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_OFFSET     = 0x30,
 301        ATA_LOG_DEVSLP_SIZE       = 0x08,
 302        ATA_LOG_DEVSLP_MDAT       = 0x00,
 303        ATA_LOG_DEVSLP_MDAT_MASK  = 0x1F,
 304        ATA_LOG_DEVSLP_DETO       = 0x01,
 305        ATA_LOG_DEVSLP_VALID      = 0x07,
 306        ATA_LOG_DEVSLP_VALID_MASK = 0x80,
 307
 308        /* READ/WRITE LONG (obsolete) */
 309        ATA_CMD_READ_LONG       = 0x22,
 310        ATA_CMD_READ_LONG_ONCE  = 0x23,
 311        ATA_CMD_WRITE_LONG      = 0x32,
 312        ATA_CMD_WRITE_LONG_ONCE = 0x33,
 313
 314        /* SETFEATURES stuff */
 315        SETFEATURES_XFER        = 0x03,
 316        XFER_UDMA_7             = 0x47,
 317        XFER_UDMA_6             = 0x46,
 318        XFER_UDMA_5             = 0x45,
 319        XFER_UDMA_4             = 0x44,
 320        XFER_UDMA_3             = 0x43,
 321        XFER_UDMA_2             = 0x42,
 322        XFER_UDMA_1             = 0x41,
 323        XFER_UDMA_0             = 0x40,
 324        XFER_MW_DMA_4           = 0x24, /* CFA only */
 325        XFER_MW_DMA_3           = 0x23, /* CFA only */
 326        XFER_MW_DMA_2           = 0x22,
 327        XFER_MW_DMA_1           = 0x21,
 328        XFER_MW_DMA_0           = 0x20,
 329        XFER_SW_DMA_2           = 0x12,
 330        XFER_SW_DMA_1           = 0x11,
 331        XFER_SW_DMA_0           = 0x10,
 332        XFER_PIO_6              = 0x0E, /* CFA only */
 333        XFER_PIO_5              = 0x0D, /* CFA only */
 334        XFER_PIO_4              = 0x0C,
 335        XFER_PIO_3              = 0x0B,
 336        XFER_PIO_2              = 0x0A,
 337        XFER_PIO_1              = 0x09,
 338        XFER_PIO_0              = 0x08,
 339        XFER_PIO_SLOW           = 0x00,
 340
 341        SETFEATURES_WC_ON       = 0x02, /* Enable write cache */
 342        SETFEATURES_WC_OFF      = 0x82, /* Disable write cache */
 343
 344        /* Enable/Disable Automatic Acoustic Management */
 345        SETFEATURES_AAM_ON      = 0x42,
 346        SETFEATURES_AAM_OFF     = 0xC2,
 347
 348        SETFEATURES_SPINUP      = 0x07, /* Spin-up drive */
 349
 350        SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
 351        SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
 352
 353        /* SETFEATURE Sector counts for SATA features */
 354        SATA_FPDMA_OFFSET       = 0x01, /* FPDMA non-zero buffer offsets */
 355        SATA_FPDMA_AA           = 0x02, /* FPDMA Setup FIS Auto-Activate */
 356        SATA_DIPM               = 0x03, /* Device Initiated Power Management */
 357        SATA_FPDMA_IN_ORDER     = 0x04, /* FPDMA in-order data delivery */
 358        SATA_AN                 = 0x05, /* Asynchronous Notification */
 359        SATA_SSP                = 0x06, /* Software Settings Preservation */
 360        SATA_DEVSLP             = 0x09, /* Device Sleep */
 361
 362        /* feature values for SET_MAX */
 363        ATA_SET_MAX_ADDR        = 0x00,
 364        ATA_SET_MAX_PASSWD      = 0x01,
 365        ATA_SET_MAX_LOCK        = 0x02,
 366        ATA_SET_MAX_UNLOCK      = 0x03,
 367        ATA_SET_MAX_FREEZE_LOCK = 0x04,
 368
 369        /* feature values for DEVICE CONFIGURATION OVERLAY */
 370        ATA_DCO_RESTORE         = 0xC0,
 371        ATA_DCO_FREEZE_LOCK     = 0xC1,
 372        ATA_DCO_IDENTIFY        = 0xC2,
 373        ATA_DCO_SET             = 0xC3,
 374
 375        /* feature values for SMART */
 376        ATA_SMART_ENABLE        = 0xD8,
 377        ATA_SMART_READ_VALUES   = 0xD0,
 378        ATA_SMART_READ_THRESHOLDS = 0xD1,
 379
 380        /* feature values for Data Set Management */
 381        ATA_DSM_TRIM            = 0x01,
 382
 383        /* password used in LBA Mid / LBA High for executing SMART commands */
 384        ATA_SMART_LBAM_PASS     = 0x4F,
 385        ATA_SMART_LBAH_PASS     = 0xC2,
 386
 387        /* ATAPI stuff */
 388        ATAPI_PKT_DMA           = (1 << 0),
 389        ATAPI_DMADIR            = (1 << 2),     /* ATAPI data dir:
 390                                                   0=to device, 1=to host */
 391        ATAPI_CDB_LEN           = 16,
 392
 393        /* PMP stuff */
 394        SATA_PMP_MAX_PORTS      = 15,
 395        SATA_PMP_CTRL_PORT      = 15,
 396
 397        SATA_PMP_GSCR_DWORDS    = 128,
 398        SATA_PMP_GSCR_PROD_ID   = 0,
 399        SATA_PMP_GSCR_REV       = 1,
 400        SATA_PMP_GSCR_PORT_INFO = 2,
 401        SATA_PMP_GSCR_ERROR     = 32,
 402        SATA_PMP_GSCR_ERROR_EN  = 33,
 403        SATA_PMP_GSCR_FEAT      = 64,
 404        SATA_PMP_GSCR_FEAT_EN   = 96,
 405
 406        SATA_PMP_PSCR_STATUS    = 0,
 407        SATA_PMP_PSCR_ERROR     = 1,
 408        SATA_PMP_PSCR_CONTROL   = 2,
 409
 410        SATA_PMP_FEAT_BIST      = (1 << 0),
 411        SATA_PMP_FEAT_PMREQ     = (1 << 1),
 412        SATA_PMP_FEAT_DYNSSC    = (1 << 2),
 413        SATA_PMP_FEAT_NOTIFY    = (1 << 3),
 414
 415        /* cable types */
 416        ATA_CBL_NONE            = 0,
 417        ATA_CBL_PATA40          = 1,
 418        ATA_CBL_PATA80          = 2,
 419        ATA_CBL_PATA40_SHORT    = 3,    /* 40 wire cable to high UDMA spec */
 420        ATA_CBL_PATA_UNK        = 4,    /* don't know, maybe 80c? */
 421        ATA_CBL_PATA_IGN        = 5,    /* don't know, ignore cable handling */
 422        ATA_CBL_SATA            = 6,
 423
 424        /* SATA Status and Control Registers */
 425        SCR_STATUS              = 0,
 426        SCR_ERROR               = 1,
 427        SCR_CONTROL             = 2,
 428        SCR_ACTIVE              = 3,
 429        SCR_NOTIFICATION        = 4,
 430
 431        /* SError bits */
 432        SERR_DATA_RECOVERED     = (1 << 0), /* recovered data error */
 433        SERR_COMM_RECOVERED     = (1 << 1), /* recovered comm failure */
 434        SERR_DATA               = (1 << 8), /* unrecovered data error */
 435        SERR_PERSISTENT         = (1 << 9), /* persistent data/comm error */
 436        SERR_PROTOCOL           = (1 << 10), /* protocol violation */
 437        SERR_INTERNAL           = (1 << 11), /* host internal error */
 438        SERR_PHYRDY_CHG         = (1 << 16), /* PHY RDY changed */
 439        SERR_PHY_INT_ERR        = (1 << 17), /* PHY internal error */
 440        SERR_COMM_WAKE          = (1 << 18), /* Comm wake */
 441        SERR_10B_8B_ERR         = (1 << 19), /* 10b to 8b decode error */
 442        SERR_DISPARITY          = (1 << 20), /* Disparity */
 443        SERR_CRC                = (1 << 21), /* CRC error */
 444        SERR_HANDSHAKE          = (1 << 22), /* Handshake error */
 445        SERR_LINK_SEQ_ERR       = (1 << 23), /* Link sequence error */
 446        SERR_TRANS_ST_ERROR     = (1 << 24), /* Transport state trans. error */
 447        SERR_UNRECOG_FIS        = (1 << 25), /* Unrecognized FIS */
 448        SERR_DEV_XCHG           = (1 << 26), /* device exchanged */
 449
 450        /* struct ata_taskfile flags */
 451        ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
 452        ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
 453        ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
 454        ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
 455        ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
 456        ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
 457        ATA_TFLAG_POLLING       = (1 << 6), /* set nIEN to 1 and use polling */
 458
 459        /* protocol flags */
 460        ATA_PROT_FLAG_PIO       = (1 << 0), /* is PIO */
 461        ATA_PROT_FLAG_DMA       = (1 << 1), /* is DMA */
 462        ATA_PROT_FLAG_DATA      = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
 463        ATA_PROT_FLAG_NCQ       = (1 << 2), /* is NCQ */
 464        ATA_PROT_FLAG_ATAPI     = (1 << 3), /* is ATAPI */
 465};
 466
 467enum ata_tf_protocols {
 468        /* ATA taskfile protocols */
 469        ATA_PROT_UNKNOWN,       /* unknown/invalid */
 470        ATA_PROT_NODATA,        /* no data */
 471        ATA_PROT_PIO,           /* PIO data xfer */
 472        ATA_PROT_DMA,           /* DMA */
 473        ATA_PROT_NCQ,           /* NCQ */
 474        ATAPI_PROT_NODATA,      /* packet command, no data */
 475        ATAPI_PROT_PIO,         /* packet command, PIO data xfer*/
 476        ATAPI_PROT_DMA,         /* packet command with special DMA sauce */
 477};
 478
 479enum ata_ioctls {
 480        ATA_IOC_GET_IO32        = 0x309,
 481        ATA_IOC_SET_IO32        = 0x324,
 482};
 483
 484/* core structures */
 485
 486struct ata_bmdma_prd {
 487        __le32                  addr;
 488        __le32                  flags_len;
 489};
 490
 491struct ata_taskfile {
 492        unsigned long           flags;          /* ATA_TFLAG_xxx */
 493        u8                      protocol;       /* ATA_PROT_xxx */
 494
 495        u8                      ctl;            /* control reg */
 496
 497        u8                      hob_feature;    /* additional data */
 498        u8                      hob_nsect;      /* to support LBA48 */
 499        u8                      hob_lbal;
 500        u8                      hob_lbam;
 501        u8                      hob_lbah;
 502
 503        u8                      feature;
 504        u8                      nsect;
 505        u8                      lbal;
 506        u8                      lbam;
 507        u8                      lbah;
 508
 509        u8                      device;
 510
 511        u8                      command;        /* IO operation */
 512};
 513
 514/*
 515 * protocol tests
 516 */
 517static inline unsigned int ata_prot_flags(u8 prot)
 518{
 519        switch (prot) {
 520        case ATA_PROT_NODATA:
 521                return 0;
 522        case ATA_PROT_PIO:
 523                return ATA_PROT_FLAG_PIO;
 524        case ATA_PROT_DMA:
 525                return ATA_PROT_FLAG_DMA;
 526        case ATA_PROT_NCQ:
 527                return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
 528        case ATAPI_PROT_NODATA:
 529                return ATA_PROT_FLAG_ATAPI;
 530        case ATAPI_PROT_PIO:
 531                return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
 532        case ATAPI_PROT_DMA:
 533                return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
 534        }
 535        return 0;
 536}
 537
 538static inline int ata_is_atapi(u8 prot)
 539{
 540        return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
 541}
 542
 543static inline int ata_is_nodata(u8 prot)
 544{
 545        return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
 546}
 547
 548static inline int ata_is_pio(u8 prot)
 549{
 550        return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
 551}
 552
 553static inline int ata_is_dma(u8 prot)
 554{
 555        return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
 556}
 557
 558static inline int ata_is_ncq(u8 prot)
 559{
 560        return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
 561}
 562
 563static inline int ata_is_data(u8 prot)
 564{
 565        return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
 566}
 567
 568/*
 569 * id tests
 570 */
 571#define ata_id_is_ata(id)       (((id)[ATA_ID_CONFIG] & (1 << 15)) == 0)
 572#define ata_id_has_lba(id)      ((id)[ATA_ID_CAPABILITY] & (1 << 9))
 573#define ata_id_has_dma(id)      ((id)[ATA_ID_CAPABILITY] & (1 << 8))
 574#define ata_id_has_ncq(id)      ((id)[ATA_ID_SATA_CAPABILITY] & (1 << 8))
 575#define ata_id_queue_depth(id)  (((id)[ATA_ID_QUEUE_DEPTH] & 0x1f) + 1)
 576#define ata_id_removeable(id)   ((id)[ATA_ID_CONFIG] & (1 << 7))
 577#define ata_id_has_atapi_AN(id) \
 578        ((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
 579          ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
 580         ((id)[ATA_ID_FEATURE_SUPP] & (1 << 5)))
 581#define ata_id_has_fpdma_aa(id) \
 582        ((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
 583          ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
 584         ((id)[ATA_ID_FEATURE_SUPP] & (1 << 2)))
 585#define ata_id_iordy_disable(id) ((id)[ATA_ID_CAPABILITY] & (1 << 10))
 586#define ata_id_has_iordy(id) ((id)[ATA_ID_CAPABILITY] & (1 << 11))
 587#define ata_id_u32(id,n)        \
 588        (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
 589#define ata_id_u64(id,n)        \
 590        ( ((u64) (id)[(n) + 3] << 48) | \
 591          ((u64) (id)[(n) + 2] << 32) | \
 592          ((u64) (id)[(n) + 1] << 16) | \
 593          ((u64) (id)[(n) + 0]) )
 594
 595#define ata_id_cdb_intr(id)     (((id)[ATA_ID_CONFIG] & 0x60) == 0x20)
 596#define ata_id_has_da(id)       ((id)[ATA_ID_SATA_CAPABILITY_2] & (1 << 4))
 597#define ata_id_has_devslp(id)   ((id)[ATA_ID_FEATURE_SUPP] & (1 << 8))
 598
 599static inline bool ata_id_has_hipm(const u16 *id)
 600{
 601        u16 val = id[ATA_ID_SATA_CAPABILITY];
 602
 603        if (val == 0 || val == 0xffff)
 604                return false;
 605
 606        return val & (1 << 9);
 607}
 608
 609static inline bool ata_id_has_dipm(const u16 *id)
 610{
 611        u16 val = id[ATA_ID_FEATURE_SUPP];
 612
 613        if (val == 0 || val == 0xffff)
 614                return false;
 615
 616        return val & (1 << 3);
 617}
 618
 619
 620static inline bool ata_id_has_fua(const u16 *id)
 621{
 622        if ((id[ATA_ID_CFSSE] & 0xC000) != 0x4000)
 623                return false;
 624        return id[ATA_ID_CFSSE] & (1 << 6);
 625}
 626
 627static inline bool ata_id_has_flush(const u16 *id)
 628{
 629        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 630                return false;
 631        return id[ATA_ID_COMMAND_SET_2] & (1 << 12);
 632}
 633
 634static inline bool ata_id_flush_enabled(const u16 *id)
 635{
 636        if (ata_id_has_flush(id) == 0)
 637                return false;
 638        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 639                return false;
 640        return id[ATA_ID_CFS_ENABLE_2] & (1 << 12);
 641}
 642
 643static inline bool ata_id_has_flush_ext(const u16 *id)
 644{
 645        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 646                return false;
 647        return id[ATA_ID_COMMAND_SET_2] & (1 << 13);
 648}
 649
 650static inline bool ata_id_flush_ext_enabled(const u16 *id)
 651{
 652        if (ata_id_has_flush_ext(id) == 0)
 653                return false;
 654        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 655                return false;
 656        /*
 657         * some Maxtor disks have bit 13 defined incorrectly
 658         * so check bit 10 too
 659         */
 660        return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
 661}
 662
 663static inline u32 ata_id_logical_sector_size(const u16 *id)
 664{
 665        /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
 666         * IDENTIFY DEVICE data, word 117-118.
 667         * 0xd000 ignores bit 13 (logical:physical > 1)
 668         */
 669        if ((id[ATA_ID_SECTOR_SIZE] & 0xd000) == 0x5000)
 670                return (((id[ATA_ID_LOGICAL_SECTOR_SIZE+1] << 16)
 671                         + id[ATA_ID_LOGICAL_SECTOR_SIZE]) * sizeof(u16)) ;
 672        return ATA_SECT_SIZE;
 673}
 674
 675static inline u8 ata_id_log2_per_physical_sector(const u16 *id)
 676{
 677        /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
 678         * IDENTIFY DEVICE data, word 106.
 679         * 0xe000 ignores bit 12 (logical sector > 512 bytes)
 680         */
 681        if ((id[ATA_ID_SECTOR_SIZE] & 0xe000) == 0x6000)
 682                return (id[ATA_ID_SECTOR_SIZE] & 0xf);
 683        return 0;
 684}
 685
 686/* Offset of logical sectors relative to physical sectors.
 687 *
 688 * If device has more than one logical sector per physical sector
 689 * (aka 512 byte emulation), vendors might offset the "sector 0" address
 690 * so sector 63 is "naturally aligned" - e.g. FAT partition table.
 691 * This avoids Read/Mod/Write penalties when using FAT partition table
 692 * and updating "well aligned" (FS perspective) physical sectors on every
 693 * transaction.
 694 */
 695static inline u16 ata_id_logical_sector_offset(const u16 *id,
 696         u8 log2_per_phys)
 697{
 698        u16 word_209 = id[209];
 699
 700        if ((log2_per_phys > 1) && (word_209 & 0xc000) == 0x4000) {
 701                u16 first = word_209 & 0x3fff;
 702                if (first > 0)
 703                        return (1 << log2_per_phys) - first;
 704        }
 705        return 0;
 706}
 707
 708static inline bool ata_id_has_lba48(const u16 *id)
 709{
 710        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 711                return false;
 712        if (!ata_id_u64(id, ATA_ID_LBA_CAPACITY_2))
 713                return false;
 714        return id[ATA_ID_COMMAND_SET_2] & (1 << 10);
 715}
 716
 717static inline bool ata_id_lba48_enabled(const u16 *id)
 718{
 719        if (ata_id_has_lba48(id) == 0)
 720                return false;
 721        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 722                return false;
 723        return id[ATA_ID_CFS_ENABLE_2] & (1 << 10);
 724}
 725
 726static inline bool ata_id_hpa_enabled(const u16 *id)
 727{
 728        /* Yes children, word 83 valid bits cover word 82 data */
 729        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 730                return false;
 731        /* And 87 covers 85-87 */
 732        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 733                return false;
 734        /* Check command sets enabled as well as supported */
 735        if ((id[ATA_ID_CFS_ENABLE_1] & (1 << 10)) == 0)
 736                return false;
 737        return id[ATA_ID_COMMAND_SET_1] & (1 << 10);
 738}
 739
 740static inline bool ata_id_has_wcache(const u16 *id)
 741{
 742        /* Yes children, word 83 valid bits cover word 82 data */
 743        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 744                return false;
 745        return id[ATA_ID_COMMAND_SET_1] & (1 << 5);
 746}
 747
 748static inline bool ata_id_has_pm(const u16 *id)
 749{
 750        if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)
 751                return false;
 752        return id[ATA_ID_COMMAND_SET_1] & (1 << 3);
 753}
 754
 755static inline bool ata_id_rahead_enabled(const u16 *id)
 756{
 757        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 758                return false;
 759        return id[ATA_ID_CFS_ENABLE_1] & (1 << 6);
 760}
 761
 762static inline bool ata_id_wcache_enabled(const u16 *id)
 763{
 764        if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
 765                return false;
 766        return id[ATA_ID_CFS_ENABLE_1] & (1 << 5);
 767}
 768
 769/**
 770 *      ata_id_major_version    -       get ATA level of drive
 771 *      @id: Identify data
 772 *
 773 *      Caveats:
 774 *              ATA-1 considers identify optional
 775 *              ATA-2 introduces mandatory identify
 776 *              ATA-3 introduces word 80 and accurate reporting
 777 *
 778 *      The practical impact of this is that ata_id_major_version cannot
 779 *      reliably report on drives below ATA3.
 780 */
 781
 782static inline unsigned int ata_id_major_version(const u16 *id)
 783{
 784        unsigned int mver;
 785
 786        if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
 787                return 0;
 788
 789        for (mver = 14; mver >= 1; mver--)
 790                if (id[ATA_ID_MAJOR_VER] & (1 << mver))
 791                        break;
 792        return mver;
 793}
 794
 795static inline bool ata_id_is_sata(const u16 *id)
 796{
 797        /*
 798         * See if word 93 is 0 AND drive is at least ATA-5 compatible
 799         * verifying that word 80 by casting it to a signed type --
 800         * this trick allows us to filter out the reserved values of
 801         * 0x0000 and 0xffff along with the earlier ATA revisions...
 802         */
 803        if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020)
 804                return true;
 805        return false;
 806}
 807
 808static inline bool ata_id_has_tpm(const u16 *id)
 809{
 810        /* The TPM bits are only valid on ATA8 */
 811        if (ata_id_major_version(id) < 8)
 812                return false;
 813        if ((id[48] & 0xC000) != 0x4000)
 814                return false;
 815        return id[48] & (1 << 0);
 816}
 817
 818static inline bool ata_id_has_dword_io(const u16 *id)
 819{
 820        /* ATA 8 reuses this flag for "trusted" computing */
 821        if (ata_id_major_version(id) > 7)
 822                return false;
 823        return id[ATA_ID_DWORD_IO] & (1 << 0);
 824}
 825
 826static inline bool ata_id_has_unload(const u16 *id)
 827{
 828        if (ata_id_major_version(id) >= 7 &&
 829            (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 &&
 830            id[ATA_ID_CFSSE] & (1 << 13))
 831                return true;
 832        return false;
 833}
 834
 835static inline bool ata_id_has_wwn(const u16 *id)
 836{
 837        return (id[ATA_ID_CSF_DEFAULT] & 0xC100) == 0x4100;
 838}
 839
 840static inline int ata_id_form_factor(const u16 *id)
 841{
 842        u16 val = id[168];
 843
 844        if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
 845                return 0;
 846
 847        val &= 0xf;
 848
 849        if (val > 5)
 850                return 0;
 851
 852        return val;
 853}
 854
 855static inline int ata_id_rotation_rate(const u16 *id)
 856{
 857        u16 val = id[217];
 858
 859        if (ata_id_major_version(id) < 7 || val == 0 || val == 0xffff)
 860                return 0;
 861
 862        if (val > 1 && val < 0x401)
 863                return 0;
 864
 865        return val;
 866}
 867
 868static inline bool ata_id_has_trim(const u16 *id)
 869{
 870        if (ata_id_major_version(id) >= 7 &&
 871            (id[ATA_ID_DATA_SET_MGMT] & 1))
 872                return true;
 873        return false;
 874}
 875
 876static inline bool ata_id_has_zero_after_trim(const u16 *id)
 877{
 878        /* DSM supported, deterministic read, and read zero after trim set */
 879        if (ata_id_has_trim(id) &&
 880            (id[ATA_ID_ADDITIONAL_SUPP] & 0x4020) == 0x4020)
 881                return true;
 882
 883        return false;
 884}
 885
 886static inline bool ata_id_current_chs_valid(const u16 *id)
 887{
 888        /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
 889           has not been issued to the device then the values of
 890           id[ATA_ID_CUR_CYLS] to id[ATA_ID_CUR_SECTORS] are vendor specific. */
 891        return (id[ATA_ID_FIELD_VALID] & 1) && /* Current translation valid */
 892                id[ATA_ID_CUR_CYLS] &&  /* cylinders in current translation */
 893                id[ATA_ID_CUR_HEADS] &&  /* heads in current translation */
 894                id[ATA_ID_CUR_HEADS] <= 16 &&
 895                id[ATA_ID_CUR_SECTORS];    /* sectors in current translation */
 896}
 897
 898static inline bool ata_id_is_cfa(const u16 *id)
 899{
 900        if ((id[ATA_ID_CONFIG] == 0x848A) ||    /* Traditional CF */
 901            (id[ATA_ID_CONFIG] == 0x844A))      /* Delkin Devices CF */
 902                return true;
 903        /*
 904         * CF specs don't require specific value in the word 0 anymore and yet
 905         * they forbid to report the ATA version in the word 80 and require the
 906         * CFA feature set support to be indicated in the word 83 in this case.
 907         * Unfortunately, some cards only follow either of this requirements,
 908         * and while those that don't indicate CFA feature support need some
 909         * sort of quirk list, it seems impractical for the ones that do...
 910         */
 911        return (id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004;
 912}
 913
 914static inline bool ata_id_is_ssd(const u16 *id)
 915{
 916        return id[ATA_ID_ROT_SPEED] == 0x01;
 917}
 918
 919static inline bool ata_id_pio_need_iordy(const u16 *id, const u8 pio)
 920{
 921        /* CF spec. r4.1 Table 22 says no IORDY on PIO5 and PIO6. */
 922        if (pio > 4 && ata_id_is_cfa(id))
 923                return false;
 924        /* For PIO3 and higher it is mandatory. */
 925        if (pio > 2)
 926                return true;
 927        /* Turn it on when possible. */
 928        return ata_id_has_iordy(id);
 929}
 930
 931static inline bool ata_drive_40wire(const u16 *dev_id)
 932{
 933        if (ata_id_is_sata(dev_id))
 934                return false;   /* SATA */
 935        if ((dev_id[ATA_ID_HW_CONFIG] & 0xE000) == 0x6000)
 936                return false;   /* 80 wire */
 937        return true;
 938}
 939
 940static inline bool ata_drive_40wire_relaxed(const u16 *dev_id)
 941{
 942        if ((dev_id[ATA_ID_HW_CONFIG] & 0x2000) == 0x2000)
 943                return false;   /* 80 wire */
 944        return true;
 945}
 946
 947static inline int atapi_cdb_len(const u16 *dev_id)
 948{
 949        u16 tmp = dev_id[ATA_ID_CONFIG] & 0x3;
 950        switch (tmp) {
 951        case 0:         return 12;
 952        case 1:         return 16;
 953        default:        return -1;
 954        }
 955}
 956
 957static inline int atapi_command_packet_set(const u16 *dev_id)
 958{
 959        return (dev_id[ATA_ID_CONFIG] >> 8) & 0x1f;
 960}
 961
 962static inline bool atapi_id_dmadir(const u16 *dev_id)
 963{
 964        return ata_id_major_version(dev_id) >= 7 && (dev_id[62] & 0x8000);
 965}
 966
 967/*
 968 * ata_id_is_lba_capacity_ok() performs a sanity check on
 969 * the claimed LBA capacity value for the device.
 970 *
 971 * Returns 1 if LBA capacity looks sensible, 0 otherwise.
 972 *
 973 * It is called only once for each device.
 974 */
 975static inline bool ata_id_is_lba_capacity_ok(u16 *id)
 976{
 977        unsigned long lba_sects, chs_sects, head, tail;
 978
 979        /* No non-LBA info .. so valid! */
 980        if (id[ATA_ID_CYLS] == 0)
 981                return true;
 982
 983        lba_sects = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
 984
 985        /*
 986         * The ATA spec tells large drives to return
 987         * C/H/S = 16383/16/63 independent of their size.
 988         * Some drives can be jumpered to use 15 heads instead of 16.
 989         * Some drives can be jumpered to use 4092 cyls instead of 16383.
 990         */
 991        if ((id[ATA_ID_CYLS] == 16383 ||
 992             (id[ATA_ID_CYLS] == 4092 && id[ATA_ID_CUR_CYLS] == 16383)) &&
 993            id[ATA_ID_SECTORS] == 63 &&
 994            (id[ATA_ID_HEADS] == 15 || id[ATA_ID_HEADS] == 16) &&
 995            (lba_sects >= 16383 * 63 * id[ATA_ID_HEADS]))
 996                return true;
 997
 998        chs_sects = id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * id[ATA_ID_SECTORS];
 999
1000        /* perform a rough sanity check on lba_sects: within 10% is OK */
1001        if (lba_sects - chs_sects < chs_sects/10)
1002                return true;
1003
1004        /* some drives have the word order reversed */
1005        head = (lba_sects >> 16) & 0xffff;
1006        tail = lba_sects & 0xffff;
1007        lba_sects = head | (tail << 16);
1008
1009        if (lba_sects - chs_sects < chs_sects/10) {
1010                *(__le32 *)&id[ATA_ID_LBA_CAPACITY] = __cpu_to_le32(lba_sects);
1011                return true;    /* LBA capacity is (now) good */
1012        }
1013
1014        return false;   /* LBA capacity value may be bad */
1015}
1016
1017static inline void ata_id_to_hd_driveid(u16 *id)
1018{
1019#ifdef __BIG_ENDIAN
1020        /* accessed in struct hd_driveid as 8-bit values */
1021        id[ATA_ID_MAX_MULTSECT]  = __cpu_to_le16(id[ATA_ID_MAX_MULTSECT]);
1022        id[ATA_ID_CAPABILITY]    = __cpu_to_le16(id[ATA_ID_CAPABILITY]);
1023        id[ATA_ID_OLD_PIO_MODES] = __cpu_to_le16(id[ATA_ID_OLD_PIO_MODES]);
1024        id[ATA_ID_OLD_DMA_MODES] = __cpu_to_le16(id[ATA_ID_OLD_DMA_MODES]);
1025        id[ATA_ID_MULTSECT]      = __cpu_to_le16(id[ATA_ID_MULTSECT]);
1026
1027        /* as 32-bit values */
1028        *(u32 *)&id[ATA_ID_LBA_CAPACITY] = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1029        *(u32 *)&id[ATA_ID_SPG]          = ata_id_u32(id, ATA_ID_SPG);
1030
1031        /* as 64-bit value */
1032        *(u64 *)&id[ATA_ID_LBA_CAPACITY_2] =
1033                ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1034#endif
1035}
1036
1037/*
1038 * Write LBA Range Entries to the buffer that will cover the extent from
1039 * sector to sector + count.  This is used for TRIM and for ADD LBA(S)
1040 * TO NV CACHE PINNED SET.
1041 */
1042static inline unsigned ata_set_lba_range_entries(void *_buffer,
1043                unsigned buf_size, u64 sector, unsigned long count)
1044{
1045        __le64 *buffer = _buffer;
1046        unsigned i = 0, used_bytes;
1047
1048        while (i < buf_size / 8 ) { /* 6-byte LBA + 2-byte range per entry */
1049                u64 entry = sector |
1050                        ((u64)(count > 0xffff ? 0xffff : count) << 48);
1051                buffer[i++] = __cpu_to_le64(entry);
1052                if (count <= 0xffff)
1053                        break;
1054                count -= 0xffff;
1055                sector += 0xffff;
1056        }
1057
1058        used_bytes = ALIGN(i * 8, 512);
1059        memset(buffer + i, 0, used_bytes - i * 8);
1060        return used_bytes;
1061}
1062
1063static inline int is_multi_taskfile(struct ata_taskfile *tf)
1064{
1065        return (tf->command == ATA_CMD_READ_MULTI) ||
1066               (tf->command == ATA_CMD_WRITE_MULTI) ||
1067               (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1068               (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1069               (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1070}
1071
1072static inline bool ata_ok(u8 status)
1073{
1074        return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
1075                        == ATA_DRDY);
1076}
1077
1078static inline bool lba_28_ok(u64 block, u32 n_block)
1079{
1080        /* check the ending block number: must be LESS THAN 0x0fffffff */
1081        return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256);
1082}
1083
1084static inline bool lba_48_ok(u64 block, u32 n_block)
1085{
1086        /* check the ending block number */
1087        return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
1088}
1089
1090#define sata_pmp_gscr_vendor(gscr)      ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
1091#define sata_pmp_gscr_devid(gscr)       ((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
1092#define sata_pmp_gscr_rev(gscr)         (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
1093#define sata_pmp_gscr_ports(gscr)       ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
1094
1095#endif /* __LINUX_ATA_H__ */
1096
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