|
|
@@ -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");
|
Jiang Liu