@@ -446,41 +446,22 @@ static const struct ptp_clock_info cpts_info = {
static int cpts_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;
- u16 *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 = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
- *mtype_seqid = (*msgtype & MESSAGE_TYPE_MASK) << MESSAGE_TYPE_SHIFT;
- *mtype_seqid |= (ntohs(*seqid) & SEQUENCE_ID_MASK) << SEQUENCE_ID_SHIFT;
+ *mtype_seqid = (msgtype & MESSAGE_TYPE_MASK) << MESSAGE_TYPE_SHIFT;
+ *mtype_seqid |= (seqid & SEQUENCE_ID_MASK) << SEQUENCE_ID_SHIFT;
return 1;
}
@@ -528,7 +509,11 @@ void cpts_rx_timestamp(struct cpts *cpts, struct sk_buff *skb)
int ret;
u64 ns;
+ /* cpts_rx_timestamp() is called before eth_type_trans(), so
+ * skb MAC Hdr properties are not configured yet. Hence need to
+ * reset skb MAC header here
+ */
+ skb_reset_mac_header(skb);
ret = cpts_skb_get_mtype_seqid(skb, &skb_cb->skb_mtype_seqid);
if (!ret)
return;
--
In order to reduce code duplication between ptp drivers, generic helper functions were introduced. Use them. Suggested-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de> --- drivers/net/ethernet/ti/cpts.c | 42 ++++++++++++---------------------- 1 file changed, 14 insertions(+), 28 deletions(-) 2.20.1