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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 | * | |
998be20f | 29 | * Send feedback to <kristen.c.accardi@intel.com> |
1da177e4 LT |
30 | * |
31 | */ | |
32 | ||
42f49a6a RS |
33 | /* |
34 | * Lifetime rules for pci_dev: | |
42f49a6a RS |
35 | * - The one in acpiphp_bridge has its refcount elevated by pci_get_slot() |
36 | * when the bridge is scanned and it loses a refcount when the bridge | |
37 | * is removed. | |
5d4a4b25 AC |
38 | * - When a P2P bridge is present, we elevate the refcount on the subordinate |
39 | * bus. It loses the refcount when the the driver unloads. | |
42f49a6a RS |
40 | */ |
41 | ||
1da177e4 LT |
42 | #include <linux/init.h> |
43 | #include <linux/module.h> | |
44 | ||
45 | #include <linux/kernel.h> | |
46 | #include <linux/pci.h> | |
7a54f25c | 47 | #include <linux/pci_hotplug.h> |
e8c331e9 | 48 | #include <linux/pci-acpi.h> |
6aa4cdd0 | 49 | #include <linux/mutex.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
1da177e4 LT |
51 | |
52 | #include "../pci.h" | |
1da177e4 LT |
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 | 60 | static void acpiphp_sanitize_bus(struct pci_bus *bus); |
fca6825a | 61 | static void acpiphp_set_hpp_values(struct pci_bus *bus); |
2b85e130 | 62 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context); |
8e5dce35 | 63 | |
5a340ed8 | 64 | /* callback routine to check for the existence of a pci dock device */ |
4e8662bb KA |
65 | static acpi_status |
66 | is_pci_dock_device(acpi_handle handle, u32 lvl, void *context, void **rv) | |
67 | { | |
68 | int *count = (int *)context; | |
69 | ||
70 | if (is_dock_device(handle)) { | |
71 | (*count)++; | |
72 | return AE_CTRL_TERMINATE; | |
73 | } else { | |
74 | return AE_OK; | |
75 | } | |
76 | } | |
77 | ||
4e8662bb KA |
78 | /* |
79 | * the _DCK method can do funny things... and sometimes not | |
80 | * hah-hah funny. | |
81 | * | |
82 | * TBD - figure out a way to only call fixups for | |
83 | * systems that require them. | |
84 | */ | |
85 | static int post_dock_fixups(struct notifier_block *nb, unsigned long val, | |
86 | void *v) | |
87 | { | |
88 | struct acpiphp_func *func = container_of(nb, struct acpiphp_func, nb); | |
89 | struct pci_bus *bus = func->slot->bridge->pci_bus; | |
90 | u32 buses; | |
91 | ||
92 | if (!bus->self) | |
93 | return NOTIFY_OK; | |
94 | ||
95 | /* fixup bad _DCK function that rewrites | |
96 | * secondary bridge on slot | |
97 | */ | |
98 | pci_read_config_dword(bus->self, | |
99 | PCI_PRIMARY_BUS, | |
100 | &buses); | |
101 | ||
102 | if (((buses >> 8) & 0xff) != bus->secondary) { | |
103 | buses = (buses & 0xff000000) | |
2a9d3521 AC |
104 | | ((unsigned int)(bus->primary) << 0) |
105 | | ((unsigned int)(bus->secondary) << 8) | |
106 | | ((unsigned int)(bus->subordinate) << 16); | |
4e8662bb KA |
107 | pci_write_config_dword(bus->self, PCI_PRIMARY_BUS, buses); |
108 | } | |
109 | return NOTIFY_OK; | |
110 | } | |
111 | ||
112 | ||
1253f7aa SL |
113 | static struct acpi_dock_ops acpiphp_dock_ops = { |
114 | .handler = handle_hotplug_event_func, | |
115 | }; | |
1da177e4 LT |
116 | |
117 | /* callback routine to register each ACPI PCI slot object */ | |
118 | static acpi_status | |
119 | register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
120 | { | |
121 | struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; | |
122 | struct acpiphp_slot *slot; | |
123 | struct acpiphp_func *newfunc; | |
124 | acpi_handle tmp; | |
125 | acpi_status status = AE_OK; | |
27663c58 | 126 | unsigned long long adr, sun; |
e27da381 | 127 | int device, function, retval; |
e8c331e9 | 128 | struct pci_bus *pbus = bridge->pci_bus; |
9d911d79 | 129 | struct pci_dev *pdev; |
1da177e4 | 130 | |
e8c331e9 | 131 | if (!acpi_pci_check_ejectable(pbus, handle) && !is_dock_device(handle)) |
1da177e4 LT |
132 | return AE_OK; |
133 | ||
56ee325e | 134 | acpi_evaluate_integer(handle, "_ADR", NULL, &adr); |
1da177e4 LT |
135 | device = (adr >> 16) & 0xffff; |
136 | function = adr & 0xffff; | |
137 | ||
f5afe806 | 138 | newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL); |
1da177e4 LT |
139 | if (!newfunc) |
140 | return AE_NO_MEMORY; | |
1da177e4 LT |
141 | |
142 | INIT_LIST_HEAD(&newfunc->sibling); | |
143 | newfunc->handle = handle; | |
144 | newfunc->function = function; | |
56ee325e MG |
145 | |
146 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp))) | |
20416ea5 | 147 | newfunc->flags = FUNC_HAS_EJ0; |
1da177e4 LT |
148 | |
149 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) | |
150 | newfunc->flags |= FUNC_HAS_STA; | |
151 | ||
152 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp))) | |
153 | newfunc->flags |= FUNC_HAS_PS0; | |
154 | ||
155 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) | |
156 | newfunc->flags |= FUNC_HAS_PS3; | |
157 | ||
4e8662bb | 158 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) |
20416ea5 | 159 | newfunc->flags |= FUNC_HAS_DCK; |
20416ea5 | 160 | |
1da177e4 | 161 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); |
95b38b3f KA |
162 | if (ACPI_FAILURE(status)) { |
163 | /* | |
164 | * use the count of the number of slots we've found | |
165 | * for the number of the slot | |
166 | */ | |
167 | sun = bridge->nr_slots+1; | |
168 | } | |
1da177e4 LT |
169 | |
170 | /* search for objects that share the same slot */ | |
171 | for (slot = bridge->slots; slot; slot = slot->next) | |
172 | if (slot->device == device) { | |
173 | if (slot->sun != sun) | |
174 | warn("sibling found, but _SUN doesn't match!\n"); | |
175 | break; | |
176 | } | |
177 | ||
178 | if (!slot) { | |
f5afe806 | 179 | slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); |
1da177e4 LT |
180 | if (!slot) { |
181 | kfree(newfunc); | |
182 | return AE_NO_MEMORY; | |
183 | } | |
184 | ||
1da177e4 | 185 | slot->bridge = bridge; |
1da177e4 LT |
186 | slot->device = device; |
187 | slot->sun = sun; | |
188 | INIT_LIST_HEAD(&slot->funcs); | |
6aa4cdd0 | 189 | mutex_init(&slot->crit_sect); |
1da177e4 LT |
190 | |
191 | slot->next = bridge->slots; | |
192 | bridge->slots = slot; | |
193 | ||
194 | bridge->nr_slots++; | |
195 | ||
b6adc195 | 196 | dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n", |
e8c331e9 | 197 | slot->sun, pci_domain_nr(pbus), pbus->number, device); |
e27da381 MT |
198 | retval = acpiphp_register_hotplug_slot(slot); |
199 | if (retval) { | |
f46753c5 | 200 | if (retval == -EBUSY) |
b6adc195 | 201 | warn("Slot %llu already registered by another " |
f46753c5 AC |
202 | "hotplug driver\n", slot->sun); |
203 | else | |
204 | warn("acpiphp_register_hotplug_slot failed " | |
205 | "(err code = 0x%x)\n", retval); | |
e27da381 MT |
206 | goto err_exit; |
207 | } | |
1da177e4 LT |
208 | } |
209 | ||
210 | newfunc->slot = slot; | |
211 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
212 | ||
9d911d79 AC |
213 | pdev = pci_get_slot(pbus, PCI_DEVFN(device, function)); |
214 | if (pdev) { | |
1da177e4 | 215 | slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); |
9d911d79 | 216 | pci_dev_put(pdev); |
1da177e4 LT |
217 | } |
218 | ||
4e8662bb KA |
219 | if (is_dock_device(handle)) { |
220 | /* we don't want to call this device's _EJ0 | |
221 | * because we want the dock notify handler | |
222 | * to call it after it calls _DCK | |
20416ea5 KA |
223 | */ |
224 | newfunc->flags &= ~FUNC_HAS_EJ0; | |
4e8662bb | 225 | if (register_hotplug_dock_device(handle, |
1253f7aa | 226 | &acpiphp_dock_ops, newfunc)) |
4e8662bb KA |
227 | dbg("failed to register dock device\n"); |
228 | ||
229 | /* we need to be notified when dock events happen | |
230 | * outside of the hotplug operation, since we may | |
231 | * need to do fixups before we can hotplug. | |
232 | */ | |
233 | newfunc->nb.notifier_call = post_dock_fixups; | |
234 | if (register_dock_notifier(&newfunc->nb)) | |
235 | dbg("failed to register a dock notifier"); | |
20416ea5 KA |
236 | } |
237 | ||
1da177e4 | 238 | /* install notify handler */ |
20416ea5 KA |
239 | if (!(newfunc->flags & FUNC_HAS_DCK)) { |
240 | status = acpi_install_notify_handler(handle, | |
1da177e4 LT |
241 | ACPI_SYSTEM_NOTIFY, |
242 | handle_hotplug_event_func, | |
243 | newfunc); | |
244 | ||
20416ea5 KA |
245 | if (ACPI_FAILURE(status)) |
246 | err("failed to register interrupt notify handler\n"); | |
247 | } else | |
248 | status = AE_OK; | |
1da177e4 | 249 | |
20416ea5 | 250 | return status; |
e27da381 MT |
251 | |
252 | err_exit: | |
253 | bridge->nr_slots--; | |
254 | bridge->slots = slot->next; | |
255 | kfree(slot); | |
256 | kfree(newfunc); | |
257 | ||
258 | return AE_OK; | |
1da177e4 LT |
259 | } |
260 | ||
261 | ||
262 | /* see if it's worth looking at this bridge */ | |
6edd7679 | 263 | static int detect_ejectable_slots(acpi_handle handle) |
1da177e4 | 264 | { |
7f538669 | 265 | int found = acpi_pci_detect_ejectable(handle); |
e8c331e9 | 266 | if (!found) { |
6edd7679 | 267 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, |
2263576c | 268 | is_pci_dock_device, NULL, (void *)&found, NULL); |
e8c331e9 KK |
269 | } |
270 | return found; | |
1da177e4 LT |
271 | } |
272 | ||
1da177e4 LT |
273 | /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ |
274 | static void init_bridge_misc(struct acpiphp_bridge *bridge) | |
275 | { | |
276 | acpi_status status; | |
277 | ||
e27da381 MT |
278 | /* must be added to the list prior to calling register_slot */ |
279 | list_add(&bridge->list, &bridge_list); | |
280 | ||
1da177e4 LT |
281 | /* register all slot objects under this bridge */ |
282 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, | |
2263576c | 283 | register_slot, NULL, bridge, NULL); |
e27da381 MT |
284 | if (ACPI_FAILURE(status)) { |
285 | list_del(&bridge->list); | |
286 | return; | |
287 | } | |
1da177e4 LT |
288 | |
289 | /* install notify handler */ | |
8e7561cf | 290 | if (bridge->type != BRIDGE_TYPE_HOST) { |
551bcb75 MT |
291 | if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) { |
292 | status = acpi_remove_notify_handler(bridge->func->handle, | |
293 | ACPI_SYSTEM_NOTIFY, | |
294 | handle_hotplug_event_func); | |
295 | if (ACPI_FAILURE(status)) | |
296 | err("failed to remove notify handler\n"); | |
297 | } | |
8e7561cf | 298 | status = acpi_install_notify_handler(bridge->handle, |
1da177e4 LT |
299 | ACPI_SYSTEM_NOTIFY, |
300 | handle_hotplug_event_bridge, | |
301 | bridge); | |
302 | ||
8e7561cf RS |
303 | if (ACPI_FAILURE(status)) { |
304 | err("failed to register interrupt notify handler\n"); | |
305 | } | |
1da177e4 | 306 | } |
1da177e4 LT |
307 | } |
308 | ||
309 | ||
551bcb75 MT |
310 | /* find acpiphp_func from acpiphp_bridge */ |
311 | static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle) | |
312 | { | |
551bcb75 MT |
313 | struct acpiphp_bridge *bridge; |
314 | struct acpiphp_slot *slot; | |
315 | struct acpiphp_func *func; | |
316 | ||
58c08628 | 317 | list_for_each_entry(bridge, &bridge_list, list) { |
551bcb75 | 318 | for (slot = bridge->slots; slot; slot = slot->next) { |
58c08628 | 319 | list_for_each_entry(func, &slot->funcs, sibling) { |
551bcb75 MT |
320 | if (func->handle == handle) |
321 | return func; | |
322 | } | |
323 | } | |
324 | } | |
325 | ||
326 | return NULL; | |
327 | } | |
328 | ||
329 | ||
330 | static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge) | |
331 | { | |
332 | acpi_handle dummy_handle; | |
333 | ||
334 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
335 | "_STA", &dummy_handle))) | |
336 | bridge->flags |= BRIDGE_HAS_STA; | |
337 | ||
338 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
339 | "_EJ0", &dummy_handle))) | |
340 | bridge->flags |= BRIDGE_HAS_EJ0; | |
341 | ||
342 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
343 | "_PS0", &dummy_handle))) | |
344 | bridge->flags |= BRIDGE_HAS_PS0; | |
345 | ||
346 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
347 | "_PS3", &dummy_handle))) | |
348 | bridge->flags |= BRIDGE_HAS_PS3; | |
349 | ||
350 | /* is this ejectable p2p bridge? */ | |
351 | if (bridge->flags & BRIDGE_HAS_EJ0) { | |
352 | struct acpiphp_func *func; | |
353 | ||
354 | dbg("found ejectable p2p bridge\n"); | |
355 | ||
356 | /* make link between PCI bridge and PCI function */ | |
357 | func = acpiphp_bridge_handle_to_function(bridge->handle); | |
358 | if (!func) | |
359 | return; | |
360 | bridge->func = func; | |
361 | func->bridge = bridge; | |
362 | } | |
363 | } | |
364 | ||
365 | ||
1da177e4 | 366 | /* allocate and initialize host bridge data structure */ |
6edd7679 | 367 | static void add_host_bridge(acpi_handle *handle) |
1da177e4 | 368 | { |
1da177e4 | 369 | struct acpiphp_bridge *bridge; |
6edd7679 | 370 | struct acpi_pci_root *root = acpi_pci_find_root(handle); |
1da177e4 | 371 | |
f5afe806 | 372 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
373 | if (bridge == NULL) |
374 | return; | |
375 | ||
1da177e4 LT |
376 | bridge->type = BRIDGE_TYPE_HOST; |
377 | bridge->handle = handle; | |
1da177e4 | 378 | |
6edd7679 | 379 | bridge->pci_bus = root->bus; |
1da177e4 LT |
380 | |
381 | spin_lock_init(&bridge->res_lock); | |
382 | ||
1da177e4 LT |
383 | init_bridge_misc(bridge); |
384 | } | |
385 | ||
386 | ||
387 | /* allocate and initialize PCI-to-PCI bridge data structure */ | |
6edd7679 | 388 | static void add_p2p_bridge(acpi_handle *handle) |
1da177e4 LT |
389 | { |
390 | struct acpiphp_bridge *bridge; | |
1da177e4 | 391 | |
f5afe806 | 392 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
393 | if (bridge == NULL) { |
394 | err("out of memory\n"); | |
395 | return; | |
396 | } | |
397 | ||
1da177e4 LT |
398 | bridge->type = BRIDGE_TYPE_P2P; |
399 | bridge->handle = handle; | |
551bcb75 | 400 | config_p2p_bridge_flags(bridge); |
1da177e4 | 401 | |
6edd7679 AC |
402 | bridge->pci_dev = acpi_get_pci_dev(handle); |
403 | bridge->pci_bus = bridge->pci_dev->subordinate; | |
1da177e4 LT |
404 | if (!bridge->pci_bus) { |
405 | err("This is not a PCI-to-PCI bridge!\n"); | |
42f49a6a | 406 | goto err; |
1da177e4 LT |
407 | } |
408 | ||
5d4a4b25 AC |
409 | /* |
410 | * Grab a ref to the subordinate PCI bus in case the bus is | |
411 | * removed via PCI core logical hotplug. The ref pins the bus | |
412 | * (which we access during module unload). | |
413 | */ | |
414 | get_device(&bridge->pci_bus->dev); | |
1da177e4 LT |
415 | spin_lock_init(&bridge->res_lock); |
416 | ||
1da177e4 | 417 | init_bridge_misc(bridge); |
42f49a6a RS |
418 | return; |
419 | err: | |
6edd7679 | 420 | pci_dev_put(bridge->pci_dev); |
42f49a6a RS |
421 | kfree(bridge); |
422 | return; | |
1da177e4 LT |
423 | } |
424 | ||
425 | ||
426 | /* callback routine to find P2P bridges */ | |
427 | static acpi_status | |
428 | find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
429 | { | |
430 | acpi_status status; | |
1da177e4 | 431 | struct pci_dev *dev; |
1da177e4 | 432 | |
6edd7679 | 433 | dev = acpi_get_pci_dev(handle); |
42f49a6a RS |
434 | if (!dev || !dev->subordinate) |
435 | goto out; | |
1da177e4 LT |
436 | |
437 | /* check if this bridge has ejectable slots */ | |
6edd7679 | 438 | if ((detect_ejectable_slots(handle) > 0)) { |
1da177e4 | 439 | dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); |
6edd7679 | 440 | add_p2p_bridge(handle); |
1da177e4 LT |
441 | } |
442 | ||
7c8f25da KK |
443 | /* search P2P bridges under this p2p bridge */ |
444 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
2263576c | 445 | find_p2p_bridge, NULL, NULL, NULL); |
7c8f25da | 446 | if (ACPI_FAILURE(status)) |
551bcb75 | 447 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
7c8f25da | 448 | |
42f49a6a RS |
449 | out: |
450 | pci_dev_put(dev); | |
1da177e4 LT |
451 | return AE_OK; |
452 | } | |
453 | ||
454 | ||
455 | /* find hot-pluggable slots, and then find P2P bridge */ | |
456 | static int add_bridge(acpi_handle handle) | |
457 | { | |
458 | acpi_status status; | |
27663c58 | 459 | unsigned long long tmp; |
1da177e4 LT |
460 | acpi_handle dummy_handle; |
461 | ||
462 | /* if the bridge doesn't have _STA, we assume it is always there */ | |
463 | status = acpi_get_handle(handle, "_STA", &dummy_handle); | |
464 | if (ACPI_SUCCESS(status)) { | |
465 | status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); | |
466 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 467 | dbg("%s: _STA evaluation failure\n", __func__); |
1da177e4 LT |
468 | return 0; |
469 | } | |
470 | if ((tmp & ACPI_STA_FUNCTIONING) == 0) | |
471 | /* don't register this object */ | |
472 | return 0; | |
473 | } | |
474 | ||
1da177e4 | 475 | /* check if this bridge has ejectable slots */ |
6edd7679 | 476 | if (detect_ejectable_slots(handle) > 0) { |
1da177e4 | 477 | dbg("found PCI host-bus bridge with hot-pluggable slots\n"); |
6edd7679 | 478 | add_host_bridge(handle); |
1da177e4 LT |
479 | } |
480 | ||
1da177e4 LT |
481 | /* search P2P bridges under this host bridge */ |
482 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
2263576c | 483 | find_p2p_bridge, NULL, NULL, NULL); |
1da177e4 LT |
484 | |
485 | if (ACPI_FAILURE(status)) | |
551bcb75 | 486 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
1da177e4 LT |
487 | |
488 | return 0; | |
489 | } | |
490 | ||
42f49a6a RS |
491 | static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle) |
492 | { | |
58c08628 AC |
493 | struct acpiphp_bridge *bridge; |
494 | ||
495 | list_for_each_entry(bridge, &bridge_list, list) | |
42f49a6a RS |
496 | if (bridge->handle == handle) |
497 | return bridge; | |
42f49a6a RS |
498 | |
499 | return NULL; | |
500 | } | |
1da177e4 | 501 | |
364d5094 | 502 | static void cleanup_bridge(struct acpiphp_bridge *bridge) |
1da177e4 | 503 | { |
58c08628 AC |
504 | struct acpiphp_slot *slot, *next; |
505 | struct acpiphp_func *func, *tmp; | |
42f49a6a | 506 | acpi_status status; |
364d5094 | 507 | acpi_handle handle = bridge->handle; |
42f49a6a RS |
508 | |
509 | status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
510 | handle_hotplug_event_bridge); | |
511 | if (ACPI_FAILURE(status)) | |
512 | err("failed to remove notify handler\n"); | |
513 | ||
551bcb75 MT |
514 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
515 | ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) { | |
516 | status = acpi_install_notify_handler(bridge->func->handle, | |
517 | ACPI_SYSTEM_NOTIFY, | |
518 | handle_hotplug_event_func, | |
519 | bridge->func); | |
520 | if (ACPI_FAILURE(status)) | |
521 | err("failed to install interrupt notify handler\n"); | |
522 | } | |
523 | ||
42f49a6a RS |
524 | slot = bridge->slots; |
525 | while (slot) { | |
58c08628 AC |
526 | next = slot->next; |
527 | list_for_each_entry_safe(func, tmp, &slot->funcs, sibling) { | |
4e8662bb KA |
528 | if (is_dock_device(func->handle)) { |
529 | unregister_hotplug_dock_device(func->handle); | |
530 | unregister_dock_notifier(&func->nb); | |
531 | } | |
20416ea5 KA |
532 | if (!(func->flags & FUNC_HAS_DCK)) { |
533 | status = acpi_remove_notify_handler(func->handle, | |
42f49a6a RS |
534 | ACPI_SYSTEM_NOTIFY, |
535 | handle_hotplug_event_func); | |
20416ea5 KA |
536 | if (ACPI_FAILURE(status)) |
537 | err("failed to remove notify handler\n"); | |
538 | } | |
58c08628 | 539 | list_del(&func->sibling); |
42f49a6a RS |
540 | kfree(func); |
541 | } | |
e27da381 MT |
542 | acpiphp_unregister_hotplug_slot(slot); |
543 | list_del(&slot->funcs); | |
42f49a6a RS |
544 | kfree(slot); |
545 | slot = next; | |
546 | } | |
547 | ||
5d4a4b25 AC |
548 | /* |
549 | * Only P2P bridges have a pci_dev | |
550 | */ | |
551 | if (bridge->pci_dev) | |
552 | put_device(&bridge->pci_bus->dev); | |
553 | ||
42f49a6a RS |
554 | pci_dev_put(bridge->pci_dev); |
555 | list_del(&bridge->list); | |
556 | kfree(bridge); | |
1da177e4 LT |
557 | } |
558 | ||
364d5094 RS |
559 | static acpi_status |
560 | cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
561 | { | |
562 | struct acpiphp_bridge *bridge; | |
563 | ||
551bcb75 MT |
564 | /* cleanup p2p bridges under this P2P bridge |
565 | in a depth-first manner */ | |
566 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
2263576c | 567 | cleanup_p2p_bridge, NULL, NULL, NULL); |
551bcb75 | 568 | |
a13307ce AC |
569 | bridge = acpiphp_handle_to_bridge(handle); |
570 | if (bridge) | |
571 | cleanup_bridge(bridge); | |
572 | ||
364d5094 RS |
573 | return AE_OK; |
574 | } | |
575 | ||
576 | static void remove_bridge(acpi_handle handle) | |
577 | { | |
578 | struct acpiphp_bridge *bridge; | |
579 | ||
551bcb75 MT |
580 | /* cleanup p2p bridges under this host bridge |
581 | in a depth-first manner */ | |
582 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
2263576c | 583 | (u32)1, cleanup_p2p_bridge, NULL, NULL, NULL); |
551bcb75 | 584 | |
a13307ce AC |
585 | /* |
586 | * On root bridges with hotplug slots directly underneath (ie, | |
587 | * no p2p bridge inbetween), we call cleanup_bridge(). | |
588 | * | |
589 | * The else clause cleans up root bridges that either had no | |
590 | * hotplug slots at all, or had a p2p bridge underneath. | |
591 | */ | |
364d5094 | 592 | bridge = acpiphp_handle_to_bridge(handle); |
551bcb75 | 593 | if (bridge) |
364d5094 | 594 | cleanup_bridge(bridge); |
a13307ce AC |
595 | else |
596 | acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
597 | handle_hotplug_event_bridge); | |
364d5094 | 598 | } |
1da177e4 LT |
599 | |
600 | static int power_on_slot(struct acpiphp_slot *slot) | |
601 | { | |
602 | acpi_status status; | |
603 | struct acpiphp_func *func; | |
1da177e4 LT |
604 | int retval = 0; |
605 | ||
606 | /* if already enabled, just skip */ | |
607 | if (slot->flags & SLOT_POWEREDON) | |
608 | goto err_exit; | |
609 | ||
58c08628 | 610 | list_for_each_entry(func, &slot->funcs, sibling) { |
1da177e4 | 611 | if (func->flags & FUNC_HAS_PS0) { |
66bef8c0 | 612 | dbg("%s: executing _PS0\n", __func__); |
1da177e4 LT |
613 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); |
614 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 615 | warn("%s: _PS0 failed\n", __func__); |
1da177e4 LT |
616 | retval = -1; |
617 | goto err_exit; | |
618 | } else | |
619 | break; | |
620 | } | |
621 | } | |
622 | ||
623 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
624 | ||
625 | slot->flags |= SLOT_POWEREDON; | |
626 | ||
627 | err_exit: | |
628 | return retval; | |
629 | } | |
630 | ||
631 | ||
632 | static int power_off_slot(struct acpiphp_slot *slot) | |
633 | { | |
634 | acpi_status status; | |
635 | struct acpiphp_func *func; | |
1da177e4 LT |
636 | |
637 | int retval = 0; | |
638 | ||
639 | /* if already disabled, just skip */ | |
640 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
641 | goto err_exit; | |
642 | ||
58c08628 | 643 | list_for_each_entry(func, &slot->funcs, sibling) { |
2f523b15 | 644 | if (func->flags & FUNC_HAS_PS3) { |
1da177e4 LT |
645 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); |
646 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 647 | warn("%s: _PS3 failed\n", __func__); |
1da177e4 LT |
648 | retval = -1; |
649 | goto err_exit; | |
650 | } else | |
651 | break; | |
652 | } | |
653 | } | |
654 | ||
1da177e4 LT |
655 | /* TBD: evaluate _STA to check if the slot is disabled */ |
656 | ||
657 | slot->flags &= (~SLOT_POWEREDON); | |
658 | ||
659 | err_exit: | |
660 | return retval; | |
661 | } | |
662 | ||
663 | ||
15a1ae74 KA |
664 | |
665 | /** | |
26e6c66e | 666 | * acpiphp_max_busnr - return the highest reserved bus number under the given bus. |
15a1ae74 | 667 | * @bus: bus to start search with |
15a1ae74 KA |
668 | */ |
669 | static unsigned char acpiphp_max_busnr(struct pci_bus *bus) | |
670 | { | |
671 | struct list_head *tmp; | |
672 | unsigned char max, n; | |
673 | ||
674 | /* | |
675 | * pci_bus_max_busnr will return the highest | |
676 | * reserved busnr for all these children. | |
677 | * that is equivalent to the bus->subordinate | |
678 | * value. We don't want to use the parent's | |
679 | * bus->subordinate value because it could have | |
680 | * padding in it. | |
681 | */ | |
682 | max = bus->secondary; | |
683 | ||
684 | list_for_each(tmp, &bus->children) { | |
685 | n = pci_bus_max_busnr(pci_bus_b(tmp)); | |
686 | if (n > max) | |
687 | max = n; | |
688 | } | |
689 | return max; | |
690 | } | |
691 | ||
692 | ||
15a1ae74 KA |
693 | /** |
694 | * acpiphp_bus_add - add a new bus to acpi subsystem | |
695 | * @func: acpiphp_func of the bridge | |
15a1ae74 KA |
696 | */ |
697 | static int acpiphp_bus_add(struct acpiphp_func *func) | |
698 | { | |
699 | acpi_handle phandle; | |
700 | struct acpi_device *device, *pdevice; | |
701 | int ret_val; | |
702 | ||
703 | acpi_get_parent(func->handle, &phandle); | |
704 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
705 | dbg("no parent device, assuming NULL\n"); | |
706 | pdevice = NULL; | |
707 | } | |
20416ea5 KA |
708 | if (!acpi_bus_get_device(func->handle, &device)) { |
709 | dbg("bus exists... trim\n"); | |
710 | /* this shouldn't be in here, so remove | |
711 | * the bus then re-add it... | |
712 | */ | |
713 | ret_val = acpi_bus_trim(device, 1); | |
714 | dbg("acpi_bus_trim return %x\n", ret_val); | |
715 | } | |
716 | ||
717 | ret_val = acpi_bus_add(&device, pdevice, func->handle, | |
718 | ACPI_BUS_TYPE_DEVICE); | |
719 | if (ret_val) { | |
720 | dbg("error adding bus, %x\n", | |
721 | -ret_val); | |
722 | goto acpiphp_bus_add_out; | |
15a1ae74 | 723 | } |
15a1ae74 KA |
724 | ret_val = acpi_bus_start(device); |
725 | ||
726 | acpiphp_bus_add_out: | |
727 | return ret_val; | |
728 | } | |
729 | ||
730 | ||
92c9be95 MT |
731 | /** |
732 | * acpiphp_bus_trim - trim a bus from acpi subsystem | |
733 | * @handle: handle to acpi namespace | |
92c9be95 | 734 | */ |
6d47a5e4 | 735 | static int acpiphp_bus_trim(acpi_handle handle) |
92c9be95 MT |
736 | { |
737 | struct acpi_device *device; | |
738 | int retval; | |
739 | ||
740 | retval = acpi_bus_get_device(handle, &device); | |
741 | if (retval) { | |
742 | dbg("acpi_device not found\n"); | |
743 | return retval; | |
744 | } | |
745 | ||
746 | retval = acpi_bus_trim(device, 1); | |
747 | if (retval) | |
748 | err("cannot remove from acpi list\n"); | |
749 | ||
750 | return retval; | |
751 | } | |
15a1ae74 | 752 | |
d0607050 SL |
753 | static void acpiphp_set_acpi_region(struct acpiphp_slot *slot) |
754 | { | |
755 | struct acpiphp_func *func; | |
756 | union acpi_object params[2]; | |
757 | struct acpi_object_list arg_list; | |
758 | ||
759 | list_for_each_entry(func, &slot->funcs, sibling) { | |
760 | arg_list.count = 2; | |
761 | arg_list.pointer = params; | |
762 | params[0].type = ACPI_TYPE_INTEGER; | |
763 | params[0].integer.value = ACPI_ADR_SPACE_PCI_CONFIG; | |
764 | params[1].type = ACPI_TYPE_INTEGER; | |
765 | params[1].integer.value = 1; | |
766 | /* _REG is optional, we don't care about if there is failure */ | |
767 | acpi_evaluate_object(func->handle, "_REG", &arg_list, NULL); | |
768 | } | |
769 | } | |
770 | ||
1da177e4 LT |
771 | /** |
772 | * enable_device - enable, configure a slot | |
773 | * @slot: slot to be enabled | |
774 | * | |
775 | * This function should be called per *physical slot*, | |
776 | * not per each slot object in ACPI namespace. | |
1da177e4 | 777 | */ |
0ab2b57f | 778 | static int __ref enable_device(struct acpiphp_slot *slot) |
1da177e4 | 779 | { |
1da177e4 | 780 | struct pci_dev *dev; |
42f49a6a | 781 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 LT |
782 | struct acpiphp_func *func; |
783 | int retval = 0; | |
42f49a6a | 784 | int num, max, pass; |
551bcb75 | 785 | acpi_status status; |
1da177e4 LT |
786 | |
787 | if (slot->flags & SLOT_ENABLED) | |
788 | goto err_exit; | |
789 | ||
790 | /* sanity check: dev should be NULL when hot-plugged in */ | |
42f49a6a | 791 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); |
1da177e4 LT |
792 | if (dev) { |
793 | /* This case shouldn't happen */ | |
794 | err("pci_dev structure already exists.\n"); | |
42f49a6a | 795 | pci_dev_put(dev); |
1da177e4 LT |
796 | retval = -1; |
797 | goto err_exit; | |
798 | } | |
799 | ||
42f49a6a RS |
800 | num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0)); |
801 | if (num == 0) { | |
1da177e4 LT |
802 | err("No new device found\n"); |
803 | retval = -1; | |
804 | goto err_exit; | |
805 | } | |
806 | ||
15a1ae74 | 807 | max = acpiphp_max_busnr(bus); |
42f49a6a RS |
808 | for (pass = 0; pass < 2; pass++) { |
809 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
810 | if (PCI_SLOT(dev->devfn) != slot->device) | |
811 | continue; | |
812 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
c64b5eea | 813 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
42f49a6a | 814 | max = pci_scan_bridge(bus, dev, max, pass); |
92c9be95 | 815 | if (pass && dev->subordinate) |
c64b5eea KA |
816 | pci_bus_size_bridges(dev->subordinate); |
817 | } | |
42f49a6a | 818 | } |
1da177e4 LT |
819 | } |
820 | ||
58c08628 | 821 | list_for_each_entry(func, &slot->funcs, sibling) |
92c9be95 | 822 | acpiphp_bus_add(func); |
92c9be95 | 823 | |
42f49a6a | 824 | pci_bus_assign_resources(bus); |
8e5dce35 | 825 | acpiphp_sanitize_bus(bus); |
fca6825a | 826 | acpiphp_set_hpp_values(bus); |
d0607050 | 827 | acpiphp_set_acpi_region(slot); |
8e5dce35 | 828 | pci_enable_bridges(bus); |
42f49a6a RS |
829 | pci_bus_add_devices(bus); |
830 | ||
58c08628 | 831 | list_for_each_entry(func, &slot->funcs, sibling) { |
9d911d79 AC |
832 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
833 | func->function)); | |
834 | if (!dev) | |
551bcb75 MT |
835 | continue; |
836 | ||
9d911d79 AC |
837 | if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE && |
838 | dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) { | |
839 | pci_dev_put(dev); | |
551bcb75 | 840 | continue; |
9d911d79 | 841 | } |
551bcb75 MT |
842 | |
843 | status = find_p2p_bridge(func->handle, (u32)1, bus, NULL); | |
844 | if (ACPI_FAILURE(status)) | |
845 | warn("find_p2p_bridge failed (error code = 0x%x)\n", | |
846 | status); | |
9d911d79 | 847 | pci_dev_put(dev); |
1da177e4 LT |
848 | } |
849 | ||
850 | slot->flags |= SLOT_ENABLED; | |
851 | ||
1da177e4 LT |
852 | err_exit: |
853 | return retval; | |
854 | } | |
855 | ||
d5cdb672 ST |
856 | static void disable_bridges(struct pci_bus *bus) |
857 | { | |
858 | struct pci_dev *dev; | |
859 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
860 | if (dev->subordinate) { | |
861 | disable_bridges(dev->subordinate); | |
862 | pci_disable_device(dev); | |
863 | } | |
864 | } | |
865 | } | |
1da177e4 LT |
866 | |
867 | /** | |
868 | * disable_device - disable a slot | |
26e6c66e | 869 | * @slot: ACPI PHP slot |
1da177e4 LT |
870 | */ |
871 | static int disable_device(struct acpiphp_slot *slot) | |
872 | { | |
1da177e4 | 873 | struct acpiphp_func *func; |
9d911d79 | 874 | struct pci_dev *pdev; |
1da177e4 LT |
875 | |
876 | /* is this slot already disabled? */ | |
877 | if (!(slot->flags & SLOT_ENABLED)) | |
878 | goto err_exit; | |
879 | ||
9d911d79 | 880 | list_for_each_entry(func, &slot->funcs, sibling) { |
551bcb75 MT |
881 | if (func->bridge) { |
882 | /* cleanup p2p bridges under this P2P bridge */ | |
883 | cleanup_p2p_bridge(func->bridge->handle, | |
884 | (u32)1, NULL, NULL); | |
885 | func->bridge = NULL; | |
886 | } | |
887 | ||
9d911d79 AC |
888 | pdev = pci_get_slot(slot->bridge->pci_bus, |
889 | PCI_DEVFN(slot->device, func->function)); | |
890 | if (pdev) { | |
891 | pci_stop_bus_device(pdev); | |
892 | if (pdev->subordinate) { | |
893 | disable_bridges(pdev->subordinate); | |
894 | pci_disable_device(pdev); | |
d5cdb672 | 895 | } |
9d911d79 AC |
896 | pci_remove_bus_device(pdev); |
897 | pci_dev_put(pdev); | |
d5cdb672 | 898 | } |
600812ec ST |
899 | } |
900 | ||
9d911d79 | 901 | list_for_each_entry(func, &slot->funcs, sibling) { |
92c9be95 | 902 | acpiphp_bus_trim(func->handle); |
1da177e4 LT |
903 | } |
904 | ||
905 | slot->flags &= (~SLOT_ENABLED); | |
906 | ||
9d911d79 AC |
907 | err_exit: |
908 | return 0; | |
1da177e4 LT |
909 | } |
910 | ||
911 | ||
912 | /** | |
913 | * get_slot_status - get ACPI slot status | |
26e6c66e | 914 | * @slot: ACPI PHP slot |
1da177e4 | 915 | * |
26e6c66e RD |
916 | * If a slot has _STA for each function and if any one of them |
917 | * returned non-zero status, return it. | |
1da177e4 | 918 | * |
26e6c66e RD |
919 | * If a slot doesn't have _STA and if any one of its functions' |
920 | * configuration space is configured, return 0x0f as a _STA. | |
1da177e4 | 921 | * |
26e6c66e | 922 | * Otherwise return 0. |
1da177e4 LT |
923 | */ |
924 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
925 | { | |
926 | acpi_status status; | |
27663c58 | 927 | unsigned long long sta = 0; |
1da177e4 | 928 | u32 dvid; |
1da177e4 LT |
929 | struct acpiphp_func *func; |
930 | ||
58c08628 | 931 | list_for_each_entry(func, &slot->funcs, sibling) { |
1da177e4 LT |
932 | if (func->flags & FUNC_HAS_STA) { |
933 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
934 | if (ACPI_SUCCESS(status) && sta) | |
935 | break; | |
936 | } else { | |
937 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
938 | PCI_DEVFN(slot->device, | |
939 | func->function), | |
940 | PCI_VENDOR_ID, &dvid); | |
941 | if (dvid != 0xffffffff) { | |
942 | sta = ACPI_STA_ALL; | |
943 | break; | |
944 | } | |
945 | } | |
946 | } | |
947 | ||
948 | return (unsigned int)sta; | |
949 | } | |
950 | ||
8d50e332 RS |
951 | /** |
952 | * acpiphp_eject_slot - physically eject the slot | |
26e6c66e | 953 | * @slot: ACPI PHP slot |
8d50e332 | 954 | */ |
bfceafc5 | 955 | int acpiphp_eject_slot(struct acpiphp_slot *slot) |
8d50e332 RS |
956 | { |
957 | acpi_status status; | |
958 | struct acpiphp_func *func; | |
8d50e332 RS |
959 | struct acpi_object_list arg_list; |
960 | union acpi_object arg; | |
961 | ||
58c08628 | 962 | list_for_each_entry(func, &slot->funcs, sibling) { |
8d50e332 RS |
963 | /* We don't want to call _EJ0 on non-existing functions. */ |
964 | if ((func->flags & FUNC_HAS_EJ0)) { | |
965 | /* _EJ0 method take one argument */ | |
966 | arg_list.count = 1; | |
967 | arg_list.pointer = &arg; | |
968 | arg.type = ACPI_TYPE_INTEGER; | |
969 | arg.integer.value = 1; | |
970 | ||
971 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
972 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 973 | warn("%s: _EJ0 failed\n", __func__); |
8d50e332 RS |
974 | return -1; |
975 | } else | |
976 | break; | |
977 | } | |
978 | } | |
979 | return 0; | |
980 | } | |
981 | ||
1da177e4 LT |
982 | /** |
983 | * acpiphp_check_bridge - re-enumerate devices | |
26e6c66e | 984 | * @bridge: where to begin re-enumeration |
1da177e4 LT |
985 | * |
986 | * Iterate over all slots under this bridge and make sure that if a | |
987 | * card is present they are enabled, and if not they are disabled. | |
988 | */ | |
989 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
990 | { | |
991 | struct acpiphp_slot *slot; | |
992 | int retval = 0; | |
993 | int enabled, disabled; | |
994 | ||
995 | enabled = disabled = 0; | |
996 | ||
997 | for (slot = bridge->slots; slot; slot = slot->next) { | |
998 | unsigned int status = get_slot_status(slot); | |
999 | if (slot->flags & SLOT_ENABLED) { | |
1000 | if (status == ACPI_STA_ALL) | |
1001 | continue; | |
1002 | retval = acpiphp_disable_slot(slot); | |
1003 | if (retval) { | |
1004 | err("Error occurred in disabling\n"); | |
1005 | goto err_exit; | |
8d50e332 RS |
1006 | } else { |
1007 | acpiphp_eject_slot(slot); | |
1da177e4 LT |
1008 | } |
1009 | disabled++; | |
1010 | } else { | |
1011 | if (status != ACPI_STA_ALL) | |
1012 | continue; | |
1013 | retval = acpiphp_enable_slot(slot); | |
1014 | if (retval) { | |
1015 | err("Error occurred in enabling\n"); | |
1016 | goto err_exit; | |
1017 | } | |
1018 | enabled++; | |
1019 | } | |
1020 | } | |
1021 | ||
66bef8c0 | 1022 | dbg("%s: %d enabled, %d disabled\n", __func__, enabled, disabled); |
1da177e4 LT |
1023 | |
1024 | err_exit: | |
1025 | return retval; | |
1026 | } | |
1027 | ||
fca6825a | 1028 | static void acpiphp_set_hpp_values(struct pci_bus *bus) |
8e7561cf | 1029 | { |
8e7561cf RS |
1030 | struct pci_dev *dev; |
1031 | ||
e81995bb BH |
1032 | list_for_each_entry(dev, &bus->devices, bus_list) |
1033 | pci_configure_slot(dev); | |
8e7561cf RS |
1034 | } |
1035 | ||
1036 | /* | |
1037 | * Remove devices for which we could not assign resources, call | |
1038 | * arch specific code to fix-up the bus | |
1039 | */ | |
1040 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
1041 | { | |
1042 | struct pci_dev *dev; | |
1043 | int i; | |
1044 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
1045 | ||
1046 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1047 | for (i=0; i<PCI_BRIDGE_RESOURCES; i++) { | |
1048 | struct resource *res = &dev->resource[i]; | |
1049 | if ((res->flags & type_mask) && !res->start && | |
1050 | res->end) { | |
1051 | /* Could not assign a required resources | |
1052 | * for this device, remove it */ | |
1053 | pci_remove_bus_device(dev); | |
1054 | break; | |
1055 | } | |
1056 | } | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | /* Program resources in newly inserted bridge */ | |
1061 | static int acpiphp_configure_bridge (acpi_handle handle) | |
1062 | { | |
7f538669 AC |
1063 | struct pci_bus *bus; |
1064 | ||
1065 | if (acpi_is_root_bridge(handle)) { | |
1066 | struct acpi_pci_root *root = acpi_pci_find_root(handle); | |
1067 | bus = root->bus; | |
1068 | } else { | |
1069 | struct pci_dev *pdev = acpi_get_pci_dev(handle); | |
1070 | bus = pdev->subordinate; | |
1071 | pci_dev_put(pdev); | |
1072 | } | |
8e7561cf RS |
1073 | |
1074 | pci_bus_size_bridges(bus); | |
1075 | pci_bus_assign_resources(bus); | |
1076 | acpiphp_sanitize_bus(bus); | |
fca6825a | 1077 | acpiphp_set_hpp_values(bus); |
8e7561cf RS |
1078 | pci_enable_bridges(bus); |
1079 | return 0; | |
1080 | } | |
1081 | ||
1082 | static void handle_bridge_insertion(acpi_handle handle, u32 type) | |
1083 | { | |
1084 | struct acpi_device *device, *pdevice; | |
1085 | acpi_handle phandle; | |
1086 | ||
1087 | if ((type != ACPI_NOTIFY_BUS_CHECK) && | |
1088 | (type != ACPI_NOTIFY_DEVICE_CHECK)) { | |
1089 | err("unexpected notification type %d\n", type); | |
1090 | return; | |
1091 | } | |
1092 | ||
1093 | acpi_get_parent(handle, &phandle); | |
1094 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1095 | dbg("no parent device, assuming NULL\n"); | |
1096 | pdevice = NULL; | |
1097 | } | |
1098 | if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) { | |
1099 | err("cannot add bridge to acpi list\n"); | |
1100 | return; | |
1101 | } | |
1102 | if (!acpiphp_configure_bridge(handle) && | |
1103 | !acpi_bus_start(device)) | |
1104 | add_bridge(handle); | |
1105 | else | |
1106 | err("cannot configure and start bridge\n"); | |
1107 | ||
1108 | } | |
1109 | ||
1da177e4 LT |
1110 | /* |
1111 | * ACPI event handlers | |
1112 | */ | |
1113 | ||
0bbd6424 GH |
1114 | static acpi_status |
1115 | count_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1116 | { | |
1117 | int *count = (int *)context; | |
1118 | struct acpiphp_bridge *bridge; | |
1119 | ||
1120 | bridge = acpiphp_handle_to_bridge(handle); | |
1121 | if (bridge) | |
1122 | (*count)++; | |
1123 | return AE_OK ; | |
1124 | } | |
1125 | ||
1126 | static acpi_status | |
1127 | check_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1128 | { | |
1129 | struct acpiphp_bridge *bridge; | |
1130 | char objname[64]; | |
1131 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1132 | .pointer = objname }; | |
1133 | ||
1134 | bridge = acpiphp_handle_to_bridge(handle); | |
1135 | if (bridge) { | |
1136 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1137 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1138 | __func__, objname); |
0bbd6424 GH |
1139 | acpiphp_check_bridge(bridge); |
1140 | } | |
1141 | return AE_OK ; | |
1142 | } | |
1143 | ||
1da177e4 LT |
1144 | /** |
1145 | * handle_hotplug_event_bridge - handle ACPI event on bridges | |
1da177e4 LT |
1146 | * @handle: Notify()'ed acpi_handle |
1147 | * @type: Notify code | |
1148 | * @context: pointer to acpiphp_bridge structure | |
1149 | * | |
26e6c66e | 1150 | * Handles ACPI event notification on {host,p2p} bridges. |
1da177e4 LT |
1151 | */ |
1152 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) | |
1153 | { | |
1154 | struct acpiphp_bridge *bridge; | |
1155 | char objname[64]; | |
1156 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1157 | .pointer = objname }; | |
8e7561cf | 1158 | struct acpi_device *device; |
0bbd6424 | 1159 | int num_sub_bridges = 0; |
1da177e4 | 1160 | |
8e7561cf RS |
1161 | if (acpi_bus_get_device(handle, &device)) { |
1162 | /* This bridge must have just been physically inserted */ | |
1163 | handle_bridge_insertion(handle, type); | |
1164 | return; | |
1165 | } | |
1166 | ||
1167 | bridge = acpiphp_handle_to_bridge(handle); | |
0bbd6424 GH |
1168 | if (type == ACPI_NOTIFY_BUS_CHECK) { |
1169 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, ACPI_UINT32_MAX, | |
2263576c | 1170 | count_sub_bridges, NULL, &num_sub_bridges, NULL); |
0bbd6424 GH |
1171 | } |
1172 | ||
1173 | if (!bridge && !num_sub_bridges) { | |
8e7561cf RS |
1174 | err("cannot get bridge info\n"); |
1175 | return; | |
1176 | } | |
1da177e4 LT |
1177 | |
1178 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1179 | ||
1180 | switch (type) { | |
1181 | case ACPI_NOTIFY_BUS_CHECK: | |
1182 | /* bus re-enumerate */ | |
66bef8c0 | 1183 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
0bbd6424 GH |
1184 | if (bridge) { |
1185 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1186 | __func__, objname); |
0bbd6424 GH |
1187 | acpiphp_check_bridge(bridge); |
1188 | } | |
1189 | if (num_sub_bridges) | |
1190 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
2263576c | 1191 | ACPI_UINT32_MAX, check_sub_bridges, NULL, NULL, NULL); |
1da177e4 LT |
1192 | break; |
1193 | ||
1194 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1195 | /* device check */ | |
66bef8c0 | 1196 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1197 | acpiphp_check_bridge(bridge); |
1198 | break; | |
1199 | ||
1200 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1201 | /* wake event */ | |
66bef8c0 | 1202 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1203 | break; |
1204 | ||
1205 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1206 | /* request device eject */ | |
66bef8c0 | 1207 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
551bcb75 MT |
1208 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
1209 | (bridge->flags & BRIDGE_HAS_EJ0)) { | |
1210 | struct acpiphp_slot *slot; | |
1211 | slot = bridge->func->slot; | |
1212 | if (!acpiphp_disable_slot(slot)) | |
1213 | acpiphp_eject_slot(slot); | |
1214 | } | |
1da177e4 LT |
1215 | break; |
1216 | ||
1217 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1218 | printk(KERN_ERR "Device %s cannot be configured due" | |
1219 | " to a frequency mismatch\n", objname); | |
1220 | break; | |
1221 | ||
1222 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1223 | printk(KERN_ERR "Device %s cannot be configured due" | |
1224 | " to a bus mode mismatch\n", objname); | |
1225 | break; | |
1226 | ||
1227 | case ACPI_NOTIFY_POWER_FAULT: | |
1228 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1229 | objname); | |
1230 | break; | |
1231 | ||
1232 | default: | |
1233 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1234 | break; | |
1235 | } | |
1236 | } | |
1237 | ||
1da177e4 LT |
1238 | /** |
1239 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1da177e4 LT |
1240 | * @handle: Notify()'ed acpi_handle |
1241 | * @type: Notify code | |
1242 | * @context: pointer to acpiphp_func structure | |
1243 | * | |
26e6c66e | 1244 | * Handles ACPI event notification on slots. |
1da177e4 | 1245 | */ |
2b85e130 | 1246 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) |
1da177e4 LT |
1247 | { |
1248 | struct acpiphp_func *func; | |
1249 | char objname[64]; | |
1250 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1251 | .pointer = objname }; | |
1252 | ||
1253 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1254 | ||
1255 | func = (struct acpiphp_func *)context; | |
1256 | ||
1257 | switch (type) { | |
1258 | case ACPI_NOTIFY_BUS_CHECK: | |
1259 | /* bus re-enumerate */ | |
66bef8c0 | 1260 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
1da177e4 LT |
1261 | acpiphp_enable_slot(func->slot); |
1262 | break; | |
1263 | ||
1264 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1265 | /* device check : re-enumerate from parent bus */ | |
66bef8c0 | 1266 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1267 | acpiphp_check_bridge(func->slot->bridge); |
1268 | break; | |
1269 | ||
1270 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1271 | /* wake event */ | |
66bef8c0 | 1272 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1273 | break; |
1274 | ||
1275 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1276 | /* request device eject */ | |
66bef8c0 | 1277 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
8d50e332 RS |
1278 | if (!(acpiphp_disable_slot(func->slot))) |
1279 | acpiphp_eject_slot(func->slot); | |
1da177e4 LT |
1280 | break; |
1281 | ||
1282 | default: | |
1283 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1284 | break; | |
1285 | } | |
1286 | } | |
1287 | ||
8e7561cf RS |
1288 | |
1289 | static acpi_status | |
1290 | find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1291 | { | |
1292 | int *count = (int *)context; | |
1293 | ||
27558203 | 1294 | if (acpi_is_root_bridge(handle)) { |
8e7561cf RS |
1295 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1296 | handle_hotplug_event_bridge, NULL); | |
1297 | (*count)++; | |
1298 | } | |
1299 | return AE_OK ; | |
1300 | } | |
1da177e4 LT |
1301 | |
1302 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1303 | .add = add_bridge, | |
1304 | .remove = remove_bridge, | |
1305 | }; | |
1306 | ||
1307 | /** | |
1308 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1da177e4 LT |
1309 | */ |
1310 | int __init acpiphp_glue_init(void) | |
1311 | { | |
8e7561cf | 1312 | int num = 0; |
1da177e4 | 1313 | |
8e7561cf | 1314 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
2263576c | 1315 | ACPI_UINT32_MAX, find_root_bridges, NULL, &num, NULL); |
1da177e4 LT |
1316 | |
1317 | if (num <= 0) | |
1318 | return -1; | |
8e7561cf RS |
1319 | else |
1320 | acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1da177e4 LT |
1321 | |
1322 | return 0; | |
1323 | } | |
1324 | ||
1325 | ||
1326 | /** | |
1327 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1328 | * | |
26e6c66e | 1329 | * This function frees all data allocated in acpiphp_glue_init(). |
1da177e4 | 1330 | */ |
031f30d2 | 1331 | void acpiphp_glue_exit(void) |
1da177e4 | 1332 | { |
1da177e4 LT |
1333 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); |
1334 | } | |
1335 | ||
1336 | ||
1337 | /** | |
1338 | * acpiphp_get_num_slots - count number of slots in a system | |
1339 | */ | |
1340 | int __init acpiphp_get_num_slots(void) | |
1341 | { | |
1da177e4 | 1342 | struct acpiphp_bridge *bridge; |
467c442f | 1343 | int num_slots = 0; |
1da177e4 | 1344 | |
58c08628 | 1345 | list_for_each_entry(bridge, &bridge_list, list) { |
42f49a6a RS |
1346 | dbg("Bus %04x:%02x has %d slot%s\n", |
1347 | pci_domain_nr(bridge->pci_bus), | |
1348 | bridge->pci_bus->number, bridge->nr_slots, | |
1349 | bridge->nr_slots == 1 ? "" : "s"); | |
1da177e4 LT |
1350 | num_slots += bridge->nr_slots; |
1351 | } | |
1352 | ||
42f49a6a | 1353 | dbg("Total %d slots\n", num_slots); |
1da177e4 LT |
1354 | return num_slots; |
1355 | } | |
1356 | ||
1357 | ||
1358 | #if 0 | |
1359 | /** | |
1360 | * acpiphp_for_each_slot - call function for each slot | |
1361 | * @fn: callback function | |
1362 | * @data: context to be passed to callback function | |
1da177e4 LT |
1363 | */ |
1364 | static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) | |
1365 | { | |
1366 | struct list_head *node; | |
1367 | struct acpiphp_bridge *bridge; | |
1368 | struct acpiphp_slot *slot; | |
1369 | int retval = 0; | |
1370 | ||
1371 | list_for_each (node, &bridge_list) { | |
1372 | bridge = (struct acpiphp_bridge *)node; | |
1373 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1374 | retval = fn(slot, data); | |
1375 | if (!retval) | |
1376 | goto err_exit; | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | err_exit: | |
1381 | return retval; | |
1382 | } | |
1383 | #endif | |
1384 | ||
1da177e4 LT |
1385 | |
1386 | /** | |
1387 | * acpiphp_enable_slot - power on slot | |
26e6c66e | 1388 | * @slot: ACPI PHP slot |
1da177e4 LT |
1389 | */ |
1390 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1391 | { | |
1392 | int retval; | |
1393 | ||
6aa4cdd0 | 1394 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1395 | |
1396 | /* wake up all functions */ | |
1397 | retval = power_on_slot(slot); | |
1398 | if (retval) | |
1399 | goto err_exit; | |
1400 | ||
cde0e5d7 | 1401 | if (get_slot_status(slot) == ACPI_STA_ALL) { |
1da177e4 LT |
1402 | /* configure all functions */ |
1403 | retval = enable_device(slot); | |
cde0e5d7 MT |
1404 | if (retval) |
1405 | power_off_slot(slot); | |
1406 | } else { | |
66bef8c0 | 1407 | dbg("%s: Slot status is not ACPI_STA_ALL\n", __func__); |
cde0e5d7 MT |
1408 | power_off_slot(slot); |
1409 | } | |
1da177e4 LT |
1410 | |
1411 | err_exit: | |
6aa4cdd0 | 1412 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1413 | return retval; |
1414 | } | |
1415 | ||
1da177e4 LT |
1416 | /** |
1417 | * acpiphp_disable_slot - power off slot | |
26e6c66e | 1418 | * @slot: ACPI PHP slot |
1da177e4 LT |
1419 | */ |
1420 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1421 | { | |
1422 | int retval = 0; | |
1423 | ||
6aa4cdd0 | 1424 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1425 | |
1426 | /* unconfigure all functions */ | |
1427 | retval = disable_device(slot); | |
1428 | if (retval) | |
1429 | goto err_exit; | |
1430 | ||
1431 | /* power off all functions */ | |
1432 | retval = power_off_slot(slot); | |
1433 | if (retval) | |
1434 | goto err_exit; | |
1435 | ||
1da177e4 | 1436 | err_exit: |
6aa4cdd0 | 1437 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1438 | return retval; |
1439 | } | |
1440 | ||
1441 | ||
1442 | /* | |
1443 | * slot enabled: 1 | |
1444 | * slot disabled: 0 | |
1445 | */ | |
1446 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1447 | { | |
8d50e332 | 1448 | return (slot->flags & SLOT_POWEREDON); |
1da177e4 LT |
1449 | } |
1450 | ||
1451 | ||
1452 | /* | |
35ae61a0 MT |
1453 | * latch open: 1 |
1454 | * latch closed: 0 | |
1da177e4 LT |
1455 | */ |
1456 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1457 | { | |
1458 | unsigned int sta; | |
1459 | ||
1460 | sta = get_slot_status(slot); | |
1461 | ||
35ae61a0 | 1462 | return (sta & ACPI_STA_SHOW_IN_UI) ? 0 : 1; |
1da177e4 LT |
1463 | } |
1464 | ||
1465 | ||
1466 | /* | |
1467 | * adapter presence : 1 | |
1468 | * absence : 0 | |
1469 | */ | |
1470 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1471 | { | |
1472 | unsigned int sta; | |
1473 | ||
1474 | sta = get_slot_status(slot); | |
1475 | ||
1476 | return (sta == 0) ? 0 : 1; | |
1477 | } |