Sean Bruno b834dcea9a 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
2016-01-07 16:42:48 +00:00
..
2015-12-25 14:51:36 +00:00