diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-12-19 12:43:45 +0000 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2016-12-20 16:30:47 +0200 |
| commit | abb0deacb5a6713b918ac6395182cb27bb88be69 (patch) | |
| tree | e6f1bb3c431498b97689930c89df9e513b93fef7 /Documentation | |
| parent | d8953c8326d87a337763ca547ad7db034a94ddb1 (diff) | |
drm/i915: Fallback to single PAGE_SIZE segments for DMA remapping
If we at first do not succeed with attempting to remap our physical
pages using a coalesced scattergather list, try again with one
scattergather entry per page. This should help with swiotlb as it uses a
limited buffer size and only searches for contiguous chunks within its
buffer aligned up to the next boundary - i.e. we may prematurely cause a
failure as we are unable to utilize the unused space between large
chunks and trigger an error such as:
i915 0000:00:02.0: swiotlb buffer is full (sz: 1630208 bytes)
Reported-by: Juergen Gross <jgross@suse.com>
Tested-by: Juergen Gross <jgross@suse.com>
Fixes: 871dfbd67d4e ("drm/i915: Allow compaction upto SWIOTLB max segment size")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: <drm-intel-fixes@lists.freedesktop.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20161219124346.550-1-chris@chris-wilson.co.uk
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit d766ef53006c2c38a7fe2bef0904105a793383f2)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions