mirror of
https://github.com/corundum/corundum.git
synced 2025-02-06 08:38:23 +08:00
50 lines
1011 B
Bash
50 lines
1011 B
Bash
|
#!/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 [[ $port != pci* ]]; then
|
||
|
|
echo "Note: it may be necessary to run this on the corresponding upstream port"
|
||
|
|
echo "Device $dev is connected to upstream port $port"
|
||
|
|
fi
|
||
|
|
|
||
|
|
echo "Configuring $dev..."
|
||
|
|
|
||
|
|
lc2=$(setpci -s $dev CAP_EXP+30.L)
|
||
|
|
|
||
|
|
echo "Original link control 2:" $lc2
|
||
|
|
echo "Original link target speed:" $(("0x$lc2" & 0xF))
|
||
|
|
|
||
|
|
lc2n=$(printf "%08x" $((("0x$lc2" & 0xFFFFFFF0) | 0x2)))
|
||
|
|
|
||
|
|
echo "New link control 2:" $lc2n
|
||
|
|
|
||
|
|
setpci -s $dev CAP_EXP+30.L=$lc2n
|
||
|
|
|
||
|
|
echo "Triggering link retraining..."
|
||
|
|
|
||
|
|
lc=$(setpci -s $dev CAP_EXP+10.L)
|
||
|
|
|
||
|
|
echo "Original link control:" $lc
|
||
|
|
|
||
|
|
lcn=$(printf "%08x" $(("0x$lc" | 0x20)))
|
||
|
|
|
||
|
|
echo "New link control:" $lcn
|
||
|
|
|
||
|
|
setpci -s $dev CAP_EXP+10.L=$lcn
|