2 #include <linux/acpi.h>
3 #include <linux/init.h>
6 #include <linux/slab.h>
8 #include <asm/pci_x86.h>
10 struct pci_root_info
{
11 struct acpi_device
*bridge
;
19 static bool pci_use_crs
= true;
21 static int __init
set_use_crs(const struct dmi_system_id
*id
)
27 static const struct dmi_system_id pci_use_crs_table
[] __initconst
= {
28 /* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
30 .callback
= set_use_crs
,
31 .ident
= "IBM System x3800",
33 DMI_MATCH(DMI_SYS_VENDOR
, "IBM"),
34 DMI_MATCH(DMI_PRODUCT_NAME
, "x3800"),
40 void __init
pci_acpi_crs_quirks(void)
44 if (dmi_get_date(DMI_BIOS_DATE
, &year
, NULL
, NULL
) && year
< 2008)
47 dmi_check_system(pci_use_crs_table
);
50 * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
51 * takes precedence over anything we figured out above.
53 if (pci_probe
& PCI_ROOT_NO_CRS
)
55 else if (pci_probe
& PCI_USE__CRS
)
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");
65 resource_to_addr(struct acpi_resource
*resource
,
66 struct acpi_resource_address64
*addr
)
69 struct acpi_resource_memory24
*memory24
;
70 struct acpi_resource_memory32
*memory32
;
71 struct acpi_resource_fixed_memory32
*fixed_memory32
;
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;
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;
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;
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) {
112 count_resource(struct acpi_resource
*acpi_res
, void *data
)
114 struct pci_root_info
*info
= data
;
115 struct acpi_resource_address64 addr
;
118 status
= resource_to_addr(acpi_res
, &addr
);
119 if (ACPI_SUCCESS(status
))
125 setup_resource(struct acpi_resource
*acpi_res
, void *data
)
127 struct pci_root_info
*info
= data
;
128 struct resource
*res
;
129 struct acpi_resource_address64 addr
;
132 struct resource
*root
, *conflict
;
135 status
= resource_to_addr(acpi_res
, &addr
);
136 if (!ACPI_SUCCESS(status
))
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
;
150 start
= addr
.minimum
+ addr
.translation_offset
;
151 end
= addr
.maximum
+ addr
.translation_offset
;
153 res
= &info
->res
[info
->res_num
];
154 res
->name
= info
->name
;
161 dev_printk(KERN_DEBUG
, &info
->bridge
->dev
,
162 "host bridge window %pR (ignored)\n", res
);
166 conflict
= insert_resource_conflict(root
, res
);
168 dev_err(&info
->bridge
->dev
,
169 "address space collision: host bridge window %pR "
170 "conflicts with %s %pR\n",
171 res
, conflict
->name
, conflict
);
173 pci_bus_add_resource(info
->bus
, res
, 0);
175 if (addr
.translation_offset
)
176 dev_info(&info
->bridge
->dev
, "host bridge window %pR "
177 "(PCI address [%#llx-%#llx])\n",
178 res
, res
->start
- addr
.translation_offset
,
179 res
->end
- addr
.translation_offset
);
181 dev_info(&info
->bridge
->dev
,
182 "host bridge window %pR\n", res
);
188 get_current_resources(struct acpi_device
*device
, int busnum
,
189 int domain
, struct pci_bus
*bus
)
191 struct pci_root_info info
;
195 pci_bus_remove_resources(bus
);
197 info
.bridge
= device
;
200 acpi_walk_resources(device
->handle
, METHOD_NAME__CRS
, count_resource
,
205 size
= sizeof(*info
.res
) * info
.res_num
;
206 info
.res
= kmalloc(size
, GFP_KERNEL
);
210 info
.name
= kmalloc(16, GFP_KERNEL
);
212 goto name_alloc_fail
;
213 sprintf(info
.name
, "PCI Bus %04x:%02x", domain
, busnum
);
216 acpi_walk_resources(device
->handle
, METHOD_NAME__CRS
, setup_resource
,
227 struct pci_bus
* __devinit
pci_acpi_scan_root(struct acpi_device
*device
, int domain
, int busnum
)
230 struct pci_sysdata
*sd
;
232 #ifdef CONFIG_ACPI_NUMA
236 if (domain
&& !pci_domains_supported
) {
237 printk(KERN_WARNING
"pci_bus %04x:%02x: "
238 "ignored (multiple domains not supported)\n",
244 #ifdef CONFIG_ACPI_NUMA
245 pxm
= acpi_get_pxm(device
->handle
);
247 node
= pxm_to_node(pxm
);
249 set_mp_bus_to_node(busnum
, node
);
252 node
= get_mp_bus_to_node(busnum
);
254 if (node
!= -1 && !node_online(node
))
257 /* Allocate per-root-bus (not per bus) arch-specific data.
258 * TODO: leak; this memory is never freed.
259 * It's arguable whether it's worth the trouble to care.
261 sd
= kzalloc(sizeof(*sd
), GFP_KERNEL
);
263 printk(KERN_WARNING
"pci_bus %04x:%02x: "
264 "ignored (out of memory)\n", domain
, busnum
);
271 * Maybe the desired pci bus has been already scanned. In such case
272 * it is unnecessary to scan the pci bus with the given domain,busnum.
274 bus
= pci_find_bus(domain
, busnum
);
277 * If the desired bus exits, the content of bus->sysdata will
280 memcpy(bus
->sysdata
, sd
, sizeof(*sd
));
283 bus
= pci_create_bus(NULL
, busnum
, &pci_root_ops
, sd
);
285 get_current_resources(device
, busnum
, domain
, bus
);
286 bus
->subordinate
= pci_scan_child_bus(bus
);
293 if (bus
&& node
!= -1) {
294 #ifdef CONFIG_ACPI_NUMA
296 dev_printk(KERN_DEBUG
, &bus
->dev
,
297 "on NUMA node %d (pxm %d)\n", node
, pxm
);
299 dev_printk(KERN_DEBUG
, &bus
->dev
, "on NUMA node %d\n", node
);
306 int __init
pci_acpi_init(void)
308 struct pci_dev
*dev
= NULL
;
313 printk(KERN_INFO
"PCI: Using ACPI for IRQ routing\n");
314 acpi_irq_penalty_init();
315 pcibios_enable_irq
= acpi_pci_irq_enable
;
316 pcibios_disable_irq
= acpi_pci_irq_disable
;
317 x86_init
.pci
.init_irq
= x86_init_noop
;
321 * PCI IRQ routing is set up by pci_enable_device(), but we
322 * also do it here in case there are still broken drivers that
323 * don't use pci_enable_device().
325 printk(KERN_INFO
"PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
326 for_each_pci_dev(dev
)
327 acpi_pci_irq_enable(dev
);