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7#include <linux/kernel.h>
8#include <linux/slab.h>
9#include <linux/export.h>
10#include <asm/qdio.h>
11
12#include "cio.h"
13#include "css.h"
14#include "device.h"
15#include "ioasm.h"
16#include "chsc.h"
17#include "qdio.h"
18#include "qdio_debug.h"
19
20static struct kmem_cache *qdio_q_cache;
21static struct kmem_cache *qdio_aob_cache;
22
23struct qaob *qdio_allocate_aob(void)
24{
25 return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
26}
27EXPORT_SYMBOL_GPL(qdio_allocate_aob);
28
29void qdio_release_aob(struct qaob *aob)
30{
31 kmem_cache_free(qdio_aob_cache, aob);
32}
33EXPORT_SYMBOL_GPL(qdio_release_aob);
34
35
36
37
38
39static inline int qebsm_possible(void)
40{
41#ifdef CONFIG_64BIT
42 return css_general_characteristics.qebsm;
43#endif
44 return 0;
45}
46
47
48
49
50
51static void set_impl_params(struct qdio_irq *irq_ptr,
52 unsigned int qib_param_field_format,
53 unsigned char *qib_param_field,
54 unsigned long *input_slib_elements,
55 unsigned long *output_slib_elements)
56{
57 struct qdio_q *q;
58 int i, j;
59
60 if (!irq_ptr)
61 return;
62
63 irq_ptr->qib.pfmt = qib_param_field_format;
64 if (qib_param_field)
65 memcpy(irq_ptr->qib.parm, qib_param_field,
66 QDIO_MAX_BUFFERS_PER_Q);
67
68 if (!input_slib_elements)
69 goto output;
70
71 for_each_input_queue(irq_ptr, q, i) {
72 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
73 q->slib->slibe[j].parms =
74 input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
75 }
76output:
77 if (!output_slib_elements)
78 return;
79
80 for_each_output_queue(irq_ptr, q, i) {
81 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
82 q->slib->slibe[j].parms =
83 output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
84 }
85}
86
87static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
88{
89 struct qdio_q *q;
90 int i;
91
92 for (i = 0; i < nr_queues; i++) {
93 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
94 if (!q)
95 return -ENOMEM;
96
97 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
98 if (!q->slib) {
99 kmem_cache_free(qdio_q_cache, q);
100 return -ENOMEM;
101 }
102 irq_ptr_qs[i] = q;
103 }
104 return 0;
105}
106
107int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
108{
109 int rc;
110
111 rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
112 if (rc)
113 return rc;
114 rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
115 return rc;
116}
117
118static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
119 qdio_handler_t *handler, int i)
120{
121 struct slib *slib = q->slib;
122
123
124 memset(q, 0, sizeof(*q));
125 memset(slib, 0, PAGE_SIZE);
126 q->slib = slib;
127 q->irq_ptr = irq_ptr;
128 q->mask = 1 << (31 - i);
129 q->nr = i;
130 q->handler = handler;
131}
132
133static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
134 void **sbals_array, int i)
135{
136 struct qdio_q *prev;
137 int j;
138
139 DBF_HEX(&q, sizeof(void *));
140 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);
141
142
143 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
144 q->sbal[j] = *sbals_array++;
145
146
147 if (i > 0) {
148 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
149 : irq_ptr->output_qs[i - 1];
150 prev->slib->nsliba = (unsigned long)q->slib;
151 }
152
153 q->slib->sla = (unsigned long)q->sl;
154 q->slib->slsba = (unsigned long)&q->slsb.val[0];
155
156
157 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
158 q->sl->element[j].sbal = (unsigned long)q->sbal[j];
159}
160
161static void setup_queues(struct qdio_irq *irq_ptr,
162 struct qdio_initialize *qdio_init)
163{
164 struct qdio_q *q;
165 void **input_sbal_array = qdio_init->input_sbal_addr_array;
166 void **output_sbal_array = qdio_init->output_sbal_addr_array;
167 struct qdio_outbuf_state *output_sbal_state_array =
168 qdio_init->output_sbal_state_array;
169 int i;
170
171 for_each_input_queue(irq_ptr, q, i) {
172 DBF_EVENT("inq:%1d", i);
173 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
174
175 q->is_input_q = 1;
176 q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ?
177 qdio_init->queue_start_poll_array[i] : NULL;
178
179 setup_storage_lists(q, irq_ptr, input_sbal_array, i);
180 input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
181
182 if (is_thinint_irq(irq_ptr)) {
183 tasklet_init(&q->tasklet, tiqdio_inbound_processing,
184 (unsigned long) q);
185 } else {
186 tasklet_init(&q->tasklet, qdio_inbound_processing,
187 (unsigned long) q);
188 }
189 }
190
191 for_each_output_queue(irq_ptr, q, i) {
192 DBF_EVENT("outq:%1d", i);
193 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
194
195 q->u.out.sbal_state = output_sbal_state_array;
196 output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q;
197
198 q->is_input_q = 0;
199 q->u.out.scan_threshold = qdio_init->scan_threshold;
200 setup_storage_lists(q, irq_ptr, output_sbal_array, i);
201 output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
202
203 tasklet_init(&q->tasklet, qdio_outbound_processing,
204 (unsigned long) q);
205 setup_timer(&q->u.out.timer, (void(*)(unsigned long))
206 &qdio_outbound_timer, (unsigned long)q);
207 }
208}
209
210static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
211{
212 if (qdioac & AC1_SIGA_INPUT_NEEDED)
213 irq_ptr->siga_flag.input = 1;
214 if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
215 irq_ptr->siga_flag.output = 1;
216 if (qdioac & AC1_SIGA_SYNC_NEEDED)
217 irq_ptr->siga_flag.sync = 1;
218 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
219 irq_ptr->siga_flag.sync_after_ai = 1;
220 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
221 irq_ptr->siga_flag.sync_out_after_pci = 1;
222}
223
224static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
225 unsigned char qdioac, unsigned long token)
226{
227 if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
228 goto no_qebsm;
229 if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
230 (!(qdioac & AC1_SC_QEBSM_ENABLED)))
231 goto no_qebsm;
232
233 irq_ptr->sch_token = token;
234
235 DBF_EVENT("V=V:1");
236 DBF_EVENT("%8lx", irq_ptr->sch_token);
237 return;
238
239no_qebsm:
240 irq_ptr->sch_token = 0;
241 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
242 DBF_EVENT("noV=V");
243}
244
245
246
247
248
249int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
250 struct subchannel_id *schid,
251 struct qdio_ssqd_desc *data)
252{
253 struct chsc_ssqd_area *ssqd;
254 int rc;
255
256 DBF_EVENT("getssqd:%4x", schid->sch_no);
257 if (!irq_ptr) {
258 ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
259 if (!ssqd)
260 return -ENOMEM;
261 } else {
262 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
263 }
264
265 rc = chsc_ssqd(*schid, ssqd);
266 if (rc)
267 goto out;
268
269 if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
270 !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
271 (ssqd->qdio_ssqd.sch != schid->sch_no))
272 rc = -EINVAL;
273
274 if (!rc)
275 memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));
276
277out:
278 if (!irq_ptr)
279 free_page((unsigned long)ssqd);
280
281 return rc;
282}
283
284void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
285{
286 unsigned char qdioac;
287 int rc;
288
289 rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
290 if (rc) {
291 DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
292 DBF_ERROR("rc:%x", rc);
293
294 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
295 AC1_SIGA_SYNC_NEEDED;
296 } else
297 qdioac = irq_ptr->ssqd_desc.qdioac1;
298
299 check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
300 process_ac_flags(irq_ptr, qdioac);
301 DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
302 DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
303}
304
305void qdio_release_memory(struct qdio_irq *irq_ptr)
306{
307 struct qdio_q *q;
308 int i;
309
310
311
312
313
314 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
315 q = irq_ptr->input_qs[i];
316 if (q) {
317 free_page((unsigned long) q->slib);
318 kmem_cache_free(qdio_q_cache, q);
319 }
320 }
321 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
322 q = irq_ptr->output_qs[i];
323 if (q) {
324 if (q->u.out.use_cq) {
325 int n;
326
327 for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) {
328 struct qaob *aob = q->u.out.aobs[n];
329 if (aob) {
330 qdio_release_aob(aob);
331 q->u.out.aobs[n] = NULL;
332 }
333 }
334
335 qdio_disable_async_operation(&q->u.out);
336 }
337 free_page((unsigned long) q->slib);
338 kmem_cache_free(qdio_q_cache, q);
339 }
340 }
341 free_page((unsigned long) irq_ptr->qdr);
342 free_page(irq_ptr->chsc_page);
343 free_page((unsigned long) irq_ptr);
344}
345
346static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
347 struct qdio_q **irq_ptr_qs,
348 int i, int nr)
349{
350 irq_ptr->qdr->qdf0[i + nr].sliba =
351 (unsigned long)irq_ptr_qs[i]->slib;
352
353 irq_ptr->qdr->qdf0[i + nr].sla =
354 (unsigned long)irq_ptr_qs[i]->sl;
355
356 irq_ptr->qdr->qdf0[i + nr].slsba =
357 (unsigned long)&irq_ptr_qs[i]->slsb.val[0];
358
359 irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4;
360 irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4;
361 irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4;
362 irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4;
363}
364
365static void setup_qdr(struct qdio_irq *irq_ptr,
366 struct qdio_initialize *qdio_init)
367{
368 int i;
369
370 irq_ptr->qdr->qfmt = qdio_init->q_format;
371 irq_ptr->qdr->ac = qdio_init->qdr_ac;
372 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
373 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
374 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4;
375 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
376 irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
377 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
378
379 for (i = 0; i < qdio_init->no_input_qs; i++)
380 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);
381
382 for (i = 0; i < qdio_init->no_output_qs; i++)
383 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
384 qdio_init->no_input_qs);
385}
386
387static void setup_qib(struct qdio_irq *irq_ptr,
388 struct qdio_initialize *init_data)
389{
390 if (qebsm_possible())
391 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
392
393 irq_ptr->qib.rflags |= init_data->qib_rflags;
394
395 irq_ptr->qib.qfmt = init_data->q_format;
396 if (init_data->no_input_qs)
397 irq_ptr->qib.isliba =
398 (unsigned long)(irq_ptr->input_qs[0]->slib);
399 if (init_data->no_output_qs)
400 irq_ptr->qib.osliba =
401 (unsigned long)(irq_ptr->output_qs[0]->slib);
402 memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
403}
404
405int qdio_setup_irq(struct qdio_initialize *init_data)
406{
407 struct ciw *ciw;
408 struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
409 int rc;
410
411 memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
412 memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
413 memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
414 memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
415 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
416
417 irq_ptr->debugfs_dev = irq_ptr->debugfs_perf = NULL;
418 irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0;
419
420
421 memset(irq_ptr->qdr, 0, sizeof(struct qdr));
422
423 irq_ptr->int_parm = init_data->int_parm;
424 irq_ptr->nr_input_qs = init_data->no_input_qs;
425 irq_ptr->nr_output_qs = init_data->no_output_qs;
426 irq_ptr->cdev = init_data->cdev;
427 ccw_device_get_schid(irq_ptr->cdev, &irq_ptr->schid);
428 setup_queues(irq_ptr, init_data);
429
430 setup_qib(irq_ptr, init_data);
431 qdio_setup_thinint(irq_ptr);
432 set_impl_params(irq_ptr, init_data->qib_param_field_format,
433 init_data->qib_param_field,
434 init_data->input_slib_elements,
435 init_data->output_slib_elements);
436
437
438 setup_qdr(irq_ptr, init_data);
439
440
441
442
443 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
444 if (!ciw) {
445 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
446 rc = -EINVAL;
447 goto out_err;
448 }
449 irq_ptr->equeue = *ciw;
450
451 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
452 if (!ciw) {
453 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
454 rc = -EINVAL;
455 goto out_err;
456 }
457 irq_ptr->aqueue = *ciw;
458
459
460 irq_ptr->orig_handler = init_data->cdev->handler;
461 init_data->cdev->handler = qdio_int_handler;
462 return 0;
463out_err:
464 qdio_release_memory(irq_ptr);
465 return rc;
466}
467
468void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
469 struct ccw_device *cdev)
470{
471 char s[80];
472
473 snprintf(s, 80, "qdio: %s %s on SC %x using "
474 "AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s%s%s\n",
475 dev_name(&cdev->dev),
476 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
477 ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
478 irq_ptr->schid.sch_no,
479 is_thinint_irq(irq_ptr),
480 (irq_ptr->sch_token) ? 1 : 0,
481 (irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 1 : 0,
482 css_general_characteristics.aif_tdd,
483 (irq_ptr->siga_flag.input) ? "R" : " ",
484 (irq_ptr->siga_flag.output) ? "W" : " ",
485 (irq_ptr->siga_flag.sync) ? "S" : " ",
486 (irq_ptr->siga_flag.sync_after_ai) ? "A" : " ",
487 (irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " ");
488 printk(KERN_INFO "%s", s);
489}
490
491int qdio_enable_async_operation(struct qdio_output_q *outq)
492{
493 outq->aobs = kzalloc(sizeof(struct qaob *) * QDIO_MAX_BUFFERS_PER_Q,
494 GFP_ATOMIC);
495 if (!outq->aobs) {
496 outq->use_cq = 0;
497 return -ENOMEM;
498 }
499 outq->use_cq = 1;
500 return 0;
501}
502
503void qdio_disable_async_operation(struct qdio_output_q *q)
504{
505 kfree(q->aobs);
506 q->aobs = NULL;
507 q->use_cq = 0;
508}
509
510int __init qdio_setup_init(void)
511{
512 int rc;
513
514 qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
515 256, 0, NULL);
516 if (!qdio_q_cache)
517 return -ENOMEM;
518
519 qdio_aob_cache = kmem_cache_create("qdio_aob",
520 sizeof(struct qaob),
521 sizeof(struct qaob),
522 0,
523 NULL);
524 if (!qdio_aob_cache) {
525 rc = -ENOMEM;
526 goto free_qdio_q_cache;
527 }
528
529
530 DBF_EVENT("thinint:%1d",
531 (css_general_characteristics.aif_osa) ? 1 : 0);
532
533
534 DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
535 rc = 0;
536out:
537 return rc;
538free_qdio_q_cache:
539 kmem_cache_destroy(qdio_q_cache);
540 goto out;
541}
542
543void qdio_setup_exit(void)
544{
545 kmem_cache_destroy(qdio_aob_cache);
546 kmem_cache_destroy(qdio_q_cache);
547}
548
