• Andrey Grodzovsky's avatar
    drm/amdgpu: Avoid HW GPU reset for RAS. · 7c6e68c7
    Andrey Grodzovsky authored
    Problem:
    Under certain conditions, when some IP bocks take a RAS error,
    we can get into a situation where a GPU reset is not possible
    due to issues in RAS in SMU/PSP.
    
    Temporary fix until proper solution in PSP/SMU is ready:
    When uncorrectable error happens the DF will unconditionally
    broadcast error event packets to all its clients/slave upon
    receiving fatal error event and freeze all its outbound queues,
    err_event_athub interrupt  will be triggered.
    In such case and we use this interrupt
    to issue GPU reset. THe GPU reset code is modified for such case to avoid HW
    reset, only stops schedulers, deatches all in progress and not yet scheduled
    job's fences, set error code on them and signals.
    Also reject any new incoming job submissions from user space.
    All this is done to notify the applications of the problem.
    
    v2:
    Extract amdgpu_amdkfd_pre/post_reset from amdgpu_device_lock/unlock_adev
    Move amdgpu_job_stop_all_jobs_on_sched to amdgpu_job.c
    Remove print param from amdgpu_ras_query_error_count
    
    v3:
    Update based on prevoius bug fixing patch to properly call amdgpu_amdkfd_pre_reset
    for other XGMI hive memebers.
    Signed-off-by: default avatarAndrey Grodzovsky <andrey.grodzovsky@amd.com>
    Acked-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
    Reviewed-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
    Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
    7c6e68c7
sdma_v4_0.c 77.1 KB