Backend support for if_media interface ioctl's. This is for supporting

the many-mode, many-media-option type ethernet cards, in particular, the
new if_de.

Obtained from: NetBSD  (Their implementation of BSDI's design)

2 files changed, 781 insertions, 0 deletions

diff --git a/sys/net/if_media.c b/sys/net/if_media.c
new file mode 100644
index 0000000..1dcf18f
--- /dev/null
+++ b/sys/net/if_media.c
@@ -0,0 +1,475 @@
+/*	$NetBSD: if_media.c,v 1.1 1997/03/17 02:55:15 thorpej Exp $	*/
+
+/*
+ * Copyright (c) 1997
+ *	Jonathan Stone and Jason R. Thorpe.  All rights reserved.
+ *
+ * This software is derived from information provided by Matt Thomas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Jonathan Stone
+ *	and Jason R. Thorpe for the NetBSD Project.
+ * 4. The names of the authors may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * BSD/OS-compatible network interface media selection.
+ *
+ * Where it is safe to do so, this code strays slightly from the BSD/OS
+ * design.  Software which uses the API (device drivers, basically)
+ * shouldn't notice any difference.
+ *
+ * Many thanks to Matt Thomas for providing the information necessary
+ * to implement this interface.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/errno.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/malloc.h>
+
+#include <net/if.h>
+#include <net/if_media.h>
+#include <net/netisr.h>
+
+/*
+ * Compile-time options:
+ * IFMEDIA_DEBUG:
+ *	turn on implementation-level debug printfs.
+ * 	Useful for debugging newly-ported  drivers.
+ */
+
+struct ifmedia_entry *ifmedia_match __P((struct ifmedia *ifm,
+    int flags, int mask));
+
+#ifdef IFMEDIA_DEBUG
+int	ifmedia_debug = 0;
+static	void ifmedia_printword __P((int));
+#endif
+
+/*
+ * Initialize if_media struct for a specific interface instance.
+ */
+void
+ifmedia_init(ifm, dontcare_mask, change_callback, status_callback)
+	struct ifmedia *ifm;
+	int dontcare_mask;
+	ifm_change_cb_t change_callback;
+	ifm_stat_cb_t status_callback;
+{
+
+	LIST_INIT(&ifm->ifm_list);
+	ifm->ifm_cur = NULL;
+	ifm->ifm_media = 0;
+	ifm->ifm_mask = dontcare_mask;		/* IF don't-care bits */
+	ifm->ifm_change = change_callback;
+	ifm->ifm_status = status_callback;
+}
+
+/*
+ * Add a media configuration to the list of supported media
+ * for a specific interface instance.
+ */
+void
+ifmedia_add(ifm, mword, data, aux)
+	struct ifmedia *ifm;
+	int mword;
+	int data;
+	void *aux;
+{
+	register struct ifmedia_entry *entry;
+
+#ifdef IFMEDIA_DEBUG
+	if (ifmedia_debug) {
+		if (ifm == NULL) {
+			printf("ifmedia_add: null ifm\n");
+			return;
+		}
+		printf("Adding entry for ");
+		ifmedia_printword(mword);
+	}
+#endif
+
+	entry = malloc(sizeof(*entry), M_IFADDR, M_NOWAIT);
+	if (entry == NULL)
+		panic("ifmedia_add: can't malloc entry");
+
+	entry->ifm_media = mword;
+	entry->ifm_data = data;
+	entry->ifm_aux = aux;
+
+	LIST_INSERT_HEAD(&ifm->ifm_list, entry, ifm_list);
+}
+
+/*
+ * Add an array of media configurations to the list of
+ * supported media for a specific interface instance.
+ */
+void
+ifmedia_list_add(ifm, lp, count)
+	struct ifmedia *ifm;
+	struct ifmedia_entry *lp;
+	int count;
+{
+	int i;
+
+	for (i = 0; i < count; i++)
+		ifmedia_add(ifm, lp[i].ifm_media, lp[i].ifm_data,
+		    lp[i].ifm_aux);
+}
+
+/*
+ * Set the default active media. 
+ *
+ * Called by device-specific code which is assumed to have already
+ * selected the default media in hardware.  We do _not_ call the
+ * media-change callback.
+ */
+void
+ifmedia_set(ifm, target)
+	struct ifmedia *ifm; 
+	int target;
+
+{
+	struct ifmedia_entry *match;
+
+	match = ifmedia_match(ifm, target, ifm->ifm_mask);
+
+	if (match == NULL) {
+		printf("ifmedia_set: no match for 0x%x/0x%x\n",
+		    target, ~ifm->ifm_mask);
+		panic("ifmedia_set");
+	}
+	ifm->ifm_cur = match;
+
+#ifdef IFMEDIA_DEBUG
+	if (ifmedia_debug) {
+		printf("ifmedia_set: target ");
+		ifmedia_printword(target);
+		printf("ifmedia_set: setting to ");
+		ifmedia_printword(ifm->ifm_cur->ifm_media);
+	}
+#endif
+}
+
+/*
+ * Device-independent media ioctl support function.
+ */
+int
+ifmedia_ioctl(ifp, ifr, ifm, cmd)
+	struct ifnet *ifp;
+	struct ifreq *ifr;
+	struct ifmedia *ifm;
+	u_long cmd;
+{
+	struct ifmedia_entry *match;
+	struct ifmediareq *ifmr = (struct ifmediareq *) ifr;
+	int error = 0, sticky;
+
+	if (ifp == NULL || ifr == NULL || ifm == NULL)
+		return(EINVAL);
+
+	switch (cmd) {
+
+	/*
+	 * Set the current media.
+	 */
+	case  SIOCSIFMEDIA:
+	{
+		struct ifmedia_entry *oldentry;
+		int oldmedia;
+		int newmedia = ifr->ifr_media;
+
+		match = ifmedia_match(ifm, newmedia, ifm->ifm_mask);
+		if (match == NULL) {
+#ifdef IFMEDIA_DEBUG
+			if (ifmedia_debug) {
+				printf(
+				    "ifmedia_ioctl: no media found for 0x%x\n", 
+				    newmedia);
+			}
+#endif
+			return (ENXIO);
+		}
+
+		/*
+		 * If no change, we're done.
+		 * XXX Automedia may invole software intervention.
+		 *     Keep going in case the the connected media changed.
+		 *     Similarly, if best match changed (kernel debugger?).
+		 */
+		if ((IFM_SUBTYPE(newmedia) != IFM_AUTO) &&
+		    (newmedia == ifm->ifm_media) &&
+		    (match == ifm->ifm_cur))
+			return 0;
+
+		/*
+		 * We found a match, now make the driver switch to it.
+		 * Make sure to preserve our old media type in case the
+		 * driver can't switch.
+		 */
+#ifdef IFMEDIA_DEBUG
+		if (ifmedia_debug) {
+			printf("ifmedia_ioctl: switching %s to ",
+			    ifp->if_xname);
+			ifmedia_printword(match->ifm_media);
+		}
+#endif
+		oldentry = ifm->ifm_cur;
+		oldmedia = ifm->ifm_media;
+		ifm->ifm_cur = match;
+		ifm->ifm_media = newmedia;
+		error = (*ifm->ifm_change)(ifp);
+		if (error) {
+			ifm->ifm_cur = oldentry;
+			ifm->ifm_media = oldmedia;
+		}
+		break;
+	}
+
+	/*
+	 * Get list of available media and current media on interface.
+	 */
+	case  SIOCGIFMEDIA: 
+	{
+		struct ifmedia_entry *ep;
+		int *kptr, count;
+
+		kptr = NULL;		/* XXX gcc */
+
+		ifmr->ifm_active = ifmr->ifm_current = ifm->ifm_cur ?
+		    ifm->ifm_cur->ifm_media : IFM_NONE;
+		ifmr->ifm_mask = ifm->ifm_mask;
+		ifmr->ifm_status = 0;
+		(*ifm->ifm_status)(ifp, ifmr);
+
+		count = 0;
+		ep = ifm->ifm_list.lh_first;
+
+		if (ifmr->ifm_count != 0) {
+			kptr = (int *)malloc(ifmr->ifm_count * sizeof(int),
+			    M_TEMP, M_WAITOK);
+
+			/*
+			 * Get the media words from the interface's list.
+			 */
+			for (; ep != NULL && count < ifmr->ifm_count;
+			    ep = ep->ifm_list.le_next, count++)
+				kptr[count] = ep->ifm_media;
+
+			if (ep != NULL)
+				error = E2BIG;	/* oops! */
+		}
+
+		/*
+		 * If there are more interfaces on the list, count
+		 * them.  This allows the caller to set ifmr->ifm_count
+		 * to 0 on the first call to know how much space to
+		 * callocate.
+		 */
+		for (; ep != NULL; ep = ep->ifm_list.le_next)
+			count++;
+
+		/*
+		 * We do the copyout on E2BIG, because that's
+		 * just our way of telling userland that there
+		 * are more.  This is the behavior I've observed
+		 * under BSD/OS 3.0
+		 */
+		sticky = error;
+		if ((error == 0 || error == E2BIG) && ifmr->ifm_count != 0) {
+			error = copyout((caddr_t)kptr,
+			    (caddr_t)ifmr->ifm_ulist,
+			    ifmr->ifm_count * sizeof(int));
+		}
+
+		if (error == 0)
+			error = sticky;
+
+		if (ifmr->ifm_count != 0)
+			free(kptr, M_TEMP);
+
+		ifmr->ifm_count = count;
+		break;
+	}
+
+	default:
+		return (EINVAL);
+	}
+
+	return (error);
+}
+
+/*
+ * Find media entry matching a given ifm word.
+ *
+ */
+struct ifmedia_entry *
+ifmedia_match(ifm, target, mask)
+	struct ifmedia *ifm; 
+	int target;
+	int mask;
+{
+	struct ifmedia_entry *match, *next;
+
+	match = NULL;
+	mask = ~mask;
+
+	for (next = ifm->ifm_list.lh_first; next != NULL;
+	    next = next->ifm_list.le_next) {
+		if ((next->ifm_media & mask) == (target & mask)) {
+#if defined(IFMEDIA_DEBUG) || defined(DIAGNOSTIC)
+			if (match) {
+				printf("ifmedia_match: multiple match for "
+				    "0x%x/0x%x\n", target, mask);
+			}
+#endif
+			match = next;
+		}
+	}
+
+	return match;
+}
+
+#ifdef IFMEDIA_DEBUG
+struct ifmedia_description ifm_type_descriptions[] =
+    IFM_TYPE_DESCRIPTIONS;
+
+struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
+    IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
+
+struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
+    IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
+
+struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
+    IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
+
+struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
+    IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
+
+struct ifmedia_description ifm_subtype_fddi_descriptions[] =
+    IFM_SUBTYPE_FDDI_DESCRIPTIONS;
+
+struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
+    IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
+
+struct ifmedia_description ifm_subtype_shared_descriptions[] =
+    IFM_SUBTYPE_SHARED_DESCRIPTIONS;
+
+struct ifmedia_description ifm_shared_option_descriptions[] =
+    IFM_SHARED_OPTION_DESCRIPTIONS;
+
+struct ifmedia_type_to_subtype {
+	struct ifmedia_description *subtypes;
+	struct ifmedia_description *options;
+};
+
+/* must be in the same order as IFM_TYPE_DESCRIPTIONS */
+struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
+	{
+	  &ifm_subtype_ethernet_descriptions[0],
+	  &ifm_subtype_ethernet_option_descriptions[0]
+	},
+	{
+	  &ifm_subtype_tokenring_descriptions[0],
+	  &ifm_subtype_tokenring_option_descriptions[0]
+	},
+	{
+	  &ifm_subtype_fddi_descriptions[0],
+	  &ifm_subtype_fddi_option_descriptions[0]
+	},
+};
+
+/*
+ * print a media word.
+ */
+static void
+ifmedia_printword(ifmw)
+	int ifmw;
+{
+	struct ifmedia_description *desc;
+	struct ifmedia_type_to_subtype *ttos;
+	int seen_option = 0;
+
+	/* Find the top-level interface type. */
+	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
+	    desc->ifmt_string != NULL; desc++, ttos++)
+		if (IFM_TYPE(ifmw) == desc->ifmt_word)
+			break;
+	if (desc->ifmt_string == NULL) {
+		printf("<unknown type>\n");
+		return;
+	}
+	printf(desc->ifmt_string);
+
+	/*
+	 * Check for the shared subtype descriptions first, then the
+	 * type-specific ones.
+	 */
+	for (desc = ifm_subtype_shared_descriptions;
+	    desc->ifmt_string != NULL; desc++)
+		if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
+			goto got_subtype;
+
+	for (desc = ttos->subtypes; desc->ifmt_string != NULL; desc++)
+		if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
+			break;
+	if (desc->ifmt_string == NULL) {
+		printf(" <unknown subtype>\n");
+		return;
+	}
+
+ got_subtype:
+	printf(" %s", desc->ifmt_string);
+
+	/*
+	 * Look for shared options.
+	 */
+	for (desc = ifm_shared_option_descriptions;
+	    desc->ifmt_string != NULL; desc++) {
+		if (ifmw & desc->ifmt_word) {
+			if (seen_option == 0)
+				printf(" <");
+			printf("%s%s", seen_option++ ? "," : "",
+			    desc->ifmt_string);
+		}
+	}
+
+	/*
+	 * Look for subtype-specific options.
+	 */
+	for (desc = ttos->options; desc->ifmt_string != NULL; desc++) {
+		if (ifmw & desc->ifmt_word) {
+			if (seen_option == 0)
+				printf(" <");
+			printf("%s%s", seen_option++ ? "," : "",
+			    desc->ifmt_string); 
+		}
+	}
+	printf("%s\n", seen_option ? ">" : "");
+}
+#endif /* IFMEDIA_DEBUG */
diff --git a/sys/net/if_media.h b/sys/net/if_media.h
new file mode 100644
index 0000000..08d0561
--- /dev/null
+++ b/sys/net/if_media.h
@@ -0,0 +1,306 @@
+/*	$NetBSD: if_media.h,v 1.3 1997/03/26 01:19:27 thorpej Exp $	*/
+
+/*
+ * Copyright (c) 1997
+ *	Jonathan Stone and Jason R. Thorpe.  All rights reserved.
+ *
+ * This software is derived from information provided by Matt Thomas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Jonathan Stone
+ *	and Jason R. Thorpe for the NetBSD Project.
+ * 4. The names of the authors may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _NET_IF_MEDIA_H_
+#define _NET_IF_MEDIA_H_
+
+/*
+ * Prototypes and definitions for BSD/OS-compatible network interface
+ * media selection.
+ *
+ * Where it is safe to do so, this code strays slightly from the BSD/OS
+ * design.  Software which uses the API (device drivers, basically)
+ * shouldn't notice any difference.
+ *
+ * Many thanks to Matt Thomas for providing the information necessary
+ * to implement this interface.
+ */
+
+#ifdef _KERNEL
+
+#include <sys/queue.h>
+
+/*
+ * Driver callbacks for media status and change requests.
+ */
+typedef	int (*ifm_change_cb_t) __P((struct ifnet *ifp));
+typedef	void (*ifm_stat_cb_t) __P((struct ifnet *ifp, struct ifmediareq *req));
+
+/*
+ * In-kernel representation of a single supported media type.
+ */
+struct ifmedia_entry {
+	LIST_ENTRY(ifmedia_entry) ifm_list;
+	int	ifm_media;	/* description of this media attachment */
+	int	ifm_data;	/* for driver-specific use */
+	void	*ifm_aux;	/* for driver-specific use */
+};
+
+/*
+ * One of these goes into a network interface's softc structure.
+ * It is used to keep general media state.
+ */
+struct ifmedia {
+	int	ifm_mask;	/* mask of changes we don't care about */
+	int	ifm_media;	/* current user-set media word */
+	struct ifmedia_entry *ifm_cur;	/* currently selected media */
+	LIST_HEAD(, ifmedia_entry) ifm_list; /* list of all supported media */
+	ifm_change_cb_t	ifm_change;	/* media change driver callback */
+	ifm_stat_cb_t	ifm_status;	/* media status driver callback */
+};
+
+/* Initialize an interface's struct if_media field. */
+void	ifmedia_init __P((struct ifmedia *ifm, int dontcare_mask,
+	    ifm_change_cb_t change_callback, ifm_stat_cb_t status_callback));
+
+/* Add one supported medium to a struct ifmedia. */
+void	ifmedia_add __P((struct ifmedia *ifm, int mword, int data, void *aux));
+
+/* Add an array (of ifmedia_entry) media to a struct ifmedia. */
+void	ifmedia_list_add(struct ifmedia *mp, struct ifmedia_entry *lp,
+	    int count);
+
+/* Set default media type on initialization. */
+void	ifmedia_set __P((struct ifmedia *ifm, int mword));
+
+/* Common ioctl function for getting/setting media, called by driver. */
+int	ifmedia_ioctl __P((struct ifnet *ifp, struct ifreq *ifr,
+	    struct ifmedia *ifm, u_long cmd));
+
+#endif /*_KERNEL */
+
+/*
+ * if_media Options word:
+ *	Bits	Use
+ *	----	-------
+ *	0-3	Media variant
+ *	4	RFU
+ *	5-7	Media type
+ *	8-15	Type specific options
+ *	16-19	RFU
+ *	20-27	Shared (global) options
+ *	28-31	Instance
+ */
+
+/*
+ * Ethernet
+ */
+#define IFM_ETHER	0x00000020
+#define	IFM_10_T	3		/* 10BaseT - RJ45 */
+#define	IFM_10_2	4		/* 10Base2 - Thinnet */
+#define	IFM_10_5	5		/* 10Base5 - AUI */
+#define	IFM_100_TX	6		/* 100BaseTX - RJ45 */
+#define	IFM_100_FX	7		/* 100BaseFX - Fiber */
+#define	IFM_100_T4	8		/* 100BaseT4 - 4 pair cat 3 */
+#define	IFM_100_VG	9		/* 100VG-AnyLAN */
+#define	IFM_100_T2	10		/* 100BaseT2 */
+
+/*
+ * Token ring
+ */
+#define	IFM_TOKEN	0x00000040
+#define	IFM_TOK_STP4	3		/* Shielded twisted pair 4m - DB9 */
+#define	IFM_TOK_STP16	4		/* Shielded twisted pair 16m - DB9 */
+#define	IFM_TOK_UTP4	5		/* Unshielded twisted pair 4m - RJ45 */
+#define	IFM_TOK_UTP16	6		/* Unshielded twisted pair 16m - RJ45 */
+#define	IFM_TOK_ETR	0x00000200	/* Early token release */
+#define	IFM_TOK_SRCRT	0x00000400	/* Enable source routing features */
+#define	IFM_TOK_ALLR	0x00000800	/* All routes / Single route bcast */
+
+/*
+ * FDDI
+ */
+#define	IFM_FDDI	0x00000060
+#define	IFM_FDDI_SMF	3		/* Single-mode fiber */
+#define	IFM_FDDI_MMF	4		/* Multi-mode fiber */
+#define IFM_FDDI_UTP	5		/* CDDI / UTP */
+#define IFM_FDDI_DA	0x00000100	/* Dual attach / single attach */
+
+/*
+ * Shared media sub-types
+ */
+#define	IFM_AUTO	0		/* Autoselect best media */
+#define	IFM_MANUAL	1		/* Jumper/dipswitch selects media */
+#define	IFM_NONE	2		/* Deselect all media */
+
+/*
+ * Shared options
+ */
+#define IFM_FDX		0x00100000	/* Force full duplex */
+#define	IFM_HDX		0x00200000	/* Force half duplex */
+#define IFM_FLAG0	0x01000000	/* Driver defined flag */
+#define IFM_FLAG1	0x02000000	/* Driver defined flag */
+#define IFM_FLAG2	0x04000000	/* Driver defined flag */
+#define	IFM_LOOP	0x08000000	/* Put hardware in loopback */
+
+/*
+ * Masks
+ */
+#define	IFM_NMASK	0x000000e0	/* Network type */
+#define	IFM_TMASK	0x0000000f	/* Media sub-type */
+#define	IFM_IMASK	0xf0000000	/* Instance */
+#define	IFM_ISHIFT	28		/* Instance shift */
+#define	IFM_OMASK	0x0000ff00	/* Type specific options */
+#define	IFM_GMASK	0x0ff00000	/* Global options */
+
+/*
+ * Status bits
+ */
+#define	IFM_AVALID	0x00000001	/* Active bit valid */
+#define	IFM_ACTIVE	0x00000002	/* Interface attached to working net */
+
+/*
+ * Macros to extract various bits of information from the media word.
+ */
+#define	IFM_TYPE(x)	((x) & IFM_NMASK)
+#define	IFM_SUBTYPE(x)	((x) & IFM_TMASK)
+#define	IFM_INST(x)	(((x) & IFM_IMASK) >> IFM_ISHIFT)
+
+/*
+ * NetBSD extension not defined in the BSDI API.  This is used in various
+ * places to get the canonical description for a given type/subtype.
+ *
+ * NOTE: all but the top-level type descriptions must contain NO whitespace!
+ * Otherwise, parsing these in ifconfig(8) would be a nightmare.
+ */
+struct ifmedia_description {
+	int	ifmt_word;		/* word value; may be masked */
+	const char *ifmt_string;	/* description */
+};
+
+#define	IFM_TYPE_DESCRIPTIONS {						\
+	{ IFM_ETHER,	"Ethernet" },					\
+	{ IFM_TOKEN,	"Token ring" },					\
+	{ IFM_FDDI,	"FDDI" },					\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_ETHERNET_DESCRIPTIONS {				\
+	{ IFM_10_T,	"10baseT/UTP" },				\
+	{ IFM_10_2,	"10base2/BNC" },				\
+	{ IFM_10_5,	"10base5/AUI" },				\
+	{ IFM_100_TX,	"100baseTX" },					\
+	{ IFM_100_FX,	"100baseFX" },					\
+	{ IFM_100_T4,	"100baseT4" },					\
+	{ IFM_100_VG,	"100baseVG" },					\
+	{ IFM_100_T2,	"100baseT2" },					\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_ETHERNET_ALIASES {					\
+	{ IFM_10_T,	"UTP" },					\
+	{ IFM_10_T,	"10UTP" },					\
+	{ IFM_10_2,	"BNC" },					\
+	{ IFM_10_2,	"10BNC" },					\
+	{ IFM_10_5,	"AUI" },					\
+	{ IFM_10_5,	"10AUI" },					\
+	{ IFM_100_TX,	"100TX" },					\
+	{ IFM_100_FX,	"100FX" },					\
+	{ IFM_100_T4,	"100T4" },					\
+	{ IFM_100_VG,	"100VG" },					\
+	{ IFM_100_T2,	"100T2" },					\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS {			\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_TOKENRING_DESCRIPTIONS {				\
+	{ IFM_TOK_STP4,	"DB9/4Mbit" },					\
+	{ IFM_TOK_STP16, "DB9/16Mbit" },				\
+	{ IFM_TOK_UTP4,	"UTP/4Mbit" },					\
+	{ IFM_TOK_UTP16, "UTP/16Mbit" },				\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_TOKENRING_ALIASES {					\
+	{ IFM_TOK_STP4,	"4STP" },					\
+	{ IFM_TOK_STP16, "16STP" },					\
+	{ IFM_TOK_UTP4,	"4UTP" },					\
+	{ IFM_TOK_UTP16, "16UTP" },					\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS {			\
+	{ IFM_TOK_ETR,	"EarlyTokenRelease" },				\
+	{ IFM_TOK_SRCRT, "SourceRouting" },				\
+	{ IFM_TOK_ALLR,	"AllRoutes" },					\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_FDDI_DESCRIPTIONS {					\
+	{ IFM_FDDI_SMF, "Single-mode" },				\
+	{ IFM_FDDI_MMF, "Multi-mode" },					\
+	{ IFM_FDDI_UTP, "UTP" },					\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_FDDI_ALIASES {					\
+	{ IFM_FDDI_SMF,	"SMF" },					\
+	{ IFM_FDDI_MMF,	"MMF" },					\
+	{ IFM_FDDI_UTP,	"CDDI" },					\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS {				\
+	{ IFM_FDDI_DA, "Dual-attach" },					\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_SHARED_DESCRIPTIONS {				\
+	{ IFM_AUTO,	"autoselect" },					\
+	{ IFM_MANUAL,	"manual" },					\
+	{ IFM_NONE,	"none" },					\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SUBTYPE_SHARED_ALIASES {					\
+	{ IFM_AUTO,	"auto" },					\
+	{ 0, NULL },							\
+}
+
+#define	IFM_SHARED_OPTION_DESCRIPTIONS {				\
+	{ IFM_FDX,	"full-duplex" },				\
+	{ IFM_HDX,	"half-duplex" },				\
+	{ IFM_FLAG0,	"flag0" },					\
+	{ IFM_FLAG1,	"flag1" },					\
+	{ IFM_FLAG2,	"flag2" },					\
+	{ IFM_LOOP,	"hw-loopback" },				\
+	{ 0, NULL },							\
+}
+
+#endif	/* _NET_IF_MEDIA_H_ */