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linux/drivers/gpu/nova-core/fsp
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Eliot Courtney 5c9deba557 gpu: nova-core: correct FRTS vidmem offset calculation 
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>
2026-08-05 14:20:36 +09:00
..
hal gpu: nova-core: correct FRTS vidmem offset calculation 2026-08-05 14:20:36 +09:00
hal.rs gpu: nova-core: correct FRTS vidmem offset calculation 2026-08-05 14:20:36 +09:00