gpu: nvgpu: add supported preemptions to gpu characteristics

Add below flag fields to gpu characteristics to indicate
supported and default preemption modes on platform for
graphics and compute

__u32 graphics_preemption_mode_flags;
__u32 compute_preemption_mode_flags;
__u32 default_graphics_preempt_mode;
__u32 default_compute_preempt_mode;

Add struct nvgpu_preemption_modes_rec to struct gr_gk20a
to store these values locally

Use platform specific get_preemption_mode_flags() to
get the flags and define gk20a/gm20b specific
get_preemption_mode_flags() API

Bug 1646259

Change-Id: I80193c0d988dc93bd96585f9aa631fd817f4dfa3
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1133595
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 4283e1ad..c07e7e4b 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -2142,6 +2142,17 @@ int gk20a_init_gpu_characteristics(struct gk20a *g)
         if (platform->clk_round_rate)
                 gpu->max_freq = platform->clk_round_rate(g->dev, UINT_MAX);
 
+        g->ops.gr.get_preemption_mode_flags(g, &g->gr.preemption_mode_rec);
+        gpu->graphics_preemption_mode_flags =
+                g->gr.preemption_mode_rec.graphics_preemption_mode_flags;
+        gpu->compute_preemption_mode_flags =
+                g->gr.preemption_mode_rec.compute_preemption_mode_flags;
+        gpu->default_graphics_preempt_mode =
+                g->gr.preemption_mode_rec.default_graphics_preempt_mode;
+        gpu->default_compute_preempt_mode =
+                g->gr.preemption_mode_rec.default_compute_preempt_mode;
+
+
         return 0;
 }