[linux-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;
	unsigned int res_num;
	struct resource *res;
	int busnum;
};

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 bool resource_contains(struct resource *res, resource_size_t point)
{
	if (res->start <= point && point <= res->end)
		return true;
	return false;
}

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_contains(res1, res2->start) ||
			    resource_contains(res1, res2->end) ||
			    resource_contains(res2, res1->start) ||
			    resource_contains(res2, res1->end)) {
				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->name);
	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;

	info->name = kasprintf(GFP_KERNEL, "PCI Bus %04x:%02x", domain, busnum);
	if (!info->name)
		return;

	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;

	/* Allocate per-root-bus (not per bus) arch-specific data.
	 * TODO: leak; this memory is never freed.
	 * It's arguable whether it's worth the trouble to care.
	 */
	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
	if (!sd) {
		printk(KERN_WARNING "pci_bus %04x:%02x: "
		       "ignored (out of memory)\n", domain, busnum);
		return NULL;
	}

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

	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;
62f420f8 GH	12	char *name;
	13	unsigned int res_num;
	14	struct resource *res;
62f420f8 GH	15	int busnum;
	16	};
	17
7bc5e3f2 BH	18	static bool pci_use_crs = true;
	19
	20	static int __init set_use_crs(const struct dmi_system_id *id)
	21	{
	22	pci_use_crs = true;
	23	return 0;
	24	}
	25
28c3c05d DJ	26	static int __init set_nouse_crs(const struct dmi_system_id *id)
	27	{
	28	pci_use_crs = false;
	29	return 0;
	30	}
	31
7bc5e3f2 BH	32	static const struct dmi_system_id pci_use_crs_table[] __initconst = {
	33	/* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
	34	{
	35	.callback = set_use_crs,
	36	.ident = "IBM System x3800",
	37	.matches = {
	38	DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
	39	DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
	40	},
	41	},
2491762c BH	42	/* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
	43	/* 2006 AMD HT/VIA system with two host bridges */
	44	{
	45	.callback = set_use_crs,
	46	.ident = "ASRock ALiveSATA2-GLAN",
	47	.matches = {
	48	DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
	49	},
	50	},
29cf7a30 PM	51	/* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
	52	/* 2006 AMD HT/VIA system with two host bridges */
	53	{
	54	.callback = set_use_crs,
	55	.ident = "ASUS M2V-MX SE",
	56	.matches = {
	57	DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
	58	DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
	59	DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
	60	},
	61	},
84113717 JN	62	/* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
	63	{
	64	.callback = set_use_crs,
	65	.ident = "MSI MS-7253",
	66	.matches = {
	67	DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
	68	DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
	69	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
84113717 JN	70	},
84113717 JN	71	},
28c3c05d	72
e702781f DJ	73	/* Now for the blacklist.. */
	74
	75	/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
	76	{
	77	.callback = set_nouse_crs,
	78	.ident = "Dell Studio 1557",
	79	.matches = {
	80	DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
	81	DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
	82	DMI_MATCH(DMI_BIOS_VERSION, "A09"),
	83	},
	84	},
8b6a5af9 DJ	85	/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
	86	{
	87	.callback = set_nouse_crs,
	88	.ident = "Thinkpad SL510",
	89	.matches = {
	90	DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
	91	DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
	92	DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
	93	},
	94	},
7bc5e3f2 BH	95	{}
	96	};
	97
	98	void __init pci_acpi_crs_quirks(void)
	99	{
	100	int year;
	101
	102	if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
	103	pci_use_crs = false;
	104
	105	dmi_check_system(pci_use_crs_table);
	106
	107	/*
	108	* If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
	109	* takes precedence over anything we figured out above.
	110	*/
	111	if (pci_probe & PCI_ROOT_NO_CRS)
	112	pci_use_crs = false;
	113	else if (pci_probe & PCI_USE__CRS)
	114	pci_use_crs = true;
	115
	116	printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
	117	"if necessary, use \"pci=%s\" and report a bug\n",
	118	pci_use_crs ? "Using" : "Ignoring",
	119	pci_use_crs ? "nocrs" : "use_crs");
	120	}
	121
62f420f8 GH	122	static acpi_status
	123	resource_to_addr(struct acpi_resource *resource,
	124	struct acpi_resource_address64 *addr)
	125	{
	126	acpi_status status;
66528fdd BH	127	struct acpi_resource_memory24 *memory24;
	128	struct acpi_resource_memory32 *memory32;
	129	struct acpi_resource_fixed_memory32 *fixed_memory32;
62f420f8	130
66528fdd BH	131	memset(addr, 0, sizeof(*addr));
	132	switch (resource->type) {
	133	case ACPI_RESOURCE_TYPE_MEMORY24:
	134	memory24 = &resource->data.memory24;
	135	addr->resource_type = ACPI_MEMORY_RANGE;
	136	addr->minimum = memory24->minimum;
	137	addr->address_length = memory24->address_length;
	138	addr->maximum = addr->minimum + addr->address_length - 1;
62f420f8	139	return AE_OK;
66528fdd BH	140	case ACPI_RESOURCE_TYPE_MEMORY32:
	141	memory32 = &resource->data.memory32;
	142	addr->resource_type = ACPI_MEMORY_RANGE;
	143	addr->minimum = memory32->minimum;
	144	addr->address_length = memory32->address_length;
	145	addr->maximum = addr->minimum + addr->address_length - 1;
	146	return AE_OK;
	147	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
	148	fixed_memory32 = &resource->data.fixed_memory32;
	149	addr->resource_type = ACPI_MEMORY_RANGE;
	150	addr->minimum = fixed_memory32->address;
	151	addr->address_length = fixed_memory32->address_length;
	152	addr->maximum = addr->minimum + addr->address_length - 1;
	153	return AE_OK;
	154	case ACPI_RESOURCE_TYPE_ADDRESS16:
	155	case ACPI_RESOURCE_TYPE_ADDRESS32:
	156	case ACPI_RESOURCE_TYPE_ADDRESS64:
	157	status = acpi_resource_to_address64(resource, addr);
	158	if (ACPI_SUCCESS(status) &&
	159	(addr->resource_type == ACPI_MEMORY_RANGE \|\|
	160	addr->resource_type == ACPI_IO_RANGE) &&
	161	addr->address_length > 0) {
	162	return AE_OK;
	163	}
	164	break;
62f420f8 GH	165	}
	166	return AE_ERROR;
	167	}
	168
	169	static acpi_status
	170	count_resource(struct acpi_resource acpi_res, void data)
	171	{
	172	struct pci_root_info *info = data;
	173	struct acpi_resource_address64 addr;
	174	acpi_status status;
	175
	176	status = resource_to_addr(acpi_res, &addr);
	177	if (ACPI_SUCCESS(status))
	178	info->res_num++;
	179	return AE_OK;
	180	}
	181
	182	static acpi_status
	183	setup_resource(struct acpi_resource acpi_res, void data)
	184	{
	185	struct pci_root_info *info = data;
	186	struct resource *res;
	187	struct acpi_resource_address64 addr;
	188	acpi_status status;
	189	unsigned long flags;
ae5cd864	190	u64 start, orig_end, end;
2cdb3f1d	191
62f420f8 GH	192	status = resource_to_addr(acpi_res, &addr);
	193	if (!ACPI_SUCCESS(status))
	194	return AE_OK;
	195
	196	if (addr.resource_type == ACPI_MEMORY_RANGE) {
62f420f8 GH	197	flags = IORESOURCE_MEM;
	198	if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
	199	flags \|= IORESOURCE_PREFETCH;
	200	} else if (addr.resource_type == ACPI_IO_RANGE) {
62f420f8 GH	201	flags = IORESOURCE_IO;
	202	} else
	203	return AE_OK;
	204
2cdb3f1d	205	start = addr.minimum + addr.translation_offset;
ae5cd864 GH	206	orig_end = end = addr.maximum + addr.translation_offset;
	207
	208	/* Exclude non-addressable range or non-addressable portion of range */
	209	end = min(end, (u64)iomem_resource.end);
	210	if (end <= start) {
	211	dev_info(&info->bridge->dev,
	212	"host bridge window [%#llx-%#llx] "
	213	"(ignored, not CPU addressable)\n", start, orig_end);
	214	return AE_OK;
	215	} else if (orig_end != end) {
	216	dev_info(&info->bridge->dev,
	217	"host bridge window [%#llx-%#llx] "
	218	"([%#llx-%#llx] ignored, not CPU addressable)\n",
	219	start, orig_end, end + 1, orig_end);
	220	}
f9cde5ff	221
2cdb3f1d YL	222	res = &info->res[info->res_num];
	223	res->name = info->name;
	224	res->flags = flags;
	225	res->start = start;
	226	res->end = end;
	227	res->child = NULL;
	228
7bc5e3f2	229	if (!pci_use_crs) {
f1db6fde BH	230	dev_printk(KERN_DEBUG, &info->bridge->dev,
	231	"host bridge window %pR (ignored)\n", res);
	232	return AE_OK;
	233	}
	234
4723d0f2 BH	235	info->res_num++;
	236	if (addr.translation_offset)
	237	dev_info(&info->bridge->dev, "host bridge window %pR "
	238	"(PCI address [%#llx-%#llx])\n",
	239	res, res->start - addr.translation_offset,
	240	res->end - addr.translation_offset);
	241	else
	242	dev_info(&info->bridge->dev, "host bridge window %pR\n", res);
	243
	244	return AE_OK;
	245	}
	246
	247	static bool resource_contains(struct resource *res, resource_size_t point)
	248	{
	249	if (res->start <= point && point <= res->end)
	250	return true;
	251	return false;
	252	}
	253
6e33a852	254	static void coalesce_windows(struct pci_root_info *info, unsigned long type)
4723d0f2 BH	255	{
	256	int i, j;
	257	struct resource res1, res2;
	258
	259	for (i = 0; i < info->res_num; i++) {
	260	res1 = &info->res[i];
	261	if (!(res1->flags & type))
	262	continue;
	263
	264	for (j = i + 1; j < info->res_num; j++) {
	265	res2 = &info->res[j];
	266	if (!(res2->flags & type))
	267	continue;
	268
	269	/*
	270	* I don't like throwing away windows because then
	271	* our resources no longer match the ACPI _CRS, but
	272	* the kernel resource tree doesn't allow overlaps.
	273	*/
	274	if (resource_contains(res1, res2->start) \|\|
	275	resource_contains(res1, res2->end) \|\|
	276	resource_contains(res2, res1->start) \|\|
	277	resource_contains(res2, res1->end)) {
	278	res1->start = min(res1->start, res2->start);
	279	res1->end = max(res1->end, res2->end);
	280	dev_info(&info->bridge->dev,
	281	"host bridge window expanded to %pR; %pR ignored\n",
	282	res1, res2);
	283	res2->flags = 0;
	284	}
	285	}
	286	}
	287	}
	288
9a03d28d YL	289	static void add_resources(struct pci_root_info *info,
9a03d28d YL	290	struct list_head *resources)
4723d0f2 BH	291	{
	292	int i;
	293	struct resource res, root, *conflict;
	294
4723d0f2 BH	295	coalesce_windows(info, IORESOURCE_MEM);
	296	coalesce_windows(info, IORESOURCE_IO);
	297
	298	for (i = 0; i < info->res_num; i++) {
	299	res = &info->res[i];
	300
	301	if (res->flags & IORESOURCE_MEM)
	302	root = &iomem_resource;
	303	else if (res->flags & IORESOURCE_IO)
	304	root = &ioport_resource;
42887b29	305	else
4723d0f2 BH	306	continue;
	307
	308	conflict = insert_resource_conflict(root, res);
	309	if (conflict)
43d786ed BH	310	dev_info(&info->bridge->dev,
	311	"ignoring host bridge window %pR (conflicts with %s %pR)\n",
	312	res, conflict->name, conflict);
4723d0f2	313	else
9a03d28d	314	pci_add_resource(resources, res);
62f420f8	315	}
62f420f8 GH	316	}
62f420f8 GH	317
fd3b0c1e	318	static void free_pci_root_info_res(struct pci_root_info *info)
baa495d9 YL	319	{
	320	kfree(info->name);
	321	kfree(info->res);
fd3b0c1e YL	322	info->res = NULL;
	323	info->res_num = 0;
	324	}
	325
	326	static void __release_pci_root_info(struct pci_root_info *info)
	327	{
	328	int i;
	329	struct resource *res;
	330
	331	for (i = 0; i < info->res_num; i++) {
	332	res = &info->res[i];
	333
	334	if (!res->parent)
	335	continue;
	336
	337	if (!(res->flags & (IORESOURCE_MEM \| IORESOURCE_IO)))
	338	continue;
	339
	340	release_resource(res);
	341	}
	342
	343	free_pci_root_info_res(info);
	344
	345	kfree(info);
	346	}
	347	static void release_pci_root_info(struct pci_host_bridge *bridge)
	348	{
	349	struct pci_root_info *info = bridge->release_data;
	350
	351	__release_pci_root_info(info);
baa495d9 YL	352	}
baa495d9 YL	353
62f420f8	354	static void
9a03d28d YL	355	probe_pci_root_info(struct pci_root_info info, struct acpi_device device,
9a03d28d YL	356	int busnum, int domain)
62f420f8	357	{
62f420f8 GH	358	size_t size;
62f420f8 GH	359
baa495d9 YL	360	info->bridge = device;
baa495d9 YL	361	info->res_num = 0;
62f420f8	362	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
baa495d9 YL	363	info);
baa495d9 YL	364	if (!info->res_num)
62f420f8 GH	365	return;
62f420f8 GH	366
baa495d9	367	size = sizeof(info->res) info->res_num;
9a03d28d	368	info->res_num = 0;
baa495d9 YL	369	info->res = kmalloc(size, GFP_KERNEL);
baa495d9 YL	370	if (!info->res)
2cd6975a	371	return;
62f420f8	372
baa495d9 YL	373	info->name = kasprintf(GFP_KERNEL, "PCI Bus %04x:%02x", domain, busnum);
baa495d9 YL	374	if (!info->name)
9a03d28d	375	return;
62f420f8	376
62f420f8	377	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
baa495d9	378	info);
62f420f8 GH	379	}
62f420f8 GH	380
57283776	381	struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
1da177e4	382	{
57283776	383	struct acpi_device *device = root->device;
fd3b0c1e	384	struct pci_root_info *info = NULL;
57283776 BH	385	int domain = root->segment;
57283776 BH	386	int busnum = root->secondary.start;
2cd6975a	387	LIST_HEAD(resources);
69e1a33f	388	struct pci_bus *bus;
08f1c192	389	struct pci_sysdata *sd;
871d5f8d YL	390	int node;
871d5f8d YL	391	#ifdef CONFIG_ACPI_NUMA
08f1c192	392	int pxm;
871d5f8d	393	#endif
08f1c192	394
a79e4198	395	if (domain && !pci_domains_supported) {
2a6bed83 BH	396	printk(KERN_WARNING "pci_bus %04x:%02x: "
	397	"ignored (multiple domains not supported)\n",
	398	domain, busnum);
a79e4198 JG	399	return NULL;
	400	}
	401
871d5f8d YL	402	node = -1;
	403	#ifdef CONFIG_ACPI_NUMA
	404	pxm = acpi_get_pxm(device->handle);
	405	if (pxm >= 0)
	406	node = pxm_to_node(pxm);
	407	if (node != -1)
	408	set_mp_bus_to_node(busnum, node);
	409	else
871d5f8d	410	#endif
871d5f8d	411	node = get_mp_bus_to_node(busnum);
b755de8d YL	412
	413	if (node != -1 && !node_online(node))
	414	node = -1;
871d5f8d	415
08f1c192 MBY	416	/* Allocate per-root-bus (not per bus) arch-specific data.
	417	* TODO: leak; this memory is never freed.
	418	* It's arguable whether it's worth the trouble to care.
	419	*/
	420	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
	421	if (!sd) {
2a6bed83 BH	422	printk(KERN_WARNING "pci_bus %04x:%02x: "
2a6bed83 BH	423	"ignored (out of memory)\n", domain, busnum);
08f1c192 MBY	424	return NULL;
08f1c192 MBY	425	}
69e1a33f	426
a79e4198	427	sd->domain = domain;
871d5f8d	428	sd->node = node;
fd3b0c1e YL	429	info = kzalloc(sizeof(*info), GFP_KERNEL);
	430	if (!info) {
	431	kfree(sd);
	432	printk(KERN_WARNING "pci_bus %04x:%02x: "
	433	"ignored (out of memory)\n", domain, busnum);
	434	return NULL;
	435	}
b87e81e5	436	/*
	437	* Maybe the desired pci bus has been already scanned. In such case
	438	* it is unnecessary to scan the pci bus with the given domain,busnum.
	439	*/
	440	bus = pci_find_bus(domain, busnum);
	441	if (bus) {
	442	/*
	443	* If the desired bus exits, the content of bus->sysdata will
	444	* be replaced by sd.
	445	*/
	446	memcpy(bus->sysdata, sd, sizeof(*sd));
fd3b0c1e	447	kfree(info);
b87e81e5	448	kfree(sd);
626fdfec	449	} else {
fd3b0c1e	450	probe_pci_root_info(info, device, busnum, domain);
316d86fe BH	451
	452	/*
	453	* _CRS with no apertures is normal, so only fall back to
	454	* defaults or native bridge info if we're ignoring _CRS.
	455	*/
9a03d28d	456	if (pci_use_crs)
fd3b0c1e	457	add_resources(info, &resources);
9a03d28d	458	else {
fd3b0c1e	459	free_pci_root_info_res(info);
2cd6975a	460	x86_pci_root_bus_resources(busnum, &resources);
9a03d28d	461	}
fd3b0c1e	462
2cd6975a BH	463	bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd,
2cd6975a BH	464	&resources);
fd3b0c1e	465	if (bus) {
626fdfec	466	bus->subordinate = pci_scan_child_bus(bus);
fd3b0c1e YL	467	pci_set_host_bridge_release(
	468	to_pci_host_bridge(bus->bridge),
	469	release_pci_root_info, info);
	470	} else {
2cd6975a	471	pci_free_resource_list(&resources);
fd3b0c1e YL	472	__release_pci_root_info(info);
fd3b0c1e YL	473	}
626fdfec	474	}
08f1c192	475
b03e7495 JM	476	/* After the PCI-E bus has been walked and all devices discovered,
	477	* configure any settings of the fabric that might be necessary.
	478	*/
	479	if (bus) {
	480	struct pci_bus *child;
5307f6d5 SI	481	list_for_each_entry(child, &bus->children, node) {
	482	struct pci_dev *self = child->self;
	483	if (!self)
	484	continue;
	485
	486	pcie_bus_configure_settings(child, self->pcie_mpss);
	487	}
b03e7495 JM	488	}
b03e7495 JM	489
08f1c192 MBY	490	if (!bus)
	491	kfree(sd);
	492
dbb6152e	493	if (bus && node != -1) {
69e1a33f	494	#ifdef CONFIG_ACPI_NUMA
dbb6152e	495	if (pxm >= 0)
2b8c2efe BH	496	dev_printk(KERN_DEBUG, &bus->dev,
2b8c2efe BH	497	"on NUMA node %d (pxm %d)\n", node, pxm);
dbb6152e	498	#else
2b8c2efe	499	dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
69e1a33f	500	#endif
dbb6152e	501	}
62f420f8	502
69e1a33f	503	return bus;
1da177e4 LT	504	}
1da177e4 LT	505
8dd779b1	506	int __init pci_acpi_init(void)
1da177e4 LT	507	{
	508	struct pci_dev *dev = NULL;
	509
1da177e4	510	if (acpi_noirq)
b72d0db9	511	return -ENODEV;
1da177e4 LT	512
	513	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
	514	acpi_irq_penalty_init();
1da177e4	515	pcibios_enable_irq = acpi_pci_irq_enable;
87bec66b	516	pcibios_disable_irq = acpi_pci_irq_disable;
ab3b3793	517	x86_init.pci.init_irq = x86_init_noop;
1da177e4 LT	518
	519	if (pci_routeirq) {
	520	/*
	521	* PCI IRQ routing is set up by pci_enable_device(), but we
	522	* also do it here in case there are still broken drivers that
	523	* don't use pci_enable_device().
	524	*/
	525	printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
fb37fb96	526	for_each_pci_dev(dev)
1da177e4	527	acpi_pci_irq_enable(dev);
657472e9	528	}
1da177e4	529
1da177e4 LT	530	return 0;
1da177e4 LT	531	}