FreeBSD/Linux Kernel Cross Reference
sys/dev/hme/if_hmevar.h

     /*-
      * 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: releng/5.0/sys/dev/hme/if_hmevar.h 93043 2002-03-23 19:37:11Z tmm $
     */
    
    #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)).
     */
    #define HME_NRXDESC     128
    #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);

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