gpu: nvgpu: cyclestats mode E snapshots support

That is a kernel supporting code for cyclestats mode E.
Cyclestats mode E implemented following Windows-design in user-space
and required the following operations to be implemented:
- attach a client for shared hardware buffer of device
- detach client from shared hardware buffer
- flush means copy of available data from hardware buffer to private
  client buffers according to perfmon IDs assigned for clients
- perfmon IDs management for user-space clients
- a NVGPU_GPU_FLAGS_SUPPORT_CYCLE_STATS_SNAPSHOT capability added

Bug 1573150

Change-Id: I9e09f0fbb2be5a95c47e6d80a2e23fa839b46f9a
Signed-off-by: Leonid Moiseichuk <lmoiseichuk@nvidia.com>
Reviewed-on: http://git-master/r/740653
(cherry picked from commit 79fe89fd4cea39d8ab9dbef0558cd806ddfda87f)
Reviewed-on: http://git-master/r/753274
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/Makefile b/drivers/gpu/nvgpu/Makefile
index f20e67b2..053cdde3 100644
--- a/drivers/gpu/nvgpu/Makefile
+++ b/drivers/gpu/nvgpu/Makefile
@@ -82,6 +82,9 @@ nvgpu-$(CONFIG_TEGRA_CLK_FRAMEWORK) += \
 nvgpu-$(CONFIG_GK20A_DEVFREQ) += \
         gk20a/gk20a_scale.o
 
+nvgpu-$(CONFIG_GK20A_CYCLE_STATS) += \
+        gk20a/css_gr_gk20a.o
+
 ifeq ($(CONFIG_ARCH_TEGRA_18x_SOC),y)
 ccflags-$(CONFIG_GK20A) += -I$(srctree)/../kernel-t18x/drivers/gpu/nvgpu
 ccflags-$(CONFIG_GK20A) += -I$(srctree)/../kernel-t18x/include