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37de98f8f1
linux/drivers/iommu
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Robin Murphy 37de98f8f1 iommu/arm-smmu-v3: Use CMD_SYNC completion MSI 
As an IRQ, the CMD_SYNC interrupt is not particularly useful, not least
because we often need to wait for sync completion within someone else's
IRQ handler anyway. However, when the SMMU is both coherent and supports
MSIs, we can have a lot more fun by not using it as an interrupt at all.
Following the example suggested in the architecture and using a write
targeting normal memory, we can let callers wait on a status variable
outside the lock instead of having to stall the entire queue or even
touch MMIO registers. Since multiple sync commands are guaranteed to
complete in order, a simple incrementing sequence count is all we need
to unambiguously support any realistic number of overlapping waiters.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-10-20 16:55:08 +01:00
..
amd_iommu_init.c IOMMU Updates for Linux v4.14 2017-09-09 15:03:24 -07:00
amd_iommu_proto.h IOMMU Updates for Linux v4.14 2017-09-09 15:03:24 -07:00
amd_iommu_types.h IOMMU Updates for Linux v4.14 2017-09-09 15:03:24 -07:00
amd_iommu_v2.c IOMMU Updates for Linux v4.14 2017-09-09 15:03:24 -07:00
amd_iommu.c IOMMU Updates for Linux v4.14 2017-09-09 15:03:24 -07:00
arm-smmu-regs.h iommu/arm-smmu: Split out register defines 2017-08-15 17:34:48 +02:00
arm-smmu-v3.c iommu/arm-smmu-v3: Use CMD_SYNC completion MSI 2017-10-20 16:55:08 +01:00
arm-smmu.c iommu/arm-smmu: Enable bypass transaction caching for ARM SMMU 500 2017-10-20 16:54:54 +01:00
dma-iommu.c IOMMU Updates for Linux v4.13 2017-07-12 10:00:04 -07:00
dmar.c iommu/vt-d: Allow to flush more than 4GB of device TLBs 2017-08-15 18:23:53 +02:00
exynos-iommu.c iommu/exynos: Constify iommu_ops 2017-08-30 15:13:54 +02:00
fsl_pamu_domain.c Merge branches 'arm/exynos', 'arm/renesas', 'arm/rockchip', 'arm/omap', 'arm/mediatek', 'arm/tegra', 'arm/qcom', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd', 's390' and 'core' into next 2017-09-01 11:31:42 +02:00
fsl_pamu_domain.h iommu/pamu: Fix PAMU boot crash 2017-08-23 16:28:09 +02:00
fsl_pamu.c Merge branches 'arm/exynos', 'arm/renesas', 'arm/rockchip', 'arm/omap', 'arm/mediatek', 'arm/tegra', 'arm/qcom', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd', 's390' and 'core' into next 2017-09-01 11:31:42 +02:00
fsl_pamu.h iommu/pamu: Fix PAMU boot crash 2017-08-23 16:28:09 +02:00
intel_irq_remapping.c IOMMU Updates for Linux v4.13 2017-07-12 10:00:04 -07:00
intel-iommu.c IOMMU Updates for Linux v4.14 2017-09-09 15:03:24 -07:00
intel-svm.c IOMMU Updates for Linux v4.14 2017-09-09 15:03:24 -07:00
io-pgtable-arm-v7s.c iommu/io-pgtable: Sanitise map/unmap addresses 2017-07-20 10:30:28 +01:00
io-pgtable-arm.c iommu/io-pgtable: Sanitise map/unmap addresses 2017-07-20 10:30:28 +01:00
io-pgtable.c iommu/io-pgtable: Fix a brace coding style issue. 2016-04-05 15:34:29 +02:00
io-pgtable.h Revert "iommu/io-pgtable: Avoid redundant TLB syncs" 2017-07-20 10:30:27 +01:00
iommu-sysfs.c iommu: Fix wrong freeing of iommu_device->dev 2017-08-15 13:58:48 +02:00
iommu-traces.c
iommu.c Merge branches 'arm/exynos', 'arm/renesas', 'arm/rockchip', 'arm/omap', 'arm/mediatek', 'arm/tegra', 'arm/qcom', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd', 's390' and 'core' into next 2017-09-01 11:31:42 +02:00
iova.c iommu/iova: Add flush timer 2017-08-15 18:23:52 +02:00
ipmmu-vmsa.c iommu/ipmmu-vmsa: Make ipmmu_gather_ops const 2017-08-30 15:10:53 +02:00
irq_remapping.c x86/cpufeature: Replace cpu_has_apic with boot_cpu_has() usage 2016-04-13 11:37:41 +02:00
irq_remapping.h
Kconfig Merge branches 'arm/exynos', 'arm/renesas', 'arm/rockchip', 'arm/omap', 'arm/mediatek', 'arm/tegra', 'arm/qcom', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd', 's390' and 'core' into next 2017-09-01 11:31:42 +02:00
Makefile iommu/qcom: Add qcom_iommu 2017-08-15 17:34:49 +02:00
msm_iommu_hw-8xxx.h
msm_iommu.c iommu/msm: Add iommu_group support 2017-08-10 00:03:50 +02:00
msm_iommu.h iommu/msm: Make use of iommu_device_register interface 2017-02-10 13:44:57 +01:00
mtk_iommu_v1.c iommu/mediatek: Include linux/dma-mapping.h 2017-05-17 14:51:54 +02:00
mtk_iommu.c iommu/mediatek: Fix a build warning of BIT(32) in ARM 2017-08-28 11:26:21 +02:00
mtk_iommu.h iommu/mediatek: Merge 2 M4U HWs into one iommu domain 2017-08-22 16:37:59 +02:00
of_iommu.c iommu/of: Fix of_iommu_configure() for disabled IOMMUs 2017-08-15 18:23:50 +02:00
omap-iommu-debug.c iommu/omap: Align code with open parenthesis 2016-04-05 17:53:20 +02:00
omap-iommu.c iommu/omap: Use DMA-API for performing cache flushes 2017-08-04 11:59:29 +02:00
omap-iommu.h iommu/omap: Use DMA-API for performing cache flushes 2017-08-04 11:59:29 +02:00
omap-iopgtable.h iommu/omap: Use BIT(x) macros in omap-iopgtable.h 2015-08-03 16:04:42 +02:00
qcom_iommu.c iommu: qcom: annotate PM functions as __maybe_unused 2017-08-28 11:24:52 +02:00
rockchip-iommu.c Merge branches 'arm/exynos', 'arm/renesas', 'arm/rockchip', 'arm/omap', 'arm/mediatek', 'arm/tegra', 'arm/qcom', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd', 's390' and 'core' into next 2017-09-01 11:31:42 +02:00
s390-iommu.c iommu/s390: Constify iommu_ops 2017-08-30 17:53:29 +02:00
tegra-gart.c iommu/tegra-gart: Add support for struct iommu_device 2017-08-17 16:31:34 +02:00
tegra-smmu.c arm/tegra: Call bus_set_iommu() after iommu_device_register() 2017-08-30 17:28:32 +02:00