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iommu/amd: Add initialization routines for AMD interrupt remapping

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Add the six routines required to setup interrupt remapping
with the AMD IOMMU. Also put it all together into the AMD
specific irq_remap_ops.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2012-06-26 16:46:04 +02:00
parent d976195c93
commit 6b474b8224
4 changed files with 67 additions and 0 deletions
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16
drivers/iommu/amd_iommu.c
View File

@ -45,6 +45,7 @@
#include "amd_iommu_proto.h"
#include "amd_iommu_types.h"
#include "irq_remapping.h"
#define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28))
@ -4226,4 +4227,19 @@ static int setup_hpet_msi(unsigned int irq, unsigned int id)
return 0;
}
struct irq_remap_ops amd_iommu_irq_ops = {
.supported = amd_iommu_supported,
.prepare = amd_iommu_prepare,
.enable = amd_iommu_enable,
.disable = amd_iommu_disable,
.reenable = amd_iommu_reenable,
.enable_faulting = amd_iommu_enable_faulting,
.setup_ioapic_entry = setup_ioapic_entry,
.set_affinity = set_affinity,
.free_irq = free_irq,
.compose_msi_msg = compose_msi_msg,
.msi_alloc_irq = msi_alloc_irq,
.msi_setup_irq = msi_setup_irq,
.setup_hpet_msi = setup_hpet_msi,
};
#endif

42
drivers/iommu/amd_iommu_init.c
View File

@ -34,6 +34,7 @@
#include <asm/x86_init.h>
#include <asm/iommu_table.h>
#include <asm/io_apic.h>
#include <asm/irq_remapping.h>
#include "amd_iommu_proto.h"
#include "amd_iommu_types.h"
@ -1897,7 +1898,48 @@ static int __init iommu_go_to_state(enum iommu_init_state state)
return ret;
}
#ifdef CONFIG_IRQ_REMAP
int __init amd_iommu_prepare(void)
{
return iommu_go_to_state(IOMMU_ACPI_FINISHED);
}
int __init amd_iommu_supported(void)
{
return amd_iommu_irq_remap ? 1 : 0;
}
int __init amd_iommu_enable(void)
{
int ret;
ret = iommu_go_to_state(IOMMU_ENABLED);
if (ret)
return ret;
irq_remapping_enabled = 1;
return 0;
}
void amd_iommu_disable(void)
{
amd_iommu_suspend();
}
int amd_iommu_reenable(int mode)
{
amd_iommu_resume();
return 0;
}
int __init amd_iommu_enable_faulting(void)
{
/* We enable MSI later when PCI is initialized */
return 0;
}
#endif
/*
* This is the core init function for AMD IOMMU hardware in the system.

8
drivers/iommu/amd_iommu_proto.h
View File

@ -32,6 +32,14 @@ extern void amd_iommu_uninit_devices(void);
extern void amd_iommu_init_notifier(void);
extern void amd_iommu_init_api(void);
/* Needed for interrupt remapping */
extern int amd_iommu_supported(void);
extern int amd_iommu_prepare(void);
extern int amd_iommu_enable(void);
extern void amd_iommu_disable(void);
extern int amd_iommu_reenable(int);
extern int amd_iommu_enable_faulting(void);
/* IOMMUv2 specific functions */
struct iommu_domain;

1
drivers/iommu/irq_remapping.h
View File

@ -82,6 +82,7 @@ struct irq_remap_ops {
};
extern struct irq_remap_ops intel_irq_remap_ops;
extern struct irq_remap_ops amd_iommu_irq_ops;
#else /* CONFIG_IRQ_REMAP */