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+.. _OPAL_NPU_SET_RELAXED_ORDER:
+
+OPAL_NPU_SET_RELAXED_ORDER
+==========================
+
+Request that relaxed memory ordering be enabled or disabled for a device.
+
+Parameters
+----------
+::
+
+	uint64_t phb_id
+	uint16_t bdfn
+	bool request_enabled
+
+``phb_id``
+	OPAL ID of the PHB
+
+``bdfn``
+	Bus-Device-Function number of the device
+
+``request_enabled``
+	Requested state of relaxed memory ordering enablement
+
+Return values
+-------------
+
+``OPAL_SUCCESS``
+	Requested state set
+
+``OPAL_PARAMETER``
+	The given phb_id or bdfn is invalid or out of range
+
+``OPAL_CONSTRAINED``
+	Relaxed ordering can not be enabled until an enable request is made
+	for every device on this PHB.
+
+``OPAL_RESOURCE``
+	No more relaxed ordering sources are available
+
+.. _OPAL_NPU_GET_RELAXED_ORDER:
+
+OPAL_NPU_GET_RELAXED_ORDER
+==========================
+
+Query the relaxed memory ordering state of a device.
+
+Parameters
+----------
+::
+
+	uint64_t phb_id
+	uint64_t bdfn
+
+``phb_id``
+	OPAL ID of the PHB
+
+``bdfn``
+	Bus-Device-Function number of the device
+
+Return values
+-------------
+
+On success, the current relaxed ordering state is returned.
+
+``OPAL_PARAMETER``
+	The given phb_id or bdfn is invalid.