linux-kernel - RE: [PATCH net-next 2/3] selftests: lan743x: Add testcase to check speed and duplex state of lan743x

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Message-ID:
 <DM6PR11MB42366329CE76F1C90ABD9265839E2@DM6PR11MB4236.namprd11.prod.outlook.com>
Date: Fri, 6 Sep 2024 06:52:25 +0000
From: <Mohan.Prasad@...rochip.com>
To: <bcreeley@....com>, <netdev@...r.kernel.org>, <davem@...emloft.net>,
	<kuba@...nel.org>
CC: <shuah@...nel.org>, <Bryan.Whitehead@...rochip.com>,
	<UNGLinuxDriver@...rochip.com>, <edumazet@...gle.com>, <pabeni@...hat.com>,
	<linux-kernel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
	<horms@...nel.org>, <brett.creeley@....com>, <rosenp@...il.com>
Subject: RE: [PATCH net-next 2/3] selftests: lan743x: Add testcase to check
 speed and duplex state of lan743x

Hi Brett,

Thank you for the review comments.

> EXTERNAL EMAIL: Do not click links or open attachments unless you know the
> content is safe
> 
> On 9/3/2024 3:15 PM, Mohan Prasad J wrote:
> > Caution: This message originated from an External Source. Use proper
> caution when opening attachments, clicking links, or responding.
> >
> >
> > Add testcase for checking speed and duplex states for lan743x network
> > driver.
> > Testcase comprises of varying the network speed and duplex state to
> > 10/100/1000Mbps and half/full via ethtool.
> >
> > Signed-off-by: Mohan Prasad J <mohan.prasad@...rochip.com>
> > ---
> >   .../net/hw/microchip/lan743x/lan743x.py       | 33 +++++++++++++++++++
> >   1 file changed, 33 insertions(+)
> >
> > diff --git
> > a/tools/testing/selftests/drivers/net/hw/microchip/lan743x/lan743x.py
> > b/tools/testing/selftests/drivers/net/hw/microchip/lan743x/lan743x.py
> > index f1ad97dc2..59f0be2a7 100755
> > ---
> > a/tools/testing/selftests/drivers/net/hw/microchip/lan743x/lan743x.py
> > +++ b/tools/testing/selftests/drivers/net/hw/microchip/lan743x/lan743x
> > +++ .py
> > @@ -36,12 +36,45 @@ def verify_autonegotiation(ifname: str,
> expected_state: str) -> None:
> >       actual_state = autoneg_match.group(1)
> >       ksft_eq(actual_state, expected_state)
> >
> > +def set_speed_and_duplex(ifname: str, speed: str, duplex: str) -> None:
> > +    """Set the speed and duplex state for the interface"""
> > +    process = ethtool(f"--change {ifname} speed {speed} duplex
> > +{duplex} autoneg on")
> > +
> > +    if process.ret != 0:
> > +        raise KsftFailEx(f"Not able to set speeed and duplex parameters for
> {ifname}")
> > +    ksft_pr(f"Speed: {speed} Mbps, Duplex: {duplex} set for
> > + Interface: {ifname}")
> > +
> > +def verify_speed_and_duplex(ifname: str, expected_speed: str,
> expected_duplex: str) -> None:
> > +    verify_link_up(ifname)
> > +    """Verifying the speed and duplex state for the interface"""
> > +    output = ethtool(f"{ifname}")
> 
> How does "output" get used here?

"output" is not used anywhere, I will remove this in the next version.

> 
> > +    with open(f"/sys/class/net/{ifname}/speed", "r") as fp:
> > +        actual_speed = fp.read().strip()
> > +    with open(f"/sys/class/net/{ifname}/duplex", "r") as fp:
> > +        actual_duplex = fp.read().strip()
> 
> Should you check speed/duplex from both sysfs and ethtool? Maybe that's
> overkill.

I will remove the ethtool dependency here in the next version.

> 
> Thanks,
> 
> Brett
> 
> > +
> > +    ksft_eq(actual_speed, expected_speed)
> > +    ksft_eq(actual_duplex, expected_duplex)
> > +
> >   def test_autonegotiation(cfg) -> None:
> >       for state in ["off", "on"]:
> >           set_autonegotiation_state(cfg.ifname, state)
> >           time.sleep(5)
> >           verify_autonegotiation(cfg.ifname, state)
> >
> > +def test_network_speed(cfg) -> None:
> > +    speeds = ["10", "100", "1000"]
> > +    duplex_modes = ["half", "full"]
> > +
> > +    for speed in speeds:
> > +        for duplex in duplex_modes:
> > +            # Skip for speed = 1000Mbps, duplex = Half
> > +            if speed == "1000" and duplex == "half":
> > +                continue
> > +            set_speed_and_duplex(cfg.ifname, speed, duplex)
> > +            time.sleep(5)
> > +            verify_speed_and_duplex(cfg.ifname, speed, duplex)
> > + >   def main() -> None:
> >       with NetDrvEpEnv(__file__) as cfg:
> >           ksft_run(globs=globals(), case_pfx={"test_"}, args=(cfg,))
> > --
> > 2.43.0
> >