drm/nouveau/mmu/gk104,gk20a: implement new vmm backend

Browse source

Adds support for:
- 64KiB big page size.
- System-memory PTs.
- LPTE "invalid" state.
- (Tegra) Use of video memory aperture.

Adds support for marking LPTEs invalid, resulting in the corresponding
SPTEs being ignored, which is supposed to speed up TLB invalidates.

On The Tegra side, this will switch to using the video memory aperture
for all mappings.  The HW will still target non-coherent system memory,
but this aperture needs to be selected in order to support compression.

Tegra's instmem backend somewhat cheated to get this effect previously.

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

...

This commit is contained in:

Ben Skeggs 2017-11-01 03:56:19 +10:00

parent b77791da0e

commit b597764327

5 changed files with 41 additions and 10 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gk104.c

View file

6

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gk20a.c

View file

4

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.h

View file

17

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgk104.c

View file

18

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgk20a.c

View file