libata.h revision 25985edcedea6396277003854657b5f3cb31a628
1/* 2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved. 3 * Copyright 2003-2005 Jeff Garzik 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2, or (at your option) 9 * any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; see the file COPYING. If not, write to 18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 19 * 20 * 21 * libata documentation is available via 'make {ps|pdf}docs', 22 * as Documentation/DocBook/libata.* 23 * 24 */ 25 26#ifndef __LINUX_LIBATA_H__ 27#define __LINUX_LIBATA_H__ 28 29#include <linux/delay.h> 30#include <linux/jiffies.h> 31#include <linux/interrupt.h> 32#include <linux/dma-mapping.h> 33#include <linux/scatterlist.h> 34#include <linux/io.h> 35#include <linux/ata.h> 36#include <linux/workqueue.h> 37#include <scsi/scsi_host.h> 38#include <linux/acpi.h> 39#include <linux/cdrom.h> 40#include <linux/sched.h> 41 42/* 43 * Define if arch has non-standard setup. This is a _PCI_ standard 44 * not a legacy or ISA standard. 45 */ 46#ifdef CONFIG_ATA_NONSTANDARD 47#include <asm/libata-portmap.h> 48#else 49#include <asm-generic/libata-portmap.h> 50#endif 51 52/* 53 * compile-time options: to be removed as soon as all the drivers are 54 * converted to the new debugging mechanism 55 */ 56#undef ATA_DEBUG /* debugging output */ 57#undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 58#undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 59#undef ATA_NDEBUG /* define to disable quick runtime checks */ 60 61 62/* note: prints function name for you */ 63#ifdef ATA_DEBUG 64#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) 65#ifdef ATA_VERBOSE_DEBUG 66#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) 67#else 68#define VPRINTK(fmt, args...) 69#endif /* ATA_VERBOSE_DEBUG */ 70#else 71#define DPRINTK(fmt, args...) 72#define VPRINTK(fmt, args...) 73#endif /* ATA_DEBUG */ 74 75#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args) 76 77/* NEW: debug levels */ 78#define HAVE_LIBATA_MSG 1 79 80enum { 81 ATA_MSG_DRV = 0x0001, 82 ATA_MSG_INFO = 0x0002, 83 ATA_MSG_PROBE = 0x0004, 84 ATA_MSG_WARN = 0x0008, 85 ATA_MSG_MALLOC = 0x0010, 86 ATA_MSG_CTL = 0x0020, 87 ATA_MSG_INTR = 0x0040, 88 ATA_MSG_ERR = 0x0080, 89}; 90 91#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 92#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 93#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 94#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 95#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 96#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 97#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 98#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 99 100static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 101{ 102 if (dval < 0 || dval >= (sizeof(u32) * 8)) 103 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 104 if (!dval) 105 return 0; 106 return (1 << dval) - 1; 107} 108 109/* defines only for the constants which don't work well as enums */ 110#define ATA_TAG_POISON 0xfafbfcfdU 111 112enum { 113 /* various global constants */ 114 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 115 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ 116 ATA_DEF_QUEUE = 1, 117 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 118 ATA_MAX_QUEUE = 32, 119 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 120 ATA_SHORT_PAUSE = 16, 121 122 ATAPI_MAX_DRAIN = 16 << 10, 123 124 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1, 125 126 ATA_SHT_EMULATED = 1, 127 ATA_SHT_CMD_PER_LUN = 1, 128 ATA_SHT_THIS_ID = -1, 129 ATA_SHT_USE_CLUSTERING = 1, 130 131 /* struct ata_device stuff */ 132 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 133 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 134 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 135 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 136 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 137 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 138 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 139 ATA_DFLAG_AN = (1 << 7), /* AN configured */ 140 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */ 141 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */ 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_INIT_MASK = (1 << 24) - 1, 152 153 ATA_DFLAG_DETACH = (1 << 24), 154 ATA_DFLAG_DETACHED = (1 << 25), 155 156 ATA_DEV_UNKNOWN = 0, /* unknown device */ 157 ATA_DEV_ATA = 1, /* ATA device */ 158 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 159 ATA_DEV_ATAPI = 3, /* ATAPI device */ 160 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 161 ATA_DEV_PMP = 5, /* SATA port multiplier */ 162 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 163 ATA_DEV_SEMB = 7, /* SEMB */ 164 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 165 ATA_DEV_NONE = 9, /* no device */ 166 167 /* struct ata_link flags */ 168 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ 169 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ 170 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ 171 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ 172 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 173 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 174 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 175 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */ 176 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */ 177 178 /* struct ata_port flags */ 179 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 180 /* (doesn't imply presence) */ 181 ATA_FLAG_SATA = (1 << 1), 182 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 183 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 184 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 185 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 186 * doesn't handle PIO interrupts */ 187 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 188 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ 189 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ 190 ATA_FLAG_DEBUGMSG = (1 << 13), 191 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */ 192 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 193 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 194 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 195 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 196 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 197 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 198 * management */ 199 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 200 * led */ 201 202 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 203 204 205 /* struct ata_port pflags */ 206 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 207 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 208 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 209 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 210 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 211 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 212 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 213 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 214 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 215 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 216 217 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 218 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 219 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 220 221 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 222 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 223 224 /* struct ata_queued_cmd flags */ 225 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 226 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 227 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 228 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 229 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 230 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 231 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 232 233 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 234 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 235 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 236 237 /* host set flags */ 238 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 239 ATA_HOST_STARTED = (1 << 1), /* Host started */ 240 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 241 242 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 243 244 /* various lengths of time */ 245 ATA_TMOUT_BOOT = 30000, /* heuristic */ 246 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 247 ATA_TMOUT_INTERNAL_QUICK = 5000, 248 ATA_TMOUT_MAX_PARK = 30000, 249 250 /* 251 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s 252 * is too much without parallel probing. Use 2s if parallel 253 * probing is available, 800ms otherwise. 254 */ 255 ATA_TMOUT_FF_WAIT_LONG = 2000, 256 ATA_TMOUT_FF_WAIT = 800, 257 258 /* Spec mandates to wait for ">= 2ms" before checking status 259 * after reset. We wait 150ms, because that was the magic 260 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 261 * the period of time between when the ATA command register is 262 * written, and then status is checked. Because waiting for 263 * "a while" before checking status is fine, post SRST, we 264 * perform this magic delay here as well. 265 * 266 * Old drivers/ide uses the 2mS rule and then waits for ready. 267 */ 268 ATA_WAIT_AFTER_RESET = 150, 269 270 /* If PMP is supported, we have to do follow-up SRST. As some 271 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 272 * advised to wait only for the following duration before 273 * doing SRST. 274 */ 275 ATA_TMOUT_PMP_SRST_WAIT = 5000, 276 277 /* ATA bus states */ 278 BUS_UNKNOWN = 0, 279 BUS_DMA = 1, 280 BUS_IDLE = 2, 281 BUS_NOINTR = 3, 282 BUS_NODATA = 4, 283 BUS_TIMER = 5, 284 BUS_PIO = 6, 285 BUS_EDD = 7, 286 BUS_IDENTIFY = 8, 287 BUS_PACKET = 9, 288 289 /* SATA port states */ 290 PORT_UNKNOWN = 0, 291 PORT_ENABLED = 1, 292 PORT_DISABLED = 2, 293 294 /* encoding various smaller bitmaps into a single 295 * unsigned long bitmap 296 */ 297 ATA_NR_PIO_MODES = 7, 298 ATA_NR_MWDMA_MODES = 5, 299 ATA_NR_UDMA_MODES = 8, 300 301 ATA_SHIFT_PIO = 0, 302 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 303 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 304 305 /* size of buffer to pad xfers ending on unaligned boundaries */ 306 ATA_DMA_PAD_SZ = 4, 307 308 /* ering size */ 309 ATA_ERING_SIZE = 32, 310 311 /* return values for ->qc_defer */ 312 ATA_DEFER_LINK = 1, 313 ATA_DEFER_PORT = 2, 314 315 /* desc_len for ata_eh_info and context */ 316 ATA_EH_DESC_LEN = 80, 317 318 /* reset / recovery action types */ 319 ATA_EH_REVALIDATE = (1 << 0), 320 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 321 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 322 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 323 ATA_EH_ENABLE_LINK = (1 << 3), 324 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 325 326 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 327 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 328 ATA_EH_ENABLE_LINK, 329 330 /* ata_eh_info->flags */ 331 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 332 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 333 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 334 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */ 335 336 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 337 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 338 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 339 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 340 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */ 341 342 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 343 344 /* mask of flags to transfer *to* the slave link */ 345 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 346 347 /* max tries if error condition is still set after ->error_handler */ 348 ATA_EH_MAX_TRIES = 5, 349 350 /* sometimes resuming a link requires several retries */ 351 ATA_LINK_RESUME_TRIES = 5, 352 353 /* how hard are we gonna try to probe/recover devices */ 354 ATA_PROBE_MAX_TRIES = 3, 355 ATA_EH_DEV_TRIES = 3, 356 ATA_EH_PMP_TRIES = 5, 357 ATA_EH_PMP_LINK_TRIES = 3, 358 359 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 360 361 /* This should match the actual table size of 362 * ata_eh_cmd_timeout_table in libata-eh.c. 363 */ 364 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6, 365 366 /* Horkage types. May be set by libata or controller on drives 367 (some horkage may be drive/controller pair dependent */ 368 369 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 370 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 371 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 372 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 373 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 374 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 375 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 376 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 377 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 378 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 379 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 380 not multiple of 16 bytes */ 381 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */ 382 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 383 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ 384 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ 385 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */ 386 387 /* DMA mask for user DMA control: User visible values; DO NOT 388 renumber */ 389 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 390 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 391 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 392 393 /* ATAPI command types */ 394 ATAPI_READ = 0, /* READs */ 395 ATAPI_WRITE = 1, /* WRITEs */ 396 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 397 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 398 ATAPI_MISC = 4, /* the rest */ 399 400 /* Timing constants */ 401 ATA_TIMING_SETUP = (1 << 0), 402 ATA_TIMING_ACT8B = (1 << 1), 403 ATA_TIMING_REC8B = (1 << 2), 404 ATA_TIMING_CYC8B = (1 << 3), 405 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 406 ATA_TIMING_CYC8B, 407 ATA_TIMING_ACTIVE = (1 << 4), 408 ATA_TIMING_RECOVER = (1 << 5), 409 ATA_TIMING_DMACK_HOLD = (1 << 6), 410 ATA_TIMING_CYCLE = (1 << 7), 411 ATA_TIMING_UDMA = (1 << 8), 412 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 413 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 414 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 415 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 416 ATA_TIMING_UDMA, 417 418 /* ACPI constants */ 419 ATA_ACPI_FILTER_SETXFER = 1 << 0, 420 ATA_ACPI_FILTER_LOCK = 1 << 1, 421 ATA_ACPI_FILTER_DIPM = 1 << 2, 422 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 423 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 424 425 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 426 ATA_ACPI_FILTER_LOCK | 427 ATA_ACPI_FILTER_DIPM, 428}; 429 430enum ata_xfer_mask { 431 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 432 << ATA_SHIFT_PIO, 433 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 434 << ATA_SHIFT_MWDMA, 435 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 436 << ATA_SHIFT_UDMA, 437}; 438 439enum hsm_task_states { 440 HSM_ST_IDLE, /* no command on going */ 441 HSM_ST_FIRST, /* (waiting the device to) 442 write CDB or first data block */ 443 HSM_ST, /* (waiting the device to) transfer data */ 444 HSM_ST_LAST, /* (waiting the device to) complete command */ 445 HSM_ST_ERR, /* error */ 446}; 447 448enum ata_completion_errors { 449 AC_ERR_DEV = (1 << 0), /* device reported error */ 450 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 451 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 452 AC_ERR_MEDIA = (1 << 3), /* media error */ 453 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 454 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 455 AC_ERR_SYSTEM = (1 << 6), /* system error */ 456 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 457 AC_ERR_OTHER = (1 << 8), /* unknown */ 458 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 459 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 460}; 461 462/* 463 * Link power management policy: If you alter this, you also need to 464 * alter libata-scsi.c (for the ascii descriptions) 465 */ 466enum ata_lpm_policy { 467 ATA_LPM_UNKNOWN, 468 ATA_LPM_MAX_POWER, 469 ATA_LPM_MED_POWER, 470 ATA_LPM_MIN_POWER, 471}; 472 473enum ata_lpm_hints { 474 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */ 475 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */ 476}; 477 478/* forward declarations */ 479struct scsi_device; 480struct ata_port_operations; 481struct ata_port; 482struct ata_link; 483struct ata_queued_cmd; 484 485/* typedefs */ 486typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 487typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 488typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 489 unsigned long deadline); 490typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 491 492extern struct device_attribute dev_attr_link_power_management_policy; 493extern struct device_attribute dev_attr_unload_heads; 494extern struct device_attribute dev_attr_em_message_type; 495extern struct device_attribute dev_attr_em_message; 496extern struct device_attribute dev_attr_sw_activity; 497 498enum sw_activity { 499 OFF, 500 BLINK_ON, 501 BLINK_OFF, 502}; 503 504#ifdef CONFIG_ATA_SFF 505struct ata_ioports { 506 void __iomem *cmd_addr; 507 void __iomem *data_addr; 508 void __iomem *error_addr; 509 void __iomem *feature_addr; 510 void __iomem *nsect_addr; 511 void __iomem *lbal_addr; 512 void __iomem *lbam_addr; 513 void __iomem *lbah_addr; 514 void __iomem *device_addr; 515 void __iomem *status_addr; 516 void __iomem *command_addr; 517 void __iomem *altstatus_addr; 518 void __iomem *ctl_addr; 519#ifdef CONFIG_ATA_BMDMA 520 void __iomem *bmdma_addr; 521#endif /* CONFIG_ATA_BMDMA */ 522 void __iomem *scr_addr; 523}; 524#endif /* CONFIG_ATA_SFF */ 525 526struct ata_host { 527 spinlock_t lock; 528 struct device *dev; 529 void __iomem * const *iomap; 530 unsigned int n_ports; 531 void *private_data; 532 struct ata_port_operations *ops; 533 unsigned long flags; 534 535 struct mutex eh_mutex; 536 struct task_struct *eh_owner; 537 538#ifdef CONFIG_ATA_ACPI 539 acpi_handle acpi_handle; 540#endif 541 struct ata_port *simplex_claimed; /* channel owning the DMA */ 542 struct ata_port *ports[0]; 543}; 544 545struct ata_queued_cmd { 546 struct ata_port *ap; 547 struct ata_device *dev; 548 549 struct scsi_cmnd *scsicmd; 550 void (*scsidone)(struct scsi_cmnd *); 551 552 struct ata_taskfile tf; 553 u8 cdb[ATAPI_CDB_LEN]; 554 555 unsigned long flags; /* ATA_QCFLAG_xxx */ 556 unsigned int tag; 557 unsigned int n_elem; 558 unsigned int orig_n_elem; 559 560 int dma_dir; 561 562 unsigned int sect_size; 563 564 unsigned int nbytes; 565 unsigned int extrabytes; 566 unsigned int curbytes; 567 568 struct scatterlist sgent; 569 570 struct scatterlist *sg; 571 572 struct scatterlist *cursg; 573 unsigned int cursg_ofs; 574 575 unsigned int err_mask; 576 struct ata_taskfile result_tf; 577 ata_qc_cb_t complete_fn; 578 579 void *private_data; 580 void *lldd_task; 581}; 582 583struct ata_port_stats { 584 unsigned long unhandled_irq; 585 unsigned long idle_irq; 586 unsigned long rw_reqbuf; 587}; 588 589struct ata_ering_entry { 590 unsigned int eflags; 591 unsigned int err_mask; 592 u64 timestamp; 593}; 594 595struct ata_ering { 596 int cursor; 597 struct ata_ering_entry ring[ATA_ERING_SIZE]; 598}; 599 600struct ata_device { 601 struct ata_link *link; 602 unsigned int devno; /* 0 or 1 */ 603 unsigned int horkage; /* List of broken features */ 604 unsigned long flags; /* ATA_DFLAG_xxx */ 605 struct scsi_device *sdev; /* attached SCSI device */ 606 void *private_data; 607#ifdef CONFIG_ATA_ACPI 608 acpi_handle acpi_handle; 609 union acpi_object *gtf_cache; 610 unsigned int gtf_filter; 611#endif 612 struct device tdev; 613 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 614 u64 n_sectors; /* size of device, if ATA */ 615 u64 n_native_sectors; /* native size, if ATA */ 616 unsigned int class; /* ATA_DEV_xxx */ 617 unsigned long unpark_deadline; 618 619 u8 pio_mode; 620 u8 dma_mode; 621 u8 xfer_mode; 622 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 623 624 unsigned int multi_count; /* sectors count for 625 READ/WRITE MULTIPLE */ 626 unsigned int max_sectors; /* per-device max sectors */ 627 unsigned int cdb_len; 628 629 /* per-dev xfer mask */ 630 unsigned long pio_mask; 631 unsigned long mwdma_mask; 632 unsigned long udma_mask; 633 634 /* for CHS addressing */ 635 u16 cylinders; /* Number of cylinders */ 636 u16 heads; /* Number of heads */ 637 u16 sectors; /* Number of sectors per track */ 638 639 union { 640 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 641 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 642 }; 643 644 /* error history */ 645 int spdn_cnt; 646 /* ering is CLEAR_END, read comment above CLEAR_END */ 647 struct ata_ering ering; 648}; 649 650/* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 651 * cleared to zero on ata_dev_init(). 652 */ 653#define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 654#define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 655 656struct ata_eh_info { 657 struct ata_device *dev; /* offending device */ 658 u32 serror; /* SError from LLDD */ 659 unsigned int err_mask; /* port-wide err_mask */ 660 unsigned int action; /* ATA_EH_* action mask */ 661 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 662 unsigned int flags; /* ATA_EHI_* flags */ 663 664 unsigned int probe_mask; 665 666 char desc[ATA_EH_DESC_LEN]; 667 int desc_len; 668}; 669 670struct ata_eh_context { 671 struct ata_eh_info i; 672 int tries[ATA_MAX_DEVICES]; 673 int cmd_timeout_idx[ATA_MAX_DEVICES] 674 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 675 unsigned int classes[ATA_MAX_DEVICES]; 676 unsigned int did_probe_mask; 677 unsigned int unloaded_mask; 678 unsigned int saved_ncq_enabled; 679 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 680 /* timestamp for the last reset attempt or success */ 681 unsigned long last_reset; 682}; 683 684struct ata_acpi_drive 685{ 686 u32 pio; 687 u32 dma; 688} __packed; 689 690struct ata_acpi_gtm { 691 struct ata_acpi_drive drive[2]; 692 u32 flags; 693} __packed; 694 695struct ata_link { 696 struct ata_port *ap; 697 int pmp; /* port multiplier port # */ 698 699 struct device tdev; 700 unsigned int active_tag; /* active tag on this link */ 701 u32 sactive; /* active NCQ commands */ 702 703 unsigned int flags; /* ATA_LFLAG_xxx */ 704 705 u32 saved_scontrol; /* SControl on probe */ 706 unsigned int hw_sata_spd_limit; 707 unsigned int sata_spd_limit; 708 unsigned int sata_spd; /* current SATA PHY speed */ 709 enum ata_lpm_policy lpm_policy; 710 711 /* record runtime error info, protected by host_set lock */ 712 struct ata_eh_info eh_info; 713 /* EH context */ 714 struct ata_eh_context eh_context; 715 716 struct ata_device device[ATA_MAX_DEVICES]; 717}; 718#define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag) 719#define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0]) 720 721struct ata_port { 722 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 723 struct ata_port_operations *ops; 724 spinlock_t *lock; 725 /* Flags owned by the EH context. Only EH should touch these once the 726 port is active */ 727 unsigned long flags; /* ATA_FLAG_xxx */ 728 /* Flags that change dynamically, protected by ap->lock */ 729 unsigned int pflags; /* ATA_PFLAG_xxx */ 730 unsigned int print_id; /* user visible unique port ID */ 731 unsigned int port_no; /* 0 based port no. inside the host */ 732 733#ifdef CONFIG_ATA_SFF 734 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 735 u8 ctl; /* cache of ATA control register */ 736 u8 last_ctl; /* Cache last written value */ 737 struct ata_link* sff_pio_task_link; /* link currently used */ 738 struct delayed_work sff_pio_task; 739#ifdef CONFIG_ATA_BMDMA 740 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */ 741 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */ 742#endif /* CONFIG_ATA_BMDMA */ 743#endif /* CONFIG_ATA_SFF */ 744 745 unsigned int pio_mask; 746 unsigned int mwdma_mask; 747 unsigned int udma_mask; 748 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 749 750 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 751 unsigned long qc_allocated; 752 unsigned int qc_active; 753 int nr_active_links; /* #links with active qcs */ 754 755 struct ata_link link; /* host default link */ 756 struct ata_link *slave_link; /* see ata_slave_link_init() */ 757 758 int nr_pmp_links; /* nr of available PMP links */ 759 struct ata_link *pmp_link; /* array of PMP links */ 760 struct ata_link *excl_link; /* for PMP qc exclusion */ 761 762 struct ata_port_stats stats; 763 struct ata_host *host; 764 struct device *dev; 765 struct device tdev; 766 767 struct mutex scsi_scan_mutex; 768 struct delayed_work hotplug_task; 769 struct work_struct scsi_rescan_task; 770 771 unsigned int hsm_task_state; 772 773 u32 msg_enable; 774 struct list_head eh_done_q; 775 wait_queue_head_t eh_wait_q; 776 int eh_tries; 777 struct completion park_req_pending; 778 779 pm_message_t pm_mesg; 780 int *pm_result; 781 enum ata_lpm_policy target_lpm_policy; 782 783 struct timer_list fastdrain_timer; 784 unsigned long fastdrain_cnt; 785 786 int em_message_type; 787 void *private_data; 788 789#ifdef CONFIG_ATA_ACPI 790 acpi_handle acpi_handle; 791 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 792#endif 793 /* owned by EH */ 794 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 795}; 796 797/* The following initializer overrides a method to NULL whether one of 798 * its parent has the method defined or not. This is equivalent to 799 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 800 * expression and thus can't be used as an initializer. 801 */ 802#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 803 804struct ata_port_operations { 805 /* 806 * Command execution 807 */ 808 int (*qc_defer)(struct ata_queued_cmd *qc); 809 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 810 void (*qc_prep)(struct ata_queued_cmd *qc); 811 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 812 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 813 814 /* 815 * Configuration and exception handling 816 */ 817 int (*cable_detect)(struct ata_port *ap); 818 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 819 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 820 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 821 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 822 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 823 824 void (*dev_config)(struct ata_device *dev); 825 826 void (*freeze)(struct ata_port *ap); 827 void (*thaw)(struct ata_port *ap); 828 ata_prereset_fn_t prereset; 829 ata_reset_fn_t softreset; 830 ata_reset_fn_t hardreset; 831 ata_postreset_fn_t postreset; 832 ata_prereset_fn_t pmp_prereset; 833 ata_reset_fn_t pmp_softreset; 834 ata_reset_fn_t pmp_hardreset; 835 ata_postreset_fn_t pmp_postreset; 836 void (*error_handler)(struct ata_port *ap); 837 void (*lost_interrupt)(struct ata_port *ap); 838 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 839 840 /* 841 * Optional features 842 */ 843 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 844 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 845 void (*pmp_attach)(struct ata_port *ap); 846 void (*pmp_detach)(struct ata_port *ap); 847 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy, 848 unsigned hints); 849 850 /* 851 * Start, stop, suspend and resume 852 */ 853 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 854 int (*port_resume)(struct ata_port *ap); 855 int (*port_start)(struct ata_port *ap); 856 void (*port_stop)(struct ata_port *ap); 857 void (*host_stop)(struct ata_host *host); 858 859#ifdef CONFIG_ATA_SFF 860 /* 861 * SFF / taskfile oriented ops 862 */ 863 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 864 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl); 865 u8 (*sff_check_status)(struct ata_port *ap); 866 u8 (*sff_check_altstatus)(struct ata_port *ap); 867 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 868 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 869 void (*sff_exec_command)(struct ata_port *ap, 870 const struct ata_taskfile *tf); 871 unsigned int (*sff_data_xfer)(struct ata_device *dev, 872 unsigned char *buf, unsigned int buflen, int rw); 873 void (*sff_irq_on)(struct ata_port *); 874 bool (*sff_irq_check)(struct ata_port *); 875 void (*sff_irq_clear)(struct ata_port *); 876 void (*sff_drain_fifo)(struct ata_queued_cmd *qc); 877 878#ifdef CONFIG_ATA_BMDMA 879 void (*bmdma_setup)(struct ata_queued_cmd *qc); 880 void (*bmdma_start)(struct ata_queued_cmd *qc); 881 void (*bmdma_stop)(struct ata_queued_cmd *qc); 882 u8 (*bmdma_status)(struct ata_port *ap); 883#endif /* CONFIG_ATA_BMDMA */ 884#endif /* CONFIG_ATA_SFF */ 885 886 ssize_t (*em_show)(struct ata_port *ap, char *buf); 887 ssize_t (*em_store)(struct ata_port *ap, const char *message, 888 size_t size); 889 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 890 ssize_t (*sw_activity_store)(struct ata_device *dev, 891 enum sw_activity val); 892 /* 893 * Obsolete 894 */ 895 void (*phy_reset)(struct ata_port *ap); 896 void (*eng_timeout)(struct ata_port *ap); 897 898 /* 899 * ->inherits must be the last field and all the preceding 900 * fields must be pointers. 901 */ 902 const struct ata_port_operations *inherits; 903}; 904 905struct ata_port_info { 906 unsigned long flags; 907 unsigned long link_flags; 908 unsigned long pio_mask; 909 unsigned long mwdma_mask; 910 unsigned long udma_mask; 911 struct ata_port_operations *port_ops; 912 void *private_data; 913}; 914 915struct ata_timing { 916 unsigned short mode; /* ATA mode */ 917 unsigned short setup; /* t1 */ 918 unsigned short act8b; /* t2 for 8-bit I/O */ 919 unsigned short rec8b; /* t2i for 8-bit I/O */ 920 unsigned short cyc8b; /* t0 for 8-bit I/O */ 921 unsigned short active; /* t2 or tD */ 922 unsigned short recover; /* t2i or tK */ 923 unsigned short dmack_hold; /* tj */ 924 unsigned short cycle; /* t0 */ 925 unsigned short udma; /* t2CYCTYP/2 */ 926}; 927 928/* 929 * Core layer - drivers/ata/libata-core.c 930 */ 931extern const unsigned long sata_deb_timing_normal[]; 932extern const unsigned long sata_deb_timing_hotplug[]; 933extern const unsigned long sata_deb_timing_long[]; 934 935extern struct ata_port_operations ata_dummy_port_ops; 936extern const struct ata_port_info ata_dummy_port_info; 937 938static inline const unsigned long * 939sata_ehc_deb_timing(struct ata_eh_context *ehc) 940{ 941 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 942 return sata_deb_timing_hotplug; 943 else 944 return sata_deb_timing_normal; 945} 946 947static inline int ata_port_is_dummy(struct ata_port *ap) 948{ 949 return ap->ops == &ata_dummy_port_ops; 950} 951 952extern int sata_set_spd(struct ata_link *link); 953extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 954extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 955 int (*check_ready)(struct ata_link *link)); 956extern int sata_link_debounce(struct ata_link *link, 957 const unsigned long *params, unsigned long deadline); 958extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 959 unsigned long deadline); 960extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, 961 bool spm_wakeup); 962extern int sata_link_hardreset(struct ata_link *link, 963 const unsigned long *timing, unsigned long deadline, 964 bool *online, int (*check_ready)(struct ata_link *)); 965extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 966 unsigned long deadline); 967extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 968 969extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 970extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 971 const struct ata_port_info * const * ppi, int n_ports); 972extern int ata_slave_link_init(struct ata_port *ap); 973extern int ata_host_start(struct ata_host *host); 974extern int ata_host_register(struct ata_host *host, 975 struct scsi_host_template *sht); 976extern int ata_host_activate(struct ata_host *host, int irq, 977 irq_handler_t irq_handler, unsigned long irq_flags, 978 struct scsi_host_template *sht); 979extern void ata_host_detach(struct ata_host *host); 980extern void ata_host_init(struct ata_host *, struct device *, 981 unsigned long, struct ata_port_operations *); 982extern int ata_scsi_detect(struct scsi_host_template *sht); 983extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 984extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd); 985extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 986 int cmd, void __user *arg); 987extern void ata_sas_port_destroy(struct ata_port *); 988extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 989 struct ata_port_info *, struct Scsi_Host *); 990extern int ata_sas_port_init(struct ata_port *); 991extern int ata_sas_port_start(struct ata_port *ap); 992extern void ata_sas_port_stop(struct ata_port *ap); 993extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 994extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap); 995extern int sata_scr_valid(struct ata_link *link); 996extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 997extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 998extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 999extern bool ata_link_online(struct ata_link *link); 1000extern bool ata_link_offline(struct ata_link *link); 1001#ifdef CONFIG_PM 1002extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 1003extern void ata_host_resume(struct ata_host *host); 1004#endif 1005extern int ata_ratelimit(void); 1006extern void ata_msleep(struct ata_port *ap, unsigned int msecs); 1007extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, 1008 u32 val, unsigned long interval, unsigned long timeout); 1009extern int atapi_cmd_type(u8 opcode); 1010extern void ata_tf_to_fis(const struct ata_taskfile *tf, 1011 u8 pmp, int is_cmd, u8 *fis); 1012extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 1013extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 1014 unsigned long mwdma_mask, unsigned long udma_mask); 1015extern void ata_unpack_xfermask(unsigned long xfer_mask, 1016 unsigned long *pio_mask, unsigned long *mwdma_mask, 1017 unsigned long *udma_mask); 1018extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 1019extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 1020extern int ata_xfer_mode2shift(unsigned long xfer_mode); 1021extern const char *ata_mode_string(unsigned long xfer_mask); 1022extern unsigned long ata_id_xfermask(const u16 *id); 1023extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1024extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 1025extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1026 unsigned int n_elem); 1027extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1028extern void ata_dev_disable(struct ata_device *adev); 1029extern void ata_id_string(const u16 *id, unsigned char *s, 1030 unsigned int ofs, unsigned int len); 1031extern void ata_id_c_string(const u16 *id, unsigned char *s, 1032 unsigned int ofs, unsigned int len); 1033extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1034 struct ata_taskfile *tf, u16 *id); 1035extern void ata_qc_complete(struct ata_queued_cmd *qc); 1036extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 1037extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd); 1038extern int ata_std_bios_param(struct scsi_device *sdev, 1039 struct block_device *bdev, 1040 sector_t capacity, int geom[]); 1041extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev); 1042extern int ata_scsi_slave_config(struct scsi_device *sdev); 1043extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1044extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1045 int queue_depth, int reason); 1046extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1047extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1048extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap); 1049extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q); 1050 1051extern int ata_cable_40wire(struct ata_port *ap); 1052extern int ata_cable_80wire(struct ata_port *ap); 1053extern int ata_cable_sata(struct ata_port *ap); 1054extern int ata_cable_ignore(struct ata_port *ap); 1055extern int ata_cable_unknown(struct ata_port *ap); 1056 1057/* Timing helpers */ 1058extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1059extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1060extern int ata_timing_compute(struct ata_device *, unsigned short, 1061 struct ata_timing *, int, int); 1062extern void ata_timing_merge(const struct ata_timing *, 1063 const struct ata_timing *, struct ata_timing *, 1064 unsigned int); 1065extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1066 1067/* PCI */ 1068#ifdef CONFIG_PCI 1069struct pci_dev; 1070 1071struct pci_bits { 1072 unsigned int reg; /* PCI config register to read */ 1073 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1074 unsigned long mask; 1075 unsigned long val; 1076}; 1077 1078extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1079extern void ata_pci_remove_one(struct pci_dev *pdev); 1080 1081#ifdef CONFIG_PM 1082extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1083extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1084extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1085extern int ata_pci_device_resume(struct pci_dev *pdev); 1086#endif /* CONFIG_PM */ 1087#endif /* CONFIG_PCI */ 1088 1089/* 1090 * ACPI - drivers/ata/libata-acpi.c 1091 */ 1092#ifdef CONFIG_ATA_ACPI 1093static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1094{ 1095 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1096 return &ap->__acpi_init_gtm; 1097 return NULL; 1098} 1099int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1100int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1101unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1102 const struct ata_acpi_gtm *gtm); 1103int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1104#else 1105static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1106{ 1107 return NULL; 1108} 1109 1110static inline int ata_acpi_stm(const struct ata_port *ap, 1111 struct ata_acpi_gtm *stm) 1112{ 1113 return -ENOSYS; 1114} 1115 1116static inline int ata_acpi_gtm(const struct ata_port *ap, 1117 struct ata_acpi_gtm *stm) 1118{ 1119 return -ENOSYS; 1120} 1121 1122static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1123 const struct ata_acpi_gtm *gtm) 1124{ 1125 return 0; 1126} 1127 1128static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1129 const struct ata_acpi_gtm *gtm) 1130{ 1131 return 0; 1132} 1133#endif 1134 1135/* 1136 * EH - drivers/ata/libata-eh.c 1137 */ 1138extern void ata_port_schedule_eh(struct ata_port *ap); 1139extern int ata_link_abort(struct ata_link *link); 1140extern int ata_port_abort(struct ata_port *ap); 1141extern int ata_port_freeze(struct ata_port *ap); 1142extern int sata_async_notification(struct ata_port *ap); 1143 1144extern void ata_eh_freeze_port(struct ata_port *ap); 1145extern void ata_eh_thaw_port(struct ata_port *ap); 1146 1147extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1148extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1149extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1150 1151extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1152 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1153 ata_postreset_fn_t postreset); 1154extern void ata_std_error_handler(struct ata_port *ap); 1155 1156/* 1157 * Base operations to inherit from and initializers for sht 1158 * 1159 * Operations 1160 * 1161 * base : Common to all libata drivers. 1162 * sata : SATA controllers w/ native interface. 1163 * pmp : SATA controllers w/ PMP support. 1164 * sff : SFF ATA controllers w/o BMDMA support. 1165 * bmdma : SFF ATA controllers w/ BMDMA support. 1166 * 1167 * sht initializers 1168 * 1169 * BASE : Common to all libata drivers. The user must set 1170 * sg_tablesize and dma_boundary. 1171 * PIO : SFF ATA controllers w/ only PIO support. 1172 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1173 * dma_boundary are set to BMDMA limits. 1174 * NCQ : SATA controllers supporting NCQ. The user must set 1175 * sg_tablesize, dma_boundary and can_queue. 1176 */ 1177extern const struct ata_port_operations ata_base_port_ops; 1178extern const struct ata_port_operations sata_port_ops; 1179extern struct device_attribute *ata_common_sdev_attrs[]; 1180 1181#define ATA_BASE_SHT(drv_name) \ 1182 .module = THIS_MODULE, \ 1183 .name = drv_name, \ 1184 .ioctl = ata_scsi_ioctl, \ 1185 .queuecommand = ata_scsi_queuecmd, \ 1186 .can_queue = ATA_DEF_QUEUE, \ 1187 .this_id = ATA_SHT_THIS_ID, \ 1188 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1189 .emulated = ATA_SHT_EMULATED, \ 1190 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1191 .proc_name = drv_name, \ 1192 .slave_configure = ata_scsi_slave_config, \ 1193 .slave_destroy = ata_scsi_slave_destroy, \ 1194 .bios_param = ata_std_bios_param, \ 1195 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \ 1196 .sdev_attrs = ata_common_sdev_attrs 1197 1198#define ATA_NCQ_SHT(drv_name) \ 1199 ATA_BASE_SHT(drv_name), \ 1200 .change_queue_depth = ata_scsi_change_queue_depth 1201 1202/* 1203 * PMP helpers 1204 */ 1205#ifdef CONFIG_SATA_PMP 1206static inline bool sata_pmp_supported(struct ata_port *ap) 1207{ 1208 return ap->flags & ATA_FLAG_PMP; 1209} 1210 1211static inline bool sata_pmp_attached(struct ata_port *ap) 1212{ 1213 return ap->nr_pmp_links != 0; 1214} 1215 1216static inline int ata_is_host_link(const struct ata_link *link) 1217{ 1218 return link == &link->ap->link || link == link->ap->slave_link; 1219} 1220#else /* CONFIG_SATA_PMP */ 1221static inline bool sata_pmp_supported(struct ata_port *ap) 1222{ 1223 return false; 1224} 1225 1226static inline bool sata_pmp_attached(struct ata_port *ap) 1227{ 1228 return false; 1229} 1230 1231static inline int ata_is_host_link(const struct ata_link *link) 1232{ 1233 return 1; 1234} 1235#endif /* CONFIG_SATA_PMP */ 1236 1237static inline int sata_srst_pmp(struct ata_link *link) 1238{ 1239 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1240 return SATA_PMP_CTRL_PORT; 1241 return link->pmp; 1242} 1243 1244/* 1245 * printk helpers 1246 */ 1247#define ata_port_printk(ap, lv, fmt, args...) \ 1248 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1249 1250#define ata_link_printk(link, lv, fmt, args...) do { \ 1251 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1252 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1253 (link)->pmp , ##args); \ 1254 else \ 1255 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1256 } while(0) 1257 1258#define ata_dev_printk(dev, lv, fmt, args...) \ 1259 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1260 (dev)->link->pmp + (dev)->devno , ##args) 1261 1262/* 1263 * ata_eh_info helpers 1264 */ 1265extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1266 __attribute__ ((format (printf, 2, 3))); 1267extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1268 __attribute__ ((format (printf, 2, 3))); 1269extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1270 1271static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1272{ 1273 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1274 ehi->flags |= ATA_EHI_HOTPLUGGED; 1275 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1276 ehi->err_mask |= AC_ERR_ATA_BUS; 1277} 1278 1279/* 1280 * port description helpers 1281 */ 1282extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1283 __attribute__ ((format (printf, 2, 3))); 1284#ifdef CONFIG_PCI 1285extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1286 const char *name); 1287#endif 1288 1289static inline unsigned int ata_tag_valid(unsigned int tag) 1290{ 1291 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1292} 1293 1294static inline unsigned int ata_tag_internal(unsigned int tag) 1295{ 1296 return tag == ATA_TAG_INTERNAL; 1297} 1298 1299/* 1300 * device helpers 1301 */ 1302static inline unsigned int ata_class_enabled(unsigned int class) 1303{ 1304 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1305 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1306} 1307 1308static inline unsigned int ata_class_disabled(unsigned int class) 1309{ 1310 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1311 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1312} 1313 1314static inline unsigned int ata_class_absent(unsigned int class) 1315{ 1316 return !ata_class_enabled(class) && !ata_class_disabled(class); 1317} 1318 1319static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1320{ 1321 return ata_class_enabled(dev->class); 1322} 1323 1324static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1325{ 1326 return ata_class_disabled(dev->class); 1327} 1328 1329static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1330{ 1331 return ata_class_absent(dev->class); 1332} 1333 1334/* 1335 * link helpers 1336 */ 1337static inline int ata_link_max_devices(const struct ata_link *link) 1338{ 1339 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1340 return 2; 1341 return 1; 1342} 1343 1344static inline int ata_link_active(struct ata_link *link) 1345{ 1346 return ata_tag_valid(link->active_tag) || link->sactive; 1347} 1348 1349/* 1350 * Iterators 1351 * 1352 * ATA_LITER_* constants are used to select link iteration mode and 1353 * ATA_DITER_* device iteration mode. 1354 * 1355 * For a custom iteration directly using ata_{link|dev}_next(), if 1356 * @link or @dev, respectively, is NULL, the first element is 1357 * returned. @dev and @link can be any valid device or link and the 1358 * next element according to the iteration mode will be returned. 1359 * After the last element, NULL is returned. 1360 */ 1361enum ata_link_iter_mode { 1362 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1363 * host link. no slave link */ 1364 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1365 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1366 * slave link still comes after host link */ 1367}; 1368 1369enum ata_dev_iter_mode { 1370 ATA_DITER_ENABLED, 1371 ATA_DITER_ENABLED_REVERSE, 1372 ATA_DITER_ALL, 1373 ATA_DITER_ALL_REVERSE, 1374}; 1375 1376extern struct ata_link *ata_link_next(struct ata_link *link, 1377 struct ata_port *ap, 1378 enum ata_link_iter_mode mode); 1379 1380extern struct ata_device *ata_dev_next(struct ata_device *dev, 1381 struct ata_link *link, 1382 enum ata_dev_iter_mode mode); 1383 1384/* 1385 * Shortcut notation for iterations 1386 * 1387 * ata_for_each_link() iterates over each link of @ap according to 1388 * @mode. @link points to the current link in the loop. @link is 1389 * NULL after loop termination. ata_for_each_dev() works the same way 1390 * except that it iterates over each device of @link. 1391 * 1392 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1393 * specified when using the following shorthand notations. Only the 1394 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1395 * specified. This not only increases brevity but also makes it 1396 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1397 */ 1398#define ata_for_each_link(link, ap, mode) \ 1399 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1400 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1401 1402#define ata_for_each_dev(dev, link, mode) \ 1403 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1404 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1405 1406/** 1407 * ata_ncq_enabled - Test whether NCQ is enabled 1408 * @dev: ATA device to test for 1409 * 1410 * LOCKING: 1411 * spin_lock_irqsave(host lock) 1412 * 1413 * RETURNS: 1414 * 1 if NCQ is enabled for @dev, 0 otherwise. 1415 */ 1416static inline int ata_ncq_enabled(struct ata_device *dev) 1417{ 1418 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1419 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1420} 1421 1422static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1423{ 1424 qc->tf.ctl |= ATA_NIEN; 1425} 1426 1427static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1428 unsigned int tag) 1429{ 1430 if (likely(ata_tag_valid(tag))) 1431 return &ap->qcmd[tag]; 1432 return NULL; 1433} 1434 1435static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1436 unsigned int tag) 1437{ 1438 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1439 1440 if (unlikely(!qc) || !ap->ops->error_handler) 1441 return qc; 1442 1443 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1444 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1445 return qc; 1446 1447 return NULL; 1448} 1449 1450static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1451{ 1452 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1453} 1454 1455static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1456{ 1457 memset(tf, 0, sizeof(*tf)); 1458 1459#ifdef CONFIG_ATA_SFF 1460 tf->ctl = dev->link->ap->ctl; 1461#else 1462 tf->ctl = ATA_DEVCTL_OBS; 1463#endif 1464 if (dev->devno == 0) 1465 tf->device = ATA_DEVICE_OBS; 1466 else 1467 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1468} 1469 1470static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1471{ 1472 qc->dma_dir = DMA_NONE; 1473 qc->sg = NULL; 1474 qc->flags = 0; 1475 qc->cursg = NULL; 1476 qc->cursg_ofs = 0; 1477 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1478 qc->n_elem = 0; 1479 qc->err_mask = 0; 1480 qc->sect_size = ATA_SECT_SIZE; 1481 1482 ata_tf_init(qc->dev, &qc->tf); 1483 1484 /* init result_tf such that it indicates normal completion */ 1485 qc->result_tf.command = ATA_DRDY; 1486 qc->result_tf.feature = 0; 1487} 1488 1489static inline int ata_try_flush_cache(const struct ata_device *dev) 1490{ 1491 return ata_id_wcache_enabled(dev->id) || 1492 ata_id_has_flush(dev->id) || 1493 ata_id_has_flush_ext(dev->id); 1494} 1495 1496static inline unsigned int ac_err_mask(u8 status) 1497{ 1498 if (status & (ATA_BUSY | ATA_DRQ)) 1499 return AC_ERR_HSM; 1500 if (status & (ATA_ERR | ATA_DF)) 1501 return AC_ERR_DEV; 1502 return 0; 1503} 1504 1505static inline unsigned int __ac_err_mask(u8 status) 1506{ 1507 unsigned int mask = ac_err_mask(status); 1508 if (mask == 0) 1509 return AC_ERR_OTHER; 1510 return mask; 1511} 1512 1513static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1514{ 1515 return *(struct ata_port **)&host->hostdata[0]; 1516} 1517 1518static inline int ata_check_ready(u8 status) 1519{ 1520 if (!(status & ATA_BUSY)) 1521 return 1; 1522 1523 /* 0xff indicates either no device or device not ready */ 1524 if (status == 0xff) 1525 return -ENODEV; 1526 1527 return 0; 1528} 1529 1530static inline unsigned long ata_deadline(unsigned long from_jiffies, 1531 unsigned long timeout_msecs) 1532{ 1533 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1534} 1535 1536/* Don't open code these in drivers as there are traps. Firstly the range may 1537 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1538 > UDMA_0. Dyma ddreigiau */ 1539 1540static inline int ata_using_mwdma(struct ata_device *adev) 1541{ 1542 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1543 return 1; 1544 return 0; 1545} 1546 1547static inline int ata_using_udma(struct ata_device *adev) 1548{ 1549 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1550 return 1; 1551 return 0; 1552} 1553 1554static inline int ata_dma_enabled(struct ata_device *adev) 1555{ 1556 return (adev->dma_mode == 0xFF ? 0 : 1); 1557} 1558 1559/************************************************************************** 1560 * PMP - drivers/ata/libata-pmp.c 1561 */ 1562#ifdef CONFIG_SATA_PMP 1563 1564extern const struct ata_port_operations sata_pmp_port_ops; 1565 1566extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1567extern void sata_pmp_error_handler(struct ata_port *ap); 1568 1569#else /* CONFIG_SATA_PMP */ 1570 1571#define sata_pmp_port_ops sata_port_ops 1572#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1573#define sata_pmp_error_handler ata_std_error_handler 1574 1575#endif /* CONFIG_SATA_PMP */ 1576 1577 1578/************************************************************************** 1579 * SFF - drivers/ata/libata-sff.c 1580 */ 1581#ifdef CONFIG_ATA_SFF 1582 1583extern const struct ata_port_operations ata_sff_port_ops; 1584extern const struct ata_port_operations ata_bmdma32_port_ops; 1585 1586/* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1587#define ATA_PIO_SHT(drv_name) \ 1588 ATA_BASE_SHT(drv_name), \ 1589 .sg_tablesize = LIBATA_MAX_PRD, \ 1590 .dma_boundary = ATA_DMA_BOUNDARY 1591 1592extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1593extern u8 ata_sff_check_status(struct ata_port *ap); 1594extern void ata_sff_pause(struct ata_port *ap); 1595extern void ata_sff_dma_pause(struct ata_port *ap); 1596extern int ata_sff_busy_sleep(struct ata_port *ap, 1597 unsigned long timeout_pat, unsigned long timeout); 1598extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1599extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1600extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1601extern void ata_sff_exec_command(struct ata_port *ap, 1602 const struct ata_taskfile *tf); 1603extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1604 unsigned char *buf, unsigned int buflen, int rw); 1605extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1606 unsigned char *buf, unsigned int buflen, int rw); 1607extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1608 unsigned char *buf, unsigned int buflen, int rw); 1609extern void ata_sff_irq_on(struct ata_port *ap); 1610extern void ata_sff_irq_clear(struct ata_port *ap); 1611extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1612 u8 status, int in_wq); 1613extern void ata_sff_queue_work(struct work_struct *work); 1614extern void ata_sff_queue_delayed_work(struct delayed_work *dwork, 1615 unsigned long delay); 1616extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay); 1617extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1618extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1619extern unsigned int ata_sff_port_intr(struct ata_port *ap, 1620 struct ata_queued_cmd *qc); 1621extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1622extern void ata_sff_lost_interrupt(struct ata_port *ap); 1623extern void ata_sff_freeze(struct ata_port *ap); 1624extern void ata_sff_thaw(struct ata_port *ap); 1625extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1626extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1627 u8 *r_err); 1628extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1629 unsigned long deadline); 1630extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1631 unsigned long deadline); 1632extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1633 unsigned long deadline); 1634extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1635extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1636extern void ata_sff_error_handler(struct ata_port *ap); 1637extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1638#ifdef CONFIG_PCI 1639extern int ata_pci_sff_init_host(struct ata_host *host); 1640extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1641 const struct ata_port_info * const * ppi, 1642 struct ata_host **r_host); 1643extern int ata_pci_sff_activate_host(struct ata_host *host, 1644 irq_handler_t irq_handler, 1645 struct scsi_host_template *sht); 1646extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1647 const struct ata_port_info * const * ppi, 1648 struct scsi_host_template *sht, void *host_priv, int hflags); 1649#endif /* CONFIG_PCI */ 1650 1651#ifdef CONFIG_ATA_BMDMA 1652 1653extern const struct ata_port_operations ata_bmdma_port_ops; 1654 1655#define ATA_BMDMA_SHT(drv_name) \ 1656 ATA_BASE_SHT(drv_name), \ 1657 .sg_tablesize = LIBATA_MAX_PRD, \ 1658 .dma_boundary = ATA_DMA_BOUNDARY 1659 1660extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc); 1661extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc); 1662extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc); 1663extern unsigned int ata_bmdma_port_intr(struct ata_port *ap, 1664 struct ata_queued_cmd *qc); 1665extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance); 1666extern void ata_bmdma_error_handler(struct ata_port *ap); 1667extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 1668extern void ata_bmdma_irq_clear(struct ata_port *ap); 1669extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1670extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1671extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1672extern u8 ata_bmdma_status(struct ata_port *ap); 1673extern int ata_bmdma_port_start(struct ata_port *ap); 1674extern int ata_bmdma_port_start32(struct ata_port *ap); 1675 1676#ifdef CONFIG_PCI 1677extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1678extern void ata_pci_bmdma_init(struct ata_host *host); 1679extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev, 1680 const struct ata_port_info * const * ppi, 1681 struct ata_host **r_host); 1682extern int ata_pci_bmdma_init_one(struct pci_dev *pdev, 1683 const struct ata_port_info * const * ppi, 1684 struct scsi_host_template *sht, 1685 void *host_priv, int hflags); 1686#endif /* CONFIG_PCI */ 1687#endif /* CONFIG_ATA_BMDMA */ 1688 1689/** 1690 * ata_sff_busy_wait - Wait for a port status register 1691 * @ap: Port to wait for. 1692 * @bits: bits that must be clear 1693 * @max: number of 10uS waits to perform 1694 * 1695 * Waits up to max*10 microseconds for the selected bits in the port's 1696 * status register to be cleared. 1697 * Returns final value of status register. 1698 * 1699 * LOCKING: 1700 * Inherited from caller. 1701 */ 1702static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1703 unsigned int max) 1704{ 1705 u8 status; 1706 1707 do { 1708 udelay(10); 1709 status = ap->ops->sff_check_status(ap); 1710 max--; 1711 } while (status != 0xff && (status & bits) && (max > 0)); 1712 1713 return status; 1714} 1715 1716/** 1717 * ata_wait_idle - Wait for a port to be idle. 1718 * @ap: Port to wait for. 1719 * 1720 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1721 * Returns final value of status register. 1722 * 1723 * LOCKING: 1724 * Inherited from caller. 1725 */ 1726static inline u8 ata_wait_idle(struct ata_port *ap) 1727{ 1728 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1729 1730#ifdef ATA_DEBUG 1731 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1732 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1733 status); 1734#endif 1735 1736 return status; 1737} 1738#endif /* CONFIG_ATA_SFF */ 1739 1740#endif /* __LINUX_LIBATA_H__ */ 1741