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corundum/scripts/pcie_hot_reset.sh
Alex Forencich ffc0a70c40 Update scripts to use setpci built-in bit masking
Signed-off-by: Alex Forencich <alex@alexforencich.com>
2022-04-19 23:18:50 -07:00

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#!/bin/bash
dev=$1
if [ -z "$dev" ]; then
echo "Error: no device specified"
exit 1
fi
if [ ! -e "/sys/bus/pci/devices/$dev" ]; then
dev="0000:$dev"
fi
if [ ! -e "/sys/bus/pci/devices/$dev" ]; then
echo "Error: device $dev not found"
exit 1
fi
port=$(basename $(dirname $(readlink "/sys/bus/pci/devices/$dev")))
if [ ! -e "/sys/bus/pci/devices/$port" ]; then
echo "Error: device $port not found"
exit 1
fi
echo "Removing $dev..."
echo 1 > "/sys/bus/pci/devices/$dev/remove"
echo "Performing hot reset of port $port..."
echo "Bridge control:" $(setpci -s $port BRIDGE_CONTROL)
setpci -s $port BRIDGE_CONTROL=40:40
sleep 0.5
setpci -s $port BRIDGE_CONTROL=00:40
sleep 0.5
echo "Rescanning bus..."
if [ -e "/sys/bus/pci/devices/$port/dev_rescan" ]; then
echo 1 > "/sys/bus/pci/devices/$port/dev_rescan"
else
echo 1 > "/sys/bus/pci/devices/$port/rescan"
fi