linux/include/linux/ata.h
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   1
   2/*
   3 *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
   4 *  Copyright 2003-2004 Jeff Garzik
   5 *
   6 *
   7 *  This program is free software; you can redistribute it and/or modify
   8 *  it under the terms of the GNU General Public License as published by
   9 *  the Free Software Foundation; either version 2, or (at your option)
  10 *  any later version.
  11 *
  12 *  This program is distributed in the hope that it will be useful,
  13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 *  GNU General Public License for more details.
  16 *
  17 *  You should have received a copy of the GNU General Public License
  18 *  along with this program; see the file COPYING.  If not, write to
  19 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20 *
  21 *
  22 *  libata documentation is available via 'make {ps|pdf}docs',
  23 *  as Documentation/DocBook/libata.*
  24 *
  25 *  Hardware documentation available from http://www.t13.org/
  26 *
  27 */
  28
  29#ifndef __LINUX_ATA_H__
  30#define __LINUX_ATA_H__
  31
  32#include <linux/kernel.h>
  33#include <linux/string.h>
  34#include <linux/types.h>
  35#include <asm/byteorder.h>
  36
  37/* defines only for the constants which don't work well as enums */
  38#define ATA_DMA_BOUNDARY        0xffffUL
  39#define ATA_DMA_MASK            0xffffffffULL
  40
  41enum {
  42        /* various global constants */
  43        ATA_MAX_DEVICES         = 2,    /* per bus/port */
  44        ATA_MAX_PRD             = 256,  /* we could make these 256/256 */
  45        ATA_SECT_SIZE           = 512,
  46        ATA_MAX_SECTORS_128     = 128,
  47        ATA_MAX_SECTORS         = 256,
  48        ATA_MAX_SECTORS_LBA48   = 65535,/* TODO: 65536? */
  49        ATA_MAX_SECTORS_TAPE    = 65535,
  50
  51        ATA_ID_WORDS            = 256,
  52        ATA_ID_CONFIG           = 0,
  53        ATA_ID_CYLS             = 1,
  54        ATA_ID_HEADS            = 3,
  55        ATA_ID_SECTORS          = 6,
  56        ATA_ID_SERNO            = 10,
  57        ATA_ID_BUF_SIZE         = 21,
  58        ATA_ID_FW_REV           = 23,
  59        ATA_ID_PROD             = 27,
  60        ATA_ID_MAX_MULTSECT     = 47,
  61        ATA_ID_DWORD_IO         = 48,
  62        ATA_ID_CAPABILITY       = 49,
  63        ATA_ID_OLD_PIO_MODES    = 51,
  64        ATA_ID_OLD_DMA_MODES    = 52,
  65        ATA_ID_FIELD_VALID      = 53,
  66        ATA_ID_CUR_CYLS         = 54,
  67        ATA_ID_CUR_HEADS        = 55,
  68        ATA_ID_CUR_SECTORS      = 56,
  69        ATA_ID_MULTSECT         = 59,
  70        ATA_ID_LBA_CAPACITY     = 60,
  71        ATA_ID_SWDMA_MODES      = 62,
  72        ATA_ID_MWDMA_MODES      = 63,
  73        ATA_ID_PIO_MODES        = 64,
  74        ATA_ID_EIDE_DMA_MIN     = 65,
  75        ATA_ID_EIDE_DMA_TIME    = 66,
  76        ATA_ID_EIDE_PIO         = 67,
  77        ATA_ID_EIDE_PIO_IORDY   = 68,
  78        ATA_ID_ADDITIONAL_SUPP  = 69,
  79        ATA_ID_QUEUE_DEPTH      = 75,
  80        ATA_ID_SATA_CAPABILITY  = 76,
  81        ATA_ID_SATA_CAPABILITY_2        = 77,
  82        ATA_ID_FEATURE_SUPP     = 78,
  83        ATA_ID_MAJOR_VER        = 80,
  84        ATA_ID_COMMAND_SET_1    = 82,
  85        ATA_ID_COMMAND_SET_2    = 83,
  86        ATA_ID_CFSSE            = 84,
  87        ATA_ID_CFS_ENABLE_1     = 85,
  88        ATA_ID_CFS_ENABLE_2     = 86,
  89        ATA_ID_CSF_DEFAULT      = 87,
  90        ATA_ID_UDMA_MODES       = 88,
  91        ATA_ID_HW_CONFIG        = 93,
  92        ATA_ID_SPG              = 98,
  93        ATA_ID_LBA_CAPACITY_2   = 100,
  94        ATA_ID_SECTOR_SIZE      = 106,
  95        ATA_ID_WWN              = 108,
  96        ATA_ID_LOGICAL_SECTOR_SIZE      = 117,  /* and 118 */
  97        ATA_ID_LAST_LUN         = 126,
  98        ATA_ID_DLF              = 128,
  99        ATA_ID_CSFO             = 129,
 100        ATA_ID_CFA_POWER        = 160,
 101        ATA_ID_CFA_KEY_MGMT     = 162,
 102        ATA_ID_CFA_MODES        = 163,
 103        ATA_ID_DATA_SET_MGMT    = 169,
 104        ATA_ID_ROT_SPEED        = 217,
 105        ATA_ID_PIO4             = (1 << 1),
 106
 107        ATA_ID_SERNO_LEN        = 20,
 108        ATA_ID_FW_REV_LEN       = 8,
 109        ATA_ID_PROD_LEN         = 40,
 110        ATA_ID_WWN_LEN          = 8,
 111
 112        ATA_PCI_CTL_OFS         = 2,
 113
 114        ATA_PIO0                = (1 << 0),
 115        ATA_PIO1                = ATA_PIO0 | (1 << 1),
 116        ATA_PIO2                = ATA_PIO1 | (1 << 2),
 117        ATA_PIO3                = ATA_PIO2 | (1 << 3),
 118        ATA_PIO4                = ATA_PIO3 | (1 << 4),
 119        ATA_PIO5                = ATA_PIO4 | (1 << 5),
 120        ATA_PIO6                = ATA_PIO5 | (1 << 6),
 121
 122        ATA_PIO4_ONLY           = (1 << 4),
 123
 124        ATA_SWDMA0              = (1 << 0),
 125        ATA_SWDMA1              = ATA_SWDMA0 | (1 << 1),
 126        ATA_SWDMA2              = ATA_SWDMA1 | (1 << 2),
 127
 128        ATA_SWDMA2_ONLY         = (1 << 2),
 129
 130        ATA_MWDMA0              = (1 << 0),
 131        ATA_MWDMA1              = ATA_MWDMA0 | (1 << 1),
 132        ATA_MWDMA2              = ATA_MWDMA1 | (1 << 2),
 133        ATA_MWDMA3              = ATA_MWDMA2 | (1 << 3),
 134        ATA_MWDMA4              = ATA_MWDMA3 | (1 << 4),
 135
 136        ATA_MWDMA12_ONLY        = (1 << 1) | (1 << 2),
 137        ATA_MWDMA2_ONLY         = (1 << 2),
 138
 139        ATA_UDMA0               = (1 << 0),
 140        ATA_UDMA1               = ATA_UDMA0 | (1 << 1),
 141        ATA_UDMA2               = ATA_UDMA1 | (1 << 2),
 142        ATA_UDMA3               = ATA_UDMA2 | (1 << 3),
 143        ATA_UDMA4               = ATA_UDMA3 | (1 << 4),
 144        ATA_UDMA5               = ATA_UDMA4 | (1 << 5),
 145        ATA_UDMA6               = ATA_UDMA5 | (1 << 6),
 146        ATA_UDMA7               = ATA_UDMA6 | (1 << 7),
 147        /* ATA_UDMA7 is just for completeness... doesn't exist (yet?).  */
 148
 149        ATA_UDMA24_ONLY         = (1 << 2) | (1 << 4),
 150
 151        ATA_UDMA_MASK_40C       = ATA_UDMA2,    /* udma0-2 */
 152
 153        /* DMA-related */
 154        ATA_PRD_SZ              = 8,
 155        ATA_PRD_TBL_SZ          = (ATA_MAX_PRD * ATA_PRD_SZ),
 156        ATA_PRD_EOT             = (1 << 31),    /* end-of-table flag */
 157
 158        ATA_DMA_TABLE_OFS       = 4,
 159        ATA_DMA_STATUS          = 2,
 160        ATA_DMA_CMD             = 0,
 161        ATA_DMA_WR              = (1 << 3),
 162        ATA_DMA_START           = (1 << 0),
 163        ATA_DMA_INTR            = (1 << 2),
 164        ATA_DMA_ERR             = (1 << 1),
 165        ATA_DMA_ACTIVE          = (1 << 0),
 166
 167        /* bits in ATA command block registers */
 168        ATA_HOB                 = (1 << 7),     /* LBA48 selector */
 169        ATA_NIEN                = (1 << 1),     /* disable-irq flag */
 170        ATA_LBA                 = (1 << 6),     /* LBA28 selector */
 171        ATA_DEV1                = (1 << 4),     /* Select Device 1 (slave) */
 172        ATA_DEVICE_OBS          = (1 << 7) | (1 << 5), /* obs bits in dev reg */
 173        ATA_DEVCTL_OBS          = (1 << 3),     /* obsolete bit in devctl reg */
 174        ATA_BUSY                = (1 << 7),     /* BSY status bit */
 175        ATA_DRDY                = (1 << 6),     /* device ready */
 176        ATA_DF                  = (1 << 5),     /* device fault */
 177        ATA_DSC                 = (1 << 4),     /* drive seek complete */
 178        ATA_DRQ                 = (1 << 3),     /* data request i/o */
 179        ATA_CORR                = (1 << 2),     /* corrected data error */
 180        ATA_IDX                 = (1 << 1),     /* index */
 181        ATA_ERR                 = (1 << 0),     /* have an error */
 182        ATA_SRST                = (1 << 2),     /* software reset */
 183        ATA_ICRC                = (1 << 7),     /* interface CRC error */
 184        ATA_BBK                 = ATA_ICRC,     /* pre-EIDE: block marked bad */
 185        ATA_UNC                 = (1 << 6),     /* uncorrectable media error */
 186        ATA_MC                  = (1 << 5),     /* media changed */
 187        ATA_IDNF                = (1 << 4),     /* ID not found */
 188        ATA_MCR                 = (1 << 3),     /* media change requested */
 189        ATA_ABORTED             = (1 << 2),     /* command aborted */
 190        ATA_TRK0NF              = (1 << 1),     /* track 0 not found */
 191        ATA_AMNF                = (1 << 0),     /* address mark not found */
 192        ATAPI_LFS               = 0xF0,         /* last failed sense */
 193        ATAPI_EOM               = ATA_TRK0NF,   /* end of media */
 194        ATAPI_ILI               = ATA_AMNF,     /* illegal length indication */
 195        ATAPI_IO                = (1 << 1),
 196        ATAPI_COD               = (1 << 0),
 197
 198        /* ATA command block registers */
 199        ATA_REG_DATA            = 0x00,
 200        ATA_REG_ERR             = 0x01,
 201        ATA_REG_NSECT           = 0x02,
 202        ATA_REG_LBAL            = 0x03,
 203        ATA_REG_LBAM            = 0x04,
 204        ATA_REG_LBAH            = 0x05,
 205        ATA_REG_DEVICE          = 0x06,
 206        ATA_REG_STATUS          = 0x07,
 207
 208        ATA_REG_FEATURE         = ATA_REG_ERR, /* and their aliases */
 209        ATA_REG_CMD             = ATA_REG_STATUS,
 210        ATA_REG_BYTEL           = ATA_REG_LBAM,
 211        ATA_REG_BYTEH           = ATA_REG_LBAH,
 212        ATA_REG_DEVSEL          = ATA_REG_DEVICE,
 213        ATA_REG_IRQ             = ATA_REG_NSECT,
 214
 215        /* ATA device commands */
 216        ATA_CMD_DEV_RESET       = 0x08, /* ATAPI device reset */
 217        ATA_CMD_CHK_POWER       = 0xE5, /* check power mode */
 218        ATA_CMD_STANDBY         = 0xE2, /* place in standby power mode */
 219        ATA_CMD_IDLE            = 0xE3, /* place in idle power mode */
 220        ATA_CMD_EDD             = 0x90, /* execute device diagnostic */
 221        ATA_CMD_DOWNLOAD_MICRO  = 0x92,
 222        ATA_CMD_NOP             = 0x00,
 223        ATA_CMD_FLUSH           = 0xE7,
 224        ATA_CMD_FLUSH_EXT       = 0xEA,
 225        ATA_CMD_ID_ATA          = 0xEC,
 226        ATA_CMD_ID_ATAPI        = 0xA1,
 227        ATA_CMD_SERVICE         = 0xA2,
 228        ATA_CMD_READ            = 0xC8,
 229        ATA_CMD_READ_EXT        = 0x25,
 230        ATA_CMD_READ_QUEUED     = 0x26,
 231        ATA_CMD_READ_STREAM_EXT = 0x2B,
 232        ATA_CMD_READ_STREAM_DMA_EXT = 0x2A,
 233        ATA_CMD_WRITE           = 0xCA,
 234        ATA_CMD_WRITE_EXT       = 0x35,
 235        ATA_CMD_WRITE_QUEUED    = 0x36,
 236        ATA_CMD_WRITE_STREAM_EXT = 0x3B,
 237        ATA_CMD_WRITE_STREAM_DMA_EXT = 0x3A,
 238        ATA_CMD_WRITE_FUA_EXT   = 0x3D,
 239        ATA_CMD_WRITE_QUEUED_FUA_EXT = 0x3E,
 240        ATA_CMD_FPDMA_READ      = 0x60,
 241        ATA_CMD_FPDMA_WRITE     = 0x61,
 242        ATA_CMD_PIO_READ        = 0x20,
 243        ATA_CMD_PIO_READ_EXT    = 0x24,
 244        ATA_CMD_PIO_WRITE       = 0x30,
 245        ATA_CMD_PIO_WRITE_EXT   = 0x34,
 246        ATA_CMD_READ_MULTI      = 0xC4,
 247        ATA_CMD_READ_MULTI_EXT  = 0x29,
 248        ATA_CMD_WRITE_MULTI     = 0xC5,
 249        ATA_CMD_WRITE_MULTI_EXT = 0x39,
 250        ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
 251        ATA_CMD_SET_FEATURES    = 0xEF,
 252        ATA_CMD_SET_MULTI       = 0xC6,
 253        ATA_CMD_PACKET          = 0xA0,
 254        ATA_CMD_VERIFY          = 0x40,
 255        ATA_CMD_VERIFY_EXT      = 0x42,
 256        ATA_CMD_WRITE_UNCORR_EXT = 0x45,
 257        ATA_CMD_STANDBYNOW1     = 0xE0,
 258        ATA_CMD_IDLEIMMEDIATE   = 0xE1,
 259        ATA_CMD_SLEEP           = 0xE6,
 260        ATA_CMD_INIT_DEV_PARAMS = 0x91,
 261        ATA_CMD_READ_NATIVE_MAX = 0xF8,
 262        ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
 263        ATA_CMD_SET_MAX         = 0xF9,
 264        ATA_CMD_SET_MAX_EXT     = 0x37,
 265        ATA_CMD_READ_LOG_EXT    = 0x2F,
 266        ATA_CMD_WRITE_LOG_EXT   = 0x3F,
 267        ATA_CMD_READ_LOG_DMA_EXT = 0x47,
 268        ATA_CMD_WRITE_LOG_DMA_EXT = 0x57,
 269        ATA_CMD_TRUSTED_RCV     = 0x5C,
 270        ATA_CMD_TRUSTED_RCV_DMA = 0x5D,
 271        ATA_CMD_TRUSTED_SND     = 0x5E,
 272        ATA_CMD_TRUSTED_SND_DMA = 0x5F,
 273        ATA_CMD_PMP_READ        = 0xE4,
 274        ATA_CMD_PMP_WRITE       = 0xE8,
 275        ATA_CMD_CONF_OVERLAY    = 0xB1,
 276        ATA_CMD_SEC_SET_PASS    = 0xF1,
 277        ATA_CMD_SEC_UNLOCK      = 0xF2,
 278        ATA_CMD_SEC_ERASE_PREP  = 0xF3,
 279        ATA_CMD_SEC_ERASE_UNIT  = 0xF4,
 280        ATA_CMD_SEC_FREEZE_LOCK = 0xF5,
 281        ATA_CMD_SEC_DISABLE_PASS = 0xF6,
 282        ATA_CMD_CONFIG_STREAM   = 0x51,
 283        ATA_CMD_SMART           = 0xB0,
 284        ATA_CMD_MEDIA_LOCK      = 0xDE,
 285        ATA_CMD_MEDIA_UNLOCK    = 0xDF,
 286        ATA_CMD_DSM             = 0x06,
 287        ATA_CMD_CHK_MED_CRD_TYP = 0xD1,
 288        ATA_CMD_CFA_REQ_EXT_ERR = 0x03,
 289        ATA_CMD_CFA_WRITE_NE    = 0x38,
 290        ATA_CMD_CFA_TRANS_SECT  = 0x87,
 291        ATA_CMD_CFA_ERASE       = 0xC0,
 292        ATA_CMD_CFA_WRITE_MULT_NE = 0xCD,
 293        /* marked obsolete in the ATA/ATAPI-7 spec */
 294        ATA_CMD_RESTORE         = 0x10,
 295
 296        /* READ_LOG_EXT pages */
 297        ATA_LOG_SATA_NCQ        = 0x10,
 298        ATA_LOG_SATA_ID_DEV_DATA  = 0x30,
 299        ATA_LOG_SATA_SETTINGS     = 0x08,
 300        ATA_LOG_DEVSLP_MDAT       = 0x30,
 301        ATA_LOG_DEVSLP_MDAT_MASK  = 0x1F,
 302        ATA_LOG_DEVSLP_DETO       = 0x31,
 303        ATA_LOG_DEVSLP_VALID      = 0x37,
 304        ATA_LOG_DEVSLP_VALID_MASK = 0x80,
 305
 306        /* READ/WRITE LONG (obsolete) */
 307        ATA_CMD_READ_LONG       = 0x22,
 308        ATA_CMD_READ_LONG_ONCE  = 0x23,
 309        ATA_CMD_WRITE_LONG      = 0x32,
 310        ATA_CMD_WRITE_LONG_ONCE = 0x33,
 311
 312        /* SETFEATURES stuff */
 313        SETFEATURES_XFER        = 0x03,
 314        XFER_UDMA_7             = 0x47,
 315        XFER_UDMA_6             = 0x46,
 316        XFER_UDMA_5             = 0x45,
 317        XFER_UDMA_4             = 0x44,
 318        XFER_UDMA_3             = 0x43,
 319        XFER_UDMA_2             = 0x42,
 320        XFER_UDMA_1             = 0x41,
 321        XFER_UDMA_0             = 0x40,
 322        XFER_MW_DMA_4           = 0x24, /* CFA only */
 323        XFER_MW_DMA_3           = 0x23, /* CFA only */
 324        XFER_MW_DMA_2           = 0x22,
 325        XFER_MW_DMA_1           = 0x21,
 326        XFER_MW_DMA_0           = 0x20,
 327        XFER_SW_DMA_2           = 0x12,
 328        XFER_SW_DMA_1           = 0x11,
 329        XFER_SW_DMA_0           = 0x10,
 330        XFER_PIO_6              = 0x0E, /* CFA only */
 331        XFER_PIO_5              = 0x0D, /* CFA only */
 332        XFER_PIO_4              = 0x0C,
 333        XFER_PIO_3              = 0x0B,
 334        XFER_PIO_2              = 0x0A,
 335        XFER_PIO_1              = 0x09,
 336        XFER_PIO_0              = 0x08,
 337        XFER_PIO_SLOW           = 0x00,
 338
 339        SETFEATURES_WC_ON       = 0x02, /* Enable write cache */
 340        SETFEATURES_WC_OFF      = 0x82, /* Disable write cache */
 341
 342        /* Enable/Disable Automatic Acoustic Management */
 343        SETFEATURES_AAM_ON      = 0x42,
 344        SETFEATURES_AAM_OFF     = 0xC2,
 345
 346        SETFEATURES_SPINUP      = 0x07, /* Spin-up drive */
 347
 348        SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
 349        SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
 350
 351        /* SETFEATURE Sector counts for SATA features */
 352        SATA_FPDMA_OFFSET       = 0x01, /* FPDMA non-zero buffer offsets */
 353        SATA_FPDMA_AA           = 0x02, /* FPDMA Setup FIS Auto-Activate */
 354        SATA_DIPM               = 0x03, /* Device Initiated Power Management */
 355        SATA_FPDMA_IN_ORDER     = 0x04, /* FPDMA in-order data delivery */
 356        SATA_AN                 = 0x05, /* Asynchronous Notification */
 357        SATA_SSP                = 0x06, /* Software Settings Preservation */
 358        SATA_DEVSLP             = 0x09, /* Device Sleep */
 359
 360        /* feature values for SET_MAX */
 361        ATA_SET_MAX_ADDR        = 0x00,
 362        ATA_SET_MAX_PASSWD      = 0x01,
 363        ATA_SET_MAX_LOCK        = 0x02,
 364        ATA_SET_MAX_UNLOCK      = 0x03,
 365        ATA_SET_MAX_FREEZE_LOCK = 0x04,
 366
 367        /* feature values for DEVICE CONFIGURATION OVERLAY */
 368        ATA_DCO_RESTORE         = 0xC0,
 369        ATA_DCO_FREEZE_LOCK     = 0xC1,
 370        ATA_DCO_IDENTIFY        = 0xC2,
 371        ATA_DCO_SET             = 0xC3,
 372
 373        /* feature values for SMART */
 374        ATA_SMART_ENABLE        = 0xD8,
 375        ATA_SMART_READ_VALUES   = 0xD0,
 376        ATA_SMART_READ_THRESHOLDS = 0xD1,
 377
 378        /* feature values for Data Set Management */
 379        ATA_DSM_TRIM            = 0x01,
 380
 381        /* password used in LBA Mid / LBA High for executing SMART commands */
 382        ATA_SMART_LBAM_PASS     = 0x4F,
 383        ATA_SMART_LBAH_PASS     = 0xC2,
 384
 385        /* ATAPI stuff */
 386        ATAPI_PKT_DMA           = (1 << 0),
 387        ATAPI_DMADIR            = (1 << 2),     /* ATAPI data dir:
 388                                                   0=to device, 1=to host */
 389        ATAPI_CDB_LEN           = 16,
 390
 391        /* PMP stuff */
 392        SATA_PMP_MAX_PORTS      = 15,
 393        SATA_PMP_CTRL_PORT      = 15,
 394
 395        SATA_PMP_GSCR_DWORDS    = 128,
 396        SATA_PMP_GSCR_PROD_ID   = 0,
 397        SATA_PMP_GSCR_REV       = 1,
 398        SATA_PMP_GSCR_PORT_INFO = 2,
 399        SATA_PMP_GSCR_ERROR     = 32,
 400        SATA_PMP_GSCR_ERROR_EN  = 33,
 401        SATA_PMP_GSCR_FEAT      = 64,
 402        SATA_PMP_GSCR_FEAT_EN   = 96,
 403
 404        SATA_PMP_PSCR_STATUS    = 0,
 405        SATA_PMP_PSCR_ERROR     = 1,
 406        SATA_PMP_PSCR_CONTROL   = 2,
 407
 408        SATA_PMP_FEAT_BIST      = (1 << 0),
 409        SATA_PMP_FEAT_PMREQ     = (1 << 1),
 410        SATA_PMP_FEAT_DYNSSC    = (1 << 2),
 411        SATA_PMP_FEAT_NOTIFY    = (1 << 3),
 412
 413        /* cable types */
 414        ATA_CBL_NONE            = 0,
 415        ATA_CBL_PATA40          = 1,
 416        ATA_CBL_PATA80          = 2,
 417        ATA_CBL_PATA40_SHORT    = 3,    /* 40 wire cable to high UDMA spec */
 418        ATA_CBL_PATA_UNK        = 4,    /* don't know, maybe 80c? */
 419        ATA_CBL_PATA_IGN        = 5,    /* don't know, ignore cable handling */
 420        ATA_CBL_SATA            = 6,
 421
 422        /* SATA Status and Control Registers */
 423        SCR_STATUS              = 0,
 424        SCR_ERROR               = 1,
 425        SCR_CONTROL             = 2,
 426        SCR_ACTIVE              = 3,
 427        SCR_NOTIFICATION        = 4,
 428
 429        /* SError bits */
 430        SERR_DATA_RECOVERED     = (1 << 0), /* recovered data error */
 431        SERR_COMM_RECOVERED     = (1 << 1), /* recovered comm failure */
 432        SERR_DATA               = (1 << 8), /* unrecovered data error */
 433        SERR_PERSISTENT         = (1 << 9), /* persistent data/comm error */
 434        SERR_PROTOCOL           = (1 << 10), /* protocol violation */
 435        SERR_INTERNAL           = (1 << 11), /* host internal error */
 436        SERR_PHYRDY_CHG         = (1 << 16), /* PHY RDY changed */
 437        SERR_PHY_INT_ERR        = (1 << 17), /* PHY internal error */
 438        SERR_COMM_WAKE          = (1 << 18), /* Comm wake */
 439        SERR_10B_8B_ERR         = (1 << 19), /* 10b to 8b decode error */
 440        SERR_DISPARITY          = (1 << 20), /* Disparity */
 441        SERR_CRC                = (1 << 21), /* CRC error */
 442        SERR_HANDSHAKE          = (1 << 22), /* Handshake error */
 443        SERR_LINK_SEQ_ERR       = (1 << 23), /* Link sequence error */
 444        SERR_TRANS_ST_ERROR     = (1 << 24), /* Transport state trans. error */
 445        SERR_UNRECOG_FIS        = (1 << 25), /* Unrecognized FIS */
 446        SERR_DEV_XCHG           = (1 << 26), /* device exchanged */
 447
 448        /* struct ata_taskfile flags */
 449        ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
 450        ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
 451        ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
 452        ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
 453        ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
 454        ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
 455        ATA_TFLAG_POLLING       = (1 << 6), /* set nIEN to 1 and use polling */
 456
 457        /* protocol flags */
 458        ATA_PROT_FLAG_PIO       = (1 << 0), /* is PIO */
 459        ATA_PROT_FLAG_DMA       = (1 << 1), /* is DMA */
 460        ATA_PROT_FLAG_DATA      = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
 461        ATA_PROT_FLAG_NCQ       = (1 << 2), /* is NCQ */
 462        ATA_PROT_FLAG_ATAPI     = (1 << 3), /* is ATAPI */
 463};
 464
 465enum ata_tf_protocols {
 466        /* ATA taskfile protocols */
 467        ATA_PROT_UNKNOWN,       /* unknown/invalid */
 468        ATA_PROT_NODATA,        /* no data */
 469        ATA_PROT_PIO,           /* PIO data xfer */
 470        ATA_PROT_DMA,           /* DMA */
 471        ATA_PROT_NCQ,           /* NCQ */
 472        ATAPI_PROT_NODATA,      /* packet command, no data */
 473        ATAPI_PROT_PIO,         /* packet command, PIO data xfer*/
 474        ATAPI_PROT_DMA,         /* packet command with special DMA sauce */
 475};
 476
 477enum ata_ioctls {
 478        ATA_IOC_GET_IO32        = 0x309,
 479        ATA_IOC_SET_IO32        = 0x324,
 480};
 481
 482/* core structures */
 483
 484struct ata_bmdma_prd {
 485        __le32                  addr;
 486        __le32                  flags_len;
 487};
 488
 489struct ata_taskfile {
 490        unsigned long           flags;          /* ATA_TFLAG_xxx */
 491        u8                      protocol;       /* ATA_PROT_xxx */
 492
 493        u8                      ctl;            /* control reg */
 494
 495        u8                      hob_feature;    /* additional data */
 496        u8                      hob_nsect;      /* to support LBA48 */
 497        u8                      hob_lbal;
 498        u8                      hob_lbam;
 499        u8                      hob_lbah;
 500
 501        u8                      feature;
 502        u8                      nsect;
 503        u8                      lbal;
 504        u8                      lbam;
 505        u8                      lbah;
 506
 507        u8                      device;
 508
 509        u8                      command;        /* IO operation */
 510};
 511
 512/*
 513 * protocol tests
 514 */
 515static inline unsigned int ata_prot_flags(u8 prot)
 516{
 517        switch (prot) {
 518        case ATA_PROT_NODATA:
 519                return 0;
 520        case ATA_PROT_PIO:
 521                return ATA_PROT_FLAG_PIO;
 522        case ATA_PROT_DMA:
 523                return ATA_PROT_FLAG_DMA;
 524        case ATA_PROT_NCQ:
 525                return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
 526        case ATAPI_PROT_NODATA:
 527                return ATA_PROT_FLAG_ATAPI;
 528        case ATAPI_PROT_PIO:
 529                return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
 530        case ATAPI_PROT_DMA:
 531                return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
 532        }
 533        return 0;
 534}
 535
 536static inline int ata_is_atapi(u8 prot)
 537{
 538        return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
 539}
 540
 541static inline int ata_is_nodata(u8 prot)
 542{
 543        return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
 544}
 545
 546static inline int ata_is_pio(u8 prot)
 547{
 548        return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
 549}
 550
 551static inline int ata_is_dma(u8 prot)
 552{
 553        return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
 554}
 555
 556static inline int ata_is_ncq(u8 prot)
 557{
 558        return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
 559}
 560
 561static inline int ata_is_data(u8 prot)
 562{
 563        return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
 564}
 565
 566/*
 567 * id tests
 568 */
 569#define ata_id_is_ata(id)       (((id)[ATA_ID_CONFIG] & (1 << 15)) == 0)
 570#define ata_id_has_lba(id)      ((id)[ATA_ID_CAPABILITY] & (1 << 9))
 571#define ata_id_has_dma(id)      ((id)[ATA_ID_CAPABILITY] & (1 << 8))
 572#define ata_id_has_ncq(id)      ((id)[ATA_ID_SATA_CAPABILITY] & (1 << 8))
 573#define ata_id_queue_depth(id)  (((id)[ATA_ID_QUEUE_DEPTH] & 0x1f) + 1)
 574#define ata_id_removeable(id)   ((id)[ATA_ID_CONFIG] & (1 << 7))
 575#define ata_id_has_atapi_AN(id) \
 576        ((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
 577          ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
 578         ((id)[ATA_ID_FEATURE_SUPP] & (1 << 5)))
 579#define ata_id_has_fpdma_aa(id) \
 580        ((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
 581          ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
 582         ((id)[ATA_ID_FEATURE_SUPP] & (1 << 2)))
 583#define ata_id_iordy_disable(id) ((id)[ATA_ID_CAPABILITY] & (1 << 10))
 584#define ata_id_has_iordy(id) ((id)[ATA_ID_CAPABILITY] & (1 << 11))
 585#define ata_id_u32(id,n)        \
 586        (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
 587#define ata_id_u64(id,n)        \
 588        ( ((u64) (id)[(n) + 3] << 48) | \
 589          ((u64) (id)[(n) + 2] << 32) | \
 590          ((u64) (id)[(n) + 1] << 16) | \
 591          ((u64) (id)[(n) + 0]) )
 592
 593#define ata_id_cdb_intr(id)     (((id)[ATA_ID_CONFIG] & 0x60) == 0x20)
 594#define ata_id_has_da(id)       ((id)[ATA_ID_SATA_CAPABILITY_2] & (1 << 4))
 595#define ata_id_has_devslp(id)   ((id)[ATA_ID_FEATURE_SUPP] & (1 << 8))
 596
 597static inline bool ata_id_has_hipm(const u16 *id)
 598{
 599        u16 val = id[ATA_ID_SATA_CAPABILITY];
 600
 601        if (val == 0 || val == 0xffff)
 602                return false;
 603
 604        return val & (1 << 9);
 605}
 606
 607static inline bool ata_id_has_dipm(const u16 *id)
 608{
 609        u16 val = id[ATA_ID_FEATURE_SUPP];
 610
 611        if (val == 0 || val == 0xffff)
 612                return false;
 613
 614        return val & (1 << 3);
 615}
 616
 617
 618static inline bool ata_id_has_fua(const u16 *id)
 619{
 620        if ((id[ATA_ID_CFSSE] & 0xC000) != 0x4000)
 621                return false;
 622        return id[ATA_ID_CFSSE] & (1 << 6);
 623}
 624
 625static inline bool ata_id_has_flush(const u16 *id)
 626{
 627        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 628                return false;
 629        return id[ATA_ID_COMMAND_SET_2] & (1 << 12);
 630}
 631
 632static inline bool ata_id_flush_enabled(const u16 *id)
 633{
 634        if (ata_id_has_flush(id) == 0)
 635                return false;
 636        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 637                return false;
 638        return id[ATA_ID_CFS_ENABLE_2] & (1 << 12);
 639}
 640
 641static inline bool ata_id_has_flush_ext(const u16 *id)
 642{
 643        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 644                return false;
 645        return id[ATA_ID_COMMAND_SET_2] & (1 << 13);
 646}
 647
 648static inline bool ata_id_flush_ext_enabled(const u16 *id)
 649{
 650        if (ata_id_has_flush_ext(id) == 0)
 651                return false;
 652        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 653                return false;
 654        /*
 655         * some Maxtor disks have bit 13 defined incorrectly
 656         * so check bit 10 too
 657         */
 658        return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
 659}
 660
 661static inline u32 ata_id_logical_sector_size(const u16 *id)
 662{
 663        /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
 664         * IDENTIFY DEVICE data, word 117-118.
 665         * 0xd000 ignores bit 13 (logical:physical > 1)
 666         */
 667        if ((id[ATA_ID_SECTOR_SIZE] & 0xd000) == 0x5000)
 668                return (((id[ATA_ID_LOGICAL_SECTOR_SIZE+1] << 16)
 669                         + id[ATA_ID_LOGICAL_SECTOR_SIZE]) * sizeof(u16)) ;
 670        return ATA_SECT_SIZE;
 671}
 672
 673static inline u8 ata_id_log2_per_physical_sector(const u16 *id)
 674{
 675        /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
 676         * IDENTIFY DEVICE data, word 106.
 677         * 0xe000 ignores bit 12 (logical sector > 512 bytes)
 678         */
 679        if ((id[ATA_ID_SECTOR_SIZE] & 0xe000) == 0x6000)
 680                return (id[ATA_ID_SECTOR_SIZE] & 0xf);
 681        return 0;
 682}
 683
 684/* Offset of logical sectors relative to physical sectors.
 685 *
 686 * If device has more than one logical sector per physical sector
 687 * (aka 512 byte emulation), vendors might offset the "sector 0" address
 688 * so sector 63 is "naturally aligned" - e.g. FAT partition table.
 689 * This avoids Read/Mod/Write penalties when using FAT partition table
 690 * and updating "well aligned" (FS perspective) physical sectors on every
 691 * transaction.
 692 */
 693static inline u16 ata_id_logical_sector_offset(const u16 *id,
 694         u8 log2_per_phys)
 695{
 696        u16 word_209 = id[209];
 697
 698        if ((log2_per_phys > 1) && (word_209 & 0xc000) == 0x4000) {
 699                u16 first = word_209 & 0x3fff;
 700                if (first > 0)
 701                        return (1 << log2_per_phys) - first;
 702        }
 703        return 0;
 704}
 705
 706static inline bool ata_id_has_lba48(const u16 *id)
 707{
 708        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 709                return false;
 710        if (!ata_id_u64(id, ATA_ID_LBA_CAPACITY_2))
 711                return false;
 712        return id[ATA_ID_COMMAND_SET_2] & (1 << 10);
 713}
 714
 715static inline bool ata_id_lba48_enabled(const u16 *id)
 716{
 717        if (ata_id_has_lba48(id) == 0)
 718                return false;
 719        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 720                return false;
 721        return id[ATA_ID_CFS_ENABLE_2] & (1 << 10);
 722}
 723
 724static inline bool ata_id_hpa_enabled(const u16 *id)
 725{
 726        /* Yes children, word 83 valid bits cover word 82 data */
 727        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 728                return false;
 729        /* And 87 covers 85-87 */
 730        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 731                return false;
 732        /* Check command sets enabled as well as supported */
 733        if ((id[ATA_ID_CFS_ENABLE_1] & (1 << 10)) == 0)
 734                return false;
 735        return id[ATA_ID_COMMAND_SET_1] & (1 << 10);
 736}
 737
 738static inline bool ata_id_has_wcache(const u16 *id)
 739{
 740        /* Yes children, word 83 valid bits cover word 82 data */
 741        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 742                return false;
 743        return id[ATA_ID_COMMAND_SET_1] & (1 << 5);
 744}
 745
 746static inline bool ata_id_has_pm(const u16 *id)
 747{
 748        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 749                return false;
 750        return id[ATA_ID_COMMAND_SET_1] & (1 << 3);
 751}
 752
 753static inline bool ata_id_rahead_enabled(const u16 *id)
 754{
 755        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 756                return false;
 757        return id[ATA_ID_CFS_ENABLE_1] & (1 << 6);
 758}
 759
 760static inline bool ata_id_wcache_enabled(const u16 *id)
 761{
 762        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 763                return false;
 764        return id[ATA_ID_CFS_ENABLE_1] & (1 << 5);
 765}
 766
 767/**
 768 *      ata_id_major_version    -       get ATA level of drive
 769 *      @id: Identify data
 770 *
 771 *      Caveats:
 772 *              ATA-1 considers identify optional
 773 *              ATA-2 introduces mandatory identify
 774 *              ATA-3 introduces word 80 and accurate reporting
 775 *
 776 *      The practical impact of this is that ata_id_major_version cannot
 777 *      reliably report on drives below ATA3.
 778 */
 779
 780static inline unsigned int ata_id_major_version(const u16 *id)
 781{
 782        unsigned int mver;
 783
 784        if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
 785                return 0;
 786
 787        for (mver = 14; mver >= 1; mver--)
 788                if (id[ATA_ID_MAJOR_VER] & (1 << mver))
 789                        break;
 790        return mver;
 791}
 792
 793static inline bool ata_id_is_sata(const u16 *id)
 794{
 795        /*
 796         * See if word 93 is 0 AND drive is at least ATA-5 compatible
 797         * verifying that word 80 by casting it to a signed type --
 798         * this trick allows us to filter out the reserved values of
 799         * 0x0000 and 0xffff along with the earlier ATA revisions...
 800         */
 801        if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020)
 802                return true;
 803        return false;
 804}
 805
 806static inline bool ata_id_has_tpm(const u16 *id)
 807{
 808        /* The TPM bits are only valid on ATA8 */
 809        if (ata_id_major_version(id) < 8)
 810                return false;
 811        if ((id[48] & 0xC000) != 0x4000)
 812                return false;
 813        return id[48] & (1 << 0);
 814}
 815
 816static inline bool ata_id_has_dword_io(const u16 *id)
 817{
 818        /* ATA 8 reuses this flag for "trusted" computing */
 819        if (ata_id_major_version(id) > 7)
 820                return false;
 821        return id[ATA_ID_DWORD_IO] & (1 << 0);
 822}
 823
 824static inline bool ata_id_has_unload(const u16 *id)
 825{
 826        if (ata_id_major_version(id) >= 7 &&
 827            (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 &&
 828            id[ATA_ID_CFSSE] & (1 << 13))
 829                return true;
 830        return false;
 831}
 832
 833static inline bool ata_id_has_wwn(const u16 *id)
 834{
 835        return (id[ATA_ID_CSF_DEFAULT] & 0xC100) == 0x4100;
 836}
 837
 838static inline int ata_id_form_factor(const u16 *id)
 839{
 840        u16 val = id[168];
 841
 842        if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
 843                return 0;
 844
 845        val &= 0xf;
 846
 847        if (val > 5)
 848                return 0;
 849
 850        return val;
 851}
 852
 853static inline int ata_id_rotation_rate(const u16 *id)
 854{
 855        u16 val = id[217];
 856
 857        if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
 858                return 0;
 859
 860        if (val > 1 && val < 0x401)
 861                return 0;
 862
 863        return val;
 864}
 865
 866static inline bool ata_id_has_trim(const u16 *id)
 867{
 868        if (ata_id_major_version(id) >= 7 &&
 869            (id[ATA_ID_DATA_SET_MGMT] & 1))
 870                return true;
 871        return false;
 872}
 873
 874static inline bool ata_id_has_zero_after_trim(const u16 *id)
 875{
 876        /* DSM supported, deterministic read, and read zero after trim set */
 877        if (ata_id_has_trim(id) &&
 878            (id[ATA_ID_ADDITIONAL_SUPP] & 0x4020) == 0x4020)
 879                return true;
 880
 881        return false;
 882}
 883
 884static inline bool ata_id_current_chs_valid(const u16 *id)
 885{
 886        /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
 887           has not been issued to the device then the values of
 888           id[ATA_ID_CUR_CYLS] to id[ATA_ID_CUR_SECTORS] are vendor specific. */
 889        return (id[ATA_ID_FIELD_VALID] & 1) && /* Current translation valid */
 890                id[ATA_ID_CUR_CYLS] &&  /* cylinders in current translation */
 891                id[ATA_ID_CUR_HEADS] &&  /* heads in current translation */
 892                id[ATA_ID_CUR_HEADS] <= 16 &&
 893                id[ATA_ID_CUR_SECTORS];    /* sectors in current translation */
 894}
 895
 896static inline bool ata_id_is_cfa(const u16 *id)
 897{
 898        if ((id[ATA_ID_CONFIG] == 0x848A) ||    /* Traditional CF */
 899            (id[ATA_ID_CONFIG] == 0x844A))      /* Delkin Devices CF */
 900                return true;
 901        /*
 902         * CF specs don't require specific value in the word 0 anymore and yet
 903         * they forbid to report the ATA version in the word 80 and require the
 904         * CFA feature set support to be indicated in the word 83 in this case.
 905         * Unfortunately, some cards only follow either of this requirements,
 906         * and while those that don't indicate CFA feature support need some
 907         * sort of quirk list, it seems impractical for the ones that do...
 908         */
 909        return (id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004;
 910}
 911
 912static inline bool ata_id_is_ssd(const u16 *id)
 913{
 914        return id[ATA_ID_ROT_SPEED] == 0x01;
 915}
 916
 917static inline bool ata_id_pio_need_iordy(const u16 *id, const u8 pio)
 918{
 919        /* CF spec. r4.1 Table 22 says no IORDY on PIO5 and PIO6. */
 920        if (pio > 4 && ata_id_is_cfa(id))
 921                return false;
 922        /* For PIO3 and higher it is mandatory. */
 923        if (pio > 2)
 924                return true;
 925        /* Turn it on when possible. */
 926        return ata_id_has_iordy(id);
 927}
 928
 929static inline bool ata_drive_40wire(const u16 *dev_id)
 930{
 931        if (ata_id_is_sata(dev_id))
 932                return false;   /* SATA */
 933        if ((dev_id[ATA_ID_HW_CONFIG] & 0xE000) == 0x6000)
 934                return false;   /* 80 wire */
 935        return true;
 936}
 937
 938static inline bool ata_drive_40wire_relaxed(const u16 *dev_id)
 939{
 940        if ((dev_id[ATA_ID_HW_CONFIG] & 0x2000) == 0x2000)
 941                return false;   /* 80 wire */
 942        return true;
 943}
 944
 945static inline int atapi_cdb_len(const u16 *dev_id)
 946{
 947        u16 tmp = dev_id[ATA_ID_CONFIG] & 0x3;
 948        switch (tmp) {
 949        case 0:         return 12;
 950        case 1:         return 16;
 951        default:        return -1;
 952        }
 953}
 954
 955static inline bool atapi_command_packet_set(const u16 *dev_id)
 956{
 957        return (dev_id[ATA_ID_CONFIG] >> 8) & 0x1f;
 958}
 959
 960static inline bool atapi_id_dmadir(const u16 *dev_id)
 961{
 962        return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
 963}
 964
 965/*
 966 * ata_id_is_lba_capacity_ok() performs a sanity check on
 967 * the claimed LBA capacity value for the device.
 968 *
 969 * Returns 1 if LBA capacity looks sensible, 0 otherwise.
 970 *
 971 * It is called only once for each device.
 972 */
 973static inline bool ata_id_is_lba_capacity_ok(u16 *id)
 974{
 975        unsigned long lba_sects, chs_sects, head, tail;
 976
 977        /* No non-LBA info .. so valid! */
 978        if (id[ATA_ID_CYLS] == 0)
 979                return true;
 980
 981        lba_sects = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
 982
 983        /*
 984         * The ATA spec tells large drives to return
 985         * C/H/S = 16383/16/63 independent of their size.
 986         * Some drives can be jumpered to use 15 heads instead of 16.
 987         * Some drives can be jumpered to use 4092 cyls instead of 16383.
 988         */
 989        if ((id[ATA_ID_CYLS] == 16383 ||
 990             (id[ATA_ID_CYLS] == 4092 && id[ATA_ID_CUR_CYLS] == 16383)) &&
 991            id[ATA_ID_SECTORS] == 63 &&
 992            (id[ATA_ID_HEADS] == 15 || id[ATA_ID_HEADS] == 16) &&
 993            (lba_sects >= 16383 * 63 * id[ATA_ID_HEADS]))
 994                return true;
 995
 996        chs_sects = id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * id[ATA_ID_SECTORS];
 997
 998        /* perform a rough sanity check on lba_sects: within 10% is OK */
 999        if (lba_sects - chs_sects < chs_sects/10)
1000                return true;
1001
1002        /* some drives have the word order reversed */
1003        head = (lba_sects >> 16) & 0xffff;
1004        tail = lba_sects & 0xffff;
1005        lba_sects = head | (tail << 16);
1006
1007        if (lba_sects - chs_sects < chs_sects/10) {
1008                *(__le32 *)&id[ATA_ID_LBA_CAPACITY] = __cpu_to_le32(lba_sects);
1009                return true;    /* LBA capacity is (now) good */
1010        }
1011
1012        return false;   /* LBA capacity value may be bad */
1013}
1014
1015static inline void ata_id_to_hd_driveid(u16 *id)
1016{
1017#ifdef __BIG_ENDIAN
1018        /* accessed in struct hd_driveid as 8-bit values */
1019        id[ATA_ID_MAX_MULTSECT]  = __cpu_to_le16(id[ATA_ID_MAX_MULTSECT]);
1020        id[ATA_ID_CAPABILITY]    = __cpu_to_le16(id[ATA_ID_CAPABILITY]);
1021        id[ATA_ID_OLD_PIO_MODES] = __cpu_to_le16(id[ATA_ID_OLD_PIO_MODES]);
1022        id[ATA_ID_OLD_DMA_MODES] = __cpu_to_le16(id[ATA_ID_OLD_DMA_MODES]);
1023        id[ATA_ID_MULTSECT]      = __cpu_to_le16(id[ATA_ID_MULTSECT]);
1024
1025        /* as 32-bit values */
1026        *(u32 *)&id[ATA_ID_LBA_CAPACITY] = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1027        *(u32 *)&id[ATA_ID_SPG]          = ata_id_u32(id, ATA_ID_SPG);
1028
1029        /* as 64-bit value */
1030        *(u64 *)&id[ATA_ID_LBA_CAPACITY_2] =
1031                ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1032#endif
1033}
1034
1035/*
1036 * Write LBA Range Entries to the buffer that will cover the extent from
1037 * sector to sector + count.  This is used for TRIM and for ADD LBA(S)
1038 * TO NV CACHE PINNED SET.
1039 */
1040static inline unsigned ata_set_lba_range_entries(void *_buffer,
1041                unsigned buf_size, u64 sector, unsigned long count)
1042{
1043        __le64 *buffer = _buffer;
1044        unsigned i = 0, used_bytes;
1045
1046        while (i < buf_size / 8 ) { /* 6-byte LBA + 2-byte range per entry */
1047                u64 entry = sector |
1048                        ((u64)(count > 0xffff ? 0xffff : count) << 48);
1049                buffer[i++] = __cpu_to_le64(entry);
1050                if (count <= 0xffff)
1051                        break;
1052                count -= 0xffff;
1053                sector += 0xffff;
1054        }
1055
1056        used_bytes = ALIGN(i * 8, 512);
1057        memset(buffer + i, 0, used_bytes - i * 8);
1058        return used_bytes;
1059}
1060
1061static inline int is_multi_taskfile(struct ata_taskfile *tf)
1062{
1063        return (tf->command == ATA_CMD_READ_MULTI) ||
1064               (tf->command == ATA_CMD_WRITE_MULTI) ||
1065               (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1066               (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1067               (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1068}
1069
1070static inline bool ata_ok(u8 status)
1071{
1072        return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
1073                        == ATA_DRDY);
1074}
1075
1076static inline bool lba_28_ok(u64 block, u32 n_block)
1077{
1078        /* check the ending block number: must be LESS THAN 0x0fffffff */
1079        return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256);
1080}
1081
1082static inline bool lba_48_ok(u64 block, u32 n_block)
1083{
1084        /* check the ending block number */
1085        return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
1086}
1087
1088#define sata_pmp_gscr_vendor(gscr)      ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
1089#define sata_pmp_gscr_devid(gscr)       ((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
1090#define sata_pmp_gscr_rev(gscr)         (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
1091#define sata_pmp_gscr_ports(gscr)       ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
1092
1093#endif /* __LINUX_ATA_H__ */
1094
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