29 Sep
2018
29 Sep
'18
7 a.m.
I want to access GPU VRAM via PCIe P2P access, like DirectGMA but with mainline drivers. I can acquire a dmabuf from the GPU and pass it to my PCIe framegrabber. But I don't see a way to get the PCIe bus address of the video memory which I need for the P2P transfer. Is there already any infrastructure in place for doing this? If not, what would be the right way to implement this? Add another callback to the dmabuf struct?
Cheers Dirk