Commit | Line | Data |
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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 | |
42f49a6a RS |
7 | * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com) |
8 | * Copyright (C) 2003-2005 Hewlett Packard | |
8e7561cf RS |
9 | * Copyright (C) 2005 Rajesh Shah (rajesh.shah@intel.com) |
10 | * Copyright (C) 2005 Intel Corporation | |
1da177e4 LT |
11 | * |
12 | * All rights reserved. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or (at | |
17 | * your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, but | |
20 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
22 | * NON INFRINGEMENT. See the GNU General Public License for more | |
23 | * details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
28 | * | |
29 | * Send feedback to <t-kochi@bq.jp.nec.com> | |
30 | * | |
31 | */ | |
32 | ||
42f49a6a RS |
33 | /* |
34 | * Lifetime rules for pci_dev: | |
35 | * - The one in acpiphp_func has its refcount elevated by pci_get_slot() | |
36 | * when the driver is loaded or when an insertion event occurs. It loses | |
37 | * a refcount when its ejected or the driver unloads. | |
38 | * - The one in acpiphp_bridge has its refcount elevated by pci_get_slot() | |
39 | * when the bridge is scanned and it loses a refcount when the bridge | |
40 | * is removed. | |
41 | */ | |
42 | ||
1da177e4 LT |
43 | #include <linux/init.h> |
44 | #include <linux/module.h> | |
45 | ||
46 | #include <linux/kernel.h> | |
47 | #include <linux/pci.h> | |
48 | #include <linux/smp_lock.h> | |
6aa4cdd0 | 49 | #include <linux/mutex.h> |
1da177e4 LT |
50 | |
51 | #include "../pci.h" | |
52 | #include "pci_hotplug.h" | |
53 | #include "acpiphp.h" | |
54 | ||
55 | static LIST_HEAD(bridge_list); | |
56 | ||
57 | #define MY_NAME "acpiphp_glue" | |
58 | ||
59 | static void handle_hotplug_event_bridge (acpi_handle, u32, void *); | |
8e5dce35 KA |
60 | static void acpiphp_sanitize_bus(struct pci_bus *bus); |
61 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus); | |
62 | ||
1da177e4 LT |
63 | |
64 | /* | |
65 | * initialization & terminatation routines | |
66 | */ | |
67 | ||
68 | /** | |
69 | * is_ejectable - determine if a slot is ejectable | |
70 | * @handle: handle to acpi namespace | |
71 | * | |
72 | * Ejectable slot should satisfy at least these conditions: | |
73 | * | |
74 | * 1. has _ADR method | |
75 | * 2. has _EJ0 method | |
76 | * | |
77 | * optionally | |
78 | * | |
79 | * 1. has _STA method | |
80 | * 2. has _PS0 method | |
81 | * 3. has _PS3 method | |
82 | * 4. .. | |
83 | * | |
84 | */ | |
85 | static int is_ejectable(acpi_handle handle) | |
86 | { | |
87 | acpi_status status; | |
88 | acpi_handle tmp; | |
89 | ||
90 | status = acpi_get_handle(handle, "_ADR", &tmp); | |
91 | if (ACPI_FAILURE(status)) { | |
92 | return 0; | |
93 | } | |
94 | ||
95 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
96 | if (ACPI_FAILURE(status)) { | |
97 | return 0; | |
98 | } | |
99 | ||
100 | return 1; | |
101 | } | |
102 | ||
103 | ||
104 | /* callback routine to check the existence of ejectable slots */ | |
105 | static acpi_status | |
106 | is_ejectable_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
107 | { | |
108 | int *count = (int *)context; | |
109 | ||
110 | if (is_ejectable(handle)) { | |
111 | (*count)++; | |
112 | /* only one ejectable slot is enough */ | |
113 | return AE_CTRL_TERMINATE; | |
114 | } else { | |
115 | return AE_OK; | |
116 | } | |
117 | } | |
118 | ||
119 | ||
120 | /* callback routine to register each ACPI PCI slot object */ | |
121 | static acpi_status | |
122 | register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
123 | { | |
124 | struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; | |
125 | struct acpiphp_slot *slot; | |
126 | struct acpiphp_func *newfunc; | |
20416ea5 | 127 | struct dependent_device *dd; |
1da177e4 LT |
128 | acpi_handle tmp; |
129 | acpi_status status = AE_OK; | |
130 | unsigned long adr, sun; | |
e27da381 | 131 | int device, function, retval; |
1da177e4 LT |
132 | |
133 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); | |
134 | ||
135 | if (ACPI_FAILURE(status)) | |
136 | return AE_OK; | |
137 | ||
138 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
139 | ||
20416ea5 | 140 | if (ACPI_FAILURE(status) && !(is_dependent_device(handle))) |
1da177e4 LT |
141 | return AE_OK; |
142 | ||
143 | device = (adr >> 16) & 0xffff; | |
144 | function = adr & 0xffff; | |
145 | ||
146 | newfunc = kmalloc(sizeof(struct acpiphp_func), GFP_KERNEL); | |
147 | if (!newfunc) | |
148 | return AE_NO_MEMORY; | |
149 | memset(newfunc, 0, sizeof(struct acpiphp_func)); | |
150 | ||
151 | INIT_LIST_HEAD(&newfunc->sibling); | |
152 | newfunc->handle = handle; | |
153 | newfunc->function = function; | |
20416ea5 KA |
154 | if (ACPI_SUCCESS(status)) |
155 | newfunc->flags = FUNC_HAS_EJ0; | |
1da177e4 LT |
156 | |
157 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) | |
158 | newfunc->flags |= FUNC_HAS_STA; | |
159 | ||
160 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp))) | |
161 | newfunc->flags |= FUNC_HAS_PS0; | |
162 | ||
163 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) | |
164 | newfunc->flags |= FUNC_HAS_PS3; | |
165 | ||
20416ea5 KA |
166 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) { |
167 | newfunc->flags |= FUNC_HAS_DCK; | |
168 | /* add to devices dependent on dock station, | |
169 | * because this may actually be the dock bridge | |
170 | */ | |
171 | dd = alloc_dependent_device(handle); | |
172 | if (!dd) | |
173 | err("Can't allocate memory for " | |
174 | "new dependent device!\n"); | |
175 | else | |
176 | add_dependent_device(dd); | |
177 | } | |
178 | ||
1da177e4 LT |
179 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); |
180 | if (ACPI_FAILURE(status)) | |
181 | sun = -1; | |
182 | ||
183 | /* search for objects that share the same slot */ | |
184 | for (slot = bridge->slots; slot; slot = slot->next) | |
185 | if (slot->device == device) { | |
186 | if (slot->sun != sun) | |
187 | warn("sibling found, but _SUN doesn't match!\n"); | |
188 | break; | |
189 | } | |
190 | ||
191 | if (!slot) { | |
192 | slot = kmalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); | |
193 | if (!slot) { | |
194 | kfree(newfunc); | |
195 | return AE_NO_MEMORY; | |
196 | } | |
197 | ||
198 | memset(slot, 0, sizeof(struct acpiphp_slot)); | |
199 | slot->bridge = bridge; | |
1da177e4 LT |
200 | slot->device = device; |
201 | slot->sun = sun; | |
202 | INIT_LIST_HEAD(&slot->funcs); | |
6aa4cdd0 | 203 | mutex_init(&slot->crit_sect); |
1da177e4 LT |
204 | |
205 | slot->next = bridge->slots; | |
206 | bridge->slots = slot; | |
207 | ||
208 | bridge->nr_slots++; | |
209 | ||
42f49a6a RS |
210 | dbg("found ACPI PCI Hotplug slot %d at PCI %04x:%02x:%02x\n", |
211 | slot->sun, pci_domain_nr(bridge->pci_bus), | |
212 | bridge->pci_bus->number, slot->device); | |
e27da381 MT |
213 | retval = acpiphp_register_hotplug_slot(slot); |
214 | if (retval) { | |
215 | warn("acpiphp_register_hotplug_slot failed(err code = 0x%x)\n", retval); | |
216 | goto err_exit; | |
217 | } | |
1da177e4 LT |
218 | } |
219 | ||
220 | newfunc->slot = slot; | |
221 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
222 | ||
223 | /* associate corresponding pci_dev */ | |
42f49a6a | 224 | newfunc->pci_dev = pci_get_slot(bridge->pci_bus, |
1da177e4 LT |
225 | PCI_DEVFN(device, function)); |
226 | if (newfunc->pci_dev) { | |
1da177e4 LT |
227 | slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); |
228 | } | |
229 | ||
20416ea5 KA |
230 | /* if this is a device dependent on a dock station, |
231 | * associate the acpiphp_func to the dependent_device | |
232 | * struct. | |
233 | */ | |
234 | if ((dd = get_dependent_device(handle))) { | |
235 | newfunc->flags |= FUNC_IS_DD; | |
236 | /* | |
237 | * we don't want any devices which is dependent | |
238 | * on the dock to have it's _EJ0 method executed. | |
239 | * because we need to run _DCK first. | |
240 | */ | |
241 | newfunc->flags &= ~FUNC_HAS_EJ0; | |
242 | dd->func = newfunc; | |
243 | add_pci_dependent_device(dd); | |
244 | } | |
245 | ||
1da177e4 | 246 | /* install notify handler */ |
20416ea5 KA |
247 | if (!(newfunc->flags & FUNC_HAS_DCK)) { |
248 | status = acpi_install_notify_handler(handle, | |
1da177e4 LT |
249 | ACPI_SYSTEM_NOTIFY, |
250 | handle_hotplug_event_func, | |
251 | newfunc); | |
252 | ||
20416ea5 KA |
253 | if (ACPI_FAILURE(status)) |
254 | err("failed to register interrupt notify handler\n"); | |
255 | } else | |
256 | status = AE_OK; | |
1da177e4 | 257 | |
20416ea5 | 258 | return status; |
e27da381 MT |
259 | |
260 | err_exit: | |
261 | bridge->nr_slots--; | |
262 | bridge->slots = slot->next; | |
263 | kfree(slot); | |
264 | kfree(newfunc); | |
265 | ||
266 | return AE_OK; | |
1da177e4 LT |
267 | } |
268 | ||
269 | ||
270 | /* see if it's worth looking at this bridge */ | |
271 | static int detect_ejectable_slots(acpi_handle *bridge_handle) | |
272 | { | |
273 | acpi_status status; | |
274 | int count; | |
275 | ||
276 | count = 0; | |
277 | ||
278 | /* only check slots defined directly below bridge object */ | |
279 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1, | |
280 | is_ejectable_slot, (void *)&count, NULL); | |
281 | ||
282 | return count; | |
283 | } | |
284 | ||
285 | ||
1da177e4 LT |
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 | ||
e27da381 MT |
349 | /* must be added to the list prior to calling register_slot */ |
350 | list_add(&bridge->list, &bridge_list); | |
351 | ||
1da177e4 LT |
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); | |
e27da381 MT |
355 | if (ACPI_FAILURE(status)) { |
356 | list_del(&bridge->list); | |
357 | return; | |
358 | } | |
1da177e4 LT |
359 | |
360 | /* install notify handler */ | |
8e7561cf RS |
361 | if (bridge->type != BRIDGE_TYPE_HOST) { |
362 | status = acpi_install_notify_handler(bridge->handle, | |
1da177e4 LT |
363 | ACPI_SYSTEM_NOTIFY, |
364 | handle_hotplug_event_bridge, | |
365 | bridge); | |
366 | ||
8e7561cf RS |
367 | if (ACPI_FAILURE(status)) { |
368 | err("failed to register interrupt notify handler\n"); | |
369 | } | |
1da177e4 | 370 | } |
1da177e4 LT |
371 | } |
372 | ||
373 | ||
374 | /* allocate and initialize host bridge data structure */ | |
42f49a6a | 375 | static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus) |
1da177e4 | 376 | { |
1da177e4 LT |
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; | |
1da177e4 | 387 | |
42f49a6a | 388 | bridge->pci_bus = pci_bus; |
1da177e4 LT |
389 | |
390 | spin_lock_init(&bridge->res_lock); | |
391 | ||
1da177e4 LT |
392 | init_bridge_misc(bridge); |
393 | } | |
394 | ||
395 | ||
396 | /* allocate and initialize PCI-to-PCI bridge data structure */ | |
42f49a6a | 397 | static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev) |
1da177e4 LT |
398 | { |
399 | struct acpiphp_bridge *bridge; | |
1da177e4 LT |
400 | |
401 | bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); | |
402 | if (bridge == NULL) { | |
403 | err("out of memory\n"); | |
404 | return; | |
405 | } | |
406 | ||
407 | memset(bridge, 0, sizeof(struct acpiphp_bridge)); | |
408 | ||
409 | bridge->type = BRIDGE_TYPE_P2P; | |
410 | bridge->handle = handle; | |
1da177e4 | 411 | |
42f49a6a RS |
412 | bridge->pci_dev = pci_dev_get(pci_dev); |
413 | bridge->pci_bus = pci_dev->subordinate; | |
1da177e4 LT |
414 | if (!bridge->pci_bus) { |
415 | err("This is not a PCI-to-PCI bridge!\n"); | |
42f49a6a | 416 | goto err; |
1da177e4 LT |
417 | } |
418 | ||
419 | spin_lock_init(&bridge->res_lock); | |
420 | ||
1da177e4 | 421 | init_bridge_misc(bridge); |
42f49a6a RS |
422 | return; |
423 | err: | |
424 | pci_dev_put(pci_dev); | |
425 | kfree(bridge); | |
426 | return; | |
1da177e4 LT |
427 | } |
428 | ||
429 | ||
430 | /* callback routine to find P2P bridges */ | |
431 | static acpi_status | |
432 | find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
433 | { | |
434 | acpi_status status; | |
435 | acpi_handle dummy_handle; | |
1da177e4 | 436 | unsigned long tmp; |
42f49a6a | 437 | int device, function; |
1da177e4 | 438 | struct pci_dev *dev; |
42f49a6a | 439 | struct pci_bus *pci_bus = context; |
1da177e4 LT |
440 | |
441 | status = acpi_get_handle(handle, "_ADR", &dummy_handle); | |
442 | if (ACPI_FAILURE(status)) | |
443 | return AE_OK; /* continue */ | |
444 | ||
445 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp); | |
446 | if (ACPI_FAILURE(status)) { | |
447 | dbg("%s: _ADR evaluation failure\n", __FUNCTION__); | |
448 | return AE_OK; | |
449 | } | |
450 | ||
451 | device = (tmp >> 16) & 0xffff; | |
452 | function = tmp & 0xffff; | |
453 | ||
42f49a6a | 454 | dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function)); |
1da177e4 | 455 | |
42f49a6a RS |
456 | if (!dev || !dev->subordinate) |
457 | goto out; | |
1da177e4 LT |
458 | |
459 | /* check if this bridge has ejectable slots */ | |
20416ea5 KA |
460 | if ((detect_ejectable_slots(handle) > 0) || |
461 | (detect_dependent_devices(handle) > 0)) { | |
1da177e4 | 462 | dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); |
42f49a6a | 463 | add_p2p_bridge(handle, dev); |
1da177e4 LT |
464 | } |
465 | ||
42f49a6a RS |
466 | out: |
467 | pci_dev_put(dev); | |
1da177e4 LT |
468 | return AE_OK; |
469 | } | |
470 | ||
471 | ||
472 | /* find hot-pluggable slots, and then find P2P bridge */ | |
473 | static int add_bridge(acpi_handle handle) | |
474 | { | |
475 | acpi_status status; | |
476 | unsigned long tmp; | |
477 | int seg, bus; | |
478 | acpi_handle dummy_handle; | |
42f49a6a | 479 | struct pci_bus *pci_bus; |
1da177e4 LT |
480 | |
481 | /* if the bridge doesn't have _STA, we assume it is always there */ | |
482 | status = acpi_get_handle(handle, "_STA", &dummy_handle); | |
483 | if (ACPI_SUCCESS(status)) { | |
484 | status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); | |
485 | if (ACPI_FAILURE(status)) { | |
486 | dbg("%s: _STA evaluation failure\n", __FUNCTION__); | |
487 | return 0; | |
488 | } | |
489 | if ((tmp & ACPI_STA_FUNCTIONING) == 0) | |
490 | /* don't register this object */ | |
491 | return 0; | |
492 | } | |
493 | ||
494 | /* get PCI segment number */ | |
495 | status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp); | |
496 | ||
497 | seg = ACPI_SUCCESS(status) ? tmp : 0; | |
498 | ||
499 | /* get PCI bus number */ | |
500 | status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp); | |
501 | ||
502 | if (ACPI_SUCCESS(status)) { | |
503 | bus = tmp; | |
504 | } else { | |
505 | warn("can't get bus number, assuming 0\n"); | |
506 | bus = 0; | |
507 | } | |
508 | ||
42f49a6a RS |
509 | pci_bus = pci_find_bus(seg, bus); |
510 | if (!pci_bus) { | |
511 | err("Can't find bus %04x:%02x\n", seg, bus); | |
512 | return 0; | |
513 | } | |
514 | ||
1da177e4 LT |
515 | /* check if this bridge has ejectable slots */ |
516 | if (detect_ejectable_slots(handle) > 0) { | |
517 | dbg("found PCI host-bus bridge with hot-pluggable slots\n"); | |
42f49a6a | 518 | add_host_bridge(handle, pci_bus); |
1da177e4 LT |
519 | return 0; |
520 | } | |
521 | ||
1da177e4 LT |
522 | /* search P2P bridges under this host bridge */ |
523 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
42f49a6a | 524 | find_p2p_bridge, pci_bus, NULL); |
1da177e4 LT |
525 | |
526 | if (ACPI_FAILURE(status)) | |
527 | warn("find_p2p_bridge faied (error code = 0x%x)\n",status); | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
42f49a6a RS |
532 | static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle) |
533 | { | |
534 | struct list_head *head; | |
535 | list_for_each(head, &bridge_list) { | |
536 | struct acpiphp_bridge *bridge = list_entry(head, | |
537 | struct acpiphp_bridge, list); | |
538 | if (bridge->handle == handle) | |
539 | return bridge; | |
540 | } | |
541 | ||
542 | return NULL; | |
543 | } | |
1da177e4 | 544 | |
364d5094 | 545 | static void cleanup_bridge(struct acpiphp_bridge *bridge) |
1da177e4 | 546 | { |
42f49a6a | 547 | struct list_head *list, *tmp; |
42f49a6a RS |
548 | struct acpiphp_slot *slot; |
549 | acpi_status status; | |
364d5094 | 550 | acpi_handle handle = bridge->handle; |
42f49a6a RS |
551 | |
552 | status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
553 | handle_hotplug_event_bridge); | |
554 | if (ACPI_FAILURE(status)) | |
555 | err("failed to remove notify handler\n"); | |
556 | ||
557 | slot = bridge->slots; | |
558 | while (slot) { | |
559 | struct acpiphp_slot *next = slot->next; | |
560 | list_for_each_safe (list, tmp, &slot->funcs) { | |
561 | struct acpiphp_func *func; | |
562 | func = list_entry(list, struct acpiphp_func, sibling); | |
20416ea5 KA |
563 | if (!(func->flags & FUNC_HAS_DCK)) { |
564 | status = acpi_remove_notify_handler(func->handle, | |
42f49a6a RS |
565 | ACPI_SYSTEM_NOTIFY, |
566 | handle_hotplug_event_func); | |
20416ea5 KA |
567 | if (ACPI_FAILURE(status)) |
568 | err("failed to remove notify handler\n"); | |
569 | } | |
42f49a6a RS |
570 | pci_dev_put(func->pci_dev); |
571 | list_del(list); | |
572 | kfree(func); | |
573 | } | |
e27da381 MT |
574 | acpiphp_unregister_hotplug_slot(slot); |
575 | list_del(&slot->funcs); | |
42f49a6a RS |
576 | kfree(slot); |
577 | slot = next; | |
578 | } | |
579 | ||
580 | pci_dev_put(bridge->pci_dev); | |
581 | list_del(&bridge->list); | |
582 | kfree(bridge); | |
1da177e4 LT |
583 | } |
584 | ||
364d5094 RS |
585 | static acpi_status |
586 | cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
587 | { | |
588 | struct acpiphp_bridge *bridge; | |
589 | ||
590 | if (!(bridge = acpiphp_handle_to_bridge(handle))) | |
591 | return AE_OK; | |
592 | cleanup_bridge(bridge); | |
593 | return AE_OK; | |
594 | } | |
595 | ||
596 | static void remove_bridge(acpi_handle handle) | |
597 | { | |
598 | struct acpiphp_bridge *bridge; | |
599 | ||
600 | bridge = acpiphp_handle_to_bridge(handle); | |
601 | if (bridge) { | |
602 | cleanup_bridge(bridge); | |
603 | } else { | |
604 | /* clean-up p2p bridges under this host bridge */ | |
605 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
606 | (u32)1, cleanup_p2p_bridge, NULL, NULL); | |
607 | } | |
608 | } | |
1da177e4 | 609 | |
a0d399a8 KK |
610 | static struct pci_dev * get_apic_pci_info(acpi_handle handle) |
611 | { | |
612 | struct acpi_pci_id id; | |
613 | struct pci_bus *bus; | |
614 | struct pci_dev *dev; | |
615 | ||
616 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &id))) | |
617 | return NULL; | |
618 | ||
619 | bus = pci_find_bus(id.segment, id.bus); | |
620 | if (!bus) | |
621 | return NULL; | |
622 | ||
623 | dev = pci_get_slot(bus, PCI_DEVFN(id.device, id.function)); | |
624 | if (!dev) | |
625 | return NULL; | |
626 | ||
627 | if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) && | |
628 | (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC)) | |
629 | { | |
630 | pci_dev_put(dev); | |
631 | return NULL; | |
632 | } | |
633 | ||
634 | return dev; | |
635 | } | |
636 | ||
637 | static int get_gsi_base(acpi_handle handle, u32 *gsi_base) | |
638 | { | |
639 | acpi_status status; | |
640 | int result = -1; | |
641 | unsigned long gsb; | |
642 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
643 | union acpi_object *obj; | |
644 | void *table; | |
645 | ||
646 | status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb); | |
647 | if (ACPI_SUCCESS(status)) { | |
648 | *gsi_base = (u32)gsb; | |
649 | return 0; | |
650 | } | |
651 | ||
652 | status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer); | |
653 | if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer) | |
654 | return -1; | |
655 | ||
656 | obj = buffer.pointer; | |
657 | if (obj->type != ACPI_TYPE_BUFFER) | |
658 | goto out; | |
659 | ||
660 | table = obj->buffer.pointer; | |
661 | switch (((acpi_table_entry_header *)table)->type) { | |
662 | case ACPI_MADT_IOSAPIC: | |
663 | *gsi_base = ((struct acpi_table_iosapic *)table)->global_irq_base; | |
664 | result = 0; | |
665 | break; | |
666 | case ACPI_MADT_IOAPIC: | |
667 | *gsi_base = ((struct acpi_table_ioapic *)table)->global_irq_base; | |
668 | result = 0; | |
669 | break; | |
670 | default: | |
671 | break; | |
672 | } | |
673 | out: | |
674 | acpi_os_free(buffer.pointer); | |
675 | return result; | |
676 | } | |
677 | ||
678 | static acpi_status | |
679 | ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv) | |
680 | { | |
681 | acpi_status status; | |
682 | unsigned long sta; | |
683 | acpi_handle tmp; | |
684 | struct pci_dev *pdev; | |
685 | u32 gsi_base; | |
686 | u64 phys_addr; | |
687 | ||
688 | /* Evaluate _STA if present */ | |
689 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
690 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
691 | return AE_CTRL_DEPTH; | |
692 | ||
693 | /* Scan only PCI bus scope */ | |
694 | status = acpi_get_handle(handle, "_HID", &tmp); | |
695 | if (ACPI_SUCCESS(status)) | |
696 | return AE_CTRL_DEPTH; | |
697 | ||
698 | if (get_gsi_base(handle, &gsi_base)) | |
699 | return AE_OK; | |
700 | ||
701 | pdev = get_apic_pci_info(handle); | |
702 | if (!pdev) | |
703 | return AE_OK; | |
704 | ||
705 | if (pci_enable_device(pdev)) { | |
706 | pci_dev_put(pdev); | |
707 | return AE_OK; | |
708 | } | |
709 | ||
710 | pci_set_master(pdev); | |
711 | ||
712 | if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) { | |
713 | pci_disable_device(pdev); | |
714 | pci_dev_put(pdev); | |
715 | return AE_OK; | |
716 | } | |
717 | ||
718 | phys_addr = pci_resource_start(pdev, 0); | |
719 | if (acpi_register_ioapic(handle, phys_addr, gsi_base)) { | |
720 | pci_release_region(pdev, 0); | |
721 | pci_disable_device(pdev); | |
722 | pci_dev_put(pdev); | |
723 | return AE_OK; | |
724 | } | |
725 | ||
726 | return AE_OK; | |
727 | } | |
728 | ||
729 | static int acpiphp_configure_ioapics(acpi_handle handle) | |
730 | { | |
731 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
732 | ACPI_UINT32_MAX, ioapic_add, NULL, NULL); | |
733 | return 0; | |
734 | } | |
735 | ||
1da177e4 LT |
736 | static int power_on_slot(struct acpiphp_slot *slot) |
737 | { | |
738 | acpi_status status; | |
739 | struct acpiphp_func *func; | |
740 | struct list_head *l; | |
741 | int retval = 0; | |
742 | ||
743 | /* if already enabled, just skip */ | |
744 | if (slot->flags & SLOT_POWEREDON) | |
745 | goto err_exit; | |
746 | ||
747 | list_for_each (l, &slot->funcs) { | |
748 | func = list_entry(l, struct acpiphp_func, sibling); | |
749 | ||
750 | if (func->flags & FUNC_HAS_PS0) { | |
751 | dbg("%s: executing _PS0\n", __FUNCTION__); | |
752 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); | |
753 | if (ACPI_FAILURE(status)) { | |
754 | warn("%s: _PS0 failed\n", __FUNCTION__); | |
755 | retval = -1; | |
756 | goto err_exit; | |
757 | } else | |
758 | break; | |
759 | } | |
760 | } | |
761 | ||
762 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
763 | ||
764 | slot->flags |= SLOT_POWEREDON; | |
765 | ||
766 | err_exit: | |
767 | return retval; | |
768 | } | |
769 | ||
770 | ||
771 | static int power_off_slot(struct acpiphp_slot *slot) | |
772 | { | |
773 | acpi_status status; | |
774 | struct acpiphp_func *func; | |
775 | struct list_head *l; | |
1da177e4 LT |
776 | |
777 | int retval = 0; | |
778 | ||
779 | /* if already disabled, just skip */ | |
780 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
781 | goto err_exit; | |
782 | ||
783 | list_for_each (l, &slot->funcs) { | |
784 | func = list_entry(l, struct acpiphp_func, sibling); | |
785 | ||
2f523b15 | 786 | if (func->flags & FUNC_HAS_PS3) { |
1da177e4 LT |
787 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); |
788 | if (ACPI_FAILURE(status)) { | |
789 | warn("%s: _PS3 failed\n", __FUNCTION__); | |
790 | retval = -1; | |
791 | goto err_exit; | |
792 | } else | |
793 | break; | |
794 | } | |
795 | } | |
796 | ||
1da177e4 LT |
797 | /* TBD: evaluate _STA to check if the slot is disabled */ |
798 | ||
799 | slot->flags &= (~SLOT_POWEREDON); | |
800 | ||
801 | err_exit: | |
802 | return retval; | |
803 | } | |
804 | ||
805 | ||
15a1ae74 KA |
806 | |
807 | /** | |
808 | * acpiphp_max_busnr - return the highest reserved bus number under | |
809 | * the given bus. | |
810 | * @bus: bus to start search with | |
811 | * | |
812 | */ | |
813 | static unsigned char acpiphp_max_busnr(struct pci_bus *bus) | |
814 | { | |
815 | struct list_head *tmp; | |
816 | unsigned char max, n; | |
817 | ||
818 | /* | |
819 | * pci_bus_max_busnr will return the highest | |
820 | * reserved busnr for all these children. | |
821 | * that is equivalent to the bus->subordinate | |
822 | * value. We don't want to use the parent's | |
823 | * bus->subordinate value because it could have | |
824 | * padding in it. | |
825 | */ | |
826 | max = bus->secondary; | |
827 | ||
828 | list_for_each(tmp, &bus->children) { | |
829 | n = pci_bus_max_busnr(pci_bus_b(tmp)); | |
830 | if (n > max) | |
831 | max = n; | |
832 | } | |
833 | return max; | |
834 | } | |
835 | ||
836 | ||
837 | ||
838 | /** | |
839 | * get_func - get a pointer to acpiphp_func given a slot, device | |
840 | * @slot: slot to search | |
841 | * @dev: pci_dev struct to match. | |
842 | * | |
843 | * This function will increase the reference count of pci_dev, | |
844 | * so callers should call pci_dev_put when complete. | |
845 | * | |
846 | */ | |
847 | static struct acpiphp_func * | |
848 | get_func(struct acpiphp_slot *slot, struct pci_dev *dev) | |
849 | { | |
850 | struct acpiphp_func *func = NULL; | |
851 | struct pci_bus *bus = slot->bridge->pci_bus; | |
852 | struct pci_dev *pdev; | |
853 | ||
854 | list_for_each_entry(func, &slot->funcs, sibling) { | |
855 | pdev = pci_get_slot(bus, PCI_DEVFN(slot->device, | |
856 | func->function)); | |
857 | if (pdev) { | |
858 | if (pdev == dev) | |
859 | break; | |
860 | pci_dev_put(pdev); | |
861 | } | |
862 | } | |
863 | return func; | |
864 | } | |
865 | ||
866 | ||
867 | /** | |
868 | * acpiphp_bus_add - add a new bus to acpi subsystem | |
869 | * @func: acpiphp_func of the bridge | |
870 | * | |
871 | */ | |
872 | static int acpiphp_bus_add(struct acpiphp_func *func) | |
873 | { | |
874 | acpi_handle phandle; | |
875 | struct acpi_device *device, *pdevice; | |
876 | int ret_val; | |
877 | ||
878 | acpi_get_parent(func->handle, &phandle); | |
879 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
880 | dbg("no parent device, assuming NULL\n"); | |
881 | pdevice = NULL; | |
882 | } | |
20416ea5 KA |
883 | if (!acpi_bus_get_device(func->handle, &device)) { |
884 | dbg("bus exists... trim\n"); | |
885 | /* this shouldn't be in here, so remove | |
886 | * the bus then re-add it... | |
887 | */ | |
888 | ret_val = acpi_bus_trim(device, 1); | |
889 | dbg("acpi_bus_trim return %x\n", ret_val); | |
890 | } | |
891 | ||
892 | ret_val = acpi_bus_add(&device, pdevice, func->handle, | |
893 | ACPI_BUS_TYPE_DEVICE); | |
894 | if (ret_val) { | |
895 | dbg("error adding bus, %x\n", | |
896 | -ret_val); | |
897 | goto acpiphp_bus_add_out; | |
15a1ae74 KA |
898 | } |
899 | /* | |
900 | * try to start anyway. We could have failed to add | |
901 | * simply because this bus had previously been added | |
902 | * on another add. Don't bother with the return value | |
903 | * we just keep going. | |
904 | */ | |
905 | ret_val = acpi_bus_start(device); | |
906 | ||
907 | acpiphp_bus_add_out: | |
908 | return ret_val; | |
909 | } | |
910 | ||
911 | ||
912 | ||
1da177e4 LT |
913 | /** |
914 | * enable_device - enable, configure a slot | |
915 | * @slot: slot to be enabled | |
916 | * | |
917 | * This function should be called per *physical slot*, | |
918 | * not per each slot object in ACPI namespace. | |
919 | * | |
920 | */ | |
921 | static int enable_device(struct acpiphp_slot *slot) | |
922 | { | |
1da177e4 | 923 | struct pci_dev *dev; |
42f49a6a | 924 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 LT |
925 | struct list_head *l; |
926 | struct acpiphp_func *func; | |
927 | int retval = 0; | |
42f49a6a | 928 | int num, max, pass; |
1da177e4 LT |
929 | |
930 | if (slot->flags & SLOT_ENABLED) | |
931 | goto err_exit; | |
932 | ||
933 | /* sanity check: dev should be NULL when hot-plugged in */ | |
42f49a6a | 934 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); |
1da177e4 LT |
935 | if (dev) { |
936 | /* This case shouldn't happen */ | |
937 | err("pci_dev structure already exists.\n"); | |
42f49a6a | 938 | pci_dev_put(dev); |
1da177e4 LT |
939 | retval = -1; |
940 | goto err_exit; | |
941 | } | |
942 | ||
42f49a6a RS |
943 | num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0)); |
944 | if (num == 0) { | |
1da177e4 LT |
945 | err("No new device found\n"); |
946 | retval = -1; | |
947 | goto err_exit; | |
948 | } | |
949 | ||
15a1ae74 | 950 | max = acpiphp_max_busnr(bus); |
42f49a6a RS |
951 | for (pass = 0; pass < 2; pass++) { |
952 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
953 | if (PCI_SLOT(dev->devfn) != slot->device) | |
954 | continue; | |
955 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
c64b5eea | 956 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
42f49a6a | 957 | max = pci_scan_bridge(bus, dev, max, pass); |
15a1ae74 | 958 | if (pass && dev->subordinate) { |
c64b5eea | 959 | pci_bus_size_bridges(dev->subordinate); |
15a1ae74 KA |
960 | func = get_func(slot, dev); |
961 | if (func) { | |
962 | acpiphp_bus_add(func); | |
963 | /* side effect of get_func */ | |
964 | pci_dev_put(dev); | |
965 | } | |
966 | } | |
c64b5eea | 967 | } |
42f49a6a | 968 | } |
1da177e4 LT |
969 | } |
970 | ||
42f49a6a | 971 | pci_bus_assign_resources(bus); |
8e5dce35 KA |
972 | acpiphp_sanitize_bus(bus); |
973 | pci_enable_bridges(bus); | |
42f49a6a | 974 | pci_bus_add_devices(bus); |
8e5dce35 KA |
975 | acpiphp_set_hpp_values(DEVICE_ACPI_HANDLE(&bus->self->dev), bus); |
976 | acpiphp_configure_ioapics(DEVICE_ACPI_HANDLE(&bus->self->dev)); | |
42f49a6a | 977 | |
1da177e4 LT |
978 | /* associate pci_dev to our representation */ |
979 | list_for_each (l, &slot->funcs) { | |
980 | func = list_entry(l, struct acpiphp_func, sibling); | |
42f49a6a | 981 | func->pci_dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
1da177e4 | 982 | func->function)); |
1da177e4 LT |
983 | } |
984 | ||
985 | slot->flags |= SLOT_ENABLED; | |
986 | ||
1da177e4 LT |
987 | err_exit: |
988 | return retval; | |
989 | } | |
990 | ||
991 | ||
992 | /** | |
993 | * disable_device - disable a slot | |
994 | */ | |
995 | static int disable_device(struct acpiphp_slot *slot) | |
996 | { | |
997 | int retval = 0; | |
998 | struct acpiphp_func *func; | |
999 | struct list_head *l; | |
1000 | ||
1001 | /* is this slot already disabled? */ | |
1002 | if (!(slot->flags & SLOT_ENABLED)) | |
1003 | goto err_exit; | |
1004 | ||
1005 | list_for_each (l, &slot->funcs) { | |
1006 | func = list_entry(l, struct acpiphp_func, sibling); | |
42f49a6a RS |
1007 | if (!func->pci_dev) |
1008 | continue; | |
1da177e4 | 1009 | |
42f49a6a RS |
1010 | pci_remove_bus_device(func->pci_dev); |
1011 | pci_dev_put(func->pci_dev); | |
1012 | func->pci_dev = NULL; | |
1da177e4 LT |
1013 | } |
1014 | ||
1015 | slot->flags &= (~SLOT_ENABLED); | |
1016 | ||
1017 | err_exit: | |
1018 | return retval; | |
1019 | } | |
1020 | ||
1021 | ||
1022 | /** | |
1023 | * get_slot_status - get ACPI slot status | |
1024 | * | |
1025 | * if a slot has _STA for each function and if any one of them | |
1026 | * returned non-zero status, return it | |
1027 | * | |
1028 | * if a slot doesn't have _STA and if any one of its functions' | |
1029 | * configuration space is configured, return 0x0f as a _STA | |
1030 | * | |
1031 | * otherwise return 0 | |
1032 | */ | |
1033 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
1034 | { | |
1035 | acpi_status status; | |
1036 | unsigned long sta = 0; | |
1037 | u32 dvid; | |
1038 | struct list_head *l; | |
1039 | struct acpiphp_func *func; | |
1040 | ||
1041 | list_for_each (l, &slot->funcs) { | |
1042 | func = list_entry(l, struct acpiphp_func, sibling); | |
1043 | ||
1044 | if (func->flags & FUNC_HAS_STA) { | |
1045 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
1046 | if (ACPI_SUCCESS(status) && sta) | |
1047 | break; | |
1048 | } else { | |
1049 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
1050 | PCI_DEVFN(slot->device, | |
1051 | func->function), | |
1052 | PCI_VENDOR_ID, &dvid); | |
1053 | if (dvid != 0xffffffff) { | |
1054 | sta = ACPI_STA_ALL; | |
1055 | break; | |
1056 | } | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | return (unsigned int)sta; | |
1061 | } | |
1062 | ||
8d50e332 RS |
1063 | /** |
1064 | * acpiphp_eject_slot - physically eject the slot | |
1065 | */ | |
1066 | static int acpiphp_eject_slot(struct acpiphp_slot *slot) | |
1067 | { | |
1068 | acpi_status status; | |
1069 | struct acpiphp_func *func; | |
1070 | struct list_head *l; | |
1071 | struct acpi_object_list arg_list; | |
1072 | union acpi_object arg; | |
1073 | ||
1074 | list_for_each (l, &slot->funcs) { | |
1075 | func = list_entry(l, struct acpiphp_func, sibling); | |
1076 | ||
1077 | /* We don't want to call _EJ0 on non-existing functions. */ | |
1078 | if ((func->flags & FUNC_HAS_EJ0)) { | |
1079 | /* _EJ0 method take one argument */ | |
1080 | arg_list.count = 1; | |
1081 | arg_list.pointer = &arg; | |
1082 | arg.type = ACPI_TYPE_INTEGER; | |
1083 | arg.integer.value = 1; | |
1084 | ||
1085 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
1086 | if (ACPI_FAILURE(status)) { | |
1087 | warn("%s: _EJ0 failed\n", __FUNCTION__); | |
1088 | return -1; | |
1089 | } else | |
1090 | break; | |
1091 | } | |
1092 | } | |
1093 | return 0; | |
1094 | } | |
1095 | ||
1da177e4 LT |
1096 | /** |
1097 | * acpiphp_check_bridge - re-enumerate devices | |
1098 | * | |
1099 | * Iterate over all slots under this bridge and make sure that if a | |
1100 | * card is present they are enabled, and if not they are disabled. | |
1101 | */ | |
1102 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
1103 | { | |
1104 | struct acpiphp_slot *slot; | |
1105 | int retval = 0; | |
1106 | int enabled, disabled; | |
1107 | ||
1108 | enabled = disabled = 0; | |
1109 | ||
1110 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1111 | unsigned int status = get_slot_status(slot); | |
1112 | if (slot->flags & SLOT_ENABLED) { | |
1113 | if (status == ACPI_STA_ALL) | |
1114 | continue; | |
1115 | retval = acpiphp_disable_slot(slot); | |
1116 | if (retval) { | |
1117 | err("Error occurred in disabling\n"); | |
1118 | goto err_exit; | |
8d50e332 RS |
1119 | } else { |
1120 | acpiphp_eject_slot(slot); | |
1da177e4 LT |
1121 | } |
1122 | disabled++; | |
1123 | } else { | |
1124 | if (status != ACPI_STA_ALL) | |
1125 | continue; | |
1126 | retval = acpiphp_enable_slot(slot); | |
1127 | if (retval) { | |
1128 | err("Error occurred in enabling\n"); | |
1129 | goto err_exit; | |
1130 | } | |
1131 | enabled++; | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | dbg("%s: %d enabled, %d disabled\n", __FUNCTION__, enabled, disabled); | |
1136 | ||
1137 | err_exit: | |
1138 | return retval; | |
1139 | } | |
1140 | ||
8e7561cf RS |
1141 | static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge) |
1142 | { | |
1143 | u16 pci_cmd, pci_bctl; | |
1144 | struct pci_dev *cdev; | |
1145 | ||
1146 | /* Program hpp values for this device */ | |
1147 | if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL || | |
1148 | (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE && | |
1149 | (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI))) | |
1150 | return; | |
1151 | pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, | |
1152 | bridge->hpp.cache_line_size); | |
1153 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, | |
1154 | bridge->hpp.latency_timer); | |
1155 | pci_read_config_word(dev, PCI_COMMAND, &pci_cmd); | |
1156 | if (bridge->hpp.enable_SERR) | |
1157 | pci_cmd |= PCI_COMMAND_SERR; | |
1158 | else | |
1159 | pci_cmd &= ~PCI_COMMAND_SERR; | |
1160 | if (bridge->hpp.enable_PERR) | |
1161 | pci_cmd |= PCI_COMMAND_PARITY; | |
1162 | else | |
1163 | pci_cmd &= ~PCI_COMMAND_PARITY; | |
1164 | pci_write_config_word(dev, PCI_COMMAND, pci_cmd); | |
1165 | ||
1166 | /* Program bridge control value and child devices */ | |
1167 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { | |
1168 | pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, | |
1169 | bridge->hpp.latency_timer); | |
1170 | pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); | |
1171 | if (bridge->hpp.enable_SERR) | |
1172 | pci_bctl |= PCI_BRIDGE_CTL_SERR; | |
1173 | else | |
1174 | pci_bctl &= ~PCI_BRIDGE_CTL_SERR; | |
1175 | if (bridge->hpp.enable_PERR) | |
1176 | pci_bctl |= PCI_BRIDGE_CTL_PARITY; | |
1177 | else | |
1178 | pci_bctl &= ~PCI_BRIDGE_CTL_PARITY; | |
1179 | pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl); | |
1180 | if (dev->subordinate) { | |
1181 | list_for_each_entry(cdev, &dev->subordinate->devices, | |
1182 | bus_list) | |
1183 | program_hpp(cdev, bridge); | |
1184 | } | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus) | |
1189 | { | |
1190 | struct acpiphp_bridge bridge; | |
1191 | struct pci_dev *dev; | |
1192 | ||
1193 | memset(&bridge, 0, sizeof(bridge)); | |
1194 | bridge.handle = handle; | |
1195 | decode_hpp(&bridge); | |
1196 | list_for_each_entry(dev, &bus->devices, bus_list) | |
1197 | program_hpp(dev, &bridge); | |
1198 | ||
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * Remove devices for which we could not assign resources, call | |
1203 | * arch specific code to fix-up the bus | |
1204 | */ | |
1205 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
1206 | { | |
1207 | struct pci_dev *dev; | |
1208 | int i; | |
1209 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
1210 | ||
1211 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1212 | for (i=0; i<PCI_BRIDGE_RESOURCES; i++) { | |
1213 | struct resource *res = &dev->resource[i]; | |
1214 | if ((res->flags & type_mask) && !res->start && | |
1215 | res->end) { | |
1216 | /* Could not assign a required resources | |
1217 | * for this device, remove it */ | |
1218 | pci_remove_bus_device(dev); | |
1219 | break; | |
1220 | } | |
1221 | } | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | /* Program resources in newly inserted bridge */ | |
1226 | static int acpiphp_configure_bridge (acpi_handle handle) | |
1227 | { | |
1228 | struct acpi_pci_id pci_id; | |
1229 | struct pci_bus *bus; | |
1230 | ||
1231 | if (ACPI_FAILURE(acpi_get_pci_id(handle, &pci_id))) { | |
1232 | err("cannot get PCI domain and bus number for bridge\n"); | |
1233 | return -EINVAL; | |
1234 | } | |
1235 | bus = pci_find_bus(pci_id.segment, pci_id.bus); | |
1236 | if (!bus) { | |
1237 | err("cannot find bus %d:%d\n", | |
1238 | pci_id.segment, pci_id.bus); | |
1239 | return -EINVAL; | |
1240 | } | |
1241 | ||
1242 | pci_bus_size_bridges(bus); | |
1243 | pci_bus_assign_resources(bus); | |
1244 | acpiphp_sanitize_bus(bus); | |
1245 | acpiphp_set_hpp_values(handle, bus); | |
1246 | pci_enable_bridges(bus); | |
a0d399a8 | 1247 | acpiphp_configure_ioapics(handle); |
8e7561cf RS |
1248 | return 0; |
1249 | } | |
1250 | ||
1251 | static void handle_bridge_insertion(acpi_handle handle, u32 type) | |
1252 | { | |
1253 | struct acpi_device *device, *pdevice; | |
1254 | acpi_handle phandle; | |
1255 | ||
1256 | if ((type != ACPI_NOTIFY_BUS_CHECK) && | |
1257 | (type != ACPI_NOTIFY_DEVICE_CHECK)) { | |
1258 | err("unexpected notification type %d\n", type); | |
1259 | return; | |
1260 | } | |
1261 | ||
1262 | acpi_get_parent(handle, &phandle); | |
1263 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1264 | dbg("no parent device, assuming NULL\n"); | |
1265 | pdevice = NULL; | |
1266 | } | |
1267 | if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) { | |
1268 | err("cannot add bridge to acpi list\n"); | |
1269 | return; | |
1270 | } | |
1271 | if (!acpiphp_configure_bridge(handle) && | |
1272 | !acpi_bus_start(device)) | |
1273 | add_bridge(handle); | |
1274 | else | |
1275 | err("cannot configure and start bridge\n"); | |
1276 | ||
1277 | } | |
1278 | ||
1da177e4 LT |
1279 | /* |
1280 | * ACPI event handlers | |
1281 | */ | |
1282 | ||
1283 | /** | |
1284 | * handle_hotplug_event_bridge - handle ACPI event on bridges | |
1285 | * | |
1286 | * @handle: Notify()'ed acpi_handle | |
1287 | * @type: Notify code | |
1288 | * @context: pointer to acpiphp_bridge structure | |
1289 | * | |
1290 | * handles ACPI event notification on {host,p2p} bridges | |
1291 | * | |
1292 | */ | |
1293 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) | |
1294 | { | |
1295 | struct acpiphp_bridge *bridge; | |
1296 | char objname[64]; | |
1297 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1298 | .pointer = objname }; | |
8e7561cf | 1299 | struct acpi_device *device; |
1da177e4 | 1300 | |
8e7561cf RS |
1301 | if (acpi_bus_get_device(handle, &device)) { |
1302 | /* This bridge must have just been physically inserted */ | |
1303 | handle_bridge_insertion(handle, type); | |
1304 | return; | |
1305 | } | |
1306 | ||
1307 | bridge = acpiphp_handle_to_bridge(handle); | |
1308 | if (!bridge) { | |
1309 | err("cannot get bridge info\n"); | |
1310 | return; | |
1311 | } | |
1da177e4 LT |
1312 | |
1313 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1314 | ||
1315 | switch (type) { | |
1316 | case ACPI_NOTIFY_BUS_CHECK: | |
1317 | /* bus re-enumerate */ | |
1318 | dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname); | |
1319 | acpiphp_check_bridge(bridge); | |
1320 | break; | |
1321 | ||
1322 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1323 | /* device check */ | |
1324 | dbg("%s: Device check notify on %s\n", __FUNCTION__, objname); | |
1325 | acpiphp_check_bridge(bridge); | |
1326 | break; | |
1327 | ||
1328 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1329 | /* wake event */ | |
1330 | dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname); | |
1331 | break; | |
1332 | ||
1333 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1334 | /* request device eject */ | |
1335 | dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname); | |
1336 | break; | |
1337 | ||
1338 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1339 | printk(KERN_ERR "Device %s cannot be configured due" | |
1340 | " to a frequency mismatch\n", objname); | |
1341 | break; | |
1342 | ||
1343 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1344 | printk(KERN_ERR "Device %s cannot be configured due" | |
1345 | " to a bus mode mismatch\n", objname); | |
1346 | break; | |
1347 | ||
1348 | case ACPI_NOTIFY_POWER_FAULT: | |
1349 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1350 | objname); | |
1351 | break; | |
1352 | ||
1353 | default: | |
1354 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1355 | break; | |
1356 | } | |
1357 | } | |
1358 | ||
1da177e4 LT |
1359 | /** |
1360 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1361 | * | |
1362 | * @handle: Notify()'ed acpi_handle | |
1363 | * @type: Notify code | |
1364 | * @context: pointer to acpiphp_func structure | |
1365 | * | |
1366 | * handles ACPI event notification on slots | |
1367 | * | |
1368 | */ | |
20416ea5 | 1369 | void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) |
1da177e4 LT |
1370 | { |
1371 | struct acpiphp_func *func; | |
1372 | char objname[64]; | |
1373 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1374 | .pointer = objname }; | |
1375 | ||
1376 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1377 | ||
1378 | func = (struct acpiphp_func *)context; | |
1379 | ||
1380 | switch (type) { | |
1381 | case ACPI_NOTIFY_BUS_CHECK: | |
1382 | /* bus re-enumerate */ | |
1383 | dbg("%s: Bus check notify on %s\n", __FUNCTION__, objname); | |
1384 | acpiphp_enable_slot(func->slot); | |
1385 | break; | |
1386 | ||
1387 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1388 | /* device check : re-enumerate from parent bus */ | |
1389 | dbg("%s: Device check notify on %s\n", __FUNCTION__, objname); | |
1390 | acpiphp_check_bridge(func->slot->bridge); | |
1391 | break; | |
1392 | ||
1393 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1394 | /* wake event */ | |
1395 | dbg("%s: Device wake notify on %s\n", __FUNCTION__, objname); | |
1396 | break; | |
1397 | ||
1398 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1399 | /* request device eject */ | |
1400 | dbg("%s: Device eject notify on %s\n", __FUNCTION__, objname); | |
8d50e332 RS |
1401 | if (!(acpiphp_disable_slot(func->slot))) |
1402 | acpiphp_eject_slot(func->slot); | |
1da177e4 LT |
1403 | break; |
1404 | ||
1405 | default: | |
1406 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1407 | break; | |
1408 | } | |
1409 | } | |
1410 | ||
8e7561cf RS |
1411 | static int is_root_bridge(acpi_handle handle) |
1412 | { | |
1413 | acpi_status status; | |
1414 | struct acpi_device_info *info; | |
1415 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1416 | int i; | |
1417 | ||
1418 | status = acpi_get_object_info(handle, &buffer); | |
1419 | if (ACPI_SUCCESS(status)) { | |
1420 | info = buffer.pointer; | |
1421 | if ((info->valid & ACPI_VALID_HID) && | |
1422 | !strcmp(PCI_ROOT_HID_STRING, | |
1423 | info->hardware_id.value)) { | |
1424 | acpi_os_free(buffer.pointer); | |
1425 | return 1; | |
1426 | } | |
1427 | if (info->valid & ACPI_VALID_CID) { | |
1428 | for (i=0; i < info->compatibility_id.count; i++) { | |
1429 | if (!strcmp(PCI_ROOT_HID_STRING, | |
1430 | info->compatibility_id.id[i].value)) { | |
1431 | acpi_os_free(buffer.pointer); | |
1432 | return 1; | |
1433 | } | |
1434 | } | |
1435 | } | |
1436 | } | |
1437 | return 0; | |
1438 | } | |
1439 | ||
1440 | static acpi_status | |
1441 | find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1442 | { | |
1443 | int *count = (int *)context; | |
1444 | ||
1445 | if (is_root_bridge(handle)) { | |
1446 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
1447 | handle_hotplug_event_bridge, NULL); | |
1448 | (*count)++; | |
1449 | } | |
1450 | return AE_OK ; | |
1451 | } | |
1da177e4 LT |
1452 | |
1453 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1454 | .add = add_bridge, | |
1455 | .remove = remove_bridge, | |
1456 | }; | |
1457 | ||
1458 | /** | |
1459 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1460 | * | |
1461 | */ | |
1462 | int __init acpiphp_glue_init(void) | |
1463 | { | |
8e7561cf | 1464 | int num = 0; |
1da177e4 | 1465 | |
8e7561cf RS |
1466 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
1467 | ACPI_UINT32_MAX, find_root_bridges, &num, NULL); | |
1da177e4 LT |
1468 | |
1469 | if (num <= 0) | |
1470 | return -1; | |
8e7561cf RS |
1471 | else |
1472 | acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1da177e4 LT |
1473 | |
1474 | return 0; | |
1475 | } | |
1476 | ||
1477 | ||
1478 | /** | |
1479 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1480 | * | |
1481 | * This function frees all data allocated in acpiphp_glue_init() | |
1482 | */ | |
1483 | void __exit acpiphp_glue_exit(void) | |
1484 | { | |
1da177e4 LT |
1485 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); |
1486 | } | |
1487 | ||
1488 | ||
1489 | /** | |
1490 | * acpiphp_get_num_slots - count number of slots in a system | |
1491 | */ | |
1492 | int __init acpiphp_get_num_slots(void) | |
1493 | { | |
1494 | struct list_head *node; | |
1495 | struct acpiphp_bridge *bridge; | |
1496 | int num_slots; | |
1497 | ||
1498 | num_slots = 0; | |
1499 | ||
1500 | list_for_each (node, &bridge_list) { | |
1501 | bridge = (struct acpiphp_bridge *)node; | |
42f49a6a RS |
1502 | dbg("Bus %04x:%02x has %d slot%s\n", |
1503 | pci_domain_nr(bridge->pci_bus), | |
1504 | bridge->pci_bus->number, bridge->nr_slots, | |
1505 | bridge->nr_slots == 1 ? "" : "s"); | |
1da177e4 LT |
1506 | num_slots += bridge->nr_slots; |
1507 | } | |
1508 | ||
42f49a6a | 1509 | dbg("Total %d slots\n", num_slots); |
1da177e4 LT |
1510 | return num_slots; |
1511 | } | |
1512 | ||
1513 | ||
1514 | #if 0 | |
1515 | /** | |
1516 | * acpiphp_for_each_slot - call function for each slot | |
1517 | * @fn: callback function | |
1518 | * @data: context to be passed to callback function | |
1519 | * | |
1520 | */ | |
1521 | static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) | |
1522 | { | |
1523 | struct list_head *node; | |
1524 | struct acpiphp_bridge *bridge; | |
1525 | struct acpiphp_slot *slot; | |
1526 | int retval = 0; | |
1527 | ||
1528 | list_for_each (node, &bridge_list) { | |
1529 | bridge = (struct acpiphp_bridge *)node; | |
1530 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1531 | retval = fn(slot, data); | |
1532 | if (!retval) | |
1533 | goto err_exit; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | err_exit: | |
1538 | return retval; | |
1539 | } | |
1540 | #endif | |
1541 | ||
1da177e4 LT |
1542 | |
1543 | /** | |
1544 | * acpiphp_enable_slot - power on slot | |
1545 | */ | |
1546 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1547 | { | |
1548 | int retval; | |
1549 | ||
6aa4cdd0 | 1550 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1551 | |
1552 | /* wake up all functions */ | |
1553 | retval = power_on_slot(slot); | |
1554 | if (retval) | |
1555 | goto err_exit; | |
1556 | ||
1557 | if (get_slot_status(slot) == ACPI_STA_ALL) | |
1558 | /* configure all functions */ | |
1559 | retval = enable_device(slot); | |
1560 | ||
1561 | err_exit: | |
6aa4cdd0 | 1562 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1563 | return retval; |
1564 | } | |
1565 | ||
1da177e4 LT |
1566 | /** |
1567 | * acpiphp_disable_slot - power off slot | |
1568 | */ | |
1569 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1570 | { | |
1571 | int retval = 0; | |
1572 | ||
6aa4cdd0 | 1573 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1574 | |
1575 | /* unconfigure all functions */ | |
1576 | retval = disable_device(slot); | |
1577 | if (retval) | |
1578 | goto err_exit; | |
1579 | ||
1580 | /* power off all functions */ | |
1581 | retval = power_off_slot(slot); | |
1582 | if (retval) | |
1583 | goto err_exit; | |
1584 | ||
1da177e4 | 1585 | err_exit: |
6aa4cdd0 | 1586 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1587 | return retval; |
1588 | } | |
1589 | ||
1590 | ||
1591 | /* | |
1592 | * slot enabled: 1 | |
1593 | * slot disabled: 0 | |
1594 | */ | |
1595 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1596 | { | |
8d50e332 | 1597 | return (slot->flags & SLOT_POWEREDON); |
1da177e4 LT |
1598 | } |
1599 | ||
1600 | ||
1601 | /* | |
1602 | * latch closed: 1 | |
1603 | * latch open: 0 | |
1604 | */ | |
1605 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1606 | { | |
1607 | unsigned int sta; | |
1608 | ||
1609 | sta = get_slot_status(slot); | |
1610 | ||
1611 | return (sta & ACPI_STA_SHOW_IN_UI) ? 1 : 0; | |
1612 | } | |
1613 | ||
1614 | ||
1615 | /* | |
1616 | * adapter presence : 1 | |
1617 | * absence : 0 | |
1618 | */ | |
1619 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1620 | { | |
1621 | unsigned int sta; | |
1622 | ||
1623 | sta = get_slot_status(slot); | |
1624 | ||
1625 | return (sta == 0) ? 0 : 1; | |
1626 | } | |
1627 | ||
1628 | ||
1629 | /* | |
1630 | * pci address (seg/bus/dev) | |
1631 | */ | |
1632 | u32 acpiphp_get_address(struct acpiphp_slot *slot) | |
1633 | { | |
1634 | u32 address; | |
42f49a6a | 1635 | struct pci_bus *pci_bus = slot->bridge->pci_bus; |
1da177e4 | 1636 | |
42f49a6a RS |
1637 | address = (pci_domain_nr(pci_bus) << 16) | |
1638 | (pci_bus->number << 8) | | |
1da177e4 LT |
1639 | slot->device; |
1640 | ||
1641 | return address; | |
1642 | } |