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