sys/dev/disk/ata/ata-disk.h

   1 /*-
   2  * Copyright (c) 1998,1999,2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    without modification, immediately at the beginning of the file.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/dev/ata/ata-disk.h,v 1.22.2.7 2002/03/18 08:37:33 sos Exp $
  29  * $DragonFly: src/sys/dev/disk/ata/ata-disk.h,v 1.8 2007/05/15 20:29:16 dillon Exp $
  30  */
  31
  32 /* structure describing an ATA disk request */
  33 struct ad_request {
  34     struct ad_softc             *softc;         /* ptr to parent device */
  35     u_int64_t                   blockaddr;      /* block number */
  36     u_int32_t                   bytecount;      /* bytes to transfer */
  37     u_int32_t                   donecount;      /* bytes transferred */
  38     u_int32_t                   currentsize;    /* size of current transfer */
  39     struct callout              callout;        /* handle for timeout */
  40     int                         retries;        /* retry count */
  41     int                         flags;
  42 #define         ADR_F_READ              0x0001
  43 #define         ADR_F_ERROR             0x0002
  44 #define         ADR_F_DMA_USED          0x0004
  45 #define         ADR_F_QUEUED            0x0008
  46 #define         ADR_F_FORCE_PIO         0x0010
  47
  48     caddr_t                     data;           /* pointer to data buf */
  49     struct bio                  *bio;           /* associated bio ptr */
  50     u_int8_t                    tag;            /* tag ID of this request */
  51     int                         serv;           /* request had service */
  52     TAILQ_ENTRY(ad_request)     chain;          /* list management */
  53 };
  54
  55 /* structure describing an ATA disk */
  56 struct ad_softc {
  57     struct ata_device           *device;        /* ptr to device softc */
  58     int                         lun;            /* logical unit number */
  59     u_int64_t                   total_secs;     /* total # of sectors (LBA) */
  60     u_int8_t                    heads;
  61     u_int8_t                    sectors;
  62     u_int32_t                   transfersize;   /* size of each transfer */
  63     int                         num_tags;       /* number of tags supported */
  64     int                         flags;          /* drive flags */
  65 #define         AD_F_LABELLING          0x0001
  66 #define         AD_F_CHS_USED           0x0002
  67 #define         AD_F_32B_ENABLED        0x0004
  68 #define         AD_F_TAG_ENABLED        0x0008
  69 #define         AD_F_RAID_SUBDISK       0x0010
  70
  71     struct ad_request           *tags[32];      /* tag array of requests */
  72     int                         outstanding;    /* tags not serviced yet */
  73     struct bio_queue_head       bio_queue;      /* head of request queue */
  74     struct devstat              stats;          /* devstat entry */
  75     struct disk                 disk;           /* disklabel/slice stuff */
  76     cdev_t                      dev;            /* device place holder */
  77 };
  78
  79 void ad_attach(struct ata_device *, int);
  80 void ad_detach(struct ata_device *, int);
  81 void ad_reinit(struct ata_device *);
  82 void ad_start(struct ata_device *);
  83 int ad_transfer(struct ad_request *);
  84 int ad_interrupt(struct ad_request *);
  85 int ad_service(struct ad_softc *, int);
  86 void ad_print(struct ad_softc *);