Components and Plugins: PCI functions to be used by components(3)

NAME
Components and Plugins: PCI functions to be used by components -

  Functions
int hwloc_insert_pci_device_list (struct hwloc_backend *backend, struct hwloc_obj *first_obj)
unsigned hwloc_pci_find_cap (const unsigned char *config, unsigned cap)
int hwloc_pci_find_linkspeed (const unsigned char *config, unsigned offset, float *linkspeed)
int hwloc_pci_prepare_bridge (hwloc_obj_t obj, const unsigned char *config)

Detailed Description

Function Documentation

  int hwloc_insert_pci_device_list (struct hwloc_backend *backend, struct hwloc_obj *first_obj)

Insert a list of PCI devices and bridges in the backend topology. Insert a list of objects (either PCI device or bridges) starting at first_obj (linked by next_sibling in the topology, and ending with NULL). Objects are placed under the right bridges, and the remaining upstream bridges are then inserted in the topology by calling the get_obj_cpuset() callback to find their locality.

  unsigned hwloc_pci_find_cap (const unsigned char *config, unsignedcap)

Return the offset of the given capability in the PCI config space buffer. This function requires a 256-bytes config space. Unknown/unavailable bytes should be set to 0xff.

  int hwloc_pci_find_linkspeed (const unsigned char *config, unsignedoffset, float *linkspeed)

Fill linkspeed by reading the PCI config space where PCI_CAP_ID_EXP is at position offset. Needs 20 bytes of EXP capability block starting at offset in the config space for registers up to link status.

  int hwloc_pci_prepare_bridge (hwloc_obj_tobj, const unsigned char *config)

Modify the PCI device object into a bridge and fill its attribute if a bridge is found in the PCI config space. This function requires 64 bytes of common configuration header at the beginning of config.

Author

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