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"),
37 /* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
38 /* 2006 AMD HT/VIA system with two host bridges */
40 .callback
= set_use_crs
,
41 .ident
= "ASRock ALiveSATA2-GLAN",
43 DMI_MATCH(DMI_PRODUCT_NAME
, "ALiveSATA2-GLAN"),
49 void __init
pci_acpi_crs_quirks(void)
53 if (dmi_get_date(DMI_BIOS_DATE
, &year
, NULL
, NULL
) && year
< 2008)
56 dmi_check_system(pci_use_crs_table
);
59 * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
60 * takes precedence over anything we figured out above.
62 if (pci_probe
& PCI_ROOT_NO_CRS
)
64 else if (pci_probe
& PCI_USE__CRS
)
67 printk(KERN_INFO
"PCI: %s host bridge windows from ACPI; "
68 "if necessary, use \"pci=%s\" and report a bug\n",
69 pci_use_crs
? "Using" : "Ignoring",
70 pci_use_crs
? "nocrs" : "use_crs");
74 resource_to_addr(struct acpi_resource
*resource
,
75 struct acpi_resource_address64
*addr
)
78 struct acpi_resource_memory24
*memory24
;
79 struct acpi_resource_memory32
*memory32
;
80 struct acpi_resource_fixed_memory32
*fixed_memory32
;
82 memset(addr
, 0, sizeof(*addr
));
83 switch (resource
->type
) {
84 case ACPI_RESOURCE_TYPE_MEMORY24
:
85 memory24
= &resource
->data
.memory24
;
86 addr
->resource_type
= ACPI_MEMORY_RANGE
;
87 addr
->minimum
= memory24
->minimum
;
88 addr
->address_length
= memory24
->address_length
;
89 addr
->maximum
= addr
->minimum
+ addr
->address_length
- 1;
91 case ACPI_RESOURCE_TYPE_MEMORY32
:
92 memory32
= &resource
->data
.memory32
;
93 addr
->resource_type
= ACPI_MEMORY_RANGE
;
94 addr
->minimum
= memory32
->minimum
;
95 addr
->address_length
= memory32
->address_length
;
96 addr
->maximum
= addr
->minimum
+ addr
->address_length
- 1;
98 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32
:
99 fixed_memory32
= &resource
->data
.fixed_memory32
;
100 addr
->resource_type
= ACPI_MEMORY_RANGE
;
101 addr
->minimum
= fixed_memory32
->address
;
102 addr
->address_length
= fixed_memory32
->address_length
;
103 addr
->maximum
= addr
->minimum
+ addr
->address_length
- 1;
105 case ACPI_RESOURCE_TYPE_ADDRESS16
:
106 case ACPI_RESOURCE_TYPE_ADDRESS32
:
107 case ACPI_RESOURCE_TYPE_ADDRESS64
:
108 status
= acpi_resource_to_address64(resource
, addr
);
109 if (ACPI_SUCCESS(status
) &&
110 (addr
->resource_type
== ACPI_MEMORY_RANGE
||
111 addr
->resource_type
== ACPI_IO_RANGE
) &&
112 addr
->address_length
> 0) {
121 count_resource(struct acpi_resource
*acpi_res
, void *data
)
123 struct pci_root_info
*info
= data
;
124 struct acpi_resource_address64 addr
;
127 status
= resource_to_addr(acpi_res
, &addr
);
128 if (ACPI_SUCCESS(status
))
134 setup_resource(struct acpi_resource
*acpi_res
, void *data
)
136 struct pci_root_info
*info
= data
;
137 struct resource
*res
;
138 struct acpi_resource_address64 addr
;
143 status
= resource_to_addr(acpi_res
, &addr
);
144 if (!ACPI_SUCCESS(status
))
147 if (addr
.resource_type
== ACPI_MEMORY_RANGE
) {
148 flags
= IORESOURCE_MEM
;
149 if (addr
.info
.mem
.caching
== ACPI_PREFETCHABLE_MEMORY
)
150 flags
|= IORESOURCE_PREFETCH
;
151 } else if (addr
.resource_type
== ACPI_IO_RANGE
) {
152 flags
= IORESOURCE_IO
;
156 start
= addr
.minimum
+ addr
.translation_offset
;
157 end
= addr
.maximum
+ addr
.translation_offset
;
159 res
= &info
->res
[info
->res_num
];
160 res
->name
= info
->name
;
167 dev_printk(KERN_DEBUG
, &info
->bridge
->dev
,
168 "host bridge window %pR (ignored)\n", res
);
173 if (addr
.translation_offset
)
174 dev_info(&info
->bridge
->dev
, "host bridge window %pR "
175 "(PCI address [%#llx-%#llx])\n",
176 res
, res
->start
- addr
.translation_offset
,
177 res
->end
- addr
.translation_offset
);
179 dev_info(&info
->bridge
->dev
, "host bridge window %pR\n", res
);
184 static bool resource_contains(struct resource
*res
, resource_size_t point
)
186 if (res
->start
<= point
&& point
<= res
->end
)
191 static void coalesce_windows(struct pci_root_info
*info
, unsigned long type
)
194 struct resource
*res1
, *res2
;
196 for (i
= 0; i
< info
->res_num
; i
++) {
197 res1
= &info
->res
[i
];
198 if (!(res1
->flags
& type
))
201 for (j
= i
+ 1; j
< info
->res_num
; j
++) {
202 res2
= &info
->res
[j
];
203 if (!(res2
->flags
& type
))
207 * I don't like throwing away windows because then
208 * our resources no longer match the ACPI _CRS, but
209 * the kernel resource tree doesn't allow overlaps.
211 if (resource_contains(res1
, res2
->start
) ||
212 resource_contains(res1
, res2
->end
) ||
213 resource_contains(res2
, res1
->start
) ||
214 resource_contains(res2
, res1
->end
)) {
215 res1
->start
= min(res1
->start
, res2
->start
);
216 res1
->end
= max(res1
->end
, res2
->end
);
217 dev_info(&info
->bridge
->dev
,
218 "host bridge window expanded to %pR; %pR ignored\n",
226 static void add_resources(struct pci_root_info
*info
)
229 struct resource
*res
, *root
, *conflict
;
234 coalesce_windows(info
, IORESOURCE_MEM
);
235 coalesce_windows(info
, IORESOURCE_IO
);
237 for (i
= 0; i
< info
->res_num
; i
++) {
240 if (res
->flags
& IORESOURCE_MEM
)
241 root
= &iomem_resource
;
242 else if (res
->flags
& IORESOURCE_IO
)
243 root
= &ioport_resource
;
247 conflict
= insert_resource_conflict(root
, res
);
249 dev_err(&info
->bridge
->dev
,
250 "address space collision: host bridge window %pR "
251 "conflicts with %s %pR\n",
252 res
, conflict
->name
, conflict
);
254 pci_bus_add_resource(info
->bus
, res
, 0);
259 get_current_resources(struct acpi_device
*device
, int busnum
,
260 int domain
, struct pci_bus
*bus
)
262 struct pci_root_info info
;
266 pci_bus_remove_resources(bus
);
268 info
.bridge
= device
;
271 acpi_walk_resources(device
->handle
, METHOD_NAME__CRS
, count_resource
,
276 size
= sizeof(*info
.res
) * info
.res_num
;
277 info
.res
= kmalloc(size
, GFP_KERNEL
);
281 info
.name
= kasprintf(GFP_KERNEL
, "PCI Bus %04x:%02x", domain
, busnum
);
283 goto name_alloc_fail
;
286 acpi_walk_resources(device
->handle
, METHOD_NAME__CRS
, setup_resource
,
289 add_resources(&info
);
298 struct pci_bus
* __devinit
pci_acpi_scan_root(struct acpi_pci_root
*root
)
300 struct acpi_device
*device
= root
->device
;
301 int domain
= root
->segment
;
302 int busnum
= root
->secondary
.start
;
304 struct pci_sysdata
*sd
;
306 #ifdef CONFIG_ACPI_NUMA
310 if (domain
&& !pci_domains_supported
) {
311 printk(KERN_WARNING
"pci_bus %04x:%02x: "
312 "ignored (multiple domains not supported)\n",
318 #ifdef CONFIG_ACPI_NUMA
319 pxm
= acpi_get_pxm(device
->handle
);
321 node
= pxm_to_node(pxm
);
323 set_mp_bus_to_node(busnum
, node
);
326 node
= get_mp_bus_to_node(busnum
);
328 if (node
!= -1 && !node_online(node
))
331 /* Allocate per-root-bus (not per bus) arch-specific data.
332 * TODO: leak; this memory is never freed.
333 * It's arguable whether it's worth the trouble to care.
335 sd
= kzalloc(sizeof(*sd
), GFP_KERNEL
);
337 printk(KERN_WARNING
"pci_bus %04x:%02x: "
338 "ignored (out of memory)\n", domain
, busnum
);
345 * Maybe the desired pci bus has been already scanned. In such case
346 * it is unnecessary to scan the pci bus with the given domain,busnum.
348 bus
= pci_find_bus(domain
, busnum
);
351 * If the desired bus exits, the content of bus->sysdata will
354 memcpy(bus
->sysdata
, sd
, sizeof(*sd
));
357 bus
= pci_create_bus(NULL
, busnum
, &pci_root_ops
, sd
);
359 get_current_resources(device
, busnum
, domain
, bus
);
360 bus
->subordinate
= pci_scan_child_bus(bus
);
367 if (bus
&& node
!= -1) {
368 #ifdef CONFIG_ACPI_NUMA
370 dev_printk(KERN_DEBUG
, &bus
->dev
,
371 "on NUMA node %d (pxm %d)\n", node
, pxm
);
373 dev_printk(KERN_DEBUG
, &bus
->dev
, "on NUMA node %d\n", node
);
380 int __init
pci_acpi_init(void)
382 struct pci_dev
*dev
= NULL
;
387 printk(KERN_INFO
"PCI: Using ACPI for IRQ routing\n");
388 acpi_irq_penalty_init();
389 pcibios_enable_irq
= acpi_pci_irq_enable
;
390 pcibios_disable_irq
= acpi_pci_irq_disable
;
391 x86_init
.pci
.init_irq
= x86_init_noop
;
395 * PCI IRQ routing is set up by pci_enable_device(), but we
396 * also do it here in case there are still broken drivers that
397 * don't use pci_enable_device().
399 printk(KERN_INFO
"PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
400 for_each_pci_dev(dev
)
401 acpi_pci_irq_enable(dev
);