gpu: nova-core: read vGPU mode from FSP via PRC protocol

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vGPU boot needs to know whether firmware reports vGPU mode as active.

FSP's Management Partition exposes PRC (Product Reconfiguration Control)
as an API for reading device configuration knobs without firmware
updates. The vGPU mode knob is one such configuration value.

Add typed PRC request and response payloads for the vGPU mode object,
add the PRC NVDM type, and parse the returned knob value into VgpuMode.

Signed-off-by: Zhi Wang <zhiw@nvidia.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Link: https://patch.msgid.link/20260722073913.1807677-4-zhiw@nvidia.com
[ FspPrcMessage is small and short-lived; stack-allocate it instead of
  using KBox. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

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This commit is contained in:

Zhi Wang 2026-07-22 10:39:10 +03:00 • committed by Danilo Krummrich

parent 6afbbc27f5

commit 29073113cf

2 changed files with 172 additions and 0 deletions

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170

drivers/gpu/nova-core/fsp.rs

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2

drivers/gpu/nova-core/mctp.rs

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