From patchwork Tue Jun 30 14:29:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King \(Oracle\)" X-Patchwork-Id: 216776 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E516EC433DF for ; Tue, 30 Jun 2020 14:29:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD25620672 for ; Tue, 30 Jun 2020 14:29:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="YuEaWWps" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389010AbgF3O32 (ORCPT ); Tue, 30 Jun 2020 10:29:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388849AbgF3O31 (ORCPT ); Tue, 30 Jun 2020 10:29:27 -0400 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 43AD4C061755 for ; Tue, 30 Jun 2020 07:29:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References: In-Reply-To:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=ePHEHKj8qGSric55X2Hqpx4BLic588fCFn2O45mmvUw=; b=YuEaWWps1eICGYTbihFU7vUBV4 h9gQQiWvOAQfWklLTp9cm9QQPum+1iJ5HdJPQBSvwZjJDgCipRta6zMblq6VZPpz4olQHhkzp4CD5 Z7WGMIm6rjiFq7w1YHIqiBBNQIDoZww7zOGi0hKD2zp4MSK3wbww3hgYen+eI1pxmEyw/I3u7CE8K ynwxzC0fmzxTWILe/pC89eewZ0gRwGr4+KxufBTnI3G9h0G9mqBaR36F/zw2+cIW96lzV5YyPCnJf mnw16cty4+RmusMx59OupQdDvfRYXoi89is/KMiviK77I47iiWyCmd1MNfCF8OuVYEMwTtWznhF+e VdLQN4Ew==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:47276 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jqHGE-0000fb-Gp; Tue, 30 Jun 2020 15:29:22 +0100 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1jqHGE-0006Pz-5h; Tue, 30 Jun 2020 15:29:22 +0100 In-Reply-To: <20200630142754.GC1551@shell.armlinux.org.uk> References: <20200630142754.GC1551@shell.armlinux.org.uk> From: Russell King To: Andrew Lunn , Florian Fainelli , Heiner Kallweit , Ioana Ciornei Cc: Vladimir Oltean , Claudiu Manoil , Alexandru Marginean , "michael@walle.cc" , "olteanv@gmail.com" , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org Subject: [PATCH RFC net-next 10/13] net: phylink: in-band pause mode advertisement update for PCS MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Tue, 30 Jun 2020 15:29:22 +0100 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Re-code the pause in-band advertisement update in light of the addition of PCS support, so that we perform the minimum required; only the PCS configuration function needs to be called in this case, followed by the request to trigger a restart of negotiation if the programmed advertisement changed. We need to change the pcs_config() signature to pass whether resolved pause should be passed to the MAC for setups such as mvneta and mvpp2 where doing so overrides the MAC manual flow controls. Signed-off-by: Russell King --- drivers/net/phy/phylink.c | 55 ++++++++++++++++++++++++++++++++++++--- include/linux/phylink.h | 7 +++-- 2 files changed, 56 insertions(+), 6 deletions(-) diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index b91151062cdc..09f4aeef15c7 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -441,7 +441,9 @@ static void phylink_pcs_config(struct phylink *pl, bool force_restart, if (pl->pcs_ops && pl->pcs_ops->pcs_config(pl->config, pl->cur_link_an_mode, state->interface, - state->advertising)) + state->advertising, + !!(pl->link_config.pause & + MLO_PAUSE_AN))) restart = true; phylink_mac_config(pl, state); @@ -450,6 +452,49 @@ static void phylink_pcs_config(struct phylink *pl, bool force_restart, phylink_mac_pcs_an_restart(pl); } +/* + * Reconfigure for a change of inband advertisement. + * If we have a separate PCS, we only need to call its pcs_config() method, + * and then restart AN if it indicates something changed. Otherwise, we do + * the full MAC reconfiguration. + */ +static int phylink_change_inband_advert(struct phylink *pl) +{ + int ret; + + if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) + return 0; + + if (!pl->pcs_ops) { + /* Legacy method */ + phylink_mac_config(pl, &pl->link_config); + phylink_mac_pcs_an_restart(pl); + return 0; + } + + phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__, + phylink_an_mode_str(pl->cur_link_an_mode), + phy_modes(pl->link_config.interface), + __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising, + pl->link_config.pause); + + /* Modern PCS-based method; update the advert at the PCS, and + * restart negotiation if the pcs_config() helper indicates that + * the programmed advertisement has changed. + */ + ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode, + pl->link_config.interface, + pl->link_config.advertising, + !!(pl->link_config.pause & MLO_PAUSE_AN)); + if (ret < 0) + return ret; + + if (ret > 0) + phylink_mac_pcs_an_restart(pl); + + return 0; +} + static void phylink_mac_pcs_get_state(struct phylink *pl, struct phylink_link_state *state) { @@ -1525,9 +1570,11 @@ int phylink_ethtool_set_pauseparam(struct phylink *pl, config->pause = pause_state; - if (!pl->phydev && !test_bit(PHYLINK_DISABLE_STOPPED, - &pl->phylink_disable_state)) - phylink_pcs_config(pl, true, &pl->link_config); + /* Update our in-band advertisement, triggering a renegotiation if + * the advertisement changed. + */ + if (!pl->phydev) + phylink_change_inband_advert(pl); mutex_unlock(&pl->state_mutex); diff --git a/include/linux/phylink.h b/include/linux/phylink.h index b32b8b45421b..d9913d8e6b91 100644 --- a/include/linux/phylink.h +++ b/include/linux/phylink.h @@ -286,7 +286,8 @@ struct phylink_pcs_ops { struct phylink_link_state *state); int (*pcs_config)(struct phylink_config *config, unsigned int mode, phy_interface_t interface, - const unsigned long *advertising); + const unsigned long *advertising, + bool permit_pause_to_mac); void (*pcs_an_restart)(struct phylink_config *config); void (*pcs_link_up)(struct phylink_config *config, unsigned int mode, phy_interface_t interface, int speed, int duplex); @@ -317,9 +318,11 @@ void pcs_get_state(struct phylink_config *config, * @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND. * @interface: interface mode to be used * @advertising: adertisement ethtool link mode mask + * @permit_pause_to_mac: permit forwarding pause resolution to MAC * * Configure the PCS for the operating mode, the interface mode, and set - * the advertisement mask. + * the advertisement mask. @permit_pause_to_mac indicates whether the + * hardware may forward the pause mode resolution to the MAC. * * When operating in %MLO_AN_INBAND, inband should always be enabled, * otherwise inband should be disabled.