Add a NetBSD-compatible mii_attach(), which is intended to eventually

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)

1 files changed, 4 insertions, 2 deletions

diff --git a/sys/dev/mii/mii.h b/sys/dev/mii/mii.h
index c84c767..b7e0a05 100644
--- a/sys/dev/mii/mii.h
+++ b/sys/dev/mii/mii.h
@@ -1,5 +1,5 @@
 /*	$NetBSD: mii.h,v 1.9 2001/05/31 03:07:14 thorpej Exp $	*/
- 
+
 /*-
  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
  *
@@ -47,7 +47,7 @@
 #define	MII_COMMAND_WRITE	0x01
 #define	MII_COMMAND_ACK		0x02
 
-#define	MII_BMCR	0x00 	/* Basic mode control register (rw) */
+#define	MII_BMCR	0x00	/* Basic mode control register (rw) */
 #define	BMCR_RESET	0x8000	/* reset */
 #define	BMCR_LOOP	0x4000	/* loopback */
 #define	BMCR_SPEED0	0x2000	/* speed selection (LSB) */
@@ -82,6 +82,8 @@
 #define	BMSR_JABBER	0x0002	/* Jabber detected */
 #define	BMSR_EXTCAP	0x0001	/* Extended capability */
 
+#define	BMSR_DEFCAPMASK	0xffffffff
+
 /*
  * Note that the EXTSTAT bit indicates that there is extended status
  * info available in register 15, but 802.3 section 22.2.4.3 also