K 10
svn:author
V 8
jmcneill
K 8
svn:date
V 27
2016-07-13T20:46:54.502321Z
K 7
svn:log
V 622
Allwinner Gigabit EMAC performance improvements.

 - Support DEVICE_POLLING
 - Increase TX descriptors to 1024
 - Add support for passing a chain of mbufs to if_input, reducing the
   number of calls to mtx_unlock/mtx_lock under load.
 - Remove duplicate byteswap when setting TX_INT_CTL in TX descriptor.
 - Set undocumented "TX_NEXT_FRAME" bit in TX control 1 register.
   According to the A83T BSP, setting this bit allows the DMA engine to
   operate on a packet while receiving another.

Tested on A83T (1000Mbps PHY) and H3 (100Mbps PHY).

Reviewed by:		manu
Differential Revision:	https://reviews.freebsd.org/D7031

END