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![Jiang Liu](/assets/img/avatar_default.png)
Now we have converted to hierarchical irqdomains, so clean up unused code. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Tested-by: Joerg Roedel <jroedel@suse.de> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: David Cohen <david.a.cohen@linux.intel.com> Cc: Sander Eikelenboom <linux@eikelenboom.it> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: iommu@lists.linux-foundation.org Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Joerg Roedel <joro@8bytes.org> Link: http://lkml.kernel.org/r/1428978610-28986-10-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
182 lines
3.9 KiB
C
182 lines
3.9 KiB
C
#include <linux/seq_file.h>
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#include <linux/cpumask.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/msi.h>
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#include <linux/irq.h>
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#include <linux/pci.h>
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#include <linux/irqdomain.h>
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#include <asm/hw_irq.h>
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#include <asm/irq_remapping.h>
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#include <asm/processor.h>
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#include <asm/x86_init.h>
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#include <asm/apic.h>
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#include <asm/hpet.h>
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#include "irq_remapping.h"
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int irq_remapping_enabled;
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int irq_remap_broken;
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int disable_sourceid_checking;
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int no_x2apic_optout;
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static int disable_irq_remap;
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static struct irq_remap_ops *remap_ops;
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static void irq_remapping_disable_io_apic(void)
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{
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/*
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* With interrupt-remapping, for now we will use virtual wire A
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* mode, as virtual wire B is little complex (need to configure
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* both IOAPIC RTE as well as interrupt-remapping table entry).
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* As this gets called during crash dump, keep this simple for
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* now.
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*/
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if (cpu_has_apic || apic_from_smp_config())
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disconnect_bsp_APIC(0);
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}
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static void __init irq_remapping_modify_x86_ops(void)
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{
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x86_io_apic_ops.disable = irq_remapping_disable_io_apic;
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}
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static __init int setup_nointremap(char *str)
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{
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disable_irq_remap = 1;
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return 0;
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}
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early_param("nointremap", setup_nointremap);
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static __init int setup_irqremap(char *str)
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{
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if (!str)
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return -EINVAL;
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while (*str) {
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if (!strncmp(str, "on", 2))
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disable_irq_remap = 0;
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else if (!strncmp(str, "off", 3))
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disable_irq_remap = 1;
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else if (!strncmp(str, "nosid", 5))
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disable_sourceid_checking = 1;
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else if (!strncmp(str, "no_x2apic_optout", 16))
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no_x2apic_optout = 1;
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str += strcspn(str, ",");
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while (*str == ',')
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str++;
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}
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return 0;
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}
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early_param("intremap", setup_irqremap);
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void set_irq_remapping_broken(void)
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{
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irq_remap_broken = 1;
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}
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int __init irq_remapping_prepare(void)
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{
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if (disable_irq_remap)
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return -ENOSYS;
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if (intel_irq_remap_ops.prepare() == 0)
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remap_ops = &intel_irq_remap_ops;
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else if (IS_ENABLED(CONFIG_AMD_IOMMU) &&
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amd_iommu_irq_ops.prepare() == 0)
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remap_ops = &amd_iommu_irq_ops;
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else
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return -ENOSYS;
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return 0;
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}
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int __init irq_remapping_enable(void)
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{
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int ret;
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if (!remap_ops->enable)
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return -ENODEV;
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ret = remap_ops->enable();
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if (irq_remapping_enabled)
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irq_remapping_modify_x86_ops();
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return ret;
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}
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void irq_remapping_disable(void)
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{
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if (irq_remapping_enabled && remap_ops->disable)
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remap_ops->disable();
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}
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int irq_remapping_reenable(int mode)
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{
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if (irq_remapping_enabled && remap_ops->reenable)
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return remap_ops->reenable(mode);
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return 0;
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}
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int __init irq_remap_enable_fault_handling(void)
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{
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if (!irq_remapping_enabled)
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return 0;
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if (!remap_ops->enable_faulting)
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return -ENODEV;
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return remap_ops->enable_faulting();
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}
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void panic_if_irq_remap(const char *msg)
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{
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if (irq_remapping_enabled)
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panic(msg);
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}
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void ir_ack_apic_edge(struct irq_data *data)
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{
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ack_APIC_irq();
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}
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/**
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* irq_remapping_get_ir_irq_domain - Get the irqdomain associated with the IOMMU
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* device serving request @info
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* @info: interrupt allocation information, used to identify the IOMMU device
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*
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* It's used to get parent irqdomain for HPET and IOAPIC irqdomains.
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* Returns pointer to IRQ domain, or NULL on failure.
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*/
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struct irq_domain *
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irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
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{
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if (!remap_ops || !remap_ops->get_ir_irq_domain)
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return NULL;
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return remap_ops->get_ir_irq_domain(info);
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}
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/**
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* irq_remapping_get_irq_domain - Get the irqdomain serving the request @info
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* @info: interrupt allocation information, used to identify the IOMMU device
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*
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* There will be one PCI MSI/MSIX irqdomain associated with each interrupt
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* remapping device, so this interface is used to retrieve the PCI MSI/MSIX
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* irqdomain serving request @info.
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* Returns pointer to IRQ domain, or NULL on failure.
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*/
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struct irq_domain *
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irq_remapping_get_irq_domain(struct irq_alloc_info *info)
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{
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if (!remap_ops || !remap_ops->get_irq_domain)
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return NULL;
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return remap_ops->get_irq_domain(info);
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}
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