• Ahmad Rehman's avatar
    drm/amdgpu: Init zone device and drm client after mode-1 reset on reload · f679fd60
    Ahmad Rehman authored
    In passthrough environment, when amdgpu is reloaded after unload, mode-1
    is triggered after initializing the necessary IPs, That init does not
    include KFD, and KFD init waits until the reset is completed. KFD init
    is called in the reset handler, but in this case, the zone device and
    drm client is not initialized, causing app to create kernel panic.
    
    v2: Removing the init KFD condition from amdgpu_amdkfd_drm_client_create.
    As the previous version has the potential of creating DRM client twice.
    
    v3: v2 patch results in SDMA engine hung as DRM open causes VM clear to SDMA
    before SDMA init. Adding the condition to in drm client creation, on top of v1,
    to guard against drm client creation call multiple times.
    Signed-off-by: default avatarAhmad Rehman <Ahmad.Rehman@amd.com>
    Reviewed-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
    Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
    f679fd60
amdgpu_amdkfd.c 22 KB