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gpu: nvgpu: add refcounting for ctxsw disable/enable

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ctxsw disable could be called recursively for RM server. Suspend
contexts disables ctxsw at the beginning, then call tsg disable and
preempt. If preempt timeout happens, it goes to recovery path, which
will try to disable ctxsw again. More details on Bug 200331110.

Jira VQRM-2982

Change-Id: I4659c842ae73ed59be51ae65b25366f24abcaf22
Signed-off-by: Shashank Singh <shashsingh@nvidia.com>
Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1671716
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sourab Gupta <sourabg@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Shashank Singh
2017-12-28 11:52:14 +05:30
committed by mobile promotions
parent 02956adcd3
commit db089a73a5
4 changed files with 29 additions and 7 deletions
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drivers/gpu/nvgpu/common/linux/driver_common.c
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@@ -62,6 +62,7 @@ static void nvgpu_init_vars(struct gk20a *g)
nvgpu_mutex_init(&g->client_lock);
nvgpu_mutex_init(&g->poweron_lock);
nvgpu_mutex_init(&g->poweroff_lock);
nvgpu_mutex_init(&g->ctxsw_disable_lock);
l->regs_saved = l->regs;
l->bar1_saved = l->bar1;