Hardware Locality (hwloc): rsmi.h Source File

Hardware Locality (hwloc) 2.14.0rc1

rsmi.h
1/*
2 * SPDX-License-Identifier: BSD-3-Clause
3 * Copyright © 2012-2023 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_RSMI_H
17#define HWLOC_RSMI_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 <rocm_smi/rocm_smi.h>
27
28
29#ifdef __cplusplus
30extern "C" {
31#endif
32
33
41
63static __hwloc_inline int
64hwloc_rsmi_get_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused,
65 uint32_t dv_ind, 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 rsmi_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 = rsmi_dev_pci_id_get(dv_ind, &bdfid);
81 if (RSMI_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
115static __hwloc_inline hwloc_obj_t
116hwloc_rsmi_get_device_osdev_by_index(hwloc_topology_t topology, uint32_t dv_ind)
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) dv_ind)
124 return osdev;
125 }
126 return NULL;
127}
128
144static __hwloc_inline hwloc_obj_t
145hwloc_rsmi_get_device_osdev(hwloc_topology_t topology, uint32_t dv_ind)
146{
147 hwloc_obj_t osdev;
148 rsmi_status_t ret;
149 uint64_t bdfid = 0;
150 unsigned domain, device, bus, func;
151 uint64_t id;
152 char uuid[64];
153
154 if (!hwloc_topology_is_thissystem(topology)) {
155 errno = EINVAL;
156 return NULL;
157 }
158
159 ret = rsmi_dev_pci_id_get(dv_ind, &bdfid);
160 if (RSMI_STATUS_SUCCESS != ret) {
161 errno = EINVAL;
162 return NULL;
163 }
164 domain = (bdfid>>32) & 0xffffffff;
165 bus = ((bdfid & 0xffff)>>8) & 0xff;
166 device = ((bdfid & 0xff)>>3) & 0x1f;
167 func = bdfid & 0x7;
168
169 ret = rsmi_dev_unique_id_get(dv_ind, &id);
170 if (RSMI_STATUS_SUCCESS != ret)
171 uuid[0] = '\0';
172 else
173 sprintf(uuid, "%lx", id);
174
175 osdev = NULL;
176 while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
177 hwloc_obj_t pcidev = osdev->parent;
178 const char *info;
179
180 if (strncmp(osdev->name, "rsmi", 4))
181 continue;
182
183 if (pcidev
184 && pcidev->type == HWLOC_OBJ_PCI_DEVICE
185 && pcidev->attr->pcidev.domain == domain
186 && pcidev->attr->pcidev.bus == bus
187 && pcidev->attr->pcidev.dev == device
188 && pcidev->attr->pcidev.func == func)
189 return osdev;
190
191 info = hwloc_obj_get_info_by_name(osdev, "AMDUUID");
192 if (info && !strcmp(info, uuid))
193 return osdev;
194 }
195
196 return NULL;
197}
198
200
201
202#ifdef __cplusplus
203} /* extern "C" */
204#endif
205
206
207#endif /* HWLOC_RSMI_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_PCI_DEVICE
@ HWLOC_OBJ_PCI_DEVICE
PCI device (filtered out by default).
Definition hwloc.h:300
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_obj_get_info_by_name
const char * hwloc_obj_get_info_by_name(hwloc_obj_t obj, const char *name)
Search the given name in object infos and return the corresponding value.
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_rsmi_get_device_cpuset
int hwloc_rsmi_get_device_cpuset(hwloc_topology_t topology, uint32_t dv_ind, 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 rsmi.h:64
hwloc_rsmi_get_device_osdev
hwloc_obj_t hwloc_rsmi_get_device_osdev(hwloc_topology_t topology, uint32_t dv_ind)
Get the hwloc OS device object corresponding to AMD GPU device, whose index is dv_ind.
Definition rsmi.h:145
hwloc_rsmi_get_device_osdev_by_index
hwloc_obj_t hwloc_rsmi_get_device_osdev_by_index(hwloc_topology_t topology, uint32_t dv_ind)
Get the hwloc OS device object corresponding to the AMD GPU device whose index is dv_ind.
Definition rsmi.h:116
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::type
hwloc_obj_type_t type
Type of object.
Definition hwloc.h:439
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::parent
struct hwloc_obj * parent
Parent, NULL if root (Machine object).
Definition hwloc.h:487
hwloc_obj_attr_u::pcidev
struct hwloc_obj_attr_u::hwloc_pcidev_attr_s pcidev
hwloc_obj_attr_u::osdev
struct hwloc_obj_attr_u::hwloc_osdev_attr_s osdev
hwloc_obj_attr_u::hwloc_pcidev_attr_s::dev
unsigned char dev
Device number (zz in the PCI BDF notation xxxx:yy:zz.t).
Definition hwloc.h:683
hwloc_obj_attr_u::hwloc_pcidev_attr_s::func
unsigned char func
Function number (t in the PCI BDF notation xxxx:yy:zz.t).
Definition hwloc.h:684
hwloc_obj_attr_u::hwloc_pcidev_attr_s::domain
unsigned short domain
Domain number (xxxx in the PCI BDF notation xxxx:yy:zz.t). Only 16bits PCI domains are supported by d...
Definition hwloc.h:676
hwloc_obj_attr_u::hwloc_pcidev_attr_s::bus
unsigned char bus
Bus number (yy in the PCI BDF notation xxxx:yy:zz.t).
Definition hwloc.h:682
hwloc_obj_attr_u::hwloc_osdev_attr_s::type
hwloc_obj_osdev_type_t type
Definition hwloc.h:722