gpu: nvgpu: allocate separate client managed syncpoint for User

We right now allocate a nvgpu managed syncpoint in c->sync and share
that with user space

But to avoid conflicts between user space and kernel space increments
allocate a separate "client managed" syncpoint for User space in c->user_sync

Add new API nvgpu_nvhost_get_syncpt_client_managed() to request a client managed
syncpoint from nvhost.
Note that nvhost/nvgpu do not keep track of MAX/threshold value of this syncpoint

Update gk20a_channel_syncpt_create() to receive a flag to indicate whether a
User space syncpoint is required or not

Unset NVGPU_SUPPORT_USER_SYNCPOINT for gp10b since we don't want to allocate
double syncpoints per channel on that platform

For gv11b, once we move to use user space submits, support for c->sync will be
dropped so we keep using only one syncpoint per channel

Bug 200326065
Jira NVGPU-179

Change-Id: I78d94de4276db1c897ea2a4fe4c2db8b2a179722
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1665828
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
index db1404a3..edb645b5 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
@@ -226,6 +226,7 @@ struct channel_gk20a {
 
         struct nvgpu_mutex sync_lock;
         struct gk20a_channel_sync *sync;
+        struct gk20a_channel_sync *user_sync;
 
 #ifdef CONFIG_TEGRA_GR_VIRTUALIZATION
         u64 virt_ctx;