drm/amdkfd: bump kfd ioctl minor version for event age availability
authorJames Zhu <James.Zhu@amd.com>
Wed, 7 Jun 2023 17:27:40 +0000 (13:27 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Thu, 15 Jun 2023 15:37:55 +0000 (11:37 -0400)
commitd297eedf83f5af96751c0da1e4355c19244a55a2
tree4bf51b03208158874fc40d61d6df5cf8598c1e3e
parent973fddea6f3e0d2f623f13fbd5d4d2b775e157f0
drm/amdkfd: bump kfd ioctl minor version for event age availability

Bump the minor version to declare event age tracking feature is now
available.

In kernel amdgpu driver, kfd_wait_on_events is used to support user
space signal event wait function. For multiple threads waiting on same
event scenery, race condition could occur since some threads after
checking signal condition, before calling kfd_wait_on_events, the
event interrupt could be fired and wake up other thread which are
sleeping on this event. Then those threads could fall into sleep
without waking up again. Adding event age tracking in both kernel and
user mode, will help avoiding this race condition.

Proposed ROCT-Thunk-Interface:
https://github.com/RadeonOpenCompute/ROCT-Thunk-Interface/commit/efdbf6cfbc026bd68ac3c35d00dacf84370eb81e
https://github.com/RadeonOpenCompute/ROCT-Thunk-Interface/commit/1820ae0a2db85b6f584611dc0cde1a00e7c22915

Proposed ROCR-Runtime:
https://github.com/RadeonOpenCompute/ROCR-Runtime/compare/master...zhums:ROCR-Runtime:new_event_wait_review
https://github.com/RadeonOpenCompute/ROCR-Runtime/commit/e1f5bdb88eb882ac798aeca2c00ea3fbb2dba459
https://github.com/RadeonOpenCompute/ROCR-Runtime/commit/7d26afd14107b5c2a754c1a3f415d89f3aabb503

Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
include/uapi/linux/kfd_ioctl.h