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Linux 6.10-rc3
[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,
9ff91a33 67 dma32_to_virt(orb->tm.tcw),
83262d63
PO		 68 sizeof(struct tcw), 0);
69 } else {
70 printk(KERN_WARNING "cio: orb indicates command mode\n");
9ff91a33 71 if (dma32_to_virt(orb->cmd.cpa) ==
37db8985 72 &private->dma_area->sense_ccw ||
9ff91a33 73 dma32_to_virt(orb->cmd.cpa) ==
37db8985 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,
9ff91a33 81 dma32_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) {
cada938a 313 /* Re-enable 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) {
6f76592e
PO		 507 CIO_MSG_EVENT(2, "fakeirb: deliver device 0.%x.%04x intparm %lx type=%d\n",
508 cdev->private->dev_id.ssid,
509 cdev->private->dev_id.devno,
510 cdev->private->intparm,
511 cdev->private->flags.fake_irb);
37db8985 512 create_fake_irb(&cdev->private->dma_area->irb,
50c8e31f 513 cdev->private->flags.fake_irb);
1da177e4
LT		 514 cdev->private->flags.fake_irb = 0;
515 if (cdev->handler)
516 cdev->handler(cdev, cdev->private->intparm,
37db8985
HP		 517 &cdev->private->dma_area->irb);
518 memset(&cdev->private->dma_area->irb, 0,
519 sizeof(struct irb));
1da177e4 520 }
585b954e 521 ccw_device_report_path_events(cdev);
55fb7347 522 ccw_device_handle_broken_paths(cdev);
1da177e4
LT		 523 break;
524 case -ETIME:
52ef0608 525 case -EUSERS:
8b42f5c2
PO		 526 /* Reset oper notify indication after verify error. */
527 cdev->private->flags.donotify = 0;
1da177e4
LT		 528 ccw_device_done(cdev, DEV_STATE_BOXED);
529 break;
7c4d964f
PO		 530 case -EACCES:
531 /* Reset oper notify indication after verify error. */
532 cdev->private->flags.donotify = 0;
533 ccw_device_done(cdev, DEV_STATE_DISCONNECTED);
534 break;
1da177e4 535 default:
8b42f5c2
PO		 536 /* Reset oper notify indication after verify error. */
537 cdev->private->flags.donotify = 0;
7c4d964f 538 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
1da177e4
LT		 539 break;
540 }
585b954e 541 ccw_device_reset_path_events(cdev);
1da177e4
LT		 542}
543
544/*
545 * Get device online.
546 */
547int
548ccw_device_online(struct ccw_device *cdev)
549{
550 struct subchannel *sch;
551 int ret;
552
553 if ((cdev->private->state != DEV_STATE_OFFLINE) &&
554 (cdev->private->state != DEV_STATE_BOXED))
555 return -EINVAL;
556 sch = to_subchannel(cdev->dev.parent);
5c2e5a0c 557 ret = cio_enable_subchannel(sch, (u32)virt_to_phys(sch));
1da177e4
LT		 558 if (ret != 0) {
559 /* Couldn't enable the subchannel for i/o. Sick device. */
560 if (ret == -ENODEV)
561 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
562 return ret;
563 }
52ef0608
PO		 564 /* Start initial path verification. */
565 cdev->private->state = DEV_STATE_VERIFY;
566 ccw_device_verify_start(cdev);
1da177e4
LT		 567 return 0;
568}
569
570void
571ccw_device_disband_done(struct ccw_device *cdev, int err)
572{
573 switch (err) {
574 case 0:
575 ccw_device_done(cdev, DEV_STATE_OFFLINE);
576 break;
577 case -ETIME:
578 ccw_device_done(cdev, DEV_STATE_BOXED);
579 break;
580 default:
3ecb0a5a 581 cdev->private->flags.donotify = 0;
1da177e4
LT		 582 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
583 break;
584 }
585}
586
587/*
588 * Shutdown device.
589 */
590int
591ccw_device_offline(struct ccw_device *cdev)
592{
593 struct subchannel *sch;
594
b301ea8c
PO		 595 /* Allow ccw_device_offline while disconnected. */
596 if (cdev->private->state == DEV_STATE_DISCONNECTED ||
597 cdev->private->state == DEV_STATE_NOT_OPER) {
598 cdev->private->flags.donotify = 0;
599 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
600 return 0;
601 }
102e835d
PO		 602 if (cdev->private->state == DEV_STATE_BOXED) {
603 ccw_device_done(cdev, DEV_STATE_BOXED);
604 return 0;
605 }
d7b5a4c9
CH		 606 if (ccw_device_is_orphan(cdev)) {
607 ccw_device_done(cdev, DEV_STATE_OFFLINE);
608 return 0;
609 }
1da177e4 610 sch = to_subchannel(cdev->dev.parent);
cdb912a4 611 if (cio_update_schib(sch))
1da177e4 612 return -ENODEV;
23d805b6 613 if (scsw_actl(&sch->schib.scsw) != 0)
1da177e4 614 return -EBUSY;
23d805b6
PO		 615 if (cdev->private->state != DEV_STATE_ONLINE)
616 return -EINVAL;
1da177e4 617 /* Are we doing path grouping? */
454e1fa1 618 if (!cdev->private->flags.pgroup) {
1da177e4
LT		 619 /* No, set state offline immediately. */
620 ccw_device_done(cdev, DEV_STATE_OFFLINE);
621 return 0;
622 }
623 /* Start Set Path Group commands. */
624 cdev->private->state = DEV_STATE_DISBAND_PGID;
625 ccw_device_disband_start(cdev);
626 return 0;
627}
628
1da177e4 629/*
3f4cf6e7 630 * Handle not operational event in non-special state.
1da177e4 631 */
3f4cf6e7
CH		 632static void ccw_device_generic_notoper(struct ccw_device *cdev,
633 enum dev_event dev_event)
1da177e4 634{
76e6fb4b 635 if (ccw_device_notify(cdev, CIO_GONE) != NOTIFY_OK)
37de53bb 636 ccw_device_sched_todo(cdev, CDEV_TODO_UNREG);
6afcc775
PO		 637 else
638 ccw_device_set_disconnected(cdev);
1da177e4
LT		 639}
640
1f1148c8
PO		 641/*
642 * Handle path verification event in offline state.
643 */
644static void ccw_device_offline_verify(struct ccw_device *cdev,
645 enum dev_event dev_event)
646{
647 struct subchannel *sch = to_subchannel(cdev->dev.parent);
648
649 css_schedule_eval(sch->schid);
650}
651
1da177e4
LT		 652/*
653 * Handle path verification event.
654 */
655static void
656ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
657{
658 struct subchannel *sch;
659
1da177e4
LT		 660 if (cdev->private->state == DEV_STATE_W4SENSE) {
661 cdev->private->flags.doverify = 1;
662 return;
663 }
664 sch = to_subchannel(cdev->dev.parent);
665 /*
666 * Since we might not just be coming from an interrupt from the
667 * subchannel we have to update the schib.
668 */
cdb912a4
SO		 669 if (cio_update_schib(sch)) {
670 ccw_device_verify_done(cdev, -ENODEV);
671 return;
672 }
1da177e4 673
23d805b6
PO		 674 if (scsw_actl(&sch->schib.scsw) != 0 ||
675 (scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
37db8985
HP		 676 (scsw_stctl(&cdev->private->dma_area->irb.scsw) &
677 SCSW_STCTL_STATUS_PEND)) {
1da177e4
LT		 678 /*
679 * No final status yet or final status not yet delivered
25985edc 680 * to the device driver. Can't do path verification now,
1da177e4
LT		 681 * delay until final status was delivered.
682 */
683 cdev->private->flags.doverify = 1;
684 return;
685 }
686 /* Device is idle, we can do the path verification. */
687 cdev->private->state = DEV_STATE_VERIFY;
688 ccw_device_verify_start(cdev);
689}
690
d7d12ef2
PO		 691/*
692 * Handle path verification event in boxed state.
693 */
694static void ccw_device_boxed_verify(struct ccw_device *cdev,
695 enum dev_event dev_event)
696{
697 struct subchannel *sch = to_subchannel(cdev->dev.parent);
698
699 if (cdev->online) {
5c2e5a0c 700 if (cio_enable_subchannel(sch, (u32)virt_to_phys(sch)))
d7d12ef2
PO		 701 ccw_device_done(cdev, DEV_STATE_NOT_OPER);
702 else
703 ccw_device_online_verify(cdev, dev_event);
704 } else
705 css_schedule_eval(sch->schid);
706}
707
8421d212
SO		 708/*
709 * Pass interrupt to device driver.
710 */
711static int ccw_device_call_handler(struct ccw_device *cdev)
712{
713 unsigned int stctl;
714 int ending_status;
715
716 /*
717 * we allow for the device action handler if .
718 * - we received ending status
719 * - the action handler requested to see all interrupts
720 * - we received an intermediate status
721 * - fast notification was requested (primary status)
722 * - unsolicited interrupts
723 */
37db8985 724 stctl = scsw_stctl(&cdev->private->dma_area->irb.scsw);
8421d212
SO		 725 ending_status = (stctl & SCSW_STCTL_SEC_STATUS) ||
726 (stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) ||
727 (stctl == SCSW_STCTL_STATUS_PEND);
728 if (!ending_status &&
729 !cdev->private->options.repall &&
730 !(stctl & SCSW_STCTL_INTER_STATUS) &&
731 !(cdev->private->options.fast &&
732 (stctl & SCSW_STCTL_PRIM_STATUS)))
733 return 0;
734
735 if (ending_status)
736 ccw_device_set_timeout(cdev, 0);
737
738 if (cdev->handler)
739 cdev->handler(cdev, cdev->private->intparm,
37db8985 740 &cdev->private->dma_area->irb);
8421d212 741
37db8985 742 memset(&cdev->private->dma_area->irb, 0, sizeof(struct irb));
8421d212
SO		 743 return 1;
744}
745
1da177e4
LT		 746/*
747 * Got an interrupt for a normal io (state online).
748 */
749static void
750ccw_device_irq(struct ccw_device *cdev, enum dev_event dev_event)
751{
752 struct irb *irb;
83262d63 753 int is_cmd;
1da177e4 754
0bf7fcf1 755 irb = this_cpu_ptr(&cio_irb);
83262d63 756 is_cmd = !scsw_is_tm(&irb->scsw);
1da177e4 757 /* Check for unsolicited interrupt. */
23d805b6 758 if (!scsw_is_solicited(&irb->scsw)) {
83262d63 759 if (is_cmd && (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) &&
1da177e4
LT		 760 !irb->esw.esw0.erw.cons) {
761 /* Unit check but no sense data. Need basic sense. */
762 if (ccw_device_do_sense(cdev, irb) != 0)
763 goto call_handler_unsol;
37db8985
HP		 764 memcpy(&cdev->private->dma_area->irb, irb,
765 sizeof(struct irb));
1da177e4
LT		 766 cdev->private->state = DEV_STATE_W4SENSE;
767 cdev->private->intparm = 0;
768 return;
769 }
770call_handler_unsol:
771 if (cdev->handler)
772 cdev->handler (cdev, 0, irb);
18374d37
CH		 773 if (cdev->private->flags.doverify)
774 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 775 return;
776 }
777 /* Accumulate status and find out if a basic sense is needed. */
778 ccw_device_accumulate_irb(cdev, irb);
83262d63 779 if (is_cmd && cdev->private->flags.dosense) {
1da177e4
LT		 780 if (ccw_device_do_sense(cdev, irb) == 0) {
781 cdev->private->state = DEV_STATE_W4SENSE;
782 }
783 return;
784 }
785 /* Call the handler. */
786 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
787 /* Start delayed path verification. */
788 ccw_device_online_verify(cdev, 0);
789}
790
791/*
792 * Got an timeout in online state.
793 */
794static void
795ccw_device_online_timeout(struct ccw_device *cdev, enum dev_event dev_event)
796{
797 int ret;
798
799 ccw_device_set_timeout(cdev, 0);
376ae475 800 cdev->private->iretry = 255;
770b55c9 801 cdev->private->async_kill_io_rc = -ETIMEDOUT;
1da177e4
LT		 802 ret = ccw_device_cancel_halt_clear(cdev);
803 if (ret == -EBUSY) {
804 ccw_device_set_timeout(cdev, 3*HZ);
805 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
806 return;
807 }
376ae475 808 if (ret)
3f4cf6e7
CH		 809 dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
810 else if (cdev->handler)
1da177e4
LT		 811 cdev->handler(cdev, cdev->private->intparm,
812 ERR_PTR(-ETIMEDOUT));
813}
814
815/*
816 * Got an interrupt for a basic sense.
817 */
2b67fc46 818static void
1da177e4
LT		 819ccw_device_w4sense(struct ccw_device *cdev, enum dev_event dev_event)
820{
821 struct irb *irb;
822
0bf7fcf1 823 irb = this_cpu_ptr(&cio_irb);
1da177e4 824 /* Check for unsolicited interrupt. */
23d805b6
PO		 825 if (scsw_stctl(&irb->scsw) ==
826 (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) {
827 if (scsw_cc(&irb->scsw) == 1)
1da177e4
LT		 828 /* Basic sense hasn't started. Try again. */
829 ccw_device_do_sense(cdev, irb);
830 else {
139b83dd 831 CIO_MSG_EVENT(0, "0.%x.%04x: unsolicited "
e556bbbd
CH		 832 "interrupt during w4sense...\n",
833 cdev->private->dev_id.ssid,
834 cdev->private->dev_id.devno);
1da177e4
LT		 835 if (cdev->handler)
836 cdev->handler (cdev, 0, irb);
837 }
838 return;
839 }
3ba1998e
CH		 840 /*
841 * Check if a halt or clear has been issued in the meanwhile. If yes,
842 * only deliver the halt/clear interrupt to the device driver as if it
843 * had killed the original request.
844 */
23d805b6
PO		 845 if (scsw_fctl(&irb->scsw) &
846 (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC)) {
3ba1998e 847 cdev->private->flags.dosense = 0;
37db8985 848 memset(&cdev->private->dma_area->irb, 0, sizeof(struct irb));
3ba1998e
CH		 849 ccw_device_accumulate_irb(cdev, irb);
850 goto call_handler;
851 }
1da177e4
LT		 852 /* Add basic sense info to irb. */
853 ccw_device_accumulate_basic_sense(cdev, irb);
854 if (cdev->private->flags.dosense) {
855 /* Another basic sense is needed. */
856 ccw_device_do_sense(cdev, irb);
857 return;
858 }
3ba1998e 859call_handler:
1da177e4 860 cdev->private->state = DEV_STATE_ONLINE;
217ee6c6
ME		 861 /* In case sensing interfered with setting the device online */
862 wake_up(&cdev->private->wait_q);
1da177e4
LT		 863 /* Call the handler. */
864 if (ccw_device_call_handler(cdev) && cdev->private->flags.doverify)
865 /* Start delayed path verification. */
866 ccw_device_online_verify(cdev, 0);
867}
868
1da177e4
LT		 869static void
870ccw_device_killing_irq(struct ccw_device *cdev, enum dev_event dev_event)
871{
1da177e4 872 ccw_device_set_timeout(cdev, 0);
7c8427c3
CH		 873 /* Start delayed path verification. */
874 ccw_device_online_verify(cdev, 0);
1da177e4 875 /* OK, i/o is dead now. Call interrupt handler. */
1da177e4
LT		 876 if (cdev->handler)
877 cdev->handler(cdev, cdev->private->intparm,
770b55c9 878 ERR_PTR(cdev->private->async_kill_io_rc));
1da177e4
LT		 879}
880
881static void
882ccw_device_killing_timeout(struct ccw_device *cdev, enum dev_event dev_event)
883{
884 int ret;
885
886 ret = ccw_device_cancel_halt_clear(cdev);
887 if (ret == -EBUSY) {
888 ccw_device_set_timeout(cdev, 3*HZ);
889 return;
890 }
7c8427c3
CH		 891 /* Start delayed path verification. */
892 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 893 if (cdev->handler)
894 cdev->handler(cdev, cdev->private->intparm,
770b55c9 895 ERR_PTR(cdev->private->async_kill_io_rc));
1da177e4
LT		 896}
897
c820de39 898void ccw_device_kill_io(struct ccw_device *cdev)
1da177e4
LT		 899{
900 int ret;
1da177e4 901
410d5e13 902 ccw_device_set_timeout(cdev, 0);
376ae475 903 cdev->private->iretry = 255;
770b55c9 904 cdev->private->async_kill_io_rc = -EIO;
1da177e4
LT		 905 ret = ccw_device_cancel_halt_clear(cdev);
906 if (ret == -EBUSY) {
907 ccw_device_set_timeout(cdev, 3*HZ);
908 cdev->private->state = DEV_STATE_TIMEOUT_KILL;
909 return;
910 }
7c8427c3
CH		 911 /* Start delayed path verification. */
912 ccw_device_online_verify(cdev, 0);
1da177e4
LT		 913 if (cdev->handler)
914 cdev->handler(cdev, cdev->private->intparm,
e7769b48 915 ERR_PTR(-EIO));
1da177e4
LT		 916}
917
918static void
28bdc6f6 919ccw_device_delay_verify(struct ccw_device *cdev, enum dev_event dev_event)
1da177e4 920{
28bdc6f6 921 /* Start verification after current task finished. */
7e560814 922 cdev->private->flags.doverify = 1;
1da177e4
LT		 923}
924
1da177e4
LT		 925static void
926ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
927{
928 struct subchannel *sch;
929
930 sch = to_subchannel(cdev->dev.parent);
5c2e5a0c 931 if (cio_enable_subchannel(sch, (u32)virt_to_phys(sch)) != 0)
1da177e4
LT		 932 /* Couldn't enable the subchannel for i/o. Sick device. */
933 return;
1da177e4
LT		 934 cdev->private->state = DEV_STATE_DISCONNECTED_SENSE_ID;
935 ccw_device_sense_id_start(cdev);
936}
937
c820de39 938void ccw_device_trigger_reprobe(struct ccw_device *cdev)
1da177e4 939{
c820de39 940 struct subchannel *sch;
1da177e4 941
1da177e4
LT		 942 if (cdev->private->state != DEV_STATE_DISCONNECTED)
943 return;
944
c820de39 945 sch = to_subchannel(cdev->dev.parent);
1da177e4 946 /* Update some values. */
cdb912a4 947 if (cio_update_schib(sch))
7674da77 948 return;
1da177e4
LT		 949 /*
950 * The pim, pam, pom values may not be accurate, but they are the best
951 * we have before performing device selection :/
952 */
28bdc6f6 953 sch->lpm = sch->schib.pmcw.pam & sch->opm;
13952ec1 954 /*
cada938a 955 * Use the initial configuration since we can't be sure that the old
13952ec1
SO		 956 * paths are valid.
957 */
958 io_subchannel_init_config(sch);
f444cc0e
SO		 959 if (cio_commit_config(sch))
960 return;
13952ec1 961
1da177e4 962 /* We should also udate ssd info, but this has to wait. */
d7b5a4c9 963 /* Check if this is another device which appeared on the same sch. */
5d6e6b6f
PO		 964 if (sch->schib.pmcw.dev != cdev->private->dev_id.devno)
965 css_schedule_eval(sch->schid);
966 else
d7b5a4c9 967 ccw_device_start_id(cdev, 0);
1da177e4
LT		 968}
969
16b9a057
PO		 970static void ccw_device_disabled_irq(struct ccw_device *cdev,
971 enum dev_event dev_event)
1da177e4
LT		 972{
973 struct subchannel *sch;
974
975 sch = to_subchannel(cdev->dev.parent);
976 /*
16b9a057 977 * An interrupt in a disabled state means a previous disable was not
ed04b892 978 * successful - should not happen, but we try to disable again.
1da177e4
LT		 979 */
980 cio_disable_subchannel(sch);
981}
982
983static void
984ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event)
985{
986 retry_set_schib(cdev);
987 cdev->private->state = DEV_STATE_ONLINE;
988 dev_fsm_event(cdev, dev_event);
989}
990
94bb0633
CH		 991static void ccw_device_update_cmfblock(struct ccw_device *cdev,
992 enum dev_event dev_event)
993{
994 cmf_retry_copy_block(cdev);
995 cdev->private->state = DEV_STATE_ONLINE;
996 dev_fsm_event(cdev, dev_event);
997}
1da177e4
LT		 998
999static void
1000ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event)
1001{
1002 ccw_device_set_timeout(cdev, 0);
56e6b796 1003 cdev->private->state = DEV_STATE_NOT_OPER;
1da177e4
LT		 1004 wake_up(&cdev->private->wait_q);
1005}
1006
1007static void
1008ccw_device_quiesce_timeout(struct ccw_device *cdev, enum dev_event dev_event)
1009{
1010 int ret;
1011
1012 ret = ccw_device_cancel_halt_clear(cdev);
56e6b796
SO		 1013 if (ret == -EBUSY) {
1014 ccw_device_set_timeout(cdev, HZ/10);
1015 } else {
1da177e4
LT		 1016 cdev->private->state = DEV_STATE_NOT_OPER;
1017 wake_up(&cdev->private->wait_q);
1da177e4
LT		 1018 }
1019}
1020
1021/*
1022 * No operation action. This is used e.g. to ignore a timeout event in
1023 * state offline.
1024 */
1025static void
1026ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
1027{
1028}
1029
1da177e4
LT		 1030/*
1031 * device statemachine
1032 */
1033fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
1034 [DEV_STATE_NOT_OPER] = {
1035 [DEV_EVENT_NOTOPER] = ccw_device_nop,
16b9a057 1036 [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq,
1da177e4
LT		 1037 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1038 [DEV_EVENT_VERIFY] = ccw_device_nop,
1039 },
1da177e4 1040 [DEV_STATE_SENSE_ID] = {
39f5360b
PO		 1041 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1042 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1043 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1da177e4
LT		 1044 [DEV_EVENT_VERIFY] = ccw_device_nop,
1045 },
1046 [DEV_STATE_OFFLINE] = {
3f4cf6e7 1047 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
16b9a057 1048 [DEV_EVENT_INTERRUPT] = ccw_device_disabled_irq,
1da177e4 1049 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1f1148c8 1050 [DEV_EVENT_VERIFY] = ccw_device_offline_verify,
1da177e4
LT		 1051 },
1052 [DEV_STATE_VERIFY] = {
9679baaf
PO		 1053 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1054 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1055 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
28bdc6f6 1056 [DEV_EVENT_VERIFY] = ccw_device_delay_verify,
1da177e4
LT		 1057 },
1058 [DEV_STATE_ONLINE] = {
3f4cf6e7 1059 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1060 [DEV_EVENT_INTERRUPT] = ccw_device_irq,
1061 [DEV_EVENT_TIMEOUT] = ccw_device_online_timeout,
1062 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1063 },
1064 [DEV_STATE_W4SENSE] = {
3f4cf6e7 1065 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1066 [DEV_EVENT_INTERRUPT] = ccw_device_w4sense,
1067 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1068 [DEV_EVENT_VERIFY] = ccw_device_online_verify,
1069 },
1070 [DEV_STATE_DISBAND_PGID] = {
9679baaf
PO		 1071 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1072 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1073 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1da177e4
LT		 1074 [DEV_EVENT_VERIFY] = ccw_device_nop,
1075 },
1076 [DEV_STATE_BOXED] = {
3f4cf6e7 1077 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
d7d12ef2
PO		 1078 [DEV_EVENT_INTERRUPT] = ccw_device_nop,
1079 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
1080 [DEV_EVENT_VERIFY] = ccw_device_boxed_verify,
1da177e4
LT		 1081 },
1082 /* states to wait for i/o completion before doing something */
1da177e4 1083 [DEV_STATE_TIMEOUT_KILL] = {
3f4cf6e7 1084 [DEV_EVENT_NOTOPER] = ccw_device_generic_notoper,
1da177e4
LT		 1085 [DEV_EVENT_INTERRUPT] = ccw_device_killing_irq,
1086 [DEV_EVENT_TIMEOUT] = ccw_device_killing_timeout,
1087 [DEV_EVENT_VERIFY] = ccw_device_nop, //FIXME
1088 },
1da177e4
LT		 1089 [DEV_STATE_QUIESCE] = {
1090 [DEV_EVENT_NOTOPER] = ccw_device_quiesce_done,
1091 [DEV_EVENT_INTERRUPT] = ccw_device_quiesce_done,
1092 [DEV_EVENT_TIMEOUT] = ccw_device_quiesce_timeout,
1093 [DEV_EVENT_VERIFY] = ccw_device_nop,
1094 },
1095 /* special states for devices gone not operational */
1096 [DEV_STATE_DISCONNECTED] = {
1097 [DEV_EVENT_NOTOPER] = ccw_device_nop,
1098 [DEV_EVENT_INTERRUPT] = ccw_device_start_id,
16b9a057 1099 [DEV_EVENT_TIMEOUT] = ccw_device_nop,
28bdc6f6 1100 [DEV_EVENT_VERIFY] = ccw_device_start_id,
1da177e4
LT		 1101 },
1102 [DEV_STATE_DISCONNECTED_SENSE_ID] = {
39f5360b
PO		 1103 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1104 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1105 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1da177e4
LT		 1106 [DEV_EVENT_VERIFY] = ccw_device_nop,
1107 },
1108 [DEV_STATE_CMFCHANGE] = {
1109 [DEV_EVENT_NOTOPER] = ccw_device_change_cmfstate,
1110 [DEV_EVENT_INTERRUPT] = ccw_device_change_cmfstate,
1111 [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate,
1112 [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate,
1113 },
94bb0633
CH		 1114 [DEV_STATE_CMFUPDATE] = {
1115 [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock,
1116 [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock,
1117 [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock,
1118 [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock,
1119 },
d7d12ef2
PO		 1120 [DEV_STATE_STEAL_LOCK] = {
1121 [DEV_EVENT_NOTOPER] = ccw_device_request_event,
1122 [DEV_EVENT_INTERRUPT] = ccw_device_request_event,
1123 [DEV_EVENT_TIMEOUT] = ccw_device_request_event,
1124 [DEV_EVENT_VERIFY] = ccw_device_nop,
1125 },
1da177e4
LT		 1126};
1127
1da177e4 1128EXPORT_SYMBOL_GPL(ccw_device_set_timeout);
Linux 6.x block layer and io_uring tree(s)