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smc83c170var.h revision 1.2 
      1 /*	$NetBSD: smc83c170var.h,v 1.2 1998/08/11 00:13:48 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9  * NASA Ames Research Center.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the NetBSD
     22  *	Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 #ifndef _DEV_IC_SMC83C170VAR_H_
     41 #define _DEV_IC_SMC83C170VAR_H_
     42 
     43 /*
     44  * Misc. definitions for the Standard Microsystems Corp. 83C170
     45  * Ethernet PCI Integrated Controller (EPIC/100) driver.
     46  */
     47 
     48 /*
     49  * Transmit descriptor list size.
     50  */
     51 #define	EPIC_NTXDESC		128
     52 #define	EPIC_NTXDESC_MASK	(EPIC_NTXDESC - 1)
     53 #define	EPIC_NEXTTX(x)		((x + 1) & EPIC_NTXDESC_MASK)
     54 
     55 /*
     56  * Receive descriptor list size.
     57  */
     58 #define	EPIC_NRXDESC		64
     59 #define	EPIC_NRXDESC_MASK	(EPIC_NRXDESC - 1)
     60 #define	EPIC_NEXTRX(x)		((x + 1) & EPIC_NRXDESC_MASK)
     61 
     62 /*
     63  * Control structures are DMA'd to the EPIC chip.  We allocate them in
     64  * a single clump that maps to a single DMA segment to make several things
     65  * easier.
     66  */
     67 struct epic_control_data {
     68 	/*
     69 	 * The transmit descriptors.
     70 	 */
     71 	struct epic_txdesc ecd_txdescs[EPIC_NTXDESC];
     72 
     73 	/*
     74 	 * The receive descriptors.
     75 	 */
     76 	struct epic_rxdesc ecd_rxdescs[EPIC_NRXDESC];
     77 
     78 	/*
     79 	 * The transmit fraglists.
     80 	 */
     81 	struct epic_fraglist ecd_txfrags[EPIC_NTXDESC];
     82 };
     83 
     84 #define	EPIC_CDOFF(x)	offsetof(struct epic_control_data, x)
     85 
     86 /*
     87  * Software state for transmit and receive desciptors.
     88  */
     89 struct epic_descsoft {
     90 	struct mbuf *ds_mbuf;		/* head of mbuf chain */
     91 	bus_dmamap_t ds_dmamap;		/* our DMA map */
     92 };
     93 
     94 /*
     95  * Software state per device.
     96  */
     97 struct epic_softc {
     98 	struct device sc_dev;		/* generic device information */
     99 	bus_space_tag_t sc_st;		/* bus space tag */
    100 	bus_space_handle_t sc_sh;	/* bus space handle */
    101 	bus_dma_tag_t sc_dmat;		/* bus DMA tag */
    102 	struct ethercom sc_ethercom;	/* ethernet common data */
    103 	void *sc_sdhook;		/* shutdown hook */
    104 
    105 	struct mii_data sc_mii;		/* MII/media information */
    106 
    107 	bus_dmamap_t sc_cddmamap;	/* control data DMA map */
    108 #define	sc_cddma	sc_cddmamap->dm_segs[0].ds_addr
    109 
    110 	/*
    111 	 * Software state for transmit and receive descriptors.
    112 	 */
    113 	struct epic_descsoft sc_txsoft[EPIC_NTXDESC];
    114 	struct epic_descsoft sc_rxsoft[EPIC_NRXDESC];
    115 
    116 	/*
    117 	 * Control data structures.
    118 	 */
    119 	struct epic_control_data *sc_control_data;
    120 
    121 	int	sc_txpending;		/* number of TX requests pending */
    122 	int	sc_txdirty;		/* first dirty TX descriptor */
    123 	int	sc_txlast;		/* last used TX descriptor */
    124 
    125 	int	sc_rxptr;		/* next ready RX descriptor */
    126 };
    127 
    128 #ifdef _KERNEL
    129 void	epic_attach __P((struct epic_softc *));
    130 int	epic_intr __P((void *));
    131 #endif /* _KERNEL */
    132 
    133 #endif /* _DEV_IC_SMC83C170VAR_H_ */
    134