2 * ACPI PCI HotPlug glue functions to ACPI CA subsystem
4 * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
5 * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
6 * Copyright (C) 2002,2003 NEC Corporation
7 * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
8 * Copyright (C) 2003-2005 Hewlett Packard
9 * Copyright (C) 2005 Rajesh Shah (rajesh.shah@intel.com)
10 * Copyright (C) 2005 Intel Corporation
12 * All rights reserved.
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.
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
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.
29 * Send feedback to <kristen.c.accardi@intel.com>
34 * Lifetime rules for pci_dev:
35 * - The one in acpiphp_func has its refcount elevated by pci_get_slot()
36 * when the driver is loaded or when an insertion event occurs. It loses
37 * a refcount when its ejected or the driver unloads.
38 * - The one in acpiphp_bridge has its refcount elevated by pci_get_slot()
39 * when the bridge is scanned and it loses a refcount when the bridge
43 #include <linux/init.h>
44 #include <linux/module.h>
46 #include <linux/kernel.h>
47 #include <linux/pci.h>
48 #include <linux/pci_hotplug.h>
49 #include <linux/pci-acpi.h>
50 #include <linux/mutex.h>
55 static LIST_HEAD(bridge_list
);
56 static LIST_HEAD(ioapic_list
);
57 static DEFINE_SPINLOCK(ioapic_list_lock
);
59 #define MY_NAME "acpiphp_glue"
61 static void handle_hotplug_event_bridge (acpi_handle
, u32
, void *);
62 static void acpiphp_sanitize_bus(struct pci_bus
*bus
);
63 static void acpiphp_set_hpp_values(acpi_handle handle
, struct pci_bus
*bus
);
64 static void handle_hotplug_event_func(acpi_handle handle
, u32 type
, void *context
);
66 /* callback routine to check for the existence of a pci dock device */
68 is_pci_dock_device(acpi_handle handle
, u32 lvl
, void *context
, void **rv
)
70 int *count
= (int *)context
;
72 if (is_dock_device(handle
)) {
74 return AE_CTRL_TERMINATE
;
81 * the _DCK method can do funny things... and sometimes not
84 * TBD - figure out a way to only call fixups for
85 * systems that require them.
87 static int post_dock_fixups(struct notifier_block
*nb
, unsigned long val
,
90 struct acpiphp_func
*func
= container_of(nb
, struct acpiphp_func
, nb
);
91 struct pci_bus
*bus
= func
->slot
->bridge
->pci_bus
;
97 /* fixup bad _DCK function that rewrites
98 * secondary bridge on slot
100 pci_read_config_dword(bus
->self
,
104 if (((buses
>> 8) & 0xff) != bus
->secondary
) {
105 buses
= (buses
& 0xff000000)
106 | ((unsigned int)(bus
->primary
) << 0)
107 | ((unsigned int)(bus
->secondary
) << 8)
108 | ((unsigned int)(bus
->subordinate
) << 16);
109 pci_write_config_dword(bus
->self
, PCI_PRIMARY_BUS
, buses
);
115 static struct acpi_dock_ops acpiphp_dock_ops
= {
116 .handler
= handle_hotplug_event_func
,
119 /* callback routine to register each ACPI PCI slot object */
121 register_slot(acpi_handle handle
, u32 lvl
, void *context
, void **rv
)
123 struct acpiphp_bridge
*bridge
= (struct acpiphp_bridge
*)context
;
124 struct acpiphp_slot
*slot
;
125 struct acpiphp_func
*newfunc
;
127 acpi_status status
= AE_OK
;
128 unsigned long long adr
, sun
;
129 int device
, function
, retval
;
130 struct pci_bus
*pbus
= bridge
->pci_bus
;
132 if (!acpi_pci_check_ejectable(pbus
, handle
) && !is_dock_device(handle
))
135 acpi_evaluate_integer(handle
, "_ADR", NULL
, &adr
);
136 device
= (adr
>> 16) & 0xffff;
137 function
= adr
& 0xffff;
139 newfunc
= kzalloc(sizeof(struct acpiphp_func
), GFP_KERNEL
);
143 INIT_LIST_HEAD(&newfunc
->sibling
);
144 newfunc
->handle
= handle
;
145 newfunc
->function
= function
;
147 if (ACPI_SUCCESS(acpi_get_handle(handle
, "_EJ0", &tmp
)))
148 newfunc
->flags
= FUNC_HAS_EJ0
;
150 if (ACPI_SUCCESS(acpi_get_handle(handle
, "_STA", &tmp
)))
151 newfunc
->flags
|= FUNC_HAS_STA
;
153 if (ACPI_SUCCESS(acpi_get_handle(handle
, "_PS0", &tmp
)))
154 newfunc
->flags
|= FUNC_HAS_PS0
;
156 if (ACPI_SUCCESS(acpi_get_handle(handle
, "_PS3", &tmp
)))
157 newfunc
->flags
|= FUNC_HAS_PS3
;
159 if (ACPI_SUCCESS(acpi_get_handle(handle
, "_DCK", &tmp
)))
160 newfunc
->flags
|= FUNC_HAS_DCK
;
162 status
= acpi_evaluate_integer(handle
, "_SUN", NULL
, &sun
);
163 if (ACPI_FAILURE(status
)) {
165 * use the count of the number of slots we've found
166 * for the number of the slot
168 sun
= bridge
->nr_slots
+1;
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");
180 slot
= kzalloc(sizeof(struct acpiphp_slot
), GFP_KERNEL
);
186 slot
->bridge
= bridge
;
187 slot
->device
= device
;
189 INIT_LIST_HEAD(&slot
->funcs
);
190 mutex_init(&slot
->crit_sect
);
192 slot
->next
= bridge
->slots
;
193 bridge
->slots
= slot
;
197 dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n",
198 slot
->sun
, pci_domain_nr(pbus
), pbus
->number
, device
);
199 retval
= acpiphp_register_hotplug_slot(slot
);
201 if (retval
== -EBUSY
)
202 warn("Slot %llu already registered by another "
203 "hotplug driver\n", slot
->sun
);
205 warn("acpiphp_register_hotplug_slot failed "
206 "(err code = 0x%x)\n", retval
);
211 newfunc
->slot
= slot
;
212 list_add_tail(&newfunc
->sibling
, &slot
->funcs
);
214 /* associate corresponding pci_dev */
215 newfunc
->pci_dev
= pci_get_slot(pbus
, PCI_DEVFN(device
, function
));
216 if (newfunc
->pci_dev
) {
217 slot
->flags
|= (SLOT_ENABLED
| SLOT_POWEREDON
);
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
225 newfunc
->flags
&= ~FUNC_HAS_EJ0
;
226 if (register_hotplug_dock_device(handle
,
227 &acpiphp_dock_ops
, newfunc
))
228 dbg("failed to register dock device\n");
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.
234 newfunc
->nb
.notifier_call
= post_dock_fixups
;
235 if (register_dock_notifier(&newfunc
->nb
))
236 dbg("failed to register a dock notifier");
239 /* install notify handler */
240 if (!(newfunc
->flags
& FUNC_HAS_DCK
)) {
241 status
= acpi_install_notify_handler(handle
,
243 handle_hotplug_event_func
,
246 if (ACPI_FAILURE(status
))
247 err("failed to register interrupt notify handler\n");
255 bridge
->slots
= slot
->next
;
263 /* see if it's worth looking at this bridge */
264 static int detect_ejectable_slots(struct pci_bus
*pbus
)
266 int found
= acpi_pci_detect_ejectable(pbus
);
268 acpi_handle bridge_handle
= acpi_pci_get_bridge_handle(pbus
);
271 acpi_walk_namespace(ACPI_TYPE_DEVICE
, bridge_handle
, (u32
)1,
272 is_pci_dock_device
, (void *)&found
, NULL
);
278 /* decode ACPI 2.0 _HPP hot plug parameters */
279 static void decode_hpp(struct acpiphp_bridge
*bridge
)
283 status
= acpi_get_hp_params_from_firmware(bridge
->pci_bus
, &bridge
->hpp
);
284 if (ACPI_FAILURE(status
) ||
285 !bridge
->hpp
.t0
|| (bridge
->hpp
.t0
->revision
> 1)) {
286 /* use default numbers */
288 "%s: Could not get hotplug parameters. Use defaults\n",
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;
301 /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */
302 static void init_bridge_misc(struct acpiphp_bridge
*bridge
)
306 /* decode ACPI 2.0 _HPP (hot plug parameters) */
309 /* must be added to the list prior to calling register_slot */
310 list_add(&bridge
->list
, &bridge_list
);
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
);
315 if (ACPI_FAILURE(status
)) {
316 list_del(&bridge
->list
);
320 /* install notify handler */
321 if (bridge
->type
!= BRIDGE_TYPE_HOST
) {
322 if ((bridge
->flags
& BRIDGE_HAS_EJ0
) && bridge
->func
) {
323 status
= acpi_remove_notify_handler(bridge
->func
->handle
,
325 handle_hotplug_event_func
);
326 if (ACPI_FAILURE(status
))
327 err("failed to remove notify handler\n");
329 status
= acpi_install_notify_handler(bridge
->handle
,
331 handle_hotplug_event_bridge
,
334 if (ACPI_FAILURE(status
)) {
335 err("failed to register interrupt notify handler\n");
341 /* find acpiphp_func from acpiphp_bridge */
342 static struct acpiphp_func
*acpiphp_bridge_handle_to_function(acpi_handle handle
)
344 struct list_head
*node
, *l
;
345 struct acpiphp_bridge
*bridge
;
346 struct acpiphp_slot
*slot
;
347 struct acpiphp_func
*func
;
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
,
355 if (func
->handle
== handle
)
365 static inline void config_p2p_bridge_flags(struct acpiphp_bridge
*bridge
)
367 acpi_handle dummy_handle
;
369 if (ACPI_SUCCESS(acpi_get_handle(bridge
->handle
,
370 "_STA", &dummy_handle
)))
371 bridge
->flags
|= BRIDGE_HAS_STA
;
373 if (ACPI_SUCCESS(acpi_get_handle(bridge
->handle
,
374 "_EJ0", &dummy_handle
)))
375 bridge
->flags
|= BRIDGE_HAS_EJ0
;
377 if (ACPI_SUCCESS(acpi_get_handle(bridge
->handle
,
378 "_PS0", &dummy_handle
)))
379 bridge
->flags
|= BRIDGE_HAS_PS0
;
381 if (ACPI_SUCCESS(acpi_get_handle(bridge
->handle
,
382 "_PS3", &dummy_handle
)))
383 bridge
->flags
|= BRIDGE_HAS_PS3
;
385 /* is this ejectable p2p bridge? */
386 if (bridge
->flags
& BRIDGE_HAS_EJ0
) {
387 struct acpiphp_func
*func
;
389 dbg("found ejectable p2p bridge\n");
391 /* make link between PCI bridge and PCI function */
392 func
= acpiphp_bridge_handle_to_function(bridge
->handle
);
396 func
->bridge
= bridge
;
401 /* allocate and initialize host bridge data structure */
402 static void add_host_bridge(acpi_handle
*handle
, struct pci_bus
*pci_bus
)
404 struct acpiphp_bridge
*bridge
;
406 bridge
= kzalloc(sizeof(struct acpiphp_bridge
), GFP_KERNEL
);
410 bridge
->type
= BRIDGE_TYPE_HOST
;
411 bridge
->handle
= handle
;
413 bridge
->pci_bus
= pci_bus
;
415 spin_lock_init(&bridge
->res_lock
);
417 init_bridge_misc(bridge
);
421 /* allocate and initialize PCI-to-PCI bridge data structure */
422 static void add_p2p_bridge(acpi_handle
*handle
, struct pci_dev
*pci_dev
)
424 struct acpiphp_bridge
*bridge
;
426 bridge
= kzalloc(sizeof(struct acpiphp_bridge
), GFP_KERNEL
);
427 if (bridge
== NULL
) {
428 err("out of memory\n");
432 bridge
->type
= BRIDGE_TYPE_P2P
;
433 bridge
->handle
= handle
;
434 config_p2p_bridge_flags(bridge
);
436 bridge
->pci_dev
= pci_dev_get(pci_dev
);
437 bridge
->pci_bus
= pci_dev
->subordinate
;
438 if (!bridge
->pci_bus
) {
439 err("This is not a PCI-to-PCI bridge!\n");
443 spin_lock_init(&bridge
->res_lock
);
445 init_bridge_misc(bridge
);
448 pci_dev_put(pci_dev
);
454 /* callback routine to find P2P bridges */
456 find_p2p_bridge(acpi_handle handle
, u32 lvl
, void *context
, void **rv
)
459 acpi_handle dummy_handle
;
460 unsigned long long tmp
;
461 int device
, function
;
463 struct pci_bus
*pci_bus
= context
;
465 status
= acpi_get_handle(handle
, "_ADR", &dummy_handle
);
466 if (ACPI_FAILURE(status
))
467 return AE_OK
; /* continue */
469 status
= acpi_evaluate_integer(handle
, "_ADR", NULL
, &tmp
);
470 if (ACPI_FAILURE(status
)) {
471 dbg("%s: _ADR evaluation failure\n", __func__
);
475 device
= (tmp
>> 16) & 0xffff;
476 function
= tmp
& 0xffff;
478 dev
= pci_get_slot(pci_bus
, PCI_DEVFN(device
, function
));
480 if (!dev
|| !dev
->subordinate
)
483 /* check if this bridge has ejectable slots */
484 if ((detect_ejectable_slots(dev
->subordinate
) > 0)) {
485 dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev
));
486 add_p2p_bridge(handle
, dev
);
489 /* search P2P bridges under this p2p bridge */
490 status
= acpi_walk_namespace(ACPI_TYPE_DEVICE
, handle
, (u32
)1,
491 find_p2p_bridge
, dev
->subordinate
, NULL
);
492 if (ACPI_FAILURE(status
))
493 warn("find_p2p_bridge failed (error code = 0x%x)\n", status
);
501 /* find hot-pluggable slots, and then find P2P bridge */
502 static int add_bridge(acpi_handle handle
)
505 unsigned long long tmp
;
507 acpi_handle dummy_handle
;
508 struct pci_bus
*pci_bus
;
510 /* if the bridge doesn't have _STA, we assume it is always there */
511 status
= acpi_get_handle(handle
, "_STA", &dummy_handle
);
512 if (ACPI_SUCCESS(status
)) {
513 status
= acpi_evaluate_integer(handle
, "_STA", NULL
, &tmp
);
514 if (ACPI_FAILURE(status
)) {
515 dbg("%s: _STA evaluation failure\n", __func__
);
518 if ((tmp
& ACPI_STA_FUNCTIONING
) == 0)
519 /* don't register this object */
523 /* get PCI segment number */
524 status
= acpi_evaluate_integer(handle
, "_SEG", NULL
, &tmp
);
526 seg
= ACPI_SUCCESS(status
) ? tmp
: 0;
528 /* get PCI bus number */
529 status
= acpi_evaluate_integer(handle
, "_BBN", NULL
, &tmp
);
531 if (ACPI_SUCCESS(status
)) {
534 warn("can't get bus number, assuming 0\n");
538 pci_bus
= pci_find_bus(seg
, bus
);
540 err("Can't find bus %04x:%02x\n", seg
, bus
);
544 /* check if this bridge has ejectable slots */
545 if (detect_ejectable_slots(pci_bus
) > 0) {
546 dbg("found PCI host-bus bridge with hot-pluggable slots\n");
547 add_host_bridge(handle
, pci_bus
);
550 /* search P2P bridges under this host bridge */
551 status
= acpi_walk_namespace(ACPI_TYPE_DEVICE
, handle
, (u32
)1,
552 find_p2p_bridge
, pci_bus
, NULL
);
554 if (ACPI_FAILURE(status
))
555 warn("find_p2p_bridge failed (error code = 0x%x)\n", status
);
560 static struct acpiphp_bridge
*acpiphp_handle_to_bridge(acpi_handle handle
)
562 struct list_head
*head
;
563 list_for_each(head
, &bridge_list
) {
564 struct acpiphp_bridge
*bridge
= list_entry(head
,
565 struct acpiphp_bridge
, list
);
566 if (bridge
->handle
== handle
)
573 static void cleanup_bridge(struct acpiphp_bridge
*bridge
)
575 struct list_head
*list
, *tmp
;
576 struct acpiphp_slot
*slot
;
578 acpi_handle handle
= bridge
->handle
;
580 status
= acpi_remove_notify_handler(handle
, ACPI_SYSTEM_NOTIFY
,
581 handle_hotplug_event_bridge
);
582 if (ACPI_FAILURE(status
))
583 err("failed to remove notify handler\n");
585 if ((bridge
->type
!= BRIDGE_TYPE_HOST
) &&
586 ((bridge
->flags
& BRIDGE_HAS_EJ0
) && bridge
->func
)) {
587 status
= acpi_install_notify_handler(bridge
->func
->handle
,
589 handle_hotplug_event_func
,
591 if (ACPI_FAILURE(status
))
592 err("failed to install interrupt notify handler\n");
595 slot
= bridge
->slots
;
597 struct acpiphp_slot
*next
= slot
->next
;
598 list_for_each_safe (list
, tmp
, &slot
->funcs
) {
599 struct acpiphp_func
*func
;
600 func
= list_entry(list
, struct acpiphp_func
, sibling
);
601 if (is_dock_device(func
->handle
)) {
602 unregister_hotplug_dock_device(func
->handle
);
603 unregister_dock_notifier(&func
->nb
);
605 if (!(func
->flags
& FUNC_HAS_DCK
)) {
606 status
= acpi_remove_notify_handler(func
->handle
,
608 handle_hotplug_event_func
);
609 if (ACPI_FAILURE(status
))
610 err("failed to remove notify handler\n");
612 pci_dev_put(func
->pci_dev
);
616 acpiphp_unregister_hotplug_slot(slot
);
617 list_del(&slot
->funcs
);
622 pci_dev_put(bridge
->pci_dev
);
623 list_del(&bridge
->list
);
628 cleanup_p2p_bridge(acpi_handle handle
, u32 lvl
, void *context
, void **rv
)
630 struct acpiphp_bridge
*bridge
;
632 /* cleanup p2p bridges under this P2P bridge
633 in a depth-first manner */
634 acpi_walk_namespace(ACPI_TYPE_DEVICE
, handle
, (u32
)1,
635 cleanup_p2p_bridge
, NULL
, NULL
);
637 bridge
= acpiphp_handle_to_bridge(handle
);
639 cleanup_bridge(bridge
);
644 static void remove_bridge(acpi_handle handle
)
646 struct acpiphp_bridge
*bridge
;
648 /* cleanup p2p bridges under this host bridge
649 in a depth-first manner */
650 acpi_walk_namespace(ACPI_TYPE_DEVICE
, handle
,
651 (u32
)1, cleanup_p2p_bridge
, NULL
, NULL
);
654 * On root bridges with hotplug slots directly underneath (ie,
655 * no p2p bridge inbetween), we call cleanup_bridge().
657 * The else clause cleans up root bridges that either had no
658 * hotplug slots at all, or had a p2p bridge underneath.
660 bridge
= acpiphp_handle_to_bridge(handle
);
662 cleanup_bridge(bridge
);
664 acpi_remove_notify_handler(handle
, ACPI_SYSTEM_NOTIFY
,
665 handle_hotplug_event_bridge
);
668 static struct pci_dev
* get_apic_pci_info(acpi_handle handle
)
670 struct acpi_pci_id id
;
674 if (ACPI_FAILURE(acpi_get_pci_id(handle
, &id
)))
677 bus
= pci_find_bus(id
.segment
, id
.bus
);
681 dev
= pci_get_slot(bus
, PCI_DEVFN(id
.device
, id
.function
));
685 if ((dev
->class != PCI_CLASS_SYSTEM_PIC_IOAPIC
) &&
686 (dev
->class != PCI_CLASS_SYSTEM_PIC_IOXAPIC
))
695 static int get_gsi_base(acpi_handle handle
, u32
*gsi_base
)
699 unsigned long long gsb
;
700 struct acpi_buffer buffer
= {ACPI_ALLOCATE_BUFFER
, NULL
};
701 union acpi_object
*obj
;
704 status
= acpi_evaluate_integer(handle
, "_GSB", NULL
, &gsb
);
705 if (ACPI_SUCCESS(status
)) {
706 *gsi_base
= (u32
)gsb
;
710 status
= acpi_evaluate_object(handle
, "_MAT", NULL
, &buffer
);
711 if (ACPI_FAILURE(status
) || !buffer
.length
|| !buffer
.pointer
)
714 obj
= buffer
.pointer
;
715 if (obj
->type
!= ACPI_TYPE_BUFFER
)
718 table
= obj
->buffer
.pointer
;
719 switch (((struct acpi_subtable_header
*)table
)->type
) {
720 case ACPI_MADT_TYPE_IO_SAPIC
:
721 *gsi_base
= ((struct acpi_madt_io_sapic
*)table
)->global_irq_base
;
724 case ACPI_MADT_TYPE_IO_APIC
:
725 *gsi_base
= ((struct acpi_madt_io_apic
*)table
)->global_irq_base
;
732 kfree(buffer
.pointer
);
737 ioapic_add(acpi_handle handle
, u32 lvl
, void *context
, void **rv
)
740 unsigned long long sta
;
742 struct pci_dev
*pdev
;
745 struct acpiphp_ioapic
*ioapic
;
747 /* Evaluate _STA if present */
748 status
= acpi_evaluate_integer(handle
, "_STA", NULL
, &sta
);
749 if (ACPI_SUCCESS(status
) && sta
!= ACPI_STA_ALL
)
750 return AE_CTRL_DEPTH
;
752 /* Scan only PCI bus scope */
753 status
= acpi_get_handle(handle
, "_HID", &tmp
);
754 if (ACPI_SUCCESS(status
))
755 return AE_CTRL_DEPTH
;
757 if (get_gsi_base(handle
, &gsi_base
))
760 ioapic
= kmalloc(sizeof(*ioapic
), GFP_KERNEL
);
764 pdev
= get_apic_pci_info(handle
);
768 if (pci_enable_device(pdev
))
769 goto exit_pci_dev_put
;
771 pci_set_master(pdev
);
773 if (pci_request_region(pdev
, 0, "I/O APIC(acpiphp)"))
774 goto exit_pci_disable_device
;
776 phys_addr
= pci_resource_start(pdev
, 0);
777 if (acpi_register_ioapic(handle
, phys_addr
, gsi_base
))
778 goto exit_pci_release_region
;
780 ioapic
->gsi_base
= gsi_base
;
782 spin_lock(&ioapic_list_lock
);
783 list_add_tail(&ioapic
->list
, &ioapic_list
);
784 spin_unlock(&ioapic_list_lock
);
788 exit_pci_release_region
:
789 pci_release_region(pdev
, 0);
790 exit_pci_disable_device
:
791 pci_disable_device(pdev
);
801 ioapic_remove(acpi_handle handle
, u32 lvl
, void *context
, void **rv
)
804 unsigned long long sta
;
807 struct acpiphp_ioapic
*pos
, *n
, *ioapic
= NULL
;
809 /* Evaluate _STA if present */
810 status
= acpi_evaluate_integer(handle
, "_STA", NULL
, &sta
);
811 if (ACPI_SUCCESS(status
) && sta
!= ACPI_STA_ALL
)
812 return AE_CTRL_DEPTH
;
814 /* Scan only PCI bus scope */
815 status
= acpi_get_handle(handle
, "_HID", &tmp
);
816 if (ACPI_SUCCESS(status
))
817 return AE_CTRL_DEPTH
;
819 if (get_gsi_base(handle
, &gsi_base
))
822 acpi_unregister_ioapic(handle
, gsi_base
);
824 spin_lock(&ioapic_list_lock
);
825 list_for_each_entry_safe(pos
, n
, &ioapic_list
, list
) {
826 if (pos
->gsi_base
!= gsi_base
)
829 list_del(&ioapic
->list
);
832 spin_unlock(&ioapic_list_lock
);
837 pci_release_region(ioapic
->dev
, 0);
838 pci_disable_device(ioapic
->dev
);
839 pci_dev_put(ioapic
->dev
);
845 static int acpiphp_configure_ioapics(acpi_handle handle
)
847 ioapic_add(handle
, 0, NULL
, NULL
);
848 acpi_walk_namespace(ACPI_TYPE_DEVICE
, handle
,
849 ACPI_UINT32_MAX
, ioapic_add
, NULL
, NULL
);
853 static int acpiphp_unconfigure_ioapics(acpi_handle handle
)
855 ioapic_remove(handle
, 0, NULL
, NULL
);
856 acpi_walk_namespace(ACPI_TYPE_DEVICE
, handle
,
857 ACPI_UINT32_MAX
, ioapic_remove
, NULL
, NULL
);
861 static int power_on_slot(struct acpiphp_slot
*slot
)
864 struct acpiphp_func
*func
;
868 /* if already enabled, just skip */
869 if (slot
->flags
& SLOT_POWEREDON
)
872 list_for_each (l
, &slot
->funcs
) {
873 func
= list_entry(l
, struct acpiphp_func
, sibling
);
875 if (func
->flags
& FUNC_HAS_PS0
) {
876 dbg("%s: executing _PS0\n", __func__
);
877 status
= acpi_evaluate_object(func
->handle
, "_PS0", NULL
, NULL
);
878 if (ACPI_FAILURE(status
)) {
879 warn("%s: _PS0 failed\n", __func__
);
887 /* TBD: evaluate _STA to check if the slot is enabled */
889 slot
->flags
|= SLOT_POWEREDON
;
896 static int power_off_slot(struct acpiphp_slot
*slot
)
899 struct acpiphp_func
*func
;
904 /* if already disabled, just skip */
905 if ((slot
->flags
& SLOT_POWEREDON
) == 0)
908 list_for_each (l
, &slot
->funcs
) {
909 func
= list_entry(l
, struct acpiphp_func
, sibling
);
911 if (func
->flags
& FUNC_HAS_PS3
) {
912 status
= acpi_evaluate_object(func
->handle
, "_PS3", NULL
, NULL
);
913 if (ACPI_FAILURE(status
)) {
914 warn("%s: _PS3 failed\n", __func__
);
922 /* TBD: evaluate _STA to check if the slot is disabled */
924 slot
->flags
&= (~SLOT_POWEREDON
);
933 * acpiphp_max_busnr - return the highest reserved bus number under the given bus.
934 * @bus: bus to start search with
936 static unsigned char acpiphp_max_busnr(struct pci_bus
*bus
)
938 struct list_head
*tmp
;
939 unsigned char max
, n
;
942 * pci_bus_max_busnr will return the highest
943 * reserved busnr for all these children.
944 * that is equivalent to the bus->subordinate
945 * value. We don't want to use the parent's
946 * bus->subordinate value because it could have
949 max
= bus
->secondary
;
951 list_for_each(tmp
, &bus
->children
) {
952 n
= pci_bus_max_busnr(pci_bus_b(tmp
));
961 * acpiphp_bus_add - add a new bus to acpi subsystem
962 * @func: acpiphp_func of the bridge
964 static int acpiphp_bus_add(struct acpiphp_func
*func
)
967 struct acpi_device
*device
, *pdevice
;
970 acpi_get_parent(func
->handle
, &phandle
);
971 if (acpi_bus_get_device(phandle
, &pdevice
)) {
972 dbg("no parent device, assuming NULL\n");
975 if (!acpi_bus_get_device(func
->handle
, &device
)) {
976 dbg("bus exists... trim\n");
977 /* this shouldn't be in here, so remove
978 * the bus then re-add it...
980 ret_val
= acpi_bus_trim(device
, 1);
981 dbg("acpi_bus_trim return %x\n", ret_val
);
984 ret_val
= acpi_bus_add(&device
, pdevice
, func
->handle
,
985 ACPI_BUS_TYPE_DEVICE
);
987 dbg("error adding bus, %x\n",
989 goto acpiphp_bus_add_out
;
992 * try to start anyway. We could have failed to add
993 * simply because this bus had previously been added
994 * on another add. Don't bother with the return value
995 * we just keep going.
997 ret_val
= acpi_bus_start(device
);
1005 * acpiphp_bus_trim - trim a bus from acpi subsystem
1006 * @handle: handle to acpi namespace
1008 static int acpiphp_bus_trim(acpi_handle handle
)
1010 struct acpi_device
*device
;
1013 retval
= acpi_bus_get_device(handle
, &device
);
1015 dbg("acpi_device not found\n");
1019 retval
= acpi_bus_trim(device
, 1);
1021 err("cannot remove from acpi list\n");
1027 * enable_device - enable, configure a slot
1028 * @slot: slot to be enabled
1030 * This function should be called per *physical slot*,
1031 * not per each slot object in ACPI namespace.
1033 static int __ref
enable_device(struct acpiphp_slot
*slot
)
1035 struct pci_dev
*dev
;
1036 struct pci_bus
*bus
= slot
->bridge
->pci_bus
;
1037 struct list_head
*l
;
1038 struct acpiphp_func
*func
;
1043 if (slot
->flags
& SLOT_ENABLED
)
1046 /* sanity check: dev should be NULL when hot-plugged in */
1047 dev
= pci_get_slot(bus
, PCI_DEVFN(slot
->device
, 0));
1049 /* This case shouldn't happen */
1050 err("pci_dev structure already exists.\n");
1056 num
= pci_scan_slot(bus
, PCI_DEVFN(slot
->device
, 0));
1058 err("No new device found\n");
1063 max
= acpiphp_max_busnr(bus
);
1064 for (pass
= 0; pass
< 2; pass
++) {
1065 list_for_each_entry(dev
, &bus
->devices
, bus_list
) {
1066 if (PCI_SLOT(dev
->devfn
) != slot
->device
)
1068 if (dev
->hdr_type
== PCI_HEADER_TYPE_BRIDGE
||
1069 dev
->hdr_type
== PCI_HEADER_TYPE_CARDBUS
) {
1070 max
= pci_scan_bridge(bus
, dev
, max
, pass
);
1071 if (pass
&& dev
->subordinate
)
1072 pci_bus_size_bridges(dev
->subordinate
);
1077 list_for_each (l
, &slot
->funcs
) {
1078 func
= list_entry(l
, struct acpiphp_func
, sibling
);
1079 acpiphp_bus_add(func
);
1082 pci_bus_assign_resources(bus
);
1083 acpiphp_sanitize_bus(bus
);
1084 acpiphp_set_hpp_values(slot
->bridge
->handle
, bus
);
1085 list_for_each_entry(func
, &slot
->funcs
, sibling
)
1086 acpiphp_configure_ioapics(func
->handle
);
1087 pci_enable_bridges(bus
);
1088 pci_bus_add_devices(bus
);
1090 /* associate pci_dev to our representation */
1091 list_for_each (l
, &slot
->funcs
) {
1092 func
= list_entry(l
, struct acpiphp_func
, sibling
);
1093 func
->pci_dev
= pci_get_slot(bus
, PCI_DEVFN(slot
->device
,
1098 if (func
->pci_dev
->hdr_type
!= PCI_HEADER_TYPE_BRIDGE
&&
1099 func
->pci_dev
->hdr_type
!= PCI_HEADER_TYPE_CARDBUS
)
1102 status
= find_p2p_bridge(func
->handle
, (u32
)1, bus
, NULL
);
1103 if (ACPI_FAILURE(status
))
1104 warn("find_p2p_bridge failed (error code = 0x%x)\n",
1108 slot
->flags
|= SLOT_ENABLED
;
1114 static void disable_bridges(struct pci_bus
*bus
)
1116 struct pci_dev
*dev
;
1117 list_for_each_entry(dev
, &bus
->devices
, bus_list
) {
1118 if (dev
->subordinate
) {
1119 disable_bridges(dev
->subordinate
);
1120 pci_disable_device(dev
);
1126 * disable_device - disable a slot
1127 * @slot: ACPI PHP slot
1129 static int disable_device(struct acpiphp_slot
*slot
)
1132 struct acpiphp_func
*func
;
1133 struct list_head
*l
;
1135 /* is this slot already disabled? */
1136 if (!(slot
->flags
& SLOT_ENABLED
))
1139 list_for_each (l
, &slot
->funcs
) {
1140 func
= list_entry(l
, struct acpiphp_func
, sibling
);
1143 /* cleanup p2p bridges under this P2P bridge */
1144 cleanup_p2p_bridge(func
->bridge
->handle
,
1145 (u32
)1, NULL
, NULL
);
1146 func
->bridge
= NULL
;
1149 if (func
->pci_dev
) {
1150 pci_stop_bus_device(func
->pci_dev
);
1151 if (func
->pci_dev
->subordinate
) {
1152 disable_bridges(func
->pci_dev
->subordinate
);
1153 pci_disable_device(func
->pci_dev
);
1158 list_for_each (l
, &slot
->funcs
) {
1159 func
= list_entry(l
, struct acpiphp_func
, sibling
);
1161 acpiphp_unconfigure_ioapics(func
->handle
);
1162 acpiphp_bus_trim(func
->handle
);
1163 /* try to remove anyway.
1164 * acpiphp_bus_add might have been failed */
1169 pci_remove_bus_device(func
->pci_dev
);
1170 pci_dev_put(func
->pci_dev
);
1171 func
->pci_dev
= NULL
;
1174 slot
->flags
&= (~SLOT_ENABLED
);
1182 * get_slot_status - get ACPI slot status
1183 * @slot: ACPI PHP slot
1185 * If a slot has _STA for each function and if any one of them
1186 * returned non-zero status, return it.
1188 * If a slot doesn't have _STA and if any one of its functions'
1189 * configuration space is configured, return 0x0f as a _STA.
1191 * Otherwise return 0.
1193 static unsigned int get_slot_status(struct acpiphp_slot
*slot
)
1196 unsigned long long sta
= 0;
1198 struct list_head
*l
;
1199 struct acpiphp_func
*func
;
1201 list_for_each (l
, &slot
->funcs
) {
1202 func
= list_entry(l
, struct acpiphp_func
, sibling
);
1204 if (func
->flags
& FUNC_HAS_STA
) {
1205 status
= acpi_evaluate_integer(func
->handle
, "_STA", NULL
, &sta
);
1206 if (ACPI_SUCCESS(status
) && sta
)
1209 pci_bus_read_config_dword(slot
->bridge
->pci_bus
,
1210 PCI_DEVFN(slot
->device
,
1212 PCI_VENDOR_ID
, &dvid
);
1213 if (dvid
!= 0xffffffff) {
1220 return (unsigned int)sta
;
1224 * acpiphp_eject_slot - physically eject the slot
1225 * @slot: ACPI PHP slot
1227 int acpiphp_eject_slot(struct acpiphp_slot
*slot
)
1230 struct acpiphp_func
*func
;
1231 struct list_head
*l
;
1232 struct acpi_object_list arg_list
;
1233 union acpi_object arg
;
1235 list_for_each (l
, &slot
->funcs
) {
1236 func
= list_entry(l
, struct acpiphp_func
, sibling
);
1238 /* We don't want to call _EJ0 on non-existing functions. */
1239 if ((func
->flags
& FUNC_HAS_EJ0
)) {
1240 /* _EJ0 method take one argument */
1242 arg_list
.pointer
= &arg
;
1243 arg
.type
= ACPI_TYPE_INTEGER
;
1244 arg
.integer
.value
= 1;
1246 status
= acpi_evaluate_object(func
->handle
, "_EJ0", &arg_list
, NULL
);
1247 if (ACPI_FAILURE(status
)) {
1248 warn("%s: _EJ0 failed\n", __func__
);
1258 * acpiphp_check_bridge - re-enumerate devices
1259 * @bridge: where to begin re-enumeration
1261 * Iterate over all slots under this bridge and make sure that if a
1262 * card is present they are enabled, and if not they are disabled.
1264 static int acpiphp_check_bridge(struct acpiphp_bridge
*bridge
)
1266 struct acpiphp_slot
*slot
;
1268 int enabled
, disabled
;
1270 enabled
= disabled
= 0;
1272 for (slot
= bridge
->slots
; slot
; slot
= slot
->next
) {
1273 unsigned int status
= get_slot_status(slot
);
1274 if (slot
->flags
& SLOT_ENABLED
) {
1275 if (status
== ACPI_STA_ALL
)
1277 retval
= acpiphp_disable_slot(slot
);
1279 err("Error occurred in disabling\n");
1282 acpiphp_eject_slot(slot
);
1286 if (status
!= ACPI_STA_ALL
)
1288 retval
= acpiphp_enable_slot(slot
);
1290 err("Error occurred in enabling\n");
1297 dbg("%s: %d enabled, %d disabled\n", __func__
, enabled
, disabled
);
1303 static void program_hpp(struct pci_dev
*dev
, struct acpiphp_bridge
*bridge
)
1305 u16 pci_cmd
, pci_bctl
;
1306 struct pci_dev
*cdev
;
1308 /* Program hpp values for this device */
1309 if (!(dev
->hdr_type
== PCI_HEADER_TYPE_NORMAL
||
1310 (dev
->hdr_type
== PCI_HEADER_TYPE_BRIDGE
&&
1311 (dev
->class >> 8) == PCI_CLASS_BRIDGE_PCI
)))
1314 if ((dev
->class >> 8) == PCI_CLASS_BRIDGE_HOST
)
1317 pci_write_config_byte(dev
, PCI_CACHE_LINE_SIZE
,
1318 bridge
->hpp
.t0
->cache_line_size
);
1319 pci_write_config_byte(dev
, PCI_LATENCY_TIMER
,
1320 bridge
->hpp
.t0
->latency_timer
);
1321 pci_read_config_word(dev
, PCI_COMMAND
, &pci_cmd
);
1322 if (bridge
->hpp
.t0
->enable_serr
)
1323 pci_cmd
|= PCI_COMMAND_SERR
;
1325 pci_cmd
&= ~PCI_COMMAND_SERR
;
1326 if (bridge
->hpp
.t0
->enable_perr
)
1327 pci_cmd
|= PCI_COMMAND_PARITY
;
1329 pci_cmd
&= ~PCI_COMMAND_PARITY
;
1330 pci_write_config_word(dev
, PCI_COMMAND
, pci_cmd
);
1332 /* Program bridge control value and child devices */
1333 if ((dev
->class >> 8) == PCI_CLASS_BRIDGE_PCI
) {
1334 pci_write_config_byte(dev
, PCI_SEC_LATENCY_TIMER
,
1335 bridge
->hpp
.t0
->latency_timer
);
1336 pci_read_config_word(dev
, PCI_BRIDGE_CONTROL
, &pci_bctl
);
1337 if (bridge
->hpp
.t0
->enable_serr
)
1338 pci_bctl
|= PCI_BRIDGE_CTL_SERR
;
1340 pci_bctl
&= ~PCI_BRIDGE_CTL_SERR
;
1341 if (bridge
->hpp
.t0
->enable_perr
)
1342 pci_bctl
|= PCI_BRIDGE_CTL_PARITY
;
1344 pci_bctl
&= ~PCI_BRIDGE_CTL_PARITY
;
1345 pci_write_config_word(dev
, PCI_BRIDGE_CONTROL
, pci_bctl
);
1346 if (dev
->subordinate
) {
1347 list_for_each_entry(cdev
, &dev
->subordinate
->devices
,
1349 program_hpp(cdev
, bridge
);
1354 static void acpiphp_set_hpp_values(acpi_handle handle
, struct pci_bus
*bus
)
1356 struct acpiphp_bridge bridge
;
1357 struct pci_dev
*dev
;
1359 memset(&bridge
, 0, sizeof(bridge
));
1360 bridge
.handle
= handle
;
1361 bridge
.pci_bus
= bus
;
1362 bridge
.pci_dev
= bus
->self
;
1363 decode_hpp(&bridge
);
1364 list_for_each_entry(dev
, &bus
->devices
, bus_list
)
1365 program_hpp(dev
, &bridge
);
1370 * Remove devices for which we could not assign resources, call
1371 * arch specific code to fix-up the bus
1373 static void acpiphp_sanitize_bus(struct pci_bus
*bus
)
1375 struct pci_dev
*dev
;
1377 unsigned long type_mask
= IORESOURCE_IO
| IORESOURCE_MEM
;
1379 list_for_each_entry(dev
, &bus
->devices
, bus_list
) {
1380 for (i
=0; i
<PCI_BRIDGE_RESOURCES
; i
++) {
1381 struct resource
*res
= &dev
->resource
[i
];
1382 if ((res
->flags
& type_mask
) && !res
->start
&&
1384 /* Could not assign a required resources
1385 * for this device, remove it */
1386 pci_remove_bus_device(dev
);
1393 /* Program resources in newly inserted bridge */
1394 static int acpiphp_configure_bridge (acpi_handle handle
)
1396 struct acpi_pci_id pci_id
;
1397 struct pci_bus
*bus
;
1399 if (ACPI_FAILURE(acpi_get_pci_id(handle
, &pci_id
))) {
1400 err("cannot get PCI domain and bus number for bridge\n");
1403 bus
= pci_find_bus(pci_id
.segment
, pci_id
.bus
);
1405 err("cannot find bus %d:%d\n",
1406 pci_id
.segment
, pci_id
.bus
);
1410 pci_bus_size_bridges(bus
);
1411 pci_bus_assign_resources(bus
);
1412 acpiphp_sanitize_bus(bus
);
1413 acpiphp_set_hpp_values(handle
, bus
);
1414 pci_enable_bridges(bus
);
1415 acpiphp_configure_ioapics(handle
);
1419 static void handle_bridge_insertion(acpi_handle handle
, u32 type
)
1421 struct acpi_device
*device
, *pdevice
;
1422 acpi_handle phandle
;
1424 if ((type
!= ACPI_NOTIFY_BUS_CHECK
) &&
1425 (type
!= ACPI_NOTIFY_DEVICE_CHECK
)) {
1426 err("unexpected notification type %d\n", type
);
1430 acpi_get_parent(handle
, &phandle
);
1431 if (acpi_bus_get_device(phandle
, &pdevice
)) {
1432 dbg("no parent device, assuming NULL\n");
1435 if (acpi_bus_add(&device
, pdevice
, handle
, ACPI_BUS_TYPE_DEVICE
)) {
1436 err("cannot add bridge to acpi list\n");
1439 if (!acpiphp_configure_bridge(handle
) &&
1440 !acpi_bus_start(device
))
1443 err("cannot configure and start bridge\n");
1448 * ACPI event handlers
1452 count_sub_bridges(acpi_handle handle
, u32 lvl
, void *context
, void **rv
)
1454 int *count
= (int *)context
;
1455 struct acpiphp_bridge
*bridge
;
1457 bridge
= acpiphp_handle_to_bridge(handle
);
1464 check_sub_bridges(acpi_handle handle
, u32 lvl
, void *context
, void **rv
)
1466 struct acpiphp_bridge
*bridge
;
1468 struct acpi_buffer buffer
= { .length
= sizeof(objname
),
1469 .pointer
= objname
};
1471 bridge
= acpiphp_handle_to_bridge(handle
);
1473 acpi_get_name(handle
, ACPI_FULL_PATHNAME
, &buffer
);
1474 dbg("%s: re-enumerating slots under %s\n",
1476 acpiphp_check_bridge(bridge
);
1482 * handle_hotplug_event_bridge - handle ACPI event on bridges
1483 * @handle: Notify()'ed acpi_handle
1484 * @type: Notify code
1485 * @context: pointer to acpiphp_bridge structure
1487 * Handles ACPI event notification on {host,p2p} bridges.
1489 static void handle_hotplug_event_bridge(acpi_handle handle
, u32 type
, void *context
)
1491 struct acpiphp_bridge
*bridge
;
1493 struct acpi_buffer buffer
= { .length
= sizeof(objname
),
1494 .pointer
= objname
};
1495 struct acpi_device
*device
;
1496 int num_sub_bridges
= 0;
1498 if (acpi_bus_get_device(handle
, &device
)) {
1499 /* This bridge must have just been physically inserted */
1500 handle_bridge_insertion(handle
, type
);
1504 bridge
= acpiphp_handle_to_bridge(handle
);
1505 if (type
== ACPI_NOTIFY_BUS_CHECK
) {
1506 acpi_walk_namespace(ACPI_TYPE_DEVICE
, handle
, ACPI_UINT32_MAX
,
1507 count_sub_bridges
, &num_sub_bridges
, NULL
);
1510 if (!bridge
&& !num_sub_bridges
) {
1511 err("cannot get bridge info\n");
1515 acpi_get_name(handle
, ACPI_FULL_PATHNAME
, &buffer
);
1518 case ACPI_NOTIFY_BUS_CHECK
:
1519 /* bus re-enumerate */
1520 dbg("%s: Bus check notify on %s\n", __func__
, objname
);
1522 dbg("%s: re-enumerating slots under %s\n",
1524 acpiphp_check_bridge(bridge
);
1526 if (num_sub_bridges
)
1527 acpi_walk_namespace(ACPI_TYPE_DEVICE
, handle
,
1528 ACPI_UINT32_MAX
, check_sub_bridges
, NULL
, NULL
);
1531 case ACPI_NOTIFY_DEVICE_CHECK
:
1533 dbg("%s: Device check notify on %s\n", __func__
, objname
);
1534 acpiphp_check_bridge(bridge
);
1537 case ACPI_NOTIFY_DEVICE_WAKE
:
1539 dbg("%s: Device wake notify on %s\n", __func__
, objname
);
1542 case ACPI_NOTIFY_EJECT_REQUEST
:
1543 /* request device eject */
1544 dbg("%s: Device eject notify on %s\n", __func__
, objname
);
1545 if ((bridge
->type
!= BRIDGE_TYPE_HOST
) &&
1546 (bridge
->flags
& BRIDGE_HAS_EJ0
)) {
1547 struct acpiphp_slot
*slot
;
1548 slot
= bridge
->func
->slot
;
1549 if (!acpiphp_disable_slot(slot
))
1550 acpiphp_eject_slot(slot
);
1554 case ACPI_NOTIFY_FREQUENCY_MISMATCH
:
1555 printk(KERN_ERR
"Device %s cannot be configured due"
1556 " to a frequency mismatch\n", objname
);
1559 case ACPI_NOTIFY_BUS_MODE_MISMATCH
:
1560 printk(KERN_ERR
"Device %s cannot be configured due"
1561 " to a bus mode mismatch\n", objname
);
1564 case ACPI_NOTIFY_POWER_FAULT
:
1565 printk(KERN_ERR
"Device %s has suffered a power fault\n",
1570 warn("notify_handler: unknown event type 0x%x for %s\n", type
, objname
);
1576 * handle_hotplug_event_func - handle ACPI event on functions (i.e. slots)
1577 * @handle: Notify()'ed acpi_handle
1578 * @type: Notify code
1579 * @context: pointer to acpiphp_func structure
1581 * Handles ACPI event notification on slots.
1583 static void handle_hotplug_event_func(acpi_handle handle
, u32 type
, void *context
)
1585 struct acpiphp_func
*func
;
1587 struct acpi_buffer buffer
= { .length
= sizeof(objname
),
1588 .pointer
= objname
};
1590 acpi_get_name(handle
, ACPI_FULL_PATHNAME
, &buffer
);
1592 func
= (struct acpiphp_func
*)context
;
1595 case ACPI_NOTIFY_BUS_CHECK
:
1596 /* bus re-enumerate */
1597 dbg("%s: Bus check notify on %s\n", __func__
, objname
);
1598 acpiphp_enable_slot(func
->slot
);
1601 case ACPI_NOTIFY_DEVICE_CHECK
:
1602 /* device check : re-enumerate from parent bus */
1603 dbg("%s: Device check notify on %s\n", __func__
, objname
);
1604 acpiphp_check_bridge(func
->slot
->bridge
);
1607 case ACPI_NOTIFY_DEVICE_WAKE
:
1609 dbg("%s: Device wake notify on %s\n", __func__
, objname
);
1612 case ACPI_NOTIFY_EJECT_REQUEST
:
1613 /* request device eject */
1614 dbg("%s: Device eject notify on %s\n", __func__
, objname
);
1615 if (!(acpiphp_disable_slot(func
->slot
)))
1616 acpiphp_eject_slot(func
->slot
);
1620 warn("notify_handler: unknown event type 0x%x for %s\n", type
, objname
);
1627 find_root_bridges(acpi_handle handle
, u32 lvl
, void *context
, void **rv
)
1629 int *count
= (int *)context
;
1631 if (acpi_root_bridge(handle
)) {
1632 acpi_install_notify_handler(handle
, ACPI_SYSTEM_NOTIFY
,
1633 handle_hotplug_event_bridge
, NULL
);
1639 static struct acpi_pci_driver acpi_pci_hp_driver
= {
1641 .remove
= remove_bridge
,
1645 * acpiphp_glue_init - initializes all PCI hotplug - ACPI glue data structures
1647 int __init
acpiphp_glue_init(void)
1651 acpi_walk_namespace(ACPI_TYPE_DEVICE
, ACPI_ROOT_OBJECT
,
1652 ACPI_UINT32_MAX
, find_root_bridges
, &num
, NULL
);
1657 acpi_pci_register_driver(&acpi_pci_hp_driver
);
1664 * acpiphp_glue_exit - terminates all PCI hotplug - ACPI glue data structures
1666 * This function frees all data allocated in acpiphp_glue_init().
1668 void acpiphp_glue_exit(void)
1670 acpi_pci_unregister_driver(&acpi_pci_hp_driver
);
1675 * acpiphp_get_num_slots - count number of slots in a system
1677 int __init
acpiphp_get_num_slots(void)
1679 struct acpiphp_bridge
*bridge
;
1682 list_for_each_entry (bridge
, &bridge_list
, list
) {
1683 dbg("Bus %04x:%02x has %d slot%s\n",
1684 pci_domain_nr(bridge
->pci_bus
),
1685 bridge
->pci_bus
->number
, bridge
->nr_slots
,
1686 bridge
->nr_slots
== 1 ? "" : "s");
1687 num_slots
+= bridge
->nr_slots
;
1690 dbg("Total %d slots\n", num_slots
);
1697 * acpiphp_for_each_slot - call function for each slot
1698 * @fn: callback function
1699 * @data: context to be passed to callback function
1701 static int acpiphp_for_each_slot(acpiphp_callback fn
, void *data
)
1703 struct list_head
*node
;
1704 struct acpiphp_bridge
*bridge
;
1705 struct acpiphp_slot
*slot
;
1708 list_for_each (node
, &bridge_list
) {
1709 bridge
= (struct acpiphp_bridge
*)node
;
1710 for (slot
= bridge
->slots
; slot
; slot
= slot
->next
) {
1711 retval
= fn(slot
, data
);
1724 * acpiphp_enable_slot - power on slot
1725 * @slot: ACPI PHP slot
1727 int acpiphp_enable_slot(struct acpiphp_slot
*slot
)
1731 mutex_lock(&slot
->crit_sect
);
1733 /* wake up all functions */
1734 retval
= power_on_slot(slot
);
1738 if (get_slot_status(slot
) == ACPI_STA_ALL
) {
1739 /* configure all functions */
1740 retval
= enable_device(slot
);
1742 power_off_slot(slot
);
1744 dbg("%s: Slot status is not ACPI_STA_ALL\n", __func__
);
1745 power_off_slot(slot
);
1749 mutex_unlock(&slot
->crit_sect
);
1754 * acpiphp_disable_slot - power off slot
1755 * @slot: ACPI PHP slot
1757 int acpiphp_disable_slot(struct acpiphp_slot
*slot
)
1761 mutex_lock(&slot
->crit_sect
);
1763 /* unconfigure all functions */
1764 retval
= disable_device(slot
);
1768 /* power off all functions */
1769 retval
= power_off_slot(slot
);
1774 mutex_unlock(&slot
->crit_sect
);
1783 u8
acpiphp_get_power_status(struct acpiphp_slot
*slot
)
1785 return (slot
->flags
& SLOT_POWEREDON
);
1793 u8
acpiphp_get_latch_status(struct acpiphp_slot
*slot
)
1797 sta
= get_slot_status(slot
);
1799 return (sta
& ACPI_STA_SHOW_IN_UI
) ? 0 : 1;
1804 * adapter presence : 1
1807 u8
acpiphp_get_adapter_status(struct acpiphp_slot
*slot
)
1811 sta
= get_slot_status(slot
);
1813 return (sta
== 0) ? 0 : 1;