gpu: nova-core: Hopper: use correct sysmem flush registers

Browse source

Hopper has its own FBHUB sysmem flush page registers, but the Hopper
framebuffer HAL delegates to the Ampere NISO path, which encodes the
address with an 8-bit right-shift. That programs the wrong value into
the wrong registers, so the GPU's sysmembar flush targets the wrong
system memory address.

Add Hopper's FBHUB flush registers and program them directly from the
Hopper HAL.

This has not yet been tested on real Hopper hardware (that's true for
nova-core in general).

Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Link: https://patch.msgid.link/20260611011901.84517-3-jhubbard@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>

...

This commit is contained in:

John Hubbard 2026-06-10 18:19:00 -07:00 • committed by Alexandre Courbot

parent 21baef6202

commit 84d5875437

2 changed files with 47 additions and 3 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

31

drivers/gpu/nova-core/fb/hal/gh100.rs

View file

19

drivers/gpu/nova-core/regs.rs

View file