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, 9 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gr_gk20a.h b/drivers/gpu/nvgpu/gk20a/gr_gk20a.h
index 10997c17..15d1ea7d 100644
--- a/drivers/gpu/nvgpu/gk20a/gr_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gr_gk20a.h
@@ -188,6 +188,14 @@ struct gr_gk20a_isr_data {
         u32 class_num;
 };
 
+struct nvgpu_preemption_modes_rec {
+        u32 graphics_preemption_mode_flags; /* supported preemption modes */
+        u32 compute_preemption_mode_flags; /* supported preemption modes */
+
+        u32 default_graphics_preempt_mode; /* default mode */
+        u32 default_compute_preempt_mode; /* default mode */
+};
+
 struct gr_gk20a {
         struct gk20a *g;
         struct {
@@ -325,6 +333,7 @@ struct gr_gk20a {
         bool sw_ready;
         bool skip_ucode_init;
 
+        struct nvgpu_preemption_modes_rec preemption_mode_rec;
 #ifdef CONFIG_ARCH_TEGRA_18x_SOC
         struct gr_t18x t18x;
 #endif