include/linux/libata.h

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
ata_msg_init
ata_is_atapi
ata_is_pio
ata_is_dma
ata_is_ncq
ata_is_data
is_multi_taskfile
sata_ehc_deb_timing
ata_port_is_dummy
ata_sas_port_suspend
ata_sas_port_resume
ata_acpi_init_gtm
ata_acpi_init_gtm
ata_acpi_stm
ata_acpi_gtm
ata_acpi_gtm_xfermask
ata_acpi_cbl_80wire
sata_pmp_supported
sata_pmp_attached
ata_is_host_link
sata_pmp_supported
sata_pmp_attached
ata_is_host_link
sata_srst_pmp
__printf
__printf
ata_tag_valid
ata_class_enabled
ata_class_disabled
ata_class_absent
ata_dev_enabled
ata_dev_disabled
ata_dev_absent
ata_link_max_devices
ata_link_active
ata_ncq_enabled
ata_fpdma_dsm_supported
ata_fpdma_read_log_supported
ata_fpdma_zac_mgmt_in_supported
ata_fpdma_zac_mgmt_out_supported
ata_qc_set_polling
__ata_qc_from_tag
ata_qc_from_tag
ata_qc_raw_nbytes
ata_tf_init
ata_qc_reinit
ata_try_flush_cache
ac_err_mask
__ac_err_mask
ata_shost_to_port
ata_check_ready
ata_deadline
ata_using_mwdma
ata_using_udma
ata_dma_enabled
ata_sff_busy_wait
ata_wait_idle
   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  Copyright 2003-2005 Red Hat, Inc.  All rights reserved.
   4  *  Copyright 2003-2005 Jeff Garzik
   5  *
   6  *  libata documentation is available via 'make {ps|pdf}docs',
   7  *  as Documentation/driver-api/libata.rst
   8  */
   9 
  10 #ifndef __LINUX_LIBATA_H__
  11 #define __LINUX_LIBATA_H__
  12 
  13 #include <linux/delay.h>
  14 #include <linux/jiffies.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/dma-mapping.h>
  17 #include <linux/scatterlist.h>
  18 #include <linux/io.h>
  19 #include <linux/ata.h>
  20 #include <linux/workqueue.h>
  21 #include <scsi/scsi_host.h>
  22 #include <linux/acpi.h>
  23 #include <linux/cdrom.h>
  24 #include <linux/sched.h>
  25 
  26 /*
  27  * Define if arch has non-standard setup.  This is a _PCI_ standard
  28  * not a legacy or ISA standard.
  29  */
  30 #ifdef CONFIG_ATA_NONSTANDARD
  31 #include <asm/libata-portmap.h>
  32 #else
  33 #define ATA_PRIMARY_IRQ(dev)    14
  34 #define ATA_SECONDARY_IRQ(dev)  15
  35 #endif
  36 
  37 /*
  38  * compile-time options: to be removed as soon as all the drivers are
  39  * converted to the new debugging mechanism
  40  */
  41 #undef ATA_DEBUG                /* debugging output */
  42 #undef ATA_VERBOSE_DEBUG        /* yet more debugging output */
  43 #undef ATA_IRQ_TRAP             /* define to ack screaming irqs */
  44 #undef ATA_NDEBUG               /* define to disable quick runtime checks */
  45 
  46 
  47 /* note: prints function name for you */
  48 #ifdef ATA_DEBUG
  49 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
  50 #ifdef ATA_VERBOSE_DEBUG
  51 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
  52 #else
  53 #define VPRINTK(fmt, args...)
  54 #endif  /* ATA_VERBOSE_DEBUG */
  55 #else
  56 #define DPRINTK(fmt, args...)
  57 #define VPRINTK(fmt, args...)
  58 #endif  /* ATA_DEBUG */
  59 
  60 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
  61 
  62 #define ata_print_version_once(dev, version)                    \
  63 ({                                                              \
  64         static bool __print_once;                               \
  65                                                                 \
  66         if (!__print_once) {                                    \
  67                 __print_once = true;                            \
  68                 ata_print_version(dev, version);                \
  69         }                                                       \
  70 })
  71 
  72 /* NEW: debug levels */
  73 #define HAVE_LIBATA_MSG 1
  74 
  75 enum {
  76         ATA_MSG_DRV     = 0x0001,
  77         ATA_MSG_INFO    = 0x0002,
  78         ATA_MSG_PROBE   = 0x0004,
  79         ATA_MSG_WARN    = 0x0008,
  80         ATA_MSG_MALLOC  = 0x0010,
  81         ATA_MSG_CTL     = 0x0020,
  82         ATA_MSG_INTR    = 0x0040,
  83         ATA_MSG_ERR     = 0x0080,
  84 };
  85 
  86 #define ata_msg_drv(p)    ((p)->msg_enable & ATA_MSG_DRV)
  87 #define ata_msg_info(p)   ((p)->msg_enable & ATA_MSG_INFO)
  88 #define ata_msg_probe(p)  ((p)->msg_enable & ATA_MSG_PROBE)
  89 #define ata_msg_warn(p)   ((p)->msg_enable & ATA_MSG_WARN)
  90 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
  91 #define ata_msg_ctl(p)    ((p)->msg_enable & ATA_MSG_CTL)
  92 #define ata_msg_intr(p)   ((p)->msg_enable & ATA_MSG_INTR)
  93 #define ata_msg_err(p)    ((p)->msg_enable & ATA_MSG_ERR)
  94 
  95 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
  96 {
  97         if (dval < 0 || dval >= (sizeof(u32) * 8))
  98                 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
  99         if (!dval)
 100                 return 0;
 101         return (1 << dval) - 1;
 102 }
 103 
 104 /* defines only for the constants which don't work well as enums */
 105 #define ATA_TAG_POISON          0xfafbfcfdU
 106 
 107 enum {
 108         /* various global constants */
 109         LIBATA_MAX_PRD          = ATA_MAX_PRD / 2,
 110         LIBATA_DUMB_MAX_PRD     = ATA_MAX_PRD / 4,      /* Worst case */
 111         ATA_DEF_QUEUE           = 1,
 112         ATA_MAX_QUEUE           = 32,
 113         ATA_TAG_INTERNAL        = ATA_MAX_QUEUE,
 114         ATA_SHORT_PAUSE         = 16,
 115 
 116         ATAPI_MAX_DRAIN         = 16 << 10,
 117 
 118         ATA_ALL_DEVICES         = (1 << ATA_MAX_DEVICES) - 1,
 119 
 120         ATA_SHT_EMULATED        = 1,
 121         ATA_SHT_THIS_ID         = -1,
 122 
 123         /* struct ata_taskfile flags */
 124         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
 125         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
 126         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
 127         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
 128         ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
 129         ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
 130         ATA_TFLAG_POLLING       = (1 << 6), /* set nIEN to 1 and use polling */
 131 
 132         /* struct ata_device stuff */
 133         ATA_DFLAG_LBA           = (1 << 0), /* device supports LBA */
 134         ATA_DFLAG_LBA48         = (1 << 1), /* device supports LBA48 */
 135         ATA_DFLAG_CDB_INTR      = (1 << 2), /* device asserts INTRQ when ready for CDB */
 136         ATA_DFLAG_NCQ           = (1 << 3), /* device supports NCQ */
 137         ATA_DFLAG_FLUSH_EXT     = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
 138         ATA_DFLAG_ACPI_PENDING  = (1 << 5), /* ACPI resume action pending */
 139         ATA_DFLAG_ACPI_FAILED   = (1 << 6), /* ACPI on devcfg has failed */
 140         ATA_DFLAG_AN            = (1 << 7), /* AN configured */
 141         ATA_DFLAG_TRUSTED       = (1 << 8), /* device supports trusted send/recv */
 142         ATA_DFLAG_DMADIR        = (1 << 10), /* device requires DMADIR */
 143         ATA_DFLAG_CFG_MASK      = (1 << 12) - 1,
 144 
 145         ATA_DFLAG_PIO           = (1 << 12), /* device limited to PIO mode */
 146         ATA_DFLAG_NCQ_OFF       = (1 << 13), /* device limited to non-NCQ mode */
 147         ATA_DFLAG_SLEEPING      = (1 << 15), /* device is sleeping */
 148         ATA_DFLAG_DUBIOUS_XFER  = (1 << 16), /* data transfer not verified */
 149         ATA_DFLAG_NO_UNLOAD     = (1 << 17), /* device doesn't support unload */
 150         ATA_DFLAG_UNLOCK_HPA    = (1 << 18), /* unlock HPA */
 151         ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */
 152         ATA_DFLAG_NCQ_PRIO      = (1 << 20), /* device supports NCQ priority */
 153         ATA_DFLAG_NCQ_PRIO_ENABLE = (1 << 21), /* Priority cmds sent to dev */
 154         ATA_DFLAG_INIT_MASK     = (1 << 24) - 1,
 155 
 156         ATA_DFLAG_DETACH        = (1 << 24),
 157         ATA_DFLAG_DETACHED      = (1 << 25),
 158 
 159         ATA_DFLAG_DA            = (1 << 26), /* device supports Device Attention */
 160         ATA_DFLAG_DEVSLP        = (1 << 27), /* device supports Device Sleep */
 161         ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
 162         ATA_DFLAG_D_SENSE       = (1 << 29), /* Descriptor sense requested */
 163         ATA_DFLAG_ZAC           = (1 << 30), /* ZAC device */
 164 
 165         ATA_DEV_UNKNOWN         = 0,    /* unknown device */
 166         ATA_DEV_ATA             = 1,    /* ATA device */
 167         ATA_DEV_ATA_UNSUP       = 2,    /* ATA device (unsupported) */
 168         ATA_DEV_ATAPI           = 3,    /* ATAPI device */
 169         ATA_DEV_ATAPI_UNSUP     = 4,    /* ATAPI device (unsupported) */
 170         ATA_DEV_PMP             = 5,    /* SATA port multiplier */
 171         ATA_DEV_PMP_UNSUP       = 6,    /* SATA port multiplier (unsupported) */
 172         ATA_DEV_SEMB            = 7,    /* SEMB */
 173         ATA_DEV_SEMB_UNSUP      = 8,    /* SEMB (unsupported) */
 174         ATA_DEV_ZAC             = 9,    /* ZAC device */
 175         ATA_DEV_ZAC_UNSUP       = 10,   /* ZAC device (unsupported) */
 176         ATA_DEV_NONE            = 11,   /* no device */
 177 
 178         /* struct ata_link flags */
 179         ATA_LFLAG_NO_HRST       = (1 << 1), /* avoid hardreset */
 180         ATA_LFLAG_NO_SRST       = (1 << 2), /* avoid softreset */
 181         ATA_LFLAG_ASSUME_ATA    = (1 << 3), /* assume ATA class */
 182         ATA_LFLAG_ASSUME_SEMB   = (1 << 4), /* assume SEMB class */
 183         ATA_LFLAG_ASSUME_CLASS  = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
 184         ATA_LFLAG_NO_RETRY      = (1 << 5), /* don't retry this link */
 185         ATA_LFLAG_DISABLED      = (1 << 6), /* link is disabled */
 186         ATA_LFLAG_SW_ACTIVITY   = (1 << 7), /* keep activity stats */
 187         ATA_LFLAG_NO_LPM        = (1 << 8), /* disable LPM on this link */
 188         ATA_LFLAG_RST_ONCE      = (1 << 9), /* limit recovery to one reset */
 189         ATA_LFLAG_CHANGED       = (1 << 10), /* LPM state changed on this link */
 190         ATA_LFLAG_NO_DB_DELAY   = (1 << 11), /* no debounce delay on link resume */
 191 
 192         /* struct ata_port flags */
 193         ATA_FLAG_SLAVE_POSS     = (1 << 0), /* host supports slave dev */
 194                                             /* (doesn't imply presence) */
 195         ATA_FLAG_SATA           = (1 << 1),
 196         ATA_FLAG_NO_LPM         = (1 << 2), /* host not happy with LPM */
 197         ATA_FLAG_NO_LOG_PAGE    = (1 << 5), /* do not issue log page read */
 198         ATA_FLAG_NO_ATAPI       = (1 << 6), /* No ATAPI support */
 199         ATA_FLAG_PIO_DMA        = (1 << 7), /* PIO cmds via DMA */
 200         ATA_FLAG_PIO_LBA48      = (1 << 8), /* Host DMA engine is LBA28 only */
 201         ATA_FLAG_PIO_POLLING    = (1 << 9), /* use polling PIO if LLD
 202                                              * doesn't handle PIO interrupts */
 203         ATA_FLAG_NCQ            = (1 << 10), /* host supports NCQ */
 204         ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
 205         ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
 206         ATA_FLAG_DEBUGMSG       = (1 << 13),
 207         ATA_FLAG_FPDMA_AA               = (1 << 14), /* driver supports Auto-Activate */
 208         ATA_FLAG_IGN_SIMPLEX    = (1 << 15), /* ignore SIMPLEX */
 209         ATA_FLAG_NO_IORDY       = (1 << 16), /* controller lacks iordy */
 210         ATA_FLAG_ACPI_SATA      = (1 << 17), /* need native SATA ACPI layout */
 211         ATA_FLAG_AN             = (1 << 18), /* controller supports AN */
 212         ATA_FLAG_PMP            = (1 << 19), /* controller supports PMP */
 213         ATA_FLAG_FPDMA_AUX      = (1 << 20), /* controller supports H2DFIS aux field */
 214         ATA_FLAG_EM             = (1 << 21), /* driver supports enclosure
 215                                               * management */
 216         ATA_FLAG_SW_ACTIVITY    = (1 << 22), /* driver supports sw activity
 217                                               * led */
 218         ATA_FLAG_NO_DIPM        = (1 << 23), /* host not happy with DIPM */
 219         ATA_FLAG_SAS_HOST       = (1 << 24), /* SAS host */
 220 
 221         /* bits 24:31 of ap->flags are reserved for LLD specific flags */
 222 
 223 
 224         /* struct ata_port pflags */
 225         ATA_PFLAG_EH_PENDING    = (1 << 0), /* EH pending */
 226         ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
 227         ATA_PFLAG_FROZEN        = (1 << 2), /* port is frozen */
 228         ATA_PFLAG_RECOVERED     = (1 << 3), /* recovery action performed */
 229         ATA_PFLAG_LOADING       = (1 << 4), /* boot/loading probe */
 230         ATA_PFLAG_SCSI_HOTPLUG  = (1 << 6), /* SCSI hotplug scheduled */
 231         ATA_PFLAG_INITIALIZING  = (1 << 7), /* being initialized, don't touch */
 232         ATA_PFLAG_RESETTING     = (1 << 8), /* reset in progress */
 233         ATA_PFLAG_UNLOADING     = (1 << 9), /* driver is being unloaded */
 234         ATA_PFLAG_UNLOADED      = (1 << 10), /* driver is unloaded */
 235 
 236         ATA_PFLAG_SUSPENDED     = (1 << 17), /* port is suspended (power) */
 237         ATA_PFLAG_PM_PENDING    = (1 << 18), /* PM operation pending */
 238         ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
 239 
 240         ATA_PFLAG_PIO32         = (1 << 20),  /* 32bit PIO */
 241         ATA_PFLAG_PIO32CHANGE   = (1 << 21),  /* 32bit PIO can be turned on/off */
 242         ATA_PFLAG_EXTERNAL      = (1 << 22),  /* eSATA/external port */
 243 
 244         /* struct ata_queued_cmd flags */
 245         ATA_QCFLAG_ACTIVE       = (1 << 0), /* cmd not yet ack'd to scsi lyer */
 246         ATA_QCFLAG_DMAMAP       = (1 << 1), /* SG table is DMA mapped */
 247         ATA_QCFLAG_IO           = (1 << 3), /* standard IO command */
 248         ATA_QCFLAG_RESULT_TF    = (1 << 4), /* result TF requested */
 249         ATA_QCFLAG_CLEAR_EXCL   = (1 << 5), /* clear excl_link on completion */
 250         ATA_QCFLAG_QUIET        = (1 << 6), /* don't report device error */
 251         ATA_QCFLAG_RETRY        = (1 << 7), /* retry after failure */
 252 
 253         ATA_QCFLAG_FAILED       = (1 << 16), /* cmd failed and is owned by EH */
 254         ATA_QCFLAG_SENSE_VALID  = (1 << 17), /* sense data valid */
 255         ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
 256 
 257         /* host set flags */
 258         ATA_HOST_SIMPLEX        = (1 << 0),     /* Host is simplex, one DMA channel per host only */
 259         ATA_HOST_STARTED        = (1 << 1),     /* Host started */
 260         ATA_HOST_PARALLEL_SCAN  = (1 << 2),     /* Ports on this host can be scanned in parallel */
 261         ATA_HOST_IGNORE_ATA     = (1 << 3),     /* Ignore ATA devices on this host. */
 262 
 263         /* bits 24:31 of host->flags are reserved for LLD specific flags */
 264 
 265         /* various lengths of time */
 266         ATA_TMOUT_BOOT          = 30000,        /* heuristic */
 267         ATA_TMOUT_BOOT_QUICK    =  7000,        /* heuristic */
 268         ATA_TMOUT_INTERNAL_QUICK = 5000,
 269         ATA_TMOUT_MAX_PARK      = 30000,
 270 
 271         /*
 272          * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms.  2s
 273          * is too much without parallel probing.  Use 2s if parallel
 274          * probing is available, 800ms otherwise.
 275          */
 276         ATA_TMOUT_FF_WAIT_LONG  =  2000,
 277         ATA_TMOUT_FF_WAIT       =   800,
 278 
 279         /* Spec mandates to wait for ">= 2ms" before checking status
 280          * after reset.  We wait 150ms, because that was the magic
 281          * delay used for ATAPI devices in Hale Landis's ATADRVR, for
 282          * the period of time between when the ATA command register is
 283          * written, and then status is checked.  Because waiting for
 284          * "a while" before checking status is fine, post SRST, we
 285          * perform this magic delay here as well.
 286          *
 287          * Old drivers/ide uses the 2mS rule and then waits for ready.
 288          */
 289         ATA_WAIT_AFTER_RESET    =  150,
 290 
 291         /* If PMP is supported, we have to do follow-up SRST.  As some
 292          * PMPs don't send D2H Reg FIS after hardreset, LLDs are
 293          * advised to wait only for the following duration before
 294          * doing SRST.
 295          */
 296         ATA_TMOUT_PMP_SRST_WAIT = 5000,
 297 
 298         /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
 299          * be a spurious PHY event, so ignore the first PHY event that
 300          * occurs within 10s after the policy change.
 301          */
 302         ATA_TMOUT_SPURIOUS_PHY  = 10000,
 303 
 304         /* ATA bus states */
 305         BUS_UNKNOWN             = 0,
 306         BUS_DMA                 = 1,
 307         BUS_IDLE                = 2,
 308         BUS_NOINTR              = 3,
 309         BUS_NODATA              = 4,
 310         BUS_TIMER               = 5,
 311         BUS_PIO                 = 6,
 312         BUS_EDD                 = 7,
 313         BUS_IDENTIFY            = 8,
 314         BUS_PACKET              = 9,
 315 
 316         /* SATA port states */
 317         PORT_UNKNOWN            = 0,
 318         PORT_ENABLED            = 1,
 319         PORT_DISABLED           = 2,
 320 
 321         /* encoding various smaller bitmaps into a single
 322          * unsigned long bitmap
 323          */
 324         ATA_NR_PIO_MODES        = 7,
 325         ATA_NR_MWDMA_MODES      = 5,
 326         ATA_NR_UDMA_MODES       = 8,
 327 
 328         ATA_SHIFT_PIO           = 0,
 329         ATA_SHIFT_MWDMA         = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
 330         ATA_SHIFT_UDMA          = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
 331         ATA_SHIFT_PRIO          = 6,
 332 
 333         ATA_PRIO_HIGH           = 2,
 334         /* size of buffer to pad xfers ending on unaligned boundaries */
 335         ATA_DMA_PAD_SZ          = 4,
 336 
 337         /* ering size */
 338         ATA_ERING_SIZE          = 32,
 339 
 340         /* return values for ->qc_defer */
 341         ATA_DEFER_LINK          = 1,
 342         ATA_DEFER_PORT          = 2,
 343 
 344         /* desc_len for ata_eh_info and context */
 345         ATA_EH_DESC_LEN         = 80,
 346 
 347         /* reset / recovery action types */
 348         ATA_EH_REVALIDATE       = (1 << 0),
 349         ATA_EH_SOFTRESET        = (1 << 1), /* meaningful only in ->prereset */
 350         ATA_EH_HARDRESET        = (1 << 2), /* meaningful only in ->prereset */
 351         ATA_EH_RESET            = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
 352         ATA_EH_ENABLE_LINK      = (1 << 3),
 353         ATA_EH_PARK             = (1 << 5), /* unload heads and stop I/O */
 354 
 355         ATA_EH_PERDEV_MASK      = ATA_EH_REVALIDATE | ATA_EH_PARK,
 356         ATA_EH_ALL_ACTIONS      = ATA_EH_REVALIDATE | ATA_EH_RESET |
 357                                   ATA_EH_ENABLE_LINK,
 358 
 359         /* ata_eh_info->flags */
 360         ATA_EHI_HOTPLUGGED      = (1 << 0),  /* could have been hotplugged */
 361         ATA_EHI_NO_AUTOPSY      = (1 << 2),  /* no autopsy */
 362         ATA_EHI_QUIET           = (1 << 3),  /* be quiet */
 363         ATA_EHI_NO_RECOVERY     = (1 << 4),  /* no recovery */
 364 
 365         ATA_EHI_DID_SOFTRESET   = (1 << 16), /* already soft-reset this port */
 366         ATA_EHI_DID_HARDRESET   = (1 << 17), /* already soft-reset this port */
 367         ATA_EHI_PRINTINFO       = (1 << 18), /* print configuration info */
 368         ATA_EHI_SETMODE         = (1 << 19), /* configure transfer mode */
 369         ATA_EHI_POST_SETMODE    = (1 << 20), /* revalidating after setmode */
 370 
 371         ATA_EHI_DID_RESET       = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
 372 
 373         /* mask of flags to transfer *to* the slave link */
 374         ATA_EHI_TO_SLAVE_MASK   = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
 375 
 376         /* max tries if error condition is still set after ->error_handler */
 377         ATA_EH_MAX_TRIES        = 5,
 378 
 379         /* sometimes resuming a link requires several retries */
 380         ATA_LINK_RESUME_TRIES   = 5,
 381 
 382         /* how hard are we gonna try to probe/recover devices */
 383         ATA_PROBE_MAX_TRIES     = 3,
 384         ATA_EH_DEV_TRIES        = 3,
 385         ATA_EH_PMP_TRIES        = 5,
 386         ATA_EH_PMP_LINK_TRIES   = 3,
 387 
 388         SATA_PMP_RW_TIMEOUT     = 3000,         /* PMP read/write timeout */
 389 
 390         /* This should match the actual table size of
 391          * ata_eh_cmd_timeout_table in libata-eh.c.
 392          */
 393         ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
 394 
 395         /* Horkage types. May be set by libata or controller on drives
 396            (some horkage may be drive/controller pair dependent */
 397 
 398         ATA_HORKAGE_DIAGNOSTIC  = (1 << 0),     /* Failed boot diag */
 399         ATA_HORKAGE_NODMA       = (1 << 1),     /* DMA problems */
 400         ATA_HORKAGE_NONCQ       = (1 << 2),     /* Don't use NCQ */
 401         ATA_HORKAGE_MAX_SEC_128 = (1 << 3),     /* Limit max sects to 128 */
 402         ATA_HORKAGE_BROKEN_HPA  = (1 << 4),     /* Broken HPA */
 403         ATA_HORKAGE_DISABLE     = (1 << 5),     /* Disable it */
 404         ATA_HORKAGE_HPA_SIZE    = (1 << 6),     /* native size off by one */
 405         ATA_HORKAGE_IVB         = (1 << 8),     /* cbl det validity bit bugs */
 406         ATA_HORKAGE_STUCK_ERR   = (1 << 9),     /* stuck ERR on next PACKET */
 407         ATA_HORKAGE_BRIDGE_OK   = (1 << 10),    /* no bridge limits */
 408         ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
 409                                                     not multiple of 16 bytes */
 410         ATA_HORKAGE_FIRMWARE_WARN = (1 << 12),  /* firmware update warning */
 411         ATA_HORKAGE_1_5_GBPS    = (1 << 13),    /* force 1.5 Gbps */
 412         ATA_HORKAGE_NOSETXFER   = (1 << 14),    /* skip SETXFER, SATA only */
 413         ATA_HORKAGE_BROKEN_FPDMA_AA     = (1 << 15),    /* skip AA */
 414         ATA_HORKAGE_DUMP_ID     = (1 << 16),    /* dump IDENTIFY data */
 415         ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17),  /* Set max sects to 65535 */
 416         ATA_HORKAGE_ATAPI_DMADIR = (1 << 18),   /* device requires dmadir */
 417         ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19),    /* don't use queued TRIM */
 418         ATA_HORKAGE_NOLPM       = (1 << 20),    /* don't use LPM */
 419         ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21),  /* some WDs have broken LPM */
 420         ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
 421         ATA_HORKAGE_NO_DMA_LOG  = (1 << 23),    /* don't use DMA for log read */
 422         ATA_HORKAGE_NOTRIM      = (1 << 24),    /* don't use TRIM */
 423         ATA_HORKAGE_MAX_SEC_1024 = (1 << 25),   /* Limit max sects to 1024 */
 424 
 425          /* DMA mask for user DMA control: User visible values; DO NOT
 426             renumber */
 427         ATA_DMA_MASK_ATA        = (1 << 0),     /* DMA on ATA Disk */
 428         ATA_DMA_MASK_ATAPI      = (1 << 1),     /* DMA on ATAPI */
 429         ATA_DMA_MASK_CFA        = (1 << 2),     /* DMA on CF Card */
 430 
 431         /* ATAPI command types */
 432         ATAPI_READ              = 0,            /* READs */
 433         ATAPI_WRITE             = 1,            /* WRITEs */
 434         ATAPI_READ_CD           = 2,            /* READ CD [MSF] */
 435         ATAPI_PASS_THRU         = 3,            /* SAT pass-thru */
 436         ATAPI_MISC              = 4,            /* the rest */
 437 
 438         /* Timing constants */
 439         ATA_TIMING_SETUP        = (1 << 0),
 440         ATA_TIMING_ACT8B        = (1 << 1),
 441         ATA_TIMING_REC8B        = (1 << 2),
 442         ATA_TIMING_CYC8B        = (1 << 3),
 443         ATA_TIMING_8BIT         = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
 444                                   ATA_TIMING_CYC8B,
 445         ATA_TIMING_ACTIVE       = (1 << 4),
 446         ATA_TIMING_RECOVER      = (1 << 5),
 447         ATA_TIMING_DMACK_HOLD   = (1 << 6),
 448         ATA_TIMING_CYCLE        = (1 << 7),
 449         ATA_TIMING_UDMA         = (1 << 8),
 450         ATA_TIMING_ALL          = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
 451                                   ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
 452                                   ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
 453                                   ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
 454                                   ATA_TIMING_UDMA,
 455 
 456         /* ACPI constants */
 457         ATA_ACPI_FILTER_SETXFER = 1 << 0,
 458         ATA_ACPI_FILTER_LOCK    = 1 << 1,
 459         ATA_ACPI_FILTER_DIPM    = 1 << 2,
 460         ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3,  /* FPDMA non-zero offset */
 461         ATA_ACPI_FILTER_FPDMA_AA = 1 << 4,      /* FPDMA auto activate */
 462 
 463         ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
 464                                   ATA_ACPI_FILTER_LOCK |
 465                                   ATA_ACPI_FILTER_DIPM,
 466 };
 467 
 468 enum ata_xfer_mask {
 469         ATA_MASK_PIO            = ((1LU << ATA_NR_PIO_MODES) - 1)
 470                                         << ATA_SHIFT_PIO,
 471         ATA_MASK_MWDMA          = ((1LU << ATA_NR_MWDMA_MODES) - 1)
 472                                         << ATA_SHIFT_MWDMA,
 473         ATA_MASK_UDMA           = ((1LU << ATA_NR_UDMA_MODES) - 1)
 474                                         << ATA_SHIFT_UDMA,
 475 };
 476 
 477 enum hsm_task_states {
 478         HSM_ST_IDLE,            /* no command on going */
 479         HSM_ST_FIRST,           /* (waiting the device to)
 480                                    write CDB or first data block */
 481         HSM_ST,                 /* (waiting the device to) transfer data */
 482         HSM_ST_LAST,            /* (waiting the device to) complete command */
 483         HSM_ST_ERR,             /* error */
 484 };
 485 
 486 enum ata_completion_errors {
 487         AC_ERR_DEV              = (1 << 0), /* device reported error */
 488         AC_ERR_HSM              = (1 << 1), /* host state machine violation */
 489         AC_ERR_TIMEOUT          = (1 << 2), /* timeout */
 490         AC_ERR_MEDIA            = (1 << 3), /* media error */
 491         AC_ERR_ATA_BUS          = (1 << 4), /* ATA bus error */
 492         AC_ERR_HOST_BUS         = (1 << 5), /* host bus error */
 493         AC_ERR_SYSTEM           = (1 << 6), /* system error */
 494         AC_ERR_INVALID          = (1 << 7), /* invalid argument */
 495         AC_ERR_OTHER            = (1 << 8), /* unknown */
 496         AC_ERR_NODEV_HINT       = (1 << 9), /* polling device detection hint */
 497         AC_ERR_NCQ              = (1 << 10), /* marker for offending NCQ qc */
 498 };
 499 
 500 /*
 501  * Link power management policy: If you alter this, you also need to
 502  * alter libata-scsi.c (for the ascii descriptions)
 503  */
 504 enum ata_lpm_policy {
 505         ATA_LPM_UNKNOWN,
 506         ATA_LPM_MAX_POWER,
 507         ATA_LPM_MED_POWER,
 508         ATA_LPM_MED_POWER_WITH_DIPM, /* Med power + DIPM as win IRST does */
 509         ATA_LPM_MIN_POWER_WITH_PARTIAL, /* Min Power + partial and slumber */
 510         ATA_LPM_MIN_POWER, /* Min power + no partial (slumber only) */
 511 };
 512 
 513 enum ata_lpm_hints {
 514         ATA_LPM_EMPTY           = (1 << 0), /* port empty/probing */
 515         ATA_LPM_HIPM            = (1 << 1), /* may use HIPM */
 516         ATA_LPM_WAKE_ONLY       = (1 << 2), /* only wake up link */
 517 };
 518 
 519 /* forward declarations */
 520 struct scsi_device;
 521 struct ata_port_operations;
 522 struct ata_port;
 523 struct ata_link;
 524 struct ata_queued_cmd;
 525 
 526 /* typedefs */
 527 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
 528 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
 529 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
 530                               unsigned long deadline);
 531 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
 532 
 533 extern struct device_attribute dev_attr_link_power_management_policy;
 534 extern struct device_attribute dev_attr_unload_heads;
 535 extern struct device_attribute dev_attr_ncq_prio_enable;
 536 extern struct device_attribute dev_attr_em_message_type;
 537 extern struct device_attribute dev_attr_em_message;
 538 extern struct device_attribute dev_attr_sw_activity;
 539 
 540 enum sw_activity {
 541         OFF,
 542         BLINK_ON,
 543         BLINK_OFF,
 544 };
 545 
 546 struct ata_taskfile {
 547         unsigned long           flags;          /* ATA_TFLAG_xxx */
 548         u8                      protocol;       /* ATA_PROT_xxx */
 549 
 550         u8                      ctl;            /* control reg */
 551 
 552         u8                      hob_feature;    /* additional data */
 553         u8                      hob_nsect;      /* to support LBA48 */
 554         u8                      hob_lbal;
 555         u8                      hob_lbam;
 556         u8                      hob_lbah;
 557 
 558         u8                      feature;
 559         u8                      nsect;
 560         u8                      lbal;
 561         u8                      lbam;
 562         u8                      lbah;
 563 
 564         u8                      device;
 565 
 566         u8                      command;        /* IO operation */
 567 
 568         u32                     auxiliary;      /* auxiliary field */
 569                                                 /* from SATA 3.1 and */
 570                                                 /* ATA-8 ACS-3 */
 571 };
 572 
 573 #ifdef CONFIG_ATA_SFF
 574 struct ata_ioports {
 575         void __iomem            *cmd_addr;
 576         void __iomem            *data_addr;
 577         void __iomem            *error_addr;
 578         void __iomem            *feature_addr;
 579         void __iomem            *nsect_addr;
 580         void __iomem            *lbal_addr;
 581         void __iomem            *lbam_addr;
 582         void __iomem            *lbah_addr;
 583         void __iomem            *device_addr;
 584         void __iomem            *status_addr;
 585         void __iomem            *command_addr;
 586         void __iomem            *altstatus_addr;
 587         void __iomem            *ctl_addr;
 588 #ifdef CONFIG_ATA_BMDMA
 589         void __iomem            *bmdma_addr;
 590 #endif /* CONFIG_ATA_BMDMA */
 591         void __iomem            *scr_addr;
 592 };
 593 #endif /* CONFIG_ATA_SFF */
 594 
 595 struct ata_host {
 596         spinlock_t              lock;
 597         struct device           *dev;
 598         void __iomem * const    *iomap;
 599         unsigned int            n_ports;
 600         unsigned int            n_tags;                 /* nr of NCQ tags */
 601         void                    *private_data;
 602         struct ata_port_operations *ops;
 603         unsigned long           flags;
 604         struct kref             kref;
 605 
 606         struct mutex            eh_mutex;
 607         struct task_struct      *eh_owner;
 608 
 609         struct ata_port         *simplex_claimed;       /* channel owning the DMA */
 610         struct ata_port         *ports[0];
 611 };
 612 
 613 struct ata_queued_cmd {
 614         struct ata_port         *ap;
 615         struct ata_device       *dev;
 616 
 617         struct scsi_cmnd        *scsicmd;
 618         void                    (*scsidone)(struct scsi_cmnd *);
 619 
 620         struct ata_taskfile     tf;
 621         u8                      cdb[ATAPI_CDB_LEN];
 622 
 623         unsigned long           flags;          /* ATA_QCFLAG_xxx */
 624         unsigned int            tag;            /* libata core tag */
 625         unsigned int            hw_tag;         /* driver tag */
 626         unsigned int            n_elem;
 627         unsigned int            orig_n_elem;
 628 
 629         int                     dma_dir;
 630 
 631         unsigned int            sect_size;
 632 
 633         unsigned int            nbytes;
 634         unsigned int            extrabytes;
 635         unsigned int            curbytes;
 636 
 637         struct scatterlist      sgent;
 638 
 639         struct scatterlist      *sg;
 640 
 641         struct scatterlist      *cursg;
 642         unsigned int            cursg_ofs;
 643 
 644         unsigned int            err_mask;
 645         struct ata_taskfile     result_tf;
 646         ata_qc_cb_t             complete_fn;
 647 
 648         void                    *private_data;
 649         void                    *lldd_task;
 650 };
 651 
 652 struct ata_port_stats {
 653         unsigned long           unhandled_irq;
 654         unsigned long           idle_irq;
 655         unsigned long           rw_reqbuf;
 656 };
 657 
 658 struct ata_ering_entry {
 659         unsigned int            eflags;
 660         unsigned int            err_mask;
 661         u64                     timestamp;
 662 };
 663 
 664 struct ata_ering {
 665         int                     cursor;
 666         struct ata_ering_entry  ring[ATA_ERING_SIZE];
 667 };
 668 
 669 struct ata_device {
 670         struct ata_link         *link;
 671         unsigned int            devno;          /* 0 or 1 */
 672         unsigned int            horkage;        /* List of broken features */
 673         unsigned long           flags;          /* ATA_DFLAG_xxx */
 674         struct scsi_device      *sdev;          /* attached SCSI device */
 675         void                    *private_data;
 676 #ifdef CONFIG_ATA_ACPI
 677         union acpi_object       *gtf_cache;
 678         unsigned int            gtf_filter;
 679 #endif
 680 #ifdef CONFIG_SATA_ZPODD
 681         void                    *zpodd;
 682 #endif
 683         struct device           tdev;
 684         /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
 685         u64                     n_sectors;      /* size of device, if ATA */
 686         u64                     n_native_sectors; /* native size, if ATA */
 687         unsigned int            class;          /* ATA_DEV_xxx */
 688         unsigned long           unpark_deadline;
 689 
 690         u8                      pio_mode;
 691         u8                      dma_mode;
 692         u8                      xfer_mode;
 693         unsigned int            xfer_shift;     /* ATA_SHIFT_xxx */
 694 
 695         unsigned int            multi_count;    /* sectors count for
 696                                                    READ/WRITE MULTIPLE */
 697         unsigned int            max_sectors;    /* per-device max sectors */
 698         unsigned int            cdb_len;
 699 
 700         /* per-dev xfer mask */
 701         unsigned long           pio_mask;
 702         unsigned long           mwdma_mask;
 703         unsigned long           udma_mask;
 704 
 705         /* for CHS addressing */
 706         u16                     cylinders;      /* Number of cylinders */
 707         u16                     heads;          /* Number of heads */
 708         u16                     sectors;        /* Number of sectors per track */
 709 
 710         union {
 711                 u16             id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
 712                 u32             gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
 713         } ____cacheline_aligned;
 714 
 715         /* DEVSLP Timing Variables from Identify Device Data Log */
 716         u8                      devslp_timing[ATA_LOG_DEVSLP_SIZE];
 717 
 718         /* NCQ send and receive log subcommand support */
 719         u8                      ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE];
 720         u8                      ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_SIZE];
 721 
 722         /* ZAC zone configuration */
 723         u32                     zac_zoned_cap;
 724         u32                     zac_zones_optimal_open;
 725         u32                     zac_zones_optimal_nonseq;
 726         u32                     zac_zones_max_open;
 727 
 728         /* error history */
 729         int                     spdn_cnt;
 730         /* ering is CLEAR_END, read comment above CLEAR_END */
 731         struct ata_ering        ering;
 732 };
 733 
 734 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
 735  * cleared to zero on ata_dev_init().
 736  */
 737 #define ATA_DEVICE_CLEAR_BEGIN          offsetof(struct ata_device, n_sectors)
 738 #define ATA_DEVICE_CLEAR_END            offsetof(struct ata_device, ering)
 739 
 740 struct ata_eh_info {
 741         struct ata_device       *dev;           /* offending device */
 742         u32                     serror;         /* SError from LLDD */
 743         unsigned int            err_mask;       /* port-wide err_mask */
 744         unsigned int            action;         /* ATA_EH_* action mask */
 745         unsigned int            dev_action[ATA_MAX_DEVICES]; /* dev EH action */
 746         unsigned int            flags;          /* ATA_EHI_* flags */
 747 
 748         unsigned int            probe_mask;
 749 
 750         char                    desc[ATA_EH_DESC_LEN];
 751         int                     desc_len;
 752 };
 753 
 754 struct ata_eh_context {
 755         struct ata_eh_info      i;
 756         int                     tries[ATA_MAX_DEVICES];
 757         int                     cmd_timeout_idx[ATA_MAX_DEVICES]
 758                                                [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
 759         unsigned int            classes[ATA_MAX_DEVICES];
 760         unsigned int            did_probe_mask;
 761         unsigned int            unloaded_mask;
 762         unsigned int            saved_ncq_enabled;
 763         u8                      saved_xfer_mode[ATA_MAX_DEVICES];
 764         /* timestamp for the last reset attempt or success */
 765         unsigned long           last_reset;
 766 };
 767 
 768 struct ata_acpi_drive
 769 {
 770         u32 pio;
 771         u32 dma;
 772 } __packed;
 773 
 774 struct ata_acpi_gtm {
 775         struct ata_acpi_drive drive[2];
 776         u32 flags;
 777 } __packed;
 778 
 779 struct ata_link {
 780         struct ata_port         *ap;
 781         int                     pmp;            /* port multiplier port # */
 782 
 783         struct device           tdev;
 784         unsigned int            active_tag;     /* active tag on this link */
 785         u32                     sactive;        /* active NCQ commands */
 786 
 787         unsigned int            flags;          /* ATA_LFLAG_xxx */
 788 
 789         u32                     saved_scontrol; /* SControl on probe */
 790         unsigned int            hw_sata_spd_limit;
 791         unsigned int            sata_spd_limit;
 792         unsigned int            sata_spd;       /* current SATA PHY speed */
 793         enum ata_lpm_policy     lpm_policy;
 794 
 795         /* record runtime error info, protected by host_set lock */
 796         struct ata_eh_info      eh_info;
 797         /* EH context */
 798         struct ata_eh_context   eh_context;
 799 
 800         struct ata_device       device[ATA_MAX_DEVICES];
 801 
 802         unsigned long           last_lpm_change; /* when last LPM change happened */
 803 };
 804 #define ATA_LINK_CLEAR_BEGIN            offsetof(struct ata_link, active_tag)
 805 #define ATA_LINK_CLEAR_END              offsetof(struct ata_link, device[0])
 806 
 807 struct ata_port {
 808         struct Scsi_Host        *scsi_host; /* our co-allocated scsi host */
 809         struct ata_port_operations *ops;
 810         spinlock_t              *lock;
 811         /* Flags owned by the EH context. Only EH should touch these once the
 812            port is active */
 813         unsigned long           flags;  /* ATA_FLAG_xxx */
 814         /* Flags that change dynamically, protected by ap->lock */
 815         unsigned int            pflags; /* ATA_PFLAG_xxx */
 816         unsigned int            print_id; /* user visible unique port ID */
 817         unsigned int            local_port_no; /* host local port num */
 818         unsigned int            port_no; /* 0 based port no. inside the host */
 819 
 820 #ifdef CONFIG_ATA_SFF
 821         struct ata_ioports      ioaddr; /* ATA cmd/ctl/dma register blocks */
 822         u8                      ctl;    /* cache of ATA control register */
 823         u8                      last_ctl;       /* Cache last written value */
 824         struct ata_link*        sff_pio_task_link; /* link currently used */
 825         struct delayed_work     sff_pio_task;
 826 #ifdef CONFIG_ATA_BMDMA
 827         struct ata_bmdma_prd    *bmdma_prd;     /* BMDMA SG list */
 828         dma_addr_t              bmdma_prd_dma;  /* and its DMA mapping */
 829 #endif /* CONFIG_ATA_BMDMA */
 830 #endif /* CONFIG_ATA_SFF */
 831 
 832         unsigned int            pio_mask;
 833         unsigned int            mwdma_mask;
 834         unsigned int            udma_mask;
 835         unsigned int            cbl;    /* cable type; ATA_CBL_xxx */
 836 
 837         struct ata_queued_cmd   qcmd[ATA_MAX_QUEUE + 1];
 838         unsigned long           sas_tag_allocated; /* for sas tag allocation only */
 839         u64                     qc_active;
 840         int                     nr_active_links; /* #links with active qcs */
 841         unsigned int            sas_last_tag;   /* track next tag hw expects */
 842 
 843         struct ata_link         link;           /* host default link */
 844         struct ata_link         *slave_link;    /* see ata_slave_link_init() */
 845 
 846         int                     nr_pmp_links;   /* nr of available PMP links */
 847         struct ata_link         *pmp_link;      /* array of PMP links */
 848         struct ata_link         *excl_link;     /* for PMP qc exclusion */
 849 
 850         struct ata_port_stats   stats;
 851         struct ata_host         *host;
 852         struct device           *dev;
 853         struct device           tdev;
 854 
 855         struct mutex            scsi_scan_mutex;
 856         struct delayed_work     hotplug_task;
 857         struct work_struct      scsi_rescan_task;
 858 
 859         unsigned int            hsm_task_state;
 860 
 861         u32                     msg_enable;
 862         struct list_head        eh_done_q;
 863         wait_queue_head_t       eh_wait_q;
 864         int                     eh_tries;
 865         struct completion       park_req_pending;
 866 
 867         pm_message_t            pm_mesg;
 868         enum ata_lpm_policy     target_lpm_policy;
 869 
 870         struct timer_list       fastdrain_timer;
 871         unsigned long           fastdrain_cnt;
 872 
 873         int                     em_message_type;
 874         void                    *private_data;
 875 
 876 #ifdef CONFIG_ATA_ACPI
 877         struct ata_acpi_gtm     __acpi_init_gtm; /* use ata_acpi_init_gtm() */
 878 #endif
 879         /* owned by EH */
 880         u8                      sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
 881 };
 882 
 883 /* The following initializer overrides a method to NULL whether one of
 884  * its parent has the method defined or not.  This is equivalent to
 885  * ERR_PTR(-ENOENT).  Unfortunately, ERR_PTR doesn't render a constant
 886  * expression and thus can't be used as an initializer.
 887  */
 888 #define ATA_OP_NULL             (void *)(unsigned long)(-ENOENT)
 889 
 890 struct ata_port_operations {
 891         /*
 892          * Command execution
 893          */
 894         int  (*qc_defer)(struct ata_queued_cmd *qc);
 895         int  (*check_atapi_dma)(struct ata_queued_cmd *qc);
 896         void (*qc_prep)(struct ata_queued_cmd *qc);
 897         unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
 898         bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
 899 
 900         /*
 901          * Configuration and exception handling
 902          */
 903         int  (*cable_detect)(struct ata_port *ap);
 904         unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
 905         void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
 906         void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
 907         int  (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
 908         unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
 909 
 910         void (*dev_config)(struct ata_device *dev);
 911 
 912         void (*freeze)(struct ata_port *ap);
 913         void (*thaw)(struct ata_port *ap);
 914         ata_prereset_fn_t       prereset;
 915         ata_reset_fn_t          softreset;
 916         ata_reset_fn_t          hardreset;
 917         ata_postreset_fn_t      postreset;
 918         ata_prereset_fn_t       pmp_prereset;
 919         ata_reset_fn_t          pmp_softreset;
 920         ata_reset_fn_t          pmp_hardreset;
 921         ata_postreset_fn_t      pmp_postreset;
 922         void (*error_handler)(struct ata_port *ap);
 923         void (*lost_interrupt)(struct ata_port *ap);
 924         void (*post_internal_cmd)(struct ata_queued_cmd *qc);
 925         void (*sched_eh)(struct ata_port *ap);
 926         void (*end_eh)(struct ata_port *ap);
 927 
 928         /*
 929          * Optional features
 930          */
 931         int  (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
 932         int  (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
 933         void (*pmp_attach)(struct ata_port *ap);
 934         void (*pmp_detach)(struct ata_port *ap);
 935         int  (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
 936                         unsigned hints);
 937 
 938         /*
 939          * Start, stop, suspend and resume
 940          */
 941         int  (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
 942         int  (*port_resume)(struct ata_port *ap);
 943         int  (*port_start)(struct ata_port *ap);
 944         void (*port_stop)(struct ata_port *ap);
 945         void (*host_stop)(struct ata_host *host);
 946 
 947 #ifdef CONFIG_ATA_SFF
 948         /*
 949          * SFF / taskfile oriented ops
 950          */
 951         void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
 952         void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
 953         u8   (*sff_check_status)(struct ata_port *ap);
 954         u8   (*sff_check_altstatus)(struct ata_port *ap);
 955         void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
 956         void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
 957         void (*sff_exec_command)(struct ata_port *ap,
 958                                  const struct ata_taskfile *tf);
 959         unsigned int (*sff_data_xfer)(struct ata_queued_cmd *qc,
 960                         unsigned char *buf, unsigned int buflen, int rw);
 961         void (*sff_irq_on)(struct ata_port *);
 962         bool (*sff_irq_check)(struct ata_port *);
 963         void (*sff_irq_clear)(struct ata_port *);
 964         void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
 965 
 966 #ifdef CONFIG_ATA_BMDMA
 967         void (*bmdma_setup)(struct ata_queued_cmd *qc);
 968         void (*bmdma_start)(struct ata_queued_cmd *qc);
 969         void (*bmdma_stop)(struct ata_queued_cmd *qc);
 970         u8   (*bmdma_status)(struct ata_port *ap);
 971 #endif /* CONFIG_ATA_BMDMA */
 972 #endif /* CONFIG_ATA_SFF */
 973 
 974         ssize_t (*em_show)(struct ata_port *ap, char *buf);
 975         ssize_t (*em_store)(struct ata_port *ap, const char *message,
 976                             size_t size);
 977         ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
 978         ssize_t (*sw_activity_store)(struct ata_device *dev,
 979                                      enum sw_activity val);
 980         ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state,
 981                                         ssize_t size);
 982 
 983         /*
 984          * Obsolete
 985          */
 986         void (*phy_reset)(struct ata_port *ap);
 987         void (*eng_timeout)(struct ata_port *ap);
 988 
 989         /*
 990          * ->inherits must be the last field and all the preceding
 991          * fields must be pointers.
 992          */
 993         const struct ata_port_operations        *inherits;
 994 };
 995 
 996 struct ata_port_info {
 997         unsigned long           flags;
 998         unsigned long           link_flags;
 999         unsigned long           pio_mask;
1000         unsigned long           mwdma_mask;
1001         unsigned long           udma_mask;
1002         struct ata_port_operations *port_ops;
1003         void                    *private_data;
1004 };
1005 
1006 struct ata_timing {
1007         unsigned short mode;            /* ATA mode */
1008         unsigned short setup;           /* t1 */
1009         unsigned short act8b;           /* t2 for 8-bit I/O */
1010         unsigned short rec8b;           /* t2i for 8-bit I/O */
1011         unsigned short cyc8b;           /* t0 for 8-bit I/O */
1012         unsigned short active;          /* t2 or tD */
1013         unsigned short recover;         /* t2i or tK */
1014         unsigned short dmack_hold;      /* tj */
1015         unsigned short cycle;           /* t0 */
1016         unsigned short udma;            /* t2CYCTYP/2 */
1017 };
1018 
1019 /*
1020  * Core layer - drivers/ata/libata-core.c
1021  */
1022 extern const unsigned long sata_deb_timing_normal[];
1023 extern const unsigned long sata_deb_timing_hotplug[];
1024 extern const unsigned long sata_deb_timing_long[];
1025 
1026 extern struct ata_port_operations ata_dummy_port_ops;
1027 extern const struct ata_port_info ata_dummy_port_info;
1028 
1029 static inline bool ata_is_atapi(u8 prot)
1030 {
1031         return prot & ATA_PROT_FLAG_ATAPI;
1032 }
1033 
1034 static inline bool ata_is_pio(u8 prot)
1035 {
1036         return prot & ATA_PROT_FLAG_PIO;
1037 }
1038 
1039 static inline bool ata_is_dma(u8 prot)
1040 {
1041         return prot & ATA_PROT_FLAG_DMA;
1042 }
1043 
1044 static inline bool ata_is_ncq(u8 prot)
1045 {
1046         return prot & ATA_PROT_FLAG_NCQ;
1047 }
1048 
1049 static inline bool ata_is_data(u8 prot)
1050 {
1051         return prot & (ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA);
1052 }
1053 
1054 static inline int is_multi_taskfile(struct ata_taskfile *tf)
1055 {
1056         return (tf->command == ATA_CMD_READ_MULTI) ||
1057                (tf->command == ATA_CMD_WRITE_MULTI) ||
1058                (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1059                (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1060                (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1061 }
1062 
1063 static inline const unsigned long *
1064 sata_ehc_deb_timing(struct ata_eh_context *ehc)
1065 {
1066         if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
1067                 return sata_deb_timing_hotplug;
1068         else
1069                 return sata_deb_timing_normal;
1070 }
1071 
1072 static inline int ata_port_is_dummy(struct ata_port *ap)
1073 {
1074         return ap->ops == &ata_dummy_port_ops;
1075 }
1076 
1077 extern int sata_set_spd(struct ata_link *link);
1078 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
1079 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
1080                                 int (*check_ready)(struct ata_link *link));
1081 extern int sata_link_debounce(struct ata_link *link,
1082                         const unsigned long *params, unsigned long deadline);
1083 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
1084                             unsigned long deadline);
1085 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
1086                              bool spm_wakeup);
1087 extern int sata_link_hardreset(struct ata_link *link,
1088                         const unsigned long *timing, unsigned long deadline,
1089                         bool *online, int (*check_ready)(struct ata_link *));
1090 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
1091                               unsigned long deadline);
1092 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1093 
1094 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
1095 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
1096                         const struct ata_port_info * const * ppi, int n_ports);
1097 extern int ata_slave_link_init(struct ata_port *ap);
1098 extern void ata_host_get(struct ata_host *host);
1099 extern void ata_host_put(struct ata_host *host);
1100 extern int ata_host_start(struct ata_host *host);
1101 extern int ata_host_register(struct ata_host *host,
1102                              struct scsi_host_template *sht);
1103 extern int ata_host_activate(struct ata_host *host, int irq,
1104                              irq_handler_t irq_handler, unsigned long irq_flags,
1105                              struct scsi_host_template *sht);
1106 extern void ata_host_detach(struct ata_host *host);
1107 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
1108 extern int ata_scsi_detect(struct scsi_host_template *sht);
1109 extern int ata_scsi_ioctl(struct scsi_device *dev, unsigned int cmd,
1110                           void __user *arg);
1111 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1112 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1113                             unsigned int cmd, void __user *arg);
1114 extern void ata_sas_port_destroy(struct ata_port *);
1115 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1116                                            struct ata_port_info *, struct Scsi_Host *);
1117 extern void ata_sas_async_probe(struct ata_port *ap);
1118 extern int ata_sas_sync_probe(struct ata_port *ap);
1119 extern int ata_sas_port_init(struct ata_port *);
1120 extern int ata_sas_port_start(struct ata_port *ap);
1121 extern int ata_sas_tport_add(struct device *parent, struct ata_port *ap);
1122 extern void ata_sas_tport_delete(struct ata_port *ap);
1123 extern void ata_sas_port_stop(struct ata_port *ap);
1124 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1125 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1126 extern int sata_scr_valid(struct ata_link *link);
1127 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1128 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1129 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1130 extern bool ata_link_online(struct ata_link *link);
1131 extern bool ata_link_offline(struct ata_link *link);
1132 #ifdef CONFIG_PM
1133 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1134 extern void ata_host_resume(struct ata_host *host);
1135 extern void ata_sas_port_suspend(struct ata_port *ap);
1136 extern void ata_sas_port_resume(struct ata_port *ap);
1137 #else
1138 static inline void ata_sas_port_suspend(struct ata_port *ap)
1139 {
1140 }
1141 static inline void ata_sas_port_resume(struct ata_port *ap)
1142 {
1143 }
1144 #endif
1145 extern int ata_ratelimit(void);
1146 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1147 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1148                         u32 val, unsigned long interval, unsigned long timeout);
1149 extern int atapi_cmd_type(u8 opcode);
1150 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1151                           u8 pmp, int is_cmd, u8 *fis);
1152 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1153 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1154                         unsigned long mwdma_mask, unsigned long udma_mask);
1155 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1156                         unsigned long *pio_mask, unsigned long *mwdma_mask,
1157                         unsigned long *udma_mask);
1158 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1159 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1160 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1161 extern const char *ata_mode_string(unsigned long xfer_mask);
1162 extern unsigned long ata_id_xfermask(const u16 *id);
1163 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1164 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1165 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1166                  unsigned int n_elem);
1167 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1168 extern void ata_dev_disable(struct ata_device *adev);
1169 extern void ata_id_string(const u16 *id, unsigned char *s,
1170                           unsigned int ofs, unsigned int len);
1171 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1172                             unsigned int ofs, unsigned int len);
1173 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1174                                         struct ata_taskfile *tf, u16 *id);
1175 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1176 extern int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active);
1177 extern u64 ata_qc_get_active(struct ata_port *ap);
1178 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1179 extern int ata_std_bios_param(struct scsi_device *sdev,
1180                               struct block_device *bdev,
1181                               sector_t capacity, int geom[]);
1182 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1183 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1184 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1185 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1186                                        int queue_depth);
1187 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1188                                     int queue_depth);
1189 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1190 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1191 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1192 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1193 extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
1194 
1195 extern int ata_cable_40wire(struct ata_port *ap);
1196 extern int ata_cable_80wire(struct ata_port *ap);
1197 extern int ata_cable_sata(struct ata_port *ap);
1198 extern int ata_cable_ignore(struct ata_port *ap);
1199 extern int ata_cable_unknown(struct ata_port *ap);
1200 
1201 /* Timing helpers */
1202 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1203 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1204 extern int ata_timing_compute(struct ata_device *, unsigned short,
1205                               struct ata_timing *, int, int);
1206 extern void ata_timing_merge(const struct ata_timing *,
1207                              const struct ata_timing *, struct ata_timing *,
1208                              unsigned int);
1209 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1210 
1211 /* PCI */
1212 #ifdef CONFIG_PCI
1213 struct pci_dev;
1214 
1215 struct pci_bits {
1216         unsigned int            reg;    /* PCI config register to read */
1217         unsigned int            width;  /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1218         unsigned long           mask;
1219         unsigned long           val;
1220 };
1221 
1222 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1223 extern void ata_pci_shutdown_one(struct pci_dev *pdev);
1224 extern void ata_pci_remove_one(struct pci_dev *pdev);
1225 
1226 #ifdef CONFIG_PM
1227 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1228 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1229 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1230 extern int ata_pci_device_resume(struct pci_dev *pdev);
1231 #endif /* CONFIG_PM */
1232 #endif /* CONFIG_PCI */
1233 
1234 struct platform_device;
1235 
1236 extern int ata_platform_remove_one(struct platform_device *pdev);
1237 
1238 /*
1239  * ACPI - drivers/ata/libata-acpi.c
1240  */
1241 #ifdef CONFIG_ATA_ACPI
1242 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1243 {
1244         if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1245                 return &ap->__acpi_init_gtm;
1246         return NULL;
1247 }
1248 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1249 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1250 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1251                                     const struct ata_acpi_gtm *gtm);
1252 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1253 #else
1254 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1255 {
1256         return NULL;
1257 }
1258 
1259 static inline int ata_acpi_stm(const struct ata_port *ap,
1260                                struct ata_acpi_gtm *stm)
1261 {
1262         return -ENOSYS;
1263 }
1264 
1265 static inline int ata_acpi_gtm(const struct ata_port *ap,
1266                                struct ata_acpi_gtm *stm)
1267 {
1268         return -ENOSYS;
1269 }
1270 
1271 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1272                                         const struct ata_acpi_gtm *gtm)
1273 {
1274         return 0;
1275 }
1276 
1277 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1278                                       const struct ata_acpi_gtm *gtm)
1279 {
1280         return 0;
1281 }
1282 #endif
1283 
1284 /*
1285  * EH - drivers/ata/libata-eh.c
1286  */
1287 extern void ata_port_schedule_eh(struct ata_port *ap);
1288 extern void ata_port_wait_eh(struct ata_port *ap);
1289 extern int ata_link_abort(struct ata_link *link);
1290 extern int ata_port_abort(struct ata_port *ap);
1291 extern int ata_port_freeze(struct ata_port *ap);
1292 extern int sata_async_notification(struct ata_port *ap);
1293 
1294 extern void ata_eh_freeze_port(struct ata_port *ap);
1295 extern void ata_eh_thaw_port(struct ata_port *ap);
1296 
1297 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1298 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1299 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1300 
1301 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1302                       ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1303                       ata_postreset_fn_t postreset);
1304 extern void ata_std_error_handler(struct ata_port *ap);
1305 extern void ata_std_sched_eh(struct ata_port *ap);
1306 extern void ata_std_end_eh(struct ata_port *ap);
1307 extern int ata_link_nr_enabled(struct ata_link *link);
1308 
1309 /*
1310  * Base operations to inherit from and initializers for sht
1311  *
1312  * Operations
1313  *
1314  * base  : Common to all libata drivers.
1315  * sata  : SATA controllers w/ native interface.
1316  * pmp   : SATA controllers w/ PMP support.
1317  * sff   : SFF ATA controllers w/o BMDMA support.
1318  * bmdma : SFF ATA controllers w/ BMDMA support.
1319  *
1320  * sht initializers
1321  *
1322  * BASE  : Common to all libata drivers.  The user must set
1323  *         sg_tablesize and dma_boundary.
1324  * PIO   : SFF ATA controllers w/ only PIO support.
1325  * BMDMA : SFF ATA controllers w/ BMDMA support.  sg_tablesize and
1326  *         dma_boundary are set to BMDMA limits.
1327  * NCQ   : SATA controllers supporting NCQ.  The user must set
1328  *         sg_tablesize, dma_boundary and can_queue.
1329  */
1330 extern const struct ata_port_operations ata_base_port_ops;
1331 extern const struct ata_port_operations sata_port_ops;
1332 extern struct device_attribute *ata_common_sdev_attrs[];
1333 
1334 /*
1335  * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
1336  * by the edge drivers.  Because the 'module' field of sht must be the
1337  * edge driver's module reference, otherwise the driver can be unloaded
1338  * even if the scsi_device is being accessed.
1339  */
1340 #define ATA_BASE_SHT(drv_name)                                  \
1341         .module                 = THIS_MODULE,                  \
1342         .name                   = drv_name,                     \
1343         .ioctl                  = ata_scsi_ioctl,               \
1344         .queuecommand           = ata_scsi_queuecmd,            \
1345         .can_queue              = ATA_DEF_QUEUE,                \
1346         .tag_alloc_policy       = BLK_TAG_ALLOC_RR,             \
1347         .this_id                = ATA_SHT_THIS_ID,              \
1348         .emulated               = ATA_SHT_EMULATED,             \
1349         .proc_name              = drv_name,                     \
1350         .slave_configure        = ata_scsi_slave_config,        \
1351         .slave_destroy          = ata_scsi_slave_destroy,       \
1352         .bios_param             = ata_std_bios_param,           \
1353         .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1354         .sdev_attrs             = ata_common_sdev_attrs
1355 
1356 #define ATA_NCQ_SHT(drv_name)                                   \
1357         ATA_BASE_SHT(drv_name),                                 \
1358         .change_queue_depth     = ata_scsi_change_queue_depth
1359 
1360 /*
1361  * PMP helpers
1362  */
1363 #ifdef CONFIG_SATA_PMP
1364 static inline bool sata_pmp_supported(struct ata_port *ap)
1365 {
1366         return ap->flags & ATA_FLAG_PMP;
1367 }
1368 
1369 static inline bool sata_pmp_attached(struct ata_port *ap)
1370 {
1371         return ap->nr_pmp_links != 0;
1372 }
1373 
1374 static inline bool ata_is_host_link(const struct ata_link *link)
1375 {
1376         return link == &link->ap->link || link == link->ap->slave_link;
1377 }
1378 #else /* CONFIG_SATA_PMP */
1379 static inline bool sata_pmp_supported(struct ata_port *ap)
1380 {
1381         return false;
1382 }
1383 
1384 static inline bool sata_pmp_attached(struct ata_port *ap)
1385 {
1386         return false;
1387 }
1388 
1389 static inline bool ata_is_host_link(const struct ata_link *link)
1390 {
1391         return 1;
1392 }
1393 #endif /* CONFIG_SATA_PMP */
1394 
1395 static inline int sata_srst_pmp(struct ata_link *link)
1396 {
1397         if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1398                 return SATA_PMP_CTRL_PORT;
1399         return link->pmp;
1400 }
1401 
1402 /*
1403  * printk helpers
1404  */
1405 __printf(3, 4)
1406 void ata_port_printk(const struct ata_port *ap, const char *level,
1407                      const char *fmt, ...);
1408 __printf(3, 4)
1409 void ata_link_printk(const struct ata_link *link, const char *level,
1410                      const char *fmt, ...);
1411 __printf(3, 4)
1412 void ata_dev_printk(const struct ata_device *dev, const char *level,
1413                     const char *fmt, ...);
1414 
1415 #define ata_port_err(ap, fmt, ...)                              \
1416         ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1417 #define ata_port_warn(ap, fmt, ...)                             \
1418         ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1419 #define ata_port_notice(ap, fmt, ...)                           \
1420         ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1421 #define ata_port_info(ap, fmt, ...)                             \
1422         ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1423 #define ata_port_dbg(ap, fmt, ...)                              \
1424         ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1425 
1426 #define ata_link_err(link, fmt, ...)                            \
1427         ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1428 #define ata_link_warn(link, fmt, ...)                           \
1429         ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1430 #define ata_link_notice(link, fmt, ...)                         \
1431         ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1432 #define ata_link_info(link, fmt, ...)                           \
1433         ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1434 #define ata_link_dbg(link, fmt, ...)                            \
1435         ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1436 
1437 #define ata_dev_err(dev, fmt, ...)                              \
1438         ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1439 #define ata_dev_warn(dev, fmt, ...)                             \
1440         ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1441 #define ata_dev_notice(dev, fmt, ...)                           \
1442         ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1443 #define ata_dev_info(dev, fmt, ...)                             \
1444         ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1445 #define ata_dev_dbg(dev, fmt, ...)                              \
1446         ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1447 
1448 void ata_print_version(const struct device *dev, const char *version);
1449 
1450 /*
1451  * ata_eh_info helpers
1452  */
1453 extern __printf(2, 3)
1454 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1455 extern __printf(2, 3)
1456 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1457 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1458 
1459 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1460 {
1461         ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1462         ehi->flags |= ATA_EHI_HOTPLUGGED;
1463         ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1464         ehi->err_mask |= AC_ERR_ATA_BUS;
1465 }
1466 
1467 /*
1468  * port description helpers
1469  */
1470 extern __printf(2, 3)
1471 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1472 #ifdef CONFIG_PCI
1473 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1474                                const char *name);
1475 #endif
1476 
1477 static inline bool ata_tag_internal(unsigned int tag)
1478 {
1479         return tag == ATA_TAG_INTERNAL;
1480 }
1481 
1482 static inline bool ata_tag_valid(unsigned int tag)
1483 {
1484         return tag < ATA_MAX_QUEUE || ata_tag_internal(tag);
1485 }
1486 
1487 #define __ata_qc_for_each(ap, qc, tag, max_tag, fn)             \
1488         for ((tag) = 0; (tag) < (max_tag) &&                    \
1489              ({ qc = fn((ap), (tag)); 1; }); (tag)++)           \
1490 
1491 /*
1492  * Internal use only, iterate commands ignoring error handling and
1493  * status of 'qc'.
1494  */
1495 #define ata_qc_for_each_raw(ap, qc, tag)                                        \
1496         __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, __ata_qc_from_tag)
1497 
1498 /*
1499  * Iterate all potential commands that can be queued
1500  */
1501 #define ata_qc_for_each(ap, qc, tag)                                    \
1502         __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, ata_qc_from_tag)
1503 
1504 /*
1505  * Like ata_qc_for_each, but with the internal tag included
1506  */
1507 #define ata_qc_for_each_with_internal(ap, qc, tag)                      \
1508         __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE + 1, ata_qc_from_tag)
1509 
1510 /*
1511  * device helpers
1512  */
1513 static inline unsigned int ata_class_enabled(unsigned int class)
1514 {
1515         return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1516                 class == ATA_DEV_PMP || class == ATA_DEV_SEMB ||
1517                 class == ATA_DEV_ZAC;
1518 }
1519 
1520 static inline unsigned int ata_class_disabled(unsigned int class)
1521 {
1522         return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1523                 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP ||
1524                 class == ATA_DEV_ZAC_UNSUP;
1525 }
1526 
1527 static inline unsigned int ata_class_absent(unsigned int class)
1528 {
1529         return !ata_class_enabled(class) && !ata_class_disabled(class);
1530 }
1531 
1532 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1533 {
1534         return ata_class_enabled(dev->class);
1535 }
1536 
1537 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1538 {
1539         return ata_class_disabled(dev->class);
1540 }
1541 
1542 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1543 {
1544         return ata_class_absent(dev->class);
1545 }
1546 
1547 /*
1548  * link helpers
1549  */
1550 static inline int ata_link_max_devices(const struct ata_link *link)
1551 {
1552         if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1553                 return 2;
1554         return 1;
1555 }
1556 
1557 static inline int ata_link_active(struct ata_link *link)
1558 {
1559         return ata_tag_valid(link->active_tag) || link->sactive;
1560 }
1561 
1562 /*
1563  * Iterators
1564  *
1565  * ATA_LITER_* constants are used to select link iteration mode and
1566  * ATA_DITER_* device iteration mode.
1567  *
1568  * For a custom iteration directly using ata_{link|dev}_next(), if
1569  * @link or @dev, respectively, is NULL, the first element is
1570  * returned.  @dev and @link can be any valid device or link and the
1571  * next element according to the iteration mode will be returned.
1572  * After the last element, NULL is returned.
1573  */
1574 enum ata_link_iter_mode {
1575         ATA_LITER_EDGE,         /* if present, PMP links only; otherwise,
1576                                  * host link.  no slave link */
1577         ATA_LITER_HOST_FIRST,   /* host link followed by PMP or slave links */
1578         ATA_LITER_PMP_FIRST,    /* PMP links followed by host link,
1579                                  * slave link still comes after host link */
1580 };
1581 
1582 enum ata_dev_iter_mode {
1583         ATA_DITER_ENABLED,
1584         ATA_DITER_ENABLED_REVERSE,
1585         ATA_DITER_ALL,
1586         ATA_DITER_ALL_REVERSE,
1587 };
1588 
1589 extern struct ata_link *ata_link_next(struct ata_link *link,
1590                                       struct ata_port *ap,
1591                                       enum ata_link_iter_mode mode);
1592 
1593 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1594                                        struct ata_link *link,
1595                                        enum ata_dev_iter_mode mode);
1596 
1597 /*
1598  * Shortcut notation for iterations
1599  *
1600  * ata_for_each_link() iterates over each link of @ap according to
1601  * @mode.  @link points to the current link in the loop.  @link is
1602  * NULL after loop termination.  ata_for_each_dev() works the same way
1603  * except that it iterates over each device of @link.
1604  *
1605  * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1606  * specified when using the following shorthand notations.  Only the
1607  * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1608  * specified.  This not only increases brevity but also makes it
1609  * impossible to use ATA_LITER_* for device iteration or vice-versa.
1610  */
1611 #define ata_for_each_link(link, ap, mode) \
1612         for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1613              (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1614 
1615 #define ata_for_each_dev(dev, link, mode) \
1616         for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1617              (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1618 
1619 /**
1620  *      ata_ncq_enabled - Test whether NCQ is enabled
1621  *      @dev: ATA device to test for
1622  *
1623  *      LOCKING:
1624  *      spin_lock_irqsave(host lock)
1625  *
1626  *      RETURNS:
1627  *      1 if NCQ is enabled for @dev, 0 otherwise.
1628  */
1629 static inline int ata_ncq_enabled(struct ata_device *dev)
1630 {
1631         return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1632                               ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1633 }
1634 
1635 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev)
1636 {
1637         return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1638                 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &
1639                  ATA_LOG_NCQ_SEND_RECV_DSM_TRIM);
1640 }
1641 
1642 static inline bool ata_fpdma_read_log_supported(struct ata_device *dev)
1643 {
1644         return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1645                 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET] &
1646                  ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED);
1647 }
1648 
1649 static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev)
1650 {
1651         return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1652                 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] &
1653                 ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED);
1654 }
1655 
1656 static inline bool ata_fpdma_zac_mgmt_out_supported(struct ata_device *dev)
1657 {
1658         return (dev->ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OFFSET] &
1659                 ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OUT);
1660 }
1661 
1662 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1663 {
1664         qc->tf.ctl |= ATA_NIEN;
1665 }
1666 
1667 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1668                                                        unsigned int tag)
1669 {
1670         if (ata_tag_valid(tag))
1671                 return &ap->qcmd[tag];
1672         return NULL;
1673 }
1674 
1675 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1676                                                      unsigned int tag)
1677 {
1678         struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1679 
1680         if (unlikely(!qc) || !ap->ops->error_handler)
1681                 return qc;
1682 
1683         if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1684                           ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1685                 return qc;
1686 
1687         return NULL;
1688 }
1689 
1690 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1691 {
1692         return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1693 }
1694 
1695 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1696 {
1697         memset(tf, 0, sizeof(*tf));
1698 
1699 #ifdef CONFIG_ATA_SFF
1700         tf->ctl = dev->link->ap->ctl;
1701 #else
1702         tf->ctl = ATA_DEVCTL_OBS;
1703 #endif
1704         if (dev->devno == 0)
1705                 tf->device = ATA_DEVICE_OBS;
1706         else
1707                 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1708 }
1709 
1710 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1711 {
1712         qc->dma_dir = DMA_NONE;
1713         qc->sg = NULL;
1714         qc->flags = 0;
1715         qc->cursg = NULL;
1716         qc->cursg_ofs = 0;
1717         qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1718         qc->n_elem = 0;
1719         qc->err_mask = 0;
1720         qc->sect_size = ATA_SECT_SIZE;
1721 
1722         ata_tf_init(qc->dev, &qc->tf);
1723 
1724         /* init result_tf such that it indicates normal completion */
1725         qc->result_tf.command = ATA_DRDY;
1726         qc->result_tf.feature = 0;
1727 }
1728 
1729 static inline int ata_try_flush_cache(const struct ata_device *dev)
1730 {
1731         return ata_id_wcache_enabled(dev->id) ||
1732                ata_id_has_flush(dev->id) ||
1733                ata_id_has_flush_ext(dev->id);
1734 }
1735 
1736 static inline unsigned int ac_err_mask(u8 status)
1737 {
1738         if (status & (ATA_BUSY | ATA_DRQ))
1739                 return AC_ERR_HSM;
1740         if (status & (ATA_ERR | ATA_DF))
1741                 return AC_ERR_DEV;
1742         return 0;
1743 }
1744 
1745 static inline unsigned int __ac_err_mask(u8 status)
1746 {
1747         unsigned int mask = ac_err_mask(status);
1748         if (mask == 0)
1749                 return AC_ERR_OTHER;
1750         return mask;
1751 }
1752 
1753 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1754 {
1755         return *(struct ata_port **)&host->hostdata[0];
1756 }
1757 
1758 static inline int ata_check_ready(u8 status)
1759 {
1760         if (!(status & ATA_BUSY))
1761                 return 1;
1762 
1763         /* 0xff indicates either no device or device not ready */
1764         if (status == 0xff)
1765                 return -ENODEV;
1766 
1767         return 0;
1768 }
1769 
1770 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1771                                          unsigned long timeout_msecs)
1772 {
1773         return from_jiffies + msecs_to_jiffies(timeout_msecs);
1774 }
1775 
1776 /* Don't open code these in drivers as there are traps. Firstly the range may
1777    change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1778    > UDMA_0. Dyma ddreigiau */
1779 
1780 static inline int ata_using_mwdma(struct ata_device *adev)
1781 {
1782         if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1783                 return 1;
1784         return 0;
1785 }
1786 
1787 static inline int ata_using_udma(struct ata_device *adev)
1788 {
1789         if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1790                 return 1;
1791         return 0;
1792 }
1793 
1794 static inline int ata_dma_enabled(struct ata_device *adev)
1795 {
1796         return (adev->dma_mode == 0xFF ? 0 : 1);
1797 }
1798 
1799 /**************************************************************************
1800  * PMP - drivers/ata/libata-pmp.c
1801  */
1802 #ifdef CONFIG_SATA_PMP
1803 
1804 extern const struct ata_port_operations sata_pmp_port_ops;
1805 
1806 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1807 extern void sata_pmp_error_handler(struct ata_port *ap);
1808 
1809 #else /* CONFIG_SATA_PMP */
1810 
1811 #define sata_pmp_port_ops               sata_port_ops
1812 #define sata_pmp_qc_defer_cmd_switch    ata_std_qc_defer
1813 #define sata_pmp_error_handler          ata_std_error_handler
1814 
1815 #endif /* CONFIG_SATA_PMP */
1816 
1817 
1818 /**************************************************************************
1819  * SFF - drivers/ata/libata-sff.c
1820  */
1821 #ifdef CONFIG_ATA_SFF
1822 
1823 extern const struct ata_port_operations ata_sff_port_ops;
1824 extern const struct ata_port_operations ata_bmdma32_port_ops;
1825 
1826 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1827 #define ATA_PIO_SHT(drv_name)                                   \
1828         ATA_BASE_SHT(drv_name),                                 \
1829         .sg_tablesize           = LIBATA_MAX_PRD,               \
1830         .dma_boundary           = ATA_DMA_BOUNDARY
1831 
1832 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1833 extern u8 ata_sff_check_status(struct ata_port *ap);
1834 extern void ata_sff_pause(struct ata_port *ap);
1835 extern void ata_sff_dma_pause(struct ata_port *ap);
1836 extern int ata_sff_busy_sleep(struct ata_port *ap,
1837                               unsigned long timeout_pat, unsigned long timeout);
1838 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1839 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1840 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1841 extern void ata_sff_exec_command(struct ata_port *ap,
1842                                  const struct ata_taskfile *tf);
1843 extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc,
1844                         unsigned char *buf, unsigned int buflen, int rw);
1845 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc,
1846                         unsigned char *buf, unsigned int buflen, int rw);
1847 extern void ata_sff_irq_on(struct ata_port *ap);
1848 extern void ata_sff_irq_clear(struct ata_port *ap);
1849 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1850                             u8 status, int in_wq);
1851 extern void ata_sff_queue_work(struct work_struct *work);
1852 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1853                 unsigned long delay);
1854 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1855 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1856 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1857 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1858                                       struct ata_queued_cmd *qc);
1859 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1860 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1861 extern void ata_sff_freeze(struct ata_port *ap);
1862 extern void ata_sff_thaw(struct ata_port *ap);
1863 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1864 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1865                                           u8 *r_err);
1866 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1867                                     unsigned long deadline);
1868 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1869                              unsigned long deadline);
1870 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1871                                unsigned long deadline);
1872 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1873 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1874 extern void ata_sff_error_handler(struct ata_port *ap);
1875 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1876 #ifdef CONFIG_PCI
1877 extern int ata_pci_sff_init_host(struct ata_host *host);
1878 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1879                                     const struct ata_port_info * const * ppi,
1880                                     struct ata_host **r_host);
1881 extern int ata_pci_sff_activate_host(struct ata_host *host,
1882                                      irq_handler_t irq_handler,
1883                                      struct scsi_host_template *sht);
1884 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1885                 const struct ata_port_info * const * ppi,
1886                 struct scsi_host_template *sht, void *host_priv, int hflags);
1887 #endif /* CONFIG_PCI */
1888 
1889 #ifdef CONFIG_ATA_BMDMA
1890 
1891 extern const struct ata_port_operations ata_bmdma_port_ops;
1892 
1893 #define ATA_BMDMA_SHT(drv_name)                                 \
1894         ATA_BASE_SHT(drv_name),                                 \
1895         .sg_tablesize           = LIBATA_MAX_PRD,               \
1896         .dma_boundary           = ATA_DMA_BOUNDARY
1897 
1898 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1899 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1900 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1901 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1902                                       struct ata_queued_cmd *qc);
1903 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1904 extern void ata_bmdma_error_handler(struct ata_port *ap);
1905 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1906 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1907 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1908 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1909 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1910 extern u8 ata_bmdma_status(struct ata_port *ap);
1911 extern int ata_bmdma_port_start(struct ata_port *ap);
1912 extern int ata_bmdma_port_start32(struct ata_port *ap);
1913 
1914 #ifdef CONFIG_PCI
1915 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1916 extern void ata_pci_bmdma_init(struct ata_host *host);
1917 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1918                                       const struct ata_port_info * const * ppi,
1919                                       struct ata_host **r_host);
1920 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1921                                   const struct ata_port_info * const * ppi,
1922                                   struct scsi_host_template *sht,
1923                                   void *host_priv, int hflags);
1924 #endif /* CONFIG_PCI */
1925 #endif /* CONFIG_ATA_BMDMA */
1926 
1927 /**
1928  *      ata_sff_busy_wait - Wait for a port status register
1929  *      @ap: Port to wait for.
1930  *      @bits: bits that must be clear
1931  *      @max: number of 10uS waits to perform
1932  *
1933  *      Waits up to max*10 microseconds for the selected bits in the port's
1934  *      status register to be cleared.
1935  *      Returns final value of status register.
1936  *
1937  *      LOCKING:
1938  *      Inherited from caller.
1939  */
1940 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1941                                    unsigned int max)
1942 {
1943         u8 status;
1944 
1945         do {
1946                 udelay(10);
1947                 status = ap->ops->sff_check_status(ap);
1948                 max--;
1949         } while (status != 0xff && (status & bits) && (max > 0));
1950 
1951         return status;
1952 }
1953 
1954 /**
1955  *      ata_wait_idle - Wait for a port to be idle.
1956  *      @ap: Port to wait for.
1957  *
1958  *      Waits up to 10ms for port's BUSY and DRQ signals to clear.
1959  *      Returns final value of status register.
1960  *
1961  *      LOCKING:
1962  *      Inherited from caller.
1963  */
1964 static inline u8 ata_wait_idle(struct ata_port *ap)
1965 {
1966         u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1967 
1968 #ifdef ATA_DEBUG
1969         if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1970                 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1971                                 status);
1972 #endif
1973 
1974         return status;
1975 }
1976 #endif /* CONFIG_ATA_SFF */
1977 
1978 #endif /* __LINUX_LIBATA_H__ */
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root/include/linux/libata.h

INCLUDED FROM

DEFINITIONS
