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35 /*! \libinternal \file
36 * \brief Declare utility routines for OpenCL
38 * \author Anca Hamuraru <anca@streamcomputing.eu>
41 #ifndef GMX_GPU_UTILS_OCLUTILS_H
42 #define GMX_GPU_UTILS_OCLUTILS_H
44 /*! \brief Declare to OpenCL SDKs that we intend to use OpenCL API
45 features that were deprecated in 2.0, so that they don't warn about
47 #define CL_USE_DEPRECATED_OPENCL_2_0_APIS
49 # include <OpenCL/opencl.h>
51 # include <CL/opencl.h>
56 /*! \brief OpenCL vendor IDs */
58 OCL_VENDOR_NVIDIA = 0,
65 * \brief OpenCL GPU device identificator
67 * An OpenCL device is identified by its ID.
68 * The platform ID is also included for caching reasons.
72 cl_platform_id ocl_platform_id; /**< Platform ID */
73 cl_device_id ocl_device_id; /**< Device ID */
77 * \brief OpenCL device information.
79 * The OpenCL device information is queried and set at detection and contains
80 * both information about the device/hardware returned by the runtime as well
81 * as additional data like support status.
83 struct gmx_device_info_t
85 ocl_gpu_id_t ocl_gpu_id; /**< device ID assigned at detection */
86 char device_name[256]; /**< device name */
87 char device_version[256]; /**< device version */
88 char device_vendor[256]; /**< device vendor */
89 int compute_units; /**< number of compute units */
90 int adress_bits; /**< number of adress bits the device is capable of */
91 int stat; /**< device status takes values of e_gpu_detect_res_t */
92 ocl_vendor_id_t vendor_e; /**< device vendor as defined by ocl_vendor_id_t */
96 * \brief OpenCL GPU runtime data
98 * The device runtime data is meant to hold objects associated with a GROMACS rank's
99 * (thread or process) use of a single device (multiple devices per rank is not
100 * implemented). These objects should be constructed at ther point where a device
101 * dets assigned to a rank and released at when this assignment is no longer valid
102 * (i.e. at cleanup in the current implementation).
105 struct gmx_device_runtime_data_t
107 cl_context context; /**< OpenCL context */
108 cl_program program; /**< OpenCL program */
112 /*! \brief Launches asynchronous host to device memory copy. */
113 int ocl_copy_H2D_async(cl_mem d_dest, void * h_src,
114 size_t offset, size_t bytes,
115 cl_command_queue command_queue,
116 cl_event *copy_event);
118 /*! \brief Launches asynchronous device to host memory copy. */
119 int ocl_copy_D2H_async(void * h_dest, cl_mem d_src,
120 size_t offset, size_t bytes,
121 cl_command_queue command_queue,
122 cl_event *copy_event);
124 /*! \brief Launches synchronous host to device memory copy. */
125 int ocl_copy_H2D(cl_mem d_dest, void * h_src,
126 size_t offset, size_t bytes,
127 cl_command_queue command_queue);
129 /*! \brief Allocate host memory in malloc style */
130 void ocl_pmalloc(void **h_ptr, size_t nbytes);
132 /*! \brief Free host memory in malloc style */
133 void ocl_pfree(void *h_ptr);
135 /*! \brief Convert error code to diagnostic string */
136 std::string ocl_get_error_string(cl_int error);