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gpu: nvgpu: Unify remove/shutdown codepaths

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The following changes are part of the porting of the bind/unbind
functionality.

These changes reuse the shutdown codepaths in iGPU and dGPU and fix a locking
issue with in gk20a_busy() where the usage count can lead to a deadlock during
the driver shutdown. It fixes a racing condition with the gr/mm code by
invalidating the sw ready flag while holding the busy lock

JIRA: EVLR-1739

Change-Id: I62ce47378436b21f447f4cd93388759ed3f9bad1
Signed-off-by: David Nieto <dmartineznie@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1554959
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
David Nieto
2017-09-07 16:12:44 -07:00
committed by mobile promotions
parent 980bf96bf2
commit ef6ea3475c
4 changed files with 88 additions and 81 deletions
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2
drivers/gpu/nvgpu/common/linux/module.h
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@@ -19,6 +19,8 @@ struct device;
int gk20a_pm_finalize_poweron(struct device *dev);
void gk20a_remove_support(struct gk20a *g);
void gk20a_driver_start_unload(struct gk20a *g);
int nvgpu_quiesce(struct gk20a *g);
int nvgpu_remove(struct device *dev, struct class *class);
extern struct class nvgpu_class;