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00014 #ifndef HWLOC_OPENCL_H
00015 #define HWLOC_OPENCL_H
00016
00017 #include "hwloc.h"
00018 #include "hwloc/autogen/config.h"
00019 #include "hwloc/helper.h"
00020 #ifdef HWLOC_LINUX_SYS
00021 #include "hwloc/linux.h"
00022 #endif
00023
00024 #ifdef __APPLE__
00025 #include <OpenCL/cl.h>
00026 #else
00027 #include <CL/cl.h>
00028 #endif
00029
00030 #include <stdio.h>
00031
00032
00033 #ifdef __cplusplus
00034 extern "C" {
00035 #endif
00036
00037
00038
00039
00040
00041
00042
00043
00044
00045 #define HWLOC_CL_DEVICE_TOPOLOGY_AMD 0x4037
00046 typedef union {
00047 struct { cl_uint type; cl_uint data[5]; } raw;
00048 struct { cl_uint type; cl_char unused[17]; cl_char bus; cl_char device; cl_char function; } pcie;
00049 } hwloc_cl_device_topology_amd;
00050 #define HWLOC_CL_DEVICE_TOPOLOGY_TYPE_PCIE_AMD 1
00051
00052
00053 #define HWLOC_CL_DEVICE_PCI_BUS_ID_NV 0x4008
00054 #define HWLOC_CL_DEVICE_PCI_SLOT_ID_NV 0x4009
00055 #define HWLOC_CL_DEVICE_PCI_DOMAIN_ID_NV 0x400A
00056
00057
00073 static __hwloc_inline int
00074 hwloc_opencl_get_device_pci_busid(cl_device_id device,
00075 unsigned *domain, unsigned *bus, unsigned *dev, unsigned *func)
00076 {
00077 hwloc_cl_device_topology_amd amdtopo;
00078 cl_uint nvbus, nvslot, nvdomain;
00079 cl_int clret;
00080
00081 clret = clGetDeviceInfo(device, HWLOC_CL_DEVICE_TOPOLOGY_AMD, sizeof(amdtopo), &amdtopo, NULL);
00082 if (CL_SUCCESS == clret
00083 && HWLOC_CL_DEVICE_TOPOLOGY_TYPE_PCIE_AMD == amdtopo.raw.type) {
00084 *domain = 0;
00085 *bus = (unsigned) amdtopo.pcie.bus;
00086 *dev = (unsigned) amdtopo.pcie.device;
00087 *func = (unsigned) amdtopo.pcie.function;
00088 return 0;
00089 }
00090
00091 clret = clGetDeviceInfo(device, HWLOC_CL_DEVICE_PCI_BUS_ID_NV, sizeof(nvbus), &nvbus, NULL);
00092 if (CL_SUCCESS == clret) {
00093 clret = clGetDeviceInfo(device, HWLOC_CL_DEVICE_PCI_SLOT_ID_NV, sizeof(nvslot), &nvslot, NULL);
00094 if (CL_SUCCESS == clret) {
00095 clret = clGetDeviceInfo(device, HWLOC_CL_DEVICE_PCI_DOMAIN_ID_NV, sizeof(nvdomain), &nvdomain, NULL);
00096 if (CL_SUCCESS == clret) {
00097 *domain = nvdomain;
00098 } else {
00099 *domain = 0;
00100 }
00101 *bus = nvbus & 0xff;
00102
00103 *dev = nvslot >> 3;
00104 *func = nvslot & 0x7;
00105 return 0;
00106 }
00107 }
00108
00109 return -1;
00110 }
00111
00129 static __hwloc_inline int
00130 hwloc_opencl_get_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused,
00131 cl_device_id device __hwloc_attribute_unused,
00132 hwloc_cpuset_t set)
00133 {
00134 #if (defined HWLOC_LINUX_SYS)
00135
00136 #define HWLOC_OPENCL_DEVICE_SYSFS_PATH_MAX 128
00137 char path[HWLOC_OPENCL_DEVICE_SYSFS_PATH_MAX];
00138 unsigned pcidomain, pcibus, pcidev, pcifunc;
00139
00140 if (!hwloc_topology_is_thissystem(topology)) {
00141 errno = EINVAL;
00142 return -1;
00143 }
00144
00145 if (hwloc_opencl_get_device_pci_busid(device, &pcidomain, &pcibus, &pcidev, &pcifunc) < 0) {
00146 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
00147 return 0;
00148 }
00149
00150 sprintf(path, "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/local_cpus", pcidomain, pcibus, pcidev, pcifunc);
00151 if (hwloc_linux_read_path_as_cpumask(path, set) < 0
00152 || hwloc_bitmap_iszero(set))
00153 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
00154 #else
00155
00156 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
00157 #endif
00158 return 0;
00159 }
00160
00176 static __hwloc_inline hwloc_obj_t
00177 hwloc_opencl_get_device_osdev_by_index(hwloc_topology_t topology,
00178 unsigned platform_index, unsigned device_index)
00179 {
00180 unsigned x = (unsigned) -1, y = (unsigned) -1;
00181 hwloc_obj_t osdev = NULL;
00182 while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
00183 if (HWLOC_OBJ_OSDEV_COPROC == osdev->attr->osdev.type
00184 && osdev->name
00185 && sscanf(osdev->name, "opencl%ud%u", &x, &y) == 2
00186 && platform_index == x && device_index == y)
00187 return osdev;
00188 }
00189 return NULL;
00190 }
00191
00212 static __hwloc_inline hwloc_obj_t
00213 hwloc_opencl_get_device_osdev(hwloc_topology_t topology __hwloc_attribute_unused,
00214 cl_device_id device __hwloc_attribute_unused)
00215 {
00216 hwloc_obj_t osdev;
00217 unsigned pcidomain, pcibus, pcidevice, pcifunc;
00218
00219 if (hwloc_opencl_get_device_pci_busid(device, &pcidomain, &pcibus, &pcidevice, &pcifunc) < 0) {
00220 errno = EINVAL;
00221 return NULL;
00222 }
00223
00224 osdev = NULL;
00225 while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
00226 hwloc_obj_t pcidev = osdev->parent;
00227 if (strncmp(osdev->name, "opencl", 6))
00228 continue;
00229 if (pcidev
00230 && pcidev->type == HWLOC_OBJ_PCI_DEVICE
00231 && pcidev->attr->pcidev.domain == pcidomain
00232 && pcidev->attr->pcidev.bus == pcibus
00233 && pcidev->attr->pcidev.dev == pcidevice
00234 && pcidev->attr->pcidev.func == pcifunc)
00235 return osdev;
00236
00237 }
00238
00239 return NULL;
00240 }
00241
00245 #ifdef __cplusplus
00246 }
00247 #endif
00248
00249
00250 #endif