gpu: nvgpu: add deterministic submit flag

This change adds a new ioctl flag,
NVGPU_SUBMIT_GPFIFO_FLAGS_DETERMINISTIC, which indicates that a
gpfifo submission must exhibit deterministic behavior within the
kernel.

For submissions that require job tracking and also set
this flag, we require the channel to have previously
pre-allocated job tracking resources.

Bug 1795076

Change-Id: I0496a2513c6c683fcda161b32db9e7ee6712d45c
Signed-off-by: Sachit Kadle <skadle@nvidia.com>
Reviewed-on: http://git-master/r/1210527
(cherry picked from commit 0a36a0ce3a6cbe398931993e742fc928f7b2c0aa)
Reviewed-on: http://git-master/r/1223935
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index 22e357b6..f3c75045 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -994,6 +994,8 @@ struct nvgpu_fence {
 #define NVGPU_SUBMIT_GPFIFO_FLAGS_SUPPRESS_WFI  (1 << 4)
 /* skip buffer refcounting during submit */
 #define NVGPU_SUBMIT_GPFIFO_FLAGS_SKIP_BUFFER_REFCOUNTING       (1 << 5)
+/* submit should exhibit deterministic latency */
+#define NVGPU_SUBMIT_GPFIFO_FLAGS_DETERMINISTIC (1 << 6)
 
 struct nvgpu_submit_gpfifo_args {
         __u64 gpfifo;