1 /*
2 * IEEE 1394 for Linux
3 *
4 * Copyright (C) 1999 Andreas E. Bombe
5 *
6 * This code is licensed under the GPL. See the file COPYING in the root
7 * directory of the kernel sources for details.
8 *
9 *
10 * Contributions:
11 *
12 * Christian Toegel <christian.toegel@gmx.at>
13 * unregister address space
14 *
15 * Manfred Weihs <weihs@ict.tuwien.ac.at>
16 * unregister address space
17 *
18 */
19
20 #include <linux/config.h>
21 #include <linux/slab.h>
22 #include <linux/list.h>
23 #include <linux/bitops.h>
24
25 #include "ieee1394.h"
26 #include "ieee1394_types.h"
27 #include "hosts.h"
28 #include "ieee1394_core.h"
29 #include "highlevel.h"
30 #include "nodemgr.h"
31
32
33 struct hl_host_info {
34 struct list_head list;
35 struct hpsb_host *host;
36 size_t size;
37 unsigned long key;
38 void *data;
39 };
40
41
42 static LIST_HEAD(hl_drivers);
43 static DECLARE_RWSEM(hl_drivers_sem);
44
45 static LIST_HEAD(hl_irqs);
46 static DEFINE_RWLOCK(hl_irqs_lock);
47
48 static DEFINE_RWLOCK(addr_space_lock);
49
50 /* addr_space list will have zero and max already included as bounds */
51 static struct hpsb_address_ops dummy_ops = { NULL, NULL, NULL, NULL };
52 static struct hpsb_address_serve dummy_zero_addr, dummy_max_addr;
53
54
55 static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl,
56 struct hpsb_host *host)
57 {
58 struct hl_host_info *hi = NULL;
59
60 if (!hl || !host)
61 return NULL;
62
63 read_lock(&hl->host_info_lock);
64 list_for_each_entry(hi, &hl->host_info_list, list) {
65 if (hi->host == host) {
66 read_unlock(&hl->host_info_lock);
67 return hi;
68 }
69 }
70 read_unlock(&hl->host_info_lock);
71
72 return NULL;
73 }
74
75
76 /* Returns a per host/driver data structure that was previously stored by
77 * hpsb_create_hostinfo. */
78 void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
79 {
80 struct hl_host_info *hi = hl_get_hostinfo(hl, host);
81
82 if (hi)
83 return hi->data;
84
85 return NULL;
86 }
87
88
89 /* If size is zero, then the return here is only valid for error checking */
90 void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
91 size_t data_size)
92 {
93 struct hl_host_info *hi;
94 void *data;
95 unsigned long flags;
96
97 hi = hl_get_hostinfo(hl, host);
98 if (hi) {
99 HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already exists",
100 hl->name);
101 return NULL;
102 }
103
104 hi = kmalloc(sizeof(*hi) + data_size, GFP_ATOMIC);
105 if (!hi)
106 return NULL;
107
108 memset(hi, 0, sizeof(*hi) + data_size);
109
110 if (data_size) {
111 data = hi->data = hi + 1;
112 hi->size = data_size;
113 } else
114 data = hi;
115
116 hi->host = host;
117
118 write_lock_irqsave(&hl->host_info_lock, flags);
119 list_add_tail(&hi->list, &hl->host_info_list);
120 write_unlock_irqrestore(&hl->host_info_lock, flags);
121
122 return data;
123 }
124
125
126 int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
127 void *data)
128 {
129 struct hl_host_info *hi;
130
131 hi = hl_get_hostinfo(hl, host);
132 if (hi) {
133 if (!hi->size && !hi->data) {
134 hi->data = data;
135 return 0;
136 } else
137 HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo already has data",
138 hl->name);
139 } else
140 HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists",
141 hl->name);
142
143 return -EINVAL;
144 }
145
146
147 void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
148 {
149 struct hl_host_info *hi;
150
151 hi = hl_get_hostinfo(hl, host);
152 if (hi) {
153 unsigned long flags;
154 write_lock_irqsave(&hl->host_info_lock, flags);
155 list_del(&hi->list);
156 write_unlock_irqrestore(&hl->host_info_lock, flags);
157 kfree(hi);
158 }
159
160 return;
161 }
162
163
164 void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, unsigned long key)
165 {
166 struct hl_host_info *hi;
167
168 hi = hl_get_hostinfo(hl, host);
169 if (hi)
170 hi->key = key;
171
172 return;
173 }
174
175
176 unsigned long hpsb_get_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host)
177 {
178 struct hl_host_info *hi;
179
180 hi = hl_get_hostinfo(hl, host);
181 if (hi)
182 return hi->key;
183
184 return 0;
185 }
186
187
188 void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key)
189 {
190 struct hl_host_info *hi;
191 void *data = NULL;
192
193 if (!hl)
194 return NULL;
195
196 read_lock(&hl->host_info_lock);
197 list_for_each_entry(hi, &hl->host_info_list, list) {
198 if (hi->key == key) {
199 data = hi->data;
200 break;
201 }
202 }
203 read_unlock(&hl->host_info_lock);
204
205 return data;
206 }
207
208
209 struct hpsb_host *hpsb_get_host_bykey(struct hpsb_highlevel *hl, unsigned long key)
210 {
211 struct hl_host_info *hi;
212 struct hpsb_host *host = NULL;
213
214 if (!hl)
215 return NULL;
216
217 read_lock(&hl->host_info_lock);
218 list_for_each_entry(hi, &hl->host_info_list, list) {
219 if (hi->key == key) {
220 host = hi->host;
221 break;
222 }
223 }
224 read_unlock(&hl->host_info_lock);
225
226 return host;
227 }
228
229 static int highlevel_for_each_host_reg(struct hpsb_host *host, void *__data)
230 {
231 struct hpsb_highlevel *hl = __data;
232
233 hl->add_host(host);
234
235 if (host->update_config_rom) {
236 if (hpsb_update_config_rom_image(host) < 0) {
237 HPSB_ERR("Failed to generate Configuration ROM image for host "
238 "%s-%d", hl->name, host->id);
239 }
240 }
241
242 return 0;
243 }
244
245 void hpsb_register_highlevel(struct hpsb_highlevel *hl)
246 {
247 INIT_LIST_HEAD(&hl->addr_list);
248 INIT_LIST_HEAD(&hl->host_info_list);
249
250 rwlock_init(&hl->host_info_lock);
251
252 down_write(&hl_drivers_sem);
253 list_add_tail(&hl->hl_list, &hl_drivers);
254 up_write(&hl_drivers_sem);
255
256 write_lock(&hl_irqs_lock);
257 list_add_tail(&hl->irq_list, &hl_irqs);
258 write_unlock(&hl_irqs_lock);
259
260 if (hl->add_host)
261 nodemgr_for_each_host(hl, highlevel_for_each_host_reg);
262
263 return;
264 }
265
266 static void __delete_addr(struct hpsb_address_serve *as)
267 {
268 list_del(&as->host_list);
269 list_del(&as->hl_list);
270 kfree(as);
271 }
272
273 static void __unregister_host(struct hpsb_highlevel *hl, struct hpsb_host *host, int update_cr)
274 {
275 unsigned long flags;
276 struct list_head *lh, *next;
277 struct hpsb_address_serve *as;
278
279 /* First, let the highlevel driver unreg */
280 if (hl->remove_host)
281 hl->remove_host(host);
282
283 /* Remove any addresses that are matched for this highlevel driver
284 * and this particular host. */
285 write_lock_irqsave(&addr_space_lock, flags);
286 list_for_each_safe (lh, next, &hl->addr_list) {
287 as = list_entry(lh, struct hpsb_address_serve, hl_list);
288
289 if (as->host == host)
290 __delete_addr(as);
291 }
292 write_unlock_irqrestore(&addr_space_lock, flags);
293
294 /* Now update the config-rom to reflect anything removed by the
295 * highlevel driver. */
296 if (update_cr && host->update_config_rom) {
297 if (hpsb_update_config_rom_image(host) < 0) {
298 HPSB_ERR("Failed to generate Configuration ROM image for host "
299 "%s-%d", hl->name, host->id);
300 }
301 }
302
303 /* And finally, remove all the host info associated between these
304 * two. */
305 hpsb_destroy_hostinfo(hl, host);
306 }
307
308 static int highlevel_for_each_host_unreg(struct hpsb_host *host, void *__data)
309 {
310 struct hpsb_highlevel *hl = __data;
311
312 __unregister_host(hl, host, 1);
313
314 return 0;
315 }
316
317 void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
318 {
319 write_lock(&hl_irqs_lock);
320 list_del(&hl->irq_list);
321 write_unlock(&hl_irqs_lock);
322
323 down_write(&hl_drivers_sem);
324 list_del(&hl->hl_list);
325 up_write(&hl_drivers_sem);
326
327 nodemgr_for_each_host(hl, highlevel_for_each_host_unreg);
328 }
329
330 u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
331 struct hpsb_host *host,
332 struct hpsb_address_ops *ops,
333 u64 size, u64 alignment,
334 u64 start, u64 end)
335 {
336 struct hpsb_address_serve *as, *a1, *a2;
337 struct list_head *entry;
338 u64 retval = ~0ULL;
339 unsigned long flags;
340 u64 align_mask = ~(alignment - 1);
341
342 if ((alignment & 3) || (alignment > 0x800000000000ULL) ||
343 ((hweight32(alignment >> 32) +
344 hweight32(alignment & 0xffffffff) != 1))) {
345 HPSB_ERR("%s called with invalid alignment: 0x%048llx",
346 __FUNCTION__, (unsigned long long)alignment);
347 return retval;
348 }
349
350 if (start == ~0ULL && end == ~0ULL) {
351 start = CSR1212_ALL_SPACE_BASE + 0xffff00000000ULL; /* ohci1394.c limit */
352 end = CSR1212_ALL_SPACE_END;
353 }
354
355 if (((start|end) & ~align_mask) || (start >= end) || (end > 0x1000000000000ULL)) {
356 HPSB_ERR("%s called with invalid addresses (start = %012Lx end = %012Lx)",
357 __FUNCTION__, (unsigned long long)start, (unsigned long long)end);
358 return retval;
359 }
360
361 as = (struct hpsb_address_serve *)
362 kmalloc(sizeof(struct hpsb_address_serve), GFP_KERNEL);
363 if (as == NULL) {
364 return retval;
365 }
366
367 INIT_LIST_HEAD(&as->host_list);
368 INIT_LIST_HEAD(&as->hl_list);
369 as->op = ops;
370 as->host = host;
371
372 write_lock_irqsave(&addr_space_lock, flags);
373
374 list_for_each(entry, &host->addr_space) {
375 u64 a1sa, a1ea;
376 u64 a2sa, a2ea;
377
378 a1 = list_entry(entry, struct hpsb_address_serve, host_list);
379 a2 = list_entry(entry->next, struct hpsb_address_serve, host_list);
380
381 a1sa = a1->start & align_mask;
382 a1ea = (a1->end + alignment -1) & align_mask;
383 a2sa = a2->start & align_mask;
384 a2ea = (a2->end + alignment -1) & align_mask;
385
386 if ((a2sa - a1ea >= size) && (a2sa - start >= size) && (a2sa > start)) {
387 as->start = max(start, a1ea);
388 as->end = as->start + size;
389 list_add(&as->host_list, entry);
390 list_add_tail(&as->hl_list, &hl->addr_list);
391 retval = as->start;
392 break;
393 }
394 }
395
396 write_unlock_irqrestore(&addr_space_lock, flags);
397
398 if (retval == ~0ULL) {
399 kfree(as);
400 }
401
402 return retval;
403 }
404
405 int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
406 struct hpsb_address_ops *ops, u64 start, u64 end)
407 {
408 struct hpsb_address_serve *as;
409 struct list_head *lh;
410 int retval = 0;
411 unsigned long flags;
412
413 if (((start|end) & 3) || (start >= end) || (end > 0x1000000000000ULL)) {
414 HPSB_ERR("%s called with invalid addresses", __FUNCTION__);
415 return 0;
416 }
417
418 as = (struct hpsb_address_serve *)
419 kmalloc(sizeof(struct hpsb_address_serve), GFP_KERNEL);
420 if (as == NULL) {
421 return 0;
422 }
423
424 INIT_LIST_HEAD(&as->host_list);
425 INIT_LIST_HEAD(&as->hl_list);
426 as->op = ops;
427 as->start = start;
428 as->end = end;
429 as->host = host;
430
431 write_lock_irqsave(&addr_space_lock, flags);
432
433 list_for_each(lh, &host->addr_space) {
434 struct hpsb_address_serve *as_this =
435 list_entry(lh, struct hpsb_address_serve, host_list);
436 struct hpsb_address_serve *as_next =
437 list_entry(lh->next, struct hpsb_address_serve, host_list);
438
439 if (as_this->end > as->start)
440 break;
441
442 if (as_next->start >= as->end) {
443 list_add(&as->host_list, lh);
444 list_add_tail(&as->hl_list, &hl->addr_list);
445 retval = 1;
446 break;
447 }
448 }
449 write_unlock_irqrestore(&addr_space_lock, flags);
450
451 if (retval == 0)
452 kfree(as);
453
454 return retval;
455 }
456
457 int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
458 u64 start)
459 {
460 int retval = 0;
461 struct hpsb_address_serve *as;
462 struct list_head *lh, *next;
463 unsigned long flags;
464
465 write_lock_irqsave(&addr_space_lock, flags);
466
467 list_for_each_safe (lh, next, &hl->addr_list) {
468 as = list_entry(lh, struct hpsb_address_serve, hl_list);
469 if (as->start == start && as->host == host) {
470 __delete_addr(as);
471 retval = 1;
472 break;
473 }
474 }
475
476 write_unlock_irqrestore(&addr_space_lock, flags);
477
478 return retval;
479 }
480
481 int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
482 unsigned int channel)
483 {
484 if (channel > 63) {
485 HPSB_ERR("%s called with invalid channel", __FUNCTION__);
486 return -EINVAL;
487 }
488
489 if (host->iso_listen_count[channel]++ == 0) {
490 return host->driver->devctl(host, ISO_LISTEN_CHANNEL, channel);
491 }
492
493 return 0;
494 }
495
496 void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
497 unsigned int channel)
498 {
499 if (channel > 63) {
500 HPSB_ERR("%s called with invalid channel", __FUNCTION__);
501 return;
502 }
503
504 if (--host->iso_listen_count[channel] == 0) {
505 host->driver->devctl(host, ISO_UNLISTEN_CHANNEL, channel);
506 }
507 }
508
509 static void init_hpsb_highlevel(struct hpsb_host *host)
510 {
511 INIT_LIST_HEAD(&dummy_zero_addr.host_list);
512 INIT_LIST_HEAD(&dummy_zero_addr.hl_list);
513 INIT_LIST_HEAD(&dummy_max_addr.host_list);
514 INIT_LIST_HEAD(&dummy_max_addr.hl_list);
515
516 dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops;
517
518 dummy_zero_addr.start = dummy_zero_addr.end = 0;
519 dummy_max_addr.start = dummy_max_addr.end = ((u64) 1) << 48;
520
521 list_add_tail(&dummy_zero_addr.host_list, &host->addr_space);
522 list_add_tail(&dummy_max_addr.host_list, &host->addr_space);
523 }
524
525 void highlevel_add_host(struct hpsb_host *host)
526 {
527 struct hpsb_highlevel *hl;
528
529 init_hpsb_highlevel(host);
530
531 down_read(&hl_drivers_sem);
532 list_for_each_entry(hl, &hl_drivers, hl_list) {
533 if (hl->add_host)
534 hl->add_host(host);
535 }
536 up_read(&hl_drivers_sem);
537 if (host->update_config_rom) {
538 if (hpsb_update_config_rom_image(host) < 0)
539 HPSB_ERR("Failed to generate Configuration ROM image for "
540 "host %s-%d", hl->name, host->id);
541 }
542 }
543
544 void highlevel_remove_host(struct hpsb_host *host)
545 {
546 struct hpsb_highlevel *hl;
547
548 down_read(&hl_drivers_sem);
549 list_for_each_entry(hl, &hl_drivers, hl_list)
550 __unregister_host(hl, host, 0);
551 up_read(&hl_drivers_sem);
552 }
553
554 void highlevel_host_reset(struct hpsb_host *host)
555 {
556 struct hpsb_highlevel *hl;
557
558 read_lock(&hl_irqs_lock);
559 list_for_each_entry(hl, &hl_irqs, irq_list) {
560 if (hl->host_reset)
561 hl->host_reset(host);
562 }
563 read_unlock(&hl_irqs_lock);
564 }
565
566 void highlevel_iso_receive(struct hpsb_host *host, void *data, size_t length)
567 {
568 struct hpsb_highlevel *hl;
569 int channel = (((quadlet_t *)data)[0] >> 8) & 0x3f;
570
571 read_lock(&hl_irqs_lock);
572 list_for_each_entry(hl, &hl_irqs, irq_list) {
573 if (hl->iso_receive)
574 hl->iso_receive(host, channel, data, length);
575 }
576 read_unlock(&hl_irqs_lock);
577 }
578
579 void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
580 void *data, size_t length)
581 {
582 struct hpsb_highlevel *hl;
583 int cts = ((quadlet_t *)data)[0] >> 4;
584
585 read_lock(&hl_irqs_lock);
586 list_for_each_entry(hl, &hl_irqs, irq_list) {
587 if (hl->fcp_request)
588 hl->fcp_request(host, nodeid, direction, cts, data,
589 length);
590 }
591 read_unlock(&hl_irqs_lock);
592 }
593
594 int highlevel_read(struct hpsb_host *host, int nodeid, void *data,
595 u64 addr, unsigned int length, u16 flags)
596 {
597 struct hpsb_address_serve *as;
598 unsigned int partlength;
599 int rcode = RCODE_ADDRESS_ERROR;
600
601 read_lock(&addr_space_lock);
602
603 list_for_each_entry(as, &host->addr_space, host_list) {
604 if (as->start > addr)
605 break;
606
607 if (as->end > addr) {
608 partlength = min(as->end - addr, (u64) length);
609
610 if (as->op->read) {
611 rcode = as->op->read(host, nodeid, data,
612 addr, partlength, flags);
613 } else {
614 rcode = RCODE_TYPE_ERROR;
615 }
616
617 data += partlength;
618 length -= partlength;
619 addr += partlength;
620
621 if ((rcode != RCODE_COMPLETE) || !length) {
622 break;
623 }
624 }
625 }
626
627 read_unlock(&addr_space_lock);
628
629 if (length && (rcode == RCODE_COMPLETE)) {
630 rcode = RCODE_ADDRESS_ERROR;
631 }
632
633 return rcode;
634 }
635
636 int highlevel_write(struct hpsb_host *host, int nodeid, int destid,
637 void *data, u64 addr, unsigned int length, u16 flags)
638 {
639 struct hpsb_address_serve *as;
640 unsigned int partlength;
641 int rcode = RCODE_ADDRESS_ERROR;
642
643 read_lock(&addr_space_lock);
644
645 list_for_each_entry(as, &host->addr_space, host_list) {
646 if (as->start > addr)
647 break;
648
649 if (as->end > addr) {
650 partlength = min(as->end - addr, (u64) length);
651
652 if (as->op->write) {
653 rcode = as->op->write(host, nodeid, destid,
654 data, addr, partlength, flags);
655 } else {
656 rcode = RCODE_TYPE_ERROR;
657 }
658
659 data += partlength;
660 length -= partlength;
661 addr += partlength;
662
663 if ((rcode != RCODE_COMPLETE) || !length) {
664 break;
665 }
666 }
667 }
668
669 read_unlock(&addr_space_lock);
670
671 if (length && (rcode == RCODE_COMPLETE)) {
672 rcode = RCODE_ADDRESS_ERROR;
673 }
674
675 return rcode;
676 }
677
678
679 int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
680 u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, u16 flags)
681 {
682 struct hpsb_address_serve *as;
683 int rcode = RCODE_ADDRESS_ERROR;
684
685 read_lock(&addr_space_lock);
686
687 list_for_each_entry(as, &host->addr_space, host_list) {
688 if (as->start > addr)
689 break;
690
691 if (as->end > addr) {
692 if (as->op->lock) {
693 rcode = as->op->lock(host, nodeid, store, addr,
694 data, arg, ext_tcode, flags);
695 } else {
696 rcode = RCODE_TYPE_ERROR;
697 }
698
699 break;
700 }
701 }
702
703 read_unlock(&addr_space_lock);
704
705 return rcode;
706 }
707
708 int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
709 u64 addr, octlet_t data, octlet_t arg, int ext_tcode, u16 flags)
710 {
711 struct hpsb_address_serve *as;
712 int rcode = RCODE_ADDRESS_ERROR;
713
714 read_lock(&addr_space_lock);
715
716 list_for_each_entry(as, &host->addr_space, host_list) {
717 if (as->start > addr)
718 break;
719
720 if (as->end > addr) {
721 if (as->op->lock64) {
722 rcode = as->op->lock64(host, nodeid, store,
723 addr, data, arg,
724 ext_tcode, flags);
725 } else {
726 rcode = RCODE_TYPE_ERROR;
727 }
728
729 break;
730 }
731 }
732
733 read_unlock(&addr_space_lock);
734
735 return rcode;
736 }
737
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