From 0230676eb4da2e340777783362fcc5d2cd38fc84 Mon Sep 17 00:00:00 2001 From: Emily Deng Date: Wed, 22 Aug 2018 20:18:25 +0800 Subject: [PATCH 5335/5725] amdgpu: fix multi-process hang issue MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit SWDEV-146499: hang during multi vulkan process testing cause: the second frame's PREAMBLE_IB have clear-state and LOAD actions, those actions ruin the pipeline that is still doing process in the previous frame's work-load IB. fix: need insert pipeline sync if have context switch for SRIOV (because only SRIOV will report PREEMPTION flag to UMD) Signed-off-by: Monk Liu Signed-off-by: Emily Deng Reviewed-by: Christian König Signed-off-by: Alex Deucher Signed-off-by: Raveendra Talabattula --- drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c index a38daa3..1d86c3b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c @@ -171,8 +171,10 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs, return r; } + need_ctx_switch = ring->current_ctx != fence_ctx; if (ring->funcs->emit_pipeline_sync && job && ((tmp = amdgpu_sync_get_fence(&job->sched_sync, NULL)) || + (amdgpu_sriov_vf(adev) && need_ctx_switch) || amdgpu_vm_need_pipeline_sync(ring, job))) { need_pipe_sync = true; @@ -206,7 +208,6 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs, amdgpu_ring_emit_hdp_flush(ring); skip_preamble = ring->current_ctx == fence_ctx; - need_ctx_switch = ring->current_ctx != fence_ctx; if (job && ring->funcs->emit_cntxcntl) { if (need_ctx_switch) status |= AMDGPU_HAVE_CTX_SWITCH; -- 2.7.4