[Bug 111763] ring_gfx hangs/freezes on Navi gpus

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111763

            Bug ID: 111763
           Summary: ring_gfx hangs/freezes on Navi gpus
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: not set
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: popovic.marko at protonmail.com

I'm making this topic as a separate tracking of ring_gfx related bugs since we
should keep https://bugs.freedesktop.org/show_bug.cgi?id=111481 related to
sdma0/1 type freezes since those are ones that seem to cause random "Out of the
blue" hangs on the desktop.

There is another type of freeze/hang happening when playing Starcraft II via
D9VK. This one doesn't seem to be related to either ngg or dma because I have
them both disabled by AMD_DEBUG=nodma and AMD_DEBUG=nongg and the hangs occur
anyway, on exactly the same place every time.

Error logs:
sep 17 11:48:24 Marko-PC kernel: [drm:amdgpu_dm_commit_planes.constprop.0
[amdgpu]] *ERROR* Waiting for fences timed out or interrupted!
sep 17 11:48:24 Marko-PC kernel: [drm:amdgpu_job_timedout [amdgpu]] *ERROR*
ring gfx_0.0.0 timeout, signaled seq=2361623, emitted seq=2361625
sep 17 11:48:24 Marko-PC kernel: [drm:amdgpu_job_timedout [amdgpu]] *ERROR*
Process information: process SC2_x64.exe pid 20236 thread SC2_x64.exe pid 20236

I will try and provide trace files by using renderdoc for described issues.
They also happen in native games like Rise of the Tomb Raider and Vulkan etc.
Will provide as much info as possible.

Using Kernel 5.3, MESA 19.2 and llvm9.

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