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Portable Hardware Locality (hwloc) Documentation: v2.3.0

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rsmi.h
1 /*
2  * Copyright © 2012-2020 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))
89 #else
90  /* Non-Linux systems simply get a full cpuset */
92 #endif
93  return 0;
94 }
95 
110 static __hwloc_inline hwloc_obj_t
112 {
113  hwloc_obj_t osdev = NULL;
114  while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
115  if (HWLOC_OBJ_OSDEV_GPU == osdev->attr->osdev.type
116  && osdev->name
117  && !strncmp("rsmi", osdev->name, 4)
118  && atoi(osdev->name + 4) == (int) dv_ind)
119  return osdev;
120  }
121  return NULL;
122 }
123 
138 static __hwloc_inline hwloc_obj_t
140 {
141  hwloc_obj_t osdev;
142  rsmi_status_t ret;
143  uint64_t bdfid = 0;
144  unsigned domain, device, bus, func;
145  uint64_t id;
146  char uuid[64];
147 
148  if (!hwloc_topology_is_thissystem(topology)) {
149  errno = EINVAL;
150  return NULL;
151  }
152 
153  ret = rsmi_dev_pci_id_get(dv_ind, &bdfid);
154  if (RSMI_STATUS_SUCCESS != ret) {
155  errno = EINVAL;
156  return NULL;
157  }
158  domain = (bdfid>>32) & 0xffffffff;
159  bus = ((bdfid & 0xffff)>>8) & 0xff;
160  device = ((bdfid & 0xff)>>3) & 0x1f;
161  func = bdfid & 0x7;
162 
163  ret = rsmi_dev_unique_id_get(dv_ind, &id);
164  if (RSMI_STATUS_SUCCESS != ret)
165  uuid[0] = '\0';
166  else
167  sprintf(uuid, "%lx", id);
168 
169  osdev = NULL;
170  while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
171  hwloc_obj_t pcidev = osdev->parent;
172  const char *info;
173 
174  if (strncmp(osdev->name, "rsmi", 4))
175  continue;
176 
177  if (pcidev
178  && pcidev->type == HWLOC_OBJ_PCI_DEVICE
179  && pcidev->attr->pcidev.domain == domain
180  && pcidev->attr->pcidev.bus == bus
181  && pcidev->attr->pcidev.dev == device
182  && pcidev->attr->pcidev.func == func)
183  return osdev;
184 
185  info = hwloc_obj_get_info_by_name(osdev, "AMDUUID");
186  if (info && !strcmp(info, uuid))
187  return osdev;
188  }
189 
190  return NULL;
191 }
192 
196 #ifdef __cplusplus
197 } /* extern "C" */
198 #endif
199 
200 
201 #endif /* HWLOC_RSMI_H */
hwloc_obj_type_t type
Type of object.
Definition: hwloc.h:397
unsigned char bus
Definition: hwloc.h:638
struct hwloc_obj_attr_u::hwloc_pcidev_attr_s pcidev
@ HWLOC_OBJ_PCI_DEVICE
PCI device (filtered out by default).
Definition: hwloc.h:269
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:111
struct hwloc_obj_attr_u::hwloc_osdev_attr_s osdev
struct hwloc_topology * hwloc_topology_t
Topology context.
Definition: hwloc.h:691
unsigned char dev
Definition: hwloc.h:638
unsigned short domain
Definition: hwloc.h:634
unsigned char func
Definition: hwloc.h:638
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
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:139
int hwloc_bitmap_iszero(hwloc_const_bitmap_t bitmap)
Test whether bitmap bitmap is empty.
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:1151
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
int hwloc_topology_is_thissystem(hwloc_topology_t restrict topology)
Does the topology context come from this system?
hwloc_obj_osdev_type_t type
Definition: hwloc.h:665
union hwloc_obj_attr_u * attr
Object type-specific Attributes, may be NULL if no attribute value was found.
Definition: hwloc.h:414
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.
char * name
Object-specific name if any. Mostly used for identifying OS devices and Misc objects where a name str...
Definition: hwloc.h:407
struct hwloc_obj * parent
Parent, NULL if root (Machine object)
Definition: hwloc.h:445
hwloc_const_cpuset_t hwloc_topology_get_complete_cpuset(hwloc_topology_t topology)
Get complete CPU set.
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.
Structure of a topology object.
Definition: hwloc.h:395
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_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