On Sat, Sep 29, 2018 at 9:27 AM Koenig, Christian <Christian.Koenig@xxxxxxx> wrote: > > This is work in progress. > > I published patches to enable DMA_buf P2P a few months ago, but now I'm waiting for the PCI subsystem to pick up core support for this. > > I can prepare you a branch based on current upstream kernel next week if you want to test this. Thread hijack, since I just read the lwn article on p2p for storage folks: https://lwn.net/Articles/767281/ Totally doesn't match what I remember of your dma-buf p2p work. Do we need to rework, or is this some kind of higher-level interface on top of the raw p2p pci stuff? Or do I misremember. Thanks, Daniel > > Regards, > Christian. > > Am 29.09.2018 09:01 schrieb Dirk Eibach <dirk.eibach@xxxxxxxxxxxxxx>: > 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 > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
