[Bug 103634] nv_conditional_render tests hang the gpu (HD 5750)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103634

            Bug ID: 103634
           Summary: nv_conditional_render tests hang the gpu (HD 5750)
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: sroland at vmware.com
        QA Contact: dri-devel at lists.freedesktop.org

Nearly all of piglit's nv_conditional_render tests (I think 10 out of 12, I'd
rather not retry them all since it sometimes brings down the box after the gpu
reset) immediately hang the gpu - nv_conditional_render-begin-xxx are the two
exceptions (which pass).
GPU is Juniper, HD 5750.
I'm not sure if this is even a regression, as I never ran piglit on this box
before, and at least with mesa 17.1.8 it hangs all the same as current git
master. If the kernel version matters, I tried some 4.9 and some 4.13 kernel.

[  749.782315] radeon 0000:01:00.0: ring 0 stalled for more than 10224msec
[  749.782319] radeon 0000:01:00.0: GPU lockup (current fence id
0x0000000000004081 last fence id 0x0000000000004
...

[  771.466593] radeon 0000:01:00.0: Saved 882 dwords of commands on ring 0.
[  771.906456] radeon 0000:01:00.0: GPU softreset: 0x0000001D
[  771.906458] radeon 0000:01:00.0:   GRBM_STATUS               = 0xA0001828
[  771.906459] radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000003
[  771.906460] radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
[  771.906461] radeon 0000:01:00.0:   SRBM_STATUS               = 0x20000AC0
[  771.906462] radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
[  771.906463] radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
[  771.906464] radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
[  771.906465] radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000006
[  771.906466] radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x80008E47
[  771.906468] radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
[  771.914331] radeon 0000:01:00.0: GRBM_SOFT_RESET=0x00007F6B
[  771.914382] radeon 0000:01:00.0: SRBM_SOFT_RESET=0x00100100
[  771.915528] radeon 0000:01:00.0:   GRBM_STATUS               = 0x00003828
[  771.915529] radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000007
[  771.915530] radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
[  771.915531] radeon 0000:01:00.0:   SRBM_STATUS               = 0x200000C0
[  771.915532] radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
[  771.915533] radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
[  771.915534] radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
[  771.915535] radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
[  771.915536] radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x00000000
[  771.915538] radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
[  771.915554] radeon 0000:01:00.0: GPU reset succeeded, trying to resume

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