From patchwork Sun Jan 31 09:51:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Chulski X-Patchwork-Id: 12057637 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 B80EBC433DB for ; Sun, 31 Jan 2021 11:08:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7B82664E26 for ; Sun, 31 Jan 2021 11:08:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231378AbhAaLHX (ORCPT ); Sun, 31 Jan 2021 06:07:23 -0500 Received: from mx0a-0016f401.pphosted.com ([67.231.148.174]:41486 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S230432AbhAaKBn (ORCPT ); Sun, 31 Jan 2021 05:01:43 -0500 Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 10V9bRbh020297; Sun, 31 Jan 2021 01:52:07 -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=iUIBeD+BhObIJdIltYd8fBbVWNmmS1YgZDHdfGObhcE=; b=M7QltgOYqxxGvDZTtPDzRWFM5C31qkvbUxTk0oKNqFJsJCUmX0h/Af93bpNr0s0ObSLH gTkyMnfnY1bGav7uQwl8PTVUv4K7JnyPsg2L0RXMGDKbJpBroWWbskDBUbmc2UeKuqt8 ANWYTGTjy6ropIXWs/4AoORLTiLAy4cdN0vVnPwjWc4+H23ysUWPuKigSaModDRa8Huw iHVgheouf6mUpkrLZ3YBv1Qd9Rvfb6t3aNJqBQf55dREo2XznVIibFioQqb/jGCWjkuk H0/Gc6qxqQTgGhsR6hi9JeqBgu4WLJCXiMXmnrVg5b5gDNnzZA/9BkPdbb+61DcpydXa 7Q== Received: from dc5-exch02.marvell.com ([199.233.59.182]) by mx0a-0016f401.pphosted.com with ESMTP id 36d5psshk3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Sun, 31 Jan 2021 01:52:07 -0800 Received: from SC-EXCH03.marvell.com (10.93.176.83) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 31 Jan 2021 01:52:06 -0800 Received: from DC5-EXCH02.marvell.com (10.69.176.39) by SC-EXCH03.marvell.com (10.93.176.83) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 31 Jan 2021 01:52:05 -0800 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Sun, 31 Jan 2021 01:52:05 -0800 Received: from stefan-pc.marvell.com (stefan-pc.marvell.com [10.5.25.21]) by maili.marvell.com (Postfix) with ESMTP id 6208B3F7040; Sun, 31 Jan 2021 01:52:02 -0800 (PST) From: To: CC: , , , , , , , , , , , Subject: [PATCH v6 net-next 15/18] net: mvpp2: add PPv23 RX FIFO flow control Date: Sun, 31 Jan 2021 11:51:01 +0200 Message-ID: <1612086664-23972-16-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 New FIFO flow control feature were added in PPv23. PPv2 FIFO polled by HW and trigger pause frame if FIFO fill level is below threshold. FIFO HW flow control enabled with CM3 RXQ&BM flow control with ethtool. Current FIFO thresholds is: 9KB for port with maximum speed 10Gb/s port 4KB for port with maximum speed 5Gb/s port 2KB for port with maximum speed 1Gb/s port Signed-off-by: Stefan Chulski --- drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 15 ++++++ drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 53 ++++++++++++++++++++ 2 files changed, 68 insertions(+) diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h index 1967493..9947385 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h @@ -770,6 +770,18 @@ #define MVPP2_TX_FIFO_THRESHOLD(kb) \ ((kb) * 1024 - MVPP2_TX_FIFO_THRESHOLD_MIN) +/* RX FIFO threshold in 1KB granularity */ +#define MVPP23_PORT0_FIFO_TRSH (9 * 1024) +#define MVPP23_PORT1_FIFO_TRSH (4 * 1024) +#define MVPP23_PORT2_FIFO_TRSH (2 * 1024) + +/* RX Flow Control Registers */ +#define MVPP2_RX_FC_REG(port) (0x150 + 4 * (port)) +#define MVPP2_RX_FC_EN BIT(24) +#define MVPP2_RX_FC_TRSH_OFFS 16 +#define MVPP2_RX_FC_TRSH_MASK (0xFF << MVPP2_RX_FC_TRSH_OFFS) +#define MVPP2_RX_FC_TRSH_UNIT 256 + /* MSS Flow control */ #define MSS_SRAM_SIZE 0x800 #define MSS_FC_COM_REG 0 @@ -1502,6 +1514,8 @@ struct mvpp2_bm_pool { void mvpp2_dbgfs_cleanup(struct mvpp2 *priv); +void mvpp23_rx_fifo_fc_en(struct mvpp2 *priv, int port, bool en); + #ifdef CONFIG_MVPP2_PTP int mvpp22_tai_probe(struct device *dev, struct mvpp2 *priv); void mvpp22_tai_tstamp(struct mvpp2_tai *tai, u32 tstamp, @@ -1534,4 +1548,5 @@ static inline bool mvpp22_rx_hwtstamping(struct mvpp2_port *port) { return IS_ENABLED(CONFIG_MVPP2_PTP) && port->rx_hwtstamp; } + #endif diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index c7517b1f..afa61cc 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -6535,6 +6535,8 @@ static void mvpp2_mac_link_up(struct phylink_config *config, mvpp2_bm_pool_update_fc(port, port->pool_long, tx_pause); mvpp2_bm_pool_update_fc(port, port->pool_short, tx_pause); } + if (port->priv->hw_version == MVPP23) + mvpp23_rx_fifo_fc_en(port->priv, port->id, tx_pause); } mvpp2_port_enable(port); @@ -7003,6 +7005,55 @@ static void mvpp22_rx_fifo_init(struct mvpp2 *priv) mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1); } +/* Configure Rx FIFO Flow control thresholds */ +static void mvpp23_rx_fifo_fc_set_tresh(struct mvpp2 *priv) +{ + int port, val; + + /* Port 0: maximum speed -10Gb/s port + * required by spec RX FIFO threshold 9KB + * Port 1: maximum speed -5Gb/s port + * required by spec RX FIFO threshold 4KB + * Port 2: maximum speed -1Gb/s port + * required by spec RX FIFO threshold 2KB + */ + + /* Without loopback port */ + for (port = 0; port < (MVPP2_MAX_PORTS - 1); port++) { + if (port == 0) { + val = (MVPP23_PORT0_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT) + << MVPP2_RX_FC_TRSH_OFFS; + val &= MVPP2_RX_FC_TRSH_MASK; + mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); + } else if (port == 1) { + val = (MVPP23_PORT1_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT) + << MVPP2_RX_FC_TRSH_OFFS; + val &= MVPP2_RX_FC_TRSH_MASK; + mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); + } else { + val = (MVPP23_PORT2_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT) + << MVPP2_RX_FC_TRSH_OFFS; + val &= MVPP2_RX_FC_TRSH_MASK; + mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); + } + } +} + +/* Configure Rx FIFO Flow control thresholds */ +void mvpp23_rx_fifo_fc_en(struct mvpp2 *priv, int port, bool en) +{ + int val; + + val = mvpp2_read(priv, MVPP2_RX_FC_REG(port)); + + if (en) + val |= MVPP2_RX_FC_EN; + else + val &= ~MVPP2_RX_FC_EN; + + mvpp2_write(priv, MVPP2_RX_FC_REG(port), val); +} + static void mvpp22_tx_fifo_set_hw(struct mvpp2 *priv, int port, int size) { int threshold = MVPP2_TX_FIFO_THRESHOLD(size); @@ -7154,6 +7205,8 @@ static int mvpp2_init(struct platform_device *pdev, struct mvpp2 *priv) } else { mvpp22_rx_fifo_init(priv); mvpp22_tx_fifo_init(priv); + if (priv->hw_version == MVPP23) + mvpp23_rx_fifo_fc_set_tresh(priv); } if (priv->hw_version == MVPP21)