/**
 * Author......: Jens Steube <jens.steube@gmail.com>
 * License.....: MIT
 */

#ifndef EXT_NVML_H
#define EXT_NVML_H

#if defined(HAVE_HWMON) && defined(HAVE_NVML)

#include <common.h>

/**
 * Declarations from nvml.h
 */

typedef struct nvmlDevice_st* nvmlDevice_t;

typedef struct nvmlPciInfo_st {
  char busId[16];
  unsigned int domain;
  unsigned int bus;
  unsigned int device;
  unsigned int pciDeviceId;
  unsigned int pciSubSystemId;
} nvmlPciInfo_t;

typedef struct nvmlUtilization_st {
  unsigned int gpu;    // GPU kernel execution last second, percent
  unsigned int memory; // GPU memory read/write last second, percent
} nvmlUtilization_t;

typedef enum nvmlTemperatureSensors_enum {
  NVML_TEMPERATURE_GPU = 0     // Temperature sensor for the GPU die
} nvmlTemperatureSensors_t;

typedef enum nvmlReturn_enum {
  NVML_SUCCESS = 0,                   // The operation was successful
  NVML_ERROR_UNINITIALIZED = 1,       // NVML was not first initialized with nvmlInit()
  NVML_ERROR_INVALID_ARGUMENT = 2,    // A supplied argument is invalid
  NVML_ERROR_NOT_SUPPORTED = 3,       // The requested operation is not available on target device
  NVML_ERROR_NO_PERMISSION = 4,       // The current user does not have permission for operation
  NVML_ERROR_ALREADY_INITIALIZED = 5, // Deprecated: Multiple initializations are now allowed through ref counting
  NVML_ERROR_NOT_FOUND = 6,           // A query to find an object was unsuccessful
  NVML_ERROR_INSUFFICIENT_SIZE = 7,   // An input argument is not large enough
  NVML_ERROR_INSUFFICIENT_POWER = 8,  // A device's external power cables are not properly attached
  NVML_ERROR_DRIVER_NOT_LOADED = 9,   // NVIDIA driver is not loaded
  NVML_ERROR_TIMEOUT = 10,            // User provided timeout passed
  NVML_ERROR_UNKNOWN = 999            // An internal driver error occurred
} nvmlReturn_t;

/*
 * End of declarations from nvml.h
 **/

typedef nvmlDevice_t HM_ADAPTER_NV;

typedef const char * (*NVML_ERROR_STRING) (nvmlReturn_t);
typedef int (*NVML_INIT) ();
typedef int (*NVML_SHUTDOWN) ();
typedef nvmlReturn_t (*NVML_DEVICE_GET_NAME) (nvmlDevice_t, char *, unsigned int);
typedef nvmlReturn_t (*NVML_DEVICE_GET_HANDLE_BY_INDEX) (unsigned int, nvmlDevice_t *);
typedef nvmlReturn_t (*NVML_DEVICE_GET_TEMPERATURE) (nvmlDevice_t, nvmlTemperatureSensors_t, unsigned int *);
typedef nvmlReturn_t (*NVML_DEVICE_GET_FAN_SPEED) (nvmlDevice_t, unsigned int *);
typedef nvmlReturn_t (*NVML_DEVICE_GET_POWER_USAGE) (nvmlDevice_t, unsigned int *);
typedef nvmlReturn_t (*NVML_DEVICE_GET_UTILIZATION_RATES) (nvmlDevice_t, nvmlUtilization_t *);

nvmlReturn_t hc_NVML_nvmlInit (HM_LIB hDLL);
nvmlReturn_t hc_NVML_nvmlShutdown (HM_LIB hDLL);
nvmlReturn_t hc_NVML_nvmlDeviceGetName (HM_LIB hDLL, nvmlDevice_t device, char *name, unsigned int length);
nvmlReturn_t hc_NVML_nvmlDeviceGetHandleByIndex (HM_LIB hDLL, int, unsigned int index, nvmlDevice_t *device);
nvmlReturn_t hc_NVML_nvmlDeviceGetTemperature (HM_LIB hDLL, nvmlDevice_t device, nvmlTemperatureSensors_t sensorType, unsigned int *temp);
nvmlReturn_t hc_NVML_nvmlDeviceGetFanSpeed (HM_LIB hDLL, int, nvmlDevice_t device, unsigned int *speed);
nvmlReturn_t hc_NVML_nvmlDeviceGetPowerUsage (HM_LIB hDLL, nvmlDevice_t device, unsigned int *power);
nvmlReturn_t hc_NVML_nvmlDeviceGetUtilizationRates (HM_LIB hDLL, nvmlDevice_t device, nvmlUtilization_t *utilization);

#endif // HAVE_HWMON && HAVE_NVML

#endif