[linux-2.6-block.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 <asm/numa.h>
#include <asm/pci_x86.h>

struct pci_root_info {
	struct acpi_device *bridge;
	char name[16];
	unsigned int res_num;
	struct resource *res;
	int busnum;
	struct pci_sysdata sd;
};

static bool pci_use_crs = true;

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 const struct dmi_system_id pci_use_crs_table[] __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"),
		},
	},

	/* 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 )"),
		},
	},
	{}
};

void __init pci_acpi_crs_quirks(void)
{
	int year;

	if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
		pci_use_crs = false;

	dmi_check_system(pci_use_crs_table);

	/*
	 * 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");
}

static acpi_status
resource_to_addr(struct acpi_resource *resource,
			struct acpi_resource_address64 *addr)
{
	acpi_status status;
	struct acpi_resource_memory24 *memory24;
	struct acpi_resource_memory32 *memory32;
	struct acpi_resource_fixed_memory32 *fixed_memory32;

	memset(addr, 0, sizeof(*addr));
	switch (resource->type) {
	case ACPI_RESOURCE_TYPE_MEMORY24:
		memory24 = &resource->data.memory24;
		addr->resource_type = ACPI_MEMORY_RANGE;
		addr->minimum = memory24->minimum;
		addr->address_length = memory24->address_length;
		addr->maximum = addr->minimum + addr->address_length - 1;
		return AE_OK;
	case ACPI_RESOURCE_TYPE_MEMORY32:
		memory32 = &resource->data.memory32;
		addr->resource_type = ACPI_MEMORY_RANGE;
		addr->minimum = memory32->minimum;
		addr->address_length = memory32->address_length;
		addr->maximum = addr->minimum + addr->address_length - 1;
		return AE_OK;
	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
		fixed_memory32 = &resource->data.fixed_memory32;
		addr->resource_type = ACPI_MEMORY_RANGE;
		addr->minimum = fixed_memory32->address;
		addr->address_length = fixed_memory32->address_length;
		addr->maximum = addr->minimum + addr->address_length - 1;
		return AE_OK;
	case ACPI_RESOURCE_TYPE_ADDRESS16:
	case ACPI_RESOURCE_TYPE_ADDRESS32:
	case ACPI_RESOURCE_TYPE_ADDRESS64:
		status = acpi_resource_to_address64(resource, addr);
		if (ACPI_SUCCESS(status) &&
		    (addr->resource_type == ACPI_MEMORY_RANGE ||
		    addr->resource_type == ACPI_IO_RANGE) &&
		    addr->address_length > 0) {
			return AE_OK;
		}
		break;
	}
	return AE_ERROR;
}

static acpi_status
count_resource(struct acpi_resource *acpi_res, void *data)
{
	struct pci_root_info *info = data;
	struct acpi_resource_address64 addr;
	acpi_status status;

	status = resource_to_addr(acpi_res, &addr);
	if (ACPI_SUCCESS(status))
		info->res_num++;
	return AE_OK;
}

static acpi_status
setup_resource(struct acpi_resource *acpi_res, void *data)
{
	struct pci_root_info *info = data;
	struct resource *res;
	struct acpi_resource_address64 addr;
	acpi_status status;
	unsigned long flags;
	u64 start, orig_end, end;

	status = resource_to_addr(acpi_res, &addr);
	if (!ACPI_SUCCESS(status))
		return AE_OK;

	if (addr.resource_type == ACPI_MEMORY_RANGE) {
		flags = IORESOURCE_MEM;
		if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
			flags |= IORESOURCE_PREFETCH;
	} else if (addr.resource_type == ACPI_IO_RANGE) {
		flags = IORESOURCE_IO;
	} else
		return AE_OK;

	start = addr.minimum + addr.translation_offset;
	orig_end = end = addr.maximum + addr.translation_offset;

	/* Exclude non-addressable range or non-addressable portion of range */
	end = min(end, (u64)iomem_resource.end);
	if (end <= start) {
		dev_info(&info->bridge->dev,
			"host bridge window [%#llx-%#llx] "
			"(ignored, not CPU addressable)\n", start, orig_end);
		return AE_OK;
	} else if (orig_end != end) {
		dev_info(&info->bridge->dev,
			"host bridge window [%#llx-%#llx] "
			"([%#llx-%#llx] ignored, not CPU addressable)\n", 
			start, orig_end, end + 1, orig_end);
	}

	res = &info->res[info->res_num];
	res->name = info->name;
	res->flags = flags;
	res->start = start;
	res->end = end;
	res->child = NULL;

	if (!pci_use_crs) {
		dev_printk(KERN_DEBUG, &info->bridge->dev,
			   "host bridge window %pR (ignored)\n", res);
		return AE_OK;
	}

	info->res_num++;
	if (addr.translation_offset)
		dev_info(&info->bridge->dev, "host bridge window %pR "
			 "(PCI address [%#llx-%#llx])\n",
			 res, res->start - addr.translation_offset,
			 res->end - addr.translation_offset);
	else
		dev_info(&info->bridge->dev, "host bridge window %pR\n", res);

	return AE_OK;
}

static void coalesce_windows(struct pci_root_info *info, unsigned long type)
{
	int i, j;
	struct resource *res1, *res2;

	for (i = 0; i < info->res_num; i++) {
		res1 = &info->res[i];
		if (!(res1->flags & type))
			continue;

		for (j = i + 1; j < info->res_num; j++) {
			res2 = &info->res[j];
			if (!(res2->flags & type))
				continue;

			/*
			 * I don't like throwing away windows because then
			 * our resources no longer match the ACPI _CRS, but
			 * the kernel resource tree doesn't allow overlaps.
			 */
			if (resource_overlaps(res1, res2)) {
				res1->start = min(res1->start, res2->start);
				res1->end = max(res1->end, res2->end);
				dev_info(&info->bridge->dev,
					 "host bridge window expanded to %pR; %pR ignored\n",
					 res1, res2);
				res2->flags = 0;
			}
		}
	}
}

static void add_resources(struct pci_root_info *info,
			  struct list_head *resources)
{
	int i;
	struct resource *res, *root, *conflict;

	coalesce_windows(info, IORESOURCE_MEM);
	coalesce_windows(info, IORESOURCE_IO);

	for (i = 0; i < info->res_num; i++) {
		res = &info->res[i];

		if (res->flags & IORESOURCE_MEM)
			root = &iomem_resource;
		else if (res->flags & IORESOURCE_IO)
			root = &ioport_resource;
		else
			continue;

		conflict = insert_resource_conflict(root, res);
		if (conflict)
			dev_info(&info->bridge->dev,
				 "ignoring host bridge window %pR (conflicts with %s %pR)\n",
				 res, conflict->name, conflict);
		else
			pci_add_resource(resources, res);
	}
}

static void free_pci_root_info_res(struct pci_root_info *info)
{
	kfree(info->res);
	info->res = NULL;
	info->res_num = 0;
}

static void __release_pci_root_info(struct pci_root_info *info)
{
	int i;
	struct resource *res;

	for (i = 0; i < info->res_num; i++) {
		res = &info->res[i];

		if (!res->parent)
			continue;

		if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
			continue;

		release_resource(res);
	}

	free_pci_root_info_res(info);

	kfree(info);
}
static void release_pci_root_info(struct pci_host_bridge *bridge)
{
	struct pci_root_info *info = bridge->release_data;

	__release_pci_root_info(info);
}

static void
probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
		    int busnum, int domain)
{
	size_t size;

	info->bridge = device;
	info->res_num = 0;
	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
				info);
	if (!info->res_num)
		return;

	size = sizeof(*info->res) * info->res_num;
	info->res_num = 0;
	info->res = kmalloc(size, GFP_KERNEL);
	if (!info->res)
		return;

	sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);

	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
				info);
}

struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
{
	struct acpi_device *device = root->device;
	struct pci_root_info *info = NULL;
	int domain = root->segment;
	int busnum = root->secondary.start;
	LIST_HEAD(resources);
	struct pci_bus *bus;
	struct pci_sysdata *sd;
	int node;
#ifdef CONFIG_ACPI_NUMA
	int pxm;
#endif

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

	node = -1;
#ifdef CONFIG_ACPI_NUMA
	pxm = acpi_get_pxm(device->handle);
	if (pxm >= 0)
		node = pxm_to_node(pxm);
	if (node != -1)
		set_mp_bus_to_node(busnum, node);
	else
#endif
		node = get_mp_bus_to_node(busnum);

	if (node != -1 && !node_online(node))
		node = -1;

	info = kzalloc(sizeof(*info), GFP_KERNEL);
	if (!info) {
		printk(KERN_WARNING "pci_bus %04x:%02x: "
		       "ignored (out of memory)\n", domain, busnum);
		return NULL;
	}

	sd = &info->sd;
	sd->domain = domain;
	sd->node = node;
	/*
	 * Maybe the desired pci bus has been already scanned. In such case
	 * it is unnecessary to scan the pci bus with the given domain,busnum.
	 */
	bus = pci_find_bus(domain, busnum);
	if (bus) {
		/*
		 * If the desired bus exits, the content of bus->sysdata will
		 * be replaced by sd.
		 */
		memcpy(bus->sysdata, sd, sizeof(*sd));
		kfree(info);
	} else {
		probe_pci_root_info(info, device, busnum, domain);

		/*
		 * _CRS with no apertures is normal, so only fall back to
		 * defaults or native bridge info if we're ignoring _CRS.
		 */
		if (pci_use_crs)
			add_resources(info, &resources);
		else {
			free_pci_root_info_res(info);
			x86_pci_root_bus_resources(busnum, &resources);
		}

		bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd,
					  &resources);
		if (bus) {
			bus->busn_res.end = pci_scan_child_bus(bus);
			pci_set_host_bridge_release(
				to_pci_host_bridge(bus->bridge),
				release_pci_root_info, info);
		} else {
			pci_free_resource_list(&resources);
			__release_pci_root_info(info);
		}
	}

	/* 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) {
			struct pci_dev *self = child->self;
			if (!self)
				continue;

			pcie_bus_configure_settings(child, self->pcie_mpss);
		}
	}

	if (bus && node != -1) {
#ifdef CONFIG_ACPI_NUMA
		if (pxm >= 0)
			dev_printk(KERN_DEBUG, &bus->dev,
				   "on NUMA node %d (pxm %d)\n", node, pxm);
#else
		dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
#endif
	}

	return bus;
}

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");
	acpi_irq_penalty_init();
	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>
69e1a33f	7	#include <asm/numa.h>
82487711	8	#include <asm/pci_x86.h>
1da177e4	9
62f420f8	10	struct pci_root_info {
42887b29	11	struct acpi_device *bridge;
fe05725f	12	char name[16];
62f420f8 GH	13	unsigned int res_num;
62f420f8 GH	14	struct resource *res;
62f420f8	15	int busnum;
35cb05e5	16	struct pci_sysdata sd;
62f420f8 GH	17	};
62f420f8 GH	18
7bc5e3f2 BH	19	static bool pci_use_crs = true;
	20
	21	static int __init set_use_crs(const struct dmi_system_id *id)
	22	{
	23	pci_use_crs = true;
	24	return 0;
	25	}
	26
28c3c05d DJ	27	static int __init set_nouse_crs(const struct dmi_system_id *id)
	28	{
	29	pci_use_crs = false;
	30	return 0;
	31	}
	32
7bc5e3f2 BH	33	static const struct dmi_system_id pci_use_crs_table[] __initconst = {
	34	/* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
	35	{
	36	.callback = set_use_crs,
	37	.ident = "IBM System x3800",
	38	.matches = {
	39	DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
	40	DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
	41	},
	42	},
2491762c BH	43	/* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
	44	/* 2006 AMD HT/VIA system with two host bridges */
	45	{
	46	.callback = set_use_crs,
	47	.ident = "ASRock ALiveSATA2-GLAN",
	48	.matches = {
	49	DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
	50	},
	51	},
29cf7a30 PM	52	/* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
	53	/* 2006 AMD HT/VIA system with two host bridges */
	54	{
	55	.callback = set_use_crs,
	56	.ident = "ASUS M2V-MX SE",
	57	.matches = {
	58	DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
	59	DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
	60	DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
	61	},
	62	},
84113717 JN	63	/* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
	64	{
	65	.callback = set_use_crs,
	66	.ident = "MSI MS-7253",
	67	.matches = {
	68	DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
	69	DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
	70	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
84113717 JN	71	},
84113717 JN	72	},
28c3c05d	73
e702781f DJ	74	/* Now for the blacklist.. */
	75
	76	/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
	77	{
	78	.callback = set_nouse_crs,
	79	.ident = "Dell Studio 1557",
	80	.matches = {
	81	DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
	82	DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
	83	DMI_MATCH(DMI_BIOS_VERSION, "A09"),
	84	},
	85	},
8b6a5af9 DJ	86	/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
	87	{
	88	.callback = set_nouse_crs,
	89	.ident = "Thinkpad SL510",
	90	.matches = {
	91	DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
	92	DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
	93	DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
	94	},
	95	},
7bc5e3f2 BH	96	{}
	97	};
	98
	99	void __init pci_acpi_crs_quirks(void)
	100	{
	101	int year;
	102
	103	if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
	104	pci_use_crs = false;
	105
	106	dmi_check_system(pci_use_crs_table);
	107
	108	/*
	109	* If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
	110	* takes precedence over anything we figured out above.
	111	*/
	112	if (pci_probe & PCI_ROOT_NO_CRS)
	113	pci_use_crs = false;
	114	else if (pci_probe & PCI_USE__CRS)
	115	pci_use_crs = true;
	116
	117	printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
	118	"if necessary, use \"pci=%s\" and report a bug\n",
	119	pci_use_crs ? "Using" : "Ignoring",
	120	pci_use_crs ? "nocrs" : "use_crs");
	121	}
	122
62f420f8 GH	123	static acpi_status
	124	resource_to_addr(struct acpi_resource *resource,
	125	struct acpi_resource_address64 *addr)
	126	{
	127	acpi_status status;
66528fdd BH	128	struct acpi_resource_memory24 *memory24;
	129	struct acpi_resource_memory32 *memory32;
	130	struct acpi_resource_fixed_memory32 *fixed_memory32;
62f420f8	131
66528fdd BH	132	memset(addr, 0, sizeof(*addr));
	133	switch (resource->type) {
	134	case ACPI_RESOURCE_TYPE_MEMORY24:
	135	memory24 = &resource->data.memory24;
	136	addr->resource_type = ACPI_MEMORY_RANGE;
	137	addr->minimum = memory24->minimum;
	138	addr->address_length = memory24->address_length;
	139	addr->maximum = addr->minimum + addr->address_length - 1;
62f420f8	140	return AE_OK;
66528fdd BH	141	case ACPI_RESOURCE_TYPE_MEMORY32:
	142	memory32 = &resource->data.memory32;
	143	addr->resource_type = ACPI_MEMORY_RANGE;
	144	addr->minimum = memory32->minimum;
	145	addr->address_length = memory32->address_length;
	146	addr->maximum = addr->minimum + addr->address_length - 1;
	147	return AE_OK;
	148	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
	149	fixed_memory32 = &resource->data.fixed_memory32;
	150	addr->resource_type = ACPI_MEMORY_RANGE;
	151	addr->minimum = fixed_memory32->address;
	152	addr->address_length = fixed_memory32->address_length;
	153	addr->maximum = addr->minimum + addr->address_length - 1;
	154	return AE_OK;
	155	case ACPI_RESOURCE_TYPE_ADDRESS16:
	156	case ACPI_RESOURCE_TYPE_ADDRESS32:
	157	case ACPI_RESOURCE_TYPE_ADDRESS64:
	158	status = acpi_resource_to_address64(resource, addr);
	159	if (ACPI_SUCCESS(status) &&
	160	(addr->resource_type == ACPI_MEMORY_RANGE \|\|
	161	addr->resource_type == ACPI_IO_RANGE) &&
	162	addr->address_length > 0) {
	163	return AE_OK;
	164	}
	165	break;
62f420f8 GH	166	}
	167	return AE_ERROR;
	168	}
	169
	170	static acpi_status
	171	count_resource(struct acpi_resource acpi_res, void data)
	172	{
	173	struct pci_root_info *info = data;
	174	struct acpi_resource_address64 addr;
	175	acpi_status status;
	176
	177	status = resource_to_addr(acpi_res, &addr);
	178	if (ACPI_SUCCESS(status))
	179	info->res_num++;
	180	return AE_OK;
	181	}
	182
	183	static acpi_status
	184	setup_resource(struct acpi_resource acpi_res, void data)
	185	{
	186	struct pci_root_info *info = data;
	187	struct resource *res;
	188	struct acpi_resource_address64 addr;
	189	acpi_status status;
	190	unsigned long flags;
ae5cd864	191	u64 start, orig_end, end;
2cdb3f1d	192
62f420f8 GH	193	status = resource_to_addr(acpi_res, &addr);
	194	if (!ACPI_SUCCESS(status))
	195	return AE_OK;
	196
	197	if (addr.resource_type == ACPI_MEMORY_RANGE) {
62f420f8 GH	198	flags = IORESOURCE_MEM;
	199	if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
	200	flags \|= IORESOURCE_PREFETCH;
	201	} else if (addr.resource_type == ACPI_IO_RANGE) {
62f420f8 GH	202	flags = IORESOURCE_IO;
	203	} else
	204	return AE_OK;
	205
2cdb3f1d	206	start = addr.minimum + addr.translation_offset;
ae5cd864 GH	207	orig_end = end = addr.maximum + addr.translation_offset;
	208
	209	/* Exclude non-addressable range or non-addressable portion of range */
	210	end = min(end, (u64)iomem_resource.end);
	211	if (end <= start) {
	212	dev_info(&info->bridge->dev,
	213	"host bridge window [%#llx-%#llx] "
	214	"(ignored, not CPU addressable)\n", start, orig_end);
	215	return AE_OK;
	216	} else if (orig_end != end) {
	217	dev_info(&info->bridge->dev,
	218	"host bridge window [%#llx-%#llx] "
	219	"([%#llx-%#llx] ignored, not CPU addressable)\n",
	220	start, orig_end, end + 1, orig_end);
	221	}
f9cde5ff	222
2cdb3f1d YL	223	res = &info->res[info->res_num];
	224	res->name = info->name;
	225	res->flags = flags;
	226	res->start = start;
	227	res->end = end;
	228	res->child = NULL;
	229
7bc5e3f2	230	if (!pci_use_crs) {
f1db6fde BH	231	dev_printk(KERN_DEBUG, &info->bridge->dev,
	232	"host bridge window %pR (ignored)\n", res);
	233	return AE_OK;
	234	}
	235
4723d0f2 BH	236	info->res_num++;
	237	if (addr.translation_offset)
	238	dev_info(&info->bridge->dev, "host bridge window %pR "
	239	"(PCI address [%#llx-%#llx])\n",
	240	res, res->start - addr.translation_offset,
	241	res->end - addr.translation_offset);
	242	else
	243	dev_info(&info->bridge->dev, "host bridge window %pR\n", res);
	244
	245	return AE_OK;
	246	}
	247
6e33a852	248	static void coalesce_windows(struct pci_root_info *info, unsigned long type)
4723d0f2 BH	249	{
	250	int i, j;
	251	struct resource res1, res2;
	252
	253	for (i = 0; i < info->res_num; i++) {
	254	res1 = &info->res[i];
	255	if (!(res1->flags & type))
	256	continue;
	257
	258	for (j = i + 1; j < info->res_num; j++) {
	259	res2 = &info->res[j];
	260	if (!(res2->flags & type))
	261	continue;
	262
	263	/*
	264	* I don't like throwing away windows because then
	265	* our resources no longer match the ACPI _CRS, but
	266	* the kernel resource tree doesn't allow overlaps.
	267	*/
74d24b21	268	if (resource_overlaps(res1, res2)) {
4723d0f2 BH	269	res1->start = min(res1->start, res2->start);
	270	res1->end = max(res1->end, res2->end);
	271	dev_info(&info->bridge->dev,
	272	"host bridge window expanded to %pR; %pR ignored\n",
	273	res1, res2);
	274	res2->flags = 0;
	275	}
	276	}
	277	}
	278	}
	279
9a03d28d YL	280	static void add_resources(struct pci_root_info *info,
9a03d28d YL	281	struct list_head *resources)
4723d0f2 BH	282	{
	283	int i;
	284	struct resource res, root, *conflict;
	285
4723d0f2 BH	286	coalesce_windows(info, IORESOURCE_MEM);
	287	coalesce_windows(info, IORESOURCE_IO);
	288
	289	for (i = 0; i < info->res_num; i++) {
	290	res = &info->res[i];
	291
	292	if (res->flags & IORESOURCE_MEM)
	293	root = &iomem_resource;
	294	else if (res->flags & IORESOURCE_IO)
	295	root = &ioport_resource;
42887b29	296	else
4723d0f2 BH	297	continue;
	298
	299	conflict = insert_resource_conflict(root, res);
	300	if (conflict)
43d786ed BH	301	dev_info(&info->bridge->dev,
	302	"ignoring host bridge window %pR (conflicts with %s %pR)\n",
	303	res, conflict->name, conflict);
4723d0f2	304	else
9a03d28d	305	pci_add_resource(resources, res);
62f420f8	306	}
62f420f8 GH	307	}
62f420f8 GH	308
fd3b0c1e	309	static void free_pci_root_info_res(struct pci_root_info *info)
baa495d9	310	{
baa495d9	311	kfree(info->res);
fd3b0c1e YL	312	info->res = NULL;
	313	info->res_num = 0;
	314	}
	315
	316	static void __release_pci_root_info(struct pci_root_info *info)
	317	{
	318	int i;
	319	struct resource *res;
	320
	321	for (i = 0; i < info->res_num; i++) {
	322	res = &info->res[i];
	323
	324	if (!res->parent)
	325	continue;
	326
	327	if (!(res->flags & (IORESOURCE_MEM \| IORESOURCE_IO)))
	328	continue;
	329
	330	release_resource(res);
	331	}
	332
	333	free_pci_root_info_res(info);
	334
	335	kfree(info);
	336	}
	337	static void release_pci_root_info(struct pci_host_bridge *bridge)
	338	{
	339	struct pci_root_info *info = bridge->release_data;
	340
	341	__release_pci_root_info(info);
baa495d9 YL	342	}
baa495d9 YL	343
62f420f8	344	static void
9a03d28d YL	345	probe_pci_root_info(struct pci_root_info info, struct acpi_device device,
9a03d28d YL	346	int busnum, int domain)
62f420f8	347	{
62f420f8 GH	348	size_t size;
62f420f8 GH	349
baa495d9 YL	350	info->bridge = device;
baa495d9 YL	351	info->res_num = 0;
62f420f8	352	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
baa495d9 YL	353	info);
baa495d9 YL	354	if (!info->res_num)
62f420f8 GH	355	return;
62f420f8 GH	356
baa495d9	357	size = sizeof(info->res) info->res_num;
9a03d28d	358	info->res_num = 0;
baa495d9 YL	359	info->res = kmalloc(size, GFP_KERNEL);
baa495d9 YL	360	if (!info->res)
2cd6975a	361	return;
62f420f8	362
fe05725f	363	sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
62f420f8	364
62f420f8	365	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
baa495d9	366	info);
62f420f8 GH	367	}
62f420f8 GH	368
57283776	369	struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
1da177e4	370	{
57283776	371	struct acpi_device *device = root->device;
fd3b0c1e	372	struct pci_root_info *info = NULL;
57283776 BH	373	int domain = root->segment;
57283776 BH	374	int busnum = root->secondary.start;
2cd6975a	375	LIST_HEAD(resources);
69e1a33f	376	struct pci_bus *bus;
08f1c192	377	struct pci_sysdata *sd;
871d5f8d YL	378	int node;
871d5f8d YL	379	#ifdef CONFIG_ACPI_NUMA
08f1c192	380	int pxm;
871d5f8d	381	#endif
08f1c192	382
a79e4198	383	if (domain && !pci_domains_supported) {
2a6bed83 BH	384	printk(KERN_WARNING "pci_bus %04x:%02x: "
	385	"ignored (multiple domains not supported)\n",
	386	domain, busnum);
a79e4198 JG	387	return NULL;
	388	}
	389
871d5f8d YL	390	node = -1;
	391	#ifdef CONFIG_ACPI_NUMA
	392	pxm = acpi_get_pxm(device->handle);
	393	if (pxm >= 0)
	394	node = pxm_to_node(pxm);
	395	if (node != -1)
	396	set_mp_bus_to_node(busnum, node);
	397	else
871d5f8d	398	#endif
871d5f8d	399	node = get_mp_bus_to_node(busnum);
b755de8d YL	400
	401	if (node != -1 && !node_online(node))
	402	node = -1;
871d5f8d	403
35cb05e5 YL	404	info = kzalloc(sizeof(*info), GFP_KERNEL);
35cb05e5 YL	405	if (!info) {
2a6bed83 BH	406	printk(KERN_WARNING "pci_bus %04x:%02x: "
2a6bed83 BH	407	"ignored (out of memory)\n", domain, busnum);
08f1c192 MBY	408	return NULL;
08f1c192 MBY	409	}
69e1a33f	410
35cb05e5	411	sd = &info->sd;
a79e4198	412	sd->domain = domain;
871d5f8d	413	sd->node = node;
b87e81e5	414	/*
	415	* Maybe the desired pci bus has been already scanned. In such case
	416	* it is unnecessary to scan the pci bus with the given domain,busnum.
	417	*/
	418	bus = pci_find_bus(domain, busnum);
	419	if (bus) {
	420	/*
	421	* If the desired bus exits, the content of bus->sysdata will
	422	* be replaced by sd.
	423	*/
	424	memcpy(bus->sysdata, sd, sizeof(*sd));
fd3b0c1e	425	kfree(info);
626fdfec	426	} else {
fd3b0c1e	427	probe_pci_root_info(info, device, busnum, domain);
316d86fe BH	428
	429	/*
	430	* _CRS with no apertures is normal, so only fall back to
	431	* defaults or native bridge info if we're ignoring _CRS.
	432	*/
9a03d28d	433	if (pci_use_crs)
fd3b0c1e	434	add_resources(info, &resources);
9a03d28d	435	else {
fd3b0c1e	436	free_pci_root_info_res(info);
2cd6975a	437	x86_pci_root_bus_resources(busnum, &resources);
9a03d28d	438	}
fd3b0c1e	439
2cd6975a BH	440	bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd,
2cd6975a BH	441	&resources);
fd3b0c1e	442	if (bus) {
b918c62e	443	bus->busn_res.end = pci_scan_child_bus(bus);
fd3b0c1e YL	444	pci_set_host_bridge_release(
	445	to_pci_host_bridge(bus->bridge),
	446	release_pci_root_info, info);
	447	} else {
2cd6975a	448	pci_free_resource_list(&resources);
fd3b0c1e YL	449	__release_pci_root_info(info);
fd3b0c1e YL	450	}
626fdfec	451	}
08f1c192	452
b03e7495 JM	453	/* After the PCI-E bus has been walked and all devices discovered,
	454	* configure any settings of the fabric that might be necessary.
	455	*/
	456	if (bus) {
	457	struct pci_bus *child;
5307f6d5 SI	458	list_for_each_entry(child, &bus->children, node) {
	459	struct pci_dev *self = child->self;
	460	if (!self)
	461	continue;
	462
	463	pcie_bus_configure_settings(child, self->pcie_mpss);
	464	}
b03e7495 JM	465	}
b03e7495 JM	466
dbb6152e	467	if (bus && node != -1) {
69e1a33f	468	#ifdef CONFIG_ACPI_NUMA
dbb6152e	469	if (pxm >= 0)
2b8c2efe BH	470	dev_printk(KERN_DEBUG, &bus->dev,
2b8c2efe BH	471	"on NUMA node %d (pxm %d)\n", node, pxm);
dbb6152e	472	#else
2b8c2efe	473	dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
69e1a33f	474	#endif
dbb6152e	475	}
62f420f8	476
69e1a33f	477	return bus;
1da177e4 LT	478	}
1da177e4 LT	479
8dd779b1	480	int __init pci_acpi_init(void)
1da177e4 LT	481	{
	482	struct pci_dev *dev = NULL;
	483
1da177e4	484	if (acpi_noirq)
b72d0db9	485	return -ENODEV;
1da177e4 LT	486
	487	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
	488	acpi_irq_penalty_init();
1da177e4	489	pcibios_enable_irq = acpi_pci_irq_enable;
87bec66b	490	pcibios_disable_irq = acpi_pci_irq_disable;
ab3b3793	491	x86_init.pci.init_irq = x86_init_noop;
1da177e4 LT	492
	493	if (pci_routeirq) {
	494	/*
	495	* PCI IRQ routing is set up by pci_enable_device(), but we
	496	* also do it here in case there are still broken drivers that
	497	* don't use pci_enable_device().
	498	*/
	499	printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
fb37fb96	500	for_each_pci_dev(dev)
1da177e4	501	acpi_pci_irq_enable(dev);
657472e9	502	}
1da177e4	503
1da177e4 LT	504	return 0;
1da177e4 LT	505	}