[mirror_ubuntu-artful-kernel.git] / arch / x86 / pci / acpi.c

#include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/dmi.h>
#include <linux/slab.h>
#include <linux/pci-acpi.h>
#include <asm/numa.h>
#include <asm/pci_x86.h>

struct pci_root_info {
	struct acpi_pci_root_info common;
	struct pci_sysdata sd;
#ifdef	CONFIG_PCI_MMCONFIG
	bool mcfg_added;
	u8 start_bus;
	u8 end_bus;
#endif
};

static bool pci_use_crs = true;
static bool pci_ignore_seg = false;

static int __init set_use_crs(const struct dmi_system_id *id)
{
	pci_use_crs = true;
	return 0;
}

static int __init set_nouse_crs(const struct dmi_system_id *id)
{
	pci_use_crs = false;
	return 0;
}

static int __init set_ignore_seg(const struct dmi_system_id *id)
{
	printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);
	pci_ignore_seg = true;
	return 0;
}

static const struct dmi_system_id pci_crs_quirks[] __initconst = {
	/* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
	{
		.callback = set_use_crs,
		.ident = "IBM System x3800",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
			DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
		},
	},
	/* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
	/* 2006 AMD HT/VIA system with two host bridges */
        {
		.callback = set_use_crs,
		.ident = "ASRock ALiveSATA2-GLAN",
		.matches = {
			DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
                },
        },
	/* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
	/* 2006 AMD HT/VIA system with two host bridges */
	{
		.callback = set_use_crs,
		.ident = "ASUS M2V-MX SE",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
			DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
			DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
		},
	},
	/* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
	{
		.callback = set_use_crs,
		.ident = "MSI MS-7253",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
			DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
			DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
		},
	},
	/* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/931368 */
	/* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033299 */
	{
		.callback = set_use_crs,
		.ident = "Foxconn K8M890-8237A",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "Foxconn"),
			DMI_MATCH(DMI_BOARD_NAME, "K8M890-8237A"),
			DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
		},
	},

	/* Now for the blacklist.. */

	/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
	{
		.callback = set_nouse_crs,
		.ident = "Dell Studio 1557",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
			DMI_MATCH(DMI_BIOS_VERSION, "A09"),
		},
	},
	/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
	{
		.callback = set_nouse_crs,
		.ident = "Thinkpad SL510",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
			DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
			DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
		},
	},

	/* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */
	{
		.callback = set_ignore_seg,
		.ident = "HP xw9300",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
			DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"),
		},
	},
	{}
};

void __init pci_acpi_crs_quirks(void)
{
	int year;

	if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) {
		if (iomem_resource.end <= 0xffffffff)
			pci_use_crs = false;
	}

	dmi_check_system(pci_crs_quirks);

	/*
	 * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
	 * takes precedence over anything we figured out above.
	 */
	if (pci_probe & PCI_ROOT_NO_CRS)
		pci_use_crs = false;
	else if (pci_probe & PCI_USE__CRS)
		pci_use_crs = true;

	printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
	       "if necessary, use \"pci=%s\" and report a bug\n",
	       pci_use_crs ? "Using" : "Ignoring",
	       pci_use_crs ? "nocrs" : "use_crs");
}

#ifdef	CONFIG_PCI_MMCONFIG
static int check_segment(u16 seg, struct device *dev, char *estr)
{
	if (seg) {
		dev_err(dev,
			"%s can't access PCI configuration "
			"space under this host bridge.\n",
			estr);
		return -EIO;
	}

	/*
	 * Failure in adding MMCFG information is not fatal,
	 * just can't access extended configuration space of
	 * devices under this host bridge.
	 */
	dev_warn(dev,
		 "%s can't access extended PCI configuration "
		 "space under this bridge.\n",
		 estr);

	return 0;
}

static int setup_mcfg_map(struct acpi_pci_root_info *ci)
{
	int result, seg;
	struct pci_root_info *info;
	struct acpi_pci_root *root = ci->root;
	struct device *dev = &ci->bridge->dev;

	info = container_of(ci, struct pci_root_info, common);
	info->start_bus = (u8)root->secondary.start;
	info->end_bus = (u8)root->secondary.end;
	info->mcfg_added = false;
	seg = info->sd.domain;

	/* return success if MMCFG is not in use */
	if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg)
		return 0;

	if (!(pci_probe & PCI_PROBE_MMCONF))
		return check_segment(seg, dev, "MMCONFIG is disabled,");

	result = pci_mmconfig_insert(dev, seg, info->start_bus, info->end_bus,
				     root->mcfg_addr);
	if (result == 0) {
		/* enable MMCFG if it hasn't been enabled yet */
		if (raw_pci_ext_ops == NULL)
			raw_pci_ext_ops = &pci_mmcfg;
		info->mcfg_added = true;
	} else if (result != -EEXIST)
		return check_segment(seg, dev,
			 "fail to add MMCONFIG information,");

	return 0;
}

static void teardown_mcfg_map(struct acpi_pci_root_info *ci)
{
	struct pci_root_info *info;

	info = container_of(ci, struct pci_root_info, common);
	if (info->mcfg_added) {
		pci_mmconfig_delete(info->sd.domain,
				    info->start_bus, info->end_bus);
		info->mcfg_added = false;
	}
}
#else
static int setup_mcfg_map(struct acpi_pci_root_info *ci)
{
	return 0;
}

static void teardown_mcfg_map(struct acpi_pci_root_info *ci)
{
}
#endif

static int pci_acpi_root_get_node(struct acpi_pci_root *root)
{
	int busnum = root->secondary.start;
	struct acpi_device *device = root->device;
	int node = acpi_get_node(device->handle);

	if (node == NUMA_NO_NODE) {
		node = x86_pci_root_bus_node(busnum);
		if (node != 0 && node != NUMA_NO_NODE)
			dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n",
				node);
	}
	if (node != NUMA_NO_NODE && !node_online(node))
		node = NUMA_NO_NODE;

	return node;
}

static int pci_acpi_root_init_info(struct acpi_pci_root_info *ci)
{
	return setup_mcfg_map(ci);
}

static void pci_acpi_root_release_info(struct acpi_pci_root_info *ci)
{
	teardown_mcfg_map(ci);
	kfree(container_of(ci, struct pci_root_info, common));
}

/*
 * An IO port or MMIO resource assigned to a PCI host bridge may be
 * consumed by the host bridge itself or available to its child
 * bus/devices. The ACPI specification defines a bit (Producer/Consumer)
 * to tell whether the resource is consumed by the host bridge itself,
 * but firmware hasn't used that bit consistently, so we can't rely on it.
 *
 * On x86 and IA64 platforms, all IO port and MMIO resources are assumed
 * to be available to child bus/devices except one special case:
 *     IO port [0xCF8-0xCFF] is consumed by the host bridge itself
 *     to access PCI configuration space.
 *
 * So explicitly filter out PCI CFG IO ports[0xCF8-0xCFF].
 */
static bool resource_is_pcicfg_ioport(struct resource *res)
{
	return (res->flags & IORESOURCE_IO) &&
		res->start == 0xCF8 && res->end == 0xCFF;
}

static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci)
{
	struct acpi_device *device = ci->bridge;
	int busnum = ci->root->secondary.start;
	struct resource_entry *entry, *tmp;
	int status;

	status = acpi_pci_probe_root_resources(ci);
	if (pci_use_crs) {
		resource_list_for_each_entry_safe(entry, tmp, &ci->resources)
			if (resource_is_pcicfg_ioport(entry->res))
				resource_list_destroy_entry(entry);
		return status;
	}

	resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
		dev_printk(KERN_DEBUG, &device->dev,
			   "host bridge window %pR (ignored)\n", entry->res);
		resource_list_destroy_entry(entry);
	}
	x86_pci_root_bus_resources(busnum, &ci->resources);

	return 0;
}

static struct acpi_pci_root_ops acpi_pci_root_ops = {
	.pci_ops = &pci_root_ops,
	.init_info = pci_acpi_root_init_info,
	.release_info = pci_acpi_root_release_info,
	.prepare_resources = pci_acpi_root_prepare_resources,
};

struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
	int domain = root->segment;
	int busnum = root->secondary.start;
	int node = pci_acpi_root_get_node(root);
	struct pci_bus *bus;

	if (pci_ignore_seg)
		root->segment = domain = 0;

	if (domain && !pci_domains_supported) {
		printk(KERN_WARNING "pci_bus %04x:%02x: "
		       "ignored (multiple domains not supported)\n",
		       domain, busnum);
		return NULL;
	}

	bus = pci_find_bus(domain, busnum);
	if (bus) {
		/*
		 * If the desired bus has been scanned already, replace
		 * its bus->sysdata.
		 */
		struct pci_sysdata sd = {
			.domain = domain,
			.node = node,
			.companion = root->device
		};

		memcpy(bus->sysdata, &sd, sizeof(sd));
	} else {
		struct pci_root_info *info;

		info = kzalloc_node(sizeof(*info), GFP_KERNEL, node);
		if (!info)
			dev_err(&root->device->dev,
				"pci_bus %04x:%02x: ignored (out of memory)\n",
				domain, busnum);
		else {
			info->sd.domain = domain;
			info->sd.node = node;
			info->sd.companion = root->device;
			bus = acpi_pci_root_create(root, &acpi_pci_root_ops,
						   &info->common, &info->sd);
		}
	}

	/* After the PCI-E bus has been walked and all devices discovered,
	 * configure any settings of the fabric that might be necessary.
	 */
	if (bus) {
		struct pci_bus *child;
		list_for_each_entry(child, &bus->children, node)
			pcie_bus_configure_settings(child);
	}

	return bus;
}

int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
{
	/*
	 * We pass NULL as parent to pci_create_root_bus(), so if it is not NULL
	 * here, pci_create_root_bus() has been called by someone else and
	 * sysdata is likely to be different from what we expect.  Let it go in
	 * that case.
	 */
	if (!bridge->dev.parent) {
		struct pci_sysdata *sd = bridge->bus->sysdata;
		ACPI_COMPANION_SET(&bridge->dev, sd->companion);
	}
	return 0;
}

int __init pci_acpi_init(void)
{
	struct pci_dev *dev = NULL;

	if (acpi_noirq)
		return -ENODEV;

	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
	pcibios_enable_irq = acpi_pci_irq_enable;
	pcibios_disable_irq = acpi_pci_irq_disable;
	x86_init.pci.init_irq = x86_init_noop;

	if (pci_routeirq) {
		/*
		 * PCI IRQ routing is set up by pci_enable_device(), but we
		 * also do it here in case there are still broken drivers that
		 * don't use pci_enable_device().
		 */
		printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
		for_each_pci_dev(dev)
			acpi_pci_irq_enable(dev);
	}

	return 0;
}
Commit	Line	Data
1da177e4 LT	1	#include <linux/pci.h>
	2	#include <linux/acpi.h>
	3	#include <linux/init.h>
b33fa1f3	4	#include <linux/irq.h>
036fff4c	5	#include <linux/dmi.h>
5a0e3ad6	6	#include <linux/slab.h>
4d6b4e69	7	#include <linux/pci-acpi.h>
69e1a33f	8	#include <asm/numa.h>
82487711	9	#include <asm/pci_x86.h>
1da177e4	10
62f420f8	11	struct pci_root_info {
4d6b4e69	12	struct acpi_pci_root_info common;
35cb05e5	13	struct pci_sysdata sd;
c0fa4078 JL	14	#ifdef CONFIG_PCI_MMCONFIG
c0fa4078 JL	15	bool mcfg_added;
c0fa4078 JL	16	u8 start_bus;
	17	u8 end_bus;
	18	#endif
62f420f8 GH	19	};
62f420f8 GH	20
7bc5e3f2	21	static bool pci_use_crs = true;
1f09b09b	22	static bool pci_ignore_seg = false;
7bc5e3f2 BH	23
	24	static int __init set_use_crs(const struct dmi_system_id *id)
	25	{
	26	pci_use_crs = true;
	27	return 0;
	28	}
	29
28c3c05d DJ	30	static int __init set_nouse_crs(const struct dmi_system_id *id)
	31	{
	32	pci_use_crs = false;
	33	return 0;
	34	}
	35
1f09b09b BH	36	static int __init set_ignore_seg(const struct dmi_system_id *id)
	37	{
	38	printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);
	39	pci_ignore_seg = true;
	40	return 0;
	41	}
	42
	43	static const struct dmi_system_id pci_crs_quirks[] __initconst = {
7bc5e3f2 BH	44	/* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
	45	{
	46	.callback = set_use_crs,
	47	.ident = "IBM System x3800",
	48	.matches = {
	49	DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
	50	DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
	51	},
	52	},
2491762c BH	53	/* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
	54	/* 2006 AMD HT/VIA system with two host bridges */
	55	{
	56	.callback = set_use_crs,
	57	.ident = "ASRock ALiveSATA2-GLAN",
	58	.matches = {
	59	DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
	60	},
	61	},
29cf7a30 PM	62	/* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
	63	/* 2006 AMD HT/VIA system with two host bridges */
	64	{
	65	.callback = set_use_crs,
	66	.ident = "ASUS M2V-MX SE",
	67	.matches = {
	68	DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
	69	DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
	70	DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
	71	},
	72	},
84113717 JN	73	/* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
	74	{
	75	.callback = set_use_crs,
	76	.ident = "MSI MS-7253",
	77	.matches = {
	78	DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
	79	DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
	80	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
84113717 JN	81	},
84113717 JN	82	},
1dace011 BH	83	/* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/931368 */
	84	/* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033299 */
	85	{
	86	.callback = set_use_crs,
	87	.ident = "Foxconn K8M890-8237A",
	88	.matches = {
	89	DMI_MATCH(DMI_BOARD_VENDOR, "Foxconn"),
	90	DMI_MATCH(DMI_BOARD_NAME, "K8M890-8237A"),
	91	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
	92	},
	93	},
28c3c05d	94
e702781f DJ	95	/* Now for the blacklist.. */
	96
	97	/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
	98	{
	99	.callback = set_nouse_crs,
	100	.ident = "Dell Studio 1557",
	101	.matches = {
	102	DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
	103	DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
	104	DMI_MATCH(DMI_BIOS_VERSION, "A09"),
	105	},
	106	},
8b6a5af9 DJ	107	/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
	108	{
	109	.callback = set_nouse_crs,
	110	.ident = "Thinkpad SL510",
	111	.matches = {
	112	DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
	113	DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
	114	DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
	115	},
	116	},
1f09b09b BH	117
	118	/* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */
	119	{
	120	.callback = set_ignore_seg,
	121	.ident = "HP xw9300",
	122	.matches = {
	123	DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
	124	DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"),
	125	},
	126	},
7bc5e3f2 BH	127	{}
	128	};
	129
	130	void __init pci_acpi_crs_quirks(void)
	131	{
	132	int year;
	133
3d9fecf6 BH	134	if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) {
	135	if (iomem_resource.end <= 0xffffffff)
	136	pci_use_crs = false;
	137	}
7bc5e3f2	138
1f09b09b	139	dmi_check_system(pci_crs_quirks);
7bc5e3f2 BH	140
	141	/*
	142	* If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
	143	* takes precedence over anything we figured out above.
	144	*/
	145	if (pci_probe & PCI_ROOT_NO_CRS)
	146	pci_use_crs = false;
	147	else if (pci_probe & PCI_USE__CRS)
	148	pci_use_crs = true;
	149
	150	printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
	151	"if necessary, use \"pci=%s\" and report a bug\n",
	152	pci_use_crs ? "Using" : "Ignoring",
	153	pci_use_crs ? "nocrs" : "use_crs");
	154	}
	155
c0fa4078	156	#ifdef CONFIG_PCI_MMCONFIG
a18e3690	157	static int check_segment(u16 seg, struct device dev, char estr)
c0fa4078 JL	158	{
	159	if (seg) {
	160	dev_err(dev,
	161	"%s can't access PCI configuration "
	162	"space under this host bridge.\n",
	163	estr);
	164	return -EIO;
	165	}
	166
	167	/*
	168	* Failure in adding MMCFG information is not fatal,
	169	* just can't access extended configuration space of
	170	* devices under this host bridge.
	171	*/
	172	dev_warn(dev,
	173	"%s can't access extended PCI configuration "
	174	"space under this bridge.\n",
	175	estr);
	176
	177	return 0;
	178	}
	179
4d6b4e69	180	static int setup_mcfg_map(struct acpi_pci_root_info *ci)
c0fa4078	181	{
4d6b4e69 JL	182	int result, seg;
	183	struct pci_root_info *info;
	184	struct acpi_pci_root *root = ci->root;
	185	struct device *dev = &ci->bridge->dev;
c0fa4078	186
4d6b4e69 JL	187	info = container_of(ci, struct pci_root_info, common);
	188	info->start_bus = (u8)root->secondary.start;
	189	info->end_bus = (u8)root->secondary.end;
c0fa4078	190	info->mcfg_added = false;
4d6b4e69	191	seg = info->sd.domain;
c0fa4078 JL	192
	193	/* return success if MMCFG is not in use */
	194	if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg)
	195	return 0;
	196
	197	if (!(pci_probe & PCI_PROBE_MMCONF))
	198	return check_segment(seg, dev, "MMCONFIG is disabled,");
	199
4d6b4e69 JL	200	result = pci_mmconfig_insert(dev, seg, info->start_bus, info->end_bus,
4d6b4e69 JL	201	root->mcfg_addr);
c0fa4078 JL	202	if (result == 0) {
	203	/* enable MMCFG if it hasn't been enabled yet */
	204	if (raw_pci_ext_ops == NULL)
	205	raw_pci_ext_ops = &pci_mmcfg;
	206	info->mcfg_added = true;
	207	} else if (result != -EEXIST)
	208	return check_segment(seg, dev,
	209	"fail to add MMCONFIG information,");
	210
	211	return 0;
	212	}
	213
4d6b4e69	214	static void teardown_mcfg_map(struct acpi_pci_root_info *ci)
c0fa4078	215	{
4d6b4e69 JL	216	struct pci_root_info *info;
	217
	218	info = container_of(ci, struct pci_root_info, common);
c0fa4078	219	if (info->mcfg_added) {
4d6b4e69 JL	220	pci_mmconfig_delete(info->sd.domain,
4d6b4e69 JL	221	info->start_bus, info->end_bus);
c0fa4078 JL	222	info->mcfg_added = false;
	223	}
	224	}
	225	#else
4d6b4e69	226	static int setup_mcfg_map(struct acpi_pci_root_info *ci)
c0fa4078 JL	227	{
	228	return 0;
	229	}
4d6b4e69 JL	230
4d6b4e69 JL	231	static void teardown_mcfg_map(struct acpi_pci_root_info *ci)
c0fa4078 JL	232	{
	233	}
	234	#endif
	235
4d6b4e69	236	static int pci_acpi_root_get_node(struct acpi_pci_root *root)
62f420f8	237	{
4d6b4e69 JL	238	int busnum = root->secondary.start;
	239	struct acpi_device *device = root->device;
	240	int node = acpi_get_node(device->handle);
593669c2	241
4d6b4e69 JL	242	if (node == NUMA_NO_NODE) {
	243	node = x86_pci_root_bus_node(busnum);
	244	if (node != 0 && node != NUMA_NO_NODE)
	245	dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n",
	246	node);
4723d0f2	247	}
4d6b4e69 JL	248	if (node != NUMA_NO_NODE && !node_online(node))
	249	node = NUMA_NO_NODE;
	250
	251	return node;
4723d0f2 BH	252	}
4723d0f2 BH	253
4d6b4e69	254	static int pci_acpi_root_init_info(struct acpi_pci_root_info *ci)
4723d0f2	255	{
4d6b4e69	256	return setup_mcfg_map(ci);
fd3b0c1e YL	257	}
fd3b0c1e YL	258
4d6b4e69	259	static void pci_acpi_root_release_info(struct acpi_pci_root_info *ci)
fd3b0c1e	260	{
4d6b4e69 JL	261	teardown_mcfg_map(ci);
4d6b4e69 JL	262	kfree(container_of(ci, struct pci_root_info, common));
fd3b0c1e	263	}
c0fa4078	264
2c62e849 JL	265	/*
	266	* An IO port or MMIO resource assigned to a PCI host bridge may be
	267	* consumed by the host bridge itself or available to its child
	268	* bus/devices. The ACPI specification defines a bit (Producer/Consumer)
	269	* to tell whether the resource is consumed by the host bridge itself,
	270	* but firmware hasn't used that bit consistently, so we can't rely on it.
	271	*
	272	* On x86 and IA64 platforms, all IO port and MMIO resources are assumed
	273	* to be available to child bus/devices except one special case:
	274	* IO port [0xCF8-0xCFF] is consumed by the host bridge itself
	275	* to access PCI configuration space.
	276	*
	277	* So explicitly filter out PCI CFG IO ports[0xCF8-0xCFF].
	278	*/
	279	static bool resource_is_pcicfg_ioport(struct resource *res)
	280	{
	281	return (res->flags & IORESOURCE_IO) &&
	282	res->start == 0xCF8 && res->end == 0xCFF;
	283	}
	284
4d6b4e69	285	static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci)
62f420f8	286	{
4d6b4e69 JL	287	struct acpi_device *device = ci->bridge;
4d6b4e69 JL	288	int busnum = ci->root->secondary.start;
63f1789e	289	struct resource_entry entry, tmp;
4d6b4e69	290	int status;
62f420f8	291
4d6b4e69 JL	292	status = acpi_pci_probe_root_resources(ci);
	293	if (pci_use_crs) {
	294	resource_list_for_each_entry_safe(entry, tmp, &ci->resources)
	295	if (resource_is_pcicfg_ioport(entry->res))
63f1789e	296	resource_list_destroy_entry(entry);
4d6b4e69 JL	297	return status;
	298	}
	299
	300	resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
	301	dev_printk(KERN_DEBUG, &device->dev,
	302	"host bridge window %pR (ignored)\n", entry->res);
	303	resource_list_destroy_entry(entry);
	304	}
	305	x86_pci_root_bus_resources(busnum, &ci->resources);
	306
	307	return 0;
62f420f8 GH	308	}
62f420f8 GH	309
4d6b4e69 JL	310	static struct acpi_pci_root_ops acpi_pci_root_ops = {
	311	.pci_ops = &pci_root_ops,
	312	.init_info = pci_acpi_root_init_info,
	313	.release_info = pci_acpi_root_release_info,
	314	.prepare_resources = pci_acpi_root_prepare_resources,
	315	};
	316
a18e3690	317	struct pci_bus pci_acpi_scan_root(struct acpi_pci_root root)
1da177e4	318	{
57283776 BH	319	int domain = root->segment;
57283776 BH	320	int busnum = root->secondary.start;
4d6b4e69	321	int node = pci_acpi_root_get_node(root);
8928d5a6	322	struct pci_bus *bus;
08f1c192	323
1f09b09b	324	if (pci_ignore_seg)
a3669868	325	root->segment = domain = 0;
1f09b09b	326
a79e4198	327	if (domain && !pci_domains_supported) {
2a6bed83 BH	328	printk(KERN_WARNING "pci_bus %04x:%02x: "
	329	"ignored (multiple domains not supported)\n",
	330	domain, busnum);
a79e4198 JG	331	return NULL;
	332	}
	333
b87e81e5	334	bus = pci_find_bus(domain, busnum);
	335	if (bus) {
	336	/*
affbda86 BH	337	* If the desired bus has been scanned already, replace
affbda86 BH	338	* its bus->sysdata.
b87e81e5	339	*/
4d6b4e69 JL	340	struct pci_sysdata sd = {
	341	.domain = domain,
	342	.node = node,
	343	.companion = root->device
	344	};
593669c2	345
4d6b4e69 JL	346	memcpy(bus->sysdata, &sd, sizeof(sd));
	347	} else {
	348	struct pci_root_info *info;
	349
	350	info = kzalloc_node(sizeof(*info), GFP_KERNEL, node);
	351	if (!info)
	352	dev_err(&root->device->dev,
	353	"pci_bus %04x:%02x: ignored (out of memory)\n",
	354	domain, busnum);
	355	else {
	356	info->sd.domain = domain;
	357	info->sd.node = node;
	358	info->sd.companion = root->device;
	359	bus = acpi_pci_root_create(root, &acpi_pci_root_ops,
	360	&info->common, &info->sd);
fd3b0c1e	361	}
626fdfec	362	}
08f1c192	363
b03e7495 JM	364	/* After the PCI-E bus has been walked and all devices discovered,
	365	* configure any settings of the fabric that might be necessary.
	366	*/
	367	if (bus) {
	368	struct pci_bus *child;
a58674ff BH	369	list_for_each_entry(child, &bus->children, node)
a58674ff BH	370	pcie_bus_configure_settings(child);
b03e7495 JM	371	}
b03e7495 JM	372
69e1a33f	373	return bus;
1da177e4 LT	374	}
1da177e4 LT	375
6c0cc950 RW	376	int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
6c0cc950 RW	377	{
dc4fdaf0 RW	378	/*
	379	* We pass NULL as parent to pci_create_root_bus(), so if it is not NULL
	380	* here, pci_create_root_bus() has been called by someone else and
	381	* sysdata is likely to be different from what we expect. Let it go in
	382	* that case.
	383	*/
	384	if (!bridge->dev.parent) {
	385	struct pci_sysdata *sd = bridge->bus->sysdata;
	386	ACPI_COMPANION_SET(&bridge->dev, sd->companion);
	387	}
6c0cc950 RW	388	return 0;
	389	}
	390
8dd779b1	391	int __init pci_acpi_init(void)
1da177e4 LT	392	{
	393	struct pci_dev *dev = NULL;
	394
1da177e4	395	if (acpi_noirq)
b72d0db9	396	return -ENODEV;
1da177e4 LT	397
1da177e4 LT	398	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
1da177e4	399	pcibios_enable_irq = acpi_pci_irq_enable;
87bec66b	400	pcibios_disable_irq = acpi_pci_irq_disable;
ab3b3793	401	x86_init.pci.init_irq = x86_init_noop;
1da177e4 LT	402
	403	if (pci_routeirq) {
	404	/*
	405	* PCI IRQ routing is set up by pci_enable_device(), but we
	406	* also do it here in case there are still broken drivers that
	407	* don't use pci_enable_device().
	408	*/
	409	printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
fb37fb96	410	for_each_pci_dev(dev)
1da177e4	411	acpi_pci_irq_enable(dev);
657472e9	412	}
1da177e4	413
1da177e4 LT	414	return 0;
1da177e4 LT	415	}