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Questions - iommu

PCIe DMA aarch64 0x10 Translation Fault

I'm trying to write a PCIe driver to DMA pages from the host memory to an FPGA. My host setup is Cavium ThunderX2 and my FPGAs are Xilinx Alveo U50. A DMA from/to the host causes the ARM SMMU v3.4 to ...
test-img

Naarayanan_Rao

linux-device-driver

arm64

dma

pci-e

iommu

Votes: 0

Answers: 1

Latest Answer

I was able to fix the issue. There was a synchronization lapse between the IOMMU and the DMA mapping. There were no valid descriptors found for the mapped DMA addresses in the SMMU. I used dma_alloc_c...
test-img

Naarayanan_Rao

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