[deliverable/linux.git] / drivers / pci / pcie / portdrv_pci.c

/*
 * File:	portdrv_pci.c
 * Purpose:	PCI Express Port Bus Driver
 *
 * Copyright (C) 2004 Intel
 * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
 */

#include <linux/module.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/pm.h>
#include <linux/init.h>
#include <linux/pcieport_if.h>
#include <linux/aer.h>
#include <linux/dmi.h>
#include <linux/pci-aspm.h>

#include "portdrv.h"
#include "aer/aerdrv.h"

/*
 * Version Information
 */
#define DRIVER_VERSION "v1.0"
#define DRIVER_AUTHOR "tom.l.nguyen@intel.com"
#define DRIVER_DESC "PCIe Port Bus Driver"
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/* If this switch is set, PCIe port native services should not be enabled. */
bool pcie_ports_disabled;

/*
 * If this switch is set, ACPI _OSC will be used to determine whether or not to
 * enable PCIe port native services.
 */
bool pcie_ports_auto = true;

static int __init pcie_port_setup(char *str)
{
	if (!strncmp(str, "compat", 6)) {
		pcie_ports_disabled = true;
	} else if (!strncmp(str, "native", 6)) {
		pcie_ports_disabled = false;
		pcie_ports_auto = false;
	} else if (!strncmp(str, "auto", 4)) {
		pcie_ports_disabled = false;
		pcie_ports_auto = true;
	}

	return 1;
}
__setup("pcie_ports=", pcie_port_setup);

/* global data */

/**
 * pcie_clear_root_pme_status - Clear root port PME interrupt status.
 * @dev: PCIe root port or event collector.
 */
void pcie_clear_root_pme_status(struct pci_dev *dev)
{
	int rtsta_pos;
	u32 rtsta;

	rtsta_pos = pci_pcie_cap(dev) + PCI_EXP_RTSTA;

	pci_read_config_dword(dev, rtsta_pos, &rtsta);
	rtsta |= PCI_EXP_RTSTA_PME;
	pci_write_config_dword(dev, rtsta_pos, rtsta);
}

static int pcie_portdrv_restore_config(struct pci_dev *dev)
{
	int retval;

	retval = pci_enable_device(dev);
	if (retval)
		return retval;
	pci_set_master(dev);
	return 0;
}

#ifdef CONFIG_PM
static int pcie_port_resume_noirq(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);

	/*
	 * Some BIOSes forget to clear Root PME Status bits after system wakeup
	 * which breaks ACPI-based runtime wakeup on PCI Express, so clear those
	 * bits now just in case (shouldn't hurt).
	 */
	if(pdev->pcie_type == PCI_EXP_TYPE_ROOT_PORT)
		pcie_clear_root_pme_status(pdev);
	return 0;
}

static const struct dev_pm_ops pcie_portdrv_pm_ops = {
	.suspend	= pcie_port_device_suspend,
	.resume		= pcie_port_device_resume,
	.freeze		= pcie_port_device_suspend,
	.thaw		= pcie_port_device_resume,
	.poweroff	= pcie_port_device_suspend,
	.restore	= pcie_port_device_resume,
	.resume_noirq	= pcie_port_resume_noirq,
};

#define PCIE_PORTDRV_PM_OPS	(&pcie_portdrv_pm_ops)

#else /* !PM */

#define PCIE_PORTDRV_PM_OPS	NULL
#endif /* !PM */

/*
 * pcie_portdrv_probe - Probe PCI-Express port devices
 * @dev: PCI-Express port device being probed
 *
 * If detected invokes the pcie_port_device_register() method for
 * this port device.
 *
 */
static int __devinit pcie_portdrv_probe(struct pci_dev *dev,
					const struct pci_device_id *id)
{
	int status;

	if (!pci_is_pcie(dev) ||
	    ((dev->pcie_type != PCI_EXP_TYPE_ROOT_PORT) &&
	     (dev->pcie_type != PCI_EXP_TYPE_UPSTREAM) &&
	     (dev->pcie_type != PCI_EXP_TYPE_DOWNSTREAM)))
		return -ENODEV;

	if (!dev->irq && dev->pin) {
		dev_warn(&dev->dev, "device [%04x:%04x] has invalid IRQ; "
			 "check vendor BIOS\n", dev->vendor, dev->device);
	}
	status = pcie_port_device_register(dev);
	if (status)
		return status;

	pci_save_state(dev);

	return 0;
}

static void pcie_portdrv_remove(struct pci_dev *dev)
{
	pcie_port_device_remove(dev);
	pci_disable_device(dev);
}

static int error_detected_iter(struct device *device, void *data)
{
	struct pcie_device *pcie_device;
	struct pcie_port_service_driver *driver;
	struct aer_broadcast_data *result_data;
	pci_ers_result_t status;

	result_data = (struct aer_broadcast_data *) data;

	if (device->bus == &pcie_port_bus_type && device->driver) {
		driver = to_service_driver(device->driver);
		if (!driver ||
			!driver->err_handler ||
			!driver->err_handler->error_detected)
			return 0;

		pcie_device = to_pcie_device(device);

		/* Forward error detected message to service drivers */
		status = driver->err_handler->error_detected(
			pcie_device->port,
			result_data->state);
		result_data->result =
			merge_result(result_data->result, status);
	}

	return 0;
}

static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev,
					enum pci_channel_state error)
{
	struct aer_broadcast_data data = {error, PCI_ERS_RESULT_CAN_RECOVER};
	int ret;

	/* can not fail */
	ret = device_for_each_child(&dev->dev, &data, error_detected_iter);

	return data.result;
}

static int mmio_enabled_iter(struct device *device, void *data)
{
	struct pcie_device *pcie_device;
	struct pcie_port_service_driver *driver;
	pci_ers_result_t status, *result;

	result = (pci_ers_result_t *) data;

	if (device->bus == &pcie_port_bus_type && device->driver) {
		driver = to_service_driver(device->driver);
		if (driver &&
			driver->err_handler &&
			driver->err_handler->mmio_enabled) {
			pcie_device = to_pcie_device(device);

			/* Forward error message to service drivers */
			status = driver->err_handler->mmio_enabled(
					pcie_device->port);
			*result = merge_result(*result, status);
		}
	}

	return 0;
}

static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev)
{
	pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
	int retval;

	/* get true return value from &status */
	retval = device_for_each_child(&dev->dev, &status, mmio_enabled_iter);
	return status;
}

static int slot_reset_iter(struct device *device, void *data)
{
	struct pcie_device *pcie_device;
	struct pcie_port_service_driver *driver;
	pci_ers_result_t status, *result;

	result = (pci_ers_result_t *) data;

	if (device->bus == &pcie_port_bus_type && device->driver) {
		driver = to_service_driver(device->driver);
		if (driver &&
			driver->err_handler &&
			driver->err_handler->slot_reset) {
			pcie_device = to_pcie_device(device);

			/* Forward error message to service drivers */
			status = driver->err_handler->slot_reset(
					pcie_device->port);
			*result = merge_result(*result, status);
		}
	}

	return 0;
}

static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
{
	pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
	int retval;

	/* If fatal, restore cfg space for possible link reset at upstream */
	if (dev->error_state == pci_channel_io_frozen) {
		dev->state_saved = true;
		pci_restore_state(dev);
		pcie_portdrv_restore_config(dev);
		pci_enable_pcie_error_reporting(dev);
	}

	/* get true return value from &status */
	retval = device_for_each_child(&dev->dev, &status, slot_reset_iter);

	return status;
}

static int resume_iter(struct device *device, void *data)
{
	struct pcie_device *pcie_device;
	struct pcie_port_service_driver *driver;

	if (device->bus == &pcie_port_bus_type && device->driver) {
		driver = to_service_driver(device->driver);
		if (driver &&
			driver->err_handler &&
			driver->err_handler->resume) {
			pcie_device = to_pcie_device(device);

			/* Forward error message to service drivers */
			driver->err_handler->resume(pcie_device->port);
		}
	}

	return 0;
}

static void pcie_portdrv_err_resume(struct pci_dev *dev)
{
	int retval;
	/* nothing to do with error value, if it ever happens */
	retval = device_for_each_child(&dev->dev, NULL, resume_iter);
}

/*
 * LINUX Device Driver Model
 */
static const struct pci_device_id port_pci_ids[] = { {
	/* handle any PCI-Express port */
	PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0),
	}, { /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, port_pci_ids);

static struct pci_error_handlers pcie_portdrv_err_handler = {
		.error_detected = pcie_portdrv_error_detected,
		.mmio_enabled = pcie_portdrv_mmio_enabled,
		.slot_reset = pcie_portdrv_slot_reset,
		.resume = pcie_portdrv_err_resume,
};

static struct pci_driver pcie_portdriver = {
	.name		= "pcieport",
	.id_table	= &port_pci_ids[0],

	.probe		= pcie_portdrv_probe,
	.remove		= pcie_portdrv_remove,

	.err_handler 	= &pcie_portdrv_err_handler,

	.driver.pm 	= PCIE_PORTDRV_PM_OPS,
};

static int __init dmi_pcie_pme_disable_msi(const struct dmi_system_id *d)
{
	pr_notice("%s detected: will not use MSI for PCIe PME signaling\n",
			d->ident);
	pcie_pme_disable_msi();
	return 0;
}

static struct dmi_system_id __initdata pcie_portdrv_dmi_table[] = {
	/*
	 * Boxes that should not use MSI for PCIe PME signaling.
	 */
	{
	 .callback = dmi_pcie_pme_disable_msi,
	 .ident = "MSI Wind U-100",
	 .matches = {
		     DMI_MATCH(DMI_SYS_VENDOR,
		     		"MICRO-STAR INTERNATIONAL CO., LTD"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "U-100"),
		     },
	 },
	 {}
};

static int __init pcie_portdrv_init(void)
{
	int retval;

	if (pcie_ports_disabled)
		return pci_register_driver(&pcie_portdriver);

	dmi_check_system(pcie_portdrv_dmi_table);

	retval = pcie_port_bus_register();
	if (retval) {
		printk(KERN_WARNING "PCIE: bus_register error: %d\n", retval);
		goto out;
	}
	retval = pci_register_driver(&pcie_portdriver);
	if (retval)
		pcie_port_bus_unregister();
 out:
	return retval;
}

module_init(pcie_portdrv_init);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* File: portdrv_pci.c
	3	* Purpose: PCI Express Port Bus Driver
	4	*
	5	* Copyright (C) 2004 Intel
	6	* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
	7	*/
	8
	9	#include <linux/module.h>
	10	#include <linux/pci.h>
	11	#include <linux/kernel.h>
	12	#include <linux/errno.h>
	13	#include <linux/pm.h>
	14	#include <linux/init.h>
	15	#include <linux/pcieport_if.h>
4bf3392e	16	#include <linux/aer.h>
c39fae14	17	#include <linux/dmi.h>
28eb5f27	18	#include <linux/pci-aspm.h>
1da177e4 LT	19
1da177e4 LT	20	#include "portdrv.h"
4bf3392e	21	#include "aer/aerdrv.h"
1da177e4 LT	22
	23	/*
	24	* Version Information
	25	*/
	26	#define DRIVER_VERSION "v1.0"
	27	#define DRIVER_AUTHOR "tom.l.nguyen@intel.com"
7e8af37a	28	#define DRIVER_DESC "PCIe Port Bus Driver"
1da177e4 LT	29	MODULE_AUTHOR(DRIVER_AUTHOR);
	30	MODULE_DESCRIPTION(DRIVER_DESC);
	31	MODULE_LICENSE("GPL");
	32
79dd9182 RW	33	/* If this switch is set, PCIe port native services should not be enabled. */
	34	bool pcie_ports_disabled;
	35
28eb5f27 RW	36	/*
	37	* If this switch is set, ACPI _OSC will be used to determine whether or not to
	38	* enable PCIe port native services.
	39	*/
	40	bool pcie_ports_auto = true;
	41
79dd9182 RW	42	static int __init pcie_port_setup(char *str)
79dd9182 RW	43	{
28eb5f27	44	if (!strncmp(str, "compat", 6)) {
79dd9182	45	pcie_ports_disabled = true;
28eb5f27 RW	46	} else if (!strncmp(str, "native", 6)) {
	47	pcie_ports_disabled = false;
	48	pcie_ports_auto = false;
	49	} else if (!strncmp(str, "auto", 4)) {
	50	pcie_ports_disabled = false;
	51	pcie_ports_auto = true;
	52	}
79dd9182 RW	53
	54	return 1;
	55	}
	56	__setup("pcie_ports=", pcie_port_setup);
	57
1da177e4	58	/* global data */
1da177e4	59
fe31e697 RW	60	/**
	61	* pcie_clear_root_pme_status - Clear root port PME interrupt status.
	62	* @dev: PCIe root port or event collector.
	63	*/
	64	void pcie_clear_root_pme_status(struct pci_dev *dev)
	65	{
	66	int rtsta_pos;
	67	u32 rtsta;
	68
	69	rtsta_pos = pci_pcie_cap(dev) + PCI_EXP_RTSTA;
	70
	71	pci_read_config_dword(dev, rtsta_pos, &rtsta);
	72	rtsta \|= PCI_EXP_RTSTA_PME;
	73	pci_write_config_dword(dev, rtsta_pos, rtsta);
	74	}
	75
4bf3392e ZY	76	static int pcie_portdrv_restore_config(struct pci_dev *dev)
	77	{
	78	int retval;
	79
4bf3392e ZY	80	retval = pci_enable_device(dev);
	81	if (retval)
	82	return retval;
	83	pci_set_master(dev);
	84	return 0;
	85	}
	86
0bed208e	87	#ifdef CONFIG_PM
fe31e697 RW	88	static int pcie_port_resume_noirq(struct device *dev)
	89	{
	90	struct pci_dev *pdev = to_pci_dev(dev);
	91
	92	/*
	93	* Some BIOSes forget to clear Root PME Status bits after system wakeup
	94	* which breaks ACPI-based runtime wakeup on PCI Express, so clear those
	95	* bits now just in case (shouldn't hurt).
	96	*/
	97	if(pdev->pcie_type == PCI_EXP_TYPE_ROOT_PORT)
	98	pcie_clear_root_pme_status(pdev);
	99	return 0;
	100	}
	101
47145210	102	static const struct dev_pm_ops pcie_portdrv_pm_ops = {
3a3c244c RW	103	.suspend = pcie_port_device_suspend,
	104	.resume = pcie_port_device_resume,
	105	.freeze = pcie_port_device_suspend,
	106	.thaw = pcie_port_device_resume,
	107	.poweroff = pcie_port_device_suspend,
	108	.restore = pcie_port_device_resume,
fe31e697	109	.resume_noirq = pcie_port_resume_noirq,
3a3c244c	110	};
4bf3392e	111
3a3c244c	112	#define PCIE_PORTDRV_PM_OPS (&pcie_portdrv_pm_ops)
a79d682f	113
3a3c244c RW	114	#else /* !PM */
	115
	116	#define PCIE_PORTDRV_PM_OPS NULL
	117	#endif /* !PM */
4bf3392e	118
1da177e4 LT	119	/*
	120	* pcie_portdrv_probe - Probe PCI-Express port devices
	121	* @dev: PCI-Express port device being probed
	122	*
40da4186	123	* If detected invokes the pcie_port_device_register() method for
1da177e4 LT	124	* this port device.
	125	*
	126	*/
898294c9 KK	127	static int __devinit pcie_portdrv_probe(struct pci_dev *dev,
898294c9 KK	128	const struct pci_device_id *id)
1da177e4	129	{
898294c9	130	int status;
1da177e4	131
898294c9 KK	132	if (!pci_is_pcie(dev) \|\|
	133	((dev->pcie_type != PCI_EXP_TYPE_ROOT_PORT) &&
	134	(dev->pcie_type != PCI_EXP_TYPE_UPSTREAM) &&
	135	(dev->pcie_type != PCI_EXP_TYPE_DOWNSTREAM)))
	136	return -ENODEV;
1da177e4	137
40da4186	138	if (!dev->irq && dev->pin) {
34a2e15e	139	dev_warn(&dev->dev, "device [%04x:%04x] has invalid IRQ; "
34438ba6	140	"check vendor BIOS\n", dev->vendor, dev->device);
1da177e4	141	}
f118c0c3 RW	142	status = pcie_port_device_register(dev);
	143	if (status)
	144	return status;
1da177e4	145
87d2e2ec	146	pci_save_state(dev);
4bf3392e	147
1da177e4 LT	148	return 0;
	149	}
	150
40da4186	151	static void pcie_portdrv_remove(struct pci_dev *dev)
1da177e4 LT	152	{
1da177e4 LT	153	pcie_port_device_remove(dev);
d8998719	154	pci_disable_device(dev);
1da177e4 LT	155	}
1da177e4 LT	156
4bf3392e	157	static int error_detected_iter(struct device device, void data)
60854838	158	{
4bf3392e ZY	159	struct pcie_device *pcie_device;
	160	struct pcie_port_service_driver *driver;
	161	struct aer_broadcast_data *result_data;
	162	pci_ers_result_t status;
	163
	164	result_data = (struct aer_broadcast_data *) data;
	165
	166	if (device->bus == &pcie_port_bus_type && device->driver) {
	167	driver = to_service_driver(device->driver);
	168	if (!driver \|\|
	169	!driver->err_handler \|\|
	170	!driver->err_handler->error_detected)
	171	return 0;
	172
	173	pcie_device = to_pcie_device(device);
	174
	175	/* Forward error detected message to service drivers */
	176	status = driver->err_handler->error_detected(
	177	pcie_device->port,
	178	result_data->state);
	179	result_data->result =
	180	merge_result(result_data->result, status);
	181	}
	182
	183	return 0;
60854838 HK	184	}
60854838 HK	185
4bf3392e ZY	186	static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev,
4bf3392e ZY	187	enum pci_channel_state error)
60854838	188	{
40da4186 HS	189	struct aer_broadcast_data data = {error, PCI_ERS_RESULT_CAN_RECOVER};
40da4186 HS	190	int ret;
4bf3392e	191
b19441af	192	/* can not fail */
40da4186	193	ret = device_for_each_child(&dev->dev, &data, error_detected_iter);
4bf3392e	194
40da4186	195	return data.result;
4bf3392e ZY	196	}
	197
	198	static int mmio_enabled_iter(struct device device, void data)
	199	{
	200	struct pcie_device *pcie_device;
	201	struct pcie_port_service_driver *driver;
	202	pci_ers_result_t status, *result;
	203
	204	result = (pci_ers_result_t *) data;
	205
	206	if (device->bus == &pcie_port_bus_type && device->driver) {
	207	driver = to_service_driver(device->driver);
	208	if (driver &&
	209	driver->err_handler &&
	210	driver->err_handler->mmio_enabled) {
	211	pcie_device = to_pcie_device(device);
	212
	213	/* Forward error message to service drivers */
	214	status = driver->err_handler->mmio_enabled(
	215	pcie_device->port);
	216	result = merge_result(result, status);
	217	}
	218	}
60854838	219
60854838 HK	220	return 0;
	221	}
	222
4bf3392e	223	static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev)
1da177e4	224	{
4bf3392e	225	pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
b19441af	226	int retval;
5823d100	227
b19441af GKH	228	/* get true return value from &status */
b19441af GKH	229	retval = device_for_each_child(&dev->dev, &status, mmio_enabled_iter);
4bf3392e	230	return status;
1da177e4 LT	231	}
1da177e4 LT	232
4bf3392e	233	static int slot_reset_iter(struct device device, void data)
1da177e4	234	{
4bf3392e ZY	235	struct pcie_device *pcie_device;
	236	struct pcie_port_service_driver *driver;
	237	pci_ers_result_t status, *result;
	238
	239	result = (pci_ers_result_t *) data;
	240
	241	if (device->bus == &pcie_port_bus_type && device->driver) {
	242	driver = to_service_driver(device->driver);
	243	if (driver &&
	244	driver->err_handler &&
	245	driver->err_handler->slot_reset) {
	246	pcie_device = to_pcie_device(device);
	247
	248	/* Forward error message to service drivers */
	249	status = driver->err_handler->slot_reset(
	250	pcie_device->port);
	251	result = merge_result(result, status);
	252	}
	253	}
	254
	255	return 0;
	256	}
	257
	258	static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
	259	{
029091df	260	pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
b19441af	261	int retval;
4bf3392e ZY	262
	263	/* If fatal, restore cfg space for possible link reset at upstream */
	264	if (dev->error_state == pci_channel_io_frozen) {
e9d82888	265	dev->state_saved = true;
a79d682f	266	pci_restore_state(dev);
4bf3392e ZY	267	pcie_portdrv_restore_config(dev);
	268	pci_enable_pcie_error_reporting(dev);
	269	}
	270
b19441af GKH	271	/* get true return value from &status */
b19441af GKH	272	retval = device_for_each_child(&dev->dev, &status, slot_reset_iter);
4bf3392e ZY	273
	274	return status;
	275	}
	276
	277	static int resume_iter(struct device device, void data)
	278	{
	279	struct pcie_device *pcie_device;
	280	struct pcie_port_service_driver *driver;
	281
	282	if (device->bus == &pcie_port_bus_type && device->driver) {
	283	driver = to_service_driver(device->driver);
	284	if (driver &&
	285	driver->err_handler &&
	286	driver->err_handler->resume) {
	287	pcie_device = to_pcie_device(device);
	288
	289	/* Forward error message to service drivers */
	290	driver->err_handler->resume(pcie_device->port);
	291	}
	292	}
	293
	294	return 0;
	295	}
	296
	297	static void pcie_portdrv_err_resume(struct pci_dev *dev)
	298	{
b19441af GKH	299	int retval;
	300	/* nothing to do with error value, if it ever happens */
	301	retval = device_for_each_child(&dev->dev, NULL, resume_iter);
1da177e4	302	}
1da177e4 LT	303
	304	/*
	305	* LINUX Device Driver Model
	306	*/
	307	static const struct pci_device_id port_pci_ids[] = { {
	308	/* handle any PCI-Express port */
	309	PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) \| 0x00), ~0),
	310	}, { /* end: all zeroes */ }
	311	};
	312	MODULE_DEVICE_TABLE(pci, port_pci_ids);
	313
4bf3392e ZY	314	static struct pci_error_handlers pcie_portdrv_err_handler = {
	315	.error_detected = pcie_portdrv_error_detected,
	316	.mmio_enabled = pcie_portdrv_mmio_enabled,
	317	.slot_reset = pcie_portdrv_slot_reset,
	318	.resume = pcie_portdrv_err_resume,
	319	};
	320
3603a6a3	321	static struct pci_driver pcie_portdriver = {
e3fb20f9	322	.name = "pcieport",
1da177e4 LT	323	.id_table = &port_pci_ids[0],
	324
	325	.probe = pcie_portdrv_probe,
	326	.remove = pcie_portdrv_remove,
	327
4bf3392e	328	.err_handler = &pcie_portdrv_err_handler,
3a3c244c RW	329
3a3c244c RW	330	.driver.pm = PCIE_PORTDRV_PM_OPS,
1da177e4 LT	331	};
1da177e4 LT	332
c39fae14 RW	333	static int __init dmi_pcie_pme_disable_msi(const struct dmi_system_id *d)
	334	{
	335	pr_notice("%s detected: will not use MSI for PCIe PME signaling\n",
	336	d->ident);
	337	pcie_pme_disable_msi();
	338	return 0;
	339	}
	340
	341	static struct dmi_system_id __initdata pcie_portdrv_dmi_table[] = {
	342	/*
	343	* Boxes that should not use MSI for PCIe PME signaling.
	344	*/
	345	{
	346	.callback = dmi_pcie_pme_disable_msi,
	347	.ident = "MSI Wind U-100",
	348	.matches = {
	349	DMI_MATCH(DMI_SYS_VENDOR,
	350	"MICRO-STAR INTERNATIONAL CO., LTD"),
	351	DMI_MATCH(DMI_PRODUCT_NAME, "U-100"),
	352	},
	353	},
	354	{}
	355	};
	356
1da177e4 LT	357	static int __init pcie_portdrv_init(void)
1da177e4 LT	358	{
20d51660	359	int retval;
1da177e4	360
fe31e697 RW	361	if (pcie_ports_disabled)
fe31e697 RW	362	return pci_register_driver(&pcie_portdriver);
79dd9182	363
c39fae14 RW	364	dmi_check_system(pcie_portdrv_dmi_table);
c39fae14 RW	365
20d51660 RD	366	retval = pcie_port_bus_register();
	367	if (retval) {
	368	printk(KERN_WARNING "PCIE: bus_register error: %d\n", retval);
	369	goto out;
	370	}
3603a6a3	371	retval = pci_register_driver(&pcie_portdriver);
1da177e4 LT	372	if (retval)
1da177e4 LT	373	pcie_port_bus_unregister();
20d51660	374	out:
1da177e4 LT	375	return retval;
	376	}
	377
1da177e4	378	module_init(pcie_portdrv_init);