drm/nouveau/bus: remove cpu_coherent flag
authorAlexandre Courbot <gnurou@gmail.com>
Wed, 13 Jul 2016 06:29:36 +0000 (15:29 +0900)
committerBen Skeggs <bskeggs@redhat.com>
Thu, 14 Jul 2016 01:55:18 +0000 (11:55 +1000)
commitaff51175cdbf345740ec9203eff88e772af88059
tree697209142ca1e3a150f6064c59826c77d67af701
parent36a471baa851359b3ca5a96e752c7c1a6266aef0
drm/nouveau/bus: remove cpu_coherent flag

This flag's only remaining function is to ignore the uncached flag for
BOs on coherent architectures.

However the reason for allocating an object uncache on a non-coherent
architecture (namely because the cost of doing explicit flushes/
invalidations is higher than the benefit of caching the data because
accesses are few and far between) should also apply on architectures for
which coherency is maintained implicitly. Thus allocate coherent objects
as uncached on all architectures.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
drivers/gpu/drm/nouveau/include/nvkm/core/device.h
drivers/gpu/drm/nouveau/nouveau_bo.c
drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c
drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c