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adw.h revision 1.13 
      1 /*      $NetBSD: adw.h,v 1.13 2005/02/27 00:27:00 perry Exp $        */
      2 
      3 /*
      4  * Generic driver definitions and exported functions for the Advanced
      5  * Systems Inc. SCSI controllers
      6  *
      7  * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
      8  * All rights reserved.
      9  *
     10  * Author: Baldassare Dante Profeta <dante (at) mclink.it>
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *        This product includes software developed by the NetBSD
     23  *        Foundation, Inc. and its contributors.
     24  * 4. Neither the name of The NetBSD Foundation nor the names of its
     25  *    contributors may be used to endorse or promote products derived
     26  *    from this software without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     29  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     31  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     32  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     38  * POSSIBILITY OF SUCH DAMAGE.
     39  */
     40 
     41 #ifndef _ADVANSYS_WIDE_H_
     42 #define _ADVANSYS_WIDE_H_
     43 
     44 /******************************************************************************/
     45 
     46 typedef int (* ADW_ISR_CALLBACK) (ADW_SOFTC *, ADW_SCSI_REQ_Q *);
     47 typedef void (* ADW_ASYNC_CALLBACK) (ADW_SOFTC *, u_int8_t);
     48 
     49 
     50 /*
     51  * per request scatter-gather element limit
     52  * We could have up to 256 SG lists.
     53  */
     54 #define ADW_MAX_SG_LIST		255
     55 
     56 /*
     57  * Scatter-Gather Definitions per request.
     58  */
     59 
     60 #define NO_OF_SG_PER_BLOCK	15
     61 
     62 /* Number of SG blocks needed. */
     63 #define ADW_NUM_SG_BLOCK \
     64 	((ADW_MAX_SG_LIST + (NO_OF_SG_PER_BLOCK - 1))/NO_OF_SG_PER_BLOCK)
     65 
     66 
     67 struct adw_ccb {
     68 	ADW_SCSI_REQ_Q		scsiq;
     69 	ADW_SG_BLOCK		sg_block[ADW_NUM_SG_BLOCK];
     70 
     71 	struct scsi_sense_data scsi_sense;
     72 
     73 	TAILQ_ENTRY(adw_ccb)	chain;
     74 	struct adw_ccb		*nexthash;
     75 	u_int32_t		hashkey;
     76 
     77 	struct scsipi_xfer	*xs;	/* the scsipi_xfer for this cmd */
     78 	int			flags;	/* see below */
     79 
     80 	int			timeout;
     81 	/*
     82 	 * This DMA map maps the buffer involved in the transfer.
     83 	 */
     84 	bus_dmamap_t		dmamap_xfer;
     85 };
     86 
     87 typedef struct adw_ccb ADW_CCB;
     88 
     89 /* flags for ADW_CCB */
     90 #define CCB_ALLOC	0x01
     91 #define CCB_ABORTING	0x02
     92 #define CCB_ABORTED	0x04
     93 
     94 
     95 #define ADW_MAX_CCB	63	/* Max. number commands per device (63) */
     96 
     97 struct adw_control {
     98 	ADW_CCB		ccbs[ADW_MAX_CCB];	/* all our control blocks */
     99 	ADW_CARRIER	*carriers;		/* all our carriers */
    100 };
    101 
    102 /*
    103  * Offset of a CCB from the beginning of the control DMA mapping.
    104  */
    105 #define	ADW_CCB_OFF(c)	(offsetof(struct adw_control, ccbs[0]) +	\
    106 		    (((u_long)(c)) - ((u_long)&sc->sc_control->ccbs[0])))
    107 
    108 /******************************************************************************/
    109 
    110 int adw_init(ADW_SOFTC *);
    111 void adw_attach(ADW_SOFTC *);
    112 int adw_intr(void *);
    113 ADW_CCB *adw_ccb_phys_kv(ADW_SOFTC *, u_int32_t);
    114 
    115 /******************************************************************************/
    116 
    117 #endif /* _ADVANSYS_ADW_H_ */
    118