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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
24static struct kmem_cache *qdio_q_cache;
25static struct kmem_cache *qdio_aob_cache;
26
27struct qaob *qdio_allocate_aob(void)
28{
29 return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
30}
31
32void qdio_release_aob(struct qaob *aob)
33{
34 kmem_cache_free(qdio_aob_cache, aob);
35}
36EXPORT_SYMBOL_GPL(qdio_release_aob);
37
38
39
40
41
42
43void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count)
44{
45 int pos;
46
47 for (pos = 0; pos < count; pos += QBUFF_PER_PAGE)
48 free_page((unsigned long) buf[pos]);
49}
50EXPORT_SYMBOL_GPL(qdio_free_buffers);
51
52
53
54
55
56
57int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count)
58{
59 int pos;
60
61 for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) {
62 buf[pos] = (void *) get_zeroed_page(GFP_KERNEL);
63 if (!buf[pos]) {
64 qdio_free_buffers(buf, count);
65 return -ENOMEM;
66 }
67 }
68 for (pos = 0; pos < count; pos++)
69 if (pos % QBUFF_PER_PAGE)
70 buf[pos] = buf[pos - 1] + 1;
71 return 0;
72}
73EXPORT_SYMBOL_GPL(qdio_alloc_buffers);
74
75
76
77
78
79
80void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count)
81{
82 int pos;
83
84 for (pos = 0; pos < count; pos++)
85 memset(buf[pos], 0, sizeof(struct qdio_buffer));
86}
87EXPORT_SYMBOL_GPL(qdio_reset_buffers);
88
89
90
91
92
93static inline int qebsm_possible(void)
94{
95 return css_general_characteristics.qebsm;
96}
97
98
99
100
101
102static void set_impl_params(struct qdio_irq *irq_ptr,
103 unsigned int qib_param_field_format,
104 unsigned char *qib_param_field,
105 unsigned long *input_slib_elements,
106 unsigned long *output_slib_elements)
107{
108 struct qdio_q *q;
109 int i, j;
110
111 if (!irq_ptr)
112 return;
113
114 irq_ptr->qib.pfmt = qib_param_field_format;
115 if (qib_param_field)
116 memcpy(irq_ptr->qib.parm, qib_param_field,
117 sizeof(irq_ptr->qib.parm));
118
119 if (!input_slib_elements)
120 goto output;
121
122 for_each_input_queue(irq_ptr, q, i) {
123 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
124 q->slib->slibe[j].parms =
125 input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
126 }
127output:
128 if (!output_slib_elements)
129 return;
130
131 for_each_output_queue(irq_ptr, q, i) {
132 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
133 q->slib->slibe[j].parms =
134 output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
135 }
136}
137
138static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
139{
140 struct qdio_q *q;
141 int i;
142
143 for (i = 0; i < nr_queues; i++) {
144 q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
145 if (!q)
146 return -ENOMEM;
147
148 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
149 if (!q->slib) {
150 kmem_cache_free(qdio_q_cache, q);
151 return -ENOMEM;
152 }
153 irq_ptr_qs[i] = q;
154 }
155 return 0;
156}
157
158int 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
169static 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
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}
183
184static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
185 struct qdio_buffer **sbals_array, int i)
186{
187 struct qdio_q *prev;
188 int j;
189
190 DBF_HEX(&q, sizeof(void *));
191 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);
192
193
194 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
195 q->sbal[j] = *sbals_array++;
196
197
198 if (i > 0) {
199 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
200 : irq_ptr->output_qs[i - 1];
201 prev->slib->nsliba = (unsigned long)q->slib;
202 }
203
204 q->slib->sla = (unsigned long)q->sl;
205 q->slib->slsba = (unsigned long)&q->slsb.val[0];
206
207
208 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
209 q->sl->element[j].sbal = virt_to_phys(q->sbal[j]);
210}
211
212static void setup_queues(struct qdio_irq *irq_ptr,
213 struct qdio_initialize *qdio_init)
214{
215 struct qdio_q *q;
216 struct qdio_outbuf_state *output_sbal_state_array =
217 qdio_init->output_sbal_state_array;
218 int i;
219
220 for_each_input_queue(irq_ptr, q, i) {
221 DBF_EVENT("inq:%1d", i);
222 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
223
224 q->is_input_q = 1;
225
226 setup_storage_lists(q, irq_ptr,
227 qdio_init->input_sbal_addr_array[i], i);
228
229 if (is_thinint_irq(irq_ptr)) {
230 tasklet_init(&q->tasklet, tiqdio_inbound_processing,
231 (unsigned long) q);
232 } else {
233 tasklet_init(&q->tasklet, qdio_inbound_processing,
234 (unsigned long) q);
235 }
236 }
237
238 for_each_output_queue(irq_ptr, q, i) {
239 DBF_EVENT("outq:%1d", i);
240 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
241
242 q->u.out.sbal_state = output_sbal_state_array;
243 output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q;
244
245 q->is_input_q = 0;
246 setup_storage_lists(q, irq_ptr,
247 qdio_init->output_sbal_addr_array[i], i);
248
249 tasklet_init(&q->tasklet, qdio_outbound_processing,
250 (unsigned long) q);
251 timer_setup(&q->u.out.timer, qdio_outbound_timer, 0);
252 }
253}
254
255static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
256{
257 if (qdioac & AC1_SIGA_INPUT_NEEDED)
258 irq_ptr->siga_flag.input = 1;
259 if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
260 irq_ptr->siga_flag.output = 1;
261 if (qdioac & AC1_SIGA_SYNC_NEEDED)
262 irq_ptr->siga_flag.sync = 1;
263 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
264 irq_ptr->siga_flag.sync_after_ai = 1;
265 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
266 irq_ptr->siga_flag.sync_out_after_pci = 1;
267}
268
269static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
270 unsigned char qdioac, unsigned long token)
271{
272 if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
273 goto no_qebsm;
274 if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
275 (!(qdioac & AC1_SC_QEBSM_ENABLED)))
276 goto no_qebsm;
277
278 irq_ptr->sch_token = token;
279
280 DBF_EVENT("V=V:1");
281 DBF_EVENT("%8lx", irq_ptr->sch_token);
282 return;
283
284no_qebsm:
285 irq_ptr->sch_token = 0;
286 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
287 DBF_EVENT("noV=V");
288}
289
290
291
292
293
294int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
295 struct subchannel_id *schid,
296 struct qdio_ssqd_desc *data)
297{
298 struct chsc_ssqd_area *ssqd;
299 int rc;
300
301 DBF_EVENT("getssqd:%4x", schid->sch_no);
302 if (!irq_ptr) {
303 ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
304 if (!ssqd)
305 return -ENOMEM;
306 } else {
307 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
308 }
309
310 rc = chsc_ssqd(*schid, ssqd);
311 if (rc)
312 goto out;
313
314 if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
315 !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
316 (ssqd->qdio_ssqd.sch != schid->sch_no))
317 rc = -EINVAL;
318
319 if (!rc)
320 memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));
321
322out:
323 if (!irq_ptr)
324 free_page((unsigned long)ssqd);
325
326 return rc;
327}
328
329void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
330{
331 unsigned char qdioac;
332 int rc;
333
334 rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
335 if (rc) {
336 DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
337 DBF_ERROR("rc:%x", rc);
338
339 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
340 AC1_SIGA_SYNC_NEEDED;
341 } else
342 qdioac = irq_ptr->ssqd_desc.qdioac1;
343
344 check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
345 process_ac_flags(irq_ptr, qdioac);
346 DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
347 DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
348}
349
350void qdio_release_memory(struct qdio_irq *irq_ptr)
351{
352 struct qdio_q *q;
353 int i;
354
355
356
357
358
359 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
360 q = irq_ptr->input_qs[i];
361 if (q) {
362 free_page((unsigned long) q->slib);
363 kmem_cache_free(qdio_q_cache, q);
364 }
365 }
366 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
367 q = irq_ptr->output_qs[i];
368 if (q) {
369 if (q->u.out.use_cq) {
370 int n;
371
372 for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) {
373 struct qaob *aob = q->u.out.aobs[n];
374 if (aob) {
375 qdio_release_aob(aob);
376 q->u.out.aobs[n] = NULL;
377 }
378 }
379
380 qdio_disable_async_operation(&q->u.out);
381 }
382 free_page((unsigned long) q->slib);
383 kmem_cache_free(qdio_q_cache, q);
384 }
385 }
386 free_page((unsigned long) irq_ptr->qdr);
387 free_page(irq_ptr->chsc_page);
388 free_page((unsigned long) irq_ptr);
389}
390
391static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
392 struct qdio_q **irq_ptr_qs,
393 int i, int nr)
394{
395 irq_ptr->qdr->qdf0[i + nr].sliba =
396 (unsigned long)irq_ptr_qs[i]->slib;
397
398 irq_ptr->qdr->qdf0[i + nr].sla =
399 (unsigned long)irq_ptr_qs[i]->sl;
400
401 irq_ptr->qdr->qdf0[i + nr].slsba =
402 (unsigned long)&irq_ptr_qs[i]->slsb.val[0];
403
404 irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4;
405 irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4;
406 irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4;
407 irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4;
408}
409
410static void setup_qdr(struct qdio_irq *irq_ptr,
411 struct qdio_initialize *qdio_init)
412{
413 int i;
414
415 irq_ptr->qdr->qfmt = qdio_init->q_format;
416 irq_ptr->qdr->ac = qdio_init->qdr_ac;
417 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
418 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
419 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4;
420 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
421 irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
422 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
423
424 for (i = 0; i < qdio_init->no_input_qs; i++)
425 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);
426
427 for (i = 0; i < qdio_init->no_output_qs; i++)
428 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
429 qdio_init->no_input_qs);
430}
431
432static void setup_qib(struct qdio_irq *irq_ptr,
433 struct qdio_initialize *init_data)
434{
435 if (qebsm_possible())
436 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
437
438 irq_ptr->qib.rflags |= init_data->qib_rflags;
439
440 irq_ptr->qib.qfmt = init_data->q_format;
441 if (init_data->no_input_qs)
442 irq_ptr->qib.isliba =
443 (unsigned long)(irq_ptr->input_qs[0]->slib);
444 if (init_data->no_output_qs)
445 irq_ptr->qib.osliba =
446 (unsigned long)(irq_ptr->output_qs[0]->slib);
447 memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
448}
449
450int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data)
451{
452 struct ccw_device *cdev = irq_ptr->cdev;
453 struct ciw *ciw;
454
455 memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
456 memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
457 memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
458 memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
459 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
460
461 irq_ptr->debugfs_dev = NULL;
462 irq_ptr->sch_token = irq_ptr->perf_stat_enabled = 0;
463 irq_ptr->state = QDIO_IRQ_STATE_INACTIVE;
464
465
466 memset(irq_ptr->qdr, 0, sizeof(struct qdr));
467
468 irq_ptr->int_parm = init_data->int_parm;
469 irq_ptr->nr_input_qs = init_data->no_input_qs;
470 irq_ptr->nr_output_qs = init_data->no_output_qs;
471 irq_ptr->scan_threshold = init_data->scan_threshold;
472 ccw_device_get_schid(cdev, &irq_ptr->schid);
473 setup_queues(irq_ptr, init_data);
474
475 if (init_data->irq_poll) {
476 irq_ptr->irq_poll = init_data->irq_poll;
477 set_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state);
478 } else {
479 irq_ptr->irq_poll = NULL;
480 }
481
482 setup_qib(irq_ptr, init_data);
483 qdio_setup_thinint(irq_ptr);
484 set_impl_params(irq_ptr, init_data->qib_param_field_format,
485 init_data->qib_param_field,
486 init_data->input_slib_elements,
487 init_data->output_slib_elements);
488
489
490 setup_qdr(irq_ptr, init_data);
491
492
493
494
495 ciw = ccw_device_get_ciw(cdev, CIW_TYPE_EQUEUE);
496 if (!ciw) {
497 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
498 return -EINVAL;
499 }
500 irq_ptr->equeue = *ciw;
501
502 ciw = ccw_device_get_ciw(cdev, CIW_TYPE_AQUEUE);
503 if (!ciw) {
504 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
505 return -EINVAL;
506 }
507 irq_ptr->aqueue = *ciw;
508
509
510 spin_lock_irq(get_ccwdev_lock(cdev));
511 irq_ptr->orig_handler = cdev->handler;
512 cdev->handler = qdio_int_handler;
513 spin_unlock_irq(get_ccwdev_lock(cdev));
514 return 0;
515}
516
517void qdio_print_subchannel_info(struct qdio_irq *irq_ptr)
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(&irq_ptr->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 pci_out_supported(irq_ptr) ? 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
539int qdio_enable_async_operation(struct qdio_output_q *outq)
540{
541 outq->aobs = kcalloc(QDIO_MAX_BUFFERS_PER_Q, sizeof(struct qaob *),
542 GFP_KERNEL);
543 if (!outq->aobs) {
544 outq->use_cq = 0;
545 return -ENOMEM;
546 }
547 outq->use_cq = 1;
548 return 0;
549}
550
551void 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
558int __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
578 DBF_EVENT("thinint:%1d",
579 (css_general_characteristics.aif_osa) ? 1 : 0);
580
581
582 DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
583 rc = 0;
584out:
585 return rc;
586free_qdio_q_cache:
587 kmem_cache_destroy(qdio_q_cache);
588 goto out;
589}
590
591void qdio_setup_exit(void)
592{
593 kmem_cache_destroy(qdio_aob_cache);
594 kmem_cache_destroy(qdio_q_cache);
595}
596
