smp_write_gpio man page on Fedora
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SMP_WRITE_GPIO(8) SMP_UTILS SMP_WRITE_GPIO(8)
NAME
smp_write_gpio - invoke WRITE GPIO REGISTER (ENHANCED) 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 or a WRITE
GPIO REGISTER ENHANCED function request 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. The mpt
interface uses SMP_DEVICE to identify a HBA (an SMP initiator) and
needs the additional ,N to differentiate between HBAs if there are mul‐
tiple present.
This function is defined in SFF-8485 ( see www.sffcommittee.com )
together with its corresponding READ GPIO REGISTER (ENHANCED) SMP func‐
tion. 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 manipu‐
late the sideband signals in wide internal cables. To stop other ini‐
tiators in a multi-initiator domain from accessing those sideband sig‐
nals, the virtual SMP (target) port is not indicated in a DISCOVER
response.
In SAS-2 this function was made obsolete and seemingly replaced by a
function called WRITE GPIO REGISTER ENHANCED with a reference to the
same SFF document. However the author can find no version of SFF-8485
that defines the WRITE GPIO REGISTER ENHANCED function. In SAS-2.1 both
the WRITE GPIO REGISTER and WRITE GPIO REGISTER ENHANCED functions were
dropped.
OPTIONS
Mandatory arguments to long options are mandatory for short options as
well.
-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 separators.
-E, --enhanced
sends a WRITE GPIO REGISTER ENHANCED function request (default:
send a WRITE GPIO REGISTER function request).
-h, --help
output the usage message then exit.
-H, --hex
output the response (less the CRC field) 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 regis‐
ters 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 (less the CRC field) 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 REGIS‐
TER SMP function.
AUTHORS
Written by Douglas Gilbert.
REPORTING BUGS
Report bugs to <dgilbert at interlog dot com>.
COPYRIGHT
Copyright © 2006-2011 Douglas Gilbert
This software is distributed under a FreeBSD license. There is NO war‐
ranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR‐
POSE.
SEE ALSO
smp_utils, smp_read_gpio(smp_utils)
smp_utils-0.96 June 2011 SMP_WRITE_GPIO(8)
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