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hd64570var.h revision 1.1 
      1 /*	$Id: hd64570var.h,v 1.1 1998/07/26 03:26:57 explorer Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1998 Vixie Enterprises
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  *
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. Neither the name of Vixie Enterprises nor the names
     17  *    of its contributors may be used to endorse or promote products derived
     18  *    from this software without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY VIXIE ENTERPRISES AND
     21  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
     22  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     23  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     24  * DISCLAIMED.  IN NO EVENT SHALL VIXIE ENTERPRISES OR
     25  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     27  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
     28  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     29  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  * This software has been written for Vixie Enterprises by Michael Graff
     35  * <explorer (at) flame.org>.  To learn more about Vixie Enterprises, see
     36  * ``http://www.vix.com''.
     37  */
     38 
     39 #ifndef _HD64570VAR_H_
     40 #define _HD64570VAR_H_
     41 
     42 #include "bpfilter.h"
     43 
     44 #define SCA_USE_FASTQ		/* use a split queue, one for fast traffic */
     45 
     46 struct sca_softc;
     47 typedef struct sca_port sca_port_t;
     48 typedef struct sca_desc sca_desc_t;
     49 
     50 /*
     51  * device DMA descriptor
     52  */
     53 struct sca_desc {
     54 	u_int16_t	cp;	/* chain pointer */
     55 	u_int16_t	bp;	/* buffer pointer (low bits) */
     56 	u_int8_t	bpb;	/* buffer pointer (high bits) */
     57 	u_int8_t	unused0;
     58 	u_int16_t	len;	/* total length */
     59 	u_int8_t	stat;	/* status */
     60 	u_int8_t	unused1;
     61 };
     62 #define SCA_DESC_EOT            0x01
     63 #define SCA_DESC_CRC            0x04
     64 #define SCA_DESC_OVRN           0x08
     65 #define SCA_DESC_RESD           0x10
     66 #define SCA_DESC_ABORT          0x20
     67 #define SCA_DESC_SHRTFRM        0x40
     68 #define SCA_DESC_EOM            0x80
     69 #define SCA_DESC_ERRORS         0x7C
     70 
     71 /*
     72  * softc structure for each port
     73  */
     74 struct sca_port {
     75 	u_int msci_off;		/* offset for msci address for this port */
     76 	u_int dmac_off;		/* offset of dmac address for this port */
     77 
     78 	u_int sp_port;
     79 
     80 	/*
     81 	 * CISCO keepalive stuff
     82 	 */
     83 	u_int32_t	cka_lasttx;
     84 	u_int32_t	cka_lastrx;
     85 
     86 	/*
     87 	 * start of each important bit of information for transmit and
     88 	 * receive buffers.
     89 	 */
     90 	u_int32_t txdesc_p;
     91 	sca_desc_t *txdesc;
     92 	u_int32_t txbuf_p;
     93 	u_int8_t *txbuf;
     94 	volatile u_int txcur;		/* last descriptor in chain */
     95 	volatile u_int txinuse;		/* descriptors in use */
     96 	volatile u_int txstart;		/* start descriptor */
     97 
     98 	u_int32_t rxdesc_p;
     99 	sca_desc_t *rxdesc;
    100 	u_int32_t rxbuf_p;
    101 	u_int8_t *rxbuf;
    102 	u_int rxstart;			/* index of first descriptor */
    103 	u_int rxend;			/* index of last descriptor */
    104 
    105 	struct ifnet sp_if;		/* the network information */
    106 	struct ifqueue linkq;		/* link-level packets are high prio */
    107 #ifdef SCA_USE_FASTQ
    108 	struct ifqueue fastq;		/* interactive packets */
    109 #endif
    110 
    111 #if NBPFILTER > 0
    112 	caddr_t	sp_bpf;			/* hook for BPF */
    113 #endif
    114 
    115 	struct sca_softc *sca;		/* pointer to parent */
    116 };
    117 
    118 /*
    119  * softc structure for the chip itself
    120  */
    121 struct sca_softc {
    122 	struct device *parent;		/* our parent device, or NULL */
    123 	int sc_numports;		/* number of ports present */
    124 
    125 	/*
    126 	 * a callback into the parent, since the SCA chip has no control
    127 	 * over DTR, we have to make a callback into the parent, which
    128 	 * might know about DTR.
    129 	 *
    130 	 * If the function pointer is NULL, no callback is specified.
    131 	 */
    132 	void (*dtr_callback) __P((void *aux, int port, int state));
    133 	void *dtr_aux;
    134 
    135 	sca_port_t sc_ports[2];
    136 	bus_space_handle_t sc_ioh;
    137 	bus_space_tag_t sc_iot;
    138 
    139 	bus_dma_tag_t sc_dmat;		/* bus dma tag */
    140 	bus_dmamap_t sc_dmam;		/* bus dma map */
    141 	bus_dma_segment_t sc_seg;	/* bus dma segment allocated */
    142 	caddr_t sc_dma_addr;		/* kva address of segment */
    143 	u_long sc_allocsize;		/* size of region */
    144 };
    145 
    146 
    147 int	sca_init(struct sca_softc *, u_int);
    148 void	sca_port_attach(struct sca_softc *, u_int);
    149 int	sca_hardintr(struct sca_softc *);
    150 void	sca_shutdown(struct sca_softc *);
    151 
    152 #endif /* _HD64570VAR_H_ */
    153