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, 8 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/nvhost.c b/drivers/gpu/nvgpu/common/linux/nvhost.c
index 94bbfd70..a76953e3 100644
--- a/drivers/gpu/nvgpu/common/linux/nvhost.c
+++ b/drivers/gpu/nvgpu/common/linux/nvhost.c
@@ -138,6 +138,14 @@ u32 nvgpu_nvhost_get_syncpt_host_managed(
                         param, syncpt_name);
 }
 
+u32 nvgpu_nvhost_get_syncpt_client_managed(
+        struct nvgpu_nvhost_dev *nvhost_dev,
+        const char *syncpt_name)
+{
+        return nvhost_get_syncpt_client_managed(nvhost_dev->host1x_pdev,
+                        syncpt_name);
+}
+
 int nvgpu_nvhost_syncpt_wait_timeout_ext(
         struct nvgpu_nvhost_dev *nvhost_dev, u32 id,
         u32 thresh, u32 timeout, u32 *value, struct timespec *ts)