ice: Implement Tx interrupt enablement functions

Introduce functions enabling/disabling Tx TS interrupts
for the E822 and ETH56G PHYs

Signed-off-by: Sergey Temerkhanov <sergey.temerkhanov@intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20240528-next-2024-05-28-ptp-refactors-v1-3-c082739bb6f6@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

3 files changed, 66 insertions, 35 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
index cca9d09b2d61..412555194c97 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -1457,42 +1457,46 @@ void ice_ptp_link_change(struct ice_pf *pf, u8 port, bool linkup)
  * @ena: bool value to enable or disable interrupt
  * @threshold: Minimum number of packets at which intr is triggered
  *
- * Utility function to enable or disable Tx timestamp interrupt and threshold
+ * Utility function to configure all the PHY interrupt settings, including
+ * whether the PHY interrupt is enabled, and what threshold to use. Also
+ * configures The E82X timestamp owner to react to interrupts from all PHYs.
+ *
+ * Return: 0 on success, -EOPNOTSUPP when PHY model incorrect, other error codes
+ * when failed to configure PHY interrupt for E82X
  */
 static int ice_ptp_cfg_phy_interrupt(struct ice_pf *pf, bool ena, u32 threshold)
 {
+	struct device *dev = ice_pf_to_dev(pf);
 	struct ice_hw *hw = &pf->hw;
-	int err = 0;
-	int quad;
-	u32 val;
 
 	ice_ptp_reset_ts_memory(hw);
 
-	for (quad = 0; quad < ICE_GET_QUAD_NUM(hw->ptp.num_lports); quad++) {
-		err = ice_read_quad_reg_e82x(hw, quad, Q_REG_TX_MEM_GBL_CFG,
-					     &val);
-		if (err)
-			break;
-
-		if (ena) {
-			val |= Q_REG_TX_MEM_GBL_CFG_INTR_ENA_M;
-			val &= ~Q_REG_TX_MEM_GBL_CFG_INTR_THR_M;
-			val |= FIELD_PREP(Q_REG_TX_MEM_GBL_CFG_INTR_THR_M,
-					  threshold);
-		} else {
-			val &= ~Q_REG_TX_MEM_GBL_CFG_INTR_ENA_M;
+	switch (hw->ptp.phy_model) {
+	case ICE_PHY_E82X: {
+		int quad;
+
+		for (quad = 0; quad < ICE_GET_QUAD_NUM(hw->ptp.num_lports);
+		     quad++) {
+			int err;
+
+			err = ice_phy_cfg_intr_e82x(hw, quad, ena, threshold);
+			if (err) {
+				dev_err(dev, "Failed to configure PHY interrupt for quad %d, err %d\n",
+					quad, err);
+				return err;
+			}
 		}
 
-		err = ice_write_quad_reg_e82x(hw, quad, Q_REG_TX_MEM_GBL_CFG,
-					      val);
-		if (err)
-			break;
+		return 0;
+	}
+	case ICE_PHY_E810:
+		return 0;
+	case ICE_PHY_UNSUP:
+	default:
+		dev_warn(dev, "%s: Unexpected PHY model %d\n", __func__,
+			 hw->ptp.phy_model);
+		return -EOPNOTSUPP;
 	}
-
-	if (err)
-		dev_err(ice_pf_to_dev(pf), "PTP failed in intr ena, err %d\n",
-			err);
-	return err;
 }
 
 /**
@@ -3010,12 +3014,10 @@ static int ice_ptp_init_owner(struct ice_pf *pf)
 	/* Release the global hardware lock */
 	ice_ptp_unlock(hw);
 
-	if (!ice_is_e810(hw)) {
-		/* Enable quad interrupts */
-		err = ice_ptp_cfg_phy_interrupt(pf, true, 1);
-		if (err)
-			goto err_exit;
-	}
+	/* Configure PHY interrupt settings */
+	err = ice_ptp_cfg_phy_interrupt(pf, true, 1);
+	if (err)
+		goto err_exit;
 
 	/* Ensure we have a clock device */
 	err = ice_ptp_create_clock(pf);
diff --git a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
index 43aa83bc54c2..0a4026c8a3ba 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
@@ -2720,6 +2720,37 @@ ice_get_phy_tx_tstamp_ready_e82x(struct ice_hw *hw, u8 quad, u64 *tstamp_ready)
 }
 
 /**
+ * ice_phy_cfg_intr_e82x - Configure TX timestamp interrupt
+ * @hw: pointer to the HW struct
+ * @quad: the timestamp quad
+ * @ena: enable or disable interrupt
+ * @threshold: interrupt threshold
+ *
+ * Configure TX timestamp interrupt for the specified quad
+ *
+ * Return: 0 on success, other error codes when failed to read/write quad
+ */
+
+int ice_phy_cfg_intr_e82x(struct ice_hw *hw, u8 quad, bool ena, u8 threshold)
+{
+	int err;
+	u32 val;
+
+	err = ice_read_quad_reg_e82x(hw, quad, Q_REG_TX_MEM_GBL_CFG, &val);
+	if (err)
+		return err;
+
+	val &= ~Q_REG_TX_MEM_GBL_CFG_INTR_ENA_M;
+	if (ena) {
+		val |= Q_REG_TX_MEM_GBL_CFG_INTR_ENA_M;
+		val &= ~Q_REG_TX_MEM_GBL_CFG_INTR_THR_M;
+		val |= FIELD_PREP(Q_REG_TX_MEM_GBL_CFG_INTR_THR_M, threshold);
+	}
+
+	return ice_write_quad_reg_e82x(hw, quad, Q_REG_TX_MEM_GBL_CFG, val);
+}
+
+/**
  * ice_ptp_init_phy_e82x - initialize PHY parameters
  * @ptp: pointer to the PTP HW struct
  */
diff --git a/drivers/net/ethernet/intel/ice/ice_ptp_hw.h b/drivers/net/ethernet/intel/ice/ice_ptp_hw.h
index 6246de3bacf3..5645b20a9f87 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp_hw.h
+++ b/drivers/net/ethernet/intel/ice/ice_ptp_hw.h
@@ -265,6 +265,7 @@ int ice_stop_phy_timer_e82x(struct ice_hw *hw, u8 port, bool soft_reset);
 int ice_start_phy_timer_e82x(struct ice_hw *hw, u8 port);
 int ice_phy_cfg_tx_offset_e82x(struct ice_hw *hw, u8 port);
 int ice_phy_cfg_rx_offset_e82x(struct ice_hw *hw, u8 port);
+int ice_phy_cfg_intr_e82x(struct ice_hw *hw, u8 quad, bool ena, u8 threshold);
 
 /* E810 family functions */
 int ice_read_sma_ctrl_e810t(struct ice_hw *hw, u8 *data);
@@ -342,11 +343,8 @@ int ice_cgu_get_output_pin_state_caps(struct ice_hw *hw, u8 pin_id,
 #define Q_REG_TX_MEM_GBL_CFG		0xC08
 #define Q_REG_TX_MEM_GBL_CFG_LANE_TYPE_S	0
 #define Q_REG_TX_MEM_GBL_CFG_LANE_TYPE_M	BIT(0)
-#define Q_REG_TX_MEM_GBL_CFG_TX_TYPE_S	1
 #define Q_REG_TX_MEM_GBL_CFG_TX_TYPE_M	ICE_M(0xFF, 1)
-#define Q_REG_TX_MEM_GBL_CFG_INTR_THR_S	9
 #define Q_REG_TX_MEM_GBL_CFG_INTR_THR_M ICE_M(0x3F, 9)
-#define Q_REG_TX_MEM_GBL_CFG_INTR_ENA_S	15
 #define Q_REG_TX_MEM_GBL_CFG_INTR_ENA_M	BIT(15)
 
 /* Tx Timestamp data registers */