drm/amdgpu: Add UALink ring buffer allocation and firmware init

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Allocate pinned memory for firmware metadata, ring buffers, and write
and read pointer pages. Populate per-GPU metadata entries and send them
to MPNHT firmware via SMN mailbox, then poll for a ready acknowledgement.

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 13:37:10 -04:00 • committed by Alex Deucher

parent d9fcb49399

commit 3b53cbaabb

1 changed files with 214 additions and 0 deletions

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

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