gpu: nvgpu: vgpu: add devfreq support

Add devfreq governor support in order to allow frequency scaling
in virtualization config. GPU clock frequency operations are
re-directed to the server over RPC.

Bug 200237433

Change-Id: I1c8e565a4fff36d3456dc72ebb20795b7822650e
Signed-off-by: Sachit Kadle <skadle@nvidia.com>
Reviewed-on: http://git-master/r/1295542
(cherry picked from commit d5c956fc06697eda3829c67cb22987e538213b29)
Reviewed-on: http://git-master/r/1280968
(cherry picked from commit 25e2b3cf7cb5559a6849c0024d42c157564a9be2)
Reviewed-on: http://git-master/r/1321835
(cherry picked from commit f871b52fd3f553d6b6375a3c848fbca272ed8e29)
Reviewed-on: http://git-master/r/1313468
Tested-by: Aparna Das <aparnad@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: Richard Zhao <rizhao@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/tegra_vgpu.h b/include/linux/tegra_vgpu.h
index 67f51806..4d1e1ac9 100644
--- a/include/linux/tegra_vgpu.h
+++ b/include/linux/tegra_vgpu.h
@@ -100,6 +100,8 @@ enum {
         TEGRA_VGPU_CMD_SUSPEND_CONTEXTS = 66,
         TEGRA_VGPU_CMD_RESUME_CONTEXTS = 67,
         TEGRA_VGPU_CMD_CLEAR_SM_ERROR_STATE = 68,
+        TEGRA_VGPU_CMD_GET_GPU_CLK_RATE = 69,
+        TEGRA_VGPU_CMD_GET_GPU_FREQ_TABLE = 70,
         TEGRA_VGPU_CMD_PROF_MGT = 72,
         TEGRA_VGPU_CMD_GET_TIMESTAMPS_ZIPPER = 74,
 };
@@ -485,6 +487,13 @@ struct tegra_vgpu_prof_mgt_params {
         u32 mode;
 };
 
+#define TEGRA_VGPU_GPU_FREQ_TABLE_SIZE          25
+
+struct tegra_vgpu_get_gpu_freq_table_params {
+        u32 num_freqs;
+        u32 freqs[TEGRA_VGPU_GPU_FREQ_TABLE_SIZE]; /* in kHz */
+};
+
 struct tegra_vgpu_cmd_msg {
         u32 cmd;
         int ret;
@@ -536,6 +545,7 @@ struct tegra_vgpu_cmd_msg {
                 struct tegra_vgpu_clear_sm_error_state clear_sm_error_state;
                 struct tegra_vgpu_prof_mgt_params prof_management;
                 struct tegra_vgpu_get_timestamps_zipper_params get_timestamps_zipper;
+                struct tegra_vgpu_get_gpu_freq_table_params get_gpu_freq_table;
                 char padding[192];
         } params;
 };