NAME

       umad_open_port - open InfiniBand device port for umad access

SYNOPSIS

       #include <infiniband/umad.h>

       int umad_open_port(char *ca_name, int portnum);

DESCRIPTION

       umad_open_port() opens the port portnum of the IB device ca_name for umad access. The port
       is selected by the library if not all parameters are  provided  (see  umad_get_port()  for
       details).

RETURN VALUE

       umad_open_port()  returns  0  or  an  unique  positive  value of umad device descriptor on
       success, and a negative value on error as follows:
        -EOPNOTSUPP ABI version doesn't match
        -ENODEV     IB device can't be resolved
        -EINVAL     port is not valid (bad portnum or no umad device)
        -EIO        umad device for this port can't be opened

SEE ALSO

       umad_close_port(3), umad_get_cas_names(3), umad_get_port(3)

AUTHOR

       Hal Rosenstock <halr@voltaire.com>