@@ -906,6 +906,71 @@ static int am65_skb_get_mtype_seqid(struct sk_buff *skb, u32 *mtype_seqid)
return 1;
}
+static u64 am65_cpts_find_rx_ts(struct am65_cpts *cpts, u32 skb_mtype_seqid)
+{
+ struct list_head *this, *next;
+ struct am65_cpts_event *event;
+ unsigned long flags;
+ u32 mtype_seqid;
+ u64 ns = 0;
+
+ am65_cpts_fifo_read(cpts);
+ spin_lock_irqsave(&cpts->lock, flags);
+ list_for_each_safe(this, next, &cpts->events) {
+ event = list_entry(this, struct am65_cpts_event, list);
+ if (time_after(jiffies, event->tmo)) {
+ list_del_init(&event->list);
+ list_add(&event->list, &cpts->pool);
+ continue;
+ }
+
+ mtype_seqid = event->event1 &
+ (AM65_CPTS_EVENT_1_MESSAGE_TYPE_MASK |
+ AM65_CPTS_EVENT_1_SEQUENCE_ID_MASK |
+ AM65_CPTS_EVENT_1_EVENT_TYPE_MASK);
+
+ if (mtype_seqid == skb_mtype_seqid) {
+ ns = event->timestamp;
+ list_del_init(&event->list);
+ list_add(&event->list, &cpts->pool);
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&cpts->lock, flags);
+
+ return ns;
+}
+
+void am65_cpts_rx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb)
+{
+ struct am65_cpts_skb_cb_data *skb_cb = (struct am65_cpts_skb_cb_data *)skb->cb;
+ struct skb_shared_hwtstamps *ssh;
+ int ret;
+ u64 ns;
+
+ /* am65_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 = am65_skb_get_mtype_seqid(skb, &skb_cb->skb_mtype_seqid);
+ if (!ret)
+ return; /* if not PTP class packet */
+
+ skb_cb->skb_mtype_seqid |= (AM65_CPTS_EV_RX << AM65_CPTS_EVENT_1_EVENT_TYPE_SHIFT);
+
+ dev_dbg(cpts->dev, "%s mtype seqid %08x\n", __func__, skb_cb->skb_mtype_seqid);
+
+ ns = am65_cpts_find_rx_ts(cpts, skb_cb->skb_mtype_seqid);
+ if (!ns)
+ return;
+
+ ssh = skb_hwtstamps(skb);
+ memset(ssh, 0, sizeof(*ssh));
+ ssh->hwtstamp = ns_to_ktime(ns);
+}
+EXPORT_SYMBOL_GPL(am65_cpts_rx_timestamp);
+
/**
* am65_cpts_tx_timestamp - save tx packet for timestamping
* @cpts: cpts handle
@@ -22,6 +22,7 @@ void am65_cpts_release(struct am65_cpts *cpts);
struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs,
struct device_node *node);
int am65_cpts_phc_index(struct am65_cpts *cpts);
+void am65_cpts_rx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb);
void am65_cpts_tx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb);
void am65_cpts_prep_tx_timestamp(struct am65_cpts *cpts, struct sk_buff *skb);
void am65_cpts_rx_enable(struct am65_cpts *cpts, bool en);
@@ -48,6 +49,11 @@ static inline int am65_cpts_phc_index(struct am65_cpts *cpts)
return -1;
}
+static inline void am65_cpts_rx_timestamp(struct am65_cpts *cpts,
+ struct sk_buff *skb)
+{
+}
+
static inline void am65_cpts_tx_timestamp(struct am65_cpts *cpts,
struct sk_buff *skb)
{
CPTS module supports capturing timestamp for every packet it receives, add a new function named "am65_cpts_find_rx_ts()" to get the timestamp of received packets from CPTS FIFO. Add another function named "am65_cpts_rx_timestamp()" which internally calls "am65_cpts_find_rx_ts()" function and timestamps the received PTP packets. Signed-off-by: Chintan Vankar <c-vankar@ti.com> --- Changes from v3 to v4: - No change in v4. Link to v3: https://lore.kernel.org/r/20240320102600.3418248-1-c-vankar@ti.com/ drivers/net/ethernet/ti/am65-cpts.c | 65 +++++++++++++++++++++++++++++ drivers/net/ethernet/ti/am65-cpts.h | 6 +++ 2 files changed, 71 insertions(+)