search for: arch_teardown_dma_ops

...t; > > index 8436f6ade57d..5960e9f3a9d0 100644 > > > --- a/arch/arm/include/asm/dma-mapping.h > > > +++ b/arch/arm/include/asm/dma-mapping.h > > > @@ -103,6 +103,9 @@ extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, > > > #define arch_teardown_dma_ops arch_teardown_dma_ops > > > extern void arch_teardown_dma_ops(struct device *dev); > > > +#define arm_dma_iommu_detach_device arm_dma_iommu_detach_device > > > +extern void arm_dma_iommu_detach_device(struct device *dev); > > > + > > > /* do not use...

...-mapping.h b/arch/arm/include/asm/dma-mapping.h > index 8436f6ade57d..5960e9f3a9d0 100644 > --- a/arch/arm/include/asm/dma-mapping.h > +++ b/arch/arm/include/asm/dma-mapping.h > @@ -103,6 +103,9 @@ extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, > #define arch_teardown_dma_ops arch_teardown_dma_ops > extern void arch_teardown_dma_ops(struct device *dev); > > +#define arm_dma_iommu_detach_device arm_dma_iommu_detach_device > +extern void arm_dma_iommu_detach_device(struct device *dev); > + > /* do not use this function in a driver */ > static...

...gt; index 8436f6ade57d..5960e9f3a9d0 100644 >>>> --- a/arch/arm/include/asm/dma-mapping.h >>>> +++ b/arch/arm/include/asm/dma-mapping.h >>>> @@ -103,6 +103,9 @@ extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, >>>> #define arch_teardown_dma_ops arch_teardown_dma_ops >>>> extern void arch_teardown_dma_ops(struct device *dev); >>>> +#define arm_dma_iommu_detach_device arm_dma_iommu_detach_device >>>> +extern void arm_dma_iommu_detach_device(struct device *dev); >>>> + >>>> /*...

...a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index 8436f6ade57d..d6d5bd44f962 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -103,6 +103,9 @@ extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, #define arch_teardown_dma_ops arch_teardown_dma_ops extern void arch_teardown_dma_ops(struct device *dev); +#define arch_iommu_detach_device arch_iommu_detach_device +extern void arch_iommu_detach_device(struct device *dev); + /* do not use this function in a driver */ static inline bool is_device_dma_coherent(struct devic...

...a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index 8436f6ade57d..5960e9f3a9d0 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -103,6 +103,9 @@ extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, #define arch_teardown_dma_ops arch_teardown_dma_ops extern void arch_teardown_dma_ops(struct device *dev); +#define arm_dma_iommu_detach_device arm_dma_iommu_detach_device +extern void arm_dma_iommu_detach_device(struct device *dev); + /* do not use this function in a driver */ static inline bool is_device_dma_coherent(str...

From: Thierry Reding <treding at nvidia.com> An unfortunate interaction between the 32-bit ARM DMA/IOMMU mapping code and Tegra SMMU driver changes to support IOMMU groups introduced a boot- time regression on Tegra124. This was caught very late because none of the standard configurations that are tested on Tegra enable the ARM DMA/ IOMMU mapping code since it is not needed. The reason for

...lude/asm/dma-mapping.h > > index 8436f6ade57d..5960e9f3a9d0 100644 > > --- a/arch/arm/include/asm/dma-mapping.h > > +++ b/arch/arm/include/asm/dma-mapping.h > > @@ -103,6 +103,9 @@ extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, > > #define arch_teardown_dma_ops arch_teardown_dma_ops > > extern void arch_teardown_dma_ops(struct device *dev); > > +#define arm_dma_iommu_detach_device arm_dma_iommu_detach_device > > +extern void arm_dma_iommu_detach_device(struct device *dev); > > + > > /* do not use this function in a driver...

...a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index 8436f6ade57d..d6d5bd44f962 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -103,6 +103,9 @@ extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, #define arch_teardown_dma_ops arch_teardown_dma_ops extern void arch_teardown_dma_ops(struct device *dev); +#define arch_iommu_detach_device arch_iommu_detach_device +extern void arch_iommu_detach_device(struct device *dev); + /* do not use this function in a driver */ static inline bool is_device_dma_coherent(struct devic...

...| 19 +++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index b7847eb8a7bb..30aa8fb62dc3 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -44,6 +44,12 @@ void arch_teardown_dma_ops(struct device *dev); #define arch_teardown_dma_ops arch_teardown_dma_ops #endif +#ifdef CONFIG_VIRTIO +struct virtio_device; +void platform_override_dma_ops(struct virtio_device *vdev); +#define platform_override_dma_ops platform_override_dma_ops +#endif + /* do not use this function in a driv...

From: Thierry Reding <treding at nvidia.com> Depending on the kernel configuration, early ARM architecture setup code may have attached the GPU to a DMA/IOMMU mapping that transparently uses the IOMMU to back the DMA API. Tegra requires special handling for IOMMU backed buffers (a special bit in the GPU's MMU page tables indicates the memory path to take: via the SMMU or directly to the

From: Thierry Reding <treding at nvidia.com> Depending on the kernel configuration, early ARM architecture setup code may have attached the GPU to a DMA/IOMMU mapping that transparently uses the IOMMU to back the DMA API. Tegra requires special handling for IOMMU backed buffers (a special bit in the GPU's MMU page tables indicates the memory path to take: via the SMMU or directly to the

...device); diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index f8ab1c0f589e..732191a2c64e 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -671,6 +671,8 @@ static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, static inline void arch_teardown_dma_ops(struct device *dev) { } #endif +extern void dma_iommu_detach_device(struct device *dev); + static inline unsigned int dma_get_max_seg_size(struct device *dev) { if (dev->dma_parms && dev->dma_parms->max_segment_size) -- 2.17.0

...mu_dma_ops(struct device *dev) { } - -#define arm_get_iommu_dma_map_ops arm_get_dma_map_ops - -#endif /* CONFIG_ARM_DMA_USE_IOMMU */ - static const struct dma_map_ops *arm_get_dma_map_ops(bool coherent) { return coherent ? &arm_coherent_dma_ops : &arm_dma_ops; @@ -2426,7 +2410,6 @@ void arch_teardown_dma_ops(struct device *dev) void arch_iommu_detach_device(struct device *dev) { -#ifdef CONFIG_ARM_DMA_USE_IOMMU struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev); const struct dma_map_ops *dma_ops; @@ -2438,5 +2421,4 @@ void arch_iommu_detach_device(struct device *dev) dma_ops =...

This patch series is the follow up on the discussions we had before about the RFC titled [RFC,V2] virtio: Add platform specific DMA API translation for virito devices (https://patchwork.kernel.org/patch/10417371/). There were suggestions about doing away with two different paths of transactions with the host/QEMU, first being the direct GPA and the other being the DMA API based translations.

This patch series is the follow up on the discussions we had before about the RFC titled [RFC,V2] virtio: Add platform specific DMA API translation for virito devices (https://patchwork.kernel.org/patch/10417371/). There were suggestions about doing away with two different paths of transactions with the host/QEMU, first being the direct GPA and the other being the DMA API based translations.