disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/net/dsa/mv88e6xxx/hwtstamp.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Marvell 88E6xxx Switch hardware timestamping support
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  *
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@@ -7,11 +8,6 @@
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  *      Erik Hons <erik.hons@ni.com>
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  *      Brandon Streiff <brandon.streiff@ni.com>
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  *      Dane Wagner <dane.wagner@ni.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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  */
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12
 
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 #include "chip.h"
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@@ -151,7 +147,7 @@
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 		return -ERANGE;
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 	}
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-	mutex_lock(&chip->reg_lock);
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+	mv88e6xxx_reg_lock(chip);
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 	if (tstamp_enable) {
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 		chip->enable_count += 1;
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 		if (chip->enable_count == 1 && ptp_ops->global_enable)
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@@ -165,7 +161,7 @@
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 		if (chip->enable_count == 0 && ptp_ops->global_disable)
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 			ptp_ops->global_disable(chip);
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 	}
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-	mutex_unlock(&chip->reg_lock);
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+	mv88e6xxx_reg_unlock(chip);
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 	/* Once hardware has been configured, enable timestamp checks
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 	 * in the RX/TX paths.
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@@ -215,49 +211,20 @@
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 		-EFAULT : 0;
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 }
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-/* Get the start of the PTP header in this skb */
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-static u8 *parse_ptp_header(struct sk_buff *skb, unsigned int type)
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-{
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-	u8 *data = skb_mac_header(skb);
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-	unsigned int offset = 0;
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-
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-	if (type & PTP_CLASS_VLAN)
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-		offset += VLAN_HLEN;
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-
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-	switch (type & PTP_CLASS_PMASK) {
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-	case PTP_CLASS_IPV4:
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-		offset += ETH_HLEN + IPV4_HLEN(data + offset) + UDP_HLEN;
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-		break;
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-	case PTP_CLASS_IPV6:
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-		offset += ETH_HLEN + IP6_HLEN + UDP_HLEN;
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-		break;
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-	case PTP_CLASS_L2:
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-		offset += ETH_HLEN;
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-		break;
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-	default:
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-		return NULL;
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-	}
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-
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-	/* Ensure that the entire header is present in this packet. */
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-	if (skb->len + ETH_HLEN < offset + 34)
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-		return NULL;
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-
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-	return data + offset;
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-}
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-
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 /* Returns a pointer to the PTP header if the caller should time stamp,
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  * or NULL if the caller should not.
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  */
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-static u8 *mv88e6xxx_should_tstamp(struct mv88e6xxx_chip *chip, int port,
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-				   struct sk_buff *skb, unsigned int type)
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+static struct ptp_header *mv88e6xxx_should_tstamp(struct mv88e6xxx_chip *chip,
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+						  int port, struct sk_buff *skb,
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+						  unsigned int type)
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 {
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 	struct mv88e6xxx_port_hwtstamp *ps = &chip->port_hwtstamp[port];
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-	u8 *hdr;
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+	struct ptp_header *hdr;
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 	if (!chip->info->ptp_support)
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 		return NULL;
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-	hdr = parse_ptp_header(skb, type);
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+	hdr = ptp_parse_header(skb, type);
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 	if (!hdr)
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 		return NULL;
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230
 
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@@ -279,12 +246,11 @@
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 static int seq_match(struct sk_buff *skb, u16 ts_seqid)
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 {
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 	unsigned int type = SKB_PTP_TYPE(skb);
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-	u8 *hdr = parse_ptp_header(skb, type);
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-	__be16 *seqid;
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+	struct ptp_header *hdr;
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250
 
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-	seqid = (__be16 *)(hdr + OFF_PTP_SEQUENCE_ID);
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+	hdr = ptp_parse_header(skb, type);
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252
 
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-	return ts_seqid == ntohs(*seqid);
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+	return ts_seqid == ntohs(hdr->sequence_id);
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 }
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 static void mv88e6xxx_get_rxts(struct mv88e6xxx_chip *chip,
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@@ -305,10 +271,10 @@
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 	skb_queue_splice_tail_init(rxq, &received);
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 	spin_unlock_irqrestore(&rxq->lock, flags);
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-	mutex_lock(&chip->reg_lock);
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+	mv88e6xxx_reg_lock(chip);
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 	err = mv88e6xxx_port_ptp_read(chip, ps->port_id,
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 				      reg, buf, ARRAY_SIZE(buf));
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-	mutex_unlock(&chip->reg_lock);
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+	mv88e6xxx_reg_unlock(chip);
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 	if (err)
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 		pr_err("failed to get the receive time stamp\n");
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280
 
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@@ -318,9 +284,9 @@
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 	seq_id = buf[3];
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 	if (status & MV88E6XXX_PTP_TS_VALID) {
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-		mutex_lock(&chip->reg_lock);
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+		mv88e6xxx_reg_lock(chip);
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 		err = mv88e6xxx_port_ptp_write(chip, ps->port_id, reg, 0);
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-		mutex_unlock(&chip->reg_lock);
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+		mv88e6xxx_reg_unlock(chip);
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 		if (err)
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 			pr_err("failed to clear the receive status\n");
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 	}
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@@ -331,9 +297,9 @@
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 		if (mv88e6xxx_ts_valid(status) && seq_match(skb, seq_id)) {
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 			ns = timehi << 16 | timelo;
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-			mutex_lock(&chip->reg_lock);
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+			mv88e6xxx_reg_lock(chip);
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 			ns = timecounter_cyc2time(&chip->tstamp_tc, ns);
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-			mutex_unlock(&chip->reg_lock);
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+			mv88e6xxx_reg_unlock(chip);
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 			shwt = skb_hwtstamps(skb);
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 			memset(shwt, 0, sizeof(*shwt));
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 			shwt->hwtstamp = ns_to_ktime(ns);
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@@ -361,9 +327,9 @@
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 				   &ps->rx_queue2);
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 }
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-static int is_pdelay_resp(u8 *msgtype)
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+static int is_pdelay_resp(const struct ptp_header *hdr)
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 {
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-	return (*msgtype & 0xf) == 3;
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+	return (hdr->tsmt & 0xf) == 3;
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 }
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 bool mv88e6xxx_port_rxtstamp(struct dsa_switch *ds, int port,
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@@ -371,7 +337,7 @@
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 {
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 	struct mv88e6xxx_port_hwtstamp *ps;
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 	struct mv88e6xxx_chip *chip;
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-	u8 *hdr;
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+	struct ptp_header *hdr;
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 	chip = ds->priv;
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 	ps = &chip->port_hwtstamp[port];
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@@ -409,12 +375,12 @@
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 	if (!ps->tx_skb)
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 		return 0;
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-	mutex_lock(&chip->reg_lock);
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+	mv88e6xxx_reg_lock(chip);
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 	err = mv88e6xxx_port_ptp_read(chip, ps->port_id,
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 				      ptp_ops->dep_sts_reg,
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 				      departure_block,
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 				      ARRAY_SIZE(departure_block));
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-	mutex_unlock(&chip->reg_lock);
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+	mv88e6xxx_reg_unlock(chip);
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 	if (err)
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 		goto free_and_clear_skb;
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@@ -434,9 +400,9 @@
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 	}
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 	/* We have the timestamp; go ahead and clear valid now */
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-	mutex_lock(&chip->reg_lock);
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+	mv88e6xxx_reg_lock(chip);
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 	mv88e6xxx_port_ptp_write(chip, ps->port_id, ptp_ops->dep_sts_reg, 0);
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-	mutex_unlock(&chip->reg_lock);
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+	mv88e6xxx_reg_unlock(chip);
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 	status = departure_block[0] & MV88E6XXX_PTP_TS_STATUS_MASK;
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 	if (status != MV88E6XXX_PTP_TS_STATUS_NORMAL) {
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@@ -451,9 +417,9 @@
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 	memset(&shhwtstamps, 0, sizeof(shhwtstamps));
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 	time_raw = ((u32)departure_block[2] << 16) | departure_block[1];
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-	mutex_lock(&chip->reg_lock);
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+	mv88e6xxx_reg_lock(chip);
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 	ns = timecounter_cyc2time(&chip->tstamp_tc, time_raw);
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-	mutex_unlock(&chip->reg_lock);
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+	mv88e6xxx_reg_unlock(chip);
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 	shhwtstamps.hwtstamp = ns_to_ktime(ns);
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 	dev_dbg(chip->dev,
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@@ -507,8 +473,7 @@
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 {
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 	struct mv88e6xxx_chip *chip = ds->priv;
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 	struct mv88e6xxx_port_hwtstamp *ps = &chip->port_hwtstamp[port];
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-	__be16 *seq_ptr;
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-	u8 *hdr;
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+	struct ptp_header *hdr;
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 	if (!(skb_shinfo(clone)->tx_flags & SKBTX_HW_TSTAMP))
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 		return false;
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@@ -517,15 +482,13 @@
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 	if (!hdr)
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 		return false;
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-	seq_ptr = (__be16 *)(hdr + OFF_PTP_SEQUENCE_ID);
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-
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 	if (test_and_set_bit_lock(MV88E6XXX_HWTSTAMP_TX_IN_PROGRESS,
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 				  &ps->state))
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 		return false;
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 	ps->tx_skb = clone;
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 	ps->tx_tstamp_start = jiffies;
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-	ps->tx_seq_id = be16_to_cpup(seq_ptr);
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+	ps->tx_seq_id = be16_to_cpu(hdr->sequence_id);
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 	ptp_schedule_worker(chip->ptp_clock, 0);
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 	return true;