+ linux-kselftest ML, Shuah Khan

On Wed, Nov 15, 2023 at 01:17:23PM +0100, Petr Machata wrote:

From: Ido Schimmel idosch@nvidia.com

Test that PCI reset works correctly by verifying that only the expected reset methods are supported and that after issuing the reset the ifindex of the port changes.

Signed-off-by: Ido Schimmel idosch@nvidia.com Reviewed-by: Petr Machata petrm@nvidia.com Signed-off-by: Petr Machata petrm@nvidia.com

Reviewed-by: Simon Horman horms@kernel.org

---

.../selftests/drivers/net/mlxsw/pci_reset.sh | 58 +++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100755 tools/testing/selftests/drivers/net/mlxsw/pci_reset.sh

diff --git a/tools/testing/selftests/drivers/net/mlxsw/pci_reset.sh b/tools/testing/selftests/drivers/net/mlxsw/pci_reset.sh new file mode 100755 index 000000000000..fe0343b95e6c --- /dev/null +++ b/tools/testing/selftests/drivers/net/mlxsw/pci_reset.sh @@ -0,0 +1,58 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Test that PCI reset works correctly by verifying that only the expected reset +# methods are supported and that after issuing the reset the ifindex of the +# port changes.

+lib_dir=$(dirname $0)/../../../net/forwarding

+ALL_TESTS="

• pci_reset_test

+" +NUM_NETIFS=1 +source $lib_dir/lib.sh +source $lib_dir/devlink_lib.sh

+pci_reset_test() +{

• RET=0
• local bus=$(echo $DEVLINK_DEV | cut -d '/' -f 1)
• local bdf=$(echo $DEVLINK_DEV | cut -d '/' -f 2)
• if [ $bus != "pci" ]; then

• check_err 1 "devlink device is not a PCI device"
  

• log_test "pci reset"
  

• return
  

• fi
• if [ ! -f /sys/bus/pci/devices/$bdf/reset_method ]; then

• check_err 1 "reset is not supported"
  

• log_test "pci reset"
  

• return
  

• fi
• [[ $(cat /sys/bus/pci/devices/$bdf/reset_method) == "bus" ]]
• check_err $? "only "bus" reset method should be supported"
• local ifindex_pre=$(ip -j link show dev $swp1 | jq '.[]["ifindex"]')
• echo 1 > /sys/bus/pci/devices/$bdf/reset
• check_err $? "reset failed"
• # Wait for udev to rename newly created netdev.
• udevadm settle
• local ifindex_post=$(ip -j link show dev $swp1 | jq '.[]["ifindex"]')
• [[ $ifindex_pre != $ifindex_post ]]
• check_err $? "reset not performed"
• log_test "pci reset"

+}

+swp1=${NETIFS[p1]} +tests_run

+exit $EXIT_STATUS

2.41.0