Prandr

If I try to set config_bar_num (as suggested by @FilipVaverka) or fix the define (per @march1993) xdma0_user doesn't show up in /dev

@march1993 Why is that? I wonder if it is possible to fix this then, because I would definitely need more than that. And also if this problem may have anything...

The answers above are not quite correct, because it is not the only and IMO not the best way to access xdmaN_user. Upstream XDMA already implements read/write functions, which can...

@dmitrym1 I am sorry to say that you seem to have a completely wrong idea how XDMA works. The CPU sets the transfer up and configures the IP Core. It...

@LNC0831 @zhaochengjie0405 I have reworked the XDMA driver and it should improve the latency, particularly in poll mode, because everything there is done in the same thread. Thus there are...

> > [@LNC0831](https://github.com/LNC0831) [@zhaochengjie0405](https://github.com/zhaochengjie0405) I have reworked the XDMA driver and it should improve the latency, particularly in poll mode, because everything there is done in the same thread. Thus...

Pinning moves transfer buffer into the main operating memory. Looks like you don't have enough free memory left. How large is the transfer you trying to perform? It looks strange...

eop_flush is pretty much pointless for C2H devices, so don't use it, especially when you try to download multiple packets in single transfer. The transfer is split into descriptors on...

You can use AXI-Stream mode, there is no problem in that. The problem is the XDMA packet mode with `O_TRUNC` flag. It doesn't work like you want/need it. That's why...

I don't fully understand the problem. If you need to simultaneously write and read data, just do inside separate threads. XDMA devices don't have mmap becuase it doesn't make sense...