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authorDebarshi Dutta <ddutta@nvidia.com>2020-04-14 06:58:53 -0400
committermobile promotions <svcmobile_promotions@nvidia.com>2020-04-16 12:55:31 -0400
commit9d1e07ca184869eb0082b418d0d1cf6e62af3a40 (patch)
treeb1a0f0ce6a872dfc9622ff3d65f967154890e509 /userspace/units/posix-mockio
parent06942bd268fca1bbe37f11710cfc655708291ecc (diff)
gpu: nvgpu: change system suspend's implementation
Currently, for platforms with canRailgate device characteristics disabled, suspend can block as deterministic channels hold busy references. This patch makes the change to first hold off any new jobs for deterministic channels and then reverts back the busy references taken by those channels. Following this, suspend also waits for the device to get idle by waiting (with timeout) for the nvgpu's internal usage counter to be come zero. This ensures there are no further jobs in progress and allows the system to go into a suspend state. Bug 200598228 Bug 2930266 Change-Id: Id02b4d41a9c2dd64303b2e2449dbed48c12aea4c Signed-off-by: Debarshi Dutta <ddutta@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2328489 Reviewed-by: automaticguardword <automaticguardword@nvidia.com> Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Konsta Holtta <kholtta@nvidia.com> Reviewed-by: Shashank Singh <shashsingh@nvidia.com> Reviewed-by: Sami Kiminki <skiminki@nvidia.com> Reviewed-by: Alex Waterman <alexw@nvidia.com> Reviewed-by: Bibek Basu <bbasu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit
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