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[2620:137:e000::1:20]) by mx.google.com with ESMTP id s15-20020a170906c30f00b007316843d58bsi7449101ejz.925.2022.11.21.07.52.28; Mon, 21 Nov 2022 07:52:52 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@microchip.com header.s=mchp header.b=hTcE4JK9; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=microchip.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231129AbiKUPnH (ORCPT + 99 others); Mon, 21 Nov 2022 10:43:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45004 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231755AbiKUPm7 (ORCPT ); Mon, 21 Nov 2022 10:42:59 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0ADEC9FD5; Mon, 21 Nov 2022 07:42:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1669045367; x=1700581367; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=2/mXNQ798YfB8i1GOwnDOGQ4szNhlzwfH3mTpOh1dRs=; b=hTcE4JK9iIdQt5i5NGowz7u8zH5n96EefDTM8iGKrQ0/N0u8IkvQuVNI h1UPO5L8+oyNLsikZ7wT9XSkDYrlS2NjYxqJVqdcbLpwgsOMwk2OY+kUT w/S4/idcbKiiLGkzBC5xVVsPULwoj5RE8p3FZn6VPhRBcSZOcW+KTyeeU nnw4XthlwX6DJipRbUigBtz0Q5xD68s5NyRmf/YABr3ZhaRLDXpof0waK zSt7JpXC3SThMES6y4zN3ARPciQfBnj55fQvlYigLMHSrdr4En2lpqBds j/cDtdPqqGV6HOhAOIi9f6RniDJc99WJ3LdYZYAFviDRhEtwFNH/4goTE Q==; X-IronPort-AV: E=Sophos;i="5.96,181,1665471600"; d="scan'208";a="184501140" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 21 Nov 2022 08:42:36 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Mon, 21 Nov 2022 08:42:34 -0700 Received: from CHE-LT-I17769U.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Mon, 21 Nov 2022 08:42:30 -0700 From: Arun Ramadoss To: , CC: , , , , , , , , , , , , Subject: [RFC Patch net-next v2 3/8] net: dsa: microchip: Initial hardware time stamping support Date: Mon, 21 Nov 2022 21:11:45 +0530 Message-ID: <20221121154150.9573-4-arun.ramadoss@microchip.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20221121154150.9573-1-arun.ramadoss@microchip.com> References: <20221121154150.9573-1-arun.ramadoss@microchip.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_PASS,T_SPF_TEMPERROR autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750121550089928854?= X-GMAIL-MSGID: =?utf-8?q?1750121550089928854?= This patch adds the routine for get_ts_info, hwstamp_get, set. This enables the PTP support towards userspace applications such as linuxptp. Tx timestamping can be enabled per port and Rx timestamping enabled globally. Signed-off-by: Christian Eggers Signed-off-by: Arun Ramadoss --- drivers/net/dsa/microchip/ksz_common.c | 2 + drivers/net/dsa/microchip/ksz_common.h | 3 + drivers/net/dsa/microchip/ksz_ptp.c | 115 ++++++++++++++++++++++++- drivers/net/dsa/microchip/ksz_ptp.h | 14 +++ include/linux/dsa/ksz_common.h | 23 +++++ net/dsa/tag_ksz.c | 63 ++++++++++++++ 6 files changed, 218 insertions(+), 2 deletions(-) create mode 100644 include/linux/dsa/ksz_common.h diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index eb77eca0dcb2..0abbb2ebcd00 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -2873,6 +2873,8 @@ static const struct dsa_switch_ops ksz_switch_ops = { .port_change_mtu = ksz_change_mtu, .port_max_mtu = ksz_max_mtu, .get_ts_info = ksz_get_ts_info, + .port_hwtstamp_get = ksz_hwtstamp_get, + .port_hwtstamp_set = ksz_hwtstamp_set, }; struct ksz_device *ksz_switch_alloc(struct device *base, void *priv) diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h index 767f17d2c75d..605d0a295288 100644 --- a/drivers/net/dsa/microchip/ksz_common.h +++ b/drivers/net/dsa/microchip/ksz_common.h @@ -104,6 +104,9 @@ struct ksz_port { struct ksz_device *ksz_dev; struct ksz_irq pirq; u8 num; +#if IS_ENABLED(CONFIG_NET_DSA_MICROCHIP_KSZ_PTP) + u8 hwts_tx_en; +#endif }; struct ksz_device { diff --git a/drivers/net/dsa/microchip/ksz_ptp.c b/drivers/net/dsa/microchip/ksz_ptp.c index cad0c6087419..1b2880d013ed 100644 --- a/drivers/net/dsa/microchip/ksz_ptp.c +++ b/drivers/net/dsa/microchip/ksz_ptp.c @@ -3,6 +3,7 @@ * Copyright (C) 2021-2022 Microchip Technology Inc. */ +#include #include #include #include @@ -21,6 +22,17 @@ #define KSZ_PTP_INC_NS 40 /* HW clock is incremented every 40 ns (by 40) */ #define KSZ_PTP_SUBNS_BITS 32 /* Number of bits in sub-nanoseconds counter */ +static int ksz_ptp_enable_mode(struct ksz_device *dev, bool enable) +{ + u16 data = 0; + + /* Enable PTP mode */ + if (enable) + data = PTP_ENABLE; + + return ksz_rmw16(dev, REG_PTP_MSG_CONF1, PTP_ENABLE, data); +} + /* The function is return back the capability of timestamping feature when * requested through ethtool -T utility */ @@ -33,15 +45,114 @@ int ksz_get_ts_info(struct dsa_switch *ds, int port, struct ethtool_ts_info *ts) SOF_TIMESTAMPING_RX_HARDWARE | SOF_TIMESTAMPING_RAW_HARDWARE; - ts->tx_types = (1 << HWTSTAMP_TX_OFF); + ts->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ONESTEP_P2P); + + if (is_lan937x(dev)) + ts->tx_types |= (1 << HWTSTAMP_TX_ON); - ts->rx_filters = (1 << HWTSTAMP_FILTER_NONE); + ts->rx_filters = + (1 << HWTSTAMP_FILTER_NONE) | (1 << HWTSTAMP_FILTER_ALL); ts->phc_index = ptp_clock_index(ptp_data->clock); return 0; } +int ksz_hwtstamp_get(struct dsa_switch *ds, int port, struct ifreq *ifr) +{ + struct ksz_tagger_data *tagger_data = ksz_tagger_data(ds); + struct ksz_device *dev = ds->priv; + struct hwtstamp_config config; + + config.flags = 0; + + config.tx_type = dev->ports[port].hwts_tx_en; + + if (tagger_data->hwtstamp_get_state(ds)) + config.rx_filter = HWTSTAMP_FILTER_ALL; + else + config.rx_filter = HWTSTAMP_FILTER_NONE; + + return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? + -EFAULT : 0; +} + +static int ksz_set_hwtstamp_config(struct ksz_device *dev, int port, + struct hwtstamp_config *config) +{ + struct ksz_tagger_data *tagger_data = ksz_tagger_data(dev->ds); + struct ksz_port *prt = &dev->ports[port]; + bool rx_on; + + /* reserved for future extensions */ + if (config->flags) + return -EINVAL; + + switch (config->tx_type) { + case HWTSTAMP_TX_OFF: + case HWTSTAMP_TX_ONESTEP_P2P: + prt->hwts_tx_en = config->tx_type; + break; + case HWTSTAMP_TX_ON: + if (!is_lan937x(dev)) + return -ERANGE; + + prt->hwts_tx_en = config->tx_type; + break; + default: + return -ERANGE; + } + + switch (config->rx_filter) { + case HWTSTAMP_FILTER_NONE: + rx_on = false; + break; + default: + rx_on = true; + break; + } + + if (rx_on != tagger_data->hwtstamp_get_state(dev->ds)) { + int ret; + + tagger_data->hwtstamp_set_state(dev->ds, false); + + ret = ksz_ptp_enable_mode(dev, rx_on); + if (ret) + return ret; + + if (rx_on) + tagger_data->hwtstamp_set_state(dev->ds, true); + } + + return 0; +} + +int ksz_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr) +{ + struct ksz_device *dev = ds->priv; + struct ksz_ptp_data *ptp_data = &dev->ptp_data; + struct hwtstamp_config config; + int ret; + + mutex_lock(&ptp_data->lock); + + ret = copy_from_user(&config, ifr->ifr_data, sizeof(config)); + if (ret) + goto error_return; + + ret = ksz_set_hwtstamp_config(dev, port, &config); + if (ret) + goto error_return; + + /* Save the chosen configuration to be returned later. */ + ret = copy_to_user(ifr->ifr_data, &config, sizeof(config)); + +error_return: + mutex_unlock(&ptp_data->lock); + return ret; +} + /* These are function related to the ptp clock info */ static int _ksz_ptp_gettime(struct ksz_device *dev, struct timespec64 *ts) { diff --git a/drivers/net/dsa/microchip/ksz_ptp.h b/drivers/net/dsa/microchip/ksz_ptp.h index ac53b0df2733..4c024cc9d935 100644 --- a/drivers/net/dsa/microchip/ksz_ptp.h +++ b/drivers/net/dsa/microchip/ksz_ptp.h @@ -21,6 +21,8 @@ void ksz_ptp_clock_unregister(struct dsa_switch *ds); int ksz_get_ts_info(struct dsa_switch *ds, int port, struct ethtool_ts_info *ts); +int ksz_hwtstamp_get(struct dsa_switch *ds, int port, struct ifreq *ifr); +int ksz_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr); #else @@ -38,6 +40,18 @@ static inline void ksz_ptp_clock_unregister(struct dsa_switch *ds) { } #define ksz_get_ts_info NULL +static inline int ksz_hwtstamp_get(struct dsa_switch *ds, int port, + struct ifreq *ifr) +{ + return -EOPNOTSUPP; +} + +static inline int ksz_hwtstamp_set(struct dsa_switch *ds, int port, + struct ifreq *ifr) +{ + return -EOPNOTSUPP; +} + #endif /* End of CONFIG_NET_DSA_MICROCHIOP_KSZ_PTP */ #endif diff --git a/include/linux/dsa/ksz_common.h b/include/linux/dsa/ksz_common.h new file mode 100644 index 000000000000..8903bce4753b --- /dev/null +++ b/include/linux/dsa/ksz_common.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Microchip switch tag common header + * + * Copyright (C) 2021-2022 Microchip Technology Inc. + */ + +#ifndef _NET_DSA_KSZ_COMMON_H_ +#define _NET_DSA_KSZ_COMMON_H_ + +#include + +struct ksz_tagger_data { + bool (*hwtstamp_get_state)(struct dsa_switch *ds); + void (*hwtstamp_set_state)(struct dsa_switch *ds, bool on); +}; + +static inline struct ksz_tagger_data * +ksz_tagger_data(struct dsa_switch *ds) +{ + return ds->tagger_data; +} + +#endif /* _NET_DSA_KSZ_COMMON_H_ */ diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c index 37db5156f9a3..6a909a300c13 100644 --- a/net/dsa/tag_ksz.c +++ b/net/dsa/tag_ksz.c @@ -4,6 +4,7 @@ * Copyright (c) 2017 Microchip Technology */ +#include #include #include #include @@ -18,6 +19,62 @@ #define KSZ_EGRESS_TAG_LEN 1 #define KSZ_INGRESS_TAG_LEN 1 +#define KSZ_HWTS_EN 0 + +struct ksz_tagger_private { + struct ksz_tagger_data data; /* Must be first */ + unsigned long state; +}; + +static struct ksz_tagger_private * +ksz_tagger_private(struct dsa_switch *ds) +{ + return ds->tagger_data; +} + +static bool ksz_hwtstamp_get_state(struct dsa_switch *ds) +{ + struct ksz_tagger_private *priv = ksz_tagger_private(ds); + + return test_bit(KSZ_HWTS_EN, &priv->state); +} + +static void ksz_hwtstamp_set_state(struct dsa_switch *ds, bool on) +{ + struct ksz_tagger_private *priv = ksz_tagger_private(ds); + + if (on) + set_bit(KSZ_HWTS_EN, &priv->state); + else + clear_bit(KSZ_HWTS_EN, &priv->state); +} + +static void ksz_disconnect(struct dsa_switch *ds) +{ + struct ksz_tagger_private *priv = ds->tagger_data; + + kfree(priv); + ds->tagger_data = NULL; +} + +static int ksz_connect(struct dsa_switch *ds) +{ + struct ksz_tagger_data *tagger_data; + struct ksz_tagger_private *priv; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + /* Export functions for switch driver use */ + tagger_data = &priv->data; + tagger_data->hwtstamp_get_state = ksz_hwtstamp_get_state; + tagger_data->hwtstamp_set_state = ksz_hwtstamp_set_state; + ds->tagger_data = priv; + + return 0; +} + static struct sk_buff *ksz_common_rcv(struct sk_buff *skb, struct net_device *dev, unsigned int port, unsigned int len) @@ -156,6 +213,8 @@ static const struct dsa_device_ops ksz9477_netdev_ops = { .proto = DSA_TAG_PROTO_KSZ9477, .xmit = ksz9477_xmit, .rcv = ksz9477_rcv, + .connect = ksz_connect, + .disconnect = ksz_disconnect, .needed_tailroom = KSZ9477_INGRESS_TAG_LEN, }; @@ -192,6 +251,8 @@ static const struct dsa_device_ops ksz9893_netdev_ops = { .proto = DSA_TAG_PROTO_KSZ9893, .xmit = ksz9893_xmit, .rcv = ksz9477_rcv, + .connect = ksz_connect, + .disconnect = ksz_disconnect, .needed_tailroom = KSZ_INGRESS_TAG_LEN, }; @@ -250,6 +311,8 @@ static const struct dsa_device_ops lan937x_netdev_ops = { .proto = DSA_TAG_PROTO_LAN937X, .xmit = lan937x_xmit, .rcv = ksz9477_rcv, + .connect = ksz_connect, + .disconnect = ksz_disconnect, .needed_tailroom = LAN937X_EGRESS_TAG_LEN, };