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ioct_wrappers: Add some mmap(wc) blurb dropped between authors

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Chris Wilson 2015-01-06 10:06:41 +00:00
parent 33d52a8543
commit eaa1e8e127
1 changed files with 3 additions and 1 deletions
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lib/ioctl_wrappers.c
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@ -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.
*/