From patchwork Thu Mar 20 22:23:51 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Byungho An X-Patchwork-Id: 3868171 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 682329F388 for ; Thu, 20 Mar 2014 22:25:53 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 61AA020218 for ; Thu, 20 Mar 2014 22:25:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 32AA9201E4 for ; Thu, 20 Mar 2014 22:25:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759872AbaCTWY6 (ORCPT ); Thu, 20 Mar 2014 18:24:58 -0400 Received: from mailout2.samsung.com ([203.254.224.25]:19118 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759898AbaCTWX4 (ORCPT ); Thu, 20 Mar 2014 18:23:56 -0400 Received: from epcpsbgr1.samsung.com (u141.gpu120.samsung.co.kr [203.254.230.141]) by mailout2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N2R007YHA7UN650@mailout2.samsung.com>; Fri, 21 Mar 2014 07:23:54 +0900 (KST) Received: from epcpsbgm1.samsung.com ( [203.254.230.50]) by epcpsbgr1.samsung.com (EPCPMTA) with SMTP id BA.95.12635.A7A6B235; Fri, 21 Mar 2014 07:23:54 +0900 (KST) X-AuditID: cbfee68d-b7fcd6d00000315b-c7-532b6a7a5bf9 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id 65.D8.29263.A7A6B235; Fri, 21 Mar 2014 07:23:54 +0900 (KST) Received: from VISITOR1LAB ([105.128.34.229]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0N2R0047WA7H8B90@mmp1.samsung.com>; Fri, 21 Mar 2014 07:23:54 +0900 (KST) From: Byungho An To: netdev@vger.kernel.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org Cc: 'David Miller' , ks.giri@samsung.com, siva.kallam@samsung.com, vipul.pandya@samsung.com, ilho215.lee@samsung.com Subject: [PATCH V9 5/7] net: sxgbe: add Checksum offload support for Samsung sxgbe Date: Thu, 20 Mar 2014 15:23:51 -0700 Message-id: <000601cf448b$13191eb0$394b5c10$@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Mailer: Microsoft Outlook 14.0 Thread-index: Ac9EiqHQWtIWS6xAS5CT7ODo0upusg== Content-language: en-us X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrMIsWRmVeSWpSXmKPExsVy+t8zI92qLO1gg+8XlCzmnG9hsZh/5Byr xdF/Cxkt5h/dwWQx4/w+JotjC8QsVjRtZbTYtuACswOHx5aVN5k8+rasYvT4vEkugDmKyyYl NSezLLVI3y6BK+Px/V6Wgu2WFY927GJrYFyj38XIwSEhYCIx/4ZzFyMnkCkmceHeerYuRi4O IYFljBIrJ11lh0iYSKw8OZEJxBYSWMQo8XddHkTRX0aJ+32PGUESbAJqEs0zL7OB2CIC0RI7 jkwEm8Qs0M0o8WnFfrCEsECIxO7HPWA2i4CqRP+t7ewgV/AKWEo0ntcBCfMKCEr8mHyPBcRm FtCSWL/zOBOELS+xec1bZoiDFCR2nH3NCLFLT+LQks2MEDXiEpMePGQH2SshcI5dYsHGrywQ uwQkvk0+xALxsazEpgNQcyQlDq64wTKBUWwWktWzkKyehWT1LCQrFjCyrGIUTS1ILihOSi8y 1CtOzC0uzUvXS87P3cQIicDeHYy3D1gfYkwGWj+RWUo0OR8YwXkl8YbGZkYWpiamxkbmlmak CSuJ8yY9TAoSEkhPLEnNTk0tSC2KLyrNSS0+xMjEwSnVwDhjW9vSM6LOYdIZZVHOtzturPWa uang8t2KV5N2Pwvexr+mxG3+DwUzJ770GzNaFCb8zP23yORB6HqpTqGOHrV/t7xmtr2e8zH3 6s3CSZvmPe2tN5d+790SGq+QHWXpHubZPmGv2baW6doc+yOr3whNS44qu3tyzbbkivf3BfZ8 idB1fpD80kCJpTgj0VCLuag4EQC6+Pye1gIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrIKsWRmVeSWpSXmKPExsVy+t9jAd2qLO1gg40XZSzmnG9hsZh/5Byr xdF/Cxkt5h/dwWQx4/w+JotjC8QsVjRtZbTYtuACswOHx5aVN5k8+rasYvT4vEkugDmqgdEm IzUxJbVIITUvOT8lMy/dVsk7ON453tTMwFDX0NLCXEkhLzE31VbJxSdA1y0zB+gCJYWyxJxS oFBAYnGxkr4dpgmhIW66FjCNEbq+IUFwPUYGaCBhHWPG4/u9LAXbLSse7djF1sC4Rr+LkZND QsBEYuXJiUwQtpjEhXvr2UBsIYFFjBJ/1+V1MXIB2X8ZJe73PWYESbAJqEk0z7wMViQiEC2x 48hENpAiZoFuRolPK/aDJYQFQiR2P+4Bs1kEVCX6b21n72Lk4OAVsJRoPK8DEuYVEJT4Mfke C4jNLKAlsX7ncSYIW15i85q3zBAHKUjsOPuaEWKXnsShJZsZIWrEJSY9eMg+gVFgFpJRs5CM moVk1CwkLQsYWVYxiqYWJBcUJ6XnGuoVJ+YWl+al6yXn525iBEf4M6kdjCsbLA4xCnAwKvHw VnBqBwuxJpYVV+YeYpTgYFYS4T0fCxTiTUmsrEotyo8vKs1JLT7EmAz06ERmKdHkfGDyySuJ NzQ2MTOyNDKzMDIxNydNWEmc90CrdaCQQHpiSWp2ampBahHMFiYOTqkGxrQVOVkB09bMtFo9 x2Rtn/GTbVvFPV56CC7aZiZXqKumubd325WIXwlb1mZYMD/Mc5Z7GrTgosKu1I2KLFmTDjVs n3BBJkYg+2rBxbf7Vtyeu0sr2vHgvVt8Cwvmbu4+xuAtu+7QosPP3JS3dhovfzxL7o6bcxvj Fo21tU5vue4e0U16VKe/S0yJpTgj0VCLuag4EQADcP2oNAMAAA== DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@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 From: Vipul Pandya This patch adds TX and RX checksum offload support. Signed-off-by: Vipul Pandya Neatening-by: Joe Perches Signed-off-by: Byungho An --- drivers/net/ethernet/samsung/sxgbe/sxgbe_common.h | 5 +++ drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c | 20 +++++++++ drivers/net/ethernet/samsung/sxgbe/sxgbe_desc.h | 6 +-- drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c | 46 ++++++++++++++++----- 4 files changed, 63 insertions(+), 14 deletions(-) diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_common.h b/drivers/net/ethernet/samsung/sxgbe/sxgbe_common.h index 5f1d02c..f06d439 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_common.h +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_common.h @@ -337,6 +337,10 @@ struct sxgbe_core_ops { void (*set_eee_timer)(void __iomem *ioaddr, const int ls, const int tw); void (*set_eee_pls)(void __iomem *ioaddr, const int link); + + /* Enable disable checksum offload operations */ + void (*enable_rx_csum)(void __iomem *ioaddr); + void (*disable_rx_csum)(void __iomem *ioaddr); }; const struct sxgbe_core_ops *sxgbe_get_core_ops(void); @@ -449,6 +453,7 @@ struct sxgbe_priv_data { struct sxgbe_ops *hw; /* sxgbe specific ops */ int no_csum_insertion; int irq; + int rxcsum_insertion; spinlock_t stats_lock; /* lock for tx/rx statatics */ struct phy_device *phydev; diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c index bf93b16..5885fd6 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c @@ -217,6 +217,24 @@ static void sxgbe_set_eee_timer(void __iomem *ioaddr, writel(value, ioaddr + SXGBE_CORE_LPI_TIMER_CTRL); } +static void sxgbe_enable_rx_csum(void __iomem *ioaddr) +{ + u32 ctrl; + + ctrl = readl(ioaddr + SXGBE_CORE_RX_CONFIG_REG); + ctrl |= SXGBE_RX_CSUMOFFLOAD_ENABLE; + writel(ctrl, ioaddr + SXGBE_CORE_RX_CONFIG_REG); +} + +static void sxgbe_disable_rx_csum(void __iomem *ioaddr) +{ + u32 ctrl; + + ctrl = readl(ioaddr + SXGBE_CORE_RX_CONFIG_REG); + ctrl &= ~SXGBE_RX_CSUMOFFLOAD_ENABLE; + writel(ctrl, ioaddr + SXGBE_CORE_RX_CONFIG_REG); +} + const struct sxgbe_core_ops core_ops = { .core_init = sxgbe_core_init, .dump_regs = sxgbe_core_dump_regs, @@ -233,6 +251,8 @@ const struct sxgbe_core_ops core_ops = { .reset_eee_mode = sxgbe_reset_eee_mode, .set_eee_timer = sxgbe_set_eee_timer, .set_eee_pls = sxgbe_set_eee_pls, + .enable_rx_csum = sxgbe_enable_rx_csum, + .disable_rx_csum = sxgbe_disable_rx_csum, }; const struct sxgbe_core_ops *sxgbe_get_core_ops(void) diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_desc.h b/drivers/net/ethernet/samsung/sxgbe/sxgbe_desc.h index 547edf3..3c0b5a8 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_desc.h +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_desc.h @@ -113,7 +113,7 @@ struct sxgbe_rx_norm_desc { /* WB RDES3 */ u32 pkt_len:14; u32 rdes3_reserved:1; - u32 err_summary:15; + u32 err_summary:1; u32 err_l2_type:4; u32 layer34_pkt_type:4; u32 no_coagulation_pkt:1; @@ -273,8 +273,8 @@ struct sxgbe_desc_ops { int (*get_rx_ld_status)(struct sxgbe_rx_norm_desc *p); /* Return the reception status looking at the RDES1 */ - void (*rx_wbstatus)(struct sxgbe_rx_norm_desc *p, - struct sxgbe_extra_stats *x); + int (*rx_wbstatus)(struct sxgbe_rx_norm_desc *p, + struct sxgbe_extra_stats *x, int *checksum); /* Get own bit */ int (*get_rx_ctxt_owner)(struct sxgbe_rx_ctxt_desc *p); diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c index d105b2c..b845322 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c @@ -1255,6 +1255,7 @@ void sxgbe_tso_prepare(struct sxgbe_priv_data *priv, static netdev_tx_t sxgbe_xmit(struct sk_buff *skb, struct net_device *dev) { unsigned int entry, frag_num; + int cksum_flag = 0; struct netdev_queue *dev_txq; unsigned txq_index = skb_get_queue_mapping(skb); struct sxgbe_priv_data *priv = netdev_priv(dev); @@ -1335,7 +1336,7 @@ static netdev_tx_t sxgbe_xmit(struct sk_buff *skb, struct net_device *dev) __func__); priv->hw->desc->prepare_tx_desc(tx_desc, 1, no_pagedlen, - no_pagedlen); + no_pagedlen, cksum_flag); } } @@ -1353,7 +1354,7 @@ static netdev_tx_t sxgbe_xmit(struct sk_buff *skb, struct net_device *dev) /* prepare the descriptor */ priv->hw->desc->prepare_tx_desc(tx_desc, 0, len, - len); + len, cksum_flag); /* memory barrier to flush descriptor */ wmb(); @@ -1474,6 +1475,8 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit) unsigned int entry = priv->rxq[qnum]->cur_rx; unsigned int next_entry = 0; unsigned int count = 0; + int checksum; + int status; while (count < limit) { struct sxgbe_rx_norm_desc *p; @@ -1490,7 +1493,18 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit) next_entry = (++priv->rxq[qnum]->cur_rx) % rxsize; prefetch(priv->rxq[qnum]->dma_rx + next_entry); - /*TO DO read the status of the incoming frame */ + /* Read the status of the incoming frame and also get checksum + * value based on whether it is enabled in SXGBE hardware or + * not. + */ + status = priv->hw->desc->rx_wbstatus(p, &priv->xstats, + &checksum); + if (unlikely(status < 0)) { + entry = next_entry; + continue; + } + if (unlikely(!priv->rxcsum_insertion)) + checksum = CHECKSUM_NONE; skb = priv->rxq[qnum]->rx_skbuff[entry]; @@ -1504,7 +1518,11 @@ static int sxgbe_rx(struct sxgbe_priv_data *priv, int limit) skb_put(skb, frame_len); - netif_receive_skb(skb); + skb->ip_summed = checksum; + if (checksum == CHECKSUM_NONE) + netif_receive_skb(skb); + else + napi_gro_receive(&priv->napi, skb); entry = next_entry; } @@ -1750,15 +1768,15 @@ static int sxgbe_set_features(struct net_device *dev, { struct sxgbe_priv_data *priv = netdev_priv(dev); netdev_features_t changed = dev->features ^ features; - u32 ctrl; if (changed & NETIF_F_RXCSUM) { - ctrl = readl(priv->ioaddr + SXGBE_CORE_RX_CONFIG_REG); - if (features & NETIF_F_RXCSUM) - ctrl |= SXGBE_RX_CSUMOFFLOAD_ENABLE; - else - ctrl &= ~SXGBE_RX_CSUMOFFLOAD_ENABLE; - writel(ctrl, priv->ioaddr + SXGBE_CORE_RX_CONFIG_REG); + if (features & NETIF_F_RXCSUM) { + priv->hw->mac->enable_rx_csum(priv->ioaddr); + priv->rxcsum_insertion = true; + } else { + priv->hw->mac->disable_rx_csum(priv->ioaddr); + priv->rxcsum_insertion = false; + } } return 0; @@ -2121,6 +2139,12 @@ struct sxgbe_priv_data *sxgbe_dvr_probe(struct device *device, } } + /* Enable Rx checksum offload */ + if (priv->hw_cap.rx_csum_offload) { + priv->hw->mac->enable_rx_csum(priv->ioaddr); + priv->rxcsum_insertion = true; + } + /* Rx Watchdog is available, enable depend on platform data */ if (!priv->plat->riwt_off) { priv->use_riwt = 1;