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gpu: nvgpu: make debugger register access ELPG protected

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Some of the APIs that access debugger register are not protected
from ELPG. This might trigger PRI access timeouts for corresponding
registers if GR engine is power gated.

Add nvgpu_pg_elpg_protected_call() to protect against ELPG.

Bug 2820066

Change-Id: I467ea28aaea1c0e36c2d6aabce6a2daea6ee9911
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2306383
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Deepak Nibade
2020-03-03 15:58:42 +05:30
committed by Alex Waterman
parent 31b8ecbcee
commit 7a4ecc8966
1 changed files with 8 additions and 4 deletions
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12
drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c
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@@ -720,7 +720,8 @@ static int nvgpu_gpu_ioctl_trigger_suspend(struct gk20a *g)
return err;
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
err = g->ops.gr.trigger_suspend(g);
err = nvgpu_pg_elpg_protected_call(g,
g->ops.gr.trigger_suspend(g));
nvgpu_mutex_release(&g->dbg_sessions_lock);
gk20a_idle(g);
@@ -757,7 +758,8 @@ static int nvgpu_gpu_ioctl_wait_for_pause(struct gk20a *g,
}
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
g->ops.gr.wait_for_pause(g, w_state);
(void)nvgpu_pg_elpg_protected_call(g,
g->ops.gr.wait_for_pause(g, w_state));
for (sm_id = 0; sm_id < no_of_sm; sm_id++) {
ioctl_w_state[sm_id].valid_warps[0] =
@@ -800,7 +802,8 @@ static int nvgpu_gpu_ioctl_resume_from_pause(struct gk20a *g)
return err;
nvgpu_mutex_acquire(&g->dbg_sessions_lock);
err = g->ops.gr.resume_from_pause(g);
err = nvgpu_pg_elpg_protected_call(g,
g->ops.gr.resume_from_pause(g));
nvgpu_mutex_release(&g->dbg_sessions_lock);
gk20a_idle(g);
@@ -816,7 +819,8 @@ static int nvgpu_gpu_ioctl_clear_sm_errors(struct gk20a *g)
if (err)
return err;
err = g->ops.gr.clear_sm_errors(g);
err = nvgpu_pg_elpg_protected_call(g,
g->ops.gr.clear_sm_errors(g));
gk20a_idle(g);