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drm/amdgpu: Add sysfs API for UALink information

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<device>/ualink/info: Directory contains current UALink attributes
- link_type: UALoE of UALink
- accel_state: unconfigured, configured, ready, active, error
- accel_id: Accelerator ID
- ppod_id: Physical pod ID (UUID)
- ppod_size: Number of accelerators in physical pod
- bandwidth: Estimated total bandwidth between pairs of accelerators
- latency: Estimated latency between pairs of accelerators
- vpod_id: Virtual pod ID
- vpod_size: Number of accelerators in virtual pod
- vpod_active_accels: List of all accelerator IDs in vpod
- local_accels: List of local accelerator IDs in vpod
- addr_mode: source-aliasing or source-identification

Signed-off-by: Felix Kuehling <felix.kuehling@amd.com>
Reviewed-by: Mukul Joshi <mukul.joshi@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Felix Kuehling 2026-04-07 15:13:52 -04:00 • committed by Alex Deucher
commit 4611cec1b2
5 changed files with 342 additions and 0 deletions
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