ccw_device_set_timeout(struct ccw_device *cdev, int expires)
112{
113 if (expires == 0) {
114 del_timer(&cdev->private->timer);
115 return;
116 }
117 if (timer_pending(&cdev->private->timer)) {
118 if (mod_timer(&cdev->private->timer, jiffies + expires))
119 return;
120 }
121 cdev->private->timer.function = ccw_device_timeout;
122 cdev->private->timer.data = (unsigned long) cdev;
123 cdev->private->timer.expires = jiffies + expires;
124 add_timer(&cdev->private->timer);
125}
126
1da177e4
LT		 127/*
128 * Cancel running i/o. This is called repeatedly since halt/clear are
129 * asynchronous operations. We do one try with cio_cancel, two tries
130 * with cio_halt, 255 tries with cio_clear. If everythings fails panic.
131 * Returns 0 if device now idle, -ENODEV for device not operational and
132 * -EBUSY if an interrupt is expected (either from halt/clear or from a
133 * status pending).
134 */
135int
136ccw_device_cancel_halt_clear(struct ccw_device *cdev)
137{
138 struct subchannel *sch;
139 int ret;
140
141 sch = to_subchannel(cdev->dev.parent);
cdb912a4 142 if (cio_update_schib(sch))
1da177e4 143 return -ENODEV;
2470b648
CH		 144 if (!sch->schib.pmcw.ena)
145 /* Not operational -> done. */
1da177e4
LT		 146 return 0;
147 /* Stage 1: cancel io. */
23d805b6
PO		 148 if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_HALT_PEND) &&
149 !(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
83262d63
PO		 150 if (!scsw_is_tm(&sch->schib.scsw)) {
151 ret = cio_cancel(sch);
152 if (ret != -EINVAL)
153 return ret;
154 }
155 /* cancel io unsuccessful or not applicable (transport mode).
156 * Continue with asynchronous instructions. */
1da177e4
LT		 157 cdev->private->iretry = 3; /* 3 halt retries. */
158 }
23d805b6 159 if (!(scsw_actl(&sch->schib.scsw) & SCSW_ACTL_CLEAR_PEND)) {
1da177e4
LT		 160 /* Stage 2: halt io. */
161 if (cdev->private->iretry) {
162 cdev->private->iretry--;
163 ret = cio_halt(sch);
ba4ba8a6
PO		 164 if (ret != -EBUSY)
165 return (ret == 0) ? -EBUSY : ret;
1da177e4
LT		 166 }
167 /* halt io unsuccessful. */
168 cdev->private->iretry = 255; /* 255 clear retries. */
169 }
170 /* Stage 3: clear io. */
171 if (cdev->private->iretry) {
172 cdev->private->iretry--;
173 ret = cio_clear (sch);
174 return (ret == 0) ? -EBUSY : ret;
175 }
376ae475
PO		 176 /* Function was unsuccessful */
177 CIO_MSG_EVENT(0, "0.%x.%04x: could not stop I/O\n",
178 cdev->private->dev_id.ssid, cdev->private->dev_id.devno);
179 return -EIO;
1da177e4
LT		 180}
181
823d494a 182void ccw_device_update_sense_data(struct ccw_device *cdev)
1da177e4 183{
823d494a
SO		 184 memset(&cdev->id, 0, sizeof(cdev->id));
185 cdev->id.cu_type = cdev->private->senseid.cu_type;
186 cdev->id.cu_model = cdev->private->senseid.cu_model;
187 cdev->id.dev_type = cdev->private->senseid.dev_type;
188 cdev->id.dev_model = cdev->private->senseid.dev_model;
189}
1da177e4 190
823d494a
SO		 191int ccw_device_test_sense_data(struct ccw_device *cdev)
192{
193 return cdev->id.cu_type == cdev->private->senseid.cu_type &&
194 cdev->id.cu_model == cdev->private->senseid.cu_model &&
195 cdev->id.dev_type == cdev->private->senseid.dev_type &&
196 cdev->id.dev_model == cdev->private->senseid.dev_model;
1da177e4
LT		 197}
198
199/*
200 * The machine won't give us any notification by machine check if a chpid has
201 * been varied online on the SE so we have to find out by magic (i. e. driving
202 * the channel subsystem to device selection and updating our path masks).
203 */
4d284cac 204static void
1da177e4
LT		 205__recover_lost_chpids(struct subchannel *sch, int old_lpm)
206{
207 int mask, i;
f86635fa 208 struct chp_id chpid;
1da177e4 209
f86635fa 210 chp_id_init(&chpid);
1da177e4
LT		 211 for (i = 0; i<8; i++) {
212 mask = 0x80 >> i;
213 if (!(sch->lpm & mask))
214 continue;
215 if (old_lpm & mask)
216 continue;
f86635fa 217 chpid.id = sch->schib.pmcw.chpid[i];
83b3370c
PO		 218 if (!chp_is_registered(chpid))
219 css_schedule_eval_all();
1da177e4
LT		 220 }
221}
222
223/*
224 * Stop device recognition.
225 */
226static void
227ccw_device_recog_done(struct ccw_device *cdev, int state)
228{
229 struct subchannel *sch;
823d494a 230 int old_lpm;
1da177e4
LT		 231
232 sch = to_subchannel(cdev->dev.parent);
233
ec64333c
SO		 234 if (cio_disable_subchannel(sch))
235 state = DEV_STATE_NOT_OPER;
1da177e4
LT		 236 /*
237 * Now that we tried recognition, we have performed device selection
238 * through ssch() and the path information is up to date.
239 */
240 old_lpm = sch->lpm;
cdb912a4 241
4ffa9234 242 /* Check since device may again have become not operational. */
cdb912a4 243 if (cio_update_schib(sch))
4ffa9234 244 state = DEV_STATE_NOT_OPER;
cdb912a4
SO		 245 else
246 sch->lpm = sch->schib.pmcw.pam & sch->opm;
247
1da177e4
LT		 248 if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID)
249 /* Force reprobe on all chpids. */
250 old_lpm = 0;
251 if (sch->lpm != old_lpm)
252 __recover_lost_chpids(sch, old_lpm);
47593bfa
SO		 253 if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID &&
254 (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) {
255 cdev->private->flags.recog_done = 1;
256 cdev->private->state = DEV_STATE_DISCONNECTED;
257 wake_up(&cdev->private->wait_q);
258 return;
1da177e4 259 }
823d494a
SO		 260 if (cdev->private->flags.resuming) {
261 cdev->private->state = state;
262 cdev->private->flags.recog_done = 1;
263 wake_up(&cdev->private->wait_q);
264 return;
265 }
1da177e4
LT		 266 switch (state) {
267 case DEV_STATE_NOT_OPER:
1da177e4
LT		 268 break;
269 case DEV_STATE_OFFLINE:
823d494a
SO		 270 if (!cdev->online) {
271 ccw_device_update_sense_data(cdev);
823d494a 272 break;
1da177e4 273 }
823d494a
SO		 274 cdev->private->state = DEV_STATE_OFFLINE;
275 cdev->private->flags.recog_done = 1;
276 if (ccw_device_test_sense_data(cdev)) {
277 cdev->private->flags.donotify = 1;
278 ccw_device_online(cdev);
279 wake_up(&cdev->private->wait_q);
280 } else {
281 ccw_device_update_sense_data(cdev);
37de53bb 282 ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
1da177e4 283 }
823d494a 284 return;
1da177e4 285 case DEV_STATE_BOXED:
47593bfa
SO		 286 if (cdev->id.cu_type != 0) { /* device was recognized before */
287 cdev->private->flags.recog_done = 1;
288 cdev->private->state = DEV_STATE_BOXED;
289 wake_up(&cdev->private->wait_q);
290 return;
291 }
1da177e4
LT		 292 break;
293 }
294 cdev->private->state = state;
295 io_subchannel_recog_done(cdev);
156013ff 296 wake_up(&cdev->private->wait_q);
1da177e4
LT		 297}
298
299/*
300 * Function called from device_id.c after sense id has completed.
301 */
302void
303ccw_device_sense_id_done(struct ccw_device *cdev, int err)
304{
305 switch (err) {
306 case 0:
307 ccw_device_recog_done(cdev, DEV_STATE_OFFLINE);
308 break;
309 case -ETIME: /* Sense id stopped by timeout. */
310 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
311 break;
312 default:
313 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
314 break;
315 }
316}
317
76e6fb4b
SO		 318/**
319 * ccw_device_notify() - inform the device's driver about an event
25985edc 320 * @cdev: device for which an event occurred
76e6fb4b
SO		 321 * @event: event that occurred
322 *
323 * Returns:
324 * -%EINVAL if the device is offline or has no driver.
325 * -%EOPNOTSUPP if the device's driver has no notifier registered.
326 * %NOTIFY_OK if the driver wants to keep the device.
327 * %NOTIFY_BAD if the driver doesn't want to keep the device.
328 */
c820de39
CH		 329int ccw_device_notify(struct ccw_device *cdev, int event)
330{
76e6fb4b
SO		 331 int ret = -EINVAL;
332
c820de39 333 if (!cdev->drv)
76e6fb4b 334 goto out;
c820de39 335 if (!cdev->online)
76e6fb4b 336 goto out;
91c36919
PO		 337 CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n",
338 cdev->private->dev_id.ssid, cdev->private->dev_id.devno,
339 event);
76e6fb4b
SO		 340 if (!cdev->drv->notify) {
341 ret = -EOPNOTSUPP;
342 goto out;
343 }
344 if (cdev->drv->notify(cdev, event))
345 ret = NOTIFY_OK;
346 else
347 ret = NOTIFY_BAD;
348out:
349 return ret;
c820de39
CH		 350}
351
91c36919
PO		 352static void ccw_device_oper_notify(struct ccw_device *cdev)
353{
585b954e
SO		 354 struct subchannel *sch = to_subchannel(cdev->dev.parent);
355
76e6fb4b 356 if (ccw_device_notify(cdev, CIO_OPER) == NOTIFY_OK) {
94bb0633 357 /* Reenable channel measurements, if needed. */
37de53bb 358 ccw_device_sched_todo(cdev, CDEV_TODO_ENABLE_CMF);
585b954e
SO		 359 /* Save indication for new paths. */
360 cdev->private->path_new_mask = sch->vpm;
91c36919
PO		 361 return;
362 }
363 /* Driver doesn't want device back. */
364 ccw_device_set_notoper(cdev);
37de53bb 365 ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
1da177e4
LT		 366}
367
368/*
369 * Finished with online/offline processing.
370 */
371static void
372ccw_device_done(struct ccw_device *cdev, int state)
373{
374 struct subchannel *sch;
375
376 sch = to_subchannel(cdev->dev.parent);
377
f1ee3281
CH		 378 ccw_device_set_timeout(cdev, 0);
379
1da177e4
LT		 380 if (state != DEV_STATE_ONLINE)
381 cio_disable_subchannel(sch);
382
383 /* Reset device status. */
384 memset(&cdev->private->irb, 0, sizeof(struct irb));
385
386 cdev->private->state = state;
387
9a332116
PO		 388 switch (state) {
389 case DEV_STATE_BOXED:
139b83dd
ME		 390 CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
391 cdev->private->dev_id.devno, sch->schid.sch_no);
76e6fb4b
SO		 392 if (cdev->online &&
393 ccw_device_notify(cdev, CIO_BOXED) != NOTIFY_OK)
37de53bb 394 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
47593bfa 395 cdev->private->flags.donotify = 0;
9a332116
PO		 396 break;
397 case DEV_STATE_NOT_OPER:
626e476a
SO		 398 CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n",
399 cdev->private->dev_id.devno, sch->schid.sch_no);
76e6fb4b 400 if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK)
37de53bb 401 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
6afcc775
PO		 402 else
403 ccw_device_set_disconnected(cdev);
626e476a 404 cdev->private->flags.donotify = 0;
9a332116
PO		 405 break;
406 case DEV_STATE_DISCONNECTED:
407 CIO_MSG_EVENT(0, "Disconnected device %04x on subchannel "
408 "%04x\n", cdev->private->dev_id.devno,
409 sch->schid.sch_no);
9bf05098
SO		 410 if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK) {
411 cdev->private->state = DEV_STATE_NOT_OPER;
37de53bb 412 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
9bf05098 413 } else
9a332116
PO		 414 ccw_device_set_disconnected(cdev);
415 cdev->private->flags.donotify = 0;
416 break;
417 default:
418 break;
626e476a 419 }
1da177e4
LT		 420
421 if (cdev->private->flags.donotify) {
422 cdev->private->flags.donotify = 0;
91c36919 423 ccw_device_oper_notify(cdev);
1da177e4
LT		 424 }
425 wake_up(&cdev->private->wait_q);
1da177e4
LT		 426}
427
1da177e4
LT		 428/*
429 * Start device recognition.
430 */
736b5db8 431void ccw_device_recognition(struct ccw_device *cdev)
1da177e4 432{
736b5db8 433 struct subchannel *sch = to_subchannel(cdev->dev.parent);
1da177e4
LT		 434
435 /*
436 * We used to start here with a sense pgid to find out whether a device
437 * is locked by someone else. Unfortunately, the sense pgid command
438 * code has other meanings on devices predating the path grouping
439 * algorithm, so we start with sense id and box the device after an
440 * timeout (or if sense pgid during path verification detects the device
441 * is locked, as may happen on newer devices).
442 */
443 cdev->private->flags.recog_done = 0;
444 cdev->private->state = DEV_STATE_SENSE_ID;
736b5db8
PO		 445 if (cio_enable_subchannel(sch, (u32) (addr_t) sch)) {
446 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
447 return;
448 }
1da177e4 449 ccw_device_sense_id_start(cdev);
1da177e4
LT		 450}
451
452/*
39f5360b 453 * Handle events for states that use the ccw request infrastructure.
1da177e4 454 */
39f5360b 455static void ccw_device_request_event(struct ccw_device *cdev, enum dev_event e)
1da177e4 456{
39f5360b
PO		 457 switch (e) {
458 case DEV_EVENT_NOTOPER:
459 ccw_request_notoper(cdev);
1da177e4 460 break;
39f5360b
PO		 461 case DEV_EVENT_INTERRUPT:
462 ccw_request_handler(cdev);
463 break;
464 case DEV_EVENT_TIMEOUT:
465 ccw_request_timeout(cdev);
1da177e4
LT		 466 break;
467 default:
39f5360b 468 break;
1da177e4
LT		 469 }
470}
471
585b954e
SO		 472static void ccw_device_report_path_events(struct ccw_device *cdev)
473{
474 struct subchannel *sch = to_subchannel(cdev->dev.parent);
475 int path_event[8];
476 int chp, mask;
477
478 for (chp = 0, mask = 0x80; chp < 8; chp++, mask >>= 1) {
479 path_event[chp] = PE_NONE;
480 if (mask & cdev->private->path_gone_mask & ~(sch->vpm))
481 path_event[chp] |= PE_PATH_GONE;
482 if (mask & cdev->private->path_new_mask & sch->vpm)
483 path_event[chp] |= PE_PATH_AVAILABLE;
484 if (mask & cdev->private->pgid_reset_mask & sch->vpm)
485 path_event[chp] |= PE_PATHGROUP_ESTABLISHED;
486 }
487 if (cdev->online && cdev->drv->path_event)
488 cdev->drv->path_event(cdev, path_event);
489}
490
491static void ccw_device_reset_path_events(struct ccw_device *cdev)
492{
493 cdev->private->path_gone_mask = 0;
494 cdev->private->path_new_mask = 0;
495 cdev->private->pgid_reset_mask = 0;
496}
497
50c8e31f
SO		 498static void create_fake_irb(struct irb *irb, int type)
499{
500 memset(irb, 0, sizeof(*irb));
501 if (type == FAKE_CMD_IRB) {
502 struct cmd_scsw *scsw = &irb->scsw.cmd;
503 scsw->cc = 1;
504 scsw->fctl = SCSW_FCTL_START_FUNC;
505 scsw->actl = SCSW_ACTL_START_PEND;
506 scsw->stctl = SCSW_STCTL_STATUS_PEND;
507 } else if (type == FAKE_TM_IRB) {
508 struct tm_scsw *scsw = &irb->scsw.tm;
509 scsw->x = 1;
510 scsw->cc = 1;
511 scsw->fctl = SCSW_FCTL_START_FUNC;
512 scsw->actl = SCSW_ACTL_START_PEND;
513 scsw->stctl = SCSW_STCTL_STATUS_PEND;
514 }
515}
516
517void ccw_device_verify_done(struct ccw_device *cdev, int err)
1da177e4 518{
28bdc6f6
PO		 519 struct subchannel *sch;
520
521 sch = to_subchannel(cdev->dev.parent);
522 /* Update schib - pom may have changed. */
cdb912a4 523 if (cio_update_schib(sch)) {
7c4d964f
PO		 524 err = -ENODEV;
525 goto callback;
cdb912a4 526 }
28bdc6f6
PO		 527 /* Update lpm with verified path mask. */
528 sch->lpm = sch->vpm;
529 /* Repeat path verification? */
530 if (cdev->private->flags.doverify) {
28bdc6f6
PO		 531 ccw_device_verify_start(cdev);
532 return;
533 }
7c4d964f 534callback:
1da177e4 535 switch (err) {
1da177e4
LT		 536 case 0:
537 ccw_device_done(cdev, DEV_STATE_ONLINE);
538 /* Deliver fake irb to device driver, if needed. */
539 if (cdev->private->flags.fake_irb) {
50c8e31f
SO		 540 create_fake_irb(&cdev->private->irb,
541 cdev->private->flags.fake_irb);
1da177e4
LT		 542 cdev->private->flags.fake_irb = 0;
543 if (cdev->handler)
544 cdev->handler(cdev, cdev->private->intparm,
545 &cdev->private->irb);
546 memset(&cdev->private->irb, 0, sizeof(struct irb));
547 }
585b954e 548 ccw_device_report_path_events(cdev);
1da177e4
LT		 549 break;
550 case -ETIME:
52ef0608 551 case -EUSERS:
8b42f5c2
PO		 552 /* Reset oper notify indication after verify error. */
553 cdev->private->flags.donotify = 0;
1da177e4
LT		 554 ccw_device_done(cdev, DEV_STATE_BOXED);
555 break;
7c4d964f
PO		 556 case -EACCES:
557 /* Reset oper notify indication after verify error. */
558 cdev->private->flags.donotify = 0;
559 ccw_device_done(cdev, DEV_STATE_DISCONNECTED);
560 break;
1da177e4 561 default:
8b42f5c2
PO		 562 /* Reset oper notify indication after verify error. */
563 cdev->private->flags.donotify = 0;
7c4d964f 564 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
1da177e4
LT		 565 break;
566 }
585b954e 567 ccw_device_reset_path_events(cdev);
1da177e4
LT		 568}
569
570/*
571 * Get device online.
572 */
573int
574ccw_device_online(struct ccw_device *cdev)
575{
576 struct subchannel *sch;
577 int ret;
578
579 if ((cdev->private->state != DEV_STATE_OFFLINE) &&
580 (cdev->private->state != DEV_STATE_BOXED))
581 return -EINVAL;
582 sch = to_subchannel(cdev->dev.parent);
edf22096 583 ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
1da177e4
LT		 584 if (ret != 0) {
585 /* Couldn't enable the subchannel for i/o. Sick device. */
586 if (ret == -ENODEV)
587 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
588 return ret;
589 }
52ef0608
PO		 590 /* Start initial path verification. */
591 cdev->private->state = DEV_STATE_VERIFY;
592 ccw_device_verify_start(cdev);
1da177e4
LT		 593 return 0;
594}
595
596void
597ccw_device_disband_done(struct ccw_device *cdev, int err)
598{
599 switch (err) {
600 case 0:
601 ccw_device_done(cdev, DEV_STATE_OFFLINE);
602 break;
603 case -ETIME:
604 ccw_device_done(cdev, DEV_STATE_BOXED);
605 break;
606 default:
3ecb0a5a 607 cdev->private->flags.donotify = 0;
1da177e4
LT		 608 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
609 break;
610 }
611}
612
613/*
614 * Shutdown device.
615 */
616int
617ccw_device_offline(struct ccw_device *cdev)
618{
619 struct subchannel *sch;
620
b301ea8c
PO		 621 /* Allow ccw_device_offline while disconnected. */
622 if (cdev->private->state == DEV_STATE_DISCONNECTED ||
623 cdev->private->state == DEV_STATE_NOT_OPER) {
624 cdev->private->flags.donotify = 0;
625 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
626 return 0;
627 }
102e835d
PO		 628 if (cdev->private->state == DEV_STATE_BOXED) {
629 ccw_device_done(cdev, DEV_STATE_BOXED);
630 return 0;
631 }
d7b5a4c9
CH		 632 if (ccw_device_is_orphan(cdev)) {
633 ccw_device_done(cdev, DEV_STATE_OFFLINE);
634 return 0;
635 }
1da177e4 636 sch = to_subchannel(cdev->dev.parent);
cdb912a4 637 if (cio_update_schib(sch))
1da177e4 638 return -ENODEV;
23d805b6 639 if (scsw_actl(&sch->schib.scsw) != 0)
1da177e4 640 return -EBUSY;
23d805b6
PO		 641 if (cdev->private->state != DEV_STATE_ONLINE)
642 return -EINVAL;
1da177e4 643 /* Are we doing path grouping? */
454e1fa1 644 if (!cdev->private->flags.pgroup) {
1da177e4
LT		 645 /* No, set state offline immediately. */
646 ccw_device_done(cdev, DEV_STATE_OFFLINE);
647 return 0;
648 }
649 /* Start Set Path Group commands. */
650 cdev->private->state = DEV_STATE_DISBAND_PGID;
651 ccw_device_disband_start(cdev);
652 return 0;
653}
654
1da177e4 655/*
3f4cf6e7 656 * Handle not operational event in non-special state.
1da177e4 657 */
3f4cf6e7
CH		 658static void ccw_device_generic_notoper(struct ccw_device *cdev,
659 enum dev_event dev_event)
1da177e4 660{
76e6fb4b 661 if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK)
37de53bb 662 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
6afcc775
PO		 663 else
664 ccw_device_set_disconnected(cdev);
1da177e4
LT		 665}
666
1f1148c8
PO		 667/*
668 * Handle path verification event in offline state.
669 */
670static void ccw_device_offline_verify(struct ccw_device *cdev,
671 enum dev_event dev_event)
672{
673 struct subchannel *sch = to_subchannel(cdev->dev.parent);
674
675 css_schedule_eval(sch->schid);
676}
677
1da177e4
LT		 678/*
679 * Handle path verification event.
680 */
681static void
682ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
683{
684 struct subchannel *sch;
685
1da177e4
LT		 686 if (cdev->private->state == DEV_STATE_W4SENSE) {
687 cdev->private->flags.doverify = 1;
688 return;
689 }
690 sch = to_subchannel(cdev->dev.parent);
691 /*
692 * Since we might not just be coming from an interrupt from the
693 * subchannel we have to update the schib.
694 */
cdb912a4
SO		 695 if (cio_update_schib(sch)) {
696 ccw_device_verify_done(cdev, -ENODEV);
697 return;
698 }
1da177e4 699
23d805b6
PO		 700 if (scsw_actl(&sch->schib.scsw) != 0 ||
701 (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
702 (scsw_stctl(&cdev->private->irb.scsw) & SCSW_STCTL_STATUS_PEND)) {
1da177e4
LT		 703 /*
704 * No final status yet or final status not yet delivered
25985edc 705 * to the device driver. Can't do path verification now,
1da177e4
LT		 706 * delay until final status was delivered.
707 */
708 cdev->private->flags.doverify = 1;
709 return;
710 }
711 /* Device is idle, we can do the path verification. */
712 cdev->private->state = DEV_STATE_VERIFY;
713 ccw_device_verify_start(cdev);
714}
715
d7d12ef2
PO		 716/*
717 * Handle path verification event in boxed state.
718 */
719static void ccw_device_boxed_verify(struct ccw_device *cdev,
720 enum dev_event dev_event)
721{
722 struct subchannel *sch = to_subchannel(cdev->dev.parent);
723
724 if (cdev->online) {
725 if (cio_enable_subchannel(sch, (u32) (addr_t) sch))
726 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
727 else
728 ccw_device_online_verify(cdev, dev_event);
729 } else
730 css_schedule_eval(sch->schid);
731}
732
8421d212
SO		 733/*
734 * Pass interrupt to device driver.
735 */
736static int ccw_device_call_handler(struct ccw_device *cdev)
737{
738 unsigned int stctl;
739 int ending_status;
740
741 /*
742 * we allow for the device action handler if .
743 * - we received ending status
744 * - the action handler requested to see all interrupts
745 * - we received an intermediate status
746 * - fast notification was requested (primary status)
747 * - unsolicited interrupts
748 */
749 stctl = scsw_stctl(&cdev->private->irb.scsw);
750 ending_status = (stctl & SCSW_STCTL_SEC_STATUS) ||
751 (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) ||
752 (stctl == SCSW_STCTL_STATUS_PEND);
753 if (!ending_status &&
754 !cdev->private->options.repall &&
755 !(stctl & SCSW_STCTL_INTER_STATUS) &&
756 !(cdev->private->options.fast &&
757 (stctl & SCSW_STCTL_PRIM_STATUS)))
758 return 0;
759
760 if (ending_status)
761 ccw_device_set_timeout(cdev, 0);
762
763 if (cdev->handler)
764 cdev->handler(cdev, cdev->private->intparm,
765 &cdev->private->irb);
766
767 memset(&cdev->private->irb, 0, sizeof(struct irb));
768 return 1;
769}
770
1da177e4
LT		 771/*
772 * Got an interrupt for a normal io (state online).
773 */
774static void
775ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
776{
777 struct irb *irb;
83262d63 778 int is_cmd;
1da177e4 779
0bf7fcf1 780 irb = this_cpu_ptr(&cio_irb);
83262d63 781 is_cmd = !scsw_is_tm(&irb->scsw);
1da177e4 782 /* Check for unsolicited interrupt. */
23d805b6 783 if (!scsw_is_solicited(&irb->scsw)) {
83262d63 784 if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
1da177e4
LT		 785 !irb->esw.esw0.erw.cons) {
786 /* Unit check but no sense data. Need basic sense. */
787 if (ccw_device_do_sense(cdev, irb) != 0)
788 goto call_handler_unsol;
e0ec5749 789 memcpy(&cdev->private->irb, irb, sizeof(struct irb));
1da177e4
LT		 790 cdev->private->state = DEV_STATE_W4SENSE;
791 cdev->private->intparm = 0;
792 return;
793 }
794call_handler_unsol:
795 if (cdev->handler)
796 cdev->handler (cdev, 0, irb);
18374d37
CH		 797 if (cdev->private->flags.doverify)
798 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 799 return;
800 }
801 /* Accumulate status and find out if a basic sense is needed. */
802 ccw_device_accumulate_irb(cdev, irb);
83262d63 803 if (is_cmd && cdev->private->flags.dosense) {
1da177e4
LT		 804 if (ccw_device_do_sense(cdev, irb) == 0) {
805 cdev->private->state = DEV_STATE_W4SENSE;
806 }
807 return;
808 }
809 /* Call the handler. */
810 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
811 /* Start delayed path verification. */
812 ccw_device_online_verify(cdev, 0);
813}
814
815/*
816 * Got an timeout in online state.
817 */
818static void
819ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
820{
821 int ret;
822
823 ccw_device_set_timeout(cdev, 0);
376ae475 824 cdev->private->iretry = 255;
1da177e4
LT		 825 ret = ccw_device_cancel_halt_clear(cdev);
826 if (ret == -EBUSY) {
827 ccw_device_set_timeout(cdev, 3*HZ);
828 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
829 return;
830 }
376ae475 831 if (ret)
3f4cf6e7
CH		 832 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
833 else if (cdev->handler)
1da177e4
LT		 834 cdev->handler(cdev, cdev->private->intparm,
835 ERR_PTR(-ETIMEDOUT));
836}
837
838/*
839 * Got an interrupt for a basic sense.
840 */
2b67fc46 841static void
1da177e4
LT		 842ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
843{
844 struct irb *irb;
845
0bf7fcf1 846 irb = this_cpu_ptr(&cio_irb);
1da177e4 847 /* Check for unsolicited interrupt. */
23d805b6
PO		 848 if (scsw_stctl(&irb->scsw) ==
849 (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
850 if (scsw_cc(&irb->scsw) == 1)
1da177e4
LT		 851 /* Basic sense hasn't started. Try again. */
852 ccw_device_do_sense(cdev, irb);
853 else {
139b83dd 854 CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited "
e556bbbd
CH		 855 "interrupt during w4sense...\n",
856 cdev->private->dev_id.ssid,
857 cdev->private->dev_id.devno);
1da177e4
LT		 858 if (cdev->handler)
859 cdev->handler (cdev, 0, irb);
860 }
861 return;
862 }
3ba1998e
CH		 863 /*
864 * Check if a halt or clear has been issued in the meanwhile. If yes,
865 * only deliver the halt/clear interrupt to the device driver as if it
866 * had killed the original request.
867 */
23d805b6
PO		 868 if (scsw_fctl(&irb->scsw) &
869 (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
3ba1998e
CH		 870 cdev->private->flags.dosense = 0;
871 memset(&cdev->private->irb, 0, sizeof(struct irb));
872 ccw_device_accumulate_irb(cdev, irb);
873 goto call_handler;
874 }
1da177e4
LT		 875 /* Add basic sense info to irb. */
876 ccw_device_accumulate_basic_sense(cdev, irb);
877 if (cdev->private->flags.dosense) {
878 /* Another basic sense is needed. */
879 ccw_device_do_sense(cdev, irb);
880 return;
881 }
3ba1998e 882call_handler:
1da177e4 883 cdev->private->state = DEV_STATE_ONLINE;
217ee6c6
ME		 884 /* In case sensing interfered with setting the device online */
885 wake_up(&cdev->private->wait_q);
1da177e4
LT		 886 /* Call the handler. */
887 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
888 /* Start delayed path verification. */
889 ccw_device_online_verify(cdev, 0);
890}
891
1da177e4
LT		 892static void
893ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
894{
1da177e4 895 ccw_device_set_timeout(cdev, 0);
7c8427c3
CH		 896 /* Start delayed path verification. */
897 ccw_device_online_verify(cdev, 0);
1da177e4 898 /* OK, i/o is dead now. Call interrupt handler. */
1da177e4
LT		 899 if (cdev->handler)
900 cdev->handler(cdev, cdev->private->intparm,
e7769b48 901 ERR_PTR(-EIO));
1da177e4
LT		 902}
903
904static void
905ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
906{
907 int ret;
908
909 ret = ccw_device_cancel_halt_clear(cdev);
910 if (ret == -EBUSY) {
911 ccw_device_set_timeout(cdev, 3*HZ);
912 return;
913 }
7c8427c3
CH		 914 /* Start delayed path verification. */
915 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 916 if (cdev->handler)
917 cdev->handler(cdev, cdev->private->intparm,
e7769b48 918 ERR_PTR(-EIO));
1da177e4
LT		 919}
920
c820de39 921void ccw_device_kill_io(struct ccw_device *cdev)
1da177e4
LT		 922{
923 int ret;
1da177e4 924
376ae475 925 cdev->private->iretry = 255;
1da177e4
LT		 926 ret = ccw_device_cancel_halt_clear(cdev);
927 if (ret == -EBUSY) {
928 ccw_device_set_timeout(cdev, 3*HZ);
929 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
930 return;
931 }
7c8427c3
CH		 932 /* Start delayed path verification. */
933 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 934 if (cdev->handler)
935 cdev->handler(cdev, cdev->private->intparm,
e7769b48 936 ERR_PTR(-EIO));
1da177e4
LT		 937}
938
939static void
28bdc6f6 940ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1da177e4 941{
28bdc6f6 942 /* Start verification after current task finished. */
7e560814 943 cdev->private->flags.doverify = 1;
1da177e4
LT		 944}
945
1da177e4
LT		 946static void
947ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
948{
949 struct subchannel *sch;
950
951 sch = to_subchannel(cdev->dev.parent);
edf22096 952 if (cio_enable_subchannel(sch, (u32)(addr_t)sch) != 0)
1da177e4
LT		 953 /* Couldn't enable the subchannel for i/o. Sick device. */
954 return;
1da177e4
LT		 955 cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
956 ccw_device_sense_id_start(cdev);
957}
958
c820de39 959void ccw_device_trigger_reprobe(struct ccw_device *cdev)
1da177e4 960{
c820de39 961 struct subchannel *sch;
1da177e4 962
1da177e4
LT		 963 if (cdev->private->state != DEV_STATE_DISCONNECTED)
964 return;
965
c820de39 966 sch = to_subchannel(cdev->dev.parent);
1da177e4 967 /* Update some values. */
cdb912a4 968 if (cio_update_schib(sch))
7674da77 969 return;
1da177e4
LT		 970 /*
971 * The pim, pam, pom values may not be accurate, but they are the best
972 * we have before performing device selection :/
973 */
28bdc6f6 974 sch->lpm = sch->schib.pmcw.pam & sch->opm;
13952ec1
SO		 975 /*
976 * Use the initial configuration since we can't be shure that the old
977 * paths are valid.
978 */
979 io_subchannel_init_config(sch);
f444cc0e
SO		 980 if (cio_commit_config(sch))
981 return;
13952ec1 982
1da177e4 983 /* We should also udate ssd info, but this has to wait. */
d7b5a4c9 984 /* Check if this is another device which appeared on the same sch. */
5d6e6b6f
PO		 985 if (sch->schib.pmcw.dev != cdev->private->dev_id.devno)
986 css_schedule_eval(sch->schid);
987 else
d7b5a4c9 988 ccw_device_start_id(cdev, 0);
1da177e4
LT		 989}
990
16b9a057
PO		 991static void ccw_device_disabled_irq(struct ccw_device *cdev,
992 enum dev_event dev_event)
1da177e4
LT		 993{
994 struct subchannel *sch;
995
996 sch = to_subchannel(cdev->dev.parent);
997 /*
16b9a057 998 * An interrupt in a disabled state means a previous disable was not
ed04b892 999 * successful - should not happen, but we try to disable again.
1da177e4
LT		 1000 */
1001 cio_disable_subchannel(sch);
1002}
1003
1004static void
1005ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
1006{
1007 retry_set_schib(cdev);
1008 cdev->private->state = DEV_STATE_ONLINE;
1009 dev_fsm_event(cdev, dev_event);
1010}
1011
94bb0633
CH		 1012static void ccw_device_update_cmfblock(struct ccw_device *cdev,
1013 enum dev_event dev_event)
1014{
1015 cmf_retry_copy_block(cdev);
1016 cdev->private->state = DEV_STATE_ONLINE;
1017 dev_fsm_event(cdev, dev_event);
1018}
1da177e4
LT		 1019
1020static void
1021ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1022{
1023 ccw_device_set_timeout(cdev, 0);
56e6b796 1024 cdev->private->state = DEV_STATE_NOT_OPER;
1da177e4
LT		 1025 wake_up(&cdev->private->wait_q);
1026}
1027
1028static void
1029ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1030{
1031 int ret;
1032
1033 ret = ccw_device_cancel_halt_clear(cdev);
56e6b796
SO		 1034 if (ret == -EBUSY) {
1035 ccw_device_set_timeout(cdev, HZ/10);
1036 } else {
1da177e4
LT		 1037 cdev->private->state = DEV_STATE_NOT_OPER;
1038 wake_up(&cdev->private->wait_q);
1da177e4
LT		 1039 }
1040}
1041
1042/*
1043 * No operation action. This is used e.g. to ignore a timeout event in
1044 * state offline.
1045 */
1046static void
1047ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1048{
1049}
1050
1da177e4
LT		 1051/*
1052 * device statemachine
1053 */
1054fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1055 [DEV_STATE_NOT_OPER] = {
1056 [DEV_EVENT_NOTOPER] = ccw_device_nop,
16b9a057 1057 [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq,
1da177e4
LT		 1058 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1059 [DEV_EVENT_VERIFY] = ccw_device_nop,
1060 },
1061 [DEV_STATE_SENSE_PGID] = {
9679baaf
PO		 1062 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1063 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1064 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1da177e4
LT		 1065 [DEV_EVENT_VERIFY] = ccw_device_nop,
1066 },
1067 [DEV_STATE_SENSE_ID] = {
39f5360b
PO		 1068 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1069 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1070 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1da177e4
LT		 1071 [DEV_EVENT_VERIFY] = ccw_device_nop,
1072 },
1073 [DEV_STATE_OFFLINE] = {
3f4cf6e7 1074 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
16b9a057 1075 [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq,
1da177e4 1076 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1f1148c8 1077 [DEV_EVENT_VERIFY] = ccw_device_offline_verify,
1da177e4
LT		 1078 },
1079 [DEV_STATE_VERIFY] = {
9679baaf
PO		 1080 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1081 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1082 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
28bdc6f6 1083 [DEV_EVENT_VERIFY] = ccw_device_delay_verify,
1da177e4
LT		 1084 },
1085 [DEV_STATE_ONLINE] = {
3f4cf6e7 1086 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1087 [DEV_EVENT_INTERRUPT] = ccw_device_irq,
1088 [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout,
1089 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1090 },
1091 [DEV_STATE_W4SENSE] = {
3f4cf6e7 1092 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1093 [DEV_EVENT_INTERRUPT] = ccw_device_w4sense,
1094 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1095 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1096 },
1097 [DEV_STATE_DISBAND_PGID] = {
9679baaf
PO		 1098 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1099 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1100 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1da177e4
LT		 1101 [DEV_EVENT_VERIFY] = ccw_device_nop,
1102 },
1103 [DEV_STATE_BOXED] = {
3f4cf6e7 1104 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
d7d12ef2
PO		 1105 [DEV_EVENT_INTERRUPT] = ccw_device_nop,
1106 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1107 [DEV_EVENT_VERIFY] = ccw_device_boxed_verify,
1da177e4
LT		 1108 },
1109 /* states to wait for i/o completion before doing something */
1da177e4 1110 [DEV_STATE_TIMEOUT_KILL] = {
3f4cf6e7 1111 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1112 [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq,
1113 [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout,
1114 [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME
1115 },
1da177e4
LT		 1116 [DEV_STATE_QUIESCE] = {
1117 [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done,
1118 [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done,
1119 [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout,
1120 [DEV_EVENT_VERIFY] = ccw_device_nop,
1121 },
1122 /* special states for devices gone not operational */
1123 [DEV_STATE_DISCONNECTED] = {
1124 [DEV_EVENT_NOTOPER] = ccw_device_nop,
1125 [DEV_EVENT_INTERRUPT] = ccw_device_start_id,
16b9a057 1126 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
28bdc6f6 1127 [DEV_EVENT_VERIFY] = ccw_device_start_id,
1da177e4
LT		 1128 },
1129 [DEV_STATE_DISCONNECTED_SENSE_ID] = {
39f5360b
PO		 1130 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1131 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1132 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1da177e4
LT		 1133 [DEV_EVENT_VERIFY] = ccw_device_nop,
1134 },
1135 [DEV_STATE_CMFCHANGE] = {
1136 [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate,
1137 [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate,
1138 [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate,
1139 [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate,
1140 },
94bb0633
CH		 1141 [DEV_STATE_CMFUPDATE] = {
1142 [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock,
1143 [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock,
1144 [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock,
1145 [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock,
1146 },
d7d12ef2
PO		 1147 [DEV_STATE_STEAL_LOCK] = {
1148 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1149 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1150 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1151 [DEV_EVENT_VERIFY] = ccw_device_nop,
1152 },
1da177e4
LT		 1153};
1154
1da177e4 1155EXPORT_SYMBOL_GPL(ccw_device_set_timeout);
Linux 6.x block layer and io_uring tree(s)