From patchwork Mon Sep 15 17:12:55 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Li X-Patchwork-Id: 4907281 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0FFFDBEEA5 for ; Mon, 15 Sep 2014 18:20:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 349CE2014A for ; Mon, 15 Sep 2014 18:20:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6E3BD20149 for ; Mon, 15 Sep 2014 18:20:15 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XTaqL-0008K7-1X; Mon, 15 Sep 2014 18:17:41 +0000 Received: from mail-bn1bon0139.outbound.protection.outlook.com ([157.56.111.139] helo=na01-bn1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XTaq7-0008BU-Oc for linux-arm-kernel@lists.infradead.org; Mon, 15 Sep 2014 18:17:31 +0000 Received: from BN3PR0301CA0013.namprd03.prod.outlook.com (25.160.180.151) by BY2PR03MB379.namprd03.prod.outlook.com (10.242.237.21) with Microsoft SMTP Server (TLS) id 15.0.1019.16; Mon, 15 Sep 2014 18:17:03 +0000 Received: from BY2FFO11FD054.protection.gbl (2a01:111:f400:7c0c::199) by BN3PR0301CA0013.outlook.office365.com (2a01:111:e400:4000::23) with Microsoft SMTP Server (TLS) id 15.0.1029.13 via Frontend Transport; Mon, 15 Sep 2014 18:17:03 +0000 Received: from tx30smr01.am.freescale.net (192.88.168.50) by BY2FFO11FD054.mail.protection.outlook.com (10.1.15.191) with Microsoft SMTP Server (TLS) id 15.0.1019.14 via Frontend Transport; Mon, 15 Sep 2014 18:17:02 +0000 Received: from shlinux2.ap.freescale.net (shlinux2.ap.freescale.net [10.192.224.44]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id s8FIGosE024075; Mon, 15 Sep 2014 11:16:58 -0700 From: To: , , , Subject: [Patch net-next 2/4] net: fec: add interrupt coalescence feature support Date: Tue, 16 Sep 2014 01:12:55 +0800 Message-ID: <1410801177-15872-3-git-send-email-Frank.Li@freescale.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1410801177-15872-1-git-send-email-Frank.Li@freescale.com> References: <1410801177-15872-1-git-send-email-Frank.Li@freescale.com> X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.168.50; CTRY:US; IPV:CAL; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(10019020)(6009001)(199003)(189002)(92726001)(76176999)(64706001)(86152002)(80022001)(19580395003)(26826002)(21056001)(4396001)(74502001)(83072002)(36756003)(77156001)(104166001)(81342001)(44976005)(105606002)(62966002)(81542001)(50226001)(79102001)(90102001)(95666004)(85852003)(50986999)(86362001)(83322001)(97736003)(107046002)(19580405001)(84676001)(229853001)(20776003)(77982001)(68736004)(92566001)(46102001)(87286001)(74662001)(2201001)(93916002)(87936001)(89996001)(47776003)(31966008)(85306004)(48376002)(104016003)(50466002)(6806004)(76482001)(99396002)(102836001)(106466001)(88136002); DIR:OUT; SFP:1102; SCL:1; SRVR:BY2PR03MB379; H:tx30smr01.am.freescale.net; FPR:; MLV:ovrnspm; PTR:InfoDomainNonexistent; A:1; MX:1; LANG:en; MIME-Version: 1.0 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;UriScan:; X-Forefront-PRVS: 03355EE97E Received-SPF: Fail (protection.outlook.com: domain of freescale.com does not designate 192.88.168.50 as permitted sender) receiver=protection.outlook.com; client-ip=192.88.168.50; helo=tx30smr01.am.freescale.net; Authentication-Results: spf=fail (sender IP is 192.88.168.50) smtp.mailfrom=Frank.Li@freescale.com; X-OriginatorOrg: freescale.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140915_111728_064292_DEAD619A X-CRM114-Status: GOOD ( 11.78 ) X-Spam-Score: -0.2 (/) Cc: Frank Li , shawn.guo@linaro.org, Fugang Duan , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, 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: Fugang Duan i.MX6 SX support interrupt coalescence feature By default, init the interrupt coalescing frame count threshold and timer threshold. Supply the ethtool interfaces as below for user tuning to improve enet performance: rx_max_coalesced_frames rx_coalesce_usecs tx_max_coalesced_frames tx_coalesce_usecs Signed-off-by: Fugang Duan Signed-off-by: Frank Li --- drivers/net/ethernet/freescale/fec.h | 14 ++++ drivers/net/ethernet/freescale/fec_main.c | 111 ++++++++++++++++++++++++++++++ 2 files changed, 125 insertions(+) diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h index b7c7722..f13e319 100644 --- a/drivers/net/ethernet/freescale/fec.h +++ b/drivers/net/ethernet/freescale/fec.h @@ -335,6 +335,14 @@ struct bufdesc_ex { #define FEC_DEFAULT_IMASK (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII | FEC_ENET_TS_TIMER) #define FEC_RX_DISABLED_IMASK (FEC_DEFAULT_IMASK & (~FEC_ENET_RXF)) +/* ENET interrupt coalescing macro define */ +#define FEC_ITR_CLK_SEL (0x1 << 30) +#define FEC_ITR_EN (0x1 << 31) +#define FEC_ITR_ICFT(X) ((X & 0xFF) << 20) +#define FEC_ITR_ICTT(X) ((X) & 0xFFFF) +#define FEC_ITR_ICFT_DEFAULT 200 /* Set 200 frame count threshold */ +#define FEC_ITR_ICTT_DEFAULT 1000 /* Set 1000us timer threshold */ + #define FEC_VLAN_TAG_LEN 0x04 #define FEC_ETHTYPE_LEN 0x02 @@ -446,6 +454,12 @@ struct fec_enet_private { unsigned int tx_align; unsigned int rx_align; + + /* hw interrupt coalesce */ + uint rx_pkts_itr; + uint rx_time_itr; + uint tx_pkts_itr; + uint tx_time_itr; }; void fec_ptp_init(struct platform_device *pdev); diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index f958e91..524ddbe 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -63,6 +63,7 @@ #include "fec.h" static void set_multicast_list(struct net_device *ndev); +static void fec_enet_itr_coal_init(struct net_device *ndev); #define DRIVER_NAME "fec" @@ -1095,6 +1096,10 @@ fec_restart(struct net_device *ndev) /* Enable interrupts we wish to service */ writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); + + /* Init the interrupt coalescing */ + fec_enet_itr_coal_init(ndev); + } static void @@ -2234,12 +2239,118 @@ static int fec_enet_nway_reset(struct net_device *dev) return genphy_restart_aneg(phydev); } +/* + * ITR clock source is enet system clock (clk_ahb). + * TCTT unit is cycle_ns * 64 cycle + * So, the ICTT value = X us / (cycle_ns * 64) + */ +static int fec_enet_us_to_itr_clock(struct net_device *ndev, int us) +{ + struct fec_enet_private *fep = netdev_priv(ndev); + + return us * (clk_get_rate(fep->clk_ahb) / 64000) / 1000; +} + +/* Set threshold for interrupt coalescing */ +static void fec_enet_itr_coal_set(struct net_device *ndev) +{ + struct fec_enet_private *fep = netdev_priv(ndev); + const struct platform_device_id *id_entry = + platform_get_device_id(fep->pdev); + int rx_itr, tx_itr; + + if (!(id_entry->driver_data & FEC_QUIRK_HAS_AVB)) + return; + + /* Must be greater than zero to avoid unpredictable behavior */ + if (!fep->rx_time_itr || !fep->rx_pkts_itr || + !fep->tx_time_itr || !fep->tx_pkts_itr) + return; + /* + * Select enet system clock as Interrupt Coalescing + * timer Clock Source + */ + rx_itr = FEC_ITR_CLK_SEL; + tx_itr = FEC_ITR_CLK_SEL; + + /* set ICFT and ICTT */ + rx_itr |= FEC_ITR_ICFT(fep->rx_pkts_itr); + rx_itr |= FEC_ITR_ICTT(fec_enet_us_to_itr_clock(ndev, fep->rx_time_itr)); + tx_itr |= FEC_ITR_ICFT(fep->tx_pkts_itr); + tx_itr |= FEC_ITR_ICTT(fec_enet_us_to_itr_clock(ndev, fep->tx_time_itr)); + + rx_itr |= FEC_ITR_EN; + tx_itr |= FEC_ITR_EN; + + writel(tx_itr, fep->hwp + FEC_TXIC0); + writel(rx_itr, fep->hwp + FEC_RXIC0); + writel(tx_itr, fep->hwp + FEC_TXIC1); + writel(rx_itr, fep->hwp + FEC_RXIC1); + writel(tx_itr, fep->hwp + FEC_TXIC2); + writel(rx_itr, fep->hwp + FEC_RXIC2); +} + +static int fec_enet_get_coalesce(struct net_device *ndev, + struct ethtool_coalesce *ec) +{ + struct fec_enet_private *fep = netdev_priv(ndev); + const struct platform_device_id *id_entry = + platform_get_device_id(fep->pdev); + + if (!(id_entry->driver_data & FEC_QUIRK_HAS_AVB)) + return -EOPNOTSUPP; + + ec->rx_coalesce_usecs = fep->rx_time_itr; + ec->rx_max_coalesced_frames = fep->rx_pkts_itr; + + ec->tx_coalesce_usecs = fep->tx_time_itr; + ec->tx_max_coalesced_frames = fep->tx_pkts_itr; + + return 0; +} + +static int fec_enet_set_coalesce(struct net_device *ndev, + struct ethtool_coalesce *ec) +{ + struct fec_enet_private *fep = netdev_priv(ndev); + const struct platform_device_id *id_entry = + platform_get_device_id(fep->pdev); + + if (!(id_entry->driver_data & FEC_QUIRK_HAS_AVB)) + return -EOPNOTSUPP; + + fep->rx_time_itr = ec->rx_coalesce_usecs; + fep->rx_pkts_itr = ec->rx_max_coalesced_frames; + + fep->tx_time_itr = ec->tx_coalesce_usecs; + fep->tx_pkts_itr = ec->tx_max_coalesced_frames; + + fec_enet_itr_coal_set(ndev); + + return 0; +} + +static void fec_enet_itr_coal_init(struct net_device *ndev) +{ + struct ethtool_coalesce ec; + + ec.rx_coalesce_usecs = FEC_ITR_ICTT_DEFAULT; + ec.rx_max_coalesced_frames = FEC_ITR_ICFT_DEFAULT; + + ec.tx_coalesce_usecs = FEC_ITR_ICTT_DEFAULT; + ec.tx_max_coalesced_frames = FEC_ITR_ICFT_DEFAULT; + + fec_enet_set_coalesce(ndev, &ec); +} + static const struct ethtool_ops fec_enet_ethtool_ops = { .get_settings = fec_enet_get_settings, .set_settings = fec_enet_set_settings, .get_drvinfo = fec_enet_get_drvinfo, .nway_reset = fec_enet_nway_reset, .get_link = ethtool_op_get_link, + .get_coalesce = fec_enet_get_coalesce, + .set_coalesce = fec_enet_set_coalesce, #ifndef CONFIG_M5272 .get_pauseparam = fec_enet_get_pauseparam, .set_pauseparam = fec_enet_set_pauseparam,