2 #include <linux/acpi.h>
3 #include <linux/init.h>
18 resource_to_addr(struct acpi_resource *resource,
19 struct acpi_resource_address64 *addr)
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) {
35 count_resource(struct acpi_resource *acpi_res, void *data)
37 struct pci_root_info *info = data;
38 struct acpi_resource_address64 addr;
41 if (info->res_num >= PCI_BUS_NUM_RESOURCES)
44 status = resource_to_addr(acpi_res, &addr);
45 if (ACPI_SUCCESS(status))
51 setup_resource(struct acpi_resource *acpi_res, void *data)
53 struct pci_root_info *info = data;
55 struct acpi_resource_address64 addr;
58 struct resource *root;
60 if (info->res_num >= PCI_BUS_NUM_RESOURCES)
63 status = resource_to_addr(acpi_res, &addr);
64 if (!ACPI_SUCCESS(status))
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;
78 res = &info->res[info->res_num];
79 res->name = info->name;
81 res->start = addr.minimum + addr.translation_offset;
82 res->end = res->start + addr.address_length - 1;
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);
90 info->bus->resource[info->res_num] = res;
97 adjust_transparent_bridge_resources(struct pci_bus *bus)
101 list_for_each_entry(dev, &bus->devices, bus_list) {
103 u16 class = dev->class >> 8;
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];
114 get_current_resources(struct acpi_device *device, int busnum,
115 int domain, struct pci_bus *bus)
117 struct pci_root_info info;
122 acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
127 size = sizeof(*info.res) * info.res_num;
128 info.res = kmalloc(size, GFP_KERNEL);
132 info.name = kmalloc(16, GFP_KERNEL);
134 goto name_alloc_fail;
135 sprintf(info.name, "PCI Bus %04x:%02x", domain, busnum);
138 acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
141 adjust_transparent_bridge_resources(bus);
151 struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
154 struct pci_sysdata *sd;
156 #ifdef CONFIG_ACPI_NUMA
160 if (domain && !pci_domains_supported) {
161 printk(KERN_WARNING "PCI: Multiple domains not supported "
162 "(dom %d, bus %d)\n", domain, busnum);
167 #ifdef CONFIG_ACPI_NUMA
168 pxm = acpi_get_pxm(device->handle);
170 node = pxm_to_node(pxm);
172 set_mp_bus_to_node(busnum, node);
175 node = get_mp_bus_to_node(busnum);
177 if (node != -1 && !node_online(node))
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.
184 sd = kzalloc(sizeof(*sd), GFP_KERNEL);
186 printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
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.
196 bus = pci_find_bus(domain, busnum);
199 * If the desired bus exits, the content of bus->sysdata will
202 memcpy(bus->sysdata, sd, sizeof(*sd));
205 bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
210 if (bus && node != -1) {
211 #ifdef CONFIG_ACPI_NUMA
213 printk(KERN_DEBUG "bus %02x -> pxm %d -> node %d\n",
216 printk(KERN_DEBUG "bus %02x -> node %d\n",
221 if (bus && (pci_probe & PCI_USE__CRS))
222 get_current_resources(device, busnum, domain, bus);
226 int __init pci_acpi_init(void)
228 struct pci_dev *dev = NULL;
236 printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
237 acpi_irq_penalty_init();
239 pcibios_enable_irq = acpi_pci_irq_enable;
240 pcibios_disable_irq = acpi_pci_irq_disable;
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().
248 printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
249 for_each_pci_dev(dev)
250 acpi_pci_irq_enable(dev);