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gpu: nvgpu: use refcnt for ch mmu_debug_mode

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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
This commit is contained in:
Thomas Fleury
2019-08-27 10:09:51 -04:00
committed by mobile promotions
parent e0587aaf4d
commit e41fd09031
5 changed files with 23 additions and 16 deletions
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2
drivers/gpu/nvgpu/os/linux/ioctl_dbg.c
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@@ -1112,7 +1112,7 @@ static int nvgpu_dbg_gpu_ioctl_set_mmu_debug_mode(
goto clean_up;
}
err = nvgpu_tsg_set_mmu_debug_mode(tsg_gk20a_from_ch(ch), ch, enable);
err = nvgpu_tsg_set_mmu_debug_mode(ch, enable);
if (err) {
nvgpu_err(g, "set mmu debug mode failed, err=%d", err);
}