path: root/sys/dev/ic/gemvar.h

/*	$NetBSD: gemvar.h,v 1.1 2001/09/16 00:11:43 eeh Exp $ */

/*
 * 
 * Copyright (C) 2001 Eduardo Horvath.
 * All rights reserved.
 *
 *
 * 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.
 *  
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR  ``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	_IF_GEMVAR_H
#define	_IF_GEMVAR_H

#include <sys/queue.h>
#include <sys/timeout.h>

/*
 * Misc. definitions for the Sun ``Gem'' Ethernet controller family driver.  
 */

/*
 * Transmit descriptor list size.  This is arbitrary, but allocate
 * enough descriptors for 64 pending transmissions and 16 segments
 * per packet.  
 */
#define	GEM_NTXSEGS		16

#define	GEM_TXQUEUELEN		64
#define	GEM_NTXDESC		(GEM_TXQUEUELEN * GEM_NTXSEGS)
#define	GEM_NTXDESC_MASK	(GEM_NTXDESC - 1)
#define	GEM_NEXTTX(x)		((x + 1) & GEM_NTXDESC_MASK)

/*
 * Receive descriptor list size.  We have one Rx buffer per incoming
 * packet, so this logic is a little simpler.
 */
#define	GEM_NRXDESC		64
#define	GEM_NRXDESC_MASK	(GEM_NRXDESC - 1)
#define	GEM_NEXTRX(x)		((x + 1) & GEM_NRXDESC_MASK)

/*
 * Control structures are DMA'd to the GEM chip.  We allocate them in
 * a single clump that maps to a single DMA segment to make several things
 * easier.
 */
struct gem_control_data {
	/*
	 * The transmit descriptors.
	 */
	struct gem_desc gcd_txdescs[GEM_NTXDESC];

	/*
	 * The receive descriptors.
	 */
	struct gem_desc gcd_rxdescs[GEM_NRXDESC];
};

#define	GEM_CDOFF(x)		offsetof(struct gem_control_data, x)
#define	GEM_CDTXOFF(x)		GEM_CDOFF(gcd_txdescs[(x)])
#define	GEM_CDRXOFF(x)		GEM_CDOFF(gcd_rxdescs[(x)])

/*
 * Software state for transmit jobs.
 */
struct gem_txsoft {
	struct mbuf *txs_mbuf;		/* head of our mbuf chain */
	bus_dmamap_t txs_dmamap;	/* our DMA map */
	int txs_firstdesc;		/* first descriptor in packet */
	int txs_lastdesc;		/* last descriptor in packet */
	int txs_ndescs;			/* number of descriptors */
	SIMPLEQ_ENTRY(gem_txsoft) txs_q;
};

SIMPLEQ_HEAD(gem_txsq, gem_txsoft);

/*
 * Software state for receive jobs.
 */
struct gem_rxsoft {
	struct mbuf *rxs_mbuf;		/* head of our mbuf chain */
	bus_dmamap_t rxs_dmamap;	/* our DMA map */
};


/*
 * Table which describes the transmit threshold mode.  We generally
 * start at index 0.  Whenever we get a transmit underrun, we increment
 * our index, falling back if we encounter the NULL terminator.
 */
struct gem_txthresh_tab {
	u_int32_t txth_opmode;		/* OPMODE bits */
	const char *txth_name;		/* name of mode */
};

/*
 * Some misc. statics, useful for debugging.
 */
struct gem_stats {
	u_long		ts_tx_uf;	/* transmit underflow errors */
	u_long		ts_tx_to;	/* transmit jabber timeouts */
	u_long		ts_tx_ec;	/* excessve collision count */
	u_long		ts_tx_lc;	/* late collision count */
};

/*
 * Software state per device.
 */
struct gem_softc {
	struct device	sc_dev;		/* generic device information */
	struct arpcom	sc_arpcom;	/* ethernet common data */
	struct mii_data	sc_mii;		/* MII media control */
#define sc_media	sc_mii.mii_media/* shorthand */
	struct timeout	sc_tick_ch;	/* tick callout */

	/* The following bus handles are to be provided by the bus front-end */
	bus_space_tag_t	sc_bustag;	/* bus tag */
	bus_dma_tag_t	sc_dmatag;	/* bus dma tag */
	bus_dmamap_t	sc_dmamap;	/* bus dma handle */
	bus_space_handle_t sc_h;	/* bus space handle for all regs */
#if 0
	/* The following may be needed for SBus */
	bus_space_handle_t sc_seb;	/* HME Global registers */
	bus_space_handle_t sc_erx;	/* HME ERX registers */
	bus_space_handle_t sc_etx;	/* HME ETX registers */
	bus_space_handle_t sc_mac;	/* HME MAC registers */
	bus_space_handle_t sc_mif;	/* HME MIF registers */
#endif
	int		sc_burst;	/* DVMA burst size in effect */
	int		sc_phys[2];	/* MII instance -> PHY map */

	int		sc_mif_config;	/* Selected MII reg setting */

	int		sc_pci;		/* XXXXX -- PCI buses are LE. */

	void *sc_sdhook;		/* shutdown hook */
	void *sc_powerhook;		/* power management hook */

	struct gem_stats sc_stats;	/* debugging stats */

	/*
	 * Ring buffer DMA stuff.
	 */
	bus_dma_segment_t sc_cdseg;	/* control data memory */
	int		sc_cdnseg;	/* number of segments */
	bus_dmamap_t sc_cddmamap;	/* control data DMA map */
#define	sc_cddma	sc_cddmamap->dm_segs[0].ds_addr

	/*
	 * Software state for transmit and receive descriptors.
	 */
	struct gem_txsoft sc_txsoft[GEM_TXQUEUELEN];
	struct gem_rxsoft sc_rxsoft[GEM_NRXDESC];

	/*
	 * Control data structures.
	 */
	struct gem_control_data *sc_control_data;
#define	sc_txdescs	sc_control_data->gcd_txdescs
#define	sc_rxdescs	sc_control_data->gcd_rxdescs

	int			sc_txfree;		/* number of free Tx descriptors */
	int			sc_txnext;		/* next ready Tx descriptor */

	u_int32_t		sc_tdctl_ch;		/* conditional desc chaining */
	u_int32_t		sc_tdctl_er;		/* conditional desc end-of-ring */

	u_int32_t		sc_setup_fsls;	/* FS|LS on setup descriptor */

	struct gem_txsq		sc_txfreeq;	/* free Tx descsofts */
	struct gem_txsq		sc_txdirtyq;	/* dirty Tx descsofts */

	int			sc_rxptr;		/* next ready RX descriptor/descsoft */

	/* ========== */
	int			sc_inited;
	int			sc_flags;
	int			sc_debug;
	void			*sc_sh;		/* shutdownhook cookie */
	u_int8_t		sc_enaddr[ETHER_ADDR_LEN]; /* MAC address */

	/* Special hardware hooks */
	void	(*sc_hwreset) __P((struct gem_softc *));
	void	(*sc_hwinit) __P((struct gem_softc *));
};

/* sc_flags */
#define	GEMF_WANT_SETUP		0x00000001	/* want filter setup */
#define	GEMF_DOING_SETUP	0x00000002	/* doing multicast setup */
#define	GEMF_HAS_MII		0x00000004	/* has media on MII */
#define	GEMF_IC_FS		0x00000008	/* IC bit on first tx seg */
#define	GEMF_MRL		0x00000010	/* memory read line okay */
#define	GEMF_MRM		0x00000020	/* memory read multi okay */
#define	GEMF_MWI		0x00000040	/* memory write inval okay */
#define	GEMF_AUTOPOLL		0x00000080	/* chip supports auto-poll */
#define	GEMF_LINK_UP		0x00000100	/* link is up (non-MII) */
#define	GEMF_LINK_VALID		0x00000200	/* link state valid */
#define	GEMF_DOINGAUTO		0x00000400	/* doing autoneg (non-MII) */
#define	GEMF_ATTACHED		0x00000800	/* attach has succeeded */
#define	GEMF_ENABLED		0x00001000	/* chip is enabled */
#define	GEMF_BLE		0x00002000	/* data is big endian */
#define	GEMF_DBO		0x00004000	/* descriptor is big endian */

#define	GEM_IS_ENABLED(sc)	((sc)->sc_flags & GEMF_ENABLED)

/*
 * This macro returns the current media entry for *non-MII* media.
 */
#define	GEM_CURRENT_MEDIA(sc)						\
	(IFM_SUBTYPE((sc)->sc_mii.mii_media.ifm_cur->ifm_media) != IFM_AUTO ? \
	 (sc)->sc_mii.mii_media.ifm_cur : (sc)->sc_nway_active)

/*
 * This macro determines if a change to media-related OPMODE bits requires
 * a chip reset.
 */
#define	GEM_MEDIA_NEEDSRESET(sc, newbits)				\
	(((sc)->sc_opmode & OPMODE_MEDIA_BITS) !=			\
	 ((newbits) & OPMODE_MEDIA_BITS))

#define	GEM_CDTXADDR(sc, x)	((sc)->sc_cddma + GEM_CDTXOFF((x)))
#define	GEM_CDRXADDR(sc, x)	((sc)->sc_cddma + GEM_CDRXOFF((x)))

#define	GEM_CDSPADDR(sc)	((sc)->sc_cddma + GEM_CDSPOFF)

#define	GEM_CDTXSYNC(sc, x, n, ops)					\
do {									\
	int __x, __n;							\
									\
	__x = (x);							\
	__n = (n);							\
									\
	/* If it will wrap around, sync to the end of the ring. */	\
	if ((__x + __n) > GEM_NTXDESC) {				\
		bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap,	\
		    GEM_CDTXOFF(__x), sizeof(struct gem_desc) *		\
		    (GEM_NTXDESC - __x), (ops));			\
		__n -= (GEM_NTXDESC - __x);				\
		__x = 0;						\
	}								\
									\
	/* Now sync whatever is left. */				\
	bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap,		\
	    GEM_CDTXOFF(__x), sizeof(struct gem_desc) * __n, (ops));	\
} while (0)

#define	GEM_CDRXSYNC(sc, x, ops)					\
	bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap,		\
	    GEM_CDRXOFF((x)), sizeof(struct gem_desc), (ops))

#define	GEM_CDSPSYNC(sc, ops)						\
	bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap,		\
	    GEM_CDSPOFF, GEM_SETUP_PACKET_LEN, (ops))

#define	GEM_INIT_RXDESC(sc, x)						\
do {									\
	struct gem_rxsoft *__rxs = &sc->sc_rxsoft[(x)];			\
	struct gem_desc *__rxd = &sc->sc_rxdescs[(x)];			\
	struct mbuf *__m = __rxs->rxs_mbuf;				\
									\
	__m->m_data = __m->m_ext.ext_buf;				\
	__rxd->gd_addr =						\
	    htole64(__rxs->rxs_dmamap->dm_segs[0].ds_addr);		\
	__rxd->gd_flags =						\
	    htole64((((__m->m_ext.ext_size)<<GEM_RD_BUFSHIFT)		\
	    & GEM_RD_BUFSIZE) | GEM_RD_OWN);				\
	GEM_CDRXSYNC((sc), (x), BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); \
} while (0)

#ifdef _KERNEL
void	gem_attach __P((struct gem_softc *, const u_int8_t *));
int	gem_activate __P((struct device *, enum devact));
int	gem_detach __P((struct gem_softc *));
int	gem_intr __P((void *));
int	gem_read_srom __P((struct gem_softc *));
int	gem_srom_crcok __P((const u_int8_t *));
int	gem_isv_srom __P((const u_int8_t *));
int	gem_isv_srom_enaddr __P((struct gem_softc *, u_int8_t *));
int	gem_parse_old_srom __P((struct gem_softc *, u_int8_t *));

int	gem_mediachange __P((struct ifnet *));
void	gem_mediastatus __P((struct ifnet *, struct ifmediareq *));

void	gem_config __P((struct gem_softc *));
void	gem_reset __P((struct gem_softc *));
int	gem_intr __P((void *));
#endif /* _KERNEL */


#endif