From patchwork Fri Jun 23 14:17:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King (Oracle)" X-Patchwork-Id: 13290691 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 D87ED8F6D for ; Fri, 23 Jun 2023 14:17:18 +0000 (UTC) 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 6368FA2 for ; Fri, 23 Jun 2023 07:17:17 -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=aHnWit7o/nv9RsHlP2yye0y15jZeCNSVgumhvHLc2IU=; b=oz82DBvXW9oolMgwk1yxfD+i2o BMresAoLjV3J5cjuEGOc0t3vFNQCNLbr9Z6kVsFIZ8u7D0fk/BH6j8nKktRqroNy11ogI3VDhLvBe HSDAOEzgVW5solhUNTyRGx5FZwHYfpn3Cu4IwRIf7jPltamqvEfvtz5mhTsI1CTDsv7PCo2lKExkg 0CzfWgLEN7/vAvz/Ox0XH3Hx6UzGGnSoSWL6jZ2D8p+O8utMcjhmfVHlJlvKuZHMbkRsWOBEG6ATM x2VzVlbQSyuv8QHNV2tg2V2flFRRi4D1Ny6QSTlexKSVLpCbfP4SMCLGVR6ld/L71Dxgkuxaguz4w aBAUrgnA==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:53850 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1qChaz-0005OU-D8; Fri, 23 Jun 2023 15:17:05 +0100 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1qChay-00Fmrf-9Y; Fri, 23 Jun 2023 15:17:04 +0100 In-Reply-To: References: From: "Russell King (Oracle)" To: Andrew Lunn , Heiner Kallweit Cc: Alexandre Belloni , AngeloGioacchino Del Regno , "Ar__n__ __NAL" , Claudiu Manoil , Daniel Golle , "David S. Miller" , DENG Qingfang , Eric Dumazet , Florian Fainelli , Jakub Kicinski , Landen Chao , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Matthias Brugger , netdev@vger.kernel.org, Paolo Abeni , Sean Wang , UNGLinuxDriver@microchip.com, Vladimir Oltean Subject: [PATCH RFC net-next 03/14] net: phylink: add support for PCS link change notifications Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Message-Id: Sender: Russell King Date: Fri, 23 Jun 2023 15:17:04 +0100 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Add a function, phylink_pcs_change() which can be used by PCs drivers to notify phylink about changes to the PCS link state. Signed-off-by: Russell King (Oracle) --- drivers/net/phy/phylink.c | 38 ++++++++++++++++++++++++++++++++++---- include/linux/phylink.h | 7 +++++++ 2 files changed, 41 insertions(+), 4 deletions(-) diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 9840a2952309..71b1012ef3be 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -1137,6 +1137,11 @@ static void phylink_major_config(struct phylink *pl, bool restart, if (pcs_changed) { phylink_pcs_disable(pl->pcs); + if (pl->pcs) + pl->pcs->phylink = NULL; + + pcs->phylink = pl; + pl->pcs = pcs; } @@ -1991,6 +1996,14 @@ void phylink_disconnect_phy(struct phylink *pl) } EXPORT_SYMBOL_GPL(phylink_disconnect_phy); +static void phylink_link_changed(struct phylink *pl, bool up, const char *what) +{ + if (!up) + pl->mac_link_dropped = true; + phylink_run_resolve(pl); + phylink_dbg(pl, "%s link %s\n", what, up ? "up" : "down"); +} + /** * phylink_mac_change() - notify phylink of a change in MAC state * @pl: a pointer to a &struct phylink returned from phylink_create() @@ -2001,13 +2014,30 @@ EXPORT_SYMBOL_GPL(phylink_disconnect_phy); */ void phylink_mac_change(struct phylink *pl, bool up) { - if (!up) - pl->mac_link_dropped = true; - phylink_run_resolve(pl); - phylink_dbg(pl, "mac link %s\n", up ? "up" : "down"); + phylink_link_changed(pl, up, "mac"); } EXPORT_SYMBOL_GPL(phylink_mac_change); +/** + * phylink_pcs_change() - notify phylink of a change to PCS link state + * @pcs: pointer to &struct phylink_pcs + * @up: indicates whether the link is currently up. + * + * The PCS driver should call this when the state of its link changes + * (e.g. link failure, new negotiation results, etc.) Note: it should + * not determine "up" by reading the BMSR. If in doubt about the link + * state at interrupt time, then pass true if pcs_get_state() returns + * the latched link-down state, otherwise pass false. + */ +void phylink_pcs_change(struct phylink_pcs *pcs, bool up) +{ + struct phylink *pl = pcs->phylink; + + if (pl) + phylink_link_changed(pl, up, "pcs"); +} +EXPORT_SYMBOL_GPL(phylink_pcs_change); + static irqreturn_t phylink_link_handler(int irq, void *data) { struct phylink *pl = data; diff --git a/include/linux/phylink.h b/include/linux/phylink.h index e609b208fa3d..734fb4ca9cf7 100644 --- a/include/linux/phylink.h +++ b/include/linux/phylink.h @@ -9,6 +9,7 @@ struct device_node; struct ethtool_cmd; struct fwnode_handle; struct net_device; +struct phylink; enum { MLO_PAUSE_NONE, @@ -518,14 +519,19 @@ struct phylink_pcs_ops; /** * struct phylink_pcs - PHYLINK PCS instance * @ops: a pointer to the &struct phylink_pcs_ops structure + * @phylink: pointer to &struct phylink_config * @neg_mode: provide PCS neg mode via "mode" argument * @poll: poll the PCS for link changes * * This structure is designed to be embedded within the PCS private data, * and will be passed between phylink and the PCS. + * + * The @phylink member is private to phylink and must not be touched by + * the PCS driver. */ struct phylink_pcs { const struct phylink_pcs_ops *ops; + struct phylink *phylink; bool neg_mode; bool poll; }; @@ -697,6 +703,7 @@ int phylink_fwnode_phy_connect(struct phylink *pl, void phylink_disconnect_phy(struct phylink *); void phylink_mac_change(struct phylink *, bool up); +void phylink_pcs_change(struct phylink_pcs *, bool up); void phylink_start(struct phylink *); void phylink_stop(struct phylink *);