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432abf68a7
linux/drivers/iommu
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Huang Rui 432abf68a7 iommu/amd: Fix the left value check of cmd buffer 
The generic command buffer entry is 128 bits (16 bytes), so the offset
of tail and head pointer should be 16 bytes aligned and increased with
0x10 per command.

When cmd buf is full, head = (tail + 0x10) % CMD_BUFFER_SIZE.

So when left space of cmd buf should be able to store only two
command, we should be issued one COMPLETE_WAIT additionally to wait
all older commands completed. Then the left space should be increased
after IOMMU fetching from cmd buf.

So left check value should be left <= 0x20 (two commands).

Signed-off-by: Huang Rui <ray.huang@amd.com>
Fixes: ac0ea6e92b ('x86/amd-iommu: Improve handling of full command buffer')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-01-04 15:22:22 +01:00
..
amd_iommu_init.c More ACPI updates for v4.10-rc1 2016-12-22 10:19:32 -08:00
amd_iommu_proto.h Merge branch 'x86/amd-avic' into x86/amd 2016-09-05 12:43:16 +02:00
amd_iommu_types.h KVM updates for v4.9-rc1 2016-10-06 10:49:01 -07:00
amd_iommu_v2.c iommu/amd: Missing error code in amd_iommu_init_device() 2016-11-29 17:39:44 +01:00
amd_iommu.c iommu/amd: Fix the left value check of cmd buffer 2017-01-04 15:22:22 +01:00
arm-smmu-v3.c iommu/arm-smmu-v3: Add IORT configuration 2016-11-29 15:57:46 +00:00
arm-smmu.c Merge branches 'arm/mediatek', 'arm/smmu', 'x86/amd', 's390', 'core' and 'arm/exynos' into next 2016-12-06 17:32:16 +01:00
dma-iommu.c iommu/dma: Implement dma_{map,unmap}_resource() 2016-11-14 16:58:36 +01:00
dmar.c Merge branches 'acpica' and 'acpi-scan' 2016-12-22 14:34:24 +01:00
exynos-iommu.c iommu/exynos: Use device dependency links to control runtime pm 2016-11-14 17:11:59 +01:00
fsl_pamu_domain.c iommu/fsl: Convert to device_group call-back 2015-10-22 00:00:49 +02:00
fsl_pamu_domain.h iommu/fsl: Make use of domain_alloc and domain_free 2015-03-31 15:32:14 +02:00
fsl_pamu.c powerpc/fsl: Move fsl_guts.h out of arch/powerpc 2015-10-21 18:05:50 -05:00
fsl_pamu.h iommu/fsl: Various cleanups 2015-02-03 18:47:18 +01:00
intel_irq_remapping.c SVM fixes for Linux 4.5 2016-02-16 08:04:06 -08:00
intel-iommu.c iommu/vt-d: Fix pasid table size encoding 2017-01-04 15:18:57 +01:00
intel-svm.c iommu/vt-d: Fix PASID table allocation 2016-11-19 09:42:35 -08:00
io-pgtable-arm-v7s.c iommu/io-pgtable-arm: Use for_each_set_bit to simplify the code 2016-11-29 15:57:40 +00:00
io-pgtable-arm.c iommu/io-pgtable-arm: Use const and __initconst for iommu_gather_ops structures 2016-11-29 15:57:41 +00:00
io-pgtable.c iommu/io-pgtable: Fix a brace coding style issue. 2016-04-05 15:34:29 +02:00
io-pgtable.h iommu/io-pgtable: Add MTK 4GB mode in Short-descriptor 2016-04-05 15:39:37 +02:00
iommu-sysfs.c iommu: Fix compile error in iommu-sysfs.c 2014-07-07 12:01:21 +02:00
iommu-traces.c
iommu.c Merge branches 'arm/mediatek', 'arm/smmu', 'x86/amd', 's390', 'core' and 'arm/exynos' into next 2016-12-06 17:32:16 +01:00
iova.c iommu/iova: Extend cached node lookup condition 2016-11-15 12:39:52 +01:00
ipmmu-vmsa.c iommu/ipmmu-vmsa: Fix wrong error handle of ipmmu_add_device 2016-09-05 12:53:58 +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 iommu, x86: Setup Posted-Interrupts capability for Intel iommu 2015-06-12 11:33:52 +02:00
Kconfig iommu/arm-smmu: Support non-PCI devices with SMMUv3 2016-09-16 09:34:17 +01:00
Makefile Merge branches 'x86/amd', 'x86/vt-d', 'arm/exynos', 'arm/mediatek', 'arm/msm', 'arm/rockchip', 'arm/smmu' and 'core' into next 2016-07-26 16:02:37 +02:00
msm_iommu_hw-8xxx.h
msm_iommu.c iommu/msm: use generic ARMV7S short descriptor pagetable ops 2016-06-21 13:57:13 +02:00
msm_iommu.h iommu/msm: Add DT adaptation 2016-06-21 13:56:00 +02:00
mtk_iommu_v1.c Merge branches 'arm/mediatek', 'arm/smmu', 'x86/amd', 's390', 'core' and 'arm/exynos' into next 2016-12-06 17:32:16 +01:00
mtk_iommu.c Merge branches 'arm/mediatek', 'arm/smmu', 'x86/amd', 's390', 'core' and 'arm/exynos' into next 2016-12-06 17:32:16 +01:00
mtk_iommu.h iommu/mediatek: Convert DT component matching to component_match_add_release() 2016-11-10 12:25:16 +01:00
of_iommu.c iommu: Make of_iommu_set/get_ops() DT agnostic 2016-11-29 15:57:43 +00:00
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 WARN_ON for page table alignment check 2016-04-05 17:53:20 +02:00
omap-iommu.h iommu/omap: Add support for configuring dsp iommus on DRA7xx 2015-10-14 14:35:47 +02:00
omap-iopgtable.h iommu/omap: Use BIT(x) macros in omap-iopgtable.h 2015-08-03 16:04:42 +02:00
rockchip-iommu.c iommu/rockchip: Prepare to support generic DMA mapping 2016-06-27 14:50:08 +02:00
s390-iommu.c iommu/s390: Drop duplicate header pci.h 2016-11-29 17:37:58 +01:00
tegra-gart.c Merge branches 'iommu/fixes', 'x86/vt-d', 'x86/amd', 'arm/smmu', 'arm/tegra' and 'core' into next 2015-04-02 13:33:19 +02:00
tegra-smmu.c iommu/tegra-smmu: Parameterize number of TLB lines 2015-08-13 17:05:28 +02:00