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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 | * | |
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> |
1da177e4 LT |
50 | |
51 | #include "../pci.h" | |
1da177e4 LT |
52 | #include "acpiphp.h" |
53 | ||
54 | static LIST_HEAD(bridge_list); | |
600812ec ST |
55 | static LIST_HEAD(ioapic_list); |
56 | static DEFINE_SPINLOCK(ioapic_list_lock); | |
1da177e4 LT |
57 | |
58 | #define MY_NAME "acpiphp_glue" | |
59 | ||
60 | static void handle_hotplug_event_bridge (acpi_handle, u32, void *); | |
8e5dce35 KA |
61 | static void acpiphp_sanitize_bus(struct pci_bus *bus); |
62 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus); | |
2b85e130 | 63 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context); |
8e5dce35 | 64 | |
5a340ed8 | 65 | /* callback routine to check for the existence of a pci dock device */ |
4e8662bb KA |
66 | static acpi_status |
67 | is_pci_dock_device(acpi_handle handle, u32 lvl, void *context, void **rv) | |
68 | { | |
69 | int *count = (int *)context; | |
70 | ||
71 | if (is_dock_device(handle)) { | |
72 | (*count)++; | |
73 | return AE_CTRL_TERMINATE; | |
74 | } else { | |
75 | return AE_OK; | |
76 | } | |
77 | } | |
78 | ||
4e8662bb KA |
79 | /* |
80 | * the _DCK method can do funny things... and sometimes not | |
81 | * hah-hah funny. | |
82 | * | |
83 | * TBD - figure out a way to only call fixups for | |
84 | * systems that require them. | |
85 | */ | |
86 | static int post_dock_fixups(struct notifier_block *nb, unsigned long val, | |
87 | void *v) | |
88 | { | |
89 | struct acpiphp_func *func = container_of(nb, struct acpiphp_func, nb); | |
90 | struct pci_bus *bus = func->slot->bridge->pci_bus; | |
91 | u32 buses; | |
92 | ||
93 | if (!bus->self) | |
94 | return NOTIFY_OK; | |
95 | ||
96 | /* fixup bad _DCK function that rewrites | |
97 | * secondary bridge on slot | |
98 | */ | |
99 | pci_read_config_dword(bus->self, | |
100 | PCI_PRIMARY_BUS, | |
101 | &buses); | |
102 | ||
103 | if (((buses >> 8) & 0xff) != bus->secondary) { | |
104 | buses = (buses & 0xff000000) | |
2a9d3521 AC |
105 | | ((unsigned int)(bus->primary) << 0) |
106 | | ((unsigned int)(bus->secondary) << 8) | |
107 | | ((unsigned int)(bus->subordinate) << 16); | |
4e8662bb KA |
108 | pci_write_config_dword(bus->self, PCI_PRIMARY_BUS, buses); |
109 | } | |
110 | return NOTIFY_OK; | |
111 | } | |
112 | ||
113 | ||
1253f7aa SL |
114 | static struct acpi_dock_ops acpiphp_dock_ops = { |
115 | .handler = handle_hotplug_event_func, | |
116 | }; | |
1da177e4 LT |
117 | |
118 | /* callback routine to register each ACPI PCI slot object */ | |
119 | static acpi_status | |
120 | register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) | |
121 | { | |
122 | struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; | |
123 | struct acpiphp_slot *slot; | |
124 | struct acpiphp_func *newfunc; | |
125 | acpi_handle tmp; | |
126 | acpi_status status = AE_OK; | |
27663c58 | 127 | unsigned long long adr, sun; |
e27da381 | 128 | int device, function, retval; |
e8c331e9 | 129 | struct pci_bus *pbus = bridge->pci_bus; |
9d911d79 | 130 | struct pci_dev *pdev; |
1da177e4 | 131 | |
e8c331e9 | 132 | if (!acpi_pci_check_ejectable(pbus, handle) && !is_dock_device(handle)) |
1da177e4 LT |
133 | return AE_OK; |
134 | ||
56ee325e | 135 | acpi_evaluate_integer(handle, "_ADR", NULL, &adr); |
1da177e4 LT |
136 | device = (adr >> 16) & 0xffff; |
137 | function = adr & 0xffff; | |
138 | ||
f5afe806 | 139 | newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL); |
1da177e4 LT |
140 | if (!newfunc) |
141 | return AE_NO_MEMORY; | |
1da177e4 LT |
142 | |
143 | INIT_LIST_HEAD(&newfunc->sibling); | |
144 | newfunc->handle = handle; | |
145 | newfunc->function = function; | |
56ee325e MG |
146 | |
147 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp))) | |
20416ea5 | 148 | newfunc->flags = FUNC_HAS_EJ0; |
1da177e4 LT |
149 | |
150 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) | |
151 | newfunc->flags |= FUNC_HAS_STA; | |
152 | ||
153 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS0", &tmp))) | |
154 | newfunc->flags |= FUNC_HAS_PS0; | |
155 | ||
156 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) | |
157 | newfunc->flags |= FUNC_HAS_PS3; | |
158 | ||
4e8662bb | 159 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) |
20416ea5 | 160 | newfunc->flags |= FUNC_HAS_DCK; |
20416ea5 | 161 | |
1da177e4 | 162 | status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); |
95b38b3f KA |
163 | if (ACPI_FAILURE(status)) { |
164 | /* | |
165 | * use the count of the number of slots we've found | |
166 | * for the number of the slot | |
167 | */ | |
168 | sun = bridge->nr_slots+1; | |
169 | } | |
1da177e4 LT |
170 | |
171 | /* search for objects that share the same slot */ | |
172 | for (slot = bridge->slots; slot; slot = slot->next) | |
173 | if (slot->device == device) { | |
174 | if (slot->sun != sun) | |
175 | warn("sibling found, but _SUN doesn't match!\n"); | |
176 | break; | |
177 | } | |
178 | ||
179 | if (!slot) { | |
f5afe806 | 180 | slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); |
1da177e4 LT |
181 | if (!slot) { |
182 | kfree(newfunc); | |
183 | return AE_NO_MEMORY; | |
184 | } | |
185 | ||
1da177e4 | 186 | slot->bridge = bridge; |
1da177e4 LT |
187 | slot->device = device; |
188 | slot->sun = sun; | |
189 | INIT_LIST_HEAD(&slot->funcs); | |
6aa4cdd0 | 190 | mutex_init(&slot->crit_sect); |
1da177e4 LT |
191 | |
192 | slot->next = bridge->slots; | |
193 | bridge->slots = slot; | |
194 | ||
195 | bridge->nr_slots++; | |
196 | ||
b6adc195 | 197 | dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n", |
e8c331e9 | 198 | slot->sun, pci_domain_nr(pbus), pbus->number, device); |
e27da381 MT |
199 | retval = acpiphp_register_hotplug_slot(slot); |
200 | if (retval) { | |
f46753c5 | 201 | if (retval == -EBUSY) |
b6adc195 | 202 | warn("Slot %llu already registered by another " |
f46753c5 AC |
203 | "hotplug driver\n", slot->sun); |
204 | else | |
205 | warn("acpiphp_register_hotplug_slot failed " | |
206 | "(err code = 0x%x)\n", retval); | |
e27da381 MT |
207 | goto err_exit; |
208 | } | |
1da177e4 LT |
209 | } |
210 | ||
211 | newfunc->slot = slot; | |
212 | list_add_tail(&newfunc->sibling, &slot->funcs); | |
213 | ||
9d911d79 AC |
214 | pdev = pci_get_slot(pbus, PCI_DEVFN(device, function)); |
215 | if (pdev) { | |
1da177e4 | 216 | slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); |
9d911d79 | 217 | pci_dev_put(pdev); |
1da177e4 LT |
218 | } |
219 | ||
4e8662bb KA |
220 | if (is_dock_device(handle)) { |
221 | /* we don't want to call this device's _EJ0 | |
222 | * because we want the dock notify handler | |
223 | * to call it after it calls _DCK | |
20416ea5 KA |
224 | */ |
225 | newfunc->flags &= ~FUNC_HAS_EJ0; | |
4e8662bb | 226 | if (register_hotplug_dock_device(handle, |
1253f7aa | 227 | &acpiphp_dock_ops, newfunc)) |
4e8662bb KA |
228 | dbg("failed to register dock device\n"); |
229 | ||
230 | /* we need to be notified when dock events happen | |
231 | * outside of the hotplug operation, since we may | |
232 | * need to do fixups before we can hotplug. | |
233 | */ | |
234 | newfunc->nb.notifier_call = post_dock_fixups; | |
235 | if (register_dock_notifier(&newfunc->nb)) | |
236 | dbg("failed to register a dock notifier"); | |
20416ea5 KA |
237 | } |
238 | ||
1da177e4 | 239 | /* install notify handler */ |
20416ea5 KA |
240 | if (!(newfunc->flags & FUNC_HAS_DCK)) { |
241 | status = acpi_install_notify_handler(handle, | |
1da177e4 LT |
242 | ACPI_SYSTEM_NOTIFY, |
243 | handle_hotplug_event_func, | |
244 | newfunc); | |
245 | ||
20416ea5 KA |
246 | if (ACPI_FAILURE(status)) |
247 | err("failed to register interrupt notify handler\n"); | |
248 | } else | |
249 | status = AE_OK; | |
1da177e4 | 250 | |
20416ea5 | 251 | return status; |
e27da381 MT |
252 | |
253 | err_exit: | |
254 | bridge->nr_slots--; | |
255 | bridge->slots = slot->next; | |
256 | kfree(slot); | |
257 | kfree(newfunc); | |
258 | ||
259 | return AE_OK; | |
1da177e4 LT |
260 | } |
261 | ||
262 | ||
263 | /* see if it's worth looking at this bridge */ | |
e8c331e9 | 264 | static int detect_ejectable_slots(struct pci_bus *pbus) |
1da177e4 | 265 | { |
e8c331e9 KK |
266 | int found = acpi_pci_detect_ejectable(pbus); |
267 | if (!found) { | |
268 | acpi_handle bridge_handle = acpi_pci_get_bridge_handle(pbus); | |
d45e0855 JB |
269 | if (!bridge_handle) |
270 | return 0; | |
e8c331e9 KK |
271 | acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1, |
272 | is_pci_dock_device, (void *)&found, NULL); | |
273 | } | |
274 | return found; | |
1da177e4 LT |
275 | } |
276 | ||
277 | ||
1da177e4 LT |
278 | /* decode ACPI 2.0 _HPP hot plug parameters */ |
279 | static void decode_hpp(struct acpiphp_bridge *bridge) | |
280 | { | |
281 | acpi_status status; | |
1da177e4 | 282 | |
7430e34c | 283 | status = acpi_get_hp_params_from_firmware(bridge->pci_bus, &bridge->hpp); |
e22b7350 KK |
284 | if (ACPI_FAILURE(status) || |
285 | !bridge->hpp.t0 || (bridge->hpp.t0->revision > 1)) { | |
783c49fc | 286 | /* use default numbers */ |
e22b7350 KK |
287 | printk(KERN_WARNING |
288 | "%s: Could not get hotplug parameters. Use defaults\n", | |
66bef8c0 | 289 | __func__); |
e22b7350 KK |
290 | bridge->hpp.t0 = &bridge->hpp.type0_data; |
291 | bridge->hpp.t0->revision = 0; | |
292 | bridge->hpp.t0->cache_line_size = 0x10; | |
293 | bridge->hpp.t0->latency_timer = 0x40; | |
294 | bridge->hpp.t0->enable_serr = 0; | |
295 | bridge->hpp.t0->enable_perr = 0; | |
1da177e4 | 296 | } |
1da177e4 LT |
297 | } |
298 | ||
299 | ||
783c49fc | 300 | |
1da177e4 LT |
301 | /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ |
302 | static void init_bridge_misc(struct acpiphp_bridge *bridge) | |
303 | { | |
304 | acpi_status status; | |
305 | ||
306 | /* decode ACPI 2.0 _HPP (hot plug parameters) */ | |
307 | decode_hpp(bridge); | |
308 | ||
e27da381 MT |
309 | /* must be added to the list prior to calling register_slot */ |
310 | list_add(&bridge->list, &bridge_list); | |
311 | ||
1da177e4 LT |
312 | /* register all slot objects under this bridge */ |
313 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, | |
314 | register_slot, bridge, NULL); | |
e27da381 MT |
315 | if (ACPI_FAILURE(status)) { |
316 | list_del(&bridge->list); | |
317 | return; | |
318 | } | |
1da177e4 LT |
319 | |
320 | /* install notify handler */ | |
8e7561cf | 321 | if (bridge->type != BRIDGE_TYPE_HOST) { |
551bcb75 MT |
322 | if ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func) { |
323 | status = acpi_remove_notify_handler(bridge->func->handle, | |
324 | ACPI_SYSTEM_NOTIFY, | |
325 | handle_hotplug_event_func); | |
326 | if (ACPI_FAILURE(status)) | |
327 | err("failed to remove notify handler\n"); | |
328 | } | |
8e7561cf | 329 | status = acpi_install_notify_handler(bridge->handle, |
1da177e4 LT |
330 | ACPI_SYSTEM_NOTIFY, |
331 | handle_hotplug_event_bridge, | |
332 | bridge); | |
333 | ||
8e7561cf RS |
334 | if (ACPI_FAILURE(status)) { |
335 | err("failed to register interrupt notify handler\n"); | |
336 | } | |
1da177e4 | 337 | } |
1da177e4 LT |
338 | } |
339 | ||
340 | ||
551bcb75 MT |
341 | /* find acpiphp_func from acpiphp_bridge */ |
342 | static struct acpiphp_func *acpiphp_bridge_handle_to_function(acpi_handle handle) | |
343 | { | |
344 | struct list_head *node, *l; | |
345 | struct acpiphp_bridge *bridge; | |
346 | struct acpiphp_slot *slot; | |
347 | struct acpiphp_func *func; | |
348 | ||
349 | list_for_each(node, &bridge_list) { | |
350 | bridge = list_entry(node, struct acpiphp_bridge, list); | |
351 | for (slot = bridge->slots; slot; slot = slot->next) { | |
352 | list_for_each(l, &slot->funcs) { | |
353 | func = list_entry(l, struct acpiphp_func, | |
354 | sibling); | |
355 | if (func->handle == handle) | |
356 | return func; | |
357 | } | |
358 | } | |
359 | } | |
360 | ||
361 | return NULL; | |
362 | } | |
363 | ||
364 | ||
365 | static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge) | |
366 | { | |
367 | acpi_handle dummy_handle; | |
368 | ||
369 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
370 | "_STA", &dummy_handle))) | |
371 | bridge->flags |= BRIDGE_HAS_STA; | |
372 | ||
373 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
374 | "_EJ0", &dummy_handle))) | |
375 | bridge->flags |= BRIDGE_HAS_EJ0; | |
376 | ||
377 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
378 | "_PS0", &dummy_handle))) | |
379 | bridge->flags |= BRIDGE_HAS_PS0; | |
380 | ||
381 | if (ACPI_SUCCESS(acpi_get_handle(bridge->handle, | |
382 | "_PS3", &dummy_handle))) | |
383 | bridge->flags |= BRIDGE_HAS_PS3; | |
384 | ||
385 | /* is this ejectable p2p bridge? */ | |
386 | if (bridge->flags & BRIDGE_HAS_EJ0) { | |
387 | struct acpiphp_func *func; | |
388 | ||
389 | dbg("found ejectable p2p bridge\n"); | |
390 | ||
391 | /* make link between PCI bridge and PCI function */ | |
392 | func = acpiphp_bridge_handle_to_function(bridge->handle); | |
393 | if (!func) | |
394 | return; | |
395 | bridge->func = func; | |
396 | func->bridge = bridge; | |
397 | } | |
398 | } | |
399 | ||
400 | ||
1da177e4 | 401 | /* allocate and initialize host bridge data structure */ |
42f49a6a | 402 | static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus) |
1da177e4 | 403 | { |
1da177e4 LT |
404 | struct acpiphp_bridge *bridge; |
405 | ||
f5afe806 | 406 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
407 | if (bridge == NULL) |
408 | return; | |
409 | ||
1da177e4 LT |
410 | bridge->type = BRIDGE_TYPE_HOST; |
411 | bridge->handle = handle; | |
1da177e4 | 412 | |
42f49a6a | 413 | bridge->pci_bus = pci_bus; |
1da177e4 LT |
414 | |
415 | spin_lock_init(&bridge->res_lock); | |
416 | ||
1da177e4 LT |
417 | init_bridge_misc(bridge); |
418 | } | |
419 | ||
420 | ||
421 | /* allocate and initialize PCI-to-PCI bridge data structure */ | |
42f49a6a | 422 | static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev) |
1da177e4 LT |
423 | { |
424 | struct acpiphp_bridge *bridge; | |
1da177e4 | 425 | |
f5afe806 | 426 | bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); |
1da177e4 LT |
427 | if (bridge == NULL) { |
428 | err("out of memory\n"); | |
429 | return; | |
430 | } | |
431 | ||
1da177e4 LT |
432 | bridge->type = BRIDGE_TYPE_P2P; |
433 | bridge->handle = handle; | |
551bcb75 | 434 | config_p2p_bridge_flags(bridge); |
1da177e4 | 435 | |
42f49a6a RS |
436 | bridge->pci_dev = pci_dev_get(pci_dev); |
437 | bridge->pci_bus = pci_dev->subordinate; | |
1da177e4 LT |
438 | if (!bridge->pci_bus) { |
439 | err("This is not a PCI-to-PCI bridge!\n"); | |
42f49a6a | 440 | goto err; |
1da177e4 LT |
441 | } |
442 | ||
5d4a4b25 AC |
443 | /* |
444 | * Grab a ref to the subordinate PCI bus in case the bus is | |
445 | * removed via PCI core logical hotplug. The ref pins the bus | |
446 | * (which we access during module unload). | |
447 | */ | |
448 | get_device(&bridge->pci_bus->dev); | |
1da177e4 LT |
449 | spin_lock_init(&bridge->res_lock); |
450 | ||
1da177e4 | 451 | init_bridge_misc(bridge); |
42f49a6a RS |
452 | return; |
453 | err: | |
454 | pci_dev_put(pci_dev); | |
455 | kfree(bridge); | |
456 | return; | |
1da177e4 LT |
457 | } |
458 | ||
459 | ||
460 | /* callback routine to find P2P bridges */ | |
461 | static acpi_status | |
462 | find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
463 | { | |
464 | acpi_status status; | |
465 | acpi_handle dummy_handle; | |
27663c58 | 466 | unsigned long long tmp; |
42f49a6a | 467 | int device, function; |
1da177e4 | 468 | struct pci_dev *dev; |
42f49a6a | 469 | struct pci_bus *pci_bus = context; |
1da177e4 LT |
470 | |
471 | status = acpi_get_handle(handle, "_ADR", &dummy_handle); | |
472 | if (ACPI_FAILURE(status)) | |
473 | return AE_OK; /* continue */ | |
474 | ||
475 | status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp); | |
476 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 477 | dbg("%s: _ADR evaluation failure\n", __func__); |
1da177e4 LT |
478 | return AE_OK; |
479 | } | |
480 | ||
481 | device = (tmp >> 16) & 0xffff; | |
482 | function = tmp & 0xffff; | |
483 | ||
42f49a6a | 484 | dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function)); |
1da177e4 | 485 | |
42f49a6a RS |
486 | if (!dev || !dev->subordinate) |
487 | goto out; | |
1da177e4 LT |
488 | |
489 | /* check if this bridge has ejectable slots */ | |
e8c331e9 | 490 | if ((detect_ejectable_slots(dev->subordinate) > 0)) { |
1da177e4 | 491 | dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); |
42f49a6a | 492 | add_p2p_bridge(handle, dev); |
1da177e4 LT |
493 | } |
494 | ||
7c8f25da KK |
495 | /* search P2P bridges under this p2p bridge */ |
496 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
497 | find_p2p_bridge, dev->subordinate, NULL); | |
498 | if (ACPI_FAILURE(status)) | |
551bcb75 | 499 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
7c8f25da | 500 | |
42f49a6a RS |
501 | out: |
502 | pci_dev_put(dev); | |
1da177e4 LT |
503 | return AE_OK; |
504 | } | |
505 | ||
506 | ||
507 | /* find hot-pluggable slots, and then find P2P bridge */ | |
508 | static int add_bridge(acpi_handle handle) | |
509 | { | |
510 | acpi_status status; | |
27663c58 | 511 | unsigned long long tmp; |
1da177e4 LT |
512 | int seg, bus; |
513 | acpi_handle dummy_handle; | |
42f49a6a | 514 | struct pci_bus *pci_bus; |
1da177e4 LT |
515 | |
516 | /* if the bridge doesn't have _STA, we assume it is always there */ | |
517 | status = acpi_get_handle(handle, "_STA", &dummy_handle); | |
518 | if (ACPI_SUCCESS(status)) { | |
519 | status = acpi_evaluate_integer(handle, "_STA", NULL, &tmp); | |
520 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 521 | dbg("%s: _STA evaluation failure\n", __func__); |
1da177e4 LT |
522 | return 0; |
523 | } | |
524 | if ((tmp & ACPI_STA_FUNCTIONING) == 0) | |
525 | /* don't register this object */ | |
526 | return 0; | |
527 | } | |
528 | ||
529 | /* get PCI segment number */ | |
530 | status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp); | |
531 | ||
532 | seg = ACPI_SUCCESS(status) ? tmp : 0; | |
533 | ||
534 | /* get PCI bus number */ | |
535 | status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp); | |
536 | ||
537 | if (ACPI_SUCCESS(status)) { | |
538 | bus = tmp; | |
539 | } else { | |
540 | warn("can't get bus number, assuming 0\n"); | |
541 | bus = 0; | |
542 | } | |
543 | ||
42f49a6a RS |
544 | pci_bus = pci_find_bus(seg, bus); |
545 | if (!pci_bus) { | |
546 | err("Can't find bus %04x:%02x\n", seg, bus); | |
547 | return 0; | |
548 | } | |
549 | ||
1da177e4 | 550 | /* check if this bridge has ejectable slots */ |
e8c331e9 | 551 | if (detect_ejectable_slots(pci_bus) > 0) { |
1da177e4 | 552 | dbg("found PCI host-bus bridge with hot-pluggable slots\n"); |
42f49a6a | 553 | add_host_bridge(handle, pci_bus); |
1da177e4 LT |
554 | } |
555 | ||
1da177e4 LT |
556 | /* search P2P bridges under this host bridge */ |
557 | status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
42f49a6a | 558 | find_p2p_bridge, pci_bus, NULL); |
1da177e4 LT |
559 | |
560 | if (ACPI_FAILURE(status)) | |
551bcb75 | 561 | warn("find_p2p_bridge failed (error code = 0x%x)\n", status); |
1da177e4 LT |
562 | |
563 | return 0; | |
564 | } | |
565 | ||
42f49a6a RS |
566 | static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle) |
567 | { | |
568 | struct list_head *head; | |
569 | list_for_each(head, &bridge_list) { | |
570 | struct acpiphp_bridge *bridge = list_entry(head, | |
571 | struct acpiphp_bridge, list); | |
572 | if (bridge->handle == handle) | |
573 | return bridge; | |
574 | } | |
575 | ||
576 | return NULL; | |
577 | } | |
1da177e4 | 578 | |
364d5094 | 579 | static void cleanup_bridge(struct acpiphp_bridge *bridge) |
1da177e4 | 580 | { |
42f49a6a | 581 | struct list_head *list, *tmp; |
42f49a6a RS |
582 | struct acpiphp_slot *slot; |
583 | acpi_status status; | |
364d5094 | 584 | acpi_handle handle = bridge->handle; |
42f49a6a RS |
585 | |
586 | status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
587 | handle_hotplug_event_bridge); | |
588 | if (ACPI_FAILURE(status)) | |
589 | err("failed to remove notify handler\n"); | |
590 | ||
551bcb75 MT |
591 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
592 | ((bridge->flags & BRIDGE_HAS_EJ0) && bridge->func)) { | |
593 | status = acpi_install_notify_handler(bridge->func->handle, | |
594 | ACPI_SYSTEM_NOTIFY, | |
595 | handle_hotplug_event_func, | |
596 | bridge->func); | |
597 | if (ACPI_FAILURE(status)) | |
598 | err("failed to install interrupt notify handler\n"); | |
599 | } | |
600 | ||
42f49a6a RS |
601 | slot = bridge->slots; |
602 | while (slot) { | |
603 | struct acpiphp_slot *next = slot->next; | |
604 | list_for_each_safe (list, tmp, &slot->funcs) { | |
605 | struct acpiphp_func *func; | |
606 | func = list_entry(list, struct acpiphp_func, sibling); | |
4e8662bb KA |
607 | if (is_dock_device(func->handle)) { |
608 | unregister_hotplug_dock_device(func->handle); | |
609 | unregister_dock_notifier(&func->nb); | |
610 | } | |
20416ea5 KA |
611 | if (!(func->flags & FUNC_HAS_DCK)) { |
612 | status = acpi_remove_notify_handler(func->handle, | |
42f49a6a RS |
613 | ACPI_SYSTEM_NOTIFY, |
614 | handle_hotplug_event_func); | |
20416ea5 KA |
615 | if (ACPI_FAILURE(status)) |
616 | err("failed to remove notify handler\n"); | |
617 | } | |
42f49a6a RS |
618 | list_del(list); |
619 | kfree(func); | |
620 | } | |
e27da381 MT |
621 | acpiphp_unregister_hotplug_slot(slot); |
622 | list_del(&slot->funcs); | |
42f49a6a RS |
623 | kfree(slot); |
624 | slot = next; | |
625 | } | |
626 | ||
5d4a4b25 AC |
627 | /* |
628 | * Only P2P bridges have a pci_dev | |
629 | */ | |
630 | if (bridge->pci_dev) | |
631 | put_device(&bridge->pci_bus->dev); | |
632 | ||
42f49a6a RS |
633 | pci_dev_put(bridge->pci_dev); |
634 | list_del(&bridge->list); | |
635 | kfree(bridge); | |
1da177e4 LT |
636 | } |
637 | ||
364d5094 RS |
638 | static acpi_status |
639 | cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) | |
640 | { | |
641 | struct acpiphp_bridge *bridge; | |
642 | ||
551bcb75 MT |
643 | /* cleanup p2p bridges under this P2P bridge |
644 | in a depth-first manner */ | |
645 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, | |
646 | cleanup_p2p_bridge, NULL, NULL); | |
647 | ||
a13307ce AC |
648 | bridge = acpiphp_handle_to_bridge(handle); |
649 | if (bridge) | |
650 | cleanup_bridge(bridge); | |
651 | ||
364d5094 RS |
652 | return AE_OK; |
653 | } | |
654 | ||
655 | static void remove_bridge(acpi_handle handle) | |
656 | { | |
657 | struct acpiphp_bridge *bridge; | |
658 | ||
551bcb75 MT |
659 | /* cleanup p2p bridges under this host bridge |
660 | in a depth-first manner */ | |
661 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
662 | (u32)1, cleanup_p2p_bridge, NULL, NULL); | |
663 | ||
a13307ce AC |
664 | /* |
665 | * On root bridges with hotplug slots directly underneath (ie, | |
666 | * no p2p bridge inbetween), we call cleanup_bridge(). | |
667 | * | |
668 | * The else clause cleans up root bridges that either had no | |
669 | * hotplug slots at all, or had a p2p bridge underneath. | |
670 | */ | |
364d5094 | 671 | bridge = acpiphp_handle_to_bridge(handle); |
551bcb75 | 672 | if (bridge) |
364d5094 | 673 | cleanup_bridge(bridge); |
a13307ce AC |
674 | else |
675 | acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, | |
676 | handle_hotplug_event_bridge); | |
364d5094 | 677 | } |
1da177e4 | 678 | |
a0d399a8 KK |
679 | static struct pci_dev * get_apic_pci_info(acpi_handle handle) |
680 | { | |
a0d399a8 KK |
681 | struct pci_dev *dev; |
682 | ||
d6aa484c | 683 | dev = acpi_get_pci_dev(handle); |
a0d399a8 KK |
684 | if (!dev) |
685 | return NULL; | |
686 | ||
687 | if ((dev->class != PCI_CLASS_SYSTEM_PIC_IOAPIC) && | |
688 | (dev->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC)) | |
689 | { | |
690 | pci_dev_put(dev); | |
691 | return NULL; | |
692 | } | |
693 | ||
694 | return dev; | |
695 | } | |
696 | ||
697 | static int get_gsi_base(acpi_handle handle, u32 *gsi_base) | |
698 | { | |
699 | acpi_status status; | |
700 | int result = -1; | |
27663c58 | 701 | unsigned long long gsb; |
a0d399a8 KK |
702 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
703 | union acpi_object *obj; | |
704 | void *table; | |
705 | ||
706 | status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb); | |
707 | if (ACPI_SUCCESS(status)) { | |
708 | *gsi_base = (u32)gsb; | |
709 | return 0; | |
710 | } | |
711 | ||
712 | status = acpi_evaluate_object(handle, "_MAT", NULL, &buffer); | |
713 | if (ACPI_FAILURE(status) || !buffer.length || !buffer.pointer) | |
714 | return -1; | |
715 | ||
716 | obj = buffer.pointer; | |
717 | if (obj->type != ACPI_TYPE_BUFFER) | |
718 | goto out; | |
719 | ||
720 | table = obj->buffer.pointer; | |
15a58ed1 AS |
721 | switch (((struct acpi_subtable_header *)table)->type) { |
722 | case ACPI_MADT_TYPE_IO_SAPIC: | |
723 | *gsi_base = ((struct acpi_madt_io_sapic *)table)->global_irq_base; | |
a0d399a8 KK |
724 | result = 0; |
725 | break; | |
15a58ed1 AS |
726 | case ACPI_MADT_TYPE_IO_APIC: |
727 | *gsi_base = ((struct acpi_madt_io_apic *)table)->global_irq_base; | |
a0d399a8 KK |
728 | result = 0; |
729 | break; | |
730 | default: | |
731 | break; | |
732 | } | |
733 | out: | |
81b26bca | 734 | kfree(buffer.pointer); |
a0d399a8 KK |
735 | return result; |
736 | } | |
737 | ||
738 | static acpi_status | |
739 | ioapic_add(acpi_handle handle, u32 lvl, void *context, void **rv) | |
740 | { | |
741 | acpi_status status; | |
27663c58 | 742 | unsigned long long sta; |
a0d399a8 KK |
743 | acpi_handle tmp; |
744 | struct pci_dev *pdev; | |
745 | u32 gsi_base; | |
746 | u64 phys_addr; | |
600812ec | 747 | struct acpiphp_ioapic *ioapic; |
a0d399a8 KK |
748 | |
749 | /* Evaluate _STA if present */ | |
750 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
751 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
752 | return AE_CTRL_DEPTH; | |
753 | ||
754 | /* Scan only PCI bus scope */ | |
755 | status = acpi_get_handle(handle, "_HID", &tmp); | |
756 | if (ACPI_SUCCESS(status)) | |
757 | return AE_CTRL_DEPTH; | |
758 | ||
759 | if (get_gsi_base(handle, &gsi_base)) | |
760 | return AE_OK; | |
761 | ||
600812ec ST |
762 | ioapic = kmalloc(sizeof(*ioapic), GFP_KERNEL); |
763 | if (!ioapic) | |
764 | return AE_NO_MEMORY; | |
765 | ||
a0d399a8 KK |
766 | pdev = get_apic_pci_info(handle); |
767 | if (!pdev) | |
600812ec | 768 | goto exit_kfree; |
a0d399a8 | 769 | |
600812ec ST |
770 | if (pci_enable_device(pdev)) |
771 | goto exit_pci_dev_put; | |
a0d399a8 KK |
772 | |
773 | pci_set_master(pdev); | |
774 | ||
600812ec ST |
775 | if (pci_request_region(pdev, 0, "I/O APIC(acpiphp)")) |
776 | goto exit_pci_disable_device; | |
a0d399a8 KK |
777 | |
778 | phys_addr = pci_resource_start(pdev, 0); | |
600812ec ST |
779 | if (acpi_register_ioapic(handle, phys_addr, gsi_base)) |
780 | goto exit_pci_release_region; | |
781 | ||
782 | ioapic->gsi_base = gsi_base; | |
783 | ioapic->dev = pdev; | |
784 | spin_lock(&ioapic_list_lock); | |
785 | list_add_tail(&ioapic->list, &ioapic_list); | |
786 | spin_unlock(&ioapic_list_lock); | |
787 | ||
788 | return AE_OK; | |
789 | ||
790 | exit_pci_release_region: | |
791 | pci_release_region(pdev, 0); | |
792 | exit_pci_disable_device: | |
793 | pci_disable_device(pdev); | |
794 | exit_pci_dev_put: | |
795 | pci_dev_put(pdev); | |
796 | exit_kfree: | |
797 | kfree(ioapic); | |
798 | ||
799 | return AE_OK; | |
800 | } | |
801 | ||
802 | static acpi_status | |
803 | ioapic_remove(acpi_handle handle, u32 lvl, void *context, void **rv) | |
804 | { | |
805 | acpi_status status; | |
27663c58 | 806 | unsigned long long sta; |
600812ec ST |
807 | acpi_handle tmp; |
808 | u32 gsi_base; | |
809 | struct acpiphp_ioapic *pos, *n, *ioapic = NULL; | |
810 | ||
811 | /* Evaluate _STA if present */ | |
812 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
813 | if (ACPI_SUCCESS(status) && sta != ACPI_STA_ALL) | |
814 | return AE_CTRL_DEPTH; | |
815 | ||
816 | /* Scan only PCI bus scope */ | |
817 | status = acpi_get_handle(handle, "_HID", &tmp); | |
818 | if (ACPI_SUCCESS(status)) | |
819 | return AE_CTRL_DEPTH; | |
820 | ||
821 | if (get_gsi_base(handle, &gsi_base)) | |
a0d399a8 | 822 | return AE_OK; |
600812ec ST |
823 | |
824 | acpi_unregister_ioapic(handle, gsi_base); | |
825 | ||
826 | spin_lock(&ioapic_list_lock); | |
827 | list_for_each_entry_safe(pos, n, &ioapic_list, list) { | |
828 | if (pos->gsi_base != gsi_base) | |
829 | continue; | |
830 | ioapic = pos; | |
831 | list_del(&ioapic->list); | |
832 | break; | |
a0d399a8 | 833 | } |
600812ec ST |
834 | spin_unlock(&ioapic_list_lock); |
835 | ||
836 | if (!ioapic) | |
837 | return AE_OK; | |
838 | ||
839 | pci_release_region(ioapic->dev, 0); | |
840 | pci_disable_device(ioapic->dev); | |
841 | pci_dev_put(ioapic->dev); | |
842 | kfree(ioapic); | |
a0d399a8 KK |
843 | |
844 | return AE_OK; | |
845 | } | |
846 | ||
847 | static int acpiphp_configure_ioapics(acpi_handle handle) | |
848 | { | |
9b1d19ee | 849 | ioapic_add(handle, 0, NULL, NULL); |
a0d399a8 KK |
850 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, |
851 | ACPI_UINT32_MAX, ioapic_add, NULL, NULL); | |
852 | return 0; | |
853 | } | |
854 | ||
600812ec ST |
855 | static int acpiphp_unconfigure_ioapics(acpi_handle handle) |
856 | { | |
857 | ioapic_remove(handle, 0, NULL, NULL); | |
858 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
859 | ACPI_UINT32_MAX, ioapic_remove, NULL, NULL); | |
860 | return 0; | |
861 | } | |
862 | ||
1da177e4 LT |
863 | static int power_on_slot(struct acpiphp_slot *slot) |
864 | { | |
865 | acpi_status status; | |
866 | struct acpiphp_func *func; | |
867 | struct list_head *l; | |
868 | int retval = 0; | |
869 | ||
870 | /* if already enabled, just skip */ | |
871 | if (slot->flags & SLOT_POWEREDON) | |
872 | goto err_exit; | |
873 | ||
874 | list_for_each (l, &slot->funcs) { | |
875 | func = list_entry(l, struct acpiphp_func, sibling); | |
876 | ||
877 | if (func->flags & FUNC_HAS_PS0) { | |
66bef8c0 | 878 | dbg("%s: executing _PS0\n", __func__); |
1da177e4 LT |
879 | status = acpi_evaluate_object(func->handle, "_PS0", NULL, NULL); |
880 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 881 | warn("%s: _PS0 failed\n", __func__); |
1da177e4 LT |
882 | retval = -1; |
883 | goto err_exit; | |
884 | } else | |
885 | break; | |
886 | } | |
887 | } | |
888 | ||
889 | /* TBD: evaluate _STA to check if the slot is enabled */ | |
890 | ||
891 | slot->flags |= SLOT_POWEREDON; | |
892 | ||
893 | err_exit: | |
894 | return retval; | |
895 | } | |
896 | ||
897 | ||
898 | static int power_off_slot(struct acpiphp_slot *slot) | |
899 | { | |
900 | acpi_status status; | |
901 | struct acpiphp_func *func; | |
902 | struct list_head *l; | |
1da177e4 LT |
903 | |
904 | int retval = 0; | |
905 | ||
906 | /* if already disabled, just skip */ | |
907 | if ((slot->flags & SLOT_POWEREDON) == 0) | |
908 | goto err_exit; | |
909 | ||
910 | list_for_each (l, &slot->funcs) { | |
911 | func = list_entry(l, struct acpiphp_func, sibling); | |
912 | ||
2f523b15 | 913 | if (func->flags & FUNC_HAS_PS3) { |
1da177e4 LT |
914 | status = acpi_evaluate_object(func->handle, "_PS3", NULL, NULL); |
915 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 916 | warn("%s: _PS3 failed\n", __func__); |
1da177e4 LT |
917 | retval = -1; |
918 | goto err_exit; | |
919 | } else | |
920 | break; | |
921 | } | |
922 | } | |
923 | ||
1da177e4 LT |
924 | /* TBD: evaluate _STA to check if the slot is disabled */ |
925 | ||
926 | slot->flags &= (~SLOT_POWEREDON); | |
927 | ||
928 | err_exit: | |
929 | return retval; | |
930 | } | |
931 | ||
932 | ||
15a1ae74 KA |
933 | |
934 | /** | |
26e6c66e | 935 | * acpiphp_max_busnr - return the highest reserved bus number under the given bus. |
15a1ae74 | 936 | * @bus: bus to start search with |
15a1ae74 KA |
937 | */ |
938 | static unsigned char acpiphp_max_busnr(struct pci_bus *bus) | |
939 | { | |
940 | struct list_head *tmp; | |
941 | unsigned char max, n; | |
942 | ||
943 | /* | |
944 | * pci_bus_max_busnr will return the highest | |
945 | * reserved busnr for all these children. | |
946 | * that is equivalent to the bus->subordinate | |
947 | * value. We don't want to use the parent's | |
948 | * bus->subordinate value because it could have | |
949 | * padding in it. | |
950 | */ | |
951 | max = bus->secondary; | |
952 | ||
953 | list_for_each(tmp, &bus->children) { | |
954 | n = pci_bus_max_busnr(pci_bus_b(tmp)); | |
955 | if (n > max) | |
956 | max = n; | |
957 | } | |
958 | return max; | |
959 | } | |
960 | ||
961 | ||
15a1ae74 KA |
962 | /** |
963 | * acpiphp_bus_add - add a new bus to acpi subsystem | |
964 | * @func: acpiphp_func of the bridge | |
15a1ae74 KA |
965 | */ |
966 | static int acpiphp_bus_add(struct acpiphp_func *func) | |
967 | { | |
968 | acpi_handle phandle; | |
969 | struct acpi_device *device, *pdevice; | |
970 | int ret_val; | |
971 | ||
972 | acpi_get_parent(func->handle, &phandle); | |
973 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
974 | dbg("no parent device, assuming NULL\n"); | |
975 | pdevice = NULL; | |
976 | } | |
20416ea5 KA |
977 | if (!acpi_bus_get_device(func->handle, &device)) { |
978 | dbg("bus exists... trim\n"); | |
979 | /* this shouldn't be in here, so remove | |
980 | * the bus then re-add it... | |
981 | */ | |
982 | ret_val = acpi_bus_trim(device, 1); | |
983 | dbg("acpi_bus_trim return %x\n", ret_val); | |
984 | } | |
985 | ||
986 | ret_val = acpi_bus_add(&device, pdevice, func->handle, | |
987 | ACPI_BUS_TYPE_DEVICE); | |
988 | if (ret_val) { | |
989 | dbg("error adding bus, %x\n", | |
990 | -ret_val); | |
991 | goto acpiphp_bus_add_out; | |
15a1ae74 KA |
992 | } |
993 | /* | |
994 | * try to start anyway. We could have failed to add | |
995 | * simply because this bus had previously been added | |
996 | * on another add. Don't bother with the return value | |
997 | * we just keep going. | |
998 | */ | |
999 | ret_val = acpi_bus_start(device); | |
1000 | ||
1001 | acpiphp_bus_add_out: | |
1002 | return ret_val; | |
1003 | } | |
1004 | ||
1005 | ||
92c9be95 MT |
1006 | /** |
1007 | * acpiphp_bus_trim - trim a bus from acpi subsystem | |
1008 | * @handle: handle to acpi namespace | |
92c9be95 | 1009 | */ |
6d47a5e4 | 1010 | static int acpiphp_bus_trim(acpi_handle handle) |
92c9be95 MT |
1011 | { |
1012 | struct acpi_device *device; | |
1013 | int retval; | |
1014 | ||
1015 | retval = acpi_bus_get_device(handle, &device); | |
1016 | if (retval) { | |
1017 | dbg("acpi_device not found\n"); | |
1018 | return retval; | |
1019 | } | |
1020 | ||
1021 | retval = acpi_bus_trim(device, 1); | |
1022 | if (retval) | |
1023 | err("cannot remove from acpi list\n"); | |
1024 | ||
1025 | return retval; | |
1026 | } | |
15a1ae74 | 1027 | |
1da177e4 LT |
1028 | /** |
1029 | * enable_device - enable, configure a slot | |
1030 | * @slot: slot to be enabled | |
1031 | * | |
1032 | * This function should be called per *physical slot*, | |
1033 | * not per each slot object in ACPI namespace. | |
1da177e4 | 1034 | */ |
0ab2b57f | 1035 | static int __ref enable_device(struct acpiphp_slot *slot) |
1da177e4 | 1036 | { |
1da177e4 | 1037 | struct pci_dev *dev; |
42f49a6a | 1038 | struct pci_bus *bus = slot->bridge->pci_bus; |
1da177e4 LT |
1039 | struct list_head *l; |
1040 | struct acpiphp_func *func; | |
1041 | int retval = 0; | |
42f49a6a | 1042 | int num, max, pass; |
551bcb75 | 1043 | acpi_status status; |
1da177e4 LT |
1044 | |
1045 | if (slot->flags & SLOT_ENABLED) | |
1046 | goto err_exit; | |
1047 | ||
1048 | /* sanity check: dev should be NULL when hot-plugged in */ | |
42f49a6a | 1049 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, 0)); |
1da177e4 LT |
1050 | if (dev) { |
1051 | /* This case shouldn't happen */ | |
1052 | err("pci_dev structure already exists.\n"); | |
42f49a6a | 1053 | pci_dev_put(dev); |
1da177e4 LT |
1054 | retval = -1; |
1055 | goto err_exit; | |
1056 | } | |
1057 | ||
42f49a6a RS |
1058 | num = pci_scan_slot(bus, PCI_DEVFN(slot->device, 0)); |
1059 | if (num == 0) { | |
1da177e4 LT |
1060 | err("No new device found\n"); |
1061 | retval = -1; | |
1062 | goto err_exit; | |
1063 | } | |
1064 | ||
15a1ae74 | 1065 | max = acpiphp_max_busnr(bus); |
42f49a6a RS |
1066 | for (pass = 0; pass < 2; pass++) { |
1067 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1068 | if (PCI_SLOT(dev->devfn) != slot->device) | |
1069 | continue; | |
1070 | if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || | |
c64b5eea | 1071 | dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { |
42f49a6a | 1072 | max = pci_scan_bridge(bus, dev, max, pass); |
92c9be95 | 1073 | if (pass && dev->subordinate) |
c64b5eea KA |
1074 | pci_bus_size_bridges(dev->subordinate); |
1075 | } | |
42f49a6a | 1076 | } |
1da177e4 LT |
1077 | } |
1078 | ||
92c9be95 MT |
1079 | list_for_each (l, &slot->funcs) { |
1080 | func = list_entry(l, struct acpiphp_func, sibling); | |
1081 | acpiphp_bus_add(func); | |
1082 | } | |
1083 | ||
42f49a6a | 1084 | pci_bus_assign_resources(bus); |
8e5dce35 | 1085 | acpiphp_sanitize_bus(bus); |
287af2fb | 1086 | acpiphp_set_hpp_values(slot->bridge->handle, bus); |
9b1d19ee ST |
1087 | list_for_each_entry(func, &slot->funcs, sibling) |
1088 | acpiphp_configure_ioapics(func->handle); | |
8e5dce35 | 1089 | pci_enable_bridges(bus); |
42f49a6a RS |
1090 | pci_bus_add_devices(bus); |
1091 | ||
1da177e4 LT |
1092 | list_for_each (l, &slot->funcs) { |
1093 | func = list_entry(l, struct acpiphp_func, sibling); | |
9d911d79 AC |
1094 | dev = pci_get_slot(bus, PCI_DEVFN(slot->device, |
1095 | func->function)); | |
1096 | if (!dev) | |
551bcb75 MT |
1097 | continue; |
1098 | ||
9d911d79 AC |
1099 | if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE && |
1100 | dev->hdr_type != PCI_HEADER_TYPE_CARDBUS) { | |
1101 | pci_dev_put(dev); | |
551bcb75 | 1102 | continue; |
9d911d79 | 1103 | } |
551bcb75 MT |
1104 | |
1105 | status = find_p2p_bridge(func->handle, (u32)1, bus, NULL); | |
1106 | if (ACPI_FAILURE(status)) | |
1107 | warn("find_p2p_bridge failed (error code = 0x%x)\n", | |
1108 | status); | |
9d911d79 | 1109 | pci_dev_put(dev); |
1da177e4 LT |
1110 | } |
1111 | ||
1112 | slot->flags |= SLOT_ENABLED; | |
1113 | ||
1da177e4 LT |
1114 | err_exit: |
1115 | return retval; | |
1116 | } | |
1117 | ||
d5cdb672 ST |
1118 | static void disable_bridges(struct pci_bus *bus) |
1119 | { | |
1120 | struct pci_dev *dev; | |
1121 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1122 | if (dev->subordinate) { | |
1123 | disable_bridges(dev->subordinate); | |
1124 | pci_disable_device(dev); | |
1125 | } | |
1126 | } | |
1127 | } | |
1da177e4 LT |
1128 | |
1129 | /** | |
1130 | * disable_device - disable a slot | |
26e6c66e | 1131 | * @slot: ACPI PHP slot |
1da177e4 LT |
1132 | */ |
1133 | static int disable_device(struct acpiphp_slot *slot) | |
1134 | { | |
1da177e4 | 1135 | struct acpiphp_func *func; |
9d911d79 | 1136 | struct pci_dev *pdev; |
1da177e4 LT |
1137 | |
1138 | /* is this slot already disabled? */ | |
1139 | if (!(slot->flags & SLOT_ENABLED)) | |
1140 | goto err_exit; | |
1141 | ||
9d911d79 | 1142 | list_for_each_entry(func, &slot->funcs, sibling) { |
551bcb75 MT |
1143 | if (func->bridge) { |
1144 | /* cleanup p2p bridges under this P2P bridge */ | |
1145 | cleanup_p2p_bridge(func->bridge->handle, | |
1146 | (u32)1, NULL, NULL); | |
1147 | func->bridge = NULL; | |
1148 | } | |
1149 | ||
9d911d79 AC |
1150 | pdev = pci_get_slot(slot->bridge->pci_bus, |
1151 | PCI_DEVFN(slot->device, func->function)); | |
1152 | if (pdev) { | |
1153 | pci_stop_bus_device(pdev); | |
1154 | if (pdev->subordinate) { | |
1155 | disable_bridges(pdev->subordinate); | |
1156 | pci_disable_device(pdev); | |
d5cdb672 | 1157 | } |
9d911d79 AC |
1158 | pci_remove_bus_device(pdev); |
1159 | pci_dev_put(pdev); | |
d5cdb672 | 1160 | } |
600812ec ST |
1161 | } |
1162 | ||
9d911d79 | 1163 | list_for_each_entry(func, &slot->funcs, sibling) { |
600812ec | 1164 | acpiphp_unconfigure_ioapics(func->handle); |
92c9be95 | 1165 | acpiphp_bus_trim(func->handle); |
1da177e4 LT |
1166 | } |
1167 | ||
1168 | slot->flags &= (~SLOT_ENABLED); | |
1169 | ||
9d911d79 AC |
1170 | err_exit: |
1171 | return 0; | |
1da177e4 LT |
1172 | } |
1173 | ||
1174 | ||
1175 | /** | |
1176 | * get_slot_status - get ACPI slot status | |
26e6c66e | 1177 | * @slot: ACPI PHP slot |
1da177e4 | 1178 | * |
26e6c66e RD |
1179 | * If a slot has _STA for each function and if any one of them |
1180 | * returned non-zero status, return it. | |
1da177e4 | 1181 | * |
26e6c66e RD |
1182 | * If a slot doesn't have _STA and if any one of its functions' |
1183 | * configuration space is configured, return 0x0f as a _STA. | |
1da177e4 | 1184 | * |
26e6c66e | 1185 | * Otherwise return 0. |
1da177e4 LT |
1186 | */ |
1187 | static unsigned int get_slot_status(struct acpiphp_slot *slot) | |
1188 | { | |
1189 | acpi_status status; | |
27663c58 | 1190 | unsigned long long sta = 0; |
1da177e4 LT |
1191 | u32 dvid; |
1192 | struct list_head *l; | |
1193 | struct acpiphp_func *func; | |
1194 | ||
1195 | list_for_each (l, &slot->funcs) { | |
1196 | func = list_entry(l, struct acpiphp_func, sibling); | |
1197 | ||
1198 | if (func->flags & FUNC_HAS_STA) { | |
1199 | status = acpi_evaluate_integer(func->handle, "_STA", NULL, &sta); | |
1200 | if (ACPI_SUCCESS(status) && sta) | |
1201 | break; | |
1202 | } else { | |
1203 | pci_bus_read_config_dword(slot->bridge->pci_bus, | |
1204 | PCI_DEVFN(slot->device, | |
1205 | func->function), | |
1206 | PCI_VENDOR_ID, &dvid); | |
1207 | if (dvid != 0xffffffff) { | |
1208 | sta = ACPI_STA_ALL; | |
1209 | break; | |
1210 | } | |
1211 | } | |
1212 | } | |
1213 | ||
1214 | return (unsigned int)sta; | |
1215 | } | |
1216 | ||
8d50e332 RS |
1217 | /** |
1218 | * acpiphp_eject_slot - physically eject the slot | |
26e6c66e | 1219 | * @slot: ACPI PHP slot |
8d50e332 | 1220 | */ |
bfceafc5 | 1221 | int acpiphp_eject_slot(struct acpiphp_slot *slot) |
8d50e332 RS |
1222 | { |
1223 | acpi_status status; | |
1224 | struct acpiphp_func *func; | |
1225 | struct list_head *l; | |
1226 | struct acpi_object_list arg_list; | |
1227 | union acpi_object arg; | |
1228 | ||
1229 | list_for_each (l, &slot->funcs) { | |
1230 | func = list_entry(l, struct acpiphp_func, sibling); | |
1231 | ||
1232 | /* We don't want to call _EJ0 on non-existing functions. */ | |
1233 | if ((func->flags & FUNC_HAS_EJ0)) { | |
1234 | /* _EJ0 method take one argument */ | |
1235 | arg_list.count = 1; | |
1236 | arg_list.pointer = &arg; | |
1237 | arg.type = ACPI_TYPE_INTEGER; | |
1238 | arg.integer.value = 1; | |
1239 | ||
1240 | status = acpi_evaluate_object(func->handle, "_EJ0", &arg_list, NULL); | |
1241 | if (ACPI_FAILURE(status)) { | |
66bef8c0 | 1242 | warn("%s: _EJ0 failed\n", __func__); |
8d50e332 RS |
1243 | return -1; |
1244 | } else | |
1245 | break; | |
1246 | } | |
1247 | } | |
1248 | return 0; | |
1249 | } | |
1250 | ||
1da177e4 LT |
1251 | /** |
1252 | * acpiphp_check_bridge - re-enumerate devices | |
26e6c66e | 1253 | * @bridge: where to begin re-enumeration |
1da177e4 LT |
1254 | * |
1255 | * Iterate over all slots under this bridge and make sure that if a | |
1256 | * card is present they are enabled, and if not they are disabled. | |
1257 | */ | |
1258 | static int acpiphp_check_bridge(struct acpiphp_bridge *bridge) | |
1259 | { | |
1260 | struct acpiphp_slot *slot; | |
1261 | int retval = 0; | |
1262 | int enabled, disabled; | |
1263 | ||
1264 | enabled = disabled = 0; | |
1265 | ||
1266 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1267 | unsigned int status = get_slot_status(slot); | |
1268 | if (slot->flags & SLOT_ENABLED) { | |
1269 | if (status == ACPI_STA_ALL) | |
1270 | continue; | |
1271 | retval = acpiphp_disable_slot(slot); | |
1272 | if (retval) { | |
1273 | err("Error occurred in disabling\n"); | |
1274 | goto err_exit; | |
8d50e332 RS |
1275 | } else { |
1276 | acpiphp_eject_slot(slot); | |
1da177e4 LT |
1277 | } |
1278 | disabled++; | |
1279 | } else { | |
1280 | if (status != ACPI_STA_ALL) | |
1281 | continue; | |
1282 | retval = acpiphp_enable_slot(slot); | |
1283 | if (retval) { | |
1284 | err("Error occurred in enabling\n"); | |
1285 | goto err_exit; | |
1286 | } | |
1287 | enabled++; | |
1288 | } | |
1289 | } | |
1290 | ||
66bef8c0 | 1291 | dbg("%s: %d enabled, %d disabled\n", __func__, enabled, disabled); |
1da177e4 LT |
1292 | |
1293 | err_exit: | |
1294 | return retval; | |
1295 | } | |
1296 | ||
8e7561cf RS |
1297 | static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge) |
1298 | { | |
1299 | u16 pci_cmd, pci_bctl; | |
1300 | struct pci_dev *cdev; | |
1301 | ||
1302 | /* Program hpp values for this device */ | |
1303 | if (!(dev->hdr_type == PCI_HEADER_TYPE_NORMAL || | |
1304 | (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE && | |
1305 | (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI))) | |
1306 | return; | |
e22b7350 | 1307 | |
9ef2241b GH |
1308 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST) |
1309 | return; | |
1310 | ||
8e7561cf | 1311 | pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, |
e22b7350 | 1312 | bridge->hpp.t0->cache_line_size); |
8e7561cf | 1313 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, |
e22b7350 | 1314 | bridge->hpp.t0->latency_timer); |
8e7561cf | 1315 | pci_read_config_word(dev, PCI_COMMAND, &pci_cmd); |
e22b7350 | 1316 | if (bridge->hpp.t0->enable_serr) |
8e7561cf RS |
1317 | pci_cmd |= PCI_COMMAND_SERR; |
1318 | else | |
1319 | pci_cmd &= ~PCI_COMMAND_SERR; | |
e22b7350 | 1320 | if (bridge->hpp.t0->enable_perr) |
8e7561cf RS |
1321 | pci_cmd |= PCI_COMMAND_PARITY; |
1322 | else | |
1323 | pci_cmd &= ~PCI_COMMAND_PARITY; | |
1324 | pci_write_config_word(dev, PCI_COMMAND, pci_cmd); | |
1325 | ||
1326 | /* Program bridge control value and child devices */ | |
1327 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { | |
1328 | pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, | |
e22b7350 | 1329 | bridge->hpp.t0->latency_timer); |
8e7561cf | 1330 | pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); |
e22b7350 | 1331 | if (bridge->hpp.t0->enable_serr) |
8e7561cf RS |
1332 | pci_bctl |= PCI_BRIDGE_CTL_SERR; |
1333 | else | |
1334 | pci_bctl &= ~PCI_BRIDGE_CTL_SERR; | |
e22b7350 | 1335 | if (bridge->hpp.t0->enable_perr) |
8e7561cf RS |
1336 | pci_bctl |= PCI_BRIDGE_CTL_PARITY; |
1337 | else | |
1338 | pci_bctl &= ~PCI_BRIDGE_CTL_PARITY; | |
1339 | pci_write_config_word(dev, PCI_BRIDGE_CONTROL, pci_bctl); | |
1340 | if (dev->subordinate) { | |
1341 | list_for_each_entry(cdev, &dev->subordinate->devices, | |
1342 | bus_list) | |
1343 | program_hpp(cdev, bridge); | |
1344 | } | |
1345 | } | |
1346 | } | |
1347 | ||
1348 | static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus) | |
1349 | { | |
1350 | struct acpiphp_bridge bridge; | |
1351 | struct pci_dev *dev; | |
1352 | ||
1353 | memset(&bridge, 0, sizeof(bridge)); | |
1354 | bridge.handle = handle; | |
7430e34c | 1355 | bridge.pci_bus = bus; |
783c49fc | 1356 | bridge.pci_dev = bus->self; |
8e7561cf RS |
1357 | decode_hpp(&bridge); |
1358 | list_for_each_entry(dev, &bus->devices, bus_list) | |
1359 | program_hpp(dev, &bridge); | |
1360 | ||
1361 | } | |
1362 | ||
1363 | /* | |
1364 | * Remove devices for which we could not assign resources, call | |
1365 | * arch specific code to fix-up the bus | |
1366 | */ | |
1367 | static void acpiphp_sanitize_bus(struct pci_bus *bus) | |
1368 | { | |
1369 | struct pci_dev *dev; | |
1370 | int i; | |
1371 | unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; | |
1372 | ||
1373 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1374 | for (i=0; i<PCI_BRIDGE_RESOURCES; i++) { | |
1375 | struct resource *res = &dev->resource[i]; | |
1376 | if ((res->flags & type_mask) && !res->start && | |
1377 | res->end) { | |
1378 | /* Could not assign a required resources | |
1379 | * for this device, remove it */ | |
1380 | pci_remove_bus_device(dev); | |
1381 | break; | |
1382 | } | |
1383 | } | |
1384 | } | |
1385 | } | |
1386 | ||
1387 | /* Program resources in newly inserted bridge */ | |
1388 | static int acpiphp_configure_bridge (acpi_handle handle) | |
1389 | { | |
d6aa484c | 1390 | struct pci_dev *dev; |
8e7561cf RS |
1391 | struct pci_bus *bus; |
1392 | ||
d6aa484c AC |
1393 | dev = acpi_get_pci_dev(handle); |
1394 | if (!dev) { | |
8e7561cf RS |
1395 | err("cannot get PCI domain and bus number for bridge\n"); |
1396 | return -EINVAL; | |
1397 | } | |
d6aa484c AC |
1398 | |
1399 | bus = dev->bus; | |
8e7561cf RS |
1400 | |
1401 | pci_bus_size_bridges(bus); | |
1402 | pci_bus_assign_resources(bus); | |
1403 | acpiphp_sanitize_bus(bus); | |
1404 | acpiphp_set_hpp_values(handle, bus); | |
1405 | pci_enable_bridges(bus); | |
a0d399a8 | 1406 | acpiphp_configure_ioapics(handle); |
d6aa484c | 1407 | pci_dev_put(dev); |
8e7561cf RS |
1408 | return 0; |
1409 | } | |
1410 | ||
1411 | static void handle_bridge_insertion(acpi_handle handle, u32 type) | |
1412 | { | |
1413 | struct acpi_device *device, *pdevice; | |
1414 | acpi_handle phandle; | |
1415 | ||
1416 | if ((type != ACPI_NOTIFY_BUS_CHECK) && | |
1417 | (type != ACPI_NOTIFY_DEVICE_CHECK)) { | |
1418 | err("unexpected notification type %d\n", type); | |
1419 | return; | |
1420 | } | |
1421 | ||
1422 | acpi_get_parent(handle, &phandle); | |
1423 | if (acpi_bus_get_device(phandle, &pdevice)) { | |
1424 | dbg("no parent device, assuming NULL\n"); | |
1425 | pdevice = NULL; | |
1426 | } | |
1427 | if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) { | |
1428 | err("cannot add bridge to acpi list\n"); | |
1429 | return; | |
1430 | } | |
1431 | if (!acpiphp_configure_bridge(handle) && | |
1432 | !acpi_bus_start(device)) | |
1433 | add_bridge(handle); | |
1434 | else | |
1435 | err("cannot configure and start bridge\n"); | |
1436 | ||
1437 | } | |
1438 | ||
1da177e4 LT |
1439 | /* |
1440 | * ACPI event handlers | |
1441 | */ | |
1442 | ||
0bbd6424 GH |
1443 | static acpi_status |
1444 | count_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1445 | { | |
1446 | int *count = (int *)context; | |
1447 | struct acpiphp_bridge *bridge; | |
1448 | ||
1449 | bridge = acpiphp_handle_to_bridge(handle); | |
1450 | if (bridge) | |
1451 | (*count)++; | |
1452 | return AE_OK ; | |
1453 | } | |
1454 | ||
1455 | static acpi_status | |
1456 | check_sub_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1457 | { | |
1458 | struct acpiphp_bridge *bridge; | |
1459 | char objname[64]; | |
1460 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1461 | .pointer = objname }; | |
1462 | ||
1463 | bridge = acpiphp_handle_to_bridge(handle); | |
1464 | if (bridge) { | |
1465 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1466 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1467 | __func__, objname); |
0bbd6424 GH |
1468 | acpiphp_check_bridge(bridge); |
1469 | } | |
1470 | return AE_OK ; | |
1471 | } | |
1472 | ||
1da177e4 LT |
1473 | /** |
1474 | * handle_hotplug_event_bridge - handle ACPI event on bridges | |
1da177e4 LT |
1475 | * @handle: Notify()'ed acpi_handle |
1476 | * @type: Notify code | |
1477 | * @context: pointer to acpiphp_bridge structure | |
1478 | * | |
26e6c66e | 1479 | * Handles ACPI event notification on {host,p2p} bridges. |
1da177e4 LT |
1480 | */ |
1481 | static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *context) | |
1482 | { | |
1483 | struct acpiphp_bridge *bridge; | |
1484 | char objname[64]; | |
1485 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1486 | .pointer = objname }; | |
8e7561cf | 1487 | struct acpi_device *device; |
0bbd6424 | 1488 | int num_sub_bridges = 0; |
1da177e4 | 1489 | |
8e7561cf RS |
1490 | if (acpi_bus_get_device(handle, &device)) { |
1491 | /* This bridge must have just been physically inserted */ | |
1492 | handle_bridge_insertion(handle, type); | |
1493 | return; | |
1494 | } | |
1495 | ||
1496 | bridge = acpiphp_handle_to_bridge(handle); | |
0bbd6424 GH |
1497 | if (type == ACPI_NOTIFY_BUS_CHECK) { |
1498 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, ACPI_UINT32_MAX, | |
1499 | count_sub_bridges, &num_sub_bridges, NULL); | |
1500 | } | |
1501 | ||
1502 | if (!bridge && !num_sub_bridges) { | |
8e7561cf RS |
1503 | err("cannot get bridge info\n"); |
1504 | return; | |
1505 | } | |
1da177e4 LT |
1506 | |
1507 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1508 | ||
1509 | switch (type) { | |
1510 | case ACPI_NOTIFY_BUS_CHECK: | |
1511 | /* bus re-enumerate */ | |
66bef8c0 | 1512 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
0bbd6424 GH |
1513 | if (bridge) { |
1514 | dbg("%s: re-enumerating slots under %s\n", | |
66bef8c0 | 1515 | __func__, objname); |
0bbd6424 GH |
1516 | acpiphp_check_bridge(bridge); |
1517 | } | |
1518 | if (num_sub_bridges) | |
1519 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, | |
1520 | ACPI_UINT32_MAX, check_sub_bridges, NULL, NULL); | |
1da177e4 LT |
1521 | break; |
1522 | ||
1523 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1524 | /* device check */ | |
66bef8c0 | 1525 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1526 | acpiphp_check_bridge(bridge); |
1527 | break; | |
1528 | ||
1529 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1530 | /* wake event */ | |
66bef8c0 | 1531 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1532 | break; |
1533 | ||
1534 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1535 | /* request device eject */ | |
66bef8c0 | 1536 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
551bcb75 MT |
1537 | if ((bridge->type != BRIDGE_TYPE_HOST) && |
1538 | (bridge->flags & BRIDGE_HAS_EJ0)) { | |
1539 | struct acpiphp_slot *slot; | |
1540 | slot = bridge->func->slot; | |
1541 | if (!acpiphp_disable_slot(slot)) | |
1542 | acpiphp_eject_slot(slot); | |
1543 | } | |
1da177e4 LT |
1544 | break; |
1545 | ||
1546 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1547 | printk(KERN_ERR "Device %s cannot be configured due" | |
1548 | " to a frequency mismatch\n", objname); | |
1549 | break; | |
1550 | ||
1551 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1552 | printk(KERN_ERR "Device %s cannot be configured due" | |
1553 | " to a bus mode mismatch\n", objname); | |
1554 | break; | |
1555 | ||
1556 | case ACPI_NOTIFY_POWER_FAULT: | |
1557 | printk(KERN_ERR "Device %s has suffered a power fault\n", | |
1558 | objname); | |
1559 | break; | |
1560 | ||
1561 | default: | |
1562 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1563 | break; | |
1564 | } | |
1565 | } | |
1566 | ||
1da177e4 LT |
1567 | /** |
1568 | * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots) | |
1da177e4 LT |
1569 | * @handle: Notify()'ed acpi_handle |
1570 | * @type: Notify code | |
1571 | * @context: pointer to acpiphp_func structure | |
1572 | * | |
26e6c66e | 1573 | * Handles ACPI event notification on slots. |
1da177e4 | 1574 | */ |
2b85e130 | 1575 | static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) |
1da177e4 LT |
1576 | { |
1577 | struct acpiphp_func *func; | |
1578 | char objname[64]; | |
1579 | struct acpi_buffer buffer = { .length = sizeof(objname), | |
1580 | .pointer = objname }; | |
1581 | ||
1582 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1583 | ||
1584 | func = (struct acpiphp_func *)context; | |
1585 | ||
1586 | switch (type) { | |
1587 | case ACPI_NOTIFY_BUS_CHECK: | |
1588 | /* bus re-enumerate */ | |
66bef8c0 | 1589 | dbg("%s: Bus check notify on %s\n", __func__, objname); |
1da177e4 LT |
1590 | acpiphp_enable_slot(func->slot); |
1591 | break; | |
1592 | ||
1593 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1594 | /* device check : re-enumerate from parent bus */ | |
66bef8c0 | 1595 | dbg("%s: Device check notify on %s\n", __func__, objname); |
1da177e4 LT |
1596 | acpiphp_check_bridge(func->slot->bridge); |
1597 | break; | |
1598 | ||
1599 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1600 | /* wake event */ | |
66bef8c0 | 1601 | dbg("%s: Device wake notify on %s\n", __func__, objname); |
1da177e4 LT |
1602 | break; |
1603 | ||
1604 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1605 | /* request device eject */ | |
66bef8c0 | 1606 | dbg("%s: Device eject notify on %s\n", __func__, objname); |
8d50e332 RS |
1607 | if (!(acpiphp_disable_slot(func->slot))) |
1608 | acpiphp_eject_slot(func->slot); | |
1da177e4 LT |
1609 | break; |
1610 | ||
1611 | default: | |
1612 | warn("notify_handler: unknown event type 0x%x for %s\n", type, objname); | |
1613 | break; | |
1614 | } | |
1615 | } | |
1616 | ||
8e7561cf RS |
1617 | |
1618 | static acpi_status | |
1619 | find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) | |
1620 | { | |
1621 | int *count = (int *)context; | |
1622 | ||
27558203 | 1623 | if (acpi_is_root_bridge(handle)) { |
8e7561cf RS |
1624 | acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, |
1625 | handle_hotplug_event_bridge, NULL); | |
1626 | (*count)++; | |
1627 | } | |
1628 | return AE_OK ; | |
1629 | } | |
1da177e4 LT |
1630 | |
1631 | static struct acpi_pci_driver acpi_pci_hp_driver = { | |
1632 | .add = add_bridge, | |
1633 | .remove = remove_bridge, | |
1634 | }; | |
1635 | ||
1636 | /** | |
1637 | * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures | |
1da177e4 LT |
1638 | */ |
1639 | int __init acpiphp_glue_init(void) | |
1640 | { | |
8e7561cf | 1641 | int num = 0; |
1da177e4 | 1642 | |
8e7561cf RS |
1643 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
1644 | ACPI_UINT32_MAX, find_root_bridges, &num, NULL); | |
1da177e4 LT |
1645 | |
1646 | if (num <= 0) | |
1647 | return -1; | |
8e7561cf RS |
1648 | else |
1649 | acpi_pci_register_driver(&acpi_pci_hp_driver); | |
1da177e4 LT |
1650 | |
1651 | return 0; | |
1652 | } | |
1653 | ||
1654 | ||
1655 | /** | |
1656 | * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures | |
1657 | * | |
26e6c66e | 1658 | * This function frees all data allocated in acpiphp_glue_init(). |
1da177e4 | 1659 | */ |
031f30d2 | 1660 | void acpiphp_glue_exit(void) |
1da177e4 | 1661 | { |
1da177e4 LT |
1662 | acpi_pci_unregister_driver(&acpi_pci_hp_driver); |
1663 | } | |
1664 | ||
1665 | ||
1666 | /** | |
1667 | * acpiphp_get_num_slots - count number of slots in a system | |
1668 | */ | |
1669 | int __init acpiphp_get_num_slots(void) | |
1670 | { | |
1da177e4 | 1671 | struct acpiphp_bridge *bridge; |
467c442f | 1672 | int num_slots = 0; |
1da177e4 | 1673 | |
467c442f | 1674 | list_for_each_entry (bridge, &bridge_list, list) { |
42f49a6a RS |
1675 | dbg("Bus %04x:%02x has %d slot%s\n", |
1676 | pci_domain_nr(bridge->pci_bus), | |
1677 | bridge->pci_bus->number, bridge->nr_slots, | |
1678 | bridge->nr_slots == 1 ? "" : "s"); | |
1da177e4 LT |
1679 | num_slots += bridge->nr_slots; |
1680 | } | |
1681 | ||
42f49a6a | 1682 | dbg("Total %d slots\n", num_slots); |
1da177e4 LT |
1683 | return num_slots; |
1684 | } | |
1685 | ||
1686 | ||
1687 | #if 0 | |
1688 | /** | |
1689 | * acpiphp_for_each_slot - call function for each slot | |
1690 | * @fn: callback function | |
1691 | * @data: context to be passed to callback function | |
1da177e4 LT |
1692 | */ |
1693 | static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) | |
1694 | { | |
1695 | struct list_head *node; | |
1696 | struct acpiphp_bridge *bridge; | |
1697 | struct acpiphp_slot *slot; | |
1698 | int retval = 0; | |
1699 | ||
1700 | list_for_each (node, &bridge_list) { | |
1701 | bridge = (struct acpiphp_bridge *)node; | |
1702 | for (slot = bridge->slots; slot; slot = slot->next) { | |
1703 | retval = fn(slot, data); | |
1704 | if (!retval) | |
1705 | goto err_exit; | |
1706 | } | |
1707 | } | |
1708 | ||
1709 | err_exit: | |
1710 | return retval; | |
1711 | } | |
1712 | #endif | |
1713 | ||
1da177e4 LT |
1714 | |
1715 | /** | |
1716 | * acpiphp_enable_slot - power on slot | |
26e6c66e | 1717 | * @slot: ACPI PHP slot |
1da177e4 LT |
1718 | */ |
1719 | int acpiphp_enable_slot(struct acpiphp_slot *slot) | |
1720 | { | |
1721 | int retval; | |
1722 | ||
6aa4cdd0 | 1723 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1724 | |
1725 | /* wake up all functions */ | |
1726 | retval = power_on_slot(slot); | |
1727 | if (retval) | |
1728 | goto err_exit; | |
1729 | ||
cde0e5d7 | 1730 | if (get_slot_status(slot) == ACPI_STA_ALL) { |
1da177e4 LT |
1731 | /* configure all functions */ |
1732 | retval = enable_device(slot); | |
cde0e5d7 MT |
1733 | if (retval) |
1734 | power_off_slot(slot); | |
1735 | } else { | |
66bef8c0 | 1736 | dbg("%s: Slot status is not ACPI_STA_ALL\n", __func__); |
cde0e5d7 MT |
1737 | power_off_slot(slot); |
1738 | } | |
1da177e4 LT |
1739 | |
1740 | err_exit: | |
6aa4cdd0 | 1741 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1742 | return retval; |
1743 | } | |
1744 | ||
1da177e4 LT |
1745 | /** |
1746 | * acpiphp_disable_slot - power off slot | |
26e6c66e | 1747 | * @slot: ACPI PHP slot |
1da177e4 LT |
1748 | */ |
1749 | int acpiphp_disable_slot(struct acpiphp_slot *slot) | |
1750 | { | |
1751 | int retval = 0; | |
1752 | ||
6aa4cdd0 | 1753 | mutex_lock(&slot->crit_sect); |
1da177e4 LT |
1754 | |
1755 | /* unconfigure all functions */ | |
1756 | retval = disable_device(slot); | |
1757 | if (retval) | |
1758 | goto err_exit; | |
1759 | ||
1760 | /* power off all functions */ | |
1761 | retval = power_off_slot(slot); | |
1762 | if (retval) | |
1763 | goto err_exit; | |
1764 | ||
1da177e4 | 1765 | err_exit: |
6aa4cdd0 | 1766 | mutex_unlock(&slot->crit_sect); |
1da177e4 LT |
1767 | return retval; |
1768 | } | |
1769 | ||
1770 | ||
1771 | /* | |
1772 | * slot enabled: 1 | |
1773 | * slot disabled: 0 | |
1774 | */ | |
1775 | u8 acpiphp_get_power_status(struct acpiphp_slot *slot) | |
1776 | { | |
8d50e332 | 1777 | return (slot->flags & SLOT_POWEREDON); |
1da177e4 LT |
1778 | } |
1779 | ||
1780 | ||
1781 | /* | |
35ae61a0 MT |
1782 | * latch open: 1 |
1783 | * latch closed: 0 | |
1da177e4 LT |
1784 | */ |
1785 | u8 acpiphp_get_latch_status(struct acpiphp_slot *slot) | |
1786 | { | |
1787 | unsigned int sta; | |
1788 | ||
1789 | sta = get_slot_status(slot); | |
1790 | ||
35ae61a0 | 1791 | return (sta & ACPI_STA_SHOW_IN_UI) ? 0 : 1; |
1da177e4 LT |
1792 | } |
1793 | ||
1794 | ||
1795 | /* | |
1796 | * adapter presence : 1 | |
1797 | * absence : 0 | |
1798 | */ | |
1799 | u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot) | |
1800 | { | |
1801 | unsigned int sta; | |
1802 | ||
1803 | sta = get_slot_status(slot); | |
1804 | ||
1805 | return (sta == 0) ? 0 : 1; | |
1806 | } |