gpu: nvgpu: IOCTL to set TSG timeslice

Add new IOCTL NVGPU_IOCTL_TSG_SET_PRIORITY to allow
setting timeslice for entire TSG

Return error from channel specific IOCTL_CHANNEL_SET_PRIORITY
if the channel is part of TSG

Separate out API gk20a_channel_get_timescale_from_timeslice()
to get timeslice_timeout and scale from timeslice period

Use this API to get timeslice_timeout and scale for TSG and
store it in tsg_gk20a structure

Then trigger runlist update so that new timeslice values
will be re-written to runlist for TSG

Bug 200146615

Change-Id: I555467d034f81b372b31372f0835d72b1c159508
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/824206
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index f55346db..6024edee 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -377,11 +377,13 @@ struct nvgpu_gpu_vsms_mapping {
         _IO(NVGPU_TSG_IOCTL_MAGIC, 4)
 #define NVGPU_IOCTL_TSG_PREEMPT \
         _IO(NVGPU_TSG_IOCTL_MAGIC, 5)
+#define NVGPU_IOCTL_TSG_SET_PRIORITY \
+        _IOW(NVGPU_TSG_IOCTL_MAGIC, 6, struct nvgpu_set_priority_args)
 
 #define NVGPU_TSG_IOCTL_MAX_ARG_SIZE    \
-        sizeof(int)
+        sizeof(struct nvgpu_set_priority_args)
 #define NVGPU_TSG_IOCTL_LAST            \
-        _IOC_NR(NVGPU_IOCTL_TSG_PREEMPT)
+        _IOC_NR(NVGPU_IOCTL_TSG_SET_PRIORITY)
 /*
  * /dev/nvhost-dbg-gpu device
  *