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gpu: nvgpu: add refcounting for MMU debug mode

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GPC MMU debug mode should be set if at least one channel
in the TSG has requested it. Add refcounting for MMU debug
mode, to make sure debug mode is disabled only when no
channel in the TSG is using it.

Bug 2515097

Change-Id: Ic5530f93523a9ec2cd3bfebc97adf7b7000531e0
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2123017
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Thomas Fleury
2019-04-30 17:19:51 -07:00
committed by mobile promotions
parent 741723e81a
commit a1248d87fe
5 changed files with 68 additions and 2 deletions
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3
drivers/gpu/nvgpu/os/linux/ioctl_dbg.c
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@@ -1114,10 +1114,11 @@ static int nvgpu_dbg_gpu_ioctl_set_mmu_debug_mode(
ch = nvgpu_dbg_gpu_get_session_channel(dbg_s);
if (!ch) {
nvgpu_err(g, "no bound channel for mmu debug mode");
err = -EINVAL;
goto clean_up;
}
err = g->ops.gr.set_mmu_debug_mode(g, ch, enable);
err = nvgpu_tsg_set_mmu_debug_mode(nvgpu_tsg_from_ch(ch), ch, enable);
if (err) {
nvgpu_err(g, "set mmu debug mode failed, err=%d", err);
}