FreeBSD/Linux Kernel Cross Reference
sys/dev/en/midwayvar.h

     /*      $NetBSD: midwayvar.h,v 1.10 1997/03/20 21:34:46 chuck Exp $     */
     
     /*-
      * Copyright (c) 1996 Charles D. Cranor and Washington University.
      * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Charles D. Cranor and
     *      Washington University.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * 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.
     *
     * $FreeBSD: releng/9.0/sys/dev/en/midwayvar.h 147256 2005-06-10 16:49:24Z brooks $
     */
    
    /*
     * m i d w a y v a r . h
     *
     * we define the en_softc here so that bus specific modules can allocate
     * it as the first item in their softc. 
     *
     * author: Chuck Cranor <chuck@ccrc.wustl.edu>
     */
    
    /*
     * params needed to determine softc size
     */
    #ifndef EN_NTX
    #define EN_NTX          8       /* number of tx bufs to use */
    #endif
    #ifndef EN_TXSZ
    #define EN_TXSZ         32      /* trasmit buf size in KB */
    #endif
    #ifndef EN_RXSZ
    #define EN_RXSZ         32      /* recv buf size in KB */
    #endif
    
    /* largest possible NRX (depends on RAM size) */
    #define EN_MAXNRX       ((2048 - (EN_NTX * EN_TXSZ)) / EN_RXSZ)
    
    #ifndef EN_MAX_DMASEG
    #define EN_MAX_DMASEG   32
    #endif
    
    /* number of bytes to use in the first receive buffer. This must not be larger
     * than MHLEN, should be a multiple of 64 and must be a multiple of 4. */
    #define EN_RX1BUF       128
    
    /*
     * Structure to hold DMA maps. These are handle via a typestable uma zone.
     */
    struct en_map {
            uintptr_t       flags;          /* map flags */
            struct en_map   *rsvd2;         /* see uma_zalloc(9) */
            struct en_softc *sc;            /* back pointer */
            bus_dmamap_t    map;            /* the map */
    };
    #define ENMAP_LOADED    0x02
    #define ENMAP_ALLOC     0x01
    
    #define EN_MAX_MAPS     400
    
    /*
     * Statistics
     */
    struct en_stats {
            uint32_t vtrash;        /* sw copy of counter */
            uint32_t otrash;        /* sw copy of counter */
            uint32_t ttrash;        /* # of RBD's with T bit set */
            uint32_t mfixaddr;      /* # of times we had to mfix an address */
            uint32_t mfixlen;       /* # of times we had to mfix a lenght*/
            uint32_t mfixfail;      /* # of times mfix failed */
            uint32_t txmbovr;       /* # of times we dropped due to mbsize */
            uint32_t dmaovr;        /* tx dma overflow count */
            uint32_t txoutspace;    /* out of space in xmit buffer */
            uint32_t txdtqout;      /* out of DTQs */
            uint32_t launch;        /* total # of launches */
            uint32_t hwpull;        /* # of pulls off hardware service list */
            uint32_t swadd;         /* # of pushes on sw service list */
           uint32_t rxqnotus;      /* # of times we pull from rx q, but fail */
           uint32_t rxqus;         /* # of good pulls from rx q */
           uint32_t rxdrqout;      /* # of times out of DRQs */
           uint32_t rxmbufout;     /* # of time out of mbufs */
           uint32_t txnomap;       /* out of DMA maps in TX */
   };
   
   /*
    * Each of these structures describes one of the eight transmit channels
    */
   struct en_txslot {
           uint32_t        mbsize;         /* # mbuf bytes in use (max=TXHIWAT) */
           uint32_t        bfree;          /* # free bytes in buffer */
           uint32_t        start;          /* start of buffer area (byte offset) */
           uint32_t        stop;           /* ends of buffer area (byte offset) */
           uint32_t        cur;            /* next free area (byte offset) */
           uint32_t        nref;           /* # of VCs using this channel */
           struct ifqueue  q;              /* mbufs waiting for DMA now */
           struct ifqueue  indma;          /* mbufs waiting for DMA now */
   };
   
   /*
    * Each of these structures is used for each of the receive buffers on the
    * card.
    */
   struct en_rxslot {
           uint32_t        mode;           /* saved copy of mode info */
           uint32_t        start;          /* begin of my buffer area */
           uint32_t        stop;           /* end of my buffer area */
           uint32_t        cur;            /* where I am at in the buffer */
           struct en_vcc   *vcc;           /* backpointer to VCI */
           struct ifqueue  q;              /* mbufs waiting for dma now */
           struct ifqueue  indma;          /* mbufs being dma'd now */
   };
   
   struct en_vcc {
           struct atmio_vcc vcc;           /* required by common code */
           void            *rxhand;
           u_int           vflags;
           uint32_t        ipackets;
           uint32_t        opackets;
           uint32_t        ibytes;
           uint32_t        obytes;
   
           uint8_t         txspeed;
           struct en_txslot *txslot;       /* transmit slot */
           struct en_rxslot *rxslot;       /* receive slot */
   };
   #define VCC_DRAIN       0x0001          /* closed, but draining rx */
   #define VCC_SWSL        0x0002          /* on rx software service list */
   #define VCC_CLOSE_RX    0x0004          /* currently closing */
   
   /*
    * softc
    */
   struct en_softc {
           struct ifnet    *ifp;
           device_t dev;
   
           /* bus glue */
           bus_space_tag_t en_memt;        /* for EN_READ/EN_WRITE */
           bus_space_handle_t en_base;     /* base of en card */
           bus_size_t en_obmemsz;          /* size of en card (bytes) */
           void (*en_busreset)(void *);    /* bus specific reset function */
           bus_dma_tag_t txtag;            /* TX DMA tag */
   
           /* serv list */
           uint32_t hwslistp;      /* hw pointer to service list (byte offset) */
           uint16_t swslist[MID_SL_N]; /* software svc list (see en_service()) */
           uint16_t swsl_head;     /* ends of swslist (index into swslist) */
           uint16_t swsl_tail;
           uint32_t swsl_size;     /* # of items in swsl */
   
           /* xmit dma */
           uint32_t dtq[MID_DTQ_N];/* sw copy of dma q (see EN_DQ_MK macros) */
           uint32_t dtq_free;      /* # of dtq's free */
           uint32_t dtq_us;        /* software copy of our pointer (byte offset) */
           uint32_t dtq_chip;      /* chip's pointer (byte offset) */
           uint32_t need_dtqs;     /* true if we ran out of DTQs */
   
           /* recv dma */
           uint32_t drq[MID_DRQ_N];/* sw copy of dma q (see ENIDQ macros) */
           uint32_t drq_free;      /* # of drq's free */
           uint32_t drq_us;        /* software copy of our pointer (byte offset) */
           uint32_t drq_chip;      /* chip's pointer (byte offset) */
           uint32_t need_drqs;     /* true if we ran out of DRQs */
   
           /* xmit buf ctrl. (per channel) */
           struct en_txslot txslot[MID_NTX_CH];
   
           /* recv buf ctrl. (per recv slot) */
           struct en_rxslot rxslot[EN_MAXNRX];
           int en_nrx;                     /* # of active rx slots */
   
           /* vccs */
           struct en_vcc **vccs;
           u_int vccs_open;
           struct cv cv_close;             /* close CV */
   
           /* stats */
           struct en_stats stats;
   
           /* random stuff */
           uint32_t ipl;           /* sbus interrupt lvl (1 on pci?) */
           uint8_t bestburstcode;  /* code of best burst we can use */
           uint8_t bestburstlen;   /* length of best burst (bytes) */
           uint8_t bestburstshift; /* (x >> shift) == (x / bestburstlen) */
           uint8_t bestburstmask;  /* bits to check if not multiple of burst */
           uint8_t alburst;        /* align dma bursts? */
           uint8_t noalbursts;     /* don't use unaligned > 4 byte bursts */
           uint8_t is_adaptec;     /* adaptec version of midway? */
           struct mbuf *padbuf;    /* buffer of zeros for TX padding */
   
           /* mutex to protect this structure and the associated hardware */
           struct mtx en_mtx;
   
           /* sysctl support */
           struct sysctl_ctx_list sysctl_ctx;
           struct sysctl_oid *sysctl_tree;
   
           /* memory zones */
           uma_zone_t map_zone;
   
           /* media and phy */
           struct ifmedia media;
           struct utopia utopia;
   
   #ifdef EN_DEBUG
           /* debugging */
           u_int debug;
   #endif
   };
   
   /*
    * exported functions
    */
   int     en_attach(struct en_softc *);
   void    en_destroy(struct en_softc *);
   void    en_intr(void *);
   void    en_reset(struct en_softc *);
   int     en_modevent(module_t, int, void *arg);

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