diff options
| author | Dennis Li <Dennis.Li@amd.com> | 2020-09-01 09:03:53 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-09-03 14:46:55 -0400 |
| commit | 81202807ae6096bfbbfa28c2bc83cae1841bba38 (patch) | |
| tree | c165a6dea757faa271208675fae516c67b74b402 /drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c | |
| parent | f6eb433954bf32ab582208d9b58ec397f7814e5a (diff) | |
drm/amdgpu: block ring buffer access during GPU recovery
When GPU is in reset, its status isn't stable and ring buffer also need
be reset when resuming. Therefore driver should protect GPU recovery
thread from ring buffer accessed by other threads. Otherwise GPU will
randomly hang during recovery.
v2: correct indent
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dennis Li <Dennis.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c index ad9ad622ccce..31359e519d69 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c @@ -287,8 +287,7 @@ static void gmc_v10_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid, */ if (adev->gfx.kiq.ring.sched.ready && (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev)) && - !amdgpu_in_reset(adev)) { - + down_read_trylock(&adev->reset_sem)) { struct amdgpu_vmhub *hub = &adev->vmhub[vmhub]; const unsigned eng = 17; u32 inv_req = hub->vmhub_funcs->get_invalidate_req(vmid, flush_type); @@ -297,6 +296,8 @@ static void gmc_v10_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid, amdgpu_virt_kiq_reg_write_reg_wait(adev, req, ack, inv_req, 1 << vmid); + + up_read(&adev->reset_sem); return; } |