FreeBSD/Linux Kernel Cross Reference
sys/dev/snc/dp83932var.h

     /*      $FreeBSD$       */
     /*      $NecBSD: dp83932var.h,v 1.3 1999/01/24 01:39:51 kmatsuda Exp $  */
     /*      $NetBSD: if_snvar.h,v 1.12 1998/05/01 03:42:47 scottr Exp $     */
     
     /*-
      * [NetBSD for NEC PC-98 series]
      *  Copyright (c) 1997, 1998, 1999
      *      Kouichi Matsuda.  All rights reserved.
      *
     * Copyright (c) 1991   Algorithmics Ltd (http://www.algor.co.uk)
     * You may use, copy, and modify this program so long as you retain the
     * copyright line.
     */
    
    /*
     * if_snvar.h -- National Semiconductor DP8393X (SONIC) NetBSD/mac68k vars
     */
    /*
     * Modified for NetBSD/pc98 1.2.1 from NetBSD/mac68k 1.2D by Kouichi Matsuda.
     * Make adapted for NEC PC-9801-83, 84, PC-9801-103, 104, PC-9801N-25 and
     * PC-9801N-J02, J02R, which uses National Semiconductor DP83934AVQB as
     * Ethernet Controller and National Semiconductor NS46C46 as
     * (64 * 16 bits) Microwire Serial EEPROM.
     */
    
    /* borrow from arch/mac68k/dev/if_mcvar.h for debug. */
    #ifdef DDB
    #define integrate
    #define hide
    #else
    #define integrate       static __inline
    #define hide            static
    #endif
    
    /* NetBSD Emulation */
    #ifdef __NetBSD__
    #define splhardnet      splnet
    #endif
    #ifdef __FreeBSD__
    #define splhardnet      splimp
    #ifndef NBPG
    #define NBPG PAGE_SIZE
    #endif
    #ifndef PGOFSET
    #define PGOFSET PAGE_MASK
    #endif
    typedef unsigned long ulong;
    #define delay(x) DELAY(x)
    #endif
    
    /*
     * Vendor types
     */
    
    /*
     * SONIC buffers need to be aligned 16 or 32 bit aligned.
     * These macros calculate and verify alignment.
     */
    #define ROUNDUP(p, N)   (((int) p + N - 1) & ~(N - 1))
    
    #define SOALIGN(m, array)       (m ? (ROUNDUP(array, 4)) : (ROUNDUP(array, 2)))
    
    #define LOWER(x) ((unsigned)(x) & 0xffff)
    #define UPPER(x) ((unsigned)(x) >> 16)
    
    /*
     * Memory access macros. Since we handle SONIC in 16 bit mode (PB5X0)
     * and 32 bit mode (everything else) using a single GENERIC kernel
     * binary, all structures have to be accessed using macros which can
     * adjust the offsets appropriately.
     */
    /* m is not sc->bitmode, we treat m as sc. */
    #define SWO(m, a, o, x) (*(m)->sc_writetodesc)((m), (a), (o), (x))
    #define SRO(m, a, o)    (*(m)->sc_readfromdesc)((m), (a), (o))
    
    /*
     * Register access macros. We use bus_space_* to talk to the Sonic
     * registers. A mapping table is used in case a particular configuration
     * hooked the regs up at non-word offsets.
     */
    #define NIC_GET(sc, reg)        (*(sc)->sc_nic_get)(sc, reg)
    #define NIC_PUT(sc, reg, val)   (*(sc)->sc_nic_put)(sc, reg, val)
    
    #define SONIC_GETDMA(p) (p)
    
    /* pc98 does not have any write buffers to flush... */
    #define wbflush()
    
    /*
     * buffer sizes in 32 bit mode
     * 1 TXpkt is 4 hdr words + (3 * FRAGMAX) + 1 link word == 23 words == 92 bytes
     *
     * 1 RxPkt is 7 words == 28 bytes
     * 1 Rda   is 4 words == 16 bytes
     *
     * The CDA is 17 words == 68 bytes
     *
     * total space in page 0 = NTDA * 92 + NRRA * 16 + NRDA * 28 + 68
     */
   
   #define NRBA    16              /* # receive buffers < NRRA */
   #define RBAMASK (NRBA-1)
   #define NTDA    16              /* # transmit descriptors */
   #define NRRA    64              /* # receive resource descriptors */
   #define RRAMASK (NRRA-1)        /* the reason why NRRA must be power of two */
   
   #define FCSSIZE 4               /* size of FCS appended to packets */
   
   /*
    * maximum receive packet size plus 2 byte pad to make each
    * one aligned. 4 byte slop (required for eobc)
    */
   #define RBASIZE(sc)     (sizeof(struct ether_header) + ETHERMTU + FCSSIZE + \
                            ((sc)->bitmode ? 6 : 2))
   
   /*
    * transmit buffer area
    */
   #define TXBSIZE 1536    /* 6*2^8 -- the same size as the 8390 TXBUF */
   
   #define SN_NPAGES       2 + NRBA + (NTDA/2)
   
   typedef struct mtd {
           u_int32_t       mtd_vtxp;
           u_int32_t       mtd_vbuf;
           struct mbuf     *mtd_mbuf;
   } mtd_t;
   
   /*
    * The snc_softc for PC-98 if_snc.
    */
   typedef struct snc_softc {
           struct arpcom   sc_ethercom;
   #define sc_if           sc_ethercom.ac_if       /* network visible interface */
   
           device_t        sc_dev;
   
           struct resource *       ioport;
           int                     ioport_rid;
           struct resource *       iomem;
           int                     iomem_rid;
           struct resource *       irq;
           int                     irq_rid;
           void *                  irq_handle;
   
           bus_space_tag_t         sc_iot;         /* bus identifier for io */
           bus_space_tag_t         sc_memt;        /* bus identifier for mem */
           bus_space_handle_t      sc_ioh;         /* io handle */
           bus_space_handle_t      sc_memh;        /* bus memory handle */
   
           int             bitmode;        /* 32 bit mode == 1, 16 == 0 */
   
           u_int16_t       sncr_dcr;       /* DCR for this instance */
           u_int16_t       sncr_dcr2;      /* DCR2 for this instance */
   
           int             sc_rramark;     /* index into v_rra of wp */
           u_int32_t       v_rra[NRRA];    /* DMA addresses of v_rra */
           u_int32_t       v_rea;          /* ptr to the end of the rra space */
   
           int             sc_rxmark;      /* current hw pos in rda ring */
           int             sc_rdamark;     /* current sw pos in rda ring */
           int             sc_nrda;        /* total number of RDAs */
           u_int32_t       v_rda;
   
           u_int32_t       rbuf[NRBA];
   
           struct mtd      mtda[NTDA];
           int             mtd_hw;         /* idx of first mtd given to hw */
           int             mtd_prev;       /* idx of last mtd given to hardware */
           int             mtd_free;       /* next free mtd to use */
           int             mtd_tlinko;     /*
                                            * offset of tlink of last txp given
                                            * to SONIC. Need to clear EOL on
                                            * this word to add a desc.
                                            */
           int             mtd_pint;       /* Counter to set TXP_PINT */
   
           u_int32_t       v_cda;
   
           u_int8_t        curbank;        /* current window bank */
   
           struct  ifmedia sc_media;       /* supported media information */
   
           /*
            * NIC register access functions:
            */
           u_int16_t       (*sc_nic_get)
                   (struct snc_softc *, u_int8_t);
           void            (*sc_nic_put)
                   (struct snc_softc *, u_int8_t, u_int16_t);
   
           /*
            * Memory functions:
            *
            *      copy to/from descriptor
            *      copy to/from buffer
            *      zero bytes in buffer
            */
           void            (*sc_writetodesc)
                   (struct snc_softc *, u_int32_t, u_int32_t, u_int16_t);
           u_int16_t       (*sc_readfromdesc)
                   (struct snc_softc *, u_int32_t, u_int32_t);
           void            (*sc_copytobuf)
                   (struct snc_softc *, void *, u_int32_t, size_t);
           void            (*sc_copyfrombuf)
                   (struct snc_softc *, void *, u_int32_t, size_t);
           void            (*sc_zerobuf)
                   (struct snc_softc *, u_int32_t, size_t);
   
           /*
            * Machine-dependent functions:
            *
            *      hardware reset hook - may be NULL
            *      hardware init hook - may be NULL
            *      media change hook - may be NULL
            */
           void    (*sc_hwreset)(struct snc_softc *);
           void    (*sc_hwinit)(struct snc_softc *);
           int     (*sc_mediachange)(struct snc_softc *);
           void    (*sc_mediastatus)(struct snc_softc *, struct ifmediareq *);
   
           int     sc_enabled;     /* boolean; power enabled on interface */
   
           int     (*sc_enable)(struct snc_softc *);
           void    (*sc_disable)(struct snc_softc *);
   
           void    *sc_sh;         /* shutdownhook cookie */
           int     gone;
   
   #if NRND > 0
           rndsource_element_t     rnd_source;
   #endif
   } snc_softc_t;
   
   /*
    * Accessing SONIC data structures and registers as 32 bit values
    * makes code endianess independent.  The SONIC is however always in
    * bigendian mode so it is necessary to ensure that data structures shared
    * between the CPU and the SONIC are always in bigendian order.
    */
   
   /*
    * Receive Resource Descriptor
    * This structure describes the buffers into which packets
    * will be received.  Note that more than one packet may be
    * packed into a single buffer if constraints permit.
    */
   #define RXRSRC_PTRLO    0       /* buffer address LO */
   #define RXRSRC_PTRHI    1       /* buffer address HI */
   #define RXRSRC_WCLO     2       /* buffer size (16bit words) LO */
   #define RXRSRC_WCHI     3       /* buffer size (16bit words) HI */
   
   #define RXRSRC_SIZE(sc) (sc->bitmode ? (4 * 4) : (4 * 2))
   
   /*
    * Receive Descriptor
    * This structure holds information about packets received.
    */
   #define RXPKT_STATUS    0
   #define RXPKT_BYTEC     1
   #define RXPKT_PTRLO     2
   #define RXPKT_PTRHI     3
   #define RXPKT_SEQNO     4
   #define RXPKT_RLINK     5
   #define RXPKT_INUSE     6
   #define RXPKT_SIZE(sc)  (sc->bitmode ? (7 * 4) : (7 * 2))
   
   #define RBASEQ(x) (((x)>>8)&0xff)
   #define PSNSEQ(x) ((x) & 0xff)
   
   /*
    * Transmit Descriptor
    * This structure holds information about packets to be transmitted.
    */
   #define FRAGMAX 8               /* maximum number of fragments in a packet */
   
   #define TXP_STATUS      0       /* + transmitted packet status */
   #define TXP_CONFIG      1       /* transmission configuration */
   #define TXP_PKTSIZE     2       /* entire packet size in bytes */
   #define TXP_FRAGCNT     3       /* # fragments in packet */
   
   #define TXP_FRAGOFF     4       /* offset to first fragment */
   #define TXP_FRAGSIZE    3       /* size of each fragment desc */
   #define TXP_FPTRLO      0       /* ptr to packet fragment LO */
   #define TXP_FPTRHI      1       /* ptr to packet fragment HI */
   #define TXP_FSIZE       2       /* fragment size */
   
   #define TXP_WORDS       (TXP_FRAGOFF + (FRAGMAX*TXP_FRAGSIZE) + 1)      /* 1 for tlink */
   #define TXP_SIZE(sc)    ((sc->bitmode) ? (TXP_WORDS*4) : (TXP_WORDS*2))
   
   #define EOL     0x0001          /* end of list marker for link fields */
   
   /*
    * CDA, the CAM descriptor area. The SONIC has a 16 entry CAM to
    * match incoming addresses against. It is programmed via DMA
    * from a memory region.
    */
   #define MAXCAM  16      /* number of user entries in CAM */
   #define CDA_CAMDESC     4       /* # words i na descriptor */
   #define CDA_CAMEP       0       /* CAM Address Port 0 xx-xx-xx-xx-YY-YY */
   #define CDA_CAMAP0      1       /* CAM Address Port 1 xx-xx-YY-YY-xx-xx */
   #define CDA_CAMAP1      2       /* CAM Address Port 2 YY-YY-xx-xx-xx-xx */
   #define CDA_CAMAP2      3
   #define CDA_ENABLE      64      /* mask enabling CAM entries */
   #define CDA_SIZE(sc)    ((4*16 + 1) * ((sc->bitmode) ? 4 : 2))
   
   void    sncconfig(struct snc_softc *, int *, int, int, u_int8_t *);
   void    sncintr(void *);
   void    sncshutdown(void *);

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