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setup.sh: factor out Linux driver binding

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Change-Id: I7d0d919bc8b2ffbc8856648fe746468d9b9f6702
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This commit is contained in:
Daniel Verkamp 2016-04-14 12:21:32 -07:00
parent b2047c2b4a
commit 21173cd036
1 changed files with 27 additions and 36 deletions
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63
scripts/setup.sh
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@ -11,6 +11,29 @@ function linux_iter_pci {
lspci -mm -n | grep $1 | tr -d '"' | awk -F " " '{print "0000:"$1}' lspci -mm -n | grep $1 | tr -d '"' | awk -F " " '{print "0000:"$1}'
} }
function linux_bind_driver() {
bdf="$1"
driver_name="$2"
old_driver_name="no driver"
ven_dev_id=$(lspci -n -s $bdf | cut -d' ' -f3 | sed 's/:/ /')
if [ -e "/sys/bus/pci/devices/$bdf/driver" ]; then
old_driver_name=$(basename $(readlink /sys/bus/pci/devices/$bdf/driver))
if [ "$driver_name" = "$old_driver_name" ]; then
return 0
fi
echo "$ven_dev_id" > "/sys/bus/pci/devices/$bdf/driver/remove_id" 2> /dev/null || true
echo "$bdf" > "/sys/bus/pci/devices/$bdf/driver/unbind"
fi
echo "$bdf ($ven_dev_id): $old_driver_name -> $driver_name"
echo "$ven_dev_id" > "/sys/bus/pci/drivers/$driver_name/new_id" 2> /dev/null || true
echo "$bdf" > "/sys/bus/pci/drivers/$driver_name/bind" 2> /dev/null || true
}
function configure_linux { function configure_linux {
driver_name=vfio-pci driver_name=vfio-pci
if [ -z "$(ls /sys/kernel/iommu_groups)" ]; then if [ -z "$(ls /sys/kernel/iommu_groups)" ]; then
@ -21,14 +44,7 @@ function configure_linux {
# NVMe # NVMe
modprobe $driver_name || true modprobe $driver_name || true
for bdf in $(linux_iter_pci 0108); do for bdf in $(linux_iter_pci 0108); do
if [ -e "/sys/bus/pci/devices/$bdf/driver" ]; then linux_bind_driver "$bdf" "$driver_name"
# Unbind the device from whatever driver it is currently bound to
echo $bdf > "/sys/bus/pci/devices/$bdf/driver/unbind"
fi
# Bind this device to the new driver
ven_dev_id=$(lspci -n -s $bdf | cut -d' ' -f3 | sed 's/:/ /')
echo "Binding $bdf ($ven_dev_id) to $driver_name"
echo $ven_dev_id > "/sys/bus/pci/drivers/$driver_name/new_id"
done done
@ -41,14 +57,7 @@ function configure_linux {
for dev_id in `cat $TMP`; do for dev_id in `cat $TMP`; do
# Abuse linux_iter_pci by giving it a device ID instead of a class code # Abuse linux_iter_pci by giving it a device ID instead of a class code
for bdf in $(linux_iter_pci $dev_id); do for bdf in $(linux_iter_pci $dev_id); do
if [ -e "/sys/bus/pci/devices/$bdf/driver" ]; then linux_bind_driver "$bdf" "$driver_name"
# Unbind the device from whatever driver it is currently bound to
echo $bdf > "/sys/bus/pci/devices/$bdf/driver/unbind"
fi
# Bind this device to the new driver
ven_dev_id=$(lspci -n -s $bdf | cut -d' ' -f3 | sed 's/:/ /')
echo "Binding $bdf ($ven_dev_id) to $driver_name"
echo $ven_dev_id > "/sys/bus/pci/drivers/$driver_name/new_id"
done done
done done
rm $TMP rm $TMP
@ -60,16 +69,7 @@ function reset_linux {
# NVMe # NVMe
modprobe nvme || true modprobe nvme || true
for bdf in $(linux_iter_pci 0108); do for bdf in $(linux_iter_pci 0108); do
ven_dev_id=$(lspci -n -s $bdf | cut -d' ' -f3 | sed 's/:/ /') linux_bind_driver "$bdf" nvme
if [ -e "/sys/bus/pci/devices/$bdf/driver" ]; then
# Unregister this device from the driver it was bound to.
echo $ven_dev_id > "/sys/bus/pci/devices/$bdf/driver/remove_id"
# Unbind the device from whatever driver it is currently bound to
echo $bdf > "/sys/bus/pci/devices/$bdf/driver/unbind"
fi
# Bind this device back to the nvme driver
echo "Binding $bdf ($ven_dev_id) to nvme"
echo $bdf > "/sys/bus/pci/drivers/nvme/bind"
done done
@ -83,16 +83,7 @@ function reset_linux {
for dev_id in `cat $TMP`; do for dev_id in `cat $TMP`; do
# Abuse linux_iter_pci by giving it a device ID instead of a class code # Abuse linux_iter_pci by giving it a device ID instead of a class code
for bdf in $(linux_iter_pci $dev_id); do for bdf in $(linux_iter_pci $dev_id); do
ven_dev_id=$(lspci -n -s $bdf | cut -d' ' -f3 | sed 's/:/ /') linux_bind_driver "$bdf" ioatdma
if [ -e "/sys/bus/pci/devices/$bdf/driver" ]; then
# Unregister this device from the driver it was bound to.
echo $ven_dev_id > "/sys/bus/pci/devices/$bdf/driver/remove_id"
# Unbind the device from whatever driver it is currently bound to
echo $bdf > "/sys/bus/pci/devices/$bdf/driver/unbind"
fi
# Bind this device back to the nvme driver
echo "Binding $bdf ($ven_dev_id) to ioatdma"
echo $bdf > "/sys/bus/pci/drivers/ioatdma/bind"
done done
done done
rm $TMP rm $TMP