1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
index 7bb4005a67f6..698f906e2e59 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -2764,6 +2764,55 @@ enum ice_tx_tstamp_work ice_ptp_process_ts(struct ice_pf *pf)
 }
 
 /**
+ * ice_ptp_ts_irq - Process the PTP Tx timestamps in IRQ context
+ * @pf: Board private structure
+ *
+ * Return: IRQ_WAKE_THREAD if Tx timestamp read has to be handled in the bottom
+ *         half of the interrupt and IRQ_HANDLED otherwise.
+ */
+irqreturn_t ice_ptp_ts_irq(struct ice_pf *pf)
+{
+	struct ice_hw *hw = &pf->hw;
+
+	switch (hw->mac_type) {
+	case ICE_MAC_E810:
+		/* E810 capable of low latency timestamping with interrupt can
+		 * request a single timestamp in the top half and wait for
+		 * a second LL TS interrupt from the FW when it's ready.
+		 */
+		if (hw->dev_caps.ts_dev_info.ts_ll_int_read) {
+			struct ice_ptp_tx *tx = &pf->ptp.port.tx;
+			u8 idx;
+
+			if (!ice_pf_state_is_nominal(pf))
+				return IRQ_HANDLED;
+
+			spin_lock(&tx->lock);
+			idx = find_next_bit_wrap(tx->in_use, tx->len,
+						 tx->last_ll_ts_idx_read + 1);
+			if (idx != tx->len)
+				ice_ptp_req_tx_single_tstamp(tx, idx);
+			spin_unlock(&tx->lock);
+
+			return IRQ_HANDLED;
+		}
+		fallthrough; /* non-LL_TS E810 */
+	case ICE_MAC_GENERIC:
+	case ICE_MAC_GENERIC_3K_E825:
+		/* All other devices process timestamps in the bottom half due
+		 * to sleeping or polling.
+		 */
+		if (!ice_ptp_pf_handles_tx_interrupt(pf))
+			return IRQ_HANDLED;
+
+		set_bit(ICE_MISC_THREAD_TX_TSTAMP, pf->misc_thread);
+		return IRQ_WAKE_THREAD;
+	default:
+		return IRQ_HANDLED;
+	}
+}
+
+/**
  * ice_ptp_maybe_trigger_tx_interrupt - Trigger Tx timstamp interrupt
  * @pf: Board private structure
  *