ida_disk.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 1999,2000 Jonathan Lemon
    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  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD$
   29  */
   30 
   31 /*
   32  * Disk driver for Compaq SMART RAID adapters.
   33  */
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/kernel.h>
   38 #include <sys/module.h>
   39 
   40 #include <sys/bio.h>
   41 #include <sys/bus.h>
   42 #include <sys/conf.h>
   43 #include <sys/cons.h>
   44 #include <sys/lock.h>
   45 #include <sys/mutex.h>
   46 
   47 #include <machine/bus.h>
   48 #include <sys/rman.h>
   49 
   50 #include <vm/vm.h>
   51 #include <vm/pmap.h>
   52 #include <machine/md_var.h>
   53 
   54 #include <geom/geom_disk.h>
   55 
   56 #include <dev/ida/idareg.h>
   57 #include <dev/ida/idavar.h>
   58 
   59 /* prototypes */
   60 static int idad_probe(device_t dev);
   61 static int idad_attach(device_t dev);
   62 static int idad_detach(device_t dev);
   63 
   64 static  d_strategy_t    idad_strategy;
   65 static  dumper_t        idad_dump;
   66 
   67 static device_method_t idad_methods[] = {
   68         DEVMETHOD(device_probe,         idad_probe),
   69         DEVMETHOD(device_attach,        idad_attach),
   70         DEVMETHOD(device_detach,        idad_detach),
   71         { 0, 0 }
   72 };
   73 
   74 static driver_t idad_driver = {
   75         "idad",
   76         idad_methods,
   77         sizeof(struct idad_softc)
   78 };
   79 
   80 DRIVER_MODULE(idad, ida, idad_driver, 0, 0);
   81 
   82 /*
   83  * Read/write routine for a buffer.  Finds the proper unit, range checks
   84  * arguments, and schedules the transfer.  Does not wait for the transfer
   85  * to complete.  Multi-page transfers are supported.  All I/O requests must
   86  * be a multiple of a sector in length.
   87  */
   88 static void
   89 idad_strategy(struct bio *bp)
   90 {
   91         struct idad_softc *drv;
   92 
   93         drv = bp->bio_disk->d_drv1;
   94         if (drv == NULL) {
   95                 bp->bio_error = EINVAL;
   96                 goto bad;
   97         }
   98 
   99         /*
  100          * software write protect check
  101          */
  102         if (drv->flags & DRV_WRITEPROT && (bp->bio_cmd == BIO_WRITE)) {
  103                 bp->bio_error = EROFS;
  104                 goto bad;
  105         }
  106 
  107         if ((bp->bio_cmd != BIO_READ) && (bp->bio_cmd != BIO_WRITE)) {
  108                 bp->bio_error = EOPNOTSUPP;
  109                 goto bad;
  110         }
  111 
  112         bp->bio_driver1 = drv;
  113         ida_submit_buf(drv->controller, bp);
  114         return;
  115 
  116 bad:
  117         bp->bio_flags |= BIO_ERROR;
  118 
  119         /*
  120          * Correctly set the buf to indicate a completed transfer
  121          */
  122         bp->bio_resid = bp->bio_bcount;
  123         biodone(bp);
  124         return;
  125 }
  126 
  127 static int
  128 idad_dump(void *arg, void *virtual, off_t offset, size_t length)
  129 {
  130 
  131         struct idad_softc *drv;
  132         int error = 0;
  133         struct disk *dp;
  134 
  135         dp = arg;
  136         drv = dp->d_drv1;
  137         if (drv == NULL)
  138                 return (ENXIO);
  139 
  140         drv->controller->flags &= ~IDA_INTERRUPTS;
  141 
  142         if (length > 0) {
  143                 error = ida_command(drv->controller, CMD_WRITE, virtual,
  144                     length, drv->drive, offset / DEV_BSIZE, DMA_DATA_OUT);
  145         }
  146         drv->controller->flags |= IDA_INTERRUPTS;
  147         return (error);
  148 }
  149 
  150 void
  151 idad_intr(struct bio *bp)
  152 {
  153 
  154         if (bp->bio_flags & BIO_ERROR)
  155                 bp->bio_error = EIO;
  156         else
  157                 bp->bio_resid = 0;
  158 
  159         biodone(bp);
  160 }
  161 
  162 static int
  163 idad_probe(device_t dev)
  164 {
  165 
  166         device_set_desc(dev, "Compaq Logical Drive");
  167         return (0);
  168 }
  169 
  170 static int
  171 idad_attach(device_t dev)
  172 {
  173         struct ida_drive_info dinfo;
  174         struct idad_softc *drv;
  175         device_t parent;
  176         int error;
  177 
  178         drv = (struct idad_softc *)device_get_softc(dev);
  179         parent = device_get_parent(dev);
  180         drv->dev = dev;
  181         drv->controller = (struct ida_softc *)device_get_softc(parent);
  182         drv->unit = device_get_unit(dev);
  183         drv->drive = (intptr_t)device_get_ivars(dev);
  184 
  185         mtx_lock(&drv->controller->lock);
  186         error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO,
  187             &dinfo, sizeof(dinfo), drv->drive, 0, DMA_DATA_IN);
  188         mtx_unlock(&drv->controller->lock);
  189         if (error) {
  190                 device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n");
  191                 return (ENXIO);
  192         }
  193 
  194         drv->cylinders = dinfo.dp.ncylinders;
  195         drv->heads = dinfo.dp.nheads;
  196         drv->sectors = dinfo.dp.nsectors;
  197         drv->secsize = dinfo.secsize == 0 ? 512 : dinfo.secsize;
  198         drv->secperunit = dinfo.secperunit;
  199 
  200         /* XXX
  201          * other initialization
  202          */
  203         device_printf(dev, "%uMB (%u sectors), blocksize=%d\n",
  204             drv->secperunit / ((1024 * 1024) / drv->secsize),
  205             drv->secperunit, drv->secsize);
  206 
  207         drv->disk = disk_alloc();
  208         drv->disk->d_strategy = idad_strategy;
  209         drv->disk->d_name = "idad";
  210         drv->disk->d_dump = idad_dump;
  211         drv->disk->d_sectorsize = drv->secsize;
  212         drv->disk->d_mediasize = (off_t)drv->secperunit * drv->secsize;
  213         drv->disk->d_fwsectors = drv->sectors;
  214         drv->disk->d_fwheads = drv->heads;
  215         drv->disk->d_drv1 = drv;
  216         drv->disk->d_maxsize = DFLTPHYS;                /* XXX guess? */
  217         drv->disk->d_unit = drv->unit;
  218         disk_create(drv->disk, DISK_VERSION);
  219 
  220         return (0);
  221 }
  222 
  223 static int
  224 idad_detach(device_t dev)
  225 {
  226         struct idad_softc *drv;
  227 
  228         drv = (struct idad_softc *)device_get_softc(dev);
  229         disk_destroy(drv->disk);
  230         return (0);
  231 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/ida/ida_disk.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ida/ida_disk.c