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 #include <linux/async.h> 26 27 /* 28 * Define if arch has non-standard setup. This is a _PCI_ standard 29 * not a legacy or ISA standard. 30 */ 31 #ifdef CONFIG_ATA_NONSTANDARD 32 #include <asm/libata-portmap.h> 33 #else 34 #define ATA_PRIMARY_IRQ(dev) 14 35 #define ATA_SECONDARY_IRQ(dev) 15 36 #endif 37 38 /* 39 * compile-time options: to be removed as soon as all the drivers are 40 * converted to the new debugging mechanism 41 */ 42 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 43 44 45 #define ata_print_version_once(dev, version) \ 46 ({ \ 47 static bool __print_once; \ 48 \ 49 if (!__print_once) { \ 50 __print_once = true; \ 51 ata_print_version(dev, version); \ 52 } \ 53 }) 54 55 /* defines only for the constants which don't work well as enums */ 56 #define ATA_TAG_POISON 0xfafbfcfdU 57 58 enum { 59 /* various global constants */ 60 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 61 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ 62 ATA_DEF_QUEUE = 1, 63 ATA_MAX_QUEUE = 32, 64 ATA_TAG_INTERNAL = ATA_MAX_QUEUE, 65 ATA_SHORT_PAUSE = 16, 66 67 ATAPI_MAX_DRAIN = 16 << 10, 68 69 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1, 70 71 ATA_SHT_EMULATED = 1, 72 ATA_SHT_THIS_ID = -1, 73 74 /* struct ata_taskfile flags */ 75 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */ 76 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */ 77 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */ 78 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */ 79 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */ 80 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */ 81 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */ 82 83 /* struct ata_device stuff */ 84 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 85 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 86 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 87 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 88 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 89 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 90 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 91 ATA_DFLAG_AN = (1 << 7), /* AN configured */ 92 ATA_DFLAG_TRUSTED = (1 << 8), /* device supports trusted send/recv */ 93 ATA_DFLAG_FUA = (1 << 9), /* device supports FUA */ 94 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */ 95 ATA_DFLAG_NCQ_SEND_RECV = (1 << 11), /* device supports NCQ SEND and RECV */ 96 ATA_DFLAG_NCQ_PRIO = (1 << 12), /* device supports NCQ priority */ 97 ATA_DFLAG_CDL = (1 << 13), /* supports cmd duration limits */ 98 ATA_DFLAG_CFG_MASK = (1 << 14) - 1, 99 100 ATA_DFLAG_PIO = (1 << 14), /* device limited to PIO mode */ 101 ATA_DFLAG_NCQ_OFF = (1 << 15), /* device limited to non-NCQ mode */ 102 ATA_DFLAG_SLEEPING = (1 << 16), /* device is sleeping */ 103 ATA_DFLAG_DUBIOUS_XFER = (1 << 17), /* data transfer not verified */ 104 ATA_DFLAG_NO_UNLOAD = (1 << 18), /* device doesn't support unload */ 105 ATA_DFLAG_UNLOCK_HPA = (1 << 19), /* unlock HPA */ 106 ATA_DFLAG_INIT_MASK = (1 << 20) - 1, 107 108 ATA_DFLAG_NCQ_PRIO_ENABLED = (1 << 20), /* Priority cmds sent to dev */ 109 ATA_DFLAG_CDL_ENABLED = (1 << 21), /* cmd duration limits is enabled */ 110 ATA_DFLAG_DETACH = (1 << 24), 111 ATA_DFLAG_DETACHED = (1 << 25), 112 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */ 113 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */ 114 ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */ 115 ATA_DFLAG_D_SENSE = (1 << 29), /* Descriptor sense requested */ 116 ATA_DFLAG_ZAC = (1 << 30), /* ZAC device */ 117 118 ATA_DFLAG_FEATURES_MASK = (ATA_DFLAG_TRUSTED | ATA_DFLAG_DA | \ 119 ATA_DFLAG_DEVSLP | ATA_DFLAG_NCQ_SEND_RECV | \ 120 ATA_DFLAG_NCQ_PRIO | ATA_DFLAG_FUA | \ 121 ATA_DFLAG_CDL), 122 123 ATA_DEV_UNKNOWN = 0, /* unknown device */ 124 ATA_DEV_ATA = 1, /* ATA device */ 125 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 126 ATA_DEV_ATAPI = 3, /* ATAPI device */ 127 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 128 ATA_DEV_PMP = 5, /* SATA port multiplier */ 129 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 130 ATA_DEV_SEMB = 7, /* SEMB */ 131 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 132 ATA_DEV_ZAC = 9, /* ZAC device */ 133 ATA_DEV_ZAC_UNSUP = 10, /* ZAC device (unsupported) */ 134 ATA_DEV_NONE = 11, /* no device */ 135 136 /* struct ata_link flags */ 137 /* NOTE: struct ata_force_param currently stores lflags in u16 */ 138 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ 139 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ 140 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ 141 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ 142 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 143 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 144 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 145 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */ 146 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */ 147 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */ 148 ATA_LFLAG_CHANGED = (1 << 10), /* LPM state changed on this link */ 149 ATA_LFLAG_NO_DEBOUNCE_DELAY = (1 << 11), /* no debounce delay on link resume */ 150 151 /* struct ata_port flags */ 152 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 153 /* (doesn't imply presence) */ 154 ATA_FLAG_SATA = (1 << 1), 155 ATA_FLAG_NO_LPM = (1 << 2), /* host not happy with LPM */ 156 ATA_FLAG_NO_LOG_PAGE = (1 << 5), /* do not issue log page read */ 157 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 158 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 159 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 160 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 161 * doesn't handle PIO interrupts */ 162 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 163 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ 164 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ 165 ATA_FLAG_DEBUGMSG = (1 << 13), 166 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */ 167 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 168 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 169 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 170 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 171 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 172 ATA_FLAG_FPDMA_AUX = (1 << 20), /* controller supports H2DFIS aux field */ 173 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 174 * management */ 175 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 176 * led */ 177 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */ 178 ATA_FLAG_SAS_HOST = (1 << 24), /* SAS host */ 179 180 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 181 182 183 /* struct ata_port pflags */ 184 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 185 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 186 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 187 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 188 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 189 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 190 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 191 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 192 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 193 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 194 195 ATA_PFLAG_RESUMING = (1 << 16), /* port is being resumed */ 196 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 197 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 198 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 199 200 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 201 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 202 ATA_PFLAG_EXTERNAL = (1 << 22), /* eSATA/external port */ 203 204 /* struct ata_queued_cmd flags */ 205 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 206 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 207 ATA_QCFLAG_RTF_FILLED = (1 << 2), /* result TF has been filled */ 208 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 209 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 210 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 211 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 212 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 213 ATA_QCFLAG_HAS_CDL = (1 << 8), /* qc has CDL a descriptor set */ 214 215 ATA_QCFLAG_EH = (1 << 16), /* cmd aborted and owned by EH */ 216 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 217 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 218 ATA_QCFLAG_EH_SUCCESS_CMD = (1 << 19), /* EH should fetch sense for this successful cmd */ 219 220 /* host set flags */ 221 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 222 ATA_HOST_STARTED = (1 << 1), /* Host started */ 223 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 224 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */ 225 226 ATA_HOST_NO_PART = (1 << 4), /* Host does not support partial */ 227 ATA_HOST_NO_SSC = (1 << 5), /* Host does not support slumber */ 228 ATA_HOST_NO_DEVSLP = (1 << 6), /* Host does not support devslp */ 229 230 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 231 232 /* various lengths of time */ 233 ATA_TMOUT_BOOT = 30000, /* heuristic */ 234 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 235 ATA_TMOUT_INTERNAL_QUICK = 5000, 236 ATA_TMOUT_MAX_PARK = 30000, 237 238 /* 239 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s 240 * is too much without parallel probing. Use 2s if parallel 241 * probing is available, 800ms otherwise. 242 */ 243 ATA_TMOUT_FF_WAIT_LONG = 2000, 244 ATA_TMOUT_FF_WAIT = 800, 245 246 /* Spec mandates to wait for ">= 2ms" before checking status 247 * after reset. We wait 150ms, because that was the magic 248 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 249 * the period of time between when the ATA command register is 250 * written, and then status is checked. Because waiting for 251 * "a while" before checking status is fine, post SRST, we 252 * perform this magic delay here as well. 253 * 254 * Old drivers/ide uses the 2mS rule and then waits for ready. 255 */ 256 ATA_WAIT_AFTER_RESET = 150, 257 258 /* If PMP is supported, we have to do follow-up SRST. As some 259 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 260 * advised to wait only for the following duration before 261 * doing SRST. 262 */ 263 ATA_TMOUT_PMP_SRST_WAIT = 10000, 264 265 /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might 266 * be a spurious PHY event, so ignore the first PHY event that 267 * occurs within 10s after the policy change. 268 */ 269 ATA_TMOUT_SPURIOUS_PHY = 10000, 270 271 /* ATA bus states */ 272 BUS_UNKNOWN = 0, 273 BUS_DMA = 1, 274 BUS_IDLE = 2, 275 BUS_NOINTR = 3, 276 BUS_NODATA = 4, 277 BUS_TIMER = 5, 278 BUS_PIO = 6, 279 BUS_EDD = 7, 280 BUS_IDENTIFY = 8, 281 BUS_PACKET = 9, 282 283 /* SATA port states */ 284 PORT_UNKNOWN = 0, 285 PORT_ENABLED = 1, 286 PORT_DISABLED = 2, 287 288 /* encoding various smaller bitmaps into a single 289 * unsigned int bitmap 290 */ 291 ATA_NR_PIO_MODES = 7, 292 ATA_NR_MWDMA_MODES = 5, 293 ATA_NR_UDMA_MODES = 8, 294 295 ATA_SHIFT_PIO = 0, 296 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 297 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 298 ATA_SHIFT_PRIO = 6, 299 300 ATA_PRIO_HIGH = 2, 301 /* size of buffer to pad xfers ending on unaligned boundaries */ 302 ATA_DMA_PAD_SZ = 4, 303 304 /* ering size */ 305 ATA_ERING_SIZE = 32, 306 307 /* return values for ->qc_defer */ 308 ATA_DEFER_LINK = 1, 309 ATA_DEFER_PORT = 2, 310 311 /* desc_len for ata_eh_info and context */ 312 ATA_EH_DESC_LEN = 80, 313 314 /* reset / recovery action types */ 315 ATA_EH_REVALIDATE = (1 << 0), 316 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 317 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 318 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 319 ATA_EH_ENABLE_LINK = (1 << 3), 320 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 321 ATA_EH_GET_SUCCESS_SENSE = (1 << 6), /* Get sense data for successful cmd */ 322 ATA_EH_SET_ACTIVE = (1 << 7), /* Set a device to active power mode */ 323 324 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK | 325 ATA_EH_GET_SUCCESS_SENSE | ATA_EH_SET_ACTIVE, 326 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 327 ATA_EH_ENABLE_LINK, 328 329 /* ata_eh_info->flags */ 330 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 331 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 332 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 333 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */ 334 335 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 336 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 337 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 338 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 339 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */ 340 341 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 342 343 /* mask of flags to transfer *to* the slave link */ 344 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 345 346 /* max tries if error condition is still set after ->error_handler */ 347 ATA_EH_MAX_TRIES = 5, 348 349 /* sometimes resuming a link requires several retries */ 350 ATA_LINK_RESUME_TRIES = 5, 351 352 /* how hard are we gonna try to probe/recover devices */ 353 ATA_EH_DEV_TRIES = 3, 354 ATA_EH_PMP_TRIES = 5, 355 ATA_EH_PMP_LINK_TRIES = 3, 356 357 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 358 359 /* This should match the actual table size of 360 * ata_eh_cmd_timeout_table in libata-eh.c. 361 */ 362 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 8, 363 364 /* Horkage types. May be set by libata or controller on drives 365 (some horkage may be drive/controller pair dependent */ 366 367 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 368 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 369 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 370 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 371 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 372 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 373 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 374 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 375 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 376 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 377 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 378 not multiple of 16 bytes */ 379 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */ 380 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 381 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ 382 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ 383 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */ 384 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */ 385 ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */ 386 ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19), /* don't use queued TRIM */ 387 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */ 388 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */ 389 ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */ 390 ATA_HORKAGE_NO_DMA_LOG = (1 << 23), /* don't use DMA for log read */ 391 ATA_HORKAGE_NOTRIM = (1 << 24), /* don't use TRIM */ 392 ATA_HORKAGE_MAX_SEC_1024 = (1 << 25), /* Limit max sects to 1024 */ 393 ATA_HORKAGE_MAX_TRIM_128M = (1 << 26), /* Limit max trim size to 128M */ 394 ATA_HORKAGE_NO_NCQ_ON_ATI = (1 << 27), /* Disable NCQ on ATI chipset */ 395 ATA_HORKAGE_NO_ID_DEV_LOG = (1 << 28), /* Identify device log missing */ 396 ATA_HORKAGE_NO_LOG_DIR = (1 << 29), /* Do not read log directory */ 397 ATA_HORKAGE_NO_FUA = (1 << 30), /* Do not use FUA */ 398 399 /* DMA mask for user DMA control: User visible values; DO NOT 400 renumber */ 401 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 402 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 403 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 404 405 /* ATAPI command types */ 406 ATAPI_READ = 0, /* READs */ 407 ATAPI_WRITE = 1, /* WRITEs */ 408 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 409 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 410 ATAPI_MISC = 4, /* the rest */ 411 412 /* Timing constants */ 413 ATA_TIMING_SETUP = (1 << 0), 414 ATA_TIMING_ACT8B = (1 << 1), 415 ATA_TIMING_REC8B = (1 << 2), 416 ATA_TIMING_CYC8B = (1 << 3), 417 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 418 ATA_TIMING_CYC8B, 419 ATA_TIMING_ACTIVE = (1 << 4), 420 ATA_TIMING_RECOVER = (1 << 5), 421 ATA_TIMING_DMACK_HOLD = (1 << 6), 422 ATA_TIMING_CYCLE = (1 << 7), 423 ATA_TIMING_UDMA = (1 << 8), 424 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 425 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 426 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 427 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 428 ATA_TIMING_UDMA, 429 430 /* ACPI constants */ 431 ATA_ACPI_FILTER_SETXFER = 1 << 0, 432 ATA_ACPI_FILTER_LOCK = 1 << 1, 433 ATA_ACPI_FILTER_DIPM = 1 << 2, 434 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 435 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 436 437 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 438 ATA_ACPI_FILTER_LOCK | 439 ATA_ACPI_FILTER_DIPM, 440 }; 441 442 enum ata_xfer_mask { 443 ATA_MASK_PIO = ((1U << ATA_NR_PIO_MODES) - 1) << ATA_SHIFT_PIO, 444 ATA_MASK_MWDMA = ((1U << ATA_NR_MWDMA_MODES) - 1) << ATA_SHIFT_MWDMA, 445 ATA_MASK_UDMA = ((1U << ATA_NR_UDMA_MODES) - 1) << ATA_SHIFT_UDMA, 446 }; 447 448 enum hsm_task_states { 449 HSM_ST_IDLE, /* no command on going */ 450 HSM_ST_FIRST, /* (waiting the device to) 451 write CDB or first data block */ 452 HSM_ST, /* (waiting the device to) transfer data */ 453 HSM_ST_LAST, /* (waiting the device to) complete command */ 454 HSM_ST_ERR, /* error */ 455 }; 456 457 enum ata_completion_errors { 458 AC_ERR_OK = 0, /* no error */ 459 AC_ERR_DEV = (1 << 0), /* device reported error */ 460 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 461 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 462 AC_ERR_MEDIA = (1 << 3), /* media error */ 463 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 464 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 465 AC_ERR_SYSTEM = (1 << 6), /* system error */ 466 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 467 AC_ERR_OTHER = (1 << 8), /* unknown */ 468 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 469 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 470 }; 471 472 /* 473 * Link power management policy: If you alter this, you also need to 474 * alter libata-sata.c (for the ascii descriptions) 475 */ 476 enum ata_lpm_policy { 477 ATA_LPM_UNKNOWN, 478 ATA_LPM_MAX_POWER, 479 ATA_LPM_MED_POWER, 480 ATA_LPM_MED_POWER_WITH_DIPM, /* Med power + DIPM as win IRST does */ 481 ATA_LPM_MIN_POWER_WITH_PARTIAL, /* Min Power + partial and slumber */ 482 ATA_LPM_MIN_POWER, /* Min power + no partial (slumber only) */ 483 }; 484 485 enum ata_lpm_hints { 486 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */ 487 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */ 488 ATA_LPM_WAKE_ONLY = (1 << 2), /* only wake up link */ 489 }; 490 491 /* forward declarations */ 492 struct scsi_device; 493 struct ata_port_operations; 494 struct ata_port; 495 struct ata_link; 496 struct ata_queued_cmd; 497 498 /* typedefs */ 499 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 500 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 501 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 502 unsigned long deadline); 503 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 504 505 extern struct device_attribute dev_attr_unload_heads; 506 #ifdef CONFIG_SATA_HOST 507 extern struct device_attribute dev_attr_link_power_management_policy; 508 extern struct device_attribute dev_attr_ncq_prio_supported; 509 extern struct device_attribute dev_attr_ncq_prio_enable; 510 extern struct device_attribute dev_attr_em_message_type; 511 extern struct device_attribute dev_attr_em_message; 512 extern struct device_attribute dev_attr_sw_activity; 513 #endif 514 515 enum sw_activity { 516 OFF, 517 BLINK_ON, 518 BLINK_OFF, 519 }; 520 521 struct ata_taskfile { 522 unsigned long flags; /* ATA_TFLAG_xxx */ 523 u8 protocol; /* ATA_PROT_xxx */ 524 525 u8 ctl; /* control reg */ 526 527 u8 hob_feature; /* additional data */ 528 u8 hob_nsect; /* to support LBA48 */ 529 u8 hob_lbal; 530 u8 hob_lbam; 531 u8 hob_lbah; 532 533 union { 534 u8 error; 535 u8 feature; 536 }; 537 u8 nsect; 538 u8 lbal; 539 u8 lbam; 540 u8 lbah; 541 542 u8 device; 543 544 union { 545 u8 status; 546 u8 command; 547 }; 548 549 u32 auxiliary; /* auxiliary field */ 550 /* from SATA 3.1 and */ 551 /* ATA-8 ACS-3 */ 552 }; 553 554 #ifdef CONFIG_ATA_SFF 555 struct ata_ioports { 556 void __iomem *cmd_addr; 557 void __iomem *data_addr; 558 void __iomem *error_addr; 559 void __iomem *feature_addr; 560 void __iomem *nsect_addr; 561 void __iomem *lbal_addr; 562 void __iomem *lbam_addr; 563 void __iomem *lbah_addr; 564 void __iomem *device_addr; 565 void __iomem *status_addr; 566 void __iomem *command_addr; 567 void __iomem *altstatus_addr; 568 void __iomem *ctl_addr; 569 #ifdef CONFIG_ATA_BMDMA 570 void __iomem *bmdma_addr; 571 #endif /* CONFIG_ATA_BMDMA */ 572 void __iomem *scr_addr; 573 }; 574 #endif /* CONFIG_ATA_SFF */ 575 576 struct ata_host { 577 spinlock_t lock; 578 struct device *dev; 579 void __iomem * const *iomap; 580 unsigned int n_ports; 581 unsigned int n_tags; /* nr of NCQ tags */ 582 void *private_data; 583 struct ata_port_operations *ops; 584 unsigned long flags; 585 struct kref kref; 586 587 struct mutex eh_mutex; 588 struct task_struct *eh_owner; 589 590 struct ata_port *simplex_claimed; /* channel owning the DMA */ 591 struct ata_port *ports[]; 592 }; 593 594 struct ata_queued_cmd { 595 struct ata_port *ap; 596 struct ata_device *dev; 597 598 struct scsi_cmnd *scsicmd; 599 void (*scsidone)(struct scsi_cmnd *); 600 601 struct ata_taskfile tf; 602 u8 cdb[ATAPI_CDB_LEN]; 603 604 unsigned long flags; /* ATA_QCFLAG_xxx */ 605 unsigned int tag; /* libata core tag */ 606 unsigned int hw_tag; /* driver tag */ 607 unsigned int n_elem; 608 unsigned int orig_n_elem; 609 610 int dma_dir; 611 612 unsigned int sect_size; 613 614 unsigned int nbytes; 615 unsigned int extrabytes; 616 unsigned int curbytes; 617 618 struct scatterlist sgent; 619 620 struct scatterlist *sg; 621 622 struct scatterlist *cursg; 623 unsigned int cursg_ofs; 624 625 unsigned int err_mask; 626 struct ata_taskfile result_tf; 627 ata_qc_cb_t complete_fn; 628 629 void *private_data; 630 void *lldd_task; 631 }; 632 633 struct ata_port_stats { 634 unsigned long unhandled_irq; 635 unsigned long idle_irq; 636 unsigned long rw_reqbuf; 637 }; 638 639 struct ata_ering_entry { 640 unsigned int eflags; 641 unsigned int err_mask; 642 u64 timestamp; 643 }; 644 645 struct ata_ering { 646 int cursor; 647 struct ata_ering_entry ring[ATA_ERING_SIZE]; 648 }; 649 650 struct ata_cpr { 651 u8 num; 652 u8 num_storage_elements; 653 u64 start_lba; 654 u64 num_lbas; 655 }; 656 657 struct ata_cpr_log { 658 u8 nr_cpr; 659 struct ata_cpr cpr[] __counted_by(nr_cpr); 660 }; 661 662 struct ata_device { 663 struct ata_link *link; 664 unsigned int devno; /* 0 or 1 */ 665 unsigned int horkage; /* List of broken features */ 666 unsigned long flags; /* ATA_DFLAG_xxx */ 667 struct scsi_device *sdev; /* attached SCSI device */ 668 void *private_data; 669 #ifdef CONFIG_ATA_ACPI 670 union acpi_object *gtf_cache; 671 unsigned int gtf_filter; 672 #endif 673 #ifdef CONFIG_SATA_ZPODD 674 void *zpodd; 675 #endif 676 struct device tdev; 677 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 678 u64 n_sectors; /* size of device, if ATA */ 679 u64 n_native_sectors; /* native size, if ATA */ 680 unsigned int class; /* ATA_DEV_xxx */ 681 unsigned long unpark_deadline; 682 683 u8 pio_mode; 684 u8 dma_mode; 685 u8 xfer_mode; 686 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 687 688 unsigned int multi_count; /* sectors count for 689 READ/WRITE MULTIPLE */ 690 unsigned int max_sectors; /* per-device max sectors */ 691 unsigned int cdb_len; 692 693 /* per-dev xfer mask */ 694 unsigned int pio_mask; 695 unsigned int mwdma_mask; 696 unsigned int udma_mask; 697 698 /* for CHS addressing */ 699 u16 cylinders; /* Number of cylinders */ 700 u16 heads; /* Number of heads */ 701 u16 sectors; /* Number of sectors per track */ 702 703 union { 704 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 705 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 706 } ____cacheline_aligned; 707 708 /* DEVSLP Timing Variables from Identify Device Data Log */ 709 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE]; 710 711 /* NCQ send and receive log subcommand support */ 712 u8 ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE]; 713 u8 ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_SIZE]; 714 715 /* ZAC zone configuration */ 716 u32 zac_zoned_cap; 717 u32 zac_zones_optimal_open; 718 u32 zac_zones_optimal_nonseq; 719 u32 zac_zones_max_open; 720 721 /* Concurrent positioning ranges */ 722 struct ata_cpr_log *cpr_log; 723 724 /* Command Duration Limits log support */ 725 u8 cdl[ATA_LOG_CDL_SIZE]; 726 727 /* error history */ 728 int spdn_cnt; 729 /* ering is CLEAR_END, read comment above CLEAR_END */ 730 struct ata_ering ering; 731 }; 732 733 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 734 * cleared to zero on ata_dev_init(). 735 */ 736 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 737 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 738 739 struct ata_eh_info { 740 struct ata_device *dev; /* offending device */ 741 u32 serror; /* SError from LLDD */ 742 unsigned int err_mask; /* port-wide err_mask */ 743 unsigned int action; /* ATA_EH_* action mask */ 744 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 745 unsigned int flags; /* ATA_EHI_* flags */ 746 747 unsigned int probe_mask; 748 749 char desc[ATA_EH_DESC_LEN]; 750 int desc_len; 751 }; 752 753 struct ata_eh_context { 754 struct ata_eh_info i; 755 int tries[ATA_MAX_DEVICES]; 756 int cmd_timeout_idx[ATA_MAX_DEVICES] 757 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 758 unsigned int classes[ATA_MAX_DEVICES]; 759 unsigned int did_probe_mask; 760 unsigned int unloaded_mask; 761 unsigned int saved_ncq_enabled; 762 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 763 /* timestamp for the last reset attempt or success */ 764 unsigned long last_reset; 765 }; 766 767 struct ata_acpi_drive 768 { 769 u32 pio; 770 u32 dma; 771 } __packed; 772 773 struct ata_acpi_gtm { 774 struct ata_acpi_drive drive[2]; 775 u32 flags; 776 } __packed; 777 778 struct ata_link { 779 struct ata_port *ap; 780 int pmp; /* port multiplier port # */ 781 782 struct device tdev; 783 unsigned int active_tag; /* active tag on this link */ 784 u32 sactive; /* active NCQ commands */ 785 786 unsigned int flags; /* ATA_LFLAG_xxx */ 787 788 u32 saved_scontrol; /* SControl on probe */ 789 unsigned int hw_sata_spd_limit; 790 unsigned int sata_spd_limit; 791 unsigned int sata_spd; /* current SATA PHY speed */ 792 enum ata_lpm_policy lpm_policy; 793 794 /* record runtime error info, protected by host_set lock */ 795 struct ata_eh_info eh_info; 796 /* EH context */ 797 struct ata_eh_context eh_context; 798 799 struct ata_device device[ATA_MAX_DEVICES]; 800 801 unsigned long last_lpm_change; /* when last LPM change happened */ 802 }; 803 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag) 804 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0]) 805 806 struct ata_port { 807 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 808 struct ata_port_operations *ops; 809 spinlock_t *lock; 810 /* Flags owned by the EH context. Only EH should touch these once the 811 port is active */ 812 unsigned long flags; /* ATA_FLAG_xxx */ 813 /* Flags that change dynamically, protected by ap->lock */ 814 unsigned int pflags; /* ATA_PFLAG_xxx */ 815 unsigned int print_id; /* user visible unique port ID */ 816 unsigned int local_port_no; /* host local port num */ 817 unsigned int port_no; /* 0 based port no. inside the host */ 818 819 #ifdef CONFIG_ATA_SFF 820 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 821 u8 ctl; /* cache of ATA control register */ 822 u8 last_ctl; /* Cache last written value */ 823 struct ata_link* sff_pio_task_link; /* link currently used */ 824 struct delayed_work sff_pio_task; 825 #ifdef CONFIG_ATA_BMDMA 826 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */ 827 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */ 828 #endif /* CONFIG_ATA_BMDMA */ 829 #endif /* CONFIG_ATA_SFF */ 830 831 unsigned int pio_mask; 832 unsigned int mwdma_mask; 833 unsigned int udma_mask; 834 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 835 836 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE + 1]; 837 u64 qc_active; 838 int nr_active_links; /* #links with active qcs */ 839 840 struct ata_link link; /* host default link */ 841 struct ata_link *slave_link; /* see ata_slave_link_init() */ 842 843 int nr_pmp_links; /* nr of available PMP links */ 844 struct ata_link *pmp_link; /* array of PMP links */ 845 struct ata_link *excl_link; /* for PMP qc exclusion */ 846 847 struct ata_port_stats stats; 848 struct ata_host *host; 849 struct device *dev; 850 struct device tdev; 851 852 struct mutex scsi_scan_mutex; 853 struct delayed_work hotplug_task; 854 struct delayed_work scsi_rescan_task; 855 856 unsigned int hsm_task_state; 857 858 struct list_head eh_done_q; 859 wait_queue_head_t eh_wait_q; 860 int eh_tries; 861 struct completion park_req_pending; 862 863 pm_message_t pm_mesg; 864 enum ata_lpm_policy target_lpm_policy; 865 866 struct timer_list fastdrain_timer; 867 unsigned int fastdrain_cnt; 868 869 async_cookie_t cookie; 870 871 int em_message_type; 872 void *private_data; 873 874 #ifdef CONFIG_ATA_ACPI 875 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 876 #endif 877 /* owned by EH */ 878 u8 *ncq_sense_buf; 879 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 880 }; 881 882 /* The following initializer overrides a method to NULL whether one of 883 * its parent has the method defined or not. This is equivalent to 884 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 885 * expression and thus can't be used as an initializer. 886 */ 887 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 888 889 struct ata_port_operations { 890 /* 891 * Command execution 892 */ 893 int (*qc_defer)(struct ata_queued_cmd *qc); 894 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 895 enum ata_completion_errors (*qc_prep)(struct ata_queued_cmd *qc); 896 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 897 void (*qc_fill_rtf)(struct ata_queued_cmd *qc); 898 void (*qc_ncq_fill_rtf)(struct ata_port *ap, u64 done_mask); 899 900 /* 901 * Configuration and exception handling 902 */ 903 int (*cable_detect)(struct ata_port *ap); 904 unsigned int (*mode_filter)(struct ata_device *dev, unsigned int 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, 909 __le16 *id); 910 911 void (*dev_config)(struct ata_device *dev); 912 913 void (*freeze)(struct ata_port *ap); 914 void (*thaw)(struct ata_port *ap); 915 ata_prereset_fn_t prereset; 916 ata_reset_fn_t softreset; 917 ata_reset_fn_t hardreset; 918 ata_postreset_fn_t postreset; 919 ata_prereset_fn_t pmp_prereset; 920 ata_reset_fn_t pmp_softreset; 921 ata_reset_fn_t pmp_hardreset; 922 ata_postreset_fn_t pmp_postreset; 923 void (*error_handler)(struct ata_port *ap); 924 void (*lost_interrupt)(struct ata_port *ap); 925 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 926 void (*sched_eh)(struct ata_port *ap); 927 void (*end_eh)(struct ata_port *ap); 928 929 /* 930 * Optional features 931 */ 932 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 933 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 934 void (*pmp_attach)(struct ata_port *ap); 935 void (*pmp_detach)(struct ata_port *ap); 936 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy, 937 unsigned hints); 938 939 /* 940 * Start, stop, suspend and resume 941 */ 942 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 943 int (*port_resume)(struct ata_port *ap); 944 int (*port_start)(struct ata_port *ap); 945 void (*port_stop)(struct ata_port *ap); 946 void (*host_stop)(struct ata_host *host); 947 948 #ifdef CONFIG_ATA_SFF 949 /* 950 * SFF / taskfile oriented ops 951 */ 952 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 953 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl); 954 u8 (*sff_check_status)(struct ata_port *ap); 955 u8 (*sff_check_altstatus)(struct ata_port *ap); 956 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 957 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 958 void (*sff_exec_command)(struct ata_port *ap, 959 const struct ata_taskfile *tf); 960 unsigned int (*sff_data_xfer)(struct ata_queued_cmd *qc, 961 unsigned char *buf, unsigned int buflen, int rw); 962 void (*sff_irq_on)(struct ata_port *); 963 bool (*sff_irq_check)(struct ata_port *); 964 void (*sff_irq_clear)(struct ata_port *); 965 void (*sff_drain_fifo)(struct ata_queued_cmd *qc); 966 967 #ifdef CONFIG_ATA_BMDMA 968 void (*bmdma_setup)(struct ata_queued_cmd *qc); 969 void (*bmdma_start)(struct ata_queued_cmd *qc); 970 void (*bmdma_stop)(struct ata_queued_cmd *qc); 971 u8 (*bmdma_status)(struct ata_port *ap); 972 #endif /* CONFIG_ATA_BMDMA */ 973 #endif /* CONFIG_ATA_SFF */ 974 975 ssize_t (*em_show)(struct ata_port *ap, char *buf); 976 ssize_t (*em_store)(struct ata_port *ap, const char *message, 977 size_t size); 978 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 979 ssize_t (*sw_activity_store)(struct ata_device *dev, 980 enum sw_activity val); 981 ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state, 982 ssize_t size); 983 984 /* 985 * ->inherits must be the last field and all the preceding 986 * fields must be pointers. 987 */ 988 const struct ata_port_operations *inherits; 989 }; 990 991 struct ata_port_info { 992 unsigned long flags; 993 unsigned long link_flags; 994 unsigned int pio_mask; 995 unsigned int mwdma_mask; 996 unsigned int udma_mask; 997 struct ata_port_operations *port_ops; 998 void *private_data; 999 }; 1000 1001 struct ata_timing { 1002 unsigned short mode; /* ATA mode */ 1003 unsigned short setup; /* t1 */ 1004 unsigned short act8b; /* t2 for 8-bit I/O */ 1005 unsigned short rec8b; /* t2i for 8-bit I/O */ 1006 unsigned short cyc8b; /* t0 for 8-bit I/O */ 1007 unsigned short active; /* t2 or tD */ 1008 unsigned short recover; /* t2i or tK */ 1009 unsigned short dmack_hold; /* tj */ 1010 unsigned short cycle; /* t0 */ 1011 unsigned short udma; /* t2CYCTYP/2 */ 1012 }; 1013 1014 /* 1015 * Core layer - drivers/ata/libata-core.c 1016 */ 1017 extern struct ata_port_operations ata_dummy_port_ops; 1018 extern const struct ata_port_info ata_dummy_port_info; 1019 1020 static inline bool ata_is_atapi(u8 prot) 1021 { 1022 return prot & ATA_PROT_FLAG_ATAPI; 1023 } 1024 1025 static inline bool ata_is_pio(u8 prot) 1026 { 1027 return prot & ATA_PROT_FLAG_PIO; 1028 } 1029 1030 static inline bool ata_is_dma(u8 prot) 1031 { 1032 return prot & ATA_PROT_FLAG_DMA; 1033 } 1034 1035 static inline bool ata_is_ncq(u8 prot) 1036 { 1037 return prot & ATA_PROT_FLAG_NCQ; 1038 } 1039 1040 static inline bool ata_is_data(u8 prot) 1041 { 1042 return prot & (ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA); 1043 } 1044 1045 static inline int is_multi_taskfile(struct ata_taskfile *tf) 1046 { 1047 return (tf->command == ATA_CMD_READ_MULTI) || 1048 (tf->command == ATA_CMD_WRITE_MULTI) || 1049 (tf->command == ATA_CMD_READ_MULTI_EXT) || 1050 (tf->command == ATA_CMD_WRITE_MULTI_EXT) || 1051 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT); 1052 } 1053 1054 static inline int ata_port_is_dummy(struct ata_port *ap) 1055 { 1056 return ap->ops == &ata_dummy_port_ops; 1057 } 1058 1059 static inline bool ata_port_is_frozen(const struct ata_port *ap) 1060 { 1061 return ap->pflags & ATA_PFLAG_FROZEN; 1062 } 1063 1064 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 1065 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 1066 int (*check_ready)(struct ata_link *link)); 1067 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 1068 unsigned long deadline); 1069 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 1070 1071 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 1072 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 1073 const struct ata_port_info * const * ppi, int n_ports); 1074 extern void ata_host_get(struct ata_host *host); 1075 extern void ata_host_put(struct ata_host *host); 1076 extern int ata_host_start(struct ata_host *host); 1077 extern int ata_host_register(struct ata_host *host, 1078 const struct scsi_host_template *sht); 1079 extern int ata_host_activate(struct ata_host *host, int irq, 1080 irq_handler_t irq_handler, unsigned long irq_flags, 1081 const struct scsi_host_template *sht); 1082 extern void ata_host_detach(struct ata_host *host); 1083 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *); 1084 extern int ata_scsi_detect(struct scsi_host_template *sht); 1085 extern int ata_scsi_ioctl(struct scsi_device *dev, unsigned int cmd, 1086 void __user *arg); 1087 #ifdef CONFIG_COMPAT 1088 #define ATA_SCSI_COMPAT_IOCTL .compat_ioctl = ata_scsi_ioctl, 1089 #else 1090 #define ATA_SCSI_COMPAT_IOCTL /* empty */ 1091 #endif 1092 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd); 1093 #if IS_REACHABLE(CONFIG_ATA) 1094 bool ata_scsi_dma_need_drain(struct request *rq); 1095 #else 1096 #define ata_scsi_dma_need_drain NULL 1097 #endif 1098 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 1099 unsigned int cmd, void __user *arg); 1100 extern bool ata_link_online(struct ata_link *link); 1101 extern bool ata_link_offline(struct ata_link *link); 1102 #ifdef CONFIG_PM 1103 extern void ata_host_suspend(struct ata_host *host, pm_message_t mesg); 1104 extern void ata_host_resume(struct ata_host *host); 1105 extern void ata_sas_port_suspend(struct ata_port *ap); 1106 extern void ata_sas_port_resume(struct ata_port *ap); 1107 #else 1108 static inline void ata_sas_port_suspend(struct ata_port *ap) 1109 { 1110 } 1111 static inline void ata_sas_port_resume(struct ata_port *ap) 1112 { 1113 } 1114 #endif 1115 extern int ata_ratelimit(void); 1116 extern void ata_msleep(struct ata_port *ap, unsigned int msecs); 1117 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, 1118 u32 val, unsigned int interval, unsigned int timeout); 1119 extern int atapi_cmd_type(u8 opcode); 1120 extern unsigned int ata_pack_xfermask(unsigned int pio_mask, 1121 unsigned int mwdma_mask, 1122 unsigned int udma_mask); 1123 extern void ata_unpack_xfermask(unsigned int xfer_mask, 1124 unsigned int *pio_mask, 1125 unsigned int *mwdma_mask, 1126 unsigned int *udma_mask); 1127 extern u8 ata_xfer_mask2mode(unsigned int xfer_mask); 1128 extern unsigned int ata_xfer_mode2mask(u8 xfer_mode); 1129 extern int ata_xfer_mode2shift(u8 xfer_mode); 1130 extern const char *ata_mode_string(unsigned int xfer_mask); 1131 extern unsigned int ata_id_xfermask(const u16 *id); 1132 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1133 extern enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc); 1134 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1135 unsigned int n_elem); 1136 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1137 extern unsigned int ata_port_classify(struct ata_port *ap, 1138 const struct ata_taskfile *tf); 1139 extern void ata_dev_disable(struct ata_device *adev); 1140 extern void ata_id_string(const u16 *id, unsigned char *s, 1141 unsigned int ofs, unsigned int len); 1142 extern void ata_id_c_string(const u16 *id, unsigned char *s, 1143 unsigned int ofs, unsigned int len); 1144 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1145 struct ata_taskfile *tf, __le16 *id); 1146 extern void ata_qc_complete(struct ata_queued_cmd *qc); 1147 extern u64 ata_qc_get_active(struct ata_port *ap); 1148 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd); 1149 extern int ata_std_bios_param(struct scsi_device *sdev, 1150 struct block_device *bdev, 1151 sector_t capacity, int geom[]); 1152 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev); 1153 extern int ata_scsi_slave_alloc(struct scsi_device *sdev); 1154 extern int ata_scsi_slave_config(struct scsi_device *sdev); 1155 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1156 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1157 int queue_depth); 1158 extern int ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1159 int queue_depth); 1160 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1161 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1162 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap); 1163 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q); 1164 1165 /* 1166 * SATA specific code - drivers/ata/libata-sata.c 1167 */ 1168 #ifdef CONFIG_SATA_HOST 1169 extern const unsigned int sata_deb_timing_normal[]; 1170 extern const unsigned int sata_deb_timing_hotplug[]; 1171 extern const unsigned int sata_deb_timing_long[]; 1172 1173 static inline const unsigned int * 1174 sata_ehc_deb_timing(struct ata_eh_context *ehc) 1175 { 1176 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 1177 return sata_deb_timing_hotplug; 1178 else 1179 return sata_deb_timing_normal; 1180 } 1181 1182 extern int sata_scr_valid(struct ata_link *link); 1183 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 1184 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 1185 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 1186 extern int sata_set_spd(struct ata_link *link); 1187 extern int sata_link_hardreset(struct ata_link *link, 1188 const unsigned int *timing, unsigned long deadline, 1189 bool *online, int (*check_ready)(struct ata_link *)); 1190 extern int sata_link_resume(struct ata_link *link, const unsigned int *params, 1191 unsigned long deadline); 1192 extern int ata_eh_read_sense_success_ncq_log(struct ata_link *link); 1193 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1194 #else 1195 static inline const unsigned int * 1196 sata_ehc_deb_timing(struct ata_eh_context *ehc) 1197 { 1198 return NULL; 1199 } 1200 static inline int sata_scr_valid(struct ata_link *link) { return 0; } 1201 static inline int sata_scr_read(struct ata_link *link, int reg, u32 *val) 1202 { 1203 return -EOPNOTSUPP; 1204 } 1205 static inline int sata_scr_write(struct ata_link *link, int reg, u32 val) 1206 { 1207 return -EOPNOTSUPP; 1208 } 1209 static inline int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) 1210 { 1211 return -EOPNOTSUPP; 1212 } 1213 static inline int sata_set_spd(struct ata_link *link) { return -EOPNOTSUPP; } 1214 static inline int sata_link_hardreset(struct ata_link *link, 1215 const unsigned int *timing, 1216 unsigned long deadline, 1217 bool *online, 1218 int (*check_ready)(struct ata_link *)) 1219 { 1220 if (online) 1221 *online = false; 1222 return -EOPNOTSUPP; 1223 } 1224 static inline int sata_link_resume(struct ata_link *link, 1225 const unsigned int *params, 1226 unsigned long deadline) 1227 { 1228 return -EOPNOTSUPP; 1229 } 1230 static inline int ata_eh_read_sense_success_ncq_log(struct ata_link *link) 1231 { 1232 return -EOPNOTSUPP; 1233 } 1234 static inline void ata_eh_analyze_ncq_error(struct ata_link *link) { } 1235 #endif 1236 extern int sata_link_debounce(struct ata_link *link, 1237 const unsigned int *params, unsigned long deadline); 1238 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, 1239 bool spm_wakeup); 1240 extern int ata_slave_link_init(struct ata_port *ap); 1241 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 1242 struct ata_port_info *, struct Scsi_Host *); 1243 extern void ata_port_probe(struct ata_port *ap); 1244 extern int ata_sas_tport_add(struct device *parent, struct ata_port *ap); 1245 extern void ata_sas_tport_delete(struct ata_port *ap); 1246 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 1247 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap); 1248 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 1249 u8 pmp, int is_cmd, u8 *fis); 1250 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 1251 extern int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active); 1252 extern bool sata_lpm_ignore_phy_events(struct ata_link *link); 1253 extern int sata_async_notification(struct ata_port *ap); 1254 1255 extern int ata_cable_40wire(struct ata_port *ap); 1256 extern int ata_cable_80wire(struct ata_port *ap); 1257 extern int ata_cable_sata(struct ata_port *ap); 1258 extern int ata_cable_ignore(struct ata_port *ap); 1259 extern int ata_cable_unknown(struct ata_port *ap); 1260 1261 /* Timing helpers */ 1262 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1263 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1264 1265 /* PCI */ 1266 #ifdef CONFIG_PCI 1267 struct pci_dev; 1268 1269 struct pci_bits { 1270 unsigned int reg; /* PCI config register to read */ 1271 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1272 unsigned long mask; 1273 unsigned long val; 1274 }; 1275 1276 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1277 extern void ata_pci_shutdown_one(struct pci_dev *pdev); 1278 extern void ata_pci_remove_one(struct pci_dev *pdev); 1279 1280 #ifdef CONFIG_PM 1281 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1282 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1283 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1284 extern int ata_pci_device_resume(struct pci_dev *pdev); 1285 #endif /* CONFIG_PM */ 1286 #endif /* CONFIG_PCI */ 1287 1288 struct platform_device; 1289 1290 extern void ata_platform_remove_one(struct platform_device *pdev); 1291 1292 /* 1293 * ACPI - drivers/ata/libata-acpi.c 1294 */ 1295 #ifdef CONFIG_ATA_ACPI 1296 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1297 { 1298 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1299 return &ap->__acpi_init_gtm; 1300 return NULL; 1301 } 1302 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1303 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1304 unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1305 const struct ata_acpi_gtm *gtm); 1306 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1307 #else 1308 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1309 { 1310 return NULL; 1311 } 1312 1313 static inline int ata_acpi_stm(const struct ata_port *ap, 1314 struct ata_acpi_gtm *stm) 1315 { 1316 return -ENOSYS; 1317 } 1318 1319 static inline int ata_acpi_gtm(const struct ata_port *ap, 1320 struct ata_acpi_gtm *stm) 1321 { 1322 return -ENOSYS; 1323 } 1324 1325 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1326 const struct ata_acpi_gtm *gtm) 1327 { 1328 return 0; 1329 } 1330 1331 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1332 const struct ata_acpi_gtm *gtm) 1333 { 1334 return 0; 1335 } 1336 #endif 1337 1338 /* 1339 * EH - drivers/ata/libata-eh.c 1340 */ 1341 extern void ata_port_schedule_eh(struct ata_port *ap); 1342 extern void ata_port_wait_eh(struct ata_port *ap); 1343 extern int ata_link_abort(struct ata_link *link); 1344 extern int ata_port_abort(struct ata_port *ap); 1345 extern int ata_port_freeze(struct ata_port *ap); 1346 1347 extern void ata_eh_freeze_port(struct ata_port *ap); 1348 extern void ata_eh_thaw_port(struct ata_port *ap); 1349 1350 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1351 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1352 1353 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1354 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1355 ata_postreset_fn_t postreset); 1356 extern void ata_std_error_handler(struct ata_port *ap); 1357 extern void ata_std_sched_eh(struct ata_port *ap); 1358 extern void ata_std_end_eh(struct ata_port *ap); 1359 extern int ata_link_nr_enabled(struct ata_link *link); 1360 1361 /* 1362 * Base operations to inherit from and initializers for sht 1363 * 1364 * Operations 1365 * 1366 * base : Common to all libata drivers. 1367 * sata : SATA controllers w/ native interface. 1368 * pmp : SATA controllers w/ PMP support. 1369 * sff : SFF ATA controllers w/o BMDMA support. 1370 * bmdma : SFF ATA controllers w/ BMDMA support. 1371 * 1372 * sht initializers 1373 * 1374 * BASE : Common to all libata drivers. The user must set 1375 * sg_tablesize and dma_boundary. 1376 * PIO : SFF ATA controllers w/ only PIO support. 1377 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1378 * dma_boundary are set to BMDMA limits. 1379 * NCQ : SATA controllers supporting NCQ. The user must set 1380 * sg_tablesize, dma_boundary and can_queue. 1381 */ 1382 extern const struct ata_port_operations ata_base_port_ops; 1383 extern const struct ata_port_operations sata_port_ops; 1384 extern const struct attribute_group *ata_common_sdev_groups[]; 1385 1386 /* 1387 * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated 1388 * by the edge drivers. Because the 'module' field of sht must be the 1389 * edge driver's module reference, otherwise the driver can be unloaded 1390 * even if the scsi_device is being accessed. 1391 */ 1392 #define __ATA_BASE_SHT(drv_name) \ 1393 .module = THIS_MODULE, \ 1394 .name = drv_name, \ 1395 .ioctl = ata_scsi_ioctl, \ 1396 ATA_SCSI_COMPAT_IOCTL \ 1397 .queuecommand = ata_scsi_queuecmd, \ 1398 .dma_need_drain = ata_scsi_dma_need_drain, \ 1399 .this_id = ATA_SHT_THIS_ID, \ 1400 .emulated = ATA_SHT_EMULATED, \ 1401 .proc_name = drv_name, \ 1402 .slave_alloc = ata_scsi_slave_alloc, \ 1403 .slave_destroy = ata_scsi_slave_destroy, \ 1404 .bios_param = ata_std_bios_param, \ 1405 .unlock_native_capacity = ata_scsi_unlock_native_capacity,\ 1406 .max_sectors = ATA_MAX_SECTORS_LBA48 1407 1408 #define ATA_SUBBASE_SHT(drv_name) \ 1409 __ATA_BASE_SHT(drv_name), \ 1410 .can_queue = ATA_DEF_QUEUE, \ 1411 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \ 1412 .slave_configure = ata_scsi_slave_config 1413 1414 #define ATA_SUBBASE_SHT_QD(drv_name, drv_qd) \ 1415 __ATA_BASE_SHT(drv_name), \ 1416 .can_queue = drv_qd, \ 1417 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \ 1418 .slave_configure = ata_scsi_slave_config 1419 1420 #define ATA_BASE_SHT(drv_name) \ 1421 ATA_SUBBASE_SHT(drv_name), \ 1422 .sdev_groups = ata_common_sdev_groups 1423 1424 #ifdef CONFIG_SATA_HOST 1425 extern const struct attribute_group *ata_ncq_sdev_groups[]; 1426 1427 #define ATA_NCQ_SHT(drv_name) \ 1428 ATA_SUBBASE_SHT(drv_name), \ 1429 .sdev_groups = ata_ncq_sdev_groups, \ 1430 .change_queue_depth = ata_scsi_change_queue_depth 1431 1432 #define ATA_NCQ_SHT_QD(drv_name, drv_qd) \ 1433 ATA_SUBBASE_SHT_QD(drv_name, drv_qd), \ 1434 .sdev_groups = ata_ncq_sdev_groups, \ 1435 .change_queue_depth = ata_scsi_change_queue_depth 1436 #endif 1437 1438 /* 1439 * PMP helpers 1440 */ 1441 #ifdef CONFIG_SATA_PMP 1442 static inline bool sata_pmp_supported(struct ata_port *ap) 1443 { 1444 return ap->flags & ATA_FLAG_PMP; 1445 } 1446 1447 static inline bool sata_pmp_attached(struct ata_port *ap) 1448 { 1449 return ap->nr_pmp_links != 0; 1450 } 1451 1452 static inline bool ata_is_host_link(const struct ata_link *link) 1453 { 1454 return link == &link->ap->link || link == link->ap->slave_link; 1455 } 1456 #else /* CONFIG_SATA_PMP */ 1457 static inline bool sata_pmp_supported(struct ata_port *ap) 1458 { 1459 return false; 1460 } 1461 1462 static inline bool sata_pmp_attached(struct ata_port *ap) 1463 { 1464 return false; 1465 } 1466 1467 static inline bool ata_is_host_link(const struct ata_link *link) 1468 { 1469 return true; 1470 } 1471 #endif /* CONFIG_SATA_PMP */ 1472 1473 static inline int sata_srst_pmp(struct ata_link *link) 1474 { 1475 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1476 return SATA_PMP_CTRL_PORT; 1477 return link->pmp; 1478 } 1479 1480 #define ata_port_printk(level, ap, fmt, ...) \ 1481 pr_ ## level ("ata%u: " fmt, (ap)->print_id, ##__VA_ARGS__) 1482 1483 #define ata_port_err(ap, fmt, ...) \ 1484 ata_port_printk(err, ap, fmt, ##__VA_ARGS__) 1485 #define ata_port_warn(ap, fmt, ...) \ 1486 ata_port_printk(warn, ap, fmt, ##__VA_ARGS__) 1487 #define ata_port_notice(ap, fmt, ...) \ 1488 ata_port_printk(notice, ap, fmt, ##__VA_ARGS__) 1489 #define ata_port_info(ap, fmt, ...) \ 1490 ata_port_printk(info, ap, fmt, ##__VA_ARGS__) 1491 #define ata_port_dbg(ap, fmt, ...) \ 1492 ata_port_printk(debug, ap, fmt, ##__VA_ARGS__) 1493 1494 #define ata_link_printk(level, link, fmt, ...) \ 1495 do { \ 1496 if (sata_pmp_attached((link)->ap) || \ 1497 (link)->ap->slave_link) \ 1498 pr_ ## level ("ata%u.%02u: " fmt, \ 1499 (link)->ap->print_id, \ 1500 (link)->pmp, \ 1501 ##__VA_ARGS__); \ 1502 else \ 1503 pr_ ## level ("ata%u: " fmt, \ 1504 (link)->ap->print_id, \ 1505 ##__VA_ARGS__); \ 1506 } while (0) 1507 1508 #define ata_link_err(link, fmt, ...) \ 1509 ata_link_printk(err, link, fmt, ##__VA_ARGS__) 1510 #define ata_link_warn(link, fmt, ...) \ 1511 ata_link_printk(warn, link, fmt, ##__VA_ARGS__) 1512 #define ata_link_notice(link, fmt, ...) \ 1513 ata_link_printk(notice, link, fmt, ##__VA_ARGS__) 1514 #define ata_link_info(link, fmt, ...) \ 1515 ata_link_printk(info, link, fmt, ##__VA_ARGS__) 1516 #define ata_link_dbg(link, fmt, ...) \ 1517 ata_link_printk(debug, link, fmt, ##__VA_ARGS__) 1518 1519 #define ata_dev_printk(level, dev, fmt, ...) \ 1520 pr_ ## level("ata%u.%02u: " fmt, \ 1521 (dev)->link->ap->print_id, \ 1522 (dev)->link->pmp + (dev)->devno, \ 1523 ##__VA_ARGS__) 1524 1525 #define ata_dev_err(dev, fmt, ...) \ 1526 ata_dev_printk(err, dev, fmt, ##__VA_ARGS__) 1527 #define ata_dev_warn(dev, fmt, ...) \ 1528 ata_dev_printk(warn, dev, fmt, ##__VA_ARGS__) 1529 #define ata_dev_notice(dev, fmt, ...) \ 1530 ata_dev_printk(notice, dev, fmt, ##__VA_ARGS__) 1531 #define ata_dev_info(dev, fmt, ...) \ 1532 ata_dev_printk(info, dev, fmt, ##__VA_ARGS__) 1533 #define ata_dev_dbg(dev, fmt, ...) \ 1534 ata_dev_printk(debug, dev, fmt, ##__VA_ARGS__) 1535 1536 void ata_print_version(const struct device *dev, const char *version); 1537 1538 /* 1539 * ata_eh_info helpers 1540 */ 1541 extern __printf(2, 3) 1542 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1543 extern __printf(2, 3) 1544 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1545 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1546 1547 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1548 { 1549 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1550 ehi->flags |= ATA_EHI_HOTPLUGGED; 1551 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1552 ehi->err_mask |= AC_ERR_ATA_BUS; 1553 } 1554 1555 /* 1556 * port description helpers 1557 */ 1558 extern __printf(2, 3) 1559 void ata_port_desc(struct ata_port *ap, const char *fmt, ...); 1560 #ifdef CONFIG_PCI 1561 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1562 const char *name); 1563 #endif 1564 static inline void ata_port_desc_misc(struct ata_port *ap, int irq) 1565 { 1566 ata_port_desc(ap, "irq %d", irq); 1567 ata_port_desc(ap, "lpm-pol %d", ap->target_lpm_policy); 1568 } 1569 1570 static inline bool ata_tag_internal(unsigned int tag) 1571 { 1572 return tag == ATA_TAG_INTERNAL; 1573 } 1574 1575 static inline bool ata_tag_valid(unsigned int tag) 1576 { 1577 return tag < ATA_MAX_QUEUE || ata_tag_internal(tag); 1578 } 1579 1580 #define __ata_qc_for_each(ap, qc, tag, max_tag, fn) \ 1581 for ((tag) = 0; (tag) < (max_tag) && \ 1582 ({ qc = fn((ap), (tag)); 1; }); (tag)++) \ 1583 1584 /* 1585 * Internal use only, iterate commands ignoring error handling and 1586 * status of 'qc'. 1587 */ 1588 #define ata_qc_for_each_raw(ap, qc, tag) \ 1589 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, __ata_qc_from_tag) 1590 1591 /* 1592 * Iterate all potential commands that can be queued 1593 */ 1594 #define ata_qc_for_each(ap, qc, tag) \ 1595 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, ata_qc_from_tag) 1596 1597 /* 1598 * Like ata_qc_for_each, but with the internal tag included 1599 */ 1600 #define ata_qc_for_each_with_internal(ap, qc, tag) \ 1601 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE + 1, ata_qc_from_tag) 1602 1603 /* 1604 * device helpers 1605 */ 1606 static inline unsigned int ata_class_enabled(unsigned int class) 1607 { 1608 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1609 class == ATA_DEV_PMP || class == ATA_DEV_SEMB || 1610 class == ATA_DEV_ZAC; 1611 } 1612 1613 static inline unsigned int ata_class_disabled(unsigned int class) 1614 { 1615 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1616 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP || 1617 class == ATA_DEV_ZAC_UNSUP; 1618 } 1619 1620 static inline unsigned int ata_class_absent(unsigned int class) 1621 { 1622 return !ata_class_enabled(class) && !ata_class_disabled(class); 1623 } 1624 1625 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1626 { 1627 return ata_class_enabled(dev->class); 1628 } 1629 1630 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1631 { 1632 return ata_class_disabled(dev->class); 1633 } 1634 1635 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1636 { 1637 return ata_class_absent(dev->class); 1638 } 1639 1640 /* 1641 * link helpers 1642 */ 1643 static inline int ata_link_max_devices(const struct ata_link *link) 1644 { 1645 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1646 return 2; 1647 return 1; 1648 } 1649 1650 static inline int ata_link_active(struct ata_link *link) 1651 { 1652 return ata_tag_valid(link->active_tag) || link->sactive; 1653 } 1654 1655 /* 1656 * Iterators 1657 * 1658 * ATA_LITER_* constants are used to select link iteration mode and 1659 * ATA_DITER_* device iteration mode. 1660 * 1661 * For a custom iteration directly using ata_{link|dev}_next(), if 1662 * @link or @dev, respectively, is NULL, the first element is 1663 * returned. @dev and @link can be any valid device or link and the 1664 * next element according to the iteration mode will be returned. 1665 * After the last element, NULL is returned. 1666 */ 1667 enum ata_link_iter_mode { 1668 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1669 * host link. no slave link */ 1670 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1671 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1672 * slave link still comes after host link */ 1673 }; 1674 1675 enum ata_dev_iter_mode { 1676 ATA_DITER_ENABLED, 1677 ATA_DITER_ENABLED_REVERSE, 1678 ATA_DITER_ALL, 1679 ATA_DITER_ALL_REVERSE, 1680 }; 1681 1682 extern struct ata_link *ata_link_next(struct ata_link *link, 1683 struct ata_port *ap, 1684 enum ata_link_iter_mode mode); 1685 1686 extern struct ata_device *ata_dev_next(struct ata_device *dev, 1687 struct ata_link *link, 1688 enum ata_dev_iter_mode mode); 1689 1690 /* 1691 * Shortcut notation for iterations 1692 * 1693 * ata_for_each_link() iterates over each link of @ap according to 1694 * @mode. @link points to the current link in the loop. @link is 1695 * NULL after loop termination. ata_for_each_dev() works the same way 1696 * except that it iterates over each device of @link. 1697 * 1698 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1699 * specified when using the following shorthand notations. Only the 1700 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1701 * specified. This not only increases brevity but also makes it 1702 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1703 */ 1704 #define ata_for_each_link(link, ap, mode) \ 1705 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1706 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1707 1708 #define ata_for_each_dev(dev, link, mode) \ 1709 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1710 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1711 1712 /** 1713 * ata_ncq_supported - Test whether NCQ is supported 1714 * @dev: ATA device to test 1715 * 1716 * LOCKING: 1717 * spin_lock_irqsave(host lock) 1718 * 1719 * RETURNS: 1720 * true if @dev supports NCQ, false otherwise. 1721 */ 1722 static inline bool ata_ncq_supported(struct ata_device *dev) 1723 { 1724 if (!IS_ENABLED(CONFIG_SATA_HOST)) 1725 return false; 1726 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1727 } 1728 1729 /** 1730 * ata_ncq_enabled - Test whether NCQ is enabled 1731 * @dev: ATA device to test 1732 * 1733 * LOCKING: 1734 * spin_lock_irqsave(host lock) 1735 * 1736 * RETURNS: 1737 * true if NCQ is enabled for @dev, false otherwise. 1738 */ 1739 static inline bool ata_ncq_enabled(struct ata_device *dev) 1740 { 1741 return ata_ncq_supported(dev) && !(dev->flags & ATA_DFLAG_NCQ_OFF); 1742 } 1743 1744 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev) 1745 { 1746 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) && 1747 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] & 1748 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM); 1749 } 1750 1751 static inline bool ata_fpdma_read_log_supported(struct ata_device *dev) 1752 { 1753 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) && 1754 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET] & 1755 ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED); 1756 } 1757 1758 static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev) 1759 { 1760 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) && 1761 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] & 1762 ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED); 1763 } 1764 1765 static inline bool ata_fpdma_zac_mgmt_out_supported(struct ata_device *dev) 1766 { 1767 return (dev->ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OFFSET] & 1768 ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OUT); 1769 } 1770 1771 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1772 { 1773 qc->tf.ctl |= ATA_NIEN; 1774 } 1775 1776 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1777 unsigned int tag) 1778 { 1779 if (ata_tag_valid(tag)) 1780 return &ap->qcmd[tag]; 1781 return NULL; 1782 } 1783 1784 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1785 unsigned int tag) 1786 { 1787 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1788 1789 if (unlikely(!qc)) 1790 return qc; 1791 1792 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1793 ATA_QCFLAG_EH)) == ATA_QCFLAG_ACTIVE) 1794 return qc; 1795 1796 return NULL; 1797 } 1798 1799 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1800 { 1801 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1802 } 1803 1804 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1805 { 1806 memset(tf, 0, sizeof(*tf)); 1807 1808 #ifdef CONFIG_ATA_SFF 1809 tf->ctl = dev->link->ap->ctl; 1810 #else 1811 tf->ctl = ATA_DEVCTL_OBS; 1812 #endif 1813 if (dev->devno == 0) 1814 tf->device = ATA_DEVICE_OBS; 1815 else 1816 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1817 } 1818 1819 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1820 { 1821 qc->dma_dir = DMA_NONE; 1822 qc->sg = NULL; 1823 qc->flags = 0; 1824 qc->cursg = NULL; 1825 qc->cursg_ofs = 0; 1826 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1827 qc->n_elem = 0; 1828 qc->err_mask = 0; 1829 qc->sect_size = ATA_SECT_SIZE; 1830 1831 ata_tf_init(qc->dev, &qc->tf); 1832 1833 /* init result_tf such that it indicates normal completion */ 1834 qc->result_tf.command = ATA_DRDY; 1835 qc->result_tf.feature = 0; 1836 } 1837 1838 static inline int ata_try_flush_cache(const struct ata_device *dev) 1839 { 1840 return ata_id_wcache_enabled(dev->id) || 1841 ata_id_has_flush(dev->id) || 1842 ata_id_has_flush_ext(dev->id); 1843 } 1844 1845 static inline unsigned int ac_err_mask(u8 status) 1846 { 1847 if (status & (ATA_BUSY | ATA_DRQ)) 1848 return AC_ERR_HSM; 1849 if (status & (ATA_ERR | ATA_DF)) 1850 return AC_ERR_DEV; 1851 return 0; 1852 } 1853 1854 static inline unsigned int __ac_err_mask(u8 status) 1855 { 1856 unsigned int mask = ac_err_mask(status); 1857 if (mask == 0) 1858 return AC_ERR_OTHER; 1859 return mask; 1860 } 1861 1862 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1863 { 1864 return *(struct ata_port **)&host->hostdata[0]; 1865 } 1866 1867 static inline int ata_check_ready(u8 status) 1868 { 1869 if (!(status & ATA_BUSY)) 1870 return 1; 1871 1872 /* 0xff indicates either no device or device not ready */ 1873 if (status == 0xff) 1874 return -ENODEV; 1875 1876 return 0; 1877 } 1878 1879 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1880 unsigned int timeout_msecs) 1881 { 1882 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1883 } 1884 1885 /* Don't open code these in drivers as there are traps. Firstly the range may 1886 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1887 > UDMA_0. Dyma ddreigiau */ 1888 1889 static inline bool ata_using_mwdma(struct ata_device *adev) 1890 { 1891 return adev->dma_mode >= XFER_MW_DMA_0 && 1892 adev->dma_mode <= XFER_MW_DMA_4; 1893 } 1894 1895 static inline bool ata_using_udma(struct ata_device *adev) 1896 { 1897 return adev->dma_mode >= XFER_UDMA_0 && 1898 adev->dma_mode <= XFER_UDMA_7; 1899 } 1900 1901 static inline bool ata_dma_enabled(struct ata_device *adev) 1902 { 1903 return adev->dma_mode != 0xFF; 1904 } 1905 1906 /************************************************************************** 1907 * PATA timings - drivers/ata/libata-pata-timings.c 1908 */ 1909 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1910 extern int ata_timing_compute(struct ata_device *, unsigned short, 1911 struct ata_timing *, int, int); 1912 extern void ata_timing_merge(const struct ata_timing *, 1913 const struct ata_timing *, struct ata_timing *, 1914 unsigned int); 1915 1916 /************************************************************************** 1917 * PMP - drivers/ata/libata-pmp.c 1918 */ 1919 #ifdef CONFIG_SATA_PMP 1920 1921 extern const struct ata_port_operations sata_pmp_port_ops; 1922 1923 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1924 extern void sata_pmp_error_handler(struct ata_port *ap); 1925 1926 #else /* CONFIG_SATA_PMP */ 1927 1928 #define sata_pmp_port_ops sata_port_ops 1929 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1930 #define sata_pmp_error_handler ata_std_error_handler 1931 1932 #endif /* CONFIG_SATA_PMP */ 1933 1934 1935 /************************************************************************** 1936 * SFF - drivers/ata/libata-sff.c 1937 */ 1938 #ifdef CONFIG_ATA_SFF 1939 1940 extern const struct ata_port_operations ata_sff_port_ops; 1941 extern const struct ata_port_operations ata_bmdma32_port_ops; 1942 1943 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1944 #define ATA_PIO_SHT(drv_name) \ 1945 ATA_BASE_SHT(drv_name), \ 1946 .sg_tablesize = LIBATA_MAX_PRD, \ 1947 .dma_boundary = ATA_DMA_BOUNDARY 1948 1949 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1950 extern u8 ata_sff_check_status(struct ata_port *ap); 1951 extern void ata_sff_pause(struct ata_port *ap); 1952 extern void ata_sff_dma_pause(struct ata_port *ap); 1953 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1954 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1955 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1956 extern void ata_sff_exec_command(struct ata_port *ap, 1957 const struct ata_taskfile *tf); 1958 extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc, 1959 unsigned char *buf, unsigned int buflen, int rw); 1960 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc, 1961 unsigned char *buf, unsigned int buflen, int rw); 1962 extern void ata_sff_irq_on(struct ata_port *ap); 1963 extern void ata_sff_irq_clear(struct ata_port *ap); 1964 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1965 u8 status, int in_wq); 1966 extern void ata_sff_queue_work(struct work_struct *work); 1967 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork, 1968 unsigned long delay); 1969 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay); 1970 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1971 extern void ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1972 extern unsigned int ata_sff_port_intr(struct ata_port *ap, 1973 struct ata_queued_cmd *qc); 1974 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1975 extern void ata_sff_lost_interrupt(struct ata_port *ap); 1976 extern void ata_sff_freeze(struct ata_port *ap); 1977 extern void ata_sff_thaw(struct ata_port *ap); 1978 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1979 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1980 u8 *r_err); 1981 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1982 unsigned long deadline); 1983 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1984 unsigned long deadline); 1985 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1986 unsigned long deadline); 1987 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1988 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1989 extern void ata_sff_error_handler(struct ata_port *ap); 1990 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1991 #ifdef CONFIG_PCI 1992 extern int ata_pci_sff_init_host(struct ata_host *host); 1993 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1994 const struct ata_port_info * const * ppi, 1995 struct ata_host **r_host); 1996 extern int ata_pci_sff_activate_host(struct ata_host *host, 1997 irq_handler_t irq_handler, 1998 const struct scsi_host_template *sht); 1999 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 2000 const struct ata_port_info * const * ppi, 2001 const struct scsi_host_template *sht, void *host_priv, int hflags); 2002 #endif /* CONFIG_PCI */ 2003 2004 #ifdef CONFIG_ATA_BMDMA 2005 2006 extern const struct ata_port_operations ata_bmdma_port_ops; 2007 2008 #define ATA_BMDMA_SHT(drv_name) \ 2009 ATA_BASE_SHT(drv_name), \ 2010 .sg_tablesize = LIBATA_MAX_PRD, \ 2011 .dma_boundary = ATA_DMA_BOUNDARY 2012 2013 extern enum ata_completion_errors ata_bmdma_qc_prep(struct ata_queued_cmd *qc); 2014 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc); 2015 extern enum ata_completion_errors ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc); 2016 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap, 2017 struct ata_queued_cmd *qc); 2018 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance); 2019 extern void ata_bmdma_error_handler(struct ata_port *ap); 2020 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 2021 extern void ata_bmdma_irq_clear(struct ata_port *ap); 2022 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 2023 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 2024 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 2025 extern u8 ata_bmdma_status(struct ata_port *ap); 2026 extern int ata_bmdma_port_start(struct ata_port *ap); 2027 extern int ata_bmdma_port_start32(struct ata_port *ap); 2028 2029 #ifdef CONFIG_PCI 2030 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 2031 extern void ata_pci_bmdma_init(struct ata_host *host); 2032 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev, 2033 const struct ata_port_info * const * ppi, 2034 struct ata_host **r_host); 2035 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev, 2036 const struct ata_port_info * const * ppi, 2037 const struct scsi_host_template *sht, 2038 void *host_priv, int hflags); 2039 #endif /* CONFIG_PCI */ 2040 #endif /* CONFIG_ATA_BMDMA */ 2041 2042 /** 2043 * ata_sff_busy_wait - Wait for a port status register 2044 * @ap: Port to wait for. 2045 * @bits: bits that must be clear 2046 * @max: number of 10uS waits to perform 2047 * 2048 * Waits up to max*10 microseconds for the selected bits in the port's 2049 * status register to be cleared. 2050 * Returns final value of status register. 2051 * 2052 * LOCKING: 2053 * Inherited from caller. 2054 */ 2055 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 2056 unsigned int max) 2057 { 2058 u8 status; 2059 2060 do { 2061 udelay(10); 2062 status = ap->ops->sff_check_status(ap); 2063 max--; 2064 } while (status != 0xff && (status & bits) && (max > 0)); 2065 2066 return status; 2067 } 2068 2069 /** 2070 * ata_wait_idle - Wait for a port to be idle. 2071 * @ap: Port to wait for. 2072 * 2073 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 2074 * Returns final value of status register. 2075 * 2076 * LOCKING: 2077 * Inherited from caller. 2078 */ 2079 static inline u8 ata_wait_idle(struct ata_port *ap) 2080 { 2081 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 2082 2083 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 2084 ata_port_dbg(ap, "abnormal Status 0x%X\n", status); 2085 2086 return status; 2087 } 2088 #endif /* CONFIG_ATA_SFF */ 2089 2090 #endif /* __LINUX_LIBATA_H__ */ 2091