From patchwork Wed Feb 26 07:48:33 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Choong Yong Liang X-Patchwork-Id: 13991694 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A935EC021BC for ; Wed, 26 Feb 2025 07:56:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=HqEFbAxBG8varMxKoelSFF5RWCnKkI27T7Lf4vbXVX8=; b=VHrTthGR2sd9+3WfL+VaSDQRib oZYX/yFhLoLj9tDArggQpBBTUg5yqbzS1gxH+IHqHdp7j+cBOVkbU3zM+PqyBsyoSi7ZdVTdCQz8C RB5NENmBiJulnNIWX7vfz+O9NHv4ikqj2JCeT9jBy9xjvIvc3S8y1n1Ckha6Ts380QK5PXO3QqzPu lStYj/4b938dxqYdsrX5EeO2LugPLa56XD2FlLulC3bsUajvBfrT84Y1oU5ZDeya3ibpg3gjOOVgx HbKNf/xSSymVzUmp1+EfKN3LBdh7GmFoXmYz5h/vUQpD23gXYqTexA6Nffa1/1HJMDCxrLsEmzQ50 rUVGJ4qA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tnCGy-00000002li0-0pW7; Wed, 26 Feb 2025 07:56:04 +0000 Received: from mgamail.intel.com ([192.198.163.12]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tnCBH-00000002jx3-0fHj for linux-arm-kernel@lists.infradead.org; Wed, 26 Feb 2025 07:50:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1740556211; x=1772092211; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=u/mi+LCXMe4ShYx5Tg1OkjWGnid4ORB7ALNFCdTPXsg=; b=HQzQCR4X2ymW2pR73vqkq02tDtWx2Oy2wvpNVwTxZryX45I0Fv3GIw1t GHbGdAMQdS1ncNev7uIms/0hRx0m3EuFmm5ultwFCphDZxJDrF+7wXrPH Nh3yDRCHlBdhfuQTj6+nopO2Adsf1c/lKgkmPdxGOnBtugzb2GafrcSRf jCVAwQRilwXu9ieVr57t6kB6BgQfXASpk2jw9SPnLFhU2+ZChMCvZUO2G +dwrf2EmmvNzgvBT7MwkvlqmHd6BYwK5/rpk5DThieX9gsgwF9wY8TLpG nlNN7ipa4zKbdSinbDRC4DKdY5HXshIzOU44m8CAi0v0enVk0MoHa/LUY g==; X-CSE-ConnectionGUID: SqJC9eA+R3i8Zl2eQSWmCw== X-CSE-MsgGUID: WCZ58e2TQgKXyngvDyBjMA== X-IronPort-AV: E=McAfee;i="6700,10204,11356"; a="45305072" X-IronPort-AV: E=Sophos;i="6.13,316,1732608000"; d="scan'208";a="45305072" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Feb 2025 23:50:11 -0800 X-CSE-ConnectionGUID: i/OO3VdcRvuKu0+EnZjkoQ== X-CSE-MsgGUID: UDgjKog5QnuTjCxpgoys2g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="120743002" Received: from yongliang-ubuntu20-ilbpg12.png.intel.com ([10.88.227.39]) by fmviesa003.fm.intel.com with ESMTP; 25 Feb 2025 23:50:04 -0800 From: Choong Yong Liang To: Simon Horman , Jose Abreu , Jose Abreu , David E Box , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H . Peter Anvin" , Rajneesh Bhardwaj , David E Box , Andrew Lunn , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexandre Torgue , Jiawen Wu , Mengyuan Lou , Heiner Kallweit , Russell King , Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Richard Cochran , Serge Semin Cc: x86@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH net-next v8 2/6] net: pcs: xpcs: re-initiate clause 37 Auto-negotiation Date: Wed, 26 Feb 2025 15:48:33 +0800 Message-Id: <20250226074837.1679988-3-yong.liang.choong@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250226074837.1679988-1-yong.liang.choong@linux.intel.com> References: <20250226074837.1679988-1-yong.liang.choong@linux.intel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250225_235011_233296_01E2575B X-CRM114-Status: GOOD ( 14.86 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The xpcs_switch_interface_mode function was introduced to handle interface switching. According to the XPCS datasheet, a soft reset is required to initiate Clause 37 auto-negotiation when the XPCS switches interface modes. When the interface mode switches from 2500BASE-X to SGMII, re-initiating Clause 37 auto-negotiation is required for the SGMII interface mode to function properly. Signed-off-by: Choong Yong Liang --- drivers/net/pcs/pcs-xpcs-wx.c | 4 +--- drivers/net/pcs/pcs-xpcs.c | 29 +++++++++++++++++++++++++---- 2 files changed, 26 insertions(+), 7 deletions(-) diff --git a/drivers/net/pcs/pcs-xpcs-wx.c b/drivers/net/pcs/pcs-xpcs-wx.c index fc52f7aa5f59..f73ab04d09f0 100644 --- a/drivers/net/pcs/pcs-xpcs-wx.c +++ b/drivers/net/pcs/pcs-xpcs-wx.c @@ -172,11 +172,9 @@ int txgbe_xpcs_switch_mode(struct dw_xpcs *xpcs, phy_interface_t interface) return 0; } - if (xpcs->interface == interface && !txgbe_xpcs_mode_quirk(xpcs)) + if (!txgbe_xpcs_mode_quirk(xpcs)) return 0; - xpcs->interface = interface; - ret = txgbe_pcs_poll_power_up(xpcs); if (ret < 0) return ret; diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c index e32dec4b812e..c506797f9b63 100644 --- a/drivers/net/pcs/pcs-xpcs.c +++ b/drivers/net/pcs/pcs-xpcs.c @@ -602,12 +602,37 @@ static void xpcs_get_interfaces(struct dw_xpcs *xpcs, unsigned long *interfaces) __set_bit(compat->interface, interfaces); } +static int xpcs_switch_interface_mode(struct dw_xpcs *xpcs, + phy_interface_t interface) +{ + int ret = 0; + + if (xpcs->interface != interface) { + if (xpcs->info.pma == WX_TXGBE_XPCS_PMA_10G_ID) { + ret = txgbe_xpcs_switch_mode(xpcs, interface); + if (ret) + return ret; + } else if (interface == PHY_INTERFACE_MODE_SGMII) { + xpcs->need_reset = true; + } + + xpcs->interface = interface; + } + + return 0; +} + static void xpcs_pre_config(struct phylink_pcs *pcs, phy_interface_t interface) { struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs); const struct dw_xpcs_compat *compat; int ret; + ret = xpcs_switch_interface_mode(xpcs, interface); + if (ret) + dev_err(&xpcs->mdiodev->dev, "switch interface failed: %pe\n", + ERR_PTR(ret)); + if (!xpcs->need_reset) return; @@ -799,10 +824,6 @@ static int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface, return -ENODEV; if (xpcs->info.pma == WX_TXGBE_XPCS_PMA_10G_ID) { - ret = txgbe_xpcs_switch_mode(xpcs, interface); - if (ret) - return ret; - /* Wangxun devices need backplane CL37 AN enabled for * SGMII and 1000base-X */