gsip(4) transmit ring priority levels

[Andy Pyles <ajpyles%cs.wm.edu@localhost>]

While looking through sys/dev/pci/if_sip.c I did not see any support for the
transmit ring priority queues that are present in the hardware
( according to this: http://www.national.com/profile/snip.cgi/openDS=DP83820 )

The RX/TX registers have been defined, but don't appear to be utilized.
For instance:
if_sipreg.h:184-192 defines these registers:
#define CR_RXPRI3       0x00010000      /* Rx priority queue select */
#define CR_RXPRI2       0x00008000      /* Rx priority queue select */
#define CR_RXPRI1       0x00004000      /* Rx priority queue select */
#define CR_RXPRI0       0x00002000      /* Rx priority queue select */
#define CR_TXPRI3       0x00001000      /* Tx priority queue select */
#define CR_TXPRI2       0x00000800      /* Tx priority queue select */
#define CR_TXPRI1       0x00000400      /* Tx priority queue select */
#define CR_TXPRI0       0x00000200      /* Tx priority queue select *

Are there any drivers that support this feature?

Thanks,
Andy