From patchwork Wed Dec 28 16:40:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 13083073 X-Patchwork-Delegate: kuba@kernel.org 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 E729EC4708E for ; Wed, 28 Dec 2022 16:45:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233617AbiL1QpA (ORCPT ); Wed, 28 Dec 2022 11:45:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37058 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233732AbiL1Qoe (ORCPT ); Wed, 28 Dec 2022 11:44:34 -0500 Received: from mail.3ffe.de (0001.3ffe.de [159.69.201.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F215B1CB1D; Wed, 28 Dec 2022 08:40:15 -0800 (PST) Received: from mwalle01.kontron.local. (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.3ffe.de (Postfix) with ESMTPSA id D7A46164F; Wed, 28 Dec 2022 17:40:13 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2022082101; t=1672245614; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fOtac2haGHAAUtssRyLivkuvpvDLBROt7UT90bRGM7w=; b=SkCJSnkOQzbb51y62g2o9GTW7ibk+LHtcVZDiiZHcOAdYnK5DQaEImB0DZsscfYU1X2mwb kU9LU6+psIJjOpWlNu9zFNrs1AhFgaixgpqwoYfUppjaN8RJdu4E4DVl1oMlpZ2wWS5Kzh E1nsID//If9yDHArPYbIueNCIpcxMz2j0S2saiE3/09GwhEGmbNT/54jsg8A7C6mWUFnjo UzShh5ffQtfmiU8sIhmJavL0+e3Be7w/gTn9nld0T5Qw3+VIgTY3wgQR9JC8Wx29TS/RML lHf26yoenBQqHtFbCx8BdWX/+0FlI/X+qwAXwdYqcbXCn5TFeFmP766W+7KpZA== From: Michael Walle To: Xu Liang , Andrew Lunn , Heiner Kallweit , Russell King , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Michael Walle Subject: [PATCH RFC net-next v2 1/2] net: phy: allow a phy to opt-out of interrupt handling Date: Wed, 28 Dec 2022 17:40:07 +0100 Message-Id: <20221228164008.1653348-2-michael@walle.cc> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221228164008.1653348-1-michael@walle.cc> References: <20221228164008.1653348-1-michael@walle.cc> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Until now, it is not possible for a PHY driver to disable interrupts during runtime. If a driver offers the .config_intr() as well as the .handle_interrupt() ops, it is eligible for interrupt handling. Introduce a new flag for the dev_flags property of struct phy_device, which can be set by PHY driver to skip interrupt setup and fall back to polling mode. At the moment, this is used for the MaxLinear PHY which has broken interrupt handling and there is a need to disable interrupts in some cases. Signed-off-by: Michael Walle --- drivers/net/phy/phy_device.c | 7 +++++++ include/linux/phy.h | 2 ++ 2 files changed, 9 insertions(+) diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 716870a4499c..e4562859ac00 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1487,6 +1487,13 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, phydev->interrupts = PHY_INTERRUPT_DISABLED; + /* PHYs can request to use poll mode even though they have an + * associated interrupt line. This could be the case if they + * detect a broken interrupt handling. + */ + if (phydev->dev_flags & PHY_F_NO_IRQ) + phydev->irq = PHY_POLL; + /* Port is set to PORT_TP by default and the actual PHY driver will set * it to different value depending on the PHY configuration. If we have * the generic PHY driver we can't figure it out, thus set the old diff --git a/include/linux/phy.h b/include/linux/phy.h index 71eeb4e3b1fd..f1566c7e47a8 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -82,6 +82,8 @@ extern const int phy_10gbit_features_array[1]; #define PHY_POLL_CABLE_TEST 0x00000004 #define MDIO_DEVICE_IS_PHY 0x80000000 +#define PHY_F_NO_IRQ 0x80000000 + /** * enum phy_interface_t - Interface Mode definitions *