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Michael: Default driver loaded seems to be v5.15.2.  I'm pretty sure you need v5.16.0. Well, a host usually tries to run /reg/d/iocCommon/hosts/$HOSTNAME/startup.cmd to load drivers... but if that doesn't exist, it runs /reg/d/iocCommon/rhel7-x86_64/common/startup.cmd, which defines versions in kernel-module-dirs.cmd and loads them in kernel-modules.cmd.  So looking at the latter, it runs:

lspci_SLAC_pgp=`lspci -d 1a4a:2020 -n`

...

if [ "$lspci_SLAC_pgp" != "" ]; then

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	if [ -n "$SLAC_AES_DRIVER" -a -f $SLAC_AES_DRIVER/pgpcard.ko ];

...

 then
		echo Installing SLAC pgpcard driver: $SLAC_AES_DRIVER

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		rmmod pgpcard
		rmmod pgpcardG3
		insmod $SLAC_AES_DRIVER/pgpcard.ko cfgRxCount=256 cfgTxCount=64
		chmod 666 /dev/pgpcard*
	else
		echo SLAC pgpcard driver not found: $SLAC_AES_DRIVER/pgpcard.ko
	fi
else
	echo SLAC pgpcard device not found.
fi

where from the former:

# Select default SLAC_AES_DRIVER if not overridden
if [ "$SLAC_AES_DRIVER" == "" ];
then
	if [ "$SLAC_AES_VER" == "" ];
	then
		#SLAC_AES_VER=latest
		SLAC_AES_VER=v5.15.2
	fi
	SLAC_AES_DRIVER=$PACKAGE_SITE_TOP/slaclab/aes-stream-drivers/$SLAC_AES_VER/install/`uname -r`/
fi
export SLAC_AES_DRIVER

So... you don't necessarily want to change everyone... but you can create a host-specific startup file, and define SLAC_AES_VERSION to v5.16.0, and then s
ource the standard rhel7 file.gpcardG3

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# rmmod pgpcard
# rmmod pgpcardG3
# insmod /reg/g/pcds/package/slaclab/aes-stream-drivers/v5.16.0/install/`uname -r`/pgpcard.ko cfgRxCount=256 cfgTxCount=64
# chmod 666 /dev/pgpcard*

  5 hours ago
(I've just filled out all of the paths from the kernel*cmd files there. Image Removed) (edited) 
        insmod $SLAC_AES_DRIVER/pgpcard.ko cfgRxCount=256 cfgTxCount=64
        chmod 666 /dev/pgpcard*
    else
        echo SLAC pgpcard driver not found: $SLAC_AES_DRIVER/pgpcard.ko
    fi
else
    echo SLAC pgpcard device not found.
fi

Then either reboot, or manually install the new driver.  To manually start... stop all of the PGP IOCs, and then as root run:

# rmmod pgpcard
# rmmod pgpcardG3
# insmod /reg/g/pcds/package/slaclab/aes-stream-drivers/v5.16.0/install/`uname -r`/pgpcard.ko cfgRxCount=256 cfgTxCount=64
# chmod 666 /dev/pgpcard*

...

there.