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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
Bug 2713590

Change-Id: Ic5530f93523a9ec2cd3bfebc97adf7b7000531e0
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2123017
(cherry picked from commit a1248d87fe)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2208769
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
2019-04-30 17:19:51 -07:00
committed by mobile promotions
parent 41a85b8d2a
commit 9e328ed6b8
5 changed files with 64 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/nvgpu/os/linux/ioctl_dbg.c
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@@ -1107,10 +1107,11 @@ 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(tsg_gk20a_from_ch(ch), ch, enable);
if (err) {
nvgpu_err(g, "set mmu debug mode failed, err=%d", err);
}