When unbinding a channel from a tsg when virtual, vgpu_tsg_unbind_channel
would return an error if unbinding the channel on the guest side failed,
and did so before notifying the RM server of the unbind.
Later on in the recovery process, the guest OS would remove the channel from the
TSG's list, but this would leave the RM server with an out-of-date channel list.
Fix this by making the tsg_unbind_channel HAL optional and implemented only for vgpu:
the vgpu version now just notifies the RM server so that it can clean up its version
of the TSG; if vgpu, always call the tsg_unbind_channel HAL whether or not
the local unbind succeeded.
Minimal port from dev-main of https://git-master.nvidia.com/r/c/linux-nvgpu/+/2084029
Bug 2766920
Bug 200587845
Change-Id: I75bddf3a28ac20bf4fb7510ff64097a32c7eec3f
Signed-off-by: Peter Daifuku <pdaifuku@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2287774
(cherry picked from commit 471c72c1efcc4fe6d547f556edf7773827fd2674)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2289928
Reviewed-by: Thomas Steinle <tsteinle@nvidia.com>
Reviewed-by: Satish Arora <satisha@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Replaced ch->mmu_debug_mode_enabled with ch->mmu_debug_mode_refcnt.
If channel is enabled multiple times by userspace, then ref count is
updated accordingly. There is an expectation that enable/disable
calls are balanced for setting channel's mmu debug mode.
When unbinding the channel, decrease refcnt for the channel until it
reaches 0.
Also, removed tsg parameter from nvgpu_tsg_set_mmu_debug_mode as it
can be retrieved from ch.
Bug 2515097
Bug 2713590
Change-Id: If334e374a55bd14ae219edbfd3b1fce5ff25c226
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2184702
(cherry picked from commit f422aee393)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2208772
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Kajetan Dutka <kdutka@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Winnie Hsu <whsu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: Kajetan Dutka <kdutka@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
