NAME

       fi_nic - Fabric network interface card attributes

NETWORK INTERFACE CARD ATTRIBUTES

       The fid_nic structure defines attributes for a struct fi_info that is directly associated with underlying
       networking  hardware  and may be returned directly from calling fi_getinfo(3).  The format of fid_nic and
       the related substructures are defined below.

       Note that not all fields of all structures may be available.  Unavailable or fields that are not applica‐
       ble to the indicated device will be set to NULL or 0.

              struct fid_nic {
                  struct fid             fid;
                  struct fi_device_attr *device_attr;
                  struct fi_bus_attr    *bus_attr;
                  struct fi_link_attr   *link_attr;
                  void                  *prov_attr;
              };

              struct fi_device_attr {
                  char *name;
                  char *device_id;
                  char *device_version;
                  char *vendor_id;
                  char *driver;
                  char *firmware;
              };

              struct fi_pci_attr {
                  uint16_t domain_id;
                  uint8_t  bus_id;
                  uint8_t  device_id;
                  uint8_t  function_id;
              };

              struct fi_bus_attr {
                  enum fi_bus_type       bus_type;
                  union {
                      struct fi_pci_attr pci;
                  } attr;
              };

              struct fi_link_attr {
                  char               *address;
                  size_t             mtu;
                  size_t             speed;
                  enum fi_link_state state;
                  char               *network_type;
              };

   Device Attributes
       Device attributes are used to identify the specific virtual or hardware NIC associated  with  an  fi_info
       structure.

       name   The  operating  system  name  associated with the device.  This may be a logical network interface
              name (e.g. eth0 or eno1) or an absolute filename.

       device_id
              This is a vendor specific identifier for the device or product.

       device_version
              Indicates the version of the device.

       vendor_id
              Indicates the name of the vendor that distributes the NIC.

       driver The name of the driver associated with the device

       firmware
              The device’s firmware version.

   Bus Attributes
       The bus attributes are used to identify the physical location of the NIC in the system.

       bus_type
              Indicates the type of system bus where the  NIC  is  located.   Valid  values  are  FI_BUS_PCI  or
              FI_BUS_UNKNOWN.

       attr.pci.domain_id
              The domain where the PCI bus is located.  Valid only if bus_type is FI_BUS_PCI.

       attr.pci.bus_id
              The PCI bus identifier where the device is located.  Valid only if bus_type is FI_BUS_PCI.

       attr.pci.device_id
              The identifier on the PCI bus where the device is located.  Valid only if bus_type is FI_BUS_PCI.

       attr.pci.function_id
              The function on the device being referenced.  Valid only if bus_type is FI_BUS_PCI.

   Link Attributes
       Link attributes describe low-level details about the network connection into the fabric.

       address
              The  primary  link-level  address associated with the NIC, such as a MAC address.  If multiple ad‐
              dresses are available, only one will be reported.

       mtu    The maximum transfer unit of link level frames or packets, in bytes.

       speed  The active link data rate, given in bits per second.

       state  The  current  physical  port  state.   Possible  values  are  FI_LINK_UNKNOWN,  FI_LINK_DOWN,  and
              FI_LINK_UP, to indicate if the port state is unknown or not applicable (unknown), inactive (down),
              or active (up).

       network_type
              Specifies the type of network interface currently active, such as Ethernet or InfiniBand.

   Provider Attributes
       Provider  attributes  reference  provider  specific  details  of  the  device.  These attributes are both
       provider and device specific.  The attributes can be interpreted by fi_tostr(3).  Applications  may  also
       use  the  other attribute fields, such as related fi_fabric_attr: prov_name field, to determine an appro‐
       priate structure to cast the attributes.  The format and definition of this field is outside the scope of
       the libfabric core framework, but may be available as part of a provider specific  header  file  included
       with libfabric package.

NOTES

       The  fid_nic structure is returned as part of a call to fi_getinfo(3).  It is automatically freed as part
       of calling fi_freeinfo(3)

SEE ALSO

       fi_getinfo(3)

AUTHORS

       OpenFabrics.

Libfabric Programmer’s Manual                      2022-12-11                                          fi_nic(3)