- Convert hme(4) to use TX side bus_dmamap_load_mbuf_sg(9).

- Move hardware counter reading/zeroing to hme_tick(). This saves
   8 register access per interrupt. [1]
- Use imax macro for getting max. argument between two integers.
- Invoke bus_dmamap_sync(9) first before freeing mbuf.
- Check driver queue first to reduce locking operation in hme_start_locked()
  and interrupt handler.
- Simplyfy watchdog timer setup in interrupt handler.
- Don't log normal errors such as RX overrun. If we have DMA stuck
  condition, reinitialize the driver and log it.

Reviewed by:	marius
Obtained from:	OpenBSD [1]

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/dev/hme/if_hmevar.h b/sys/dev/hme/if_hmevar.h
index 25b0552..a5d50e2 100644
--- a/sys/dev/hme/if_hmevar.h
+++ b/sys/dev/hme/if_hmevar.h
@@ -100,6 +100,7 @@ struct hme_ring {
 	/* Descriptors */
 	struct hme_rxdesc	rb_rxdesc[HME_NRXDESC];
 	struct hme_txdesc	rb_txdesc[HME_NTXQ];
+	bus_dma_segment_t	rb_txsegs[HME_NTXQ];
 
 	struct	hme_txdq	rb_txfreeq;
 	struct	hme_txdq	rb_txbusyq;