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SMP_READ_GPIO

Section: SMP_UTILS (8)
Updated: January 2008
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NAME

smp_read_gpio - invoke READ GPIO REGISTER SMP function  

SYNOPSIS

smp_read_gpio [--count=CO] [--help] [--hex] [--index=IN] [--interface=PARAMS] [--raw] [--sa=SAS_ADDR] [--type=TY] [--verbose] [--version] 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 virtual 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 REGISTER 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 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

SEE ALSO

smp_utils, smp_write_gpio(smp_utils)

 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
CONFORMING TO
AUTHORS
REPORTING BUGS
COPYRIGHT
SEE ALSO
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Time: 05:34:30 GMT, December 24, 2015