gpu: nvgpu: add tsg_open HAL interface

Add HAL interface for TSG open, which is intended to
be called from the exisiting gk20a_tsg_open function.

The tsg_open entryoint is only implemented for vgpu,
as the server needs to clear metadata when a tsg is opened.

Bug 200215060

Change-Id: Icc8fd602f31e52d9fa9b2e7786b665b9e7b9294e
Signed-off-by: Sachit Kadle <skadle@nvidia.com>
Reviewed-on: http://git-master/r/1249218
(cherry picked from commit 35c86f7c796c6574d3dc336e20012ea5c16d7cb4)
Reviewed-on: http://git-master/r/1256468
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
index 43ee79cd..fc36c0c7 100644
--- a/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/tsg_gk20a.c
@@ -402,6 +402,7 @@ int gk20a_tsg_open(struct gk20a *g, struct file *filp)
 {
         struct tsg_gk20a *tsg;
         struct device *dev;
+        int err;
 
         dev  = dev_from_gk20a(g);
 
@@ -426,11 +427,24 @@ int gk20a_tsg_open(struct gk20a *g, struct file *filp)
 
         filp->private_data = tsg;
 
+        if (g->ops.fifo.tsg_open) {
+                err = g->ops.fifo.tsg_open(tsg);
+                if (err) {
+                        gk20a_err(dev, "tsg %d fifo open failed %d",
+                                tsg->tsgid, err);
+                        goto clean_up;
+                }
+        }
+
         gk20a_dbg(gpu_dbg_fn, "tsg opened %d\n", tsg->tsgid);
 
         gk20a_sched_ctrl_tsg_added(g, tsg);
 
         return 0;
+
+clean_up:
+        kref_put(&tsg->refcount, gk20a_tsg_release);
+        return err;
 }
 
 int gk20a_tsg_dev_open(struct inode *inode, struct file *filp)