[linux.git] / drivers / acpi / pci_bind.c

/*
 *  pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $)
 *
 *  Copyright (C) 2001, 2002 Andy Grover <[email protected]>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <[email protected]>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/pm.h>
#include <linux/pci.h>
#include <linux/acpi.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#define _COMPONENT		ACPI_PCI_COMPONENT
ACPI_MODULE_NAME("pci_bind");

struct acpi_pci_data {
	struct acpi_pci_id id;
	struct pci_bus *bus;
	struct pci_dev *dev;
};

static int acpi_pci_unbind(struct acpi_device *device);

static void acpi_pci_data_handler(acpi_handle handle, u32 function,
				  void *context)
{

	/* TBD: Anything we need to do here? */

	return;
}

/**
 * acpi_get_pci_id
 * ------------------
 * This function is used by the ACPI Interpreter (a.k.a. Core Subsystem)
 * to resolve PCI information for ACPI-PCI devices defined in the namespace.
 * This typically occurs when resolving PCI operation region information.
 */
acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id)
{
	int result = 0;
	acpi_status status = AE_OK;
	struct acpi_device *device = NULL;
	struct acpi_pci_data *data = NULL;


	if (!id)
		return AE_BAD_PARAMETER;

	result = acpi_bus_get_device(handle, &device);
	if (result) {
		printk(KERN_ERR PREFIX
			    "Invalid ACPI Bus context for device %s\n",
			    acpi_device_bid(device));
		return AE_NOT_EXIST;
	}

	status = acpi_get_data(handle, acpi_pci_data_handler, (void **)&data);
	if (ACPI_FAILURE(status) || !data) {
		ACPI_EXCEPTION((AE_INFO, status,
				"Invalid ACPI-PCI context for device %s",
				acpi_device_bid(device)));
		return status;
	}

	*id = data->id;

	/*
	   id->segment = data->id.segment;
	   id->bus = data->id.bus;
	   id->device = data->id.device;
	   id->function = data->id.function;
	 */

	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
			  "Device %s has PCI address %02x:%02x:%02x.%02x\n",
			  acpi_device_bid(device), id->segment, id->bus,
			  id->device, id->function));

	return AE_OK;
}

EXPORT_SYMBOL(acpi_get_pci_id);

int acpi_pci_bind(struct acpi_device *device)
{
	int result = 0;
	acpi_status status = AE_OK;
	struct acpi_pci_data *data = NULL;
	struct acpi_pci_data *pdata = NULL;
	char *pathname = NULL;
	struct acpi_buffer buffer = { 0, NULL };
	acpi_handle handle = NULL;
	struct pci_dev *dev;
	struct pci_bus *bus;


	if (!device || !device->parent)
		return -EINVAL;

	pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
	if (!pathname)
		return -ENOMEM;
	buffer.length = ACPI_PATHNAME_MAX;
	buffer.pointer = pathname;

	data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
	if (!data) {
		kfree(pathname);
		return -ENOMEM;
	}

	acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
			  pathname));

	/* 
	 * Segment & Bus
	 * -------------
	 * These are obtained via the parent device's ACPI-PCI context.
	 */
	status = acpi_get_data(device->parent->handle, acpi_pci_data_handler,
			       (void **)&pdata);
	if (ACPI_FAILURE(status) || !pdata || !pdata->bus) {
		ACPI_EXCEPTION((AE_INFO, status,
				"Invalid ACPI-PCI context for parent device %s",
				acpi_device_bid(device->parent)));
		result = -ENODEV;
		goto end;
	}
	data->id.segment = pdata->id.segment;
	data->id.bus = pdata->bus->number;

	/*
	 * Device & Function
	 * -----------------
	 * These are simply obtained from the device's _ADR method.  Note
	 * that a value of zero is valid.
	 */
	data->id.device = device->pnp.bus_address >> 16;
	data->id.function = device->pnp.bus_address & 0xFFFF;

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %02x:%02x:%02x.%02x\n",
			  data->id.segment, data->id.bus, data->id.device,
			  data->id.function));

	/*
	 * TBD: Support slot devices (e.g. function=0xFFFF).
	 */

	/* 
	 * Locate PCI Device
	 * -----------------
	 * Locate matching device in PCI namespace.  If it doesn't exist
	 * this typically means that the device isn't currently inserted
	 * (e.g. docking station, port replicator, etc.).
	 * We cannot simply search the global pci device list, since
	 * PCI devices are added to the global pci list when the root
	 * bridge start ops are run, which may not have happened yet.
	 */
	bus = pci_find_bus(data->id.segment, data->id.bus);
	if (bus) {
		list_for_each_entry(dev, &bus->devices, bus_list) {
			if (dev->devfn == PCI_DEVFN(data->id.device,
						    data->id.function)) {
				data->dev = dev;
				break;
			}
		}
	}
	if (!data->dev) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Device %02x:%02x:%02x.%02x not present in PCI namespace\n",
				  data->id.segment, data->id.bus,
				  data->id.device, data->id.function));
		result = -ENODEV;
		goto end;
	}
	if (!data->dev->bus) {
		printk(KERN_ERR PREFIX
			    "Device %02x:%02x:%02x.%02x has invalid 'bus' field\n",
			    data->id.segment, data->id.bus,
			    data->id.device, data->id.function);
		result = -ENODEV;
		goto end;
	}

	/*
	 * PCI Bridge?
	 * -----------
	 * If so, set the 'bus' field and install the 'bind' function to 
	 * facilitate callbacks for all of its children.
	 */
	if (data->dev->subordinate) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Device %02x:%02x:%02x.%02x is a PCI bridge\n",
				  data->id.segment, data->id.bus,
				  data->id.device, data->id.function));
		data->bus = data->dev->subordinate;
		device->ops.bind = acpi_pci_bind;
		device->ops.unbind = acpi_pci_unbind;
	}

	/*
	 * Attach ACPI-PCI Context
	 * -----------------------
	 * Thus binding the ACPI and PCI devices.
	 */
	status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status,
				"Unable to attach ACPI-PCI context to device %s",
				acpi_device_bid(device)));
		result = -ENODEV;
		goto end;
	}

	/*
	 * PCI Routing Table
	 * -----------------
	 * Evaluate and parse _PRT, if exists.  This code is independent of 
	 * PCI bridges (above) to allow parsing of _PRT objects within the
	 * scope of non-bridge devices.  Note that _PRTs within the scope of
	 * a PCI bridge assume the bridge's subordinate bus number.
	 *
	 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
	 */
	status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
	if (ACPI_SUCCESS(status)) {
		if (data->bus)	/* PCI-PCI bridge */
			acpi_pci_irq_add_prt(device->handle, data->id.segment,
					     data->bus->number);
		else		/* non-bridge PCI device */
			acpi_pci_irq_add_prt(device->handle, data->id.segment,
					     data->id.bus);
	}

      end:
	kfree(pathname);
	if (result)
		kfree(data);

	return result;
}

static int acpi_pci_unbind(struct acpi_device *device)
{
	int result = 0;
	acpi_status status = AE_OK;
	struct acpi_pci_data *data = NULL;
	char *pathname = NULL;
	struct acpi_buffer buffer = { 0, NULL };


	if (!device || !device->parent)
		return -EINVAL;

	pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
	if (!pathname)
		return -ENOMEM;

	buffer.length = ACPI_PATHNAME_MAX;
	buffer.pointer = pathname;
	acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n",
			  pathname));
	kfree(pathname);

	status =
	    acpi_get_data(device->handle, acpi_pci_data_handler,
			  (void **)&data);
	if (ACPI_FAILURE(status)) {
		result = -ENODEV;
		goto end;
	}

	status = acpi_detach_data(device->handle, acpi_pci_data_handler);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status,
				"Unable to detach data from device %s",
				acpi_device_bid(device)));
		result = -ENODEV;
		goto end;
	}
	if (data->dev->subordinate) {
		acpi_pci_irq_del_prt(data->id.segment, data->bus->number);
	}
	kfree(data);

      end:
	return result;
}

int
acpi_pci_bind_root(struct acpi_device *device,
		   struct acpi_pci_id *id, struct pci_bus *bus)
{
	int result = 0;
	acpi_status status = AE_OK;
	struct acpi_pci_data *data = NULL;
	char *pathname = NULL;
	struct acpi_buffer buffer = { 0, NULL };

	pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
	if (!pathname)
		return -ENOMEM;

	buffer.length = ACPI_PATHNAME_MAX;
	buffer.pointer = pathname;

	if (!device || !id || !bus) {
		kfree(pathname);
		return -EINVAL;
	}

	data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
	if (!data) {
		kfree(pathname);
		return -ENOMEM;
	}

	data->id = *id;
	data->bus = bus;
	device->ops.bind = acpi_pci_bind;
	device->ops.unbind = acpi_pci_unbind;

	acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
			  "%02x:%02x\n", pathname, id->segment, id->bus));

	status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status,
				"Unable to attach ACPI-PCI context to device %s",
				pathname));
		result = -ENODEV;
		goto end;
	}

      end:
	kfree(pathname);
	if (result != 0)
		kfree(data);

	return result;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $)
	3	*
	4	* Copyright (C) 2001, 2002 Andy Grover <[email protected]>
	5	* Copyright (C) 2001, 2002 Paul Diefenbaugh <[email protected]>
	6	*
	7	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or (at
	12	* your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write to the Free Software Foundation, Inc.,
	21	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	22	*
	23	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	24	*/
	25
	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
	28	#include <linux/init.h>
	29	#include <linux/types.h>
	30	#include <linux/proc_fs.h>
	31	#include <linux/spinlock.h>
	32	#include <linux/pm.h>
	33	#include <linux/pci.h>
	34	#include <linux/acpi.h>
	35	#include <acpi/acpi_bus.h>
	36	#include <acpi/acpi_drivers.h>
	37
1da177e4	38	#define _COMPONENT ACPI_PCI_COMPONENT
f52fd66d	39	ACPI_MODULE_NAME("pci_bind");
1da177e4 LT	40
1da177e4 LT	41	struct acpi_pci_data {
4be44fcd LB	42	struct acpi_pci_id id;
	43	struct pci_bus *bus;
	44	struct pci_dev *dev;
1da177e4 LT	45	};
1da177e4 LT	46
e5685b9d AB	47	static int acpi_pci_unbind(struct acpi_device *device);
e5685b9d AB	48
8713cbef AB	49	static void acpi_pci_data_handler(acpi_handle handle, u32 function,
8713cbef AB	50	void *context)
1da177e4	51	{
1da177e4 LT	52
	53	/* TBD: Anything we need to do here? */
	54
d550d98d	55	return;
1da177e4 LT	56	}
1da177e4 LT	57
1da177e4	58	/**
4ce448e5	59	* acpi_get_pci_id
1da177e4 LT	60	* ------------------
	61	* This function is used by the ACPI Interpreter (a.k.a. Core Subsystem)
	62	* to resolve PCI information for ACPI-PCI devices defined in the namespace.
	63	* This typically occurs when resolving PCI operation region information.
	64	*/
4be44fcd	65	acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id)
1da177e4	66	{
4be44fcd LB	67	int result = 0;
	68	acpi_status status = AE_OK;
	69	struct acpi_device *device = NULL;
	70	struct acpi_pci_data *data = NULL;
1da177e4	71
1da177e4 LT	72
1da177e4 LT	73	if (!id)
d550d98d	74	return AE_BAD_PARAMETER;
1da177e4 LT	75
	76	result = acpi_bus_get_device(handle, &device);
	77	if (result) {
6468463a LB	78	printk(KERN_ERR PREFIX
	79	"Invalid ACPI Bus context for device %s\n",
	80	acpi_device_bid(device));
d550d98d	81	return AE_NOT_EXIST;
1da177e4 LT	82	}
1da177e4 LT	83
4be44fcd	84	status = acpi_get_data(handle, acpi_pci_data_handler, (void **)&data);
4ce448e5	85	if (ACPI_FAILURE(status) \|\| !data) {
a6fc6720 TR	86	ACPI_EXCEPTION((AE_INFO, status,
	87	"Invalid ACPI-PCI context for device %s",
	88	acpi_device_bid(device)));
d550d98d	89	return status;
1da177e4 LT	90	}
	91
	92	*id = data->id;
4be44fcd	93
1da177e4	94	/*
4be44fcd LB	95	id->segment = data->id.segment;
	96	id->bus = data->id.bus;
	97	id->device = data->id.device;
	98	id->function = data->id.function;
	99	*/
1da177e4	100
4be44fcd LB	101	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	102	"Device %s has PCI address %02x:%02x:%02x.%02x\n",
	103	acpi_device_bid(device), id->segment, id->bus,
	104	id->device, id->function));
1da177e4	105
d550d98d	106	return AE_OK;
1da177e4	107	}
4be44fcd	108
4ce448e5	109	EXPORT_SYMBOL(acpi_get_pci_id);
1da177e4	110
4be44fcd	111	int acpi_pci_bind(struct acpi_device *device)
1da177e4	112	{
4be44fcd LB	113	int result = 0;
	114	acpi_status status = AE_OK;
	115	struct acpi_pci_data *data = NULL;
	116	struct acpi_pci_data *pdata = NULL;
	117	char *pathname = NULL;
	118	struct acpi_buffer buffer = { 0, NULL };
	119	acpi_handle handle = NULL;
	120	struct pci_dev *dev;
	121	struct pci_bus *bus;
1da177e4	122
1da177e4 LT	123
1da177e4 LT	124	if (!device \|\| !device->parent)
d550d98d	125	return -EINVAL;
1da177e4	126
36bcbec7	127	pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
4be44fcd	128	if (!pathname)
d550d98d	129	return -ENOMEM;
1da177e4 LT	130	buffer.length = ACPI_PATHNAME_MAX;
	131	buffer.pointer = pathname;
	132
36bcbec7	133	data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
4be44fcd LB	134	if (!data) {
4be44fcd LB	135	kfree(pathname);
d550d98d	136	return -ENOMEM;
1da177e4	137	}
1da177e4 LT	138
1da177e4 LT	139	acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
4be44fcd LB	140	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
4be44fcd LB	141	pathname));
1da177e4 LT	142
	143	/*
	144	* Segment & Bus
	145	* -------------
	146	* These are obtained via the parent device's ACPI-PCI context.
	147	*/
4be44fcd LB	148	status = acpi_get_data(device->parent->handle, acpi_pci_data_handler,
4be44fcd LB	149	(void **)&pdata);
1da177e4	150	if (ACPI_FAILURE(status) \|\| !pdata \|\| !pdata->bus) {
a6fc6720 TR	151	ACPI_EXCEPTION((AE_INFO, status,
	152	"Invalid ACPI-PCI context for parent device %s",
	153	acpi_device_bid(device->parent)));
1da177e4 LT	154	result = -ENODEV;
	155	goto end;
	156	}
	157	data->id.segment = pdata->id.segment;
	158	data->id.bus = pdata->bus->number;
	159
	160	/*
	161	* Device & Function
	162	* -----------------
	163	* These are simply obtained from the device's _ADR method. Note
	164	* that a value of zero is valid.
	165	*/
	166	data->id.device = device->pnp.bus_address >> 16;
	167	data->id.function = device->pnp.bus_address & 0xFFFF;
	168
	169	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %02x:%02x:%02x.%02x\n",
4be44fcd LB	170	data->id.segment, data->id.bus, data->id.device,
4be44fcd LB	171	data->id.function));
1da177e4 LT	172
	173	/*
	174	* TBD: Support slot devices (e.g. function=0xFFFF).
	175	*/
	176
	177	/*
	178	* Locate PCI Device
	179	* -----------------
	180	* Locate matching device in PCI namespace. If it doesn't exist
	181	* this typically means that the device isn't currently inserted
	182	* (e.g. docking station, port replicator, etc.).
c431ada4 RS	183	* We cannot simply search the global pci device list, since
	184	* PCI devices are added to the global pci list when the root
	185	* bridge start ops are run, which may not have happened yet.
1da177e4	186	*/
c431ada4 RS	187	bus = pci_find_bus(data->id.segment, data->id.bus);
	188	if (bus) {
	189	list_for_each_entry(dev, &bus->devices, bus_list) {
	190	if (dev->devfn == PCI_DEVFN(data->id.device,
4be44fcd	191	data->id.function)) {
c431ada4 RS	192	data->dev = dev;
	193	break;
	194	}
	195	}
	196	}
1da177e4	197	if (!data->dev) {
4be44fcd LB	198	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	199	"Device %02x:%02x:%02x.%02x not present in PCI namespace\n",
	200	data->id.segment, data->id.bus,
	201	data->id.device, data->id.function));
1da177e4 LT	202	result = -ENODEV;
	203	goto end;
	204	}
	205	if (!data->dev->bus) {
6468463a LB	206	printk(KERN_ERR PREFIX
6468463a LB	207	"Device %02x:%02x:%02x.%02x has invalid 'bus' field\n",
a6fc6720	208	data->id.segment, data->id.bus,
6468463a	209	data->id.device, data->id.function);
1da177e4 LT	210	result = -ENODEV;
	211	goto end;
	212	}
	213
	214	/*
	215	* PCI Bridge?
	216	* -----------
	217	* If so, set the 'bus' field and install the 'bind' function to
	218	* facilitate callbacks for all of its children.
	219	*/
	220	if (data->dev->subordinate) {
4be44fcd LB	221	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	222	"Device %02x:%02x:%02x.%02x is a PCI bridge\n",
	223	data->id.segment, data->id.bus,
	224	data->id.device, data->id.function));
1da177e4 LT	225	data->bus = data->dev->subordinate;
	226	device->ops.bind = acpi_pci_bind;
	227	device->ops.unbind = acpi_pci_unbind;
	228	}
	229
	230	/*
	231	* Attach ACPI-PCI Context
	232	* -----------------------
	233	* Thus binding the ACPI and PCI devices.
	234	*/
	235	status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
	236	if (ACPI_FAILURE(status)) {
a6fc6720 TR	237	ACPI_EXCEPTION((AE_INFO, status,
	238	"Unable to attach ACPI-PCI context to device %s",
	239	acpi_device_bid(device)));
1da177e4 LT	240	result = -ENODEV;
	241	goto end;
	242	}
	243
	244	/*
	245	* PCI Routing Table
	246	* -----------------
	247	* Evaluate and parse _PRT, if exists. This code is independent of
	248	* PCI bridges (above) to allow parsing of _PRT objects within the
	249	* scope of non-bridge devices. Note that _PRTs within the scope of
	250	* a PCI bridge assume the bridge's subordinate bus number.
	251	*
	252	* TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
	253	*/
	254	status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
	255	if (ACPI_SUCCESS(status)) {
4be44fcd	256	if (data->bus) /* PCI-PCI bridge */
1da177e4	257	acpi_pci_irq_add_prt(device->handle, data->id.segment,
4be44fcd LB	258	data->bus->number);
	259	else /* non-bridge PCI device */
	260	acpi_pci_irq_add_prt(device->handle, data->id.segment,
	261	data->id.bus);
1da177e4 LT	262	}
1da177e4 LT	263
4be44fcd	264	end:
1da177e4 LT	265	kfree(pathname);
	266	if (result)
	267	kfree(data);
	268
d550d98d	269	return result;
1da177e4 LT	270	}
1da177e4 LT	271
e5685b9d	272	static int acpi_pci_unbind(struct acpi_device *device)
1da177e4	273	{
4be44fcd LB	274	int result = 0;
	275	acpi_status status = AE_OK;
	276	struct acpi_pci_data *data = NULL;
	277	char *pathname = NULL;
	278	struct acpi_buffer buffer = { 0, NULL };
1da177e4	279
1da177e4 LT	280
1da177e4 LT	281	if (!device \|\| !device->parent)
d550d98d	282	return -EINVAL;
1da177e4	283
36bcbec7	284	pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
4be44fcd	285	if (!pathname)
d550d98d	286	return -ENOMEM;
1da177e4 LT	287
	288	buffer.length = ACPI_PATHNAME_MAX;
	289	buffer.pointer = pathname;
	290	acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	291	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n",
4be44fcd	292	pathname));
1da177e4 LT	293	kfree(pathname);
1da177e4 LT	294
4be44fcd LB	295	status =
	296	acpi_get_data(device->handle, acpi_pci_data_handler,
	297	(void **)&data);
1da177e4	298	if (ACPI_FAILURE(status)) {
1da177e4 LT	299	result = -ENODEV;
	300	goto end;
	301	}
	302
	303	status = acpi_detach_data(device->handle, acpi_pci_data_handler);
	304	if (ACPI_FAILURE(status)) {
a6fc6720 TR	305	ACPI_EXCEPTION((AE_INFO, status,
	306	"Unable to detach data from device %s",
	307	acpi_device_bid(device)));
1da177e4 LT	308	result = -ENODEV;
	309	goto end;
	310	}
	311	if (data->dev->subordinate) {
	312	acpi_pci_irq_del_prt(data->id.segment, data->bus->number);
	313	}
	314	kfree(data);
	315
4be44fcd	316	end:
d550d98d	317	return result;
1da177e4 LT	318	}
1da177e4 LT	319
4be44fcd LB	320	int
	321	acpi_pci_bind_root(struct acpi_device *device,
	322	struct acpi_pci_id id, struct pci_bus bus)
1da177e4	323	{
4be44fcd LB	324	int result = 0;
	325	acpi_status status = AE_OK;
	326	struct acpi_pci_data *data = NULL;
	327	char *pathname = NULL;
	328	struct acpi_buffer buffer = { 0, NULL };
1da177e4	329
36bcbec7	330	pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
4be44fcd	331	if (!pathname)
d550d98d	332	return -ENOMEM;
1da177e4 LT	333
	334	buffer.length = ACPI_PATHNAME_MAX;
	335	buffer.pointer = pathname;
	336
4be44fcd	337	if (!device \|\| !id \|\| !bus) {
1da177e4	338	kfree(pathname);
d550d98d	339	return -EINVAL;
1da177e4 LT	340	}
1da177e4 LT	341
36bcbec7	342	data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
4be44fcd	343	if (!data) {
1da177e4	344	kfree(pathname);
d550d98d	345	return -ENOMEM;
1da177e4	346	}
1da177e4 LT	347
	348	data->id = *id;
	349	data->bus = bus;
	350	device->ops.bind = acpi_pci_bind;
	351	device->ops.unbind = acpi_pci_unbind;
	352
	353	acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	354
	355	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
4be44fcd	356	"%02x:%02x\n", pathname, id->segment, id->bus));
1da177e4 LT	357
	358	status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
	359	if (ACPI_FAILURE(status)) {
a6fc6720 TR	360	ACPI_EXCEPTION((AE_INFO, status,
	361	"Unable to attach ACPI-PCI context to device %s",
	362	pathname));
1da177e4 LT	363	result = -ENODEV;
	364	goto end;
	365	}
	366
4be44fcd	367	end:
1da177e4 LT	368	kfree(pathname);
	369	if (result != 0)
	370	kfree(data);
	371
d550d98d	372	return result;
1da177e4	373	}