The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/esiopvar.h

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    1 /*      $NetBSD: esiopvar.h,v 1.15 2006/02/16 20:17:16 perry Exp $      */
    2 
    3 /*
    4  * Copyright (c) 2002 Manuel Bouyer.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   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. All advertising materials mentioning features or use of this software
   15  *    must display the following acknowledgement:
   16  *      This product includes software developed by Manuel Bouyer.
   17  * 4. The name of the author may not be used to endorse or promote products
   18  *    derived from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   30  *
   31  */
   32 
   33 /* structure and definitions for the siop driver */
   34 
   35 /* Number of tag */
   36 #define ESIOP_NTAG 256
   37 
   38 /*
   39  * description of a command scheduler slot. The script uses a ring of
   40  * A_ncmd_slots of this.
   41  */
   42 struct esiop_slot {
   43         u_int32_t dsa; /* DSA of the xfer. The first 2 bits holds flags */
   44 } __attribute__((__packed__));
   45 
   46 #define CMD_SLOTSIZE (sizeof(struct esiop_slot) / sizeof(u_int32_t))
   47 
   48 /*
   49  * xfer description of the script: tables and reselect script
   50  * In struct siop_common_cmd siop_xfer will point to this.
   51  * If you change this don't forget to update o_cmd_* and cmd_slot_size in script
   52  */
   53 struct esiop_xfer {
   54         struct siop_common_xfer siop_tables;
   55         u_int32_t tlq; /* target/lun/tag loaded in scratchC by script */
   56         u_int32_t saved_offset;/* contains scratchA if script saved an offset */
   57 } __attribute__((__packed__));
   58 
   59 #define ESIOP_XFER(cmd, m) (((struct esiop_xfer *)((cmd)->cmd_tables))->m)
   60 
   61 /*
   62  * This describes a command handled by the SCSI controller
   63  * These are chained in either a free list or a active list
   64  * We have one queue per target
   65  */
   66 
   67 struct esiop_cmd {
   68         TAILQ_ENTRY (esiop_cmd) next;
   69         struct siop_common_cmd cmd_c;
   70         struct esiop_cbd *esiop_cbdp; /* pointer to our siop_cbd */
   71 };
   72 #define cmd_tables cmd_c.siop_tables
   73 
   74 /* command block descriptors: an array of siop_cmd + an array of siop_xfer */
   75 struct esiop_cbd {
   76         TAILQ_ENTRY (esiop_cbd) next;
   77         struct esiop_cmd *cmds;
   78         struct esiop_xfer *xfers;
   79         bus_dmamap_t xferdma; /* DMA map for this block of xfers */
   80 };
   81 
   82 TAILQ_HEAD(cmd_list, esiop_cmd);
   83 TAILQ_HEAD(cbd_list, esiop_cbd);
   84 
   85 /* DSA table descriptor for tags. Free tables are in a list */
   86 struct esiop_dsatbl {
   87         TAILQ_ENTRY (esiop_dsatbl) next;
   88         u_int32_t *tbl; /* the table itself */
   89         u_int32_t tbl_dsa; /* DSA of base of this table */
   90         bus_addr_t tbl_offset; /* offset of this table in the map */
   91         struct esiop_dsatblblk *tblblk; /* pointer back to our block */
   92 };
   93 
   94 /* DSA table block descriptor. */
   95 struct esiop_dsatblblk {
   96         TAILQ_ENTRY (esiop_dsatblblk) next;
   97         bus_dmamap_t blkmap; /* DMA map of this block */
   98 };
   99 
  100 TAILQ_HEAD(tbl_list, esiop_dsatbl);
  101 TAILQ_HEAD(tblblk_list, esiop_dsatblblk);
  102 
  103 /* Number of table per block */
  104 #define ESIOP_NTPB ((PAGE_SIZE) / (sizeof(u_int32_t) * ESIOP_NTAG))
  105 
  106 /* per lun struct */
  107 struct esiop_lun {
  108         struct esiop_cmd *active; /* active non-tagged command */
  109         struct esiop_cmd *tactive[ESIOP_NTAG]; /* active tagged commands */
  110         int lun_flags; /* per-lun flags */
  111         struct esiop_dsatbl *lun_tagtbl; /* the tag DSA table */
  112 };
  113 
  114 /*
  115  * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
  116  * will point to this
  117  */
  118 struct esiop_target {
  119         struct siop_common_target target_c;
  120         struct esiop_lun *esiop_lun[8]; /* per-lun state */
  121         u_int32_t lun_table_offset; /* pointer to our DSA table */
  122 };
  123 
  124 static __inline void esiop_table_sync(struct esiop_cmd *, int);
  125 static __inline void
  126 esiop_table_sync(esiop_cmd, ops)
  127         struct esiop_cmd *esiop_cmd;
  128         int ops;
  129 {
  130         struct siop_common_softc *sc  = esiop_cmd->cmd_c.siop_sc;
  131         bus_addr_t offset;
  132 
  133         offset = esiop_cmd->cmd_c.dsa -
  134             esiop_cmd->esiop_cbdp->xferdma->dm_segs[0].ds_addr;
  135         bus_dmamap_sync(sc->sc_dmat, esiop_cmd->esiop_cbdp->xferdma, offset,
  136             sizeof(struct esiop_xfer), ops);
  137 }
  138 
  139 
  140 
  141 /* Driver internal state */
  142 struct esiop_softc {
  143         struct siop_common_softc sc_c;
  144         u_int32_t sc_semoffset;         /* semaphore */
  145         u_int32_t sc_shedoffset;        /* base of scheduler ring */
  146         int sc_currschedslot;           /* current scheduler slot */
  147         struct cbd_list cmds;           /* list of command block descriptors */
  148         struct cmd_list free_list;      /* cmd descr free list */
  149         struct tbl_list free_tagtbl;    /* list of free tag DSA tables */
  150         struct tblblk_list tag_tblblk;  /* tag DSA table blocks */
  151         u_int32_t sc_flags;
  152         u_int32_t sc_free_offset;       /* pointer to free RAM */
  153         u_int32_t sc_target_table_offset;/* pointer to target DSA table */
  154         int sc_currdoneslot;            /* current done slot */
  155         bus_dmamap_t sc_done_map;       /* dma map for done ring (shared) */
  156         bus_addr_t sc_done_offset;      /* offset of ring in sc_done_map */
  157         u_int32_t *sc_done_slot;        /* The done ring itself */
  158 };
  159 
  160 /* defs for sc_flags */
  161 #define SCF_CHAN_NOSLOT 0x0001          /* channel out of scheduler slot */
  162 #define SCF_CHAN_ADAPTREQ 0x0002        /* esiop_scsipi_request() is running */
  163 
  164 void    esiop_attach(struct esiop_softc *);
  165 int     esiop_intr(void *);
  166 void    esiop_add_dev(struct esiop_softc *, int, int);
  167 void    esiop_del_dev(struct esiop_softc *, int, int);

Cache object: 5cd239328a8f07643812a5918722ba4c


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