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Merge branch 'kvm-lapic-fix-and-cleanup' into HEAD
[linux-block.git] / drivers / s390 / cio / device_fsm.c
CommitLineData
724117b7 1// SPDX-License-Identifier: GPL-2.0
1da177e4 2/*
1da177e4
LT		 3 * finite state machine for device handling
4 *
a53c8fab 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>
5c2e5a0c 12#include <linux/io.h>
4e57b681
TS		 13#include <linux/jiffies.h>
14#include <linux/string.h>
1da177e4
LT		 15
16#include <asm/ccwdev.h>
4c24da79 17#include <asm/cio.h>
e5854a58 18#include <asm/chpid.h>
1da177e4
LT		 19
20#include "cio.h"
21#include "cio_debug.h"
22#include "css.h"
23#include "device.h"
24#include "chsc.h"
25#include "ioasm.h"
e6b6e10a 26#include "chp.h"
1da177e4 27
14ff56bb
SO		 28static int timeout_log_enabled;
29
14ff56bb
SO		 30static int __init ccw_timeout_log_setup(char *unused)
31{
32 timeout_log_enabled = 1;
33 return 1;
34}
35
36__setup("ccw_timeout_log", ccw_timeout_log_setup);
37
38static void ccw_timeout_log(struct ccw_device *cdev)
39{
40 struct schib schib;
41 struct subchannel *sch;
cd6b4f27 42 struct io_subchannel_private *private;
83262d63 43 union orb *orb;
14ff56bb
SO		 44 int cc;
45
46 sch = to_subchannel(cdev->dev.parent);
cd6b4f27 47 private = to_io_private(sch);
83262d63 48 orb = &private->orb;
62e65da9 49 cc = stsch(sch->schid, &schib);
14ff56bb 50
eba8e1af 51 printk(KERN_WARNING "cio: ccw device timeout occurred at %lx, "
1aae0560 52 "device information:\n", get_tod_clock());
14ff56bb
SO		 53 printk(KERN_WARNING "cio: orb:\n");
54 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
83262d63 55 orb, sizeof(*orb), 0);
2a0217d5
KS		 56 printk(KERN_WARNING "cio: ccw device bus id: %s\n",
57 dev_name(&cdev->dev));
58 printk(KERN_WARNING "cio: subchannel bus id: %s\n",
59 dev_name(&sch->dev));
14ff56bb
SO		 60 printk(KERN_WARNING "cio: subchannel lpm: %02x, opm: %02x, "
61 "vpm: %02x\n", sch->lpm, sch->opm, sch->vpm);
62
83262d63
PO		 63 if (orb->tm.b) {
64 printk(KERN_WARNING "cio: orb indicates transport mode\n");
65 printk(KERN_WARNING "cio: last tcw:\n");
66 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
5c2e5a0c 67 phys_to_virt(orb->tm.tcw),
83262d63
PO		 68 sizeof(struct tcw), 0);
69 } else {
70 printk(KERN_WARNING "cio: orb indicates command mode\n");
37db8985
HP		 71 if ((void *)(addr_t)orb->cmd.cpa ==
72 &private->dma_area->sense_ccw ||
73 (void *)(addr_t)orb->cmd.cpa ==
74 cdev->private->dma_area->iccws)
83262d63
PO		 75 printk(KERN_WARNING "cio: last channel program "
76 "(intern):\n");
77 else
78 printk(KERN_WARNING "cio: last channel program:\n");
79
80 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
5c2e5a0c 81 phys_to_virt(orb->cmd.cpa),
83262d63
PO		 82 sizeof(struct ccw1), 0);
83 }
14ff56bb
SO		 84 printk(KERN_WARNING "cio: ccw device state: %d\n",
85 cdev->private->state);
86 printk(KERN_WARNING "cio: store subchannel returned: cc=%d\n", cc);
87 printk(KERN_WARNING "cio: schib:\n");
88 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
89 &schib, sizeof(schib), 0);
90 printk(KERN_WARNING "cio: ccw device flags:\n");
91 print_hex_dump(KERN_WARNING, "cio: ", DUMP_PREFIX_NONE, 16, 1,
92 &cdev->private->flags, sizeof(cdev->private->flags), 0);
93}
94
1da177e4
LT		 95/*
96 * Timeout function. It just triggers a DEV_EVENT_TIMEOUT.
97 */
846d0c6f
KC		 98void
99ccw_device_timeout(struct timer_list *t)
1da177e4 100{
846d0c6f
KC		 101 struct ccw_device_private *priv = from_timer(priv, t, timer);
102 struct ccw_device *cdev = priv->cdev;
1da177e4 103
1da177e4 104 spin_lock_irq(cdev->ccwlock);
14ff56bb
SO		 105 if (timeout_log_enabled)
106 ccw_timeout_log(cdev);
1da177e4
LT		 107 dev_fsm_event(cdev, DEV_EVENT_TIMEOUT);
108 spin_unlock_irq(cdev->ccwlock);
109}
110
111/*
112 * Set timeout
113 */
114void
115ccw_device_set_timeout(struct ccw_device *cdev, int expires)
116{
4f45c37f 117 if (expires == 0)
1da177e4 118 del_timer(&cdev->private->timer);
4f45c37f
YL		 119 else
120 mod_timer(&cdev->private->timer, jiffies + expires);
1da177e4
LT		 121}
122
1da177e4
LT		 123int
124ccw_device_cancel_halt_clear(struct ccw_device *cdev)
125{
126 struct subchannel *sch;
127 int ret;
128
129 sch = to_subchannel(cdev->dev.parent);
5434da4d
DJS		 130 ret = cio_cancel_halt_clear(sch, &cdev->private->iretry);
131
132 if (ret == -EIO)
133 CIO_MSG_EVENT(0, "0.%x.%04x: could not stop I/O\n",
134 cdev->private->dev_id.ssid,
135 cdev->private->dev_id.devno);
136
137 return ret;
1da177e4
LT		 138}
139
823d494a 140void ccw_device_update_sense_data(struct ccw_device *cdev)
1da177e4 141{
823d494a 142 memset(&cdev->id, 0, sizeof(cdev->id));
37db8985
HP		 143 cdev->id.cu_type = cdev->private->dma_area->senseid.cu_type;
144 cdev->id.cu_model = cdev->private->dma_area->senseid.cu_model;
145 cdev->id.dev_type = cdev->private->dma_area->senseid.dev_type;
146 cdev->id.dev_model = cdev->private->dma_area->senseid.dev_model;
823d494a 147}
1da177e4 148
823d494a
SO		 149int ccw_device_test_sense_data(struct ccw_device *cdev)
150{
37db8985
HP		 151 return cdev->id.cu_type ==
152 cdev->private->dma_area->senseid.cu_type &&
153 cdev->id.cu_model ==
154 cdev->private->dma_area->senseid.cu_model &&
155 cdev->id.dev_type ==
156 cdev->private->dma_area->senseid.dev_type &&
157 cdev->id.dev_model ==
158 cdev->private->dma_area->senseid.dev_model;
1da177e4
LT		 159}
160
161/*
162 * The machine won't give us any notification by machine check if a chpid has
163 * been varied online on the SE so we have to find out by magic (i. e. driving
164 * the channel subsystem to device selection and updating our path masks).
165 */
4d284cac 166static void
1da177e4
LT		 167__recover_lost_chpids(struct subchannel *sch, int old_lpm)
168{
169 int mask, i;
f86635fa 170 struct chp_id chpid;
1da177e4 171
f86635fa 172 chp_id_init(&chpid);
1da177e4
LT		 173 for (i = 0; i<8; i++) {
174 mask = 0x80 >> i;
175 if (!(sch->lpm & mask))
176 continue;
177 if (old_lpm & mask)
178 continue;
f86635fa 179 chpid.id = sch->schib.pmcw.chpid[i];
83b3370c
PO		 180 if (!chp_is_registered(chpid))
181 css_schedule_eval_all();
1da177e4
LT		 182 }
183}
184
185/*
186 * Stop device recognition.
187 */
188static void
189ccw_device_recog_done(struct ccw_device *cdev, int state)
190{
191 struct subchannel *sch;
823d494a 192 int old_lpm;
1da177e4
LT		 193
194 sch = to_subchannel(cdev->dev.parent);
195
ec64333c
SO		 196 if (cio_disable_subchannel(sch))
197 state = DEV_STATE_NOT_OPER;
1da177e4
LT		 198 /*
199 * Now that we tried recognition, we have performed device selection
200 * through ssch() and the path information is up to date.
201 */
202 old_lpm = sch->lpm;
cdb912a4 203
4ffa9234 204 /* Check since device may again have become not operational. */
cdb912a4 205 if (cio_update_schib(sch))
4ffa9234 206 state = DEV_STATE_NOT_OPER;
cdb912a4
SO		 207 else
208 sch->lpm = sch->schib.pmcw.pam & sch->opm;
209
1da177e4
LT		 210 if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID)
211 /* Force reprobe on all chpids. */
212 old_lpm = 0;
213 if (sch->lpm != old_lpm)
214 __recover_lost_chpids(sch, old_lpm);
47593bfa
SO		 215 if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID &&
216 (state == DEV_STATE_NOT_OPER || state == DEV_STATE_BOXED)) {
217 cdev->private->flags.recog_done = 1;
218 cdev->private->state = DEV_STATE_DISCONNECTED;
219 wake_up(&cdev->private->wait_q);
220 return;
1da177e4 221 }
1da177e4
LT		 222 switch (state) {
223 case DEV_STATE_NOT_OPER:
1da177e4
LT		 224 break;
225 case DEV_STATE_OFFLINE:
823d494a
SO		 226 if (!cdev->online) {
227 ccw_device_update_sense_data(cdev);
823d494a 228 break;
1da177e4 229 }
823d494a
SO		 230 cdev->private->state = DEV_STATE_OFFLINE;
231 cdev->private->flags.recog_done = 1;
232 if (ccw_device_test_sense_data(cdev)) {
233 cdev->private->flags.donotify = 1;
234 ccw_device_online(cdev);
235 wake_up(&cdev->private->wait_q);
236 } else {
237 ccw_device_update_sense_data(cdev);
37de53bb 238 ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
1da177e4 239 }
823d494a 240 return;
1da177e4 241 case DEV_STATE_BOXED:
47593bfa
SO		 242 if (cdev->id.cu_type != 0) { /* device was recognized before */
243 cdev->private->flags.recog_done = 1;
244 cdev->private->state = DEV_STATE_BOXED;
245 wake_up(&cdev->private->wait_q);
246 return;
247 }
1da177e4
LT		 248 break;
249 }
250 cdev->private->state = state;
251 io_subchannel_recog_done(cdev);
156013ff 252 wake_up(&cdev->private->wait_q);
1da177e4
LT		 253}
254
255/*
256 * Function called from device_id.c after sense id has completed.
257 */
258void
259ccw_device_sense_id_done(struct ccw_device *cdev, int err)
260{
261 switch (err) {
262 case 0:
263 ccw_device_recog_done(cdev, DEV_STATE_OFFLINE);
264 break;
265 case -ETIME: /* Sense id stopped by timeout. */
266 ccw_device_recog_done(cdev, DEV_STATE_BOXED);
267 break;
268 default:
269 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
270 break;
271 }
272}
273
76e6fb4b
SO		 274/**
275 * ccw_device_notify() - inform the device's driver about an event
25985edc 276 * @cdev: device for which an event occurred
76e6fb4b
SO		 277 * @event: event that occurred
278 *
279 * Returns:
280 * -%EINVAL if the device is offline or has no driver.
281 * -%EOPNOTSUPP if the device's driver has no notifier registered.
282 * %NOTIFY_OK if the driver wants to keep the device.
283 * %NOTIFY_BAD if the driver doesn't want to keep the device.
284 */
c820de39
CH		 285int ccw_device_notify(struct ccw_device *cdev, int event)
286{
76e6fb4b
SO		 287 int ret = -EINVAL;
288
c820de39 289 if (!cdev->drv)
76e6fb4b 290 goto out;
c820de39 291 if (!cdev->online)
76e6fb4b 292 goto out;
91c36919
PO		 293 CIO_MSG_EVENT(2, "notify called for 0.%x.%04x, event=%d\n",
294 cdev->private->dev_id.ssid, cdev->private->dev_id.devno,
295 event);
76e6fb4b
SO		 296 if (!cdev->drv->notify) {
297 ret = -EOPNOTSUPP;
298 goto out;
299 }
300 if (cdev->drv->notify(cdev, event))
301 ret = NOTIFY_OK;
302 else
303 ret = NOTIFY_BAD;
304out:
305 return ret;
c820de39
CH		 306}
307
91c36919
PO		 308static void ccw_device_oper_notify(struct ccw_device *cdev)
309{
585b954e
SO		 310 struct subchannel *sch = to_subchannel(cdev->dev.parent);
311
76e6fb4b 312 if (ccw_device_notify(cdev, CIO_OPER) == NOTIFY_OK) {
94bb0633 313 /* Reenable channel measurements, if needed. */
37de53bb 314 ccw_device_sched_todo(cdev, CDEV_TODO_ENABLE_CMF);
585b954e
SO		 315 /* Save indication for new paths. */
316 cdev->private->path_new_mask = sch->vpm;
91c36919
PO		 317 return;
318 }
319 /* Driver doesn't want device back. */
320 ccw_device_set_notoper(cdev);
37de53bb 321 ccw_device_sched_todo(cdev, CDEV_TODO_REBIND);
1da177e4
LT		 322}
323
324/*
325 * Finished with online/offline processing.
326 */
327static void
328ccw_device_done(struct ccw_device *cdev, int state)
329{
330 struct subchannel *sch;
331
332 sch = to_subchannel(cdev->dev.parent);
333
f1ee3281
CH		 334 ccw_device_set_timeout(cdev, 0);
335
1da177e4
LT		 336 if (state != DEV_STATE_ONLINE)
337 cio_disable_subchannel(sch);
338
339 /* Reset device status. */
37db8985 340 memset(&cdev->private->dma_area->irb, 0, sizeof(struct irb));
1da177e4
LT		 341
342 cdev->private->state = state;
343
9a332116
PO		 344 switch (state) {
345 case DEV_STATE_BOXED:
139b83dd
ME		 346 CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
347 cdev->private->dev_id.devno, sch->schid.sch_no);
76e6fb4b
SO		 348 if (cdev->online &&
349 ccw_device_notify(cdev, CIO_BOXED) != NOTIFY_OK)
37de53bb 350 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
47593bfa 351 cdev->private->flags.donotify = 0;
9a332116
PO		 352 break;
353 case DEV_STATE_NOT_OPER:
626e476a
SO		 354 CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n",
355 cdev->private->dev_id.devno, sch->schid.sch_no);
76e6fb4b 356 if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK)
37de53bb 357 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
6afcc775
PO		 358 else
359 ccw_device_set_disconnected(cdev);
626e476a 360 cdev->private->flags.donotify = 0;
9a332116
PO		 361 break;
362 case DEV_STATE_DISCONNECTED:
363 CIO_MSG_EVENT(0, "Disconnected device %04x on subchannel "
364 "%04x\n", cdev->private->dev_id.devno,
365 sch->schid.sch_no);
9bf05098
SO		 366 if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK) {
367 cdev->private->state = DEV_STATE_NOT_OPER;
37de53bb 368 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
9bf05098 369 } else
9a332116
PO		 370 ccw_device_set_disconnected(cdev);
371 cdev->private->flags.donotify = 0;
372 break;
373 default:
374 break;
626e476a 375 }
1da177e4
LT		 376
377 if (cdev->private->flags.donotify) {
378 cdev->private->flags.donotify = 0;
91c36919 379 ccw_device_oper_notify(cdev);
1da177e4
LT		 380 }
381 wake_up(&cdev->private->wait_q);
1da177e4
LT		 382}
383
1da177e4
LT		 384/*
385 * Start device recognition.
386 */
736b5db8 387void ccw_device_recognition(struct ccw_device *cdev)
1da177e4 388{
736b5db8 389 struct subchannel *sch = to_subchannel(cdev->dev.parent);
1da177e4
LT		 390
391 /*
392 * We used to start here with a sense pgid to find out whether a device
393 * is locked by someone else. Unfortunately, the sense pgid command
394 * code has other meanings on devices predating the path grouping
395 * algorithm, so we start with sense id and box the device after an
396 * timeout (or if sense pgid during path verification detects the device
397 * is locked, as may happen on newer devices).
398 */
399 cdev->private->flags.recog_done = 0;
400 cdev->private->state = DEV_STATE_SENSE_ID;
5c2e5a0c 401 if (cio_enable_subchannel(sch, (u32)virt_to_phys(sch))) {
736b5db8
PO		 402 ccw_device_recog_done(cdev, DEV_STATE_NOT_OPER);
403 return;
404 }
1da177e4 405 ccw_device_sense_id_start(cdev);
1da177e4
LT		 406}
407
408/*
39f5360b 409 * Handle events for states that use the ccw request infrastructure.
1da177e4 410 */
39f5360b 411static void ccw_device_request_event(struct ccw_device *cdev, enum dev_event e)
1da177e4 412{
39f5360b
PO		 413 switch (e) {
414 case DEV_EVENT_NOTOPER:
415 ccw_request_notoper(cdev);
1da177e4 416 break;
39f5360b
PO		 417 case DEV_EVENT_INTERRUPT:
418 ccw_request_handler(cdev);
419 break;
420 case DEV_EVENT_TIMEOUT:
421 ccw_request_timeout(cdev);
1da177e4
LT		 422 break;
423 default:
39f5360b 424 break;
1da177e4
LT		 425 }
426}
427
585b954e
SO		 428static void ccw_device_report_path_events(struct ccw_device *cdev)
429{
430 struct subchannel *sch = to_subchannel(cdev->dev.parent);
431 int path_event[8];
432 int chp, mask;
433
434 for (chp = 0, mask = 0x80; chp < 8; chp++, mask >>= 1) {
435 path_event[chp] = PE_NONE;
436 if (mask & cdev->private->path_gone_mask & ~(sch->vpm))
437 path_event[chp] |= PE_PATH_GONE;
438 if (mask & cdev->private->path_new_mask & sch->vpm)
439 path_event[chp] |= PE_PATH_AVAILABLE;
440 if (mask & cdev->private->pgid_reset_mask & sch->vpm)
441 path_event[chp] |= PE_PATHGROUP_ESTABLISHED;
442 }
443 if (cdev->online && cdev->drv->path_event)
444 cdev->drv->path_event(cdev, path_event);
445}
446
447static void ccw_device_reset_path_events(struct ccw_device *cdev)
448{
449 cdev->private->path_gone_mask = 0;
450 cdev->private->path_new_mask = 0;
451 cdev->private->pgid_reset_mask = 0;
452}
453
50c8e31f
SO		 454static void create_fake_irb(struct irb *irb, int type)
455{
456 memset(irb, 0, sizeof(*irb));
457 if (type == FAKE_CMD_IRB) {
458 struct cmd_scsw *scsw = &irb->scsw.cmd;
459 scsw->cc = 1;
460 scsw->fctl = SCSW_FCTL_START_FUNC;
461 scsw->actl = SCSW_ACTL_START_PEND;
462 scsw->stctl = SCSW_STCTL_STATUS_PEND;
463 } else if (type == FAKE_TM_IRB) {
464 struct tm_scsw *scsw = &irb->scsw.tm;
465 scsw->x = 1;
466 scsw->cc = 1;
467 scsw->fctl = SCSW_FCTL_START_FUNC;
468 scsw->actl = SCSW_ACTL_START_PEND;
469 scsw->stctl = SCSW_STCTL_STATUS_PEND;
470 }
471}
472
55fb7347
SO		 473static void ccw_device_handle_broken_paths(struct ccw_device *cdev)
474{
475 struct subchannel *sch = to_subchannel(cdev->dev.parent);
476 u8 broken_paths = (sch->schib.pmcw.pam & sch->opm) ^ sch->vpm;
477
478 if (broken_paths && (cdev->private->path_broken_mask != broken_paths))
479 ccw_device_schedule_recovery();
480
481 cdev->private->path_broken_mask = broken_paths;
482}
483
50c8e31f 484void ccw_device_verify_done(struct ccw_device *cdev, int err)
1da177e4 485{
28bdc6f6
PO		 486 struct subchannel *sch;
487
488 sch = to_subchannel(cdev->dev.parent);
489 /* Update schib - pom may have changed. */
cdb912a4 490 if (cio_update_schib(sch)) {
7c4d964f
PO		 491 err = -ENODEV;
492 goto callback;
cdb912a4 493 }
28bdc6f6
PO		 494 /* Update lpm with verified path mask. */
495 sch->lpm = sch->vpm;
496 /* Repeat path verification? */
497 if (cdev->private->flags.doverify) {
28bdc6f6
PO		 498 ccw_device_verify_start(cdev);
499 return;
500 }
7c4d964f 501callback:
1da177e4 502 switch (err) {
1da177e4
LT		 503 case 0:
504 ccw_device_done(cdev, DEV_STATE_ONLINE);
505 /* Deliver fake irb to device driver, if needed. */
506 if (cdev->private->flags.fake_irb) {
37db8985 507 create_fake_irb(&cdev->private->dma_area->irb,
50c8e31f 508 cdev->private->flags.fake_irb);
1da177e4
LT		 509 cdev->private->flags.fake_irb = 0;
510 if (cdev->handler)
511 cdev->handler(cdev, cdev->private->intparm,
37db8985
HP		 512 &cdev->private->dma_area->irb);
513 memset(&cdev->private->dma_area->irb, 0,
514 sizeof(struct irb));
1da177e4 515 }
585b954e 516 ccw_device_report_path_events(cdev);
55fb7347 517 ccw_device_handle_broken_paths(cdev);
1da177e4
LT		 518 break;
519 case -ETIME:
52ef0608 520 case -EUSERS:
8b42f5c2
PO		 521 /* Reset oper notify indication after verify error. */
522 cdev->private->flags.donotify = 0;
1da177e4
LT		 523 ccw_device_done(cdev, DEV_STATE_BOXED);
524 break;
7c4d964f
PO		 525 case -EACCES:
526 /* Reset oper notify indication after verify error. */
527 cdev->private->flags.donotify = 0;
528 ccw_device_done(cdev, DEV_STATE_DISCONNECTED);
529 break;
1da177e4 530 default:
8b42f5c2
PO		 531 /* Reset oper notify indication after verify error. */
532 cdev->private->flags.donotify = 0;
7c4d964f 533 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
1da177e4
LT		 534 break;
535 }
585b954e 536 ccw_device_reset_path_events(cdev);
1da177e4
LT		 537}
538
539/*
540 * Get device online.
541 */
542int
543ccw_device_online(struct ccw_device *cdev)
544{
545 struct subchannel *sch;
546 int ret;
547
548 if ((cdev->private->state != DEV_STATE_OFFLINE) &&
549 (cdev->private->state != DEV_STATE_BOXED))
550 return -EINVAL;
551 sch = to_subchannel(cdev->dev.parent);
5c2e5a0c 552 ret = cio_enable_subchannel(sch, (u32)virt_to_phys(sch));
1da177e4
LT		 553 if (ret != 0) {
554 /* Couldn't enable the subchannel for i/o. Sick device. */
555 if (ret == -ENODEV)
556 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
557 return ret;
558 }
52ef0608
PO		 559 /* Start initial path verification. */
560 cdev->private->state = DEV_STATE_VERIFY;
561 ccw_device_verify_start(cdev);
1da177e4
LT		 562 return 0;
563}
564
565void
566ccw_device_disband_done(struct ccw_device *cdev, int err)
567{
568 switch (err) {
569 case 0:
570 ccw_device_done(cdev, DEV_STATE_OFFLINE);
571 break;
572 case -ETIME:
573 ccw_device_done(cdev, DEV_STATE_BOXED);
574 break;
575 default:
3ecb0a5a 576 cdev->private->flags.donotify = 0;
1da177e4
LT		 577 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
578 break;
579 }
580}
581
582/*
583 * Shutdown device.
584 */
585int
586ccw_device_offline(struct ccw_device *cdev)
587{
588 struct subchannel *sch;
589
b301ea8c
PO		 590 /* Allow ccw_device_offline while disconnected. */
591 if (cdev->private->state == DEV_STATE_DISCONNECTED ||
592 cdev->private->state == DEV_STATE_NOT_OPER) {
593 cdev->private->flags.donotify = 0;
594 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
595 return 0;
596 }
102e835d
PO		 597 if (cdev->private->state == DEV_STATE_BOXED) {
598 ccw_device_done(cdev, DEV_STATE_BOXED);
599 return 0;
600 }
d7b5a4c9
CH		 601 if (ccw_device_is_orphan(cdev)) {
602 ccw_device_done(cdev, DEV_STATE_OFFLINE);
603 return 0;
604 }
1da177e4 605 sch = to_subchannel(cdev->dev.parent);
cdb912a4 606 if (cio_update_schib(sch))
1da177e4 607 return -ENODEV;
23d805b6 608 if (scsw_actl(&sch->schib.scsw) != 0)
1da177e4 609 return -EBUSY;
23d805b6
PO		 610 if (cdev->private->state != DEV_STATE_ONLINE)
611 return -EINVAL;
1da177e4 612 /* Are we doing path grouping? */
454e1fa1 613 if (!cdev->private->flags.pgroup) {
1da177e4
LT		 614 /* No, set state offline immediately. */
615 ccw_device_done(cdev, DEV_STATE_OFFLINE);
616 return 0;
617 }
618 /* Start Set Path Group commands. */
619 cdev->private->state = DEV_STATE_DISBAND_PGID;
620 ccw_device_disband_start(cdev);
621 return 0;
622}
623
1da177e4 624/*
3f4cf6e7 625 * Handle not operational event in non-special state.
1da177e4 626 */
3f4cf6e7
CH		 627static void ccw_device_generic_notoper(struct ccw_device *cdev,
628 enum dev_event dev_event)
1da177e4 629{
76e6fb4b 630 if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK)
37de53bb 631 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
6afcc775
PO		 632 else
633 ccw_device_set_disconnected(cdev);
1da177e4
LT		 634}
635
1f1148c8
PO		 636/*
637 * Handle path verification event in offline state.
638 */
639static void ccw_device_offline_verify(struct ccw_device *cdev,
640 enum dev_event dev_event)
641{
642 struct subchannel *sch = to_subchannel(cdev->dev.parent);
643
644 css_schedule_eval(sch->schid);
645}
646
1da177e4
LT		 647/*
648 * Handle path verification event.
649 */
650static void
651ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
652{
653 struct subchannel *sch;
654
1da177e4
LT		 655 if (cdev->private->state == DEV_STATE_W4SENSE) {
656 cdev->private->flags.doverify = 1;
657 return;
658 }
659 sch = to_subchannel(cdev->dev.parent);
660 /*
661 * Since we might not just be coming from an interrupt from the
662 * subchannel we have to update the schib.
663 */
cdb912a4
SO		 664 if (cio_update_schib(sch)) {
665 ccw_device_verify_done(cdev, -ENODEV);
666 return;
667 }
1da177e4 668
23d805b6
PO		 669 if (scsw_actl(&sch->schib.scsw) != 0 ||
670 (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
37db8985
HP		 671 (scsw_stctl(&cdev->private->dma_area->irb.scsw) &
672 SCSW_STCTL_STATUS_PEND)) {
1da177e4
LT		 673 /*
674 * No final status yet or final status not yet delivered
25985edc 675 * to the device driver. Can't do path verification now,
1da177e4
LT		 676 * delay until final status was delivered.
677 */
678 cdev->private->flags.doverify = 1;
679 return;
680 }
681 /* Device is idle, we can do the path verification. */
682 cdev->private->state = DEV_STATE_VERIFY;
683 ccw_device_verify_start(cdev);
684}
685
d7d12ef2
PO		 686/*
687 * Handle path verification event in boxed state.
688 */
689static void ccw_device_boxed_verify(struct ccw_device *cdev,
690 enum dev_event dev_event)
691{
692 struct subchannel *sch = to_subchannel(cdev->dev.parent);
693
694 if (cdev->online) {
5c2e5a0c 695 if (cio_enable_subchannel(sch, (u32)virt_to_phys(sch)))
d7d12ef2
PO		 696 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
697 else
698 ccw_device_online_verify(cdev, dev_event);
699 } else
700 css_schedule_eval(sch->schid);
701}
702
8421d212
SO		 703/*
704 * Pass interrupt to device driver.
705 */
706static int ccw_device_call_handler(struct ccw_device *cdev)
707{
708 unsigned int stctl;
709 int ending_status;
710
711 /*
712 * we allow for the device action handler if .
713 * - we received ending status
714 * - the action handler requested to see all interrupts
715 * - we received an intermediate status
716 * - fast notification was requested (primary status)
717 * - unsolicited interrupts
718 */
37db8985 719 stctl = scsw_stctl(&cdev->private->dma_area->irb.scsw);
8421d212
SO		 720 ending_status = (stctl & SCSW_STCTL_SEC_STATUS) ||
721 (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) ||
722 (stctl == SCSW_STCTL_STATUS_PEND);
723 if (!ending_status &&
724 !cdev->private->options.repall &&
725 !(stctl & SCSW_STCTL_INTER_STATUS) &&
726 !(cdev->private->options.fast &&
727 (stctl & SCSW_STCTL_PRIM_STATUS)))
728 return 0;
729
730 if (ending_status)
731 ccw_device_set_timeout(cdev, 0);
732
733 if (cdev->handler)
734 cdev->handler(cdev, cdev->private->intparm,
37db8985 735 &cdev->private->dma_area->irb);
8421d212 736
37db8985 737 memset(&cdev->private->dma_area->irb, 0, sizeof(struct irb));
8421d212
SO		 738 return 1;
739}
740
1da177e4
LT		 741/*
742 * Got an interrupt for a normal io (state online).
743 */
744static void
745ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
746{
747 struct irb *irb;
83262d63 748 int is_cmd;
1da177e4 749
0bf7fcf1 750 irb = this_cpu_ptr(&cio_irb);
83262d63 751 is_cmd = !scsw_is_tm(&irb->scsw);
1da177e4 752 /* Check for unsolicited interrupt. */
23d805b6 753 if (!scsw_is_solicited(&irb->scsw)) {
83262d63 754 if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
1da177e4
LT		 755 !irb->esw.esw0.erw.cons) {
756 /* Unit check but no sense data. Need basic sense. */
757 if (ccw_device_do_sense(cdev, irb) != 0)
758 goto call_handler_unsol;
37db8985
HP		 759 memcpy(&cdev->private->dma_area->irb, irb,
760 sizeof(struct irb));
1da177e4
LT		 761 cdev->private->state = DEV_STATE_W4SENSE;
762 cdev->private->intparm = 0;
763 return;
764 }
765call_handler_unsol:
766 if (cdev->handler)
767 cdev->handler (cdev, 0, irb);
18374d37
CH		 768 if (cdev->private->flags.doverify)
769 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 770 return;
771 }
772 /* Accumulate status and find out if a basic sense is needed. */
773 ccw_device_accumulate_irb(cdev, irb);
83262d63 774 if (is_cmd && cdev->private->flags.dosense) {
1da177e4
LT		 775 if (ccw_device_do_sense(cdev, irb) == 0) {
776 cdev->private->state = DEV_STATE_W4SENSE;
777 }
778 return;
779 }
780 /* Call the handler. */
781 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
782 /* Start delayed path verification. */
783 ccw_device_online_verify(cdev, 0);
784}
785
786/*
787 * Got an timeout in online state.
788 */
789static void
790ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
791{
792 int ret;
793
794 ccw_device_set_timeout(cdev, 0);
376ae475 795 cdev->private->iretry = 255;
770b55c9 796 cdev->private->async_kill_io_rc = -ETIMEDOUT;
1da177e4
LT		 797 ret = ccw_device_cancel_halt_clear(cdev);
798 if (ret == -EBUSY) {
799 ccw_device_set_timeout(cdev, 3*HZ);
800 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
801 return;
802 }
376ae475 803 if (ret)
3f4cf6e7
CH		 804 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
805 else if (cdev->handler)
1da177e4
LT		 806 cdev->handler(cdev, cdev->private->intparm,
807 ERR_PTR(-ETIMEDOUT));
808}
809
810/*
811 * Got an interrupt for a basic sense.
812 */
2b67fc46 813static void
1da177e4
LT		 814ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
815{
816 struct irb *irb;
817
0bf7fcf1 818 irb = this_cpu_ptr(&cio_irb);
1da177e4 819 /* Check for unsolicited interrupt. */
23d805b6
PO		 820 if (scsw_stctl(&irb->scsw) ==
821 (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
822 if (scsw_cc(&irb->scsw) == 1)
1da177e4
LT		 823 /* Basic sense hasn't started. Try again. */
824 ccw_device_do_sense(cdev, irb);
825 else {
139b83dd 826 CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited "
e556bbbd
CH		 827 "interrupt during w4sense...\n",
828 cdev->private->dev_id.ssid,
829 cdev->private->dev_id.devno);
1da177e4
LT		 830 if (cdev->handler)
831 cdev->handler (cdev, 0, irb);
832 }
833 return;
834 }
3ba1998e
CH		 835 /*
836 * Check if a halt or clear has been issued in the meanwhile. If yes,
837 * only deliver the halt/clear interrupt to the device driver as if it
838 * had killed the original request.
839 */
23d805b6
PO		 840 if (scsw_fctl(&irb->scsw) &
841 (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
3ba1998e 842 cdev->private->flags.dosense = 0;
37db8985 843 memset(&cdev->private->dma_area->irb, 0, sizeof(struct irb));
3ba1998e
CH		 844 ccw_device_accumulate_irb(cdev, irb);
845 goto call_handler;
846 }
1da177e4
LT		 847 /* Add basic sense info to irb. */
848 ccw_device_accumulate_basic_sense(cdev, irb);
849 if (cdev->private->flags.dosense) {
850 /* Another basic sense is needed. */
851 ccw_device_do_sense(cdev, irb);
852 return;
853 }
3ba1998e 854call_handler:
1da177e4 855 cdev->private->state = DEV_STATE_ONLINE;
217ee6c6
ME		 856 /* In case sensing interfered with setting the device online */
857 wake_up(&cdev->private->wait_q);
1da177e4
LT		 858 /* Call the handler. */
859 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
860 /* Start delayed path verification. */
861 ccw_device_online_verify(cdev, 0);
862}
863
1da177e4
LT		 864static void
865ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
866{
1da177e4 867 ccw_device_set_timeout(cdev, 0);
7c8427c3
CH		 868 /* Start delayed path verification. */
869 ccw_device_online_verify(cdev, 0);
1da177e4 870 /* OK, i/o is dead now. Call interrupt handler. */
1da177e4
LT		 871 if (cdev->handler)
872 cdev->handler(cdev, cdev->private->intparm,
770b55c9 873 ERR_PTR(cdev->private->async_kill_io_rc));
1da177e4
LT		 874}
875
876static void
877ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
878{
879 int ret;
880
881 ret = ccw_device_cancel_halt_clear(cdev);
882 if (ret == -EBUSY) {
883 ccw_device_set_timeout(cdev, 3*HZ);
884 return;
885 }
7c8427c3
CH		 886 /* Start delayed path verification. */
887 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 888 if (cdev->handler)
889 cdev->handler(cdev, cdev->private->intparm,
770b55c9 890 ERR_PTR(cdev->private->async_kill_io_rc));
1da177e4
LT		 891}
892
c820de39 893void ccw_device_kill_io(struct ccw_device *cdev)
1da177e4
LT		 894{
895 int ret;
1da177e4 896
410d5e13 897 ccw_device_set_timeout(cdev, 0);
376ae475 898 cdev->private->iretry = 255;
770b55c9 899 cdev->private->async_kill_io_rc = -EIO;
1da177e4
LT		 900 ret = ccw_device_cancel_halt_clear(cdev);
901 if (ret == -EBUSY) {
902 ccw_device_set_timeout(cdev, 3*HZ);
903 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
904 return;
905 }
7c8427c3
CH		 906 /* Start delayed path verification. */
907 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 908 if (cdev->handler)
909 cdev->handler(cdev, cdev->private->intparm,
e7769b48 910 ERR_PTR(-EIO));
1da177e4
LT		 911}
912
913static void
28bdc6f6 914ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1da177e4 915{
28bdc6f6 916 /* Start verification after current task finished. */
7e560814 917 cdev->private->flags.doverify = 1;
1da177e4
LT		 918}
919
1da177e4
LT		 920static void
921ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
922{
923 struct subchannel *sch;
924
925 sch = to_subchannel(cdev->dev.parent);
5c2e5a0c 926 if (cio_enable_subchannel(sch, (u32)virt_to_phys(sch)) != 0)
1da177e4
LT		 927 /* Couldn't enable the subchannel for i/o. Sick device. */
928 return;
1da177e4
LT		 929 cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
930 ccw_device_sense_id_start(cdev);
931}
932
c820de39 933void ccw_device_trigger_reprobe(struct ccw_device *cdev)
1da177e4 934{
c820de39 935 struct subchannel *sch;
1da177e4 936
1da177e4
LT		 937 if (cdev->private->state != DEV_STATE_DISCONNECTED)
938 return;
939
c820de39 940 sch = to_subchannel(cdev->dev.parent);
1da177e4 941 /* Update some values. */
cdb912a4 942 if (cio_update_schib(sch))
7674da77 943 return;
1da177e4
LT		 944 /*
945 * The pim, pam, pom values may not be accurate, but they are the best
946 * we have before performing device selection :/
947 */
28bdc6f6 948 sch->lpm = sch->schib.pmcw.pam & sch->opm;
13952ec1
SO		 949 /*
950 * Use the initial configuration since we can't be shure that the old
951 * paths are valid.
952 */
953 io_subchannel_init_config(sch);
f444cc0e
SO		 954 if (cio_commit_config(sch))
955 return;
13952ec1 956
1da177e4 957 /* We should also udate ssd info, but this has to wait. */
d7b5a4c9 958 /* Check if this is another device which appeared on the same sch. */
5d6e6b6f
PO		 959 if (sch->schib.pmcw.dev != cdev->private->dev_id.devno)
960 css_schedule_eval(sch->schid);
961 else
d7b5a4c9 962 ccw_device_start_id(cdev, 0);
1da177e4
LT		 963}
964
16b9a057
PO		 965static void ccw_device_disabled_irq(struct ccw_device *cdev,
966 enum dev_event dev_event)
1da177e4
LT		 967{
968 struct subchannel *sch;
969
970 sch = to_subchannel(cdev->dev.parent);
971 /*
16b9a057 972 * An interrupt in a disabled state means a previous disable was not
ed04b892 973 * successful - should not happen, but we try to disable again.
1da177e4
LT		 974 */
975 cio_disable_subchannel(sch);
976}
977
978static void
979ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
980{
981 retry_set_schib(cdev);
982 cdev->private->state = DEV_STATE_ONLINE;
983 dev_fsm_event(cdev, dev_event);
984}
985
94bb0633
CH		 986static void ccw_device_update_cmfblock(struct ccw_device *cdev,
987 enum dev_event dev_event)
988{
989 cmf_retry_copy_block(cdev);
990 cdev->private->state = DEV_STATE_ONLINE;
991 dev_fsm_event(cdev, dev_event);
992}
1da177e4
LT		 993
994static void
995ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
996{
997 ccw_device_set_timeout(cdev, 0);
56e6b796 998 cdev->private->state = DEV_STATE_NOT_OPER;
1da177e4
LT		 999 wake_up(&cdev->private->wait_q);
1000}
1001
1002static void
1003ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1004{
1005 int ret;
1006
1007 ret = ccw_device_cancel_halt_clear(cdev);
56e6b796
SO		 1008 if (ret == -EBUSY) {
1009 ccw_device_set_timeout(cdev, HZ/10);
1010 } else {
1da177e4
LT		 1011 cdev->private->state = DEV_STATE_NOT_OPER;
1012 wake_up(&cdev->private->wait_q);
1da177e4
LT		 1013 }
1014}
1015
1016/*
1017 * No operation action. This is used e.g. to ignore a timeout event in
1018 * state offline.
1019 */
1020static void
1021ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1022{
1023}
1024
1da177e4
LT		 1025/*
1026 * device statemachine
1027 */
1028fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1029 [DEV_STATE_NOT_OPER] = {
1030 [DEV_EVENT_NOTOPER] = ccw_device_nop,
16b9a057 1031 [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq,
1da177e4
LT		 1032 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1033 [DEV_EVENT_VERIFY] = ccw_device_nop,
1034 },
1da177e4 1035 [DEV_STATE_SENSE_ID] = {
39f5360b
PO		 1036 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1037 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1038 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1da177e4
LT		 1039 [DEV_EVENT_VERIFY] = ccw_device_nop,
1040 },
1041 [DEV_STATE_OFFLINE] = {
3f4cf6e7 1042 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
16b9a057 1043 [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq,
1da177e4 1044 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1f1148c8 1045 [DEV_EVENT_VERIFY] = ccw_device_offline_verify,
1da177e4
LT		 1046 },
1047 [DEV_STATE_VERIFY] = {
9679baaf
PO		 1048 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1049 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1050 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
28bdc6f6 1051 [DEV_EVENT_VERIFY] = ccw_device_delay_verify,
1da177e4
LT		 1052 },
1053 [DEV_STATE_ONLINE] = {
3f4cf6e7 1054 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1055 [DEV_EVENT_INTERRUPT] = ccw_device_irq,
1056 [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout,
1057 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1058 },
1059 [DEV_STATE_W4SENSE] = {
3f4cf6e7 1060 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1061 [DEV_EVENT_INTERRUPT] = ccw_device_w4sense,
1062 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1063 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1064 },
1065 [DEV_STATE_DISBAND_PGID] = {
9679baaf
PO		 1066 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1067 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1068 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1da177e4
LT		 1069 [DEV_EVENT_VERIFY] = ccw_device_nop,
1070 },
1071 [DEV_STATE_BOXED] = {
3f4cf6e7 1072 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
d7d12ef2
PO		 1073 [DEV_EVENT_INTERRUPT] = ccw_device_nop,
1074 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1075 [DEV_EVENT_VERIFY] = ccw_device_boxed_verify,
1da177e4
LT		 1076 },
1077 /* states to wait for i/o completion before doing something */
1da177e4 1078 [DEV_STATE_TIMEOUT_KILL] = {
3f4cf6e7 1079 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1080 [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq,
1081 [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout,
1082 [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME
1083 },
1da177e4
LT		 1084 [DEV_STATE_QUIESCE] = {
1085 [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done,
1086 [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done,
1087 [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout,
1088 [DEV_EVENT_VERIFY] = ccw_device_nop,
1089 },
1090 /* special states for devices gone not operational */
1091 [DEV_STATE_DISCONNECTED] = {
1092 [DEV_EVENT_NOTOPER] = ccw_device_nop,
1093 [DEV_EVENT_INTERRUPT] = ccw_device_start_id,
16b9a057 1094 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
28bdc6f6 1095 [DEV_EVENT_VERIFY] = ccw_device_start_id,
1da177e4
LT		 1096 },
1097 [DEV_STATE_DISCONNECTED_SENSE_ID] = {
39f5360b
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_CMFCHANGE] = {
1104 [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate,
1105 [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate,
1106 [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate,
1107 [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate,
1108 },
94bb0633
CH		 1109 [DEV_STATE_CMFUPDATE] = {
1110 [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock,
1111 [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock,
1112 [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock,
1113 [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock,
1114 },
d7d12ef2
PO		 1115 [DEV_STATE_STEAL_LOCK] = {
1116 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1117 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1118 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1119 [DEV_EVENT_VERIFY] = ccw_device_nop,
1120 },
1da177e4
LT		 1121};
1122
1da177e4 1123EXPORT_SYMBOL_GPL(ccw_device_set_timeout);
Linux 6.x block layer and io_uring tree(s)