gpu: nvgpu: create a wrapper over sync_fences

This patch constructs an abstraction to hide the sync_fence
functionality from the common code. struct nvgpu_os_fence acts as an
abstraction for struct sync_fence.

struct nvgpu_os_fence consists of an ops structure named nvgpu_os_fence_ops
which contains an API to do pushbuffer programming to generate wait
commands for the fence.

The current implementation of nvgpu only allows for wait method on a
sync_fence which was generated using a similar backend(i.e. either
Nvhost Syncpoints or Semaphores). In this patch, a
generic API is introduced which will decide the type of the underlying
implementation of the struct nvgpu_os_fence at runtime and run the
corresponding wait implementation on it.

This patch changes the channel_sync_gk20a's semaphore specific
implementation to use the abstract API. A subsequent patch will make
the changes for the nvhost_syncpoint based implementations as well.

JIRA NVGPU-66

Change-Id: If6675bfde5885c3d15d2ca380bb6c7c0e240e734
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1667218
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/Makefile b/drivers/gpu/nvgpu/Makefile
index 32166f31..9a46f12c 100644
--- a/drivers/gpu/nvgpu/Makefile
+++ b/drivers/gpu/nvgpu/Makefile
@@ -160,7 +160,9 @@ nvgpu-$(CONFIG_TEGRA_GK20A) += \
         common/linux/platform_gp10b_tegra.o \
         common/linux/platform_gv11b_tegra.o
 
-nvgpu-$(CONFIG_SYNC) += gk20a/sync_gk20a.o
+nvgpu-$(CONFIG_SYNC) += gk20a/sync_gk20a.o \
+                common/linux/os_fence_android.o \
+                common/linux/os_fence_android_sema.o
 
 nvgpu-$(CONFIG_GK20A_PCI) += common/linux/pci.o \
         common/linux/pci_usermode.o \