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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
23static struct kmem_cache *qdio_q_cache;
24static struct kmem_cache *qdio_aob_cache;
25
26struct qaob *qdio_allocate_aob(void)
27{
28 return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
29}
30
31void qdio_release_aob(struct qaob *aob)
32{
33 kmem_cache_free(qdio_aob_cache, aob);
34}
35EXPORT_SYMBOL_GPL(qdio_release_aob);
36
37
38
39
40
41
42void 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}
49EXPORT_SYMBOL_GPL(qdio_free_buffers);
50
51
52
53
54
55
56int 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}
72EXPORT_SYMBOL_GPL(qdio_alloc_buffers);
73
74
75
76
77
78
79void 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}
86EXPORT_SYMBOL_GPL(qdio_reset_buffers);
87
88
89
90
91
92static inline int qebsm_possible(void)
93{
94 return css_general_characteristics.qebsm;
95}
96
97
98
99
100
101static 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 QDIO_MAX_BUFFERS_PER_Q);
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 }
126output:
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
137static 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 }
154 return 0;
155}
156
157int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
158{
159 int rc;
160
161 rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
162 if (rc)
163 return rc;
164 rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
165 return rc;
166}
167
168static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
169 qdio_handler_t *handler, int i)
170{
171 struct slib *slib = q->slib;
172
173
174 memset(q, 0, sizeof(*q));
175 memset(slib, 0, PAGE_SIZE);
176 q->slib = slib;
177 q->irq_ptr = irq_ptr;
178 q->mask = 1 << (31 - i);
179 q->nr = i;
180 q->handler = handler;
181}
182
183static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
184 struct qdio_buffer **sbals_array, int i)
185{
186 struct qdio_q *prev;
187 int j;
188
189 DBF_HEX(&q, sizeof(void *));
190 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);
191
192
193 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
194 q->sbal[j] = *sbals_array++;
195
196
197 if (i > 0) {
198 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
199 : irq_ptr->output_qs[i - 1];
200 prev->slib->nsliba = (unsigned long)q->slib;
201 }
202
203 q->slib->sla = (unsigned long)q->sl;
204 q->slib->slsba = (unsigned long)&q->slsb.val[0];
205
206
207 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
208 q->sl->element[j].sbal = (unsigned long)q->sbal[j];
209}
210
211static void setup_queues(struct qdio_irq *irq_ptr,
212 struct qdio_initialize *qdio_init)
213{
214 struct qdio_q *q;
215 struct qdio_buffer **input_sbal_array = qdio_init->input_sbal_addr_array;
216 struct qdio_buffer **output_sbal_array = qdio_init->output_sbal_addr_array;
217 struct qdio_outbuf_state *output_sbal_state_array =
218 qdio_init->output_sbal_state_array;
219 int i;
220
221 for_each_input_queue(irq_ptr, q, i) {
222 DBF_EVENT("inq:%1d", i);
223 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
224
225 q->is_input_q = 1;
226 q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ?
227 qdio_init->queue_start_poll_array[i] : NULL;
228
229 setup_storage_lists(q, irq_ptr, input_sbal_array, i);
230 input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
231
232 if (is_thinint_irq(irq_ptr)) {
233 tasklet_init(&q->tasklet, tiqdio_inbound_processing,
234 (unsigned long) q);
235 } else {
236 tasklet_init(&q->tasklet, qdio_inbound_processing,
237 (unsigned long) q);
238 }
239 }
240
241 for_each_output_queue(irq_ptr, q, i) {
242 DBF_EVENT("outq:%1d", i);
243 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
244
245 q->u.out.sbal_state = output_sbal_state_array;
246 output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q;
247
248 q->is_input_q = 0;
249 q->u.out.scan_threshold = qdio_init->scan_threshold;
250 setup_storage_lists(q, irq_ptr, output_sbal_array, i);
251 output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
252
253 tasklet_init(&q->tasklet, qdio_outbound_processing,
254 (unsigned long) q);
255 timer_setup(&q->u.out.timer, qdio_outbound_timer, 0);
256 }
257}
258
259static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
260{
261 if (qdioac & AC1_SIGA_INPUT_NEEDED)
262 irq_ptr->siga_flag.input = 1;
263 if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
264 irq_ptr->siga_flag.output = 1;
265 if (qdioac & AC1_SIGA_SYNC_NEEDED)
266 irq_ptr->siga_flag.sync = 1;
267 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
268 irq_ptr->siga_flag.sync_after_ai = 1;
269 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
270 irq_ptr->siga_flag.sync_out_after_pci = 1;
271}
272
273static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
274 unsigned char qdioac, unsigned long token)
275{
276 if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
277 goto no_qebsm;
278 if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
279 (!(qdioac & AC1_SC_QEBSM_ENABLED)))
280 goto no_qebsm;
281
282 irq_ptr->sch_token = token;
283
284 DBF_EVENT("V=V:1");
285 DBF_EVENT("%8lx", irq_ptr->sch_token);
286 return;
287
288no_qebsm:
289 irq_ptr->sch_token = 0;
290 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
291 DBF_EVENT("noV=V");
292}
293
294
295
296
297
298int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
299 struct subchannel_id *schid,
300 struct qdio_ssqd_desc *data)
301{
302 struct chsc_ssqd_area *ssqd;
303 int rc;
304
305 DBF_EVENT("getssqd:%4x", schid->sch_no);
306 if (!irq_ptr) {
307 ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
308 if (!ssqd)
309 return -ENOMEM;
310 } else {
311 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
312 }
313
314 rc = chsc_ssqd(*schid, ssqd);
315 if (rc)
316 goto out;
317
318 if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
319 !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
320 (ssqd->qdio_ssqd.sch != schid->sch_no))
321 rc = -EINVAL;
322
323 if (!rc)
324 memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));
325
326out:
327 if (!irq_ptr)
328 free_page((unsigned long)ssqd);
329
330 return rc;
331}
332
333void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
334{
335 unsigned char qdioac;
336 int rc;
337
338 rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
339 if (rc) {
340 DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
341 DBF_ERROR("rc:%x", rc);
342
343 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
344 AC1_SIGA_SYNC_NEEDED;
345 } else
346 qdioac = irq_ptr->ssqd_desc.qdioac1;
347
348 check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
349 process_ac_flags(irq_ptr, qdioac);
350 DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
351 DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
352}
353
354void qdio_release_memory(struct qdio_irq *irq_ptr)
355{
356 struct qdio_q *q;
357 int i;
358
359
360
361
362
363 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
364 q = irq_ptr->input_qs[i];
365 if (q) {
366 free_page((unsigned long) q->slib);
367 kmem_cache_free(qdio_q_cache, q);
368 }
369 }
370 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
371 q = irq_ptr->output_qs[i];
372 if (q) {
373 if (q->u.out.use_cq) {
374 int n;
375
376 for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) {
377 struct qaob *aob = q->u.out.aobs[n];
378 if (aob) {
379 qdio_release_aob(aob);
380 q->u.out.aobs[n] = NULL;
381 }
382 }
383
384 qdio_disable_async_operation(&q->u.out);
385 }
386 free_page((unsigned long) q->slib);
387 kmem_cache_free(qdio_q_cache, q);
388 }
389 }
390 free_page((unsigned long) irq_ptr->qdr);
391 free_page(irq_ptr->chsc_page);
392 free_page((unsigned long) irq_ptr);
393}
394
395static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
396 struct qdio_q **irq_ptr_qs,
397 int i, int nr)
398{
399 irq_ptr->qdr->qdf0[i + nr].sliba =
400 (unsigned long)irq_ptr_qs[i]->slib;
401
402 irq_ptr->qdr->qdf0[i + nr].sla =
403 (unsigned long)irq_ptr_qs[i]->sl;
404
405 irq_ptr->qdr->qdf0[i + nr].slsba =
406 (unsigned long)&irq_ptr_qs[i]->slsb.val[0];
407
408 irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4;
409 irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4;
410 irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4;
411 irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4;
412}
413
414static void setup_qdr(struct qdio_irq *irq_ptr,
415 struct qdio_initialize *qdio_init)
416{
417 int i;
418
419 irq_ptr->qdr->qfmt = qdio_init->q_format;
420 irq_ptr->qdr->ac = qdio_init->qdr_ac;
421 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
422 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
423 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4;
424 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
425 irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
426 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
427
428 for (i = 0; i < qdio_init->no_input_qs; i++)
429 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);
430
431 for (i = 0; i < qdio_init->no_output_qs; i++)
432 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
433 qdio_init->no_input_qs);
434}
435
436static void setup_qib(struct qdio_irq *irq_ptr,
437 struct qdio_initialize *init_data)
438{
439 if (qebsm_possible())
440 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
441
442 irq_ptr->qib.rflags |= init_data->qib_rflags;
443
444 irq_ptr->qib.qfmt = init_data->q_format;
445 if (init_data->no_input_qs)
446 irq_ptr->qib.isliba =
447 (unsigned long)(irq_ptr->input_qs[0]->slib);
448 if (init_data->no_output_qs)
449 irq_ptr->qib.osliba =
450 (unsigned long)(irq_ptr->output_qs[0]->slib);
451 memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
452}
453
454int qdio_setup_irq(struct qdio_initialize *init_data)
455{
456 struct ciw *ciw;
457 struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
458
459 memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
460 memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
461 memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
462 memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
463 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
464
465 irq_ptr->debugfs_dev = irq_ptr->debugfs_perf = NULL;
466 irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0;
467
468
469 memset(irq_ptr->qdr, 0, sizeof(struct qdr));
470
471 irq_ptr->int_parm = init_data->int_parm;
472 irq_ptr->nr_input_qs = init_data->no_input_qs;
473 irq_ptr->nr_output_qs = init_data->no_output_qs;
474 irq_ptr->cdev = init_data->cdev;
475 ccw_device_get_schid(irq_ptr->cdev, &irq_ptr->schid);
476 setup_queues(irq_ptr, init_data);
477
478 setup_qib(irq_ptr, init_data);
479 qdio_setup_thinint(irq_ptr);
480 set_impl_params(irq_ptr, init_data->qib_param_field_format,
481 init_data->qib_param_field,
482 init_data->input_slib_elements,
483 init_data->output_slib_elements);
484
485
486 setup_qdr(irq_ptr, init_data);
487
488
489
490
491 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
492 if (!ciw) {
493 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
494 return -EINVAL;
495 }
496 irq_ptr->equeue = *ciw;
497
498 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
499 if (!ciw) {
500 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
501 return -EINVAL;
502 }
503 irq_ptr->aqueue = *ciw;
504
505
506 spin_lock_irq(get_ccwdev_lock(irq_ptr->cdev));
507 irq_ptr->orig_handler = init_data->cdev->handler;
508 init_data->cdev->handler = qdio_int_handler;
509 spin_unlock_irq(get_ccwdev_lock(irq_ptr->cdev));
510 return 0;
511}
512
513void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
514 struct ccw_device *cdev)
515{
516 char s[80];
517
518 snprintf(s, 80, "qdio: %s %s on SC %x using "
519 "AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s%s%s\n",
520 dev_name(&cdev->dev),
521 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
522 ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
523 irq_ptr->schid.sch_no,
524 is_thinint_irq(irq_ptr),
525 (irq_ptr->sch_token) ? 1 : 0,
526 pci_out_supported(irq_ptr) ? 1 : 0,
527 css_general_characteristics.aif_tdd,
528 (irq_ptr->siga_flag.input) ? "R" : " ",
529 (irq_ptr->siga_flag.output) ? "W" : " ",
530 (irq_ptr->siga_flag.sync) ? "S" : " ",
531 (irq_ptr->siga_flag.sync_after_ai) ? "A" : " ",
532 (irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " ");
533 printk(KERN_INFO "%s", s);
534}
535
536int qdio_enable_async_operation(struct qdio_output_q *outq)
537{
538 outq->aobs = kcalloc(QDIO_MAX_BUFFERS_PER_Q, sizeof(struct qaob *),
539 GFP_ATOMIC);
540 if (!outq->aobs) {
541 outq->use_cq = 0;
542 return -ENOMEM;
543 }
544 outq->use_cq = 1;
545 return 0;
546}
547
548void qdio_disable_async_operation(struct qdio_output_q *q)
549{
550 kfree(q->aobs);
551 q->aobs = NULL;
552 q->use_cq = 0;
553}
554
555int __init qdio_setup_init(void)
556{
557 int rc;
558
559 qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
560 256, 0, NULL);
561 if (!qdio_q_cache)
562 return -ENOMEM;
563
564 qdio_aob_cache = kmem_cache_create("qdio_aob",
565 sizeof(struct qaob),
566 sizeof(struct qaob),
567 0,
568 NULL);
569 if (!qdio_aob_cache) {
570 rc = -ENOMEM;
571 goto free_qdio_q_cache;
572 }
573
574
575 DBF_EVENT("thinint:%1d",
576 (css_general_characteristics.aif_osa) ? 1 : 0);
577
578
579 DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
580 rc = 0;
581out:
582 return rc;
583free_qdio_q_cache:
584 kmem_cache_destroy(qdio_q_cache);
585 goto out;
586}
587
588void qdio_setup_exit(void)
589{
590 kmem_cache_destroy(qdio_aob_cache);
591 kmem_cache_destroy(qdio_q_cache);
592}
593
