171 lines
3.3 KiB
C
171 lines
3.3 KiB
C
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/msi.h>
|
|
|
|
#include <asm/hw_irq.h>
|
|
#include <asm/irq_remapping.h>
|
|
|
|
#include "irq_remapping.h"
|
|
|
|
int irq_remapping_enabled;
|
|
|
|
int disable_irq_remap;
|
|
int disable_sourceid_checking;
|
|
int no_x2apic_optout;
|
|
|
|
static struct irq_remap_ops *remap_ops;
|
|
|
|
static __init int setup_nointremap(char *str)
|
|
{
|
|
disable_irq_remap = 1;
|
|
return 0;
|
|
}
|
|
early_param("nointremap", setup_nointremap);
|
|
|
|
static __init int setup_irqremap(char *str)
|
|
{
|
|
if (!str)
|
|
return -EINVAL;
|
|
|
|
while (*str) {
|
|
if (!strncmp(str, "on", 2))
|
|
disable_irq_remap = 0;
|
|
else if (!strncmp(str, "off", 3))
|
|
disable_irq_remap = 1;
|
|
else if (!strncmp(str, "nosid", 5))
|
|
disable_sourceid_checking = 1;
|
|
else if (!strncmp(str, "no_x2apic_optout", 16))
|
|
no_x2apic_optout = 1;
|
|
|
|
str += strcspn(str, ",");
|
|
while (*str == ',')
|
|
str++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
early_param("intremap", setup_irqremap);
|
|
|
|
void __init setup_irq_remapping_ops(void)
|
|
{
|
|
remap_ops = &intel_irq_remap_ops;
|
|
}
|
|
|
|
int irq_remapping_supported(void)
|
|
{
|
|
if (disable_irq_remap)
|
|
return 0;
|
|
|
|
if (!remap_ops || !remap_ops->supported)
|
|
return 0;
|
|
|
|
return remap_ops->supported();
|
|
}
|
|
|
|
int __init irq_remapping_prepare(void)
|
|
{
|
|
if (!remap_ops || !remap_ops->prepare)
|
|
return -ENODEV;
|
|
|
|
return remap_ops->prepare();
|
|
}
|
|
|
|
int __init irq_remapping_enable(void)
|
|
{
|
|
if (!remap_ops || !remap_ops->enable)
|
|
return -ENODEV;
|
|
|
|
return remap_ops->enable();
|
|
}
|
|
|
|
void irq_remapping_disable(void)
|
|
{
|
|
if (!remap_ops || !remap_ops->disable)
|
|
return;
|
|
|
|
remap_ops->disable();
|
|
}
|
|
|
|
int irq_remapping_reenable(int mode)
|
|
{
|
|
if (!remap_ops || !remap_ops->reenable)
|
|
return 0;
|
|
|
|
return remap_ops->reenable(mode);
|
|
}
|
|
|
|
int __init irq_remap_enable_fault_handling(void)
|
|
{
|
|
if (!remap_ops || !remap_ops->enable_faulting)
|
|
return -ENODEV;
|
|
|
|
return remap_ops->enable_faulting();
|
|
}
|
|
|
|
int setup_ioapic_remapped_entry(int irq,
|
|
struct IO_APIC_route_entry *entry,
|
|
unsigned int destination, int vector,
|
|
struct io_apic_irq_attr *attr)
|
|
{
|
|
if (!remap_ops || !remap_ops->setup_ioapic_entry)
|
|
return -ENODEV;
|
|
|
|
return remap_ops->setup_ioapic_entry(irq, entry, destination,
|
|
vector, attr);
|
|
}
|
|
|
|
int set_remapped_irq_affinity(struct irq_data *data, const struct cpumask *mask,
|
|
bool force)
|
|
{
|
|
if (!config_enabled(CONFIG_SMP) || !remap_ops ||
|
|
!remap_ops->set_affinity)
|
|
return 0;
|
|
|
|
return remap_ops->set_affinity(data, mask, force);
|
|
}
|
|
|
|
void free_remapped_irq(int irq)
|
|
{
|
|
if (!remap_ops || !remap_ops->free_irq)
|
|
return;
|
|
|
|
remap_ops->free_irq(irq);
|
|
}
|
|
|
|
void compose_remapped_msi_msg(struct pci_dev *pdev,
|
|
unsigned int irq, unsigned int dest,
|
|
struct msi_msg *msg, u8 hpet_id)
|
|
{
|
|
if (!remap_ops || !remap_ops->compose_msi_msg)
|
|
return;
|
|
|
|
remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id);
|
|
}
|
|
|
|
int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
|
|
{
|
|
if (!remap_ops || !remap_ops->msi_alloc_irq)
|
|
return -ENODEV;
|
|
|
|
return remap_ops->msi_alloc_irq(pdev, irq, nvec);
|
|
}
|
|
|
|
int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
|
|
int index, int sub_handle)
|
|
{
|
|
if (!remap_ops || !remap_ops->msi_setup_irq)
|
|
return -ENODEV;
|
|
|
|
return remap_ops->msi_setup_irq(pdev, irq, index, sub_handle);
|
|
}
|
|
|
|
int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
|
|
{
|
|
if (!remap_ops || !remap_ops->setup_hpet_msi)
|
|
return -ENODEV;
|
|
|
|
return remap_ops->setup_hpet_msi(irq, id);
|
|
}
|