mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 02:40:54 +07:00
8b48463f89
Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h> inclusions and remove some inclusions of those files that aren't necessary. First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h> should not be included directly from any files that are built for CONFIG_ACPI unset, because that generally leads to build warnings about undefined symbols in !CONFIG_ACPI builds. For CONFIG_ACPI set, <linux/acpi.h> includes those files and for CONFIG_ACPI unset it provides stub ACPI symbols to be used in that case. Second, there are ordering dependencies between those files that always have to be met. Namely, it is required that <acpi/acpi_bus.h> be included prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the latter depends on are always there. And <acpi/acpi.h> which provides basic ACPICA type declarations should always be included prior to any other ACPI headers in CONFIG_ACPI builds. That also is taken care of including <linux/acpi.h> as appropriate. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Tony Luck <tony.luck@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff) Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
/*
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* IOAPIC/IOxAPIC/IOSAPIC driver
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*
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* Copyright (C) 2009 Fujitsu Limited.
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* (c) Copyright 2009 Hewlett-Packard Development Company, L.P.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/*
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* This driver manages PCI I/O APICs added by hotplug after boot. We try to
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* claim all I/O APIC PCI devices, but those present at boot were registered
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* when we parsed the ACPI MADT, so we'll fail when we try to re-register
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* them.
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*/
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#include <linux/pci.h>
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#include <linux/module.h>
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#include <linux/acpi.h>
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#include <linux/slab.h>
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struct ioapic {
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acpi_handle handle;
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u32 gsi_base;
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};
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static int ioapic_probe(struct pci_dev *dev, const struct pci_device_id *ent)
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{
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acpi_handle handle;
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acpi_status status;
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unsigned long long gsb;
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struct ioapic *ioapic;
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int ret;
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char *type;
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struct resource *res;
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handle = ACPI_HANDLE(&dev->dev);
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if (!handle)
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return -EINVAL;
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status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsb);
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if (ACPI_FAILURE(status))
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return -EINVAL;
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/*
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* The previous code in acpiphp evaluated _MAT if _GSB failed, but
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* ACPI spec 4.0 sec 6.2.2 requires _GSB for hot-pluggable I/O APICs.
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*/
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ioapic = kzalloc(sizeof(*ioapic), GFP_KERNEL);
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if (!ioapic)
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return -ENOMEM;
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ioapic->handle = handle;
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ioapic->gsi_base = (u32) gsb;
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if (dev->class == PCI_CLASS_SYSTEM_PIC_IOAPIC)
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type = "IOAPIC";
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else
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type = "IOxAPIC";
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ret = pci_enable_device(dev);
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if (ret < 0)
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goto exit_free;
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pci_set_master(dev);
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if (pci_request_region(dev, 0, type))
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goto exit_disable;
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res = &dev->resource[0];
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if (acpi_register_ioapic(ioapic->handle, res->start, ioapic->gsi_base))
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goto exit_release;
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pci_set_drvdata(dev, ioapic);
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dev_info(&dev->dev, "%s at %pR, GSI %u\n", type, res, ioapic->gsi_base);
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return 0;
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exit_release:
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pci_release_region(dev, 0);
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exit_disable:
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pci_disable_device(dev);
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exit_free:
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kfree(ioapic);
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return -ENODEV;
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}
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static void ioapic_remove(struct pci_dev *dev)
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{
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struct ioapic *ioapic = pci_get_drvdata(dev);
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acpi_unregister_ioapic(ioapic->handle, ioapic->gsi_base);
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pci_release_region(dev, 0);
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pci_disable_device(dev);
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kfree(ioapic);
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}
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static DEFINE_PCI_DEVICE_TABLE(ioapic_devices) = {
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{ PCI_DEVICE_CLASS(PCI_CLASS_SYSTEM_PIC_IOAPIC, ~0) },
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{ PCI_DEVICE_CLASS(PCI_CLASS_SYSTEM_PIC_IOXAPIC, ~0) },
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{ }
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};
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MODULE_DEVICE_TABLE(pci, ioapic_devices);
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static struct pci_driver ioapic_driver = {
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.name = "ioapic",
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.id_table = ioapic_devices,
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.probe = ioapic_probe,
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.remove = ioapic_remove,
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};
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module_pci_driver(ioapic_driver);
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MODULE_LICENSE("GPL");
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