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Acksam88
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Registered: ‎03-24-2021

Linux DMA from user space 2.0 issue on RECEIVE ONLY SETUP

Good Day All, Was trying to recreate the RECEIVE ONLY DMA Design from https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/1027702787/Linux+DMA+From+User+Space+2.0

https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/1027702787/Linux+DMA+From+User+Space+2.0#Receive-Only

cliams that "Read and Write channels in the DMA are both enabled to minimize the changes to the system which allows the kernel driver to still operate without any changes." I have use back the same kernel driver (dma-proxy.c) and application (dma-proxy-test.c) to test out the design. However the RX Channels was not able to receive any data incoming from the binary counter, eventually ended with (DMA TIMED OUT). Am i missing out some settings with relation to this RECEIVE ONLY DMA design? Thanks in advance.

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