gpu: nvgpu: gv11b: support for full subcontext

Changes to enable 64 subcontexts: 1 SYNC + 63 ASYNC
Currently all subcontexts with in a tsg can have only
single address space.

Add support for NVGPU_TSG_IOCTL_BIND_CHANNEL_EX for
selecting subctx id by client.

Bug 1842197

Change-Id: Icf56a41303bd1ad7fc6f2a6fbc691bb7b4a01d22
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: https://git-master/r/1511145
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 21 insertions, 1 deletions

diff --git a/include/uapi/linux/nvgpu-t19x.h b/include/uapi/linux/nvgpu-t19x.h
index 6a10fb77..96514a88 100644
--- a/include/uapi/linux/nvgpu-t19x.h
+++ b/include/uapi/linux/nvgpu-t19x.h
@@ -1,7 +1,7 @@
 /*
  * NVGPU Public Interface Header
  *
- * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2016-2017, 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,
@@ -27,4 +27,24 @@
 #define NVGPU_GPU_ARCH_GV110 0x00000150
 #define NVGPU_GPU_IMPL_GV11B 0x0000000B
 
+/*  subcontexts are available */
+#define NVGPU_GPU_FLAGS_SUPPORT_TSG_SUBCONTEXTS         (1ULL << 22)
+
+struct nvgpu_tsg_bind_channel_ex_args {
+        /* in: channel fd */
+        __s32 channel_fd;
+
+        /* in: VEID in Volta */
+        __u32 subcontext_id;
+
+        __u64 reserved[2];
+};
+
+#define NVGPU_TSG_IOCTL_BIND_CHANNEL_EX \
+        _IOWR(NVGPU_TSG_IOCTL_MAGIC, 11, struct nvgpu_tsg_bind_channel_ex_args)
+
+#define NVGPU_TSG_IOCTL_MAX NVGPU_TSG_IOCTL_BIND_CHANNEL_EX
+
+#define NVGPU_TSG_IOCTL_MAX_ARG sizeof(struct nvgpu_tsg_bind_channel_ex_args)
+
 #endif /* _UAPI__LINUX_NVGPU_T19X_IOCTL_H_ */