Hardware Locality (hwloc): rsmi.h Source File

Hardware Locality (hwloc) 2.8.0

rsmi.h
1 /*
2 * Copyright © 2012-2021 Inria. All rights reserved.
3 * Copyright (c) 2020, Advanced Micro Devices, Inc. All rights reserved.
4 * Written by Advanced Micro Devices,
5 * See COPYING in top-level directory.
6 */
7
15 #ifndef HWLOC_RSMI_H
16 #define HWLOC_RSMI_H
17
18 #include "hwloc.h"
19 #include "hwloc/autogen/config.h"
20 #include "hwloc/helper.h"
21 #ifdef HWLOC_LINUX_SYS
22 #include "hwloc/linux.h"
23 #endif
24
25 #include <rocm_smi/rocm_smi.h>
26
27
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
31
32
59 static __hwloc_inline int
60 hwloc_rsmi_get_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused,
61 uint32_t dv_ind, hwloc_cpuset_t set)
62 {
63 #ifdef HWLOC_LINUX_SYS
64 /* If we're on Linux, use the sysfs mechanism to get the local cpus */
65 #define HWLOC_RSMI_DEVICE_SYSFS_PATH_MAX 128
66 char path[HWLOC_RSMI_DEVICE_SYSFS_PATH_MAX];
67 rsmi_status_t ret;
68 uint64_t bdfid = 0;
69 unsigned domain, device, bus;
70
71 if (!hwloc_topology_is_thissystem(topology)) {
72 errno = EINVAL;
73 return -1;
74 }
75
76 ret = rsmi_dev_pci_id_get(dv_ind, &bdfid);
77 if (RSMI_STATUS_SUCCESS != ret) {
78 errno = EINVAL;
79 return -1;
80 }
81 domain = (bdfid>>32) & 0xffffffff;
82 bus = ((bdfid & 0xffff)>>8) & 0xff;
83 device = ((bdfid & 0xff)>>3) & 0x1f;
84
85 sprintf(path, "/sys/bus/pci/devices/%04x:%02x:%02x.0/local_cpus", domain, bus, device);
86 if (hwloc_linux_read_path_as_cpumask(path, set) < 0
87 || hwloc_bitmap_iszero(set))
88 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
89 #else
90 /* Non-Linux systems simply get a full cpuset */
91 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
92 #endif
93 return 0;
94 }
95
111 static __hwloc_inline hwloc_obj_t
112 hwloc_rsmi_get_device_osdev_by_index(hwloc_topology_t topology, uint32_t dv_ind)
113 {
114 hwloc_obj_t osdev = NULL;
115 while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
116 if (HWLOC_OBJ_OSDEV_GPU == osdev->attr->osdev.type
117 && osdev->name
118 && !strncmp("rsmi", osdev->name, 4)
119 && atoi(osdev->name + 4) == (int) dv_ind)
120 return osdev;
121 }
122 return NULL;
123 }
124
140 static __hwloc_inline hwloc_obj_t
141 hwloc_rsmi_get_device_osdev(hwloc_topology_t topology, uint32_t dv_ind)
142 {
143 hwloc_obj_t osdev;
144 rsmi_status_t ret;
145 uint64_t bdfid = 0;
146 unsigned domain, device, bus, func;
147 uint64_t id;
148 char uuid[64];
149
150 if (!hwloc_topology_is_thissystem(topology)) {
151 errno = EINVAL;
152 return NULL;
153 }
154
155 ret = rsmi_dev_pci_id_get(dv_ind, &bdfid);
156 if (RSMI_STATUS_SUCCESS != ret) {
157 errno = EINVAL;
158 return NULL;
159 }
160 domain = (bdfid>>32) & 0xffffffff;
161 bus = ((bdfid & 0xffff)>>8) & 0xff;
162 device = ((bdfid & 0xff)>>3) & 0x1f;
163 func = bdfid & 0x7;
164
165 ret = rsmi_dev_unique_id_get(dv_ind, &id);
166 if (RSMI_STATUS_SUCCESS != ret)
167 uuid[0] = '\0';
168 else
169 sprintf(uuid, "%lx", id);
170
171 osdev = NULL;
172 while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
173 hwloc_obj_t pcidev = osdev->parent;
174 const char *info;
175
176 if (strncmp(osdev->name, "rsmi", 4))
177 continue;
178
179 if (pcidev
180 && pcidev->type == HWLOC_OBJ_PCI_DEVICE
181 && pcidev->attr->pcidev.domain == domain
182 && pcidev->attr->pcidev.bus == bus
183 && pcidev->attr->pcidev.dev == device
184 && pcidev->attr->pcidev.func == func)
185 return osdev;
186
187 info = hwloc_obj_get_info_by_name(osdev, "AMDUUID");
188 if (info && !strcmp(info, uuid))
189 return osdev;
190 }
191
192 return NULL;
193 }
194
198 #ifdef __cplusplus
199 } /* extern "C" */
200 #endif
201
202
203 #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:140
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:342
HWLOC_OBJ_PCI_DEVICE
@ HWLOC_OBJ_PCI_DEVICE
PCI device (filtered out by default).
Definition: hwloc.h:269
hwloc_topology_t
struct hwloc_topology * hwloc_topology_t
Topology context.
Definition: hwloc.h:692
hwloc_obj_get_info_by_name
static const char * hwloc_obj_get_info_by_name(hwloc_obj_t obj, const char *name)
Search the given key 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
static 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:1194
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_osdev_by_index
static 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:112
hwloc_rsmi_get_device_osdev
static 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:141
hwloc_rsmi_get_device_cpuset
static 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:60
hwloc_obj
Structure of a topology object.
Definition: hwloc.h:396
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:408
hwloc_obj::type
hwloc_obj_type_t type
Type of object.
Definition: hwloc.h:398
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:415
hwloc_obj::parent
struct hwloc_obj * parent
Parent, NULL if root (Machine object)
Definition: hwloc.h:446
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
Definition: hwloc.h:639
hwloc_obj_attr_u::hwloc_pcidev_attr_s::func
unsigned char func
Definition: hwloc.h:639
hwloc_obj_attr_u::hwloc_pcidev_attr_s::domain
unsigned short domain
Definition: hwloc.h:635
hwloc_obj_attr_u::hwloc_pcidev_attr_s::bus
unsigned char bus
Definition: hwloc.h:639
hwloc_obj_attr_u::hwloc_osdev_attr_s::type
hwloc_obj_osdev_type_t type
Definition: hwloc.h:666