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

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Message-ID: <61428e08-8b88-41cf-83b6-123a857920c2@amd.com>
Date: Wed, 4 Sep 2024 09:05:41 -0700
From: Brett Creeley <bcreeley@....com>
To: Mohan Prasad J <mohan.prasad@...rochip.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



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?

> +    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.

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
>