drm/amdgpu: Add UALink NPA address computation for ring buffers

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Add a ring buffer type enum and address formula for the reserved NPA
space between source and destination GPUs, covering both addressing
modes. Add a GART-adjusted variant so the local SDMA engine can address
remote GPU buffers.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Philip Yang 2026-03-25 13:37:09 -04:00 • committed by Alex Deucher

parent b266d504ac

commit 5d7094267d

1 changed files with 97 additions and 0 deletions

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

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