[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 void acpi_pci_data_handler(acpi_handle handle, u32 function,
				  void *context)
{
	ACPI_FUNCTION_TRACE("acpi_pci_data_handler");

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

	return_VOID;
}

/**
 * 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;

	ACPI_FUNCTION_TRACE("acpi_get_pci_id");

	if (!id)
		return_ACPI_STATUS(AE_BAD_PARAMETER);

	result = acpi_bus_get_device(handle, &device);
	if (result) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Invalid ACPI Bus context for device %s\n",
				  acpi_device_bid(device)));
		return_ACPI_STATUS(AE_NOT_EXIST);
	}

	status = acpi_get_data(handle, acpi_pci_data_handler, (void **)&data);
	if (ACPI_FAILURE(status) || !data) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Invalid ACPI-PCI context for device %s\n",
				  acpi_device_bid(device)));
		return_ACPI_STATUS(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_ACPI_STATUS(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;

	ACPI_FUNCTION_TRACE("acpi_pci_bind");

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

	pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
	if (!pathname)
		return_VALUE(-ENOMEM);
	memset(pathname, 0, ACPI_PATHNAME_MAX);
	buffer.length = ACPI_PATHNAME_MAX;
	buffer.pointer = pathname;

	data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
	if (!data) {
		kfree(pathname);
		return_VALUE(-ENOMEM);
	}
	memset(data, 0, sizeof(struct acpi_pci_data));

	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_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Invalid ACPI-PCI context for parent device %s\n",
				  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) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "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_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Unable to attach ACPI-PCI context to device %s\n",
				  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_VALUE(result);
}

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 };

	ACPI_FUNCTION_TRACE("acpi_pci_unbind");

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

	pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
	if (!pathname)
		return_VALUE(-ENOMEM);
	memset(pathname, 0, ACPI_PATHNAME_MAX);

	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)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Unable to get data from device %s\n",
				  acpi_device_bid(device)));
		result = -ENODEV;
		goto end;
	}

	status = acpi_detach_data(device->handle, acpi_pci_data_handler);
	if (ACPI_FAILURE(status)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Unable to detach data from device %s\n",
				  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_VALUE(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 };

	ACPI_FUNCTION_TRACE("acpi_pci_bind_root");

	pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
	if (!pathname)
		return_VALUE(-ENOMEM);
	memset(pathname, 0, ACPI_PATHNAME_MAX);

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

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

	data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
	if (!data) {
		kfree(pathname);
		return_VALUE(-ENOMEM);
	}
	memset(data, 0, sizeof(struct acpi_pci_data));

	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_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Unable to attach ACPI-PCI context to device %s\n",
				  pathname));
		result = -ENODEV;
		goto end;
	}

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

	return_VALUE(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
4be44fcd	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
8713cbef AB	47	static void acpi_pci_data_handler(acpi_handle handle, u32 function,
8713cbef AB	48	void *context)
1da177e4 LT	49	{
	50	ACPI_FUNCTION_TRACE("acpi_pci_data_handler");
	51
	52	/* TBD: Anything we need to do here? */
	53
	54	return_VOID;
	55	}
	56
1da177e4	57	/**
4ce448e5	58	* acpi_get_pci_id
1da177e4 LT	59	* ------------------
	60	* This function is used by the ACPI Interpreter (a.k.a. Core Subsystem)
	61	* to resolve PCI information for ACPI-PCI devices defined in the namespace.
	62	* This typically occurs when resolving PCI operation region information.
	63	*/
4be44fcd	64	acpi_status acpi_get_pci_id(acpi_handle handle, struct acpi_pci_id *id)
1da177e4	65	{
4be44fcd LB	66	int result = 0;
	67	acpi_status status = AE_OK;
	68	struct acpi_device *device = NULL;
	69	struct acpi_pci_data *data = NULL;
1da177e4	70
4ce448e5	71	ACPI_FUNCTION_TRACE("acpi_get_pci_id");
1da177e4 LT	72
	73	if (!id)
	74	return_ACPI_STATUS(AE_BAD_PARAMETER);
	75
	76	result = acpi_bus_get_device(handle, &device);
	77	if (result) {
4be44fcd LB	78	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	79	"Invalid ACPI Bus context for device %s\n",
	80	acpi_device_bid(device)));
1da177e4 LT	81	return_ACPI_STATUS(AE_NOT_EXIST);
	82	}
	83
4be44fcd	84	status = acpi_get_data(handle, acpi_pci_data_handler, (void **)&data);
4ce448e5	85	if (ACPI_FAILURE(status) \|\| !data) {
4be44fcd LB	86	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	87	"Invalid ACPI-PCI context for device %s\n",
	88	acpi_device_bid(device)));
1da177e4 LT	89	return_ACPI_STATUS(status);
	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 LT	105
	106	return_ACPI_STATUS(AE_OK);
	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 LT	122
	123	ACPI_FUNCTION_TRACE("acpi_pci_bind");
	124
	125	if (!device \|\| !device->parent)
	126	return_VALUE(-EINVAL);
	127
	128	pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
4be44fcd	129	if (!pathname)
1da177e4 LT	130	return_VALUE(-ENOMEM);
	131	memset(pathname, 0, ACPI_PATHNAME_MAX);
	132	buffer.length = ACPI_PATHNAME_MAX;
	133	buffer.pointer = pathname;
	134
	135	data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
4be44fcd LB	136	if (!data) {
4be44fcd LB	137	kfree(pathname);
1da177e4 LT	138	return_VALUE(-ENOMEM);
	139	}
	140	memset(data, 0, sizeof(struct acpi_pci_data));
	141
	142	acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
4be44fcd LB	143	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n",
4be44fcd LB	144	pathname));
1da177e4 LT	145
	146	/*
	147	* Segment & Bus
	148	* -------------
	149	* These are obtained via the parent device's ACPI-PCI context.
	150	*/
4be44fcd LB	151	status = acpi_get_data(device->parent->handle, acpi_pci_data_handler,
4be44fcd LB	152	(void **)&pdata);
1da177e4	153	if (ACPI_FAILURE(status) \|\| !pdata \|\| !pdata->bus) {
4be44fcd LB	154	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	155	"Invalid ACPI-PCI context for parent device %s\n",
	156	acpi_device_bid(device->parent)));
1da177e4 LT	157	result = -ENODEV;
	158	goto end;
	159	}
	160	data->id.segment = pdata->id.segment;
	161	data->id.bus = pdata->bus->number;
	162
	163	/*
	164	* Device & Function
	165	* -----------------
	166	* These are simply obtained from the device's _ADR method. Note
	167	* that a value of zero is valid.
	168	*/
	169	data->id.device = device->pnp.bus_address >> 16;
	170	data->id.function = device->pnp.bus_address & 0xFFFF;
	171
	172	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %02x:%02x:%02x.%02x\n",
4be44fcd LB	173	data->id.segment, data->id.bus, data->id.device,
4be44fcd LB	174	data->id.function));
1da177e4 LT	175
	176	/*
	177	* TBD: Support slot devices (e.g. function=0xFFFF).
	178	*/
	179
	180	/*
	181	* Locate PCI Device
	182	* -----------------
	183	* Locate matching device in PCI namespace. If it doesn't exist
	184	* this typically means that the device isn't currently inserted
	185	* (e.g. docking station, port replicator, etc.).
c431ada4 RS	186	* We cannot simply search the global pci device list, since
	187	* PCI devices are added to the global pci list when the root
	188	* bridge start ops are run, which may not have happened yet.
1da177e4	189	*/
c431ada4 RS	190	bus = pci_find_bus(data->id.segment, data->id.bus);
	191	if (bus) {
	192	list_for_each_entry(dev, &bus->devices, bus_list) {
	193	if (dev->devfn == PCI_DEVFN(data->id.device,
4be44fcd	194	data->id.function)) {
c431ada4 RS	195	data->dev = dev;
	196	break;
	197	}
	198	}
	199	}
1da177e4	200	if (!data->dev) {
4be44fcd LB	201	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	202	"Device %02x:%02x:%02x.%02x not present in PCI namespace\n",
	203	data->id.segment, data->id.bus,
	204	data->id.device, data->id.function));
1da177e4 LT	205	result = -ENODEV;
	206	goto end;
	207	}
	208	if (!data->dev->bus) {
4be44fcd LB	209	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	210	"Device %02x:%02x:%02x.%02x has invalid 'bus' field\n",
	211	data->id.segment, data->id.bus,
	212	data->id.device, data->id.function));
1da177e4 LT	213	result = -ENODEV;
	214	goto end;
	215	}
	216
	217	/*
	218	* PCI Bridge?
	219	* -----------
	220	* If so, set the 'bus' field and install the 'bind' function to
	221	* facilitate callbacks for all of its children.
	222	*/
	223	if (data->dev->subordinate) {
4be44fcd LB	224	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	225	"Device %02x:%02x:%02x.%02x is a PCI bridge\n",
	226	data->id.segment, data->id.bus,
	227	data->id.device, data->id.function));
1da177e4 LT	228	data->bus = data->dev->subordinate;
	229	device->ops.bind = acpi_pci_bind;
	230	device->ops.unbind = acpi_pci_unbind;
	231	}
	232
	233	/*
	234	* Attach ACPI-PCI Context
	235	* -----------------------
	236	* Thus binding the ACPI and PCI devices.
	237	*/
	238	status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
	239	if (ACPI_FAILURE(status)) {
	240	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
4be44fcd LB	241	"Unable to attach ACPI-PCI context to device %s\n",
4be44fcd LB	242	acpi_device_bid(device)));
1da177e4 LT	243	result = -ENODEV;
	244	goto end;
	245	}
	246
	247	/*
	248	* PCI Routing Table
	249	* -----------------
	250	* Evaluate and parse _PRT, if exists. This code is independent of
	251	* PCI bridges (above) to allow parsing of _PRT objects within the
	252	* scope of non-bridge devices. Note that _PRTs within the scope of
	253	* a PCI bridge assume the bridge's subordinate bus number.
	254	*
	255	* TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
	256	*/
	257	status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
	258	if (ACPI_SUCCESS(status)) {
4be44fcd	259	if (data->bus) /* PCI-PCI bridge */
1da177e4	260	acpi_pci_irq_add_prt(device->handle, data->id.segment,
4be44fcd LB	261	data->bus->number);
	262	else /* non-bridge PCI device */
	263	acpi_pci_irq_add_prt(device->handle, data->id.segment,
	264	data->id.bus);
1da177e4 LT	265	}
1da177e4 LT	266
4be44fcd	267	end:
1da177e4 LT	268	kfree(pathname);
	269	if (result)
	270	kfree(data);
	271
	272	return_VALUE(result);
	273	}
	274
4be44fcd	275	int acpi_pci_unbind(struct acpi_device *device)
1da177e4	276	{
4be44fcd LB	277	int result = 0;
	278	acpi_status status = AE_OK;
	279	struct acpi_pci_data *data = NULL;
	280	char *pathname = NULL;
	281	struct acpi_buffer buffer = { 0, NULL };
1da177e4 LT	282
	283	ACPI_FUNCTION_TRACE("acpi_pci_unbind");
	284
	285	if (!device \|\| !device->parent)
	286	return_VALUE(-EINVAL);
	287
4be44fcd LB	288	pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
4be44fcd LB	289	if (!pathname)
1da177e4 LT	290	return_VALUE(-ENOMEM);
	291	memset(pathname, 0, ACPI_PATHNAME_MAX);
	292
	293	buffer.length = ACPI_PATHNAME_MAX;
	294	buffer.pointer = pathname;
	295	acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	296	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n",
4be44fcd	297	pathname));
1da177e4 LT	298	kfree(pathname);
1da177e4 LT	299
4be44fcd LB	300	status =
	301	acpi_get_data(device->handle, acpi_pci_data_handler,
	302	(void **)&data);
1da177e4 LT	303	if (ACPI_FAILURE(status)) {
1da177e4 LT	304	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
4be44fcd LB	305	"Unable to get data from device %s\n",
4be44fcd LB	306	acpi_device_bid(device)));
1da177e4 LT	307	result = -ENODEV;
	308	goto end;
	309	}
	310
	311	status = acpi_detach_data(device->handle, acpi_pci_data_handler);
	312	if (ACPI_FAILURE(status)) {
	313	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
4be44fcd LB	314	"Unable to detach data from device %s\n",
4be44fcd LB	315	acpi_device_bid(device)));
1da177e4 LT	316	result = -ENODEV;
	317	goto end;
	318	}
	319	if (data->dev->subordinate) {
	320	acpi_pci_irq_del_prt(data->id.segment, data->bus->number);
	321	}
	322	kfree(data);
	323
4be44fcd	324	end:
1da177e4 LT	325	return_VALUE(result);
	326	}
	327
4be44fcd LB	328	int
	329	acpi_pci_bind_root(struct acpi_device *device,
	330	struct acpi_pci_id id, struct pci_bus bus)
1da177e4	331	{
4be44fcd LB	332	int result = 0;
	333	acpi_status status = AE_OK;
	334	struct acpi_pci_data *data = NULL;
	335	char *pathname = NULL;
	336	struct acpi_buffer buffer = { 0, NULL };
1da177e4 LT	337
	338	ACPI_FUNCTION_TRACE("acpi_pci_bind_root");
	339
	340	pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL);
4be44fcd	341	if (!pathname)
1da177e4 LT	342	return_VALUE(-ENOMEM);
	343	memset(pathname, 0, ACPI_PATHNAME_MAX);
	344
	345	buffer.length = ACPI_PATHNAME_MAX;
	346	buffer.pointer = pathname;
	347
4be44fcd	348	if (!device \|\| !id \|\| !bus) {
1da177e4 LT	349	kfree(pathname);
	350	return_VALUE(-EINVAL);
	351	}
	352
	353	data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL);
4be44fcd	354	if (!data) {
1da177e4 LT	355	kfree(pathname);
	356	return_VALUE(-ENOMEM);
	357	}
	358	memset(data, 0, sizeof(struct acpi_pci_data));
	359
	360	data->id = *id;
	361	data->bus = bus;
	362	device->ops.bind = acpi_pci_bind;
	363	device->ops.unbind = acpi_pci_unbind;
	364
	365	acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer);
	366
	367	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to "
4be44fcd	368	"%02x:%02x\n", pathname, id->segment, id->bus));
1da177e4 LT	369
	370	status = acpi_attach_data(device->handle, acpi_pci_data_handler, data);
	371	if (ACPI_FAILURE(status)) {
	372	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
4be44fcd LB	373	"Unable to attach ACPI-PCI context to device %s\n",
4be44fcd LB	374	pathname));
1da177e4 LT	375	result = -ENODEV;
	376	goto end;
	377	}
	378
4be44fcd	379	end:
1da177e4 LT	380	kfree(pathname);
	381	if (result != 0)
	382	kfree(data);
	383
	384	return_VALUE(result);
	385	}