[mirror_ubuntu-focal-kernel.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"

static int __devinit can_skip_ioresource_align(struct dmi_system_id *d)
{
	pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;
	printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
	return 0;
}

static struct dmi_system_id acpi_pciprobe_dmi_table[] = {
/*
 * Systems where PCI IO resource ISA alignment can be skipped
 * when the ISA enable bit in the bridge control is not set
 */
	{
		.callback = can_skip_ioresource_align,
		.ident = "IBM System x3800",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
			DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
		},
	},
	{
		.callback = can_skip_ioresource_align,
		.ident = "IBM System x3850",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
			DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
		},
	},
	{
		.callback = can_skip_ioresource_align,
		.ident = "IBM System x3950",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
			DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
		},
	},
	{}
};

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;

	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;

	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,
			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(12, GFP_KERNEL);
	if (!info.name)
		goto name_alloc_fail;
	sprintf(info.name, "PCI Bus #%02x", 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 pxm;

	dmi_check_system(acpi_pciprobe_dmi_table);

	/* 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;
	}

	if (domain != 0) {
		printk(KERN_WARNING "PCI: Multiple domains not supported\n");
		kfree(sd);
		return NULL;
	}

	sd->node = -1;

	pxm = acpi_get_pxm(device->handle);
#ifdef CONFIG_ACPI_NUMA
	if (pxm >= 0)
		sd->node = pxm_to_node(pxm);
#endif

	bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
	if (!bus)
		kfree(sd);

#ifdef CONFIG_ACPI_NUMA
	if (bus != NULL) {
		if (pxm >= 0) {
			printk("bus %d -> pxm %d -> node %d\n",
				busnum, pxm, sd->node);
		}
	}
#endif

	if (bus && (pci_probe & PCI_USE__CRS))
		get_current_resources(device, busnum, bus);
	
	return bus;
}

extern int pci_routeirq;
static 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);
	} else
		printk(KERN_INFO "PCI: If a device doesn't work, try \"pci=routeirq\".  If it helps, post a report\n");

#ifdef CONFIG_X86_IO_APIC
	if (acpi_ioapic)
		print_IO_APIC();
#endif

	return 0;
}
subsys_initcall(pci_acpi_init);
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
036fff4c GH	9	static int __devinit can_skip_ioresource_align(struct dmi_system_id *d)
	10	{
	11	pci_probe \|= PCI_CAN_SKIP_ISA_ALIGN;
	12	printk(KERN_INFO "PCI: %s detected, can skip ISA alignment\n", d->ident);
	13	return 0;
	14	}
	15
	16	static struct dmi_system_id acpi_pciprobe_dmi_table[] = {
	17	/*
	18	* Systems where PCI IO resource ISA alignment can be skipped
	19	* when the ISA enable bit in the bridge control is not set
	20	*/
	21	{
	22	.callback = can_skip_ioresource_align,
	23	.ident = "IBM System x3800",
	24	.matches = {
	25	DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
	26	DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
	27	},
	28	},
	29	{
	30	.callback = can_skip_ioresource_align,
	31	.ident = "IBM System x3850",
	32	.matches = {
	33	DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
	34	DMI_MATCH(DMI_PRODUCT_NAME, "x3850"),
	35	},
	36	},
	37	{
	38	.callback = can_skip_ioresource_align,
	39	.ident = "IBM System x3950",
	40	.matches = {
	41	DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
	42	DMI_MATCH(DMI_PRODUCT_NAME, "x3950"),
	43	},
	44	},
	45	{}
	46	};
	47
62f420f8 GH	48	struct pci_root_info {
	49	char *name;
	50	unsigned int res_num;
	51	struct resource *res;
	52	struct pci_bus *bus;
	53	int busnum;
	54	};
	55
	56	static acpi_status
	57	resource_to_addr(struct acpi_resource *resource,
	58	struct acpi_resource_address64 *addr)
	59	{
	60	acpi_status status;
	61
	62	status = acpi_resource_to_address64(resource, addr);
	63	if (ACPI_SUCCESS(status) &&
	64	(addr->resource_type == ACPI_MEMORY_RANGE \|\|
	65	addr->resource_type == ACPI_IO_RANGE) &&
	66	addr->address_length > 0 &&
	67	addr->producer_consumer == ACPI_PRODUCER) {
	68	return AE_OK;
	69	}
	70	return AE_ERROR;
	71	}
	72
	73	static acpi_status
	74	count_resource(struct acpi_resource acpi_res, void data)
	75	{
	76	struct pci_root_info *info = data;
	77	struct acpi_resource_address64 addr;
	78	acpi_status status;
	79
	80	status = resource_to_addr(acpi_res, &addr);
	81	if (ACPI_SUCCESS(status))
	82	info->res_num++;
	83	return AE_OK;
	84	}
	85
	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;
	95
	96	status = resource_to_addr(acpi_res, &addr);
	97	if (!ACPI_SUCCESS(status))
	98	return AE_OK;
	99
	100	if (addr.resource_type == ACPI_MEMORY_RANGE) {
	101	root = &iomem_resource;
	102	flags = IORESOURCE_MEM;
	103	if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
	104	flags \|= IORESOURCE_PREFETCH;
	105	} else if (addr.resource_type == ACPI_IO_RANGE) {
	106	root = &ioport_resource;
	107	flags = IORESOURCE_IO;
	108	} else
	109	return AE_OK;
	110
	111	res = &info->res[info->res_num];
112	res->name = info->name;
113	res->flags = flags;
114	res->start = addr.minimum + addr.translation_offset;
115	res->end = res->start + addr.address_length - 1;
116	res->child = NULL;
117
118	if (insert_resource(root, res)) {
119	printk(KERN_ERR "PCI: Failed to allocate 0x%lx-0x%lx "
120	"from %s for %s\n", (unsigned long) res->start,
121	(unsigned long) res->end, root->name, info->name);
122	} else {
123	info->bus->resource[info->res_num] = res;
124	info->res_num++;
125	}
126	return AE_OK;
127	}
128
129	static void
130	adjust_transparent_bridge_resources(struct pci_bus *bus)
131	{
132	struct pci_dev *dev;
133
134	list_for_each_entry(dev, &bus->devices, bus_list) {
135	int i;
136	u16 class = dev->class >> 8;
137
138	if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) {
139	for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
140	dev->subordinate->resource[i] =
141	dev->bus->resource[i - 3];
142	}
143	}
144	}
145
146	static void
147	get_current_resources(struct acpi_device *device, int busnum,
148	struct pci_bus *bus)
149	{
150	struct pci_root_info info;
151	size_t size;
152
153	info.bus = bus;
154	info.res_num = 0;
155	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
156	&info);
157	if (!info.res_num)
158	return;
159
160	size = sizeof(info.res) info.res_num;
161	info.res = kmalloc(size, GFP_KERNEL);
162	if (!info.res)
163	goto res_alloc_fail;
164
165	info.name = kmalloc(12, GFP_KERNEL);
166	if (!info.name)
167	goto name_alloc_fail;
168	sprintf(info.name, "PCI Bus #%02x", busnum);
169
170	info.res_num = 0;
171	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
172	&info);
173	if (info.res_num)
174	adjust_transparent_bridge_resources(bus);
175
176	return;
177
178	name_alloc_fail:
179	kfree(info.res);
180	res_alloc_fail:
181	return;
182	}
183
1da177e4 LT	184	struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
1da177e4 LT	185	{
69e1a33f	186	struct pci_bus *bus;
08f1c192 MBY	187	struct pci_sysdata *sd;
	188	int pxm;
	189
036fff4c GH	190	dmi_check_system(acpi_pciprobe_dmi_table);
036fff4c GH	191
08f1c192 MBY	192	/* Allocate per-root-bus (not per bus) arch-specific data.
	193	* TODO: leak; this memory is never freed.
	194	* It's arguable whether it's worth the trouble to care.
	195	*/
	196	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
	197	if (!sd) {
	198	printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
	199	return NULL;
	200	}
69e1a33f	201
1da177e4 LT	202	if (domain != 0) {
1da177e4 LT	203	printk(KERN_WARNING "PCI: Multiple domains not supported\n");
08f1c192	204	kfree(sd);
1da177e4 LT	205	return NULL;
	206	}
	207
08f1c192 MBY	208	sd->node = -1;
	209
	210	pxm = acpi_get_pxm(device->handle);
	211	#ifdef CONFIG_ACPI_NUMA
	212	if (pxm >= 0)
	213	sd->node = pxm_to_node(pxm);
	214	#endif
	215
	216	bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
	217	if (!bus)
	218	kfree(sd);
	219
69e1a33f AK	220	#ifdef CONFIG_ACPI_NUMA
69e1a33f AK	221	if (bus != NULL) {
69e1a33f	222	if (pxm >= 0) {
08f1c192 MBY	223	printk("bus %d -> pxm %d -> node %d\n",
08f1c192 MBY	224	busnum, pxm, sd->node);
69e1a33f AK	225	}
	226	}
	227	#endif
62f420f8 GH	228
	229	if (bus && (pci_probe & PCI_USE__CRS))
	230	get_current_resources(device, busnum, bus);
69e1a33f AK	231
69e1a33f AK	232	return bus;
1da177e4 LT	233	}
	234
	235	extern int pci_routeirq;
	236	static int __init pci_acpi_init(void)
	237	{
	238	struct pci_dev *dev = NULL;
	239
	240	if (pcibios_scanned)
	241	return 0;
	242
	243	if (acpi_noirq)
	244	return 0;
	245
	246	printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
	247	acpi_irq_penalty_init();
	248	pcibios_scanned++;
	249	pcibios_enable_irq = acpi_pci_irq_enable;
87bec66b	250	pcibios_disable_irq = acpi_pci_irq_disable;
1da177e4 LT	251
	252	if (pci_routeirq) {
	253	/*
	254	* PCI IRQ routing is set up by pci_enable_device(), but we
	255	* also do it here in case there are still broken drivers that
	256	* don't use pci_enable_device().
	257	*/
	258	printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
fb37fb96	259	for_each_pci_dev(dev)
1da177e4 LT	260	acpi_pci_irq_enable(dev);
	261	} else
	262	printk(KERN_INFO "PCI: If a device doesn't work, try \"pci=routeirq\". If it helps, post a report\n");
	263
	264	#ifdef CONFIG_X86_IO_APIC
	265	if (acpi_ioapic)
	266	print_IO_APIC();
	267	#endif
	268
	269	return 0;
	270	}
	271	subsys_initcall(pci_acpi_init);