From eaa1e8e127205a9517bfc89275cd8723e8b09ed2 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 6 Jan 2015 10:06:41 +0000 Subject: [PATCH] ioct_wrappers: Add some mmap(wc) blurb dropped between authors Signed-off-by: Chris Wilson --- lib/ioctl_wrappers.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/ioctl_wrappers.c b/lib/ioctl_wrappers.c index f20786ac..dd48d0e6 100644 --- a/lib/ioctl_wrappers.c +++ b/lib/ioctl_wrappers.c @@ -523,7 +523,9 @@ bool gem_mmap__has_wc(int fd) * @prot: memory protection bits as used by mmap() * * This functions wraps up procedure to establish a memory mapping through - * direct cpu access, bypassing the gpu and cpu caches completely. + * direct cpu access, bypassing the gpu and cpu caches completely and also + * bypassing the GTT system agent (i.e. there is no automatic tiling of + * the mmapping through the fence registers). * * Returns: A pointer to the created memory mapping. */