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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
13#include <asm/ebcdic.h>
14#include <asm/qdio.h>
15
16#include "cio.h"
17#include "css.h"
18#include "device.h"
19#include "ioasm.h"
20#include "chsc.h"
21#include "qdio.h"
22#include "qdio_debug.h"
23
24#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))
25
26static struct kmem_cache *qdio_q_cache;
27static struct kmem_cache *qdio_aob_cache;
28
29struct qaob *qdio_allocate_aob(void)
30{
31 return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
32}
33EXPORT_SYMBOL_GPL(qdio_allocate_aob);
34
35void qdio_release_aob(struct qaob *aob)
36{
37 kmem_cache_free(qdio_aob_cache, aob);
38}
39EXPORT_SYMBOL_GPL(qdio_release_aob);
40
41
42
43
44
45
46void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count)
47{
48 int pos;
49
50 for (pos = 0; pos < count; pos += QBUFF_PER_PAGE)
51 free_page((unsigned long) buf[pos]);
52}
53EXPORT_SYMBOL_GPL(qdio_free_buffers);
54
55
56
57
58
59
60int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count)
61{
62 int pos;
63
64 for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) {
65 buf[pos] = (void *) get_zeroed_page(GFP_KERNEL);
66 if (!buf[pos]) {
67 qdio_free_buffers(buf, count);
68 return -ENOMEM;
69 }
70 }
71 for (pos = 0; pos < count; pos++)
72 if (pos % QBUFF_PER_PAGE)
73 buf[pos] = buf[pos - 1] + 1;
74 return 0;
75}
76EXPORT_SYMBOL_GPL(qdio_alloc_buffers);
77
78
79
80
81
82
83void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count)
84{
85 int pos;
86
87 for (pos = 0; pos < count; pos++)
88 memset(buf[pos], 0, sizeof(struct qdio_buffer));
89}
90EXPORT_SYMBOL_GPL(qdio_reset_buffers);
91
92static void __qdio_free_queues(struct qdio_q **queues, unsigned int count)
93{
94 struct qdio_q *q;
95 unsigned int i;
96
97 for (i = 0; i < count; i++) {
98 q = queues[i];
99 free_page((unsigned long) q->slib);
100 kmem_cache_free(qdio_q_cache, q);
101 }
102}
103
104void qdio_free_queues(struct qdio_irq *irq_ptr)
105{
106 __qdio_free_queues(irq_ptr->input_qs, irq_ptr->max_input_qs);
107 irq_ptr->max_input_qs = 0;
108
109 __qdio_free_queues(irq_ptr->output_qs, irq_ptr->max_output_qs);
110 irq_ptr->max_output_qs = 0;
111}
112
113static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
114{
115 struct qdio_q *q;
116 int i;
117
118 for (i = 0; i < nr_queues; i++) {
119 q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
120 if (!q) {
121 __qdio_free_queues(irq_ptr_qs, i);
122 return -ENOMEM;
123 }
124
125 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
126 if (!q->slib) {
127 kmem_cache_free(qdio_q_cache, q);
128 __qdio_free_queues(irq_ptr_qs, i);
129 return -ENOMEM;
130 }
131 irq_ptr_qs[i] = q;
132 }
133 return 0;
134}
135
136int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
137{
138 int rc;
139
140 rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
141 if (rc)
142 return rc;
143
144 rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
145 if (rc) {
146 __qdio_free_queues(irq_ptr->input_qs, nr_input_qs);
147 return rc;
148 }
149
150 irq_ptr->max_input_qs = nr_input_qs;
151 irq_ptr->max_output_qs = nr_output_qs;
152 return 0;
153}
154
155static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
156 qdio_handler_t *handler, int i)
157{
158 struct slib *slib = q->slib;
159
160
161 memset(q, 0, sizeof(*q));
162 memset(slib, 0, PAGE_SIZE);
163 q->slib = slib;
164 q->irq_ptr = irq_ptr;
165 q->mask = 1 << (31 - i);
166 q->nr = i;
167 q->handler = handler;
168}
169
170static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
171 struct qdio_buffer **sbals_array, int i)
172{
173 struct qdio_q *prev;
174 int j;
175
176 DBF_HEX(&q, sizeof(void *));
177 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);
178
179
180 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
181 q->sbal[j] = *sbals_array++;
182
183
184 if (i > 0) {
185 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
186 : irq_ptr->output_qs[i - 1];
187 prev->slib->nsliba = (unsigned long)q->slib;
188 }
189
190 q->slib->sla = (unsigned long)q->sl;
191 q->slib->slsba = (unsigned long)&q->slsb.val[0];
192
193
194 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
195 q->sl->element[j].sbal = virt_to_phys(q->sbal[j]);
196}
197
198static void setup_queues(struct qdio_irq *irq_ptr,
199 struct qdio_initialize *qdio_init)
200{
201 struct qdio_q *q;
202 int i;
203
204 for_each_input_queue(irq_ptr, q, i) {
205 DBF_EVENT("inq:%1d", i);
206 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
207
208 q->is_input_q = 1;
209
210 setup_storage_lists(q, irq_ptr,
211 qdio_init->input_sbal_addr_array[i], i);
212 }
213
214 for_each_output_queue(irq_ptr, q, i) {
215 DBF_EVENT("outq:%1d", i);
216 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
217
218 q->is_input_q = 0;
219 setup_storage_lists(q, irq_ptr,
220 qdio_init->output_sbal_addr_array[i], i);
221 }
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 irq_ptr->qdioac1 = 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
305static void qdio_fill_qdr_desc(struct qdesfmt0 *desc, struct qdio_q *queue)
306{
307 desc->sliba = virt_to_phys(queue->slib);
308 desc->sla = virt_to_phys(queue->sl);
309 desc->slsba = virt_to_phys(&queue->slsb);
310
311 desc->akey = PAGE_DEFAULT_KEY >> 4;
312 desc->bkey = PAGE_DEFAULT_KEY >> 4;
313 desc->ckey = PAGE_DEFAULT_KEY >> 4;
314 desc->dkey = PAGE_DEFAULT_KEY >> 4;
315}
316
317static void setup_qdr(struct qdio_irq *irq_ptr,
318 struct qdio_initialize *qdio_init)
319{
320 struct qdesfmt0 *desc = &irq_ptr->qdr->qdf0[0];
321 int i;
322
323 memset(irq_ptr->qdr, 0, sizeof(struct qdr));
324
325 irq_ptr->qdr->qfmt = qdio_init->q_format;
326 irq_ptr->qdr->ac = qdio_init->qdr_ac;
327 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
328 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
329 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4;
330 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
331 irq_ptr->qdr->qiba = virt_to_phys(&irq_ptr->qib);
332 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
333
334 for (i = 0; i < qdio_init->no_input_qs; i++)
335 qdio_fill_qdr_desc(desc++, irq_ptr->input_qs[i]);
336
337 for (i = 0; i < qdio_init->no_output_qs; i++)
338 qdio_fill_qdr_desc(desc++, irq_ptr->output_qs[i]);
339}
340
341static void setup_qib(struct qdio_irq *irq_ptr,
342 struct qdio_initialize *init_data)
343{
344 memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
345
346 irq_ptr->qib.qfmt = init_data->q_format;
347 irq_ptr->qib.pfmt = init_data->qib_param_field_format;
348
349 irq_ptr->qib.rflags = init_data->qib_rflags;
350 if (css_general_characteristics.qebsm)
351 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
352
353 if (init_data->no_input_qs)
354 irq_ptr->qib.isliba =
355 (unsigned long)(irq_ptr->input_qs[0]->slib);
356 if (init_data->no_output_qs)
357 irq_ptr->qib.osliba =
358 (unsigned long)(irq_ptr->output_qs[0]->slib);
359 memcpy(irq_ptr->qib.ebcnam, dev_name(&irq_ptr->cdev->dev), 8);
360 ASCEBC(irq_ptr->qib.ebcnam, 8);
361
362 if (init_data->qib_param_field)
363 memcpy(irq_ptr->qib.parm, init_data->qib_param_field,
364 sizeof(irq_ptr->qib.parm));
365}
366
367int qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data)
368{
369 struct ccw_device *cdev = irq_ptr->cdev;
370 struct ciw *ciw;
371
372 irq_ptr->qdioac1 = 0;
373 memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
374 memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
375 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
376
377 irq_ptr->debugfs_dev = NULL;
378 irq_ptr->sch_token = irq_ptr->perf_stat_enabled = 0;
379 irq_ptr->state = QDIO_IRQ_STATE_INACTIVE;
380
381 irq_ptr->int_parm = init_data->int_parm;
382 irq_ptr->nr_input_qs = init_data->no_input_qs;
383 irq_ptr->nr_output_qs = init_data->no_output_qs;
384 ccw_device_get_schid(cdev, &irq_ptr->schid);
385 setup_queues(irq_ptr, init_data);
386
387 irq_ptr->irq_poll = init_data->irq_poll;
388 set_bit(QDIO_IRQ_DISABLED, &irq_ptr->poll_state);
389
390 setup_qib(irq_ptr, init_data);
391
392
393 setup_qdr(irq_ptr, init_data);
394
395
396
397
398 spin_lock_irq(get_ccwdev_lock(cdev));
399 irq_ptr->orig_handler = cdev->handler;
400 cdev->handler = qdio_int_handler;
401 spin_unlock_irq(get_ccwdev_lock(cdev));
402
403
404 ciw = ccw_device_get_ciw(cdev, CIW_TYPE_EQUEUE);
405 if (!ciw) {
406 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
407 return -EINVAL;
408 }
409 irq_ptr->equeue = *ciw;
410
411 ciw = ccw_device_get_ciw(cdev, CIW_TYPE_AQUEUE);
412 if (!ciw) {
413 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
414 return -EINVAL;
415 }
416 irq_ptr->aqueue = *ciw;
417
418 return 0;
419}
420
421void qdio_shutdown_irq(struct qdio_irq *irq)
422{
423 struct ccw_device *cdev = irq->cdev;
424
425
426 spin_lock_irq(get_ccwdev_lock(cdev));
427 cdev->handler = irq->orig_handler;
428 cdev->private->intparm = 0;
429 spin_unlock_irq(get_ccwdev_lock(cdev));
430}
431
432void qdio_print_subchannel_info(struct qdio_irq *irq_ptr)
433{
434 dev_info(&irq_ptr->cdev->dev,
435 "qdio: %s on SC %x using AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s\n",
436 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" :
437 ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"),
438 irq_ptr->schid.sch_no,
439 is_thinint_irq(irq_ptr),
440 (irq_ptr->sch_token) ? 1 : 0,
441 pci_out_supported(irq_ptr) ? 1 : 0,
442 css_general_characteristics.aif_tdd,
443 qdio_need_siga_in(irq_ptr) ? "R" : " ",
444 qdio_need_siga_out(irq_ptr) ? "W" : " ",
445 qdio_need_siga_sync(irq_ptr) ? "S" : " ");
446}
447
448int __init qdio_setup_init(void)
449{
450 int rc;
451
452 qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
453 256, 0, NULL);
454 if (!qdio_q_cache)
455 return -ENOMEM;
456
457 qdio_aob_cache = kmem_cache_create("qdio_aob",
458 sizeof(struct qaob),
459 sizeof(struct qaob),
460 0,
461 NULL);
462 if (!qdio_aob_cache) {
463 rc = -ENOMEM;
464 goto free_qdio_q_cache;
465 }
466
467
468 DBF_EVENT("thinint:%1d",
469 (css_general_characteristics.aif_osa) ? 1 : 0);
470
471
472 DBF_EVENT("cssQEBSM:%1d", css_general_characteristics.qebsm);
473 rc = 0;
474out:
475 return rc;
476free_qdio_q_cache:
477 kmem_cache_destroy(qdio_q_cache);
478 goto out;
479}
480
481void qdio_setup_exit(void)
482{
483 kmem_cache_destroy(qdio_aob_cache);
484 kmem_cache_destroy(qdio_q_cache);
485}
486
