| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/errno.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); |
| } |