From patchwork Tue Jan 31 19:03:19 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Iyappan Subramanian X-Patchwork-Id: 722185 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3vCbLn3rzfz9ryk for ; Wed, 1 Feb 2017 06:05:37 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=apm.com header.i=@apm.com header.b="oKp/Bh2r"; dkim-atps=neutral Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751999AbdAaTFg (ORCPT ); Tue, 31 Jan 2017 14:05:36 -0500 Received: from mail-pf0-f174.google.com ([209.85.192.174]:36092 "EHLO mail-pf0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751817AbdAaTFS (ORCPT ); Tue, 31 Jan 2017 14:05:18 -0500 Received: by mail-pf0-f174.google.com with SMTP id 189so110094585pfu.3 for ; Tue, 31 Jan 2017 11:03:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=apm.com; s=apm; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=O5aiFH1aQXklrw195Cy+NdkOYraUXp/Y3gPjZ49vtMU=; b=oKp/Bh2rCmj3rkjjO2zEl/kG22K1r1DxdcWkoqXPxKL+xM7RvANsNf5lpUSNy2CU1z p9nayF1kBDNigtIBia2SHwm4jV8f3vSq2DBgkjn9qH5ZjDj4T71B0mwZH+A7M6rD8Yzn vGWAgTAXoB0s0o2PYDZIEhjvD0E/6om3Pm3vk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=O5aiFH1aQXklrw195Cy+NdkOYraUXp/Y3gPjZ49vtMU=; b=UxgvX4U69ZkftCgubbHhRGFPDvMH2/Rtx+wrXUHC5tgA7cKEHxyq6ffY12Wnmz3lfP FTcu/NEgK+diyfU+Fmpl/+qcgVTcodp10P2OY1NU9VJECblyYlMXoipZvQDDukJ+PvRu mXIeWnhzIP6J9xhnl5j5Qr6tM3+hMuq9yGaHLllf6HutcX6ZexmHwyKNhyZYtuX9VDeG X9cRCZkL7SCfS8sslpUvGrwal2n3fzwwvKyFz59i3AcKs9rEtgzx6TIZ9Fm7tyf+Wz4V tx/YS+i8FTso4KjnSLigf9hW/HipnYiFHbDg5XdxJbVbWmt1aKZrJLfg2aePwvvBeOMF MU/w== X-Gm-Message-State: AIkVDXIYFRJ65jsfGTY61zH4FoCVtJ/WKJMw6EQSj0HSu3m1Xp0t8dGS93G1RlvXRb5cKHZW X-Received: by 10.99.55.26 with SMTP id e26mr32546182pga.15.1485889406431; Tue, 31 Jan 2017 11:03:26 -0800 (PST) Received: from isubrama-dev.amcc.com ([206.80.4.98]) by smtp.gmail.com with ESMTPSA id f65sm43106754pfk.5.2017.01.31.11.03.25 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 31 Jan 2017 11:03:25 -0800 (PST) From: Iyappan Subramanian To: davem@davemloft.net, netdev@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, patches@apm.com, kchudgar@apm.com, Iyappan Subramanian Subject: [PATCH net-next 4/6] drivers: net: xgene-v2: Add base driver Date: Tue, 31 Jan 2017 11:03:19 -0800 Message-Id: <1485889401-13909-5-git-send-email-isubramanian@apm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1485889401-13909-1-git-send-email-isubramanian@apm.com> References: <1485889401-13909-1-git-send-email-isubramanian@apm.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch adds, - probe, remove, shutdown - open, close and stats - create and delete ring - request and delete irq Signed-off-by: Iyappan Subramanian Signed-off-by: Keyur Chudgar --- drivers/net/ethernet/apm/xgene-v2/main.c | 459 +++++++++++++++++++++++++++++++ 1 file changed, 459 insertions(+) create mode 100644 drivers/net/ethernet/apm/xgene-v2/main.c diff --git a/drivers/net/ethernet/apm/xgene-v2/main.c b/drivers/net/ethernet/apm/xgene-v2/main.c new file mode 100644 index 0000000..3881f27 --- /dev/null +++ b/drivers/net/ethernet/apm/xgene-v2/main.c @@ -0,0 +1,459 @@ +/* + * Applied Micro X-Gene SoC Ethernet v2 Driver + * + * Copyright (c) 2017, Applied Micro Circuits Corporation + * Author(s): Iyappan Subramanian + * Keyur Chudgar + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include "main.h" + +static const struct acpi_device_id xge_acpi_match[]; + +static int xge_get_resources(struct xge_pdata *pdata) +{ + struct platform_device *pdev; + struct net_device *ndev; + struct device *dev; + struct resource *res; + int phy_mode, ret = 0; + + pdev = pdata->pdev; + dev = &pdev->dev; + ndev = pdata->ndev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "Resource enet_csr not defined\n"); + return -ENODEV; + } + + pdata->resources.base_addr = devm_ioremap(dev, res->start, + resource_size(res)); + if (!pdata->resources.base_addr) { + dev_err(dev, "Unable to retrieve ENET Port CSR region\n"); + return -ENOMEM; + } + + if (!device_get_mac_address(dev, ndev->dev_addr, ETH_ALEN)) + eth_hw_addr_random(ndev); + + memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len); + + phy_mode = device_get_phy_mode(dev); + if (phy_mode < 0) { + dev_err(dev, "Unable to get phy-connection-type\n"); + return phy_mode; + } + pdata->resources.phy_mode = phy_mode; + + if (pdata->resources.phy_mode != PHY_INTERFACE_MODE_RGMII) { + dev_err(dev, "Incorrect phy-connection-type specified\n"); + return -ENODEV; + } + + ret = platform_get_irq(pdev, 0); + if (ret <= 0) { + dev_err(dev, "Unable to get ENET IRQ\n"); + ret = ret ? : -ENXIO; + return ret; + } + pdata->resources.irq = ret; + + return 0; +} + +static void xge_delete_desc_rings(struct net_device *ndev) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + struct device *dev = &pdata->pdev->dev; + struct xge_desc_ring *ring; + + ring = pdata->tx_ring; + if (ring) { + if (ring->skbs) + devm_kfree(dev, ring->skbs); + if (ring->pkt_bufs) + devm_kfree(dev, ring->pkt_bufs); + devm_kfree(dev, ring); + } + + ring = pdata->rx_ring; + if (ring) { + if (ring->skbs) + devm_kfree(dev, ring->skbs); + devm_kfree(dev, ring); + } +} + +static struct xge_desc_ring *xge_create_desc_ring(struct net_device *ndev) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + struct device *dev = &pdata->pdev->dev; + struct xge_desc_ring *ring; + u16 size; + + ring = devm_kzalloc(dev, sizeof(struct xge_desc_ring), GFP_KERNEL); + if (!ring) + return NULL; + + ring->ndev = ndev; + + size = XGENE_ENET_DESC_SIZE * XGENE_ENET_NUM_DESC; + ring->desc_addr = dmam_alloc_coherent(dev, size, &ring->dma_addr, + GFP_KERNEL | __GFP_ZERO); + if (!ring->desc_addr) { + devm_kfree(dev, ring); + return NULL; + } + + xge_setup_desc(ring); + + return ring; +} + +static int xge_refill_buffers(struct net_device *ndev, u32 nbuf) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + struct xge_desc_ring *ring = pdata->rx_ring; + const u8 slots = XGENE_ENET_NUM_DESC - 1; + struct device *dev = &pdata->pdev->dev; + struct xge_raw_desc *raw_desc; + u64 addr_lo, addr_hi; + u8 tail = ring->tail; + struct sk_buff *skb; + dma_addr_t dma_addr; + u16 len; + int i; + + for (i = 0; i < nbuf; i++) { + raw_desc = &ring->raw_desc[tail]; + + len = XGENE_ENET_STD_MTU; + skb = netdev_alloc_skb(ndev, len); + if (unlikely(!skb)) + return -ENOMEM; + + dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE); + if (dma_mapping_error(dev, dma_addr)) { + netdev_err(ndev, "DMA mapping error\n"); + dev_kfree_skb_any(skb); + return -EINVAL; + } + + addr_hi = GET_BITS(NEXT_DESC_ADDRH, le64_to_cpu(raw_desc->m1)); + addr_lo = GET_BITS(NEXT_DESC_ADDRL, le64_to_cpu(raw_desc->m1)); + raw_desc->m1 = cpu_to_le64(SET_BITS(NEXT_DESC_ADDRL, addr_lo) | + SET_BITS(NEXT_DESC_ADDRH, addr_hi) | + SET_BITS(PKT_ADDRH, + dma_addr >> PKT_ADDRL_LEN)); + + dma_wmb(); + raw_desc->m0 = cpu_to_le64(SET_BITS(PKT_ADDRL, dma_addr) | + SET_BITS(E, 1)); + ring->skbs[tail] = skb; + tail = (tail + 1) & slots; + } + + ring->tail = tail; + + return 0; +} + +static int xge_create_desc_rings(struct net_device *ndev) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + struct device *dev = &pdata->pdev->dev; + struct xge_desc_ring *ring; + int ret; + + /* create tx ring */ + ring = xge_create_desc_ring(ndev); + if (!ring) + return -ENOMEM; + + ring->skbs = devm_kcalloc(dev, XGENE_ENET_NUM_DESC, + sizeof(struct sk_buff *), GFP_KERNEL); + if (!ring->skbs) + goto err; + + ring->pkt_bufs = devm_kcalloc(dev, XGENE_ENET_NUM_DESC, + sizeof(void *), GFP_KERNEL); + if (!ring->pkt_bufs) + goto err; + + pdata->tx_ring = ring; + xge_update_tx_desc_addr(pdata); + + /* create rx ring */ + ring = xge_create_desc_ring(ndev); + if (!ring) + goto err; + + ring->skbs = devm_kcalloc(dev, XGENE_ENET_NUM_DESC, + sizeof(struct sk_buff *), GFP_KERNEL); + if (!ring->skbs) + goto err; + + pdata->rx_ring = ring; + xge_update_rx_desc_addr(pdata); + + ret = xge_refill_buffers(ndev, XGENE_ENET_NUM_DESC); + if (!ret) + return 0; + +err: + xge_delete_desc_rings(ndev); + + return -ENOMEM; +} + +static int xge_init_hw(struct net_device *ndev) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + int ret; + + ret = xge_port_reset(ndev); + if (ret) + return ret; + + xge_create_desc_rings(ndev); + xge_port_init(ndev); + pdata->nbufs = NUM_BUFS; + + return 0; +} + +static irqreturn_t xge_irq(const int irq, void *data) +{ + struct xge_pdata *pdata = data; + + if (napi_schedule_prep(&pdata->napi)) { + xge_intr_disable(pdata); + __napi_schedule(&pdata->napi); + } + + return IRQ_HANDLED; +} + +static int xge_request_irq(struct net_device *ndev) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + struct device *dev = &pdata->pdev->dev; + int ret; + + snprintf(pdata->irq_name, IRQ_ID_SIZE, "%s", ndev->name); + + ret = devm_request_irq(dev, pdata->resources.irq, xge_irq, + 0, pdata->irq_name, pdata); + if (ret) + netdev_err(ndev, "Failed to request irq %s\n", pdata->irq_name); + + return ret; +} + +static void xge_free_irq(struct net_device *ndev) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + struct device *dev = &pdata->pdev->dev; + + devm_free_irq(dev, pdata->resources.irq, pdata); +} + +static int xge_open(struct net_device *ndev) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + int ret; + + ret = xge_request_irq(ndev); + if (ret) + return ret; + + xge_intr_enable(pdata); + + xge_wr_csr(pdata, DMARXCTRL, 1); + xge_mac_enable(pdata); + netif_start_queue(ndev); + + return 0; +} + +static int xge_close(struct net_device *ndev) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + + netif_stop_queue(ndev); + xge_mac_disable(pdata); + + xge_free_irq(ndev); + + return 0; +} + +static int xge_set_mac_addr(struct net_device *ndev, void *addr) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + int ret; + + ret = eth_mac_addr(ndev, addr); + if (ret) + return ret; + + xge_mac_set_station_addr(pdata); + + return 0; +} + +static void xge_timeout(struct net_device *ndev) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + struct netdev_queue *txq; + + xge_mac_reset(pdata); + + txq = netdev_get_tx_queue(ndev, 0); + txq->trans_start = jiffies; + netif_tx_start_queue(txq); +} + +static void xge_get_stats64(struct net_device *ndev, + struct rtnl_link_stats64 *storage) +{ + struct xge_pdata *pdata = netdev_priv(ndev); + struct xge_stats *stats = &pdata->stats; + + storage->tx_packets += stats->tx_packets; + storage->tx_bytes += stats->tx_bytes; + + storage->rx_packets += stats->rx_packets; + storage->rx_bytes += stats->rx_bytes; +} + +static const struct net_device_ops xgene_ndev_ops = { + .ndo_open = xge_open, + .ndo_stop = xge_close, + .ndo_set_mac_address = xge_set_mac_addr, + .ndo_tx_timeout = xge_timeout, + .ndo_get_stats64 = xge_get_stats64, +}; + +static int xge_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct net_device *ndev; + struct xge_pdata *pdata; + int ret; + + ndev = alloc_etherdev(sizeof(struct xge_pdata)); + if (!ndev) + return -ENOMEM; + + pdata = netdev_priv(ndev); + + pdata->pdev = pdev; + pdata->ndev = ndev; + SET_NETDEV_DEV(ndev, dev); + platform_set_drvdata(pdev, pdata); + ndev->netdev_ops = &xgene_ndev_ops; + + ndev->features |= NETIF_F_GSO | + NETIF_F_GRO; + + ret = xge_get_resources(pdata); + if (ret) + goto err; + + ndev->hw_features = ndev->features; + + ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64)); + if (ret) { + netdev_err(ndev, "No usable DMA configuration\n"); + goto err; + } + + ret = xge_init_hw(ndev); + if (ret) + goto err; + + ret = register_netdev(ndev); + if (ret) { + netdev_err(ndev, "Failed to register netdev\n"); + goto err; + } + + return 0; + +err: + free_netdev(ndev); + + return ret; +} + +static int xge_remove(struct platform_device *pdev) +{ + struct xge_pdata *pdata; + struct net_device *ndev; + + pdata = platform_get_drvdata(pdev); + ndev = pdata->ndev; + + rtnl_lock(); + if (netif_running(ndev)) + dev_close(ndev); + rtnl_unlock(); + + unregister_netdev(ndev); + xge_delete_desc_rings(ndev); + free_netdev(ndev); + + return 0; +} + +static void xge_shutdown(struct platform_device *pdev) +{ + struct xge_pdata *pdata; + + pdata = platform_get_drvdata(pdev); + if (!pdata) + return; + + if (!pdata->ndev) + return; + + xge_remove(pdev); +} + +static const struct acpi_device_id xge_acpi_match[] = { + { "APMC0D80" }, + { } +}; +MODULE_DEVICE_TABLE(acpi, xge_acpi_match); + +static struct platform_driver xge_driver = { + .driver = { + .name = "xgene-enet-v2", + .acpi_match_table = ACPI_PTR(xge_acpi_match), + }, + .probe = xge_probe, + .remove = xge_remove, + .shutdown = xge_shutdown, +}; +module_platform_driver(xge_driver); + +MODULE_DESCRIPTION("APM X-Gene SoC Ethernet v2 driver"); +MODULE_AUTHOR("Iyappan Subramanian "); +MODULE_VERSION(XGENE_ENET_V2_VERSION); +MODULE_LICENSE("GPL");