From 28fba67ff97fa4e0ff9f73c0524fe66455f56086 Mon Sep 17 00:00:00 2001 From: Kurt Kanzenbach Date: Tue, 18 Aug 2020 12:32:45 +0200 Subject: net: dsa: mv88e6xxx: Use generic helper function In order to reduce code duplication between ptp drivers, generic helper functions were introduced. Use them. Signed-off-by: Kurt Kanzenbach Tested-by: Richard Cochran Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx/hwtstamp.c | 59 ++++++++---------------------------- 1 file changed, 13 insertions(+), 46 deletions(-) (limited to 'drivers/net') diff --git a/drivers/net/dsa/mv88e6xxx/hwtstamp.c b/drivers/net/dsa/mv88e6xxx/hwtstamp.c index a4c488b12e8f..094d17a1d037 100644 --- a/drivers/net/dsa/mv88e6xxx/hwtstamp.c +++ b/drivers/net/dsa/mv88e6xxx/hwtstamp.c @@ -211,49 +211,20 @@ int mv88e6xxx_port_hwtstamp_get(struct dsa_switch *ds, int port, -EFAULT : 0; } -/* Get the start of the PTP header in this skb */ -static u8 *parse_ptp_header(struct sk_buff *skb, unsigned int type) -{ - u8 *data = skb_mac_header(skb); - unsigned int offset = 0; - - if (type & PTP_CLASS_VLAN) - offset += VLAN_HLEN; - - switch (type & PTP_CLASS_PMASK) { - case PTP_CLASS_IPV4: - offset += ETH_HLEN + IPV4_HLEN(data + offset) + UDP_HLEN; - break; - case PTP_CLASS_IPV6: - offset += ETH_HLEN + IP6_HLEN + UDP_HLEN; - break; - case PTP_CLASS_L2: - offset += ETH_HLEN; - break; - default: - return NULL; - } - - /* Ensure that the entire header is present in this packet. */ - if (skb->len + ETH_HLEN < offset + 34) - return NULL; - - return data + offset; -} - /* Returns a pointer to the PTP header if the caller should time stamp, * or NULL if the caller should not. */ -static u8 *mv88e6xxx_should_tstamp(struct mv88e6xxx_chip *chip, int port, - struct sk_buff *skb, unsigned int type) +static struct ptp_header *mv88e6xxx_should_tstamp(struct mv88e6xxx_chip *chip, + int port, struct sk_buff *skb, + unsigned int type) { struct mv88e6xxx_port_hwtstamp *ps = &chip->port_hwtstamp[port]; - u8 *hdr; + struct ptp_header *hdr; if (!chip->info->ptp_support) return NULL; - hdr = parse_ptp_header(skb, type); + hdr = ptp_parse_header(skb, type); if (!hdr) return NULL; @@ -275,12 +246,11 @@ static int mv88e6xxx_ts_valid(u16 status) static int seq_match(struct sk_buff *skb, u16 ts_seqid) { unsigned int type = SKB_PTP_TYPE(skb); - u8 *hdr = parse_ptp_header(skb, type); - __be16 *seqid; + struct ptp_header *hdr; - seqid = (__be16 *)(hdr + OFF_PTP_SEQUENCE_ID); + hdr = ptp_parse_header(skb, type); - return ts_seqid == ntohs(*seqid); + return ts_seqid == ntohs(hdr->sequence_id); } static void mv88e6xxx_get_rxts(struct mv88e6xxx_chip *chip, @@ -357,9 +327,9 @@ static void mv88e6xxx_rxtstamp_work(struct mv88e6xxx_chip *chip, &ps->rx_queue2); } -static int is_pdelay_resp(u8 *msgtype) +static int is_pdelay_resp(const struct ptp_header *hdr) { - return (*msgtype & 0xf) == 3; + return (hdr->tsmt & 0xf) == 3; } bool mv88e6xxx_port_rxtstamp(struct dsa_switch *ds, int port, @@ -367,7 +337,7 @@ bool mv88e6xxx_port_rxtstamp(struct dsa_switch *ds, int port, { struct mv88e6xxx_port_hwtstamp *ps; struct mv88e6xxx_chip *chip; - u8 *hdr; + struct ptp_header *hdr; chip = ds->priv; ps = &chip->port_hwtstamp[port]; @@ -503,8 +473,7 @@ bool mv88e6xxx_port_txtstamp(struct dsa_switch *ds, int port, { struct mv88e6xxx_chip *chip = ds->priv; struct mv88e6xxx_port_hwtstamp *ps = &chip->port_hwtstamp[port]; - __be16 *seq_ptr; - u8 *hdr; + struct ptp_header *hdr; if (!(skb_shinfo(clone)->tx_flags & SKBTX_HW_TSTAMP)) return false; @@ -513,15 +482,13 @@ bool mv88e6xxx_port_txtstamp(struct dsa_switch *ds, int port, if (!hdr) return false; - seq_ptr = (__be16 *)(hdr + OFF_PTP_SEQUENCE_ID); - if (test_and_set_bit_lock(MV88E6XXX_HWTSTAMP_TX_IN_PROGRESS, &ps->state)) return false; ps->tx_skb = clone; ps->tx_tstamp_start = jiffies; - ps->tx_seq_id = be16_to_cpup(seq_ptr); + ps->tx_seq_id = be16_to_cpu(hdr->sequence_id); ptp_schedule_worker(chip->ptp_clock, 0); return true; -- cgit v1.2.3-59-g8ed1b