Hi Suman, I have modified the omap iommu code to support the PCIe MMU (system MMU2). See the last three commits in the branch iommu-omap-pcie of my git repository: https://git.ti.com/~rgoebel/processor-sdk/visioncam-linux/commits/iommu-omap -pcie I tested this using PCIe_SS1 as root complex on a AM5726 SoC. A FPGA device is connected doing DMA writes into host memory. To enable the MMU for PCIe, proper configuration of the devicetree is required: - Set the dma-ranges properties correctly - Define the mmu node for the PCIe MMU - Set the iommu-map property within the pcie node Please note that I'm using the ti,syscon-mmuconfig property for setting the control register to enable the MMU. This property is already used for the DSP MMU, but the arguments are handled differently. The last commit describes those arguments and also has an example. I could prepare a patch if there is any interest, please let me know. Regards, Ralf
