Forum Discussion

MehmetFide's avatar
MehmetFide
Icon for New Contributor rankNew Contributor
2 years ago

How to stop Avalon DMA?

Hello, We have an NXP SoM module (with Linux) connected to an Intel Arria 10 FPGA through a PCIe bus. We use Arria 10 Avalon-MM DMA Interface to transfer data from FPGA to our Linux processor. The ...
Configuration
VenT_Altera's avatar
VenT_Altera
Icon for Frequent Contributor rankFrequent Contributor
2 years ago

Hi @MehmetFide,


These registers are specified in the write descriptor table. Each of them is dedicated to carrying the specified information correspondingly, and the user cannot stop the DMA by controlling these registers.

Thanks.

Best Regards,

VenTing_Intel


MehmetFide's avatar
MehmetFide
Icon for New Contributor rankNew Contributor
2 years ago

Hi @ventt ,

What I understand from you is that there is no practical way that the user can stop the DMA in action then. Is this correct?

Is it possible to add a RESET functionality to the DMA in the FPGA and map this pin to one of the PCIe BARs registers so that user can reset it from the driver side? Is this DMA hard IP or soft one? (our PFGA is Arria 10 GX -> 10AX016E4F27I3SG)

I'm not an FPGA engineer but the engineer in our company uses QSYS and ready IPs in Quartus provided by Intel. I wonder if it is possible for him to alter existing DMA IP and add such a reset functionality to it?

Thank you.