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Diffstat (limited to 'arch/x86/pci/acpi.c')
-rw-r--r--arch/x86/pci/acpi.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
new file mode 100644
index 000000000000..0234f2831bf3
--- /dev/null
+++ b/arch/x86/pci/acpi.c
@@ -0,0 +1,278 @@
+#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(const 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[] __devinitdata = {
+/*
+ * 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;
+
+ if (info->res_num >= PCI_BUS_NUM_RESOURCES)
+ return AE_OK;
+
+ 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;
+
+ if (info->res_num >= PCI_BUS_NUM_RESOURCES)
+ return AE_OK;
+
+ 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);
+
+ if (domain && !pci_domains_supported) {
+ printk(KERN_WARNING "PCI: Multiple domains not supported "
+ "(dom %d, bus %d)\n", domain, busnum);
+ return NULL;
+ }
+
+ /* 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;
+ }
+
+ sd->domain = domain;
+ 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);