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: head/sys/dev/aac/aac_disk.c 251115 2013-05-30 00:11:22Z marius $
  30  */
  31
  32 #include "opt_aac.h"
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/module.h>
  38
  39 #include <sys/bus.h>
  40 #include <sys/conf.h>
  41 #include <sys/disk.h>
  42 #include <sys/dtype.h>
  43
  44 #include <vm/vm.h>
  45 #include <vm/pmap.h>
  46
  47 #include <machine/md_var.h>
  48 #include <sys/rman.h>
  49
  50 #include <dev/raid/aac/aacreg.h>
  51 #include <dev/raid/aac/aac_ioctl.h>
  52 #include <dev/raid/aac/aacvar.h>
  53
  54 /*
  55  * Interface to parent.
  56  */
  57 static int aac_disk_probe(device_t dev);
  58 static int aac_disk_attach(device_t dev);
  59 static int aac_disk_detach(device_t dev);
  60
  61 /*
  62  * Interface to the device switch.
  63  */
  64 static  d_open_t        aac_disk_open;
  65 static  d_close_t       aac_disk_close;
  66 static  d_strategy_t    aac_disk_strategy;
  67 static  d_dump_t        aac_disk_dump;
  68
  69 static struct dev_ops aac_disk_ops = {
  70         { "aacd", 0, D_DISK },
  71         .d_open =               aac_disk_open,
  72         .d_close =              aac_disk_close,
  73         .d_read =               physread,
  74         .d_write =              physwrite,
  75         .d_strategy =           aac_disk_strategy,
  76         .d_dump =               aac_disk_dump,
  77 };
  78
  79 static devclass_t       aac_disk_devclass;
  80
  81 static device_method_t aac_disk_methods[] = {
  82         DEVMETHOD(device_probe, aac_disk_probe),
  83         DEVMETHOD(device_attach,        aac_disk_attach),
  84         DEVMETHOD(device_detach,        aac_disk_detach),
  85         DEVMETHOD_END
  86 };
  87
  88 static driver_t aac_disk_driver = {
  89         "aacd",
  90         aac_disk_methods,
  91         sizeof(struct aac_disk)
  92 };
  93
  94 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, NULL, NULL);
  95
  96 /*
  97  * Handle open from generic layer.
  98  *
  99  * This is called by the diskslice code on first open in order to get the
 100  * basic device geometry paramters.
 101  */
 102 static int
 103 aac_disk_open(struct dev_open_args *ap)
 104 {
 105         struct aac_disk *sc;
 106
 107         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
 108
 109         sc = ap->a_head.a_dev->si_drv1;
 110
 111         if (sc == NULL) {
 112                 kprintf("aac_disk_open: No Softc\n");
 113                 return (ENXIO);
 114         }
 115
 116         /* check that the controller is up and running */
 117         if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) {
 118                 device_printf(sc->ad_controller->aac_dev,
 119                     "Controller Suspended controller state = 0x%x\n",
 120                     sc->ad_controller->aac_state);
 121                 return(ENXIO);
 122         }
 123
 124         sc->ad_flags |= AAC_DISK_OPEN;
 125         return (0);
 126 }
 127
 128 /*
 129  * Handle last close of the disk device.
 130  */
 131 static int
 132 aac_disk_close(struct dev_close_args *ap)
 133 {
 134         struct aac_disk *sc;
 135
 136         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
 137
 138         sc = ap->a_head.a_dev->si_drv1;
 139
 140         if (sc == NULL)
 141                 return (ENXIO);
 142
 143         sc->ad_flags &= ~AAC_DISK_OPEN;
 144         return (0);
 145 }
 146
 147 /*
 148  * Handle an I/O request.
 149  */
 150 static int
 151 aac_disk_strategy(struct dev_strategy_args *ap)
 152 {
 153         struct bio *bio = ap->a_bio;
 154         struct buf *bp = bio->bio_buf;
 155         struct aac_disk *sc;
 156
 157         sc = ap->a_head.a_dev->si_drv1;
 158         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
 159
 160         /* bogus disk? */
 161         if (sc == NULL) {
 162                 bp->b_flags |= B_ERROR;
 163                 bp->b_error = EINVAL;
 164                 biodone(bio);
 165                 return (0);
 166         }
 167
 168         /* do-nothing operation? */
 169         if (bp->b_bcount == 0) {
 170                 bp->b_resid = bp->b_bcount;
 171                 biodone(bio);
 172                 return (0);
 173         }
 174
 175         /* perform accounting */
 176
 177         /* pass the bio to the controller - it can work out who we are */
 178         lockmgr(&sc->ad_controller->aac_io_lock, LK_EXCLUSIVE);
 179         devstat_start_transaction(&sc->ad_stats);
 180         aac_submit_bio(sc, bio);
 181         lockmgr(&sc->ad_controller->aac_io_lock, LK_RELEASE);
 182
 183         return (0);
 184 }
 185
 186 /*
 187  * Map the S/G elements for doing a dump.
 188  */
 189 static void
 190 aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
 191 {
 192         struct aac_fib *fib;
 193         struct aac_blockwrite *bw;
 194         struct aac_sg_table *sg;
 195         int i;
 196
 197         fib = (struct aac_fib *)arg;
 198         bw = (struct aac_blockwrite *)&fib->data[0];
 199         sg = &bw->SgMap;
 200
 201         if (sg != NULL) {
 202                 sg->SgCount = nsegs;
 203                 for (i = 0; i < nsegs; i++) {
 204                         if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT)
 205                                 return;
 206                         sg->SgEntry[i].SgAddress = segs[i].ds_addr;
 207                         sg->SgEntry[i].SgByteCount = segs[i].ds_len;
 208                 }
 209                 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry);
 210         }
 211 }
 212
 213 /*
 214  * Map the S/G elements for doing a dump on 64-bit capable devices.
 215  */
 216 static void
 217 aac_dump_map_sg64(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
 218 {
 219         struct aac_fib *fib;
 220         struct aac_blockwrite64 *bw;
 221         struct aac_sg_table64 *sg;
 222         int i;
 223
 224         fib = (struct aac_fib *)arg;
 225         bw = (struct aac_blockwrite64 *)&fib->data[0];
 226         sg = &bw->SgMap64;
 227
 228         if (sg != NULL) {
 229                 sg->SgCount = nsegs;
 230                 for (i = 0; i < nsegs; i++) {
 231                         sg->SgEntry64[i].SgAddress = segs[i].ds_addr;
 232                         sg->SgEntry64[i].SgByteCount = segs[i].ds_len;
 233                 }
 234                 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry64);
 235         }
 236 }
 237
 238 /*
 239  * Dump memory out to an array
 240  *
 241  * Send out one command at a time with up to maxio of data.
 242  */
 243 static int
 244 aac_disk_dump(struct dev_dump_args *ap)
 245 {
 246         cdev_t dev = ap->a_head.a_dev;
 247         size_t length = ap->a_length;
 248         off_t offset = ap->a_offset;
 249         void *virtual = ap->a_virtual;
 250         vm_offset_t physical = ap->a_physical;
 251         struct aac_disk *ad;
 252         struct aac_softc *sc;
 253         struct aac_fib *fib;
 254         size_t len, maxio;
 255         int size;
 256         static bus_dmamap_t dump_datamap;
 257         static int first = 0;
 258         bus_dmamap_callback_t *callback;
 259         u_int32_t command;
 260
 261         ad = dev->si_drv1;
 262
 263         if (ad == NULL)
 264                 return (EINVAL);
 265
 266         sc= ad->ad_controller;
 267
 268         if (!first) {
 269                 first = 1;
 270                 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) {
 271                         device_printf(sc->aac_dev,
 272                             "bus_dmamap_create failed\n");
 273                         return (ENOMEM);
 274                 }
 275         }
 276
 277         /* Skip aac_alloc_sync_fib().  We don't want to mess with sleep locks */
 278         fib = &sc->aac_common->ac_sync_fib;
 279
 280         while (length > 0) {
 281                 maxio = sc->aac_max_sectors << 9;
 282                 len = (length > maxio) ? maxio : length;
 283                 if ((sc->flags & AAC_FLAGS_SG_64BIT) == 0) {
 284                         struct aac_blockwrite *bw;
 285                         bw = (struct aac_blockwrite *)&fib->data[0];
 286                         bw->Command = VM_CtBlockWrite;
 287                         bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
 288                         bw->BlockNumber = offset / AAC_BLOCK_SIZE;
 289                         bw->ByteCount = len;
 290                         bw->Stable = CUNSTABLE;
 291                         command = ContainerCommand;
 292                         callback = aac_dump_map_sg;
 293                         size = sizeof(struct aac_blockwrite);
 294                 } else {
 295                         struct aac_blockwrite64 *bw;
 296                         bw = (struct aac_blockwrite64 *)&fib->data[0];
 297                         bw->Command = VM_CtHostWrite64;
 298                         bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
 299                         bw->BlockNumber = offset / AAC_BLOCK_SIZE;
 300                         bw->SectorCount = len / AAC_BLOCK_SIZE;
 301                         bw->Pad = 0;
 302                         bw->Flags = 0;
 303                         command = ContainerCommand64;
 304                         callback = aac_dump_map_sg64;
 305                         size = sizeof(struct aac_blockwrite64);
 306                 }
 307
 308                 /*
 309                  * There really isn't any way to recover from errors or
 310                  * resource shortages here.  Oh well.  Because of that, don't
 311                  * bother trying to send the command from the callback; there
 312                  * is too much required context.
 313                  */
 314                 if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual,
 315                     len, callback, fib, BUS_DMA_NOWAIT) != 0)
 316                         return (ENOMEM);
 317
 318                 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
 319                     BUS_DMASYNC_PREWRITE);
 320
 321                 /* fib->Header.Size is set in aac_dump_map_sg */
 322                 size += fib->Header.Size;
 323
 324                 if (aac_sync_fib(sc, command, 0, fib, size)) {
 325                         device_printf(sc->aac_dev,
 326                              "Error dumping block 0x%jx\n",
 327                              (uintmax_t)physical);
 328                         return (EIO);
 329                 }
 330
 331                 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
 332                     BUS_DMASYNC_POSTWRITE);
 333
 334                 bus_dmamap_unload(sc->aac_buffer_dmat, dump_datamap);
 335
 336                 length -= len;
 337                 offset += len;
 338                 virtual = (uint8_t *)virtual + len;
 339         }
 340
 341         return (0);
 342 }
 343
 344 /*
 345  * Handle completion of an I/O request.
 346  */
 347 void
 348 aac_biodone(struct bio *bio, const char *code)
 349 {
 350         struct buf *bp = bio->bio_buf;
 351         struct aac_disk *sc;
 352
 353         sc = (struct aac_disk *)bio->bio_driver_info;
 354         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
 355
 356         devstat_end_transaction_buf(&sc->ad_stats, bp);
 357         if (bp->b_flags & B_ERROR) {
 358                 bp->b_resid = bp->b_bcount;
 359                 diskerr(bio, sc->ad_dev_t, code, 0, 0);
 360         }
 361
 362         biodone(bio);
 363 }
 364
 365 /*
 366  * Stub only.
 367  */
 368 static int
 369 aac_disk_probe(device_t dev)
 370 {
 371
 372         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
 373
 374         return (0);
 375 }
 376
 377 /*
 378  * Attach a unit to the controller.
 379  */
 380 static int
 381 aac_disk_attach(device_t dev)
 382 {
 383         struct disk_info info;
 384         struct aac_disk *sc;
 385
 386         sc = (struct aac_disk *)device_get_softc(dev);
 387         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
 388
 389         /* initialise our softc */
 390         sc->ad_controller =
 391             (struct aac_softc *)device_get_softc(device_get_parent(dev));
 392         sc->ad_container = device_get_ivars(dev);
 393         sc->ad_dev = dev;
 394
 395         /*
 396          * require that extended translation be enabled - other drivers read the
 397          * disk!
 398          */
 399         sc->ad_size = sc->ad_container->co_mntobj.Capacity;
 400         if (sc->ad_controller->flags & AAC_FLAGS_LBA_64BIT)
 401                 sc->ad_size += (u_int64_t)
 402                         sc->ad_container->co_mntobj.CapacityHigh << 32;
 403         if (sc->ad_size >= (2 * 1024 * 1024)) {         /* 2GB */
 404                 sc->ad_heads = 255;
 405                 sc->ad_sectors = 63;
 406         } else if (sc->ad_size >= (1 * 1024 * 1024)) {  /* 1GB */
 407                 sc->ad_heads = 128;
 408                 sc->ad_sectors = 32;
 409         } else {
 410                 sc->ad_heads = 64;
 411                 sc->ad_sectors = 32;
 412         }
 413         sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors));
 414
 415         device_printf(dev, "%juMB (%ju sectors)\n",
 416                       (intmax_t)sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
 417                       (intmax_t)sc->ad_size);
 418         devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev),
 419                           AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS,
 420                           DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER,
 421                           DEVSTAT_PRIORITY_ARRAY);
 422
 423         /* attach a generic disk device to ourselves */
 424         sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk,
 425                                    &aac_disk_ops);
 426         sc->ad_dev_t->si_drv1 = sc;
 427
 428         sc->ad_dev_t->si_iosize_max = sc->ad_controller->aac_max_sectors << 9;
 429         sc->unit = device_get_unit(dev);
 430
 431         /*
 432          * Set disk info, as it appears that all needed data is available already.
 433          * Setting the disk info will also cause the probing to start.
 434          */
 435         bzero(&info, sizeof(info));
 436         info.d_media_blksize= AAC_BLOCK_SIZE;           /* mandatory */
 437         info.d_media_blocks = sc->ad_size;
 438
 439         info.d_type = DTYPE_ESDI;                       /* optional */
 440         info.d_secpertrack   = sc->ad_sectors;
 441         info.d_nheads   = sc->ad_heads;
 442         info.d_ncylinders = sc->ad_cylinders;
 443         info.d_secpercyl  = sc->ad_sectors * sc->ad_heads;
 444
 445         disk_setdiskinfo(&sc->ad_disk, &info);
 446
 447         return (0);
 448 }
 449
 450 /*
 451  * Disconnect ourselves from the system.
 452  */
 453 static int
 454 aac_disk_detach(device_t dev)
 455 {
 456         struct aac_disk *sc;
 457
 458         sc = (struct aac_disk *)device_get_softc(dev);
 459         fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
 460
 461         if (sc->ad_flags & AAC_DISK_OPEN)
 462                 return(EBUSY);
 463
 464         devstat_remove_entry(&sc->ad_stats);
 465         disk_destroy(&sc->ad_disk);
 466
 467         return(0);
 468 }