1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * qdio queue initialization
4 *
5 * Copyright IBM Corp. 2008
6 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
7 */
8 #include <linux/kernel.h>
9 #include <linux/slab.h>
10 #include <linux/export.h>
11 #include <linux/io.h>
12 #include <asm/qdio.h>
13
14 #include "cio.h"
15 #include "css.h"
16 #include "device.h"
17 #include "ioasm.h"
18 #include "chsc.h"
19 #include "qdio.h"
20 #include "qdio_debug.h"
21
22 #define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))
23
24 static struct kmem_cache *qdio_q_cache;
25 static struct kmem_cache *qdio_aob_cache;
26
qdio_allocate_aob(void)27 struct qaob *qdio_allocate_aob(void)
28 {
29 return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
30 }
31 EXPORT_SYMBOL_GPL(qdio_allocate_aob);
32
qdio_release_aob(struct qaob * aob)33 void qdio_release_aob(struct qaob *aob)
34 {
35 kmem_cache_free(qdio_aob_cache, aob);
36 }
37 EXPORT_SYMBOL_GPL(qdio_release_aob);
38
39 /**
40 * qdio_free_buffers() - free qdio buffers
41 * @buf: array of pointers to qdio buffers
42 * @count: number of qdio buffers to free
43 */
qdio_free_buffers(struct qdio_buffer ** buf,unsigned int count)44 void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count)
45 {
46 int pos;
47
48 for (pos = 0; pos < count; pos += QBUFF_PER_PAGE)
49 free_page((unsigned long) buf[pos]);
50 }
51 EXPORT_SYMBOL_GPL(qdio_free_buffers);
52
53 /**
54 * qdio_alloc_buffers() - allocate qdio buffers
55 * @buf: array of pointers to qdio buffers
56 * @count: number of qdio buffers to allocate
57 */
qdio_alloc_buffers(struct qdio_buffer ** buf,unsigned int count)58 int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count)
59 {
60 int pos;
61
62 for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) {
63 buf[pos] = (void *) get_zeroed_page(GFP_KERNEL);
64 if (!buf[pos]) {
65 qdio_free_buffers(buf, count);
66 return -ENOMEM;
67 }
68 }
69 for (pos = 0; pos < count; pos++)
70 if (pos % QBUFF_PER_PAGE)
71 buf[pos] = buf[pos - 1] + 1;
72 return 0;
73 }
74 EXPORT_SYMBOL_GPL(qdio_alloc_buffers);
75
76 /**
77 * qdio_reset_buffers() - reset qdio buffers
78 * @buf: array of pointers to qdio buffers
79 * @count: number of qdio buffers that will be zeroed
80 */
qdio_reset_buffers(struct qdio_buffer ** buf,unsigned int count)81 void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count)
82 {
83 int pos;
84
85 for (pos = 0; pos < count; pos++)
86 memset(buf[pos], 0, sizeof(struct qdio_buffer));
87 }
88 EXPORT_SYMBOL_GPL(qdio_reset_buffers);
89
90 /*
91 * qebsm is only available under 64bit but the adapter sets the feature
92 * flag anyway, so we manually override it.
93 */
qebsm_possible(void)94 static inline int qebsm_possible(void)
95 {
96 return css_general_characteristics.qebsm;
97 }
98
99 /*
100 * qib_param_field: pointer to 128 bytes or NULL, if no param field
101 * nr_input_qs: pointer to nr_queues*128 words of data or NULL
102 */
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)103 static void set_impl_params(struct qdio_irq *irq_ptr,
104 unsigned int qib_param_field_format,
105 unsigned char *qib_param_field,
106 unsigned long *input_slib_elements,
107 unsigned long *output_slib_elements)
108 {
109 struct qdio_q *q;
110 int i, j;
111
112 if (!irq_ptr)
113 return;
114
115 irq_ptr->qib.pfmt = qib_param_field_format;
116 if (qib_param_field)
117 memcpy(irq_ptr->qib.parm, qib_param_field,
118 QDIO_MAX_BUFFERS_PER_Q);
119
120 if (!input_slib_elements)
121 goto output;
122
123 for_each_input_queue(irq_ptr, q, i) {
124 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
125 q->slib->slibe[j].parms =
126 input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
127 }
128 output:
129 if (!output_slib_elements)
130 return;
131
132 for_each_output_queue(irq_ptr, q, i) {
133 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
134 q->slib->slibe[j].parms =
135 output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
136 }
137 }
138
__qdio_allocate_qs(struct qdio_q ** irq_ptr_qs,int nr_queues)139 static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
140 {
141 struct qdio_q *q;
142 int i;
143
144 for (i = 0; i < nr_queues; i++) {
145 q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
146 if (!q)
147 return -ENOMEM;
148
149 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
150 if (!q->slib) {
151 kmem_cache_free(qdio_q_cache, q);
152 return -ENOMEM;
153 }
154 irq_ptr_qs[i] = q;
155 INIT_LIST_HEAD(&q->entry);
156 }
157 return 0;
158 }
159
qdio_allocate_qs(struct qdio_irq * irq_ptr,int nr_input_qs,int nr_output_qs)160 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
161 {
162 int rc;
163
164 rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
165 if (rc)
166 return rc;
167 rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
168 return rc;
169 }
170
setup_queues_misc(struct qdio_q * q,struct qdio_irq * irq_ptr,qdio_handler_t * handler,int i)171 static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
172 qdio_handler_t *handler, int i)
173 {
174 struct slib *slib = q->slib;
175
176 /* queue must be cleared for qdio_establish */
177 memset(q, 0, sizeof(*q));
178 memset(slib, 0, PAGE_SIZE);
179 q->slib = slib;
180 q->irq_ptr = irq_ptr;
181 q->mask = 1 << (31 - i);
182 q->nr = i;
183 q->handler = handler;
184 INIT_LIST_HEAD(&q->entry);
185 }
186
setup_storage_lists(struct qdio_q * q,struct qdio_irq * irq_ptr,void ** sbals_array,int i)187 static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
188 void **sbals_array, int i)
189 {
190 struct qdio_q *prev;
191 int j;
192
193 DBF_HEX(&q, sizeof(void *));
194 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);
195
196 /* fill in sbal */
197 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
198 q->sbal[j] = *sbals_array++;
199
200 /* fill in slib */
201 if (i > 0) {
202 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
203 : irq_ptr->output_qs[i - 1];
204 prev->slib->nsliba = (unsigned long)q->slib;
205 }
206
207 q->slib->sla = (unsigned long)q->sl;
208 q->slib->slsba = (unsigned long)&q->slsb.val[0];
209
210 /* fill in sl */
211 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
212 q->sl->element[j].sbal = virt_to_phys(q->sbal[j]);
213 }
214
setup_queues(struct qdio_irq * irq_ptr,struct qdio_initialize * qdio_init)215 static void setup_queues(struct qdio_irq *irq_ptr,
216 struct qdio_initialize *qdio_init)
217 {
218 struct qdio_q *q;
219 void **input_sbal_array = qdio_init->input_sbal_addr_array;
220 void **output_sbal_array = qdio_init->output_sbal_addr_array;
221 struct qdio_outbuf_state *output_sbal_state_array =
222 qdio_init->output_sbal_state_array;
223 int i;
224
225 for_each_input_queue(irq_ptr, q, i) {
226 DBF_EVENT("inq:%1d", i);
227 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
228
229 q->is_input_q = 1;
230 q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ?
231 qdio_init->queue_start_poll_array[i] : NULL;
232
233 setup_storage_lists(q, irq_ptr, input_sbal_array, i);
234 input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
235
236 if (is_thinint_irq(irq_ptr)) {
237 tasklet_init(&q->tasklet, tiqdio_inbound_processing,
238 (unsigned long) q);
239 } else {
240 tasklet_init(&q->tasklet, qdio_inbound_processing,
241 (unsigned long) q);
242 }
243 }
244
245 for_each_output_queue(irq_ptr, q, i) {
246 DBF_EVENT("outq:%1d", i);
247 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
248
249 q->u.out.sbal_state = output_sbal_state_array;
250 output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q;
251
252 q->is_input_q = 0;
253 q->u.out.scan_threshold = qdio_init->scan_threshold;
254 setup_storage_lists(q, irq_ptr, output_sbal_array, i);
255 output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
256
257 tasklet_init(&q->tasklet, qdio_outbound_processing,
258 (unsigned long) q);
259 timer_setup(&q->u.out.timer, qdio_outbound_timer, 0);
260 }
261 }
262
process_ac_flags(struct qdio_irq * irq_ptr,unsigned char qdioac)263 static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
264 {
265 if (qdioac & AC1_SIGA_INPUT_NEEDED)
266 irq_ptr->siga_flag.input = 1;
267 if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
268 irq_ptr->siga_flag.output = 1;
269 if (qdioac & AC1_SIGA_SYNC_NEEDED)
270 irq_ptr->siga_flag.sync = 1;
271 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
272 irq_ptr->siga_flag.sync_after_ai = 1;
273 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
274 irq_ptr->siga_flag.sync_out_after_pci = 1;
275 }
276
check_and_setup_qebsm(struct qdio_irq * irq_ptr,unsigned char qdioac,unsigned long token)277 static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
278 unsigned char qdioac, unsigned long token)
279 {
280 if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
281 goto no_qebsm;
282 if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
283 (!(qdioac & AC1_SC_QEBSM_ENABLED)))
284 goto no_qebsm;
285
286 irq_ptr->sch_token = token;
287
288 DBF_EVENT("V=V:1");
289 DBF_EVENT("%8lx", irq_ptr->sch_token);
290 return;
291
292 no_qebsm:
293 irq_ptr->sch_token = 0;
294 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
295 DBF_EVENT("noV=V");
296 }
297
298 /*
299 * If there is a qdio_irq we use the chsc_page and store the information
300 * in the qdio_irq, otherwise we copy it to the specified structure.
301 */
qdio_setup_get_ssqd(struct qdio_irq * irq_ptr,struct subchannel_id * schid,struct qdio_ssqd_desc * data)302 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
303 struct subchannel_id *schid,
304 struct qdio_ssqd_desc *data)
305 {
306 struct chsc_ssqd_area *ssqd;
307 int rc;
308
309 DBF_EVENT("getssqd:%4x", schid->sch_no);
310 if (!irq_ptr) {
311 ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
312 if (!ssqd)
313 return -ENOMEM;
314 } else {
315 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
316 }
317
318 rc = chsc_ssqd(*schid, ssqd);
319 if (rc)
320 goto out;
321
322 if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
323 !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
324 (ssqd->qdio_ssqd.sch != schid->sch_no))
325 rc = -EINVAL;
326
327 if (!rc)
328 memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));
329
330 out:
331 if (!irq_ptr)
332 free_page((unsigned long)ssqd);
333
334 return rc;
335 }
336
qdio_setup_ssqd_info(struct qdio_irq * irq_ptr)337 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
338 {
339 unsigned char qdioac;
340 int rc;
341
342 rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
343 if (rc) {
344 DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
345 DBF_ERROR("rc:%x", rc);
346 /* all flags set, worst case */
347 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
348 AC1_SIGA_SYNC_NEEDED;
349 } else
350 qdioac = irq_ptr->ssqd_desc.qdioac1;
351
352 check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
353 process_ac_flags(irq_ptr, qdioac);
354 DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
355 DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
356 }
357
qdio_release_memory(struct qdio_irq * irq_ptr)358 void qdio_release_memory(struct qdio_irq *irq_ptr)
359 {
360 struct qdio_q *q;
361 int i;
362
363 /*
364 * Must check queue array manually since irq_ptr->nr_input_queues /
365 * irq_ptr->nr_input_queues may not yet be set.
366 */
367 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
368 q = irq_ptr->input_qs[i];
369 if (q) {
370 free_page((unsigned long) q->slib);
371 kmem_cache_free(qdio_q_cache, q);
372 }
373 }
374 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
375 q = irq_ptr->output_qs[i];
376 if (q) {
377 if (q->u.out.use_cq) {
378 int n;
379
380 for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) {
381 struct qaob *aob = q->u.out.aobs[n];
382 if (aob) {
383 qdio_release_aob(aob);
384 q->u.out.aobs[n] = NULL;
385 }
386 }
387
388 qdio_disable_async_operation(&q->u.out);
389 }
390 free_page((unsigned long) q->slib);
391 kmem_cache_free(qdio_q_cache, q);
392 }
393 }
394 free_page((unsigned long) irq_ptr->qdr);
395 free_page(irq_ptr->chsc_page);
396 free_page((unsigned long) irq_ptr);
397 }
398
__qdio_allocate_fill_qdr(struct qdio_irq * irq_ptr,struct qdio_q ** irq_ptr_qs,int i,int nr)399 static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
400 struct qdio_q **irq_ptr_qs,
401 int i, int nr)
402 {
403 irq_ptr->qdr->qdf0[i + nr].sliba =
404 (unsigned long)irq_ptr_qs[i]->slib;
405
406 irq_ptr->qdr->qdf0[i + nr].sla =
407 (unsigned long)irq_ptr_qs[i]->sl;
408
409 irq_ptr->qdr->qdf0[i + nr].slsba =
410 (unsigned long)&irq_ptr_qs[i]->slsb.val[0];
411
412 irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4;
413 irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4;
414 irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4;
415 irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4;
416 }
417
setup_qdr(struct qdio_irq * irq_ptr,struct qdio_initialize * qdio_init)418 static void setup_qdr(struct qdio_irq *irq_ptr,
419 struct qdio_initialize *qdio_init)
420 {
421 int i;
422
423 irq_ptr->qdr->qfmt = qdio_init->q_format;
424 irq_ptr->qdr->ac = qdio_init->qdr_ac;
425 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
426 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
427 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
428 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
429 irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
430 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
431
432 for (i = 0; i < qdio_init->no_input_qs; i++)
433 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);
434
435 for (i = 0; i < qdio_init->no_output_qs; i++)
436 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
437 qdio_init->no_input_qs);
438 }
439
setup_qib(struct qdio_irq * irq_ptr,struct qdio_initialize * init_data)440 static void setup_qib(struct qdio_irq *irq_ptr,
441 struct qdio_initialize *init_data)
442 {
443 if (qebsm_possible())
444 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
445
446 irq_ptr->qib.rflags |= init_data->qib_rflags;
447
448 irq_ptr->qib.qfmt = init_data->q_format;
449 if (init_data->no_input_qs)
450 irq_ptr->qib.isliba =
451 (unsigned long)(irq_ptr->input_qs[0]->slib);
452 if (init_data->no_output_qs)
453 irq_ptr->qib.osliba =
454 (unsigned long)(irq_ptr->output_qs[0]->slib);
455 memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
456 }
457
qdio_setup_irq(struct qdio_initialize * init_data)458 int qdio_setup_irq(struct qdio_initialize *init_data)
459 {
460 struct ciw *ciw;
461 struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
462
463 memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
464 memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
465 memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
466 memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
467 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
468
469 irq_ptr->debugfs_dev = irq_ptr->debugfs_perf = NULL;
470 irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0;
471
472 /* wipes qib.ac, required by ar7063 */
473 memset(irq_ptr->qdr, 0, sizeof(struct qdr));
474
475 irq_ptr->int_parm = init_data->int_parm;
476 irq_ptr->nr_input_qs = init_data->no_input_qs;
477 irq_ptr->nr_output_qs = init_data->no_output_qs;
478 irq_ptr->cdev = init_data->cdev;
479 ccw_device_get_schid(irq_ptr->cdev, &irq_ptr->schid);
480 setup_queues(irq_ptr, init_data);
481
482 setup_qib(irq_ptr, init_data);
483 set_impl_params(irq_ptr, init_data->qib_param_field_format,
484 init_data->qib_param_field,
485 init_data->input_slib_elements,
486 init_data->output_slib_elements);
487
488 /* fill input and output descriptors */
489 setup_qdr(irq_ptr, init_data);
490
491 /* qdr, qib, sls, slsbs, slibs, sbales are filled now */
492
493 /* get qdio commands */
494 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
495 if (!ciw) {
496 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
497 return -EINVAL;
498 }
499 irq_ptr->equeue = *ciw;
500
501 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
502 if (!ciw) {
503 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
504 return -EINVAL;
505 }
506 irq_ptr->aqueue = *ciw;
507
508 /* set new interrupt handler */
509 spin_lock_irq(get_ccwdev_lock(irq_ptr->cdev));
510 irq_ptr->orig_handler = init_data->cdev->handler;
511 init_data->cdev->handler = qdio_int_handler;
512 spin_unlock_irq(get_ccwdev_lock(irq_ptr->cdev));
513 return 0;
514 }
515
qdio_print_subchannel_info(struct qdio_irq * irq_ptr,struct ccw_device * cdev)516 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
517 struct ccw_device *cdev)
518 {
519 char s[80];
520
521 snprintf(s, 80, "qdio: %s %s on SC %x using "
522 "AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s%s%s\n",
523 dev_name(&cdev->dev),
524 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
525 ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
526 irq_ptr->schid.sch_no,
527 is_thinint_irq(irq_ptr),
528 (irq_ptr->sch_token) ? 1 : 0,
529 (irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 1 : 0,
530 css_general_characteristics.aif_tdd,
531 (irq_ptr->siga_flag.input) ? "R" : " ",
532 (irq_ptr->siga_flag.output) ? "W" : " ",
533 (irq_ptr->siga_flag.sync) ? "S" : " ",
534 (irq_ptr->siga_flag.sync_after_ai) ? "A" : " ",
535 (irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " ");
536 printk(KERN_INFO "%s", s);
537 }
538
qdio_enable_async_operation(struct qdio_output_q * outq)539 int qdio_enable_async_operation(struct qdio_output_q *outq)
540 {
541 outq->aobs = kcalloc(QDIO_MAX_BUFFERS_PER_Q, sizeof(struct qaob *),
542 GFP_ATOMIC);
543 if (!outq->aobs) {
544 outq->use_cq = 0;
545 return -ENOMEM;
546 }
547 outq->use_cq = 1;
548 return 0;
549 }
550
qdio_disable_async_operation(struct qdio_output_q * q)551 void qdio_disable_async_operation(struct qdio_output_q *q)
552 {
553 kfree(q->aobs);
554 q->aobs = NULL;
555 q->use_cq = 0;
556 }
557
qdio_setup_init(void)558 int __init qdio_setup_init(void)
559 {
560 int rc;
561
562 qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
563 256, 0, NULL);
564 if (!qdio_q_cache)
565 return -ENOMEM;
566
567 qdio_aob_cache = kmem_cache_create("qdio_aob",
568 sizeof(struct qaob),
569 sizeof(struct qaob),
570 0,
571 NULL);
572 if (!qdio_aob_cache) {
573 rc = -ENOMEM;
574 goto free_qdio_q_cache;
575 }
576
577 /* Check for OSA/FCP thin interrupts (bit 67). */
578 DBF_EVENT("thinint:%1d",
579 (css_general_characteristics.aif_osa) ? 1 : 0);
580
581 /* Check for QEBSM support in general (bit 58). */
582 DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
583 rc = 0;
584 out:
585 return rc;
586 free_qdio_q_cache:
587 kmem_cache_destroy(qdio_q_cache);
588 goto out;
589 }
590
qdio_setup_exit(void)591 void qdio_setup_exit(void)
592 {
593 kmem_cache_destroy(qdio_aob_cache);
594 kmem_cache_destroy(qdio_q_cache);
595 }
596