From patchwork Sun Jan 31 09:50:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Chulski X-Patchwork-Id: 12057629 X-Patchwork-Delegate: kuba@kernel.org 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=ham 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 49716C433E0 for ; Sun, 31 Jan 2021 11:06:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D0B964E26 for ; Sun, 31 Jan 2021 11:06:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231346AbhAaLD7 (ORCPT ); Sun, 31 Jan 2021 06:03:59 -0500 Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:61322 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230430AbhAaJ7W (ORCPT ); Sun, 31 Jan 2021 04:59:22 -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 10V9q0DN017170; Sun, 31 Jan 2021 01:52:00 -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=LSVMIbZvVt1LCDeW2swsDZnUVUGXgrrPWyMonl/do+Y=; b=cJlDxFVn/k2MFHeLz+L4UtssaxT5s4uLJEsyqmsDticZ+A7ZWJzQrrY39H1DYb0kOHRN 0GoWbWuX5y4VmW4nfvIh/9qr7of8HjAU0gzQ8/icODDSx6eZ9CjzOmb5461BJNEW8qpO ge16o6expHy55bAufmq8u0taS7anehAixBeSlfUZhYazsV0+UlP8GpLDFFgMX0vqq0kU 2k3YXXwmN9IOsvtoMMgrPHX6rMP5/ZD9iQFslV0OS7Sv+zbMXNk5AMaAtLCYwTUeBhDi Ji0UlO7WN/RUEsk2uyVrLSDIbk+3by5XC0wn47FySEpH7HuVPxlpGPwZgWJ0+Elg34BV Zg== Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0b-0016f401.pphosted.com with ESMTP id 36d7uq1bmf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Sun, 31 Jan 2021 01:52:00 -0800 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 31 Jan 2021 01:51:58 -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, 31 Jan 2021 01:51:58 -0800 Received: from stefan-pc.marvell.com (stefan-pc.marvell.com [10.5.25.21]) by maili.marvell.com (Postfix) with ESMTP id A0BA63F703F; Sun, 31 Jan 2021 01:51:55 -0800 (PST) From: To: CC: , , , , , , , , , , , Subject: [PATCH v6 net-next 13/18] net: mvpp2: add ethtool flow control configuration support Date: Sun, 31 Jan 2021 11:50:59 +0200 Message-ID: <1612086664-23972-14-git-send-email-stefanc@marvell.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1612086664-23972-1-git-send-email-stefanc@marvell.com> References: <1612086664-23972-1-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=2021-01-31_03:2021-01-29,2021-01-31 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@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 cb2d0c5..1d4d5a8 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: @@ -6356,6 +6438,7 @@ 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)) { @@ -6406,6 +6489,21 @@ 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);