gpu: nvgpu: add NVGPU_SUBMIT_GPFIFO_FLAGS_RESCHEDULE_RUNLIST

NVGPU_SUBMIT_GPFIFO_FLAGS_RESCHEDULE_RUNLIST causes host to expire
current timeslice and reschedule from front of runlist.
This can be used with NVGPU_RUNLIST_INTERLEAVE_LEVEL_HIGH to make a
channel start sooner after submit rather than waiting for natural
timeslice expiration or block/finish of currently running channel.

Bug 1968813

Change-Id: I632e87c5f583a09ec8bf521dc73f595150abebb0
Signed-off-by: David Li <davli@nvidia.com>
Reviewed-on: http://git-master/r/#/c/1537198
Reviewed-on: https://git-master.nvidia.com/r/1537198
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index 6c113764..5b1d606a 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -144,6 +144,8 @@ struct nvgpu_gpu_zbc_query_table_args {
 #define NVGPU_GPU_FLAGS_SUPPORT_DETERMINISTIC_SUBMIT_FULL (1ULL << 19)
 /* IO coherence support is available */
 #define NVGPU_GPU_FLAGS_SUPPORT_IO_COHERENCE            (1ULL << 20)
+/* NVGPU_SUBMIT_GPFIFO_FLAGS_RESCHEDULE_RUNLIST is available */
+#define NVGPU_GPU_FLAGS_SUPPORT_RESCHEDULE_RUNLIST      (1ULL << 21)
 
 struct nvgpu_gpu_characteristics {
         __u32 arch;
@@ -1404,6 +1406,8 @@ 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)
+/* expire current timeslice and reschedule runlist from front */
+#define NVGPU_SUBMIT_GPFIFO_FLAGS_RESCHEDULE_RUNLIST    (1 << 6)
 
 struct nvgpu_submit_gpfifo_args {
         __u64 gpfifo;