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/osiopvar.h

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    1 /*      $NetBSD: osiopvar.h,v 1.13 2008/05/14 13:29:28 tsutsui Exp $    */
    2 
    3 /*-
    4  * Copyright (c) 2001 Izumi Tsutsui.  All rights reserved.
    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  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 /*
   28  * Copyright (c) 1990 The Regents of the University of California.
   29  * All rights reserved.
   30  *
   31  * This code is derived from software contributed to Berkeley by
   32  * Van Jacobson of Lawrence Berkeley Laboratory.
   33  *
   34  * Redistribution and use in source and binary forms, with or without
   35  * modification, are permitted provided that the following conditions
   36  * are met:
   37  * 1. Redistributions of source code must retain the above copyright
   38  *    notice, this list of conditions and the following disclaimer.
   39  * 2. Redistributions in binary form must reproduce the above copyright
   40  *    notice, this list of conditions and the following disclaimer in the
   41  *    documentation and/or other materials provided with the distribution.
   42  * 3. Neither the name of the University nor the names of its contributors
   43  *    may be used to endorse or promote products derived from this software
   44  *    without specific prior written permission.
   45  *
   46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   56  * SUCH DAMAGE.
   57  *
   58  *      @(#)siopvar.h   7.1 (Berkeley) 5/8/90
   59  */
   60 
   61 #define osiop_read_1(sc, reg)                                   \
   62     bus_space_read_1((sc)->sc_bst, (sc)->sc_reg, reg)
   63 #define osiop_write_1(sc, reg, val)                             \
   64     bus_space_write_1((sc)->sc_bst, (sc)->sc_reg, reg, val)
   65 
   66 #define osiop_read_4(sc, reg)                                   \
   67     bus_space_read_4((sc)->sc_bst, (sc)->sc_reg, reg)
   68 #define osiop_write_4(sc, reg, val)                             \
   69     bus_space_write_4((sc)->sc_bst, (sc)->sc_reg, reg, val)
   70 
   71 /*
   72  * The largest single request will be MAXPHYS bytes which will require
   73  * at most MAXPHYS/NBPG+1 chain elements to describe, i.e. if none of
   74  * the buffer pages are physically contiguous (MAXPHYS/NBPG) and the
   75  * buffer is not page aligned (+1).
   76  */
   77 /* XXX This should be (MAXPHYS / NBPG + 1), but hardcoded in script */
   78 #define OSIOP_NSG       (16 + 1)
   79 #if MAXPHYS > (PAGE_SIZE * (OSIOP_NSG - 1))
   80 #define OSIOP_MAX_XFER  (PAGE_SIZE * (OSIOP_NSG - 1))
   81 #else
   82 #define OSIOP_MAX_XFER  MAXPHYS
   83 #endif
   84 
   85 #define OSIOP_NTGT 8
   86 #define OSIOP_NACB 32   /* XXX (PAGE_SIZE / sizeof(osiop_ds)) is better? */
   87 
   88 /*
   89  * Data Structure for SCRIPTS program
   90  */
   91 typedef struct buf_table {
   92         uint32_t count;
   93         uint32_t addr;
   94 } buf_table_t;
   95 
   96 struct osiop_ds {
   97         uint32_t scsi_addr;             /*   0: SCSI ID & sync */
   98         uint32_t pad1;                  /*   4: padding */
   99         buf_table_t id;                 /*   8: Identify message */
  100         buf_table_t cmd;                /*  16: SCSI command */
  101         buf_table_t status;             /*  24: Status */
  102         buf_table_t msg;                /*  32: Message */
  103         buf_table_t msgin;              /*  40: Message in */
  104         buf_table_t extmsg;             /*  48: Extended message in */
  105         buf_table_t synmsg;             /*  56: Sync transfer request */
  106         buf_table_t data[OSIOP_NSG];    /*  64: DMA S/G buffers */
  107                                         /*      (8 * OSIOP_NSG == 136bytes) */
  108         uint8_t scsipi_cmd[16];         /* 200: cmd buf */
  109         uint8_t msgout[8];              /* 216: message out buf */
  110         uint8_t msgbuf[8];              /* 224: message in buf */
  111         uint8_t stat[8];                /* 232: stat buf */
  112         uint8_t pad2[16];               /* 240: padding to 256bytes */
  113 } __packed;
  114 
  115 /* status can hold the SCSI_* status values, and 2 additional values: */
  116 #define SCSI_OSIOP_NOCHECK      0xfe    /* don't check the scsi status */
  117 #define SCSI_OSIOP_NOSTATUS     0xff    /* device didn't report status */
  118 
  119 #define MSG_INVALID             0xff    /* dummy value for message buffer */
  120 
  121 #define OSIOP_DSOFF(x)          offsetof(struct osiop_ds, x)
  122 #define OSIOP_DSCMDOFF          OSIOP_DSOFF(scsipi_cmd[0])
  123 #define OSIOP_DSIDOFF           OSIOP_DSOFF(msgout[0])
  124 #define OSIOP_DSMSGOFF          OSIOP_DSOFF(msgbuf[0])
  125 #define OSIOP_DSMSGINOFF        OSIOP_DSOFF(msgbuf[1])
  126 #define OSIOP_DSEXTMSGOFF       OSIOP_DSOFF(msgbuf[2])
  127 #define OSIOP_DSSYNMSGOFF       OSIOP_DSOFF(msgbuf[3])
  128 #define OSIOP_DSSTATOFF         OSIOP_DSOFF(stat[0])
  129 
  130 /*
  131  * ACB. Holds additional information for each SCSI command Comments:
  132  * Basicly, we refrain from fiddling with the scsi_xfer struct
  133  * (except do the expected updating of return values).
  134  * We'll generally update: xs->{flags,resid,error,status} and
  135  * occasionally xs->retries.
  136  */
  137 struct osiop_acb {
  138         TAILQ_ENTRY(osiop_acb) chain;
  139         struct scsipi_xfer *xs; /* SCSI xfer ctrl block from upper layer */
  140         struct osiop_softc *sc; /* points back to our adapter */
  141 
  142         bus_dmamap_t datadma;   /* DMA map for data transfer */
  143 
  144         struct osiop_ds *ds;    /* data structure for this acb */
  145         bus_size_t dsoffset;    /* offset of data structure for this acb */
  146 
  147         bus_size_t cmdlen;      /* command length */
  148         bus_size_t datalen;     /* transfer data length */
  149 #ifdef OSIOP_DEBUG
  150         void *data;             /* transfer data buffer ptr */
  151 #endif
  152 
  153         bus_addr_t curaddr;     /* current transfer data buffer */
  154         bus_size_t curlen;      /* current transfer data length */
  155 
  156         int status;             /* status of this acb */
  157 /* status defs */
  158 #define ACB_S_FREE      0       /* cmd slot is free */
  159 #define ACB_S_READY     1       /* cmd slot is waiting for processing */
  160 #define ACB_S_ACTIVE    2       /* cmd slot is being processed */
  161 #define ACB_S_DONE      3       /* cmd slot has been processed */
  162 
  163         int flags;              /* cmd slot flags */
  164 #define ACB_F_TIMEOUT   0x01    /* command timeout */
  165 
  166         uint8_t intstat;        /* buffer to save sc_flags on disconnect */
  167 };
  168 
  169 /*
  170  * Some info about each (possible) target on the SCSI bus.  This should
  171  * probably have been a "per target+lunit" structure, but we'll leave it at
  172  * this for now.  Is there a way to reliably hook it up to sc->fordriver??
  173  */
  174 struct osiop_tinfo {
  175         int cmds;               /* number of commands processed */
  176         int dconns;             /* number of disconnects */
  177         int touts;              /* number of timeouts */
  178         int perrs;              /* number of parity errors */
  179         int lubusy;             /* What local units/subr. are busy? */
  180         int period;             /* Period suggestion */
  181         int offset;             /* Offset suggestion */
  182         int flags;              /* misc flags per each target */
  183 #define TI_NOSYNC       0x01    /* disable sync xfer on this target */
  184 #define TI_NODISC       0x02    /* disable disconnect on this target */
  185         int state;              /* negotiation state */
  186         uint8_t sxfer;          /* value for SXFER reg */
  187         uint8_t sbcl;           /* value for SBCL reg */
  188 };
  189 
  190 struct osiop_softc {
  191         device_t sc_dev;
  192 
  193         bus_space_tag_t sc_bst;         /* bus space tag */
  194         bus_space_handle_t sc_reg;      /* register I/O handle */
  195 
  196         bus_dma_tag_t sc_dmat;          /* bus dma tag */
  197         bus_dmamap_t sc_scrdma;         /* script dma map */
  198         bus_dmamap_t sc_dsdma;          /* script data dma map */
  199 
  200         uint32_t *sc_script;            /* ptr to script memory */
  201         struct osiop_ds *sc_ds;         /* ptr to data structure memory */
  202 
  203         int sc_id;                      /* adapter SCSI id */
  204         int sc_active;                  /* number of active I/O's */
  205 
  206         struct osiop_acb *sc_nexus;     /* current command */
  207         struct osiop_acb *sc_acb;       /* the real command blocks */
  208 
  209         /* Lists of command blocks */
  210         TAILQ_HEAD(acb_list, osiop_acb) free_list,
  211                                         ready_list,
  212                                         nexus_list;
  213 
  214         struct scsipi_adapter sc_adapter;
  215         struct scsipi_channel sc_channel;
  216 
  217         struct osiop_tinfo sc_tinfo[OSIOP_NTGT];
  218 
  219         int sc_clock_freq;
  220         int sc_tcp[4];
  221         int sc_flags;
  222 #define OSIOP_INTSOFF   0x80    /* Interrupts turned off */
  223 #define OSIOP_INTDEFER  0x40    /* MD interrupt has been deferred */
  224 #define OSIOP_NODMA     0x02    /* No DMA transfer */
  225 #define OSIOP_ALIVE     0x01    /* controller initialized */
  226 
  227         int sc_cfflags;                 /* copy of config flags */
  228 
  229         int sc_minsync;
  230 
  231         uint8_t sc_dstat;
  232         uint8_t sc_sstat0;
  233         uint8_t sc_sstat1;
  234         uint8_t sc_istat;
  235         uint8_t sc_dcntl;
  236         uint8_t sc_ctest4;
  237         uint8_t sc_ctest7;
  238         uint8_t sc_sien;
  239         uint8_t sc_dien;
  240 };
  241 
  242 /* negotiation states */
  243 #define NEG_INIT        0       /* Initial negotiate state */
  244 #define NEG_SYNC        NEG_INIT /* Negotiate synch transfers */
  245 #define NEG_WAITS       1       /* Waiting for synch negotiation response */
  246 #define NEG_DONE        2       /* Wide and/or sync negotiation done */
  247 
  248 void osiop_attach(struct osiop_softc *);
  249 void osiop_intr(struct osiop_softc *);

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