git.oblomov.eu Git - linux-2.6/blob - drivers/ide/ide-acpi.c

   1 /*
   2  * Provides ACPI support for IDE drives.
   3  *
   4  * Copyright (C) 2005 Intel Corp.
   5  * Copyright (C) 2005 Randy Dunlap
   6  * Copyright (C) 2006 SUSE Linux Products GmbH
   7  * Copyright (C) 2006 Hannes Reinecke
   8  */
   9
  10 #include <linux/ata.h>
  11 #include <linux/delay.h>
  12 #include <linux/device.h>
  13 #include <linux/errno.h>
  14 #include <linux/kernel.h>
  15 #include <acpi/acpi.h>
  16 #include <linux/ide.h>
  17 #include <linux/pci.h>
  18 #include <linux/dmi.h>
  19
  20 #include <acpi/acpi_bus.h>
  21
  22 #define REGS_PER_GTF            7
  23
  24 struct GTM_buffer {
  25         u32     PIO_speed0;
  26         u32     DMA_speed0;
  27         u32     PIO_speed1;
  28         u32     DMA_speed1;
  29         u32     GTM_flags;
  30 };
  31
  32 struct ide_acpi_drive_link {
  33         acpi_handle      obj_handle;
  34         u8               idbuff[512];
  35 };
  36
  37 struct ide_acpi_hwif_link {
  38         ide_hwif_t                      *hwif;
  39         acpi_handle                      obj_handle;
  40         struct GTM_buffer                gtm;
  41         struct ide_acpi_drive_link       master;
  42         struct ide_acpi_drive_link       slave;
  43 };
  44
  45 #undef DEBUGGING
  46 /* note: adds function name and KERN_DEBUG */
  47 #ifdef DEBUGGING
  48 #define DEBPRINT(fmt, args...)  \
  49                 printk(KERN_DEBUG "%s: " fmt, __func__, ## args)
  50 #else
  51 #define DEBPRINT(fmt, args...)  do {} while (0)
  52 #endif  /* DEBUGGING */
  53
  54 static int ide_noacpi;
  55 module_param_named(noacpi, ide_noacpi, bool, 0);
  56 MODULE_PARM_DESC(noacpi, "disable IDE ACPI support");
  57
  58 static int ide_acpigtf;
  59 module_param_named(acpigtf, ide_acpigtf, bool, 0);
  60 MODULE_PARM_DESC(acpigtf, "enable IDE ACPI _GTF support");
  61
  62 static int ide_acpionboot;
  63 module_param_named(acpionboot, ide_acpionboot, bool, 0);
  64 MODULE_PARM_DESC(acpionboot, "call IDE ACPI methods on boot");
  65
  66 static bool ide_noacpi_psx;
  67 static int no_acpi_psx(const struct dmi_system_id *id)
  68 {
  69         ide_noacpi_psx = true;
  70         printk(KERN_NOTICE"%s detected - disable ACPI _PSx.\n", id->ident);
  71         return 0;
  72 }
  73
  74 static const struct dmi_system_id ide_acpi_dmi_table[] = {
  75         /* Bug 9673. */
  76         /* We should check if this is because ACPI NVS isn't save/restored. */
  77         {
  78                 .callback = no_acpi_psx,
  79                 .ident    = "HP nx9005",
  80                 .matches  = {
  81                         DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies Ltd."),
  82                         DMI_MATCH(DMI_BIOS_VERSION, "KAM1.60")
  83                 },
  84         },
  85
  86         { }     /* terminate list */
  87 };
  88
  89 int ide_acpi_init(void)
  90 {
  91         dmi_check_system(ide_acpi_dmi_table);
  92         return 0;
  93 }
  94
  95 bool ide_port_acpi(ide_hwif_t *hwif)
  96 {
  97         return ide_noacpi == 0 && hwif->acpidata;
  98 }
  99
 100 /**
 101  * ide_get_dev_handle - finds acpi_handle and PCI device.function
 102  * @dev: device to locate
 103  * @handle: returned acpi_handle for @dev
 104  * @pcidevfn: return PCI device.func for @dev
 105  *
 106  * Returns the ACPI object handle to the corresponding PCI device.
 107  *
 108  * Returns 0 on success, <0 on error.
 109  */
 110 static int ide_get_dev_handle(struct device *dev, acpi_handle *handle,
 111                                acpi_integer *pcidevfn)
 112 {
 113         struct pci_dev *pdev = to_pci_dev(dev);
 114         unsigned int bus, devnum, func;
 115         acpi_integer addr;
 116         acpi_handle dev_handle;
 117         struct acpi_buffer buffer = {.length = ACPI_ALLOCATE_BUFFER,
 118                                         .pointer = NULL};
 119         acpi_status status;
 120         struct acpi_device_info *dinfo = NULL;
 121         int ret = -ENODEV;
 122
 123         bus = pdev->bus->number;
 124         devnum = PCI_SLOT(pdev->devfn);
 125         func = PCI_FUNC(pdev->devfn);
 126         /* ACPI _ADR encoding for PCI bus: */
 127         addr = (acpi_integer)(devnum << 16 | func);
 128
 129         DEBPRINT("ENTER: pci %02x:%02x.%01x\n", bus, devnum, func);
 130
 131         dev_handle = DEVICE_ACPI_HANDLE(dev);
 132         if (!dev_handle) {
 133                 DEBPRINT("no acpi handle for device\n");
 134                 goto err;
 135         }
 136
 137         status = acpi_get_object_info(dev_handle, &buffer);
 138         if (ACPI_FAILURE(status)) {
 139                 DEBPRINT("get_object_info for device failed\n");
 140                 goto err;
 141         }
 142         dinfo = buffer.pointer;
 143         if (dinfo && (dinfo->valid & ACPI_VALID_ADR) &&
 144             dinfo->address == addr) {
 145                 *pcidevfn = addr;
 146                 *handle = dev_handle;
 147         } else {
 148                 DEBPRINT("get_object_info for device has wrong "
 149                         " address: %llu, should be %u\n",
 150                         dinfo ? (unsigned long long)dinfo->address : -1ULL,
 151                         (unsigned int)addr);
 152                 goto err;
 153         }
 154
 155         DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n",
 156                  devnum, func, (unsigned long long)addr, *handle);
 157         ret = 0;
 158 err:
 159         kfree(dinfo);
 160         return ret;
 161 }
 162
 163 /**
 164  * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif
 165  * @hwif: device to locate
 166  *
 167  * Retrieves the object handle for a given hwif.
 168  *
 169  * Returns handle on success, 0 on error.
 170  */
 171 static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif)
 172 {
 173         struct device           *dev = hwif->gendev.parent;
 174         acpi_handle             uninitialized_var(dev_handle);
 175         acpi_integer            pcidevfn;
 176         acpi_handle             chan_handle;
 177         int                     err;
 178
 179         DEBPRINT("ENTER: device %s\n", hwif->name);
 180
 181         if (!dev) {
 182                 DEBPRINT("no PCI device for %s\n", hwif->name);
 183                 return NULL;
 184         }
 185
 186         err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn);
 187         if (err < 0) {
 188                 DEBPRINT("ide_get_dev_handle failed (%d)\n", err);
 189                 return NULL;
 190         }
 191
 192         /* get child objects of dev_handle == channel objects,
 193          * + _their_ children == drive objects */
 194         /* channel is hwif->channel */
 195         chan_handle = acpi_get_child(dev_handle, hwif->channel);
 196         DEBPRINT("chan adr=%d: handle=0x%p\n",
 197                  hwif->channel, chan_handle);
 198
 199         return chan_handle;
 200 }
 201
 202 /**
 203  * do_drive_get_GTF - get the drive bootup default taskfile settings
 204  * @drive: the drive for which the taskfile settings should be retrieved
 205  * @gtf_length: number of bytes of _GTF data returned at @gtf_address
 206  * @gtf_address: buffer containing _GTF taskfile arrays
 207  *
 208  * The _GTF method has no input parameters.
 209  * It returns a variable number of register set values (registers
 210  * hex 1F1..1F7, taskfiles).
 211  * The <variable number> is not known in advance, so have ACPI-CA
 212  * allocate the buffer as needed and return it, then free it later.
 213  *
 214  * The returned @gtf_length and @gtf_address are only valid if the
 215  * function return value is 0.
 216  */
 217 static int do_drive_get_GTF(ide_drive_t *drive,
 218                      unsigned int *gtf_length, unsigned long *gtf_address,
 219                      unsigned long *obj_loc)
 220 {
 221         acpi_status                     status;
 222         struct acpi_buffer              output;
 223         union acpi_object               *out_obj;
 224         int                             err = -ENODEV;
 225
 226         *gtf_length = 0;
 227         *gtf_address = 0UL;
 228         *obj_loc = 0UL;
 229
 230         if (!drive->acpidata->obj_handle) {
 231                 DEBPRINT("No ACPI object found for %s\n", drive->name);
 232                 goto out;
 233         }
 234
 235         /* Setting up output buffer */
 236         output.length = ACPI_ALLOCATE_BUFFER;
 237         output.pointer = NULL;  /* ACPI-CA sets this; save/free it later */
 238
 239         /* _GTF has no input parameters */
 240         err = -EIO;
 241         status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF",
 242                                       NULL, &output);
 243         if (ACPI_FAILURE(status)) {
 244                 printk(KERN_DEBUG
 245                        "%s: Run _GTF error: status = 0x%x\n",
 246                        __func__, status);
 247                 goto out;
 248         }
 249
 250         if (!output.length || !output.pointer) {
 251                 DEBPRINT("Run _GTF: "
 252                        "length or ptr is NULL (0x%llx, 0x%p)\n",
 253                        (unsigned long long)output.length,
 254                        output.pointer);
 255                 goto out;
 256         }
 257
 258         out_obj = output.pointer;
 259         if (out_obj->type != ACPI_TYPE_BUFFER) {
 260                 DEBPRINT("Run _GTF: error: "
 261                        "expected object type of ACPI_TYPE_BUFFER, "
 262                        "got 0x%x\n", out_obj->type);
 263                 err = -ENOENT;
 264                 kfree(output.pointer);
 265                 goto out;
 266         }
 267
 268         if (!out_obj->buffer.length || !out_obj->buffer.pointer ||
 269             out_obj->buffer.length % REGS_PER_GTF) {
 270                 printk(KERN_ERR
 271                        "%s: unexpected GTF length (%d) or addr (0x%p)\n",
 272                        __func__, out_obj->buffer.length,
 273                        out_obj->buffer.pointer);
 274                 err = -ENOENT;
 275                 kfree(output.pointer);
 276                 goto out;
 277         }
 278
 279         *gtf_length = out_obj->buffer.length;
 280         *gtf_address = (unsigned long)out_obj->buffer.pointer;
 281         *obj_loc = (unsigned long)out_obj;
 282         DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n",
 283                  *gtf_length, *gtf_address, *obj_loc);
 284         err = 0;
 285 out:
 286         return err;
 287 }
 288
 289 /**
 290  * do_drive_set_taskfiles - write the drive taskfile settings from _GTF
 291  * @drive: the drive to which the taskfile command should be sent
 292  * @gtf_length: total number of bytes of _GTF taskfiles
 293  * @gtf_address: location of _GTF taskfile arrays
 294  *
 295  * Write {gtf_address, length gtf_length} in groups of
 296  * REGS_PER_GTF bytes.
 297  */
 298 static int do_drive_set_taskfiles(ide_drive_t *drive,
 299                                   unsigned int gtf_length,
 300                                   unsigned long gtf_address)
 301 {
 302         int                     rc = 0, err;
 303         int                     gtf_count = gtf_length / REGS_PER_GTF;
 304         int                     ix;
 305
 306         DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n",
 307                  gtf_length, gtf_length, gtf_count, gtf_address);
 308
 309         /* send all taskfile registers (0x1f1-0x1f7) *in*that*order* */
 310         for (ix = 0; ix < gtf_count; ix++) {
 311                 u8 *gtf = (u8 *)(gtf_address + ix * REGS_PER_GTF);
 312                 struct ide_cmd cmd;
 313
 314                 DEBPRINT("(0x1f1-1f7): "
 315                          "hex: %02x %02x %02x %02x %02x %02x %02x\n",
 316                          gtf[0], gtf[1], gtf[2],
 317                          gtf[3], gtf[4], gtf[5], gtf[6]);
 318
 319                 if (!ide_acpigtf) {
 320                         DEBPRINT("_GTF execution disabled\n");
 321                         continue;
 322                 }
 323
 324                 /* convert GTF to taskfile */
 325                 memset(&cmd, 0, sizeof(cmd));
 326                 memcpy(&cmd.tf.feature, gtf, REGS_PER_GTF);
 327                 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 328                 cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 329
 330                 err = ide_no_data_taskfile(drive, &cmd);
 331                 if (err) {
 332                         printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n",
 333                                         __func__, err);
 334                         rc = err;
 335                 }
 336         }
 337
 338         return rc;
 339 }
 340
 341 /**
 342  * ide_acpi_exec_tfs - get then write drive taskfile settings
 343  * @drive: the drive for which the taskfile settings should be
 344  *         written.
 345  *
 346  * According to the ACPI spec this should be called after _STM
 347  * has been evaluated for the interface. Some ACPI vendors interpret
 348  * that as a hard requirement and modify the taskfile according
 349  * to the Identify Drive information passed down with _STM.
 350  * So one should really make sure to call this only after _STM has
 351  * been executed.
 352  */
 353 int ide_acpi_exec_tfs(ide_drive_t *drive)
 354 {
 355         int             ret;
 356         unsigned int    gtf_length;
 357         unsigned long   gtf_address;
 358         unsigned long   obj_loc;
 359
 360         DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn);
 361
 362         ret = do_drive_get_GTF(drive, &gtf_length, &gtf_address, &obj_loc);
 363         if (ret < 0) {
 364                 DEBPRINT("get_GTF error (%d)\n", ret);
 365                 return ret;
 366         }
 367
 368         DEBPRINT("call set_taskfiles, drive=%s\n", drive->name);
 369
 370         ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address);
 371         kfree((void *)obj_loc);
 372         if (ret < 0) {
 373                 DEBPRINT("set_taskfiles error (%d)\n", ret);
 374         }
 375
 376         DEBPRINT("ret=%d\n", ret);
 377
 378         return ret;
 379 }
 380
 381 /**
 382  * ide_acpi_get_timing - get the channel (controller) timings
 383  * @hwif: target IDE interface (channel)
 384  *
 385  * This function executes the _GTM ACPI method for the target channel.
 386  *
 387  */
 388 void ide_acpi_get_timing(ide_hwif_t *hwif)
 389 {
 390         acpi_status             status;
 391         struct acpi_buffer      output;
 392         union acpi_object       *out_obj;
 393
 394         /* Setting up output buffer for _GTM */
 395         output.length = ACPI_ALLOCATE_BUFFER;
 396         output.pointer = NULL;  /* ACPI-CA sets this; save/free it later */
 397
 398         /* _GTM has no input parameters */
 399         status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM",
 400                                       NULL, &output);
 401
 402         DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n",
 403                  status, output.pointer,
 404                  (unsigned long long)output.length);
 405
 406         if (ACPI_FAILURE(status)) {
 407                 DEBPRINT("Run _GTM error: status = 0x%x\n", status);
 408                 return;
 409         }
 410
 411         if (!output.length || !output.pointer) {
 412                 DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n",
 413                        (unsigned long long)output.length,
 414                        output.pointer);
 415                 kfree(output.pointer);
 416                 return;
 417         }
 418
 419         out_obj = output.pointer;
 420         if (out_obj->type != ACPI_TYPE_BUFFER) {
 421                 kfree(output.pointer);
 422                 DEBPRINT("Run _GTM: error: "
 423                        "expected object type of ACPI_TYPE_BUFFER, "
 424                        "got 0x%x\n", out_obj->type);
 425                 return;
 426         }
 427
 428         if (!out_obj->buffer.length || !out_obj->buffer.pointer ||
 429             out_obj->buffer.length != sizeof(struct GTM_buffer)) {
 430                 kfree(output.pointer);
 431                 printk(KERN_ERR
 432                         "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or "
 433                         "addr (0x%p)\n",
 434                         __func__, out_obj->buffer.length,
 435                         sizeof(struct GTM_buffer), out_obj->buffer.pointer);
 436                 return;
 437         }
 438
 439         memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer,
 440                sizeof(struct GTM_buffer));
 441
 442         DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n",
 443                  out_obj->buffer.pointer, out_obj->buffer.length,
 444                  sizeof(struct GTM_buffer));
 445
 446         DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n",
 447                  hwif->acpidata->gtm.PIO_speed0,
 448                  hwif->acpidata->gtm.DMA_speed0,
 449                  hwif->acpidata->gtm.PIO_speed1,
 450                  hwif->acpidata->gtm.DMA_speed1,
 451                  hwif->acpidata->gtm.GTM_flags);
 452
 453         kfree(output.pointer);
 454 }
 455
 456 /**
 457  * ide_acpi_push_timing - set the channel (controller) timings
 458  * @hwif: target IDE interface (channel)
 459  *
 460  * This function executes the _STM ACPI method for the target channel.
 461  *
 462  * _STM requires Identify Drive data, which has to passed as an argument.
 463  * Unfortunately drive->id is a mangled version which we can't readily
 464  * use; hence we'll get the information afresh.
 465  */
 466 void ide_acpi_push_timing(ide_hwif_t *hwif)
 467 {
 468         acpi_status             status;
 469         struct acpi_object_list input;
 470         union acpi_object       in_params[3];
 471         struct ide_acpi_drive_link      *master = &hwif->acpidata->master;
 472         struct ide_acpi_drive_link      *slave = &hwif->acpidata->slave;
 473
 474         /* Give the GTM buffer + drive Identify data to the channel via the
 475          * _STM method: */
 476         /* setup input parameters buffer for _STM */
 477         input.count = 3;
 478         input.pointer = in_params;
 479         in_params[0].type = ACPI_TYPE_BUFFER;
 480         in_params[0].buffer.length = sizeof(struct GTM_buffer);
 481         in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm;
 482         in_params[1].type = ACPI_TYPE_BUFFER;
 483         in_params[1].buffer.length = ATA_ID_WORDS * 2;
 484         in_params[1].buffer.pointer = (u8 *)&master->idbuff;
 485         in_params[2].type = ACPI_TYPE_BUFFER;
 486         in_params[2].buffer.length = ATA_ID_WORDS * 2;
 487         in_params[2].buffer.pointer = (u8 *)&slave->idbuff;
 488         /* Output buffer: _STM has no output */
 489
 490         status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM",
 491                                       &input, NULL);
 492
 493         if (ACPI_FAILURE(status)) {
 494                 DEBPRINT("Run _STM error: status = 0x%x\n", status);
 495         }
 496         DEBPRINT("_STM status: %d\n", status);
 497 }
 498
 499 /**
 500  * ide_acpi_set_state - set the channel power state
 501  * @hwif: target IDE interface
 502  * @on: state, on/off
 503  *
 504  * This function executes the _PS0/_PS3 ACPI method to set the power state.
 505  * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
 506  */
 507 void ide_acpi_set_state(ide_hwif_t *hwif, int on)
 508 {
 509         ide_drive_t *drive;
 510         int i;
 511
 512         if (ide_noacpi_psx)
 513                 return;
 514
 515         DEBPRINT("ENTER:\n");
 516
 517         /* channel first and then drives for power on and verse versa for power off */
 518         if (on)
 519                 acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0);
 520
 521         ide_port_for_each_present_dev(i, drive, hwif) {
 522                 if (drive->acpidata->obj_handle)
 523                         acpi_bus_set_power(drive->acpidata->obj_handle,
 524                                            on ? ACPI_STATE_D0 : ACPI_STATE_D3);
 525         }
 526
 527         if (!on)
 528                 acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3);
 529 }
 530
 531 /**
 532  * ide_acpi_init_port - initialize the ACPI link for an IDE interface
 533  * @hwif: target IDE interface (channel)
 534  *
 535  * The ACPI spec is not quite clear when the drive identify buffer
 536  * should be obtained. Calling IDENTIFY DEVICE during shutdown
 537  * is not the best of ideas as the drive might already being put to
 538  * sleep. And obviously we can't call it during resume.
 539  * So we get the information during startup; but this means that
 540  * any changes during run-time will be lost after resume.
 541  */
 542 void ide_acpi_init_port(ide_hwif_t *hwif)
 543 {
 544         hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL);
 545         if (!hwif->acpidata)
 546                 return;
 547
 548         hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif);
 549         if (!hwif->acpidata->obj_handle) {
 550                 DEBPRINT("no ACPI object for %s found\n", hwif->name);
 551                 kfree(hwif->acpidata);
 552                 hwif->acpidata = NULL;
 553         }
 554 }
 555
 556 void ide_acpi_port_init_devices(ide_hwif_t *hwif)
 557 {
 558         ide_drive_t *drive;
 559         int i, err;
 560
 561         if (hwif->acpidata == NULL)
 562                 return;
 563
 564         /*
 565          * The ACPI spec mandates that we send information
 566          * for both drives, regardless whether they are connected
 567          * or not.
 568          */
 569         hwif->devices[0]->acpidata = &hwif->acpidata->master;
 570         hwif->devices[1]->acpidata = &hwif->acpidata->slave;
 571
 572         /* get _ADR info for each device */
 573         ide_port_for_each_present_dev(i, drive, hwif) {
 574                 acpi_handle dev_handle;
 575
 576                 DEBPRINT("ENTER: %s at channel#: %d port#: %d\n",
 577                          drive->name, hwif->channel, drive->dn & 1);
 578
 579                 /* TBD: could also check ACPI object VALID bits */
 580                 dev_handle = acpi_get_child(hwif->acpidata->obj_handle,
 581                                             drive->dn & 1);
 582
 583                 DEBPRINT("drive %s handle 0x%p\n", drive->name, dev_handle);
 584
 585                 drive->acpidata->obj_handle = dev_handle;
 586         }
 587
 588         /* send IDENTIFY for each device */
 589         ide_port_for_each_present_dev(i, drive, hwif) {
 590                 err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff);
 591                 if (err)
 592                         DEBPRINT("identify device %s failed (%d)\n",
 593                                  drive->name, err);
 594         }
 595
 596         if (ide_noacpi || ide_acpionboot == 0) {
 597                 DEBPRINT("ACPI methods disabled on boot\n");
 598                 return;
 599         }
 600
 601         /* ACPI _PS0 before _STM */
 602         ide_acpi_set_state(hwif, 1);
 603         /*
 604          * ACPI requires us to call _STM on startup
 605          */
 606         ide_acpi_get_timing(hwif);
 607         ide_acpi_push_timing(hwif);
 608
 609         ide_port_for_each_present_dev(i, drive, hwif) {
 610                 ide_acpi_exec_tfs(drive);
 611         }
 612 }