# AGX Orin上使用MSI中断与DMA映射

**URL:** <https://forums.developer.nvidia.com/t/agx-orin-msi-dma/366744>\
**Category:** Jetson AGX Orin\
**Tags:** pcie, fpga, chinese\
**Created:** [April 16, 2026, 12:47am UTC](https://forums.developer.nvidia.com/t/agx-orin-msi-dma/366744 "2026-04-16T00:47:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![1842111801](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1842111801](https://forums.developer.nvidia.com/u/1842111801)\
**Post date:** [April 16, 2026, 12:47am UTC](https://forums.developer.nvidia.com/t/agx-orin-msi-dma/366744/1 "2026-04-16T00:47:06Z")

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AGX Orin上使用MSI中断与DMA映射，通过PCIE连接到FPGA上，连接是正确的，pci结构体里面可以正确匹配到FPGA，然后bar空间可以读写，但是fpga发送MSI中断，orin上接收不到，然后FPGA防问orin通过dma\_alloc\_coherent映射的内存，内核报错arm-smmu 12000000.iommu: Unhandled context fault: fsr=0x80000402, iova=0x0000c080, fsynr=0x80010, cbfrsynra=0x1014, cb=6  
[8790.389937] mc-err: vpr base=e:49800000, size=368, ctrl=1, override:(201803c6, b9ee11c1, 1, 0)  
[8790.390216] mc-err: (255) csw\_pcie5w: MC request violates VPR requirements  
[8790.390419] mc-err: status = 0x0ff740e3; hi\_addr\_reg = 0x00000000 addr = 0xffffffff00  
[8790.390645] mc-err: secure: yes, access-type: write  
[8790.390791] mc-err: MC fault - no status: ECC scrub complete，jetpake版本5.12，ubuntu20.04，内核5.10.这个原因是什么呀

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**Author:** ![kayccc](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/kayccc/32/14043_2.png) [@kayccc](https://forums.developer.nvidia.com/u/kayccc)\
**Post date:** [April 16, 2026, 1:11am UTC](https://forums.developer.nvidia.com/t/agx-orin-msi-dma/366744/3 "2026-04-16T01:11:18Z")

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The JetPack5.1.2/R35.4.1 was released at almost 3 years ago, it’s a bit too old to debug.  
Please move to the latest version, such as JetPack 5.1.6 or JetPack 6.2.2 to to see if issue still present.

Thanks

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**Author:** ![1842111801](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1842111801](https://forums.developer.nvidia.com/u/1842111801)\
**Post date:** [April 16, 2026, 7:04am UTC](https://forums.developer.nvidia.com/t/agx-orin-msi-dma/366744/4 "2026-04-16T07:04:43Z")

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Jetpack 5.1.6，安装后，还是会有这个问题，