Commit-ID: 72fe00f01f9a3240a1073be27aeaf4fc476cc662
Gitweb: http://git.kernel.org/tip/72fe00f01f9a3240a1073be27aeaf4fc476cc662
Author: Joerg Roedel <joerg.roedel@xxxxxxx>
AuthorDate: Tue, 10 May 2011 10:50:42 +0200
Committer: Joerg Roedel <joerg.roedel@xxxxxxx>
CommitDate: Tue, 10 May 2011 11:07:58 +0200
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@xxxxxxx>
---
arch/x86/include/asm/amd_iommu_proto.h | 1 +
arch/x86/kernel/amd_iommu.c | 7 ++++++-
arch/x86/kernel/amd_iommu_init.c | 9 +++++----
3 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/arch/x86/include/asm/amd_iommu_proto.h b/arch/x86/include/asm/amd_iommu_proto.h
index a4ae6c3..55d95eb 100644
--- a/arch/x86/include/asm/amd_iommu_proto.h
+++ b/arch/x86/include/asm/amd_iommu_proto.h
@@ -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);
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index dc5ddda..873e7e1 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -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
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 28b0781..9179c21 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -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);
--
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