libata.h revision d0cb43b35d64877b2944bd37719708be5d7bbf99
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_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */ 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_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_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 194 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 195 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 196 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 197 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 198 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */ 199 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 200 * management */ 201 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 202 * led */ 203 204 /* The following flag belongs to ap->pflags but is kept in 205 * ap->flags because it's referenced in many LLDs and will be 206 * removed in not-too-distant future. 207 */ 208 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 209 210 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 211 212 213 /* struct ata_port pflags */ 214 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 215 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 216 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 217 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 218 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 219 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 220 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 221 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 222 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 223 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 224 225 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 226 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 227 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 228 229 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 230 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 231 232 /* struct ata_queued_cmd flags */ 233 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 234 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 235 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 236 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 237 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 238 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 239 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 240 241 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 242 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 243 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 244 245 /* host set flags */ 246 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 247 ATA_HOST_STARTED = (1 << 1), /* Host started */ 248 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 249 250 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 251 252 /* various lengths of time */ 253 ATA_TMOUT_BOOT = 30000, /* heuristic */ 254 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 255 ATA_TMOUT_INTERNAL_QUICK = 5000, 256 ATA_TMOUT_MAX_PARK = 30000, 257 258 /* FIXME: GoVault needs 2s but we can't afford that without 259 * parallel probing. 800ms is enough for iVDR disk 260 * HHD424020F7SV00. Increase to 2secs when parallel probing 261 * is in place. 262 */ 263 ATA_TMOUT_FF_WAIT = 800, 264 265 /* Spec mandates to wait for ">= 2ms" before checking status 266 * after reset. We wait 150ms, because that was the magic 267 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 268 * the period of time between when the ATA command register is 269 * written, and then status is checked. Because waiting for 270 * "a while" before checking status is fine, post SRST, we 271 * perform this magic delay here as well. 272 * 273 * Old drivers/ide uses the 2mS rule and then waits for ready. 274 */ 275 ATA_WAIT_AFTER_RESET = 150, 276 277 /* If PMP is supported, we have to do follow-up SRST. As some 278 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 279 * advised to wait only for the following duration before 280 * doing SRST. 281 */ 282 ATA_TMOUT_PMP_SRST_WAIT = 5000, 283 284 /* ATA bus states */ 285 BUS_UNKNOWN = 0, 286 BUS_DMA = 1, 287 BUS_IDLE = 2, 288 BUS_NOINTR = 3, 289 BUS_NODATA = 4, 290 BUS_TIMER = 5, 291 BUS_PIO = 6, 292 BUS_EDD = 7, 293 BUS_IDENTIFY = 8, 294 BUS_PACKET = 9, 295 296 /* SATA port states */ 297 PORT_UNKNOWN = 0, 298 PORT_ENABLED = 1, 299 PORT_DISABLED = 2, 300 301 /* encoding various smaller bitmaps into a single 302 * unsigned long bitmap 303 */ 304 ATA_NR_PIO_MODES = 7, 305 ATA_NR_MWDMA_MODES = 5, 306 ATA_NR_UDMA_MODES = 8, 307 308 ATA_SHIFT_PIO = 0, 309 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 310 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 311 312 /* size of buffer to pad xfers ending on unaligned boundaries */ 313 ATA_DMA_PAD_SZ = 4, 314 315 /* ering size */ 316 ATA_ERING_SIZE = 32, 317 318 /* return values for ->qc_defer */ 319 ATA_DEFER_LINK = 1, 320 ATA_DEFER_PORT = 2, 321 322 /* desc_len for ata_eh_info and context */ 323 ATA_EH_DESC_LEN = 80, 324 325 /* reset / recovery action types */ 326 ATA_EH_REVALIDATE = (1 << 0), 327 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 328 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 329 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 330 ATA_EH_ENABLE_LINK = (1 << 3), 331 ATA_EH_LPM = (1 << 4), /* link power management action */ 332 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 333 334 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 335 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 336 ATA_EH_ENABLE_LINK | ATA_EH_LPM, 337 338 /* ata_eh_info->flags */ 339 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 340 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 341 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 342 343 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 344 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 345 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 346 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 347 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 348 349 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 350 351 /* mask of flags to transfer *to* the slave link */ 352 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 353 354 /* max tries if error condition is still set after ->error_handler */ 355 ATA_EH_MAX_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 = 5, 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_IPM = (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 */ 389 390 /* DMA mask for user DMA control: User visible values; DO NOT 391 renumber */ 392 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 393 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 394 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 395 396 /* ATAPI command types */ 397 ATAPI_READ = 0, /* READs */ 398 ATAPI_WRITE = 1, /* WRITEs */ 399 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 400 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 401 ATAPI_MISC = 4, /* the rest */ 402 403 /* Timing constants */ 404 ATA_TIMING_SETUP = (1 << 0), 405 ATA_TIMING_ACT8B = (1 << 1), 406 ATA_TIMING_REC8B = (1 << 2), 407 ATA_TIMING_CYC8B = (1 << 3), 408 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 409 ATA_TIMING_CYC8B, 410 ATA_TIMING_ACTIVE = (1 << 4), 411 ATA_TIMING_RECOVER = (1 << 5), 412 ATA_TIMING_DMACK_HOLD = (1 << 6), 413 ATA_TIMING_CYCLE = (1 << 7), 414 ATA_TIMING_UDMA = (1 << 8), 415 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 416 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 417 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 418 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 419 ATA_TIMING_UDMA, 420}; 421 422enum ata_xfer_mask { 423 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 424 << ATA_SHIFT_PIO, 425 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 426 << ATA_SHIFT_MWDMA, 427 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 428 << ATA_SHIFT_UDMA, 429}; 430 431enum hsm_task_states { 432 HSM_ST_IDLE, /* no command on going */ 433 HSM_ST_FIRST, /* (waiting the device to) 434 write CDB or first data block */ 435 HSM_ST, /* (waiting the device to) transfer data */ 436 HSM_ST_LAST, /* (waiting the device to) complete command */ 437 HSM_ST_ERR, /* error */ 438}; 439 440enum ata_completion_errors { 441 AC_ERR_DEV = (1 << 0), /* device reported error */ 442 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 443 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 444 AC_ERR_MEDIA = (1 << 3), /* media error */ 445 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 446 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 447 AC_ERR_SYSTEM = (1 << 6), /* system error */ 448 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 449 AC_ERR_OTHER = (1 << 8), /* unknown */ 450 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 451 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 452}; 453 454/* forward declarations */ 455struct scsi_device; 456struct ata_port_operations; 457struct ata_port; 458struct ata_link; 459struct ata_queued_cmd; 460 461/* typedefs */ 462typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 463typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 464typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 465 unsigned long deadline); 466typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 467 468/* 469 * host pm policy: If you alter this, you also need to alter libata-scsi.c 470 * (for the ascii descriptions) 471 */ 472enum link_pm { 473 NOT_AVAILABLE, 474 MIN_POWER, 475 MAX_PERFORMANCE, 476 MEDIUM_POWER, 477}; 478extern struct device_attribute dev_attr_link_power_management_policy; 479extern struct device_attribute dev_attr_unload_heads; 480extern struct device_attribute dev_attr_em_message_type; 481extern struct device_attribute dev_attr_em_message; 482extern struct device_attribute dev_attr_sw_activity; 483 484enum sw_activity { 485 OFF, 486 BLINK_ON, 487 BLINK_OFF, 488}; 489 490#ifdef CONFIG_ATA_SFF 491struct ata_ioports { 492 void __iomem *cmd_addr; 493 void __iomem *data_addr; 494 void __iomem *error_addr; 495 void __iomem *feature_addr; 496 void __iomem *nsect_addr; 497 void __iomem *lbal_addr; 498 void __iomem *lbam_addr; 499 void __iomem *lbah_addr; 500 void __iomem *device_addr; 501 void __iomem *status_addr; 502 void __iomem *command_addr; 503 void __iomem *altstatus_addr; 504 void __iomem *ctl_addr; 505 void __iomem *bmdma_addr; 506 void __iomem *scr_addr; 507}; 508#endif /* CONFIG_ATA_SFF */ 509 510struct ata_host { 511 spinlock_t lock; 512 struct device *dev; 513 void __iomem * const *iomap; 514 unsigned int n_ports; 515 void *private_data; 516 struct ata_port_operations *ops; 517 unsigned long flags; 518#ifdef CONFIG_ATA_ACPI 519 acpi_handle acpi_handle; 520#endif 521 struct ata_port *simplex_claimed; /* channel owning the DMA */ 522 struct ata_port *ports[0]; 523}; 524 525struct ata_queued_cmd { 526 struct ata_port *ap; 527 struct ata_device *dev; 528 529 struct scsi_cmnd *scsicmd; 530 void (*scsidone)(struct scsi_cmnd *); 531 532 struct ata_taskfile tf; 533 u8 cdb[ATAPI_CDB_LEN]; 534 535 unsigned long flags; /* ATA_QCFLAG_xxx */ 536 unsigned int tag; 537 unsigned int n_elem; 538 unsigned int orig_n_elem; 539 540 int dma_dir; 541 542 unsigned int sect_size; 543 544 unsigned int nbytes; 545 unsigned int extrabytes; 546 unsigned int curbytes; 547 548 struct scatterlist *cursg; 549 unsigned int cursg_ofs; 550 551 struct scatterlist sgent; 552 553 struct scatterlist *sg; 554 555 unsigned int err_mask; 556 struct ata_taskfile result_tf; 557 ata_qc_cb_t complete_fn; 558 559 void *private_data; 560 void *lldd_task; 561}; 562 563struct ata_port_stats { 564 unsigned long unhandled_irq; 565 unsigned long idle_irq; 566 unsigned long rw_reqbuf; 567}; 568 569struct ata_ering_entry { 570 unsigned int eflags; 571 unsigned int err_mask; 572 u64 timestamp; 573}; 574 575struct ata_ering { 576 int cursor; 577 struct ata_ering_entry ring[ATA_ERING_SIZE]; 578}; 579 580struct ata_device { 581 struct ata_link *link; 582 unsigned int devno; /* 0 or 1 */ 583 unsigned int horkage; /* List of broken features */ 584 unsigned long flags; /* ATA_DFLAG_xxx */ 585 struct scsi_device *sdev; /* attached SCSI device */ 586#ifdef CONFIG_ATA_ACPI 587 acpi_handle acpi_handle; 588 union acpi_object *gtf_cache; 589#endif 590 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 591 u64 n_sectors; /* size of device, if ATA */ 592 unsigned int class; /* ATA_DEV_xxx */ 593 unsigned long unpark_deadline; 594 595 u8 pio_mode; 596 u8 dma_mode; 597 u8 xfer_mode; 598 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 599 600 unsigned int multi_count; /* sectors count for 601 READ/WRITE MULTIPLE */ 602 unsigned int max_sectors; /* per-device max sectors */ 603 unsigned int cdb_len; 604 605 /* per-dev xfer mask */ 606 unsigned long pio_mask; 607 unsigned long mwdma_mask; 608 unsigned long udma_mask; 609 610 /* for CHS addressing */ 611 u16 cylinders; /* Number of cylinders */ 612 u16 heads; /* Number of heads */ 613 u16 sectors; /* Number of sectors per track */ 614 615 union { 616 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 617 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 618 }; 619 620 /* error history */ 621 int spdn_cnt; 622 /* ering is CLEAR_END, read comment above CLEAR_END */ 623 struct ata_ering ering; 624}; 625 626/* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 627 * cleared to zero on ata_dev_init(). 628 */ 629#define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 630#define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 631 632struct ata_eh_info { 633 struct ata_device *dev; /* offending device */ 634 u32 serror; /* SError from LLDD */ 635 unsigned int err_mask; /* port-wide err_mask */ 636 unsigned int action; /* ATA_EH_* action mask */ 637 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 638 unsigned int flags; /* ATA_EHI_* flags */ 639 640 unsigned int probe_mask; 641 642 char desc[ATA_EH_DESC_LEN]; 643 int desc_len; 644}; 645 646struct ata_eh_context { 647 struct ata_eh_info i; 648 int tries[ATA_MAX_DEVICES]; 649 int cmd_timeout_idx[ATA_MAX_DEVICES] 650 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 651 unsigned int classes[ATA_MAX_DEVICES]; 652 unsigned int did_probe_mask; 653 unsigned int unloaded_mask; 654 unsigned int saved_ncq_enabled; 655 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 656 /* timestamp for the last reset attempt or success */ 657 unsigned long last_reset; 658}; 659 660struct ata_acpi_drive 661{ 662 u32 pio; 663 u32 dma; 664} __packed; 665 666struct ata_acpi_gtm { 667 struct ata_acpi_drive drive[2]; 668 u32 flags; 669} __packed; 670 671struct ata_link { 672 struct ata_port *ap; 673 int pmp; /* port multiplier port # */ 674 675 unsigned int active_tag; /* active tag on this link */ 676 u32 sactive; /* active NCQ commands */ 677 678 unsigned int flags; /* ATA_LFLAG_xxx */ 679 680 u32 saved_scontrol; /* SControl on probe */ 681 unsigned int hw_sata_spd_limit; 682 unsigned int sata_spd_limit; 683 unsigned int sata_spd; /* current SATA PHY speed */ 684 685 /* record runtime error info, protected by host_set lock */ 686 struct ata_eh_info eh_info; 687 /* EH context */ 688 struct ata_eh_context eh_context; 689 690 struct ata_device device[ATA_MAX_DEVICES]; 691}; 692 693struct ata_port { 694 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 695 struct ata_port_operations *ops; 696 spinlock_t *lock; 697 /* Flags owned by the EH context. Only EH should touch these once the 698 port is active */ 699 unsigned long flags; /* ATA_FLAG_xxx */ 700 /* Flags that change dynamically, protected by ap->lock */ 701 unsigned int pflags; /* ATA_PFLAG_xxx */ 702 unsigned int print_id; /* user visible unique port ID */ 703 unsigned int port_no; /* 0 based port no. inside the host */ 704 705 struct ata_prd *prd; /* our SG list */ 706 dma_addr_t prd_dma; /* and its DMA mapping */ 707 708#ifdef CONFIG_ATA_SFF 709 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 710#endif /* CONFIG_ATA_SFF */ 711 712 u8 ctl; /* cache of ATA control register */ 713 u8 last_ctl; /* Cache last written value */ 714 unsigned int pio_mask; 715 unsigned int mwdma_mask; 716 unsigned int udma_mask; 717 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 718 719 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 720 unsigned long qc_allocated; 721 unsigned int qc_active; 722 int nr_active_links; /* #links with active qcs */ 723 724 struct ata_link link; /* host default link */ 725 struct ata_link *slave_link; /* see ata_slave_link_init() */ 726 727 int nr_pmp_links; /* nr of available PMP links */ 728 struct ata_link *pmp_link; /* array of PMP links */ 729 struct ata_link *excl_link; /* for PMP qc exclusion */ 730 731 struct ata_port_stats stats; 732 struct ata_host *host; 733 struct device *dev; 734 735 void *port_task_data; 736 struct delayed_work port_task; 737 struct delayed_work hotplug_task; 738 struct work_struct scsi_rescan_task; 739 740 unsigned int hsm_task_state; 741 742 u32 msg_enable; 743 struct list_head eh_done_q; 744 wait_queue_head_t eh_wait_q; 745 int eh_tries; 746 struct completion park_req_pending; 747 748 pm_message_t pm_mesg; 749 int *pm_result; 750 enum link_pm pm_policy; 751 752 struct timer_list fastdrain_timer; 753 unsigned long fastdrain_cnt; 754 755 int em_message_type; 756 void *private_data; 757 758#ifdef CONFIG_ATA_ACPI 759 acpi_handle acpi_handle; 760 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 761#endif 762 /* owned by EH */ 763 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 764}; 765 766/* The following initializer overrides a method to NULL whether one of 767 * its parent has the method defined or not. This is equivalent to 768 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 769 * expression and thus can't be used as an initializer. 770 */ 771#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 772 773struct ata_port_operations { 774 /* 775 * Command execution 776 */ 777 int (*qc_defer)(struct ata_queued_cmd *qc); 778 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 779 void (*qc_prep)(struct ata_queued_cmd *qc); 780 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 781 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 782 783 /* 784 * Configuration and exception handling 785 */ 786 int (*cable_detect)(struct ata_port *ap); 787 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 788 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 789 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 790 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 791 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 792 793 void (*dev_config)(struct ata_device *dev); 794 795 void (*freeze)(struct ata_port *ap); 796 void (*thaw)(struct ata_port *ap); 797 ata_prereset_fn_t prereset; 798 ata_reset_fn_t softreset; 799 ata_reset_fn_t hardreset; 800 ata_postreset_fn_t postreset; 801 ata_prereset_fn_t pmp_prereset; 802 ata_reset_fn_t pmp_softreset; 803 ata_reset_fn_t pmp_hardreset; 804 ata_postreset_fn_t pmp_postreset; 805 void (*error_handler)(struct ata_port *ap); 806 void (*lost_interrupt)(struct ata_port *ap); 807 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 808 809 /* 810 * Optional features 811 */ 812 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 813 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 814 void (*pmp_attach)(struct ata_port *ap); 815 void (*pmp_detach)(struct ata_port *ap); 816 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 817 void (*disable_pm)(struct ata_port *ap); 818 819 /* 820 * Start, stop, suspend and resume 821 */ 822 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 823 int (*port_resume)(struct ata_port *ap); 824 int (*port_start)(struct ata_port *ap); 825 void (*port_stop)(struct ata_port *ap); 826 void (*host_stop)(struct ata_host *host); 827 828#ifdef CONFIG_ATA_SFF 829 /* 830 * SFF / taskfile oriented ops 831 */ 832 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 833 u8 (*sff_check_status)(struct ata_port *ap); 834 u8 (*sff_check_altstatus)(struct ata_port *ap); 835 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 836 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 837 void (*sff_exec_command)(struct ata_port *ap, 838 const struct ata_taskfile *tf); 839 unsigned int (*sff_data_xfer)(struct ata_device *dev, 840 unsigned char *buf, unsigned int buflen, int rw); 841 u8 (*sff_irq_on)(struct ata_port *); 842 void (*sff_irq_clear)(struct ata_port *); 843 844 void (*bmdma_setup)(struct ata_queued_cmd *qc); 845 void (*bmdma_start)(struct ata_queued_cmd *qc); 846 void (*bmdma_stop)(struct ata_queued_cmd *qc); 847 u8 (*bmdma_status)(struct ata_port *ap); 848 849 void (*drain_fifo)(struct ata_queued_cmd *qc); 850#endif /* CONFIG_ATA_SFF */ 851 852 ssize_t (*em_show)(struct ata_port *ap, char *buf); 853 ssize_t (*em_store)(struct ata_port *ap, const char *message, 854 size_t size); 855 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 856 ssize_t (*sw_activity_store)(struct ata_device *dev, 857 enum sw_activity val); 858 /* 859 * Obsolete 860 */ 861 void (*phy_reset)(struct ata_port *ap); 862 void (*eng_timeout)(struct ata_port *ap); 863 864 /* 865 * ->inherits must be the last field and all the preceding 866 * fields must be pointers. 867 */ 868 const struct ata_port_operations *inherits; 869}; 870 871struct ata_port_info { 872 unsigned long flags; 873 unsigned long link_flags; 874 unsigned long pio_mask; 875 unsigned long mwdma_mask; 876 unsigned long udma_mask; 877 struct ata_port_operations *port_ops; 878 void *private_data; 879}; 880 881struct ata_timing { 882 unsigned short mode; /* ATA mode */ 883 unsigned short setup; /* t1 */ 884 unsigned short act8b; /* t2 for 8-bit I/O */ 885 unsigned short rec8b; /* t2i for 8-bit I/O */ 886 unsigned short cyc8b; /* t0 for 8-bit I/O */ 887 unsigned short active; /* t2 or tD */ 888 unsigned short recover; /* t2i or tK */ 889 unsigned short dmack_hold; /* tj */ 890 unsigned short cycle; /* t0 */ 891 unsigned short udma; /* t2CYCTYP/2 */ 892}; 893 894/* 895 * Core layer - drivers/ata/libata-core.c 896 */ 897extern const unsigned long sata_deb_timing_normal[]; 898extern const unsigned long sata_deb_timing_hotplug[]; 899extern const unsigned long sata_deb_timing_long[]; 900 901extern struct ata_port_operations ata_dummy_port_ops; 902extern const struct ata_port_info ata_dummy_port_info; 903 904static inline const unsigned long * 905sata_ehc_deb_timing(struct ata_eh_context *ehc) 906{ 907 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 908 return sata_deb_timing_hotplug; 909 else 910 return sata_deb_timing_normal; 911} 912 913static inline int ata_port_is_dummy(struct ata_port *ap) 914{ 915 return ap->ops == &ata_dummy_port_ops; 916} 917 918extern void ata_port_probe(struct ata_port *); 919extern int sata_set_spd(struct ata_link *link); 920extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 921extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 922 int (*check_ready)(struct ata_link *link)); 923extern int sata_link_debounce(struct ata_link *link, 924 const unsigned long *params, unsigned long deadline); 925extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 926 unsigned long deadline); 927extern int sata_link_hardreset(struct ata_link *link, 928 const unsigned long *timing, unsigned long deadline, 929 bool *online, int (*check_ready)(struct ata_link *)); 930extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 931 unsigned long deadline); 932extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 933extern void ata_port_disable(struct ata_port *); 934 935extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 936extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 937 const struct ata_port_info * const * ppi, int n_ports); 938extern int ata_slave_link_init(struct ata_port *ap); 939extern int ata_host_start(struct ata_host *host); 940extern int ata_host_register(struct ata_host *host, 941 struct scsi_host_template *sht); 942extern int ata_host_activate(struct ata_host *host, int irq, 943 irq_handler_t irq_handler, unsigned long irq_flags, 944 struct scsi_host_template *sht); 945extern void ata_host_detach(struct ata_host *host); 946extern void ata_host_init(struct ata_host *, struct device *, 947 unsigned long, struct ata_port_operations *); 948extern int ata_scsi_detect(struct scsi_host_template *sht); 949extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 950extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 951extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 952 int cmd, void __user *arg); 953extern void ata_sas_port_destroy(struct ata_port *); 954extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 955 struct ata_port_info *, struct Scsi_Host *); 956extern int ata_sas_port_init(struct ata_port *); 957extern int ata_sas_port_start(struct ata_port *ap); 958extern void ata_sas_port_stop(struct ata_port *ap); 959extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 960extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 961 struct ata_port *ap); 962extern int sata_scr_valid(struct ata_link *link); 963extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 964extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 965extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 966extern bool ata_link_online(struct ata_link *link); 967extern bool ata_link_offline(struct ata_link *link); 968#ifdef CONFIG_PM 969extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 970extern void ata_host_resume(struct ata_host *host); 971#endif 972extern int ata_ratelimit(void); 973extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 974 unsigned long interval, unsigned long timeout); 975extern int atapi_cmd_type(u8 opcode); 976extern void ata_tf_to_fis(const struct ata_taskfile *tf, 977 u8 pmp, int is_cmd, u8 *fis); 978extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 979extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 980 unsigned long mwdma_mask, unsigned long udma_mask); 981extern void ata_unpack_xfermask(unsigned long xfer_mask, 982 unsigned long *pio_mask, unsigned long *mwdma_mask, 983 unsigned long *udma_mask); 984extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 985extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 986extern int ata_xfer_mode2shift(unsigned long xfer_mode); 987extern const char *ata_mode_string(unsigned long xfer_mask); 988extern unsigned long ata_id_xfermask(const u16 *id); 989extern int ata_port_start(struct ata_port *ap); 990extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 991extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 992extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 993 unsigned int n_elem); 994extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 995extern void ata_dev_disable(struct ata_device *adev); 996extern void ata_id_string(const u16 *id, unsigned char *s, 997 unsigned int ofs, unsigned int len); 998extern void ata_id_c_string(const u16 *id, unsigned char *s, 999 unsigned int ofs, unsigned int len); 1000extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1001 struct ata_taskfile *tf, u16 *id); 1002extern void ata_qc_complete(struct ata_queued_cmd *qc); 1003extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 1004extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 1005 void (*done)(struct scsi_cmnd *)); 1006extern int ata_std_bios_param(struct scsi_device *sdev, 1007 struct block_device *bdev, 1008 sector_t capacity, int geom[]); 1009extern int ata_scsi_slave_config(struct scsi_device *sdev); 1010extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1011extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1012 int queue_depth); 1013extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1014extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1015 1016extern int ata_cable_40wire(struct ata_port *ap); 1017extern int ata_cable_80wire(struct ata_port *ap); 1018extern int ata_cable_sata(struct ata_port *ap); 1019extern int ata_cable_ignore(struct ata_port *ap); 1020extern int ata_cable_unknown(struct ata_port *ap); 1021 1022extern void ata_pio_queue_task(struct ata_port *ap, void *data, 1023 unsigned long delay); 1024 1025/* Timing helpers */ 1026extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1027extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1028extern int ata_timing_compute(struct ata_device *, unsigned short, 1029 struct ata_timing *, int, int); 1030extern void ata_timing_merge(const struct ata_timing *, 1031 const struct ata_timing *, struct ata_timing *, 1032 unsigned int); 1033extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1034 1035/* PCI */ 1036#ifdef CONFIG_PCI 1037struct pci_dev; 1038 1039struct pci_bits { 1040 unsigned int reg; /* PCI config register to read */ 1041 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1042 unsigned long mask; 1043 unsigned long val; 1044}; 1045 1046extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1047extern void ata_pci_remove_one(struct pci_dev *pdev); 1048 1049#ifdef CONFIG_PM 1050extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1051extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1052extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1053extern int ata_pci_device_resume(struct pci_dev *pdev); 1054#endif /* CONFIG_PM */ 1055#endif /* CONFIG_PCI */ 1056 1057/* 1058 * ACPI - drivers/ata/libata-acpi.c 1059 */ 1060#ifdef CONFIG_ATA_ACPI 1061static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1062{ 1063 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1064 return &ap->__acpi_init_gtm; 1065 return NULL; 1066} 1067int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1068int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1069unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1070 const struct ata_acpi_gtm *gtm); 1071int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1072#else 1073static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1074{ 1075 return NULL; 1076} 1077 1078static inline int ata_acpi_stm(const struct ata_port *ap, 1079 struct ata_acpi_gtm *stm) 1080{ 1081 return -ENOSYS; 1082} 1083 1084static inline int ata_acpi_gtm(const struct ata_port *ap, 1085 struct ata_acpi_gtm *stm) 1086{ 1087 return -ENOSYS; 1088} 1089 1090static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1091 const struct ata_acpi_gtm *gtm) 1092{ 1093 return 0; 1094} 1095 1096static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1097 const struct ata_acpi_gtm *gtm) 1098{ 1099 return 0; 1100} 1101#endif 1102 1103/* 1104 * EH - drivers/ata/libata-eh.c 1105 */ 1106extern void ata_port_schedule_eh(struct ata_port *ap); 1107extern int ata_link_abort(struct ata_link *link); 1108extern int ata_port_abort(struct ata_port *ap); 1109extern int ata_port_freeze(struct ata_port *ap); 1110extern int sata_async_notification(struct ata_port *ap); 1111 1112extern void ata_eh_freeze_port(struct ata_port *ap); 1113extern void ata_eh_thaw_port(struct ata_port *ap); 1114 1115extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1116extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1117extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1118 1119extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1120 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1121 ata_postreset_fn_t postreset); 1122extern void ata_std_error_handler(struct ata_port *ap); 1123 1124/* 1125 * Base operations to inherit from and initializers for sht 1126 * 1127 * Operations 1128 * 1129 * base : Common to all libata drivers. 1130 * sata : SATA controllers w/ native interface. 1131 * pmp : SATA controllers w/ PMP support. 1132 * sff : SFF ATA controllers w/o BMDMA support. 1133 * bmdma : SFF ATA controllers w/ BMDMA support. 1134 * 1135 * sht initializers 1136 * 1137 * BASE : Common to all libata drivers. The user must set 1138 * sg_tablesize and dma_boundary. 1139 * PIO : SFF ATA controllers w/ only PIO support. 1140 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1141 * dma_boundary are set to BMDMA limits. 1142 * NCQ : SATA controllers supporting NCQ. The user must set 1143 * sg_tablesize, dma_boundary and can_queue. 1144 */ 1145extern const struct ata_port_operations ata_base_port_ops; 1146extern const struct ata_port_operations sata_port_ops; 1147extern struct device_attribute *ata_common_sdev_attrs[]; 1148 1149#define ATA_BASE_SHT(drv_name) \ 1150 .module = THIS_MODULE, \ 1151 .name = drv_name, \ 1152 .ioctl = ata_scsi_ioctl, \ 1153 .queuecommand = ata_scsi_queuecmd, \ 1154 .can_queue = ATA_DEF_QUEUE, \ 1155 .this_id = ATA_SHT_THIS_ID, \ 1156 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1157 .emulated = ATA_SHT_EMULATED, \ 1158 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1159 .proc_name = drv_name, \ 1160 .slave_configure = ata_scsi_slave_config, \ 1161 .slave_destroy = ata_scsi_slave_destroy, \ 1162 .bios_param = ata_std_bios_param, \ 1163 .sdev_attrs = ata_common_sdev_attrs 1164 1165#define ATA_NCQ_SHT(drv_name) \ 1166 ATA_BASE_SHT(drv_name), \ 1167 .change_queue_depth = ata_scsi_change_queue_depth 1168 1169/* 1170 * PMP helpers 1171 */ 1172#ifdef CONFIG_SATA_PMP 1173static inline bool sata_pmp_supported(struct ata_port *ap) 1174{ 1175 return ap->flags & ATA_FLAG_PMP; 1176} 1177 1178static inline bool sata_pmp_attached(struct ata_port *ap) 1179{ 1180 return ap->nr_pmp_links != 0; 1181} 1182 1183static inline int ata_is_host_link(const struct ata_link *link) 1184{ 1185 return link == &link->ap->link || link == link->ap->slave_link; 1186} 1187#else /* CONFIG_SATA_PMP */ 1188static inline bool sata_pmp_supported(struct ata_port *ap) 1189{ 1190 return false; 1191} 1192 1193static inline bool sata_pmp_attached(struct ata_port *ap) 1194{ 1195 return false; 1196} 1197 1198static inline int ata_is_host_link(const struct ata_link *link) 1199{ 1200 return 1; 1201} 1202#endif /* CONFIG_SATA_PMP */ 1203 1204static inline int sata_srst_pmp(struct ata_link *link) 1205{ 1206 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1207 return SATA_PMP_CTRL_PORT; 1208 return link->pmp; 1209} 1210 1211/* 1212 * printk helpers 1213 */ 1214#define ata_port_printk(ap, lv, fmt, args...) \ 1215 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1216 1217#define ata_link_printk(link, lv, fmt, args...) do { \ 1218 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1219 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1220 (link)->pmp , ##args); \ 1221 else \ 1222 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1223 } while(0) 1224 1225#define ata_dev_printk(dev, lv, fmt, args...) \ 1226 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1227 (dev)->link->pmp + (dev)->devno , ##args) 1228 1229/* 1230 * ata_eh_info helpers 1231 */ 1232extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1233 __attribute__ ((format (printf, 2, 3))); 1234extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1235 __attribute__ ((format (printf, 2, 3))); 1236extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1237 1238static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1239{ 1240 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1241 ehi->flags |= ATA_EHI_HOTPLUGGED; 1242 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1243 ehi->err_mask |= AC_ERR_ATA_BUS; 1244} 1245 1246/* 1247 * port description helpers 1248 */ 1249extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1250 __attribute__ ((format (printf, 2, 3))); 1251#ifdef CONFIG_PCI 1252extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1253 const char *name); 1254#endif 1255 1256static inline unsigned int ata_tag_valid(unsigned int tag) 1257{ 1258 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1259} 1260 1261static inline unsigned int ata_tag_internal(unsigned int tag) 1262{ 1263 return tag == ATA_TAG_INTERNAL; 1264} 1265 1266/* 1267 * device helpers 1268 */ 1269static inline unsigned int ata_class_enabled(unsigned int class) 1270{ 1271 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1272 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1273} 1274 1275static inline unsigned int ata_class_disabled(unsigned int class) 1276{ 1277 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1278 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1279} 1280 1281static inline unsigned int ata_class_absent(unsigned int class) 1282{ 1283 return !ata_class_enabled(class) && !ata_class_disabled(class); 1284} 1285 1286static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1287{ 1288 return ata_class_enabled(dev->class); 1289} 1290 1291static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1292{ 1293 return ata_class_disabled(dev->class); 1294} 1295 1296static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1297{ 1298 return ata_class_absent(dev->class); 1299} 1300 1301/* 1302 * link helpers 1303 */ 1304static inline int ata_link_max_devices(const struct ata_link *link) 1305{ 1306 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1307 return 2; 1308 return 1; 1309} 1310 1311static inline int ata_link_active(struct ata_link *link) 1312{ 1313 return ata_tag_valid(link->active_tag) || link->sactive; 1314} 1315 1316/* 1317 * Iterators 1318 * 1319 * ATA_LITER_* constants are used to select link iteration mode and 1320 * ATA_DITER_* device iteration mode. 1321 * 1322 * For a custom iteration directly using ata_{link|dev}_next(), if 1323 * @link or @dev, respectively, is NULL, the first element is 1324 * returned. @dev and @link can be any valid device or link and the 1325 * next element according to the iteration mode will be returned. 1326 * After the last element, NULL is returned. 1327 */ 1328enum ata_link_iter_mode { 1329 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1330 * host link. no slave link */ 1331 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1332 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1333 * slave link still comes after host link */ 1334}; 1335 1336enum ata_dev_iter_mode { 1337 ATA_DITER_ENABLED, 1338 ATA_DITER_ENABLED_REVERSE, 1339 ATA_DITER_ALL, 1340 ATA_DITER_ALL_REVERSE, 1341}; 1342 1343extern struct ata_link *ata_link_next(struct ata_link *link, 1344 struct ata_port *ap, 1345 enum ata_link_iter_mode mode); 1346 1347extern struct ata_device *ata_dev_next(struct ata_device *dev, 1348 struct ata_link *link, 1349 enum ata_dev_iter_mode mode); 1350 1351/* 1352 * Shortcut notation for iterations 1353 * 1354 * ata_for_each_link() iterates over each link of @ap according to 1355 * @mode. @link points to the current link in the loop. @link is 1356 * NULL after loop termination. ata_for_each_dev() works the same way 1357 * except that it iterates over each device of @link. 1358 * 1359 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1360 * specified when using the following shorthand notations. Only the 1361 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1362 * specified. This not only increases brevity but also makes it 1363 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1364 */ 1365#define ata_for_each_link(link, ap, mode) \ 1366 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1367 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1368 1369#define ata_for_each_dev(dev, link, mode) \ 1370 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1371 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1372 1373/** 1374 * ata_ncq_enabled - Test whether NCQ is enabled 1375 * @dev: ATA device to test for 1376 * 1377 * LOCKING: 1378 * spin_lock_irqsave(host lock) 1379 * 1380 * RETURNS: 1381 * 1 if NCQ is enabled for @dev, 0 otherwise. 1382 */ 1383static inline int ata_ncq_enabled(struct ata_device *dev) 1384{ 1385 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1386 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1387} 1388 1389static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1390{ 1391 qc->tf.ctl |= ATA_NIEN; 1392} 1393 1394static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1395 unsigned int tag) 1396{ 1397 if (likely(ata_tag_valid(tag))) 1398 return &ap->qcmd[tag]; 1399 return NULL; 1400} 1401 1402static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1403 unsigned int tag) 1404{ 1405 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1406 1407 if (unlikely(!qc) || !ap->ops->error_handler) 1408 return qc; 1409 1410 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1411 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1412 return qc; 1413 1414 return NULL; 1415} 1416 1417static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1418{ 1419 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1420} 1421 1422static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1423{ 1424 memset(tf, 0, sizeof(*tf)); 1425 1426 tf->ctl = dev->link->ap->ctl; 1427 if (dev->devno == 0) 1428 tf->device = ATA_DEVICE_OBS; 1429 else 1430 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1431} 1432 1433static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1434{ 1435 qc->dma_dir = DMA_NONE; 1436 qc->sg = NULL; 1437 qc->flags = 0; 1438 qc->cursg = NULL; 1439 qc->cursg_ofs = 0; 1440 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1441 qc->n_elem = 0; 1442 qc->err_mask = 0; 1443 qc->sect_size = ATA_SECT_SIZE; 1444 1445 ata_tf_init(qc->dev, &qc->tf); 1446 1447 /* init result_tf such that it indicates normal completion */ 1448 qc->result_tf.command = ATA_DRDY; 1449 qc->result_tf.feature = 0; 1450} 1451 1452static inline int ata_try_flush_cache(const struct ata_device *dev) 1453{ 1454 return ata_id_wcache_enabled(dev->id) || 1455 ata_id_has_flush(dev->id) || 1456 ata_id_has_flush_ext(dev->id); 1457} 1458 1459static inline unsigned int ac_err_mask(u8 status) 1460{ 1461 if (status & (ATA_BUSY | ATA_DRQ)) 1462 return AC_ERR_HSM; 1463 if (status & (ATA_ERR | ATA_DF)) 1464 return AC_ERR_DEV; 1465 return 0; 1466} 1467 1468static inline unsigned int __ac_err_mask(u8 status) 1469{ 1470 unsigned int mask = ac_err_mask(status); 1471 if (mask == 0) 1472 return AC_ERR_OTHER; 1473 return mask; 1474} 1475 1476static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1477{ 1478 return *(struct ata_port **)&host->hostdata[0]; 1479} 1480 1481static inline int ata_check_ready(u8 status) 1482{ 1483 if (!(status & ATA_BUSY)) 1484 return 1; 1485 1486 /* 0xff indicates either no device or device not ready */ 1487 if (status == 0xff) 1488 return -ENODEV; 1489 1490 return 0; 1491} 1492 1493static inline unsigned long ata_deadline(unsigned long from_jiffies, 1494 unsigned long timeout_msecs) 1495{ 1496 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1497} 1498 1499/* Don't open code these in drivers as there are traps. Firstly the range may 1500 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1501 > UDMA_0. Dyma ddreigiau */ 1502 1503static inline int ata_using_mwdma(struct ata_device *adev) 1504{ 1505 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1506 return 1; 1507 return 0; 1508} 1509 1510static inline int ata_using_udma(struct ata_device *adev) 1511{ 1512 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1513 return 1; 1514 return 0; 1515} 1516 1517static inline int ata_dma_enabled(struct ata_device *adev) 1518{ 1519 return (adev->dma_mode == 0xFF ? 0 : 1); 1520} 1521 1522/************************************************************************** 1523 * PMP - drivers/ata/libata-pmp.c 1524 */ 1525#ifdef CONFIG_SATA_PMP 1526 1527extern const struct ata_port_operations sata_pmp_port_ops; 1528 1529extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1530extern void sata_pmp_error_handler(struct ata_port *ap); 1531 1532#else /* CONFIG_SATA_PMP */ 1533 1534#define sata_pmp_port_ops sata_port_ops 1535#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1536#define sata_pmp_error_handler ata_std_error_handler 1537 1538#endif /* CONFIG_SATA_PMP */ 1539 1540 1541/************************************************************************** 1542 * SFF - drivers/ata/libata-sff.c 1543 */ 1544#ifdef CONFIG_ATA_SFF 1545 1546extern const struct ata_port_operations ata_sff_port_ops; 1547extern const struct ata_port_operations ata_bmdma_port_ops; 1548extern const struct ata_port_operations ata_bmdma32_port_ops; 1549 1550/* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1551#define ATA_PIO_SHT(drv_name) \ 1552 ATA_BASE_SHT(drv_name), \ 1553 .sg_tablesize = LIBATA_MAX_PRD, \ 1554 .dma_boundary = ATA_DMA_BOUNDARY 1555 1556#define ATA_BMDMA_SHT(drv_name) \ 1557 ATA_BASE_SHT(drv_name), \ 1558 .sg_tablesize = LIBATA_MAX_PRD, \ 1559 .dma_boundary = ATA_DMA_BOUNDARY 1560 1561extern void ata_sff_qc_prep(struct ata_queued_cmd *qc); 1562extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc); 1563extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1564extern u8 ata_sff_check_status(struct ata_port *ap); 1565extern void ata_sff_pause(struct ata_port *ap); 1566extern void ata_sff_dma_pause(struct ata_port *ap); 1567extern int ata_sff_busy_sleep(struct ata_port *ap, 1568 unsigned long timeout_pat, unsigned long timeout); 1569extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1570extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1571extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1572extern void ata_sff_exec_command(struct ata_port *ap, 1573 const struct ata_taskfile *tf); 1574extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1575 unsigned char *buf, unsigned int buflen, int rw); 1576extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1577 unsigned char *buf, unsigned int buflen, int rw); 1578extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1579 unsigned char *buf, unsigned int buflen, int rw); 1580extern u8 ata_sff_irq_on(struct ata_port *ap); 1581extern void ata_sff_irq_clear(struct ata_port *ap); 1582extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1583 u8 status, int in_wq); 1584extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1585extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1586extern unsigned int ata_sff_host_intr(struct ata_port *ap, 1587 struct ata_queued_cmd *qc); 1588extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1589extern void ata_sff_lost_interrupt(struct ata_port *ap); 1590extern void ata_sff_freeze(struct ata_port *ap); 1591extern void ata_sff_thaw(struct ata_port *ap); 1592extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1593extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1594 u8 *r_err); 1595extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1596 unsigned long deadline); 1597extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1598 unsigned long deadline); 1599extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1600 unsigned long deadline); 1601extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1602extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1603extern void ata_sff_error_handler(struct ata_port *ap); 1604extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc); 1605extern int ata_sff_port_start(struct ata_port *ap); 1606extern int ata_sff_port_start32(struct ata_port *ap); 1607extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1608extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev, 1609 unsigned long xfer_mask); 1610extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1611extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1612extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1613extern u8 ata_bmdma_status(struct ata_port *ap); 1614extern void ata_bus_reset(struct ata_port *ap); 1615 1616#ifdef CONFIG_PCI 1617extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1618extern int ata_pci_bmdma_init(struct ata_host *host); 1619extern int ata_pci_sff_init_host(struct ata_host *host); 1620extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1621 const struct ata_port_info * const * ppi, 1622 struct ata_host **r_host); 1623extern int ata_pci_sff_activate_host(struct ata_host *host, 1624 irq_handler_t irq_handler, 1625 struct scsi_host_template *sht); 1626extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1627 const struct ata_port_info * const * ppi, 1628 struct scsi_host_template *sht, void *host_priv); 1629#endif /* CONFIG_PCI */ 1630 1631/** 1632 * ata_sff_busy_wait - Wait for a port status register 1633 * @ap: Port to wait for. 1634 * @bits: bits that must be clear 1635 * @max: number of 10uS waits to perform 1636 * 1637 * Waits up to max*10 microseconds for the selected bits in the port's 1638 * status register to be cleared. 1639 * Returns final value of status register. 1640 * 1641 * LOCKING: 1642 * Inherited from caller. 1643 */ 1644static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1645 unsigned int max) 1646{ 1647 u8 status; 1648 1649 do { 1650 udelay(10); 1651 status = ap->ops->sff_check_status(ap); 1652 max--; 1653 } while (status != 0xff && (status & bits) && (max > 0)); 1654 1655 return status; 1656} 1657 1658/** 1659 * ata_wait_idle - Wait for a port to be idle. 1660 * @ap: Port to wait for. 1661 * 1662 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1663 * Returns final value of status register. 1664 * 1665 * LOCKING: 1666 * Inherited from caller. 1667 */ 1668static inline u8 ata_wait_idle(struct ata_port *ap) 1669{ 1670 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1671 1672#ifdef ATA_DEBUG 1673 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1674 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1675 status); 1676#endif 1677 1678 return status; 1679} 1680#endif /* CONFIG_ATA_SFF */ 1681 1682#endif /* __LINUX_LIBATA_H__ */ 1683