gpu: nvgpu: Replace kref for refcounting in nvgpu

- added wrapper struct nvgpu_ref over nvgpu_atomic_t
- added nvgpu_ref_* APIs to access the above struct

JIRA NVGPU-140

Change-Id: Id47f897995dd4721751f7610b6d4d4fbfe4d6b9a
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1540899
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
index 99d72292..f3e87a13 100644
--- a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
@@ -104,7 +104,7 @@ int gk20a_tsg_bind_channel(struct tsg_gk20a *tsg,
         nvgpu_list_add_tail(&ch->ch_entry, &tsg->ch_list);
         up_write(&tsg->ch_list_lock);
 
-        kref_get(&tsg->refcount);
+        nvgpu_ref_get(&tsg->refcount);
 
         gk20a_dbg(gpu_dbg_fn, "BIND tsg:%d channel:%d\n",
                                         tsg->tsgid, ch->chid);
@@ -122,7 +122,7 @@ int gk20a_tsg_unbind_channel(struct channel_gk20a *ch)
         nvgpu_list_del(&ch->ch_entry);
         up_write(&tsg->ch_list_lock);
 
-        kref_put(&tsg->refcount, gk20a_tsg_release);
+        nvgpu_ref_put(&tsg->refcount, gk20a_tsg_release);
 
         ch->tsgid = NVGPU_INVALID_TSG_ID;
 
@@ -257,7 +257,7 @@ struct tsg_gk20a *gk20a_tsg_open(struct gk20a *g)
 
         tsg->g = g;
         tsg->num_active_channels = 0;
-        kref_init(&tsg->refcount);
+        nvgpu_ref_init(&tsg->refcount);
 
         tsg->tsg_gr_ctx = NULL;
         tsg->vm = NULL;
@@ -287,11 +287,11 @@ struct tsg_gk20a *gk20a_tsg_open(struct gk20a *g)
         return tsg;
 
 clean_up:
-        kref_put(&tsg->refcount, gk20a_tsg_release);
+        nvgpu_ref_put(&tsg->refcount, gk20a_tsg_release);
         return NULL;
 }
 
-void gk20a_tsg_release(struct kref *ref)
+void gk20a_tsg_release(struct nvgpu_ref *ref)
 {
         struct tsg_gk20a *tsg = container_of(ref, struct tsg_gk20a, refcount);
         struct gk20a *g = tsg->g;