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gpu: nvgpu: err if powergate is enabled before hwpm ctxsw mode write

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If the power gating mode is not disabled before hwpm
context switch mode register write, return error.

Bug 200379815
Bug 2053656
Bug 2092996

Change-Id: I656f5c38616a4250830779d2bca5e207ff28f3a9
Signed-off-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1688219
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Seema Khowala
2018-04-03 18:52:56 -07:00
committed by mobile promotions
parent 31024f85eb
commit 24cf5916b7
1 changed files with 8 additions and 6 deletions
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14
drivers/gpu/nvgpu/common/linux/ioctl_dbg.c
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@@ -1020,8 +1020,7 @@ static int nvgpu_dbg_gpu_ioctl_hwpm_ctxsw_mode(struct dbg_session_gk20a *dbg_s,
struct gk20a *g = dbg_s->g;
struct channel_gk20a *ch_gk20a;
gk20a_dbg_fn("%s pm ctxsw mode = %d",
g->name, args->mode);
nvgpu_log_fn(g, "%s pm ctxsw mode = %d", g->name, args->mode);
/* Must have a valid reservation to enable/disable hwpm cxtsw.
* Just print an error message for now, but eventually this should
@@ -1049,13 +1048,16 @@ static int nvgpu_dbg_gpu_ioctl_hwpm_ctxsw_mode(struct dbg_session_gk20a *dbg_s,
err = -EINVAL;
goto clean_up;
}
if (!dbg_s->is_pg_disabled) {
nvgpu_err(g, "powergate is not disabled");
err = -ENOSYS;
goto clean_up;
}
err = g->ops.gr.update_hwpm_ctxsw_mode(g, ch_gk20a, 0,
args->mode == NVGPU_DBG_GPU_HWPM_CTXSW_MODE_CTXSW);
args->mode == NVGPU_DBG_GPU_HWPM_CTXSW_MODE_CTXSW);
if (err)
nvgpu_err(g,
"error (%d) during pm ctxsw mode update", err);
"error (%d) during pm ctxsw mode update", err);
/* gk20a would require a WAR to set the core PM_ENABLE bit, not
* added here with gk20a being deprecated
*/