1 files changed, 33 insertions, 29 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
index d4b6c997141d..81d96a40d5a7 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -617,7 +617,7 @@ ice_ptp_is_tx_tracker_up(struct ice_ptp_tx *tx)
 }
 
 /**
- * ice_ptp_tx_tstamp - Process Tx timestamps for a port
+ * ice_ptp_process_tx_tstamp - Process Tx timestamps for a port
  * @tx: the PTP Tx timestamp tracker
  *
  * Process timestamps captured by the PHY associated with this port. To do
@@ -633,15 +633,6 @@ ice_ptp_is_tx_tracker_up(struct ice_ptp_tx *tx)
  * 6) extend the 40 bit timestamp value to get a 64 bit timestamp value
  * 7) send this 64 bit timestamp to the stack
  *
- * Returns true if all timestamps were handled, and false if any slots remain
- * without a timestamp.
- *
- * After looping, if we still have waiting SKBs, return false. This may cause
- * us effectively poll even when not strictly necessary. We do this because
- * it's possible a new timestamp was requested around the same time as the
- * interrupt. In some cases hardware might not interrupt us again when the
- * timestamp is captured.
- *
  * Note that we do not hold the tracking lock while reading the Tx timestamp.
  * This is because reading the timestamp requires taking a mutex that might
  * sleep.
@@ -673,10 +664,9 @@ ice_ptp_is_tx_tracker_up(struct ice_ptp_tx *tx)
  * the packet will never be sent by hardware and discard it without reading
  * the timestamp register.
  */
-static bool ice_ptp_tx_tstamp(struct ice_ptp_tx *tx)
+static void ice_ptp_process_tx_tstamp(struct ice_ptp_tx *tx)
 {
 	struct ice_ptp_port *ptp_port;
-	bool more_timestamps;
 	struct ice_pf *pf;
 	struct ice_hw *hw;
 	u64 tstamp_ready;
@@ -685,7 +675,7 @@ static bool ice_ptp_tx_tstamp(struct ice_ptp_tx *tx)
 	u8 idx;
 
 	if (!tx->init)
-		return true;
+		return;
 
 	ptp_port = container_of(tx, struct ice_ptp_port, tx);
 	pf = ptp_port_to_pf(ptp_port);
@@ -694,7 +684,7 @@ static bool ice_ptp_tx_tstamp(struct ice_ptp_tx *tx)
 	/* Read the Tx ready status first */
 	err = ice_get_phy_tx_tstamp_ready(hw, tx->block, &tstamp_ready);
 	if (err)
-		return false;
+		return;
 
 	/* Drop packets if the link went down */
 	link_up = ptp_port->link_up;
@@ -782,15 +772,34 @@ skip_ts_read:
 		skb_tstamp_tx(skb, &shhwtstamps);
 		dev_kfree_skb_any(skb);
 	}
+}
 
-	/* Check if we still have work to do. If so, re-queue this task to
-	 * poll for remaining timestamps.
-	 */
+/**
+ * ice_ptp_tx_tstamp - Process Tx timestamps for this function.
+ * @tx: Tx tracking structure to initialize
+ *
+ * Returns: ICE_TX_TSTAMP_WORK_PENDING if there are any outstanding incomplete
+ * Tx timestamps, or ICE_TX_TSTAMP_WORK_DONE otherwise.
+ */
+static enum ice_tx_tstamp_work ice_ptp_tx_tstamp(struct ice_ptp_tx *tx)
+{
+	bool more_timestamps;
+
+	if (!tx->init)
+		return ICE_TX_TSTAMP_WORK_DONE;
+
+	/* Process the Tx timestamp tracker */
+	ice_ptp_process_tx_tstamp(tx);
+
+	/* Check if there are outstanding Tx timestamps */
 	spin_lock(&tx->lock);
 	more_timestamps = tx->init && !bitmap_empty(tx->in_use, tx->len);
 	spin_unlock(&tx->lock);
 
-	return !more_timestamps;
+	if (more_timestamps)
+		return ICE_TX_TSTAMP_WORK_PENDING;
+
+	return ICE_TX_TSTAMP_WORK_DONE;
 }
 
 /**
@@ -1458,15 +1467,11 @@ static int ice_ptp_adjfine(struct ptp_clock_info *info, long scaled_ppm)
 }
 
 /**
- * ice_ptp_extts_work - Workqueue task function
- * @work: external timestamp work structure
- *
- * Service for PTP external clock event
+ * ice_ptp_extts_event - Process PTP external clock event
+ * @pf: Board private structure
  */
-static void ice_ptp_extts_work(struct kthread_work *work)
+void ice_ptp_extts_event(struct ice_pf *pf)
 {
-	struct ice_ptp *ptp = container_of(work, struct ice_ptp, extts_work);
-	struct ice_pf *pf = container_of(ptp, struct ice_pf, ptp);
 	struct ptp_clock_event event;
 	struct ice_hw *hw = &pf->hw;
 	u8 chan, tmr_idx;
@@ -2430,9 +2435,10 @@ s8 ice_ptp_request_ts(struct ice_ptp_tx *tx, struct sk_buff *skb)
  * ice_ptp_process_ts - Process the PTP Tx timestamps
  * @pf: Board private structure
  *
- * Returns true if timestamps are processed.
+ * Returns: ICE_TX_TSTAMP_WORK_PENDING if there are any outstanding Tx
+ * timestamps that need processing, and ICE_TX_TSTAMP_WORK_DONE otherwise.
  */
-bool ice_ptp_process_ts(struct ice_pf *pf)
+enum ice_tx_tstamp_work ice_ptp_process_ts(struct ice_pf *pf)
 {
 	return ice_ptp_tx_tstamp(&pf->ptp.port.tx);
 }
@@ -2558,7 +2564,6 @@ void ice_ptp_prepare_for_reset(struct ice_pf *pf)
 	ice_ptp_cfg_timestamp(pf, false);
 
 	kthread_cancel_delayed_work_sync(&ptp->work);
-	kthread_cancel_work_sync(&ptp->extts_work);
 
 	if (test_bit(ICE_PFR_REQ, pf->state))
 		return;
@@ -2656,7 +2661,6 @@ static int ice_ptp_init_work(struct ice_pf *pf, struct ice_ptp *ptp)
 
 	/* Initialize work functions */
 	kthread_init_delayed_work(&ptp->work, ice_ptp_periodic_work);
-	kthread_init_work(&ptp->extts_work, ice_ptp_extts_work);
 
 	/* Allocate a kworker for handling work required for the ports
 	 * connected to the PTP hardware clock.