Displaying 2 results from an estimated 2 matches for "1957938d8c9c".
2018 Apr 25
0
[PATCH 3/4] ARM: dma-mapping: Implement arch_iommu_detach_device()
...6 +242,10 @@ void arch_teardown_dma_ops(struct device *dev)
{
}
+void arch_iommu_detach_device(struct device *dev)
+{
+}
+
#define PREALLOC_DMA_DEBUG_ENTRIES 4096
static int __init dma_debug_do_init(void)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 8c398fedbbb6..1957938d8c9c 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -2366,6 +2366,21 @@ static void arm_teardown_iommu_dma_ops(struct device *dev)
arm_iommu_release_mapping(mapping);
}
+void arch_iommu_detach_device(struct device *dev)
+{
+ struct dma_iommu_mapping *mapping = to_dma_iomm...
2018 Apr 25
5
[PATCH 1/4] drm/nouveau: tegra: Detach from ARM DMA/IOMMU mapping
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