diff options
author | Lucas Stach <l.stach@pengutronix.de> | 2016-12-12 15:15:17 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-05 12:40:24 (GMT) |
commit | b8c5e7b1241362a131a2364fd166f8c8fdd9b363 (patch) | |
tree | f388119c0a89f356aefe92ba1f7db7563c6fb38a /drivers/virtio | |
parent | 2bc8fcd633d8e7d59a242eb4d86fbebb8cf7ff61 (diff) | |
download | linux-b8c5e7b1241362a131a2364fd166f8c8fdd9b363.tar.xz |
drm/etnaviv: trick drm_mm into giving out a low IOVA
[ Upstream commit 3546fb0cdac25a79c89d87020566fab52b92867d ]
After rollover of the IOVA space, we want to get a low IOVA address,
otherwise the the games we play by remembering the last IOVA are
pointless. When we search for a free hole with DRM_MM_SEARCH_DEFAULT,
drm_mm will pop the next entry from the free holes stack, which will
likely be a high IOVA. By using DRM_MM_SEARCH_BELOW we can trick
drm_mm into reversing the search and provide us with a low IOVA.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Wladimir van der Laan <laanwj@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/virtio')
0 files changed, 0 insertions, 0 deletions