linux/drivers/iommu/irq_remapping.c
Linus Torvalds 97027da6ad IOMMU Updates for Linux v3.6-rc1
The most important part of these updates is the IOMMU groups code
 enhancement written by Alex Williamson. It abstracts the problem that a
 given hardware IOMMU can't isolate any given device from any other
 device (e.g. 32 bit PCI devices can't usually be isolated). Devices that
 can't be isolated are grouped together. This code is required for the
 upcoming VFIO framework.
 
 Another IOMMU-API change written by be is the introduction of domain
 attributes. This makes it easier to handle GART-like IOMMUs with the
 IOMMU-API because now the start-address and the size of the domain
 address space can be queried.
 
 Besides that there are a few cleanups and fixes for the NVidia Tegra
 IOMMU drivers and the reworked init-code for the AMD IOMMU. The later is
 from my patch-set to support interrupt remapping. The rest of this
 patch-set requires x86 changes which are not mergabe yet. So full
 support for interrupt remapping with AMD IOMMUs will come in a future
 merge window.
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Merge tag 'iommu-updates-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU updates from Joerg Roedel:
 "The most important part of these updates is the IOMMU groups code
  enhancement written by Alex Williamson.  It abstracts the problem that
  a given hardware IOMMU can't isolate any given device from any other
  device (e.g.  32 bit PCI devices can't usually be isolated).  Devices
  that can't be isolated are grouped together.  This code is required
  for the upcoming VFIO framework.

  Another IOMMU-API change written by me is the introduction of domain
  attributes.  This makes it easier to handle GART-like IOMMUs with the
  IOMMU-API because now the start-address and the size of the domain
  address space can be queried.

  Besides that there are a few cleanups and fixes for the NVidia Tegra
  IOMMU drivers and the reworked init-code for the AMD IOMMU.  The
  latter is from my patch-set to support interrupt remapping.  The rest
  of this patch-set requires x86 changes which are not mergabe yet.  So
  full support for interrupt remapping with AMD IOMMUs will come in a
  future merge window."

* tag 'iommu-updates-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (33 commits)
  iommu/amd: Fix hotplug with iommu=pt
  iommu/amd: Add missing spin_lock initialization
  iommu/amd: Convert iommu initialization to state machine
  iommu/amd: Introduce amd_iommu_init_dma routine
  iommu/amd: Move unmap_flush message to amd_iommu_init_dma_ops()
  iommu/amd: Split enable_iommus() routine
  iommu/amd: Introduce early_amd_iommu_init routine
  iommu/amd: Move informational prinks out of iommu_enable
  iommu/amd: Split out PCI related parts of IOMMU initialization
  iommu/amd: Use acpi_get_table instead of acpi_table_parse
  iommu/amd: Fix sparse warnings
  iommu/tegra: Don't call alloc_pdir with as->lock
  iommu/tegra: smmu: Fix unsleepable memory allocation at alloc_pdir()
  iommu/tegra: smmu: Remove unnecessary sanity check at alloc_pdir()
  iommu/exynos: Implement DOMAIN_ATTR_GEOMETRY attribute
  iommu/tegra: Implement DOMAIN_ATTR_GEOMETRY attribute
  iommu/msm: Implement DOMAIN_ATTR_GEOMETRY attribute
  iommu/omap: Implement DOMAIN_ATTR_GEOMETRY attribute
  iommu/vt-d: Implement DOMAIN_ATTR_GEOMETRY attribute
  iommu/amd: Implement DOMAIN_ATTR_GEOMETRY attribute
  ...
2012-07-24 16:24:11 -07:00

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);
}