K 10
svn:author
V 6
sbruno
K 8
svn:date
V 27
2016-01-07T16:42:48.289118Z
K 7
svn:log
V 545
Switch em(4) to the extended RX descriptor format.  This matches the
e1000/e1000e split in linux.

Split rxbuffer and txbuffer apart to support the new RX descriptor format
structures. Move rxbuffer manipulation to em_setup_rxdesc() to unify the
new behavior changes.

Add a RSSKEYLEN macro for help in generating the RSSKEY data structures
in the card.

Change em_receive_checksum() to process the new rxdescriptor format
status bit.

MFC after:	2 weeks
Sponsored by:	Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D3447

END