On Thu, Dec 12, 2013 at 8:34 PM, Thomas Hellstrom <thellstrom@xxxxxxxxxx> wrote: > On 12/12/2013 03:36 PM, Thierry Reding wrote: >> >> This is a simple test module that can be used to allocate, export and >> delete DMA-BUF objects. It can be used to test DMA-BUF sharing in >> systems that lack a real second driver. >> >> > > Looks nice. I wonder whether this could be extended to create a "streaming" > dma-buf from a user space mapping. That could be used as a generic way to > implement streaming (user) buffer objects, rather than to add explicit > support for those in, for example, TTM. Atm there's no way to get gpus to unbind their dma-buf mappings, so their essentially pinned forever from first use on. Userptr won't really make this worse, but imo we should fix this first before expanding the use-cases too much. And getting dma-bufs to integrate better into existing memory mangers like ttm will be a lot of pain. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
