Add le(4), a driver for AMD Am7900 LANCE and Am79C9xx PCnet NICs ported

from NetBSD. This driver actually can replace lnc(4). Advantages over
lnc(4) are:
- Cleaner and more flexible regarding MD needs.
- Endian-clean and MPSAFE.
- Supports ALTQ, VLAN_MTU, ifmedia.
- Uses 32bit DMA for the PCI variants.

This commit includes front-ends for the dma(4) pseudo-bus found on SBus-
based sparc64 machines (thus supports the on-board LANCE in Sun Ultra 1)
and PCI. In order to actually replace lnc(4), the front-ends for ISA and
the PC98 CBUS would have to be added but for which I don't have hardware
to test.

Reviewed and some improvements by:	yongari
Tested on:				i386, sparc64

1 files changed, 169 insertions, 0 deletions

diff --git a/sys/dev/le/lancevar.h b/sys/dev/le/lancevar.h
new file mode 100644
index 000000000000..51149a6895dc
--- /dev/null
+++ b/sys/dev/le/lancevar.h
@@ -0,0 +1,169 @@
+/*	$NetBSD: lancevar.h,v 1.10 2005/12/11 12:21:27 christos Exp $	*/
+
+/*-
+ * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
+ * Simulation Facility, NASA Ames Research Center.
+ *
+ * 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 the NetBSD
+ *	Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+/* $FreeBSD$ */
+
+#ifndef _DEV_LE_LANCEVAR_H_
+#define	_DEV_LE_LANCEVAR_H_
+
+#define	LE_DRIVER_NAME	"le"
+
+extern devclass_t le_devclass;
+
+struct lance_softc {
+	struct ifnet	*sc_ifp;
+	struct ifmedia	sc_media;
+	struct mtx	sc_mtx;
+
+	/*
+	 * Memory functions:
+	 *
+	 *	copy to/from descriptor
+	 *	copy to/from buffer
+	 *	zero bytes in buffer
+	 */
+	void	(*sc_copytodesc)(struct lance_softc *, void *, int, int);
+	void	(*sc_copyfromdesc)(struct lance_softc *, void *, int, int);
+	void	(*sc_copytobuf)(struct lance_softc *, void *, int, int);
+	void	(*sc_copyfrombuf)(struct lance_softc *, void *, int, int);
+	void	(*sc_zerobuf)(struct lance_softc *, int, int);
+
+	/*
+	 * Machine-dependent functions:
+	 *
+	 *	read/write CSR
+	 *	hardware reset hook - may be NULL
+	 *	hardware init hook - may be NULL
+	 *	no carrier hook - may be NULL
+	 *	media change hook - may be NULL
+	 */
+	uint16_t	(*sc_rdcsr)(struct lance_softc *, uint16_t);
+	void	(*sc_wrcsr)(struct lance_softc *, uint16_t, uint16_t);
+	void	(*sc_hwreset)(struct lance_softc *);
+	void	(*sc_hwinit)(struct lance_softc *);
+	int	(*sc_hwintr)(struct lance_softc *);
+	void	(*sc_nocarrier)(struct lance_softc *);
+	int	(*sc_mediachange)(struct lance_softc *);
+	void	(*sc_mediastatus)(struct lance_softc *, struct ifmediareq *);
+
+	/*
+	 * Media-supported by this interface.  If this is NULL,
+	 * the only supported media is assumed to be "manual".
+	 */
+	const int	*sc_supmedia;
+	int	sc_nsupmedia;
+	int	sc_defaultmedia;
+
+	uint16_t	sc_conf3;	/* CSR3 value */
+
+	void	*sc_mem;	/* base address of RAM -- CPU's view */
+	u_long	sc_addr;	/* base address of RAM -- LANCE's view */
+
+	u_long	sc_memsize;	/* size of RAM */
+
+	int	sc_nrbuf;	/* number of receive buffers */
+	int	sc_ntbuf;	/* number of transmit buffers */
+	int	sc_last_rd;
+	int	sc_first_td;
+	int	sc_last_td;
+	int	sc_no_td;
+
+	int	sc_initaddr;
+	int	sc_rmdaddr;
+	int	sc_tmdaddr;
+	int	sc_rbufaddr;
+	int	sc_tbufaddr;
+
+	uint8_t	sc_enaddr[ETHER_ADDR_LEN];
+
+	void	(*sc_meminit)(struct lance_softc *);
+	void	(*sc_start_locked)(struct lance_softc *);
+
+	int	sc_flags;
+#define	LE_ALLMULTI	(1 << 0)
+#define	LE_BSWAP	(1 << 1)
+#define	LE_CARRIER	(1 << 2)
+#define	LE_DEBUG	(1 << 3)
+#define	LE_PROMISC	(1 << 4)
+};
+
+#define	LE_LOCK_INIT(_sc, _name)					\
+	mtx_init(&(_sc)->sc_mtx, _name, MTX_NETWORK_LOCK, MTX_DEF)
+#define	LE_LOCK_INITIALIZED(_sc)	mtx_initialized(&(_sc)->sc_mtx)
+#define	LE_LOCK(_sc)			mtx_lock(&(_sc)->sc_mtx)
+#define	LE_UNLOCK(_sc)			mtx_unlock(&(_sc)->sc_mtx)
+#define	LE_LOCK_ASSERT(_sc, _what)	mtx_assert(&(_sc)->sc_mtx, (_what))
+#define	LE_LOCK_DESTROY(_sc)		mtx_destroy(&(_sc)->sc_mtx)
+
+#define	LE_HTOLE16(v)	(((sc)->sc_flags & LE_BSWAP) ? htole16(v) : (v))
+#define	LE_HTOLE32(v)	(((sc)->sc_flags & LE_BSWAP) ? htole32(v) : (v))
+#define	LE_LE16TOH(v)	(((sc)->sc_flags & LE_BSWAP) ? le16toh(v) : (v))
+#define	LE_LE32TOH(v)	(((sc)->sc_flags & LE_BSWAP) ? le32toh(v) : (v))
+
+int lance_config(struct lance_softc *, const char*, int);
+void lance_attach(struct lance_softc *);
+void lance_detach(struct lance_softc *);
+void lance_suspend(struct lance_softc *);
+void lance_resume(struct lance_softc *);
+void lance_init_locked(struct lance_softc *);
+int lance_put(struct lance_softc *, int, struct mbuf *);
+void lance_read(struct lance_softc *, int, int);
+void lance_setladrf(struct lance_softc *, u_int16_t *);
+
+/*
+ * The following functions are only useful on certain CPU/bus
+ * combinations.  They should be written in assembly language for
+ * maximum efficiency, but machine-independent versions are provided
+ * for drivers that have not yet been optimized.
+ */
+void lance_copytobuf_contig(struct lance_softc *, void *, int, int);
+void lance_copyfrombuf_contig(struct lance_softc *, void *, int, int);
+void lance_zerobuf_contig(struct lance_softc *, int, int);
+
+#if 0	/* Example only - see lance.c */
+void lance_copytobuf_gap2(struct lance_softc *, void *, int, int);
+void lance_copyfrombuf_gap2(struct lance_softc *, void *, int, int);
+void lance_zerobuf_gap2(struct lance_softc *, int, int);
+
+void lance_copytobuf_gap16(struct lance_softc *, void *, int, int);
+void lance_copyfrombuf_gap16(struct lance_softc *, void *, int, int);
+void lance_zerobuf_gap16(struct lance_softc *, int, int);
+#endif /* Example only */
+
+#endif /* _DEV_LE_LANCEVAR_H_ */