From patchwork Tue Mar 16 12:18:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Voon, Weifeng" X-Patchwork-Id: 12142091 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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 652A4C433E9 for ; Tue, 16 Mar 2021 12:19:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3271F65032 for ; Tue, 16 Mar 2021 12:19:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230393AbhCPMS5 (ORCPT ); Tue, 16 Mar 2021 08:18:57 -0400 Received: from mga11.intel.com ([192.55.52.93]:42290 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229780AbhCPMSg (ORCPT ); Tue, 16 Mar 2021 08:18:36 -0400 IronPort-SDR: Plc3mn94UQQix6/XESgVwwTGtyQD4qNb9kevwCAndgqXMy1nFmGLXn9m1DN6rEcCLvC2hfbAZ+ creGGiwHiZ1g== X-IronPort-AV: E=McAfee;i="6000,8403,9924"; a="185886806" X-IronPort-AV: E=Sophos;i="5.81,251,1610438400"; d="scan'208";a="185886806" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Mar 2021 05:18:36 -0700 IronPort-SDR: aVUEUAMqVN56QXbNGhmmfrSAi/YulYPIaRHqBg9qMrD9XTAG4hh1gjlIvprSIByHWF2B+3UeyS sLAR07KzOmmQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,251,1610438400"; d="scan'208";a="449703405" Received: from climb.png.intel.com ([10.221.118.165]) by orsmga001.jf.intel.com with ESMTP; 16 Mar 2021 05:18:33 -0700 From: Voon Weifeng To: "David S . Miller" , Maxime Coquelin Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Jose Abreu , Jakub Kicinski , Giuseppe Cavallaro , Andrew Lunn , Alexandre Torgue , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, Ong Boon Leong , Voon Weifeng , Wong Vee Khee Subject: [RESEND v1 net-next 2/5] net: stmmac: make stmmac_interrupt() function more friendly to MSI Date: Tue, 16 Mar 2021 20:18:20 +0800 Message-Id: <20210316121823.18659-3-weifeng.voon@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210316121823.18659-1-weifeng.voon@intel.com> References: <20210316121823.18659-1-weifeng.voon@intel.com> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Ong Boon Leong Refactor stmmac_interrupt() by introducing stmmac_common_interrupt() so that we prepare the ISR operation to be friendly to MSI later. Signed-off-by: Ong Boon Leong Signed-off-by: Voon Weifeng --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 59 +++++++++++-------- 1 file changed, 36 insertions(+), 23 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 53da3c855cba..741b100c8971 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -4253,21 +4253,8 @@ static int stmmac_set_features(struct net_device *netdev, return 0; } -/** - * stmmac_interrupt - main ISR - * @irq: interrupt number. - * @dev_id: to pass the net device pointer (must be valid). - * Description: this is the main driver interrupt service routine. - * It can call: - * o DMA service routine (to manage incoming frame reception and transmission - * status) - * o Core interrupts to manage: remote wake-up, management counter, LPI - * interrupts. - */ -static irqreturn_t stmmac_interrupt(int irq, void *dev_id) +static void stmmac_common_interrupt(struct stmmac_priv *priv) { - struct net_device *dev = (struct net_device *)dev_id; - struct stmmac_priv *priv = netdev_priv(dev); u32 rx_cnt = priv->plat->rx_queues_to_use; u32 tx_cnt = priv->plat->tx_queues_to_use; u32 queues_count; @@ -4280,13 +4267,6 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id) if (priv->irq_wake) pm_wakeup_event(priv->device, 0); - /* Check if adapter is up */ - if (test_bit(STMMAC_DOWN, &priv->state)) - return IRQ_HANDLED; - /* Check if a fatal error happened */ - if (stmmac_safety_feat_interrupt(priv)) - return IRQ_HANDLED; - /* To handle GMAC own interrupts */ if ((priv->plat->has_gmac) || xmac) { int status = stmmac_host_irq_status(priv, priv->hw, &priv->xstats); @@ -4317,11 +4297,44 @@ static irqreturn_t stmmac_interrupt(int irq, void *dev_id) /* PCS link status */ if (priv->hw->pcs) { if (priv->xstats.pcs_link) - netif_carrier_on(dev); + netif_carrier_on(priv->dev); else - netif_carrier_off(dev); + netif_carrier_off(priv->dev); } } +} + +/** + * stmmac_interrupt - main ISR + * @irq: interrupt number. + * @dev_id: to pass the net device pointer. + * Description: this is the main driver interrupt service routine. + * It can call: + * o DMA service routine (to manage incoming frame reception and transmission + * status) + * o Core interrupts to manage: remote wake-up, management counter, LPI + * interrupts. + */ +static irqreturn_t stmmac_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *)dev_id; + struct stmmac_priv *priv = netdev_priv(dev); + + if (unlikely(!dev)) { + netdev_err(priv->dev, "%s: invalid dev pointer\n", __func__); + return IRQ_NONE; + } + + /* Check if adapter is up */ + if (test_bit(STMMAC_DOWN, &priv->state)) + return IRQ_HANDLED; + + /* Check if a fatal error happened */ + if (stmmac_safety_feat_interrupt(priv)) + return IRQ_HANDLED; + + /* To handle Common interrupts */ + stmmac_common_interrupt(priv); /* To handle DMA interrupts */ stmmac_dma_interrupt(priv);