openfabrics-verbs.h
/*
* Copyright © 2009 CNRS
* Copyright © 2009-2013 Inria. All rights reserved.
* Copyright © 2009-2010 Université Bordeaux 1
* Copyright © 2009-2011 Cisco Systems, Inc. All rights reserved.
* See COPYING in top-level directory.
*/
#ifndef HWLOC_OPENFABRICS_VERBS_H
#define HWLOC_OPENFABRICS_VERBS_H
#include <hwloc.h>
#include <hwloc/autogen/config.h>
#ifdef HWLOC_LINUX_SYS
#include <hwloc/linux.h>
#endif
#include <infiniband/verbs.h>
#ifdef __cplusplus
extern "C" {
#endif
static inline int
hwloc_ibv_get_device_cpuset(hwloc_topology_t topology ,
struct ibv_device *ibdev, hwloc_cpuset_t set)
{
#ifdef HWLOC_LINUX_SYS
/* If we're on Linux, use the verbs-provided sysfs mechanism to
get the local cpus */
#define HWLOC_OPENFABRICS_VERBS_SYSFS_PATH_MAX 128
char path[HWLOC_OPENFABRICS_VERBS_SYSFS_PATH_MAX];
FILE *sysfile = NULL;
if (!hwloc_topology_is_thissystem(topology)) {
errno = EINVAL;
return -1;
}
sprintf(path, "/sys/class/infiniband/%s/device/local_cpus",
ibv_get_device_name(ibdev));
sysfile = fopen(path, "r");
if (!sysfile)
return -1;
hwloc_linux_parse_cpumap_file(sysfile, set);
if (hwloc_bitmap_iszero(set))
hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
fclose(sysfile);
#else
/* Non-Linux systems simply get a full cpuset */
hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
#endif
return 0;
}
static inline hwloc_obj_t
hwloc_ibv_get_device_osdev_by_name(hwloc_topology_t topology,
const char *ibname)
{
hwloc_obj_t osdev = NULL;
while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
if (HWLOC_OBJ_OSDEV_OPENFABRICS == osdev->attr->osdev.type
&& osdev->name && !strcmp(ibname, osdev->name))
return osdev;
}
return NULL;
}
static inline hwloc_obj_t
hwloc_ibv_get_device_osdev(hwloc_topology_t topology,
struct ibv_device *ibdev)
{
if (!hwloc_topology_is_thissystem(topology)) {
errno = EINVAL;
return NULL;
}
return hwloc_ibv_get_device_osdev_by_name(topology, ibv_get_device_name(ibdev));
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* HWLOC_OPENFABRICS_VERBS_H */