drm/panfrost: Make sure the shrinker does not reclaim referenced BOs
commit7e0cf7e9936c4358b0863357b90aa12afe6489da
authorBoris Brezillon <boris.brezillon@collabora.com>
Fri, 29 Nov 2019 13:59:08 +0000 (29 14:59 +0100)
committerRob Herring <robh@kernel.org>
Mon, 3 Feb 2020 11:23:21 +0000 (3 11:23 +0000)
treedcc48a883e1e10ddef9ba7f8791d2894a66d7bf9
parent8ccb5bf7619c6523e7a4384a84b72e7be804298c
drm/panfrost: Make sure the shrinker does not reclaim referenced BOs

Userspace might tag a BO purgeable while it's still referenced by GPU
jobs. We need to make sure the shrinker does not purge such BOs until
all jobs referencing it are finished.

Fixes: 013b65101315 ("drm/panfrost: Add madvise and shrinker support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191129135908.2439529-9-boris.brezillon@collabora.com
drivers/gpu/drm/panfrost/panfrost_drv.c
drivers/gpu/drm/panfrost/panfrost_gem.h
drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c
drivers/gpu/drm/panfrost/panfrost_job.c