gpu: nvgpu: enable HWPM Mode-E context switch

- This patch enables HWPM Mode-E context switch for gv11b.
- Write new pm mode to context buffer header. Ucode use
this mode to enable mode-e context switch. This is Mode-B
context switch of PMs with Mode-E streamout on one context.
If this mode is set, Ucode makes sure that Mode-E pipe
(perfmons, routers, pma) is idle before it context switches PMs.
- This allows us to collect counters in a secure way
(i.e. on context basis) with stream out.
- For Mode-E ctxsw it is required that engine_sel
is set to 0xFFFFFFFF.
- Default 0 is a valid signal and causes problems.

Bug 2106999

Change-Id: Idc6380116a71ffd7ae348ceec68cb395b2eca5f6
Signed-off-by: Vaibhav Kachore <vkachore@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1818070
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/hw/gv11b/hw_ctxsw_prog_gv11b.h b/drivers/gpu/nvgpu/include/nvgpu/hw/gv11b/hw_ctxsw_prog_gv11b.h
index 623a8c15..aa8e6190 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/hw/gv11b/hw_ctxsw_prog_gv11b.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/hw/gv11b/hw_ctxsw_prog_gv11b.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2017, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2016-2018, NVIDIA CORPORATION.  All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -144,6 +144,10 @@ static inline u32 ctxsw_prog_main_image_pm_mode_no_ctxsw_f(void)
 {
         return 0x0U;
 }
+static inline u32 ctxsw_prog_main_image_pm_mode_stream_out_ctxsw_f(void)
+{
+        return 0x2U;
+}
 static inline u32 ctxsw_prog_main_image_pm_smpc_mode_m(void)
 {
         return 0x7U << 3U;