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authorKonsta Holtta <kholtta@nvidia.com>2018-02-01 10:10:55 -0500
committermobile promotions <svcmobile_promotions@nvidia.com>2018-03-08 07:27:10 -0500
commit4320877eb49ef16a5620536427f77de44bee12b7 (patch)
treebef4e7b948ea132fe3cd695217b9e7693f04275c /drivers/gpu/nvgpu/common/falcon
parentb94770dc4d2d96b80b14b9942595d3e7fc2bbf6c (diff)
gpu: nvgpu: handle semaphore wraparound
Compare gpu semaphores in the kernel in the same way as the hardware does: released if value is over threshold, but at most half of u32's range. This makes it possible to skip zeroing the sema values when semas are allocated, so that they'd be just monotonically increasing numbers like syncpoints are. Jira NVGPU-514 Change-Id: I3bae352fbacfe9690666765b9ecdeae6f0813ea1 Signed-off-by: Konsta Holtta <kholtta@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1652086 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Alex Waterman <alexw@nvidia.com> Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
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