1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20#include <linux/config.h>
21#include <linux/slab.h>
22#include <linux/list.h>
23
24#include "ieee1394.h"
25#include "ieee1394_types.h"
26#include "hosts.h"
27#include "ieee1394_core.h"
28#include "highlevel.h"
29
30
31struct hl_host_info {
32 struct list_head list;
33 struct hpsb_host *host;
34 size_t size;
35 unsigned long key;
36 void *data;
37};
38
39
40static LIST_HEAD(hl_drivers);
41static rwlock_t hl_drivers_lock = RW_LOCK_UNLOCKED;
42
43static LIST_HEAD(addr_space);
44static rwlock_t addr_space_lock = RW_LOCK_UNLOCKED;
45
46
47static struct hpsb_address_ops dummy_ops = { NULL, NULL, NULL, NULL };
48static struct hpsb_address_serve dummy_zero_addr, dummy_max_addr;
49
50
51static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl,
52 struct hpsb_host *host)
53{
54 struct hl_host_info *hi = NULL;
55 struct list_head *lh;
56
57 if (!hl || !host)
58 return NULL;
59
60 read_lock(&hl->host_info_lock);
61 list_for_each (lh, &hl->host_info_list) {
62 hi = list_entry(lh, struct hl_host_info, list);
63 if (hi->host == host)
64 break;
65 hi = NULL;
66 }
67 read_unlock(&hl->host_info_lock);
68
69 return hi;
70}
71
72
73
74
75void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
76{
77 struct hl_host_info *hi = hl_get_hostinfo(hl, host);
78
79 if (hi)
80 return hi->data;
81
82 return NULL;
83}
84
85
86
87void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
88 size_t data_size)
89{
90 struct hl_host_info *hi;
91 void *data;
92 unsigned long flags;
93
94 hi = hl_get_hostinfo(hl, host);
95 if (hi) {
96 HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already exists",
97 hl->name);
98 return NULL;
99 }
100
101 hi = kmalloc(sizeof(*hi) + data_size, GFP_KERNEL);
102 if (!hi)
103 return NULL;
104
105 memset(hi, 0, sizeof(*hi) + data_size);
106
107 if (data_size) {
108 data = hi->data = hi + 1;
109 hi->size = data_size;
110 } else
111 data = hi;
112
113 hi->host = host;
114
115 write_lock_irqsave(&hl->host_info_lock, flags);
116 list_add_tail(&hi->list, &hl->host_info_list);
117 write_unlock_irqrestore(&hl->host_info_lock, flags);
118
119 return data;
120}
121
122
123int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
124 void *data)
125{
126 struct hl_host_info *hi;
127
128 hi = hl_get_hostinfo(hl, host);
129 if (hi) {
130 if (!hi->size && !hi->data) {
131 hi->data = data;
132 return 0;
133 } else
134 HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo already has data",
135 hl->name);
136 } else
137 HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists",
138 hl->name);
139
140 return -EINVAL;
141}
142
143
144void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
145{
146 struct hl_host_info *hi;
147
148 hi = hl_get_hostinfo(hl, host);
149 if (hi) {
150 unsigned long flags;
151 write_lock_irqsave(&hl->host_info_lock, flags);
152 list_del(&hi->list);
153 write_unlock_irqrestore(&hl->host_info_lock, flags);
154 kfree(hi);
155 }
156
157 return;
158}
159
160
161void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, unsigned long key)
162{
163 struct hl_host_info *hi;
164
165 hi = hl_get_hostinfo(hl, host);
166 if (hi)
167 hi->key = key;
168
169 return;
170}
171
172
173unsigned long hpsb_get_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host)
174{
175 struct hl_host_info *hi;
176
177 hi = hl_get_hostinfo(hl, host);
178 if (hi)
179 return hi->key;
180
181 return 0;
182}
183
184
185void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key)
186{
187 struct list_head *lh;
188 struct hl_host_info *hi;
189 void *data = NULL;
190
191 if (!hl)
192 return NULL;
193
194 read_lock(&hl->host_info_lock);
195 list_for_each (lh, &hl->host_info_list) {
196 hi = list_entry(lh, struct hl_host_info, list);
197 if (hi->key == key) {
198 data = hi->data;
199 break;
200 }
201 }
202 read_unlock(&hl->host_info_lock);
203
204 return data;
205}
206
207
208struct hpsb_host *hpsb_get_host_bykey(struct hpsb_highlevel *hl, unsigned long key)
209{
210 struct list_head *lh;
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 (lh, &hl->host_info_list) {
219 hi = list_entry(lh, struct hl_host_info, list);
220 if (hi->key == key) {
221 host = hi->host;
222 break;
223 }
224 }
225 read_unlock(&hl->host_info_lock);
226
227 return host;
228}
229
230
231void hpsb_register_highlevel(struct hpsb_highlevel *hl)
232{
233 struct list_head *lh;
234 unsigned long flags;
235
236 INIT_LIST_HEAD(&hl->addr_list);
237 INIT_LIST_HEAD(&hl->host_info_list);
238
239 rwlock_init(&hl->host_info_lock);
240
241 write_lock_irqsave(&hl_drivers_lock, flags);
242 list_add_tail(&hl->hl_list, &hl_drivers);
243 write_unlock_irqrestore(&hl_drivers_lock, flags);
244
245 if (hl->add_host) {
246 down(&hpsb_hosts_lock);
247 list_for_each (lh, &hpsb_hosts) {
248 struct hpsb_host *host = list_entry(lh, struct hpsb_host, host_list);
249 hl->add_host(host);
250 }
251 up(&hpsb_hosts_lock);
252 }
253
254 return;
255}
256
257void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
258{
259 struct list_head *lh, *next;
260 struct hpsb_address_serve *as;
261 unsigned long flags;
262
263 write_lock_irqsave(&addr_space_lock, flags);
264 list_for_each_safe (lh, next, &hl->addr_list) {
265 as = list_entry(lh, struct hpsb_address_serve, addr_list);
266 list_del(&as->as_list);
267 kfree(as);
268 }
269 write_unlock_irqrestore(&addr_space_lock, flags);
270
271 write_lock_irqsave(&hl_drivers_lock, flags);
272 list_del(&hl->hl_list);
273 write_unlock_irqrestore(&hl_drivers_lock, flags);
274
275 if (hl->remove_host) {
276 down(&hpsb_hosts_lock);
277 list_for_each(lh, &hpsb_hosts) {
278 struct hpsb_host *host = list_entry(lh, struct hpsb_host, host_list);
279
280 hl->remove_host(host);
281 hpsb_destroy_hostinfo(hl, host);
282 }
283 up(&hpsb_hosts_lock);
284 }
285}
286
287int hpsb_register_addrspace(struct hpsb_highlevel *hl,
288 struct hpsb_address_ops *ops, u64 start, u64 end)
289{
290 struct hpsb_address_serve *as;
291 struct list_head *entry;
292 int retval = 0;
293 unsigned long flags;
294
295 if (((start|end) & 3) || (start >= end) || (end > 0x1000000000000ULL)) {
296 HPSB_ERR("%s called with invalid addresses", __FUNCTION__);
297 return 0;
298 }
299
300 as = (struct hpsb_address_serve *)
301 kmalloc(sizeof(struct hpsb_address_serve), GFP_KERNEL);
302 if (as == NULL) {
303 return 0;
304 }
305
306 INIT_LIST_HEAD(&as->as_list);
307 INIT_LIST_HEAD(&as->addr_list);
308 as->op = ops;
309 as->start = start;
310 as->end = end;
311
312 write_lock_irqsave(&addr_space_lock, flags);
313 entry = addr_space.next;
314
315 while (list_entry(entry, struct hpsb_address_serve, as_list)->end
316 <= start) {
317 if (list_entry(entry->next, struct hpsb_address_serve, as_list)
318 ->start >= end) {
319 list_add(&as->as_list, entry);
320 list_add_tail(&as->addr_list, &hl->addr_list);
321 retval = 1;
322 break;
323 }
324 entry = entry->next;
325 }
326 write_unlock_irqrestore(&addr_space_lock, flags);
327
328 if (retval == 0) {
329 kfree(as);
330 }
331
332 return retval;
333}
334
335int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, u64 start)
336{
337 int retval = 0;
338 struct hpsb_address_serve *as;
339 struct list_head *entry;
340 unsigned long flags;
341
342 write_lock_irqsave(&addr_space_lock, flags);
343
344 entry = hl->addr_list.next;
345
346 while (entry != &hl->addr_list) {
347 as = list_entry(entry, struct hpsb_address_serve, addr_list);
348 entry = entry->next;
349 if (as->start == start) {
350 list_del(&as->as_list);
351 list_del(&as->addr_list);
352 kfree(as);
353 retval = 1;
354 break;
355 }
356 }
357
358 write_unlock_irqrestore(&addr_space_lock, flags);
359
360 return retval;
361}
362
363int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
364 unsigned int channel)
365{
366 if (channel > 63) {
367 HPSB_ERR("%s called with invalid channel", __FUNCTION__);
368 return -EINVAL;
369 }
370
371 if (host->iso_listen_count[channel]++ == 0) {
372 return host->driver->devctl(host, ISO_LISTEN_CHANNEL, channel);
373 }
374
375 return 0;
376}
377
378void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
379 unsigned int channel)
380{
381 if (channel > 63) {
382 HPSB_ERR("%s called with invalid channel", __FUNCTION__);
383 return;
384 }
385
386 if (--host->iso_listen_count[channel] == 0) {
387 host->driver->devctl(host, ISO_UNLISTEN_CHANNEL, channel);
388 }
389}
390
391
392void highlevel_add_host(struct hpsb_host *host)
393{
394 struct list_head *entry;
395 struct hpsb_highlevel *hl;
396
397 read_lock(&hl_drivers_lock);
398 list_for_each(entry, &hl_drivers) {
399 hl = list_entry(entry, struct hpsb_highlevel, hl_list);
400 if (hl->add_host)
401 hl->add_host(host);
402 }
403 read_unlock(&hl_drivers_lock);
404}
405
406void highlevel_remove_host(struct hpsb_host *host)
407{
408 struct list_head *entry;
409 struct hpsb_highlevel *hl;
410
411 read_lock(&hl_drivers_lock);
412 list_for_each(entry, &hl_drivers) {
413 hl = list_entry(entry, struct hpsb_highlevel, hl_list);
414
415 if (hl->remove_host) {
416 hl->remove_host(host);
417 hpsb_destroy_hostinfo(hl, host);
418 }
419 }
420 read_unlock(&hl_drivers_lock);
421}
422
423void highlevel_host_reset(struct hpsb_host *host)
424{
425 struct list_head *entry;
426 struct hpsb_highlevel *hl;
427
428 read_lock(&hl_drivers_lock);
429 list_for_each(entry, &hl_drivers) {
430 hl = list_entry(entry, struct hpsb_highlevel, hl_list);
431
432 if (hl->host_reset)
433 hl->host_reset(host);
434 }
435 read_unlock(&hl_drivers_lock);
436}
437
438void highlevel_iso_receive(struct hpsb_host *host, void *data,
439 size_t length)
440{
441 struct list_head *entry;
442 struct hpsb_highlevel *hl;
443 int channel = (((quadlet_t *)data)[0] >> 8) & 0x3f;
444
445 read_lock(&hl_drivers_lock);
446 entry = hl_drivers.next;
447
448 while (entry != &hl_drivers) {
449 hl = list_entry(entry, struct hpsb_highlevel, hl_list);
450 if (hl->iso_receive) {
451 hl->iso_receive(host, channel, data, length);
452 }
453 entry = entry->next;
454 }
455 read_unlock(&hl_drivers_lock);
456}
457
458void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
459 void *data, size_t length)
460{
461 struct list_head *entry;
462 struct hpsb_highlevel *hl;
463 int cts = ((quadlet_t *)data)[0] >> 4;
464
465 read_lock(&hl_drivers_lock);
466 entry = hl_drivers.next;
467
468 while (entry != &hl_drivers) {
469 hl = list_entry(entry, struct hpsb_highlevel, hl_list);
470 if (hl->fcp_request) {
471 hl->fcp_request(host, nodeid, direction, cts, data,
472 length);
473 }
474 entry = entry->next;
475 }
476 read_unlock(&hl_drivers_lock);
477}
478
479int highlevel_read(struct hpsb_host *host, int nodeid, void *data,
480 u64 addr, unsigned int length, u16 flags)
481{
482 struct hpsb_address_serve *as;
483 struct list_head *entry;
484 unsigned int partlength;
485 int rcode = RCODE_ADDRESS_ERROR;
486
487 read_lock(&addr_space_lock);
488
489 entry = addr_space.next;
490 as = list_entry(entry, struct hpsb_address_serve, as_list);
491
492 while (as->start <= addr) {
493 if (as->end > addr) {
494 partlength = min(as->end - addr, (u64) length);
495
496 if (as->op->read) {
497 rcode = as->op->read(host, nodeid, data,
498 addr, partlength, flags);
499 } else {
500 rcode = RCODE_TYPE_ERROR;
501 }
502
503 (u8 *)data += partlength;
504 length -= partlength;
505 addr += partlength;
506
507 if ((rcode != RCODE_COMPLETE) || !length) {
508 break;
509 }
510 }
511
512 entry = entry->next;
513 as = list_entry(entry, struct hpsb_address_serve, as_list);
514 }
515
516 read_unlock(&addr_space_lock);
517
518 if (length && (rcode == RCODE_COMPLETE)) {
519 rcode = RCODE_ADDRESS_ERROR;
520 }
521
522 return rcode;
523}
524
525int highlevel_write(struct hpsb_host *host, int nodeid, int destid,
526 void *data, u64 addr, unsigned int length, u16 flags)
527{
528 struct hpsb_address_serve *as;
529 struct list_head *entry;
530 unsigned int partlength;
531 int rcode = RCODE_ADDRESS_ERROR;
532
533 read_lock(&addr_space_lock);
534
535 entry = addr_space.next;
536 as = list_entry(entry, struct hpsb_address_serve, as_list);
537
538 while (as->start <= addr) {
539 if (as->end > addr) {
540 partlength = min(as->end - addr, (u64) length);
541
542 if (as->op->write) {
543 rcode = as->op->write(host, nodeid, destid,
544 data, addr, partlength, flags);
545 } else {
546 rcode = RCODE_TYPE_ERROR;
547 }
548
549 (u8 *)data += partlength;
550 length -= partlength;
551 addr += partlength;
552
553 if ((rcode != RCODE_COMPLETE) || !length) {
554 break;
555 }
556 }
557
558 entry = entry->next;
559 as = list_entry(entry, struct hpsb_address_serve, as_list);
560 }
561
562 read_unlock(&addr_space_lock);
563
564 if (length && (rcode == RCODE_COMPLETE)) {
565 rcode = RCODE_ADDRESS_ERROR;
566 }
567
568 return rcode;
569}
570
571
572int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
573 u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, u16 flags)
574{
575 struct hpsb_address_serve *as;
576 struct list_head *entry;
577 int rcode = RCODE_ADDRESS_ERROR;
578
579 read_lock(&addr_space_lock);
580
581 entry = addr_space.next;
582 as = list_entry(entry, struct hpsb_address_serve, as_list);
583
584 while (as->start <= addr) {
585 if (as->end > addr) {
586 if (as->op->lock) {
587 rcode = as->op->lock(host, nodeid, store, addr,
588 data, arg, ext_tcode, flags);
589 } else {
590 rcode = RCODE_TYPE_ERROR;
591 }
592
593 break;
594 }
595
596 entry = entry->next;
597 as = list_entry(entry, struct hpsb_address_serve, as_list);
598 }
599
600 read_unlock(&addr_space_lock);
601
602 return rcode;
603}
604
605int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
606 u64 addr, octlet_t data, octlet_t arg, int ext_tcode, u16 flags)
607{
608 struct hpsb_address_serve *as;
609 struct list_head *entry;
610 int rcode = RCODE_ADDRESS_ERROR;
611
612 read_lock(&addr_space_lock);
613
614 entry = addr_space.next;
615 as = list_entry(entry, struct hpsb_address_serve, as_list);
616
617 while (as->start <= addr) {
618 if (as->end > addr) {
619 if (as->op->lock64) {
620 rcode = as->op->lock64(host, nodeid, store,
621 addr, data, arg,
622 ext_tcode, flags);
623 } else {
624 rcode = RCODE_TYPE_ERROR;
625 }
626
627 break;
628 }
629
630 entry = entry->next;
631 as = list_entry(entry, struct hpsb_address_serve, as_list);
632 }
633
634 read_unlock(&addr_space_lock);
635
636 return rcode;
637}
638
639void init_hpsb_highlevel(void)
640{
641 INIT_LIST_HEAD(&dummy_zero_addr.as_list);
642 INIT_LIST_HEAD(&dummy_zero_addr.addr_list);
643 INIT_LIST_HEAD(&dummy_max_addr.as_list);
644 INIT_LIST_HEAD(&dummy_max_addr.addr_list);
645
646 dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops;
647
648 dummy_zero_addr.start = dummy_zero_addr.end = 0;
649 dummy_max_addr.start = dummy_max_addr.end = ((u64) 1) << 48;
650
651 list_add_tail(&dummy_zero_addr.as_list, &addr_space);
652 list_add_tail(&dummy_max_addr.as_list, &addr_space);
653}
654
