176 lines
3.5 KiB
C
176 lines
3.5 KiB
C
#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/cpumask.h>
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#include <linux/errno.h>
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#include <linux/msi.h>
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#include <asm/hw_irq.h>
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#include <asm/irq_remapping.h>
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#include "irq_remapping.h"
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int irq_remapping_enabled;
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int disable_irq_remap;
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int disable_sourceid_checking;
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int no_x2apic_optout;
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static struct irq_remap_ops *remap_ops;
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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 __init setup_irq_remapping_ops(void)
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{
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remap_ops = &intel_irq_remap_ops;
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#ifdef CONFIG_AMD_IOMMU
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if (amd_iommu_irq_ops.prepare() == 0)
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remap_ops = &amd_iommu_irq_ops;
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#endif
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}
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int irq_remapping_supported(void)
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{
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if (disable_irq_remap)
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return 0;
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if (!remap_ops || !remap_ops->supported)
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return 0;
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return remap_ops->supported();
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}
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int __init irq_remapping_prepare(void)
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{
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if (!remap_ops || !remap_ops->prepare)
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return -ENODEV;
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return remap_ops->prepare();
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}
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int __init irq_remapping_enable(void)
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{
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if (!remap_ops || !remap_ops->enable)
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return -ENODEV;
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return remap_ops->enable();
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}
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void irq_remapping_disable(void)
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{
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if (!remap_ops || !remap_ops->disable)
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return;
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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 (!remap_ops || !remap_ops->reenable)
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return 0;
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return remap_ops->reenable(mode);
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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 (!remap_ops || !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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int setup_ioapic_remapped_entry(int irq,
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struct IO_APIC_route_entry *entry,
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unsigned int destination, int vector,
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struct io_apic_irq_attr *attr)
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{
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if (!remap_ops || !remap_ops->setup_ioapic_entry)
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return -ENODEV;
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return remap_ops->setup_ioapic_entry(irq, entry, destination,
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vector, attr);
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}
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int set_remapped_irq_affinity(struct irq_data *data, const struct cpumask *mask,
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bool force)
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{
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if (!config_enabled(CONFIG_SMP) || !remap_ops ||
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!remap_ops->set_affinity)
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return 0;
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return remap_ops->set_affinity(data, mask, force);
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}
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void free_remapped_irq(int irq)
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{
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if (!remap_ops || !remap_ops->free_irq)
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return;
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remap_ops->free_irq(irq);
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}
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void compose_remapped_msi_msg(struct pci_dev *pdev,
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unsigned int irq, unsigned int dest,
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struct msi_msg *msg, u8 hpet_id)
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{
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if (!remap_ops || !remap_ops->compose_msi_msg)
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return;
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remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id);
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}
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int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
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{
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if (!remap_ops || !remap_ops->msi_alloc_irq)
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return -ENODEV;
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return remap_ops->msi_alloc_irq(pdev, irq, nvec);
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}
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int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
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int index, int sub_handle)
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{
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if (!remap_ops || !remap_ops->msi_setup_irq)
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return -ENODEV;
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return remap_ops->msi_setup_irq(pdev, irq, index, sub_handle);
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}
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int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
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{
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if (!remap_ops || !remap_ops->setup_hpet_msi)
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return -ENODEV;
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return remap_ops->setup_hpet_msi(irq, id);
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}
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