diff options
Diffstat (limited to 'drivers/pci/ioapic.c')
-rw-r--r-- | drivers/pci/ioapic.c | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/drivers/pci/ioapic.c b/drivers/pci/ioapic.c deleted file mode 100644 index f6219d36227f..000000000000 --- a/drivers/pci/ioapic.c +++ /dev/null @@ -1,121 +0,0 @@ -/* - * IOAPIC/IOxAPIC/IOSAPIC driver - * - * Copyright (C) 2009 Fujitsu Limited. - * (c) Copyright 2009 Hewlett-Packard Development Company, L.P. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * This driver manages PCI I/O APICs added by hotplug after boot. We try to - * claim all I/O APIC PCI devices, but those present at boot were registered - * when we parsed the ACPI MADT, so we'll fail when we try to re-register - * them. - */ - -#include <linux/pci.h> -#include <linux/module.h> -#include <linux/acpi.h> -#include <linux/slab.h> - -struct ioapic { - acpi_handle handle; - u32 gsi_base; -}; - -static int ioapic_probe(struct pci_dev *dev, const struct pci_device_id *ent) -{ - acpi_handle handle; - acpi_status status; - unsigned long long gsb; - struct ioapic *ioapic; - int ret; - char *type; - struct resource *res; - - handle = ACPI_HANDLE(&dev->dev); - if (!handle) - return -EINVAL; - - status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb); - if (ACPI_FAILURE(status)) - return -EINVAL; - - /* - * The previous code in acpiphp evaluated _MAT if _GSB failed, but - * ACPI spec 4.0 sec 6.2.2 requires _GSB for hot-pluggable I/O APICs. - */ - - ioapic = kzalloc(sizeof(*ioapic), GFP_KERNEL); - if (!ioapic) - return -ENOMEM; - - ioapic->handle = handle; - ioapic->gsi_base = (u32) gsb; - - if (dev->class == PCI_CLASS_SYSTEM_PIC_IOAPIC) - type = "IOAPIC"; - else - type = "IOxAPIC"; - - ret = pci_enable_device(dev); - if (ret < 0) - goto exit_free; - - pci_set_master(dev); - - if (pci_request_region(dev, 0, type)) - goto exit_disable; - - res = &dev->resource[0]; - if (acpi_register_ioapic(ioapic->handle, res->start, ioapic->gsi_base)) - goto exit_release; - - pci_set_drvdata(dev, ioapic); - dev_info(&dev->dev, "%s at %pR, GSI %u\n", type, res, ioapic->gsi_base); - return 0; - -exit_release: - pci_release_region(dev, 0); -exit_disable: - pci_disable_device(dev); -exit_free: - kfree(ioapic); - return -ENODEV; -} - -static void ioapic_remove(struct pci_dev *dev) -{ - struct ioapic *ioapic = pci_get_drvdata(dev); - - acpi_unregister_ioapic(ioapic->handle, ioapic->gsi_base); - pci_release_region(dev, 0); - pci_disable_device(dev); - kfree(ioapic); -} - - -static const struct pci_device_id ioapic_devices[] = { - { PCI_DEVICE_CLASS(PCI_CLASS_SYSTEM_PIC_IOAPIC, ~0) }, - { PCI_DEVICE_CLASS(PCI_CLASS_SYSTEM_PIC_IOXAPIC, ~0) }, - { } -}; -MODULE_DEVICE_TABLE(pci, ioapic_devices); - -static struct pci_driver ioapic_driver = { - .name = "ioapic", - .id_table = ioapic_devices, - .probe = ioapic_probe, - .remove = ioapic_remove, -}; - -static int __init ioapic_init(void) -{ - return pci_register_driver(&ioapic_driver); -} -module_init(ioapic_init); - -MODULE_LICENSE("GPL"); |