gpu: nvgpu: legacy support with subcontext

gv11b needs atleast one subcontext to submit work. To support
legacy in gv11b, currently main context is always copied into
subcontext0 (veid0) during channel commit instance.

As part of channel commit instance, veid0 for that channel is
created and relevant pdb and context info copied to vedi0.

JIRA GV11B-21

Change-Id: I5147a1708b5e94202fa55e73fa0e53199ab7fced
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: http://git-master/r/1231169
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/subctx_gv11b.h b/drivers/gpu/nvgpu/gv11b/subctx_gv11b.h
new file mode 100644
index 00000000..357cd254
--- /dev/null
+++ b/drivers/gpu/nvgpu/gv11b/subctx_gv11b.h
@@ -0,0 +1,27 @@
+/*
+ *
+ * Volta GPU series Subcontext
+ *
+ * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.
+ */
+#ifndef __SUBCONTEXT_GV11B_H__
+#define __SUBCONTEXT_GV11B_H__
+
+int gv11b_alloc_subctx_header(struct channel_gk20a *c);
+
+void gv11b_free_subctx_header(struct channel_gk20a *c);
+
+int gv11b_update_subctx_header(struct channel_gk20a *c, u64 gpu_va);
+#endif /* __SUBCONTEXT_GV11B_H__ */