Add a driver for the Sun HME PCI/SBus ethernet adaptor, which is onboard

in most machines of the Sun Ultra series. This is a port of the NetBSD
driver which I enhanced to make use of the gather functionality and the
configurable RX buffer offset to avoid copying all received/sent packet
(instead, packets will be directly DMAd from mbuf chains and into mbuf
clusters now).

1 files changed, 152 insertions, 0 deletions

diff --git a/sys/dev/hme/if_hmevar.h b/sys/dev/hme/if_hmevar.h
new file mode 100644
index 0000000..13bf90c
--- /dev/null
+++ b/sys/dev/hme/if_hmevar.h
@@ -0,0 +1,152 @@
+/*-
+ * Copyright (c) 1999 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Paul Kranenburg.
+ *
+ * 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.
+ *
+ *	from: NetBSD: hmevar.h,v 1.5 2000/06/25 01:10:04 eeh Exp
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/callout.h>
+
+/*
+ * Number of receive and transmit descriptors. For each receive descriptor,
+ * an mbuf cluster is allocated and set up to receive a packet, and a dma map
+ * is created. Therefore, this number should not be too high to not waste
+ * memory.
+ * TX descriptors have less static cost (a dma map is allocated which could
+ * cause bounce buffers to be reserved; other that that, the only required
+ * memory is sizeof(struct hme_txdesc)).
+ * Both must be a multiple of 16, and <= 128.
+ */
+#define HME_NRXDESC	32
+#define HME_NTXDESC	64
+
+/* Maximum size of a mapped RX buffer. */
+#define	HME_BUFSZ	1600
+
+/*
+ * RX DMA descriptor. The descriptors are preallocated; the dma map is
+ * reused.
+ */
+struct hme_rxdesc {
+	struct mbuf	*hrx_m;
+	bus_dmamap_t	hrx_dmamap;
+	int		hrx_offs;
+	bus_size_t	hrx_len;
+};
+
+struct hme_txdesc {
+	struct mbuf	*htx_m;
+	bus_dmamap_t	htx_dmamap;
+	int		htx_flags;
+};
+
+/* Value for htx_flags */
+#define	HTXF_MAPPED	1
+
+struct hme_ring {
+	/* Ring Descriptors */
+	caddr_t		rb_membase;	/* Packet buffer: CPU address */
+	bus_addr_t	rb_dmabase;	/* Packet buffer: DMA address */
+	caddr_t		rb_txd;		/* Transmit descriptors */
+	bus_addr_t	rb_txddma;	/* DMA address of same */
+	caddr_t		rb_rxd;		/* Receive descriptors */
+	bus_addr_t	rb_rxddma;	/* DMA address of same */
+
+	/* Ring Descriptor state */
+	int	rb_tdhead, rb_tdtail;
+	int	rb_rdtail;
+	int	rb_td_nbusy;
+
+	/* Descriptors */
+	struct hme_rxdesc rb_rxdesc[HME_NRXDESC];
+	struct hme_txdesc rb_txdesc[HME_NTXDESC];
+
+	bus_dmamap_t	rb_spare_dmamap;
+};
+
+struct hme_softc {
+	struct arpcom	sc_arpcom;
+	struct ifmedia	sc_ifmedia;
+	device_t	sc_dev;
+	device_t	sc_miibus;
+	struct mii_data	*sc_mii;	/* MII media control */
+	struct callout	sc_tick_ch;	/* tick callout */
+
+	/* The following bus handles are to be provided by the bus front-end */
+	bus_dma_tag_t	sc_pdmatag;	/* bus dma parent tag */
+	bus_dma_tag_t	sc_cdmatag;	/* control bus dma tag */
+	bus_dmamap_t	sc_cdmamap;	/* control bus dma handle */
+	bus_dma_tag_t	sc_rdmatag;	/* RX bus dma tag */
+	bus_dma_tag_t	sc_tdmatag;	/* RX bus dma tag */
+	bus_space_handle_t sc_sebh;	/* HME Global registers */
+	bus_space_handle_t sc_erxh;	/* HME ERX registers */
+	bus_space_handle_t sc_etxh;	/* HME ETX registers */
+	bus_space_handle_t sc_mach;	/* HME MAC registers */
+	bus_space_handle_t sc_mifh;	/* HME MIF registers */
+	bus_space_tag_t	sc_sebt;	/* HME Global registers */
+	bus_space_tag_t	sc_erxt;	/* HME ERX registers */
+	bus_space_tag_t	sc_etxt;	/* HME ETX registers */
+	bus_space_tag_t	sc_mact;	/* HME MAC registers */
+	bus_space_tag_t	sc_mift;	/* HME MIF registers */
+	bus_addr_t	sc_sebo;	/* HME Global registers */
+	bus_addr_t	sc_erxo;	/* HME ERX registers */
+	bus_addr_t	sc_etxo;	/* HME ETX registers */
+	bus_addr_t	sc_maco;	/* HME MAC registers */
+	bus_addr_t	sc_mifo;	/* HME MIF registers */
+	int		sc_burst;	/* DVMA burst size in effect */
+	int		sc_phys[2];	/* MII instance -> PHY map */
+
+	int		sc_pci;		/* XXXXX -- PCI buses are LE. */
+
+	/* Ring descriptor */
+	struct hme_ring		sc_rb;
+
+	int			sc_debug;
+
+	/* Special hardware hooks */
+	void	(*sc_hwreset)(struct hme_softc *);
+	void	(*sc_hwinit)(struct hme_softc *);
+};
+
+extern devclass_t hme_devclass;
+
+int	hme_config(struct hme_softc *);
+void	hme_intr(void *);
+
+/* MII methods & callbacks */
+int	hme_mii_readreg(device_t, int, int);
+int	hme_mii_writereg(device_t, int, int, int);
+void	hme_mii_statchg(device_t);