1/ Thanks! 2/ Is it available now or is it still a project? Thanks, Ben -----Original Message----- From: Chris Wilson [mailto:chris@xxxxxxxxxxxxxxxxxx] Sent: Saturday, May 28, 2011 1:54 AM To: Segovia, Benjamin; dri-devel@xxxxxxxxxxxxxxxxxxxxx Subject: Re: Questions about libdrm_intel and way to share physical memory between CPU and GPU On Fri, 27 May 2011 14:37:45 -0700, "Segovia, Benjamin" <benjamin.segovia@xxxxxxxxx> wrote: > Hello gurus, > > I have two question mostly regarding libdrm_intel > > 1/ What is the difference between drm_intel_bo_map and drm_intel_gem_bo_map_gtt ? bo_map uses the CPU domain, and so is CPU linear (needs sw detiling). bo_gtt_map uses the uncached [WC] GTT domain, and so is GPU linear (detiling is performed by the hardware using a fence). > 2/ Will it be possible (or is it already possible) to directly share a regularly allocated piece of physical memory? Typical use case is the following one using OpenCL API: Yes. I've proposed a vmap interface to bind user-pages into the GTT, similar to a completely unused bit of TTM functionality. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
