libgomp/libgomp-plugin.h

   1 /* The libgomp plugin API.
   2
   3    Copyright (C) 2014-2023 Free Software Foundation, Inc.
   4
   5    Contributed by Mentor Embedded.
   6
   7    This file is part of the GNU Offloading and Multi Processing Library
   8    (libgomp).
   9
  10    Libgomp is free software; you can redistribute it and/or modify it
  11    under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3, or (at your option)
  13    any later version.
  14
  15    Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
  16    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  17    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18    more details.
  19
  20    Under Section 7 of GPL version 3, you are granted additional
  21    permissions described in the GCC Runtime Library Exception, version
  22    3.1, as published by the Free Software Foundation.
  23
  24    You should have received a copy of the GNU General Public License and
  25    a copy of the GCC Runtime Library Exception along with this program;
  26    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  27    <http://www.gnu.org/licenses/>.  */
  28
  29 #ifndef LIBGOMP_PLUGIN_H
  30 #define LIBGOMP_PLUGIN_H 1
  31
  32 #include <stdbool.h>
  33 #include <stddef.h>
  34 #include <stdint.h>
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 /* Capabilities of offloading devices.  */
  41 #define GOMP_OFFLOAD_CAP_SHARED_MEM     (1 << 0)
  42 #define GOMP_OFFLOAD_CAP_NATIVE_EXEC    (1 << 1)
  43 #define GOMP_OFFLOAD_CAP_OPENMP_400     (1 << 2)
  44 #define GOMP_OFFLOAD_CAP_OPENACC_200    (1 << 3)
  45
  46 /* Type of offload target device.  Keep in sync with include/gomp-constants.h.  */
  47 enum offload_target_type
  48 {
  49   OFFLOAD_TARGET_TYPE_HOST = 2,
  50   /* OFFLOAD_TARGET_TYPE_HOST_NONSHM = 3 removed.  */
  51   OFFLOAD_TARGET_TYPE_NVIDIA_PTX = 5,
  52   OFFLOAD_TARGET_TYPE_HSA = 7,
  53   OFFLOAD_TARGET_TYPE_GCN = 8
  54 };
  55
  56 /* Opaque type to represent plugin-dependent implementation of an
  57    OpenACC asynchronous queue.  */
  58 struct goacc_asyncqueue;
  59
  60 /* Used to keep a list of active asynchronous queues.  */
  61 struct goacc_asyncqueue_list
  62 {
  63   struct goacc_asyncqueue *aq;
  64   struct goacc_asyncqueue_list *next;
  65 };
  66
  67 typedef struct goacc_asyncqueue *goacc_aq;
  68 typedef struct goacc_asyncqueue_list *goacc_aq_list;
  69
  70
  71 /* OpenACC 'acc_get_property' support.  */
  72
  73 /* Device property values.  Keep in sync with
  74    'libgomp/{openacc.h,openacc.f90}:acc_device_property_t'.  */
  75 enum goacc_property
  76   {
  77    /* Mask to tell numeric and string values apart.  */
  78 #define GOACC_PROPERTY_STRING_MASK 0x10000
  79
  80    /* Start from 1 to catch uninitialized use.  */
  81    GOACC_PROPERTY_MEMORY =              1,
  82    GOACC_PROPERTY_FREE_MEMORY =         2,
  83    GOACC_PROPERTY_NAME =                GOACC_PROPERTY_STRING_MASK | 1,
  84    GOACC_PROPERTY_VENDOR =              GOACC_PROPERTY_STRING_MASK | 2,
  85    GOACC_PROPERTY_DRIVER =              GOACC_PROPERTY_STRING_MASK | 3
  86   };
  87
  88 /* Container type for passing device properties.  */
  89 union goacc_property_value
  90 {
  91   const char *ptr;
  92   size_t val;
  93 };
  94
  95
  96 /* Auxiliary struct, used for transferring pairs of addresses from plugin
  97    to libgomp.  */
  98 struct addr_pair
  99 {
 100   uintptr_t start;
 101   uintptr_t end;
 102 };
 103
 104 /* This following symbol is used to name the target side variable struct that
 105    holds the designated ICVs of the target device. The symbol needs to be
 106    available to libgomp code and the offload plugin (which in the latter case
 107    must be stringified).  */
 108 #define GOMP_ADDITIONAL_ICVS __gomp_additional_icvs
 109
 110 /* Miscellaneous functions.  */
 111 extern void *GOMP_PLUGIN_malloc (size_t) __attribute__ ((malloc));
 112 extern void *GOMP_PLUGIN_malloc_cleared (size_t) __attribute__ ((malloc));
 113 extern void *GOMP_PLUGIN_realloc (void *, size_t);
 114 void GOMP_PLUGIN_target_task_completion (void *);
 115
 116 extern void GOMP_PLUGIN_debug (int, const char *, ...)
 117         __attribute__ ((format (printf, 2, 3)));
 118 extern void GOMP_PLUGIN_error (const char *, ...)
 119         __attribute__ ((format (printf, 1, 2)));
 120 extern void GOMP_PLUGIN_fatal (const char *, ...)
 121         __attribute__ ((noreturn, format (printf, 1, 2)));
 122
 123 extern void GOMP_PLUGIN_target_rev (uint64_t, uint64_t, uint64_t, uint64_t,
 124                                     uint64_t, int, struct goacc_asyncqueue *);
 125
 126 /* Prototypes for functions implemented by libgomp plugins.  */
 127 extern const char *GOMP_OFFLOAD_get_name (void);
 128 extern unsigned int GOMP_OFFLOAD_get_caps (void);
 129 extern int GOMP_OFFLOAD_get_type (void);
 130 extern int GOMP_OFFLOAD_get_num_devices (unsigned int);
 131 extern bool GOMP_OFFLOAD_init_device (int);
 132 extern bool GOMP_OFFLOAD_fini_device (int);
 133 extern unsigned GOMP_OFFLOAD_version (void);
 134 extern int GOMP_OFFLOAD_load_image (int, unsigned, const void *,
 135                                     struct addr_pair **, uint64_t **);
 136 extern bool GOMP_OFFLOAD_unload_image (int, unsigned, const void *);
 137 extern void *GOMP_OFFLOAD_alloc (int, size_t);
 138 extern bool GOMP_OFFLOAD_free (int, void *);
 139 extern bool GOMP_OFFLOAD_dev2host (int, void *, const void *, size_t);
 140 extern bool GOMP_OFFLOAD_host2dev (int, void *, const void *, size_t);
 141 extern bool GOMP_OFFLOAD_dev2dev (int, void *, const void *, size_t);
 142 extern bool GOMP_OFFLOAD_can_run (void *);
 143 extern void GOMP_OFFLOAD_run (int, void *, void *, void **);
 144 extern void GOMP_OFFLOAD_async_run (int, void *, void *, void **, void *);
 145
 146 extern void GOMP_OFFLOAD_openacc_exec (void (*) (void *), size_t, void **,
 147                                        void **, unsigned *, void *);
 148 extern void *GOMP_OFFLOAD_openacc_create_thread_data (int);
 149 extern void GOMP_OFFLOAD_openacc_destroy_thread_data (void *);
 150 extern struct goacc_asyncqueue *GOMP_OFFLOAD_openacc_async_construct (int);
 151 extern bool GOMP_OFFLOAD_openacc_async_destruct (struct goacc_asyncqueue *);
 152 extern int GOMP_OFFLOAD_openacc_async_test (struct goacc_asyncqueue *);
 153 extern bool GOMP_OFFLOAD_openacc_async_synchronize (struct goacc_asyncqueue *);
 154 extern bool GOMP_OFFLOAD_openacc_async_serialize (struct goacc_asyncqueue *,
 155                                                   struct goacc_asyncqueue *);
 156 extern void GOMP_OFFLOAD_openacc_async_queue_callback (struct goacc_asyncqueue *,
 157                                                        void (*)(void *), void *);
 158 extern void GOMP_OFFLOAD_openacc_async_exec (void (*) (void *), size_t, void **,
 159                                              void **, unsigned *, void *,
 160                                              struct goacc_asyncqueue *);
 161 extern bool GOMP_OFFLOAD_openacc_async_dev2host (int, void *, const void *, size_t,
 162                                                  struct goacc_asyncqueue *);
 163 extern bool GOMP_OFFLOAD_openacc_async_host2dev (int, void *, const void *, size_t,
 164                                                  struct goacc_asyncqueue *);
 165 extern void *GOMP_OFFLOAD_openacc_cuda_get_current_device (void);
 166 extern void *GOMP_OFFLOAD_openacc_cuda_get_current_context (void);
 167 extern void *GOMP_OFFLOAD_openacc_cuda_get_stream (struct goacc_asyncqueue *);
 168 extern int GOMP_OFFLOAD_openacc_cuda_set_stream (struct goacc_asyncqueue *,
 169                                                  void *);
 170 extern union goacc_property_value
 171   GOMP_OFFLOAD_openacc_get_property (int, enum goacc_property);
 172
 173 #ifdef __cplusplus
 174 }
 175 #endif
 176
 177 #endif