Tom Lendacky 23e967e17c iommu/amd: Reduce delay waiting for command buffer space ... Currently if there is no room to add a command to the command buffer, the driver performs a "completion wait" which only returns when all commands on the queue have been processed. There is no need to wait for the entire command queue to be executed before adding the next command. Update the driver to perform the same udelay() loop that the "completion wait" performs, but instead re-read the head pointer to determine if sufficient space is available. The very first time it is found that there is no space available, the udelay() will be skipped to immediately perform the opportunistic read of the head pointer. If it is still found that there is not sufficient space, then the udelay() will be performed. Signed-off-by: Leo Duran <leo.duran@amd.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>		2017-06-08 14:31:03 +02:00
..
amd_iommu_init.c	iommu/amd: Reduce amount of MMIO when submitting commands	2017-06-08 14:31:03 +02:00
amd_iommu_proto.h	x86/events, drivers/amd/iommu: Prepare for multiple IOMMUs support	2017-03-30 09:53:55 +02:00
amd_iommu_types.h	iommu/amd: Reduce amount of MMIO when submitting commands	2017-06-08 14:31:03 +02:00
amd_iommu_v2.c	iommu/amd: Fix incorrect error handling in amd_iommu_bind_pasid()	2017-04-24 12:33:34 +02:00
amd_iommu.c	iommu/amd: Reduce delay waiting for command buffer space	2017-06-08 14:31:03 +02:00
arm-smmu-v3.c	Merge branches 'arm/exynos', 'arm/omap', 'arm/rockchip', 'arm/mediatek', 'arm/smmu', 'arm/core', 'x86/vt-d', 'x86/amd' and 'core' into next	2017-05-04 18:06:17 +02:00
arm-smmu.c	Merge branches 'arm/exynos', 'arm/omap', 'arm/rockchip', 'arm/mediatek', 'arm/smmu', 'arm/core', 'x86/vt-d', 'x86/amd' and 'core' into next	2017-05-04 18:06:17 +02:00
dma-iommu.c	iommu/dma: Plumb in the per-CPU IOVA caches	2017-04-03 12:45:03 +02:00
dmar.c	iommu/dmar: Remove redundant ' != 0' when check return code	2017-03-22 15:42:17 +01:00
exynos-iommu.c	Merge branches 'arm/exynos', 'arm/omap', 'arm/rockchip', 'arm/mediatek', 'arm/smmu', 'arm/core', 'x86/vt-d', 'x86/amd' and 'core' into next	2017-05-04 18:06:17 +02:00
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: Remove pci.h include from trace/events/iommu.h	2017-04-29 00:20:49 +02:00
intel_irq_remapping.c	iommu/vt-d: Don't print the failure message when booting non-kdump kernel	2017-04-28 23:38:42 +02:00
intel-iommu.c	Merge branches 'arm/exynos', 'arm/omap', 'arm/rockchip', 'arm/mediatek', 'arm/smmu', 'arm/core', 'x86/vt-d', 'x86/amd' and 'core' into next	2017-05-04 18:06:17 +02:00
intel-svm.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h>	2017-03-02 08:42:28 +01:00
io-pgtable-arm-v7s.c	iommu/io-pgtable-arm-v7s: Check for leaf entry before dereferencing it	2017-03-10 18:23:34 +00:00
io-pgtable-arm.c	iommu/io-pgtable-arm: Avoid shift overflow in block size	2017-04-06 16:06:44 +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	iommu/io-pgtable: Add MTK 4GB mode in Short-descriptor	2016-04-05 15:39:37 +02:00
iommu-sysfs.c	iommu: Make iommu_device_link/unlink take a struct iommu_device	2017-02-10 13:44:57 +01:00
iommu-traces.c	iommu: Add iommu_error class event to iommu trace	2013-09-25 11:07:04 +02:00
iommu.c	Merge branches 'arm/exynos', 'arm/omap', 'arm/rockchip', 'arm/mediatek', 'arm/smmu', 'arm/core', 'x86/vt-d', 'x86/amd' and 'core' into next	2017-05-04 18:06:17 +02:00
iova.c	Merge branches 'arm/exynos', 'arm/omap', 'arm/rockchip', 'arm/mediatek', 'arm/smmu', 'arm/core', 'x86/vt-d', 'x86/amd' and 'core' into next	2017-05-04 18:06:17 +02:00
ipmmu-vmsa.c	iommu/ipmmu-vmsa: Restrict IOMMU Domain Geometry to 32-bit address space	2017-02-06 13:09:43 +01:00
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	vfio: ccw: basic implementation for vfio_ccw driver	2017-03-31 12:55:04 +02:00
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	iommu/msm: Move mach includes to iommu directory	2013-08-06 11:18:03 -07:00
msm_iommu.c	iommu: Remove iommu_register_instance interface	2017-02-10 14:54:37 +01:00
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: Teach MTK-IOMMUv1 about 'struct iommu_device'	2017-04-03 13:17:02 +02:00
mtk_iommu.c	iommu: Remove iommu_register_instance interface	2017-02-10 14:54:37 +01:00
mtk_iommu.h	iommu/mediatek: Make use of iommu_device_register interface	2017-02-10 13:44:57 +01:00
of_iommu.c	iommu: of: Handle IOMMU lookup failure with deferred probing or error	2017-04-20 16:31:07 +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: Add iommu-group support	2017-04-20 16:33:59 +02:00
omap-iommu.h	iommu/omap: Add iommu-group support	2017-04-20 16:33:59 +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	Merge branches 'arm/exynos', 'arm/omap', 'arm/rockchip', 'arm/mediatek', 'arm/smmu', 'arm/core', 'x86/vt-d', 'x86/amd' and 'core' into next	2017-05-04 18:06:17 +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: Remove pci.h include from trace/events/iommu.h	2017-04-29 00:20:49 +02:00