Hardware Locality (hwloc) 2.14.0

amdsmi.h
1/*
2 * SPDX-License-Identifier: BSD-3-Clause
3 * Copyright © 2012-2026 Inria. All rights reserved.
4 * Copyright (c) 2020, Advanced Micro Devices, Inc. All rights reserved.
5 * Written by Advanced Micro Devices,
6 * See COPYING in top-level directory.
7 */
8
15
16#ifndef HWLOC_AMDSMI_H
17#define HWLOC_AMDSMI_H
18
19#include "hwloc.h"
20#include "hwloc/autogen/config.h"
21#include "hwloc/helper.h"
22#ifdef HWLOC_LINUX_SYS
23#include "hwloc/linux.h"
24#endif
25
26#include <amd_smi/amdsmi.h>
27
28
29#ifdef __cplusplus
30 extern "C" {
31#endif
32
33
41
63 static __hwloc_inline int
64 hwloc_amdsmi_get_device_cpuset(hwloc_topology_t topology,
65 amdsmi_processor_handle proc, hwloc_cpuset_t set)
66{
67#ifdef HWLOC_LINUX_SYS
68 /* If we're on Linux, use the sysfs mechanism to get the local cpus */
69#define HWLOC_RSMI_DEVICE_SYSFS_PATH_MAX 128
70 char path[HWLOC_RSMI_DEVICE_SYSFS_PATH_MAX];
71 amdsmi_status_t ret;
72 uint64_t bdfid = 0;
73 unsigned domain, device, bus;
74
75 if (!hwloc_topology_is_thissystem(topology)) {
76 errno = EINVAL;
77 return -1;
78 }
79
80 ret = amdsmi_get_gpu_bdf_id(proc, &bdfid);
81 if (AMDSMI_STATUS_SUCCESS != ret) {
82 errno = EINVAL;
83 return -1;
84 }
85 domain = (bdfid>>32) & 0xffffffff;
86 bus = ((bdfid & 0xffff)>>8) & 0xff;
87 device = ((bdfid & 0xff)>>3) & 0x1f;
88
89 sprintf(path, "/sys/bus/pci/devices/%04x:%02x:%02x.0/local_cpus", domain, bus, device);
90 if (hwloc_linux_read_path_as_cpumask(path, set) < 0
91 || hwloc_bitmap_iszero(set))
92 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
93#else
94 /* Non-Linux systems simply get a full cpuset */
95 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
96#endif
97 return 0;
98}
99
115 static __hwloc_inline hwloc_obj_t
116 hwloc_amdsmi_get_device_osdev_by_index(hwloc_topology_t topology, uint32_t hip_id)
117{
118 hwloc_obj_t osdev = NULL;
119 while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
120 if (HWLOC_OBJ_OSDEV_GPU == osdev->attr->osdev.type
121 && osdev->name
122 && !strncmp("rsmi", osdev->name, 4)
123 && atoi(osdev->name + 4) == (int) hip_id)
124 return osdev;
125 }
126 return NULL;
127}
128
144 static __hwloc_inline hwloc_obj_t
145 hwloc_amdsmi_get_device_osdev(hwloc_topology_t topology, amdsmi_processor_handle proc)
146{
147 amdsmi_status_t ret;
148 amdsmi_enumeration_info_t enum_info;
149
150 ret = amdsmi_get_gpu_enumeration_info(proc, &enum_info);
151 if (AMDSMI_STATUS_SUCCESS != ret)
152 return NULL;
153
154 return hwloc_amdsmi_get_device_osdev_by_index(topology, enum_info.hip_id);
155}
156
158
159
160#ifdef __cplusplus
161} /* extern "C" */
162#endif
163
164
165#endif /* HWLOC_AMDSMI_H */
hwloc_cpuset_t
hwloc_bitmap_t hwloc_cpuset_t
A CPU set is a bitmap whose bits are set according to CPU physical OS indexes.
Definition hwloc.h:165
HWLOC_OBJ_OSDEV_GPU
@ HWLOC_OBJ_OSDEV_GPU
Operating system GPU device. For instance ":0.0" for a GL display, "card0" for a Linux DRM device.
Definition hwloc.h:380
hwloc_obj_t
struct hwloc_obj * hwloc_obj_t
Convenience typedef; a pointer to a struct hwloc_obj.
Definition hwloc.h:637
hwloc_topology_t
struct hwloc_topology * hwloc_topology_t
Topology context.
Definition hwloc.h:748
hwloc_topology_is_thissystem
int hwloc_topology_is_thissystem(hwloc_topology_t restrict topology)
Does the topology context come from this system?
hwloc_topology_get_complete_cpuset
hwloc_const_cpuset_t hwloc_topology_get_complete_cpuset(hwloc_topology_t topology)
Get complete CPU set.
hwloc_get_next_osdev
hwloc_obj_t hwloc_get_next_osdev(hwloc_topology_t topology, hwloc_obj_t prev)
Get the next OS device in the system.
Definition helper.h:1291
hwloc_bitmap_iszero
int hwloc_bitmap_iszero(hwloc_const_bitmap_t bitmap)
Test whether bitmap bitmap is empty.
hwloc_bitmap_copy
int hwloc_bitmap_copy(hwloc_bitmap_t dst, hwloc_const_bitmap_t src)
Copy the contents of bitmap src into the already allocated bitmap dst.
hwloc_linux_read_path_as_cpumask
int hwloc_linux_read_path_as_cpumask(const char *path, hwloc_bitmap_t set)
Convert a linux kernel cpumask file path into a hwloc bitmap set.
hwloc_amdsmi_get_device_osdev_by_index
hwloc_obj_t hwloc_amdsmi_get_device_osdev_by_index(hwloc_topology_t topology, uint32_t hip_id)
Get the hwloc OS device object corresponding to the AMD GPU device whose HIP index is hip_id.
Definition amdsmi.h:116
hwloc_amdsmi_get_device_cpuset
int hwloc_amdsmi_get_device_cpuset(hwloc_topology_t topology, amdsmi_processor_handle proc, hwloc_cpuset_t set)
Get the CPU set of logical processors that are physically close to AMD GPU device whose index is dv_i...
Definition amdsmi.h:64
hwloc_amdsmi_get_device_osdev
hwloc_obj_t hwloc_amdsmi_get_device_osdev(hwloc_topology_t topology, amdsmi_processor_handle proc)
Get the hwloc OS device object corresponding to AMD GPU device, whose processor handle is proc.
Definition amdsmi.h:145
hwloc_obj::name
char * name
Object-specific name if any. Mostly used for identifying OS devices and Misc objects where a name str...
Definition hwloc.h:449
hwloc_obj::attr
union hwloc_obj_attr_u * attr
Object type-specific Attributes, may be NULL if no attribute value was found.
Definition hwloc.h:456
hwloc_obj_attr_u::osdev
struct hwloc_obj_attr_u::hwloc_osdev_attr_s osdev
hwloc_obj_attr_u::hwloc_osdev_attr_s::type
hwloc_obj_osdev_type_t type
Definition hwloc.h:722