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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/slab.h> |
21 | #include <linux/list.h> |
22 | #include <linux/bitops.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 | #include "nodemgr.h" |
30 | |
31 | |
32 | struct hl_host_info { |
33 | struct list_head list; |
34 | struct hpsb_host *host; |
35 | size_t size; |
36 | unsigned long key; |
37 | void *data; |
38 | }; |
39 | |
40 | |
41 | static LIST_HEAD(hl_drivers); |
42 | static DECLARE_RWSEM(hl_drivers_sem); |
43 | |
44 | static LIST_HEAD(hl_irqs); |
45 | static DEFINE_RWLOCK(hl_irqs_lock); |
46 | |
47 | static DEFINE_RWLOCK(addr_space_lock); |
48 | |
49 | |
50 | static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl, |
51 | struct hpsb_host *host) |
52 | { |
53 | struct hl_host_info *hi = NULL; |
54 | |
55 | if (!hl || !host) |
56 | return NULL; |
57 | |
58 | read_lock(&hl->host_info_lock); |
59 | list_for_each_entry(hi, &hl->host_info_list, list) { |
60 | if (hi->host == host) { |
61 | read_unlock(&hl->host_info_lock); |
62 | return hi; |
63 | } |
64 | } |
65 | read_unlock(&hl->host_info_lock); |
66 | return NULL; |
67 | } |
68 | |
69 | /** |
70 | * hpsb_get_hostinfo - retrieve a hostinfo pointer bound to this driver/host |
71 | * |
72 | * Returns a per @host and @hl driver data structure that was previously stored |
73 | * by hpsb_create_hostinfo. |
74 | */ |
75 | void *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 | return hi ? hi->data : NULL; |
80 | } |
81 | |
82 | /** |
83 | * hpsb_create_hostinfo - allocate a hostinfo pointer bound to this driver/host |
84 | * |
85 | * Allocate a hostinfo pointer backed by memory with @data_size and bind it to |
86 | * to this @hl driver and @host. If @data_size is zero, then the return here is |
87 | * only valid for error checking. |
88 | */ |
89 | void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, |
90 | size_t data_size) |
91 | { |
92 | struct hl_host_info *hi; |
93 | void *data; |
94 | unsigned long flags; |
95 | |
96 | hi = hl_get_hostinfo(hl, host); |
97 | if (hi) { |
98 | HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already" |
99 | " exists", hl->name); |
100 | return NULL; |
101 | } |
102 | |
103 | hi = kzalloc(sizeof(*hi) + data_size, GFP_ATOMIC); |
104 | if (!hi) |
105 | return NULL; |
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 | /** |
123 | * hpsb_set_hostinfo - set the hostinfo pointer to something useful |
124 | * |
125 | * Usually follows a call to hpsb_create_hostinfo, where the size is 0. |
126 | */ |
127 | int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, |
128 | void *data) |
129 | { |
130 | struct hl_host_info *hi; |
131 | |
132 | hi = hl_get_hostinfo(hl, host); |
133 | if (hi) { |
134 | if (!hi->size && !hi->data) { |
135 | hi->data = data; |
136 | return 0; |
137 | } else |
138 | HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo " |
139 | "already has data", hl->name); |
140 | } else |
141 | HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists", |
142 | hl->name); |
143 | return -EINVAL; |
144 | } |
145 | |
146 | /** |
147 | * hpsb_destroy_hostinfo - free and remove a hostinfo pointer |
148 | * |
149 | * Free and remove the hostinfo pointer bound to this @hl driver and @host. |
150 | */ |
151 | void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host) |
152 | { |
153 | struct hl_host_info *hi; |
154 | |
155 | hi = hl_get_hostinfo(hl, host); |
156 | if (hi) { |
157 | unsigned long flags; |
158 | write_lock_irqsave(&hl->host_info_lock, flags); |
159 | list_del(&hi->list); |
160 | write_unlock_irqrestore(&hl->host_info_lock, flags); |
161 | kfree(hi); |
162 | } |
163 | return; |
164 | } |
165 | |
166 | /** |
167 | * hpsb_set_hostinfo_key - set an alternate lookup key for an hostinfo |
168 | * |
169 | * Sets an alternate lookup key for the hostinfo bound to this @hl driver and |
170 | * @host. |
171 | */ |
172 | void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, |
173 | unsigned long key) |
174 | { |
175 | struct hl_host_info *hi; |
176 | |
177 | hi = hl_get_hostinfo(hl, host); |
178 | if (hi) |
179 | hi->key = key; |
180 | return; |
181 | } |
182 | |
183 | /** |
184 | * hpsb_get_hostinfo_bykey - retrieve a hostinfo pointer by its alternate key |
185 | */ |
186 | void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key) |
187 | { |
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_entry(hi, &hl->host_info_list, list) { |
196 | if (hi->key == key) { |
197 | data = hi->data; |
198 | break; |
199 | } |
200 | } |
201 | read_unlock(&hl->host_info_lock); |
202 | return data; |
203 | } |
204 | |
205 | static int highlevel_for_each_host_reg(struct hpsb_host *host, void *__data) |
206 | { |
207 | struct hpsb_highlevel *hl = __data; |
208 | |
209 | hl->add_host(host); |
210 | |
211 | if (host->update_config_rom && hpsb_update_config_rom_image(host) < 0) |
212 | HPSB_ERR("Failed to generate Configuration ROM image for host " |
213 | "%s-%d", hl->name, host->id); |
214 | return 0; |
215 | } |
216 | |
217 | /** |
218 | * hpsb_register_highlevel - register highlevel driver |
219 | * |
220 | * The name pointer in @hl has to stay valid at all times because the string is |
221 | * not copied. |
222 | */ |
223 | void hpsb_register_highlevel(struct hpsb_highlevel *hl) |
224 | { |
225 | unsigned long flags; |
226 | |
227 | hpsb_init_highlevel(hl); |
228 | INIT_LIST_HEAD(&hl->addr_list); |
229 | |
230 | down_write(&hl_drivers_sem); |
231 | list_add_tail(&hl->hl_list, &hl_drivers); |
232 | up_write(&hl_drivers_sem); |
233 | |
234 | write_lock_irqsave(&hl_irqs_lock, flags); |
235 | list_add_tail(&hl->irq_list, &hl_irqs); |
236 | write_unlock_irqrestore(&hl_irqs_lock, flags); |
237 | |
238 | if (hl->add_host) |
239 | nodemgr_for_each_host(hl, highlevel_for_each_host_reg); |
240 | return; |
241 | } |
242 | |
243 | static void __delete_addr(struct hpsb_address_serve *as) |
244 | { |
245 | list_del(&as->host_list); |
246 | list_del(&as->hl_list); |
247 | kfree(as); |
248 | } |
249 | |
250 | static void __unregister_host(struct hpsb_highlevel *hl, struct hpsb_host *host, |
251 | int update_cr) |
252 | { |
253 | unsigned long flags; |
254 | struct list_head *lh, *next; |
255 | struct hpsb_address_serve *as; |
256 | |
257 | /* First, let the highlevel driver unreg */ |
258 | if (hl->remove_host) |
259 | hl->remove_host(host); |
260 | |
261 | /* Remove any addresses that are matched for this highlevel driver |
262 | * and this particular host. */ |
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, hl_list); |
266 | if (as->host == host) |
267 | __delete_addr(as); |
268 | } |
269 | write_unlock_irqrestore(&addr_space_lock, flags); |
270 | |
271 | /* Now update the config-rom to reflect anything removed by the |
272 | * highlevel driver. */ |
273 | if (update_cr && host->update_config_rom && |
274 | hpsb_update_config_rom_image(host) < 0) |
275 | HPSB_ERR("Failed to generate Configuration ROM image for host " |
276 | "%s-%d", hl->name, host->id); |
277 | |
278 | /* Finally remove all the host info associated between these two. */ |
279 | hpsb_destroy_hostinfo(hl, host); |
280 | } |
281 | |
282 | static int highlevel_for_each_host_unreg(struct hpsb_host *host, void *__data) |
283 | { |
284 | struct hpsb_highlevel *hl = __data; |
285 | |
286 | __unregister_host(hl, host, 1); |
287 | return 0; |
288 | } |
289 | |
290 | /** |
291 | * hpsb_unregister_highlevel - unregister highlevel driver |
292 | */ |
293 | void hpsb_unregister_highlevel(struct hpsb_highlevel *hl) |
294 | { |
295 | unsigned long flags; |
296 | |
297 | write_lock_irqsave(&hl_irqs_lock, flags); |
298 | list_del(&hl->irq_list); |
299 | write_unlock_irqrestore(&hl_irqs_lock, flags); |
300 | |
301 | down_write(&hl_drivers_sem); |
302 | list_del(&hl->hl_list); |
303 | up_write(&hl_drivers_sem); |
304 | |
305 | nodemgr_for_each_host(hl, highlevel_for_each_host_unreg); |
306 | } |
307 | |
308 | /** |
309 | * hpsb_allocate_and_register_addrspace - alloc' and reg' a host address space |
310 | * |
311 | * @start and @end are 48 bit pointers and have to be quadlet aligned. |
312 | * @end points to the first address behind the handled addresses. This |
313 | * function can be called multiple times for a single hpsb_highlevel @hl to |
314 | * implement sparse register sets. The requested region must not overlap any |
315 | * previously allocated region, otherwise registering will fail. |
316 | * |
317 | * It returns true for successful allocation. Address spaces can be |
318 | * unregistered with hpsb_unregister_addrspace. All remaining address spaces |
319 | * are automatically deallocated together with the hpsb_highlevel @hl. |
320 | */ |
321 | u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl, |
322 | struct hpsb_host *host, |
323 | const struct hpsb_address_ops *ops, |
324 | u64 size, u64 alignment, |
325 | u64 start, u64 end) |
326 | { |
327 | struct hpsb_address_serve *as, *a1, *a2; |
328 | struct list_head *entry; |
329 | u64 retval = CSR1212_INVALID_ADDR_SPACE; |
330 | unsigned long flags; |
331 | u64 align_mask = ~(alignment - 1); |
332 | |
333 | if ((alignment & 3) || (alignment > 0x800000000000ULL) || |
334 | (hweight64(alignment) != 1)) { |
335 | HPSB_ERR("%s called with invalid alignment: 0x%048llx", |
336 | __func__, (unsigned long long)alignment); |
337 | return retval; |
338 | } |
339 | |
340 | /* default range, |
341 | * avoids controller's posted write area (see OHCI 1.1 clause 1.5) */ |
342 | if (start == CSR1212_INVALID_ADDR_SPACE && |
343 | end == CSR1212_INVALID_ADDR_SPACE) { |
344 | start = host->middle_addr_space; |
345 | end = CSR1212_ALL_SPACE_END; |
346 | } |
347 | |
348 | if (((start|end) & ~align_mask) || (start >= end) || |
349 | (end > CSR1212_ALL_SPACE_END)) { |
350 | HPSB_ERR("%s called with invalid addresses " |
351 | "(start = %012Lx end = %012Lx)", __func__, |
352 | (unsigned long long)start,(unsigned long long)end); |
353 | return retval; |
354 | } |
355 | |
356 | as = kmalloc(sizeof(*as), GFP_KERNEL); |
357 | if (!as) |
358 | return retval; |
359 | |
360 | INIT_LIST_HEAD(&as->host_list); |
361 | INIT_LIST_HEAD(&as->hl_list); |
362 | as->op = ops; |
363 | as->host = host; |
364 | |
365 | write_lock_irqsave(&addr_space_lock, flags); |
366 | list_for_each(entry, &host->addr_space) { |
367 | u64 a1sa, a1ea; |
368 | u64 a2sa, a2ea; |
369 | |
370 | a1 = list_entry(entry, struct hpsb_address_serve, host_list); |
371 | a2 = list_entry(entry->next, struct hpsb_address_serve, |
372 | host_list); |
373 | |
374 | a1sa = a1->start & align_mask; |
375 | a1ea = (a1->end + alignment -1) & align_mask; |
376 | a2sa = a2->start & align_mask; |
377 | a2ea = (a2->end + alignment -1) & align_mask; |
378 | |
379 | if ((a2sa - a1ea >= size) && (a2sa - start >= size) && |
380 | (a2sa > start)) { |
381 | as->start = max(start, a1ea); |
382 | as->end = as->start + size; |
383 | list_add(&as->host_list, entry); |
384 | list_add_tail(&as->hl_list, &hl->addr_list); |
385 | retval = as->start; |
386 | break; |
387 | } |
388 | } |
389 | write_unlock_irqrestore(&addr_space_lock, flags); |
390 | |
391 | if (retval == CSR1212_INVALID_ADDR_SPACE) |
392 | kfree(as); |
393 | return retval; |
394 | } |
395 | |
396 | /** |
397 | * hpsb_register_addrspace - register a host address space |
398 | * |
399 | * @start and @end are 48 bit pointers and have to be quadlet aligned. |
400 | * @end points to the first address behind the handled addresses. This |
401 | * function can be called multiple times for a single hpsb_highlevel @hl to |
402 | * implement sparse register sets. The requested region must not overlap any |
403 | * previously allocated region, otherwise registering will fail. |
404 | * |
405 | * It returns true for successful allocation. Address spaces can be |
406 | * unregistered with hpsb_unregister_addrspace. All remaining address spaces |
407 | * are automatically deallocated together with the hpsb_highlevel @hl. |
408 | */ |
409 | int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, |
410 | const struct hpsb_address_ops *ops, |
411 | u64 start, u64 end) |
412 | { |
413 | struct hpsb_address_serve *as; |
414 | struct list_head *lh; |
415 | int retval = 0; |
416 | unsigned long flags; |
417 | |
418 | if (((start|end) & 3) || (start >= end) || |
419 | (end > CSR1212_ALL_SPACE_END)) { |
420 | HPSB_ERR("%s called with invalid addresses", __func__); |
421 | return 0; |
422 | } |
423 | |
424 | as = kmalloc(sizeof(*as), GFP_KERNEL); |
425 | if (!as) |
426 | return 0; |
427 | |
428 | INIT_LIST_HEAD(&as->host_list); |
429 | INIT_LIST_HEAD(&as->hl_list); |
430 | as->op = ops; |
431 | as->start = start; |
432 | as->end = end; |
433 | as->host = host; |
434 | |
435 | write_lock_irqsave(&addr_space_lock, flags); |
436 | list_for_each(lh, &host->addr_space) { |
437 | struct hpsb_address_serve *as_this = |
438 | list_entry(lh, struct hpsb_address_serve, host_list); |
439 | struct hpsb_address_serve *as_next = |
440 | list_entry(lh->next, struct hpsb_address_serve, |
441 | host_list); |
442 | |
443 | if (as_this->end > as->start) |
444 | break; |
445 | |
446 | if (as_next->start >= as->end) { |
447 | list_add(&as->host_list, lh); |
448 | list_add_tail(&as->hl_list, &hl->addr_list); |
449 | retval = 1; |
450 | break; |
451 | } |
452 | } |
453 | write_unlock_irqrestore(&addr_space_lock, flags); |
454 | |
455 | if (retval == 0) |
456 | kfree(as); |
457 | return retval; |
458 | } |
459 | |
460 | int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, |
461 | u64 start) |
462 | { |
463 | int retval = 0; |
464 | struct hpsb_address_serve *as; |
465 | struct list_head *lh, *next; |
466 | unsigned long flags; |
467 | |
468 | write_lock_irqsave(&addr_space_lock, flags); |
469 | list_for_each_safe (lh, next, &hl->addr_list) { |
470 | as = list_entry(lh, struct hpsb_address_serve, hl_list); |
471 | if (as->start == start && as->host == host) { |
472 | __delete_addr(as); |
473 | retval = 1; |
474 | break; |
475 | } |
476 | } |
477 | write_unlock_irqrestore(&addr_space_lock, flags); |
478 | return retval; |
479 | } |
480 | |
481 | static const struct hpsb_address_ops dummy_ops; |
482 | |
483 | /* dummy address spaces as lower and upper bounds of the host's a.s. list */ |
484 | static void init_hpsb_highlevel(struct hpsb_host *host) |
485 | { |
486 | INIT_LIST_HEAD(&host->dummy_zero_addr.host_list); |
487 | INIT_LIST_HEAD(&host->dummy_zero_addr.hl_list); |
488 | INIT_LIST_HEAD(&host->dummy_max_addr.host_list); |
489 | INIT_LIST_HEAD(&host->dummy_max_addr.hl_list); |
490 | |
491 | host->dummy_zero_addr.op = host->dummy_max_addr.op = &dummy_ops; |
492 | |
493 | host->dummy_zero_addr.start = host->dummy_zero_addr.end = 0; |
494 | host->dummy_max_addr.start = host->dummy_max_addr.end = ((u64) 1) << 48; |
495 | |
496 | list_add_tail(&host->dummy_zero_addr.host_list, &host->addr_space); |
497 | list_add_tail(&host->dummy_max_addr.host_list, &host->addr_space); |
498 | } |
499 | |
500 | void highlevel_add_host(struct hpsb_host *host) |
501 | { |
502 | struct hpsb_highlevel *hl; |
503 | |
504 | init_hpsb_highlevel(host); |
505 | |
506 | down_read(&hl_drivers_sem); |
507 | list_for_each_entry(hl, &hl_drivers, hl_list) { |
508 | if (hl->add_host) |
509 | hl->add_host(host); |
510 | } |
511 | up_read(&hl_drivers_sem); |
512 | if (host->update_config_rom && hpsb_update_config_rom_image(host) < 0) |
513 | HPSB_ERR("Failed to generate Configuration ROM image for host " |
514 | "%s-%d", hl->name, host->id); |
515 | } |
516 | |
517 | void highlevel_remove_host(struct hpsb_host *host) |
518 | { |
519 | struct hpsb_highlevel *hl; |
520 | |
521 | down_read(&hl_drivers_sem); |
522 | list_for_each_entry(hl, &hl_drivers, hl_list) |
523 | __unregister_host(hl, host, 0); |
524 | up_read(&hl_drivers_sem); |
525 | } |
526 | |
527 | void highlevel_host_reset(struct hpsb_host *host) |
528 | { |
529 | unsigned long flags; |
530 | struct hpsb_highlevel *hl; |
531 | |
532 | read_lock_irqsave(&hl_irqs_lock, flags); |
533 | list_for_each_entry(hl, &hl_irqs, irq_list) { |
534 | if (hl->host_reset) |
535 | hl->host_reset(host); |
536 | } |
537 | read_unlock_irqrestore(&hl_irqs_lock, flags); |
538 | } |
539 | |
540 | void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction, |
541 | void *data, size_t length) |
542 | { |
543 | unsigned long flags; |
544 | struct hpsb_highlevel *hl; |
545 | int cts = ((quadlet_t *)data)[0] >> 4; |
546 | |
547 | read_lock_irqsave(&hl_irqs_lock, flags); |
548 | list_for_each_entry(hl, &hl_irqs, irq_list) { |
549 | if (hl->fcp_request) |
550 | hl->fcp_request(host, nodeid, direction, cts, data, |
551 | length); |
552 | } |
553 | read_unlock_irqrestore(&hl_irqs_lock, flags); |
554 | } |
555 | |
556 | /* |
557 | * highlevel_read, highlevel_write, highlevel_lock, highlevel_lock64: |
558 | * |
559 | * These functions are called to handle transactions. They are called when a |
560 | * packet arrives. The flags argument contains the second word of the first |
561 | * header quadlet of the incoming packet (containing transaction label, retry |
562 | * code, transaction code and priority). These functions either return a |
563 | * response code or a negative number. In the first case a response will be |
564 | * generated. In the latter case, no response will be sent and the driver which |
565 | * handled the request will send the response itself. |
566 | */ |
567 | int highlevel_read(struct hpsb_host *host, int nodeid, void *data, u64 addr, |
568 | unsigned int length, u16 flags) |
569 | { |
570 | struct hpsb_address_serve *as; |
571 | unsigned int partlength; |
572 | int rcode = RCODE_ADDRESS_ERROR; |
573 | |
574 | read_lock(&addr_space_lock); |
575 | list_for_each_entry(as, &host->addr_space, host_list) { |
576 | if (as->start > addr) |
577 | break; |
578 | |
579 | if (as->end > addr) { |
580 | partlength = min(as->end - addr, (u64) length); |
581 | |
582 | if (as->op->read) |
583 | rcode = as->op->read(host, nodeid, data, |
584 | addr, partlength, flags); |
585 | else |
586 | rcode = RCODE_TYPE_ERROR; |
587 | |
588 | data += partlength; |
589 | length -= partlength; |
590 | addr += partlength; |
591 | |
592 | if ((rcode != RCODE_COMPLETE) || !length) |
593 | break; |
594 | } |
595 | } |
596 | read_unlock(&addr_space_lock); |
597 | |
598 | if (length && (rcode == RCODE_COMPLETE)) |
599 | rcode = RCODE_ADDRESS_ERROR; |
600 | return rcode; |
601 | } |
602 | |
603 | int highlevel_write(struct hpsb_host *host, int nodeid, int destid, void *data, |
604 | u64 addr, unsigned int length, u16 flags) |
605 | { |
606 | struct hpsb_address_serve *as; |
607 | unsigned int partlength; |
608 | int rcode = RCODE_ADDRESS_ERROR; |
609 | |
610 | read_lock(&addr_space_lock); |
611 | list_for_each_entry(as, &host->addr_space, host_list) { |
612 | if (as->start > addr) |
613 | break; |
614 | |
615 | if (as->end > addr) { |
616 | partlength = min(as->end - addr, (u64) length); |
617 | |
618 | if (as->op->write) |
619 | rcode = as->op->write(host, nodeid, destid, |
620 | data, addr, partlength, |
621 | flags); |
622 | else |
623 | rcode = RCODE_TYPE_ERROR; |
624 | |
625 | data += partlength; |
626 | length -= partlength; |
627 | addr += partlength; |
628 | |
629 | if ((rcode != RCODE_COMPLETE) || !length) |
630 | break; |
631 | } |
632 | } |
633 | read_unlock(&addr_space_lock); |
634 | |
635 | if (length && (rcode == RCODE_COMPLETE)) |
636 | rcode = RCODE_ADDRESS_ERROR; |
637 | return rcode; |
638 | } |
639 | |
640 | int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store, |
641 | u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, |
642 | u16 flags) |
643 | { |
644 | struct hpsb_address_serve *as; |
645 | int rcode = RCODE_ADDRESS_ERROR; |
646 | |
647 | read_lock(&addr_space_lock); |
648 | list_for_each_entry(as, &host->addr_space, host_list) { |
649 | if (as->start > addr) |
650 | break; |
651 | |
652 | if (as->end > addr) { |
653 | if (as->op->lock) |
654 | rcode = as->op->lock(host, nodeid, store, addr, |
655 | data, arg, ext_tcode, |
656 | flags); |
657 | else |
658 | rcode = RCODE_TYPE_ERROR; |
659 | break; |
660 | } |
661 | } |
662 | read_unlock(&addr_space_lock); |
663 | return rcode; |
664 | } |
665 | |
666 | int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store, |
667 | u64 addr, octlet_t data, octlet_t arg, int ext_tcode, |
668 | u16 flags) |
669 | { |
670 | struct hpsb_address_serve *as; |
671 | int rcode = RCODE_ADDRESS_ERROR; |
672 | |
673 | read_lock(&addr_space_lock); |
674 | |
675 | list_for_each_entry(as, &host->addr_space, host_list) { |
676 | if (as->start > addr) |
677 | break; |
678 | |
679 | if (as->end > addr) { |
680 | if (as->op->lock64) |
681 | rcode = as->op->lock64(host, nodeid, store, |
682 | addr, data, arg, |
683 | ext_tcode, flags); |
684 | else |
685 | rcode = RCODE_TYPE_ERROR; |
686 | break; |
687 | } |
688 | } |
689 | read_unlock(&addr_space_lock); |
690 | return rcode; |
691 | } |
692 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
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jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
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jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9