From patchwork Fri May 31 18:15:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Hancock X-Patchwork-Id: 1108524 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 45FtLB6dhsz9s4V for ; Sat, 1 Jun 2019 04:30:42 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727207AbfEaSal (ORCPT ); Fri, 31 May 2019 14:30:41 -0400 Received: from sed198n136.SEDSystems.ca ([198.169.180.136]:25532 "EHLO sed198n136.sedsystems.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727144AbfEaSa2 (ORCPT ); Fri, 31 May 2019 14:30:28 -0400 X-Greylist: delayed 854 seconds by postgrey-1.27 at vger.kernel.org; Fri, 31 May 2019 14:30:19 EDT Received: from barney.sedsystems.ca (barney [198.169.180.121]) by sed198n136.sedsystems.ca with ESMTP id x4VIGFI0022158 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 31 May 2019 12:16:16 -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 x4VIG5Du043766 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 31 May 2019 12:16:15 -0600 From: Robert Hancock To: netdev@vger.kernel.org Cc: anirudh@xilinx.com, John.Linn@xilinx.com, Robert Hancock Subject: [PATCH net-next 12/13] net: axienet: make use of axistream-connected attribute optional Date: Fri, 31 May 2019 12:15:44 -0600 Message-Id: <1559326545-28825-13-git-send-email-hancock@sedsystems.ca> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1559326545-28825-1-git-send-email-hancock@sedsystems.ca> References: <1559326545-28825-1-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 Currently the axienet driver requires the use of a second devicetree node, referenced by an axistream-connected attribute on the Ethernet device node, which contains the resources for the AXI DMA block used by the device. This setup is problematic for a use case we have where the Ethernet and DMA cores are behind a PCIe to AXI bridge and the memory resources for the nodes are injected into the platform devices using the multifunction device subsystem - it's not easily possible for the driver to obtain the platform-level resources from the linked device. In order to simplify that usage model, and simplify the overall use of this driver in general, allow for all of the resources to be kept on one node where the resources are retrieved using platform device APIs rather than device-tree-specific ones. The previous usage setup is still supported if the axistream-connected attribute is specified. Signed-off-by: Robert Hancock --- drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 43 +++++++++++++++-------- 1 file changed, 28 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c index 3112724..82caf04 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -1577,7 +1577,7 @@ static int axienet_probe(struct platform_device *pdev) struct axienet_local *lp; struct net_device *ndev; const void *mac_addr; - struct resource *ethres, dmares; + struct resource *ethres; u32 value; ndev = alloc_etherdev(sizeof(*lp)); @@ -1695,28 +1695,41 @@ static int axienet_probe(struct platform_device *pdev) /* Find the DMA node, map the DMA registers, and decode the DMA IRQs */ np = of_parse_phandle(pdev->dev.of_node, "axistream-connected", 0); - if (!np) { - dev_err(&pdev->dev, "could not find DMA node\n"); - ret = -ENODEV; - goto free_netdev; - } - ret = of_address_to_resource(np, 0, &dmares); - if (ret) { - dev_err(&pdev->dev, "unable to get DMA resource\n"); + if (np) { + struct resource dmares; + + ret = of_address_to_resource(np, 0, &dmares); + if (ret) { + dev_err(&pdev->dev, + "unable to get DMA resource\n"); + of_node_put(np); + goto free_netdev; + } + lp->dma_regs = devm_ioremap_resource(&pdev->dev, + &dmares); + lp->rx_irq = irq_of_parse_and_map(np, 1); + lp->tx_irq = irq_of_parse_and_map(np, 0); of_node_put(np); - goto free_netdev; + lp->eth_irq = platform_get_irq(pdev, 0); + } else { + /* Check for these resources directly on the Ethernet node. */ + struct resource *res = platform_get_resource(pdev, + IORESOURCE_MEM, 1); + if (!res) { + dev_err(&pdev->dev, "unable to get DMA memory resource\n"); + goto free_netdev; + } + lp->dma_regs = devm_ioremap_resource(&pdev->dev, res); + lp->rx_irq = platform_get_irq(pdev, 1); + lp->tx_irq = platform_get_irq(pdev, 0); + lp->eth_irq = platform_get_irq(pdev, 2); } - lp->dma_regs = devm_ioremap_resource(&pdev->dev, &dmares); if (IS_ERR(lp->dma_regs)) { dev_err(&pdev->dev, "could not map DMA regs\n"); ret = PTR_ERR(lp->dma_regs); of_node_put(np); goto free_netdev; } - 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"); ret = -ENOMEM;