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| author | Nitin Gote <nitin.r.gote@intel.com> | 2024-10-15 17:57:10 +0300 |
|---|---|---|
| committer | Andi Shyti <andi.shyti@linux.intel.com> | 2024-10-22 12:35:07 +0300 |
| commit | 6ef0e3ef2662db71d363af77ce31fa940bb7d525 (patch) | |
| tree | 1299f8a8ee504c2212b59a9cec8dd29bf39d2844 /drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | |
| parent | e217f22041fe2478e8ab6e4cfa1774089db9a918 (diff) | |
| download | linux-6ef0e3ef2662db71d363af77ce31fa940bb7d525.tar.xz | |
drm/i915/gt: Retry RING_HEAD reset until it get sticks
we see an issue where resets fails because the engine resumes
from an incorrect RING_HEAD. Since the RING_HEAD doesn't point
to the remaining requests to re-run, but may instead point into
the uninitialised portion of the ring, the GPU may be then fed
invalid instructions from a privileged context, oft pushing the
GPU into an unrecoverable hang.
If at first the write doesn't succeed, try, try again.
v2: Avoid unnecessary timeout macro (Andi)
v3: Correct comment format (Andi)
v4: Make it generic for all platform as it won't impact (Chris)
Link: https://gitlab.freedesktop.org/drm/intel/-/issues/5432
Testcase: igt/i915_selftest/hangcheck
Signed-off-by: Chris Wilson <chris.p.wilson@linux.intel.com>
Signed-off-by: Nitin Gote <nitin.r.gote@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241015145710.2478599-1-nitin.r.gote@intel.com
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_job.c')
0 files changed, 0 insertions, 0 deletions