From 52753b51f1dbf51221d7856a9288aad1ab2d351a Mon Sep 17 00:00:00 2001 From: Deepak Nibade Date: Wed, 7 Oct 2015 16:20:07 +0530 Subject: gpu: nvgpu: create sync_fence only if needed Currently, we create sync_fence (from nvhost_sync_create_fence()) for every submit But not all submits request for a sync_fence. Also, nvhost_sync_create_fence() API takes about 1/3rd of the total submit path. Hence to optimize, we can allocate sync_fence only when user explicitly asks for it using (NVGPU_SUBMIT_GPFIFO_FLAGS_FENCE_GET && NVGPU_SUBMIT_GPFIFO_FLAGS_SYNC_FENCE) Also, in CDE path from gk20a_prepare_compressible_read(), we reuse existing fence stored in "state" and that can result into not returning sync_fence_fd when user asked for it Hence, force allocation of sync_fence when job submission comes from CDE path Bug 200141116 Change-Id: Ia921701bf0e2432d6b8a5e8b7d91160e7f52db1e Signed-off-by: Deepak Nibade Reviewed-on: http://git-master/r/812845 (cherry picked from commit 5fd47015eeed00352cc8473eff969a66c94fee98) Reviewed-on: http://git-master/r/837662 Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit Reviewed-by: Sachin Nikam --- drivers/gpu/nvgpu/gk20a/channel_gk20a.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/nvgpu/gk20a/channel_gk20a.h') diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h index 55528dd9..d3428788 100644 --- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h +++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h @@ -244,7 +244,8 @@ int gk20a_submit_channel_gpfifo(struct channel_gk20a *c, u32 num_entries, u32 flags, struct nvgpu_fence *fence, - struct gk20a_fence **fence_out); + struct gk20a_fence **fence_out, + bool force_need_sync_fence); int gk20a_alloc_channel_gpfifo(struct channel_gk20a *c, struct nvgpu_alloc_gpfifo_args *args); -- cgit v1.2.2