[linux-2.6-block.git] / drivers / pci / pci-acpi.c

/*
 * File:	pci-acpi.c
 * Purpose:	Provide PCI support in ACPI
 *
 * Copyright (C) 2005 David Shaohua Li <shaohua.li@intel.com>
 * Copyright (C) 2004 Tom Long Nguyen <tom.l.nguyen@intel.com>
 * Copyright (C) 2004 Intel Corp.
 */

#include <linux/delay.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/pci-aspm.h>
#include <acpi/acpi.h>
#include <acpi/acpi_bus.h>

#include <linux/pci-acpi.h>
#include <linux/pm_runtime.h>
#include <linux/pm_qos.h>
#include "pci.h"

/**
 * pci_acpi_wake_bus - Wake-up notification handler for root buses.
 * @handle: ACPI handle of a device the notification is for.
 * @event: Type of the signaled event.
 * @context: PCI root bus to wake up devices on.
 */
static void pci_acpi_wake_bus(acpi_handle handle, u32 event, void *context)
{
	struct pci_bus *pci_bus = context;

	if (event == ACPI_NOTIFY_DEVICE_WAKE && pci_bus)
		pci_pme_wakeup_bus(pci_bus);
}

/**
 * pci_acpi_wake_dev - Wake-up notification handler for PCI devices.
 * @handle: ACPI handle of a device the notification is for.
 * @event: Type of the signaled event.
 * @context: PCI device object to wake up.
 */
static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context)
{
	struct pci_dev *pci_dev = context;

	if (event != ACPI_NOTIFY_DEVICE_WAKE || !pci_dev)
		return;

	if (pci_dev->current_state == PCI_D3cold) {
		pci_wakeup_event(pci_dev);
		pm_runtime_resume(&pci_dev->dev);
		return;
	}

	if (!pci_dev->pm_cap || !pci_dev->pme_support
	     || pci_check_pme_status(pci_dev)) {
		if (pci_dev->pme_poll)
			pci_dev->pme_poll = false;

		pci_wakeup_event(pci_dev);
		pm_runtime_resume(&pci_dev->dev);
	}

	if (pci_dev->subordinate)
		pci_pme_wakeup_bus(pci_dev->subordinate);
}

/**
 * pci_acpi_add_bus_pm_notifier - Register PM notifier for given PCI bus.
 * @dev: ACPI device to add the notifier for.
 * @pci_bus: PCI bus to walk checking for PME status if an event is signaled.
 */
acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev,
					 struct pci_bus *pci_bus)
{
	return acpi_add_pm_notifier(dev, pci_acpi_wake_bus, pci_bus);
}

/**
 * pci_acpi_remove_bus_pm_notifier - Unregister PCI bus PM notifier.
 * @dev: ACPI device to remove the notifier from.
 */
acpi_status pci_acpi_remove_bus_pm_notifier(struct acpi_device *dev)
{
	return acpi_remove_pm_notifier(dev, pci_acpi_wake_bus);
}

/**
 * pci_acpi_add_pm_notifier - Register PM notifier for given PCI device.
 * @dev: ACPI device to add the notifier for.
 * @pci_dev: PCI device to check for the PME status if an event is signaled.
 */
acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev,
				     struct pci_dev *pci_dev)
{
	return acpi_add_pm_notifier(dev, pci_acpi_wake_dev, pci_dev);
}

/**
 * pci_acpi_remove_pm_notifier - Unregister PCI device PM notifier.
 * @dev: ACPI device to remove the notifier from.
 */
acpi_status pci_acpi_remove_pm_notifier(struct acpi_device *dev)
{
	return acpi_remove_pm_notifier(dev, pci_acpi_wake_dev);
}

phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
{
	acpi_status status = AE_NOT_EXIST;
	unsigned long long mcfg_addr;

	if (handle)
		status = acpi_evaluate_integer(handle, METHOD_NAME__CBA,
					       NULL, &mcfg_addr);
	if (ACPI_FAILURE(status))
		return 0;

	return (phys_addr_t)mcfg_addr;
}

/*
 * _SxD returns the D-state with the highest power
 * (lowest D-state number) supported in the S-state "x".
 *
 * If the devices does not have a _PRW
 * (Power Resources for Wake) supporting system wakeup from "x"
 * then the OS is free to choose a lower power (higher number
 * D-state) than the return value from _SxD.
 *
 * But if _PRW is enabled at S-state "x", the OS
 * must not choose a power lower than _SxD --
 * unless the device has an _SxW method specifying
 * the lowest power (highest D-state number) the device
 * may enter while still able to wake the system.
 *
 * ie. depending on global OS policy:
 *
 * if (_PRW at S-state x)
 *	choose from highest power _SxD to lowest power _SxW
 * else // no _PRW at S-state x
 * 	choose highest power _SxD or any lower power
 */

static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
{
	int acpi_state, d_max;

	if (pdev->no_d3cold)
		d_max = ACPI_STATE_D3_HOT;
	else
		d_max = ACPI_STATE_D3_COLD;
	acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL, d_max);
	if (acpi_state < 0)
		return PCI_POWER_ERROR;

	switch (acpi_state) {
	case ACPI_STATE_D0:
		return PCI_D0;
	case ACPI_STATE_D1:
		return PCI_D1;
	case ACPI_STATE_D2:
		return PCI_D2;
	case ACPI_STATE_D3_HOT:
		return PCI_D3hot;
	case ACPI_STATE_D3_COLD:
		return PCI_D3cold;
	}
	return PCI_POWER_ERROR;
}

static bool acpi_pci_power_manageable(struct pci_dev *dev)
{
	acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);

	return handle ? acpi_bus_power_manageable(handle) : false;
}

static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
{
	acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
	acpi_handle tmp;
	static const u8 state_conv[] = {
		[PCI_D0] = ACPI_STATE_D0,
		[PCI_D1] = ACPI_STATE_D1,
		[PCI_D2] = ACPI_STATE_D2,
		[PCI_D3hot] = ACPI_STATE_D3,
		[PCI_D3cold] = ACPI_STATE_D3
	};
	int error = -EINVAL;

	/* If the ACPI device has _EJ0, ignore the device */
	if (!handle || ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
		return -ENODEV;

	switch (state) {
	case PCI_D3cold:
		if (dev_pm_qos_flags(&dev->dev, PM_QOS_FLAG_NO_POWER_OFF) ==
				PM_QOS_FLAGS_ALL) {
			error = -EBUSY;
			break;
		}
	case PCI_D0:
	case PCI_D1:
	case PCI_D2:
	case PCI_D3hot:
		error = acpi_bus_set_power(handle, state_conv[state]);
	}

	if (!error)
		dev_info(&dev->dev, "power state changed by ACPI to %s\n",
			 pci_power_name(state));

	return error;
}

static bool acpi_pci_can_wakeup(struct pci_dev *dev)
{
	acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);

	return handle ? acpi_bus_can_wakeup(handle) : false;
}

static void acpi_pci_propagate_wakeup_enable(struct pci_bus *bus, bool enable)
{
	while (bus->parent) {
		if (!acpi_pm_device_sleep_wake(&bus->self->dev, enable))
			return;
		bus = bus->parent;
	}

	/* We have reached the root bus. */
	if (bus->bridge)
		acpi_pm_device_sleep_wake(bus->bridge, enable);
}

static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
{
	if (acpi_pci_can_wakeup(dev))
		return acpi_pm_device_sleep_wake(&dev->dev, enable);

	acpi_pci_propagate_wakeup_enable(dev->bus, enable);
	return 0;
}

static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable)
{
	while (bus->parent) {
		struct pci_dev *bridge = bus->self;

		if (bridge->pme_interrupt)
			return;
		if (!acpi_pm_device_run_wake(&bridge->dev, enable))
			return;
		bus = bus->parent;
	}

	/* We have reached the root bus. */
	if (bus->bridge)
		acpi_pm_device_run_wake(bus->bridge, enable);
}

static int acpi_pci_run_wake(struct pci_dev *dev, bool enable)
{
	/*
	 * Per PCI Express Base Specification Revision 2.0 section
	 * 5.3.3.2 Link Wakeup, platform support is needed for D3cold
	 * waking up to power on the main link even if there is PME
	 * support for D3cold
	 */
	if (dev->pme_interrupt && !dev->runtime_d3cold)
		return 0;

	if (!acpi_pm_device_run_wake(&dev->dev, enable))
		return 0;

	acpi_pci_propagate_run_wake(dev->bus, enable);
	return 0;
}

static struct pci_platform_pm_ops acpi_pci_platform_pm = {
	.is_manageable = acpi_pci_power_manageable,
	.set_state = acpi_pci_set_power_state,
	.choose_state = acpi_pci_choose_state,
	.sleep_wake = acpi_pci_sleep_wake,
	.run_wake = acpi_pci_run_wake,
};

/* ACPI bus type */
static int acpi_pci_find_device(struct device *dev, acpi_handle *handle)
{
	struct pci_dev * pci_dev;
	u64	addr;

	pci_dev = to_pci_dev(dev);
	/* Please ref to ACPI spec for the syntax of _ADR */
	addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn);
	*handle = acpi_get_child(DEVICE_ACPI_HANDLE(dev->parent), addr);
	if (!*handle)
		return -ENODEV;
	return 0;
}

static void pci_acpi_setup(struct device *dev)
{
	struct pci_dev *pci_dev = to_pci_dev(dev);
	acpi_handle handle = ACPI_HANDLE(dev);
	struct acpi_device *adev;

	if (acpi_bus_get_device(handle, &adev) || !adev->wakeup.flags.valid)
		return;

	device_set_wakeup_capable(dev, true);
	acpi_pci_sleep_wake(pci_dev, false);

	pci_acpi_add_pm_notifier(adev, pci_dev);
	if (adev->wakeup.flags.run_wake)
		device_set_run_wake(dev, true);
}

static void pci_acpi_cleanup(struct device *dev)
{
	acpi_handle handle = ACPI_HANDLE(dev);
	struct acpi_device *adev;

	if (!acpi_bus_get_device(handle, &adev) && adev->wakeup.flags.valid) {
		device_set_wakeup_capable(dev, false);
		device_set_run_wake(dev, false);
		pci_acpi_remove_pm_notifier(adev);
	}
}

static bool pci_acpi_bus_match(struct device *dev)
{
	return dev->bus == &pci_bus_type;
}

static struct acpi_bus_type acpi_pci_bus = {
	.name = "PCI",
	.match = pci_acpi_bus_match,
	.find_device = acpi_pci_find_device,
	.setup = pci_acpi_setup,
	.cleanup = pci_acpi_cleanup,
};

static int __init acpi_pci_init(void)
{
	int ret;

	if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_MSI) {
		printk(KERN_INFO"ACPI FADT declares the system doesn't support MSI, so disable it\n");
		pci_no_msi();
	}

	if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
		printk(KERN_INFO"ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n");
		pcie_no_aspm();
	}

	ret = register_acpi_bus_type(&acpi_pci_bus);
	if (ret)
		return 0;
	pci_set_platform_pm(&acpi_pci_platform_pm);
	return 0;
}
arch_initcall(acpi_pci_init);
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* File: pci-acpi.c
a406d9e6	3	* Purpose: Provide PCI support in ACPI
1da177e4	4	*
84df749f DSL	5	* Copyright (C) 2005 David Shaohua Li <shaohua.li@intel.com>
	6	* Copyright (C) 2004 Tom Long Nguyen <tom.l.nguyen@intel.com>
	7	* Copyright (C) 2004 Intel Corp.
1da177e4 LT	8	*/
	9
	10	#include <linux/delay.h>
	11	#include <linux/init.h>
	12	#include <linux/pci.h>
	13	#include <linux/module.h>
5fde244d	14	#include <linux/pci-aspm.h>
1da177e4	15	#include <acpi/acpi.h>
1da177e4 LT	16	#include <acpi/acpi_bus.h>
	17
	18	#include <linux/pci-acpi.h>
b67ea761	19	#include <linux/pm_runtime.h>
8b713a88	20	#include <linux/pm_qos.h>
0f64474b	21	#include "pci.h"
1da177e4	22
b67ea761 RW	23	/**
	24	* pci_acpi_wake_bus - Wake-up notification handler for root buses.
	25	* @handle: ACPI handle of a device the notification is for.
	26	* @event: Type of the signaled event.
	27	* @context: PCI root bus to wake up devices on.
	28	*/
	29	static void pci_acpi_wake_bus(acpi_handle handle, u32 event, void *context)
	30	{
	31	struct pci_bus *pci_bus = context;
	32
	33	if (event == ACPI_NOTIFY_DEVICE_WAKE && pci_bus)
	34	pci_pme_wakeup_bus(pci_bus);
	35	}
	36
	37	/**
	38	* pci_acpi_wake_dev - Wake-up notification handler for PCI devices.
	39	* @handle: ACPI handle of a device the notification is for.
	40	* @event: Type of the signaled event.
	41	* @context: PCI device object to wake up.
	42	*/
	43	static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context)
	44	{
	45	struct pci_dev *pci_dev = context;
	46
a424948d RW	47	if (event != ACPI_NOTIFY_DEVICE_WAKE \|\| !pci_dev)
	48	return;
	49
448bd857 HY	50	if (pci_dev->current_state == PCI_D3cold) {
	51	pci_wakeup_event(pci_dev);
	52	pm_runtime_resume(&pci_dev->dev);
	53	return;
	54	}
	55
a424948d RW	56	if (!pci_dev->pm_cap \|\| !pci_dev->pme_support
a424948d RW	57	\|\| pci_check_pme_status(pci_dev)) {
379021d5 RW	58	if (pci_dev->pme_poll)
	59	pci_dev->pme_poll = false;
	60
0f953bf6	61	pci_wakeup_event(pci_dev);
b67ea761	62	pm_runtime_resume(&pci_dev->dev);
b67ea761	63	}
a424948d RW	64
	65	if (pci_dev->subordinate)
	66	pci_pme_wakeup_bus(pci_dev->subordinate);
b67ea761 RW	67	}
b67ea761 RW	68
b67ea761 RW	69	/**
	70	* pci_acpi_add_bus_pm_notifier - Register PM notifier for given PCI bus.
	71	* @dev: ACPI device to add the notifier for.
	72	* @pci_bus: PCI bus to walk checking for PME status if an event is signaled.
	73	*/
	74	acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev,
	75	struct pci_bus *pci_bus)
	76	{
ec2cd81c	77	return acpi_add_pm_notifier(dev, pci_acpi_wake_bus, pci_bus);
b67ea761 RW	78	}
	79
	80	/**
	81	* pci_acpi_remove_bus_pm_notifier - Unregister PCI bus PM notifier.
	82	* @dev: ACPI device to remove the notifier from.
	83	*/
	84	acpi_status pci_acpi_remove_bus_pm_notifier(struct acpi_device *dev)
	85	{
ec2cd81c	86	return acpi_remove_pm_notifier(dev, pci_acpi_wake_bus);
b67ea761 RW	87	}
	88
	89	/**
	90	* pci_acpi_add_pm_notifier - Register PM notifier for given PCI device.
	91	* @dev: ACPI device to add the notifier for.
	92	* @pci_dev: PCI device to check for the PME status if an event is signaled.
	93	*/
	94	acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev,
	95	struct pci_dev *pci_dev)
	96	{
ec2cd81c	97	return acpi_add_pm_notifier(dev, pci_acpi_wake_dev, pci_dev);
b67ea761 RW	98	}
	99
	100	/**
	101	* pci_acpi_remove_pm_notifier - Unregister PCI device PM notifier.
	102	* @dev: ACPI device to remove the notifier from.
	103	*/
	104	acpi_status pci_acpi_remove_pm_notifier(struct acpi_device *dev)
	105	{
ec2cd81c	106	return acpi_remove_pm_notifier(dev, pci_acpi_wake_dev);
b67ea761 RW	107	}
b67ea761 RW	108
f4b57a3b JL	109	phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
	110	{
	111	acpi_status status = AE_NOT_EXIST;
	112	unsigned long long mcfg_addr;
	113
	114	if (handle)
	115	status = acpi_evaluate_integer(handle, METHOD_NAME__CBA,
	116	NULL, &mcfg_addr);
	117	if (ACPI_FAILURE(status))
	118	return 0;
	119
	120	return (phys_addr_t)mcfg_addr;
	121	}
	122
0f64474b DSL	123	/*
	124	* _SxD returns the D-state with the highest power
	125	* (lowest D-state number) supported in the S-state "x".
	126	*
	127	* If the devices does not have a _PRW
	128	* (Power Resources for Wake) supporting system wakeup from "x"
	129	* then the OS is free to choose a lower power (higher number
	130	* D-state) than the return value from _SxD.
	131	*
	132	* But if _PRW is enabled at S-state "x", the OS
	133	* must not choose a power lower than _SxD --
	134	* unless the device has an _SxW method specifying
	135	* the lowest power (highest D-state number) the device
	136	* may enter while still able to wake the system.
	137	*
	138	* ie. depending on global OS policy:
	139	*
	140	* if (_PRW at S-state x)
	141	* choose from highest power _SxD to lowest power _SxW
	142	* else // no _PRW at S-state x
	143	* choose highest power _SxD or any lower power
0f64474b DSL	144	*/
0f64474b DSL	145
8d2bdf49	146	static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
0f64474b	147	{
448bd857	148	int acpi_state, d_max;
0f64474b	149
448bd857 HY	150	if (pdev->no_d3cold)
	151	d_max = ACPI_STATE_D3_HOT;
	152	else
	153	d_max = ACPI_STATE_D3_COLD;
	154	acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL, d_max);
ab826ca4 SL	155	if (acpi_state < 0)
	156	return PCI_POWER_ERROR;
	157
	158	switch (acpi_state) {
	159	case ACPI_STATE_D0:
	160	return PCI_D0;
	161	case ACPI_STATE_D1:
	162	return PCI_D1;
	163	case ACPI_STATE_D2:
	164	return PCI_D2;
1cc0c998	165	case ACPI_STATE_D3_HOT:
ab826ca4	166	return PCI_D3hot;
28c2103d LM	167	case ACPI_STATE_D3_COLD:
28c2103d LM	168	return PCI_D3cold;
ab826ca4 SL	169	}
ab826ca4 SL	170	return PCI_POWER_ERROR;
0f64474b	171	}
961d9120 RW	172
	173	static bool acpi_pci_power_manageable(struct pci_dev *dev)
	174	{
	175	acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
	176
	177	return handle ? acpi_bus_power_manageable(handle) : false;
	178	}
0f64474b	179
b913100d DSL	180	static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
	181	{
	182	acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
10b3dcae	183	acpi_handle tmp;
583c377f DB	184	static const u8 state_conv[] = {
	185	[PCI_D0] = ACPI_STATE_D0,
	186	[PCI_D1] = ACPI_STATE_D1,
	187	[PCI_D2] = ACPI_STATE_D2,
5c7dd710	188	[PCI_D3hot] = ACPI_STATE_D3,
583c377f	189	[PCI_D3cold] = ACPI_STATE_D3
b913100d	190	};
44e4e66e	191	int error = -EINVAL;
b913100d	192
10b3dcae	193	/* If the ACPI device has _EJ0, ignore the device */
44e4e66e RW	194	if (!handle \|\| ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
44e4e66e RW	195	return -ENODEV;
583c377f DB	196
583c377f DB	197	switch (state) {
8b713a88 RW	198	case PCI_D3cold:
	199	if (dev_pm_qos_flags(&dev->dev, PM_QOS_FLAG_NO_POWER_OFF) ==
	200	PM_QOS_FLAGS_ALL) {
	201	error = -EBUSY;
	202	break;
	203	}
583c377f DB	204	case PCI_D0:
	205	case PCI_D1:
	206	case PCI_D2:
	207	case PCI_D3hot:
44e4e66e	208	error = acpi_bus_set_power(handle, state_conv[state]);
583c377f	209	}
44e4e66e RW	210
44e4e66e RW	211	if (!error)
3d0882c0 RW	212	dev_info(&dev->dev, "power state changed by ACPI to %s\n",
3d0882c0 RW	213	pci_power_name(state));
44e4e66e RW	214
44e4e66e RW	215	return error;
b913100d DSL	216	}
b913100d DSL	217
eb9d0fe4 RW	218	static bool acpi_pci_can_wakeup(struct pci_dev *dev)
	219	{
	220	acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
	221
	222	return handle ? acpi_bus_can_wakeup(handle) : false;
	223	}
	224
0baed8da RW	225	static void acpi_pci_propagate_wakeup_enable(struct pci_bus *bus, bool enable)
	226	{
	227	while (bus->parent) {
dc1a94ae	228	if (!acpi_pm_device_sleep_wake(&bus->self->dev, enable))
0baed8da RW	229	return;
	230	bus = bus->parent;
	231	}
	232
	233	/* We have reached the root bus. */
	234	if (bus->bridge)
	235	acpi_pm_device_sleep_wake(bus->bridge, enable);
	236	}
	237
eb9d0fe4 RW	238	static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
eb9d0fe4 RW	239	{
0baed8da RW	240	if (acpi_pci_can_wakeup(dev))
	241	return acpi_pm_device_sleep_wake(&dev->dev, enable);
	242
dc1a94ae	243	acpi_pci_propagate_wakeup_enable(dev->bus, enable);
0baed8da	244	return 0;
eb9d0fe4 RW	245	}
eb9d0fe4 RW	246
b67ea761 RW	247	static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable)
	248	{
	249	while (bus->parent) {
	250	struct pci_dev *bridge = bus->self;
	251
	252	if (bridge->pme_interrupt)
	253	return;
b24e5098	254	if (!acpi_pm_device_run_wake(&bridge->dev, enable))
b67ea761 RW	255	return;
	256	bus = bus->parent;
	257	}
	258
	259	/* We have reached the root bus. */
	260	if (bus->bridge)
b24e5098	261	acpi_pm_device_run_wake(bus->bridge, enable);
b67ea761 RW	262	}
	263
	264	static int acpi_pci_run_wake(struct pci_dev *dev, bool enable)
	265	{
448bd857 HY	266	/*
	267	* Per PCI Express Base Specification Revision 2.0 section
	268	* 5.3.3.2 Link Wakeup, platform support is needed for D3cold
	269	* waking up to power on the main link even if there is PME
	270	* support for D3cold
	271	*/
	272	if (dev->pme_interrupt && !dev->runtime_d3cold)
b67ea761 RW	273	return 0;
b67ea761 RW	274
b24e5098	275	if (!acpi_pm_device_run_wake(&dev->dev, enable))
b67ea761 RW	276	return 0;
	277
	278	acpi_pci_propagate_run_wake(dev->bus, enable);
	279	return 0;
	280	}
	281
961d9120 RW	282	static struct pci_platform_pm_ops acpi_pci_platform_pm = {
	283	.is_manageable = acpi_pci_power_manageable,
	284	.set_state = acpi_pci_set_power_state,
	285	.choose_state = acpi_pci_choose_state,
eb9d0fe4	286	.sleep_wake = acpi_pci_sleep_wake,
b67ea761	287	.run_wake = acpi_pci_run_wake,
961d9120	288	};
b913100d	289
84df749f	290	/* ACPI bus type */
9c273b95	291	static int acpi_pci_find_device(struct device dev, acpi_handle handle)
84df749f DSL	292	{
84df749f DSL	293	struct pci_dev * pci_dev;
439913ff	294	u64 addr;
84df749f DSL	295
	296	pci_dev = to_pci_dev(dev);
	297	/* Please ref to ACPI spec for the syntax of _ADR */
	298	addr = (PCI_SLOT(pci_dev->devfn) << 16) \| PCI_FUNC(pci_dev->devfn);
	299	*handle = acpi_get_child(DEVICE_ACPI_HANDLE(dev->parent), addr);
	300	if (!*handle)
	301	return -ENODEV;
	302	return 0;
	303	}
	304
38a9a67a	305	static void pci_acpi_setup(struct device *dev)
d2e5f0c1	306	{
d2e5f0c1	307	struct pci_dev *pci_dev = to_pci_dev(dev);
38a9a67a RW	308	acpi_handle handle = ACPI_HANDLE(dev);
38a9a67a RW	309	struct acpi_device *adev;
38a9a67a	310
38a9a67a	311	if (acpi_bus_get_device(handle, &adev) \|\| !adev->wakeup.flags.valid)
d2e5f0c1 RW	312	return;
	313
	314	device_set_wakeup_capable(dev, true);
	315	acpi_pci_sleep_wake(pci_dev, false);
	316
	317	pci_acpi_add_pm_notifier(adev, pci_dev);
	318	if (adev->wakeup.flags.run_wake)
	319	device_set_run_wake(dev, true);
	320	}
	321
38a9a67a	322	static void pci_acpi_cleanup(struct device *dev)
d2e5f0c1	323	{
38a9a67a RW	324	acpi_handle handle = ACPI_HANDLE(dev);
38a9a67a RW	325	struct acpi_device *adev;
d2e5f0c1	326
38a9a67a	327	if (!acpi_bus_get_device(handle, &adev) && adev->wakeup.flags.valid) {
d2e5f0c1 RW	328	device_set_wakeup_capable(dev, false);
	329	device_set_run_wake(dev, false);
	330	pci_acpi_remove_pm_notifier(adev);
	331	}
	332	}
	333
53540098 RW	334	static bool pci_acpi_bus_match(struct device *dev)
	335	{
	336	return dev->bus == &pci_bus_type;
	337	}
	338
9c273b95	339	static struct acpi_bus_type acpi_pci_bus = {
53540098 RW	340	.name = "PCI",
53540098 RW	341	.match = pci_acpi_bus_match,
9c273b95	342	.find_device = acpi_pci_find_device,
38a9a67a RW	343	.setup = pci_acpi_setup,
38a9a67a RW	344	.cleanup = pci_acpi_cleanup,
84df749f DSL	345	};
84df749f DSL	346
9c273b95	347	static int __init acpi_pci_init(void)
84df749f DSL	348	{
	349	int ret;
	350
993958fe	351	if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_MSI) {
f8993aff SL	352	printk(KERN_INFO"ACPI FADT declares the system doesn't support MSI, so disable it\n");
	353	pci_no_msi();
	354	}
5fde244d	355
993958fe	356	if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
5fde244d SL	357	printk(KERN_INFO"ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n");
	358	pcie_no_aspm();
	359	}
	360
9c273b95	361	ret = register_acpi_bus_type(&acpi_pci_bus);
84df749f DSL	362	if (ret)
84df749f DSL	363	return 0;
961d9120	364	pci_set_platform_pm(&acpi_pci_platform_pm);
84df749f DSL	365	return 0;
84df749f DSL	366	}
9c273b95	367	arch_initcall(acpi_pci_init);