diff options
| author | Jiadong Zhu <[email protected]> | 2023-05-24 11:42:19 +0800 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2023-06-13 16:51:05 -0400 |
| commit | 1dbcf770cc2d15baf8a1e8174d6fd014a68b45ca (patch) | |
| tree | c35dc479e88f7e695057fe0687ca32f5d1a62861 /drivers/fpga/fpga-mgr.c | |
| parent | 858fd168a95c5b9669aac8db6c14a9aeab446375 (diff) | |
drm/amdgpu: Reset CP_VMID_PREEMPT after trailing fence signaled
When MEC executes unmap_queue for mid command buffer preemption, it will
kick the write pointer of the gfx ring, set CP_VMID_PREEMPT to trigger the
preemption and wait for CP_VMID_PREEMPT becomes zero after the preemption
done. There is a race condition that PFP may excute the resetting command
before MEC set CP_VMID_PREEMPT. As a result, hang happens as
CP_VMID_PREEMPT is always 0xffff.
To avoid this, we send resetting CP_VMID_PREEMPT command after the trailing
fence is siganled and update gfx write pointer explicitly.
Signed-off-by: Jiadong Zhu <[email protected]>
Acked-by: Alex Deucher <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Cc: [email protected] # 6.3.x
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2535
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions