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x86/amd-iommu: Use threaded interupt handler 

Move the interupt handling for the iommu into the interupt
thread to reduce latencies and prepare interupt handling for
pri handling.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2011-05-10 10:50:42 +02:00
parent 604c307bf4
commit 72fe00f01f
3 changed files with 12 additions and 5 deletions
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1
arch/x86/include/asm/amd_iommu_proto.h
View File

@ -23,6 +23,7 @@
extern int amd_iommu_init_dma_ops(void);
extern int amd_iommu_init_passthrough(void);
extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
extern void amd_iommu_apply_erratum_63(u16 devid);
extern void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu);

7
arch/x86/kernel/amd_iommu.c
View File

@ -366,7 +366,7 @@ static void iommu_poll_events(struct amd_iommu *iommu)
spin_unlock_irqrestore(&iommu->lock, flags);
}
irqreturn_t amd_iommu_int_handler(int irq, void *data)
irqreturn_t amd_iommu_int_thread(int irq, void *data)
{
struct amd_iommu *iommu;
@ -376,6 +376,11 @@ irqreturn_t amd_iommu_int_handler(int irq, void *data)
return IRQ_HANDLED;
}
irqreturn_t amd_iommu_int_handler(int irq, void *data)
{
return IRQ_WAKE_THREAD;
}
/****************************************************************************
*
* IOMMU command queuing functions

9
arch/x86/kernel/amd_iommu_init.c
View File

@ -1034,10 +1034,11 @@ static int iommu_setup_msi(struct amd_iommu *iommu)
if (pci_enable_msi(iommu->dev))
return 1;
r = request_irq(iommu->dev->irq, amd_iommu_int_handler,
IRQF_SAMPLE_RANDOM,
"AMD-Vi",
NULL);
r = request_threaded_irq(iommu->dev->irq,
amd_iommu_int_handler,
amd_iommu_int_thread,
0, "AMD-Vi",
iommu->dev);
if (r) {
pci_disable_msi(iommu->dev);