gcc/include/cuda/cuda.h

/* CUDA Driver API description.
   Copyright (C) 2017-2026 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.

This header provides parts of the CUDA Driver API, without having to rely on
the proprietary CUDA toolkit.  */

#ifndef GCC_CUDA_H
#define GCC_CUDA_H

#include <stdlib.h>

#define CUDA_VERSION 8000

#ifdef __cplusplus
extern "C" {
#endif

typedef void *CUcontext;
typedef int CUdevice;
#if defined(__LP64__) || defined(_WIN64)
typedef unsigned long long CUdeviceptr;
#else
typedef unsigned CUdeviceptr;
#endif
typedef void *CUevent;
typedef void *CUfunction;
typedef void *CUlinkState;
typedef void *CUmodule;
typedef void *CUarray;
typedef size_t (*CUoccupancyB2DSize)(int);
typedef void *CUstream;

typedef enum {
  CUDA_SUCCESS = 0,
  CUDA_ERROR_INVALID_VALUE = 1,
  CUDA_ERROR_OUT_OF_MEMORY = 2,
  CUDA_ERROR_NOT_INITIALIZED = 3,
  CUDA_ERROR_DEINITIALIZED = 4,
  CUDA_ERROR_NO_DEVICE = 100,
  CUDA_ERROR_INVALID_CONTEXT = 201,
  CUDA_ERROR_INVALID_HANDLE = 400,
  CUDA_ERROR_NOT_FOUND = 500,
  CUDA_ERROR_NOT_READY = 600,
  CUDA_ERROR_LAUNCH_FAILED = 719,
  CUDA_ERROR_COOPERATIVE_LAUNCH_TOO_LARGE = 720,
  CUDA_ERROR_NOT_PERMITTED = 800,
  CUDA_ERROR_NOT_SUPPORTED = 801,
  CUDA_ERROR_UNKNOWN = 999
} CUresult;

typedef enum {
  CU_DEVICE_ATTRIBUTE_MAX_THREADS_PER_BLOCK = 1,
  CU_DEVICE_ATTRIBUTE_WARP_SIZE = 10,
  CU_DEVICE_ATTRIBUTE_MAX_REGISTERS_PER_BLOCK = 12,
  CU_DEVICE_ATTRIBUTE_CLOCK_RATE = 13,
  CU_DEVICE_ATTRIBUTE_GPU_OVERLAP = 15,
  CU_DEVICE_ATTRIBUTE_MULTIPROCESSOR_COUNT = 16,
  CU_DEVICE_ATTRIBUTE_INTEGRATED = 18,
  CU_DEVICE_ATTRIBUTE_CAN_MAP_HOST_MEMORY = 19,
  CU_DEVICE_ATTRIBUTE_COMPUTE_MODE = 20,
  CU_DEVICE_ATTRIBUTE_CONCURRENT_KERNELS = 31,
  CU_DEVICE_ATTRIBUTE_MAX_THREADS_PER_MULTIPROCESSOR = 39,
  CU_DEVICE_ATTRIBUTE_ASYNC_ENGINE_COUNT = 40,
  CU_DEVICE_ATTRIBUTE_UNIFIED_ADDRESSING = 41,
  CU_DEVICE_ATTRIBUTE_MAX_REGISTERS_PER_MULTIPROCESSOR = 82,
  CU_DEVICE_ATTRIBUTE_PAGEABLE_MEMORY_ACCESS = 88
} CUdevice_attribute;

typedef enum {
  CU_MEM_ATTACH_GLOBAL = 0x1
} CUmemAttach_flags;

enum {
  CU_EVENT_DEFAULT = 0,
  CU_EVENT_DISABLE_TIMING = 2
};

typedef enum {
  CU_FUNC_ATTRIBUTE_MAX_THREADS_PER_BLOCK = 0,
  CU_FUNC_ATTRIBUTE_NUM_REGS = 4
} CUfunction_attribute;

typedef enum {
  CU_JIT_WALL_TIME = 2,
  CU_JIT_INFO_LOG_BUFFER = 3,
  CU_JIT_INFO_LOG_BUFFER_SIZE_BYTES = 4,
  CU_JIT_ERROR_LOG_BUFFER = 5,
  CU_JIT_ERROR_LOG_BUFFER_SIZE_BYTES = 6,
  CU_JIT_OPTIMIZATION_LEVEL = 7,
  CU_JIT_GENERATE_DEBUG_INFO = 11,
  CU_JIT_LOG_VERBOSE = 12,
  CU_JIT_GENERATE_LINE_INFO = 13,
} CUjit_option;

typedef enum {
  CU_JIT_INPUT_PTX = 1
} CUjitInputType;

enum {
  CU_CTX_SCHED_AUTO = 0
};

#define CU_LAUNCH_PARAM_END ((void *) 0)
#define CU_LAUNCH_PARAM_BUFFER_POINTER ((void *) 1)
#define CU_LAUNCH_PARAM_BUFFER_SIZE ((void *) 2)
#define CU_MEMHOSTALLOC_DEVICEMAP 0x02U

enum {
  CU_STREAM_DEFAULT = 0,
  CU_STREAM_NON_BLOCKING = 1
};

typedef enum {
  CU_LIMIT_STACK_SIZE = 0x00,
  CU_LIMIT_MALLOC_HEAP_SIZE = 0x02,
} CUlimit;

typedef enum {
  CU_MEMORYTYPE_HOST = 0x01,
  CU_MEMORYTYPE_DEVICE = 0x02,
  CU_MEMORYTYPE_ARRAY = 0x03,
  CU_MEMORYTYPE_UNIFIED = 0x04
} CUmemorytype;

typedef enum {
  CU_POINTER_ATTRIBUTE_CONTEXT = 0x01,
  CU_POINTER_ATTRIBUTE_MEMORY_TYPE = 0x02,
  CU_POINTER_ATTRIBUTE_DEVICE_POINTER = 0x03,
  CU_POINTER_ATTRIBUTE_HOST_POINTER = 0x04
} CUpointer_attribute;

typedef struct {
  size_t srcXInBytes, srcY;
  CUmemorytype srcMemoryType;
  const void *srcHost;
  CUdeviceptr srcDevice;
  CUarray srcArray;
  size_t srcPitch;

  size_t dstXInBytes, dstY;
  CUmemorytype dstMemoryType;
  void *dstHost;
  CUdeviceptr dstDevice;
  CUarray dstArray;
  size_t dstPitch;

  size_t WidthInBytes, Height;
} CUDA_MEMCPY2D;

typedef struct {
  size_t srcXInBytes, srcY, srcZ;
  size_t srcLOD;
  CUmemorytype srcMemoryType;
  const void *srcHost;
  CUdeviceptr srcDevice;
  CUarray srcArray;
  void *reserved0;
  size_t srcPitch, srcHeight;

  size_t dstXInBytes, dstY, dstZ;
  size_t dstLOD;
  CUmemorytype dstMemoryType;
  void *dstHost;
  CUdeviceptr dstDevice;
  CUarray dstArray;
  void *reserved1;
  size_t dstPitch, dstHeight;

  size_t WidthInBytes, Height, Depth;
} CUDA_MEMCPY3D;

typedef struct {
  size_t srcXInBytes, srcY, srcZ;
  size_t srcLOD;
  CUmemorytype srcMemoryType;
  const void *srcHost;
  CUdeviceptr srcDevice;
  CUarray srcArray;
  CUcontext srcContext;
  size_t srcPitch, srcHeight;

  size_t dstXInBytes, dstY, dstZ;
  size_t dstLOD;
  CUmemorytype dstMemoryType;
  void *dstHost;
  CUdeviceptr dstDevice;
  CUarray dstArray;
  CUcontext dstContext;
  size_t dstPitch, dstHeight;

  size_t WidthInBytes, Height, Depth;
} CUDA_MEMCPY3D_PEER;

typedef struct {
  char bytes[16];
} CUuuid;

#define cuCtxCreate cuCtxCreate_v2
CUresult cuCtxCreate (CUcontext *, unsigned, CUdevice);
#define cuCtxDestroy cuCtxDestroy_v2
CUresult cuCtxDestroy (CUcontext);
CUresult cuCtxGetCurrent (CUcontext *);
CUresult cuCtxGetDevice (CUdevice *);
#define cuCtxPopCurrent cuCtxPopCurrent_v2
CUresult cuCtxPopCurrent (CUcontext *);
#define cuCtxPushCurrent cuCtxPushCurrent_v2
CUresult cuCtxPushCurrent (CUcontext);
CUresult cuCtxSynchronize (void);
CUresult cuCtxSetLimit (CUlimit, size_t);
CUresult cuDeviceGet (CUdevice *, int);
/* _v2 was added in CUDA 11.4 and 'will supplant' the old one in 12.0.  */
CUresult cuDeviceGetUuid (CUuuid*, CUdevice);
CUresult cuDeviceGetUuid_v2 (CUuuid*, CUdevice);
#define cuDeviceTotalMem cuDeviceTotalMem_v2
CUresult cuDeviceTotalMem (size_t *, CUdevice);
CUresult cuDeviceGetAttribute (int *, CUdevice_attribute, CUdevice);
CUresult cuDeviceGetCount (int *);
CUresult cuDeviceGetName (char *, int, CUdevice);
CUresult cuEventCreate (CUevent *, unsigned);
#define cuEventDestroy cuEventDestroy_v2
CUresult cuEventDestroy (CUevent);
CUresult cuEventElapsedTime (float *, CUevent, CUevent);
CUresult cuEventQuery (CUevent);
CUresult cuEventRecord (CUevent, CUstream);
CUresult cuEventSynchronize (CUevent);
CUresult cuFuncGetAttribute (int *, CUfunction_attribute, CUfunction);
CUresult cuGetErrorString (CUresult, const char **);
CUresult cuGetErrorName (CUresult, const char **);
CUresult cuInit (unsigned);
CUresult cuDriverGetVersion (int *);
CUresult cuLaunchKernel (CUfunction, unsigned, unsigned, unsigned, unsigned,
			 unsigned, unsigned, unsigned, CUstream, void **, void **);
#define cuLinkAddData cuLinkAddData_v2
CUresult cuLinkAddData (CUlinkState, CUjitInputType, void *, size_t, const char *,
			unsigned, CUjit_option *, void **);
CUresult cuLinkComplete (CUlinkState, void **, size_t *);
#define cuLinkCreate cuLinkCreate_v2
CUresult cuLinkCreate (unsigned, CUjit_option *, void **, CUlinkState *);
CUresult cuLinkDestroy (CUlinkState);
#define cuMemGetInfo cuMemGetInfo_v2
CUresult cuMemGetInfo (size_t *, size_t *);
#define cuMemAlloc cuMemAlloc_v2
CUresult cuMemAlloc (CUdeviceptr *, size_t);
#define cuMemAllocHost cuMemAllocHost_v2
CUresult cuMemAllocHost (void **, size_t);
CUresult cuMemHostAlloc (void **, size_t, unsigned int);
CUresult cuMemAllocManaged(CUdeviceptr *, size_t, unsigned int);
CUresult cuMemcpy (CUdeviceptr, CUdeviceptr, size_t);
CUresult cuMemcpyPeer (CUdeviceptr, CUcontext, CUdeviceptr, CUcontext, size_t);
CUresult cuMemcpyPeerAsync (CUdeviceptr, CUcontext, CUdeviceptr, CUcontext, size_t, CUstream);
#define cuMemcpyDtoDAsync cuMemcpyDtoDAsync_v2
CUresult cuMemcpyDtoDAsync (CUdeviceptr, CUdeviceptr, size_t, CUstream);
#define cuMemcpyDtoH cuMemcpyDtoH_v2
CUresult cuMemcpyDtoH (void *, CUdeviceptr, size_t);
#define cuMemcpyDtoHAsync cuMemcpyDtoHAsync_v2
CUresult cuMemcpyDtoHAsync (void *, CUdeviceptr, size_t, CUstream);
#define cuMemcpyHtoD cuMemcpyHtoD_v2
CUresult cuMemcpyHtoD (CUdeviceptr, const void *, size_t);
#define cuMemcpyHtoDAsync cuMemcpyHtoDAsync_v2
CUresult cuMemcpyHtoDAsync (CUdeviceptr, const void *, size_t, CUstream);
#define cuMemcpy2D cuMemcpy2D_v2
CUresult cuMemcpy2D (const CUDA_MEMCPY2D *);
#define cuMemcpy2DAsync cuMemcpy2DAsync_v2
CUresult cuMemcpy2DAsync (const CUDA_MEMCPY2D *, CUstream);
#define cuMemcpy2DUnaligned cuMemcpy2DUnaligned_v2
CUresult cuMemcpy2DUnaligned (const CUDA_MEMCPY2D *);
#define cuMemcpy3D cuMemcpy3D_v2
CUresult cuMemcpy3D (const CUDA_MEMCPY3D *);
#define cuMemcpy3DAsync cuMemcpy3DAsync_v2
CUresult cuMemcpy3DAsync (const CUDA_MEMCPY3D *, CUstream);
CUresult cuMemcpy3DPeer (const CUDA_MEMCPY3D_PEER *);
CUresult cuMemcpy3DPeerAsync (const CUDA_MEMCPY3D_PEER *, CUstream);
#define cuMemsetD8 cuMemsetD8_v2
CUresult cuMemsetD8 (CUdeviceptr, unsigned char, size_t);
CUresult cuMemsetD8Async (CUdeviceptr, unsigned char, size_t, CUstream);
#define cuMemFree cuMemFree_v2
CUresult cuMemFree (CUdeviceptr);
CUresult cuMemFreeHost (void *);
#define cuMemGetAddressRange cuMemGetAddressRange_v2
CUresult cuMemGetAddressRange (CUdeviceptr *, size_t *, CUdeviceptr);
#define cuMemHostGetDevicePointer cuMemHostGetDevicePointer_v2
CUresult cuMemHostGetDevicePointer (CUdeviceptr *, void *, unsigned);
CUresult cuModuleGetFunction (CUfunction *, CUmodule, const char *);
#define cuModuleGetGlobal cuModuleGetGlobal_v2
CUresult cuModuleGetGlobal (CUdeviceptr *, size_t *, CUmodule, const char *);
CUresult cuModuleLoad (CUmodule *, const char *);
CUresult cuModuleLoadData (CUmodule *, const void *);
CUresult cuModuleUnload (CUmodule);
CUresult cuPointerGetAttribute (CUmemorytype *, CUpointer_attribute,
				CUdeviceptr);
CUresult cuOccupancyMaxPotentialBlockSize(int *, int *, CUfunction,
					  CUoccupancyB2DSize, size_t, int);
typedef void (*CUstreamCallback)(CUstream, CUresult, void *);
CUresult cuStreamAddCallback(CUstream, CUstreamCallback, void *, unsigned int);
CUresult cuStreamCreate (CUstream *, unsigned);
#define cuStreamDestroy cuStreamDestroy_v2
CUresult cuStreamDestroy (CUstream);
CUresult cuStreamQuery (CUstream);
CUresult cuStreamSynchronize (CUstream);
CUresult cuStreamWaitEvent (CUstream, CUevent, unsigned);

#ifdef __cplusplus
}
#endif

#endif /* GCC_CUDA_H */