31:30

0h

RO/V

WQ State (STATE)

00: WQ is Disabled. Descriptors are not accepted into the WQ. (ENQ operations to this WQ return Retry. Other write operations are ignored.)
01: WQ is Enabled. Descriptors may be submitted and processed.
10: Disable WQ, Reset WQ, Disable Device, or Reset Device command is in progress. Descriptors are not accepted into the WQ. Descriptors currently in the WQ are being drained.
11: Unused.

29

0h

RO/V

WQ Mode Support (MODE)

When the Configuration Support field in GENCAP is 0, this field indicates whether certain WQ configuration fields are read-only. See the table in #341204 for the meaning of this field. When the Configuration Support field in GENCAP is 1, this field is unused.

28:17

0h

RO

Reserved

16

0h

RW/1C/V

WQ Occupancy Interrupt Generated (OCCINTGEN)

0: There are no WQ Occupancy Interrupts for this WQ that have not been acknowledged by software. Device is able to generate a WQ Occupancy Interrupt if the conditions are satisfied.
1: WQ Occupancy Interrupt was generated. Software should write a 1 to clear this bit. This bit must be cleared before another WQ Occupancy Interrupt can be generated for this WQ.

15:0

0h

RO/V

WQ Occupancy (OCC)

The number of entries currently in this WQ. This number may change whenever descriptors are submitted to or dispatched from the queue, so it cannot be relied on to determine whether there is space in the WQ.If the WQ Occupancy Support field in WQCAP is 0, the value in this field is undefined.