drm/amdkfd: Ensure gpu_id is unique

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gpu_id needs to be unique for user space to identify GPUs via KFD
interface. In the current implementation there is a very small
probability of having non unique gpu_ids.

v2: Add check to confirm if gpu_id is unique. If not unique, find one
    Changed commit header to reflect the above
v3: Use crc16 as suggested-by: Lijo Lazar <lijo.lazar@amd.com>
    Ensure that gpu_id != 0

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Harish Kasiviswanathan 2024-05-01 17:07:59 -04:00 • committed by Alex Deucher

parent b712d7c201

commit 3ed181b8ff

1 changed files with 34 additions and 6 deletions

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drivers/gpu/drm/amd/amdkfd/kfd_topology.c

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