gpu: nvgpu: remove sync_fence dependencies from fence_gk20a

Replaced all instances of sync_fence in gk20a_fence* code with
nvgpu_os_fence. Added the API install_fence for the nvgpu_os_fence
abstraction. sync_fence mechanism and its dependencies are completely
removed from the fence_gk20a methods. Due to the recent os_fence changes
and the changes to fence_gk20a, we can finally get rid of all the CONFIG_SYNCS
present in the submit path.

JIRA NVGPU-66

Change-Id: I3551dab04b93b1e94db83fc102a41872be89e9ed
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1701245
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/linux/os_fence_android.h b/drivers/gpu/nvgpu/include/nvgpu/linux/os_fence_android.h
index 39d08339..201b5306 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/linux/os_fence_android.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/linux/os_fence_android.h
@@ -39,6 +39,8 @@ void nvgpu_os_fence_init(struct nvgpu_os_fence *fence_out,
         struct gk20a *g, const struct nvgpu_os_fence_ops *fops,
         struct sync_fence *fence);
 
+void nvgpu_os_fence_android_install_fd(struct nvgpu_os_fence *s, int fd);
+
 int nvgpu_os_fence_syncpt_fdget(
         struct nvgpu_os_fence *fence_out,
         struct channel_gk20a *c, int fd);
diff --git a/drivers/gpu/nvgpu/include/nvgpu/os_fence.h b/drivers/gpu/nvgpu/include/nvgpu/os_fence.h
index a22140da..4713ed3e 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/os_fence.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/os_fence.h
@@ -60,6 +60,12 @@ struct nvgpu_os_fence_ops {
          * for the underlying sync_fence.
          */
         void (*drop_ref)(struct nvgpu_os_fence *s);
+
+        /*
+         * Used to install the fd in the corresponding OS. The underlying
+         * implementation varies from OS to OS.
+         */
+        void (*install_fence)(struct nvgpu_os_fence *s, int fd);
 };
 
 /*