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setup.sh: for reset, just unbind if kernel driver is not loaded

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If the user did not have the ioatdma driver loaded for example,
when running "setup.sh reset", we should not load ioatdma so that
we can bind to it.  Instead just unbind the devices from the
uio/vfio driver.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I953941eb4918105b97ad78987b47b33f4372ae01

Reviewed-on: https://review.gerrithub.io/382474
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
This commit is contained in:
Jim Harris 2017-10-13 08:32:39 -07:00 committed by Daniel Verkamp
parent e5f69bb2ef
commit 1028372837
1 changed files with 37 additions and 4 deletions
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41
scripts/setup.sh
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@ -45,6 +45,21 @@ function linux_bind_driver() {
fi
}
function linux_unbind_driver() {
bdf="$1"
ven_dev_id=$(lspci -n -s $bdf | cut -d' ' -f3 | sed 's/:/ /')
if ! [ -e "/sys/bus/pci/devices/$bdf/driver" ]; then
return 0
fi
old_driver_name=$(basename $(readlink /sys/bus/pci/devices/$bdf/driver))
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"
echo "$bdf ($ven_dev_id): $old_driver_name -> no driver"
}
function linux_hugetlbfs_mount() {
mount | grep ' type hugetlbfs ' | awk '{ print $3 }'
}
@ -130,9 +145,16 @@ function configure_linux {
function reset_linux {
# NVMe
modprobe nvme || true
set +e
lsmod | grep nvme > /dev/null
driver_loaded=$?
set -e
for bdf in $(linux_iter_pci_class_code 0108); do
linux_bind_driver "$bdf" nvme
if [ $driver_loaded -eq 0 ]; then
linux_bind_driver "$bdf" nvme
else
linux_unbind_driver "$bdf"
fi
done
@ -142,10 +164,17 @@ function reset_linux {
grep "PCI_DEVICE_ID_INTEL_IOAT" $rootdir/include/spdk/pci_ids.h \
| awk -F"x" '{print $2}' > $TMP
modprobe ioatdma || true
set +e
lsmod | grep ioatdma > /dev/null
driver_loaded=$?
set -e
for dev_id in `cat $TMP`; do
for bdf in $(linux_iter_pci_dev_id 8086 $dev_id); do
linux_bind_driver "$bdf" ioatdma
if [ $driver_loaded -eq 0 ]; then
linux_bind_driver "$bdf" ioatdma
else
linux_unbind_driver "$bdf"
fi
done
done
rm $TMP
@ -156,6 +185,10 @@ function reset_linux {
grep "VIRTIO_PCI_DEVICEID_SCSI" $rootdir/lib/bdev/virtio/rte_virtio/virtio_pci.h \
| awk -F"x" '{print $2}' > $TMP
# TODO: check if virtio-pci is loaded first and just unbind if it is not loaded
# Requires some more investigation - for example, some kernels do not seem to have
# virtio-pci but just virtio_scsi instead. Also need to make sure we get the
# underscore vs. dash right in the virtio_scsi name.
modprobe virtio-pci || true
for dev_id in `cat $TMP`; do
for bdf in $(linux_iter_pci_dev_id 1af4 $dev_id); do