Added support for some NVML sensors.

GPU temp sensor and clock reasons.

Makefile

@@ -4,13 +4,20 @@ OBJS = evga-icx.o evga-card.o icx3.o
 LDLIBS = -li2c
 CFLAGS = -MD
 
+ifdef USE_NVML
+LDLIBS += -lnvidia-ml
+CFLAGS += -DUSE_NVML
+OBJS += nvidia-sensors.o
+endif
+
 evga-icx : $(OBJS)
 
 debug : CFLAGS += -g -O0
 debug : evga-icx
 
 clean :
-	rm evga-icx $(OBJS)
+	rm evga-icx
+	rm *.o
 	rm *.d
 	
 -include $(OBJS:.o=.d)

README.md

@@ -24,6 +24,11 @@ Access to the `/dev/i2c` device files, which means either:
 ## Building
 `make`
 
+## Optional features
+
+### NVML support
+Add the make flag `USE_NVML=1` and the it will also display the main GPU temperature ("GPU1") as reported by the NVIDIA driver.  It will also display the performance cap/clock reason.
+
 ## Usage
 Note that when controlling fans directly through iCX3 they will fall offline from the Nvidia driver and show as 0 RPM until you return them to automatic mode.
 

evga-icx.c

@@ -5,6 +5,10 @@
 #include <fcntl.h>
 #include <stdlib.h>
 
+#ifdef USE_NVML
+#include "nvidia-sensors.h"
+#endif
+
 #include "icx3.h"
 #include "evga-card.h"
 
@@ -32,7 +36,7 @@ int main (int argc, char **argv)
 	int print_info = 0;
 	int compact = 0;
 	int gpu_num = -1;    /* Card to control */
-	int watch = -1;
+	unsigned int watch = 0;
 	char *fan_speed[ICX3_MAX_FANS] = {NULL}; 
 	
 	/* Input parsing */
@@ -125,33 +129,57 @@ int main (int argc, char **argv)
 		}
 	}
 	
+	/* NVML init */
+#ifdef USE_NVML
+	int nvml_ok = init_nvml();
+	nvmlDevice_t* device[MAX_GPUS];
+#endif
+	
 	/* print sensor info */
-print:
 	if (print_info) {
-		if (gpu_num == -1) {
-			for (int i = 0; i < gpu_count; i++){
-				print_gpu_info(i, gpus, compact);
-			}		
-		} else if (gpu_num <= gpu_count - 1) {
-			print_gpu_info(gpu_num, gpus, compact);
-		}
-	}
-	if (watch > 0) {
-		sleep(watch);
-		goto print;
+		do {
+			if (gpu_num == -1) {
+				for (int i = 0; i < gpu_count; i++){
+					print_gpu_info(i, &gpus[i], compact);
+				}		
+			} else if (gpu_num <= gpu_count - 1) {
+				print_gpu_info(gpu_num, &gpus[gpu_num], compact);
+			}
+			sleep(watch);
+		} while (watch > 0);
 	}
+	
+#ifdef USE_NVML
+	nvmlShutdown();
+#endif
 }
 
-void print_gpu_info(int gpu_num, struct card_info gpus[], int compact) {
+void print_gpu_info(int gpu_num, struct card_info *gpu, int compact) {
 	if (compact) {
+		/* One line per GPU */
 		printf("#%d ", gpu_num);
-		print_icx3_fans_oneline(&gpus[gpu_num]);
-		print_icx3_temps_oneline(&gpus[gpu_num]);
+		print_icx3_fans_oneline(gpu);
+		printf(" GPU");
+#ifdef USE_NVML
+		print_nvml_temp(1, gpu);
+#endif
+		print_icx3_temps_oneline(gpu);
+		printf("°C");
+#ifdef USE_NVML
+		print_nvml_clock_reason(1, gpu);
+#endif
 		printf("\n");
 	} else {
-		printf("#%d: %s (%s) @ %s\n", gpu_num, gpus[gpu_num].card_name, gpus[gpu_num].i2c_dev_path, gpus[gpu_num].pci_id);
-		print_icx3_fans(&gpus[gpu_num]);
-		print_icx3_temps(&gpus[gpu_num]);
+		/* One line per GPU sensor */
+		printf("#%d: %s (%s) @ %s\n", gpu_num, gpu->card_name, gpu->i2c_dev_path, gpu->pci_id);
+		print_icx3_fans(gpu);
+#ifdef USE_NVML
+		print_nvml_temp(0, gpu);
+#endif
+		print_icx3_temps(gpu);
+#ifdef USE_NVML
+		print_nvml_clock_reason(0, gpu);
+#endif
 		printf("\n");
 	}
 	

icx3.c

@@ -89,11 +89,11 @@ void print_icx3_temps_oneline(struct card_info *card)
 	get_temp_sensors(temps, card);
 	
 	for (int i=0; i<ICX3_NUM_TEMP_SENSORS; i++) {
-		if (i == 0 || strncmp(icx3_temp_sensor_names[i], icx3_temp_sensor_names[i-1], 3))
+		/* If this math seems a little jank, it's so we can optionally inject the NVML and vram temps into the oneline */
+		if (i > 0 && strncmp(icx3_temp_sensor_names[i], icx3_temp_sensor_names[i-1], 3))
 			printf(" %.3s", icx3_temp_sensor_names[i]);
 		printf(" %3.0f", temps[i]);
 	}
-	printf("°C");
 }
 
 void get_available_fans(char *fans_avail, struct card_info *card)

nvidia-sensors.c

@@ -0,0 +1,95 @@
+#include <stdio.h>
+
+#include "nvidia-sensors.h"
+
+int init_nvml()
+{
+	nvmlReturn_t result;
+	result = nvmlInit_v2();
+	if (result != NVML_SUCCESS) {
+		printf("Could not init NVML: %s\n", nvmlErrorString(result));
+		return 0;
+	}
+}
+
+void print_nvml_temp(int compact, struct card_info *card)
+{
+	if (compact)
+		printf(" %3d", get_nvml_temp(card));
+	else
+		printf("GPU1: %+d°C\n", get_nvml_temp(card));
+}
+
+void print_nvml_clock_reason(int compact, struct card_info *card)
+{
+	unsigned long long reasons = get_nvml_clock_reasons(card);
+	int single_reason = 1;
+	
+	if (compact)
+		printf(" CLK ");
+	else
+		printf("Clock reasons: ");
+	
+	for (int i = 0; i < (sizeof(clock_reason_names) / sizeof(struct clock_reason)); i++) {
+		if (reasons & clock_reason_names[i].mask) {
+			if (!single_reason) {
+				if (compact)
+					printf(",");
+				else
+					printf(", ");
+			}	
+			single_reason = 0;
+			
+			if (compact)
+				printf("%s", clock_reason_names[i].short_name);
+			else
+				printf("%s", clock_reason_names[i].long_name);
+		}
+	}
+	
+	if (single_reason)
+		printf("None");
+	
+	if (!compact)
+		printf(" (0x%llx)\n", reasons);
+}
+
+unsigned int get_nvml_temp(struct card_info *card)
+{
+	nvmlReturn_t result;
+	nvmlDevice_t nvml_device;
+	result = nvmlDeviceGetHandleByPciBusId_v2(card->pci_id, &nvml_device);
+	if (result != NVML_SUCCESS) {
+		printf("Failed to get device handle for card at %s: %s\n", card->pci_id, nvmlErrorString(result));
+		return 0;
+	}
+	
+	unsigned int temp;
+	result = nvmlDeviceGetTemperature(nvml_device, NVML_TEMPERATURE_GPU, &temp); 
+	if (result != NVML_SUCCESS) {
+		printf("Failed to get temperature for card at %s: %s\n", card->pci_id, nvmlErrorString(result));
+		return 0;
+	}
+	return temp;
+}
+
+unsigned long long get_nvml_clock_reasons(struct card_info *card)
+{
+	nvmlReturn_t result;
+	nvmlDevice_t nvml_device;
+	result = nvmlDeviceGetHandleByPciBusId_v2(card->pci_id, &nvml_device);
+	if (result != NVML_SUCCESS) {
+		printf("Failed to get device handle for card at %s: %s\n", card->pci_id, nvmlErrorString(result));
+		return 0;
+	}
+	
+	unsigned long long reasons;
+	result = nvmlDeviceGetCurrentClocksEventReasons(nvml_device, &reasons) ; 
+	if (result != NVML_SUCCESS) {
+		printf("Failed to get clock reasons for card at %s: %s\n", card->pci_id, nvmlErrorString(result));
+		return 0;
+	}
+	
+	return reasons;
+}
+

nvidia-sensors.h

@@ -0,0 +1,28 @@
+#include <nvml.h>
+
+#include "evga-card.h"
+
+struct clock_reason {
+	unsigned long long mask;
+	char *short_name;
+	char *long_name;
+};
+
+static struct clock_reason clock_reason_names[] = 
+{
+	{nvmlClocksEventReasonGpuIdle,						"Idle", 	"GPU idle"},
+	{nvmlClocksEventReasonApplicationsClocksSetting,	"AppClk",	"Application clocks"},
+	{nvmlClocksEventReasonSwPowerCap,					"Pwr",		"Power cap"},
+	{nvmlClocksThrottleReasonHwSlowdown,				"HWSlow",	"Hardware slowdown"},
+	{nvmlClocksEventReasonSyncBoost,					"Sync",		"Sync boost"},
+	{nvmlClocksEventReasonSwThermalSlowdown,			"SWTherm",	"Software thermal"},
+	{nvmlClocksThrottleReasonHwThermalSlowdown,			"HWTherm",	"Hardware thermal"},
+	{nvmlClocksThrottleReasonHwPowerBrakeSlowdown,		"HWPower",	"Hardware power brake"},
+	{nvmlClocksEventReasonDisplayClockSetting,			"DispClk",	"Display clock"}
+};
+
+int init_nvml();
+void print_nvml_temp(int compact, struct card_info *card);
+void print_nvml_clock_reason(int compact, struct card_info *card);
+unsigned int get_nvml_temp(struct card_info *card);
+unsigned long long get_nvml_clock_reasons(struct card_info *card);