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| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-05-10 10:50:42 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2011-05-10 11:07:58 +0200 |
| commit | 72fe00f01f9a3240a1073be27aeaf4fc476cc662 (patch) | |
| tree | 6030bac491411d7a70e8c1c1da90c8f5e552dc74 | |
| parent | 604c307bf47350c74bb36507b86a08726c7c2075 (diff) | |
| download | kernel_samsung_smdk4412-72fe00f01f9a3240a1073be27aeaf4fc476cc662.zip kernel_samsung_smdk4412-72fe00f01f9a3240a1073be27aeaf4fc476cc662.tar.gz kernel_samsung_smdk4412-72fe00f01f9a3240a1073be27aeaf4fc476cc662.tar.bz2 | |
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>
| -rw-r--r-- | arch/x86/include/asm/amd_iommu_proto.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 7 | ||||
| -rw-r--r-- | 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); |