SMP_WRITE_GPIO(8)                                           SMP_UTILS                                          SMP_WRITE_GPIO(8)



NAME
       smp_write_gpio - invoke WRITE GPIO REGISTER SMP function

SYNOPSIS
       smp_write_gpio  [--count=CO]  [--data=H,H...]  [--help] [--hex] [--index=IN] [--interface=PARAMS] [--raw] [--sa=SAS_ADDR]
       [--type=TY] [--verbose] [--version] SMP_DEVICE[,N]

DESCRIPTION
       Sends a SAS Management Protocol (SMP) WRITE GPIO REGISTER request function to a SMP target. The SMP target is  identified
       by the SMP_DEVICE and the SAS_ADDR. Depending on the interface, the SAS_ADDR may be deduced from the SMP_DEVICE. With one
       interface there is one SMP_DEVICE per machine so the SMP_DEVICE,N syntax is needed to differentiate between HBAs if there
       are multiple present.

       This  function is defined in SFF-8485 ( see www.sffcommittee.com ) together with its corresponding READ GPIO REGISTER SMP
       function.  The other SMP functions are defined in SAS documents at www.t10.org  .   SFF-8485  defines  a  curious  device
       called  a  "virtual SMP port" that lives in a host bus adapter (HBA) and allows SMP to manipulate the sideband signals in
       wide internal cables. To stop other initiators in a multi-initiator domain from accessing  those  sideband  signals,  the
       virtual SMP (target) port is not indicated in a DISCOVER response.

       -c, --count=CO
              where CO is the register count. This is the number of (4 byte) registers to send. The default value is 1.

       -d, --data=H,H...
              this  option  supplies  a comma separated list of hexadecimal bytes (0 to ff inclusive) that will be used as write
              data in the WRITE GPIO REGISTER request. The number of bytes supplied should be four times --count=C The  first  4
              bytes will become the first register written.

       -d, --data=-
              reads  string  of  hexadecimal bytes from stdin. Spaces, tabs and line feeds additionally are permitted as separa-
              tors.

       -h, --help
              output the usage message then exit.

       -H, --hex
              output the response in hexadecimal.

       -i, --index=IN
              where IN is the register index. This value is origin zero and its default  value  is  0.  The  request  will  send
              --count=CO registers starting from --index=IN of the given --type=TY.

       -I, --interface=PARAMS
              interface specific parameters. In this case "interface" refers to the path through the operating system to the SMP
              initiator. See the smp_utils man page for more information.

       -r, --raw
              send the response to stdout in binary. All error messages are sent to stderr.

       -s, --sa=SAS_ADDR
              specifies the SAS address of the SMP target device. Typically this is an expander. This option may not  be  needed
              if  the  SMP_DEVICE  has the target's SAS address within it. The SAS_ADDR is in decimal but most SAS addresses are
              shown in hexadecimal. To give a number in hexadecimal either prefix it with '0x' or put a trailing 'h' on it.

       -t, --type=TY
              where TY is the register type. The default value is 0 (GPIO_CFG).  The  request  will  send  --count=CO  registers
              starting from --index=IN of the given --type=TY.

       -v, --verbose
              increase the verbosity of the output. Can be used multiple times.

       -V, --version
              print the version string and then exit.

CONFORMING TO
       The  SMP  WRITE GPIO REGISTER function is defined in SFF-8485 (see www.sffcommittee.com ) together with its corresponding
       READ GPIO REGISTER SMP function.

AUTHORS
       Written by Douglas Gilbert.

REPORTING BUGS
       Report bugs to <dgilbert at interlog dot com>.

COPYRIGHT
       Copyright (C) 2006-2008 Douglas Gilbert
       This software is distributed under a FreeBSD license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
       PARTICULAR PURPOSE.

SEE ALSO
       smp_utils, smp_read_gpio(smp_utils)



smp_utils-0.93                                            January 2008                                         SMP_WRITE_GPIO(8)