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165dcd6695609142a93a615296c8188d06b1e642
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ieee1394 / highlevel.c
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 = kzalloc(sizeof(*hi) + data_size, GFP_ATOMIC);
105 if (!hi)
106 return NULL;
107
108 if (data_size) {
109 data = hi->data = hi + 1;
110 hi->size = data_size;
111 } else
112 data = hi;
113
114 hi->host = host;
115
116 write_lock_irqsave(&hl->host_info_lock, flags);
117 list_add_tail(&hi->list, &hl->host_info_list);
118 write_unlock_irqrestore(&hl->host_info_lock, flags);
119
120 return data;
121 }
122
123
124 int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
125 void *data)
126 {
127 struct hl_host_info *hi;
128
129 hi = hl_get_hostinfo(hl, host);
130 if (hi) {
131 if (!hi->size && !hi->data) {
132 hi->data = data;
133 return 0;
134 } else
135 HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo already has data",
136 hl->name);
137 } else
138 HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists",
139 hl->name);
140
141 return -EINVAL;
142 }
143
144
145 void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
146 {
147 struct hl_host_info *hi;
148
149 hi = hl_get_hostinfo(hl, host);
150 if (hi) {
151 unsigned long flags;
152 write_lock_irqsave(&hl->host_info_lock, flags);
153 list_del(&hi->list);
154 write_unlock_irqrestore(&hl->host_info_lock, flags);
155 kfree(hi);
156 }
157
158 return;
159 }
160
161
162 void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, unsigned long key)
163 {
164 struct hl_host_info *hi;
165
166 hi = hl_get_hostinfo(hl, host);
167 if (hi)
168 hi->key = key;
169
170 return;
171 }
172
173
174 void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key)
175 {
176 struct hl_host_info *hi;
177 void *data = NULL;
178
179 if (!hl)
180 return NULL;
181
182 read_lock(&hl->host_info_lock);
183 list_for_each_entry(hi, &hl->host_info_list, list) {
184 if (hi->key == key) {
185 data = hi->data;
186 break;
187 }
188 }
189 read_unlock(&hl->host_info_lock);
190
191 return data;
192 }
193
194
195 static int highlevel_for_each_host_reg(struct hpsb_host *host, void *__data)
196 {
197 struct hpsb_highlevel *hl = __data;
198
199 hl->add_host(host);
200
201 if (host->update_config_rom) {
202 if (hpsb_update_config_rom_image(host) < 0) {
203 HPSB_ERR("Failed to generate Configuration ROM image for host "
204 "%s-%d", hl->name, host->id);
205 }
206 }
207
208 return 0;
209 }
210
211 void hpsb_register_highlevel(struct hpsb_highlevel *hl)
212 {
213 INIT_LIST_HEAD(&hl->addr_list);
214 INIT_LIST_HEAD(&hl->host_info_list);
215
216 rwlock_init(&hl->host_info_lock);
217
218 down_write(&hl_drivers_sem);
219 list_add_tail(&hl->hl_list, &hl_drivers);
220 up_write(&hl_drivers_sem);
221
222 write_lock(&hl_irqs_lock);
223 list_add_tail(&hl->irq_list, &hl_irqs);
224 write_unlock(&hl_irqs_lock);
225
226 if (hl->add_host)
227 nodemgr_for_each_host(hl, highlevel_for_each_host_reg);
228
229 return;
230 }
231
232 static void __delete_addr(struct hpsb_address_serve *as)
233 {
234 list_del(&as->host_list);
235 list_del(&as->hl_list);
236 kfree(as);
237 }
238
239 static void __unregister_host(struct hpsb_highlevel *hl, struct hpsb_host *host, int update_cr)
240 {
241 unsigned long flags;
242 struct list_head *lh, *next;
243 struct hpsb_address_serve *as;
244
245 /* First, let the highlevel driver unreg */
246 if (hl->remove_host)
247 hl->remove_host(host);
248
249 /* Remove any addresses that are matched for this highlevel driver
250 * and this particular host. */
251 write_lock_irqsave(&addr_space_lock, flags);
252 list_for_each_safe (lh, next, &hl->addr_list) {
253 as = list_entry(lh, struct hpsb_address_serve, hl_list);
254
255 if (as->host == host)
256 __delete_addr(as);
257 }
258 write_unlock_irqrestore(&addr_space_lock, flags);
259
260 /* Now update the config-rom to reflect anything removed by the
261 * highlevel driver. */
262 if (update_cr && host->update_config_rom) {
263 if (hpsb_update_config_rom_image(host) < 0) {
264 HPSB_ERR("Failed to generate Configuration ROM image for host "
265 "%s-%d", hl->name, host->id);
266 }
267 }
268
269 /* And finally, remove all the host info associated between these
270 * two. */
271 hpsb_destroy_hostinfo(hl, host);
272 }
273
274 static int highlevel_for_each_host_unreg(struct hpsb_host *host, void *__data)
275 {
276 struct hpsb_highlevel *hl = __data;
277
278 __unregister_host(hl, host, 1);
279
280 return 0;
281 }
282
283 void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
284 {
285 write_lock(&hl_irqs_lock);
286 list_del(&hl->irq_list);
287 write_unlock(&hl_irqs_lock);
288
289 down_write(&hl_drivers_sem);
290 list_del(&hl->hl_list);
291 up_write(&hl_drivers_sem);
292
293 nodemgr_for_each_host(hl, highlevel_for_each_host_unreg);
294 }
295
296 u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
297 struct hpsb_host *host,
298 struct hpsb_address_ops *ops,
299 u64 size, u64 alignment,
300 u64 start, u64 end)
301 {
302 struct hpsb_address_serve *as, *a1, *a2;
303 struct list_head *entry;
304 u64 retval = CSR1212_INVALID_ADDR_SPACE;
305 unsigned long flags;
306 u64 align_mask = ~(alignment - 1);
307
308 if ((alignment & 3) || (alignment > 0x800000000000ULL) ||
309 (hweight64(alignment) != 1)) {
310 HPSB_ERR("%s called with invalid alignment: 0x%048llx",
311 __FUNCTION__, (unsigned long long)alignment);
312 return retval;
313 }
314
315 /* default range,
316 * avoids controller's posted write area (see OHCI 1.1 clause 1.5) */
317 if (start == CSR1212_INVALID_ADDR_SPACE &&
318 end == CSR1212_INVALID_ADDR_SPACE) {
319 start = host->middle_addr_space;
320 end = CSR1212_ALL_SPACE_END;
321 }
322
323 if (((start|end) & ~align_mask) || (start >= end) || (end > 0x1000000000000ULL)) {
324 HPSB_ERR("%s called with invalid addresses (start = %012Lx end = %012Lx)",
325 __FUNCTION__, (unsigned long long)start, (unsigned long long)end);
326 return retval;
327 }
328
329 as = kmalloc(sizeof(*as), GFP_KERNEL);
330 if (!as)
331 return retval;
332
333 INIT_LIST_HEAD(&as->host_list);
334 INIT_LIST_HEAD(&as->hl_list);
335 as->op = ops;
336 as->host = host;
337
338 write_lock_irqsave(&addr_space_lock, flags);
339
340 list_for_each(entry, &host->addr_space) {
341 u64 a1sa, a1ea;
342 u64 a2sa, a2ea;
343
344 a1 = list_entry(entry, struct hpsb_address_serve, host_list);
345 a2 = list_entry(entry->next, struct hpsb_address_serve, host_list);
346
347 a1sa = a1->start & align_mask;
348 a1ea = (a1->end + alignment -1) & align_mask;
349 a2sa = a2->start & align_mask;
350 a2ea = (a2->end + alignment -1) & align_mask;
351
352 if ((a2sa - a1ea >= size) && (a2sa - start >= size) && (a2sa > start)) {
353 as->start = max(start, a1ea);
354 as->end = as->start + size;
355 list_add(&as->host_list, entry);
356 list_add_tail(&as->hl_list, &hl->addr_list);
357 retval = as->start;
358 break;
359 }
360 }
361
362 write_unlock_irqrestore(&addr_space_lock, flags);
363
364 if (retval == CSR1212_INVALID_ADDR_SPACE) {
365 kfree(as);
366 }
367
368 return retval;
369 }
370
371 int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
372 struct hpsb_address_ops *ops, u64 start, u64 end)
373 {
374 struct hpsb_address_serve *as;
375 struct list_head *lh;
376 int retval = 0;
377 unsigned long flags;
378
379 if (((start|end) & 3) || (start >= end) || (end > 0x1000000000000ULL)) {
380 HPSB_ERR("%s called with invalid addresses", __FUNCTION__);
381 return 0;
382 }
383
384 as = kmalloc(sizeof(*as), GFP_ATOMIC);
385 if (!as)
386 return 0;
387
388 INIT_LIST_HEAD(&as->host_list);
389 INIT_LIST_HEAD(&as->hl_list);
390 as->op = ops;
391 as->start = start;
392 as->end = end;
393 as->host = host;
394
395 write_lock_irqsave(&addr_space_lock, flags);
396
397 list_for_each(lh, &host->addr_space) {
398 struct hpsb_address_serve *as_this =
399 list_entry(lh, struct hpsb_address_serve, host_list);
400 struct hpsb_address_serve *as_next =
401 list_entry(lh->next, struct hpsb_address_serve, host_list);
402
403 if (as_this->end > as->start)
404 break;
405
406 if (as_next->start >= as->end) {
407 list_add(&as->host_list, lh);
408 list_add_tail(&as->hl_list, &hl->addr_list);
409 retval = 1;
410 break;
411 }
412 }
413 write_unlock_irqrestore(&addr_space_lock, flags);
414
415 if (retval == 0)
416 kfree(as);
417
418 return retval;
419 }
420
421 int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
422 u64 start)
423 {
424 int retval = 0;
425 struct hpsb_address_serve *as;
426 struct list_head *lh, *next;
427 unsigned long flags;
428
429 write_lock_irqsave(&addr_space_lock, flags);
430
431 list_for_each_safe (lh, next, &hl->addr_list) {
432 as = list_entry(lh, struct hpsb_address_serve, hl_list);
433 if (as->start == start && as->host == host) {
434 __delete_addr(as);
435 retval = 1;
436 break;
437 }
438 }
439
440 write_unlock_irqrestore(&addr_space_lock, flags);
441
442 return retval;
443 }
444
445 int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
446 unsigned int channel)
447 {
448 if (channel > 63) {
449 HPSB_ERR("%s called with invalid channel", __FUNCTION__);
450 return -EINVAL;
451 }
452
453 if (host->iso_listen_count[channel]++ == 0) {
454 return host->driver->devctl(host, ISO_LISTEN_CHANNEL, channel);
455 }
456
457 return 0;
458 }
459
460 void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
461 unsigned int channel)
462 {
463 if (channel > 63) {
464 HPSB_ERR("%s called with invalid channel", __FUNCTION__);
465 return;
466 }
467
468 if (--host->iso_listen_count[channel] == 0) {
469 host->driver->devctl(host, ISO_UNLISTEN_CHANNEL, channel);
470 }
471 }
472
473 static void init_hpsb_highlevel(struct hpsb_host *host)
474 {
475 INIT_LIST_HEAD(&dummy_zero_addr.host_list);
476 INIT_LIST_HEAD(&dummy_zero_addr.hl_list);
477 INIT_LIST_HEAD(&dummy_max_addr.host_list);
478 INIT_LIST_HEAD(&dummy_max_addr.hl_list);
479
480 dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops;
481
482 dummy_zero_addr.start = dummy_zero_addr.end = 0;
483 dummy_max_addr.start = dummy_max_addr.end = ((u64) 1) << 48;
484
485 list_add_tail(&dummy_zero_addr.host_list, &host->addr_space);
486 list_add_tail(&dummy_max_addr.host_list, &host->addr_space);
487 }
488
489 void highlevel_add_host(struct hpsb_host *host)
490 {
491 struct hpsb_highlevel *hl;
492
493 init_hpsb_highlevel(host);
494
495 down_read(&hl_drivers_sem);
496 list_for_each_entry(hl, &hl_drivers, hl_list) {
497 if (hl->add_host)
498 hl->add_host(host);
499 }
500 up_read(&hl_drivers_sem);
501 if (host->update_config_rom) {
502 if (hpsb_update_config_rom_image(host) < 0)
503 HPSB_ERR("Failed to generate Configuration ROM image for "
504 "host %s-%d", hl->name, host->id);
505 }
506 }
507
508 void highlevel_remove_host(struct hpsb_host *host)
509 {
510 struct hpsb_highlevel *hl;
511
512 down_read(&hl_drivers_sem);
513 list_for_each_entry(hl, &hl_drivers, hl_list)
514 __unregister_host(hl, host, 0);
515 up_read(&hl_drivers_sem);
516 }
517
518 void highlevel_host_reset(struct hpsb_host *host)
519 {
520 struct hpsb_highlevel *hl;
521
522 read_lock(&hl_irqs_lock);
523 list_for_each_entry(hl, &hl_irqs, irq_list) {
524 if (hl->host_reset)
525 hl->host_reset(host);
526 }
527 read_unlock(&hl_irqs_lock);
528 }
529
530 void highlevel_iso_receive(struct hpsb_host *host, void *data, size_t length)
531 {
532 struct hpsb_highlevel *hl;
533 int channel = (((quadlet_t *)data)[0] >> 8) & 0x3f;
534
535 read_lock(&hl_irqs_lock);
536 list_for_each_entry(hl, &hl_irqs, irq_list) {
537 if (hl->iso_receive)
538 hl->iso_receive(host, channel, data, length);
539 }
540 read_unlock(&hl_irqs_lock);
541 }
542
543 void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
544 void *data, size_t length)
545 {
546 struct hpsb_highlevel *hl;
547 int cts = ((quadlet_t *)data)[0] >> 4;
548
549 read_lock(&hl_irqs_lock);
550 list_for_each_entry(hl, &hl_irqs, irq_list) {
551 if (hl->fcp_request)
552 hl->fcp_request(host, nodeid, direction, cts, data,
553 length);
554 }
555 read_unlock(&hl_irqs_lock);
556 }
557
558 int highlevel_read(struct hpsb_host *host, int nodeid, void *data,
559 u64 addr, unsigned int length, u16 flags)
560 {
561 struct hpsb_address_serve *as;
562 unsigned int partlength;
563 int rcode = RCODE_ADDRESS_ERROR;
564
565 read_lock(&addr_space_lock);
566
567 list_for_each_entry(as, &host->addr_space, host_list) {
568 if (as->start > addr)
569 break;
570
571 if (as->end > addr) {
572 partlength = min(as->end - addr, (u64) length);
573
574 if (as->op->read) {
575 rcode = as->op->read(host, nodeid, data,
576 addr, partlength, flags);
577 } else {
578 rcode = RCODE_TYPE_ERROR;
579 }
580
581 data += partlength;
582 length -= partlength;
583 addr += partlength;
584
585 if ((rcode != RCODE_COMPLETE) || !length) {
586 break;
587 }
588 }
589 }
590
591 read_unlock(&addr_space_lock);
592
593 if (length && (rcode == RCODE_COMPLETE)) {
594 rcode = RCODE_ADDRESS_ERROR;
595 }
596
597 return rcode;
598 }
599
600 int highlevel_write(struct hpsb_host *host, int nodeid, int destid,
601 void *data, u64 addr, unsigned int length, u16 flags)
602 {
603 struct hpsb_address_serve *as;
604 unsigned int partlength;
605 int rcode = RCODE_ADDRESS_ERROR;
606
607 read_lock(&addr_space_lock);
608
609 list_for_each_entry(as, &host->addr_space, host_list) {
610 if (as->start > addr)
611 break;
612
613 if (as->end > addr) {
614 partlength = min(as->end - addr, (u64) length);
615
616 if (as->op->write) {
617 rcode = as->op->write(host, nodeid, destid,
618 data, addr, partlength, flags);
619 } else {
620 rcode = RCODE_TYPE_ERROR;
621 }
622
623 data += partlength;
624 length -= partlength;
625 addr += partlength;
626
627 if ((rcode != RCODE_COMPLETE) || !length) {
628 break;
629 }
630 }
631 }
632
633 read_unlock(&addr_space_lock);
634
635 if (length && (rcode == RCODE_COMPLETE)) {
636 rcode = RCODE_ADDRESS_ERROR;
637 }
638
639 return rcode;
640 }
641
642
643 int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
644 u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, u16 flags)
645 {
646 struct hpsb_address_serve *as;
647 int rcode = RCODE_ADDRESS_ERROR;
648
649 read_lock(&addr_space_lock);
650
651 list_for_each_entry(as, &host->addr_space, host_list) {
652 if (as->start > addr)
653 break;
654
655 if (as->end > addr) {
656 if (as->op->lock) {
657 rcode = as->op->lock(host, nodeid, store, addr,
658 data, arg, ext_tcode, flags);
659 } else {
660 rcode = RCODE_TYPE_ERROR;
661 }
662
663 break;
664 }
665 }
666
667 read_unlock(&addr_space_lock);
668
669 return rcode;
670 }
671
672 int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
673 u64 addr, octlet_t data, octlet_t arg, int ext_tcode, u16 flags)
674 {
675 struct hpsb_address_serve *as;
676 int rcode = RCODE_ADDRESS_ERROR;
677
678 read_lock(&addr_space_lock);
679
680 list_for_each_entry(as, &host->addr_space, host_list) {
681 if (as->start > addr)
682 break;
683
684 if (as->end > addr) {
685 if (as->op->lock64) {
686 rcode = as->op->lock64(host, nodeid, store,
687 addr, data, arg,
688 ext_tcode, flags);
689 } else {
690 rcode = RCODE_TYPE_ERROR;
691 }
692
693 break;
694 }
695 }
696
697 read_unlock(&addr_space_lock);
698
699 return rcode;
700 }
kernel source for telekom puls (alcatel/mediatek)