Forum Discussion

UserID4331231's avatar
UserID4331231
Icon for Occasional Contributor rankOccasional Contributor
3 months ago
Solved

Debugging failed DMA

Hello Everyone I am using Agilex7 FPGA. I am using Multi Channel DMA FPGA IP for PCI Express - Data movers only Example design and have modified example design to fit into my needs. BAR0 is 16KB -...
  • UserID4331231's avatar
    UserID4331231
    3 months ago

    I resolved this issue by writing my custom driver function from example driver provided by altera. The bottom line was offset 9600_0000h is mapped to PCIe device bar space and my original assumption was since its a physical address , this offset can work. But it was failing.

    So I reviewed and used the same driver function as in example code base to allocate huge pages. Ot top I added my enhancements to initialize values I wanted and now this DMA is passing; from application side I can also see content of huge page getting updated.

UserID4331231's avatar
UserID4331231
Icon for Occasional Contributor rankOccasional Contributor
3 months ago

I resolved this issue by writing my custom driver function from example driver provided by altera. The bottom line was offset 9600_0000h is mapped to PCIe device bar space and my original assumption was since its a physical address , this offset can work. But it was failing.

So I reviewed and used the same driver function as in example code base to allocate huge pages. Ot top I added my enhancements to initialize values I wanted and now this DMA is passing; from application side I can also see content of huge page getting updated.