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ethernet: ti: am65-cpts: 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 <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kurt Kanzenbach 2020-08-18 12:32:47 +02:00 committed by David S. Miller
parent 7b2b28c678
commit 4bccb5d043
1 changed files with 9 additions and 28 deletions
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37
drivers/net/ethernet/ti/am65-cpts.c
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@ -748,42 +748,23 @@ EXPORT_SYMBOL_GPL(am65_cpts_rx_enable);
static int am65_skb_get_mtype_seqid(struct sk_buff *skb, u32 *mtype_seqid)
{
unsigned int ptp_class = ptp_classify_raw(skb);
u8 *msgtype, *data = skb->data;
unsigned int offset = 0;
__be16 *seqid;
struct ptp_header *hdr;
u8 msgtype;
u16 seqid;
if (ptp_class == PTP_CLASS_NONE)
return 0;
if (ptp_class & PTP_CLASS_VLAN)
offset += VLAN_HLEN;
switch (ptp_class & 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 0;
}
if (skb->len + ETH_HLEN < offset + OFF_PTP_SEQUENCE_ID + sizeof(*seqid))
hdr = ptp_parse_header(skb, ptp_class);
if (!hdr)
return 0;
if (unlikely(ptp_class & PTP_CLASS_V1))
msgtype = data + offset + OFF_PTP_CONTROL;
else
msgtype = data + offset;
msgtype = ptp_get_msgtype(hdr, ptp_class);
seqid = ntohs(hdr->sequence_id);
seqid = (__be16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
*mtype_seqid = (*msgtype << AM65_CPTS_EVENT_1_MESSAGE_TYPE_SHIFT) &
*mtype_seqid = (msgtype << AM65_CPTS_EVENT_1_MESSAGE_TYPE_SHIFT) &
AM65_CPTS_EVENT_1_MESSAGE_TYPE_MASK;
*mtype_seqid |= (ntohs(*seqid) & AM65_CPTS_EVENT_1_SEQUENCE_ID_MASK);
*mtype_seqid |= (seqid & AM65_CPTS_EVENT_1_SEQUENCE_ID_MASK);
return 1;
}