re: kern/60732: amdgpu attempts to take (sleeping) mutex while holding a spin lock

[matthew green <mrg%eterna23.net@localhost>]

OK, i think this stops the crash, but reset doesn't work :)

starting X the first time seems to have triggered the reset that was
causing this issue, but it has hung X with this in dmesg:

[  34.7230317] {drm:netbsd:amdgpu_job_timedout+0xad} *ERROR* ring gfx_0.0.0 timeout, signaled seq=6, emitted seq=7
[  34.7330320] {drm:netbsd:amdgpu_job_timedout+0xc9} *ERROR* Process information: process X pid 2410 thread X:cs0 pid 2415
[  34.7530318] amdgpu0: GPU reset begin!
[  35.2730324] {drm:netbsd:gfx_v10_0_hw_fini+0x133} *ERROR* KGQ disable failed
[  35.5930331] {drm:netbsd:gfx_v10_0_hw_fini+0x93} *ERROR* KCQ disable failed
[  35.9030342] {drm:netbsd:gfx_v10_0_hw_fini+0x56} *ERROR* failed to halt cp gfx
[  35.9330338] amdgpu0: GPU mode1 reset
[  36.4230349] [drm] psp mode1 reset succeed 
[  37.7730380] amdgpu0: GPU reset succeeded, trying to resume
[  37.7830381] [drm] PCIE GART of 512M enabled (table at 0x0000008000900000).
[  37.7930381] [drm] PSP is resuming...
[  37.9630384] [drm] reserve 0x900000 from 0x80be400000 for PSP TMR
[  38.0130385] amdgpu0: warn: RAS: ras ta ucode is not available
[  38.0630387] [drm] kiq ring mec 2 pipe 1 q 0
[  38.3630394] amdgpu0 {drm:netbsd:amdgpu_ring_test_helper+0x4a} *ERROR* ring comp_1.0.0 test failed (-60)
[  38.3730394] {drm:netbsd:amdgpu_device_ip_resume_phase2+0x9f} *ERROR* resume of IP block <gfx_v10_0> failed -60
[  38.3830394] amdgpu0: GPU reset(1) failed
[  38.3830394] amdgpu0: GPU reset end with ret = -60
[  48.3830624] {drm:netbsd:amdgpu_job_timedout+0xad} *ERROR* ring gfx_0.0.0 timeout, signaled seq=7, emitted seq=7
[  48.4030631] {drm:netbsd:amdgpu_job_timedout+0xc9} *ERROR* Process information: process X pid 2410 thread X:cs0 pid 2415
[  48.4130624] amdgpu0: GPU reset begin!

ie, this can now debug the real problem... whatever is timing out
or triggering the reset, probably is why it fails to reset.

can probably close this PR, and i'll file another one when i have
enough info about the above.

thanks!


.mrg.