From patchwork Sun Feb 7 08:19:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Chulski X-Patchwork-Id: 378347 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 82336C433E9 for ; Sun, 7 Feb 2021 08:26:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2A54B60234 for ; Sun, 7 Feb 2021 08:26:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229742AbhBGI0E (ORCPT ); Sun, 7 Feb 2021 03:26:04 -0500 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:36326 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229846AbhBGIWw (ORCPT ); Sun, 7 Feb 2021 03:22:52 -0500 Received: from pps.filterd (m0045851.ppops.net [127.0.0.1]) by mx0b-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 1178LSeD025722; Sun, 7 Feb 2021 00:22:01 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=pfpt0220; bh=Z/zUncY028ZMbqVWZPPn8XjfHgebj1nbRWeQGsz2pGs=; b=G893YXS4FJT0IAEWWXkbDs+m4OWkbMQzB0gXSY88vearjkoS/S6OBHZBNK1ldzCErOKh A2b5mcCNA9Jyu6GEtc22fgbGJcQsg/AdAjaB3akVt3kZ1mKKCkwaV1DVpQXyN2Y52n1B jCqCyt9b0j7DO+AZuWLV4JkgrLpv+0qaZpazWGGflZ7WlZvkd0MdqMNPP8gHCpEEfzeQ Ho3GfSRW80Sk07Uwnjn0XCCn5DsNBtk74Bdpl6K+FjE1rocFHkY1t/SNqv5Ex7n4enaY g8i9cUu8MNy4WlPJqsMhlJaVeCpZTdXWtApr46Qz+LjnpIktTbi6Z2Srsvo69WPiBGO7 QQ== Received: from dc5-exch02.marvell.com ([199.233.59.182]) by mx0b-0016f401.pphosted.com with ESMTP id 36hugq1m2p-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Sun, 07 Feb 2021 00:22:01 -0800 Received: from SC-EXCH01.marvell.com (10.93.176.81) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 7 Feb 2021 00:21:59 -0800 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by SC-EXCH01.marvell.com (10.93.176.81) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 7 Feb 2021 00:21:58 -0800 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Sun, 7 Feb 2021 00:21:58 -0800 Received: from stefan-pc.marvell.com (stefan-pc.marvell.com [10.5.25.21]) by maili.marvell.com (Postfix) with ESMTP id 808F43F703F; Sun, 7 Feb 2021 00:21:54 -0800 (PST) From: To: CC: , , , , , , , , , , , , , , , , Subject: [RESEND PATCH v8 net-next 11/15] net: mvpp2: add ethtool flow control configuration support Date: Sun, 7 Feb 2021 10:19:20 +0200 Message-ID: <1612685964-21890-12-git-send-email-stefanc@marvell.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1612685964-21890-1-git-send-email-stefanc@marvell.com> References: <1612685964-21890-1-git-send-email-stefanc@marvell.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.737 definitions=2021-02-07_03:2021-02-05,2021-02-07 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Stefan Chulski This patch add ethtool flow control configuration support. Tx flow control retrieved correctly by ethtool get function. FW per port ethtool configuration capability added. Patch also takes care about mtu change procedure, if PPv2 switch BM pools during mtu change. Signed-off-by: Stefan Chulski --- drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 13 +++ drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 98 ++++++++++++++++++++ 2 files changed, 111 insertions(+) diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h index 0f27be0..9071ab6 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h @@ -775,6 +775,19 @@ #define MSS_RXQ_TRESH_REG(q, fq) (MSS_RXQ_TRESH_BASE + (((q) + (fq)) \ * MSS_RXQ_TRESH_OFFS)) +#define MSS_BUF_POOL_BASE 0x40 +#define MSS_BUF_POOL_OFFS 4 +#define MSS_BUF_POOL_REG(id) (MSS_BUF_POOL_BASE \ + + (id) * MSS_BUF_POOL_OFFS) + +#define MSS_BUF_POOL_STOP_MASK 0xFFF +#define MSS_BUF_POOL_START_MASK (0xFFF << MSS_BUF_POOL_START_OFFS) +#define MSS_BUF_POOL_START_OFFS 12 +#define MSS_BUF_POOL_PORTS_MASK (0xF << MSS_BUF_POOL_PORTS_OFFS) +#define MSS_BUF_POOL_PORTS_OFFS 24 +#define MSS_BUF_POOL_PORT_OFFS(id) (0x1 << \ + ((id) + MSS_BUF_POOL_PORTS_OFFS)) + #define MSS_RXQ_TRESH_START_MASK 0xFFFF #define MSS_RXQ_TRESH_STOP_MASK (0xFFFF << MSS_RXQ_TRESH_STOP_OFFS) #define MSS_RXQ_TRESH_STOP_OFFS 16 diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index 29ba62a..5d80c5e 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -846,6 +846,59 @@ static void mvpp2_rxq_disable_fc(struct mvpp2_port *port) spin_unlock_irqrestore(&port->priv->mss_spinlock, flags); } +/* Routine disable/enable flow control for BM pool condition */ +static void mvpp2_bm_pool_update_fc(struct mvpp2_port *port, + struct mvpp2_bm_pool *pool, + bool en) +{ + int val, cm3_state; + unsigned long flags; + + spin_lock_irqsave(&port->priv->mss_spinlock, flags); + + /* Remove Flow control enable bit to prevent race between FW and Kernel + * If Flow control were enabled, it would be re-enabled. + */ + val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); + cm3_state = (val & FLOW_CONTROL_ENABLE_BIT); + val &= ~FLOW_CONTROL_ENABLE_BIT; + mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); + + /* Check if BM pool should be enabled/disable */ + if (en) { + /* Set BM pool start and stop thresholds per port */ + val = mvpp2_cm3_read(port->priv, MSS_BUF_POOL_REG(pool->id)); + val |= MSS_BUF_POOL_PORT_OFFS(port->id); + val &= ~MSS_BUF_POOL_START_MASK; + val |= (MSS_THRESHOLD_START << MSS_BUF_POOL_START_OFFS); + val &= ~MSS_BUF_POOL_STOP_MASK; + val |= MSS_THRESHOLD_STOP; + mvpp2_cm3_write(port->priv, MSS_BUF_POOL_REG(pool->id), val); + } else { + /* Remove BM pool from the port */ + val = mvpp2_cm3_read(port->priv, MSS_BUF_POOL_REG(pool->id)); + val &= ~MSS_BUF_POOL_PORT_OFFS(port->id); + + /* Zero BM pool start and stop thresholds to disable pool + * flow control if pool empty (not used by any port) + */ + if (!pool->buf_num) { + val &= ~MSS_BUF_POOL_START_MASK; + val &= ~MSS_BUF_POOL_STOP_MASK; + } + + mvpp2_cm3_write(port->priv, MSS_BUF_POOL_REG(pool->id), val); + } + + /* Notify Firmware that Flow control config space ready for update */ + val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG); + val |= FLOW_CONTROL_UPDATE_COMMAND_BIT; + val |= cm3_state; + mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val); + + spin_unlock_irqrestore(&port->priv->mss_spinlock, flags); +} + /* Release buffer to BM */ static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool, dma_addr_t buf_dma_addr, @@ -1176,6 +1229,16 @@ static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu) new_long_pool = MVPP2_BM_LONG; if (new_long_pool != port->pool_long->id) { + if (port->tx_fc) { + if (pkt_size > MVPP2_BM_LONG_PKT_SIZE) + mvpp2_bm_pool_update_fc(port, + port->pool_short, + false); + else + mvpp2_bm_pool_update_fc(port, port->pool_long, + false); + } + /* Remove port from old short & long pool */ port->pool_long = mvpp2_bm_pool_use(port, port->pool_long->id, port->pool_long->pkt_size); @@ -1193,6 +1256,25 @@ static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu) mvpp2_swf_bm_pool_init(port); mvpp2_set_hw_csum(port, new_long_pool); + + if (port->tx_fc) { + if (pkt_size > MVPP2_BM_LONG_PKT_SIZE) + mvpp2_bm_pool_update_fc(port, port->pool_long, + true); + else + mvpp2_bm_pool_update_fc(port, port->pool_short, + true); + } + + /* Update L4 checksum when jumbo enable/disable on port */ + if (new_long_pool == MVPP2_BM_JUMBO && port->id != 0) { + dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM); + dev->hw_features &= ~(NETIF_F_IP_CSUM | + NETIF_F_IPV6_CSUM); + } else { + dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + } } out_set: @@ -6358,6 +6440,7 @@ static void mvpp2_mac_link_up(struct phylink_config *config, { struct mvpp2_port *port = mvpp2_phylink_to_port(config); u32 val; + int i; if (mvpp2_is_xlg(interface)) { if (!phylink_autoneg_inband(mode)) { @@ -6408,6 +6491,21 @@ static void mvpp2_mac_link_up(struct phylink_config *config, val); } + if (port->priv->global_tx_fc) { + port->tx_fc = tx_pause; + if (tx_pause) + mvpp2_rxq_enable_fc(port); + else + mvpp2_rxq_disable_fc(port); + if (port->priv->percpu_pools) { + for (i = 0; i < port->nrxqs; i++) + mvpp2_bm_pool_update_fc(port, &port->priv->bm_pools[i], tx_pause); + } else { + mvpp2_bm_pool_update_fc(port, port->pool_long, tx_pause); + mvpp2_bm_pool_update_fc(port, port->pool_short, tx_pause); + } + } + mvpp2_port_enable(port); mvpp2_egress_enable(port);