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Commit | Line | Data |
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1da177e4 LT |
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 | ||
1da177e4 LT |
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 | /* addr_space list will have zero and max already included as bounds */ | |
50 | static struct hpsb_address_ops dummy_ops = { NULL, NULL, NULL, NULL }; | |
51 | static struct hpsb_address_serve dummy_zero_addr, dummy_max_addr; | |
52 | ||
53 | ||
54 | static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl, | |
2c4b69bd | 55 | struct hpsb_host *host) |
1da177e4 LT |
56 | { |
57 | struct hl_host_info *hi = NULL; | |
58 | ||
59 | if (!hl || !host) | |
60 | return NULL; | |
61 | ||
62 | read_lock(&hl->host_info_lock); | |
63 | list_for_each_entry(hi, &hl->host_info_list, list) { | |
64 | if (hi->host == host) { | |
65 | read_unlock(&hl->host_info_lock); | |
66 | return hi; | |
67 | } | |
68 | } | |
69 | read_unlock(&hl->host_info_lock); | |
1da177e4 LT |
70 | return NULL; |
71 | } | |
72 | ||
afd6546d SR |
73 | /** |
74 | * hpsb_get_hostinfo - retrieve a hostinfo pointer bound to this driver/host | |
75 | * | |
76 | * Returns a per @host and @hl driver data structure that was previously stored | |
77 | * by hpsb_create_hostinfo. | |
78 | */ | |
1da177e4 LT |
79 | void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host) |
80 | { | |
81 | struct hl_host_info *hi = hl_get_hostinfo(hl, host); | |
82 | ||
2c4b69bd | 83 | return hi ? hi->data : NULL; |
1da177e4 LT |
84 | } |
85 | ||
afd6546d SR |
86 | /** |
87 | * hpsb_create_hostinfo - allocate a hostinfo pointer bound to this driver/host | |
88 | * | |
89 | * Allocate a hostinfo pointer backed by memory with @data_size and bind it to | |
90 | * to this @hl driver and @host. If @data_size is zero, then the return here is | |
91 | * only valid for error checking. | |
92 | */ | |
1da177e4 LT |
93 | void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, |
94 | size_t data_size) | |
95 | { | |
96 | struct hl_host_info *hi; | |
97 | void *data; | |
98 | unsigned long flags; | |
99 | ||
100 | hi = hl_get_hostinfo(hl, host); | |
101 | if (hi) { | |
2c4b69bd BC |
102 | HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already" |
103 | " exists", hl->name); | |
1da177e4 LT |
104 | return NULL; |
105 | } | |
106 | ||
8551158a | 107 | hi = kzalloc(sizeof(*hi) + data_size, GFP_ATOMIC); |
1da177e4 LT |
108 | if (!hi) |
109 | return NULL; | |
110 | ||
1da177e4 LT |
111 | if (data_size) { |
112 | data = hi->data = hi + 1; | |
113 | hi->size = data_size; | |
114 | } else | |
115 | data = hi; | |
116 | ||
117 | hi->host = host; | |
118 | ||
119 | write_lock_irqsave(&hl->host_info_lock, flags); | |
120 | list_add_tail(&hi->list, &hl->host_info_list); | |
121 | write_unlock_irqrestore(&hl->host_info_lock, flags); | |
122 | ||
123 | return data; | |
124 | } | |
125 | ||
afd6546d SR |
126 | /** |
127 | * hpsb_set_hostinfo - set the hostinfo pointer to something useful | |
128 | * | |
129 | * Usually follows a call to hpsb_create_hostinfo, where the size is 0. | |
130 | */ | |
1da177e4 LT |
131 | int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, |
132 | void *data) | |
133 | { | |
134 | struct hl_host_info *hi; | |
135 | ||
136 | hi = hl_get_hostinfo(hl, host); | |
137 | if (hi) { | |
138 | if (!hi->size && !hi->data) { | |
139 | hi->data = data; | |
140 | return 0; | |
141 | } else | |
2c4b69bd BC |
142 | HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo " |
143 | "already has data", hl->name); | |
1da177e4 LT |
144 | } else |
145 | HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists", | |
146 | hl->name); | |
1da177e4 LT |
147 | return -EINVAL; |
148 | } | |
149 | ||
afd6546d SR |
150 | /** |
151 | * hpsb_destroy_hostinfo - free and remove a hostinfo pointer | |
152 | * | |
153 | * Free and remove the hostinfo pointer bound to this @hl driver and @host. | |
154 | */ | |
1da177e4 LT |
155 | void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host) |
156 | { | |
157 | struct hl_host_info *hi; | |
158 | ||
159 | hi = hl_get_hostinfo(hl, host); | |
160 | if (hi) { | |
161 | unsigned long flags; | |
162 | write_lock_irqsave(&hl->host_info_lock, flags); | |
163 | list_del(&hi->list); | |
164 | write_unlock_irqrestore(&hl->host_info_lock, flags); | |
165 | kfree(hi); | |
166 | } | |
1da177e4 LT |
167 | return; |
168 | } | |
169 | ||
afd6546d SR |
170 | /** |
171 | * hpsb_set_hostinfo_key - set an alternate lookup key for an hostinfo | |
172 | * | |
173 | * Sets an alternate lookup key for the hostinfo bound to this @hl driver and | |
174 | * @host. | |
175 | */ | |
2c4b69bd BC |
176 | void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, |
177 | unsigned long key) | |
1da177e4 LT |
178 | { |
179 | struct hl_host_info *hi; | |
180 | ||
181 | hi = hl_get_hostinfo(hl, host); | |
182 | if (hi) | |
183 | hi->key = key; | |
1da177e4 LT |
184 | return; |
185 | } | |
186 | ||
afd6546d SR |
187 | /** |
188 | * hpsb_get_hostinfo_bykey - retrieve a hostinfo pointer by its alternate key | |
189 | */ | |
1da177e4 LT |
190 | void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key) |
191 | { | |
192 | struct hl_host_info *hi; | |
193 | void *data = NULL; | |
194 | ||
195 | if (!hl) | |
196 | return NULL; | |
197 | ||
198 | read_lock(&hl->host_info_lock); | |
199 | list_for_each_entry(hi, &hl->host_info_list, list) { | |
200 | if (hi->key == key) { | |
201 | data = hi->data; | |
202 | break; | |
203 | } | |
204 | } | |
205 | read_unlock(&hl->host_info_lock); | |
1da177e4 LT |
206 | return data; |
207 | } | |
208 | ||
1da177e4 LT |
209 | static int highlevel_for_each_host_reg(struct hpsb_host *host, void *__data) |
210 | { | |
211 | struct hpsb_highlevel *hl = __data; | |
212 | ||
213 | hl->add_host(host); | |
214 | ||
2c4b69bd BC |
215 | if (host->update_config_rom && hpsb_update_config_rom_image(host) < 0) |
216 | HPSB_ERR("Failed to generate Configuration ROM image for host " | |
217 | "%s-%d", hl->name, host->id); | |
1da177e4 LT |
218 | return 0; |
219 | } | |
220 | ||
afd6546d SR |
221 | /** |
222 | * hpsb_register_highlevel - register highlevel driver | |
223 | * | |
224 | * The name pointer in @hl has to stay valid at all times because the string is | |
225 | * not copied. | |
226 | */ | |
1da177e4 LT |
227 | void hpsb_register_highlevel(struct hpsb_highlevel *hl) |
228 | { | |
44515193 BC |
229 | unsigned long flags; |
230 | ||
055a7da0 | 231 | hpsb_init_highlevel(hl); |
2c4b69bd | 232 | INIT_LIST_HEAD(&hl->addr_list); |
1da177e4 LT |
233 | |
234 | down_write(&hl_drivers_sem); | |
2c4b69bd | 235 | list_add_tail(&hl->hl_list, &hl_drivers); |
1da177e4 LT |
236 | up_write(&hl_drivers_sem); |
237 | ||
44515193 | 238 | write_lock_irqsave(&hl_irqs_lock, flags); |
1da177e4 | 239 | list_add_tail(&hl->irq_list, &hl_irqs); |
44515193 | 240 | write_unlock_irqrestore(&hl_irqs_lock, flags); |
1da177e4 LT |
241 | |
242 | if (hl->add_host) | |
243 | nodemgr_for_each_host(hl, highlevel_for_each_host_reg); | |
2c4b69bd | 244 | return; |
1da177e4 LT |
245 | } |
246 | ||
247 | static void __delete_addr(struct hpsb_address_serve *as) | |
248 | { | |
249 | list_del(&as->host_list); | |
250 | list_del(&as->hl_list); | |
251 | kfree(as); | |
252 | } | |
253 | ||
2c4b69bd BC |
254 | static void __unregister_host(struct hpsb_highlevel *hl, struct hpsb_host *host, |
255 | int update_cr) | |
1da177e4 LT |
256 | { |
257 | unsigned long flags; | |
258 | struct list_head *lh, *next; | |
259 | struct hpsb_address_serve *as; | |
260 | ||
261 | /* First, let the highlevel driver unreg */ | |
262 | if (hl->remove_host) | |
263 | hl->remove_host(host); | |
264 | ||
265 | /* Remove any addresses that are matched for this highlevel driver | |
266 | * and this particular host. */ | |
267 | write_lock_irqsave(&addr_space_lock, flags); | |
268 | list_for_each_safe (lh, next, &hl->addr_list) { | |
269 | as = list_entry(lh, struct hpsb_address_serve, hl_list); | |
1da177e4 LT |
270 | if (as->host == host) |
271 | __delete_addr(as); | |
272 | } | |
273 | write_unlock_irqrestore(&addr_space_lock, flags); | |
274 | ||
275 | /* Now update the config-rom to reflect anything removed by the | |
276 | * highlevel driver. */ | |
2c4b69bd BC |
277 | if (update_cr && host->update_config_rom && |
278 | hpsb_update_config_rom_image(host) < 0) | |
279 | HPSB_ERR("Failed to generate Configuration ROM image for host " | |
280 | "%s-%d", hl->name, host->id); | |
1da177e4 | 281 | |
2c4b69bd | 282 | /* Finally remove all the host info associated between these two. */ |
1da177e4 LT |
283 | hpsb_destroy_hostinfo(hl, host); |
284 | } | |
285 | ||
286 | static int highlevel_for_each_host_unreg(struct hpsb_host *host, void *__data) | |
287 | { | |
288 | struct hpsb_highlevel *hl = __data; | |
289 | ||
290 | __unregister_host(hl, host, 1); | |
1da177e4 LT |
291 | return 0; |
292 | } | |
293 | ||
afd6546d SR |
294 | /** |
295 | * hpsb_unregister_highlevel - unregister highlevel driver | |
296 | */ | |
1da177e4 LT |
297 | void hpsb_unregister_highlevel(struct hpsb_highlevel *hl) |
298 | { | |
44515193 BC |
299 | unsigned long flags; |
300 | ||
301 | write_lock_irqsave(&hl_irqs_lock, flags); | |
1da177e4 | 302 | list_del(&hl->irq_list); |
44515193 | 303 | write_unlock_irqrestore(&hl_irqs_lock, flags); |
1da177e4 LT |
304 | |
305 | down_write(&hl_drivers_sem); | |
2c4b69bd | 306 | list_del(&hl->hl_list); |
1da177e4 LT |
307 | up_write(&hl_drivers_sem); |
308 | ||
309 | nodemgr_for_each_host(hl, highlevel_for_each_host_unreg); | |
310 | } | |
311 | ||
afd6546d SR |
312 | /** |
313 | * hpsb_allocate_and_register_addrspace - alloc' and reg' a host address space | |
314 | * | |
315 | * @start and @end are 48 bit pointers and have to be quadlet aligned. | |
316 | * @end points to the first address behind the handled addresses. This | |
317 | * function can be called multiple times for a single hpsb_highlevel @hl to | |
318 | * implement sparse register sets. The requested region must not overlap any | |
319 | * previously allocated region, otherwise registering will fail. | |
320 | * | |
321 | * It returns true for successful allocation. Address spaces can be | |
322 | * unregistered with hpsb_unregister_addrspace. All remaining address spaces | |
323 | * are automatically deallocated together with the hpsb_highlevel @hl. | |
324 | */ | |
1da177e4 LT |
325 | u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl, |
326 | struct hpsb_host *host, | |
327 | struct hpsb_address_ops *ops, | |
328 | u64 size, u64 alignment, | |
329 | u64 start, u64 end) | |
330 | { | |
331 | struct hpsb_address_serve *as, *a1, *a2; | |
332 | struct list_head *entry; | |
6737231e | 333 | u64 retval = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
334 | unsigned long flags; |
335 | u64 align_mask = ~(alignment - 1); | |
336 | ||
337 | if ((alignment & 3) || (alignment > 0x800000000000ULL) || | |
37d54111 | 338 | (hweight64(alignment) != 1)) { |
1da177e4 | 339 | HPSB_ERR("%s called with invalid alignment: 0x%048llx", |
b1ce1fd7 | 340 | __func__, (unsigned long long)alignment); |
1da177e4 LT |
341 | return retval; |
342 | } | |
343 | ||
8aef63ff BC |
344 | /* default range, |
345 | * avoids controller's posted write area (see OHCI 1.1 clause 1.5) */ | |
6737231e BC |
346 | if (start == CSR1212_INVALID_ADDR_SPACE && |
347 | end == CSR1212_INVALID_ADDR_SPACE) { | |
8aef63ff | 348 | start = host->middle_addr_space; |
6737231e | 349 | end = CSR1212_ALL_SPACE_END; |
1da177e4 LT |
350 | } |
351 | ||
2c4b69bd BC |
352 | if (((start|end) & ~align_mask) || (start >= end) || |
353 | (end > CSR1212_ALL_SPACE_END)) { | |
354 | HPSB_ERR("%s called with invalid addresses " | |
b1ce1fd7 | 355 | "(start = %012Lx end = %012Lx)", __func__, |
2c4b69bd | 356 | (unsigned long long)start,(unsigned long long)end); |
1da177e4 LT |
357 | return retval; |
358 | } | |
359 | ||
8551158a SR |
360 | as = kmalloc(sizeof(*as), GFP_KERNEL); |
361 | if (!as) | |
1da177e4 | 362 | return retval; |
1da177e4 LT |
363 | |
364 | INIT_LIST_HEAD(&as->host_list); | |
365 | INIT_LIST_HEAD(&as->hl_list); | |
366 | as->op = ops; | |
367 | as->host = host; | |
368 | ||
369 | write_lock_irqsave(&addr_space_lock, flags); | |
1da177e4 LT |
370 | list_for_each(entry, &host->addr_space) { |
371 | u64 a1sa, a1ea; | |
372 | u64 a2sa, a2ea; | |
373 | ||
374 | a1 = list_entry(entry, struct hpsb_address_serve, host_list); | |
2c4b69bd BC |
375 | a2 = list_entry(entry->next, struct hpsb_address_serve, |
376 | host_list); | |
1da177e4 LT |
377 | |
378 | a1sa = a1->start & align_mask; | |
379 | a1ea = (a1->end + alignment -1) & align_mask; | |
380 | a2sa = a2->start & align_mask; | |
381 | a2ea = (a2->end + alignment -1) & align_mask; | |
382 | ||
2c4b69bd BC |
383 | if ((a2sa - a1ea >= size) && (a2sa - start >= size) && |
384 | (a2sa > start)) { | |
1da177e4 LT |
385 | as->start = max(start, a1ea); |
386 | as->end = as->start + size; | |
387 | list_add(&as->host_list, entry); | |
388 | list_add_tail(&as->hl_list, &hl->addr_list); | |
389 | retval = as->start; | |
390 | break; | |
391 | } | |
392 | } | |
1da177e4 LT |
393 | write_unlock_irqrestore(&addr_space_lock, flags); |
394 | ||
2c4b69bd | 395 | if (retval == CSR1212_INVALID_ADDR_SPACE) |
1da177e4 | 396 | kfree(as); |
1da177e4 LT |
397 | return retval; |
398 | } | |
399 | ||
afd6546d SR |
400 | /** |
401 | * hpsb_register_addrspace - register a host address space | |
402 | * | |
403 | * @start and @end are 48 bit pointers and have to be quadlet aligned. | |
404 | * @end points to the first address behind the handled addresses. This | |
405 | * function can be called multiple times for a single hpsb_highlevel @hl to | |
406 | * implement sparse register sets. The requested region must not overlap any | |
407 | * previously allocated region, otherwise registering will fail. | |
408 | * | |
409 | * It returns true for successful allocation. Address spaces can be | |
410 | * unregistered with hpsb_unregister_addrspace. All remaining address spaces | |
411 | * are automatically deallocated together with the hpsb_highlevel @hl. | |
412 | */ | |
1da177e4 | 413 | int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, |
2c4b69bd | 414 | struct hpsb_address_ops *ops, u64 start, u64 end) |
1da177e4 | 415 | { |
2c4b69bd | 416 | struct hpsb_address_serve *as; |
1da177e4 | 417 | struct list_head *lh; |
2c4b69bd BC |
418 | int retval = 0; |
419 | unsigned long flags; | |
1da177e4 | 420 | |
2c4b69bd BC |
421 | if (((start|end) & 3) || (start >= end) || |
422 | (end > CSR1212_ALL_SPACE_END)) { | |
b1ce1fd7 | 423 | HPSB_ERR("%s called with invalid addresses", __func__); |
2c4b69bd BC |
424 | return 0; |
425 | } | |
1da177e4 | 426 | |
8551158a SR |
427 | as = kmalloc(sizeof(*as), GFP_ATOMIC); |
428 | if (!as) | |
429 | return 0; | |
1da177e4 | 430 | |
2c4b69bd BC |
431 | INIT_LIST_HEAD(&as->host_list); |
432 | INIT_LIST_HEAD(&as->hl_list); | |
433 | as->op = ops; | |
434 | as->start = start; | |
435 | as->end = end; | |
1da177e4 LT |
436 | as->host = host; |
437 | ||
438 | write_lock_irqsave(&addr_space_lock, flags); | |
1da177e4 LT |
439 | list_for_each(lh, &host->addr_space) { |
440 | struct hpsb_address_serve *as_this = | |
441 | list_entry(lh, struct hpsb_address_serve, host_list); | |
442 | struct hpsb_address_serve *as_next = | |
2c4b69bd BC |
443 | list_entry(lh->next, struct hpsb_address_serve, |
444 | host_list); | |
1da177e4 LT |
445 | |
446 | if (as_this->end > as->start) | |
447 | break; | |
448 | ||
449 | if (as_next->start >= as->end) { | |
450 | list_add(&as->host_list, lh); | |
451 | list_add_tail(&as->hl_list, &hl->addr_list); | |
452 | retval = 1; | |
453 | break; | |
454 | } | |
455 | } | |
456 | write_unlock_irqrestore(&addr_space_lock, flags); | |
457 | ||
458 | if (retval == 0) | |
459 | kfree(as); | |
2c4b69bd | 460 | return retval; |
1da177e4 LT |
461 | } |
462 | ||
463 | int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, | |
2c4b69bd | 464 | u64 start) |
1da177e4 | 465 | { |
2c4b69bd BC |
466 | int retval = 0; |
467 | struct hpsb_address_serve *as; | |
468 | struct list_head *lh, *next; | |
469 | unsigned long flags; | |
1da177e4 | 470 | |
2c4b69bd | 471 | write_lock_irqsave(&addr_space_lock, flags); |
1da177e4 | 472 | list_for_each_safe (lh, next, &hl->addr_list) { |
2c4b69bd BC |
473 | as = list_entry(lh, struct hpsb_address_serve, hl_list); |
474 | if (as->start == start && as->host == host) { | |
1da177e4 | 475 | __delete_addr(as); |
2c4b69bd BC |
476 | retval = 1; |
477 | break; | |
478 | } | |
479 | } | |
480 | write_unlock_irqrestore(&addr_space_lock, flags); | |
481 | return retval; | |
1da177e4 LT |
482 | } |
483 | ||
1da177e4 LT |
484 | static void init_hpsb_highlevel(struct hpsb_host *host) |
485 | { | |
486 | INIT_LIST_HEAD(&dummy_zero_addr.host_list); | |
487 | INIT_LIST_HEAD(&dummy_zero_addr.hl_list); | |
488 | INIT_LIST_HEAD(&dummy_max_addr.host_list); | |
489 | INIT_LIST_HEAD(&dummy_max_addr.hl_list); | |
490 | ||
491 | dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops; | |
492 | ||
493 | dummy_zero_addr.start = dummy_zero_addr.end = 0; | |
494 | dummy_max_addr.start = dummy_max_addr.end = ((u64) 1) << 48; | |
495 | ||
496 | list_add_tail(&dummy_zero_addr.host_list, &host->addr_space); | |
497 | list_add_tail(&dummy_max_addr.host_list, &host->addr_space); | |
498 | } | |
499 | ||
500 | void highlevel_add_host(struct hpsb_host *host) | |
501 | { | |
2c4b69bd | 502 | struct hpsb_highlevel *hl; |
1da177e4 LT |
503 | |
504 | init_hpsb_highlevel(host); | |
505 | ||
506 | down_read(&hl_drivers_sem); | |
2c4b69bd | 507 | list_for_each_entry(hl, &hl_drivers, hl_list) { |
1da177e4 LT |
508 | if (hl->add_host) |
509 | hl->add_host(host); | |
1da177e4 | 510 | } |
2c4b69bd BC |
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); | |
1da177e4 LT |
515 | } |
516 | ||
517 | void highlevel_remove_host(struct hpsb_host *host) | |
518 | { | |
2c4b69bd | 519 | struct hpsb_highlevel *hl; |
1da177e4 LT |
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 | { | |
44515193 | 529 | unsigned long flags; |
2c4b69bd | 530 | struct hpsb_highlevel *hl; |
1da177e4 | 531 | |
44515193 | 532 | read_lock_irqsave(&hl_irqs_lock, flags); |
1da177e4 | 533 | list_for_each_entry(hl, &hl_irqs, irq_list) { |
2c4b69bd BC |
534 | if (hl->host_reset) |
535 | hl->host_reset(host); | |
536 | } | |
44515193 | 537 | read_unlock_irqrestore(&hl_irqs_lock, flags); |
1da177e4 LT |
538 | } |
539 | ||
1da177e4 LT |
540 | void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction, |
541 | void *data, size_t length) | |
542 | { | |
44515193 | 543 | unsigned long flags; |
2c4b69bd BC |
544 | struct hpsb_highlevel *hl; |
545 | int cts = ((quadlet_t *)data)[0] >> 4; | |
1da177e4 | 546 | |
2c4b69bd | 547 | read_lock_irqsave(&hl_irqs_lock, flags); |
1da177e4 | 548 | list_for_each_entry(hl, &hl_irqs, irq_list) { |
2c4b69bd BC |
549 | if (hl->fcp_request) |
550 | hl->fcp_request(host, nodeid, direction, cts, data, | |
1da177e4 | 551 | length); |
2c4b69bd BC |
552 | } |
553 | read_unlock_irqrestore(&hl_irqs_lock, flags); | |
1da177e4 LT |
554 | } |
555 | ||
afd6546d SR |
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 | */ | |
2c4b69bd BC |
567 | int highlevel_read(struct hpsb_host *host, int nodeid, void *data, u64 addr, |
568 | unsigned int length, u16 flags) | |
1da177e4 | 569 | { |
2c4b69bd BC |
570 | struct hpsb_address_serve *as; |
571 | unsigned int partlength; | |
572 | int rcode = RCODE_ADDRESS_ERROR; | |
1da177e4 | 573 | |
2c4b69bd | 574 | read_lock(&addr_space_lock); |
1da177e4 LT |
575 | list_for_each_entry(as, &host->addr_space, host_list) { |
576 | if (as->start > addr) | |
577 | break; | |
578 | ||
2c4b69bd BC |
579 | if (as->end > addr) { |
580 | partlength = min(as->end - addr, (u64) length); | |
1da177e4 | 581 | |
2c4b69bd BC |
582 | if (as->op->read) |
583 | rcode = as->op->read(host, nodeid, data, | |
1da177e4 | 584 | addr, partlength, flags); |
2c4b69bd BC |
585 | else |
586 | rcode = RCODE_TYPE_ERROR; | |
1da177e4 LT |
587 | |
588 | data += partlength; | |
2c4b69bd BC |
589 | length -= partlength; |
590 | addr += partlength; | |
1da177e4 | 591 | |
2c4b69bd BC |
592 | if ((rcode != RCODE_COMPLETE) || !length) |
593 | break; | |
594 | } | |
595 | } | |
596 | read_unlock(&addr_space_lock); | |
1da177e4 | 597 | |
2c4b69bd BC |
598 | if (length && (rcode == RCODE_COMPLETE)) |
599 | rcode = RCODE_ADDRESS_ERROR; | |
600 | return rcode; | |
1da177e4 LT |
601 | } |
602 | ||
2c4b69bd BC |
603 | int highlevel_write(struct hpsb_host *host, int nodeid, int destid, void *data, |
604 | u64 addr, unsigned int length, u16 flags) | |
1da177e4 | 605 | { |
2c4b69bd BC |
606 | struct hpsb_address_serve *as; |
607 | unsigned int partlength; | |
608 | int rcode = RCODE_ADDRESS_ERROR; | |
1da177e4 | 609 | |
2c4b69bd | 610 | read_lock(&addr_space_lock); |
1da177e4 LT |
611 | list_for_each_entry(as, &host->addr_space, host_list) { |
612 | if (as->start > addr) | |
613 | break; | |
614 | ||
2c4b69bd BC |
615 | if (as->end > addr) { |
616 | partlength = min(as->end - addr, (u64) length); | |
1da177e4 | 617 | |
2c4b69bd BC |
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; | |
1da177e4 LT |
624 | |
625 | data += partlength; | |
2c4b69bd BC |
626 | length -= partlength; |
627 | addr += partlength; | |
1da177e4 | 628 | |
2c4b69bd BC |
629 | if ((rcode != RCODE_COMPLETE) || !length) |
630 | break; | |
631 | } | |
632 | } | |
633 | read_unlock(&addr_space_lock); | |
1da177e4 | 634 | |
2c4b69bd BC |
635 | if (length && (rcode == RCODE_COMPLETE)) |
636 | rcode = RCODE_ADDRESS_ERROR; | |
637 | return rcode; | |
1da177e4 LT |
638 | } |
639 | ||
1da177e4 | 640 | int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store, |
2c4b69bd BC |
641 | u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, |
642 | u16 flags) | |
1da177e4 | 643 | { |
2c4b69bd BC |
644 | struct hpsb_address_serve *as; |
645 | int rcode = RCODE_ADDRESS_ERROR; | |
1da177e4 | 646 | |
2c4b69bd | 647 | read_lock(&addr_space_lock); |
1da177e4 LT |
648 | list_for_each_entry(as, &host->addr_space, host_list) { |
649 | if (as->start > addr) | |
650 | break; | |
651 | ||
2c4b69bd BC |
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; | |
1da177e4 LT |
664 | } |
665 | ||
666 | int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store, | |
2c4b69bd BC |
667 | u64 addr, octlet_t data, octlet_t arg, int ext_tcode, |
668 | u16 flags) | |
1da177e4 | 669 | { |
2c4b69bd BC |
670 | struct hpsb_address_serve *as; |
671 | int rcode = RCODE_ADDRESS_ERROR; | |
1da177e4 | 672 | |
2c4b69bd | 673 | read_lock(&addr_space_lock); |
1da177e4 LT |
674 | |
675 | list_for_each_entry(as, &host->addr_space, host_list) { | |
676 | if (as->start > addr) | |
677 | break; | |
678 | ||
2c4b69bd BC |
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; | |
1da177e4 | 691 | } |