From: Sean Anderson <sean.anderson@seco.com>
To: "Russell King (Oracle)" <linux@armlinux.org.uk>
Cc: netdev@vger.kernel.org, Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Vladimir Oltean <olteanv@gmail.com>,
Alexandru Marginean <alexandru.marginean@nxp.com>,
linux-kernel@vger.kernel.org,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>
Subject: Re: [PATCH net-next v5 5/8] net: phylink: Adjust link settings based on rate adaptation
Date: Wed, 7 Sep 2022 13:01:49 -0400 [thread overview]
Message-ID: <f2c15d18-23c0-463e-775e-f99e42cd4a69@seco.com> (raw)
In-Reply-To: <YxhuMjZsBb7wCBFy@shell.armlinux.org.uk>
On 9/7/22 6:10 AM, Russell King (Oracle) wrote:
> On Tue, Sep 06, 2022 at 12:18:49PM -0400, Sean Anderson wrote:
>> @@ -1015,19 +1086,45 @@ static void phylink_link_up(struct phylink *pl,
>> struct phylink_link_state link_state)
>> {
>> struct net_device *ndev = pl->netdev;
>> + int speed, duplex;
>> + bool rx_pause;
>> +
>> + speed = link_state.speed;
>> + duplex = link_state.duplex;
>> + rx_pause = !!(link_state.pause & MLO_PAUSE_RX);
>> +
>> + switch (link_state.rate_adaptation) {
>> + case RATE_ADAPT_PAUSE:
>> + /* The PHY is doing rate adaption from the media rate (in
>> + * the link_state) to the interface speed, and will send
>> + * pause frames to the MAC to limit its transmission speed.
>> + */
>> + speed = phylink_interface_max_speed(link_state.interface);
>> + duplex = DUPLEX_FULL;
>> + rx_pause = true;
>> + break;
>> +
>> + case RATE_ADAPT_CRS:
>> + /* The PHY is doing rate adaption from the media rate (in
>> + * the link_state) to the interface speed, and will cause
>> + * collisions to the MAC to limit its transmission speed.
>> + */
>> + speed = phylink_interface_max_speed(link_state.interface);
>> + duplex = DUPLEX_HALF;
>> + break;
>> + }
>>
>> pl->cur_interface = link_state.interface;
>> + if (link_state.rate_adaptation == RATE_ADAPT_PAUSE)
>> + link_state.pause |= MLO_PAUSE_RX;
>
> I specifically omitted this from my patch because I don't think we
> should tell the user that "Link is Up - ... - flow control rx" if
> we have rate adaption, but the media link is not using flow control.
>
> The "Link is Up" message tells the user what was negotiated on the
> media, not what is going on inside their network device, so the
> fact we're using rate adaption which has turned on RX pause on the
> MAC is neither here nor there.
OK, I will leave this out then.
>>
>> if (pl->pcs && pl->pcs->ops->pcs_link_up)
>> pl->pcs->ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode,
>> - pl->cur_interface,
>> - link_state.speed, link_state.duplex);
>> + pl->cur_interface, speed, duplex);
>
> It seems you have one extra unnecessary space here - not sure how
> that occurred as it isn't in my original patch.
>
This corrects a spacing issue in the existing code.
--Sean
next prev parent reply other threads:[~2022-09-07 17:02 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-06 16:18 [PATCH net-next v5 0/8] net: phy: Add support for rate adaptation Sean Anderson
2022-09-06 16:18 ` [PATCH net-next v5 1/8] net: phylink: Document MAC_(A)SYM_PAUSE Sean Anderson
2022-09-07 9:38 ` Russell King (Oracle)
2022-09-07 16:52 ` Sean Anderson
2022-09-07 18:04 ` Russell King (Oracle)
2022-09-07 20:11 ` Sean Anderson
2022-09-07 21:01 ` Russell King (Oracle)
2022-09-07 22:39 ` Sean Anderson
2022-09-08 14:21 ` Russell King (Oracle)
2022-09-08 21:03 ` Sean Anderson
2022-09-08 21:58 ` Russell King (Oracle)
2022-09-06 16:18 ` [PATCH net-next v5 2/8] net: phylink: Export phylink_caps_to_linkmodes Sean Anderson
2022-09-06 16:18 ` [PATCH net-next v5 3/8] net: phylink: Generate caps and convert to linkmodes separately Sean Anderson
2022-09-07 9:42 ` Russell King (Oracle)
2022-09-07 16:55 ` Sean Anderson
2022-09-06 16:18 ` [PATCH net-next v5 4/8] net: phy: Add support for rate adaptation Sean Anderson
2022-09-06 16:18 ` [PATCH net-next v5 5/8] net: phylink: Adjust link settings based on " Sean Anderson
2022-09-07 10:10 ` Russell King (Oracle)
2022-09-07 17:01 ` Sean Anderson [this message]
2022-09-07 18:06 ` Russell King (Oracle)
2022-09-06 16:18 ` [PATCH net-next v5 6/8] net: phylink: Adjust advertisement " Sean Anderson
2022-09-06 16:18 ` [PATCH net-next v5 7/8] net: phy: aquantia: Add some additional phy interfaces Sean Anderson
2022-09-06 16:18 ` [PATCH net-next v5 8/8] net: phy: aquantia: Add support for rate adaptation Sean Anderson
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