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s390: add missing module.h/export.h includes
[deliverable/linux.git] / drivers / s390 / cio / qdio_setup.c
1 /*
2 * driver/s390/cio/qdio_setup.c
3 *
4 * qdio queue initialization
5 *
6 * Copyright (C) IBM Corp. 2008
7 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
8 */
9 #include <linux/kernel.h>
10 #include <linux/slab.h>
11 #include <linux/export.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 static struct kmem_cache *qdio_q_cache;
23 static struct kmem_cache *qdio_aob_cache;
24
25 struct qaob *qdio_allocate_aob()
26 {
27 struct qaob *aob;
28
29 aob = kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
30 return aob;
31 }
32 EXPORT_SYMBOL_GPL(qdio_allocate_aob);
33
34 void qdio_release_aob(struct qaob *aob)
35 {
36 kmem_cache_free(qdio_aob_cache, aob);
37 }
38 EXPORT_SYMBOL_GPL(qdio_release_aob);
39
40 /*
41 * qebsm is only available under 64bit but the adapter sets the feature
42 * flag anyway, so we manually override it.
43 */
44 static inline int qebsm_possible(void)
45 {
46 #ifdef CONFIG_64BIT
47 return css_general_characteristics.qebsm;
48 #endif
49 return 0;
50 }
51
52 /*
53 * qib_param_field: pointer to 128 bytes or NULL, if no param field
54 * nr_input_qs: pointer to nr_queues*128 words of data or NULL
55 */
56 static void set_impl_params(struct qdio_irq *irq_ptr,
57 unsigned int qib_param_field_format,
58 unsigned char *qib_param_field,
59 unsigned long *input_slib_elements,
60 unsigned long *output_slib_elements)
61 {
62 struct qdio_q *q;
63 int i, j;
64
65 if (!irq_ptr)
66 return;
67
68 irq_ptr->qib.pfmt = qib_param_field_format;
69 if (qib_param_field)
70 memcpy(irq_ptr->qib.parm, qib_param_field,
71 QDIO_MAX_BUFFERS_PER_Q);
72
73 if (!input_slib_elements)
74 goto output;
75
76 for_each_input_queue(irq_ptr, q, i) {
77 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
78 q->slib->slibe[j].parms =
79 input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
80 }
81 output:
82 if (!output_slib_elements)
83 return;
84
85 for_each_output_queue(irq_ptr, q, i) {
86 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
87 q->slib->slibe[j].parms =
88 output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j];
89 }
90 }
91
92 static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
93 {
94 struct qdio_q *q;
95 int i;
96
97 for (i = 0; i < nr_queues; i++) {
98 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
99 if (!q)
100 return -ENOMEM;
101
102 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
103 if (!q->slib) {
104 kmem_cache_free(qdio_q_cache, q);
105 return -ENOMEM;
106 }
107 irq_ptr_qs[i] = q;
108 }
109 return 0;
110 }
111
112 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
113 {
114 int rc;
115
116 rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
117 if (rc)
118 return rc;
119 rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
120 return rc;
121 }
122
123 static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
124 qdio_handler_t *handler, int i)
125 {
126 struct slib *slib = q->slib;
127
128 /* queue must be cleared for qdio_establish */
129 memset(q, 0, sizeof(*q));
130 memset(slib, 0, PAGE_SIZE);
131 q->slib = slib;
132 q->irq_ptr = irq_ptr;
133 q->mask = 1 << (31 - i);
134 q->nr = i;
135 q->handler = handler;
136 }
137
138 static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
139 void **sbals_array, int i)
140 {
141 struct qdio_q *prev;
142 int j;
143
144 DBF_HEX(&q, sizeof(void *));
145 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);
146
147 /* fill in sbal */
148 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) {
149 q->sbal[j] = *sbals_array++;
150 BUG_ON((unsigned long)q->sbal[j] & 0xff);
151 }
152
153 /* fill in slib */
154 if (i > 0) {
155 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
156 : irq_ptr->output_qs[i - 1];
157 prev->slib->nsliba = (unsigned long)q->slib;
158 }
159
160 q->slib->sla = (unsigned long)q->sl;
161 q->slib->slsba = (unsigned long)&q->slsb.val[0];
162
163 /* fill in sl */
164 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
165 q->sl->element[j].sbal = (unsigned long)q->sbal[j];
166 }
167
168 static void setup_queues(struct qdio_irq *irq_ptr,
169 struct qdio_initialize *qdio_init)
170 {
171 struct qdio_q *q;
172 void **input_sbal_array = qdio_init->input_sbal_addr_array;
173 void **output_sbal_array = qdio_init->output_sbal_addr_array;
174 struct qdio_outbuf_state *output_sbal_state_array =
175 qdio_init->output_sbal_state_array;
176 int i;
177
178 for_each_input_queue(irq_ptr, q, i) {
179 DBF_EVENT("inq:%1d", i);
180 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
181
182 q->is_input_q = 1;
183 q->u.in.queue_start_poll = qdio_init->queue_start_poll[i];
184
185 setup_storage_lists(q, irq_ptr, input_sbal_array, i);
186 input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
187
188 if (is_thinint_irq(irq_ptr)) {
189 tasklet_init(&q->tasklet, tiqdio_inbound_processing,
190 (unsigned long) q);
191 } else {
192 tasklet_init(&q->tasklet, qdio_inbound_processing,
193 (unsigned long) q);
194 }
195 }
196
197 for_each_output_queue(irq_ptr, q, i) {
198 DBF_EVENT("outq:%1d", i);
199 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
200
201 q->u.out.sbal_state = output_sbal_state_array;
202 output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q;
203
204 q->is_input_q = 0;
205 q->u.out.scan_threshold = qdio_init->scan_threshold;
206 setup_storage_lists(q, irq_ptr, output_sbal_array, i);
207 output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
208
209 tasklet_init(&q->tasklet, qdio_outbound_processing,
210 (unsigned long) q);
211 setup_timer(&q->u.out.timer, (void(*)(unsigned long))
212 &qdio_outbound_timer, (unsigned long)q);
213 }
214 }
215
216 static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
217 {
218 if (qdioac & AC1_SIGA_INPUT_NEEDED)
219 irq_ptr->siga_flag.input = 1;
220 if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
221 irq_ptr->siga_flag.output = 1;
222 if (qdioac & AC1_SIGA_SYNC_NEEDED)
223 irq_ptr->siga_flag.sync = 1;
224 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
225 irq_ptr->siga_flag.sync_after_ai = 1;
226 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
227 irq_ptr->siga_flag.sync_out_after_pci = 1;
228 }
229
230 static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
231 unsigned char qdioac, unsigned long token)
232 {
233 if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
234 goto no_qebsm;
235 if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
236 (!(qdioac & AC1_SC_QEBSM_ENABLED)))
237 goto no_qebsm;
238
239 irq_ptr->sch_token = token;
240
241 DBF_EVENT("V=V:1");
242 DBF_EVENT("%8lx", irq_ptr->sch_token);
243 return;
244
245 no_qebsm:
246 irq_ptr->sch_token = 0;
247 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
248 DBF_EVENT("noV=V");
249 }
250
251 /*
252 * If there is a qdio_irq we use the chsc_page and store the information
253 * in the qdio_irq, otherwise we copy it to the specified structure.
254 */
255 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
256 struct subchannel_id *schid,
257 struct qdio_ssqd_desc *data)
258 {
259 struct chsc_ssqd_area *ssqd;
260 int rc;
261
262 DBF_EVENT("getssqd:%4x", schid->sch_no);
263 if (irq_ptr != NULL)
264 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
265 else
266 ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
267 memset(ssqd, 0, PAGE_SIZE);
268
269 ssqd->request = (struct chsc_header) {
270 .length = 0x0010,
271 .code = 0x0024,
272 };
273 ssqd->first_sch = schid->sch_no;
274 ssqd->last_sch = schid->sch_no;
275 ssqd->ssid = schid->ssid;
276
277 if (chsc(ssqd))
278 return -EIO;
279 rc = chsc_error_from_response(ssqd->response.code);
280 if (rc)
281 return rc;
282
283 if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
284 !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
285 (ssqd->qdio_ssqd.sch != schid->sch_no))
286 return -EINVAL;
287
288 if (irq_ptr != NULL)
289 memcpy(&irq_ptr->ssqd_desc, &ssqd->qdio_ssqd,
290 sizeof(struct qdio_ssqd_desc));
291 else {
292 memcpy(data, &ssqd->qdio_ssqd,
293 sizeof(struct qdio_ssqd_desc));
294 free_page((unsigned long)ssqd);
295 }
296 return 0;
297 }
298
299 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
300 {
301 unsigned char qdioac;
302 int rc;
303
304 rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, NULL);
305 if (rc) {
306 DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
307 DBF_ERROR("rc:%x", rc);
308 /* all flags set, worst case */
309 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
310 AC1_SIGA_SYNC_NEEDED;
311 } else
312 qdioac = irq_ptr->ssqd_desc.qdioac1;
313
314 check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
315 process_ac_flags(irq_ptr, qdioac);
316 DBF_EVENT("qdioac:%4x", qdioac);
317 }
318
319 void qdio_release_memory(struct qdio_irq *irq_ptr)
320 {
321 struct qdio_q *q;
322 int i;
323
324 /*
325 * Must check queue array manually since irq_ptr->nr_input_queues /
326 * irq_ptr->nr_input_queues may not yet be set.
327 */
328 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
329 q = irq_ptr->input_qs[i];
330 if (q) {
331 free_page((unsigned long) q->slib);
332 kmem_cache_free(qdio_q_cache, q);
333 }
334 }
335 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
336 q = irq_ptr->output_qs[i];
337 if (q) {
338 if (q->u.out.use_cq) {
339 int n;
340
341 for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) {
342 struct qaob *aob = q->u.out.aobs[n];
343 if (aob) {
344 qdio_release_aob(aob);
345 q->u.out.aobs[n] = NULL;
346 }
347 }
348
349 qdio_disable_async_operation(&q->u.out);
350 }
351 free_page((unsigned long) q->slib);
352 kmem_cache_free(qdio_q_cache, q);
353 }
354 }
355 free_page((unsigned long) irq_ptr->qdr);
356 free_page(irq_ptr->chsc_page);
357 free_page((unsigned long) irq_ptr);
358 }
359
360 static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
361 struct qdio_q **irq_ptr_qs,
362 int i, int nr)
363 {
364 irq_ptr->qdr->qdf0[i + nr].sliba =
365 (unsigned long)irq_ptr_qs[i]->slib;
366
367 irq_ptr->qdr->qdf0[i + nr].sla =
368 (unsigned long)irq_ptr_qs[i]->sl;
369
370 irq_ptr->qdr->qdf0[i + nr].slsba =
371 (unsigned long)&irq_ptr_qs[i]->slsb.val[0];
372
373 irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4;
374 irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4;
375 irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4;
376 irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4;
377 }
378
379 static void setup_qdr(struct qdio_irq *irq_ptr,
380 struct qdio_initialize *qdio_init)
381 {
382 int i;
383
384 irq_ptr->qdr->qfmt = qdio_init->q_format;
385 irq_ptr->qdr->ac = qdio_init->qdr_ac;
386 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
387 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
388 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
389 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
390 irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
391 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
392
393 for (i = 0; i < qdio_init->no_input_qs; i++)
394 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);
395
396 for (i = 0; i < qdio_init->no_output_qs; i++)
397 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
398 qdio_init->no_input_qs);
399 }
400
401 static void setup_qib(struct qdio_irq *irq_ptr,
402 struct qdio_initialize *init_data)
403 {
404 if (qebsm_possible())
405 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
406
407 irq_ptr->qib.rflags |= init_data->qib_rflags;
408
409 irq_ptr->qib.qfmt = init_data->q_format;
410 if (init_data->no_input_qs)
411 irq_ptr->qib.isliba =
412 (unsigned long)(irq_ptr->input_qs[0]->slib);
413 if (init_data->no_output_qs)
414 irq_ptr->qib.osliba =
415 (unsigned long)(irq_ptr->output_qs[0]->slib);
416 memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
417 }
418
419 int qdio_setup_irq(struct qdio_initialize *init_data)
420 {
421 struct ciw *ciw;
422 struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
423 int rc;
424
425 memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
426 memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
427 memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
428 memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
429 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
430
431 irq_ptr->debugfs_dev = irq_ptr->debugfs_perf = NULL;
432 irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0;
433
434 /* wipes qib.ac, required by ar7063 */
435 memset(irq_ptr->qdr, 0, sizeof(struct qdr));
436
437 irq_ptr->int_parm = init_data->int_parm;
438 irq_ptr->nr_input_qs = init_data->no_input_qs;
439 irq_ptr->nr_output_qs = init_data->no_output_qs;
440
441 irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
442 irq_ptr->cdev = init_data->cdev;
443 setup_queues(irq_ptr, init_data);
444
445 setup_qib(irq_ptr, init_data);
446 qdio_setup_thinint(irq_ptr);
447 set_impl_params(irq_ptr, init_data->qib_param_field_format,
448 init_data->qib_param_field,
449 init_data->input_slib_elements,
450 init_data->output_slib_elements);
451
452 /* fill input and output descriptors */
453 setup_qdr(irq_ptr, init_data);
454
455 /* qdr, qib, sls, slsbs, slibs, sbales are filled now */
456
457 /* get qdio commands */
458 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
459 if (!ciw) {
460 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
461 rc = -EINVAL;
462 goto out_err;
463 }
464 irq_ptr->equeue = *ciw;
465
466 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
467 if (!ciw) {
468 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
469 rc = -EINVAL;
470 goto out_err;
471 }
472 irq_ptr->aqueue = *ciw;
473
474 /* set new interrupt handler */
475 irq_ptr->orig_handler = init_data->cdev->handler;
476 init_data->cdev->handler = qdio_int_handler;
477 return 0;
478 out_err:
479 qdio_release_memory(irq_ptr);
480 return rc;
481 }
482
483 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
484 struct ccw_device *cdev)
485 {
486 char s[80];
487
488 snprintf(s, 80, "qdio: %s %s on SC %x using "
489 "AI:%d QEBSM:%d PCI:%d TDD:%d SIGA:%s%s%s%s%s\n",
490 dev_name(&cdev->dev),
491 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
492 ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
493 irq_ptr->schid.sch_no,
494 is_thinint_irq(irq_ptr),
495 (irq_ptr->sch_token) ? 1 : 0,
496 (irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 1 : 0,
497 css_general_characteristics.aif_tdd,
498 (irq_ptr->siga_flag.input) ? "R" : " ",
499 (irq_ptr->siga_flag.output) ? "W" : " ",
500 (irq_ptr->siga_flag.sync) ? "S" : " ",
501 (irq_ptr->siga_flag.sync_after_ai) ? "A" : " ",
502 (irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " ");
503 printk(KERN_INFO "%s", s);
504 }
505
506 int qdio_enable_async_operation(struct qdio_output_q *outq)
507 {
508 outq->aobs = kzalloc(sizeof(struct qaob *) * QDIO_MAX_BUFFERS_PER_Q,
509 GFP_ATOMIC);
510 if (!outq->aobs) {
511 outq->use_cq = 0;
512 return -ENOMEM;
513 }
514 outq->use_cq = 1;
515 return 0;
516 }
517
518 void qdio_disable_async_operation(struct qdio_output_q *q)
519 {
520 kfree(q->aobs);
521 q->aobs = NULL;
522 q->use_cq = 0;
523 }
524
525 int __init qdio_setup_init(void)
526 {
527 int rc;
528
529 qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
530 256, 0, NULL);
531 if (!qdio_q_cache)
532 return -ENOMEM;
533
534 qdio_aob_cache = kmem_cache_create("qdio_aob",
535 sizeof(struct qaob),
536 sizeof(struct qaob),
537 0,
538 NULL);
539 if (!qdio_aob_cache) {
540 rc = -ENOMEM;
541 goto free_qdio_q_cache;
542 }
543
544 /* Check for OSA/FCP thin interrupts (bit 67). */
545 DBF_EVENT("thinint:%1d",
546 (css_general_characteristics.aif_osa) ? 1 : 0);
547
548 /* Check for QEBSM support in general (bit 58). */
549 DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
550 rc = 0;
551 out:
552 return rc;
553 free_qdio_q_cache:
554 kmem_cache_destroy(qdio_q_cache);
555 goto out;
556 }
557
558 void qdio_setup_exit(void)
559 {
560 kmem_cache_destroy(qdio_aob_cache);
561 kmem_cache_destroy(qdio_q_cache);
562 }
Linux kernel - Deliverables
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