sys/dev/disk/nata/ata-disk.c

   1 /*-
   2  * Copyright (c) 1998 - 2006 Søren Schmidt <sos@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    without modification, immediately at the beginning of the file.
  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  * $FreeBSD: src/sys/dev/ata/ata-disk.c,v 1.199 2006/09/14 19:12:29 sos Exp $
  27  */
  28
  29 #include "opt_ata.h"
  30
  31 #include <sys/param.h>
  32 #include <sys/bio.h>
  33 #include <sys/buf.h>
  34 #include <sys/bus.h>
  35 #include <sys/device.h>
  36 #include <sys/devicestat.h>
  37 #include <sys/disk.h>
  38 #include <sys/libkern.h>
  39 #include <sys/malloc.h>
  40 #include <sys/module.h>
  41 #include <sys/nata.h>
  42 #include <sys/systm.h>
  43
  44 #include <vm/pmap.h>
  45
  46 #include <machine/md_var.h>
  47
  48 #include "ata-all.h"
  49 #include "ata-disk.h"
  50 #include "ata_if.h"
  51
  52 /* device structure */
  53 static  d_open_t        ad_open;
  54 static  d_close_t       ad_close;
  55 static  d_ioctl_t       ad_ioctl;
  56 static  d_strategy_t    ad_strategy;
  57 static  d_dump_t        ad_dump;
  58 static struct dev_ops ad_ops = {
  59         { "ad", 0, D_DISK },
  60         .d_open =       ad_open,
  61         .d_close =      ad_close,
  62         .d_read =       physread,
  63         .d_write =      physwrite,
  64         .d_ioctl =      ad_ioctl,
  65         .d_strategy =   ad_strategy,
  66         .d_dump =       ad_dump,
  67 };
  68
  69 /* prototypes */
  70 static void ad_init(device_t);
  71 static void ad_done(struct ata_request *);
  72 static void ad_describe(device_t dev);
  73 static int ad_version(u_int16_t);
  74
  75 /* local vars */
  76 static MALLOC_DEFINE(M_AD, "ad_driver", "ATA disk driver");
  77
  78 static int
  79 ad_probe(device_t dev)
  80 {
  81     struct ata_device *atadev = device_get_softc(dev);
  82
  83     if (!(atadev->param.config & ATA_PROTO_ATAPI) ||
  84         (atadev->param.config == ATA_CFA_MAGIC1) ||
  85         (atadev->param.config == ATA_CFA_MAGIC2) ||
  86         (atadev->param.config == ATA_CFA_MAGIC3))
  87         return 0;
  88     else
  89         return ENXIO;
  90 }
  91
  92 static int
  93 ad_attach(device_t dev)
  94 {
  95     struct ata_channel *ch = device_get_softc(device_get_parent(dev));
  96     struct ata_device *atadev = device_get_softc(dev);
  97     struct disk_info info;
  98     struct ad_softc *adp;
  99     cdev_t cdev;
 100     u_int32_t lbasize;
 101     u_int64_t lbasize48;
 102
 103     /* check that we have a virgin disk to attach */
 104     if (device_get_ivars(dev))
 105         return EEXIST;
 106
 107     adp = kmalloc(sizeof(struct ad_softc), M_AD, M_INTWAIT | M_ZERO);
 108     device_set_ivars(dev, adp);
 109
 110     if ((atadev->param.atavalid & ATA_FLAG_54_58) &&
 111         atadev->param.current_heads && atadev->param.current_sectors) {
 112         adp->heads = atadev->param.current_heads;
 113         adp->sectors = atadev->param.current_sectors;
 114         adp->total_secs = (u_int32_t)atadev->param.current_size_1 |
 115                           ((u_int32_t)atadev->param.current_size_2 << 16);
 116     }
 117     else {
 118         adp->heads = atadev->param.heads;
 119         adp->sectors = atadev->param.sectors;
 120         adp->total_secs = atadev->param.cylinders * adp->heads * adp->sectors;
 121     }
 122     lbasize = (u_int32_t)atadev->param.lba_size_1 |
 123               ((u_int32_t)atadev->param.lba_size_2 << 16);
 124
 125     /* does this device need oldstyle CHS addressing */
 126     if (!ad_version(atadev->param.version_major) || !lbasize)
 127         atadev->flags |= ATA_D_USE_CHS;
 128
 129     /* use the 28bit LBA size if valid or bigger than the CHS mapping */
 130     if (atadev->param.cylinders == 16383 || adp->total_secs < lbasize)
 131         adp->total_secs = lbasize;
 132
 133     /* use the 48bit LBA size if valid */
 134     lbasize48 = ((u_int64_t)atadev->param.lba_size48_1) |
 135                 ((u_int64_t)atadev->param.lba_size48_2 << 16) |
 136                 ((u_int64_t)atadev->param.lba_size48_3 << 32) |
 137                 ((u_int64_t)atadev->param.lba_size48_4 << 48);
 138     if ((atadev->param.support.command2 & ATA_SUPPORT_ADDRESS48) &&
 139         lbasize48 > ATA_MAX_28BIT_LBA)
 140         adp->total_secs = lbasize48;
 141
 142     /* init device parameters */
 143     ad_init(dev);
 144
 145     /* create the disk device */
 146     /* XXX TGEN Maybe use DEVSTAT_ALL_SUPPORTED, DEVSTAT_TYPE_DIRECT,
 147        DEVSTAT_PRIORITY_MAX. */
 148     devstat_add_entry(&adp->stats, "ad", device_get_unit(dev), DEV_BSIZE,
 149                       DEVSTAT_NO_ORDERED_TAGS,
 150                       DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_IDE,
 151                       DEVSTAT_PRIORITY_DISK);
 152     cdev = disk_create(device_get_unit(dev), &adp->disk, &ad_ops);
 153     cdev->si_drv1 = dev;
 154     if (ch->dma)
 155         cdev->si_iosize_max = ch->dma->max_iosize;
 156     else
 157         cdev->si_iosize_max = DFLTPHYS;
 158     adp->cdev = cdev;
 159
 160     bzero(&info, sizeof(info));
 161     info.d_media_blksize = DEV_BSIZE;           /* mandatory */
 162     info.d_media_blocks = adp->total_secs;
 163
 164     info.d_secpertrack = adp->sectors;          /* optional */
 165     info.d_nheads = adp->heads;
 166     info.d_ncylinders = adp->total_secs/(adp->heads*adp->sectors);
 167     info.d_secpercyl = adp->sectors * adp->heads;
 168     info.d_serialno = atadev->param.serial;
 169
 170     device_add_child(dev, "subdisk", device_get_unit(dev));
 171     bus_generic_attach(dev);
 172
 173     /* announce we are here */
 174     ad_describe(dev);
 175
 176     disk_setdiskinfo(&adp->disk, &info);
 177
 178     return 0;
 179 }
 180
 181 static int
 182 ad_detach(device_t dev)
 183 {
 184     struct ad_softc *adp = device_get_ivars(dev);
 185     device_t *children;
 186     int nchildren, i;
 187
 188     /* check that we have a valid disk to detach */
 189     if (!adp)
 190         return ENXIO;
 191
 192 #if 0 /* XXX TGEN Probably useless, we fail the queue below. */
 193     /* check that the disk is closed */
 194     if (adp->ad_flags & AD_DISK_OPEN)
 195         return EBUSY;
 196 #endif /* 0 */
 197
 198     /* detach & delete all children */
 199     if (!device_get_children(dev, &children, &nchildren)) {
 200         for (i = 0; i < nchildren; i++)
 201             if (children[i])
 202                 device_delete_child(dev, children[i]);
 203         kfree(children, M_TEMP);
 204     }
 205
 206     /* detroy disk from the system so we dont get any further requests */
 207     disk_invalidate(&adp->disk);
 208     disk_destroy(&adp->disk);
 209
 210     /* fail requests on the queue and any thats "in flight" for this device */
 211     ata_fail_requests(dev);
 212
 213     /* dont leave anything behind */
 214     /* disk_destroy() already took care of the dev_ops */
 215     devstat_remove_entry(&adp->stats);
 216     device_set_ivars(dev, NULL);
 217     kfree(adp, M_AD);
 218     return 0;
 219 }
 220
 221 static void
 222 ad_shutdown(device_t dev)
 223 {
 224     struct ata_device *atadev = device_get_softc(dev);
 225
 226     if (atadev->param.support.command2 & ATA_SUPPORT_FLUSHCACHE)
 227         ata_controlcmd(dev, ATA_FLUSHCACHE, 0, 0, 0);
 228 }
 229
 230 static int
 231 ad_reinit(device_t dev)
 232 {
 233     struct ata_channel *ch = device_get_softc(device_get_parent(dev));
 234     struct ata_device *atadev = device_get_softc(dev);
 235
 236     /* if detach pending, return error */
 237     if (((atadev->unit == ATA_MASTER) && !(ch->devices & ATA_ATA_MASTER)) ||
 238         ((atadev->unit == ATA_SLAVE) && !(ch->devices & ATA_ATA_SLAVE))) {
 239         return 1;
 240     }
 241     ad_init(dev);
 242     return 0;
 243 }
 244
 245 static int
 246 ad_open(struct dev_open_args *ap)
 247 {
 248     device_t dev = ap->a_head.a_dev->si_drv1;
 249     struct ad_softc *adp = device_get_ivars(dev);
 250
 251     if (!adp || adp->cdev == NULL)
 252         return ENXIO;
 253     if(!device_is_attached(dev))
 254         return EBUSY;
 255
 256 #if 0 /* XXX TGEN Probably useless, queue will be failed on detach. */
 257     adp->ad_flags &= AD_DISK_OPEN;
 258 #endif /* 0 */
 259     return 0;
 260 }
 261
 262 static int
 263 ad_close(struct dev_close_args *ap)
 264 {
 265 #if 0 /* XXX TGEN Probably useless, queue will be failed on detach. */
 266     device_t dev = ap->a_head.a_dev->si_drv1;
 267     struct ad_softc *adp = device_get_ivars(dev);
 268     adp->ad_flags |= AD_DISK_OPEN;
 269 #endif /* 0 */
 270     return 0;
 271 }
 272
 273 static int
 274 ad_ioctl(struct dev_ioctl_args *ap)
 275 {
 276     return ata_device_ioctl(ap->a_head.a_dev->si_drv1, ap->a_cmd, ap->a_data);
 277 }
 278
 279 static int
 280 ad_strategy(struct dev_strategy_args *ap)
 281 {
 282     device_t dev =  ap->a_head.a_dev->si_drv1;
 283     struct bio *bp = ap->a_bio;
 284     struct buf *bbp = bp->bio_buf;
 285     struct ata_device *atadev = device_get_softc(dev);
 286     struct ata_request *request;
 287     struct ad_softc *adp = device_get_ivars(dev);
 288
 289     if (!(request = ata_alloc_request())) {
 290         device_printf(dev, "FAILURE - out of memory in strategy\n");
 291         bbp->b_flags |= B_ERROR;
 292         bbp->b_error = ENOMEM;
 293         biodone(bp);
 294         return(0);
 295     }
 296
 297     /* setup request */
 298     request->dev = dev;
 299     request->bio = bp;
 300     request->callback = ad_done;
 301     request->timeout = ATA_DEFAULT_TIMEOUT;
 302     request->retries = 2;
 303     request->data = bbp->b_data;
 304     request->bytecount = bbp->b_bcount;
 305     /* lba is block granularity, convert byte granularity bio_offset */
 306     request->u.ata.lba = (u_int64_t)(bp->bio_offset >> DEV_BSHIFT);
 307     request->u.ata.count = request->bytecount / DEV_BSIZE;
 308     request->transfersize = min(bbp->b_bcount, atadev->max_iosize);
 309
 310     switch (bbp->b_cmd) {
 311     case BUF_CMD_READ:
 312         request->flags = ATA_R_READ;
 313         if (atadev->mode >= ATA_DMA) {
 314             request->u.ata.command = ATA_READ_DMA;
 315             request->flags |= ATA_R_DMA;
 316         }
 317         else if (request->transfersize > DEV_BSIZE)
 318             request->u.ata.command = ATA_READ_MUL;
 319         else
 320             request->u.ata.command = ATA_READ;
 321         break;
 322     case BUF_CMD_WRITE:
 323         request->flags = ATA_R_WRITE;
 324         if (atadev->mode >= ATA_DMA) {
 325             request->u.ata.command = ATA_WRITE_DMA;
 326             request->flags |= ATA_R_DMA;
 327         }
 328         else if (request->transfersize > DEV_BSIZE)
 329             request->u.ata.command = ATA_WRITE_MUL;
 330         else
 331             request->u.ata.command = ATA_WRITE;
 332         break;
 333     case BUF_CMD_FLUSH:
 334         request->u.ata.lba = 0;
 335         request->u.ata.count = 0;
 336         request->u.ata.feature = 0;
 337         request->bytecount = 0;
 338         request->transfersize = 0;
 339         request->flags = ATA_R_CONTROL;
 340         request->u.ata.command = ATA_FLUSHCACHE;
 341         /* ATA FLUSHCACHE requests may take up to 30 sec to timeout */
 342         request->timeout = 30;
 343         break;
 344     default:
 345         device_printf(dev, "FAILURE - unknown BUF operation\n");
 346         ata_free_request(request);
 347         bbp->b_flags |= B_ERROR;
 348         bbp->b_error = EIO;
 349         biodone(bp);
 350         return(0);
 351     }
 352     request->flags |= ATA_R_ORDERED;
 353     devstat_start_transaction(&adp->stats);
 354     ata_queue_request(request);
 355     return(0);
 356 }
 357
 358 static void
 359 ad_done(struct ata_request *request)
 360 {
 361     struct ad_softc *adp = device_get_ivars(request->dev);
 362     struct bio *bp = request->bio;
 363     struct buf *bbp = bp->bio_buf;
 364
 365     /* finish up transfer */
 366     if ((bbp->b_error = request->result))
 367         bbp->b_flags |= B_ERROR;
 368     bbp->b_resid = bbp->b_bcount - request->donecount;
 369     devstat_end_transaction_buf(&adp->stats, bbp);
 370     biodone(bp);
 371     ata_free_request(request);
 372 }
 373
 374 static int
 375 ad_dump(struct dev_dump_args *ap)
 376 {
 377         device_t dev = ap->a_head.a_dev->si_drv1;
 378         struct ata_device *atadev = device_get_softc(dev);
 379         struct ata_request request;
 380
 381         ata_drop_requests(dev);
 382         /*
 383          * 0 length means flush buffers and return
 384          */
 385         if (ap->a_length == 0) {
 386                 /* flush buffers to media */
 387                 if (atadev->param.support.command2 & ATA_SUPPORT_FLUSHCACHE)
 388                         return ata_controlcmd(dev, ATA_FLUSHCACHE, 0, 0, 0);
 389                 else
 390                         return ENXIO;
 391         }
 392
 393         bzero(&request, sizeof(struct ata_request));
 394         request.dev = dev;
 395
 396         request.data = ap->a_virtual;
 397         request.bytecount = ap->a_length;
 398         request.transfersize = min(request.bytecount, atadev->max_iosize);
 399         request.flags = ATA_R_WRITE;
 400
 401         if (atadev->mode >= ATA_DMA) {
 402                 request.u.ata.command = ATA_WRITE_DMA;
 403                 request.flags |= ATA_DMA;
 404         } else if (request.transfersize > DEV_BSIZE)
 405                 request.u.ata.command = ATA_WRITE_MUL;
 406         else
 407                 request.u.ata.command = ATA_WRITE;
 408         request.u.ata.lba = ap->a_offset / DEV_BSIZE;
 409         request.u.ata.count = request.bytecount / DEV_BSIZE;
 410
 411         request.timeout = ATA_DEFAULT_TIMEOUT;
 412         request.retries = 2;
 413
 414         ata_queue_request(&request);
 415         return request.result;
 416 }
 417
 418 static void
 419 ad_init(device_t dev)
 420 {
 421     struct ata_device *atadev = device_get_softc(dev);
 422
 423     ATA_SETMODE(device_get_parent(dev), dev);
 424
 425     /* enable readahead caching */
 426     if (atadev->param.support.command1 & ATA_SUPPORT_LOOKAHEAD)
 427         ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_ENAB_RCACHE, 0, 0);
 428
 429     /* enable write caching if supported and configured */
 430     if (atadev->param.support.command1 & ATA_SUPPORT_WRITECACHE) {
 431         if (ata_wc)
 432             ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_ENAB_WCACHE, 0, 0);
 433         else
 434             ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_DIS_WCACHE, 0, 0);
 435     }
 436
 437     /* use multiple sectors/interrupt if device supports it */
 438     if (ad_version(atadev->param.version_major)) {
 439         int secsperint = max(1, min(atadev->param.sectors_intr & 0xff, 16));
 440
 441         if (!ata_controlcmd(dev, ATA_SET_MULTI, 0, 0, secsperint))
 442             atadev->max_iosize = secsperint * DEV_BSIZE;
 443     }
 444     else
 445         atadev->max_iosize = DEV_BSIZE;
 446 }
 447
 448 void
 449 ad_describe(device_t dev)
 450 {
 451     struct ata_channel *ch = device_get_softc(device_get_parent(dev));
 452     struct ata_device *atadev = device_get_softc(dev);
 453     struct ad_softc *adp = device_get_ivars(dev);
 454     u_int8_t *marker, vendor[64], product[64];
 455
 456     /* try to seperate the ATA model string into vendor and model parts */
 457     if ((marker = index(atadev->param.model, ' ')) ||
 458         (marker = index(atadev->param.model, '-'))) {
 459         int len = (marker - atadev->param.model);
 460
 461         strncpy(vendor, atadev->param.model, len);
 462         vendor[len++] = 0;
 463         strcat(vendor, " ");
 464         strncpy(product, atadev->param.model + len, 40 - len);
 465         vendor[40 - len] = 0;
 466     }
 467     else {
 468         if (!strncmp(atadev->param.model, "ST", 2))
 469             strcpy(vendor, "Seagate ");
 470         else if (!strncmp(atadev->param.model, "HDS", 3))
 471             strcpy(vendor, "Hitachi ");
 472         else
 473             strcpy(vendor, "");
 474         strncpy(product, atadev->param.model, 40);
 475     }
 476
 477     device_printf(dev, "%lluMB <%s%s %.8s> at ata%d-%s %s%s\n",
 478                   (unsigned long long)(adp->total_secs / (1048576 / DEV_BSIZE)),
 479                   vendor, product, atadev->param.revision,
 480                   device_get_unit(ch->dev),
 481                   (atadev->unit == ATA_MASTER) ? "master" : "slave",
 482                   (adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
 483                   ata_mode2str(atadev->mode));
 484     if (bootverbose) {
 485         device_printf(dev, "%llu sectors [%lluC/%dH/%dS] "
 486                       "%d sectors/interrupt %d depth queue\n",
 487                       (unsigned long long)adp->total_secs,(unsigned long long)(
 488                       adp->total_secs / (adp->heads * adp->sectors)),
 489                       adp->heads, adp->sectors, atadev->max_iosize / DEV_BSIZE,
 490                       adp->num_tags + 1);
 491     }
 492 }
 493
 494 static int
 495 ad_version(u_int16_t version)
 496 {
 497     int bit;
 498
 499     if (version == 0xffff)
 500         return 0;
 501     for (bit = 15; bit >= 0; bit--)
 502         if (version & (1<<bit))
 503             return bit;
 504     return 0;
 505 }
 506
 507 static device_method_t ad_methods[] = {
 508     /* device interface */
 509     DEVMETHOD(device_probe,     ad_probe),
 510     DEVMETHOD(device_attach,    ad_attach),
 511     DEVMETHOD(device_detach,    ad_detach),
 512     DEVMETHOD(device_shutdown,  ad_shutdown),
 513
 514     /* ATA methods */
 515     DEVMETHOD(ata_reinit,       ad_reinit),
 516
 517     { 0, 0 }
 518 };
 519
 520 static driver_t ad_driver = {
 521     "ad",
 522     ad_methods,
 523     0,
 524 };
 525
 526 devclass_t ad_devclass;
 527
 528 DRIVER_MODULE(ad, ata, ad_driver, ad_devclass, NULL, NULL);
 529 MODULE_VERSION(ad, 1);
 530 MODULE_DEPEND(ad, ata, 1, 1, 1);