2 * qdio queue initialization
4 * Copyright IBM Corp. 2008
5 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
7 #include <linux/kernel.h>
8 #include <linux/slab.h>
9 #include <linux/export.h>
18 #include "qdio_debug.h"
20 #define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))
22 static struct kmem_cache *qdio_q_cache;
23 static struct kmem_cache *qdio_aob_cache;
25 struct qaob *qdio_allocate_aob(void)
27 return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
29 EXPORT_SYMBOL_GPL(qdio_allocate_aob);
31 void qdio_release_aob(struct qaob *aob)
33 kmem_cache_free(qdio_aob_cache, aob);
35 EXPORT_SYMBOL_GPL(qdio_release_aob);
38 * qdio_free_buffers() - free qdio buffers
39 * @buf: array of pointers to qdio buffers
40 * @count: number of qdio buffers to free
42 void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count)
46 for (pos = 0; pos < count; pos += QBUFF_PER_PAGE)
47 free_page((unsigned long) buf[pos]);
49 EXPORT_SYMBOL_GPL(qdio_free_buffers);
52 * qdio_alloc_buffers() - allocate qdio buffers
53 * @buf: array of pointers to qdio buffers
54 * @count: number of qdio buffers to allocate
56 int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count)
60 for (pos = 0; pos < count; pos += QBUFF_PER_PAGE) {
61 buf[pos] = (void *) get_zeroed_page(GFP_KERNEL);
63 qdio_free_buffers(buf, count);
67 for (pos = 0; pos < count; pos++)
68 if (pos % QBUFF_PER_PAGE)
69 buf[pos] = buf[pos - 1] + 1;
72 EXPORT_SYMBOL_GPL(qdio_alloc_buffers);
75 * qdio_reset_buffers() - reset qdio buffers
76 * @buf: array of pointers to qdio buffers
77 * @count: number of qdio buffers that will be zeroed
79 void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count)
83 for (pos = 0; pos < count; pos++)
84 memset(buf[pos], 0, sizeof(struct qdio_buffer));
86 EXPORT_SYMBOL_GPL(qdio_reset_buffers);
89 * qebsm is only available under 64bit but the adapter sets the feature
90 * flag anyway, so we manually override it.
92 static inline int qebsm_possible(void)
94 return css_general_characteristics.qebsm;
98 * qib_param_field: pointer to 128 bytes or NULL, if no param field
99 * nr_input_qs: pointer to nr_queues*128 words of data or NULL
101 static 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)
113 irq_ptr->qib.pfmt = qib_param_field_format;
115 memcpy(irq_ptr->qib.parm, qib_param_field,
116 QDIO_MAX_BUFFERS_PER_Q);
118 if (!input_slib_elements)
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];
127 if (!output_slib_elements)
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];
137 static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues)
142 for (i = 0; i < nr_queues; i++) {
143 q = kmem_cache_zalloc(qdio_q_cache, GFP_KERNEL);
147 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
149 kmem_cache_free(qdio_q_cache, q);
153 INIT_LIST_HEAD(&q->entry);
158 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs)
162 rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs);
165 rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs);
169 static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr,
170 qdio_handler_t *handler, int i)
172 struct slib *slib = q->slib;
174 /* queue must be cleared for qdio_establish */
175 memset(q, 0, sizeof(*q));
176 memset(slib, 0, PAGE_SIZE);
178 q->irq_ptr = irq_ptr;
179 q->mask = 1 << (31 - i);
181 q->handler = handler;
182 INIT_LIST_HEAD(&q->entry);
185 static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr,
186 void **sbals_array, int i)
191 DBF_HEX(&q, sizeof(void *));
192 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2);
195 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
196 q->sbal[j] = *sbals_array++;
200 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1]
201 : irq_ptr->output_qs[i - 1];
202 prev->slib->nsliba = (unsigned long)q->slib;
205 q->slib->sla = (unsigned long)q->sl;
206 q->slib->slsba = (unsigned long)&q->slsb.val[0];
209 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
210 q->sl->element[j].sbal = (unsigned long)q->sbal[j];
213 static void setup_queues(struct qdio_irq *irq_ptr,
214 struct qdio_initialize *qdio_init)
217 void **input_sbal_array = qdio_init->input_sbal_addr_array;
218 void **output_sbal_array = qdio_init->output_sbal_addr_array;
219 struct qdio_outbuf_state *output_sbal_state_array =
220 qdio_init->output_sbal_state_array;
223 for_each_input_queue(irq_ptr, q, i) {
224 DBF_EVENT("inq:%1d", i);
225 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
228 q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ?
229 qdio_init->queue_start_poll_array[i] : NULL;
231 setup_storage_lists(q, irq_ptr, input_sbal_array, i);
232 input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
234 if (is_thinint_irq(irq_ptr)) {
235 tasklet_init(&q->tasklet, tiqdio_inbound_processing,
238 tasklet_init(&q->tasklet, qdio_inbound_processing,
243 for_each_output_queue(irq_ptr, q, i) {
244 DBF_EVENT("outq:%1d", i);
245 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i);
247 q->u.out.sbal_state = output_sbal_state_array;
248 output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q;
251 q->u.out.scan_threshold = qdio_init->scan_threshold;
252 setup_storage_lists(q, irq_ptr, output_sbal_array, i);
253 output_sbal_array += QDIO_MAX_BUFFERS_PER_Q;
255 tasklet_init(&q->tasklet, qdio_outbound_processing,
257 setup_timer(&q->u.out.timer, (void(*)(unsigned long))
258 &qdio_outbound_timer, (unsigned long)q);
262 static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac)
264 if (qdioac & AC1_SIGA_INPUT_NEEDED)
265 irq_ptr->siga_flag.input = 1;
266 if (qdioac & AC1_SIGA_OUTPUT_NEEDED)
267 irq_ptr->siga_flag.output = 1;
268 if (qdioac & AC1_SIGA_SYNC_NEEDED)
269 irq_ptr->siga_flag.sync = 1;
270 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT))
271 irq_ptr->siga_flag.sync_after_ai = 1;
272 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI))
273 irq_ptr->siga_flag.sync_out_after_pci = 1;
276 static void check_and_setup_qebsm(struct qdio_irq *irq_ptr,
277 unsigned char qdioac, unsigned long token)
279 if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM))
281 if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) ||
282 (!(qdioac & AC1_SC_QEBSM_ENABLED)))
285 irq_ptr->sch_token = token;
288 DBF_EVENT("%8lx", irq_ptr->sch_token);
292 irq_ptr->sch_token = 0;
293 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
298 * If there is a qdio_irq we use the chsc_page and store the information
299 * in the qdio_irq, otherwise we copy it to the specified structure.
301 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
302 struct subchannel_id *schid,
303 struct qdio_ssqd_desc *data)
305 struct chsc_ssqd_area *ssqd;
308 DBF_EVENT("getssqd:%4x", schid->sch_no);
310 ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
314 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
317 rc = chsc_ssqd(*schid, ssqd);
321 if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
322 !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
323 (ssqd->qdio_ssqd.sch != schid->sch_no))
327 memcpy(data, &ssqd->qdio_ssqd, sizeof(*data));
331 free_page((unsigned long)ssqd);
336 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
338 unsigned char qdioac;
341 rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc);
343 DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no);
344 DBF_ERROR("rc:%x", rc);
345 /* all flags set, worst case */
346 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED |
347 AC1_SIGA_SYNC_NEEDED;
349 qdioac = irq_ptr->ssqd_desc.qdioac1;
351 check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token);
352 process_ac_flags(irq_ptr, qdioac);
353 DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2);
354 DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac);
357 void qdio_release_memory(struct qdio_irq *irq_ptr)
363 * Must check queue array manually since irq_ptr->nr_input_queues /
364 * irq_ptr->nr_input_queues may not yet be set.
366 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
367 q = irq_ptr->input_qs[i];
369 free_page((unsigned long) q->slib);
370 kmem_cache_free(qdio_q_cache, q);
373 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
374 q = irq_ptr->output_qs[i];
376 if (q->u.out.use_cq) {
379 for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) {
380 struct qaob *aob = q->u.out.aobs[n];
382 qdio_release_aob(aob);
383 q->u.out.aobs[n] = NULL;
387 qdio_disable_async_operation(&q->u.out);
389 free_page((unsigned long) q->slib);
390 kmem_cache_free(qdio_q_cache, q);
393 free_page((unsigned long) irq_ptr->qdr);
394 free_page(irq_ptr->chsc_page);
395 free_page((unsigned long) irq_ptr);
398 static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr,
399 struct qdio_q **irq_ptr_qs,
402 irq_ptr->qdr->qdf0[i + nr].sliba =
403 (unsigned long)irq_ptr_qs[i]->slib;
405 irq_ptr->qdr->qdf0[i + nr].sla =
406 (unsigned long)irq_ptr_qs[i]->sl;
408 irq_ptr->qdr->qdf0[i + nr].slsba =
409 (unsigned long)&irq_ptr_qs[i]->slsb.val[0];
411 irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4;
412 irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4;
413 irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4;
414 irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4;
417 static void setup_qdr(struct qdio_irq *irq_ptr,
418 struct qdio_initialize *qdio_init)
422 irq_ptr->qdr->qfmt = qdio_init->q_format;
423 irq_ptr->qdr->ac = qdio_init->qdr_ac;
424 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs;
425 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs;
426 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */
427 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4;
428 irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib;
429 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4;
431 for (i = 0; i < qdio_init->no_input_qs; i++)
432 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0);
434 for (i = 0; i < qdio_init->no_output_qs; i++)
435 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i,
436 qdio_init->no_input_qs);
439 static void setup_qib(struct qdio_irq *irq_ptr,
440 struct qdio_initialize *init_data)
442 if (qebsm_possible())
443 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
445 irq_ptr->qib.rflags |= init_data->qib_rflags;
447 irq_ptr->qib.qfmt = init_data->q_format;
448 if (init_data->no_input_qs)
449 irq_ptr->qib.isliba =
450 (unsigned long)(irq_ptr->input_qs[0]->slib);
451 if (init_data->no_output_qs)
452 irq_ptr->qib.osliba =
453 (unsigned long)(irq_ptr->output_qs[0]->slib);
454 memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8);
457 int qdio_setup_irq(struct qdio_initialize *init_data)
460 struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data;
462 memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib));
463 memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag));
464 memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw));
465 memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc));
466 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat));
468 irq_ptr->debugfs_dev = irq_ptr->debugfs_perf = NULL;
469 irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0;
471 /* wipes qib.ac, required by ar7063 */
472 memset(irq_ptr->qdr, 0, sizeof(struct qdr));
474 irq_ptr->int_parm = init_data->int_parm;
475 irq_ptr->nr_input_qs = init_data->no_input_qs;
476 irq_ptr->nr_output_qs = init_data->no_output_qs;
477 irq_ptr->cdev = init_data->cdev;
478 ccw_device_get_schid(irq_ptr->cdev, &irq_ptr->schid);
479 setup_queues(irq_ptr, init_data);
481 setup_qib(irq_ptr, init_data);
482 set_impl_params(irq_ptr, init_data->qib_param_field_format,
483 init_data->qib_param_field,
484 init_data->input_slib_elements,
485 init_data->output_slib_elements);
487 /* fill input and output descriptors */
488 setup_qdr(irq_ptr, init_data);
490 /* qdr, qib, sls, slsbs, slibs, sbales are filled now */
492 /* get qdio commands */
493 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
495 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no);
498 irq_ptr->equeue = *ciw;
500 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
502 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no);
505 irq_ptr->aqueue = *ciw;
507 /* set new interrupt handler */
508 irq_ptr->orig_handler = init_data->cdev->handler;
509 init_data->cdev->handler = qdio_int_handler;
513 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
514 struct ccw_device *cdev)
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 (irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 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);
536 int qdio_enable_async_operation(struct qdio_output_q *outq)
538 outq->aobs = kzalloc(sizeof(struct qaob *) * QDIO_MAX_BUFFERS_PER_Q,
548 void qdio_disable_async_operation(struct qdio_output_q *q)
555 int __init qdio_setup_init(void)
559 qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
564 qdio_aob_cache = kmem_cache_create("qdio_aob",
569 if (!qdio_aob_cache) {
571 goto free_qdio_q_cache;
574 /* Check for OSA/FCP thin interrupts (bit 67). */
575 DBF_EVENT("thinint:%1d",
576 (css_general_characteristics.aif_osa) ? 1 : 0);
578 /* Check for QEBSM support in general (bit 58). */
579 DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0);
584 kmem_cache_destroy(qdio_q_cache);
588 void qdio_setup_exit(void)
590 kmem_cache_destroy(qdio_aob_cache);
591 kmem_cache_destroy(qdio_q_cache);