Add selftest file for the link layer tests of a NIC driver.
Test for auto-negotiation is added.
Add LinkConfig class for changing link layer configs.
Selftest makes use of ksft modules and ethtool.
Include selftest file in the Makefile.
Signed-off-by: Mohan Prasad J <mohan.prasad@xxxxxxxxxxxxx>
---
.../testing/selftests/drivers/net/hw/Makefile | 1 +
.../drivers/net/hw/lib/py/__init__.py | 1 +
.../drivers/net/hw/lib/py/linkconfig.py | 220 ++++++++++++++++++
.../drivers/net/hw/nic_link_layer.py | 84 +++++++
4 files changed, 306 insertions(+)
create mode 100644 tools/testing/selftests/drivers/net/hw/lib/py/linkconfig.py
create mode 100644 tools/testing/selftests/drivers/net/hw/nic_link_layer.py
diff --git a/tools/testing/selftests/drivers/net/hw/Makefile b/tools/testing/selftests/drivers/net/hw/Makefile
index c9f2f48fc..0dac40c4e 100644
--- a/tools/testing/selftests/drivers/net/hw/Makefile
+++ b/tools/testing/selftests/drivers/net/hw/Makefile
@@ -10,6 +10,7 @@ TEST_PROGS = \
hw_stats_l3.sh \
hw_stats_l3_gre.sh \
loopback.sh \
+ nic_link_layer.py \
pp_alloc_fail.py \
rss_ctx.py \
#
diff --git a/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py b/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py
index b58288578..399789a96 100644
--- a/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py
+++ b/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py
@@ -9,6 +9,7 @@ try:
sys.path.append(KSFT_DIR.as_posix())
from net.lib.py import *
from drivers.net.lib.py import *
+ from .linkconfig import LinkConfig
except ModuleNotFoundError as e:
ksft_pr("Failed importing `net` library from kernel sources")
ksft_pr(str(e))
diff --git a/tools/testing/selftests/drivers/net/hw/lib/py/linkconfig.py b/tools/testing/selftests/drivers/net/hw/lib/py/linkconfig.py
new file mode 100644
index 000000000..86cbf10a3
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/hw/lib/py/linkconfig.py
@@ -0,0 +1,220 @@
+# SPDX-License-Identifier: GPL-2.0
+
+from lib.py import cmd
+from lib.py import ethtool
+from lib.py import ksft_pr, ksft_eq
+import re
+import time
+import json
+
+#The LinkConfig class is implemented to handle the link layer configurations.
+#Required minimum ethtool version is 6.10
+#The ethtool and ip would require authentication to make changes, so better
+# to check them for sudo privileges for interruption free testing.
+
+class LinkConfig:
+ """Class for handling the link layer configurations"""
+ def __init__(self, cfg):
+ self.cfg = cfg
+ self.partner_netif = self.get_partner_netif_name()
+
+ """Get the initial link configuration of local interface"""
+ self.common_link_modes = self.get_common_link_modes()
+
+ def get_partner_netif_name(self):
+ partner_netif = None
+ try:
+ """Get partner interface name"""
+ partner_cmd = f"ip -o -f inet addr show | grep '{self.cfg.remote_addr}' " + "| awk '{print $2}'"
+ partner_output = cmd(partner_cmd, host=self.cfg.remote)
+ partner_netif = partner_output.stdout.strip()
+ ksft_pr(f"Partner Interface name: {partner_netif}")
+ except Exception as e:
+ print(f"Unexpected error occurred: {e}")
+ self.partner_netif = partner_netif
+ return partner_netif
+
+ def verify_link_up(self):
+ """Verify whether the local interface link is up"""
+ with open(f"/sys/class/net/{self.cfg.ifname}/operstate", "r") as fp:
+ link_state = fp.read().strip()
+
+ if link_state == "down":
+ ksft_pr(f"Link state of interface {self.cfg.ifname} is DOWN")
+ return False
+ else:
+ return True
+
+ def reset_interface(self, local=True, remote=True):
+ ksft_pr("Resetting interfaces in local and remote")
+ if remote:
+ if self.partner_netif is not None:
+ ifname = self.partner_netif
+ link_up_cmd = f"sudo ip link set up {ifname}"
+ link_down_cmd = f"sudo ip link set down {ifname}"
+ reset_cmd = f"{link_down_cmd} && sleep 5 && {link_up_cmd}"
+ try:
+ cmd(f"{reset_cmd}", host=self.cfg.remote)
+ except Exception as e:
+ ksft_pr("Check sudo permission for ip command")
+ ksft_pr(f"Unexpected error occurred: {e}")
+ else:
+ ksft_pr("Partner interface not available")
+ if local:
+ ifname = self.cfg.ifname
+ link_up_cmd = f"sudo ip link set up {ifname}"
+ link_down_cmd = f"sudo ip link set down {ifname}"
+ reset_cmd = f"{link_down_cmd} && sleep 5 && {link_up_cmd}"
+ try:
+ cmd(f"{reset_cmd}")
+ except Exception as e:
+ ksft_pr("Check sudo permission for ip command")
+ ksft_pr(f"Unexpected error occurred: {e}")
+ time.sleep(10)
+ if self.verify_link_up() and self.get_ethtool_field("link-detected"):
+ ksft_pr("Local and remote interfaces reset to original state")
+ return True
+ else:
+ return False
+
+ def set_speed_and_duplex(self, speed: str, duplex: str, autoneg=True):
+ """Set the speed and duplex state for the interface"""
+ autoneg_state = "on" if autoneg is True else "off"
+ process = None
+ try:
+ process = ethtool(f"--change {self.cfg.ifname} speed {speed} duplex {duplex} autoneg {autoneg_state}")
+ except Exception as e:
+ ksft_pr(f"Unexpected error occurred: {e}")
+ if process is None or process.ret != 0:
+ return False
+ else:
+ ksft_pr(f"Speed: {speed} Mbps, Duplex: {duplex} set for Interface: {self.cfg.ifname}")
+ return True
+
+ def verify_speed_and_duplex(self, expected_speed: str, expected_duplex: str):
+ if self.verify_link_up() == False:
+ return False
+ """Verifying the speed and duplex state for the interface"""
+ with open(f"/sys/class/net/{self.cfg.ifname}/speed", "r") as fp:
+ actual_speed = fp.read().strip()
+ with open(f"/sys/class/net/{self.cfg.ifname}/duplex", "r") as fp:
+ actual_duplex = fp.read().strip()
+
+ ksft_eq(actual_speed, expected_speed)
+ ksft_eq(actual_duplex, expected_duplex)
+ return True
+
+ def set_autonegotiation_state(self, state: str, remote=False):
+ common_link_modes = self.common_link_modes
+ speeds, duplex_modes = self.get_speed_duplex_values(self.common_link_modes)
+ speed = speeds[0]
+ duplex = duplex_modes[0]
+ if not speed or not duplex:
+ ksft_pr("No speed or duplex modes found")
+ return False
+
+ speed_duplex_cmd = f"speed {speed} duplex {duplex}" if state == "off" else ""
+ if remote==True:
+ """Set the autonegotiation state for the partner"""
+ command = f"sudo ethtool -s {self.partner_netif} {speed_duplex_cmd} autoneg {state}"
+ partner_autoneg_change = None
+ """Set autonegotiation state for interface in remote pc"""
+ try:
+ partner_autoneg_change = cmd(command, host=self.cfg.remote)
+ except Exception as e:
+ ksft_pr("Check sudo permission for ethtool")
+ ksft_pr(f"Unexpected error occurred: {e}")
+ if partner_autoneg_change is None or partner_autoneg_change.ret != 0:
+ ksft_pr(f"Not able to set autoneg parameter for interface {self.partner_netif}. Check permissions for ethtool.")
+ return False
+ ksft_pr(f"Autoneg set as {state} for {self.partner_netif}")
+ else:
+ process = None
+ """Set the autonegotiation state for the interface"""
+ try:
+ process = ethtool(f"-s {self.cfg.ifname} {speed_duplex_cmd} autoneg {state}")
+ except Exception as e:
+ ksft_pr("Check sudo permission for ethtool")
+ ksft_pr(f"Unexpected error occurred: {e}")
+ if process is None or process.ret != 0:
+ ksft_pr(f"Not able to set autoneg parameter for interface {self.cfg.ifname}")
+ return False
+ ksft_pr(f"Autoneg set as {state} for {self.cfg.ifname}")
+ return True
+
+ def check_autoneg_supported(self, remote=False):
+ if remote==False:
+ local_autoneg = self.get_ethtool_field("supports-auto-negotiation")
+ if local_autoneg is None:
+ ksft_pr(f"Unable to fetch auto-negotiation status for interface {self.cfg.ifname}")
+ """Return autoneg status of the local interface"""
+ status = True if local_autoneg == True else False
+ return status
+ else:
+ """Check remote auto-negotiation support status"""
+ partner_autoneg = False
+ if self.partner_netif is not None:
+ partner_autoneg = self.get_ethtool_field("supports-auto-negotiation", remote=True)
+ if partner_autoneg is None:
+ ksft_pr(f"Unable to fetch auto-negotiation status for interface {partner_netif}")
+ status = True if partner_autoneg is True else False
+ return status
+
+ def get_common_link_modes(self):
+ common_link_modes = None
+ """Populate common link modes"""
+ link_modes = self.get_ethtool_field("supported-link-modes")
+ partner_link_modes = self.get_ethtool_field("link-partner-advertised-link-modes")
+ if link_modes is None:
+ raise Exception(f"Link modes not available for {self.cfg.ifname}")
+ if partner_link_modes is None:
+ raise Exception(f"Partner link modes not available for {self.cfg.ifname}")
+ common_link_modes = set(link_modes) and set(partner_link_modes)
+ return common_link_modes
+
+ def get_speed_duplex_values(self, link_modes):
+ speed = []
+ duplex = []
+ """Check the link modes"""
+ for data in link_modes:
+ parts = data.split('/')
+ speed_value = re.match(r'\d+', parts[0])
+ if speed_value:
+ speed.append(speed_value.group())
+ else:
+ ksft_pr(f"No speed value found for interface {self.ifname}")
+ return None, None
+ duplex.append(parts[1].lower())
+ return speed, duplex
+
+ def get_ethtool_field(self, field: str, remote=False):
+ process = None
+ if remote == False:
+ """Get the ethtool field value for the local interface"""
+ ifname = self.cfg.ifname
+ try:
+ process = ethtool(f"--json {ifname}")
+ except Exception as e:
+ ksft_pr("Required minimum ethtool version is 6.10")
+ ksft_pr(f"Unexpected error occurred: {e}")
+ else:
+ """Get the ethtool field value for the remote interface"""
+ remote = True
+ ifname = self.partner_netif
+ self.cfg.require_cmd("ethtool", remote)
+ command = f"ethtool --json {ifname}"
+ try:
+ process = cmd(command, host=self.cfg.remote)
+ except Exception as e:
+ ksft_pr("Required minimum ethtool version is 6.10")
+ ksft_pr("Unexpected error occurred: {e}")
+ if process is None or process.ret != 0:
+ print(f"Error while getting the ethtool content for interface {ifname}. Required minimum ethtool version is 6.10")
+ return None
+ output = json.loads(process.stdout)
+ json_data = output[0]
+ """Check if the field exist in the json data"""
+ if field not in json_data:
+ raise Exception(f"Field {field} does not exist in the output of interface {json_data["ifname"]}")
+ return None
+ return json_data[field]
diff --git a/tools/testing/selftests/drivers/net/hw/nic_link_layer.py b/tools/testing/selftests/drivers/net/hw/nic_link_layer.py
new file mode 100644
index 000000000..fb046efbe
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/hw/nic_link_layer.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+#Introduction:
+#This file has basic link layer tests for generic NIC drivers.
+#The test comprises of auto-negotiation, speed and duplex checks.
+#
+#Setup:
+#Connect the DUT PC with NIC card to partner pc back via ethernet medium of your choice(RJ45, T1)
+#
+# DUT PC Partner PC
+#┌───────────────────────┐ ┌──────────────────────────┐
+#│ │ │ │
+#│ │ │ │
+#│ ┌───────────┐ │ │
+#│ │DUT NIC │ Eth │ │
+#│ │Interface ─┼─────────────────────────┼─ any eth Interface │
+#│ └───────────┘ │ │
+#│ │ │ │
+#│ │ │ │
+#└───────────────────────┘ └──────────────────────────┘
+#
+#Configurations:
+#To prevent interruptions, Add ethtool, ip to the sudoers list in remote PC and get the ssh key from remote.
+#Required minimum ethtool version is 6.10
+#Change the below configuration based on your hw needs.
+# """Default values"""
+time_delay = 8 #time taken to wait for transitions to happen, in seconds.
+test_duration = 10 #performance test duration for the throughput check, in seconds.
+
+import time
+from lib.py import ksft_run, ksft_exit, ksft_pr, ksft_eq
+from lib.py import KsftFailEx, KsftSkipEx
+from lib.py import NetDrvEpEnv
+from lib.py import LinkConfig
+
+def verify_autonegotiation(cfg, expected_state: str, link_config) -> None:
+ if link_config.verify_link_up() == False:
+ raise KsftSkipEx(f"Link state of interface {cfg.ifname} is DOWN")
+ """Verifying the autonegotiation state in partner"""
+ partner_autoneg_output = link_config.get_ethtool_field("auto-negotiation", remote=True)
+ if partner_autoneg_output is None:
+ KsftSkipEx(f"Auto-negotiation state not available for interface {link_config.partner_netif}")
+ partner_autoneg_state = "on" if partner_autoneg_output is True else "off"
+
+ ksft_eq(partner_autoneg_state, expected_state)
+
+ """Verifying the autonegotiation state"""
+ autoneg_output = link_config.get_ethtool_field("auto-negotiation")
+ if autoneg_output is None:
+ KsftSkipEx(f"Auto-negotiation state not available for interface {cfg.ifname}")
+ actual_state = "on" if autoneg_output is True else "off"
+
+ ksft_eq(actual_state, expected_state)
+
+ """Verifying the link establishment"""
+ link_available = link_config.get_ethtool_field("link-detected")
+ if link_available is None:
+ KsftSkipEx(f"Link status not available for interface {cfg.ifname}")
+ if link_available != True:
+ raise KsftSkipEx("Link not established at interface {cfg.ifname} after changing auto-negotiation")
+
+def test_autonegotiation(cfg, link_config) -> None:
+ if link_config.partner_netif == None:
+ KsftSkipEx("Partner interface name is not available")
+ if not link_config.check_autoneg_supported() or not link_config.check_autoneg_supported(remote=True):
+ KsftSkipEx(f"Auto-negotiation not supported for interface {cfg.ifname} or {link_config.partner_netif}")
+ for state in ["off", "on"]:
+ if link_config.set_autonegotiation_state(state, remote=True) == False:
+ raise KsftSkipEx(f"Unable to set auto-negotiation state for interface {link_config.partner_netif}")
+ if link_config.set_autonegotiation_state(state) == False:
+ raise KsftSkipEx(f"Unable to set auto-negotiation state for interface {cfg.ifname}")
+ time.sleep(time_delay)
+ verify_autonegotiation(cfg, state, link_config)
+
+def main() -> None:
+ with NetDrvEpEnv(__file__, nsim_test=False) as cfg:
+ link_config = LinkConfig(cfg)
+ ksft_run(globs=globals(), case_pfx={"test_"}, args=(cfg, link_config,))
+ link_config.reset_interface()
+ ksft_exit()
+
+if __name__ == "__main__":
+ main()
--
2.43.0
