[dragonfly.git] / sys / dev / acpica5 / acpi_pci.c

/*-
 * Copyright (c) 1997, Stefan Esser <se@kfreebsd.org>
 * Copyright (c) 2000, Michael Smith <msmith@kfreebsd.org>
 * Copyright (c) 2000, BSDi
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/dev/acpica/acpi_pci.c,v 1.31.2.1.6.1 2009/04/15 03:14:26 kensmith Exp $
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>

#include "acpi.h"
#include "acpivar.h"

#include <sys/pciio.h>
#include <bus/pci/pcireg.h>
#include <bus/pci/pcivar.h>
#include <bus/pci/pci_private.h>

#include "pcib_if.h"
#include "pci_if.h"

/* Hooks for the ACPI CA debugging infrastructure. */
#define _COMPONENT	ACPI_BUS
ACPI_MODULE_NAME("PCI")

struct acpi_pci_devinfo {
	struct pci_devinfo	ap_dinfo;
	ACPI_HANDLE		ap_handle;
	int			ap_flags;
};

ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods");

/* Be sure that ACPI and PCI power states are equivalent. */
CTASSERT(ACPI_STATE_D0 == PCI_POWERSTATE_D0);
CTASSERT(ACPI_STATE_D1 == PCI_POWERSTATE_D1);
CTASSERT(ACPI_STATE_D2 == PCI_POWERSTATE_D2);
CTASSERT(ACPI_STATE_D3 == PCI_POWERSTATE_D3);

static int	acpi_pci_attach(device_t dev);
static int	acpi_pci_suspend(device_t dev);
static int	acpi_pci_resume(device_t dev);
static int	acpi_pci_child_location_str_method(device_t cbdev,
		    device_t child, char *buf, size_t buflen);
static int	acpi_pci_probe(device_t dev);
static int	acpi_pci_read_ivar(device_t dev, device_t child, int which,
		    uintptr_t *result);
static int	acpi_pci_write_ivar(device_t dev, device_t child, int which,
		    uintptr_t value);
static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
		    void *context, void **status);
static int	acpi_pci_set_powerstate_method(device_t dev, device_t child,
		    int state);
static void	acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child);

static device_method_t acpi_pci_methods[] = {
	/* Device interface */
	DEVMETHOD(device_probe,		acpi_pci_probe),
	DEVMETHOD(device_attach,	acpi_pci_attach),
	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
	DEVMETHOD(device_suspend,	acpi_pci_suspend),
	DEVMETHOD(device_resume,	acpi_pci_resume),

	/* Bus interface */
	DEVMETHOD(bus_print_child,	pci_print_child),
	DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
	DEVMETHOD(bus_set_resource,	bus_generic_rl_set_resource),
	DEVMETHOD(bus_get_resource,	bus_generic_rl_get_resource),
	DEVMETHOD(bus_delete_resource,	pci_delete_resource),
	DEVMETHOD(bus_alloc_resource,	pci_alloc_resource),
	DEVMETHOD(bus_release_resource,	bus_generic_rl_release_resource),
	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
	DEVMETHOD(bus_read_ivar,	acpi_pci_read_ivar),
	DEVMETHOD(bus_write_ivar,	acpi_pci_write_ivar),
	DEVMETHOD(bus_driver_added,	bus_generic_driver_added),
	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
	DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),

	/* PCI interface */
	DEVMETHOD(pci_read_config,	pci_read_config_method),
	DEVMETHOD(pci_write_config,	pci_write_config_method),
	DEVMETHOD(pci_enable_busmaster,	pci_enable_busmaster_method),
	DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
	DEVMETHOD(pci_enable_io,	pci_enable_io_method),
	DEVMETHOD(pci_disable_io,	pci_disable_io_method),
	DEVMETHOD(pci_get_powerstate,	pci_get_powerstate_method),
	DEVMETHOD(pci_set_powerstate,	acpi_pci_set_powerstate_method),
	DEVMETHOD(pci_assign_interrupt,	pci_assign_interrupt_method),

	{ 0, 0 }
};

static driver_t acpi_pci_driver = {
	"pci",
	acpi_pci_methods,
	0,	/* no softc */
};

static devclass_t pci_devclass;

DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
MODULE_VERSION(acpi_pci, 1);

static int
acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
    struct acpi_pci_devinfo *dinfo;

    dinfo = device_get_ivars(child);
    switch (which) {
    case ACPI_IVAR_HANDLE:
	*result = (uintptr_t)dinfo->ap_handle;
	return (0);
    case ACPI_IVAR_FLAGS:
	*result = (uintptr_t)dinfo->ap_flags;
	return (0);
    }
    return (pci_read_ivar(dev, child, which, result));
}

static int
acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
    struct acpi_pci_devinfo *dinfo;

    dinfo = device_get_ivars(child);
    switch (which) {
    case ACPI_IVAR_HANDLE:
	dinfo->ap_handle = (ACPI_HANDLE)value;
	return (0);
    case ACPI_IVAR_FLAGS:
	dinfo->ap_flags = (int)value;
	return (0);
    }
    return (pci_write_ivar(dev, child, which, value));
}

static int
acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
    size_t buflen)
{
    struct acpi_pci_devinfo *dinfo = device_get_ivars(child);

    pci_child_location_str_method(cbdev, child, buf, buflen);

    if (dinfo->ap_handle) {
	strlcat(buf, " handle=", buflen);
	strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
    }
    return (0);
}

/*
 * PCI power manangement
 */
static int
acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
{
	ACPI_HANDLE h;
	ACPI_STATUS status;
	int old_state, error;

	error = 0;
	if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
		return (EINVAL);

	/*
	 * We set the state using PCI Power Management outside of setting
	 * the ACPI state.  This means that when powering down a device, we
	 * first shut it down using PCI, and then using ACPI, which lets ACPI
	 * try to power down any Power Resources that are now no longer used.
	 * When powering up a device, we let ACPI set the state first so that
	 * it can enable any needed Power Resources before changing the PCI
	 * power state.
	 */
	ACPI_SERIAL_BEGIN(pci_powerstate);
	old_state = pci_get_powerstate(child);
	if (old_state < state) {
		error = pci_set_powerstate_method(dev, child, state);
		if (error)
			goto out;
	}
	h = acpi_get_handle(child);
	status = acpi_pwr_switch_consumer(h, state);
	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
		device_printf(dev,
		    "Failed to set ACPI power state D%d on %s: %s\n",
		    state, acpi_name(h), AcpiFormatException(status));
	if (old_state > state)
		error = pci_set_powerstate_method(dev, child, state);

out:
	ACPI_SERIAL_END(pci_powerstate);
	return (error);
}

static void
acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child)
{
	ACPI_STATUS status;
	device_t child;

	/*
	 * Lookup and remove the unused device that acpi0 creates when it walks
	 * the namespace creating devices.
	 */
	child = acpi_get_device(handle);
	if (child != NULL) {
		if (device_is_alive(child)) {
			/*
			 * The TabletPC TC1000 has a second PCI-ISA bridge
			 * that has a _HID for an acpi_sysresource device.
			 * In that case, leave ACPI-CA's device data pointing
			 * at the ACPI-enumerated device.
			 */
			device_printf(child,
			    "Conflicts with PCI device %d:%d:%d\n",
			    pci_get_bus(pci_child), pci_get_slot(pci_child),
			    pci_get_function(pci_child));
			return;
		}
		KASSERT(device_get_parent(child) ==
		    devclass_get_device(devclass_find("acpi"), 0),
		    ("%s: child (%s)'s parent is not acpi0", __func__,
		    acpi_name(handle)));
		device_delete_child(device_get_parent(child), child);
	}

	/*
	 * Update ACPI-CA to use the PCI enumerated device_t for this handle.
	 */
	status = AcpiDetachData(handle, acpi_fake_objhandler);
	if (ACPI_FAILURE(status))
		kprintf("WARNING: Unable to detach object data from %s - %s\n",
		    acpi_name(handle), AcpiFormatException(status));
	status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child);
	if (ACPI_FAILURE(status))
		kprintf("WARNING: Unable to attach object data to %s - %s\n",
		    acpi_name(handle), AcpiFormatException(status));
}

static ACPI_STATUS
acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
    void **status)
{
	struct acpi_pci_devinfo *dinfo;
	device_t *devlist;
	int devcount, i, func, slot;
	UINT32 address;

	ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);

	if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
		return_ACPI_STATUS (AE_OK);
	slot = ACPI_ADR_PCI_SLOT(address);
	func = ACPI_ADR_PCI_FUNC(address);
	if (device_get_children((device_t)context, &devlist, &devcount) != 0)
		return_ACPI_STATUS (AE_OK);
	for (i = 0; i < devcount; i++) {
		dinfo = device_get_ivars(devlist[i]);
		if (dinfo->ap_dinfo.cfg.func == func &&
		    dinfo->ap_dinfo.cfg.slot == slot) {
			dinfo->ap_handle = handle;
			acpi_pci_update_device(handle, devlist[i]);
			break;
		}
	}
	kfree(devlist, M_TEMP);
	return_ACPI_STATUS (AE_OK);
}

static int
acpi_pci_probe(device_t dev)
{

	if (pcib_get_bus(dev) < 0)
		return (ENXIO);
	if (acpi_get_handle(dev) == NULL)
		return (ENXIO);
	device_set_desc(dev, "ACPI PCI bus");
	return (0);
}

static int
acpi_pci_attach(device_t dev)
{
	int busno, domain;

	/*
	 * Since there can be multiple independantly numbered PCI
	 * busses on systems with multiple PCI domains, we can't use
	 * the unit number to decide which bus we are probing. We ask
	 * the parent pcib what our domain and bus numbers are.
	 */
	busno = pcib_get_bus(dev);
	domain = pcib_get_domain(dev);
	if (bootverbose) {
		device_printf(dev, "domain=%d, physical bus=%d\n",
		    domain, busno);
	}

	ACPI_SERIAL_INIT(pci_powerstate);

	/*
	 * First, PCI devices are added as in the normal PCI bus driver.
	 * Afterwards, the ACPI namespace under the bridge driver is
	 * walked to save ACPI handles to all the devices that appear in
	 * the ACPI namespace as immediate descendants of the bridge.
	 *
	 * XXX: Sometimes PCI devices show up in the ACPI namespace that
	 * pci_add_children() doesn't find.  We currently just ignore
	 * these devices.
	 */
	pci_add_children(dev, domain, busno, sizeof(struct acpi_pci_devinfo));
	AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
	    NULL, acpi_pci_save_handle, dev, NULL);

	return (bus_generic_attach(dev));
}

int
acpi_pci_suspend(device_t dev)
{
	int dstate, error, i, numdevs;
	device_t acpi_dev, child, *devlist;
	struct pci_devinfo *dinfo;

	acpi_dev = devclass_get_device(devclass_find("acpi"), 0);
	device_get_children(dev, &devlist, &numdevs);

	/*
	 * Save the PCI configuration space for each child and set the
	 * device in the appropriate power state for this sleep state.
	 */
	for (i = 0; i < numdevs; i++) {
		child = devlist[i];
		dinfo = (struct pci_devinfo *)device_get_ivars(child);
		pci_cfg_save(child, dinfo, 0);
	}

	/*
	 * Suspend devices before potentially powering them down.
	 */
	error = bus_generic_suspend(dev);
	if (error) {
		kfree(devlist, M_TEMP);
		return (error);
	}

	/*
	 * Always set the device to D3.  If ACPI suggests a different
	 * power state, use it instead.  If ACPI is not present, the
	 * firmware is responsible for managing device power.  Skip
	 * children who aren't attached since they are powered down
	 * separately.  Only manage type 0 devices for now.
	 */
	for (i = 0; acpi_dev && i < numdevs; i++) {
		child = devlist[i];
		dinfo = (struct pci_devinfo *)device_get_ivars(child);
		if (device_is_attached(child) && dinfo->cfg.hdrtype == 0) {
			dstate = PCI_POWERSTATE_D3;
			ACPI_PWR_FOR_SLEEP(acpi_dev, child, &dstate);
			pci_set_powerstate(child, dstate);
		}
	}

	kfree(devlist, M_TEMP);
	return (0);
}

int
acpi_pci_resume(device_t dev)
{
	int i, numdevs;
	device_t acpi_dev, child, *devlist;
	struct pci_devinfo *dinfo;

	acpi_dev = devclass_get_device(devclass_find("acpi"), 0);
	device_get_children(dev, &devlist, &numdevs);

	/*
	 * Set each child to D0 and restore its PCI configuration space.
	 */
	for (i = 0; i < numdevs; i++) {
		/*
		 * Notify ACPI we're going to D0 but ignore the result.  If
		 * ACPI is not present, the firmware is responsible for
		 * managing device power.  Only manage type 0 devices for now.
		 */
		child = devlist[i];
		dinfo = (struct pci_devinfo *) device_get_ivars(child);
		if (acpi_dev && device_is_attached(child) &&
		    dinfo->cfg.hdrtype == 0) {
			ACPI_PWR_FOR_SLEEP(acpi_dev, child, NULL);
			pci_set_powerstate(child, PCI_POWERSTATE_D0);
		}

		/*
		 * Now the device is powered up, restore its config space.
		 */
		pci_cfg_restore(child, dinfo);
	}

	kfree(devlist, M_TEMP);
	return (bus_generic_resume(dev));
}
Commit	Line	Data
10f97674 AP	1	/*-
	2	* Copyright (c) 1997, Stefan Esser <se@kfreebsd.org>
	3	* Copyright (c) 2000, Michael Smith <msmith@kfreebsd.org>
5ed44076 MD	4	* Copyright (c) 2000, BSDi
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice unmodified, this list of conditions, and the following
	12	* disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32af04f7 SW	27	*
32af04f7 SW	28	* $FreeBSD: src/sys/dev/acpica/acpi_pci.c,v 1.31.2.1.6.1 2009/04/15 03:14:26 kensmith Exp $
5ed44076 MD	29	*/
5ed44076 MD	30
5ed44076 MD	31	#include <sys/param.h>
	32	#include <sys/systm.h>
	33	#include <sys/bus.h>
	34	#include <sys/kernel.h>
	35	#include <sys/malloc.h>
	36	#include <sys/module.h>
	37
	38	#include "acpi.h"
5ed44076 MD	39	#include "acpivar.h"
	40
	41	#include <sys/pciio.h>
	42	#include <bus/pci/pcireg.h>
	43	#include <bus/pci/pcivar.h>
	44	#include <bus/pci/pci_private.h>
	45
	46	#include "pcib_if.h"
	47	#include "pci_if.h"
	48
49e48b8a	49	/* Hooks for the ACPI CA debugging infrastructure. */
5ed44076 MD	50	#define _COMPONENT ACPI_BUS
	51	ACPI_MODULE_NAME("PCI")
	52
	53	struct acpi_pci_devinfo {
49e48b8a MD	54	struct pci_devinfo ap_dinfo;
49e48b8a MD	55	ACPI_HANDLE ap_handle;
10f97674	56	int ap_flags;
5ed44076 MD	57	};
5ed44076 MD	58
10f97674 AP	59	ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods");
	60
	61	/* Be sure that ACPI and PCI power states are equivalent. */
	62	CTASSERT(ACPI_STATE_D0 == PCI_POWERSTATE_D0);
	63	CTASSERT(ACPI_STATE_D1 == PCI_POWERSTATE_D1);
	64	CTASSERT(ACPI_STATE_D2 == PCI_POWERSTATE_D2);
	65	CTASSERT(ACPI_STATE_D3 == PCI_POWERSTATE_D3);
	66
5ed44076	67	static int acpi_pci_attach(device_t dev);
10f97674 AP	68	static int acpi_pci_suspend(device_t dev);
10f97674 AP	69	static int acpi_pci_resume(device_t dev);
f9d8cd12	70	static int acpi_pci_child_location_str_method(device_t cbdev,
49e48b8a	71	device_t child, char *buf, size_t buflen);
10f97674 AP	72	static int acpi_pci_probe(device_t dev);
	73	static int acpi_pci_read_ivar(device_t dev, device_t child, int which,
	74	uintptr_t *result);
	75	static int acpi_pci_write_ivar(device_t dev, device_t child, int which,
	76	uintptr_t value);
5ed44076	77	static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
49e48b8a	78	void context, void *status);
10f97674 AP	79	static int acpi_pci_set_powerstate_method(device_t dev, device_t child,
	80	int state);
	81	static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child);
5ed44076 MD	82
	83	static device_method_t acpi_pci_methods[] = {
	84	/* Device interface */
	85	DEVMETHOD(device_probe, acpi_pci_probe),
	86	DEVMETHOD(device_attach, acpi_pci_attach),
6388f614 SZ	87	DEVMETHOD(device_shutdown, bus_generic_shutdown),
	88	DEVMETHOD(device_suspend, acpi_pci_suspend),
	89	DEVMETHOD(device_resume, acpi_pci_resume),
5ed44076 MD	90
5ed44076 MD	91	/* Bus interface */
6388f614 SZ	92	DEVMETHOD(bus_print_child, pci_print_child),
	93	DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
	94	DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
	95	DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
	96	DEVMETHOD(bus_delete_resource, pci_delete_resource),
	97	DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
	98	DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
	99	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
	100	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
5ed44076	101	DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar),
10f97674	102	DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar),
6388f614 SZ	103	DEVMETHOD(bus_driver_added, bus_generic_driver_added),
	104	DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
	105	DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
f9d8cd12	106	DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
5ed44076 MD	107
5ed44076 MD	108	/* PCI interface */
6388f614 SZ	109	DEVMETHOD(pci_read_config, pci_read_config_method),
	110	DEVMETHOD(pci_write_config, pci_write_config_method),
	111	DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
	112	DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
	113	DEVMETHOD(pci_enable_io, pci_enable_io_method),
	114	DEVMETHOD(pci_disable_io, pci_disable_io_method),
	115	DEVMETHOD(pci_get_powerstate, pci_get_powerstate_method),
f9d8cd12	116	DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method),
6388f614	117	DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method),
5ed44076 MD	118
	119	{ 0, 0 }
	120	};
	121
	122	static driver_t acpi_pci_driver = {
6388f614 SZ	123	"pci",
	124	acpi_pci_methods,
	125	0, /* no softc */
5ed44076 MD	126	};
5ed44076 MD	127
e20af2f4 AP	128	static devclass_t pci_devclass;
e20af2f4 AP	129
5ed44076	130	DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
f9d8cd12	131	MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
10f97674	132	MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
5ed44076	133	MODULE_VERSION(acpi_pci, 1);
5ed44076 MD	134
	135	static int
	136	acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
	137	{
	138	struct acpi_pci_devinfo *dinfo;
	139
10f97674	140	dinfo = device_get_ivars(child);
5ed44076	141	switch (which) {
f9d8cd12	142	case ACPI_IVAR_HANDLE:
5ed44076	143	*result = (uintptr_t)dinfo->ap_handle;
f9d8cd12	144	return (0);
10f97674 AP	145	case ACPI_IVAR_FLAGS:
	146	*result = (uintptr_t)dinfo->ap_flags;
	147	return (0);
5ed44076	148	}
f9d8cd12 MD	149	return (pci_read_ivar(dev, child, which, result));
	150	}
	151
	152	static int
10f97674 AP	153	acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
	154	{
	155	struct acpi_pci_devinfo *dinfo;
	156
	157	dinfo = device_get_ivars(child);
	158	switch (which) {
	159	case ACPI_IVAR_HANDLE:
	160	dinfo->ap_handle = (ACPI_HANDLE)value;
	161	return (0);
	162	case ACPI_IVAR_FLAGS:
	163	dinfo->ap_flags = (int)value;
	164	return (0);
	165	}
	166	return (pci_write_ivar(dev, child, which, value));
	167	}
	168
	169	static int
f9d8cd12 MD	170	acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
	171	size_t buflen)
	172	{
	173	struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
	174
	175	pci_child_location_str_method(cbdev, child, buf, buflen);
	176
	177	if (dinfo->ap_handle) {
10f97674	178	strlcat(buf, " handle=", buflen);
f9d8cd12 MD	179	strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
	180	}
	181	return (0);
5ed44076 MD	182	}
5ed44076 MD	183
5ed44076 MD	184	/*
	185	* PCI power manangement
	186	*/
	187	static int
	188	acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
	189	{
f9d8cd12 MD	190	ACPI_HANDLE h;
f9d8cd12 MD	191	ACPI_STATUS status;
10f97674 AP	192	int old_state, error;
	193
	194	error = 0;
	195	if (state < ACPI_STATE_D0 \|\| state > ACPI_STATE_D3)
f9d8cd12	196	return (EINVAL);
f9d8cd12 MD	197
	198	/*
	199	* We set the state using PCI Power Management outside of setting
	200	* the ACPI state. This means that when powering down a device, we
	201	* first shut it down using PCI, and then using ACPI, which lets ACPI
	202	* try to power down any Power Resources that are now no longer used.
	203	* When powering up a device, we let ACPI set the state first so that
	204	* it can enable any needed Power Resources before changing the PCI
	205	* power state.
	206	*/
10f97674	207	ACPI_SERIAL_BEGIN(pci_powerstate);
f9d8cd12 MD	208	old_state = pci_get_powerstate(child);
	209	if (old_state < state) {
	210	error = pci_set_powerstate_method(dev, child, state);
	211	if (error)
10f97674	212	goto out;
f9d8cd12 MD	213	}
f9d8cd12 MD	214	h = acpi_get_handle(child);
10f97674 AP	215	status = acpi_pwr_switch_consumer(h, state);
	216	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
	217	device_printf(dev,
	218	"Failed to set ACPI power state D%d on %s: %s\n",
	219	state, acpi_name(h), AcpiFormatException(status));
f9d8cd12	220	if (old_state > state)
10f97674 AP	221	error = pci_set_powerstate_method(dev, child, state);
	222
	223	out:
	224	ACPI_SERIAL_END(pci_powerstate);
	225	return (error);
	226	}
	227
	228	static void
	229	acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child)
	230	{
	231	ACPI_STATUS status;
	232	device_t child;
	233
	234	/*
	235	* Lookup and remove the unused device that acpi0 creates when it walks
	236	* the namespace creating devices.
	237	*/
	238	child = acpi_get_device(handle);
	239	if (child != NULL) {
	240	if (device_is_alive(child)) {
	241	/*
	242	* The TabletPC TC1000 has a second PCI-ISA bridge
	243	* that has a _HID for an acpi_sysresource device.
	244	* In that case, leave ACPI-CA's device data pointing
	245	* at the ACPI-enumerated device.
	246	*/
	247	device_printf(child,
	248	"Conflicts with PCI device %d:%d:%d\n",
	249	pci_get_bus(pci_child), pci_get_slot(pci_child),
	250	pci_get_function(pci_child));
	251	return;
	252	}
	253	KASSERT(device_get_parent(child) ==
	254	devclass_get_device(devclass_find("acpi"), 0),
	255	("%s: child (%s)'s parent is not acpi0", __func__,
	256	acpi_name(handle)));
	257	device_delete_child(device_get_parent(child), child);
	258	}
	259
	260	/*
	261	* Update ACPI-CA to use the PCI enumerated device_t for this handle.
	262	*/
	263	status = AcpiDetachData(handle, acpi_fake_objhandler);
	264	if (ACPI_FAILURE(status))
	265	kprintf("WARNING: Unable to detach object data from %s - %s\n",
	266	acpi_name(handle), AcpiFormatException(status));
	267	status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child);
	268	if (ACPI_FAILURE(status))
	269	kprintf("WARNING: Unable to attach object data to %s - %s\n",
	270	acpi_name(handle), AcpiFormatException(status));
5ed44076	271	}
5ed44076 MD	272
	273	static ACPI_STATUS
	274	acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
	275	void **status)
	276	{
	277	struct acpi_pci_devinfo *dinfo;
	278	device_t *devlist;
	279	int devcount, i, func, slot;
	280	UINT32 address;
	281
	282	ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
	283
f9d8cd12	284	if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
49e48b8a	285	return_ACPI_STATUS (AE_OK);
10f97674 AP	286	slot = ACPI_ADR_PCI_SLOT(address);
10f97674 AP	287	func = ACPI_ADR_PCI_FUNC(address);
5ed44076	288	if (device_get_children((device_t)context, &devlist, &devcount) != 0)
49e48b8a	289	return_ACPI_STATUS (AE_OK);
5ed44076 MD	290	for (i = 0; i < devcount; i++) {
	291	dinfo = device_get_ivars(devlist[i]);
	292	if (dinfo->ap_dinfo.cfg.func == func &&
	293	dinfo->ap_dinfo.cfg.slot == slot) {
	294	dinfo->ap_handle = handle;
10f97674 AP	295	acpi_pci_update_device(handle, devlist[i]);
10f97674 AP	296	break;
5ed44076 MD	297	}
5ed44076 MD	298	}
efda3bd0	299	kfree(devlist, M_TEMP);
49e48b8a	300	return_ACPI_STATUS (AE_OK);
5ed44076 MD	301	}
	302
	303	static int
	304	acpi_pci_probe(device_t dev)
	305	{
10f97674 AP	306
10f97674 AP	307	if (pcib_get_bus(dev) < 0)
5ed44076	308	return (ENXIO);
5ed44076 MD	309	if (acpi_get_handle(dev) == NULL)
5ed44076 MD	310	return (ENXIO);
49e48b8a	311	device_set_desc(dev, "ACPI PCI bus");
5ed44076 MD	312	return (0);
	313	}
	314
	315	static int
	316	acpi_pci_attach(device_t dev)
	317	{
e20af2f4	318	int busno, domain;
5ed44076 MD	319
	320	/*
	321	* Since there can be multiple independantly numbered PCI
10f97674 AP	322	* busses on systems with multiple PCI domains, we can't use
	323	* the unit number to decide which bus we are probing. We ask
	324	* the parent pcib what our domain and bus numbers are.
5ed44076	325	*/
10f97674 AP	326	busno = pcib_get_bus(dev);
10f97674 AP	327	domain = pcib_get_domain(dev);
6388f614 SZ	328	if (bootverbose) {
	329	device_printf(dev, "domain=%d, physical bus=%d\n",
	330	domain, busno);
	331	}
e20af2f4	332
5c7ffd75 AP	333	ACPI_SERIAL_INIT(pci_powerstate);
5c7ffd75 AP	334
5ed44076 MD	335	/*
	336	* First, PCI devices are added as in the normal PCI bus driver.
	337	* Afterwards, the ACPI namespace under the bridge driver is
	338	* walked to save ACPI handles to all the devices that appear in
	339	* the ACPI namespace as immediate descendants of the bridge.
	340	*
	341	* XXX: Sometimes PCI devices show up in the ACPI namespace that
	342	* pci_add_children() doesn't find. We currently just ignore
	343	* these devices.
	344	*/
e20af2f4	345	pci_add_children(dev, domain, busno, sizeof(struct acpi_pci_devinfo));
49e48b8a	346	AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
4efc8147	347	NULL, acpi_pci_save_handle, dev, NULL);
5ed44076 MD	348
	349	return (bus_generic_attach(dev));
	350	}
10f97674 AP	351
	352	int
	353	acpi_pci_suspend(device_t dev)
	354	{
6388f614 SZ	355	int dstate, error, i, numdevs;
	356	device_t acpi_dev, child, *devlist;
	357	struct pci_devinfo *dinfo;
	358
10f97674	359	acpi_dev = devclass_get_device(devclass_find("acpi"), 0);
6388f614 SZ	360	device_get_children(dev, &devlist, &numdevs);
	361
	362	/*
	363	* Save the PCI configuration space for each child and set the
	364	* device in the appropriate power state for this sleep state.
	365	*/
	366	for (i = 0; i < numdevs; i++) {
	367	child = devlist[i];
	368	dinfo = (struct pci_devinfo *)device_get_ivars(child);
	369	pci_cfg_save(child, dinfo, 0);
	370	}
	371
	372	/*
	373	* Suspend devices before potentially powering them down.
	374	*/
	375	error = bus_generic_suspend(dev);
	376	if (error) {
	377	kfree(devlist, M_TEMP);
	378	return (error);
	379	}
	380
	381	/*
	382	* Always set the device to D3. If ACPI suggests a different
	383	* power state, use it instead. If ACPI is not present, the
	384	* firmware is responsible for managing device power. Skip
	385	* children who aren't attached since they are powered down
	386	* separately. Only manage type 0 devices for now.
	387	*/
	388	for (i = 0; acpi_dev && i < numdevs; i++) {
	389	child = devlist[i];
	390	dinfo = (struct pci_devinfo *)device_get_ivars(child);
	391	if (device_is_attached(child) && dinfo->cfg.hdrtype == 0) {
	392	dstate = PCI_POWERSTATE_D3;
	393	ACPI_PWR_FOR_SLEEP(acpi_dev, child, &dstate);
	394	pci_set_powerstate(child, dstate);
	395	}
	396	}
	397
	398	kfree(devlist, M_TEMP);
	399	return (0);
10f97674 AP	400	}
	401
	402	int
	403	acpi_pci_resume(device_t dev)
	404	{
6388f614 SZ	405	int i, numdevs;
	406	device_t acpi_dev, child, *devlist;
	407	struct pci_devinfo *dinfo;
	408
10f97674	409	acpi_dev = devclass_get_device(devclass_find("acpi"), 0);
6388f614 SZ	410	device_get_children(dev, &devlist, &numdevs);
	411
	412	/*
	413	* Set each child to D0 and restore its PCI configuration space.
	414	*/
	415	for (i = 0; i < numdevs; i++) {
	416	/*
	417	* Notify ACPI we're going to D0 but ignore the result. If
	418	* ACPI is not present, the firmware is responsible for
	419	* managing device power. Only manage type 0 devices for now.
	420	*/
	421	child = devlist[i];
	422	dinfo = (struct pci_devinfo *) device_get_ivars(child);
	423	if (acpi_dev && device_is_attached(child) &&
	424	dinfo->cfg.hdrtype == 0) {
10f97674	425	ACPI_PWR_FOR_SLEEP(acpi_dev, child, NULL);
6388f614 SZ	426	pci_set_powerstate(child, PCI_POWERSTATE_D0);
	427	}
	428
	429	/*
	430	* Now the device is powered up, restore its config space.
	431	*/
	432	pci_cfg_restore(child, dinfo);
	433	}
	434
	435	kfree(devlist, M_TEMP);
	436	return (bus_generic_resume(dev));
10f97674	437	}