ips_disk.c

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    1 /*-
    2  * Written by: David Jeffery
    3  * Copyright (c) 2002 Adaptec Inc.
    4  * 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 AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD: src/sys/dev/ips/ips_disk.c,v 1.4 2003/09/22 04:59:07 njl Exp $
   28  */
   29 
   30 #include <sys/devicestat.h>
   31 #include <dev/raid/ips/ips.h>
   32 #include <dev/raid/ips/ips_disk.h>
   33 #include <sys/stat.h>
   34 #include <sys/dtype.h>
   35 
   36 #include <vm/vm.h>
   37 #include <vm/pmap.h>
   38 #include <machine/md_var.h>
   39 
   40 static int ipsd_probe(device_t dev);
   41 static int ipsd_attach(device_t dev);
   42 static int ipsd_detach(device_t dev);
   43 
   44 static void ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs,
   45                              int error);
   46 static void ipsd_dump_block_complete(ips_command_t *command);
   47 
   48 static d_open_t ipsd_open;
   49 static d_close_t ipsd_close;
   50 static d_strategy_t ipsd_strategy;
   51 static d_dump_t ipsd_dump;
   52 
   53 static struct dev_ops ipsd_ops = {
   54         { "ipsd", 0, D_DISK },
   55         .d_open =       ipsd_open,
   56         .d_close =      ipsd_close,
   57         .d_strategy =   ipsd_strategy,
   58         .d_read =       physread,
   59         .d_write =      physwrite,
   60         .d_dump =       ipsd_dump,
   61 };
   62 
   63 static device_method_t ipsd_methods[] = {
   64         DEVMETHOD(device_probe,         ipsd_probe),
   65         DEVMETHOD(device_attach,        ipsd_attach),
   66         DEVMETHOD(device_detach,        ipsd_detach),
   67         DEVMETHOD_END
   68 };
   69 
   70 
   71 static driver_t ipsd_driver = {
   72         "ipsd",
   73         ipsd_methods,
   74         sizeof(ipsdisk_softc_t)
   75 };
   76 
   77 static devclass_t ipsd_devclass;
   78 DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, NULL, NULL);
   79 
   80 /*
   81  * handle opening of disk device.  It must set up all information about
   82  * the geometry and size of the disk
   83  */
   84 static int
   85 ipsd_open(struct dev_open_args *ap)
   86 {
   87         cdev_t dev = ap->a_head.a_dev;
   88         ipsdisk_softc_t *dsc = dev->si_drv1;
   89 
   90         if (dsc == NULL)
   91                 return (ENXIO);
   92         dsc->state |= IPS_DEV_OPEN;
   93         DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
   94         return 0;
   95 }
   96 
   97 static int
   98 ipsd_close(struct dev_close_args *ap)
   99 {
  100         cdev_t dev = ap->a_head.a_dev;
  101         ipsdisk_softc_t *dsc = dev->si_drv1;
  102 
  103         dsc->state &= ~IPS_DEV_OPEN;
  104         DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
  105         return 0;
  106 }
  107 
  108 /* ipsd_finish is called to clean up and return a completed IO request */
  109 void
  110 ipsd_finish(struct bio *bio)
  111 {
  112         struct buf *bp = bio->bio_buf;
  113         ipsdisk_softc_t *dsc;
  114 
  115         dsc = bio->bio_driver_info;
  116         if (bp->b_flags & B_ERROR) {
  117                 device_printf(dsc->dev, "iobuf error %d\n", bp->b_error);
  118         } else {
  119                 bp->b_resid = 0;
  120         }
  121         devstat_end_transaction_buf(&dsc->stats, bp);
  122         biodone(bio);
  123         ips_start_io_request(dsc->sc);
  124 }
  125 
  126 
  127 static int
  128 ipsd_strategy(struct dev_strategy_args *ap)
  129 {
  130         cdev_t dev = ap->a_head.a_dev;
  131         struct bio *bio = ap->a_bio;
  132         ipsdisk_softc_t *dsc;
  133 
  134         dsc = dev->si_drv1;
  135         DEVICE_PRINTF(8, dsc->dev, "in strategy\n");
  136         bio->bio_driver_info = dsc;
  137         devstat_start_transaction(&dsc->stats);
  138         lockmgr(&dsc->sc->queue_lock, LK_EXCLUSIVE|LK_RETRY);
  139         bioqdisksort(&dsc->sc->bio_queue, bio);
  140         ips_start_io_request(dsc->sc);
  141         lockmgr(&dsc->sc->queue_lock, LK_RELEASE);
  142         return(0);
  143 }
  144 
  145 static int
  146 ipsd_probe(device_t dev)
  147 {
  148         DEVICE_PRINTF(2, dev, "in probe\n");
  149         device_set_desc(dev, "Logical Drive");
  150         return 0;
  151 }
  152 
  153 static int
  154 ipsd_attach(device_t dev)
  155 {
  156         device_t adapter;
  157         ipsdisk_softc_t *dsc;
  158         struct disk_info info;
  159         u_int totalsectors;
  160         u_int nheads, nsectors;
  161 
  162         DEVICE_PRINTF(2, dev, "in attach\n");
  163         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  164         bzero(dsc, sizeof(ipsdisk_softc_t));
  165         adapter = device_get_parent(dev);
  166         dsc->dev = dev;
  167         dsc->sc = device_get_softc(adapter);
  168         dsc->unit = device_get_unit(dev);
  169         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
  170         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
  171         if ((totalsectors > 0x400000) &&
  172             ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
  173                 nheads = IPS_NORM_HEADS;
  174                 nsectors = IPS_NORM_SECTORS;
  175         } else {
  176                 nheads = IPS_COMP_HEADS;
  177                 nsectors = IPS_COMP_SECTORS;
  178         }
  179         devstat_add_entry(&dsc->stats, "ipsd", dsc->unit, DEV_BSIZE,
  180                           DEVSTAT_NO_ORDERED_TAGS,
  181                           DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_SCSI,
  182                           DEVSTAT_PRIORITY_DISK);
  183         dsc->ipsd_dev_t = disk_create(dsc->unit, &dsc->ipsd_disk, &ipsd_ops);
  184         dsc->ipsd_dev_t->si_drv1 = dsc;
  185         dsc->ipsd_dev_t->si_iosize_max = IPS_MAX_IO_SIZE;
  186 
  187         bzero(&info, sizeof(info));
  188         info.d_media_blksize    = IPS_BLKSIZE;          /* mandatory */
  189         info.d_media_blocks     = totalsectors;
  190 
  191         info.d_type             = DTYPE_ESDI;           /* optional */
  192         info.d_nheads           = nheads;
  193         info.d_secpertrack      = nsectors;
  194         info.d_ncylinders       = totalsectors / nheads / nsectors;
  195         info.d_secpercyl        = nsectors / nheads;
  196 
  197         disk_setdiskinfo(&dsc->ipsd_disk, &info);
  198 
  199         device_printf(dev, "Logical Drive  (%dMB)\n",
  200             dsc->sc->drives[dsc->disk_number].sector_count >> 11);
  201         return 0;
  202 }
  203 
  204 static int
  205 ipsd_detach(device_t dev)
  206 {
  207         ipsdisk_softc_t *dsc;
  208 
  209         DEVICE_PRINTF(2, dev, "in detach\n");
  210         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  211         if (dsc->state & IPS_DEV_OPEN)
  212                 return (EBUSY);
  213         devstat_remove_entry(&dsc->stats);
  214         disk_destroy(&dsc->ipsd_disk);
  215         return 0;
  216 }
  217 
  218 
  219 static int
  220 ipsd_dump(struct dev_dump_args *ap)
  221 {
  222         cdev_t dev = ap->a_head.a_dev;
  223         ips_softc_t *sc;
  224         ips_command_t *command;
  225         ips_io_cmd *command_struct;
  226         ipsdisk_softc_t *dsc;
  227         off_t off;
  228         uint8_t *va;
  229         size_t len;
  230         int error = 0;
  231 
  232         dsc = dev->si_drv1;
  233         if (dsc == NULL)
  234                 return (EINVAL);
  235         sc = dsc->sc;
  236 
  237         if (ips_get_free_cmd(sc, &command, 0) != 0) {
  238                 kprintf("ipsd: failed to get cmd for dump\n");
  239                 return (ENOMEM);
  240         }
  241 
  242         command->data_dmatag = sc->sg_dmatag;
  243         command->callback = ipsd_dump_block_complete;
  244 
  245         command_struct = (ips_io_cmd *)command->command_buffer;
  246         command_struct->id = command->id;
  247         command_struct->drivenum = sc->drives[dsc->disk_number].drivenum;
  248 
  249         off = ap->a_offset;
  250         va = ap->a_virtual;
  251 
  252         size_t length = ap->a_length;
  253         while (length > 0) {
  254                 len = length > IPS_MAX_IO_SIZE ? IPS_MAX_IO_SIZE : length;
  255                 command_struct->lba = off / IPS_BLKSIZE;
  256                 if (bus_dmamap_load(command->data_dmatag, command->data_dmamap,
  257                     va, len, ipsd_dump_map_sg, command, 0) != 0) {
  258                         error = EIO;
  259                         break;
  260                 }
  261                 if (COMMAND_ERROR(&command->status)) {
  262                         error = EIO;
  263                         break;
  264                 }
  265 
  266                 length -= len;
  267                 off += len;
  268                 va += len;
  269         }
  270         ips_insert_free_cmd(command->sc, command);
  271         return(error);
  272 }
  273 
  274 static void
  275 ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
  276 {
  277         ips_softc_t *sc;
  278         ips_command_t *command;
  279         ips_sg_element_t *sg_list;
  280         ips_io_cmd *command_struct;
  281         int i, length;
  282 
  283         command = (ips_command_t *)arg;
  284         sc = command->sc;
  285         length = 0;
  286 
  287         if (error) {
  288                 kprintf("ipsd_dump_map_sg: error %d\n", error);
  289                 command->status.value = IPS_ERROR_STATUS;
  290                 return;
  291         }
  292 
  293         command_struct = (ips_io_cmd *)command->command_buffer;
  294 
  295         if (nsegs != 1) {
  296                 command_struct->segnum = nsegs;
  297                 sg_list = (ips_sg_element_t *)((uint8_t *)
  298                     command->command_buffer + IPS_COMMAND_LEN);
  299                 for (i = 0; i < nsegs; i++) {
  300                         sg_list[i].addr = segs[i].ds_addr;
  301                         sg_list[i].len = segs[i].ds_len;
  302                         length += segs[i].ds_len;
  303                 }
  304                 command_struct->buffaddr =
  305                     (uint32_t)command->command_phys_addr + IPS_COMMAND_LEN;
  306                 command_struct->command = IPS_SG_WRITE_CMD;
  307         } else {
  308                 command_struct->buffaddr = segs[0].ds_addr;
  309                 length = segs[0].ds_len;
  310                 command_struct->segnum = 0;
  311                 command_struct->command = IPS_WRITE_CMD;
  312         }
  313 
  314         length = (length + IPS_BLKSIZE - 1) / IPS_BLKSIZE;
  315         command_struct->length = length;
  316         bus_dmamap_sync(sc->command_dmatag, command->command_dmamap,
  317             BUS_DMASYNC_PREWRITE);
  318         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  319             BUS_DMASYNC_PREWRITE);
  320 
  321         sc->ips_issue_cmd(command);
  322         sc->ips_poll_cmd(command);
  323         return;
  324 }
  325 
  326 static void
  327 ipsd_dump_block_complete(ips_command_t *command)
  328 {
  329         if (COMMAND_ERROR(&command->status)) {
  330                 kprintf("ipsd_dump completion error= 0x%x\n",
  331                        command->status.value);
  332         }
  333         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  334             BUS_DMASYNC_POSTWRITE);
  335         bus_dmamap_unload(command->data_dmatag, command->data_dmamap);
  336 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/raid/ips/ips_disk.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/raid/ips/ips_disk.c
