Commit | Line | Data |
---|---|---|
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 | ||
1da177e4 LT |
49 | |
50 | static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl, | |
2c4b69bd | 51 | struct hpsb_host *host) |
1da177e4 LT |
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); | |
1da177e4 LT |
66 | return NULL; |
67 | } | |
68 | ||
afd6546d SR |
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 | */ | |
1da177e4 LT |
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 | ||
2c4b69bd | 79 | return hi ? hi->data : NULL; |
1da177e4 LT |
80 | } |
81 | ||
afd6546d SR |
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 | */ | |
1da177e4 LT |
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) { | |
2c4b69bd BC |
98 | HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already" |
99 | " exists", hl->name); | |
1da177e4 LT |
100 | return NULL; |
101 | } | |
102 | ||
8551158a | 103 | hi = kzalloc(sizeof(*hi) + data_size, GFP_ATOMIC); |
1da177e4 LT |
104 | if (!hi) |
105 | return NULL; | |
106 | ||
1da177e4 LT |
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 | ||
afd6546d SR |
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 | */ | |
1da177e4 LT |
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 | |
2c4b69bd BC |
138 | HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo " |
139 | "already has data", hl->name); | |
1da177e4 LT |
140 | } else |
141 | HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists", | |
142 | hl->name); | |
1da177e4 LT |
143 | return -EINVAL; |
144 | } | |
145 | ||
afd6546d SR |
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 | */ | |
1da177e4 LT |
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 | } | |
1da177e4 LT |
163 | return; |
164 | } | |
165 | ||
afd6546d SR |
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 | */ | |
2c4b69bd BC |
172 | void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, |
173 | unsigned long key) | |
1da177e4 LT |
174 | { |
175 | struct hl_host_info *hi; | |
176 | ||
177 | hi = hl_get_hostinfo(hl, host); | |
178 | if (hi) | |
179 | hi->key = key; | |
1da177e4 LT |
180 | return; |
181 | } | |
182 | ||
afd6546d SR |
183 | /** |
184 | * hpsb_get_hostinfo_bykey - retrieve a hostinfo pointer by its alternate key | |
185 | */ | |
1da177e4 LT |
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); | |
1da177e4 LT |
202 | return data; |
203 | } | |
204 | ||
1da177e4 LT |
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 | ||
2c4b69bd BC |
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); | |
1da177e4 LT |
214 | return 0; |
215 | } | |
216 | ||
afd6546d SR |
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 | */ | |
1da177e4 LT |
223 | void hpsb_register_highlevel(struct hpsb_highlevel *hl) |
224 | { | |
44515193 BC |
225 | unsigned long flags; |
226 | ||
055a7da0 | 227 | hpsb_init_highlevel(hl); |
2c4b69bd | 228 | INIT_LIST_HEAD(&hl->addr_list); |
1da177e4 LT |
229 | |
230 | down_write(&hl_drivers_sem); | |
2c4b69bd | 231 | list_add_tail(&hl->hl_list, &hl_drivers); |
1da177e4 LT |
232 | up_write(&hl_drivers_sem); |
233 | ||
44515193 | 234 | write_lock_irqsave(&hl_irqs_lock, flags); |
1da177e4 | 235 | list_add_tail(&hl->irq_list, &hl_irqs); |
44515193 | 236 | write_unlock_irqrestore(&hl_irqs_lock, flags); |
1da177e4 LT |
237 | |
238 | if (hl->add_host) | |
239 | nodemgr_for_each_host(hl, highlevel_for_each_host_reg); | |
2c4b69bd | 240 | return; |
1da177e4 LT |
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 | ||
2c4b69bd BC |
250 | static void __unregister_host(struct hpsb_highlevel *hl, struct hpsb_host *host, |
251 | int update_cr) | |
1da177e4 LT |
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); | |
1da177e4 LT |
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. */ | |
2c4b69bd BC |
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); | |
1da177e4 | 277 | |
2c4b69bd | 278 | /* Finally remove all the host info associated between these two. */ |
1da177e4 LT |
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); | |
1da177e4 LT |
287 | return 0; |
288 | } | |
289 | ||
afd6546d SR |
290 | /** |
291 | * hpsb_unregister_highlevel - unregister highlevel driver | |
292 | */ | |
1da177e4 LT |
293 | void hpsb_unregister_highlevel(struct hpsb_highlevel *hl) |
294 | { | |
44515193 BC |
295 | unsigned long flags; |
296 | ||
297 | write_lock_irqsave(&hl_irqs_lock, flags); | |
1da177e4 | 298 | list_del(&hl->irq_list); |
44515193 | 299 | write_unlock_irqrestore(&hl_irqs_lock, flags); |
1da177e4 LT |
300 | |
301 | down_write(&hl_drivers_sem); | |
2c4b69bd | 302 | list_del(&hl->hl_list); |
1da177e4 LT |
303 | up_write(&hl_drivers_sem); |
304 | ||
305 | nodemgr_for_each_host(hl, highlevel_for_each_host_unreg); | |
306 | } | |
307 | ||
afd6546d SR |
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 | */ | |
1da177e4 LT |
321 | u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl, |
322 | struct hpsb_host *host, | |
b17a5509 | 323 | const struct hpsb_address_ops *ops, |
1da177e4 LT |
324 | u64 size, u64 alignment, |
325 | u64 start, u64 end) | |
326 | { | |
327 | struct hpsb_address_serve *as, *a1, *a2; | |
328 | struct list_head *entry; | |
6737231e | 329 | u64 retval = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
330 | unsigned long flags; |
331 | u64 align_mask = ~(alignment - 1); | |
332 | ||
333 | if ((alignment & 3) || (alignment > 0x800000000000ULL) || | |
37d54111 | 334 | (hweight64(alignment) != 1)) { |
1da177e4 | 335 | HPSB_ERR("%s called with invalid alignment: 0x%048llx", |
b1ce1fd7 | 336 | __func__, (unsigned long long)alignment); |
1da177e4 LT |
337 | return retval; |
338 | } | |
339 | ||
8aef63ff BC |
340 | /* default range, |
341 | * avoids controller's posted write area (see OHCI 1.1 clause 1.5) */ | |
6737231e BC |
342 | if (start == CSR1212_INVALID_ADDR_SPACE && |
343 | end == CSR1212_INVALID_ADDR_SPACE) { | |
8aef63ff | 344 | start = host->middle_addr_space; |
6737231e | 345 | end = CSR1212_ALL_SPACE_END; |
1da177e4 LT |
346 | } |
347 | ||
2c4b69bd BC |
348 | if (((start|end) & ~align_mask) || (start >= end) || |
349 | (end > CSR1212_ALL_SPACE_END)) { | |
350 | HPSB_ERR("%s called with invalid addresses " | |
b1ce1fd7 | 351 | "(start = %012Lx end = %012Lx)", __func__, |
2c4b69bd | 352 | (unsigned long long)start,(unsigned long long)end); |
1da177e4 LT |
353 | return retval; |
354 | } | |
355 | ||
8551158a SR |
356 | as = kmalloc(sizeof(*as), GFP_KERNEL); |
357 | if (!as) | |
1da177e4 | 358 | return retval; |
1da177e4 LT |
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); | |
1da177e4 LT |
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); | |
2c4b69bd BC |
371 | a2 = list_entry(entry->next, struct hpsb_address_serve, |
372 | host_list); | |
1da177e4 LT |
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 | ||
2c4b69bd BC |
379 | if ((a2sa - a1ea >= size) && (a2sa - start >= size) && |
380 | (a2sa > start)) { | |
1da177e4 LT |
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 | } | |
1da177e4 LT |
389 | write_unlock_irqrestore(&addr_space_lock, flags); |
390 | ||
2c4b69bd | 391 | if (retval == CSR1212_INVALID_ADDR_SPACE) |
1da177e4 | 392 | kfree(as); |
1da177e4 LT |
393 | return retval; |
394 | } | |
395 | ||
afd6546d SR |
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 | */ | |
1da177e4 | 409 | int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, |
b17a5509 SR |
410 | const struct hpsb_address_ops *ops, |
411 | u64 start, u64 end) | |
1da177e4 | 412 | { |
2c4b69bd | 413 | struct hpsb_address_serve *as; |
1da177e4 | 414 | struct list_head *lh; |
2c4b69bd BC |
415 | int retval = 0; |
416 | unsigned long flags; | |
1da177e4 | 417 | |
2c4b69bd BC |
418 | if (((start|end) & 3) || (start >= end) || |
419 | (end > CSR1212_ALL_SPACE_END)) { | |
b1ce1fd7 | 420 | HPSB_ERR("%s called with invalid addresses", __func__); |
2c4b69bd BC |
421 | return 0; |
422 | } | |
1da177e4 | 423 | |
adb0a616 | 424 | as = kmalloc(sizeof(*as), GFP_KERNEL); |
8551158a SR |
425 | if (!as) |
426 | return 0; | |
1da177e4 | 427 | |
2c4b69bd BC |
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; | |
1da177e4 LT |
433 | as->host = host; |
434 | ||
435 | write_lock_irqsave(&addr_space_lock, flags); | |
1da177e4 LT |
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 = | |
2c4b69bd BC |
440 | list_entry(lh->next, struct hpsb_address_serve, |
441 | host_list); | |
1da177e4 LT |
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); | |
2c4b69bd | 457 | return retval; |
1da177e4 LT |
458 | } |
459 | ||
460 | int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, | |
2c4b69bd | 461 | u64 start) |
1da177e4 | 462 | { |
2c4b69bd BC |
463 | int retval = 0; |
464 | struct hpsb_address_serve *as; | |
465 | struct list_head *lh, *next; | |
466 | unsigned long flags; | |
1da177e4 | 467 | |
2c4b69bd | 468 | write_lock_irqsave(&addr_space_lock, flags); |
1da177e4 | 469 | list_for_each_safe (lh, next, &hl->addr_list) { |
2c4b69bd BC |
470 | as = list_entry(lh, struct hpsb_address_serve, hl_list); |
471 | if (as->start == start && as->host == host) { | |
1da177e4 | 472 | __delete_addr(as); |
2c4b69bd BC |
473 | retval = 1; |
474 | break; | |
475 | } | |
476 | } | |
477 | write_unlock_irqrestore(&addr_space_lock, flags); | |
478 | return retval; | |
1da177e4 LT |
479 | } |
480 | ||
1c4fb577 | 481 | static const struct hpsb_address_ops dummy_ops; |
e47c1feb SR |
482 | |
483 | /* dummy address spaces as lower and upper bounds of the host's a.s. list */ | |
1da177e4 LT |
484 | static void init_hpsb_highlevel(struct hpsb_host *host) |
485 | { | |
e47c1feb SR |
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); | |
1da177e4 | 490 | |
e47c1feb | 491 | host->dummy_zero_addr.op = host->dummy_max_addr.op = &dummy_ops; |
1da177e4 | 492 | |
e47c1feb SR |
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; | |
1da177e4 | 495 | |
e47c1feb SR |
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); | |
1da177e4 LT |
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 | } |