gpu: nvgpu: add ioctls to get current timeslice

Add the following ioctls
- NVGPU_CHANNEL_IOCTL_GET_TIMESLICE for channel timeslice in us
- NVGPU_TSG_IOCTL_GET_TIMESLICE for TSG timeslice in us

If timeslice has not been set explicitly, ioctl returns the
default timeslice that will be used when programming the runlist
entry.

Bug 1883271

Change-Id: Ib18fdd836323b1a2d4efceb1e27d07713bd6fca5
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: http://git-master/r/1469040
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index 9e3bc05e..6cb77d67 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -146,6 +146,16 @@ int channel_gk20a_commit_va(struct channel_gk20a *c)
         return 0;
 }
 
+u32 gk20a_channel_get_timeslice(struct channel_gk20a *ch)
+{
+        struct gk20a *g = ch->g;
+
+        if (!ch->timeslice_us)
+                return g->ops.fifo.default_timeslice_us(g);
+
+        return ch->timeslice_us;
+}
+
 int gk20a_channel_get_timescale_from_timeslice(struct gk20a *g,
                 int timeslice_period,
                 int *__timeslice_timeout, int *__timeslice_scale)