From patchwork Sun Jan 31 09:50:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Chulski X-Patchwork-Id: 12057613 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 CE2C5C433DB for ; Sun, 31 Jan 2021 10:38:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9D9C960234 for ; Sun, 31 Jan 2021 10:38:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229706AbhAaKhq (ORCPT ); Sun, 31 Jan 2021 05:37:46 -0500 Received: from mx0a-0016f401.pphosted.com ([67.231.148.174]:57770 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S230316AbhAaJzn (ORCPT ); Sun, 31 Jan 2021 04:55:43 -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 10V9bRbg020297; Sun, 31 Jan 2021 01:51:46 -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=6pDdBO4FiW4J3ZSh6Q2cfqQ4yvjsrELQlYlAuzrXKH0=; b=Yl7hssTEmZHLSL+cEVcWzFpbFqPnXrG30x0KyOfnpEb8u51ECjNWjv6BeoBfEKoYfT67 HYldGlNJxzjTSh/M6Ivpd7PsPHfZJy5mEqL/GoU+RzS/cvkJNKTtUNxk9r5n7SSWijxw ++Xn6GBMAUHSjj/TN9u1nusXQHNFjtIyH4YFHltedQkPVr9cLi1ybQqdCTS976Q3Yx0V 4DQbYTks5djm0ri6PSyiCC5AukE5vYIPDg2u3jsLXiQHQOpWxeGQUTEG4k0578pczMp1 SqXPKgCJAB8AfC8+fycATHdjpKHKwJcWhnWCfD+7IOjd4LjkByNi17J8cVTB2ZbWQ1wb DQ== Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0a-0016f401.pphosted.com with ESMTP id 36d5psshjp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Sun, 31 Jan 2021 01:51:46 -0800 Received: from DC5-EXCH02.marvell.com (10.69.176.39) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 31 Jan 2021 01:51:45 -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 01:51:45 -0800 Received: from stefan-pc.marvell.com (stefan-pc.marvell.com [10.5.25.21]) by maili.marvell.com (Postfix) with ESMTP id 2989E3F703F; Sun, 31 Jan 2021 01:51:41 -0800 (PST) From: To: CC: , , , , , , , , , , , Subject: [PATCH v6 net-next 09/18] net: mvpp2: add FCA periodic timer configurations Date: Sun, 31 Jan 2021 11:50:55 +0200 Message-ID: <1612086664-23972-10-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 Flow Control periodic timer would be used if port in XOFF to transmit periodic XOFF frames. Signed-off-by: Stefan Chulski --- drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 13 +++++- drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 45 ++++++++++++++++++++ 2 files changed, 57 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h index cac9885..73f087c 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h @@ -596,6 +596,15 @@ #define MVPP22_MPCS_CLK_RESET_DIV_RATIO(n) ((n) << 4) #define MVPP22_MPCS_CLK_RESET_DIV_SET BIT(11) +/* FCA registers. PPv2.2 and PPv2.3 */ +#define MVPP22_FCA_BASE(port) (0x7600 + (port) * 0x1000) +#define MVPP22_FCA_REG_SIZE 16 +#define MVPP22_FCA_REG_MASK 0xFFFF +#define MVPP22_FCA_CONTROL_REG 0x0 +#define MVPP22_FCA_ENABLE_PERIODIC BIT(11) +#define MVPP22_PERIODIC_COUNTER_LSB_REG (0x110) +#define MVPP22_PERIODIC_COUNTER_MSB_REG (0x114) + /* XPCS registers. PPv2.2 and PPv2.3 */ #define MVPP22_XPCS_BASE(port) (0x7400 + (port) * 0x1000) #define MVPP22_XPCS_CFG0 0x0 @@ -752,7 +761,9 @@ ((kb) * 1024 - MVPP2_TX_FIFO_THRESHOLD_MIN) /* MSS Flow control */ -#define MSS_SRAM_SIZE 0x800 +#define MSS_SRAM_SIZE 0x800 +#define FC_QUANTA 0xFFFF +#define FC_CLK_DIVIDER 100 /* RX buffer constants */ #define MVPP2_SKB_SHINFO_SIZE \ diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index d80947a..6e59d07 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -1281,6 +1281,49 @@ static void mvpp22_gop_init_10gkr(struct mvpp2_port *port) writel(val, mpcs + MVPP22_MPCS_CLK_RESET); } +static void mvpp22_gop_fca_enable_periodic(struct mvpp2_port *port, bool en) +{ + struct mvpp2 *priv = port->priv; + void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id); + u32 val; + + val = readl(fca + MVPP22_FCA_CONTROL_REG); + val &= ~MVPP22_FCA_ENABLE_PERIODIC; + if (en) + val |= MVPP22_FCA_ENABLE_PERIODIC; + writel(val, fca + MVPP22_FCA_CONTROL_REG); +} + +static void mvpp22_gop_fca_set_timer(struct mvpp2_port *port, u32 timer) +{ + struct mvpp2 *priv = port->priv; + void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id); + u32 lsb, msb; + + lsb = timer & MVPP22_FCA_REG_MASK; + msb = timer >> MVPP22_FCA_REG_SIZE; + + writel(lsb, fca + MVPP22_PERIODIC_COUNTER_LSB_REG); + writel(msb, fca + MVPP22_PERIODIC_COUNTER_MSB_REG); +} + +/* Set Flow Control timer x100 faster than pause quanta to ensure that link + * partner won't send traffic if port is in XOFF mode. + */ +static void mvpp22_gop_fca_set_periodic_timer(struct mvpp2_port *port) +{ + u32 timer; + + timer = (port->priv->tclk / (USEC_PER_SEC * FC_CLK_DIVIDER)) + * FC_QUANTA; + + mvpp22_gop_fca_enable_periodic(port, false); + + mvpp22_gop_fca_set_timer(port, timer); + + mvpp22_gop_fca_enable_periodic(port, true); +} + static int mvpp22_gop_init(struct mvpp2_port *port) { struct mvpp2 *priv = port->priv; @@ -1325,6 +1368,8 @@ static int mvpp22_gop_init(struct mvpp2_port *port) val |= GENCONF_SOFT_RESET1_GOP; regmap_write(priv->sysctrl_base, GENCONF_SOFT_RESET1, val); + mvpp22_gop_fca_set_periodic_timer(port); + unsupported_conf: return 0;