drm/amdgpu: query the reserved info with get_fw_reserved_info

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Extend amdgpu_ttm_init_fw_resv_region() to honour the
->get_fw_reserved_info().

Previously the FW carveout was hardcoded and placed at the top of VRAM
(real_vram_size - reserve_size):
 - a hard-coded 144/256 MB for GC 12.1.0;
 - or DISCOVERY_TMR_OFFSET fallback.

The hard-coded GC 12.1.0 path is replaced by ->get_fw_reserved_info(),
which returns a (size, offset_within_VRAM) pair derived from the
MASTER_DIE_UMF_REGION embedded in IP discovery, and falls back only
when the discovery region is missing or invalid.

v1->v2: Remove !adev->bios check, and call the get_fw_reserved_info
    interface when it is available. (suggested by Hawking)

Suggested-by: Lijo Lazar <lijo.lazar@amd.com>
Suggested-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Feifei Xu 2026-05-12 10:39:11 +08:00 • committed by Alex Deucher

parent afa9574fb5

commit 2eee94d2e0

1 changed files with 15 additions and 11 deletions

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drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

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