linux

mirror of https://github.com/raspberrypi/linux.git synced 2026-01-05 10:47:34 +00:00

Files

Thierry Reding 6b2daed867 gpu: host1x: Acquire a reference to the IOVA cache

[ Upstream commit f40e1590c5 ]

The IOVA API uses a memory cache to allocate IOVA nodes from. To make
sure that this cache is available, obtain a reference to it and release
the reference when the cache is no longer needed.

On 64-bit ARM this is hidden by the fact that the DMA mapping API gets
that reference and never releases it. On 32-bit ARM, this is papered
over by the Tegra DRM driver (the sole user of the host1x API requiring
the cache) acquiring a reference to the IOVA cache for its own purposes.
However, there may be additional users of this API in the future, so fix
this upfront to avoid surprises.

Fixes: 404bfb78da ("gpu: host1x: Add IOMMU support")
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-08-03 07:47:49 +02:00

gpu: host1x: Disassemble more instructions

2017-10-20 14:19:52 +02:00

bus.c

gpu: host1x: Cleanup on initialization failure

2017-12-13 13:42:03 +01:00

bus.h

gpu: host1x: Provide a proper struct bus_type

2015-01-27 10:09:14 +01:00

cdma.c

gpu: host1x: Add IOMMU support

2017-04-05 18:11:43 +02:00