From nobody Mon Feb 9 01:07:08 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1FCB9C0015E for ; Tue, 1 Aug 2023 06:48:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231925AbjHAGss (ORCPT ); Tue, 1 Aug 2023 02:48:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56304 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230461AbjHAGsm (ORCPT ); Tue, 1 Aug 2023 02:48:42 -0400 Received: from mail.helmholz.de (mail.helmholz.de [217.6.86.34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E123895 for ; Mon, 31 Jul 2023 23:48:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=helmholz.de ; s=dkim1; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From: Sender:Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=DDfKZAST0kBdA4G1Zj06EBEeG3//RNdqqNF0W9wlm6w=; b=JVGwLVev2GMY3Uuq446yK44MGz 8hauO+kaAfK9fCwNUmRr5UeYwrtFT67wnf77tXgpfPp4iBcoJlo8797kbkwFUIULlUh5K1kRDmXbg 0KgOJ4x32ShUuMQcxv1zALE7nxOpUnoFJwvmQyJtTn28xdL8ZjBm3K9Klv5dZeydbMDj1Z0mx1jYB XLIDBxqmTqLj2gGtSIlNvX7rvGsoGVWQXCO5m6Hora64e0nysbMNuvuXtBIAiWNZdDEvg7F8pB6ZC Td7H5zOpROAg0M+OP3gN7CI5irpx78JBc5G2+sQFOL0IDSBzD0674ZPF2TMcOEf20J8LGN3CSeodp SAnT6v0Q==; Received: from [192.168.1.4] (port=16778 helo=SH-EX2013.helmholz.local) by mail.helmholz.de with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 (Exim 4.96) (envelope-from ) id 1qQjBL-0008GM-1R; Tue, 01 Aug 2023 08:48:35 +0200 Received: from linuxdev.helmholz.local (192.168.6.7) by SH-EX2013.helmholz.local (192.168.1.4) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Tue, 1 Aug 2023 08:48:34 +0200 From: Ante Knezic To: CC: , , , , , , , , , Ante Knezic Subject: [PATCH net-next v5] net: dsa: mv88e6xxx: Add erratum 3.14 for 88E6390X and 88E6190X Date: Tue, 1 Aug 2023 08:48:15 +0200 Message-ID: <20230801064815.25694-1-ante.knezic@helmholz.de> X-Mailer: git-send-email 2.11.0 MIME-Version: 1.0 X-Originating-IP: [192.168.6.7] X-ClientProxiedBy: SH-EX2013.helmholz.local (192.168.1.4) To SH-EX2013.helmholz.local (192.168.1.4) X-EXCLAIMER-MD-CONFIG: 2ae5875c-d7e5-4d7e-baa3-654d37918933 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Fixes XAUI/RXAUI lane alignment errors. Issue causes dropped packets when trying to communicate over fiber via SERDES lanes of port 9 and 10. Errata document applies only to 88E6190X and 88E6390X devices. Requires poking in undocumented registers. Signed-off-by: Ante Knezic Reviewed-by: Vladimir Oltean --- V5 : No patch changes, repost due to missing CC V4 : Rework as suggested by Vladimir Oltean and Russell King * print error in case of failure to apply erratum * use mdiobus_c45_write instead of mdiodev_c45_write * use bool variable instead of embedding a chip pointer inside pcs struct. V3 : Rework to fit the new phylink_pcs infrastructure V2 : Rework as suggested by Andrew Lunn =20 * make int lanes[] const=20 * reorder prod_nums * update commit message to indicate we are dealing with undocumented Marvell registers and magic values --- drivers/net/dsa/mv88e6xxx/pcs-639x.c | 45 ++++++++++++++++++++++++++++++++= ++++ 1 file changed, 45 insertions(+) diff --git a/drivers/net/dsa/mv88e6xxx/pcs-639x.c b/drivers/net/dsa/mv88e6x= xx/pcs-639x.c index 98dd49dac421..ba373656bfe1 100644 --- a/drivers/net/dsa/mv88e6xxx/pcs-639x.c +++ b/drivers/net/dsa/mv88e6xxx/pcs-639x.c @@ -20,6 +20,7 @@ struct mv88e639x_pcs { struct mdio_device mdio; struct phylink_pcs sgmii_pcs; struct phylink_pcs xg_pcs; + bool erratum_3_14; bool supports_5g; phy_interface_t interface; unsigned int irq; @@ -205,13 +206,53 @@ static void mv88e639x_sgmii_pcs_pre_config(struct phy= link_pcs *pcs, mv88e639x_sgmii_pcs_control_pwr(mpcs, false); } =20 +static int mv88e6390_erratum_3_14(struct mv88e639x_pcs *mpcs) +{ + const int lanes[] =3D { MV88E6390_PORT9_LANE0, MV88E6390_PORT9_LANE1, + MV88E6390_PORT9_LANE2, MV88E6390_PORT9_LANE3, + MV88E6390_PORT10_LANE0, MV88E6390_PORT10_LANE1, + MV88E6390_PORT10_LANE2, MV88E6390_PORT10_LANE3 }; + int err, i; + + /* 88e6190x and 88e6390x errata 3.14: + * After chip reset, SERDES reconfiguration or SERDES core + * Software Reset, the SERDES lanes may not be properly aligned + * resulting in CRC errors + */ + + for (i =3D 0; i < ARRAY_SIZE(lanes); i++) { + err =3D mdiobus_c45_write(mpcs->mdio.bus, lanes[i], + MDIO_MMD_PHYXS, + 0xf054, 0x400C); + if (err) + return err; + + err =3D mdiobus_c45_write(mpcs->mdio.bus, lanes[i], + MDIO_MMD_PHYXS, + 0xf054, 0x4000); + if (err) + return err; + } + + return 0; +} + static int mv88e639x_sgmii_pcs_post_config(struct phylink_pcs *pcs, phy_interface_t interface) { struct mv88e639x_pcs *mpcs =3D sgmii_pcs_to_mv88e639x_pcs(pcs); + int err; =20 mv88e639x_sgmii_pcs_control_pwr(mpcs, true); =20 + if (mpcs->erratum_3_14) { + err =3D mv88e6390_erratum_3_14(mpcs); + if (err) + dev_err(mpcs->mdio.dev.parent, + "failed to apply erratum 3.14: %pe\n", + ERR_PTR(err)); + } + return 0; } =20 @@ -524,6 +565,10 @@ static int mv88e6390_pcs_init(struct mv88e6xxx_chip *c= hip, int port) mpcs->xg_pcs.ops =3D &mv88e6390_xg_pcs_ops; mpcs->xg_pcs.neg_mode =3D true; =20 + if (chip->info->prod_num =3D=3D MV88E6XXX_PORT_SWITCH_ID_PROD_6190X || + chip->info->prod_num =3D=3D MV88E6XXX_PORT_SWITCH_ID_PROD_6390X) + mpcs->erratum_3_14 =3D true; + err =3D mv88e639x_pcs_setup_irq(mpcs, chip, port); if (err) goto err_free; --=20 2.11.0