From patchwork Fri Jan 16 16:11:12 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felipe Balbi X-Patchwork-Id: 5649371 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CAA5F9F3A0 for ; Fri, 16 Jan 2015 16:12:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C61C220115 for ; Fri, 16 Jan 2015 16:12:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CC9D220303 for ; Fri, 16 Jan 2015 16:12:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752555AbbAPQMJ (ORCPT ); Fri, 16 Jan 2015 11:12:09 -0500 Received: from devils.ext.ti.com ([198.47.26.153]:38838 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751537AbbAPQMH (ORCPT ); Fri, 16 Jan 2015 11:12:07 -0500 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id t0GGC1IV024544; Fri, 16 Jan 2015 10:12:01 -0600 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id t0GGC1VU015085; Fri, 16 Jan 2015 10:12:01 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.3.174.1; Fri, 16 Jan 2015 10:12:01 -0600 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id t0GGC0FK020823; Fri, 16 Jan 2015 10:12:01 -0600 From: Felipe Balbi To: CC: Tony Lindgren , Linux OMAP Mailing List , , , Felipe Balbi Subject: [patch-net-next v3 2/2] net: ethernet: cpsw: don't requests IRQs we don't use Date: Fri, 16 Jan 2015 10:11:12 -0600 Message-ID: <1421424672-19323-2-git-send-email-balbi@ti.com> X-Mailer: git-send-email 2.2.0 In-Reply-To: <1421424672-19323-1-git-send-email-balbi@ti.com> References: <1421424672-19323-1-git-send-email-balbi@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP CPSW never uses RX_THRESHOLD or MISC interrupts. In fact, they are always kept masked in their appropriate IRQ Enable register. Instead of allocating an IRQ that never fires, it's best to remove that code altogether and let future patches implement it if anybody needs those. Signed-off-by: Felipe Balbi --- combined patches 2 and 3. drivers/net/ethernet/ti/cpsw.c | 72 +++++++++++++++++++----------------------- 1 file changed, 33 insertions(+), 39 deletions(-) diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index 8e1af51e4b76..ba09ff3c1695 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -754,17 +754,25 @@ requeue: dev_kfree_skb_any(new_skb); } -static irqreturn_t cpsw_interrupt(int irq, void *dev_id) +static irqreturn_t cpsw_tx_interrupt(int irq, void *dev_id) { struct cpsw_priv *priv = dev_id; - int value = irq - priv->irqs_table[0]; - /* NOTICE: Ending IRQ here. The trick with the 'value' variable above - * is to make sure we will always write the correct value to the EOI - * register. Namely 0 for RX_THRESH Interrupt, 1 for RX Interrupt, 2 - * for TX Interrupt and 3 for MISC Interrupt. - */ - cpdma_ctlr_eoi(priv->dma, value); + cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX); + cpdma_chan_process(priv->txch, 128); + + priv = cpsw_get_slave_priv(priv, 1); + if (priv) + cpdma_chan_process(priv->txch, 128); + + return IRQ_HANDLED; +} + +static irqreturn_t cpsw_rx_interrupt(int irq, void *dev_id) +{ + struct cpsw_priv *priv = dev_id; + + cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX); cpsw_intr_disable(priv); if (priv->irq_enabled == true) { @@ -1617,7 +1625,8 @@ static void cpsw_ndo_poll_controller(struct net_device *ndev) cpsw_intr_disable(priv); cpdma_ctlr_int_ctrl(priv->dma, false); - cpsw_interrupt(ndev->irq, priv); + cpsw_rx_interrupt(priv->irq[0], priv); + cpsw_tx_interrupt(priv->irq[1], priv); cpdma_ctlr_int_ctrl(priv->dma, true); cpsw_intr_enable(priv); } @@ -2339,62 +2348,47 @@ static int cpsw_probe(struct platform_device *pdev) goto clean_dma_ret; } - ndev->irq = platform_get_irq(pdev, 0); + ndev->irq = platform_get_irq(pdev, 1); if (ndev->irq < 0) { dev_err(priv->dev, "error getting irq resource\n"); ret = -ENOENT; goto clean_ale_ret; } - irq = platform_get_irq(pdev, 0); - if (irq < 0) - goto clean_ale_ret; - - priv->irqs_table[0] = irq; - ret = devm_request_irq(&pdev->dev, irq, cpsw_interrupt, - 0, dev_name(&pdev->dev), priv); - if (ret < 0) { - dev_err(priv->dev, "error attaching irq (%d)\n", ret); - goto clean_ale_ret; - } + /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and + * MISC IRQs which are always kept disabled with this driver so + * we will not request them. + * + * If anyone wants to implement support for those, make sure to + * first request and append them to irqs_table array. + */ + /* RX IRQ */ irq = platform_get_irq(pdev, 1); if (irq < 0) goto clean_ale_ret; - priv->irqs_table[1] = irq; - ret = devm_request_irq(&pdev->dev, irq, cpsw_interrupt, + priv->irqs_table[0] = irq; + ret = devm_request_irq(&pdev->dev, irq, cpsw_rx_interrupt, 0, dev_name(&pdev->dev), priv); if (ret < 0) { dev_err(priv->dev, "error attaching irq (%d)\n", ret); goto clean_ale_ret; } + /* TX IRQ */ irq = platform_get_irq(pdev, 2); if (irq < 0) goto clean_ale_ret; - priv->irqs_table[2] = irq; - ret = devm_request_irq(&pdev->dev, irq, cpsw_interrupt, - 0, dev_name(&pdev->dev), priv); - if (ret < 0) { - dev_err(priv->dev, "error attaching irq (%d)\n", ret); - goto clean_ale_ret; - } - - irq = platform_get_irq(pdev, 3); - if (irq < 0) - goto clean_ale_ret; - - priv->irqs_table[3] = irq; - ret = devm_request_irq(&pdev->dev, irq, cpsw_interrupt, + priv->irqs_table[1] = irq; + ret = devm_request_irq(&pdev->dev, irq, cpsw_tx_interrupt, 0, dev_name(&pdev->dev), priv); if (ret < 0) { dev_err(priv->dev, "error attaching irq (%d)\n", ret); goto clean_ale_ret; } - - priv->num_irqs = 4; + priv->num_irqs = 2; ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;