From patchwork Sat Dec 19 19:58:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 11983689 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=-16.8 required=3.0 tests=BAYES_00, 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 87190C3526F for ; Sat, 19 Dec 2020 19:59:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A49723A00 for ; Sat, 19 Dec 2020 19:59:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727677AbgLST7m (ORCPT ); Sat, 19 Dec 2020 14:59:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727553AbgLST7l (ORCPT ); Sat, 19 Dec 2020 14:59:41 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A9ECDC061282 for ; Sat, 19 Dec 2020 11:58:45 -0800 (PST) Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kqiNA-0001pi-SN; Sat, 19 Dec 2020 20:58:36 +0100 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1kqiN8-0007c7-9w; Sat, 19 Dec 2020 20:58:34 +0100 From: Oleksij Rempel To: Andrew Lunn , Vivien Didelot , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Jakub Kicinski , Russell King Cc: Oleksij Rempel , Pengutronix Kernel Team , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org Subject: [PATCH v6 net-next 2/2] net: dsa: qca: ar9331: export stats64 Date: Sat, 19 Dec 2020 20:58:33 +0100 Message-Id: <20201219195833.29197-3-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201219195833.29197-1-o.rempel@pengutronix.de> References: <20201219195833.29197-1-o.rempel@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Add stats support for the ar9331 switch. Signed-off-by: Oleksij Rempel --- drivers/net/dsa/qca/ar9331.c | 163 ++++++++++++++++++++++++++++++++++- 1 file changed, 162 insertions(+), 1 deletion(-) diff --git a/drivers/net/dsa/qca/ar9331.c b/drivers/net/dsa/qca/ar9331.c index 4d49c5f2b790..896fb221b369 100644 --- a/drivers/net/dsa/qca/ar9331.c +++ b/drivers/net/dsa/qca/ar9331.c @@ -101,6 +101,9 @@ AR9331_SW_PORT_STATUS_RX_FLOW_EN | AR9331_SW_PORT_STATUS_TX_FLOW_EN | \ AR9331_SW_PORT_STATUS_SPEED_M) +/* MIB registers */ +#define AR9331_MIB_COUNTER(x) (0x20000 + ((x) * 0x100)) + /* Phy bypass mode * ------------------------------------------------------------------------ * Bit: | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 |11 |12 |13 |14 |15 | @@ -154,6 +157,66 @@ #define AR9331_SW_MDIO_POLL_SLEEP_US 1 #define AR9331_SW_MDIO_POLL_TIMEOUT_US 20 +/* The interval should be small enough to avoid overflow of 32bit MIBs */ +/* + * FIXME: until we can read MIBs from stats64 call directly (i.e. sleep + * there), we have to poll stats more frequently then it is actually needed. + * For overflow protection, normally, 100 sec interval should have been OK. + */ +#define STATS_INTERVAL_JIFFIES (3 * HZ) + +struct ar9331_sw_stats_raw { + u32 rxbroad; /* 0x00 */ + u32 rxpause; /* 0x04 */ + u32 rxmulti; /* 0x08 */ + u32 rxfcserr; /* 0x0c */ + u32 rxalignerr; /* 0x10 */ + u32 rxrunt; /* 0x14 */ + u32 rxfragment; /* 0x18 */ + u32 rx64byte; /* 0x1c */ + u32 rx128byte; /* 0x20 */ + u32 rx256byte; /* 0x24 */ + u32 rx512byte; /* 0x28 */ + u32 rx1024byte; /* 0x2c */ + u32 rx1518byte; /* 0x30 */ + u32 rxmaxbyte; /* 0x34 */ + u32 rxtoolong; /* 0x38 */ + u32 rxgoodbyte; /* 0x3c */ + u32 rxgoodbyte_hi; + u32 rxbadbyte; /* 0x44 */ + u32 rxbadbyte_hi; + u32 rxoverflow; /* 0x4c */ + u32 filtered; /* 0x50 */ + u32 txbroad; /* 0x54 */ + u32 txpause; /* 0x58 */ + u32 txmulti; /* 0x5c */ + u32 txunderrun; /* 0x60 */ + u32 tx64byte; /* 0x64 */ + u32 tx128byte; /* 0x68 */ + u32 tx256byte; /* 0x6c */ + u32 tx512byte; /* 0x70 */ + u32 tx1024byte; /* 0x74 */ + u32 tx1518byte; /* 0x78 */ + u32 txmaxbyte; /* 0x7c */ + u32 txoversize; /* 0x80 */ + u32 txbyte; /* 0x84 */ + u32 txbyte_hi; + u32 txcollision; /* 0x8c */ + u32 txabortcol; /* 0x90 */ + u32 txmulticol; /* 0x94 */ + u32 txsinglecol; /* 0x98 */ + u32 txexcdefer; /* 0x9c */ + u32 txdefer; /* 0xa0 */ + u32 txlatecol; /* 0xa4 */ +}; + +struct ar9331_sw_port { + int idx; + struct delayed_work mib_read; + struct rtnl_link_stats64 stats; + struct spinlock stats_lock; +}; + struct ar9331_sw_priv { struct device *dev; struct dsa_switch ds; @@ -165,8 +228,17 @@ struct ar9331_sw_priv { struct mii_bus *sbus; /* mdio slave */ struct regmap *regmap; struct reset_control *sw_reset; + struct ar9331_sw_port port[AR9331_SW_PORTS]; }; +static struct ar9331_sw_priv *ar9331_sw_port_to_priv(struct ar9331_sw_port *port) +{ + struct ar9331_sw_port *p = port - port->idx; + + return (struct ar9331_sw_priv *)((void *)p - + offsetof(struct ar9331_sw_priv, port)); +} + /* Warning: switch reset will reset last AR9331_SW_MDIO_PHY_MODE_PAGE request * If some kind of optimization is used, the request should be repeated. */ @@ -424,6 +496,7 @@ static void ar9331_sw_phylink_mac_link_down(struct dsa_switch *ds, int port, phy_interface_t interface) { struct ar9331_sw_priv *priv = (struct ar9331_sw_priv *)ds->priv; + struct ar9331_sw_port *p = &priv->port[port]; struct regmap *regmap = priv->regmap; int ret; @@ -431,6 +504,8 @@ static void ar9331_sw_phylink_mac_link_down(struct dsa_switch *ds, int port, AR9331_SW_PORT_STATUS_MAC_MASK, 0); if (ret) dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret); + + cancel_delayed_work_sync(&p->mib_read); } static void ar9331_sw_phylink_mac_link_up(struct dsa_switch *ds, int port, @@ -441,10 +516,13 @@ static void ar9331_sw_phylink_mac_link_up(struct dsa_switch *ds, int port, bool tx_pause, bool rx_pause) { struct ar9331_sw_priv *priv = (struct ar9331_sw_priv *)ds->priv; + struct ar9331_sw_port *p = &priv->port[port]; struct regmap *regmap = priv->regmap; u32 val; int ret; + schedule_delayed_work(&p->mib_read, 0); + val = AR9331_SW_PORT_STATUS_MAC_MASK; switch (speed) { case SPEED_1000: @@ -477,6 +555,73 @@ static void ar9331_sw_phylink_mac_link_up(struct dsa_switch *ds, int port, dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret); } +static void ar9331_read_stats(struct ar9331_sw_port *port) +{ + struct ar9331_sw_priv *priv = ar9331_sw_port_to_priv(port); + struct rtnl_link_stats64 *stats = &port->stats; + struct ar9331_sw_stats_raw raw; + int ret; + + /* Do the slowest part first, to avoid needless locking for long time */ + ret = regmap_bulk_read(priv->regmap, AR9331_MIB_COUNTER(port->idx), + &raw, sizeof(raw) / sizeof(u32)); + if (ret) { + dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret); + return; + } + /* All MIB counters are cleared automatically on read */ + + spin_lock(&port->stats_lock); + + stats->rx_bytes += raw.rxgoodbyte; + stats->tx_bytes += raw.txbyte; + + stats->rx_packets += raw.rx64byte + raw.rx128byte + raw.rx256byte + + raw.rx512byte + raw.rx1024byte + raw.rx1518byte + raw.rxmaxbyte; + stats->tx_packets += raw.tx64byte + raw.tx128byte + raw.tx256byte + + raw.tx512byte + raw.tx1024byte + raw.tx1518byte + raw.txmaxbyte; + + stats->rx_length_errors += raw.rxrunt + raw.rxfragment + raw.rxtoolong; + stats->rx_crc_errors += raw.rxfcserr; + stats->rx_frame_errors += raw.rxalignerr; + stats->rx_missed_errors += raw.rxoverflow; + stats->rx_nohandler += raw.filtered; + stats->rx_errors += raw.rxfcserr + raw.rxalignerr + raw.rxrunt + + raw.rxfragment + raw.rxoverflow + raw.filtered + raw.rxtoolong; + + stats->tx_window_errors += raw.txlatecol; + stats->tx_fifo_errors += raw.txunderrun; + stats->tx_aborted_errors += raw.txabortcol; + stats->tx_errors += raw.txoversize + raw.txabortcol + raw.txunderrun + + raw.txlatecol; + + stats->multicast += raw.rxmulti; + stats->collisions += raw.txcollision; + + spin_unlock(&port->stats_lock); +} + +static void ar9331_do_stats_poll(struct work_struct *work) +{ + struct ar9331_sw_port *port = container_of(work, struct ar9331_sw_port, + mib_read.work); + + ar9331_read_stats(port); + + schedule_delayed_work(&port->mib_read, STATS_INTERVAL_JIFFIES); +} + +static void ar9331_get_stats64(struct dsa_switch *ds, int port, + struct rtnl_link_stats64 *s) +{ + struct ar9331_sw_priv *priv = (struct ar9331_sw_priv *)ds->priv; + struct ar9331_sw_port *p = &priv->port[port]; + + spin_lock(&p->stats_lock); + memcpy(s, &p->stats, sizeof(*s)); + spin_unlock(&p->stats_lock); +} + static const struct dsa_switch_ops ar9331_sw_ops = { .get_tag_protocol = ar9331_sw_get_tag_protocol, .setup = ar9331_sw_setup, @@ -485,6 +630,7 @@ static const struct dsa_switch_ops ar9331_sw_ops = { .phylink_mac_config = ar9331_sw_phylink_mac_config, .phylink_mac_link_down = ar9331_sw_phylink_mac_link_down, .phylink_mac_link_up = ar9331_sw_phylink_mac_link_up, + .get_stats64 = ar9331_get_stats64, }; static irqreturn_t ar9331_sw_irq(int irq, void *data) @@ -796,7 +942,7 @@ static int ar9331_sw_probe(struct mdio_device *mdiodev) { struct ar9331_sw_priv *priv; struct dsa_switch *ds; - int ret; + int ret, i; priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) @@ -831,6 +977,14 @@ static int ar9331_sw_probe(struct mdio_device *mdiodev) ds->ops = &priv->ops; dev_set_drvdata(&mdiodev->dev, priv); + for (i = 0; i < ARRAY_SIZE(priv->port); i++) { + struct ar9331_sw_port *port = &priv->port[i]; + + port->idx = i; + spin_lock_init(&port->stats_lock); + INIT_DELAYED_WORK(&port->mib_read, ar9331_do_stats_poll); + } + ret = dsa_register_switch(ds); if (ret) goto err_remove_irq; @@ -846,6 +1000,13 @@ static int ar9331_sw_probe(struct mdio_device *mdiodev) static void ar9331_sw_remove(struct mdio_device *mdiodev) { struct ar9331_sw_priv *priv = dev_get_drvdata(&mdiodev->dev); + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(priv->port); i++) { + struct ar9331_sw_port *port = &priv->port[i]; + + cancel_delayed_work_sync(&port->mib_read); + } irq_domain_remove(priv->irqdomain); mdiobus_unregister(priv->mbus);