From patchwork Thu Jun 6 22:28:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Hancock X-Patchwork-Id: 1111483 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=sedsystems.ca Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 45KgM62zlfz9s3l for ; Fri, 7 Jun 2019 08:29:38 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729291AbfFFW3g (ORCPT ); Thu, 6 Jun 2019 18:29:36 -0400 Received: from sed198n136.SEDSystems.ca ([198.169.180.136]:39538 "EHLO sed198n136.sedsystems.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727563AbfFFW30 (ORCPT ); Thu, 6 Jun 2019 18:29:26 -0400 Received: from barney.sedsystems.ca (barney [198.169.180.121]) by sed198n136.sedsystems.ca with ESMTP id x56MTHSn028360 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 6 Jun 2019 16:29:20 -0600 (CST) Received: from SED.RFC1918.192.168.sedsystems.ca (eng1n65.eng.sedsystems.ca [172.21.1.65]) by barney.sedsystems.ca (8.14.7/8.14.4) with ESMTP id x56MTAPB028001 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 6 Jun 2019 16:29:17 -0600 From: Robert Hancock To: netdev@vger.kernel.org Cc: anirudh@xilinx.com, John.Linn@xilinx.com, andrew@lunn.ch, davem@davemloft.net, Robert Hancock Subject: [PATCH net-next v5 12/20] net: axienet: Add optional support for Ethernet core interrupt Date: Thu, 6 Jun 2019 16:28:16 -0600 Message-Id: <1559860104-927-13-git-send-email-hancock@sedsystems.ca> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1559860104-927-1-git-send-email-hancock@sedsystems.ca> References: <1559860104-927-1-git-send-email-hancock@sedsystems.ca> X-Scanned-By: MIMEDefang 2.64 on 198.169.180.136 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Previously this driver only handled interrupts from the DMA RX and TX blocks, not from the Ethernet core itself. Add optional support for the Ethernet core interrupt, which is used to detect rx_missed and framing errors signalled by the hardware. In order to use this interrupt, a third interrupt needs to be specified in the device tree. Signed-off-by: Robert Hancock --- .../devicetree/bindings/net/xilinx_axienet.txt | 3 +- drivers/net/ethernet/xilinx/xilinx_axienet.h | 1 + drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 49 ++++++++++++++++++++++ 3 files changed, 52 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/net/xilinx_axienet.txt b/Documentation/devicetree/bindings/net/xilinx_axienet.txt index 2dea903..0be335c 100644 --- a/Documentation/devicetree/bindings/net/xilinx_axienet.txt +++ b/Documentation/devicetree/bindings/net/xilinx_axienet.txt @@ -18,7 +18,8 @@ Required properties: - compatible : Must be one of "xlnx,axi-ethernet-1.00.a", "xlnx,axi-ethernet-1.01.a", "xlnx,axi-ethernet-2.01.a" - reg : Address and length of the IO space. -- interrupts : Should be a list of two interrupt, TX and RX. +- interrupts : Should be a list of 2 or 3 interrupts: TX DMA, RX DMA, + and optionally Ethernet core. - phy-handle : Should point to the external phy device. See ethernet.txt file in the same directory. - xlnx,rxmem : Set to allocated memory buffer for Rx/Tx in the hardware diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet.h b/drivers/net/ethernet/xilinx/xilinx_axienet.h index 6b6d28f..8e605a8 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet.h +++ b/drivers/net/ethernet/xilinx/xilinx_axienet.h @@ -435,6 +435,7 @@ struct axienet_local { int tx_irq; int rx_irq; + int eth_irq; phy_interface_t phy_mode; u32 options; /* Current options word */ diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c index f733a7a..aa51a6e 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -502,6 +502,8 @@ static void axienet_device_reset(struct net_device *ndev) axienet_status = axienet_ior(lp, XAE_IP_OFFSET); if (axienet_status & XAE_INT_RXRJECT_MASK) axienet_iow(lp, XAE_IS_OFFSET, XAE_INT_RXRJECT_MASK); + axienet_iow(lp, XAE_IE_OFFSET, lp->eth_irq > 0 ? + XAE_INT_RECV_ERROR_MASK : 0); axienet_iow(lp, XAE_FCC_OFFSET, XAE_FCC_FCRX_MASK); @@ -902,6 +904,35 @@ static irqreturn_t axienet_rx_irq(int irq, void *_ndev) return IRQ_HANDLED; } +/** + * axienet_eth_irq - Ethernet core Isr. + * @irq: irq number + * @_ndev: net_device pointer + * + * Return: IRQ_HANDLED if device generated a core interrupt, IRQ_NONE otherwise. + * + * Handle miscellaneous conditions indicated by Ethernet core IRQ. + */ +static irqreturn_t axienet_eth_irq(int irq, void *_ndev) +{ + struct net_device *ndev = _ndev; + struct axienet_local *lp = netdev_priv(ndev); + unsigned int pending; + + pending = axienet_ior(lp, XAE_IP_OFFSET); + if (!pending) + return IRQ_NONE; + + if (pending & XAE_INT_RXFIFOOVR_MASK) + ndev->stats.rx_missed_errors++; + + if (pending & XAE_INT_RXRJECT_MASK) + ndev->stats.rx_frame_errors++; + + axienet_iow(lp, XAE_IS_OFFSET, pending); + return IRQ_HANDLED; +} + static void axienet_dma_err_handler(unsigned long data); /** @@ -962,9 +993,18 @@ static int axienet_open(struct net_device *ndev) ndev->name, ndev); if (ret) goto err_rx_irq; + /* Enable interrupts for Axi Ethernet core (if defined) */ + if (lp->eth_irq > 0) { + ret = request_irq(lp->eth_irq, axienet_eth_irq, IRQF_SHARED, + ndev->name, ndev); + if (ret) + goto err_eth_irq; + } return 0; +err_eth_irq: + free_irq(lp->rx_irq, ndev); err_rx_irq: free_irq(lp->tx_irq, ndev); err_tx_irq: @@ -1028,6 +1068,8 @@ static int axienet_stop(struct net_device *ndev) tasklet_kill(&lp->dma_err_tasklet); + if (lp->eth_irq > 0) + free_irq(lp->eth_irq, ndev); free_irq(lp->tx_irq, ndev); free_irq(lp->rx_irq, ndev); @@ -1491,6 +1533,8 @@ static void axienet_dma_err_handler(unsigned long data) axienet_status = axienet_ior(lp, XAE_IP_OFFSET); if (axienet_status & XAE_INT_RXRJECT_MASK) axienet_iow(lp, XAE_IS_OFFSET, XAE_INT_RXRJECT_MASK); + axienet_iow(lp, XAE_IE_OFFSET, lp->eth_irq > 0 ? + XAE_INT_RECV_ERROR_MASK : 0); axienet_iow(lp, XAE_FCC_OFFSET, XAE_FCC_FCRX_MASK); /* Sync default options with HW but leave receiver and @@ -1660,6 +1704,7 @@ static int axienet_probe(struct platform_device *pdev) } lp->rx_irq = irq_of_parse_and_map(np, 1); lp->tx_irq = irq_of_parse_and_map(np, 0); + lp->eth_irq = irq_of_parse_and_map(np, 2); of_node_put(np); if ((lp->rx_irq <= 0) || (lp->tx_irq <= 0)) { dev_err(&pdev->dev, "could not determine irqs\n"); @@ -1667,6 +1712,10 @@ static int axienet_probe(struct platform_device *pdev) goto free_netdev; } + /* Check for Ethernet core IRQ (optional) */ + if (lp->eth_irq <= 0) + dev_info(&pdev->dev, "Ethernet core IRQ not defined\n"); + /* Retrieve the MAC address */ mac_addr = of_get_mac_address(pdev->dev.of_node); if (IS_ERR(mac_addr)) {