include/linux/ata.h

   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/types.h>
  33
  34 /* defines only for the constants which don't work well as enums */
  35 #define ATA_DMA_BOUNDARY        0xffffUL
  36 #define ATA_DMA_MASK            0xffffffffULL
  37
  38 enum {
  39         /* various global constants */
  40         ATA_MAX_DEVICES         = 2,    /* per bus/port */
  41         ATA_MAX_PRD             = 256,  /* we could make these 256/256 */
  42         ATA_SECT_SIZE           = 512,
  43         ATA_MAX_SECTORS_128     = 128,
  44         ATA_MAX_SECTORS         = 256,
  45         ATA_MAX_SECTORS_LBA48   = 65535,/* TODO: 65536? */
  46         ATA_MAX_SECTORS_TAPE    = 65535,
  47
  48         ATA_ID_WORDS            = 256,
  49         ATA_ID_SERNO            = 10,
  50         ATA_ID_FW_REV           = 23,
  51         ATA_ID_PROD             = 27,
  52         ATA_ID_OLD_PIO_MODES    = 51,
  53         ATA_ID_FIELD_VALID      = 53,
  54         ATA_ID_MWDMA_MODES      = 63,
  55         ATA_ID_PIO_MODES        = 64,
  56         ATA_ID_EIDE_DMA_MIN     = 65,
  57         ATA_ID_EIDE_PIO         = 67,
  58         ATA_ID_EIDE_PIO_IORDY   = 68,
  59         ATA_ID_UDMA_MODES       = 88,
  60         ATA_ID_MAJOR_VER        = 80,
  61         ATA_ID_PIO4             = (1 << 1),
  62
  63         ATA_ID_SERNO_LEN        = 20,
  64         ATA_ID_FW_REV_LEN       = 8,
  65         ATA_ID_PROD_LEN         = 40,
  66
  67         ATA_PCI_CTL_OFS         = 2,
  68
  69         ATA_PIO0                = (1 << 0),
  70         ATA_PIO1                = ATA_PIO0 | (1 << 1),
  71         ATA_PIO2                = ATA_PIO1 | (1 << 2),
  72         ATA_PIO3                = ATA_PIO2 | (1 << 3),
  73         ATA_PIO4                = ATA_PIO3 | (1 << 4),
  74         ATA_PIO5                = ATA_PIO4 | (1 << 5),
  75         ATA_PIO6                = ATA_PIO5 | (1 << 6),
  76
  77         ATA_SWDMA0              = (1 << 0),
  78         ATA_SWDMA1              = ATA_SWDMA0 | (1 << 1),
  79         ATA_SWDMA2              = ATA_SWDMA1 | (1 << 2),
  80
  81         ATA_SWDMA2_ONLY         = (1 << 2),
  82
  83         ATA_MWDMA0              = (1 << 0),
  84         ATA_MWDMA1              = ATA_MWDMA0 | (1 << 1),
  85         ATA_MWDMA2              = ATA_MWDMA1 | (1 << 2),
  86
  87         ATA_MWDMA12_ONLY        = (1 << 1) | (1 << 2),
  88         ATA_MWDMA2_ONLY         = (1 << 2),
  89
  90         ATA_UDMA0               = (1 << 0),
  91         ATA_UDMA1               = ATA_UDMA0 | (1 << 1),
  92         ATA_UDMA2               = ATA_UDMA1 | (1 << 2),
  93         ATA_UDMA3               = ATA_UDMA2 | (1 << 3),
  94         ATA_UDMA4               = ATA_UDMA3 | (1 << 4),
  95         ATA_UDMA5               = ATA_UDMA4 | (1 << 5),
  96         ATA_UDMA6               = ATA_UDMA5 | (1 << 6),
  97         ATA_UDMA7               = ATA_UDMA6 | (1 << 7),
  98         /* ATA_UDMA7 is just for completeness... doesn't exist (yet?).  */
  99
 100         ATA_UDMA_MASK_40C       = ATA_UDMA2,    /* udma0-2 */
 101
 102         /* DMA-related */
 103         ATA_PRD_SZ              = 8,
 104         ATA_PRD_TBL_SZ          = (ATA_MAX_PRD * ATA_PRD_SZ),
 105         ATA_PRD_EOT             = (1 << 31),    /* end-of-table flag */
 106
 107         ATA_DMA_TABLE_OFS       = 4,
 108         ATA_DMA_STATUS          = 2,
 109         ATA_DMA_CMD             = 0,
 110         ATA_DMA_WR              = (1 << 3),
 111         ATA_DMA_START           = (1 << 0),
 112         ATA_DMA_INTR            = (1 << 2),
 113         ATA_DMA_ERR             = (1 << 1),
 114         ATA_DMA_ACTIVE          = (1 << 0),
 115
 116         /* bits in ATA command block registers */
 117         ATA_HOB                 = (1 << 7),     /* LBA48 selector */
 118         ATA_NIEN                = (1 << 1),     /* disable-irq flag */
 119         ATA_LBA                 = (1 << 6),     /* LBA28 selector */
 120         ATA_DEV1                = (1 << 4),     /* Select Device 1 (slave) */
 121         ATA_DEVICE_OBS          = (1 << 7) | (1 << 5), /* obs bits in dev reg */
 122         ATA_DEVCTL_OBS          = (1 << 3),     /* obsolete bit in devctl reg */
 123         ATA_BUSY                = (1 << 7),     /* BSY status bit */
 124         ATA_DRDY                = (1 << 6),     /* device ready */
 125         ATA_DF                  = (1 << 5),     /* device fault */
 126         ATA_DRQ                 = (1 << 3),     /* data request i/o */
 127         ATA_ERR                 = (1 << 0),     /* have an error */
 128         ATA_SRST                = (1 << 2),     /* software reset */
 129         ATA_ICRC                = (1 << 7),     /* interface CRC error */
 130         ATA_UNC                 = (1 << 6),     /* uncorrectable media error */
 131         ATA_IDNF                = (1 << 4),     /* ID not found */
 132         ATA_ABORTED             = (1 << 2),     /* command aborted */
 133
 134         /* ATA command block registers */
 135         ATA_REG_DATA            = 0x00,
 136         ATA_REG_ERR             = 0x01,
 137         ATA_REG_NSECT           = 0x02,
 138         ATA_REG_LBAL            = 0x03,
 139         ATA_REG_LBAM            = 0x04,
 140         ATA_REG_LBAH            = 0x05,
 141         ATA_REG_DEVICE          = 0x06,
 142         ATA_REG_STATUS          = 0x07,
 143
 144         ATA_REG_FEATURE         = ATA_REG_ERR, /* and their aliases */
 145         ATA_REG_CMD             = ATA_REG_STATUS,
 146         ATA_REG_BYTEL           = ATA_REG_LBAM,
 147         ATA_REG_BYTEH           = ATA_REG_LBAH,
 148         ATA_REG_DEVSEL          = ATA_REG_DEVICE,
 149         ATA_REG_IRQ             = ATA_REG_NSECT,
 150
 151         /* ATA device commands */
 152         ATA_CMD_DEV_RESET       = 0x08, /* ATAPI device reset */
 153         ATA_CMD_CHK_POWER       = 0xE5, /* check power mode */
 154         ATA_CMD_STANDBY         = 0xE2, /* place in standby power mode */
 155         ATA_CMD_IDLE            = 0xE3, /* place in idle power mode */
 156         ATA_CMD_EDD             = 0x90, /* execute device diagnostic */
 157         ATA_CMD_FLUSH           = 0xE7,
 158         ATA_CMD_FLUSH_EXT       = 0xEA,
 159         ATA_CMD_ID_ATA          = 0xEC,
 160         ATA_CMD_ID_ATAPI        = 0xA1,
 161         ATA_CMD_READ            = 0xC8,
 162         ATA_CMD_READ_EXT        = 0x25,
 163         ATA_CMD_WRITE           = 0xCA,
 164         ATA_CMD_WRITE_EXT       = 0x35,
 165         ATA_CMD_WRITE_FUA_EXT   = 0x3D,
 166         ATA_CMD_FPDMA_READ      = 0x60,
 167         ATA_CMD_FPDMA_WRITE     = 0x61,
 168         ATA_CMD_PIO_READ        = 0x20,
 169         ATA_CMD_PIO_READ_EXT    = 0x24,
 170         ATA_CMD_PIO_WRITE       = 0x30,
 171         ATA_CMD_PIO_WRITE_EXT   = 0x34,
 172         ATA_CMD_READ_MULTI      = 0xC4,
 173         ATA_CMD_READ_MULTI_EXT  = 0x29,
 174         ATA_CMD_WRITE_MULTI     = 0xC5,
 175         ATA_CMD_WRITE_MULTI_EXT = 0x39,
 176         ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
 177         ATA_CMD_SET_FEATURES    = 0xEF,
 178         ATA_CMD_SET_MULTI       = 0xC6,
 179         ATA_CMD_PACKET          = 0xA0,
 180         ATA_CMD_VERIFY          = 0x40,
 181         ATA_CMD_VERIFY_EXT      = 0x42,
 182         ATA_CMD_STANDBYNOW1     = 0xE0,
 183         ATA_CMD_IDLEIMMEDIATE   = 0xE1,
 184         ATA_CMD_SLEEP           = 0xE6,
 185         ATA_CMD_INIT_DEV_PARAMS = 0x91,
 186         ATA_CMD_READ_NATIVE_MAX = 0xF8,
 187         ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
 188         ATA_CMD_SET_MAX         = 0xF9,
 189         ATA_CMD_SET_MAX_EXT     = 0x37,
 190         ATA_CMD_READ_LOG_EXT    = 0x2f,
 191         ATA_CMD_PMP_READ        = 0xE4,
 192         ATA_CMD_PMP_WRITE       = 0xE8,
 193         ATA_CMD_CONF_OVERLAY    = 0xB1,
 194         ATA_CMD_SEC_FREEZE_LOCK = 0xF5,
 195
 196         /* READ_LOG_EXT pages */
 197         ATA_LOG_SATA_NCQ        = 0x10,
 198
 199         /* READ/WRITE LONG (obsolete) */
 200         ATA_CMD_READ_LONG       = 0x22,
 201         ATA_CMD_READ_LONG_ONCE  = 0x23,
 202         ATA_CMD_WRITE_LONG      = 0x32,
 203         ATA_CMD_WRITE_LONG_ONCE = 0x33,
 204
 205         /* SETFEATURES stuff */
 206         SETFEATURES_XFER        = 0x03,
 207         XFER_UDMA_7             = 0x47,
 208         XFER_UDMA_6             = 0x46,
 209         XFER_UDMA_5             = 0x45,
 210         XFER_UDMA_4             = 0x44,
 211         XFER_UDMA_3             = 0x43,
 212         XFER_UDMA_2             = 0x42,
 213         XFER_UDMA_1             = 0x41,
 214         XFER_UDMA_0             = 0x40,
 215         XFER_MW_DMA_4           = 0x24, /* CFA only */
 216         XFER_MW_DMA_3           = 0x23, /* CFA only */
 217         XFER_MW_DMA_2           = 0x22,
 218         XFER_MW_DMA_1           = 0x21,
 219         XFER_MW_DMA_0           = 0x20,
 220         XFER_SW_DMA_2           = 0x12,
 221         XFER_SW_DMA_1           = 0x11,
 222         XFER_SW_DMA_0           = 0x10,
 223         XFER_PIO_6              = 0x0E, /* CFA only */
 224         XFER_PIO_5              = 0x0D, /* CFA only */
 225         XFER_PIO_4              = 0x0C,
 226         XFER_PIO_3              = 0x0B,
 227         XFER_PIO_2              = 0x0A,
 228         XFER_PIO_1              = 0x09,
 229         XFER_PIO_0              = 0x08,
 230         XFER_PIO_SLOW           = 0x00,
 231
 232         SETFEATURES_WC_ON       = 0x02, /* Enable write cache */
 233         SETFEATURES_WC_OFF      = 0x82, /* Disable write cache */
 234
 235         SETFEATURES_SPINUP      = 0x07, /* Spin-up drive */
 236
 237         SETFEATURES_SATA_ENABLE = 0x10, /* Enable use of SATA feature */
 238         SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
 239
 240         /* SETFEATURE Sector counts for SATA features */
 241         SATA_AN                 = 0x05,  /* Asynchronous Notification */
 242         SATA_DIPM               = 0x03,  /* Device Initiated Power Management */
 243
 244         /* feature values for SET_MAX */
 245         ATA_SET_MAX_ADDR        = 0x00,
 246         ATA_SET_MAX_PASSWD      = 0x01,
 247         ATA_SET_MAX_LOCK        = 0x02,
 248         ATA_SET_MAX_UNLOCK      = 0x03,
 249         ATA_SET_MAX_FREEZE_LOCK = 0x04,
 250
 251         /* feature values for DEVICE CONFIGURATION OVERLAY */
 252         ATA_DCO_RESTORE         = 0xC0,
 253         ATA_DCO_FREEZE_LOCK     = 0xC1,
 254         ATA_DCO_IDENTIFY        = 0xC2,
 255         ATA_DCO_SET             = 0xC3,
 256
 257         /* ATAPI stuff */
 258         ATAPI_PKT_DMA           = (1 << 0),
 259         ATAPI_DMADIR            = (1 << 2),     /* ATAPI data dir:
 260                                                    0=to device, 1=to host */
 261         ATAPI_CDB_LEN           = 16,
 262
 263         /* PMP stuff */
 264         SATA_PMP_MAX_PORTS      = 15,
 265         SATA_PMP_CTRL_PORT      = 15,
 266
 267         SATA_PMP_GSCR_DWORDS    = 128,
 268         SATA_PMP_GSCR_PROD_ID   = 0,
 269         SATA_PMP_GSCR_REV       = 1,
 270         SATA_PMP_GSCR_PORT_INFO = 2,
 271         SATA_PMP_GSCR_ERROR     = 32,
 272         SATA_PMP_GSCR_ERROR_EN  = 33,
 273         SATA_PMP_GSCR_FEAT      = 64,
 274         SATA_PMP_GSCR_FEAT_EN   = 96,
 275
 276         SATA_PMP_PSCR_STATUS    = 0,
 277         SATA_PMP_PSCR_ERROR     = 1,
 278         SATA_PMP_PSCR_CONTROL   = 2,
 279
 280         SATA_PMP_FEAT_BIST      = (1 << 0),
 281         SATA_PMP_FEAT_PMREQ     = (1 << 1),
 282         SATA_PMP_FEAT_DYNSSC    = (1 << 2),
 283         SATA_PMP_FEAT_NOTIFY    = (1 << 3),
 284
 285         /* cable types */
 286         ATA_CBL_NONE            = 0,
 287         ATA_CBL_PATA40          = 1,
 288         ATA_CBL_PATA80          = 2,
 289         ATA_CBL_PATA40_SHORT    = 3,    /* 40 wire cable to high UDMA spec */
 290         ATA_CBL_PATA_UNK        = 4,    /* don't know, maybe 80c? */
 291         ATA_CBL_PATA_IGN        = 5,    /* don't know, ignore cable handling */
 292         ATA_CBL_SATA            = 6,
 293
 294         /* SATA Status and Control Registers */
 295         SCR_STATUS              = 0,
 296         SCR_ERROR               = 1,
 297         SCR_CONTROL             = 2,
 298         SCR_ACTIVE              = 3,
 299         SCR_NOTIFICATION        = 4,
 300
 301         /* SError bits */
 302         SERR_DATA_RECOVERED     = (1 << 0), /* recovered data error */
 303         SERR_COMM_RECOVERED     = (1 << 1), /* recovered comm failure */
 304         SERR_DATA               = (1 << 8), /* unrecovered data error */
 305         SERR_PERSISTENT         = (1 << 9), /* persistent data/comm error */
 306         SERR_PROTOCOL           = (1 << 10), /* protocol violation */
 307         SERR_INTERNAL           = (1 << 11), /* host internal error */
 308         SERR_PHYRDY_CHG         = (1 << 16), /* PHY RDY changed */
 309         SERR_PHY_INT_ERR        = (1 << 17), /* PHY internal error */
 310         SERR_COMM_WAKE          = (1 << 18), /* Comm wake */
 311         SERR_10B_8B_ERR         = (1 << 19), /* 10b to 8b decode error */
 312         SERR_DISPARITY          = (1 << 20), /* Disparity */
 313         SERR_CRC                = (1 << 21), /* CRC error */
 314         SERR_HANDSHAKE          = (1 << 22), /* Handshake error */
 315         SERR_LINK_SEQ_ERR       = (1 << 23), /* Link sequence error */
 316         SERR_TRANS_ST_ERROR     = (1 << 24), /* Transport state trans. error */
 317         SERR_UNRECOG_FIS        = (1 << 25), /* Unrecognized FIS */
 318         SERR_DEV_XCHG           = (1 << 26), /* device exchanged */
 319
 320         /* struct ata_taskfile flags */
 321         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
 322         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
 323         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
 324         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
 325         ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
 326         ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
 327         ATA_TFLAG_POLLING       = (1 << 6), /* set nIEN to 1 and use polling */
 328
 329         /* protocol flags */
 330         ATA_PROT_FLAG_PIO       = (1 << 0), /* is PIO */
 331         ATA_PROT_FLAG_DMA       = (1 << 1), /* is DMA */
 332         ATA_PROT_FLAG_DATA      = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
 333         ATA_PROT_FLAG_NCQ       = (1 << 2), /* is NCQ */
 334         ATA_PROT_FLAG_ATAPI     = (1 << 3), /* is ATAPI */
 335 };
 336
 337 enum ata_tf_protocols {
 338         /* ATA taskfile protocols */
 339         ATA_PROT_UNKNOWN,       /* unknown/invalid */
 340         ATA_PROT_NODATA,        /* no data */
 341         ATA_PROT_PIO,           /* PIO data xfer */
 342         ATA_PROT_DMA,           /* DMA */
 343         ATA_PROT_NCQ,           /* NCQ */
 344         ATAPI_PROT_NODATA,      /* packet command, no data */
 345         ATAPI_PROT_PIO,         /* packet command, PIO data xfer*/
 346         ATAPI_PROT_DMA,         /* packet command with special DMA sauce */
 347 };
 348
 349 enum ata_ioctls {
 350         ATA_IOC_GET_IO32        = 0x309,
 351         ATA_IOC_SET_IO32        = 0x324,
 352 };
 353
 354 /* core structures */
 355
 356 struct ata_prd {
 357         __le32                  addr;
 358         __le32                  flags_len;
 359 };
 360
 361 struct ata_taskfile {
 362         unsigned long           flags;          /* ATA_TFLAG_xxx */
 363         u8                      protocol;       /* ATA_PROT_xxx */
 364
 365         u8                      ctl;            /* control reg */
 366
 367         u8                      hob_feature;    /* additional data */
 368         u8                      hob_nsect;      /* to support LBA48 */
 369         u8                      hob_lbal;
 370         u8                      hob_lbam;
 371         u8                      hob_lbah;
 372
 373         u8                      feature;
 374         u8                      nsect;
 375         u8                      lbal;
 376         u8                      lbam;
 377         u8                      lbah;
 378
 379         u8                      device;
 380
 381         u8                      command;        /* IO operation */
 382 };
 383
 384 /*
 385  * protocol tests
 386  */
 387 static inline unsigned int ata_prot_flags(u8 prot)
 388 {
 389         switch (prot) {
 390         case ATA_PROT_NODATA:
 391                 return 0;
 392         case ATA_PROT_PIO:
 393                 return ATA_PROT_FLAG_PIO;
 394         case ATA_PROT_DMA:
 395                 return ATA_PROT_FLAG_DMA;
 396         case ATA_PROT_NCQ:
 397                 return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
 398         case ATAPI_PROT_NODATA:
 399                 return ATA_PROT_FLAG_ATAPI;
 400         case ATAPI_PROT_PIO:
 401                 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
 402         case ATAPI_PROT_DMA:
 403                 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
 404         }
 405         return 0;
 406 }
 407
 408 static inline int ata_is_atapi(u8 prot)
 409 {
 410         return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
 411 }
 412
 413 static inline int ata_is_nodata(u8 prot)
 414 {
 415         return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
 416 }
 417
 418 static inline int ata_is_pio(u8 prot)
 419 {
 420         return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
 421 }
 422
 423 static inline int ata_is_dma(u8 prot)
 424 {
 425         return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
 426 }
 427
 428 static inline int ata_is_ncq(u8 prot)
 429 {
 430         return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
 431 }
 432
 433 static inline int ata_is_data(u8 prot)
 434 {
 435         return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
 436 }
 437
 438 /*
 439  * id tests
 440  */
 441 #define ata_id_is_ata(id)       (((id)[0] & (1 << 15)) == 0)
 442 #define ata_id_has_lba(id)      ((id)[49] & (1 << 9))
 443 #define ata_id_has_dma(id)      ((id)[49] & (1 << 8))
 444 #define ata_id_has_ncq(id)      ((id)[76] & (1 << 8))
 445 #define ata_id_queue_depth(id)  (((id)[75] & 0x1f) + 1)
 446 #define ata_id_removeable(id)   ((id)[0] & (1 << 7))
 447 #define ata_id_has_atapi_AN(id) \
 448         ( (((id)[76] != 0x0000) && ((id)[76] != 0xffff)) && \
 449           ((id)[78] & (1 << 5)) )
 450 #define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
 451 #define ata_id_has_iordy(id) ((id)[49] & (1 << 11))
 452 #define ata_id_u32(id,n)        \
 453         (((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
 454 #define ata_id_u64(id,n)        \
 455         ( ((u64) (id)[(n) + 3] << 48) | \
 456           ((u64) (id)[(n) + 2] << 32) | \
 457           ((u64) (id)[(n) + 1] << 16) | \
 458           ((u64) (id)[(n) + 0]) )
 459
 460 #define ata_id_cdb_intr(id)     (((id)[0] & 0x60) == 0x20)
 461
 462 static inline bool ata_id_has_hipm(const u16 *id)
 463 {
 464         u16 val = id[76];
 465
 466         if (val == 0 || val == 0xffff)
 467                 return false;
 468
 469         return val & (1 << 9);
 470 }
 471
 472 static inline bool ata_id_has_dipm(const u16 *id)
 473 {
 474         u16 val = id[78];
 475
 476         if (val == 0 || val == 0xffff)
 477                 return false;
 478
 479         return val & (1 << 3);
 480 }
 481
 482
 483 static inline int ata_id_has_fua(const u16 *id)
 484 {
 485         if ((id[84] & 0xC000) != 0x4000)
 486                 return 0;
 487         return id[84] & (1 << 6);
 488 }
 489
 490 static inline int ata_id_has_flush(const u16 *id)
 491 {
 492         if ((id[83] & 0xC000) != 0x4000)
 493                 return 0;
 494         return id[83] & (1 << 12);
 495 }
 496
 497 static inline int ata_id_has_flush_ext(const u16 *id)
 498 {
 499         if ((id[83] & 0xC000) != 0x4000)
 500                 return 0;
 501         return id[83] & (1 << 13);
 502 }
 503
 504 static inline int ata_id_has_lba48(const u16 *id)
 505 {
 506         if ((id[83] & 0xC000) != 0x4000)
 507                 return 0;
 508         if (!ata_id_u64(id, 100))
 509                 return 0;
 510         return id[83] & (1 << 10);
 511 }
 512
 513 static inline int ata_id_hpa_enabled(const u16 *id)
 514 {
 515         /* Yes children, word 83 valid bits cover word 82 data */
 516         if ((id[83] & 0xC000) != 0x4000)
 517                 return 0;
 518         /* And 87 covers 85-87 */
 519         if ((id[87] & 0xC000) != 0x4000)
 520                 return 0;
 521         /* Check command sets enabled as well as supported */
 522         if ((id[85] & ( 1 << 10)) == 0)
 523                 return 0;
 524         return id[82] & (1 << 10);
 525 }
 526
 527 static inline int ata_id_has_wcache(const u16 *id)
 528 {
 529         /* Yes children, word 83 valid bits cover word 82 data */
 530         if ((id[83] & 0xC000) != 0x4000)
 531                 return 0;
 532         return id[82] & (1 << 5);
 533 }
 534
 535 static inline int ata_id_has_pm(const u16 *id)
 536 {
 537         if ((id[83] & 0xC000) != 0x4000)
 538                 return 0;
 539         return id[82] & (1 << 3);
 540 }
 541
 542 static inline int ata_id_rahead_enabled(const u16 *id)
 543 {
 544         if ((id[87] & 0xC000) != 0x4000)
 545                 return 0;
 546         return id[85] & (1 << 6);
 547 }
 548
 549 static inline int ata_id_wcache_enabled(const u16 *id)
 550 {
 551         if ((id[87] & 0xC000) != 0x4000)
 552                 return 0;
 553         return id[85] & (1 << 5);
 554 }
 555
 556 /**
 557  *      ata_id_major_version    -       get ATA level of drive
 558  *      @id: Identify data
 559  *
 560  *      Caveats:
 561  *              ATA-1 considers identify optional
 562  *              ATA-2 introduces mandatory identify
 563  *              ATA-3 introduces word 80 and accurate reporting
 564  *
 565  *      The practical impact of this is that ata_id_major_version cannot
 566  *      reliably report on drives below ATA3.
 567  */
 568
 569 static inline unsigned int ata_id_major_version(const u16 *id)
 570 {
 571         unsigned int mver;
 572
 573         if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
 574                 return 0;
 575
 576         for (mver = 14; mver >= 1; mver--)
 577                 if (id[ATA_ID_MAJOR_VER] & (1 << mver))
 578                         break;
 579         return mver;
 580 }
 581
 582 static inline int ata_id_is_sata(const u16 *id)
 583 {
 584         return ata_id_major_version(id) >= 5 && id[93] == 0;
 585 }
 586
 587 static inline int ata_id_has_tpm(const u16 *id)
 588 {
 589         /* The TPM bits are only valid on ATA8 */
 590         if (ata_id_major_version(id) < 8)
 591                 return 0;
 592         if ((id[48] & 0xC000) != 0x4000)
 593                 return 0;
 594         return id[48] & (1 << 0);
 595 }
 596
 597 static inline int ata_id_has_dword_io(const u16 *id)
 598 {
 599         /* ATA 8 reuses this flag for "trusted" computing */
 600         if (ata_id_major_version(id) > 7)
 601                 return 0;
 602         if (id[48] & (1 << 0))
 603                 return 1;
 604         return 0;
 605 }
 606
 607 static inline int ata_id_current_chs_valid(const u16 *id)
 608 {
 609         /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
 610            has not been issued to the device then the values of
 611            id[54] to id[56] are vendor specific. */
 612         return (id[53] & 0x01) && /* Current translation valid */
 613                 id[54] &&  /* cylinders in current translation */
 614                 id[55] &&  /* heads in current translation */
 615                 id[55] <= 16 &&
 616                 id[56];    /* sectors in current translation */
 617 }
 618
 619 static inline int ata_id_is_cfa(const u16 *id)
 620 {
 621         u16 v = id[0];
 622         if (v == 0x848A)        /* Standard CF */
 623                 return 1;
 624         /* Could be CF hiding as standard ATA */
 625         if (ata_id_major_version(id) >= 3 &&  id[82] != 0xFFFF &&
 626                         (id[82] & ( 1 << 2)))
 627                 return 1;
 628         return 0;
 629 }
 630
 631 static inline int ata_drive_40wire(const u16 *dev_id)
 632 {
 633         if (ata_id_is_sata(dev_id))
 634                 return 0;       /* SATA */
 635         if ((dev_id[93] & 0xE000) == 0x6000)
 636                 return 0;       /* 80 wire */
 637         return 1;
 638 }
 639
 640 static inline int ata_drive_40wire_relaxed(const u16 *dev_id)
 641 {
 642         if ((dev_id[93] & 0x2000) == 0x2000)
 643                 return 0;       /* 80 wire */
 644         return 1;
 645 }
 646
 647 static inline int atapi_cdb_len(const u16 *dev_id)
 648 {
 649         u16 tmp = dev_id[0] & 0x3;
 650         switch (tmp) {
 651         case 0:         return 12;
 652         case 1:         return 16;
 653         default:        return -1;
 654         }
 655 }
 656
 657 static inline int atapi_command_packet_set(const u16 *dev_id)
 658 {
 659         return (dev_id[0] >> 8) & 0x1f;
 660 }
 661
 662 static inline int is_multi_taskfile(struct ata_taskfile *tf)
 663 {
 664         return (tf->command == ATA_CMD_READ_MULTI) ||
 665                (tf->command == ATA_CMD_WRITE_MULTI) ||
 666                (tf->command == ATA_CMD_READ_MULTI_EXT) ||
 667                (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
 668                (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
 669 }
 670
 671 static inline int ata_ok(u8 status)
 672 {
 673         return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
 674                         == ATA_DRDY);
 675 }
 676
 677 static inline int lba_28_ok(u64 block, u32 n_block)
 678 {
 679         /* check the ending block number */
 680         return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
 681 }
 682
 683 static inline int lba_48_ok(u64 block, u32 n_block)
 684 {
 685         /* check the ending block number */
 686         return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
 687 }
 688
 689 #define sata_pmp_gscr_vendor(gscr)      ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
 690 #define sata_pmp_gscr_devid(gscr)       ((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
 691 #define sata_pmp_gscr_rev(gscr)         (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
 692 #define sata_pmp_gscr_ports(gscr)       ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
 693
 694 #endif /* __LINUX_ATA_H__ */