aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/s390/cio/device_ops.c
blob: a5d263fb55ae1722ff0aced679d55df0978e7546 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
/*
 *  drivers/s390/cio/device_ops.c
 *
 *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
 *			 IBM Corporation
 *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
 *               Cornelia Huck (cornelia.huck@de.ibm.com)
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/device.h>
#include <linux/delay.h>

#include <asm/ccwdev.h>
#include <asm/idals.h>
#include <asm/chpid.h>

#include "cio.h"
#include "cio_debug.h"
#include "css.h"
#include "chsc.h"
#include "device.h"
#include "chp.h"

int ccw_device_set_options_mask(struct ccw_device *cdev, unsigned long flags)
{
       /*
	* The flag usage is mutal exclusive ...
	*/
	if ((flags & CCWDEV_EARLY_NOTIFICATION) &&
	    (flags & CCWDEV_REPORT_ALL))
		return -EINVAL;
	cdev->private->options.fast = (flags & CCWDEV_EARLY_NOTIFICATION) != 0;
	cdev->private->options.repall = (flags & CCWDEV_REPORT_ALL) != 0;
	cdev->private->options.pgroup = (flags & CCWDEV_DO_PATHGROUP) != 0;
	cdev->private->options.force = (flags & CCWDEV_ALLOW_FORCE) != 0;
	return 0;
}

int ccw_device_set_options(struct ccw_device *cdev, unsigned long flags)
{
       /*
	* The flag usage is mutal exclusive ...
	*/
	if (((flags & CCWDEV_EARLY_NOTIFICATION) &&
	    (flags & CCWDEV_REPORT_ALL)) ||
	    ((flags & CCWDEV_EARLY_NOTIFICATION) &&
	     cdev->private->options.repall) ||
	    ((flags & CCWDEV_REPORT_ALL) &&
	     cdev->private->options.fast))
		return -EINVAL;
	cdev->private->options.fast |= (flags & CCWDEV_EARLY_NOTIFICATION) != 0;
	cdev->private->options.repall |= (flags & CCWDEV_REPORT_ALL) != 0;
	cdev->private->options.pgroup |= (flags & CCWDEV_DO_PATHGROUP) != 0;
	cdev->private->options.force |= (flags & CCWDEV_ALLOW_FORCE) != 0;
	return 0;
}

void ccw_device_clear_options(struct ccw_device *cdev, unsigned long flags)
{
	cdev->private->options.fast &= (flags & CCWDEV_EARLY_NOTIFICATION) == 0;
	cdev->private->options.repall &= (flags & CCWDEV_REPORT_ALL) == 0;
	cdev->private->options.pgroup &= (flags & CCWDEV_DO_PATHGROUP) == 0;
	cdev->private->options.force &= (flags & CCWDEV_ALLOW_FORCE) == 0;
}

int
ccw_device_clear(struct ccw_device *cdev, unsigned long intparm)
{
	struct subchannel *sch;
	int ret;

	if (!cdev)
		return -ENODEV;
	if (cdev->private->state == DEV_STATE_NOT_OPER)
		return -ENODEV;
	if (cdev->private->state != DEV_STATE_ONLINE &&
	    cdev->private->state != DEV_STATE_W4SENSE)
		return -EINVAL;
	sch = to_subchannel(cdev->dev.parent);
	if (!sch)
		return -ENODEV;
	ret = cio_clear(sch);
	if (ret == 0)
		cdev->private->intparm = intparm;
	return ret;
}

int
ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
		     unsigned long intparm, __u8 lpm, __u8 key,
		     unsigned long flags)
{
	struct subchannel *sch;
	int ret;

	if (!cdev)
		return -ENODEV;
	sch = to_subchannel(cdev->dev.parent);
	if (!sch)
		return -ENODEV;
	if (cdev->private->state == DEV_STATE_NOT_OPER)
		return -ENODEV;
	if (cdev->private->state == DEV_STATE_VERIFY ||
	    cdev->private->state == DEV_STATE_CLEAR_VERIFY) {
		/* Remember to fake irb when finished. */
		if (!cdev->private->flags.fake_irb) {
			cdev->private->flags.fake_irb = 1;
			cdev->private->intparm = intparm;
			return 0;
		} else
			/* There's already a fake I/O around. */
			return -EBUSY;
	}
	if (cdev->private->state != DEV_STATE_ONLINE ||
	    ((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) &&
	     !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) ||
	    cdev->private->flags.doverify)
		return -EBUSY;
	ret = cio_set_options (sch, flags);
	if (ret)
		return ret;
	/* Adjust requested path mask to excluded varied off paths. */
	if (lpm) {
		lpm &= sch->opm;
		if (lpm == 0)
			return -EACCES;
	}
	ret = cio_start_key (sch, cpa, lpm, key);
	if (ret == 0)
		cdev->private->intparm = intparm;
	return ret;
}


int
ccw_device_start_timeout_key(struct ccw_device *cdev, struct ccw1 *cpa,
			     unsigned long intparm, __u8 lpm, __u8 key,
			     unsigned long flags, int expires)
{
	int ret;

	if (!cdev)
		return -ENODEV;
	ccw_device_set_timeout(cdev, expires);
	ret = ccw_device_start_key(cdev, cpa, intparm, lpm, key, flags);
	if (ret != 0)
		ccw_device_set_timeout(cdev, 0);
	return ret;
}

int
ccw_device_start(struct ccw_device *cdev, struct ccw1 *cpa,
		 unsigned long intparm, __u8 lpm, unsigned long flags)
{
	return ccw_device_start_key(cdev, cpa, intparm, lpm,
				    PAGE_DEFAULT_KEY, flags);
}

int
ccw_device_start_timeout(struct ccw_device *cdev, struct ccw1 *cpa,
			 unsigned long intparm, __u8 lpm, unsigned long flags,
			 int expires)
{
	return ccw_device_start_timeout_key(cdev, cpa, intparm, lpm,
					    PAGE_DEFAULT_KEY, flags,
					    expires);
}


int
ccw_device_halt(struct ccw_device *cdev, unsigned long intparm)
{
	struct subchannel *sch;
	int ret;

	if (!cdev)
		return -ENODEV;
	if (cdev->private->state == DEV_STATE_NOT_OPER)
		return -ENODEV;
	if (cdev->private->state != DEV_STATE_ONLINE &&
	    cdev->private->state != DEV_STATE_W4SENSE)
		return -EINVAL;
	sch = to_subchannel(cdev->dev.parent);
	if (!sch)
		return -ENODEV;
	ret = cio_halt(sch);
	if (ret == 0)
		cdev->private->intparm = intparm;
	return ret;
}

int
ccw_device_resume(struct ccw_device *cdev)
{
	struct subchannel *sch;

	if (!cdev)
		return -ENODEV;
	sch = to_subchannel(cdev->dev.parent);
	if (!sch)
		return -ENODEV;
	if (cdev->private->state == DEV_STATE_NOT_OPER)
		return -ENODEV;
	if (cdev->private->state != DEV_STATE_ONLINE ||
	    !(sch->schib.scsw.actl & SCSW_ACTL_SUSPENDED))
		return -EINVAL;
	return cio_resume(sch);
}

/*
 * Pass interrupt to device driver.
 */
int
ccw_device_call_handler(struct ccw_device *cdev)
{
	struct subchannel *sch;
	unsigned int stctl;
	int ending_status;

	sch = to_subchannel(cdev->dev.parent);

	/*
	 * we allow for the device action handler if .
	 *  - we received ending status
	 *  - the action handler requested to see all interrupts
	 *  - we received an intermediate status
	 *  - fast notification was requested (primary status)
	 *  - unsolicited interrupts
	 */
	stctl = cdev->private->irb.scsw.stctl;
	ending_status = (stctl & SCSW_STCTL_SEC_STATUS) ||
		(stctl == (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)) ||
		(stctl == SCSW_STCTL_STATUS_PEND);
	if (!ending_status &&
	    !cdev->private->options.repall &&
	    !(stctl & SCSW_STCTL_INTER_STATUS) &&
	    !(cdev->private->options.fast &&
	      (stctl & SCSW_STCTL_PRIM_STATUS)))
		return 0;

	/* Clear pending timers for device driver initiated I/O. */
	if (ending_status)
		ccw_device_set_timeout(cdev, 0);
	/*
	 * Now we are ready to call the device driver interrupt handler.
	 */
	if (cdev->handler)
		cdev->handler(cdev, cdev->private->intparm,
			      &cdev->private->irb);

	/*
	 * Clear the old and now useless interrupt response block.
	 */
	memset(&cdev->private->irb, 0, sizeof(struct irb));

	return 1;
}

/*
 * Search for CIW command in extended sense data.
 */
struct ciw *
ccw_device_get_ciw(struct ccw_device *cdev, __u32 ct)
{
	int ciw_cnt;

	if (cdev->private->flags.esid == 0)
		return NULL;
	for (ciw_cnt = 0; ciw_cnt < MAX_CIWS; ciw_cnt++)
		if (cdev->private->senseid.ciw[ciw_cnt].ct == ct)
			return cdev->private->senseid.ciw + ciw_cnt;
	return NULL;
}

__u8
ccw_device_get_path_mask(struct ccw_device *cdev)
{
	struct subchannel *sch;

	sch = to_subchannel(cdev->dev.parent);
	if (!sch)
		return 0;
	else
		return sch->lpm;
}

static void
ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb)
{
	if (!ip)
		/* unsolicited interrupt */
		return;

	/* Abuse intparm for error reporting. */
	if (IS_ERR(irb))
		cdev->private->intparm = -EIO;
	else if (irb->scsw.cc == 1)
		/* Retry for deferred condition code. */
		cdev->private->intparm = -EAGAIN;
	else if ((irb->scsw.dstat !=
		  (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
		 (irb->scsw.cstat != 0)) {
		/*
		 * We didn't get channel end / device end. Check if path
		 * verification has been started; we can retry after it has
		 * finished. We also retry unit checks except for command reject
		 * or intervention required. Also check for long busy
		 * conditions.
		 */
		 if (cdev->private->flags.doverify ||
			 cdev->private->state == DEV_STATE_VERIFY)
			 cdev->private->intparm = -EAGAIN;
		else if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
			 !(irb->ecw[0] &
			   (SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)))
			cdev->private->intparm = -EAGAIN;
		else if ((irb->scsw.dstat & DEV_STAT_ATTENTION) &&
			 (irb->scsw.dstat & DEV_STAT_DEV_END) &&
			 (irb->scsw.dstat & DEV_STAT_UNIT_EXCEP))
			cdev->private->intparm = -EAGAIN;
		 else
			 cdev->private->intparm = -EIO;
			 
	} else
		cdev->private->intparm = 0;
	wake_up(&cdev->private->wait_q);
}

static int
__ccw_device_retry_loop(struct ccw_device *cdev, struct ccw1 *ccw, long magic, __u8 lpm)
{
	int ret;
	struct subchannel *sch;

	sch = to_subchannel(cdev->dev.parent);
	do {
		ccw_device_set_timeout(cdev, 60 * HZ);
		ret = cio_start (sch, ccw, lpm);
		if (ret != 0)
			ccw_device_set_timeout(cdev, 0);
		if (ret == -EBUSY) {
			/* Try again later. */
			spin_unlock_irq(sch->lock);
			msleep(10);
			spin_lock_irq(sch->lock);
			continue;
		}
		if (ret != 0)
			/* Non-retryable error. */
			break;
		/* Wait for end of request. */
		cdev->private->intparm = magic;
		spin_unlock_irq(sch->lock);
		wait_event(cdev->private->wait_q,
			   (cdev->private->intparm == -EIO) ||
			   (cdev->private->intparm == -EAGAIN) ||
			   (cdev->private->intparm == 0));
		spin_lock_irq(sch->lock);
		/* Check at least for channel end / device end */
		if (cdev->private->intparm == -EIO) {
			/* Non-retryable error. */
			ret = -EIO;
			break;
		}
		if (cdev->private->intparm == 0)
			/* Success. */
			break;
		/* Try again later. */
		spin_unlock_irq(sch->lock);
		msleep(10);
		spin_lock_irq(sch->lock);
	} while (1);

	return ret;
}

/**
 * read_dev_chars() - read device characteristics
 * @param cdev   target ccw device
 * @param buffer pointer to buffer for rdc data
 * @param length size of rdc data
 * @returns 0 for success, negative error value on failure
 *
 * Context:
 *   called for online device, lock not held
 **/
int
read_dev_chars (struct ccw_device *cdev, void **buffer, int length)
{
	void (*handler)(struct ccw_device *, unsigned long, struct irb *);
	struct subchannel *sch;
	int ret;
	struct ccw1 *rdc_ccw;

	if (!cdev)
		return -ENODEV;
	if (!buffer || !length)
		return -EINVAL;
	sch = to_subchannel(cdev->dev.parent);

	CIO_TRACE_EVENT (4, "rddevch");
	CIO_TRACE_EVENT (4, sch->dev.bus_id);

	rdc_ccw = kzalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
	if (!rdc_ccw)
		return -ENOMEM;
	rdc_ccw->cmd_code = CCW_CMD_RDC;
	rdc_ccw->count = length;
	rdc_ccw->flags = CCW_FLAG_SLI;
	ret = set_normalized_cda (rdc_ccw, (*buffer));
	if (ret != 0) {
		kfree(rdc_ccw);
		return ret;
	}

	spin_lock_irq(sch->lock);
	/* Save interrupt handler. */
	handler = cdev->handler;
	/* Temporarily install own handler. */
	cdev->handler = ccw_device_wake_up;
	if (cdev->private->state != DEV_STATE_ONLINE)
		ret = -ENODEV;
	else if (((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) &&
		  !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) ||
		 cdev->private->flags.doverify)
		ret = -EBUSY;
	else
		/* 0x00D9C4C3 == ebcdic "RDC" */
		ret = __ccw_device_retry_loop(cdev, rdc_ccw, 0x00D9C4C3, 0);

	/* Restore interrupt handler. */
	cdev->handler = handler;
	spin_unlock_irq(sch->lock);

	clear_normalized_cda (rdc_ccw);
	kfree(rdc_ccw);

	return ret;
}

/*
 *  Read Configuration data using path mask
 */
int
read_conf_data_lpm (struct ccw_device *cdev, void **buffer, int *length, __u8 lpm)
{
	void (*handler)(struct ccw_device *, unsigned long, struct irb *);
	struct subchannel *sch;
	struct ciw *ciw;
	char *rcd_buf;
	int ret;
	struct ccw1 *rcd_ccw;

	if (!cdev)
		return -ENODEV;
	if (!buffer || !length)
		return -EINVAL;
	sch = to_subchannel(cdev->dev.parent);

	CIO_TRACE_EVENT (4, "rdconf");
	CIO_TRACE_EVENT (4, sch->dev.bus_id);

	/*
	 * scan for RCD command in extended SenseID data
	 */
	ciw = ccw_device_get_ciw(cdev, CIW_TYPE_RCD);
	if (!ciw || ciw->cmd == 0)
		return -EOPNOTSUPP;

	/* Adjust requested path mask to excluded varied off paths. */
	if (lpm) {
		lpm &= sch->opm;
		if (lpm == 0)
			return -EACCES;
	}

	rcd_ccw = kzalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
	if (!rcd_ccw)
		return -ENOMEM;
	rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
 	if (!rcd_buf) {
		kfree(rcd_ccw);
		return -ENOMEM;
	}
	rcd_ccw->cmd_code = ciw->cmd;
	rcd_ccw->cda = (__u32) __pa (rcd_buf);
	rcd_ccw->count = ciw->count;
	rcd_ccw->flags = CCW_FLAG_SLI;

	spin_lock_irq(sch->lock);
	/* Save interrupt handler. */
	handler = cdev->handler;
	/* Temporarily install own handler. */
	cdev->handler = ccw_device_wake_up;
	if (cdev->private->state != DEV_STATE_ONLINE)
		ret = -ENODEV;
	else if (((sch->schib.scsw.stctl & SCSW_STCTL_PRIM_STATUS) &&
		  !(sch->schib.scsw.stctl & SCSW_STCTL_SEC_STATUS)) ||
		 cdev->private->flags.doverify)
		ret = -EBUSY;
	else
		/* 0x00D9C3C4 == ebcdic "RCD" */
		ret = __ccw_device_retry_loop(cdev, rcd_ccw, 0x00D9C3C4, lpm);

	/* Restore interrupt handler. */
	cdev->handler = handler;
	spin_unlock_irq(sch->lock);

 	/*
 	 * on success we update the user input parms
 	 */
 	if (ret) {
 		kfree (rcd_buf);
 		*buffer = NULL;
 		*length = 0;
 	} else {
		*length = ciw->count;
		*buffer = rcd_buf;
	}
	kfree(rcd_ccw);

	return ret;
}

/*
 *  Read Configuration data
 */
int
read_conf_data (struct ccw_device *cdev, void **buffer, int *length)
{
	return read_conf_data_lpm (cdev, buffer, length, 0);
}

/*
 * Try to break the lock on a boxed device.
 */
int
ccw_device_stlck(struct ccw_device *cdev)
{
	void *buf, *buf2;
	unsigned long flags;
	struct subchannel *sch;
	int ret;

	if (!cdev)
		return -ENODEV;

	if (cdev->drv && !cdev->private->options.force)
		return -EINVAL;

	sch = to_subchannel(cdev->dev.parent);
	
	CIO_TRACE_EVENT(2, "stl lock");
	CIO_TRACE_EVENT(2, cdev->dev.bus_id);

	buf = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	buf2 = kmalloc(32*sizeof(char), GFP_DMA|GFP_KERNEL);
	if (!buf2) {
		kfree(buf);
		return -ENOMEM;
	}
	spin_lock_irqsave(sch->lock, flags);
	ret = cio_enable_subchannel(sch, 3);
	if (ret)
		goto out_unlock;
	/*
	 * Setup ccw. We chain an unconditional reserve and a release so we
	 * only break the lock.
	 */
	cdev->private->iccws[0].cmd_code = CCW_CMD_STLCK;
	cdev->private->iccws[0].cda = (__u32) __pa(buf);
	cdev->private->iccws[0].count = 32;
	cdev->private->iccws[0].flags = CCW_FLAG_CC;
	cdev->private->iccws[1].cmd_code = CCW_CMD_RELEASE;
	cdev->private->iccws[1].cda = (__u32) __pa(buf2);
	cdev->private->iccws[1].count = 32;
	cdev->private->iccws[1].flags = 0;
	ret = cio_start(sch, cdev->private->iccws, 0);
	if (ret) {
		cio_disable_subchannel(sch); //FIXME: return code?
		goto out_unlock;
	}
	cdev->private->irb.scsw.actl |= SCSW_ACTL_START_PEND;
	spin_unlock_irqrestore(sch->lock, flags);
	wait_event(cdev->private->wait_q, cdev->private->irb.scsw.actl == 0);
	spin_lock_irqsave(sch->lock, flags);
	cio_disable_subchannel(sch); //FIXME: return code?
	if ((cdev->private->irb.scsw.dstat !=
	     (DEV_STAT_CHN_END|DEV_STAT_DEV_END)) ||
	    (cdev->private->irb.scsw.cstat != 0))
		ret = -EIO;
	/* Clear irb. */
	memset(&cdev->private->irb, 0, sizeof(struct irb));
out_unlock:
	kfree(buf);
	kfree(buf2);
	spin_unlock_irqrestore(sch->lock, flags);
	return ret;
}

void *
ccw_device_get_chp_desc(struct ccw_device *cdev, int chp_no)
{
	struct subchannel *sch;
	struct chp_id chpid;

	sch = to_subchannel(cdev->dev.parent);
	chp_id_init(&chpid);
	chpid.id = sch->schib.pmcw.chpid[chp_no];
	return chp_get_chp_desc(chpid);
}

/**
 * ccw_device_get_id - obtain a ccw device id
 * @cdev: device to obtain the id for
 * @dev_id: where to fill in the values
 */
void ccw_device_get_id(struct ccw_device *cdev, struct ccw_dev_id *dev_id)
{
	*dev_id = cdev->private->dev_id;
}
EXPORT_SYMBOL(ccw_device_get_id);

// FIXME: these have to go:

int
_ccw_device_get_subchannel_number(struct ccw_device *cdev)
{
	return cdev->private->schid.sch_no;
}

int
_ccw_device_get_device_number(struct ccw_device *cdev)
{
	return cdev->private->dev_id.devno;
}


MODULE_LICENSE("GPL");
EXPORT_SYMBOL(ccw_device_set_options_mask);
EXPORT_SYMBOL(ccw_device_set_options);
EXPORT_SYMBOL(ccw_device_clear_options);
EXPORT_SYMBOL(ccw_device_clear);
EXPORT_SYMBOL(ccw_device_halt);
EXPORT_SYMBOL(ccw_device_resume);
EXPORT_SYMBOL(ccw_device_start_timeout);
EXPORT_SYMBOL(ccw_device_start);
EXPORT_SYMBOL(ccw_device_start_timeout_key);
EXPORT_SYMBOL(ccw_device_start_key);
EXPORT_SYMBOL(ccw_device_get_ciw);
EXPORT_SYMBOL(ccw_device_get_path_mask);
EXPORT_SYMBOL(read_conf_data);
EXPORT_SYMBOL(read_dev_chars);
EXPORT_SYMBOL(_ccw_device_get_subchannel_number);
EXPORT_SYMBOL(_ccw_device_get_device_number);
EXPORT_SYMBOL_GPL(ccw_device_get_chp_desc);
EXPORT_SYMBOL_GPL(read_conf_data_lpm);