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gpu: nova-core: correct FRTS vidmem offset calculation

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Currently, the frts vidmem offset is calculated based on the non-wpr
heap size and pmu reservation size, but this is not right. The layout
actually looks like this:

| non-wpr heap | WPR2 .. FRTS | PMU reserved | ... | VGA workspace |

It's just by coincidence + generous alignment that the values happened
to match. Instead, define a per-architecture reserved size at the end of
the framebuffer and use this plus the PMU reserved size to calculate the
frts vidmem offset.

Fixes: d317e4585f ("gpu: nova-core: Hopper/Blackwell: add FSP Chain of Trust boot")
Signed-off-by: Eliot Courtney <ecourtney@nvidia.com>
Link: https://patch.msgid.link/20260804-blackwell-fixes-v4-1-ac858b6a1935@nvidia.com
[acourbot: add comment clarifying reason for testing pmu_reserved_size.]
[acourbot: make fb_end_reserved_size() return u64.]
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
This commit is contained in:
Eliot Courtney 2026-08-04 14:41:12 +09:00 • committed by Alexandre Courbot
commit 5c9deba557
7 changed files with 48 additions and 10 deletions
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