Align Tx/Rx descriptors on 32 bytes boundary instead of PAGE_SIZE.

Also align setup descriptor on 32 bytes boundary. Tx buffer have no
alignment limitation so create dmamap without alignment
restriction[1]. Rx buffer still seems to require 4 bytes alignment
limitation but we can simply use MCLBYTES for size to map the
buffer instead of TULIP_DATA_PER_DESC as the buffer is allocated
with m_getcl(9).
de(4) supports up to TULIP_MAX_TXSEG segments for Tx buffers,
increase maximum dma segment size to TULIP_MAX_TXSEG * MCLBYTES.
While I'm here remove TULIP_DATA_PER_DESC as it is not used anymore.

This should fix de(4) breakage introduced after r176206.

Submitted by:	jhb [1]
Reported by:	WATANABE Kazuhiro < CQG00620 <> nifty dot ne dot jp >
Tested by:	WATANABE Kazuhiro < CQG00620 <> nifty dot ne dot jp >,
		Takahashi Yoshihiro < nyan <> jp dot freebsd dot org >

0 files changed, 0 insertions, 0 deletions