tree da4d31cc0d0a867786e2cca541d6a89a1541c921
parent c6a7b026a3a80662d8f7bb6b4f7821329aa7111b
author Alexandre Courbot <acourbot@nvidia.com> 1424424179 +0900
committer Ben Skeggs <bskeggs@redhat.com> 1428994842 +1000

make RAM device optional

Having a RAM device does not make sense for chips like GK20A which have
no dedicated video memory. The dummy RAM device that we used so far
works as a temporary band-aid, but in the longer term it is desirable
for the driver to be able to work without any kind of VRAM.

This patch adds a few conditionals in places where a RAM device was
assumed to be present and allows some more objects to be allocated from
the TT domain, allowing Nouveau to handle GPUs for which
pfb->ram == NULL.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>