1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
index 3c314f3d8107..07ecf2a86742 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
@@ -5314,6 +5314,66 @@ int ice_read_pca9575_reg(struct ice_hw *hw, u8 offset, u8 *data)
 }
 
 /**
+ * ice_ptp_read_sdp_ac - read SDP available connections section from NVM
+ * @hw: pointer to the HW struct
+ * @entries: returns the SDP available connections section from NVM
+ * @num_entries: returns the number of valid entries
+ *
+ * Return: 0 on success, negative error code if NVM read failed or section does
+ * not exist or is corrupted
+ */
+int ice_ptp_read_sdp_ac(struct ice_hw *hw, __le16 *entries, uint *num_entries)
+{
+	__le16 data;
+	u32 offset;
+	int err;
+
+	err = ice_acquire_nvm(hw, ICE_RES_READ);
+	if (err)
+		goto exit;
+
+	/* Read the offset of SDP_AC */
+	offset = ICE_AQC_NVM_SDP_AC_PTR_OFFSET;
+	err = ice_aq_read_nvm(hw, 0, offset, sizeof(data), &data, false, true,
+			      NULL);
+	if (err)
+		goto exit;
+
+	/* Check if section exist */
+	offset = FIELD_GET(ICE_AQC_NVM_SDP_AC_PTR_M, le16_to_cpu(data));
+	if (offset == ICE_AQC_NVM_SDP_AC_PTR_INVAL) {
+		err = -EINVAL;
+		goto exit;
+	}
+
+	if (offset & ICE_AQC_NVM_SDP_AC_PTR_TYPE_M) {
+		offset &= ICE_AQC_NVM_SDP_AC_PTR_M;
+		offset *= ICE_AQC_NVM_SECTOR_UNIT;
+	} else {
+		offset *= sizeof(data);
+	}
+
+	/* Skip reading section length and read the number of valid entries */
+	offset += sizeof(data);
+	err = ice_aq_read_nvm(hw, 0, offset, sizeof(data), &data, false, true,
+			      NULL);
+	if (err)
+		goto exit;
+	*num_entries = le16_to_cpu(data);
+
+	/* Read SDP configuration section */
+	offset += sizeof(data);
+	err = ice_aq_read_nvm(hw, 0, offset, *num_entries * sizeof(data),
+			      entries, false, true, NULL);
+
+exit:
+	if (err)
+		dev_dbg(ice_hw_to_dev(hw), "Failed to configure SDP connection section\n");
+	ice_release_nvm(hw);
+	return err;
+}
+
+/**
  * ice_ptp_init_phy_e810 - initialize PHY parameters
  * @ptp: pointer to the PTP HW struct
  */