[Bug 94081] [radeon 3.18 regression] GPU reset recovery fails

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=94081

--- Comment #1 from Jan Vesely <jan.vesely at rutgers.edu> ---
here's dmesg output for 3.17 kernel:
(looks like ib test on ring 5 is missing in 3.18)

[  249.015280] radeon 0000:01:00.0: ring 0 stalled for more than 10000msec
[  249.015287] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000742
last fence id 0x0000000000000741 on ring 0)
[  249.027303] radeon 0000:01:00.0: ring 0 stalled for more than 10012msec
[  249.027309] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000745
last fence id 0x0000000000000741 on ring 0)
[  249.131987] radeon 0000:01:00.0: Saved 183 dwords of commands on ring 0.
[  249.132005] radeon 0000:01:00.0: GPU softreset: 0x00000009
[  249.132007] radeon 0000:01:00.0:   GRBM_STATUS               = 0xA0433828
[  249.132009] radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x08000007
[  249.132010] radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
[  249.132012] radeon 0000:01:00.0:   SRBM_STATUS               = 0x20000AC0
[  249.132014] radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
[  249.132015] radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
[  249.132017] radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00018000
[  249.132019] radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00010002
[  249.132021] radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x80038647
[  249.132023] radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
[  249.142433] radeon 0000:01:00.0: GRBM_SOFT_RESET=0x00007F6B
[  249.142486] radeon 0000:01:00.0: SRBM_SOFT_RESET=0x00000100
[  249.143643] radeon 0000:01:00.0:   GRBM_STATUS               = 0x00003828
[  249.143644] radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000007
[  249.143646] radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
[  249.143648] radeon 0000:01:00.0:   SRBM_STATUS               = 0x200000C0
[  249.143649] radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
[  249.143651] radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
[  249.143653] radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
[  249.143654] radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
[  249.143656] radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x00000000
[  249.143658] radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
[  249.143681] radeon 0000:01:00.0: GPU reset succeeded, trying to resume
[  249.165960] [drm] enabling PCIE gen 2 link speeds, disable with
radeon.pcie_gen2=0
[  249.167181] [drm] PCIE GART of 1024M enabled (table at 0x0000000000273000).
[  249.167273] radeon 0000:01:00.0: WB enabled
[  249.167274] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr
0x0000000040000c00 and cpu addr 0xffff880401eeac00
[  249.167276] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr
0x0000000040000c0c and cpu addr 0xffff880401eeac0c
[  249.168728] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr
0x0000000000072118 and cpu addr 0xffffc900062b2118
[  249.185032] [drm] ring test on 0 succeeded in 3 usecs
[  249.185042] [drm] ring test on 3 succeeded in 6 usecs
[  249.362220] [drm] ring test on 5 succeeded in 2 usecs
[  249.362228] [drm] UVD initialized successfully.
[  249.362280] [drm:r600_ib_test] *ERROR* radeon: fence wait failed (-35).
[  249.362281] [drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on
GFX ring (-35).
[  249.362282] radeon 0000:01:00.0: ib ring test failed (-35).
[  249.370592] radeon 0000:01:00.0: GPU reset succeeded, trying to resume
[  249.377656] [drm] enabling PCIE gen 2 link speeds, disable with
radeon.pcie_gen2=0
[  249.378860] [drm] PCIE GART of 1024M enabled (table at 0x0000000000273000).
[  249.378951] radeon 0000:01:00.0: WB enabled
[  249.378952] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr
0x0000000040000c00 and cpu addr 0xffff880401eeac00
[  249.378954] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr
0x0000000040000c0c and cpu addr 0xffff880401eeac0c
[  249.380537] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr
0x0000000000072118 and cpu addr 0xffffc900062b2118
[  249.396825] [drm] ring test on 0 succeeded in 3 usecs
[  249.396835] [drm] ring test on 3 succeeded in 7 usecs
[  249.574006] [drm] ring test on 5 succeeded in 2 usecs
[  249.574014] [drm] UVD initialized successfully.
[  249.574061] [drm] ib test on ring 0 succeeded in 0 usecs
[  249.574105] [drm] ib test on ring 3 succeeded in 0 usecs
[  249.726529] [drm] ib test on ring 5 succeeded

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