From patchwork Thu Mar 25 17:39:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Voon, Weifeng" X-Patchwork-Id: 12164685 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,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 A79EBC433E3 for ; Thu, 25 Mar 2021 17:40:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8261661A3D for ; Thu, 25 Mar 2021 17:40:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230262AbhCYRjs (ORCPT ); Thu, 25 Mar 2021 13:39:48 -0400 Received: from mga03.intel.com ([134.134.136.65]:27389 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229995AbhCYRj2 (ORCPT ); Thu, 25 Mar 2021 13:39:28 -0400 IronPort-SDR: zf0eU1hiZPsfTDSvJaI0+bm9+LoYjeDd7V6tmyWAIbiPjYCzDr7ypIrXg2ycC5uLrFV/znM91E Q/SjN7XF8L8w== X-IronPort-AV: E=McAfee;i="6000,8403,9934"; a="191016792" X-IronPort-AV: E=Sophos;i="5.81,278,1610438400"; d="scan'208";a="191016792" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2021 10:39:27 -0700 IronPort-SDR: tH3hR0c0An/vBFVND+UGv8IE5bGJ6nZ/uNkYF5gVJM7OALgI5CTVVZIkDW+7gG/0wwXgvqGj3d n+nVIG3tl51w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,278,1610438400"; d="scan'208";a="416112281" Received: from climb.png.intel.com ([10.221.118.165]) by orsmga008.jf.intel.com with ESMTP; 25 Mar 2021 10:39:24 -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: [PATCH v2 net-next 2/5] net: stmmac: make stmmac_interrupt() function more friendly to MSI Date: Fri, 26 Mar 2021 01:39:13 +0800 Message-Id: <20210325173916.13203-3-weifeng.voon@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210325173916.13203-1-weifeng.voon@intel.com> References: <20210325173916.13203-1-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 --- Changes: v1 -> v2 -Remove defensive check for invalid dev pointer --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 54 +++++++++++-------- 1 file changed, 31 insertions(+), 23 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 7c352d017eb2..abe990b9b07b 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -4382,21 +4382,8 @@ static void stmmac_fpe_event_status(struct stmmac_priv *priv, int status) } } -/** - * 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; @@ -4409,13 +4396,6 @@ 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; - if (priv->dma_cap.estsel) stmmac_est_irq_status(priv, priv->ioaddr, priv->dev, &priv->xstats, tx_cnt); @@ -4457,11 +4437,39 @@ 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); + + /* 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);