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ncr5380var.h revision 1.1 
      1 /*	$NetBSD: ncr5380var.h,v 1.1 1996/02/22 21:07:12 leo Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Leo Weppelman.
      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  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Leo Weppelman.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef _NCR5380VAR_H
     34 #define _NCR5380VAR_H
     35 
     36 struct	ncr_softc {
     37 	struct	device		sc_dev;
     38 	struct	scsi_link	sc_link;
     39 
     40 	/*
     41 	 * Some (pre-SCSI2) devices don't support select with ATN.
     42 	 * If the device responds to select with ATN by going into
     43 	 * command phase (ignoring ATN), then we flag it in the
     44 	 * following bitmask.
     45 	 * We also keep track of which devices have been selected
     46 	 * before.  This allows us to not even try raising ATN if
     47 	 * the target doesn't respond to it the first time.
     48 	 */
     49 	u_int8_t	sc_noselatn;
     50 	u_int8_t	sc_selected;
     51 };
     52 
     53 /*
     54  * Max. number of dma-chains per request
     55  */
     56 #define	MAXDMAIO	(MAXPHYS/NBPG + 1)
     57 
     58 /*
     59  * Some requests are not contiguous in physical memory. We need to break them
     60  * up into contiguous parts for DMA.
     61  */
     62 struct dma_chain {
     63 	u_int	dm_count;
     64 	u_long	dm_addr;
     65 };
     66 
     67 /*
     68  * Define our issue, free and disconnect queue's.
     69  */
     70 typedef struct	req_q {
     71     struct req_q	*next;	    /* next in free, issue or discon queue  */
     72     struct req_q	*link;	    /* next linked command to execute       */
     73     struct scsi_xfer	*xs;	    /* request from high-level driver       */
     74     u_short		dr_flag;    /* driver state			    */
     75     u_char		phase;	    /* current SCSI phase		    */
     76     u_char		msgout;	    /* message to send when requested       */
     77     u_char		targ_id;    /* target for command		    */
     78     u_char		targ_lun;   /* lun for command			    */
     79     u_char		status;	    /* returned status byte		    */
     80     u_char		message;    /* returned message byte		    */
     81     u_char		*bounceb;   /* allocated bounce buffer		    */
     82     u_char		*bouncerp;  /* bounce read-pointer		    */
     83     struct dma_chain	dm_chain[MAXDMAIO];
     84     struct dma_chain	*dm_cur;    /* current dma-request		    */
     85     struct dma_chain	*dm_last;   /* last dma-request			    */
     86     long		xdata_len;  /* length of transfer		    */
     87     u_char		*xdata_ptr; /* virtual address of transfer	    */
     88     struct scsi_generic	xcmd;	    /* command to execute		    */
     89 } SC_REQ;
     90 
     91 /*
     92  * Values for dr_flag:
     93  */
     94 #define	DRIVER_IN_DMA	0x01	/* Non-polled DMA activated		*/
     95 #define	DRIVER_AUTOSEN	0x02	/* Doing automatic sense		*/
     96 #define	DRIVER_NOINT	0x04	/* We are booting: no interrupts	*/
     97 #define	DRIVER_DMAOK	0x08	/* DMA can be used on this request	*/
     98 #define	DRIVER_BOUNCING	0x10	/* Using the bounce buffer		*/
     99 #define DRIVER_LINKCHK	0x20	/* Doing the linked command check	*/
    100 
    101 static SC_REQ	*issue_q   = NULL;	/* Commands waiting to be issued*/
    102 static SC_REQ	*discon_q  = NULL;	/* Commands disconnected	*/
    103 static SC_REQ	*connected = NULL;	/* Command currently connected	*/
    104 
    105 /*
    106  * Various debug definitions
    107  */
    108 #ifdef DBG_NOSTATIC
    109 #	define	static
    110 #endif
    111 #ifdef DBG_SEL
    112 #	define	DBG_SELPRINT(a,b)	printf(a,b)
    113 #else
    114 #	define DBG_SELPRINT(a,b)
    115 #endif
    116 #ifdef DBG_PIO
    117 #	define DBG_PIOPRINT(a,b,c) 	printf(a,b,c)
    118 #else
    119 #	define DBG_PIOPRINT(a,b,c)
    120 #endif
    121 #ifdef DBG_INF
    122 #	define DBG_INFPRINT(a,b,c)	a(b,c)
    123 #else
    124 #	define DBG_INFPRINT(a,b,c)
    125 #endif
    126 #ifdef DBG_PID
    127 	/* static	char	*last_hit = NULL, *olast_hit = NULL; */
    128 	static char *last_hit[DBG_PID];
    129 #	define	PID(a)	\
    130 	{ int i; \
    131 	  for (i=0; i< DBG_PID-1; i++) \
    132 		last_hit[i] = last_hit[i+1]; \
    133 	  last_hit[DBG_PID-1] = a; } \
    134 		/* olast_hit = last_hit; last_hit = a; */
    135 #else
    136 #	define	PID(a)
    137 #endif
    138 
    139 #endif /* _NCR5380VAR_H */
    140