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

/*
 *  pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $)
 *
 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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 %04x:%02x:%02x.%d\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;
	struct acpi_pci_data *data;
	struct acpi_pci_data *pdata;
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	acpi_handle handle;
	struct pci_dev *dev;
	struct pci_bus *bus;


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

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

	status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	if (ACPI_FAILURE(status)) {
		kfree(data);
		return -ENODEV;
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
			  (char *)buffer.pointer));

	/* 
	 * 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 %04x:%02x:%02x.%d\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 %04x:%02x:%02x.%d 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 %04x:%02x:%02x.%d 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 %04x:%02x:%02x.%d 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(buffer.pointer);
	if (result)
		kfree(data);

	return result;
}

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


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

	status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n",
			  (char *) buffer.pointer));
	kfree(buffer.pointer);

	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;
	struct acpi_pci_data *data = NULL;
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };

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

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

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

	status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	if (ACPI_FAILURE(status)) {
		kfree (data);
		return -ENODEV;
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
			"%04x:%02x\n", (char *)buffer.pointer,
			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",
				(char *)buffer.pointer));
		result = -ENODEV;
		goto end;
	}

      end:
	kfree(buffer.pointer);
	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 <andrew.grover@intel.com>
	5	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
	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	101	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
21a53283	102	"Device %s has PCI address %04x:%02x:%02x.%d\n",
4be44fcd LB	103	acpi_device_bid(device), id->segment, id->bus,
4be44fcd LB	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	113	int result = 0;
087da3b4 LB	114	acpi_status status;
	115	struct acpi_pci_data *data;
	116	struct acpi_pci_data *pdata;
	117	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	118	acpi_handle handle;
4be44fcd LB	119	struct pci_dev *dev;
4be44fcd LB	120	struct pci_bus *bus;
1da177e4	121
1da177e4 LT	122
1da177e4 LT	123	if (!device \|\| !device->parent)
d550d98d	124	return -EINVAL;
1da177e4	125
36bcbec7	126	data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
087da3b4	127	if (!data)
d550d98d	128	return -ENOMEM;
087da3b4 LB	129
	130	status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	131	if (ACPI_FAILURE(status)) {
	132	kfree(data);
	133	return -ENODEV;
1da177e4	134	}
1da177e4	135
4be44fcd	136	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
087da3b4	137	(char *)buffer.pointer));
1da177e4 LT	138
	139	/*
	140	* Segment & Bus
	141	* -------------
	142	* These are obtained via the parent device's ACPI-PCI context.
	143	*/
4be44fcd LB	144	status = acpi_get_data(device->parent->handle, acpi_pci_data_handler,
4be44fcd LB	145	(void **)&pdata);
1da177e4	146	if (ACPI_FAILURE(status) \|\| !pdata \|\| !pdata->bus) {
a6fc6720 TR	147	ACPI_EXCEPTION((AE_INFO, status,
	148	"Invalid ACPI-PCI context for parent device %s",
	149	acpi_device_bid(device->parent)));
1da177e4 LT	150	result = -ENODEV;
	151	goto end;
	152	}
	153	data->id.segment = pdata->id.segment;
	154	data->id.bus = pdata->bus->number;
	155
	156	/*
	157	* Device & Function
	158	* -----------------
	159	* These are simply obtained from the device's _ADR method. Note
	160	* that a value of zero is valid.
	161	*/
	162	data->id.device = device->pnp.bus_address >> 16;
	163	data->id.function = device->pnp.bus_address & 0xFFFF;
	164
21a53283	165	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %04x:%02x:%02x.%d\n",
4be44fcd LB	166	data->id.segment, data->id.bus, data->id.device,
4be44fcd LB	167	data->id.function));
1da177e4 LT	168
	169	/*
	170	* TBD: Support slot devices (e.g. function=0xFFFF).
	171	*/
	172
	173	/*
	174	* Locate PCI Device
	175	* -----------------
	176	* Locate matching device in PCI namespace. If it doesn't exist
	177	* this typically means that the device isn't currently inserted
	178	* (e.g. docking station, port replicator, etc.).
c431ada4 RS	179	* We cannot simply search the global pci device list, since
	180	* PCI devices are added to the global pci list when the root
	181	* bridge start ops are run, which may not have happened yet.
1da177e4	182	*/
c431ada4 RS	183	bus = pci_find_bus(data->id.segment, data->id.bus);
	184	if (bus) {
	185	list_for_each_entry(dev, &bus->devices, bus_list) {
	186	if (dev->devfn == PCI_DEVFN(data->id.device,
4be44fcd	187	data->id.function)) {
c431ada4 RS	188	data->dev = dev;
	189	break;
	190	}
	191	}
	192	}
1da177e4	193	if (!data->dev) {
4be44fcd	194	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
21a53283	195	"Device %04x:%02x:%02x.%d not present in PCI namespace\n",
4be44fcd LB	196	data->id.segment, data->id.bus,
4be44fcd LB	197	data->id.device, data->id.function));
1da177e4 LT	198	result = -ENODEV;
	199	goto end;
	200	}
	201	if (!data->dev->bus) {
6468463a	202	printk(KERN_ERR PREFIX
21a53283	203	"Device %04x:%02x:%02x.%d has invalid 'bus' field\n",
a6fc6720	204	data->id.segment, data->id.bus,
6468463a	205	data->id.device, data->id.function);
1da177e4 LT	206	result = -ENODEV;
	207	goto end;
	208	}
	209
	210	/*
	211	* PCI Bridge?
	212	* -----------
	213	* If so, set the 'bus' field and install the 'bind' function to
	214	* facilitate callbacks for all of its children.
	215	*/
	216	if (data->dev->subordinate) {
4be44fcd	217	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
21a53283	218	"Device %04x:%02x:%02x.%d is a PCI bridge\n",
4be44fcd LB	219	data->id.segment, data->id.bus,
4be44fcd LB	220	data->id.device, data->id.function));
1da177e4 LT	221	data->bus = data->dev->subordinate;
	222	device->ops.bind = acpi_pci_bind;
	223	device->ops.unbind = acpi_pci_unbind;
	224	}
	225
	226	/*
	227	* Attach ACPI-PCI Context
	228	* -----------------------
	229	* Thus binding the ACPI and PCI devices.
	230	*/
	231	status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
	232	if (ACPI_FAILURE(status)) {
a6fc6720 TR	233	ACPI_EXCEPTION((AE_INFO, status,
	234	"Unable to attach ACPI-PCI context to device %s",
	235	acpi_device_bid(device)));
1da177e4 LT	236	result = -ENODEV;
	237	goto end;
	238	}
	239
	240	/*
	241	* PCI Routing Table
	242	* -----------------
	243	* Evaluate and parse _PRT, if exists. This code is independent of
	244	* PCI bridges (above) to allow parsing of _PRT objects within the
	245	* scope of non-bridge devices. Note that _PRTs within the scope of
	246	* a PCI bridge assume the bridge's subordinate bus number.
	247	*
	248	* TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
	249	*/
	250	status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
	251	if (ACPI_SUCCESS(status)) {
4be44fcd	252	if (data->bus) /* PCI-PCI bridge */
1da177e4	253	acpi_pci_irq_add_prt(device->handle, data->id.segment,
4be44fcd LB	254	data->bus->number);
	255	else /* non-bridge PCI device */
	256	acpi_pci_irq_add_prt(device->handle, data->id.segment,
	257	data->id.bus);
1da177e4 LT	258	}
1da177e4 LT	259
4be44fcd	260	end:
087da3b4	261	kfree(buffer.pointer);
1da177e4 LT	262	if (result)
	263	kfree(data);
	264
d550d98d	265	return result;
1da177e4 LT	266	}
1da177e4 LT	267
e5685b9d	268	static int acpi_pci_unbind(struct acpi_device *device)
1da177e4	269	{
4be44fcd	270	int result = 0;
087da3b4 LB	271	acpi_status status;
	272	struct acpi_pci_data *data;
	273	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4	274
1da177e4 LT	275
1da177e4 LT	276	if (!device \|\| !device->parent)
d550d98d	277	return -EINVAL;
1da177e4	278
087da3b4 LB	279	status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	280	if (ACPI_FAILURE(status))
	281	return -ENODEV;
1da177e4	282
1da177e4	283	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n",
087da3b4 LB	284	(char *) buffer.pointer));
087da3b4 LB	285	kfree(buffer.pointer);
1da177e4	286
4be44fcd LB	287	status =
	288	acpi_get_data(device->handle, acpi_pci_data_handler,
	289	(void **)&data);
1da177e4	290	if (ACPI_FAILURE(status)) {
1da177e4 LT	291	result = -ENODEV;
	292	goto end;
	293	}
	294
	295	status = acpi_detach_data(device->handle, acpi_pci_data_handler);
	296	if (ACPI_FAILURE(status)) {
a6fc6720 TR	297	ACPI_EXCEPTION((AE_INFO, status,
	298	"Unable to detach data from device %s",
	299	acpi_device_bid(device)));
1da177e4 LT	300	result = -ENODEV;
	301	goto end;
	302	}
	303	if (data->dev->subordinate) {
	304	acpi_pci_irq_del_prt(data->id.segment, data->bus->number);
	305	}
	306	kfree(data);
	307
4be44fcd	308	end:
d550d98d	309	return result;
1da177e4 LT	310	}
1da177e4 LT	311
4be44fcd LB	312	int
	313	acpi_pci_bind_root(struct acpi_device *device,
	314	struct acpi_pci_id id, struct pci_bus bus)
1da177e4	315	{
4be44fcd	316	int result = 0;
087da3b4	317	acpi_status status;
4be44fcd	318	struct acpi_pci_data *data = NULL;
087da3b4	319	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4	320
4be44fcd	321	if (!device \|\| !id \|\| !bus) {
d550d98d	322	return -EINVAL;
1da177e4 LT	323	}
1da177e4 LT	324
36bcbec7	325	data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
087da3b4	326	if (!data)
d550d98d	327	return -ENOMEM;
1da177e4 LT	328
	329	data->id = *id;
	330	data->bus = bus;
	331	device->ops.bind = acpi_pci_bind;
	332	device->ops.unbind = acpi_pci_unbind;
	333
087da3b4 LB	334	status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	335	if (ACPI_FAILURE(status)) {
	336	kfree (data);
	337	return -ENODEV;
	338	}
1da177e4 LT	339
1da177e4 LT	340	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
087da3b4 LB	341	"%04x:%02x\n", (char *)buffer.pointer,
087da3b4 LB	342	id->segment, id->bus));
1da177e4 LT	343
	344	status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
	345	if (ACPI_FAILURE(status)) {
a6fc6720 TR	346	ACPI_EXCEPTION((AE_INFO, status,
a6fc6720 TR	347	"Unable to attach ACPI-PCI context to device %s",
087da3b4	348	(char *)buffer.pointer));
1da177e4 LT	349	result = -ENODEV;
	350	goto end;
	351	}
	352
4be44fcd	353	end:
087da3b4	354	kfree(buffer.pointer);
1da177e4 LT	355	if (result != 0)
	356	kfree(data);
	357
d550d98d	358	return result;
1da177e4	359	}