gpu: nvgpu: get voltage, current, power and temperature

Add ioctls to retrieve voltage, current, power and temperature.
Add flags in GPU characteristics to indicate if feature is supported.

Jira DNVGPU-166

Change-Id: Ifaafe2efdb6b09d7b28215b641814f28e894151e
Signed-off-by: David Martinez Nieto <dmartineznie@nvidia.com>
Reviewed-on: http://git-master/r/1241861
Tested-by: Thomas Fleury <tfleury@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-on: http://git-master/r/1267122

1 files changed, 17 insertions, 4 deletions

diff --git a/drivers/gpu/nvgpu/gp106/therm_gp106.c b/drivers/gpu/nvgpu/gp106/therm_gp106.c
index a3aa3636..15aff89c 100644
--- a/drivers/gpu/nvgpu/gp106/therm_gp106.c
+++ b/drivers/gpu/nvgpu/gp106/therm_gp106.c
@@ -15,10 +15,8 @@
 #include <linux/debugfs.h>
 #include "hw_therm_gp106.h"
 
-#ifdef CONFIG_DEBUG_FS
-static int therm_get_internal_sensor_curr_temp(void *data, u64 *val)
+static int gp106_get_internal_sensor_curr_temp(struct gk20a *g, u32 *temp_f24_8)
 {
-        struct gk20a *g = (struct gk20a *)data;
         int err = 0;
         u32 readval;
 
@@ -38,7 +36,21 @@ static int therm_get_internal_sensor_curr_temp(void *data, u64 *val)
         // Convert from F9.5 -> F27.5 -> F24.8.
         readval &= therm_temp_sensor_tsense_fixed_point_m();
 
-        *val = readval;
+        *temp_f24_8 = readval;
+
+        return err;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static int therm_get_internal_sensor_curr_temp(void *data, u64 *val)
+{
+        struct gk20a *g = (struct gk20a *)data;
+        u32 readval;
+        int err;
+
+        err = gp106_get_internal_sensor_curr_temp(g, &readval);
+        if (!err)
+                *val = readval;
 
         return err;
 }
@@ -104,4 +116,5 @@ void gp106_init_therm_ops(struct gpu_ops *gops) {
         gops->therm.therm_debugfs_init = gp106_therm_debugfs_init;
 #endif
         gops->therm.elcg_init_idle_filters = gp106_elcg_init_idle_filters;
+        gops->therm.get_internal_sensor_curr_temp = gp106_get_internal_sensor_curr_temp;
 }