Pyun YongHyeon 9293eb399e Make IPMI work in the bce driver even when the interface is ... configured down. Formerly, IPMI communication was lost whenever the interface was not up. The reason was that the BCE_EMAC_MODE register was not configured with the correct media settings. There are two parts to the fix. First, resetting the chip in bce_reset() causes the BCE_EMAC_MODE register to be initialized to a default value that does not necessarily correspond to the actual media settings. The fix implemented here is a bit of a hack. Ideally, at the end of bce_reset() we would poll the PHY to determine the negotiated media, and then we would set the BCE_EMAC_MODE register accordingly. That is difficult, since the PHY is abstracted behind the MII layer and is not supposed to be queried directly from the MAC driver. Instead, we read the BCE_EMAC_MODE register at the beginning of bce_reset() and then restore its media bits to their original values before returning. If IPMI is up and running, then the link is already established and the BCE_EMAC_MODE register is already set appropriately when bce_reset() is called. If IPMI is not running, no harm is done by preserving the BCE_EMAC_MODE settings. The driver will set the register properly once the interface is configured up and link is established. Second, bce_miibus_statchg() is sometimes called when the link is down. In that case, the reported media settings are invalid. Formerly, the driver used them anyway to setup the BCE_EMAC_MODE register. We now avoid changing any MAC registers unless link is active and the reported media settings are valid. Submitted by: jdp Tested by: jdp MFC after: 5 days		2012-05-23 01:20:25 +00:00
..
if_bce.c	Make IPMI work in the bce driver even when the interface is	2012-05-23 01:20:25 +00:00
if_bcefw.h	- Updated firmware which improves small packet performance.	2011-02-11 00:41:49 +00:00
if_bcereg.h	Implement basic remote PHY support. Remote PHY allows the	2012-05-09 01:55:23 +00:00