smp_read_gpio man page on Scientific
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SMP_READ_GPIO(8) SMP_UTILS SMP_READ_GPIO(8)
NAME
smp_read_gpio - invoke READ GPIO REGISTER SMP function
SYNOPSIS
smp_read_gpio [--count=CO] [--help] [--hex] [--index=IN] [--inter‐
face=PARAMS] [--raw] [--sa=SAS_ADDR] [--type=TY] [--verbose] [--ver‐
sion] SMP_DEVICE[,N]
DESCRIPTION
Sends a SAS Management Protocol (SMP) READ GPIO REGISTER 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. 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 WRITE 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 on wide internal cables. To stop other initiators in a
multi-initiator domain from accessing those sideband signals, the vir‐
tual SMP (target) port is not indicated in a DISCOVER response.
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 request. The default value is 1.
-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. If the request succeeds, then --count=CO
registers starting from --index=IN of the given --type=TY should
be in the response.
-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). If the request succeeds, then --count=CO registers
starting from --index=IN of the given --type=TY should be in the
response.
-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 READ GPIO REGISTER function is defined in SFF-8485 (see
www.sffcommittee.com ) together with its corresponding WRITE GPIO REG‐
ISTER SMP function.
AUTHORS
Written by Douglas Gilbert.
REPORTING BUGS
Report bugs to <dgilbert at interlog dot com>.
COPYRIGHT
Copyright © 2006-2008 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_write_gpio(smp_utils)
smp_utils-0.93 January 2008 SMP_READ_GPIO(8)
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