[net-next-2.6.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 <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 acpi_status
resource_to_addr(struct acpi_resource *resource,
			struct acpi_resource_address64 *addr)
{
	acpi_status status;

	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 &&
	    addr->producer_consumer == ACPI_PRODUCER) {
		return AE_OK;
	}
	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 int
bus_has_transparent_bridge(struct pci_bus *bus)
{
	struct pci_dev *dev;

	list_for_each_entry(dev, &bus->devices, bus_list) {
		u16 class = dev->class >> 8;

		if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent)
			return true;
	}
	return false;
}

static void
align_resource(struct acpi_device *bridge, struct resource *res)
{
	int align = (res->flags & IORESOURCE_MEM) ? 16 : 4;

	/*
	 * Host bridge windows are not BARs, but the decoders on the PCI side
	 * that claim this address space have starting alignment and length
	 * constraints, so fix any obvious BIOS goofs.
	 */
	if (res->start & (align - 1)) {
		dev_printk(KERN_DEBUG, &bridge->dev,
			   "host bridge window %pR invalid; "
			   "aligning start to %d-byte boundary\n", res, align);
		res->start &= ~(align - 1);
	}
	if ((res->end + 1) & (align - 1)) {
		dev_printk(KERN_DEBUG, &bridge->dev,
			   "host bridge window %pR invalid; "
			   "aligning end to %d-byte boundary\n", res, align);
		res->end = roundup(res->end, align) - 1;
	}
}

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;
	int max_root_bus_resources = PCI_BUS_NUM_RESOURCES;
	u64 start, end;

	if (bus_has_transparent_bridge(info->bus))
		max_root_bus_resources -= 3;

	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 = start + addr.address_length - 1;
	if (info->res_num >= max_root_bus_resources) {
		if (pci_probe & PCI_USE__CRS)
			printk(KERN_WARNING "PCI: Failed to allocate "
			       "0x%lx-0x%lx from %s for %s due to _CRS "
			       "returning more than %d resource descriptors\n",
			       (unsigned long) start, (unsigned long) end,
			       root->name, info->name, max_root_bus_resources);
		return AE_OK;
	}

	res = &info->res[info->res_num];
	res->name = info->name;
	res->flags = flags;
	res->start = start;
	res->end = end;
	res->child = NULL;
	align_resource(info->bridge, res);

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

	if (insert_resource(root, res)) {
		dev_err(&info->bridge->dev,
			"can't allocate host bridge window %pR\n", res);
	} else {
		info->bus->resource[info->res_num] = res;
		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_probe & PCI_USE__CRS))
		dev_info(&device->dev,
			 "ignoring host bridge windows from ACPI; "
			 "boot with \"pci=use_crs\" to use them\n");

	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 = kmalloc(16, GFP_KERNEL);
	if (!info.name)
		goto name_alloc_fail;
	sprintf(info.name, "PCI Bus %04x:%02x", domain, busnum);

	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_device *device, int domain, int busnum)
{
	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 (pcibios_scanned)
		return 0;

	if (acpi_noirq)
		return 0;

	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
	acpi_irq_penalty_init();
	pcibios_scanned++;
	pcibios_enable_irq = acpi_pci_irq_enable;
	pcibios_disable_irq = acpi_pci_irq_disable;

	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>
69e1a33f	6	#include <asm/numa.h>
82487711	7	#include <asm/pci_x86.h>
1da177e4	8
62f420f8	9	struct pci_root_info {
42887b29	10	struct acpi_device *bridge;
62f420f8 GH	11	char *name;
	12	unsigned int res_num;
	13	struct resource *res;
	14	struct pci_bus *bus;
	15	int busnum;
	16	};
	17
	18	static acpi_status
	19	resource_to_addr(struct acpi_resource *resource,
	20	struct acpi_resource_address64 *addr)
	21	{
	22	acpi_status status;
	23
	24	status = acpi_resource_to_address64(resource, addr);
	25	if (ACPI_SUCCESS(status) &&
	26	(addr->resource_type == ACPI_MEMORY_RANGE \|\|
	27	addr->resource_type == ACPI_IO_RANGE) &&
	28	addr->address_length > 0 &&
	29	addr->producer_consumer == ACPI_PRODUCER) {
	30	return AE_OK;
	31	}
	32	return AE_ERROR;
	33	}
	34
	35	static acpi_status
	36	count_resource(struct acpi_resource acpi_res, void data)
	37	{
	38	struct pci_root_info *info = data;
	39	struct acpi_resource_address64 addr;
	40	acpi_status status;
	41
	42	status = resource_to_addr(acpi_res, &addr);
	43	if (ACPI_SUCCESS(status))
	44	info->res_num++;
	45	return AE_OK;
	46	}
	47
f9cde5ff GH	48	static int
	49	bus_has_transparent_bridge(struct pci_bus *bus)
	50	{
	51	struct pci_dev *dev;
	52
	53	list_for_each_entry(dev, &bus->devices, bus_list) {
	54	u16 class = dev->class >> 8;
	55
	56	if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent)
	57	return true;
	58	}
	59	return false;
	60	}
	61
03db42ad BH	62	static void
	63	align_resource(struct acpi_device bridge, struct resource res)
	64	{
	65	int align = (res->flags & IORESOURCE_MEM) ? 16 : 4;
	66
	67	/*
	68	* Host bridge windows are not BARs, but the decoders on the PCI side
	69	* that claim this address space have starting alignment and length
	70	* constraints, so fix any obvious BIOS goofs.
	71	*/
	72	if (res->start & (align - 1)) {
	73	dev_printk(KERN_DEBUG, &bridge->dev,
	74	"host bridge window %pR invalid; "
	75	"aligning start to %d-byte boundary\n", res, align);
	76	res->start &= ~(align - 1);
	77	}
	78	if ((res->end + 1) & (align - 1)) {
	79	dev_printk(KERN_DEBUG, &bridge->dev,
	80	"host bridge window %pR invalid; "
	81	"aligning end to %d-byte boundary\n", res, align);
	82	res->end = roundup(res->end, align) - 1;
	83	}
	84	}
	85
62f420f8 GH	86	static acpi_status
	87	setup_resource(struct acpi_resource acpi_res, void data)
	88	{
	89	struct pci_root_info *info = data;
	90	struct resource *res;
	91	struct acpi_resource_address64 addr;
	92	acpi_status status;
	93	unsigned long flags;
	94	struct resource *root;
f9cde5ff	95	int max_root_bus_resources = PCI_BUS_NUM_RESOURCES;
2cdb3f1d YL	96	u64 start, end;
	97
	98	if (bus_has_transparent_bridge(info->bus))
	99	max_root_bus_resources -= 3;
3d9befd2	100
62f420f8 GH	101	status = resource_to_addr(acpi_res, &addr);
	102	if (!ACPI_SUCCESS(status))
	103	return AE_OK;
	104
	105	if (addr.resource_type == ACPI_MEMORY_RANGE) {
	106	root = &iomem_resource;
	107	flags = IORESOURCE_MEM;
	108	if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
	109	flags \|= IORESOURCE_PREFETCH;
	110	} else if (addr.resource_type == ACPI_IO_RANGE) {
	111	root = &ioport_resource;
	112	flags = IORESOURCE_IO;
	113	} else
	114	return AE_OK;
	115
2cdb3f1d YL	116	start = addr.minimum + addr.translation_offset;
2cdb3f1d YL	117	end = start + addr.address_length - 1;
f9cde5ff	118	if (info->res_num >= max_root_bus_resources) {
f1db6fde BH	119	if (pci_probe & PCI_USE__CRS)
	120	printk(KERN_WARNING "PCI: Failed to allocate "
	121	"0x%lx-0x%lx from %s for %s due to _CRS "
	122	"returning more than %d resource descriptors\n",
	123	(unsigned long) start, (unsigned long) end,
	124	root->name, info->name, max_root_bus_resources);
f9cde5ff GH	125	return AE_OK;
	126	}
	127
2cdb3f1d YL	128	res = &info->res[info->res_num];
	129	res->name = info->name;
	130	res->flags = flags;
	131	res->start = start;
	132	res->end = end;
	133	res->child = NULL;
03db42ad	134	align_resource(info->bridge, res);
2cdb3f1d	135
f1db6fde BH	136	if (!(pci_probe & PCI_USE__CRS)) {
	137	dev_printk(KERN_DEBUG, &info->bridge->dev,
	138	"host bridge window %pR (ignored)\n", res);
	139	return AE_OK;
	140	}
	141
62f420f8	142	if (insert_resource(root, res)) {
c7dabef8 BH	143	dev_err(&info->bridge->dev,
c7dabef8 BH	144	"can't allocate host bridge window %pR\n", res);
62f420f8 GH	145	} else {
	146	info->bus->resource[info->res_num] = res;
	147	info->res_num++;
42887b29	148	if (addr.translation_offset)
c7dabef8	149	dev_info(&info->bridge->dev, "host bridge window %pR "
42887b29 BH	150	"(PCI address [%#llx-%#llx])\n",
	151	res, res->start - addr.translation_offset,
	152	res->end - addr.translation_offset);
	153	else
	154	dev_info(&info->bridge->dev,
c7dabef8	155	"host bridge window %pR\n", res);
62f420f8 GH	156	}
	157	return AE_OK;
	158	}
	159
62f420f8 GH	160	static void
62f420f8 GH	161	get_current_resources(struct acpi_device *device, int busnum,
cb3576fa	162	int domain, struct pci_bus *bus)
62f420f8 GH	163	{
	164	struct pci_root_info info;
	165	size_t size;
	166
f1db6fde BH	167	if (!(pci_probe & PCI_USE__CRS))
	168	dev_info(&device->dev,
	169	"ignoring host bridge windows from ACPI; "
	170	"boot with \"pci=use_crs\" to use them\n");
	171
42887b29	172	info.bridge = device;
62f420f8 GH	173	info.bus = bus;
	174	info.res_num = 0;
	175	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
	176	&info);
	177	if (!info.res_num)
	178	return;
	179
	180	size = sizeof(info.res) info.res_num;
	181	info.res = kmalloc(size, GFP_KERNEL);
	182	if (!info.res)
	183	goto res_alloc_fail;
	184
cb3576fa	185	info.name = kmalloc(16, GFP_KERNEL);
62f420f8 GH	186	if (!info.name)
62f420f8 GH	187	goto name_alloc_fail;
cb3576fa	188	sprintf(info.name, "PCI Bus %04x:%02x", domain, busnum);
62f420f8 GH	189
	190	info.res_num = 0;
	191	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
	192	&info);
62f420f8 GH	193
	194	return;
	195
	196	name_alloc_fail:
	197	kfree(info.res);
	198	res_alloc_fail:
	199	return;
	200	}
	201
1da177e4 LT	202	struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
1da177e4 LT	203	{
69e1a33f	204	struct pci_bus *bus;
08f1c192	205	struct pci_sysdata *sd;
871d5f8d YL	206	int node;
871d5f8d YL	207	#ifdef CONFIG_ACPI_NUMA
08f1c192	208	int pxm;
871d5f8d	209	#endif
08f1c192	210
a79e4198	211	if (domain && !pci_domains_supported) {
2a6bed83 BH	212	printk(KERN_WARNING "pci_bus %04x:%02x: "
	213	"ignored (multiple domains not supported)\n",
	214	domain, busnum);
a79e4198 JG	215	return NULL;
	216	}
	217
871d5f8d YL	218	node = -1;
	219	#ifdef CONFIG_ACPI_NUMA
	220	pxm = acpi_get_pxm(device->handle);
	221	if (pxm >= 0)
	222	node = pxm_to_node(pxm);
	223	if (node != -1)
	224	set_mp_bus_to_node(busnum, node);
	225	else
871d5f8d	226	#endif
871d5f8d	227	node = get_mp_bus_to_node(busnum);
b755de8d YL	228
	229	if (node != -1 && !node_online(node))
	230	node = -1;
871d5f8d	231
08f1c192 MBY	232	/* Allocate per-root-bus (not per bus) arch-specific data.
	233	* TODO: leak; this memory is never freed.
	234	* It's arguable whether it's worth the trouble to care.
	235	*/
	236	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
	237	if (!sd) {
2a6bed83 BH	238	printk(KERN_WARNING "pci_bus %04x:%02x: "
2a6bed83 BH	239	"ignored (out of memory)\n", domain, busnum);
08f1c192 MBY	240	return NULL;
08f1c192 MBY	241	}
69e1a33f	242
a79e4198	243	sd->domain = domain;
871d5f8d	244	sd->node = node;
b87e81e5	245	/*
	246	* Maybe the desired pci bus has been already scanned. In such case
	247	* it is unnecessary to scan the pci bus with the given domain,busnum.
	248	*/
	249	bus = pci_find_bus(domain, busnum);
	250	if (bus) {
	251	/*
	252	* If the desired bus exits, the content of bus->sysdata will
	253	* be replaced by sd.
	254	*/
	255	memcpy(bus->sysdata, sd, sizeof(*sd));
	256	kfree(sd);
626fdfec YL	257	} else {
	258	bus = pci_create_bus(NULL, busnum, &pci_root_ops, sd);
	259	if (bus) {
f1db6fde	260	get_current_resources(device, busnum, domain, bus);
626fdfec YL	261	bus->subordinate = pci_scan_child_bus(bus);
	262	}
	263	}
08f1c192	264
08f1c192 MBY	265	if (!bus)
	266	kfree(sd);
	267
dbb6152e	268	if (bus && node != -1) {
69e1a33f	269	#ifdef CONFIG_ACPI_NUMA
dbb6152e	270	if (pxm >= 0)
2b8c2efe BH	271	dev_printk(KERN_DEBUG, &bus->dev,
2b8c2efe BH	272	"on NUMA node %d (pxm %d)\n", node, pxm);
dbb6152e	273	#else
2b8c2efe	274	dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
69e1a33f	275	#endif
dbb6152e	276	}
62f420f8	277
69e1a33f	278	return bus;
1da177e4 LT	279	}
1da177e4 LT	280
8dd779b1	281	int __init pci_acpi_init(void)
1da177e4 LT	282	{
	283	struct pci_dev *dev = NULL;
	284
	285	if (pcibios_scanned)
	286	return 0;
	287
	288	if (acpi_noirq)
	289	return 0;
	290
	291	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
	292	acpi_irq_penalty_init();
	293	pcibios_scanned++;
	294	pcibios_enable_irq = acpi_pci_irq_enable;
87bec66b	295	pcibios_disable_irq = acpi_pci_irq_disable;
1da177e4 LT	296
	297	if (pci_routeirq) {
	298	/*
	299	* PCI IRQ routing is set up by pci_enable_device(), but we
	300	* also do it here in case there are still broken drivers that
	301	* don't use pci_enable_device().
	302	*/
	303	printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
fb37fb96	304	for_each_pci_dev(dev)
1da177e4	305	acpi_pci_irq_enable(dev);
657472e9	306	}
1da177e4	307
1da177e4 LT	308	return 0;
1da177e4 LT	309	}