[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 <asm/numa.h>
#include "pci.h"

struct pci_root_info {
	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;

	if (info->res_num >= PCI_BUS_NUM_RESOURCES)
		return AE_OK;

	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;

	if (info->res_num >= PCI_BUS_NUM_RESOURCES)
		return AE_OK;

	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;

	res = &info->res[info->res_num];
	res->name = info->name;
	res->flags = flags;
	res->start = addr.minimum + addr.translation_offset;
	res->end = res->start + addr.address_length - 1;
	res->child = NULL;

	if (insert_resource(root, res)) {
		printk(KERN_ERR "PCI: Failed to allocate 0x%lx-0x%lx "
			"from %s for %s\n", (unsigned long) res->start,
			(unsigned long) res->end, root->name, info->name);
	} else {
		info->bus->resource[info->res_num] = res;
		info->res_num++;
	}
	return AE_OK;
}

static void
adjust_transparent_bridge_resources(struct pci_bus *bus)
{
	struct pci_dev *dev;

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

		if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) {
			for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
				dev->subordinate->resource[i] =
						dev->bus->resource[i - 3];
		}
	}
}

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;

	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);
	if (info.res_num)
		adjust_transparent_bridge_resources(bus);

	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: Multiple domains not supported "
		       "(dom %d, bus %d)\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_ERR "PCI: OOM, not probing PCI bus %02x\n", 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_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);

	if (!bus)
		kfree(sd);

	if (bus && node != -1) {
#ifdef CONFIG_ACPI_NUMA
		if (pxm >= 0)
			printk(KERN_DEBUG "bus %02x -> pxm %d -> node %d\n",
				busnum, pxm, node);
#else
		printk(KERN_DEBUG "bus %02x -> node %d\n",
			busnum, node);
#endif
	}

	if (bus && (pci_probe & PCI_USE__CRS))
		get_current_resources(device, busnum, domain, bus);
	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>
1da177e4 LT	7	#include "pci.h"
1da177e4 LT	8
62f420f8 GH	9	struct pci_root_info {
	10	char *name;
	11	unsigned int res_num;
	12	struct resource *res;
	13	struct pci_bus *bus;
	14	int busnum;
	15	};
	16
	17	static acpi_status
	18	resource_to_addr(struct acpi_resource *resource,
	19	struct acpi_resource_address64 *addr)
	20	{
	21	acpi_status status;
	22
	23	status = acpi_resource_to_address64(resource, addr);
	24	if (ACPI_SUCCESS(status) &&
	25	(addr->resource_type == ACPI_MEMORY_RANGE \|\|
	26	addr->resource_type == ACPI_IO_RANGE) &&
	27	addr->address_length > 0 &&
	28	addr->producer_consumer == ACPI_PRODUCER) {
	29	return AE_OK;
	30	}
	31	return AE_ERROR;
	32	}
	33
	34	static acpi_status
	35	count_resource(struct acpi_resource acpi_res, void data)
	36	{
	37	struct pci_root_info *info = data;
	38	struct acpi_resource_address64 addr;
	39	acpi_status status;
	40
3d9befd2 YL	41	if (info->res_num >= PCI_BUS_NUM_RESOURCES)
	42	return AE_OK;
	43
62f420f8 GH	44	status = resource_to_addr(acpi_res, &addr);
	45	if (ACPI_SUCCESS(status))
	46	info->res_num++;
	47	return AE_OK;
	48	}
	49
	50	static acpi_status
	51	setup_resource(struct acpi_resource acpi_res, void data)
	52	{
	53	struct pci_root_info *info = data;
	54	struct resource *res;
	55	struct acpi_resource_address64 addr;
	56	acpi_status status;
	57	unsigned long flags;
	58	struct resource *root;
	59
3d9befd2 YL	60	if (info->res_num >= PCI_BUS_NUM_RESOURCES)
	61	return AE_OK;
	62
62f420f8 GH	63	status = resource_to_addr(acpi_res, &addr);
	64	if (!ACPI_SUCCESS(status))
	65	return AE_OK;
	66
	67	if (addr.resource_type == ACPI_MEMORY_RANGE) {
	68	root = &iomem_resource;
	69	flags = IORESOURCE_MEM;
	70	if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
	71	flags \|= IORESOURCE_PREFETCH;
	72	} else if (addr.resource_type == ACPI_IO_RANGE) {
	73	root = &ioport_resource;
	74	flags = IORESOURCE_IO;
	75	} else
	76	return AE_OK;
	77
	78	res = &info->res[info->res_num];
	79	res->name = info->name;
	80	res->flags = flags;
	81	res->start = addr.minimum + addr.translation_offset;
	82	res->end = res->start + addr.address_length - 1;
	83	res->child = NULL;
	84
	85	if (insert_resource(root, res)) {
	86	printk(KERN_ERR "PCI: Failed to allocate 0x%lx-0x%lx "
	87	"from %s for %s\n", (unsigned long) res->start,
	88	(unsigned long) res->end, root->name, info->name);
	89	} else {
	90	info->bus->resource[info->res_num] = res;
	91	info->res_num++;
	92	}
	93	return AE_OK;
	94	}
	95
	96	static void
	97	adjust_transparent_bridge_resources(struct pci_bus *bus)
	98	{
	99	struct pci_dev *dev;
	100
	101	list_for_each_entry(dev, &bus->devices, bus_list) {
	102	int i;
	103	u16 class = dev->class >> 8;
	104
	105	if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) {
	106	for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
	107	dev->subordinate->resource[i] =
	108	dev->bus->resource[i - 3];
	109	}
	110	}
	111	}
	112
	113	static void
	114	get_current_resources(struct acpi_device *device, int busnum,
cb3576fa	115	int domain, struct pci_bus *bus)
62f420f8 GH	116	{
	117	struct pci_root_info info;
	118	size_t size;
	119
	120	info.bus = bus;
	121	info.res_num = 0;
	122	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
	123	&info);
	124	if (!info.res_num)
	125	return;
	126
	127	size = sizeof(info.res) info.res_num;
	128	info.res = kmalloc(size, GFP_KERNEL);
	129	if (!info.res)
	130	goto res_alloc_fail;
	131
cb3576fa	132	info.name = kmalloc(16, GFP_KERNEL);
62f420f8 GH	133	if (!info.name)
62f420f8 GH	134	goto name_alloc_fail;
cb3576fa	135	sprintf(info.name, "PCI Bus %04x:%02x", domain, busnum);
62f420f8 GH	136
	137	info.res_num = 0;
	138	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
	139	&info);
	140	if (info.res_num)
	141	adjust_transparent_bridge_resources(bus);
	142
	143	return;
	144
	145	name_alloc_fail:
	146	kfree(info.res);
	147	res_alloc_fail:
	148	return;
	149	}
	150
1da177e4 LT	151	struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
1da177e4 LT	152	{
69e1a33f	153	struct pci_bus *bus;
08f1c192	154	struct pci_sysdata *sd;
871d5f8d YL	155	int node;
871d5f8d YL	156	#ifdef CONFIG_ACPI_NUMA
08f1c192	157	int pxm;
871d5f8d	158	#endif
08f1c192	159
a79e4198 JG	160	if (domain && !pci_domains_supported) {
	161	printk(KERN_WARNING "PCI: Multiple domains not supported "
	162	"(dom %d, bus %d)\n", domain, busnum);
	163	return NULL;
	164	}
	165
871d5f8d YL	166	node = -1;
	167	#ifdef CONFIG_ACPI_NUMA
	168	pxm = acpi_get_pxm(device->handle);
	169	if (pxm >= 0)
	170	node = pxm_to_node(pxm);
	171	if (node != -1)
	172	set_mp_bus_to_node(busnum, node);
	173	else
871d5f8d	174	#endif
871d5f8d	175	node = get_mp_bus_to_node(busnum);
b755de8d YL	176
	177	if (node != -1 && !node_online(node))
	178	node = -1;
871d5f8d	179
08f1c192 MBY	180	/* Allocate per-root-bus (not per bus) arch-specific data.
	181	* TODO: leak; this memory is never freed.
	182	* It's arguable whether it's worth the trouble to care.
	183	*/
	184	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
	185	if (!sd) {
	186	printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
	187	return NULL;
	188	}
69e1a33f	189
a79e4198	190	sd->domain = domain;
871d5f8d	191	sd->node = node;
b87e81e5	192	/*
	193	* Maybe the desired pci bus has been already scanned. In such case
	194	* it is unnecessary to scan the pci bus with the given domain,busnum.
	195	*/
	196	bus = pci_find_bus(domain, busnum);
	197	if (bus) {
	198	/*
	199	* If the desired bus exits, the content of bus->sysdata will
	200	* be replaced by sd.
	201	*/
	202	memcpy(bus->sysdata, sd, sizeof(*sd));
	203	kfree(sd);
	204	} else
	205	bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
08f1c192	206
08f1c192 MBY	207	if (!bus)
	208	kfree(sd);
	209
dbb6152e	210	if (bus && node != -1) {
69e1a33f	211	#ifdef CONFIG_ACPI_NUMA
dbb6152e	212	if (pxm >= 0)
871d5f8d	213	printk(KERN_DEBUG "bus %02x -> pxm %d -> node %d\n",
dbb6152e YL	214	busnum, pxm, node);
	215	#else
	216	printk(KERN_DEBUG "bus %02x -> node %d\n",
	217	busnum, node);
69e1a33f	218	#endif
dbb6152e	219	}
62f420f8 GH	220
62f420f8 GH	221	if (bus && (pci_probe & PCI_USE__CRS))
cb3576fa	222	get_current_resources(device, busnum, domain, bus);
69e1a33f	223	return bus;
1da177e4 LT	224	}
1da177e4 LT	225
8dd779b1	226	int __init pci_acpi_init(void)
1da177e4 LT	227	{
	228	struct pci_dev *dev = NULL;
	229
	230	if (pcibios_scanned)
	231	return 0;
	232
	233	if (acpi_noirq)
	234	return 0;
	235
	236	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
	237	acpi_irq_penalty_init();
	238	pcibios_scanned++;
	239	pcibios_enable_irq = acpi_pci_irq_enable;
87bec66b	240	pcibios_disable_irq = acpi_pci_irq_disable;
1da177e4 LT	241
	242	if (pci_routeirq) {
	243	/*
	244	* PCI IRQ routing is set up by pci_enable_device(), but we
	245	* also do it here in case there are still broken drivers that
	246	* don't use pci_enable_device().
	247	*/
	248	printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
fb37fb96	249	for_each_pci_dev(dev)
1da177e4	250	acpi_pci_irq_enable(dev);
657472e9	251	}
1da177e4	252
1da177e4 LT	253	return 0;
1da177e4 LT	254	}