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1da177e4 LT |
1 | /* |
2 | * ACPI PCI HotPlug glue functions to ACPI CA subsystem | |
3 | * | |
4 | * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com) | |
5 | * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com) | |
6 | * Copyright (C) 2002,2003 NEC Corporation | |
7 | * | |
8 | * All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
18 | * NON INFRINGEMENT. See the GNU General Public License for more | |
19 | * details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | * | |
25 | * Send feedback to <t-kochi@bq.jp.nec.com> | |
26 | * | |
27 | */ | |
28 | ||
29 | #include <linux/init.h> | |
30 | #include <linux/module.h> | |
31 | ||
32 | #include <linux/kernel.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <asm/semaphore.h> | |
36 | ||
37 | #include "../pci.h" | |
38 | #include "pci_hotplug.h" | |
39 | #include "acpiphp.h" | |
40 | ||
41 | static LIST_HEAD(bridge_list); | |
42 | ||
43 | #define MY_NAME "acpiphp_glue" | |
44 | ||
45 | static void handle_hotplug_event_bridge (acpi_handle, u32, void *); | |
46 | static void handle_hotplug_event_func (acpi_handle, u32, void *); | |
47 | ||
48 | /* | |
49 | * initialization & terminatation routines | |
50 | */ | |
51 | ||
52 | /** | |
53 | * is_ejectable - determine if a slot is ejectable | |
54 | * @handle: handle to acpi namespace | |
55 | * | |
56 | * Ejectable slot should satisfy at least these conditions: | |
57 | * | |
58 | * 1. has _ADR method | |
59 | * 2. has _EJ0 method | |
60 | * | |
61 | * optionally | |
62 | * | |
63 | * 1. has _STA method | |
64 | * 2. has _PS0 method | |
65 | * 3. has _PS3 method | |
66 | * 4. .. | |
67 | * | |
68 | */ | |
69 | static int is_ejectable(acpi_handle handle) | |
70 | { | |
71 | acpi_status status; | |
72 | acpi_handle tmp; | |
73 | ||
74 | status = acpi_get_handle(handle, "_ADR", &tmp); | |
75 | if (ACPI_FAILURE(status)) { | |
76 | return 0; | |
77 | } | |
78 | ||
79 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
80 | if (ACPI_FAILURE(status)) { | |
81 | return 0; | |
82 | } | |
83 | ||
84 | return 1; | |
85 | } | |
86 | ||
87 | ||
88 | /* callback routine to check the existence of ejectable slots */ | |
89 | static acpi_status | |
90 | is_ejectable_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
91 | { | |
92 | int *count = (int *)context; | |
93 | ||
94 | if (is_ejectable(handle)) { | |
95 | (*count)++; | |
96 | /* only one ejectable slot is enough */ | |
97 | return AE_CTRL_TERMINATE; | |
98 | } else { | |
99 | return AE_OK; | |
100 | } | |
101 | } | |
102 | ||
103 | ||
104 | /* callback routine to register each ACPI PCI slot object */ | |
105 | static acpi_status | |
106 | register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
107 | { | |
108 | struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; | |
109 | struct acpiphp_slot *slot; | |
110 | struct acpiphp_func *newfunc; | |
111 | acpi_handle tmp; | |
112 | acpi_status status = AE_OK; | |
113 | unsigned long adr, sun; | |
114 | int device, function; | |
115 | static int num_slots = 0; /* XXX if we support I/O node hotplug... */ | |
116 | ||
117 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); | |
118 | ||
119 | if (ACPI_FAILURE(status)) | |
120 | return AE_OK; | |
121 | ||
122 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
123 | ||
124 | if (ACPI_FAILURE(status)) | |
125 | return AE_OK; | |
126 | ||
127 | device = (adr >> 16) & 0xffff; | |
128 | function = adr & 0xffff; | |
129 | ||
130 | newfunc = kmalloc(sizeof(struct acpiphp_func), GFP_KERNEL); | |
131 | if (!newfunc) | |
132 | return AE_NO_MEMORY; | |
133 | memset(newfunc, 0, sizeof(struct acpiphp_func)); | |
134 | ||
135 | INIT_LIST_HEAD(&newfunc->sibling); | |
136 | newfunc->handle = handle; | |
137 | newfunc->function = function; | |
138 | newfunc->flags = FUNC_HAS_EJ0; | |
139 | ||
140 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) | |
141 | newfunc->flags |= FUNC_HAS_STA; | |
142 | ||
143 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp))) | |
144 | newfunc->flags |= FUNC_HAS_PS0; | |
145 | ||
146 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) | |
147 | newfunc->flags |= FUNC_HAS_PS3; | |
148 | ||
149 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); | |
150 | if (ACPI_FAILURE(status)) | |
151 | sun = -1; | |
152 | ||
153 | /* search for objects that share the same slot */ | |
154 | for (slot = bridge->slots; slot; slot = slot->next) | |
155 | if (slot->device == device) { | |
156 | if (slot->sun != sun) | |
157 | warn("sibling found, but _SUN doesn't match!\n"); | |
158 | break; | |
159 | } | |
160 | ||
161 | if (!slot) { | |
162 | slot = kmalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); | |
163 | if (!slot) { | |
164 | kfree(newfunc); | |
165 | return AE_NO_MEMORY; | |
166 | } | |
167 | ||
168 | memset(slot, 0, sizeof(struct acpiphp_slot)); | |
169 | slot->bridge = bridge; | |
170 | slot->id = num_slots++; | |
171 | slot->device = device; | |
172 | slot->sun = sun; | |
173 | INIT_LIST_HEAD(&slot->funcs); | |
174 | init_MUTEX(&slot->crit_sect); | |
175 | ||
176 | slot->next = bridge->slots; | |
177 | bridge->slots = slot; | |
178 | ||
179 | bridge->nr_slots++; | |
180 | ||
181 | dbg("found ACPI PCI Hotplug slot at PCI %02x:%02x Slot:%d\n", | |
182 | slot->bridge->bus, slot->device, slot->sun); | |
183 | } | |
184 | ||
185 | newfunc->slot = slot; | |
186 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
187 | ||
188 | /* associate corresponding pci_dev */ | |
189 | newfunc->pci_dev = pci_find_slot(bridge->bus, | |
190 | PCI_DEVFN(device, function)); | |
191 | if (newfunc->pci_dev) { | |
192 | if (acpiphp_init_func_resource(newfunc) < 0) { | |
193 | kfree(newfunc); | |
194 | return AE_ERROR; | |
195 | } | |
196 | slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); | |
197 | } | |
198 | ||
199 | /* install notify handler */ | |
200 | status = acpi_install_notify_handler(handle, | |
201 | ACPI_SYSTEM_NOTIFY, | |
202 | handle_hotplug_event_func, | |
203 | newfunc); | |
204 | ||
205 | if (ACPI_FAILURE(status)) { | |
206 | err("failed to register interrupt notify handler\n"); | |
207 | return status; | |
208 | } | |
209 | ||
210 | return AE_OK; | |
211 | } | |
212 | ||
213 | ||
214 | /* see if it's worth looking at this bridge */ | |
215 | static int detect_ejectable_slots(acpi_handle *bridge_handle) | |
216 | { | |
217 | acpi_status status; | |
218 | int count; | |
219 | ||
220 | count = 0; | |
221 | ||
222 | /* only check slots defined directly below bridge object */ | |
223 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1, | |
224 | is_ejectable_slot, (void *)&count, NULL); | |
225 | ||
226 | return count; | |
227 | } | |
228 | ||
229 | ||
230 | /* decode ACPI _CRS data and convert into our internal resource list | |
231 | * TBD: _TRA, etc. | |
232 | */ | |
233 | static acpi_status | |
234 | decode_acpi_resource(struct acpi_resource *resource, void *context) | |
235 | { | |
236 | struct acpiphp_bridge *bridge = (struct acpiphp_bridge *) context; | |
237 | struct acpi_resource_address64 address; | |
238 | struct pci_resource *res; | |
239 | ||
240 | if (resource->id != ACPI_RSTYPE_ADDRESS16 && | |
241 | resource->id != ACPI_RSTYPE_ADDRESS32 && | |
242 | resource->id != ACPI_RSTYPE_ADDRESS64) | |
243 | return AE_OK; | |
244 | ||
245 | acpi_resource_to_address64(resource, &address); | |
246 | ||
247 | if (address.producer_consumer == ACPI_PRODUCER && address.address_length > 0) { | |
248 | dbg("resource type: %d: 0x%llx - 0x%llx\n", address.resource_type, | |
249 | (unsigned long long)address.min_address_range, | |
250 | (unsigned long long)address.max_address_range); | |
251 | res = acpiphp_make_resource(address.min_address_range, | |
252 | address.address_length); | |
253 | if (!res) { | |
254 | err("out of memory\n"); | |
255 | return AE_OK; | |
256 | } | |
257 | ||
258 | switch (address.resource_type) { | |
259 | case ACPI_MEMORY_RANGE: | |
260 | if (address.attribute.memory.cache_attribute == ACPI_PREFETCHABLE_MEMORY) { | |
261 | res->next = bridge->p_mem_head; | |
262 | bridge->p_mem_head = res; | |
263 | } else { | |
264 | res->next = bridge->mem_head; | |
265 | bridge->mem_head = res; | |
266 | } | |
267 | break; | |
268 | case ACPI_IO_RANGE: | |
269 | res->next = bridge->io_head; | |
270 | bridge->io_head = res; | |
271 | break; | |
272 | case ACPI_BUS_NUMBER_RANGE: | |
273 | res->next = bridge->bus_head; | |
274 | bridge->bus_head = res; | |
275 | break; | |
276 | default: | |
277 | /* invalid type */ | |
278 | kfree(res); | |
279 | break; | |
280 | } | |
281 | } | |
282 | ||
283 | return AE_OK; | |
284 | } | |
285 | ||
286 | /* decode ACPI 2.0 _HPP hot plug parameters */ | |
287 | static void decode_hpp(struct acpiphp_bridge *bridge) | |
288 | { | |
289 | acpi_status status; | |
290 | struct acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER, | |
291 | .pointer = NULL}; | |
292 | union acpi_object *package; | |
293 | int i; | |
294 | ||
295 | /* default numbers */ | |
296 | bridge->hpp.cache_line_size = 0x10; | |
297 | bridge->hpp.latency_timer = 0x40; | |
298 | bridge->hpp.enable_SERR = 0; | |
299 | bridge->hpp.enable_PERR = 0; | |
300 | ||
301 | status = acpi_evaluate_object(bridge->handle, "_HPP", NULL, &buffer); | |
302 | ||
303 | if (ACPI_FAILURE(status)) { | |
304 | dbg("_HPP evaluation failed\n"); | |
305 | return; | |
306 | } | |
307 | ||
308 | package = (union acpi_object *) buffer.pointer; | |
309 | ||
310 | if (!package || package->type != ACPI_TYPE_PACKAGE || | |
311 | package->package.count != 4 || !package->package.elements) { | |
312 | err("invalid _HPP object; ignoring\n"); | |
313 | goto err_exit; | |
314 | } | |
315 | ||
316 | for (i = 0; i < 4; i++) { | |
317 | if (package->package.elements[i].type != ACPI_TYPE_INTEGER) { | |
318 | err("invalid _HPP parameter type; ignoring\n"); | |
319 | goto err_exit; | |
320 | } | |
321 | } | |
322 | ||
323 | bridge->hpp.cache_line_size = package->package.elements[0].integer.value; | |
324 | bridge->hpp.latency_timer = package->package.elements[1].integer.value; | |
325 | bridge->hpp.enable_SERR = package->package.elements[2].integer.value; | |
326 | bridge->hpp.enable_PERR = package->package.elements[3].integer.value; | |
327 | ||
328 | dbg("_HPP parameter = (%02x, %02x, %02x, %02x)\n", | |
329 | bridge->hpp.cache_line_size, | |
330 | bridge->hpp.latency_timer, | |
331 | bridge->hpp.enable_SERR, | |
332 | bridge->hpp.enable_PERR); | |
333 | ||
334 | bridge->flags |= BRIDGE_HAS_HPP; | |
335 | ||
336 | err_exit: | |
337 | kfree(buffer.pointer); | |
338 | } | |
339 | ||
340 | ||
341 | /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ | |
342 | static void init_bridge_misc(struct acpiphp_bridge *bridge) | |
343 | { | |
344 | acpi_status status; | |
345 | ||
346 | /* decode ACPI 2.0 _HPP (hot plug parameters) */ | |
347 | decode_hpp(bridge); | |
348 | ||
349 | /* subtract all resources already allocated */ | |
350 | acpiphp_detect_pci_resource(bridge); | |
351 | ||
352 | /* register all slot objects under this bridge */ | |
353 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, | |
354 | register_slot, bridge, NULL); | |
355 | ||
356 | /* install notify handler */ | |
357 | status = acpi_install_notify_handler(bridge->handle, | |
358 | ACPI_SYSTEM_NOTIFY, | |
359 | handle_hotplug_event_bridge, | |
360 | bridge); | |
361 | ||
362 | if (ACPI_FAILURE(status)) { | |
363 | err("failed to register interrupt notify handler\n"); | |
364 | } | |
365 | ||
366 | list_add(&bridge->list, &bridge_list); | |
367 | ||
368 | dbg("Bridge resource:\n"); | |
369 | acpiphp_dump_resource(bridge); | |
370 | } | |
371 | ||
372 | ||
373 | /* allocate and initialize host bridge data structure */ | |
374 | static void add_host_bridge(acpi_handle *handle, int seg, int bus) | |
375 | { | |
376 | acpi_status status; | |
377 | struct acpiphp_bridge *bridge; | |
378 | ||
379 | bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); | |
380 | if (bridge == NULL) | |
381 | return; | |
382 | ||
383 | memset(bridge, 0, sizeof(struct acpiphp_bridge)); | |
384 | ||
385 | bridge->type = BRIDGE_TYPE_HOST; | |
386 | bridge->handle = handle; | |
387 | bridge->seg = seg; | |
388 | bridge->bus = bus; | |
389 | ||
390 | bridge->pci_bus = pci_find_bus(seg, bus); | |
391 | ||
392 | spin_lock_init(&bridge->res_lock); | |
393 | ||
394 | /* to be overridden when we decode _CRS */ | |
395 | bridge->sub = bridge->bus; | |
396 | ||
397 | /* decode resources */ | |
398 | ||
399 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, | |
400 | decode_acpi_resource, bridge); | |
401 | ||
402 | if (ACPI_FAILURE(status)) { | |
403 | err("failed to decode bridge resources\n"); | |
404 | kfree(bridge); | |
405 | return; | |
406 | } | |
407 | ||
408 | acpiphp_resource_sort_and_combine(&bridge->io_head); | |
409 | acpiphp_resource_sort_and_combine(&bridge->mem_head); | |
410 | acpiphp_resource_sort_and_combine(&bridge->p_mem_head); | |
411 | acpiphp_resource_sort_and_combine(&bridge->bus_head); | |
412 | ||
413 | dbg("ACPI _CRS resource:\n"); | |
414 | acpiphp_dump_resource(bridge); | |
415 | ||
416 | if (bridge->bus_head) { | |
417 | bridge->bus = bridge->bus_head->base; | |
418 | bridge->sub = bridge->bus_head->base + bridge->bus_head->length - 1; | |
419 | } | |
420 | ||
421 | init_bridge_misc(bridge); | |
422 | } | |
423 | ||
424 | ||
425 | /* allocate and initialize PCI-to-PCI bridge data structure */ | |
426 | static void add_p2p_bridge(acpi_handle *handle, int seg, int bus, int dev, int fn) | |
427 | { | |
428 | struct acpiphp_bridge *bridge; | |
429 | u8 tmp8; | |
430 | u16 tmp16; | |
431 | u64 base64, limit64; | |
432 | u32 base, limit, base32u, limit32u; | |
433 | ||
434 | bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); | |
435 | if (bridge == NULL) { | |
436 | err("out of memory\n"); | |
437 | return; | |
438 | } | |
439 | ||
440 | memset(bridge, 0, sizeof(struct acpiphp_bridge)); | |
441 | ||
442 | bridge->type = BRIDGE_TYPE_P2P; | |
443 | bridge->handle = handle; | |
444 | bridge->seg = seg; | |
445 | ||
446 | bridge->pci_dev = pci_find_slot(bus, PCI_DEVFN(dev, fn)); | |
447 | if (!bridge->pci_dev) { | |
448 | err("Can't get pci_dev\n"); | |
449 | kfree(bridge); | |
450 | return; | |
451 | } | |
452 | ||
453 | bridge->pci_bus = bridge->pci_dev->subordinate; | |
454 | if (!bridge->pci_bus) { | |
455 | err("This is not a PCI-to-PCI bridge!\n"); | |
456 | kfree(bridge); | |
457 | return; | |
458 | } | |
459 | ||
460 | spin_lock_init(&bridge->res_lock); | |
461 | ||
462 | bridge->bus = bridge->pci_bus->number; | |
463 | bridge->sub = bridge->pci_bus->subordinate; | |
464 | ||
465 | /* | |
466 | * decode resources under this P2P bridge | |
467 | */ | |
468 | ||
469 | /* I/O resources */ | |
470 | pci_read_config_byte(bridge->pci_dev, PCI_IO_BASE, &tmp8); | |
471 | base = tmp8; | |
472 | pci_read_config_byte(bridge->pci_dev, PCI_IO_LIMIT, &tmp8); | |
473 | limit = tmp8; | |
474 | ||
475 | switch (base & PCI_IO_RANGE_TYPE_MASK) { | |
476 | case PCI_IO_RANGE_TYPE_16: | |
477 | base = (base << 8) & 0xf000; | |
478 | limit = ((limit << 8) & 0xf000) + 0xfff; | |
479 | bridge->io_head = acpiphp_make_resource((u64)base, limit - base + 1); | |
480 | if (!bridge->io_head) { | |
481 | err("out of memory\n"); | |
482 | kfree(bridge); | |
483 | return; | |
484 | } | |
485 | dbg("16bit I/O range: %04x-%04x\n", | |
486 | (u32)bridge->io_head->base, | |
487 | (u32)(bridge->io_head->base + bridge->io_head->length - 1)); | |
488 | break; | |
489 | case PCI_IO_RANGE_TYPE_32: | |
490 | pci_read_config_word(bridge->pci_dev, PCI_IO_BASE_UPPER16, &tmp16); | |
491 | base = ((u32)tmp16 << 16) | ((base << 8) & 0xf000); | |
492 | pci_read_config_word(bridge->pci_dev, PCI_IO_LIMIT_UPPER16, &tmp16); | |
493 | limit = (((u32)tmp16 << 16) | ((limit << 8) & 0xf000)) + 0xfff; | |
494 | bridge->io_head = acpiphp_make_resource((u64)base, limit - base + 1); | |
495 | if (!bridge->io_head) { | |
496 | err("out of memory\n"); | |
497 | kfree(bridge); | |
498 | return; | |
499 | } | |
500 | dbg("32bit I/O range: %08x-%08x\n", | |
501 | (u32)bridge->io_head->base, | |
502 | (u32)(bridge->io_head->base + bridge->io_head->length - 1)); | |
503 | break; | |
504 | case 0x0f: | |
505 | dbg("I/O space unsupported\n"); | |
506 | break; | |
507 | default: | |
508 | warn("Unknown I/O range type\n"); | |
509 | } | |
510 | ||
511 | /* Memory resources (mandatory for P2P bridge) */ | |
512 | pci_read_config_word(bridge->pci_dev, PCI_MEMORY_BASE, &tmp16); | |
513 | base = (tmp16 & 0xfff0) << 16; | |
514 | pci_read_config_word(bridge->pci_dev, PCI_MEMORY_LIMIT, &tmp16); | |
515 | limit = ((tmp16 & 0xfff0) << 16) | 0xfffff; | |
516 | bridge->mem_head = acpiphp_make_resource((u64)base, limit - base + 1); | |
517 | if (!bridge->mem_head) { | |
518 | err("out of memory\n"); | |
519 | kfree(bridge); | |
520 | return; | |
521 | } | |
522 | dbg("32bit Memory range: %08x-%08x\n", | |
523 | (u32)bridge->mem_head->base, | |
524 | (u32)(bridge->mem_head->base + bridge->mem_head->length-1)); | |
525 | ||
526 | /* Prefetchable Memory resources (optional) */ | |
527 | pci_read_config_word(bridge->pci_dev, PCI_PREF_MEMORY_BASE, &tmp16); | |
528 | base = tmp16; | |
529 | pci_read_config_word(bridge->pci_dev, PCI_PREF_MEMORY_LIMIT, &tmp16); | |
530 | limit = tmp16; | |
531 | ||
532 | switch (base & PCI_MEMORY_RANGE_TYPE_MASK) { | |
533 | case PCI_PREF_RANGE_TYPE_32: | |
534 | base = (base & 0xfff0) << 16; | |
535 | limit = ((limit & 0xfff0) << 16) | 0xfffff; | |
536 | bridge->p_mem_head = acpiphp_make_resource((u64)base, limit - base + 1); | |
537 | if (!bridge->p_mem_head) { | |
538 | err("out of memory\n"); | |
539 | kfree(bridge); | |
540 | return; | |
541 | } | |
542 | dbg("32bit Prefetchable memory range: %08x-%08x\n", | |
543 | (u32)bridge->p_mem_head->base, | |
544 | (u32)(bridge->p_mem_head->base + bridge->p_mem_head->length - 1)); | |
545 | break; | |
546 | case PCI_PREF_RANGE_TYPE_64: | |
547 | pci_read_config_dword(bridge->pci_dev, PCI_PREF_BASE_UPPER32, &base32u); | |
548 | pci_read_config_dword(bridge->pci_dev, PCI_PREF_LIMIT_UPPER32, &limit32u); | |
549 | base64 = ((u64)base32u << 32) | ((base & 0xfff0) << 16); | |
550 | limit64 = (((u64)limit32u << 32) | ((limit & 0xfff0) << 16)) + 0xfffff; | |
551 | ||
552 | bridge->p_mem_head = acpiphp_make_resource(base64, limit64 - base64 + 1); | |
553 | if (!bridge->p_mem_head) { | |
554 | err("out of memory\n"); | |
555 | kfree(bridge); | |
556 | return; | |
557 | } | |
558 | dbg("64bit Prefetchable memory range: %08x%08x-%08x%08x\n", | |
559 | (u32)(bridge->p_mem_head->base >> 32), | |
560 | (u32)(bridge->p_mem_head->base & 0xffffffff), | |
561 | (u32)((bridge->p_mem_head->base + bridge->p_mem_head->length - 1) >> 32), | |
562 | (u32)((bridge->p_mem_head->base + bridge->p_mem_head->length - 1) & 0xffffffff)); | |
563 | break; | |
564 | case 0x0f: | |
565 | break; | |
566 | default: | |
567 | warn("Unknown prefetchale memory type\n"); | |
568 | } | |
569 | ||
570 | init_bridge_misc(bridge); | |
571 | } | |
572 | ||
573 | ||
574 | /* callback routine to find P2P bridges */ | |
575 | static acpi_status | |
576 | find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
577 | { | |
578 | acpi_status status; | |
579 | acpi_handle dummy_handle; | |
580 | unsigned long *segbus = context; | |
581 | unsigned long tmp; | |
582 | int seg, bus, device, function; | |
583 | struct pci_dev *dev; | |
584 | ||
585 | /* get PCI address */ | |
586 | seg = (*segbus >> 8) & 0xff; | |
587 | bus = *segbus & 0xff; | |
588 | ||
589 | status = acpi_get_handle(handle, "_ADR", &dummy_handle); | |
590 | if (ACPI_FAILURE(status)) | |
591 | return AE_OK; /* continue */ | |
592 | ||
593 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp); | |
594 | if (ACPI_FAILURE(status)) { | |
595 | dbg("%s: _ADR evaluation failure\n", __FUNCTION__); | |
596 | return AE_OK; | |
597 | } | |
598 | ||
599 | device = (tmp >> 16) & 0xffff; | |
600 | function = tmp & 0xffff; | |
601 | ||
602 | dev = pci_find_slot(bus, PCI_DEVFN(device, function)); | |
603 | ||
604 | if (!dev) | |
605 | return AE_OK; | |
606 | ||
607 | if (!dev->subordinate) | |
608 | return AE_OK; | |
609 | ||
610 | /* check if this bridge has ejectable slots */ | |
611 | if (detect_ejectable_slots(handle) > 0) { | |
612 | dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); | |
613 | add_p2p_bridge(handle, seg, bus, device, function); | |
614 | } | |
615 | ||
616 | return AE_OK; | |
617 | } | |
618 | ||
619 | ||
620 | /* find hot-pluggable slots, and then find P2P bridge */ | |
621 | static int add_bridge(acpi_handle handle) | |
622 | { | |
623 | acpi_status status; | |
624 | unsigned long tmp; | |
625 | int seg, bus; | |
626 | acpi_handle dummy_handle; | |
627 | ||
628 | /* if the bridge doesn't have _STA, we assume it is always there */ | |
629 | status = acpi_get_handle(handle, "_STA", &dummy_handle); | |
630 | if (ACPI_SUCCESS(status)) { | |
631 | status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); | |
632 | if (ACPI_FAILURE(status)) { | |
633 | dbg("%s: _STA evaluation failure\n", __FUNCTION__); | |
634 | return 0; | |
635 | } | |
636 | if ((tmp & ACPI_STA_FUNCTIONING) == 0) | |
637 | /* don't register this object */ | |
638 | return 0; | |
639 | } | |
640 | ||
641 | /* get PCI segment number */ | |
642 | status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp); | |
643 | ||
644 | seg = ACPI_SUCCESS(status) ? tmp : 0; | |
645 | ||
646 | /* get PCI bus number */ | |
647 | status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp); | |
648 | ||
649 | if (ACPI_SUCCESS(status)) { | |
650 | bus = tmp; | |
651 | } else { | |
652 | warn("can't get bus number, assuming 0\n"); | |
653 | bus = 0; | |
654 | } | |
655 | ||
656 | /* check if this bridge has ejectable slots */ | |
657 | if (detect_ejectable_slots(handle) > 0) { | |
658 | dbg("found PCI host-bus bridge with hot-pluggable slots\n"); | |
659 | add_host_bridge(handle, seg, bus); | |
660 | return 0; | |
661 | } | |
662 | ||
663 | tmp = seg << 8 | bus; | |
664 | ||
665 | /* search P2P bridges under this host bridge */ | |
666 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
667 | find_p2p_bridge, &tmp, NULL); | |
668 | ||
669 | if (ACPI_FAILURE(status)) | |
670 | warn("find_p2p_bridge faied (error code = 0x%x)\n",status); | |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
675 | ||
676 | static void remove_bridge(acpi_handle handle) | |
677 | { | |
678 | /* No-op for now .. */ | |
679 | } | |
680 | ||
681 | ||
682 | static int power_on_slot(struct acpiphp_slot *slot) | |
683 | { | |
684 | acpi_status status; | |
685 | struct acpiphp_func *func; | |
686 | struct list_head *l; | |
687 | int retval = 0; | |
688 | ||
689 | /* if already enabled, just skip */ | |
690 | if (slot->flags & SLOT_POWEREDON) | |
691 | goto err_exit; | |
692 | ||
693 | list_for_each (l, &slot->funcs) { | |
694 | func = list_entry(l, struct acpiphp_func, sibling); | |
695 | ||
696 | if (func->flags & FUNC_HAS_PS0) { | |
697 | dbg("%s: executing _PS0\n", __FUNCTION__); | |
698 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); | |
699 | if (ACPI_FAILURE(status)) { | |
700 | warn("%s: _PS0 failed\n", __FUNCTION__); | |
701 | retval = -1; | |
702 | goto err_exit; | |
703 | } else | |
704 | break; | |
705 | } | |
706 | } | |
707 | ||
708 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
709 | ||
710 | slot->flags |= SLOT_POWEREDON; | |
711 | ||
712 | err_exit: | |
713 | return retval; | |
714 | } | |
715 | ||
716 | ||
717 | static int power_off_slot(struct acpiphp_slot *slot) | |
718 | { | |
719 | acpi_status status; | |
720 | struct acpiphp_func *func; | |
721 | struct list_head *l; | |
722 | struct acpi_object_list arg_list; | |
723 | union acpi_object arg; | |
724 | ||
725 | int retval = 0; | |
726 | ||
727 | /* if already disabled, just skip */ | |
728 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
729 | goto err_exit; | |
730 | ||
731 | list_for_each (l, &slot->funcs) { | |
732 | func = list_entry(l, struct acpiphp_func, sibling); | |
733 | ||
734 | if (func->pci_dev && (func->flags & FUNC_HAS_PS3)) { | |
735 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); | |
736 | if (ACPI_FAILURE(status)) { | |
737 | warn("%s: _PS3 failed\n", __FUNCTION__); | |
738 | retval = -1; | |
739 | goto err_exit; | |
740 | } else | |
741 | break; | |
742 | } | |
743 | } | |
744 | ||
745 | list_for_each (l, &slot->funcs) { | |
746 | func = list_entry(l, struct acpiphp_func, sibling); | |
747 | ||
748 | /* We don't want to call _EJ0 on non-existing functions. */ | |
749 | if (func->pci_dev && (func->flags & FUNC_HAS_EJ0)) { | |
750 | /* _EJ0 method take one argument */ | |
751 | arg_list.count = 1; | |
752 | arg_list.pointer = &arg; | |
753 | arg.type = ACPI_TYPE_INTEGER; | |
754 | arg.integer.value = 1; | |
755 | ||
756 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
757 | if (ACPI_FAILURE(status)) { | |
758 | warn("%s: _EJ0 failed\n", __FUNCTION__); | |
759 | retval = -1; | |
760 | goto err_exit; | |
761 | } else | |
762 | break; | |
763 | } | |
764 | } | |
765 | ||
766 | /* TBD: evaluate _STA to check if the slot is disabled */ | |
767 | ||
768 | slot->flags &= (~SLOT_POWEREDON); | |
769 | ||
770 | err_exit: | |
771 | return retval; | |
772 | } | |
773 | ||
774 | ||
775 | /** | |
776 | * enable_device - enable, configure a slot | |
777 | * @slot: slot to be enabled | |
778 | * | |
779 | * This function should be called per *physical slot*, | |
780 | * not per each slot object in ACPI namespace. | |
781 | * | |
782 | */ | |
783 | static int enable_device(struct acpiphp_slot *slot) | |
784 | { | |
785 | u8 bus; | |
786 | struct pci_dev *dev; | |
787 | struct pci_bus *child; | |
788 | struct list_head *l; | |
789 | struct acpiphp_func *func; | |
790 | int retval = 0; | |
791 | int num; | |
792 | ||
793 | if (slot->flags & SLOT_ENABLED) | |
794 | goto err_exit; | |
795 | ||
796 | /* sanity check: dev should be NULL when hot-plugged in */ | |
797 | dev = pci_find_slot(slot->bridge->bus, PCI_DEVFN(slot->device, 0)); | |
798 | if (dev) { | |
799 | /* This case shouldn't happen */ | |
800 | err("pci_dev structure already exists.\n"); | |
801 | retval = -1; | |
802 | goto err_exit; | |
803 | } | |
804 | ||
805 | /* allocate resources to device */ | |
806 | retval = acpiphp_configure_slot(slot); | |
807 | if (retval) | |
808 | goto err_exit; | |
809 | ||
810 | /* returned `dev' is the *first function* only! */ | |
811 | num = pci_scan_slot(slot->bridge->pci_bus, PCI_DEVFN(slot->device, 0)); | |
812 | if (num) | |
813 | pci_bus_add_devices(slot->bridge->pci_bus); | |
814 | dev = pci_find_slot(slot->bridge->bus, PCI_DEVFN(slot->device, 0)); | |
815 | ||
816 | if (!dev) { | |
817 | err("No new device found\n"); | |
818 | retval = -1; | |
819 | goto err_exit; | |
820 | } | |
821 | ||
822 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { | |
823 | pci_read_config_byte(dev, PCI_SECONDARY_BUS, &bus); | |
824 | child = (struct pci_bus*) pci_add_new_bus(dev->bus, dev, bus); | |
825 | pci_do_scan_bus(child); | |
826 | } | |
827 | ||
828 | /* associate pci_dev to our representation */ | |
829 | list_for_each (l, &slot->funcs) { | |
830 | func = list_entry(l, struct acpiphp_func, sibling); | |
831 | ||
832 | func->pci_dev = pci_find_slot(slot->bridge->bus, | |
833 | PCI_DEVFN(slot->device, | |
834 | func->function)); | |
835 | if (!func->pci_dev) | |
836 | continue; | |
837 | ||
838 | /* configure device */ | |
839 | retval = acpiphp_configure_function(func); | |
840 | if (retval) | |
841 | goto err_exit; | |
842 | } | |
843 | ||
844 | slot->flags |= SLOT_ENABLED; | |
845 | ||
846 | dbg("Available resources:\n"); | |
847 | acpiphp_dump_resource(slot->bridge); | |
848 | ||
849 | err_exit: | |
850 | return retval; | |
851 | } | |
852 | ||
853 | ||
854 | /** | |
855 | * disable_device - disable a slot | |
856 | */ | |
857 | static int disable_device(struct acpiphp_slot *slot) | |
858 | { | |
859 | int retval = 0; | |
860 | struct acpiphp_func *func; | |
861 | struct list_head *l; | |
862 | ||
863 | /* is this slot already disabled? */ | |
864 | if (!(slot->flags & SLOT_ENABLED)) | |
865 | goto err_exit; | |
866 | ||
867 | list_for_each (l, &slot->funcs) { | |
868 | func = list_entry(l, struct acpiphp_func, sibling); | |
869 | ||
870 | if (func->pci_dev) | |
871 | acpiphp_unconfigure_function(func); | |
872 | } | |
873 | ||
874 | slot->flags &= (~SLOT_ENABLED); | |
875 | ||
876 | err_exit: | |
877 | return retval; | |
878 | } | |
879 | ||
880 | ||
881 | /** | |
882 | * get_slot_status - get ACPI slot status | |
883 | * | |
884 | * if a slot has _STA for each function and if any one of them | |
885 | * returned non-zero status, return it | |
886 | * | |
887 | * if a slot doesn't have _STA and if any one of its functions' | |
888 | * configuration space is configured, return 0x0f as a _STA | |
889 | * | |
890 | * otherwise return 0 | |
891 | */ | |
892 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
893 | { | |
894 | acpi_status status; | |
895 | unsigned long sta = 0; | |
896 | u32 dvid; | |
897 | struct list_head *l; | |
898 | struct acpiphp_func *func; | |
899 | ||
900 | list_for_each (l, &slot->funcs) { | |
901 | func = list_entry(l, struct acpiphp_func, sibling); | |
902 | ||
903 | if (func->flags & FUNC_HAS_STA) { | |
904 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
905 | if (ACPI_SUCCESS(status) && sta) | |
906 | break; | |
907 | } else { | |
908 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
909 | PCI_DEVFN(slot->device, | |
910 | func->function), | |
911 | PCI_VENDOR_ID, &dvid); | |
912 | if (dvid != 0xffffffff) { | |
913 | sta = ACPI_STA_ALL; | |
914 | break; | |
915 | } | |
916 | } | |
917 | } | |
918 | ||
919 | return (unsigned int)sta; | |
920 | } | |
921 | ||
922 | /** | |
923 | * acpiphp_check_bridge - re-enumerate devices | |
924 | * | |
925 | * Iterate over all slots under this bridge and make sure that if a | |
926 | * card is present they are enabled, and if not they are disabled. | |
927 | */ | |
928 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
929 | { | |
930 | struct acpiphp_slot *slot; | |
931 | int retval = 0; | |
932 | int enabled, disabled; | |
933 | ||
934 | enabled = disabled = 0; | |
935 | ||
936 | for (slot = bridge->slots; slot; slot = slot->next) { | |
937 | unsigned int status = get_slot_status(slot); | |
938 | if (slot->flags & SLOT_ENABLED) { | |
939 | if (status == ACPI_STA_ALL) | |
940 | continue; | |
941 | retval = acpiphp_disable_slot(slot); | |
942 | if (retval) { | |
943 | err("Error occurred in disabling\n"); | |
944 | goto err_exit; | |
945 | } | |
946 | disabled++; | |
947 | } else { | |
948 | if (status != ACPI_STA_ALL) | |
949 | continue; | |
950 | retval = acpiphp_enable_slot(slot); | |
951 | if (retval) { | |
952 | err("Error occurred in enabling\n"); | |
953 | goto err_exit; | |
954 | } | |
955 | enabled++; | |
956 | } | |
957 | } | |
958 | ||
959 | dbg("%s: %d enabled, %d disabled\n", __FUNCTION__, enabled, disabled); | |
960 | ||
961 | err_exit: | |
962 | return retval; | |
963 | } | |
964 | ||
965 | /* | |
966 | * ACPI event handlers | |
967 | */ | |
968 | ||
969 | /** | |
970 | * handle_hotplug_event_bridge - handle ACPI event on bridges | |
971 | * | |
972 | * @handle: Notify()'ed acpi_handle | |
973 | * @type: Notify code | |
974 | * @context: pointer to acpiphp_bridge structure | |
975 | * | |
976 | * handles ACPI event notification on {host,p2p} bridges | |
977 | * | |
978 | */ | |
979 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) | |
980 | { | |
981 | struct acpiphp_bridge *bridge; | |
982 | char objname[64]; | |
983 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
984 | .pointer = objname }; | |
985 | ||
986 | bridge = (struct acpiphp_bridge *)context; | |
987 | ||
988 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
989 | ||
990 | switch (type) { | |
991 | case ACPI_NOTIFY_BUS_CHECK: | |
992 | /* bus re-enumerate */ | |
993 | dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname); | |
994 | acpiphp_check_bridge(bridge); | |
995 | break; | |
996 | ||
997 | case ACPI_NOTIFY_DEVICE_CHECK: | |
998 | /* device check */ | |
999 | dbg("%s: Device check notify on %s\n", __FUNCTION__, objname); | |
1000 | acpiphp_check_bridge(bridge); | |
1001 | break; | |
1002 | ||
1003 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1004 | /* wake event */ | |
1005 | dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname); | |
1006 | break; | |
1007 | ||
1008 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1009 | /* request device eject */ | |
1010 | dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname); | |
1011 | break; | |
1012 | ||
1013 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1014 | printk(KERN_ERR "Device %s cannot be configured due" | |
1015 | " to a frequency mismatch\n", objname); | |
1016 | break; | |
1017 | ||
1018 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1019 | printk(KERN_ERR "Device %s cannot be configured due" | |
1020 | " to a bus mode mismatch\n", objname); | |
1021 | break; | |
1022 | ||
1023 | case ACPI_NOTIFY_POWER_FAULT: | |
1024 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1025 | objname); | |
1026 | break; | |
1027 | ||
1028 | default: | |
1029 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1030 | break; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | ||
1035 | /** | |
1036 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1037 | * | |
1038 | * @handle: Notify()'ed acpi_handle | |
1039 | * @type: Notify code | |
1040 | * @context: pointer to acpiphp_func structure | |
1041 | * | |
1042 | * handles ACPI event notification on slots | |
1043 | * | |
1044 | */ | |
1045 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) | |
1046 | { | |
1047 | struct acpiphp_func *func; | |
1048 | char objname[64]; | |
1049 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1050 | .pointer = objname }; | |
1051 | ||
1052 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1053 | ||
1054 | func = (struct acpiphp_func *)context; | |
1055 | ||
1056 | switch (type) { | |
1057 | case ACPI_NOTIFY_BUS_CHECK: | |
1058 | /* bus re-enumerate */ | |
1059 | dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname); | |
1060 | acpiphp_enable_slot(func->slot); | |
1061 | break; | |
1062 | ||
1063 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1064 | /* device check : re-enumerate from parent bus */ | |
1065 | dbg("%s: Device check notify on %s\n", __FUNCTION__, objname); | |
1066 | acpiphp_check_bridge(func->slot->bridge); | |
1067 | break; | |
1068 | ||
1069 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1070 | /* wake event */ | |
1071 | dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname); | |
1072 | break; | |
1073 | ||
1074 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1075 | /* request device eject */ | |
1076 | dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname); | |
1077 | acpiphp_disable_slot(func->slot); | |
1078 | break; | |
1079 | ||
1080 | default: | |
1081 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1082 | break; | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | ||
1087 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1088 | .add = add_bridge, | |
1089 | .remove = remove_bridge, | |
1090 | }; | |
1091 | ||
1092 | /** | |
1093 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1094 | * | |
1095 | */ | |
1096 | int __init acpiphp_glue_init(void) | |
1097 | { | |
1098 | int num; | |
1099 | ||
1100 | if (list_empty(&pci_root_buses)) | |
1101 | return -1; | |
1102 | ||
1103 | num = acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1104 | ||
1105 | if (num <= 0) | |
1106 | return -1; | |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | ||
1112 | /** | |
1113 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1114 | * | |
1115 | * This function frees all data allocated in acpiphp_glue_init() | |
1116 | */ | |
1117 | void __exit acpiphp_glue_exit(void) | |
1118 | { | |
1119 | struct list_head *l1, *l2, *n1, *n2; | |
1120 | struct acpiphp_bridge *bridge; | |
1121 | struct acpiphp_slot *slot, *next; | |
1122 | struct acpiphp_func *func; | |
1123 | acpi_status status; | |
1124 | ||
1125 | list_for_each_safe (l1, n1, &bridge_list) { | |
1126 | bridge = (struct acpiphp_bridge *)l1; | |
1127 | slot = bridge->slots; | |
1128 | while (slot) { | |
1129 | next = slot->next; | |
1130 | list_for_each_safe (l2, n2, &slot->funcs) { | |
1131 | func = list_entry(l2, struct acpiphp_func, sibling); | |
1132 | acpiphp_free_resource(&func->io_head); | |
1133 | acpiphp_free_resource(&func->mem_head); | |
1134 | acpiphp_free_resource(&func->p_mem_head); | |
1135 | acpiphp_free_resource(&func->bus_head); | |
1136 | status = acpi_remove_notify_handler(func->handle, | |
1137 | ACPI_SYSTEM_NOTIFY, | |
1138 | handle_hotplug_event_func); | |
1139 | if (ACPI_FAILURE(status)) | |
1140 | err("failed to remove notify handler\n"); | |
1141 | kfree(func); | |
1142 | } | |
1143 | kfree(slot); | |
1144 | slot = next; | |
1145 | } | |
1146 | status = acpi_remove_notify_handler(bridge->handle, ACPI_SYSTEM_NOTIFY, | |
1147 | handle_hotplug_event_bridge); | |
1148 | if (ACPI_FAILURE(status)) | |
1149 | err("failed to remove notify handler\n"); | |
1150 | ||
1151 | acpiphp_free_resource(&bridge->io_head); | |
1152 | acpiphp_free_resource(&bridge->mem_head); | |
1153 | acpiphp_free_resource(&bridge->p_mem_head); | |
1154 | acpiphp_free_resource(&bridge->bus_head); | |
1155 | ||
1156 | kfree(bridge); | |
1157 | } | |
1158 | ||
1159 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); | |
1160 | } | |
1161 | ||
1162 | ||
1163 | /** | |
1164 | * acpiphp_get_num_slots - count number of slots in a system | |
1165 | */ | |
1166 | int __init acpiphp_get_num_slots(void) | |
1167 | { | |
1168 | struct list_head *node; | |
1169 | struct acpiphp_bridge *bridge; | |
1170 | int num_slots; | |
1171 | ||
1172 | num_slots = 0; | |
1173 | ||
1174 | list_for_each (node, &bridge_list) { | |
1175 | bridge = (struct acpiphp_bridge *)node; | |
1176 | dbg("Bus%d %dslot(s)\n", bridge->bus, bridge->nr_slots); | |
1177 | num_slots += bridge->nr_slots; | |
1178 | } | |
1179 | ||
1180 | dbg("Total %dslots\n", num_slots); | |
1181 | return num_slots; | |
1182 | } | |
1183 | ||
1184 | ||
1185 | #if 0 | |
1186 | /** | |
1187 | * acpiphp_for_each_slot - call function for each slot | |
1188 | * @fn: callback function | |
1189 | * @data: context to be passed to callback function | |
1190 | * | |
1191 | */ | |
1192 | static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) | |
1193 | { | |
1194 | struct list_head *node; | |
1195 | struct acpiphp_bridge *bridge; | |
1196 | struct acpiphp_slot *slot; | |
1197 | int retval = 0; | |
1198 | ||
1199 | list_for_each (node, &bridge_list) { | |
1200 | bridge = (struct acpiphp_bridge *)node; | |
1201 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1202 | retval = fn(slot, data); | |
1203 | if (!retval) | |
1204 | goto err_exit; | |
1205 | } | |
1206 | } | |
1207 | ||
1208 | err_exit: | |
1209 | return retval; | |
1210 | } | |
1211 | #endif | |
1212 | ||
1213 | /* search matching slot from id */ | |
1214 | struct acpiphp_slot *get_slot_from_id(int id) | |
1215 | { | |
1216 | struct list_head *node; | |
1217 | struct acpiphp_bridge *bridge; | |
1218 | struct acpiphp_slot *slot; | |
1219 | ||
1220 | list_for_each (node, &bridge_list) { | |
1221 | bridge = (struct acpiphp_bridge *)node; | |
1222 | for (slot = bridge->slots; slot; slot = slot->next) | |
1223 | if (slot->id == id) | |
1224 | return slot; | |
1225 | } | |
1226 | ||
1227 | /* should never happen! */ | |
1228 | err("%s: no object for id %d\n", __FUNCTION__, id); | |
1229 | WARN_ON(1); | |
1230 | return NULL; | |
1231 | } | |
1232 | ||
1233 | ||
1234 | /** | |
1235 | * acpiphp_enable_slot - power on slot | |
1236 | */ | |
1237 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1238 | { | |
1239 | int retval; | |
1240 | ||
1241 | down(&slot->crit_sect); | |
1242 | ||
1243 | /* wake up all functions */ | |
1244 | retval = power_on_slot(slot); | |
1245 | if (retval) | |
1246 | goto err_exit; | |
1247 | ||
1248 | if (get_slot_status(slot) == ACPI_STA_ALL) | |
1249 | /* configure all functions */ | |
1250 | retval = enable_device(slot); | |
1251 | ||
1252 | err_exit: | |
1253 | up(&slot->crit_sect); | |
1254 | return retval; | |
1255 | } | |
1256 | ||
1257 | ||
1258 | /** | |
1259 | * acpiphp_disable_slot - power off slot | |
1260 | */ | |
1261 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1262 | { | |
1263 | int retval = 0; | |
1264 | ||
1265 | down(&slot->crit_sect); | |
1266 | ||
1267 | /* unconfigure all functions */ | |
1268 | retval = disable_device(slot); | |
1269 | if (retval) | |
1270 | goto err_exit; | |
1271 | ||
1272 | /* power off all functions */ | |
1273 | retval = power_off_slot(slot); | |
1274 | if (retval) | |
1275 | goto err_exit; | |
1276 | ||
1277 | acpiphp_resource_sort_and_combine(&slot->bridge->io_head); | |
1278 | acpiphp_resource_sort_and_combine(&slot->bridge->mem_head); | |
1279 | acpiphp_resource_sort_and_combine(&slot->bridge->p_mem_head); | |
1280 | acpiphp_resource_sort_and_combine(&slot->bridge->bus_head); | |
1281 | dbg("Available resources:\n"); | |
1282 | acpiphp_dump_resource(slot->bridge); | |
1283 | ||
1284 | err_exit: | |
1285 | up(&slot->crit_sect); | |
1286 | return retval; | |
1287 | } | |
1288 | ||
1289 | ||
1290 | /* | |
1291 | * slot enabled: 1 | |
1292 | * slot disabled: 0 | |
1293 | */ | |
1294 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1295 | { | |
1296 | unsigned int sta; | |
1297 | ||
1298 | sta = get_slot_status(slot); | |
1299 | ||
1300 | return (sta & ACPI_STA_ENABLED) ? 1 : 0; | |
1301 | } | |
1302 | ||
1303 | ||
1304 | /* | |
1305 | * latch closed: 1 | |
1306 | * latch open: 0 | |
1307 | */ | |
1308 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1309 | { | |
1310 | unsigned int sta; | |
1311 | ||
1312 | sta = get_slot_status(slot); | |
1313 | ||
1314 | return (sta & ACPI_STA_SHOW_IN_UI) ? 1 : 0; | |
1315 | } | |
1316 | ||
1317 | ||
1318 | /* | |
1319 | * adapter presence : 1 | |
1320 | * absence : 0 | |
1321 | */ | |
1322 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1323 | { | |
1324 | unsigned int sta; | |
1325 | ||
1326 | sta = get_slot_status(slot); | |
1327 | ||
1328 | return (sta == 0) ? 0 : 1; | |
1329 | } | |
1330 | ||
1331 | ||
1332 | /* | |
1333 | * pci address (seg/bus/dev) | |
1334 | */ | |
1335 | u32 acpiphp_get_address(struct acpiphp_slot *slot) | |
1336 | { | |
1337 | u32 address; | |
1338 | ||
1339 | address = ((slot->bridge->seg) << 16) | | |
1340 | ((slot->bridge->bus) << 8) | | |
1341 | slot->device; | |
1342 | ||
1343 | return address; | |
1344 | } |