From patchwork Wed Oct 16 21:50:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Mohan Prasad J X-Patchwork-Id: 837106 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2901314EC47; Thu, 17 Oct 2024 04:47:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.154.123 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729140480; cv=none; b=Wk8IheumqyGRVNsqEYxDzgykIDovUxMRWpjDXZeUXU1XCMmBfQ/7tRcFR+uozDv/pd1LZmB6tAHevwqHFiyqFpwruVeGkDFlqTIf5aGXxEE8n4a+L0qZ2dceAwG4qaZjR+BrG0oB+F13AJtMEO+txNp8MhmPkdCS78Y+NZ1o2vs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729140480; c=relaxed/simple; bh=z6t5jam2u2/qWSb3wbi2/QDu1djFH81oyHBk5nMiNsg=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=iAVs+yIy8YgPNrcCeU76aLmPMUakBb4pWotN6qYDL/WmrUYZlypoRgVbRVTF33QheQ0cMr1dzNWcO4aTpopeZNI/IyFFLDsEyb6z6kjqAtH1qld0/z1bBuEAgQcycW1sojAzinlfy4iuKdaVGXZzhW/xs+T7hDC8qKJLQNj+710= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com; spf=pass smtp.mailfrom=microchip.com; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b=qGMQL8yN; arc=none smtp.client-ip=68.232.154.123 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=microchip.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="qGMQL8yN" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1729140475; x=1760676475; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=z6t5jam2u2/qWSb3wbi2/QDu1djFH81oyHBk5nMiNsg=; b=qGMQL8yNzP0Fd1DIssaBSVEupGUEdoDMA7mwB/5qJIW+hQoOHby94WDs Yzzd0QMlLwc9BOkOkbtUVl/kNUyelkI1xAVKFoZKWjSEHejIwuNbOfybk /q9vm4ANkGMwIX2VDFsWqqxu4gaZGgBZ8cnUkxZmzTKl76QoDD4q/gmrN xGXZ1nZg4MgglBJWP033vV1e0FpSxmmxF/HCrOEQloBkb/WT5Csuf9rIF 1/C7Q6K3JDWNPPceavVC8kCe+wWYMA1JIOR4FZbNanIdYSnCf2skbg9LQ O1OudMq8Nu5Caqq1GYksrmjqA255NxQMwEJ0AjqtfGbK7lo7UGBahEMUe w==; X-CSE-ConnectionGUID: 8pbTCNeqT7aHxiJ1HBLGWw== X-CSE-MsgGUID: xiMjuXNmTMS+F8IIOLsAwA== X-IronPort-AV: E=Sophos;i="6.11,210,1725346800"; d="scan'208";a="200553966" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa6.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 16 Oct 2024 21:47:50 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Wed, 16 Oct 2024 21:47:27 -0700 Received: from nisar-OptiPlex-9020.microchip.com (10.10.85.11) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.35 via Frontend Transport; Wed, 16 Oct 2024 21:47:22 -0700 From: Mohan Prasad J To: , , , CC: , , , , , , , , , , , Subject: [PATCH net-next v3 1/3] selftests: nic_link_layer: Add link layer selftest for NIC driver Date: Thu, 17 Oct 2024 03:20:05 +0530 Message-ID: <20241016215014.401476-2-mohan.prasad@microchip.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241016215014.401476-1-mohan.prasad@microchip.com> References: <20241016215014.401476-1-mohan.prasad@microchip.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 --- .../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()