FreeBSD/Linux Kernel Cross Reference
sys/dev/le/lancevar.h

     /*      $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.
     *
     * 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_
    
    extern devclass_t le_devclass;
    
    struct lance_softc {
            struct ifnet    *sc_ifp;
            struct ifmedia  sc_media;
            struct mtx      sc_mtx;
            struct callout  sc_wdog_ch;
            int             sc_wdog_timer;
    
            /*
             * 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 */
            bus_addr_t      sc_addr;        /* base address of RAM - LANCE's view */
    
            bus_size_t      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)
   
   /*
    * Unfortunately, manual byte swapping is only necessary for the PCnet-PCI
    * variants but not for the original LANCE or ILACC so we cannot do this
    * with #ifdefs resolved at compile time.
    */
   #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 *);
   struct mbuf *lance_get(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 */
   
   /*
    * Compare two Ether/802 addresses for equality, inlined and
    * unrolled for speed.  Use this like memcmp().
    *
    * XXX: Add <machine/inlines.h> for stuff like this?
    * XXX: or maybe add it to libkern.h instead?
    *
    * "I'd love to have an inline assembler version of this."
    * XXX: Who wanted that? mycroft?  I wrote one, but this
    * version in C is as good as hand-coded assembly. -gwr
    *
    * Please do NOT tweak this without looking at the actual
    * assembly code generated before and after your tweaks!
    */
   static inline uint16_t
   ether_cmp(void *one, void *two)
   {
           uint16_t *a = (u_short *)one;
           uint16_t *b = (u_short *)two;
           uint16_t diff;
   
   #ifdef  m68k
           /*
            * The post-increment-pointer form produces the best
            * machine code for m68k.  This was carefully tuned
            * so it compiles to just 8 short (2-byte) op-codes!
            */
           diff  = *a++ - *b++;
           diff |= *a++ - *b++;
           diff |= *a++ - *b++;
   #else
           /*
            * Most modern CPUs do better with a single expresion.
            * Note that short-cut evaluation is NOT helpful here,
            * because it just makes the code longer, not faster!
            */
           diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]);
   #endif
   
           return (diff);
   }
   
   #endif /* _DEV_LE_LANCEVAR_H_ */

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