sys/dev/raid/aac/aac_disk.c

   1 /*-
   2  * Copyright (c) 2000 Michael Smith
   3  * Copyright (c) 2001 Scott Long
   4  * Copyright (c) 2000 BSDi
   5  * Copyright (c) 2001 Adaptec, Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      $FreeBSD: src/sys/dev/aac/aac_disk.c,v 1.3.2.8 2003/01/11 18:39:39 scottl Exp $
  30  *      $DragonFly: src/sys/dev/raid/aac/aac_disk.c,v 1.17 2007/05/15 00:01:04 dillon Exp $
  31  */
  32
  33 #include "opt_aac.h"
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/sysctl.h>
  39
  40 #include "aac_compat.h"
  41 #include <sys/bus.h>
  42 #include <sys/conf.h>
  43 #include <sys/devicestat.h>
  44 #include <sys/disk.h>
  45 #include <sys/rman.h>
  46
  47 #include <vm/vm.h>
  48 #include <vm/pmap.h>
  49
  50 #include <machine/md_var.h>
  51
  52 #include "aacreg.h"
  53 #include "aac_ioctl.h"
  54 #include "aacvar.h"
  55
  56 /*
  57  * Interface to parent.
  58  */
  59 static int aac_disk_probe(device_t dev);
  60 static int aac_disk_attach(device_t dev);
  61 static int aac_disk_detach(device_t dev);
  62
  63 /*
  64  * Interface to the device switch.
  65  */
  66 static  d_open_t        aac_disk_open;
  67 static  d_close_t       aac_disk_close;
  68 static  d_strategy_t    aac_disk_strategy;
  69 static  d_dump_t        aac_disk_dump;
  70
  71 #define AAC_DISK_CDEV_MAJOR     151
  72
  73 static struct dev_ops aac_disk_ops = {
  74         { "aacd", AAC_DISK_CDEV_MAJOR, D_DISK },
  75         .d_open =               aac_disk_open,
  76         .d_close =              aac_disk_close,
  77         .d_read =               physread,
  78         .d_write =              physwrite,
  79         .d_strategy =           aac_disk_strategy,
  80         .d_dump =               aac_disk_dump,
  81 };
  82
  83 devclass_t              aac_disk_devclass;
  84
  85 static device_method_t aac_disk_methods[] = {
  86         DEVMETHOD(device_probe, aac_disk_probe),
  87         DEVMETHOD(device_attach,        aac_disk_attach),
  88         DEVMETHOD(device_detach,        aac_disk_detach),
  89         { 0, 0 }
  90 };
  91
  92 static driver_t aac_disk_driver = {
  93         "aacd",
  94         aac_disk_methods,
  95         sizeof(struct aac_disk)
  96 };
  97
  98 #define AAC_MAXIO       65536
  99
 100 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0);
 101
 102 /* sysctl tunables */
 103 static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */
 104 TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max);
 105
 106 SYSCTL_DECL(_hw_aac);
 107 SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RD, &aac_iosize_max, 0,
 108             "Max I/O size per transfer to an array");
 109
 110 /*
 111  * Handle open from generic layer.
 112  *
 113  * This is called by the diskslice code on first open in order to get the
 114  * basic device geometry paramters.
 115  */
 116 static int
 117 aac_disk_open(struct dev_open_args *ap)
 118 {
 119         cdev_t dev = ap->a_head.a_dev;
 120         struct aac_disk *sc;
 121         struct disk_info info;
 122
 123         debug_called(0);
 124
 125         sc = (struct aac_disk *)dev->si_drv1;
 126
 127         if (sc == NULL) {
 128                 kprintf("aac_disk_open: No Softc\n");
 129                 return (ENXIO);
 130         }
 131
 132         /* check that the controller is up and running */
 133         if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) {
 134                 kprintf("Controller Suspended controller state = 0x%x\n",
 135                        sc->ad_controller->aac_state);
 136                 return(ENXIO);
 137         }
 138
 139         /* build synthetic label */
 140         bzero(&info, sizeof(info));
 141         info.d_media_blksize= AAC_BLOCK_SIZE;           /* mandatory */
 142         info.d_media_blocks = sc->ad_size;
 143
 144         info.d_type = DTYPE_ESDI;                       /* optional */
 145         info.d_secpertrack   = sc->ad_sectors;
 146         info.d_nheads   = sc->ad_heads;
 147         info.d_ncylinders = sc->ad_cylinders;
 148         info.d_secpercyl  = sc->ad_sectors * sc->ad_heads;
 149
 150         disk_setdiskinfo(&sc->ad_disk, &info);
 151         sc->ad_flags |= AAC_DISK_OPEN;
 152         return (0);
 153 }
 154
 155 /*
 156  * Handle last close of the disk device.
 157  */
 158 static int
 159 aac_disk_close(struct dev_close_args *ap)
 160 {
 161         cdev_t dev = ap->a_head.a_dev;
 162         struct aac_disk *sc;
 163
 164         debug_called(0);
 165
 166         sc = (struct aac_disk *)dev->si_drv1;
 167
 168         if (sc == NULL)
 169                 return (ENXIO);
 170
 171         sc->ad_flags &= ~AAC_DISK_OPEN;
 172         return (0);
 173 }
 174
 175 /*
 176  * Handle an I/O request.
 177  */
 178 static int
 179 aac_disk_strategy(struct dev_strategy_args *ap)
 180 {
 181         cdev_t dev = ap->a_head.a_dev;
 182         struct bio *bio = ap->a_bio;
 183         struct buf *bp = bio->bio_buf;
 184         struct aac_disk *sc;
 185
 186         debug_called(4);
 187
 188         sc = (struct aac_disk *)dev->si_drv1;
 189
 190         /* bogus disk? */
 191         if (sc == NULL) {
 192                 bp->b_flags |= B_ERROR;
 193                 bp->b_error = EINVAL;
 194                 biodone(bio);
 195                 return(0);
 196         }
 197
 198         /* do-nothing operation? */
 199         if (bp->b_bcount == 0) {
 200                 bp->b_resid = bp->b_bcount;
 201                 biodone(bio);
 202                 return(0);
 203         }
 204
 205         /* perform accounting */
 206         devstat_start_transaction(&sc->ad_stats);
 207
 208         /* pass the bio to the controller - it can work out who we are */
 209         aac_submit_bio(sc, bio);
 210         return(0);
 211 }
 212
 213 /*
 214  * Dump memory out to an array
 215  *
 216  * This queues blocks of memory of size AAC_MAXIO to the controller and waits
 217  * for the controller to complete the requests.
 218  */
 219 static int
 220 aac_disk_dump(struct dev_dump_args *ap)
 221 {
 222         cdev_t dev = ap->a_head.a_dev;
 223         struct aac_disk *ad;
 224         struct aac_softc *sc;
 225         vm_offset_t addr;
 226         long blkcnt;
 227         int dumppages;
 228         int i, error;
 229
 230         ad = dev->si_drv1;
 231         addr = 0;
 232         dumppages = AAC_MAXIO / PAGE_SIZE;
 233
 234         if (ad == NULL)
 235                 return (ENXIO);
 236
 237         sc= ad->ad_controller;
 238
 239         blkcnt = howmany(PAGE_SIZE, ap->a_secsize);
 240
 241         while (ap->a_count > 0) {
 242                 caddr_t va = NULL;
 243
 244                 if ((ap->a_count / blkcnt) < dumppages)
 245                         dumppages = ap->a_count / blkcnt;
 246
 247                 for (i = 0; i < dumppages; ++i) {
 248                         vm_offset_t a = addr + (i * PAGE_SIZE);
 249                         if (is_physical_memory(a)) {
 250                                 va = pmap_kenter_temporary(trunc_page(a), i);
 251                         } else {
 252                                 va = pmap_kenter_temporary(trunc_page(0), i);
 253                         }
 254                 }
 255
 256 retry:
 257                 /*
 258                  * Queue the block to the controller.  If the queue is full,
 259                  * EBUSY will be returned.
 260                  */
 261                 error = aac_dump_enqueue(ad, ap->a_blkno, va, dumppages);
 262                 if (error && (error != EBUSY))
 263                         return (error);
 264
 265                 if (!error) {
 266                         if (dumpstatus(addr, (off_t)(ap->a_count * DEV_BSIZE)) < 0)
 267                         return (EINTR);
 268
 269                         ap->a_blkno += blkcnt * dumppages;
 270                         ap->a_count -= blkcnt * dumppages;
 271                         addr += PAGE_SIZE * dumppages;
 272                         if (ap->a_count > 0)
 273                         continue;
 274                 }
 275
 276                 /*
 277                  * Either the queue was full on the last attemp, or we have no
 278                  * more data to dump.  Let the queue drain out and retry the
 279                  * block if the queue was full.
 280                  */
 281                 aac_dump_complete(sc);
 282
 283                 if (error == EBUSY)
 284                         goto retry;
 285         }
 286
 287         return (0);
 288 }
 289
 290 /*
 291  * Handle completion of an I/O request.
 292  */
 293 void
 294 aac_biodone(struct bio *bio, const char *code)
 295 {
 296         struct buf *bp = bio->bio_buf;
 297         struct aac_disk *sc;
 298
 299         debug_called(4);
 300
 301         sc = (struct aac_disk *)bio->bio_driver_info;
 302
 303         devstat_end_transaction_buf(&sc->ad_stats, bp);
 304         if (bp->b_flags & B_ERROR) {
 305                 diskerr(bio, sc->ad_dev_t,
 306                         code, 0, 0);
 307         }
 308         biodone(bio);
 309 }
 310
 311 /*
 312  * Stub only.
 313  */
 314 static int
 315 aac_disk_probe(device_t dev)
 316 {
 317
 318         debug_called(2);
 319
 320         return (0);
 321 }
 322
 323 /*
 324  * Attach a unit to the controller.
 325  */
 326 static int
 327 aac_disk_attach(device_t dev)
 328 {
 329         struct aac_disk *sc;
 330
 331         debug_called(0);
 332
 333         sc = (struct aac_disk *)device_get_softc(dev);
 334
 335         /* initialise our softc */
 336         sc->ad_controller =
 337             (struct aac_softc *)device_get_softc(device_get_parent(dev));
 338         sc->ad_container = device_get_ivars(dev);
 339         sc->ad_dev = dev;
 340
 341         /*
 342          * require that extended translation be enabled - other drivers read the
 343          * disk!
 344          */
 345         sc->ad_size = sc->ad_container->co_mntobj.Capacity;
 346         if (sc->ad_size >= (2 * 1024 * 1024)) {         /* 2GB */
 347                 sc->ad_heads = 255;
 348                 sc->ad_sectors = 63;
 349         } else if (sc->ad_size >= (1 * 1024 * 1024)) {  /* 1GB */
 350                 sc->ad_heads = 128;
 351                 sc->ad_sectors = 32;
 352         } else {
 353                 sc->ad_heads = 64;
 354                 sc->ad_sectors = 32;
 355         }
 356         sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors));
 357
 358         device_printf(dev, "%uMB (%u sectors)\n",
 359                       sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
 360                       sc->ad_size);
 361
 362         devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev),
 363                           AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS,
 364                           DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
 365                           DEVSTAT_PRIORITY_ARRAY);
 366
 367         /* attach a generic disk device to ourselves */
 368         sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk,
 369                                    &aac_disk_ops);
 370         sc->ad_dev_t->si_drv1 = sc;
 371
 372         sc->ad_dev_t->si_iosize_max = aac_iosize_max;
 373         sc->unit = device_get_unit(dev);
 374
 375         return (0);
 376 }
 377
 378 /*
 379  * Disconnect ourselves from the system.
 380  */
 381 static int
 382 aac_disk_detach(device_t dev)
 383 {
 384         struct aac_disk *sc;
 385
 386         debug_called(2);
 387
 388         sc = (struct aac_disk *)device_get_softc(dev);
 389
 390         if (sc->ad_flags & AAC_DISK_OPEN)
 391                 return(EBUSY);
 392
 393         devstat_remove_entry(&sc->ad_stats);
 394         disk_destroy(&sc->ad_disk);
 395         return(0);
 396 }