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#! /bin/bash
BAR=0
function pci {
PCILIB_PATH=`pwd`/..
LD_LIBRARY_PATH="$PCILIB_PATH/pcilib" $PCILIB_PATH/pcitool/pci $*
}
function read_cfg {
pci -a config -r 0x$1 | awk '{ print $2; }' | sed -e 's/\s*//g' -e '/^\s*$/d'
}
function parse_config {
info=0x`pci -b $BAR -r 0 | awk '{ print $2; }' | sed -e 's/\s*//g' -e '/^\s*$/d'`
model=`printf "%X" $((info>>24))`
if [ $model -eq 14 ]; then
model="Xilinx Virtex-6"
else
model="Xilinx $model"
fi
version=$(((info >> 8) & 0xFF))
data_width=$((16 * (2 ** ((info >> 16) & 0xF))))
echo "$model, build $version, $data_width bits"
next=`read_cfg 34 | cut -c 7-8`
# next=`printf "%u" $next`
while [ $((0x$next)) -ne 0 ]; do
cap=`read_cfg $next`
capid=`echo $cap | cut -c 7-8`
if [ $capid -eq 10 ]; then
addr=`printf "%X" $((0x$next + 4))`
device_capabilities=`read_cfg $addr`
addr=`printf "%X" $((0x$next + 8))`
device_control=`read_cfg $addr`
addr=`printf "%X" $((0x$next + 12))`
pcie_link1=`read_cfg $addr`
addr=`printf "%X" $((0x$next + 16))`
pcie_link2=`read_cfg $addr`
link_speed=$((((0x$pcie_link2 & 0xF0000) >> 16)))
link_width=$((((0x$pcie_link2 & 0x3F00000) >> 20)))
dev_link_speed=$((((0x$pcie_link1 & 0xF))))
dev_link_width=$((((0x$pcie_link1 & 0x3F0) >> 4)))
max_payload=$(((1 << ((0x$device_capabilities & 0x07) + 7))))
dev_payload=$(((1 << (((0x$device_capabilities >> 5) & 0x07) + 7))))
fi
next=`echo $cap | cut -c 5-6`
done
echo "Link: PCIe gen$link_speed x$link_width"
if [ $link_speed -ne $dev_link_speed -o $link_width -ne $dev_link_width ]; then
echo " * But device capable of gen$dev_link_speed x$dev_link_width"
fi
echo "Payload: $dev_payload"
if [ $dev_payload -ne $max_payload ]; then
echo " * But device capable of $max_payload"
fi
info=0x`read_cfg 40`
max_tlp=$((2 ** (5 + ((info & 0xE0) >> 5))))
echo "TLP: 32 dwords (transfering 32 TLP per request)"
if [ $max_tlp -ne 32 ]; then
echo " * But device is able to transfer TLP up to $max_tlp bytes"
fi
# 2500 MT/s, but PCIe gen1 and gen2 uses 10 bit encoding
speed=$((link_width * link_speed * 2500 / 10))
}
parse_config
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