From nobody Sun Feb 8 23:57:41 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 DEC76C001B0 for ; Fri, 14 Jul 2023 16:06:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235930AbjGNQGe (ORCPT ); Fri, 14 Jul 2023 12:06:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235666AbjGNQGd (ORCPT ); Fri, 14 Jul 2023 12:06:33 -0400 Received: from mail.helmholz.de (mail.helmholz.de [217.6.86.34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0F10D35A2 for ; Fri, 14 Jul 2023 09:06:31 -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=1k5GroWq4JCpJQz7Xqh6qwVBRPC8oeGSG7kWkRzGWT4=; b=KG4Aa75e/6yy5taZ7i3d7bcLJS 05lY5mkAPtUaQBFxHv50OoSOxUqXDQ2WReZ1UeuEDfPwVNhtl+KDPGfgP3r+CWIZsdQ81mNmsP1M3 3WGkDT6YMqOAHEf0QYa5EmzNSUGacZRxixlvVVQ7oFgUlmNSb2Gw3o2S3dVQbhKObepbdPgY3So/f kmoPRB1IaQcTz3eXssfojTSkt/2lgmm6m6PIfM5Y7r72AizHwm2hF2GhwNWTI8EZnqjeUAz6rmiqX ODYiFKBkqO1ZJ4pVb19JW4mxzOOeP4GLH+kLFWRQO3SXvLQs42zVOnk1kb1kjDXX9TtJK7p0Imst9 OOleXz7A==; Received: from [192.168.1.4] (port=29409 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 1qKLJL-0000Qk-1M; Fri, 14 Jul 2023 18:06:27 +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; Fri, 14 Jul 2023 18:06:26 +0200 From: Ante Knezic To: CC: , , , , , , , , Ante Knezic Subject: [PATCH net-next v2] net: dsa: mv88e6xxx: Add erratum 3.14 for 88E6390X and 88E6190X Date: Fri, 14 Jul 2023 18:06:12 +0200 Message-ID: <20230714160612.11701-1-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: Andrew Lunn --- 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/serdes.c | 37 ++++++++++++++++++++++++++++++++++= +++ 1 file changed, 37 insertions(+) diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx= /serdes.c index 80167d53212f..b36049595c6b 100644 --- a/drivers/net/dsa/mv88e6xxx/serdes.c +++ b/drivers/net/dsa/mv88e6xxx/serdes.c @@ -829,6 +829,37 @@ static int mv88e6390_serdes_enable_checker(struct mv88= e6xxx_chip *chip, int lane MV88E6390_PG_CONTROL, reg); } =20 +static int mv88e6390x_serdes_erratum_3_14(struct mv88e6xxx_chip *chip) +{ + 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 mv88e6390_serdes_write(chip, lanes[i], + MDIO_MMD_PHYXS, + 0xf054, 0x400C); + if (err) + return err; + + err =3D mv88e6390_serdes_write(chip, lanes[i], + MDIO_MMD_PHYXS, + 0xf054, 0x4000); + if (err) + return err; + } + + return 0; +} + int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip, int port, int lane, bool up) { @@ -853,6 +884,12 @@ int mv88e6390_serdes_power(struct mv88e6xxx_chip *chip= , int port, int lane, if (!err && up) err =3D mv88e6390_serdes_enable_checker(chip, lane); =20 + if (!err && up) { + 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) + err =3D mv88e6390x_serdes_erratum_3_14(chip); + } + return err; } =20 --=20 2.11.0