tree 79a781ea1317fa560929290e4fd1c709acfae733
parent 43598875b35fdd3f699954078b7df24b5647a27a
author Ben Skeggs <bskeggs@redhat.com> 1353555835 +1000
committer Ben Skeggs <bskeggs@redhat.com> 1354147085 +1000

drm/nve0: allow specification of channel engine type in abi16 call

Previously, if either vram/gart handles were specified as ~0, the ioctl
call would fail.  In order to hack engine selection into the ioctl for
kepler, we now define (fb_ctxdma_handle == ~0) to mean "engine mask is
in tt_ctxdma_handle".

This approach also allows new userspace to detect lack of support for
non-PGRAPH channels on older kernels.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>