libata.h revision c93b263e0d4fa8ce5fec0142a98196d1a127e845
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 41/* 42 * Define if arch has non-standard setup. This is a _PCI_ standard 43 * not a legacy or ISA standard. 44 */ 45#ifdef CONFIG_ATA_NONSTANDARD 46#include <asm/libata-portmap.h> 47#else 48#include <asm-generic/libata-portmap.h> 49#endif 50 51/* 52 * compile-time options: to be removed as soon as all the drivers are 53 * converted to the new debugging mechanism 54 */ 55#undef ATA_DEBUG /* debugging output */ 56#undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 57#undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 58#undef ATA_NDEBUG /* define to disable quick runtime checks */ 59 60 61/* note: prints function name for you */ 62#ifdef ATA_DEBUG 63#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) 64#ifdef ATA_VERBOSE_DEBUG 65#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) 66#else 67#define VPRINTK(fmt, args...) 68#endif /* ATA_VERBOSE_DEBUG */ 69#else 70#define DPRINTK(fmt, args...) 71#define VPRINTK(fmt, args...) 72#endif /* ATA_DEBUG */ 73 74#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args) 75 76/* NEW: debug levels */ 77#define HAVE_LIBATA_MSG 1 78 79enum { 80 ATA_MSG_DRV = 0x0001, 81 ATA_MSG_INFO = 0x0002, 82 ATA_MSG_PROBE = 0x0004, 83 ATA_MSG_WARN = 0x0008, 84 ATA_MSG_MALLOC = 0x0010, 85 ATA_MSG_CTL = 0x0020, 86 ATA_MSG_INTR = 0x0040, 87 ATA_MSG_ERR = 0x0080, 88}; 89 90#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 91#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 92#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 93#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 94#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 95#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 96#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 97#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 98 99static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 100{ 101 if (dval < 0 || dval >= (sizeof(u32) * 8)) 102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 103 if (!dval) 104 return 0; 105 return (1 << dval) - 1; 106} 107 108/* defines only for the constants which don't work well as enums */ 109#define ATA_TAG_POISON 0xfafbfcfdU 110 111enum { 112 /* various global constants */ 113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ 115 ATA_DEF_QUEUE = 1, 116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 117 ATA_MAX_QUEUE = 32, 118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 119 ATA_SHORT_PAUSE = 16, 120 121 ATAPI_MAX_DRAIN = 16 << 10, 122 123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1, 124 125 ATA_SHT_EMULATED = 1, 126 ATA_SHT_CMD_PER_LUN = 1, 127 ATA_SHT_THIS_ID = -1, 128 ATA_SHT_USE_CLUSTERING = 1, 129 130 /* struct ata_device stuff */ 131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 138 ATA_DFLAG_AN = (1 << 7), /* AN configured */ 139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */ 140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */ 141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */ 142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1, 143 144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */ 145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */ 146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */ 147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */ 148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */ 149 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */ 150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1, 151 152 ATA_DFLAG_DETACH = (1 << 24), 153 ATA_DFLAG_DETACHED = (1 << 25), 154 155 ATA_DEV_UNKNOWN = 0, /* unknown device */ 156 ATA_DEV_ATA = 1, /* ATA device */ 157 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 158 ATA_DEV_ATAPI = 3, /* ATAPI device */ 159 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 160 ATA_DEV_PMP = 5, /* SATA port multiplier */ 161 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 162 ATA_DEV_SEMB = 7, /* SEMB */ 163 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 164 ATA_DEV_NONE = 9, /* no device */ 165 166 /* struct ata_link flags */ 167 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ 168 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ 169 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ 170 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ 171 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 174 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */ 175 176 /* struct ata_port flags */ 177 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 178 /* (doesn't imply presence) */ 179 ATA_FLAG_SATA = (1 << 1), 180 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 181 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 182 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 183 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 184 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 185 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 186 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 187 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 188 * doesn't handle PIO interrupts */ 189 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 190 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ 191 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ 192 ATA_FLAG_DEBUGMSG = (1 << 13), 193 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */ 194 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 195 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 196 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 197 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 198 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 199 ATA_FLAG_LPM = (1 << 20), /* driver can handle LPM */ 200 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 201 * management */ 202 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 203 * led */ 204 205 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 206 207 208 /* struct ata_port pflags */ 209 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 210 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 211 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 212 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 213 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 214 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 215 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 216 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 217 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 218 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 219 220 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 221 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 222 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 223 224 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 225 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 226 227 /* struct ata_queued_cmd flags */ 228 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 229 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 230 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 231 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 232 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 233 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 234 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 235 236 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 237 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 238 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 239 240 /* host set flags */ 241 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 242 ATA_HOST_STARTED = (1 << 1), /* Host started */ 243 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 244 245 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 246 247 /* various lengths of time */ 248 ATA_TMOUT_BOOT = 30000, /* heuristic */ 249 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 250 ATA_TMOUT_INTERNAL_QUICK = 5000, 251 ATA_TMOUT_MAX_PARK = 30000, 252 253 /* 254 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s 255 * is too much without parallel probing. Use 2s if parallel 256 * probing is available, 800ms otherwise. 257 */ 258 ATA_TMOUT_FF_WAIT_LONG = 2000, 259 ATA_TMOUT_FF_WAIT = 800, 260 261 /* Spec mandates to wait for ">= 2ms" before checking status 262 * after reset. We wait 150ms, because that was the magic 263 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 264 * the period of time between when the ATA command register is 265 * written, and then status is checked. Because waiting for 266 * "a while" before checking status is fine, post SRST, we 267 * perform this magic delay here as well. 268 * 269 * Old drivers/ide uses the 2mS rule and then waits for ready. 270 */ 271 ATA_WAIT_AFTER_RESET = 150, 272 273 /* If PMP is supported, we have to do follow-up SRST. As some 274 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 275 * advised to wait only for the following duration before 276 * doing SRST. 277 */ 278 ATA_TMOUT_PMP_SRST_WAIT = 5000, 279 280 /* ATA bus states */ 281 BUS_UNKNOWN = 0, 282 BUS_DMA = 1, 283 BUS_IDLE = 2, 284 BUS_NOINTR = 3, 285 BUS_NODATA = 4, 286 BUS_TIMER = 5, 287 BUS_PIO = 6, 288 BUS_EDD = 7, 289 BUS_IDENTIFY = 8, 290 BUS_PACKET = 9, 291 292 /* SATA port states */ 293 PORT_UNKNOWN = 0, 294 PORT_ENABLED = 1, 295 PORT_DISABLED = 2, 296 297 /* encoding various smaller bitmaps into a single 298 * unsigned long bitmap 299 */ 300 ATA_NR_PIO_MODES = 7, 301 ATA_NR_MWDMA_MODES = 5, 302 ATA_NR_UDMA_MODES = 8, 303 304 ATA_SHIFT_PIO = 0, 305 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 306 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 307 308 /* size of buffer to pad xfers ending on unaligned boundaries */ 309 ATA_DMA_PAD_SZ = 4, 310 311 /* ering size */ 312 ATA_ERING_SIZE = 32, 313 314 /* return values for ->qc_defer */ 315 ATA_DEFER_LINK = 1, 316 ATA_DEFER_PORT = 2, 317 318 /* desc_len for ata_eh_info and context */ 319 ATA_EH_DESC_LEN = 80, 320 321 /* reset / recovery action types */ 322 ATA_EH_REVALIDATE = (1 << 0), 323 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 324 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 325 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 326 ATA_EH_ENABLE_LINK = (1 << 3), 327 ATA_EH_LPM = (1 << 4), /* link power management action */ 328 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 329 330 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 331 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 332 ATA_EH_ENABLE_LINK | ATA_EH_LPM, 333 334 /* ata_eh_info->flags */ 335 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 336 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 337 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 338 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */ 339 340 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 341 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 342 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 343 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 344 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 345 346 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 347 348 /* mask of flags to transfer *to* the slave link */ 349 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 350 351 /* max tries if error condition is still set after ->error_handler */ 352 ATA_EH_MAX_TRIES = 5, 353 354 /* sometimes resuming a link requires several retries */ 355 ATA_LINK_RESUME_TRIES = 5, 356 357 /* how hard are we gonna try to probe/recover devices */ 358 ATA_PROBE_MAX_TRIES = 3, 359 ATA_EH_DEV_TRIES = 3, 360 ATA_EH_PMP_TRIES = 5, 361 ATA_EH_PMP_LINK_TRIES = 3, 362 363 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 364 365 /* This should match the actual table size of 366 * ata_eh_cmd_timeout_table in libata-eh.c. 367 */ 368 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6, 369 370 /* Horkage types. May be set by libata or controller on drives 371 (some horkage may be drive/controller pair dependant */ 372 373 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 374 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 375 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 376 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 377 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 378 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 379 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 380 ATA_HORKAGE_LPM = (1 << 7), /* Link PM problems */ 381 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 382 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 383 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 384 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 385 not multiple of 16 bytes */ 386 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */ 387 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 388 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ 389 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ 390 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */ 391 392 /* DMA mask for user DMA control: User visible values; DO NOT 393 renumber */ 394 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 395 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 396 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 397 398 /* ATAPI command types */ 399 ATAPI_READ = 0, /* READs */ 400 ATAPI_WRITE = 1, /* WRITEs */ 401 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 402 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 403 ATAPI_MISC = 4, /* the rest */ 404 405 /* Timing constants */ 406 ATA_TIMING_SETUP = (1 << 0), 407 ATA_TIMING_ACT8B = (1 << 1), 408 ATA_TIMING_REC8B = (1 << 2), 409 ATA_TIMING_CYC8B = (1 << 3), 410 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 411 ATA_TIMING_CYC8B, 412 ATA_TIMING_ACTIVE = (1 << 4), 413 ATA_TIMING_RECOVER = (1 << 5), 414 ATA_TIMING_DMACK_HOLD = (1 << 6), 415 ATA_TIMING_CYCLE = (1 << 7), 416 ATA_TIMING_UDMA = (1 << 8), 417 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 418 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 419 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 420 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 421 ATA_TIMING_UDMA, 422 423 /* ACPI constants */ 424 ATA_ACPI_FILTER_SETXFER = 1 << 0, 425 ATA_ACPI_FILTER_LOCK = 1 << 1, 426 ATA_ACPI_FILTER_DIPM = 1 << 2, 427 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 428 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 429 430 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 431 ATA_ACPI_FILTER_LOCK | 432 ATA_ACPI_FILTER_DIPM, 433}; 434 435enum ata_xfer_mask { 436 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 437 << ATA_SHIFT_PIO, 438 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 439 << ATA_SHIFT_MWDMA, 440 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 441 << ATA_SHIFT_UDMA, 442}; 443 444enum hsm_task_states { 445 HSM_ST_IDLE, /* no command on going */ 446 HSM_ST_FIRST, /* (waiting the device to) 447 write CDB or first data block */ 448 HSM_ST, /* (waiting the device to) transfer data */ 449 HSM_ST_LAST, /* (waiting the device to) complete command */ 450 HSM_ST_ERR, /* error */ 451}; 452 453enum ata_completion_errors { 454 AC_ERR_DEV = (1 << 0), /* device reported error */ 455 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 456 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 457 AC_ERR_MEDIA = (1 << 3), /* media error */ 458 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 459 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 460 AC_ERR_SYSTEM = (1 << 6), /* system error */ 461 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 462 AC_ERR_OTHER = (1 << 8), /* unknown */ 463 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 464 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 465}; 466 467/* 468 * Link power management policy: If you alter this, you also need to 469 * alter libata-scsi.c (for the ascii descriptions) 470 */ 471enum ata_lpm_policy { 472 ATA_LPM_UNKNOWN, 473 ATA_LPM_MAX_POWER, 474 ATA_LPM_MED_POWER, 475 ATA_LPM_MIN_POWER, 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#ifdef CONFIG_ATA_ACPI 535 acpi_handle acpi_handle; 536#endif 537 struct ata_port *simplex_claimed; /* channel owning the DMA */ 538 struct ata_port *ports[0]; 539}; 540 541struct ata_queued_cmd { 542 struct ata_port *ap; 543 struct ata_device *dev; 544 545 struct scsi_cmnd *scsicmd; 546 void (*scsidone)(struct scsi_cmnd *); 547 548 struct ata_taskfile tf; 549 u8 cdb[ATAPI_CDB_LEN]; 550 551 unsigned long flags; /* ATA_QCFLAG_xxx */ 552 unsigned int tag; 553 unsigned int n_elem; 554 unsigned int orig_n_elem; 555 556 int dma_dir; 557 558 unsigned int sect_size; 559 560 unsigned int nbytes; 561 unsigned int extrabytes; 562 unsigned int curbytes; 563 564 struct scatterlist *cursg; 565 unsigned int cursg_ofs; 566 567 struct scatterlist sgent; 568 569 struct scatterlist *sg; 570 571 unsigned int err_mask; 572 struct ata_taskfile result_tf; 573 ata_qc_cb_t complete_fn; 574 575 void *private_data; 576 void *lldd_task; 577}; 578 579struct ata_port_stats { 580 unsigned long unhandled_irq; 581 unsigned long idle_irq; 582 unsigned long rw_reqbuf; 583}; 584 585struct ata_ering_entry { 586 unsigned int eflags; 587 unsigned int err_mask; 588 u64 timestamp; 589}; 590 591struct ata_ering { 592 int cursor; 593 struct ata_ering_entry ring[ATA_ERING_SIZE]; 594}; 595 596struct ata_device { 597 struct ata_link *link; 598 unsigned int devno; /* 0 or 1 */ 599 unsigned int horkage; /* List of broken features */ 600 unsigned long flags; /* ATA_DFLAG_xxx */ 601 struct scsi_device *sdev; /* attached SCSI device */ 602 void *private_data; 603#ifdef CONFIG_ATA_ACPI 604 acpi_handle acpi_handle; 605 union acpi_object *gtf_cache; 606 unsigned int gtf_filter; 607#endif 608 struct device tdev; 609 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 610 u64 n_sectors; /* size of device, if ATA */ 611 u64 n_native_sectors; /* native size, if ATA */ 612 unsigned int class; /* ATA_DEV_xxx */ 613 unsigned long unpark_deadline; 614 615 u8 pio_mode; 616 u8 dma_mode; 617 u8 xfer_mode; 618 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 619 620 unsigned int multi_count; /* sectors count for 621 READ/WRITE MULTIPLE */ 622 unsigned int max_sectors; /* per-device max sectors */ 623 unsigned int cdb_len; 624 625 /* per-dev xfer mask */ 626 unsigned long pio_mask; 627 unsigned long mwdma_mask; 628 unsigned long udma_mask; 629 630 /* for CHS addressing */ 631 u16 cylinders; /* Number of cylinders */ 632 u16 heads; /* Number of heads */ 633 u16 sectors; /* Number of sectors per track */ 634 635 union { 636 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 637 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 638 }; 639 640 /* error history */ 641 int spdn_cnt; 642 /* ering is CLEAR_END, read comment above CLEAR_END */ 643 struct ata_ering ering; 644}; 645 646/* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 647 * cleared to zero on ata_dev_init(). 648 */ 649#define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 650#define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 651 652struct ata_eh_info { 653 struct ata_device *dev; /* offending device */ 654 u32 serror; /* SError from LLDD */ 655 unsigned int err_mask; /* port-wide err_mask */ 656 unsigned int action; /* ATA_EH_* action mask */ 657 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 658 unsigned int flags; /* ATA_EHI_* flags */ 659 660 unsigned int probe_mask; 661 662 char desc[ATA_EH_DESC_LEN]; 663 int desc_len; 664}; 665 666struct ata_eh_context { 667 struct ata_eh_info i; 668 int tries[ATA_MAX_DEVICES]; 669 int cmd_timeout_idx[ATA_MAX_DEVICES] 670 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 671 unsigned int classes[ATA_MAX_DEVICES]; 672 unsigned int did_probe_mask; 673 unsigned int unloaded_mask; 674 unsigned int saved_ncq_enabled; 675 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 676 /* timestamp for the last reset attempt or success */ 677 unsigned long last_reset; 678}; 679 680struct ata_acpi_drive 681{ 682 u32 pio; 683 u32 dma; 684} __packed; 685 686struct ata_acpi_gtm { 687 struct ata_acpi_drive drive[2]; 688 u32 flags; 689} __packed; 690 691struct ata_link { 692 struct ata_port *ap; 693 int pmp; /* port multiplier port # */ 694 695 struct device tdev; 696 unsigned int active_tag; /* active tag on this link */ 697 u32 sactive; /* active NCQ commands */ 698 699 unsigned int flags; /* ATA_LFLAG_xxx */ 700 701 u32 saved_scontrol; /* SControl on probe */ 702 unsigned int hw_sata_spd_limit; 703 unsigned int sata_spd_limit; 704 unsigned int sata_spd; /* current SATA PHY speed */ 705 706 /* record runtime error info, protected by host_set lock */ 707 struct ata_eh_info eh_info; 708 /* EH context */ 709 struct ata_eh_context eh_context; 710 711 struct ata_device device[ATA_MAX_DEVICES]; 712}; 713#define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag) 714#define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0]) 715 716struct ata_port { 717 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 718 struct ata_port_operations *ops; 719 spinlock_t *lock; 720 /* Flags owned by the EH context. Only EH should touch these once the 721 port is active */ 722 unsigned long flags; /* ATA_FLAG_xxx */ 723 /* Flags that change dynamically, protected by ap->lock */ 724 unsigned int pflags; /* ATA_PFLAG_xxx */ 725 unsigned int print_id; /* user visible unique port ID */ 726 unsigned int port_no; /* 0 based port no. inside the host */ 727 728#ifdef CONFIG_ATA_SFF 729 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 730 u8 ctl; /* cache of ATA control register */ 731 u8 last_ctl; /* Cache last written value */ 732 struct ata_link* sff_pio_task_link; /* link currently used */ 733 struct delayed_work sff_pio_task; 734#ifdef CONFIG_ATA_BMDMA 735 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */ 736 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */ 737#endif /* CONFIG_ATA_BMDMA */ 738#endif /* CONFIG_ATA_SFF */ 739 740 unsigned int pio_mask; 741 unsigned int mwdma_mask; 742 unsigned int udma_mask; 743 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 744 745 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 746 unsigned long qc_allocated; 747 unsigned int qc_active; 748 int nr_active_links; /* #links with active qcs */ 749 750 struct ata_link link; /* host default link */ 751 struct ata_link *slave_link; /* see ata_slave_link_init() */ 752 753 int nr_pmp_links; /* nr of available PMP links */ 754 struct ata_link *pmp_link; /* array of PMP links */ 755 struct ata_link *excl_link; /* for PMP qc exclusion */ 756 757 struct ata_port_stats stats; 758 struct ata_host *host; 759 struct device *dev; 760 struct device tdev; 761 762 struct mutex scsi_scan_mutex; 763 struct delayed_work hotplug_task; 764 struct work_struct scsi_rescan_task; 765 766 unsigned int hsm_task_state; 767 768 u32 msg_enable; 769 struct list_head eh_done_q; 770 wait_queue_head_t eh_wait_q; 771 int eh_tries; 772 struct completion park_req_pending; 773 774 pm_message_t pm_mesg; 775 int *pm_result; 776 enum ata_lpm_policy lpm_policy; 777 778 struct timer_list fastdrain_timer; 779 unsigned long fastdrain_cnt; 780 781 int em_message_type; 782 void *private_data; 783 784#ifdef CONFIG_ATA_ACPI 785 acpi_handle acpi_handle; 786 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 787#endif 788 /* owned by EH */ 789 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 790}; 791 792/* The following initializer overrides a method to NULL whether one of 793 * its parent has the method defined or not. This is equivalent to 794 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 795 * expression and thus can't be used as an initializer. 796 */ 797#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 798 799struct ata_port_operations { 800 /* 801 * Command execution 802 */ 803 int (*qc_defer)(struct ata_queued_cmd *qc); 804 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 805 void (*qc_prep)(struct ata_queued_cmd *qc); 806 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 807 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 808 809 /* 810 * Configuration and exception handling 811 */ 812 int (*cable_detect)(struct ata_port *ap); 813 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 814 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 815 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 816 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 817 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 818 819 void (*dev_config)(struct ata_device *dev); 820 821 void (*freeze)(struct ata_port *ap); 822 void (*thaw)(struct ata_port *ap); 823 ata_prereset_fn_t prereset; 824 ata_reset_fn_t softreset; 825 ata_reset_fn_t hardreset; 826 ata_postreset_fn_t postreset; 827 ata_prereset_fn_t pmp_prereset; 828 ata_reset_fn_t pmp_softreset; 829 ata_reset_fn_t pmp_hardreset; 830 ata_postreset_fn_t pmp_postreset; 831 void (*error_handler)(struct ata_port *ap); 832 void (*lost_interrupt)(struct ata_port *ap); 833 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 834 835 /* 836 * Optional features 837 */ 838 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 839 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 840 void (*pmp_attach)(struct ata_port *ap); 841 void (*pmp_detach)(struct ata_port *ap); 842 int (*enable_pm)(struct ata_port *ap, enum ata_lpm_policy policy); 843 void (*disable_pm)(struct ata_port *ap); 844 845 /* 846 * Start, stop, suspend and resume 847 */ 848 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 849 int (*port_resume)(struct ata_port *ap); 850 int (*port_start)(struct ata_port *ap); 851 void (*port_stop)(struct ata_port *ap); 852 void (*host_stop)(struct ata_host *host); 853 854#ifdef CONFIG_ATA_SFF 855 /* 856 * SFF / taskfile oriented ops 857 */ 858 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 859 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl); 860 u8 (*sff_check_status)(struct ata_port *ap); 861 u8 (*sff_check_altstatus)(struct ata_port *ap); 862 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 863 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 864 void (*sff_exec_command)(struct ata_port *ap, 865 const struct ata_taskfile *tf); 866 unsigned int (*sff_data_xfer)(struct ata_device *dev, 867 unsigned char *buf, unsigned int buflen, int rw); 868 void (*sff_irq_on)(struct ata_port *); 869 bool (*sff_irq_check)(struct ata_port *); 870 void (*sff_irq_clear)(struct ata_port *); 871 void (*sff_drain_fifo)(struct ata_queued_cmd *qc); 872 873#ifdef CONFIG_ATA_BMDMA 874 void (*bmdma_setup)(struct ata_queued_cmd *qc); 875 void (*bmdma_start)(struct ata_queued_cmd *qc); 876 void (*bmdma_stop)(struct ata_queued_cmd *qc); 877 u8 (*bmdma_status)(struct ata_port *ap); 878#endif /* CONFIG_ATA_BMDMA */ 879#endif /* CONFIG_ATA_SFF */ 880 881 ssize_t (*em_show)(struct ata_port *ap, char *buf); 882 ssize_t (*em_store)(struct ata_port *ap, const char *message, 883 size_t size); 884 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 885 ssize_t (*sw_activity_store)(struct ata_device *dev, 886 enum sw_activity val); 887 /* 888 * Obsolete 889 */ 890 void (*phy_reset)(struct ata_port *ap); 891 void (*eng_timeout)(struct ata_port *ap); 892 893 /* 894 * ->inherits must be the last field and all the preceding 895 * fields must be pointers. 896 */ 897 const struct ata_port_operations *inherits; 898}; 899 900struct ata_port_info { 901 unsigned long flags; 902 unsigned long link_flags; 903 unsigned long pio_mask; 904 unsigned long mwdma_mask; 905 unsigned long udma_mask; 906 struct ata_port_operations *port_ops; 907 void *private_data; 908}; 909 910struct ata_timing { 911 unsigned short mode; /* ATA mode */ 912 unsigned short setup; /* t1 */ 913 unsigned short act8b; /* t2 for 8-bit I/O */ 914 unsigned short rec8b; /* t2i for 8-bit I/O */ 915 unsigned short cyc8b; /* t0 for 8-bit I/O */ 916 unsigned short active; /* t2 or tD */ 917 unsigned short recover; /* t2i or tK */ 918 unsigned short dmack_hold; /* tj */ 919 unsigned short cycle; /* t0 */ 920 unsigned short udma; /* t2CYCTYP/2 */ 921}; 922 923/* 924 * Core layer - drivers/ata/libata-core.c 925 */ 926extern const unsigned long sata_deb_timing_normal[]; 927extern const unsigned long sata_deb_timing_hotplug[]; 928extern const unsigned long sata_deb_timing_long[]; 929 930extern struct ata_port_operations ata_dummy_port_ops; 931extern const struct ata_port_info ata_dummy_port_info; 932 933static inline const unsigned long * 934sata_ehc_deb_timing(struct ata_eh_context *ehc) 935{ 936 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 937 return sata_deb_timing_hotplug; 938 else 939 return sata_deb_timing_normal; 940} 941 942static inline int ata_port_is_dummy(struct ata_port *ap) 943{ 944 return ap->ops == &ata_dummy_port_ops; 945} 946 947extern int sata_set_spd(struct ata_link *link); 948extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 949extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 950 int (*check_ready)(struct ata_link *link)); 951extern int sata_link_debounce(struct ata_link *link, 952 const unsigned long *params, unsigned long deadline); 953extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 954 unsigned long deadline); 955extern int sata_link_hardreset(struct ata_link *link, 956 const unsigned long *timing, unsigned long deadline, 957 bool *online, int (*check_ready)(struct ata_link *)); 958extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 959 unsigned long deadline); 960extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 961 962extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 963extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 964 const struct ata_port_info * const * ppi, int n_ports); 965extern int ata_slave_link_init(struct ata_port *ap); 966extern int ata_host_start(struct ata_host *host); 967extern int ata_host_register(struct ata_host *host, 968 struct scsi_host_template *sht); 969extern int ata_host_activate(struct ata_host *host, int irq, 970 irq_handler_t irq_handler, unsigned long irq_flags, 971 struct scsi_host_template *sht); 972extern void ata_host_detach(struct ata_host *host); 973extern void ata_host_init(struct ata_host *, struct device *, 974 unsigned long, struct ata_port_operations *); 975extern int ata_scsi_detect(struct scsi_host_template *sht); 976extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 977extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 978extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 979 int cmd, void __user *arg); 980extern void ata_sas_port_destroy(struct ata_port *); 981extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 982 struct ata_port_info *, struct Scsi_Host *); 983extern int ata_sas_port_init(struct ata_port *); 984extern int ata_sas_port_start(struct ata_port *ap); 985extern void ata_sas_port_stop(struct ata_port *ap); 986extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 987extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 988 struct ata_port *ap); 989extern int sata_scr_valid(struct ata_link *link); 990extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 991extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 992extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 993extern bool ata_link_online(struct ata_link *link); 994extern bool ata_link_offline(struct ata_link *link); 995#ifdef CONFIG_PM 996extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 997extern void ata_host_resume(struct ata_host *host); 998#endif 999extern int ata_ratelimit(void); 1000extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 1001 unsigned long interval, unsigned long timeout); 1002extern int atapi_cmd_type(u8 opcode); 1003extern void ata_tf_to_fis(const struct ata_taskfile *tf, 1004 u8 pmp, int is_cmd, u8 *fis); 1005extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 1006extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 1007 unsigned long mwdma_mask, unsigned long udma_mask); 1008extern void ata_unpack_xfermask(unsigned long xfer_mask, 1009 unsigned long *pio_mask, unsigned long *mwdma_mask, 1010 unsigned long *udma_mask); 1011extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 1012extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 1013extern int ata_xfer_mode2shift(unsigned long xfer_mode); 1014extern const char *ata_mode_string(unsigned long xfer_mask); 1015extern unsigned long ata_id_xfermask(const u16 *id); 1016extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1017extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 1018extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1019 unsigned int n_elem); 1020extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1021extern void ata_dev_disable(struct ata_device *adev); 1022extern void ata_id_string(const u16 *id, unsigned char *s, 1023 unsigned int ofs, unsigned int len); 1024extern void ata_id_c_string(const u16 *id, unsigned char *s, 1025 unsigned int ofs, unsigned int len); 1026extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1027 struct ata_taskfile *tf, u16 *id); 1028extern void ata_qc_complete(struct ata_queued_cmd *qc); 1029extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 1030extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 1031 void (*done)(struct scsi_cmnd *)); 1032extern int ata_std_bios_param(struct scsi_device *sdev, 1033 struct block_device *bdev, 1034 sector_t capacity, int geom[]); 1035extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev); 1036extern int ata_scsi_slave_config(struct scsi_device *sdev); 1037extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1038extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1039 int queue_depth, int reason); 1040extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1041extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1042 1043extern int ata_cable_40wire(struct ata_port *ap); 1044extern int ata_cable_80wire(struct ata_port *ap); 1045extern int ata_cable_sata(struct ata_port *ap); 1046extern int ata_cable_ignore(struct ata_port *ap); 1047extern int ata_cable_unknown(struct ata_port *ap); 1048 1049/* Timing helpers */ 1050extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1051extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1052extern int ata_timing_compute(struct ata_device *, unsigned short, 1053 struct ata_timing *, int, int); 1054extern void ata_timing_merge(const struct ata_timing *, 1055 const struct ata_timing *, struct ata_timing *, 1056 unsigned int); 1057extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1058 1059/* PCI */ 1060#ifdef CONFIG_PCI 1061struct pci_dev; 1062 1063struct pci_bits { 1064 unsigned int reg; /* PCI config register to read */ 1065 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1066 unsigned long mask; 1067 unsigned long val; 1068}; 1069 1070extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1071extern void ata_pci_remove_one(struct pci_dev *pdev); 1072 1073#ifdef CONFIG_PM 1074extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1075extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1076extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1077extern int ata_pci_device_resume(struct pci_dev *pdev); 1078#endif /* CONFIG_PM */ 1079#endif /* CONFIG_PCI */ 1080 1081/* 1082 * ACPI - drivers/ata/libata-acpi.c 1083 */ 1084#ifdef CONFIG_ATA_ACPI 1085static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1086{ 1087 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1088 return &ap->__acpi_init_gtm; 1089 return NULL; 1090} 1091int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1092int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1093unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1094 const struct ata_acpi_gtm *gtm); 1095int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1096#else 1097static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1098{ 1099 return NULL; 1100} 1101 1102static inline int ata_acpi_stm(const struct ata_port *ap, 1103 struct ata_acpi_gtm *stm) 1104{ 1105 return -ENOSYS; 1106} 1107 1108static inline int ata_acpi_gtm(const struct ata_port *ap, 1109 struct ata_acpi_gtm *stm) 1110{ 1111 return -ENOSYS; 1112} 1113 1114static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1115 const struct ata_acpi_gtm *gtm) 1116{ 1117 return 0; 1118} 1119 1120static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1121 const struct ata_acpi_gtm *gtm) 1122{ 1123 return 0; 1124} 1125#endif 1126 1127/* 1128 * EH - drivers/ata/libata-eh.c 1129 */ 1130extern void ata_port_schedule_eh(struct ata_port *ap); 1131extern int ata_link_abort(struct ata_link *link); 1132extern int ata_port_abort(struct ata_port *ap); 1133extern int ata_port_freeze(struct ata_port *ap); 1134extern int sata_async_notification(struct ata_port *ap); 1135 1136extern void ata_eh_freeze_port(struct ata_port *ap); 1137extern void ata_eh_thaw_port(struct ata_port *ap); 1138 1139extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1140extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1141extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1142 1143extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1144 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1145 ata_postreset_fn_t postreset); 1146extern void ata_std_error_handler(struct ata_port *ap); 1147 1148/* 1149 * Base operations to inherit from and initializers for sht 1150 * 1151 * Operations 1152 * 1153 * base : Common to all libata drivers. 1154 * sata : SATA controllers w/ native interface. 1155 * pmp : SATA controllers w/ PMP support. 1156 * sff : SFF ATA controllers w/o BMDMA support. 1157 * bmdma : SFF ATA controllers w/ BMDMA support. 1158 * 1159 * sht initializers 1160 * 1161 * BASE : Common to all libata drivers. The user must set 1162 * sg_tablesize and dma_boundary. 1163 * PIO : SFF ATA controllers w/ only PIO support. 1164 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1165 * dma_boundary are set to BMDMA limits. 1166 * NCQ : SATA controllers supporting NCQ. The user must set 1167 * sg_tablesize, dma_boundary and can_queue. 1168 */ 1169extern const struct ata_port_operations ata_base_port_ops; 1170extern const struct ata_port_operations sata_port_ops; 1171extern struct device_attribute *ata_common_sdev_attrs[]; 1172 1173#define ATA_BASE_SHT(drv_name) \ 1174 .module = THIS_MODULE, \ 1175 .name = drv_name, \ 1176 .ioctl = ata_scsi_ioctl, \ 1177 .queuecommand = ata_scsi_queuecmd, \ 1178 .can_queue = ATA_DEF_QUEUE, \ 1179 .this_id = ATA_SHT_THIS_ID, \ 1180 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1181 .emulated = ATA_SHT_EMULATED, \ 1182 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1183 .proc_name = drv_name, \ 1184 .slave_configure = ata_scsi_slave_config, \ 1185 .slave_destroy = ata_scsi_slave_destroy, \ 1186 .bios_param = ata_std_bios_param, \ 1187 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \ 1188 .sdev_attrs = ata_common_sdev_attrs 1189 1190#define ATA_NCQ_SHT(drv_name) \ 1191 ATA_BASE_SHT(drv_name), \ 1192 .change_queue_depth = ata_scsi_change_queue_depth 1193 1194/* 1195 * PMP helpers 1196 */ 1197#ifdef CONFIG_SATA_PMP 1198static inline bool sata_pmp_supported(struct ata_port *ap) 1199{ 1200 return ap->flags & ATA_FLAG_PMP; 1201} 1202 1203static inline bool sata_pmp_attached(struct ata_port *ap) 1204{ 1205 return ap->nr_pmp_links != 0; 1206} 1207 1208static inline int ata_is_host_link(const struct ata_link *link) 1209{ 1210 return link == &link->ap->link || link == link->ap->slave_link; 1211} 1212#else /* CONFIG_SATA_PMP */ 1213static inline bool sata_pmp_supported(struct ata_port *ap) 1214{ 1215 return false; 1216} 1217 1218static inline bool sata_pmp_attached(struct ata_port *ap) 1219{ 1220 return false; 1221} 1222 1223static inline int ata_is_host_link(const struct ata_link *link) 1224{ 1225 return 1; 1226} 1227#endif /* CONFIG_SATA_PMP */ 1228 1229static inline int sata_srst_pmp(struct ata_link *link) 1230{ 1231 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1232 return SATA_PMP_CTRL_PORT; 1233 return link->pmp; 1234} 1235 1236/* 1237 * printk helpers 1238 */ 1239#define ata_port_printk(ap, lv, fmt, args...) \ 1240 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1241 1242#define ata_link_printk(link, lv, fmt, args...) do { \ 1243 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1244 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1245 (link)->pmp , ##args); \ 1246 else \ 1247 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1248 } while(0) 1249 1250#define ata_dev_printk(dev, lv, fmt, args...) \ 1251 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1252 (dev)->link->pmp + (dev)->devno , ##args) 1253 1254/* 1255 * ata_eh_info helpers 1256 */ 1257extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1258 __attribute__ ((format (printf, 2, 3))); 1259extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1260 __attribute__ ((format (printf, 2, 3))); 1261extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1262 1263static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1264{ 1265 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1266 ehi->flags |= ATA_EHI_HOTPLUGGED; 1267 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1268 ehi->err_mask |= AC_ERR_ATA_BUS; 1269} 1270 1271/* 1272 * port description helpers 1273 */ 1274extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1275 __attribute__ ((format (printf, 2, 3))); 1276#ifdef CONFIG_PCI 1277extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1278 const char *name); 1279#endif 1280 1281static inline unsigned int ata_tag_valid(unsigned int tag) 1282{ 1283 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1284} 1285 1286static inline unsigned int ata_tag_internal(unsigned int tag) 1287{ 1288 return tag == ATA_TAG_INTERNAL; 1289} 1290 1291/* 1292 * device helpers 1293 */ 1294static inline unsigned int ata_class_enabled(unsigned int class) 1295{ 1296 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1297 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1298} 1299 1300static inline unsigned int ata_class_disabled(unsigned int class) 1301{ 1302 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1303 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1304} 1305 1306static inline unsigned int ata_class_absent(unsigned int class) 1307{ 1308 return !ata_class_enabled(class) && !ata_class_disabled(class); 1309} 1310 1311static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1312{ 1313 return ata_class_enabled(dev->class); 1314} 1315 1316static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1317{ 1318 return ata_class_disabled(dev->class); 1319} 1320 1321static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1322{ 1323 return ata_class_absent(dev->class); 1324} 1325 1326/* 1327 * link helpers 1328 */ 1329static inline int ata_link_max_devices(const struct ata_link *link) 1330{ 1331 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1332 return 2; 1333 return 1; 1334} 1335 1336static inline int ata_link_active(struct ata_link *link) 1337{ 1338 return ata_tag_valid(link->active_tag) || link->sactive; 1339} 1340 1341/* 1342 * Iterators 1343 * 1344 * ATA_LITER_* constants are used to select link iteration mode and 1345 * ATA_DITER_* device iteration mode. 1346 * 1347 * For a custom iteration directly using ata_{link|dev}_next(), if 1348 * @link or @dev, respectively, is NULL, the first element is 1349 * returned. @dev and @link can be any valid device or link and the 1350 * next element according to the iteration mode will be returned. 1351 * After the last element, NULL is returned. 1352 */ 1353enum ata_link_iter_mode { 1354 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1355 * host link. no slave link */ 1356 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1357 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1358 * slave link still comes after host link */ 1359}; 1360 1361enum ata_dev_iter_mode { 1362 ATA_DITER_ENABLED, 1363 ATA_DITER_ENABLED_REVERSE, 1364 ATA_DITER_ALL, 1365 ATA_DITER_ALL_REVERSE, 1366}; 1367 1368extern struct ata_link *ata_link_next(struct ata_link *link, 1369 struct ata_port *ap, 1370 enum ata_link_iter_mode mode); 1371 1372extern struct ata_device *ata_dev_next(struct ata_device *dev, 1373 struct ata_link *link, 1374 enum ata_dev_iter_mode mode); 1375 1376/* 1377 * Shortcut notation for iterations 1378 * 1379 * ata_for_each_link() iterates over each link of @ap according to 1380 * @mode. @link points to the current link in the loop. @link is 1381 * NULL after loop termination. ata_for_each_dev() works the same way 1382 * except that it iterates over each device of @link. 1383 * 1384 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1385 * specified when using the following shorthand notations. Only the 1386 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1387 * specified. This not only increases brevity but also makes it 1388 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1389 */ 1390#define ata_for_each_link(link, ap, mode) \ 1391 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1392 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1393 1394#define ata_for_each_dev(dev, link, mode) \ 1395 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1396 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1397 1398/** 1399 * ata_ncq_enabled - Test whether NCQ is enabled 1400 * @dev: ATA device to test for 1401 * 1402 * LOCKING: 1403 * spin_lock_irqsave(host lock) 1404 * 1405 * RETURNS: 1406 * 1 if NCQ is enabled for @dev, 0 otherwise. 1407 */ 1408static inline int ata_ncq_enabled(struct ata_device *dev) 1409{ 1410 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1411 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1412} 1413 1414static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1415{ 1416 qc->tf.ctl |= ATA_NIEN; 1417} 1418 1419static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1420 unsigned int tag) 1421{ 1422 if (likely(ata_tag_valid(tag))) 1423 return &ap->qcmd[tag]; 1424 return NULL; 1425} 1426 1427static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1428 unsigned int tag) 1429{ 1430 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1431 1432 if (unlikely(!qc) || !ap->ops->error_handler) 1433 return qc; 1434 1435 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1436 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1437 return qc; 1438 1439 return NULL; 1440} 1441 1442static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1443{ 1444 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1445} 1446 1447static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1448{ 1449 memset(tf, 0, sizeof(*tf)); 1450 1451#ifdef CONFIG_ATA_SFF 1452 tf->ctl = dev->link->ap->ctl; 1453#else 1454 tf->ctl = ATA_DEVCTL_OBS; 1455#endif 1456 if (dev->devno == 0) 1457 tf->device = ATA_DEVICE_OBS; 1458 else 1459 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1460} 1461 1462static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1463{ 1464 qc->dma_dir = DMA_NONE; 1465 qc->sg = NULL; 1466 qc->flags = 0; 1467 qc->cursg = NULL; 1468 qc->cursg_ofs = 0; 1469 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1470 qc->n_elem = 0; 1471 qc->err_mask = 0; 1472 qc->sect_size = ATA_SECT_SIZE; 1473 1474 ata_tf_init(qc->dev, &qc->tf); 1475 1476 /* init result_tf such that it indicates normal completion */ 1477 qc->result_tf.command = ATA_DRDY; 1478 qc->result_tf.feature = 0; 1479} 1480 1481static inline int ata_try_flush_cache(const struct ata_device *dev) 1482{ 1483 return ata_id_wcache_enabled(dev->id) || 1484 ata_id_has_flush(dev->id) || 1485 ata_id_has_flush_ext(dev->id); 1486} 1487 1488static inline unsigned int ac_err_mask(u8 status) 1489{ 1490 if (status & (ATA_BUSY | ATA_DRQ)) 1491 return AC_ERR_HSM; 1492 if (status & (ATA_ERR | ATA_DF)) 1493 return AC_ERR_DEV; 1494 return 0; 1495} 1496 1497static inline unsigned int __ac_err_mask(u8 status) 1498{ 1499 unsigned int mask = ac_err_mask(status); 1500 if (mask == 0) 1501 return AC_ERR_OTHER; 1502 return mask; 1503} 1504 1505static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1506{ 1507 return *(struct ata_port **)&host->hostdata[0]; 1508} 1509 1510static inline int ata_check_ready(u8 status) 1511{ 1512 if (!(status & ATA_BUSY)) 1513 return 1; 1514 1515 /* 0xff indicates either no device or device not ready */ 1516 if (status == 0xff) 1517 return -ENODEV; 1518 1519 return 0; 1520} 1521 1522static inline unsigned long ata_deadline(unsigned long from_jiffies, 1523 unsigned long timeout_msecs) 1524{ 1525 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1526} 1527 1528/* Don't open code these in drivers as there are traps. Firstly the range may 1529 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1530 > UDMA_0. Dyma ddreigiau */ 1531 1532static inline int ata_using_mwdma(struct ata_device *adev) 1533{ 1534 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1535 return 1; 1536 return 0; 1537} 1538 1539static inline int ata_using_udma(struct ata_device *adev) 1540{ 1541 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1542 return 1; 1543 return 0; 1544} 1545 1546static inline int ata_dma_enabled(struct ata_device *adev) 1547{ 1548 return (adev->dma_mode == 0xFF ? 0 : 1); 1549} 1550 1551/************************************************************************** 1552 * PMP - drivers/ata/libata-pmp.c 1553 */ 1554#ifdef CONFIG_SATA_PMP 1555 1556extern const struct ata_port_operations sata_pmp_port_ops; 1557 1558extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1559extern void sata_pmp_error_handler(struct ata_port *ap); 1560 1561#else /* CONFIG_SATA_PMP */ 1562 1563#define sata_pmp_port_ops sata_port_ops 1564#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1565#define sata_pmp_error_handler ata_std_error_handler 1566 1567#endif /* CONFIG_SATA_PMP */ 1568 1569 1570/************************************************************************** 1571 * SFF - drivers/ata/libata-sff.c 1572 */ 1573#ifdef CONFIG_ATA_SFF 1574 1575extern const struct ata_port_operations ata_sff_port_ops; 1576extern const struct ata_port_operations ata_bmdma32_port_ops; 1577 1578/* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1579#define ATA_PIO_SHT(drv_name) \ 1580 ATA_BASE_SHT(drv_name), \ 1581 .sg_tablesize = LIBATA_MAX_PRD, \ 1582 .dma_boundary = ATA_DMA_BOUNDARY 1583 1584extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1585extern u8 ata_sff_check_status(struct ata_port *ap); 1586extern void ata_sff_pause(struct ata_port *ap); 1587extern void ata_sff_dma_pause(struct ata_port *ap); 1588extern int ata_sff_busy_sleep(struct ata_port *ap, 1589 unsigned long timeout_pat, unsigned long timeout); 1590extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1591extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1592extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1593extern void ata_sff_exec_command(struct ata_port *ap, 1594 const struct ata_taskfile *tf); 1595extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1596 unsigned char *buf, unsigned int buflen, int rw); 1597extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1598 unsigned char *buf, unsigned int buflen, int rw); 1599extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1600 unsigned char *buf, unsigned int buflen, int rw); 1601extern void ata_sff_irq_on(struct ata_port *ap); 1602extern void ata_sff_irq_clear(struct ata_port *ap); 1603extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1604 u8 status, int in_wq); 1605extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay); 1606extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1607extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1608extern unsigned int ata_sff_port_intr(struct ata_port *ap, 1609 struct ata_queued_cmd *qc); 1610extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1611extern void ata_sff_lost_interrupt(struct ata_port *ap); 1612extern void ata_sff_freeze(struct ata_port *ap); 1613extern void ata_sff_thaw(struct ata_port *ap); 1614extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1615extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1616 u8 *r_err); 1617extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1618 unsigned long deadline); 1619extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1620 unsigned long deadline); 1621extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1622 unsigned long deadline); 1623extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1624extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1625extern void ata_sff_error_handler(struct ata_port *ap); 1626extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1627#ifdef CONFIG_PCI 1628extern int ata_pci_sff_init_host(struct ata_host *host); 1629extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1630 const struct ata_port_info * const * ppi, 1631 struct ata_host **r_host); 1632extern int ata_pci_sff_activate_host(struct ata_host *host, 1633 irq_handler_t irq_handler, 1634 struct scsi_host_template *sht); 1635extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1636 const struct ata_port_info * const * ppi, 1637 struct scsi_host_template *sht, void *host_priv, int hflags); 1638#endif /* CONFIG_PCI */ 1639 1640#ifdef CONFIG_ATA_BMDMA 1641 1642extern const struct ata_port_operations ata_bmdma_port_ops; 1643 1644#define ATA_BMDMA_SHT(drv_name) \ 1645 ATA_BASE_SHT(drv_name), \ 1646 .sg_tablesize = LIBATA_MAX_PRD, \ 1647 .dma_boundary = ATA_DMA_BOUNDARY 1648 1649extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc); 1650extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc); 1651extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc); 1652extern unsigned int ata_bmdma_port_intr(struct ata_port *ap, 1653 struct ata_queued_cmd *qc); 1654extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance); 1655extern void ata_bmdma_error_handler(struct ata_port *ap); 1656extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 1657extern void ata_bmdma_irq_clear(struct ata_port *ap); 1658extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1659extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1660extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1661extern u8 ata_bmdma_status(struct ata_port *ap); 1662extern int ata_bmdma_port_start(struct ata_port *ap); 1663extern int ata_bmdma_port_start32(struct ata_port *ap); 1664 1665#ifdef CONFIG_PCI 1666extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1667extern void ata_pci_bmdma_init(struct ata_host *host); 1668extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev, 1669 const struct ata_port_info * const * ppi, 1670 struct ata_host **r_host); 1671extern int ata_pci_bmdma_init_one(struct pci_dev *pdev, 1672 const struct ata_port_info * const * ppi, 1673 struct scsi_host_template *sht, 1674 void *host_priv, int hflags); 1675#endif /* CONFIG_PCI */ 1676#endif /* CONFIG_ATA_BMDMA */ 1677 1678/** 1679 * ata_sff_busy_wait - Wait for a port status register 1680 * @ap: Port to wait for. 1681 * @bits: bits that must be clear 1682 * @max: number of 10uS waits to perform 1683 * 1684 * Waits up to max*10 microseconds for the selected bits in the port's 1685 * status register to be cleared. 1686 * Returns final value of status register. 1687 * 1688 * LOCKING: 1689 * Inherited from caller. 1690 */ 1691static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1692 unsigned int max) 1693{ 1694 u8 status; 1695 1696 do { 1697 udelay(10); 1698 status = ap->ops->sff_check_status(ap); 1699 max--; 1700 } while (status != 0xff && (status & bits) && (max > 0)); 1701 1702 return status; 1703} 1704 1705/** 1706 * ata_wait_idle - Wait for a port to be idle. 1707 * @ap: Port to wait for. 1708 * 1709 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1710 * Returns final value of status register. 1711 * 1712 * LOCKING: 1713 * Inherited from caller. 1714 */ 1715static inline u8 ata_wait_idle(struct ata_port *ap) 1716{ 1717 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1718 1719#ifdef ATA_DEBUG 1720 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1721 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1722 status); 1723#endif 1724 1725 return status; 1726} 1727#endif /* CONFIG_ATA_SFF */ 1728 1729#endif /* __LINUX_LIBATA_H__ */ 1730