summaryrefslogtreecommitdiffstats
path: root/drivers/s390/cio/qdio_setup.c
blob: 48b3866a9ded31401d986ea79a6d3f1629c08f74 (plain)
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
/*
 * qdio queue initialization
 *
 * Copyright IBM Corp. 2008
 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
 */
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <asm/qdio.h>

#include "cio.h"
#include "css.h"
#include "device.h"
#include "ioasm.h"
#include "chsc.h"
#include "qdio.h"
#include "qdio_debug.h"

#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))

static struct kmem_cache *qdio_q_cache;
static struct kmem_cache *qdio_aob_cache;

struct qaob *qdio_allocate_aob(void)
{
	return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
}
EXPORT_SYMBOL_GPL(qdio_allocate_aob);

void qdio_release_aob(struct qaob *aob)
{
	kmem_cache_free(qdio_aob_cache, aob);
}
EXPORT_SYMBOL_GPL(qdio_release_aob);

/**
 * qdio_free_buffers() - free qdio buffers
 * @buf: array of pointers to qdio buffers
 * @count: number of qdio buffers to free
 */
void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count)
{
	int pos;

	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE)
		free_page((unsigned long) buf[pos]);
}
EXPORT_SYMBOL_GPL(qdio_free_buffers);

/**
 * qdio_alloc_buffers() - allocate qdio buffers
 * @buf: array of pointers to qdio buffers
 * @count: number of qdio buffers to allocate
 */
int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count)
{
	int pos;

	for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) {
		buf[pos] = (void *) get_zeroed_page(GFP_KERNEL);
		if (!buf[pos]) {
			qdio_free_buffers(buf, count);
			return -ENOMEM;
		}
	}
	for (pos = 0; pos < count; pos++)
		if (pos % QBUFF_PER_PAGE)
			buf[pos] = buf[pos - 1] + 1;
	return 0;
}
EXPORT_SYMBOL_GPL(qdio_alloc_buffers);

/**
 * qdio_reset_buffers() - reset qdio buffers
 * @buf: array of pointers to qdio buffers
 * @count: number of qdio buffers that will be zeroed
 */
void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count)
{
	int pos;

	for (pos = 0; pos < count; pos++)
		memset(buf[pos], 0, sizeof(struct qdio_buffer));
}
EXPORT_SYMBOL_GPL(qdio_reset_buffers);

/*
 * qebsm is only available under 64bit but the adapter sets the feature
 * flag anyway, so we manually override it.
 */
static inline int qebsm_possible(void)
{
	return css_general_characteristics.qebsm;
}

/*
 * qib_param_field: pointer to 128 bytes or NULL, if no param field
 * nr_input_qs: pointer to nr_queues*128 words of data or NULL
 */
static void set_impl_params(struct qdio_irq *irq_ptr,
			    unsigned int qib_param_field_format,
			    unsigned char *qib_param_field,
			    unsigned long *input_slib_elements,
			    unsigned long *output_slib_elements)
{
	struct qdio_q *q;
	int i, j;

	if (!irq_ptr)
		return;

	irq_ptr->qib.pfmt = qib_param_field_format;
	if (qib_param_field)
		memcpy(irq_ptr->qib.parm, qib_param_field,
		       QDIO_MAX_BUFFERS_PER_Q);

	if (!input_slib_elements)
		goto output;

	for_each_input_queue(irq_ptr, q, i) {
		for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
			q->slib->slibe[j].parms =
				input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
	}
output:
	if (!output_slib_elements)
		return;

	for_each_output_queue(irq_ptr, q, i) {
		for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
			q->slib->slibe[j].parms =
				output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
	}
}

static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
{
	struct qdio_q *q;
	int i;

	for (i = 0; i < nr_queues; i++) {
		q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
		if (!q)
			return -ENOMEM;

		q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
		if (!q->slib) {
			kmem_cache_free(qdio_q_cache, q);
			return -ENOMEM;
		}
		irq_ptr_qs[i] = q;
	}
	return 0;
}

int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
{
	int rc;

	rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
	if (rc)
		return rc;
	rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
	return rc;
}

static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
			      qdio_handler_t *handler, int i)
{
	struct slib *slib = q->slib;

	/* queue must be cleared for qdio_establish */
	memset(q, 0, sizeof(*q));
	memset(slib, 0, PAGE_SIZE);
	q->slib = slib;
	q->irq_ptr = irq_ptr;
	q->mask = 1 << (31 - i);
	q->nr = i;
	q->handler = handler;
}

static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
				void **sbals_array, int i)
{
	struct qdio_q *prev;
	int j;

	DBF_HEX(&q, sizeof(void *));
	q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);

	/* fill in sbal */
	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
		q->sbal[j] = *sbals_array++;

	/* fill in slib */
	if (i > 0) {
		prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
			: irq_ptr->output_qs[i - 1];
		prev->slib->nsliba = (unsigned long)q->slib;
	}

	q->slib->sla = (unsigned long)q->sl;
	q->slib->slsba = (unsigned long)&q->slsb.val[0];

	/* fill in sl */
	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
		q->sl->element[j].sbal = (unsigned long)q->sbal[j];
}

static void setup_queues(struct qdio_irq *irq_ptr,
			 struct qdio_initialize *qdio_init)
{
	struct qdio_q *q;
	void **input_sbal_array = qdio_init->input_sbal_addr_array;
	void **output_sbal_array = qdio_init->output_sbal_addr_array;
	struct qdio_outbuf_state *output_sbal_state_array =
				  qdio_init->output_sbal_state_array;
	int i;

	for_each_input_queue(irq_ptr, q, i) {
		DBF_EVENT("inq:%1d", i);
		setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);

		q->is_input_q = 1;
		q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ?
				qdio_init->queue_start_poll_array[i] : NULL;

		setup_storage_lists(q, irq_ptr, input_sbal_array, i);
		input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;

		if (is_thinint_irq(irq_ptr)) {
			tasklet_init(&q->tasklet, tiqdio_inbound_processing,
				     (unsigned long) q);
		} else {
			tasklet_init(&q->tasklet, qdio_inbound_processing,
				     (unsigned long) q);
		}
	}

	for_each_output_queue(irq_ptr, q, i) {
		DBF_EVENT("outq:%1d", i);
		setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);

		q->u.out.sbal_state = output_sbal_state_array;
		output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q;

		q->is_input_q = 0;
		q->u.out.scan_threshold = qdio_init->scan_threshold;
		setup_storage_lists(q, irq_ptr, output_sbal_array, i);
		output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;

		tasklet_init(&q->tasklet, qdio_outbound_processing,
			     (unsigned long) q);
		setup_timer(&q->u.out.timer, (void(*)(unsigned long))
			    &qdio_outbound_timer, (unsigned long)q);
	}
}

static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
{
	if (qdioac & AC1_SIGA_INPUT_NEEDED)
		irq_ptr->siga_flag.input = 1;
	if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
		irq_ptr->siga_flag.output = 1;
	if (qdioac & AC1_SIGA_SYNC_NEEDED)
		irq_ptr->siga_flag.sync = 1;
	if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
		irq_ptr->siga_flag.sync_after_ai = 1;
	if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
		irq_ptr->siga_flag.sync_out_after_pci = 1;
}

static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
				  unsigned char qdioac, unsigned long token)
{
	if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
		goto no_qebsm;
	if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
	    (!(qdioac & AC1_SC_QEBSM_ENABLED)))
		goto no_qebsm;

	irq_ptr->sch_token = token;

	DBF_EVENT("V=V:1");
	DBF_EVENT("%8lx", irq_ptr->sch_token);
	return;

no_qebsm:
	irq_ptr->sch_token = 0;
	irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
	DBF_EVENT("noV=V");
}

/*
 * If there is a qdio_irq we use the chsc_page and store the information
 * in the qdio_irq, otherwise we copy it to the specified structure.
 */
int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
			struct subchannel_id *schid,
			struct qdio_ssqd_desc *data)
{
	struct chsc_ssqd_area *ssqd;
	int rc;

	DBF_EVENT("getssqd:%4x", schid->sch_no);
	if (!irq_ptr) {
		ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
		if (!ssqd)
			return -ENOMEM;
	} else {
		ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
	}

	rc = chsc_ssqd(*schid, ssqd);
	if (rc)
		goto out;

	if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
	    !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
	    (ssqd->qdio_ssqd.sch != schid->sch_no))
		rc = -EINVAL;

	if (!rc)
		memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));

out:
	if (!irq_ptr)
		free_page((unsigned long)ssqd);

	return rc;
}

void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
{
	unsigned char qdioac;
	int rc;

	rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
	if (rc) {
		DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
		DBF_ERROR("rc:%x", rc);
		/* all flags set, worst case */
		qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
			 AC1_SIGA_SYNC_NEEDED;
	} else
		qdioac = irq_ptr->ssqd_desc.qdioac1;

	check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
	process_ac_flags(irq_ptr, qdioac);
	DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
	DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
}

void qdio_release_memory(struct qdio_irq *irq_ptr)
{
	struct qdio_q *q;
	int i;

	/*
	 * Must check queue array manually since irq_ptr->nr_input_queues /
	 * irq_ptr->nr_input_queues may not yet be set.
	 */
	for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
		q = irq_ptr->input_qs[i];
		if (q) {
			free_page((unsigned long) q->slib);
			kmem_cache_free(qdio_q_cache, q);
		}
	}
	for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
		q = irq_ptr->output_qs[i];
		if (q) {
			if (q->u.out.use_cq) {
				int n;

				for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) {
					struct qaob *aob = q->u.out.aobs[n];
					if (aob) {
						qdio_release_aob(aob);
						q->u.out.aobs[n] = NULL;
					}
				}

				qdio_disable_async_operation(&q->u.out);
			}
			free_page((unsigned long) q->slib);
			kmem_cache_free(qdio_q_cache, q);
		}
	}
	free_page((unsigned long) irq_ptr->qdr);
	free_page(irq_ptr->chsc_page);
	free_page((unsigned long) irq_ptr);
}

static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
				     struct qdio_q **irq_ptr_qs,
				     int i, int nr)
{
	irq_ptr->qdr->qdf0[i + nr].sliba =
		(unsigned long)irq_ptr_qs[i]->slib;

	irq_ptr->qdr->qdf0[i + nr].sla =
		(unsigned long)irq_ptr_qs[i]->sl;

	irq_ptr->qdr->qdf0[i + nr].slsba =
		(unsigned long)&irq_ptr_qs[i]->slsb.val[0];

	irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4;
	irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4;
	irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4;
	irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4;
}

static void setup_qdr(struct qdio_irq *irq_ptr,
		      struct qdio_initialize *qdio_init)
{
	int i;

	irq_ptr->qdr->qfmt = qdio_init->q_format;
	irq_ptr->qdr->ac = qdio_init->qdr_ac;
	irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
	irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
	irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
	irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
	irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
	irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;

	for (i = 0; i < qdio_init->no_input_qs; i++)
		__qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);

	for (i = 0; i < qdio_init->no_output_qs; i++)
		__qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
					 qdio_init->no_input_qs);
}

static void setup_qib(struct qdio_irq *irq_ptr,
		      struct qdio_initialize *init_data)
{
	if (qebsm_possible())
		irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;

	irq_ptr->qib.rflags |= init_data->qib_rflags;

	irq_ptr->qib.qfmt = init_data->q_format;
	if (init_data->no_input_qs)
		irq_ptr->qib.isliba =
			(unsigned long)(irq_ptr->input_qs[0]->slib);
	if (init_data->no_output_qs)
		irq_ptr->qib.osliba =
			(unsigned long)(irq_ptr->output_qs[0]->slib);
	memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
}

int qdio_setup_irq(struct qdio_initialize *init_data)
{
	struct ciw *ciw;
	struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
	int rc;

	memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
	memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
	memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
	memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
	memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));

	irq_ptr->debugfs_dev = irq_ptr->debugfs_perf = NULL;
	irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0;

	/* wipes qib.ac, required by ar7063 */
	memset(irq_ptr->qdr, 0, sizeof(struct qdr));

	irq_ptr->int_parm = init_data->int_parm;
	irq_ptr->nr_input_qs = init_data->no_input_qs;
	irq_ptr->nr_output_qs = init_data->no_output_qs;
	irq_ptr->cdev = init_data->cdev;
	ccw_device_get_schid(irq_ptr->cdev, &irq_ptr->schid);
	setup_queues(irq_ptr, init_data);

	setup_qib(irq_ptr, init_data);
	qdio_setup_thinint(irq_ptr);
	set_impl_params(irq_ptr, init_data->qib_param_field_format,
			init_data->qib_param_field,
			init_data->input_slib_elements,
			init_data->output_slib_elements);

	/* fill input and output descriptors */
	setup_qdr(irq_ptr, init_data);

	/* qdr, qib, sls, slsbs, slibs, sbales are filled now */

	/* get qdio commands */
	ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
	if (!ciw) {
		DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
		rc = -EINVAL;
		goto out_err;
	}
	irq_ptr->equeue = *ciw;

	ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
	if (!ciw) {
		DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
		rc = -EINVAL;
		goto out_err;
	}
	irq_ptr->aqueue = *ciw;

	/* set new interrupt handler */
	irq_ptr->orig_handler = init_data->cdev->handler;
	init_data->cdev->handler = qdio_int_handler;
	return 0;
out_err:
	qdio_release_memory(irq_ptr);
	return rc;
}

void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
				struct ccw_device *cdev)
{
	char s[80];

	snprintf(s, 80, "qdio: %s %s on SC %x using "
		 "AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s%s%s\n",
		 dev_name(&cdev->dev),
		 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
			((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
		 irq_ptr->schid.sch_no,
		 is_thinint_irq(irq_ptr),
		 (irq_ptr->sch_token) ? 1 : 0,
		 (irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 1 : 0,
		 css_general_characteristics.aif_tdd,
		 (irq_ptr->siga_flag.input) ? "R" : " ",
		 (irq_ptr->siga_flag.output) ? "W" : " ",
		 (irq_ptr->siga_flag.sync) ? "S" : " ",
		 (irq_ptr->siga_flag.sync_after_ai) ? "A" : " ",
		 (irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " ");
	printk(KERN_INFO "%s", s);
}

int qdio_enable_async_operation(struct qdio_output_q *outq)
{
	outq->aobs = kzalloc(sizeof(struct qaob *) * QDIO_MAX_BUFFERS_PER_Q,
			     GFP_ATOMIC);
	if (!outq->aobs) {
		outq->use_cq = 0;
		return -ENOMEM;
	}
	outq->use_cq = 1;
	return 0;
}

void qdio_disable_async_operation(struct qdio_output_q *q)
{
	kfree(q->aobs);
	q->aobs = NULL;
	q->use_cq = 0;
}

int __init qdio_setup_init(void)
{
	int rc;

	qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
					 256, 0, NULL);
	if (!qdio_q_cache)
		return -ENOMEM;

	qdio_aob_cache = kmem_cache_create("qdio_aob",
					sizeof(struct qaob),
					sizeof(struct qaob),
					0,
					NULL);
	if (!qdio_aob_cache) {
		rc = -ENOMEM;
		goto free_qdio_q_cache;
	}

	/* Check for OSA/FCP thin interrupts (bit 67). */
	DBF_EVENT("thinint:%1d",
		  (css_general_characteristics.aif_osa) ? 1 : 0);

	/* Check for QEBSM support in general (bit 58). */
	DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
	rc = 0;
out:
	return rc;
free_qdio_q_cache:
	kmem_cache_destroy(qdio_q_cache);
	goto out;
}

void qdio_setup_exit(void)
{
	kmem_cache_destroy(qdio_aob_cache);
	kmem_cache_destroy(qdio_q_cache);
}
OpenPOWER on IntegriCloud