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, 5 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h
index 0bec9e82..b09fde65 100644
--- a/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/fifo_gk20a.h
@@ -47,6 +47,9 @@
 #define RC_TYPE_PBDMA_FAULT             2
 #define RC_TYPE_NO_RC                   0xff
 
+#define NVGPU_FIFO_DEFAULT_TIMESLICE_TIMEOUT    128UL
+#define NVGPU_FIFO_DEFAULT_TIMESLICE_SCALE      3UL
+
 /*
  * Number of entries in the kickoff latency buffer, used to calculate
  * the profiling and histogram. This number is calculated to be statistically
@@ -399,4 +402,6 @@ void gk20a_fifo_reset_pbdma_method(struct gk20a *g, int pbdma_id,
                          int pbdma_method_index);
 unsigned int gk20a_fifo_handle_pbdma_intr_0(struct gk20a *g, u32 pbdma_id,
                         u32 pbdma_intr_0, u32 *handled, u32 *error_notifier);
+
+u32 gk20a_fifo_default_timeslice_us(struct gk20a *g);
 #endif /*__GR_GK20A_H__*/