levelzero.h

/*
 * SPDX-License-Identifier: BSD-3-Clause
 * Copyright © 2021-2026 Inria.  All rights reserved.
 * See COPYING in top-level directory.
 */

 
#ifndef HWLOC_LEVELZERO_H
#define HWLOC_LEVELZERO_H
 
#include "hwloc.h"
#include "hwloc/autogen/config.h"
#include "hwloc/helper.h"
 
#include <level_zero/ze_api.h>
#include <level_zero/zes_api.h>
 
 
#ifdef __cplusplus
extern "C" {
#endif
 


static __hwloc_inline int
hwloc_levelzero_get_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused,
                                  ze_device_handle_t device, hwloc_cpuset_t set)
{
  ze_pci_ext_properties_t pci;
  ze_result_t res;
 
  pci.stype =  ZE_STRUCTURE_TYPE_PCI_EXT_PROPERTIES;
  pci.pNext = NULL;
  res = zeDevicePciGetPropertiesExt(device, &pci);
  if (res != ZE_RESULT_SUCCESS) {
    errno = EINVAL;
    return -1;
  }
 
  return hwloc_get_pci_busid_cpuset(topology, set,
                                    pci.address.domain, pci.address.bus, pci.address.device, pci.address.function);
}

static __hwloc_inline int
hwloc_levelzero_get_sysman_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused,
                                         zes_device_handle_t device, hwloc_cpuset_t set)
{
  hwloc_obj_t parent;
  zes_pci_properties_t pci;
  ze_result_t res;
 
  pci.stype =  ZES_STRUCTURE_TYPE_PCI_PROPERTIES;
  pci.pNext = NULL;
  res = zesDevicePciGetProperties(device, &pci);
  if (res != ZE_RESULT_SUCCESS) {
    errno = EINVAL;
    return -1;
  }
 
  return hwloc_get_pci_busid_cpuset(topology,
                                    set,
                                    pci.address.domain, pci.address.bus, pci.address.device, pci.address.function);
}

static __hwloc_inline hwloc_obj_t
hwloc_levelzero_get_device_osdev(hwloc_topology_t topology, ze_device_handle_t device)
{
  ze_pci_ext_properties_t pci;
  ze_result_t res;
  hwloc_obj_t osdev;
 
  if (!hwloc_topology_is_thissystem(topology)) {
    errno = EINVAL;
    return NULL;
  }
 
  pci.stype = ZE_STRUCTURE_TYPE_PCI_EXT_PROPERTIES;
  pci.pNext = NULL;
  res = zeDevicePciGetPropertiesExt(device, &pci);
  if (res != ZE_RESULT_SUCCESS) {
    errno = EINVAL;
    return NULL;
  }
 
  osdev = NULL;
  while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
    hwloc_obj_t pcidev;
 
    if (strncmp(osdev->name, "ze", 2))
      continue;
 
    pcidev = osdev;
    while (pcidev && pcidev->type != HWLOC_OBJ_PCI_DEVICE)
      pcidev = pcidev->parent;
    if (!pcidev)
      continue;
 
    if (pcidev
      && pcidev->type == HWLOC_OBJ_PCI_DEVICE
      && pcidev->attr->pcidev.domain == pci.address.domain
      && pcidev->attr->pcidev.bus == pci.address.bus
      && pcidev->attr->pcidev.dev == pci.address.device
      && pcidev->attr->pcidev.func == pci.address.function)
      return osdev;
 
    /* FIXME: when we'll have serialnumber, try it in case PCI is filtered-out */
  }
 
  return NULL;
}

static __hwloc_inline hwloc_obj_t
hwloc_levelzero_get_sysman_device_osdev(hwloc_topology_t topology, zes_device_handle_t device)
{
  zes_pci_properties_t pci;
  ze_result_t res;
  hwloc_obj_t osdev;
 
  if (!hwloc_topology_is_thissystem(topology)) {
    errno = EINVAL;
    return NULL;
  }
 
  pci.stype = ZES_STRUCTURE_TYPE_PCI_PROPERTIES;
  pci.pNext = NULL;
  res = zesDevicePciGetProperties(device, &pci);
  if (res != ZE_RESULT_SUCCESS) {
    errno = EINVAL;
    return NULL;
  }
 
  osdev = NULL;
  while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
    hwloc_obj_t pcidev;
 
    if (strncmp(osdev->name, "ze", 2))
      continue;
 
    pcidev = osdev;
    while (pcidev && pcidev->type != HWLOC_OBJ_PCI_DEVICE)
      pcidev = pcidev->parent;
    if (!pcidev)
      continue;
 
    if (pcidev
      && pcidev->type == HWLOC_OBJ_PCI_DEVICE
      && pcidev->attr->pcidev.domain == pci.address.domain
      && pcidev->attr->pcidev.bus == pci.address.bus
      && pcidev->attr->pcidev.dev == pci.address.device
      && pcidev->attr->pcidev.func == pci.address.function)
      return osdev;
 
    /* FIXME: when we'll have serialnumber, try it in case PCI is filtered-out */
  }
 
  return NULL;
}

 
 
#ifdef __cplusplus
} /* extern "C" */
#endif
 
 
#endif /* HWLOC_LEVELZERO_H */