[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;
	unsigned int res_num;
	struct resource *res;
	struct pci_bus *bus;
	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 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"),
		},
	},
	{}
};

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;
	struct resource *root, *conflict;
	u64 start, end;

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

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

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

	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;
	}

	conflict = insert_resource_conflict(root, res);
	if (conflict) {
		dev_err(&info->bridge->dev,
			"address space collision: host bridge window %pR "
			"conflicts with %s %pR\n",
			res, conflict->name, conflict);
	} else {
		pci_bus_add_resource(info->bus, res, 0);
		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
get_current_resources(struct acpi_device *device, int busnum,
			int domain, struct pci_bus *bus)
{
	struct pci_root_info info;
	size_t size;

	if (pci_use_crs)
		pci_bus_remove_resources(bus);

	info.bridge = device;
	info.bus = bus;
	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 = kmalloc(size, GFP_KERNEL);
	if (!info.res)
		goto res_alloc_fail;

	info.name = kasprintf(GFP_KERNEL, "PCI Bus %04x:%02x", domain, busnum);
	if (!info.name)
		goto name_alloc_fail;

	info.res_num = 0;
	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
				&info);

	return;

name_alloc_fail:
	kfree(info.res);
res_alloc_fail:
	return;
}

struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
{
	struct acpi_device *device = root->device;
	int domain = root->segment;
	int busnum = root->secondary.start;
	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;
	/*
	 * 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(sd);
	} else {
		bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd);
		if (bus) {
			get_current_resources(device, busnum, domain, bus);
			bus->subordinate = pci_scan_child_bus(bus);
		}
	}

	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;
	15	struct pci_bus *bus;
	16	int busnum;
	17	};
	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
	27	static const struct dmi_system_id pci_use_crs_table[] __initconst = {
	28	/* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
	29	{
	30	.callback = set_use_crs,
	31	.ident = "IBM System x3800",
	32	.matches = {
	33	DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
	34	DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
	35	},
	36	},
	37	{}
	38	};
	39
	40	void __init pci_acpi_crs_quirks(void)
	41	{
	42	int year;
	43
	44	if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
	45	pci_use_crs = false;
	46
	47	dmi_check_system(pci_use_crs_table);
	48
	49	/*
	50	* If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
	51	* takes precedence over anything we figured out above.
	52	*/
	53	if (pci_probe & PCI_ROOT_NO_CRS)
	54	pci_use_crs = false;
	55	else if (pci_probe & PCI_USE__CRS)
	56	pci_use_crs = true;
	57
	58	printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
	59	"if necessary, use \"pci=%s\" and report a bug\n",
	60	pci_use_crs ? "Using" : "Ignoring",
	61	pci_use_crs ? "nocrs" : "use_crs");
	62	}
	63
62f420f8 GH	64	static acpi_status
	65	resource_to_addr(struct acpi_resource *resource,
	66	struct acpi_resource_address64 *addr)
	67	{
	68	acpi_status status;
66528fdd BH	69	struct acpi_resource_memory24 *memory24;
	70	struct acpi_resource_memory32 *memory32;
	71	struct acpi_resource_fixed_memory32 *fixed_memory32;
62f420f8	72
66528fdd BH	73	memset(addr, 0, sizeof(*addr));
	74	switch (resource->type) {
	75	case ACPI_RESOURCE_TYPE_MEMORY24:
	76	memory24 = &resource->data.memory24;
	77	addr->resource_type = ACPI_MEMORY_RANGE;
	78	addr->minimum = memory24->minimum;
	79	addr->address_length = memory24->address_length;
	80	addr->maximum = addr->minimum + addr->address_length - 1;
62f420f8	81	return AE_OK;
66528fdd BH	82	case ACPI_RESOURCE_TYPE_MEMORY32:
	83	memory32 = &resource->data.memory32;
	84	addr->resource_type = ACPI_MEMORY_RANGE;
	85	addr->minimum = memory32->minimum;
	86	addr->address_length = memory32->address_length;
	87	addr->maximum = addr->minimum + addr->address_length - 1;
	88	return AE_OK;
	89	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
	90	fixed_memory32 = &resource->data.fixed_memory32;
	91	addr->resource_type = ACPI_MEMORY_RANGE;
	92	addr->minimum = fixed_memory32->address;
	93	addr->address_length = fixed_memory32->address_length;
	94	addr->maximum = addr->minimum + addr->address_length - 1;
	95	return AE_OK;
	96	case ACPI_RESOURCE_TYPE_ADDRESS16:
	97	case ACPI_RESOURCE_TYPE_ADDRESS32:
	98	case ACPI_RESOURCE_TYPE_ADDRESS64:
	99	status = acpi_resource_to_address64(resource, addr);
	100	if (ACPI_SUCCESS(status) &&
	101	(addr->resource_type == ACPI_MEMORY_RANGE \|\|
	102	addr->resource_type == ACPI_IO_RANGE) &&
	103	addr->address_length > 0) {
	104	return AE_OK;
	105	}
	106	break;
62f420f8 GH	107	}
	108	return AE_ERROR;
	109	}
	110
	111	static acpi_status
	112	count_resource(struct acpi_resource acpi_res, void data)
	113	{
	114	struct pci_root_info *info = data;
	115	struct acpi_resource_address64 addr;
	116	acpi_status status;
	117
	118	status = resource_to_addr(acpi_res, &addr);
	119	if (ACPI_SUCCESS(status))
	120	info->res_num++;
	121	return AE_OK;
	122	}
	123
	124	static acpi_status
	125	setup_resource(struct acpi_resource acpi_res, void data)
	126	{
	127	struct pci_root_info *info = data;
	128	struct resource *res;
	129	struct acpi_resource_address64 addr;
	130	acpi_status status;
	131	unsigned long flags;
eb9fc8ef	132	struct resource root, conflict;
48728e07	133	u64 start, end;
2cdb3f1d	134
62f420f8 GH	135	status = resource_to_addr(acpi_res, &addr);
	136	if (!ACPI_SUCCESS(status))
	137	return AE_OK;
	138
	139	if (addr.resource_type == ACPI_MEMORY_RANGE) {
	140	root = &iomem_resource;
	141	flags = IORESOURCE_MEM;
	142	if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
	143	flags \|= IORESOURCE_PREFETCH;
	144	} else if (addr.resource_type == ACPI_IO_RANGE) {
	145	root = &ioport_resource;
	146	flags = IORESOURCE_IO;
	147	} else
	148	return AE_OK;
	149
2cdb3f1d	150	start = addr.minimum + addr.translation_offset;
48728e07	151	end = addr.maximum + addr.translation_offset;
f9cde5ff	152
2cdb3f1d YL	153	res = &info->res[info->res_num];
	154	res->name = info->name;
	155	res->flags = flags;
	156	res->start = start;
	157	res->end = end;
	158	res->child = NULL;
	159
7bc5e3f2	160	if (!pci_use_crs) {
f1db6fde BH	161	dev_printk(KERN_DEBUG, &info->bridge->dev,
	162	"host bridge window %pR (ignored)\n", res);
	163	return AE_OK;
	164	}
	165
eb9fc8ef BH	166	conflict = insert_resource_conflict(root, res);
eb9fc8ef BH	167	if (conflict) {
c7dabef8	168	dev_err(&info->bridge->dev,
eb9fc8ef BH	169	"address space collision: host bridge window %pR "
	170	"conflicts with %s %pR\n",
	171	res, conflict->name, conflict);
62f420f8	172	} else {
2fe2abf8	173	pci_bus_add_resource(info->bus, res, 0);
62f420f8	174	info->res_num++;
42887b29	175	if (addr.translation_offset)
c7dabef8	176	dev_info(&info->bridge->dev, "host bridge window %pR "
42887b29 BH	177	"(PCI address [%#llx-%#llx])\n",
	178	res, res->start - addr.translation_offset,
	179	res->end - addr.translation_offset);
	180	else
	181	dev_info(&info->bridge->dev,
c7dabef8	182	"host bridge window %pR\n", res);
62f420f8 GH	183	}
	184	return AE_OK;
	185	}
	186
62f420f8 GH	187	static void
62f420f8 GH	188	get_current_resources(struct acpi_device *device, int busnum,
cb3576fa	189	int domain, struct pci_bus *bus)
62f420f8 GH	190	{
	191	struct pci_root_info info;
	192	size_t size;
	193
7bc5e3f2	194	if (pci_use_crs)
2fe2abf8	195	pci_bus_remove_resources(bus);
f1db6fde	196
42887b29	197	info.bridge = device;
62f420f8 GH	198	info.bus = bus;
	199	info.res_num = 0;
	200	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
	201	&info);
	202	if (!info.res_num)
	203	return;
	204
	205	size = sizeof(info.res) info.res_num;
	206	info.res = kmalloc(size, GFP_KERNEL);
	207	if (!info.res)
	208	goto res_alloc_fail;
	209
b46fc5f2	210	info.name = kasprintf(GFP_KERNEL, "PCI Bus %04x:%02x", domain, busnum);
62f420f8 GH	211	if (!info.name)
62f420f8 GH	212	goto name_alloc_fail;
62f420f8 GH	213
	214	info.res_num = 0;
	215	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
	216	&info);
62f420f8 GH	217
	218	return;
	219
	220	name_alloc_fail:
	221	kfree(info.res);
	222	res_alloc_fail:
	223	return;
	224	}
	225
57283776	226	struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
1da177e4	227	{
57283776 BH	228	struct acpi_device *device = root->device;
	229	int domain = root->segment;
	230	int busnum = root->secondary.start;
69e1a33f	231	struct pci_bus *bus;
08f1c192	232	struct pci_sysdata *sd;
871d5f8d YL	233	int node;
871d5f8d YL	234	#ifdef CONFIG_ACPI_NUMA
08f1c192	235	int pxm;
871d5f8d	236	#endif
08f1c192	237
a79e4198	238	if (domain && !pci_domains_supported) {
2a6bed83 BH	239	printk(KERN_WARNING "pci_bus %04x:%02x: "
	240	"ignored (multiple domains not supported)\n",
	241	domain, busnum);
a79e4198 JG	242	return NULL;
	243	}
	244
871d5f8d YL	245	node = -1;
	246	#ifdef CONFIG_ACPI_NUMA
	247	pxm = acpi_get_pxm(device->handle);
	248	if (pxm >= 0)
	249	node = pxm_to_node(pxm);
	250	if (node != -1)
	251	set_mp_bus_to_node(busnum, node);
	252	else
871d5f8d	253	#endif
871d5f8d	254	node = get_mp_bus_to_node(busnum);
b755de8d YL	255
	256	if (node != -1 && !node_online(node))
	257	node = -1;
871d5f8d	258
08f1c192 MBY	259	/* Allocate per-root-bus (not per bus) arch-specific data.
	260	* TODO: leak; this memory is never freed.
	261	* It's arguable whether it's worth the trouble to care.
	262	*/
	263	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
	264	if (!sd) {
2a6bed83 BH	265	printk(KERN_WARNING "pci_bus %04x:%02x: "
2a6bed83 BH	266	"ignored (out of memory)\n", domain, busnum);
08f1c192 MBY	267	return NULL;
08f1c192 MBY	268	}
69e1a33f	269
a79e4198	270	sd->domain = domain;
871d5f8d	271	sd->node = node;
b87e81e5	272	/*
	273	* Maybe the desired pci bus has been already scanned. In such case
	274	* it is unnecessary to scan the pci bus with the given domain,busnum.
	275	*/
	276	bus = pci_find_bus(domain, busnum);
	277	if (bus) {
	278	/*
	279	* If the desired bus exits, the content of bus->sysdata will
	280	* be replaced by sd.
	281	*/
	282	memcpy(bus->sysdata, sd, sizeof(*sd));
	283	kfree(sd);
626fdfec YL	284	} else {
	285	bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd);
	286	if (bus) {
f1db6fde	287	get_current_resources(device, busnum, domain, bus);
626fdfec YL	288	bus->subordinate = pci_scan_child_bus(bus);
	289	}
	290	}
08f1c192	291
08f1c192 MBY	292	if (!bus)
	293	kfree(sd);
	294
dbb6152e	295	if (bus && node != -1) {
69e1a33f	296	#ifdef CONFIG_ACPI_NUMA
dbb6152e	297	if (pxm >= 0)
2b8c2efe BH	298	dev_printk(KERN_DEBUG, &bus->dev,
2b8c2efe BH	299	"on NUMA node %d (pxm %d)\n", node, pxm);
dbb6152e	300	#else
2b8c2efe	301	dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
69e1a33f	302	#endif
dbb6152e	303	}
62f420f8	304
69e1a33f	305	return bus;
1da177e4 LT	306	}
1da177e4 LT	307
8dd779b1	308	int __init pci_acpi_init(void)
1da177e4 LT	309	{
	310	struct pci_dev *dev = NULL;
	311
1da177e4	312	if (acpi_noirq)
b72d0db9	313	return -ENODEV;
1da177e4 LT	314
	315	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
	316	acpi_irq_penalty_init();
1da177e4	317	pcibios_enable_irq = acpi_pci_irq_enable;
87bec66b	318	pcibios_disable_irq = acpi_pci_irq_disable;
ab3b3793	319	x86_init.pci.init_irq = x86_init_noop;
1da177e4 LT	320
	321	if (pci_routeirq) {
	322	/*
	323	* PCI IRQ routing is set up by pci_enable_device(), but we
	324	* also do it here in case there are still broken drivers that
	325	* don't use pci_enable_device().
	326	*/
	327	printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
fb37fb96	328	for_each_pci_dev(dev)
1da177e4	329	acpi_pci_irq_enable(dev);
657472e9	330	}
1da177e4	331
1da177e4 LT	332	return 0;
1da177e4 LT	333	}