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);