replace mii_phy_probe() altogether. Compared to the latter the advantages
of mii_attach() are:
- intended to be called multiple times in order to attach PHYs in multiple
passes (f.e. in order to only use sub-ranges of the 0 to MII_NPHY - 1
range)
- being able to pass along the capability mask from the NIC to the PHY
drivers
- being able to specify at which address (phyloc) to probe for a PHY
(instead of always probing at all addresses from 0 to MII_NPHY - 1)
- being able to specify which PHY instance (offloc) to attach
- being able to pass along MIIF_* flags from the NIC to the PHY drivers
(f.e. as required to indicated to the PHY drivers that flow control is
supported by the NIC driver, which actually is the motivation for this
change).
While at it, I used the opportunity to get rid of some hacks in mii(4)
like miibus_probe() generally doing work besides sheer probing and the
"EVIL HACK" (which will vanish entirely along with mii_phy_probe()) by
passing the struct ifnet pointer via an argument of mii_attach() as well
as to fix some resource leaks in mii(4) in case something fails.
Commits which will update the PHY drivers to honor the MII flags passed
down from the NIC drivers and take advantage of mii_attach() to get rid
of certain types of hacks in NIC and PHY drivers as well as a conversion
of the remaining uses of mii_phy_probe() will follow shortly.
Reviewed by: jhb, yongari
Obtained from: NetBSD (partially)
a55fb8a458