libata.h revision e3cf95dd6d352954b663d2934110d6e30af2406d
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 */ 388 389 /* DMA mask for user DMA control: User visible values; DO NOT 390 renumber */ 391 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 392 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 393 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 394 395 /* ATAPI command types */ 396 ATAPI_READ = 0, /* READs */ 397 ATAPI_WRITE = 1, /* WRITEs */ 398 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 399 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 400 ATAPI_MISC = 4, /* the rest */ 401 402 /* Timing constants */ 403 ATA_TIMING_SETUP = (1 << 0), 404 ATA_TIMING_ACT8B = (1 << 1), 405 ATA_TIMING_REC8B = (1 << 2), 406 ATA_TIMING_CYC8B = (1 << 3), 407 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 408 ATA_TIMING_CYC8B, 409 ATA_TIMING_ACTIVE = (1 << 4), 410 ATA_TIMING_RECOVER = (1 << 5), 411 ATA_TIMING_DMACK_HOLD = (1 << 6), 412 ATA_TIMING_CYCLE = (1 << 7), 413 ATA_TIMING_UDMA = (1 << 8), 414 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 415 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 416 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 417 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 418 ATA_TIMING_UDMA, 419}; 420 421enum ata_xfer_mask { 422 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 423 << ATA_SHIFT_PIO, 424 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 425 << ATA_SHIFT_MWDMA, 426 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 427 << ATA_SHIFT_UDMA, 428}; 429 430enum hsm_task_states { 431 HSM_ST_IDLE, /* no command on going */ 432 HSM_ST_FIRST, /* (waiting the device to) 433 write CDB or first data block */ 434 HSM_ST, /* (waiting the device to) transfer data */ 435 HSM_ST_LAST, /* (waiting the device to) complete command */ 436 HSM_ST_ERR, /* error */ 437}; 438 439enum ata_completion_errors { 440 AC_ERR_DEV = (1 << 0), /* device reported error */ 441 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 442 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 443 AC_ERR_MEDIA = (1 << 3), /* media error */ 444 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 445 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 446 AC_ERR_SYSTEM = (1 << 6), /* system error */ 447 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 448 AC_ERR_OTHER = (1 << 8), /* unknown */ 449 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 450 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 451}; 452 453/* forward declarations */ 454struct scsi_device; 455struct ata_port_operations; 456struct ata_port; 457struct ata_link; 458struct ata_queued_cmd; 459 460/* typedefs */ 461typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 462typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 463typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 464 unsigned long deadline); 465typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 466 467/* 468 * host pm policy: If you alter this, you also need to alter libata-scsi.c 469 * (for the ascii descriptions) 470 */ 471enum link_pm { 472 NOT_AVAILABLE, 473 MIN_POWER, 474 MAX_PERFORMANCE, 475 MEDIUM_POWER, 476}; 477extern struct device_attribute dev_attr_link_power_management_policy; 478extern struct device_attribute dev_attr_unload_heads; 479extern struct device_attribute dev_attr_em_message_type; 480extern struct device_attribute dev_attr_em_message; 481extern struct device_attribute dev_attr_sw_activity; 482 483enum sw_activity { 484 OFF, 485 BLINK_ON, 486 BLINK_OFF, 487}; 488 489#ifdef CONFIG_ATA_SFF 490struct ata_ioports { 491 void __iomem *cmd_addr; 492 void __iomem *data_addr; 493 void __iomem *error_addr; 494 void __iomem *feature_addr; 495 void __iomem *nsect_addr; 496 void __iomem *lbal_addr; 497 void __iomem *lbam_addr; 498 void __iomem *lbah_addr; 499 void __iomem *device_addr; 500 void __iomem *status_addr; 501 void __iomem *command_addr; 502 void __iomem *altstatus_addr; 503 void __iomem *ctl_addr; 504 void __iomem *bmdma_addr; 505 void __iomem *scr_addr; 506}; 507#endif /* CONFIG_ATA_SFF */ 508 509struct ata_host { 510 spinlock_t lock; 511 struct device *dev; 512 void __iomem * const *iomap; 513 unsigned int n_ports; 514 void *private_data; 515 struct ata_port_operations *ops; 516 unsigned long flags; 517#ifdef CONFIG_ATA_ACPI 518 acpi_handle acpi_handle; 519#endif 520 struct ata_port *simplex_claimed; /* channel owning the DMA */ 521 struct ata_port *ports[0]; 522}; 523 524struct ata_queued_cmd { 525 struct ata_port *ap; 526 struct ata_device *dev; 527 528 struct scsi_cmnd *scsicmd; 529 void (*scsidone)(struct scsi_cmnd *); 530 531 struct ata_taskfile tf; 532 u8 cdb[ATAPI_CDB_LEN]; 533 534 unsigned long flags; /* ATA_QCFLAG_xxx */ 535 unsigned int tag; 536 unsigned int n_elem; 537 unsigned int orig_n_elem; 538 539 int dma_dir; 540 541 unsigned int sect_size; 542 543 unsigned int nbytes; 544 unsigned int extrabytes; 545 unsigned int curbytes; 546 547 struct scatterlist *cursg; 548 unsigned int cursg_ofs; 549 550 struct scatterlist sgent; 551 552 struct scatterlist *sg; 553 554 unsigned int err_mask; 555 struct ata_taskfile result_tf; 556 ata_qc_cb_t complete_fn; 557 558 void *private_data; 559 void *lldd_task; 560}; 561 562struct ata_port_stats { 563 unsigned long unhandled_irq; 564 unsigned long idle_irq; 565 unsigned long rw_reqbuf; 566}; 567 568struct ata_ering_entry { 569 unsigned int eflags; 570 unsigned int err_mask; 571 u64 timestamp; 572}; 573 574struct ata_ering { 575 int cursor; 576 struct ata_ering_entry ring[ATA_ERING_SIZE]; 577}; 578 579struct ata_device { 580 struct ata_link *link; 581 unsigned int devno; /* 0 or 1 */ 582 unsigned int horkage; /* List of broken features */ 583 unsigned long flags; /* ATA_DFLAG_xxx */ 584 struct scsi_device *sdev; /* attached SCSI device */ 585#ifdef CONFIG_ATA_ACPI 586 acpi_handle acpi_handle; 587 union acpi_object *gtf_cache; 588#endif 589 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 590 u64 n_sectors; /* size of device, if ATA */ 591 unsigned int class; /* ATA_DEV_xxx */ 592 unsigned long unpark_deadline; 593 594 u8 pio_mode; 595 u8 dma_mode; 596 u8 xfer_mode; 597 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 598 599 unsigned int multi_count; /* sectors count for 600 READ/WRITE MULTIPLE */ 601 unsigned int max_sectors; /* per-device max sectors */ 602 unsigned int cdb_len; 603 604 /* per-dev xfer mask */ 605 unsigned long pio_mask; 606 unsigned long mwdma_mask; 607 unsigned long udma_mask; 608 609 /* for CHS addressing */ 610 u16 cylinders; /* Number of cylinders */ 611 u16 heads; /* Number of heads */ 612 u16 sectors; /* Number of sectors per track */ 613 614 union { 615 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 616 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 617 }; 618 619 /* error history */ 620 int spdn_cnt; 621 /* ering is CLEAR_END, read comment above CLEAR_END */ 622 struct ata_ering ering; 623}; 624 625/* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 626 * cleared to zero on ata_dev_init(). 627 */ 628#define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 629#define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 630 631struct ata_eh_info { 632 struct ata_device *dev; /* offending device */ 633 u32 serror; /* SError from LLDD */ 634 unsigned int err_mask; /* port-wide err_mask */ 635 unsigned int action; /* ATA_EH_* action mask */ 636 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 637 unsigned int flags; /* ATA_EHI_* flags */ 638 639 unsigned int probe_mask; 640 641 char desc[ATA_EH_DESC_LEN]; 642 int desc_len; 643}; 644 645struct ata_eh_context { 646 struct ata_eh_info i; 647 int tries[ATA_MAX_DEVICES]; 648 int cmd_timeout_idx[ATA_MAX_DEVICES] 649 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 650 unsigned int classes[ATA_MAX_DEVICES]; 651 unsigned int did_probe_mask; 652 unsigned int unloaded_mask; 653 unsigned int saved_ncq_enabled; 654 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 655 /* timestamp for the last reset attempt or success */ 656 unsigned long last_reset; 657}; 658 659struct ata_acpi_drive 660{ 661 u32 pio; 662 u32 dma; 663} __packed; 664 665struct ata_acpi_gtm { 666 struct ata_acpi_drive drive[2]; 667 u32 flags; 668} __packed; 669 670struct ata_link { 671 struct ata_port *ap; 672 int pmp; /* port multiplier port # */ 673 674 unsigned int active_tag; /* active tag on this link */ 675 u32 sactive; /* active NCQ commands */ 676 677 unsigned int flags; /* ATA_LFLAG_xxx */ 678 679 u32 saved_scontrol; /* SControl on probe */ 680 unsigned int hw_sata_spd_limit; 681 unsigned int sata_spd_limit; 682 unsigned int sata_spd; /* current SATA PHY speed */ 683 684 /* record runtime error info, protected by host_set lock */ 685 struct ata_eh_info eh_info; 686 /* EH context */ 687 struct ata_eh_context eh_context; 688 689 struct ata_device device[ATA_MAX_DEVICES]; 690}; 691 692struct ata_port { 693 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 694 struct ata_port_operations *ops; 695 spinlock_t *lock; 696 /* Flags owned by the EH context. Only EH should touch these once the 697 port is active */ 698 unsigned long flags; /* ATA_FLAG_xxx */ 699 /* Flags that change dynamically, protected by ap->lock */ 700 unsigned int pflags; /* ATA_PFLAG_xxx */ 701 unsigned int print_id; /* user visible unique port ID */ 702 unsigned int port_no; /* 0 based port no. inside the host */ 703 704 struct ata_prd *prd; /* our SG list */ 705 dma_addr_t prd_dma; /* and its DMA mapping */ 706 707#ifdef CONFIG_ATA_SFF 708 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 709#endif /* CONFIG_ATA_SFF */ 710 711 u8 ctl; /* cache of ATA control register */ 712 u8 last_ctl; /* Cache last written value */ 713 unsigned int pio_mask; 714 unsigned int mwdma_mask; 715 unsigned int udma_mask; 716 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 717 718 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 719 unsigned long qc_allocated; 720 unsigned int qc_active; 721 int nr_active_links; /* #links with active qcs */ 722 723 struct ata_link link; /* host default link */ 724 struct ata_link *slave_link; /* see ata_slave_link_init() */ 725 726 int nr_pmp_links; /* nr of available PMP links */ 727 struct ata_link *pmp_link; /* array of PMP links */ 728 struct ata_link *excl_link; /* for PMP qc exclusion */ 729 730 struct ata_port_stats stats; 731 struct ata_host *host; 732 struct device *dev; 733 734 void *port_task_data; 735 struct delayed_work port_task; 736 struct delayed_work hotplug_task; 737 struct work_struct scsi_rescan_task; 738 739 unsigned int hsm_task_state; 740 741 u32 msg_enable; 742 struct list_head eh_done_q; 743 wait_queue_head_t eh_wait_q; 744 int eh_tries; 745 struct completion park_req_pending; 746 747 pm_message_t pm_mesg; 748 int *pm_result; 749 enum link_pm pm_policy; 750 751 struct timer_list fastdrain_timer; 752 unsigned long fastdrain_cnt; 753 754 int em_message_type; 755 void *private_data; 756 757#ifdef CONFIG_ATA_ACPI 758 acpi_handle acpi_handle; 759 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 760#endif 761 /* owned by EH */ 762 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 763}; 764 765/* The following initializer overrides a method to NULL whether one of 766 * its parent has the method defined or not. This is equivalent to 767 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 768 * expression and thus can't be used as an initializer. 769 */ 770#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 771 772struct ata_port_operations { 773 /* 774 * Command execution 775 */ 776 int (*qc_defer)(struct ata_queued_cmd *qc); 777 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 778 void (*qc_prep)(struct ata_queued_cmd *qc); 779 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 780 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 781 782 /* 783 * Configuration and exception handling 784 */ 785 int (*cable_detect)(struct ata_port *ap); 786 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 787 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 788 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 789 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 790 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 791 792 void (*dev_config)(struct ata_device *dev); 793 794 void (*freeze)(struct ata_port *ap); 795 void (*thaw)(struct ata_port *ap); 796 ata_prereset_fn_t prereset; 797 ata_reset_fn_t softreset; 798 ata_reset_fn_t hardreset; 799 ata_postreset_fn_t postreset; 800 ata_prereset_fn_t pmp_prereset; 801 ata_reset_fn_t pmp_softreset; 802 ata_reset_fn_t pmp_hardreset; 803 ata_postreset_fn_t pmp_postreset; 804 void (*error_handler)(struct ata_port *ap); 805 void (*lost_interrupt)(struct ata_port *ap); 806 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 807 808 /* 809 * Optional features 810 */ 811 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 812 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 813 void (*pmp_attach)(struct ata_port *ap); 814 void (*pmp_detach)(struct ata_port *ap); 815 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 816 void (*disable_pm)(struct ata_port *ap); 817 818 /* 819 * Start, stop, suspend and resume 820 */ 821 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 822 int (*port_resume)(struct ata_port *ap); 823 int (*port_start)(struct ata_port *ap); 824 void (*port_stop)(struct ata_port *ap); 825 void (*host_stop)(struct ata_host *host); 826 827#ifdef CONFIG_ATA_SFF 828 /* 829 * SFF / taskfile oriented ops 830 */ 831 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 832 u8 (*sff_check_status)(struct ata_port *ap); 833 u8 (*sff_check_altstatus)(struct ata_port *ap); 834 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 835 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 836 void (*sff_exec_command)(struct ata_port *ap, 837 const struct ata_taskfile *tf); 838 unsigned int (*sff_data_xfer)(struct ata_device *dev, 839 unsigned char *buf, unsigned int buflen, int rw); 840 u8 (*sff_irq_on)(struct ata_port *); 841 void (*sff_irq_clear)(struct ata_port *); 842 843 void (*bmdma_setup)(struct ata_queued_cmd *qc); 844 void (*bmdma_start)(struct ata_queued_cmd *qc); 845 void (*bmdma_stop)(struct ata_queued_cmd *qc); 846 u8 (*bmdma_status)(struct ata_port *ap); 847 848 void (*drain_fifo)(struct ata_queued_cmd *qc); 849#endif /* CONFIG_ATA_SFF */ 850 851 ssize_t (*em_show)(struct ata_port *ap, char *buf); 852 ssize_t (*em_store)(struct ata_port *ap, const char *message, 853 size_t size); 854 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 855 ssize_t (*sw_activity_store)(struct ata_device *dev, 856 enum sw_activity val); 857 /* 858 * Obsolete 859 */ 860 void (*phy_reset)(struct ata_port *ap); 861 void (*eng_timeout)(struct ata_port *ap); 862 863 /* 864 * ->inherits must be the last field and all the preceding 865 * fields must be pointers. 866 */ 867 const struct ata_port_operations *inherits; 868}; 869 870struct ata_port_info { 871 unsigned long flags; 872 unsigned long link_flags; 873 unsigned long pio_mask; 874 unsigned long mwdma_mask; 875 unsigned long udma_mask; 876 struct ata_port_operations *port_ops; 877 void *private_data; 878}; 879 880struct ata_timing { 881 unsigned short mode; /* ATA mode */ 882 unsigned short setup; /* t1 */ 883 unsigned short act8b; /* t2 for 8-bit I/O */ 884 unsigned short rec8b; /* t2i for 8-bit I/O */ 885 unsigned short cyc8b; /* t0 for 8-bit I/O */ 886 unsigned short active; /* t2 or tD */ 887 unsigned short recover; /* t2i or tK */ 888 unsigned short dmack_hold; /* tj */ 889 unsigned short cycle; /* t0 */ 890 unsigned short udma; /* t2CYCTYP/2 */ 891}; 892 893/* 894 * Core layer - drivers/ata/libata-core.c 895 */ 896extern const unsigned long sata_deb_timing_normal[]; 897extern const unsigned long sata_deb_timing_hotplug[]; 898extern const unsigned long sata_deb_timing_long[]; 899 900extern struct ata_port_operations ata_dummy_port_ops; 901extern const struct ata_port_info ata_dummy_port_info; 902 903static inline const unsigned long * 904sata_ehc_deb_timing(struct ata_eh_context *ehc) 905{ 906 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 907 return sata_deb_timing_hotplug; 908 else 909 return sata_deb_timing_normal; 910} 911 912static inline int ata_port_is_dummy(struct ata_port *ap) 913{ 914 return ap->ops == &ata_dummy_port_ops; 915} 916 917extern void ata_port_probe(struct ata_port *); 918extern int sata_set_spd(struct ata_link *link); 919extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 920extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 921 int (*check_ready)(struct ata_link *link)); 922extern int sata_link_debounce(struct ata_link *link, 923 const unsigned long *params, unsigned long deadline); 924extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 925 unsigned long deadline); 926extern int sata_link_hardreset(struct ata_link *link, 927 const unsigned long *timing, unsigned long deadline, 928 bool *online, int (*check_ready)(struct ata_link *)); 929extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 930 unsigned long deadline); 931extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 932extern void ata_port_disable(struct ata_port *); 933 934extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 935extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 936 const struct ata_port_info * const * ppi, int n_ports); 937extern int ata_slave_link_init(struct ata_port *ap); 938extern int ata_host_start(struct ata_host *host); 939extern int ata_host_register(struct ata_host *host, 940 struct scsi_host_template *sht); 941extern int ata_host_activate(struct ata_host *host, int irq, 942 irq_handler_t irq_handler, unsigned long irq_flags, 943 struct scsi_host_template *sht); 944extern void ata_host_detach(struct ata_host *host); 945extern void ata_host_init(struct ata_host *, struct device *, 946 unsigned long, struct ata_port_operations *); 947extern int ata_scsi_detect(struct scsi_host_template *sht); 948extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 949extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 950extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 951 int cmd, void __user *arg); 952extern void ata_sas_port_destroy(struct ata_port *); 953extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 954 struct ata_port_info *, struct Scsi_Host *); 955extern int ata_sas_port_init(struct ata_port *); 956extern int ata_sas_port_start(struct ata_port *ap); 957extern void ata_sas_port_stop(struct ata_port *ap); 958extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 959extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 960 struct ata_port *ap); 961extern int sata_scr_valid(struct ata_link *link); 962extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 963extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 964extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 965extern bool ata_link_online(struct ata_link *link); 966extern bool ata_link_offline(struct ata_link *link); 967#ifdef CONFIG_PM 968extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 969extern void ata_host_resume(struct ata_host *host); 970#endif 971extern int ata_ratelimit(void); 972extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 973 unsigned long interval, unsigned long timeout); 974extern int atapi_cmd_type(u8 opcode); 975extern void ata_tf_to_fis(const struct ata_taskfile *tf, 976 u8 pmp, int is_cmd, u8 *fis); 977extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 978extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 979 unsigned long mwdma_mask, unsigned long udma_mask); 980extern void ata_unpack_xfermask(unsigned long xfer_mask, 981 unsigned long *pio_mask, unsigned long *mwdma_mask, 982 unsigned long *udma_mask); 983extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 984extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 985extern int ata_xfer_mode2shift(unsigned long xfer_mode); 986extern const char *ata_mode_string(unsigned long xfer_mask); 987extern unsigned long ata_id_xfermask(const u16 *id); 988extern int ata_port_start(struct ata_port *ap); 989extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 990extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 991extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 992 unsigned int n_elem); 993extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 994extern void ata_dev_disable(struct ata_device *adev); 995extern void ata_id_string(const u16 *id, unsigned char *s, 996 unsigned int ofs, unsigned int len); 997extern void ata_id_c_string(const u16 *id, unsigned char *s, 998 unsigned int ofs, unsigned int len); 999extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1000 struct ata_taskfile *tf, u16 *id); 1001extern void ata_qc_complete(struct ata_queued_cmd *qc); 1002extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 1003extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 1004 void (*done)(struct scsi_cmnd *)); 1005extern int ata_std_bios_param(struct scsi_device *sdev, 1006 struct block_device *bdev, 1007 sector_t capacity, int geom[]); 1008extern int ata_scsi_slave_config(struct scsi_device *sdev); 1009extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1010extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1011 int queue_depth); 1012extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1013extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1014 1015extern int ata_cable_40wire(struct ata_port *ap); 1016extern int ata_cable_80wire(struct ata_port *ap); 1017extern int ata_cable_sata(struct ata_port *ap); 1018extern int ata_cable_ignore(struct ata_port *ap); 1019extern int ata_cable_unknown(struct ata_port *ap); 1020 1021extern void ata_pio_queue_task(struct ata_port *ap, void *data, 1022 unsigned long delay); 1023 1024/* Timing helpers */ 1025extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1026extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1027extern int ata_timing_compute(struct ata_device *, unsigned short, 1028 struct ata_timing *, int, int); 1029extern void ata_timing_merge(const struct ata_timing *, 1030 const struct ata_timing *, struct ata_timing *, 1031 unsigned int); 1032extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1033 1034/* PCI */ 1035#ifdef CONFIG_PCI 1036struct pci_dev; 1037 1038struct pci_bits { 1039 unsigned int reg; /* PCI config register to read */ 1040 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1041 unsigned long mask; 1042 unsigned long val; 1043}; 1044 1045extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1046extern void ata_pci_remove_one(struct pci_dev *pdev); 1047 1048#ifdef CONFIG_PM 1049extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1050extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1051extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1052extern int ata_pci_device_resume(struct pci_dev *pdev); 1053#endif /* CONFIG_PM */ 1054#endif /* CONFIG_PCI */ 1055 1056/* 1057 * ACPI - drivers/ata/libata-acpi.c 1058 */ 1059#ifdef CONFIG_ATA_ACPI 1060static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1061{ 1062 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1063 return &ap->__acpi_init_gtm; 1064 return NULL; 1065} 1066int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1067int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1068unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1069 const struct ata_acpi_gtm *gtm); 1070int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1071#else 1072static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1073{ 1074 return NULL; 1075} 1076 1077static inline int ata_acpi_stm(const struct ata_port *ap, 1078 struct ata_acpi_gtm *stm) 1079{ 1080 return -ENOSYS; 1081} 1082 1083static inline int ata_acpi_gtm(const struct ata_port *ap, 1084 struct ata_acpi_gtm *stm) 1085{ 1086 return -ENOSYS; 1087} 1088 1089static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1090 const struct ata_acpi_gtm *gtm) 1091{ 1092 return 0; 1093} 1094 1095static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1096 const struct ata_acpi_gtm *gtm) 1097{ 1098 return 0; 1099} 1100#endif 1101 1102/* 1103 * EH - drivers/ata/libata-eh.c 1104 */ 1105extern void ata_port_schedule_eh(struct ata_port *ap); 1106extern int ata_link_abort(struct ata_link *link); 1107extern int ata_port_abort(struct ata_port *ap); 1108extern int ata_port_freeze(struct ata_port *ap); 1109extern int sata_async_notification(struct ata_port *ap); 1110 1111extern void ata_eh_freeze_port(struct ata_port *ap); 1112extern void ata_eh_thaw_port(struct ata_port *ap); 1113 1114extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1115extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1116extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1117 1118extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1119 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1120 ata_postreset_fn_t postreset); 1121extern void ata_std_error_handler(struct ata_port *ap); 1122 1123/* 1124 * Base operations to inherit from and initializers for sht 1125 * 1126 * Operations 1127 * 1128 * base : Common to all libata drivers. 1129 * sata : SATA controllers w/ native interface. 1130 * pmp : SATA controllers w/ PMP support. 1131 * sff : SFF ATA controllers w/o BMDMA support. 1132 * bmdma : SFF ATA controllers w/ BMDMA support. 1133 * 1134 * sht initializers 1135 * 1136 * BASE : Common to all libata drivers. The user must set 1137 * sg_tablesize and dma_boundary. 1138 * PIO : SFF ATA controllers w/ only PIO support. 1139 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1140 * dma_boundary are set to BMDMA limits. 1141 * NCQ : SATA controllers supporting NCQ. The user must set 1142 * sg_tablesize, dma_boundary and can_queue. 1143 */ 1144extern const struct ata_port_operations ata_base_port_ops; 1145extern const struct ata_port_operations sata_port_ops; 1146extern struct device_attribute *ata_common_sdev_attrs[]; 1147 1148#define ATA_BASE_SHT(drv_name) \ 1149 .module = THIS_MODULE, \ 1150 .name = drv_name, \ 1151 .ioctl = ata_scsi_ioctl, \ 1152 .queuecommand = ata_scsi_queuecmd, \ 1153 .can_queue = ATA_DEF_QUEUE, \ 1154 .this_id = ATA_SHT_THIS_ID, \ 1155 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1156 .emulated = ATA_SHT_EMULATED, \ 1157 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1158 .proc_name = drv_name, \ 1159 .slave_configure = ata_scsi_slave_config, \ 1160 .slave_destroy = ata_scsi_slave_destroy, \ 1161 .bios_param = ata_std_bios_param, \ 1162 .sdev_attrs = ata_common_sdev_attrs 1163 1164#define ATA_NCQ_SHT(drv_name) \ 1165 ATA_BASE_SHT(drv_name), \ 1166 .change_queue_depth = ata_scsi_change_queue_depth 1167 1168/* 1169 * PMP helpers 1170 */ 1171#ifdef CONFIG_SATA_PMP 1172static inline bool sata_pmp_supported(struct ata_port *ap) 1173{ 1174 return ap->flags & ATA_FLAG_PMP; 1175} 1176 1177static inline bool sata_pmp_attached(struct ata_port *ap) 1178{ 1179 return ap->nr_pmp_links != 0; 1180} 1181 1182static inline int ata_is_host_link(const struct ata_link *link) 1183{ 1184 return link == &link->ap->link || link == link->ap->slave_link; 1185} 1186#else /* CONFIG_SATA_PMP */ 1187static inline bool sata_pmp_supported(struct ata_port *ap) 1188{ 1189 return false; 1190} 1191 1192static inline bool sata_pmp_attached(struct ata_port *ap) 1193{ 1194 return false; 1195} 1196 1197static inline int ata_is_host_link(const struct ata_link *link) 1198{ 1199 return 1; 1200} 1201#endif /* CONFIG_SATA_PMP */ 1202 1203static inline int sata_srst_pmp(struct ata_link *link) 1204{ 1205 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1206 return SATA_PMP_CTRL_PORT; 1207 return link->pmp; 1208} 1209 1210/* 1211 * printk helpers 1212 */ 1213#define ata_port_printk(ap, lv, fmt, args...) \ 1214 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1215 1216#define ata_link_printk(link, lv, fmt, args...) do { \ 1217 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1218 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1219 (link)->pmp , ##args); \ 1220 else \ 1221 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1222 } while(0) 1223 1224#define ata_dev_printk(dev, lv, fmt, args...) \ 1225 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1226 (dev)->link->pmp + (dev)->devno , ##args) 1227 1228/* 1229 * ata_eh_info helpers 1230 */ 1231extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1232 __attribute__ ((format (printf, 2, 3))); 1233extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1234 __attribute__ ((format (printf, 2, 3))); 1235extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1236 1237static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1238{ 1239 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1240 ehi->flags |= ATA_EHI_HOTPLUGGED; 1241 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1242 ehi->err_mask |= AC_ERR_ATA_BUS; 1243} 1244 1245/* 1246 * port description helpers 1247 */ 1248extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1249 __attribute__ ((format (printf, 2, 3))); 1250#ifdef CONFIG_PCI 1251extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1252 const char *name); 1253#endif 1254 1255static inline unsigned int ata_tag_valid(unsigned int tag) 1256{ 1257 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1258} 1259 1260static inline unsigned int ata_tag_internal(unsigned int tag) 1261{ 1262 return tag == ATA_TAG_INTERNAL; 1263} 1264 1265/* 1266 * device helpers 1267 */ 1268static inline unsigned int ata_class_enabled(unsigned int class) 1269{ 1270 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1271 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1272} 1273 1274static inline unsigned int ata_class_disabled(unsigned int class) 1275{ 1276 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1277 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1278} 1279 1280static inline unsigned int ata_class_absent(unsigned int class) 1281{ 1282 return !ata_class_enabled(class) && !ata_class_disabled(class); 1283} 1284 1285static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1286{ 1287 return ata_class_enabled(dev->class); 1288} 1289 1290static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1291{ 1292 return ata_class_disabled(dev->class); 1293} 1294 1295static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1296{ 1297 return ata_class_absent(dev->class); 1298} 1299 1300/* 1301 * link helpers 1302 */ 1303static inline int ata_link_max_devices(const struct ata_link *link) 1304{ 1305 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1306 return 2; 1307 return 1; 1308} 1309 1310static inline int ata_link_active(struct ata_link *link) 1311{ 1312 return ata_tag_valid(link->active_tag) || link->sactive; 1313} 1314 1315/* 1316 * Iterators 1317 * 1318 * ATA_LITER_* constants are used to select link iteration mode and 1319 * ATA_DITER_* device iteration mode. 1320 * 1321 * For a custom iteration directly using ata_{link|dev}_next(), if 1322 * @link or @dev, respectively, is NULL, the first element is 1323 * returned. @dev and @link can be any valid device or link and the 1324 * next element according to the iteration mode will be returned. 1325 * After the last element, NULL is returned. 1326 */ 1327enum ata_link_iter_mode { 1328 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1329 * host link. no slave link */ 1330 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1331 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1332 * slave link still comes after host link */ 1333}; 1334 1335enum ata_dev_iter_mode { 1336 ATA_DITER_ENABLED, 1337 ATA_DITER_ENABLED_REVERSE, 1338 ATA_DITER_ALL, 1339 ATA_DITER_ALL_REVERSE, 1340}; 1341 1342extern struct ata_link *ata_link_next(struct ata_link *link, 1343 struct ata_port *ap, 1344 enum ata_link_iter_mode mode); 1345 1346extern struct ata_device *ata_dev_next(struct ata_device *dev, 1347 struct ata_link *link, 1348 enum ata_dev_iter_mode mode); 1349 1350/* 1351 * Shortcut notation for iterations 1352 * 1353 * ata_for_each_link() iterates over each link of @ap according to 1354 * @mode. @link points to the current link in the loop. @link is 1355 * NULL after loop termination. ata_for_each_dev() works the same way 1356 * except that it iterates over each device of @link. 1357 * 1358 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1359 * specified when using the following shorthand notations. Only the 1360 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1361 * specified. This not only increases brevity but also makes it 1362 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1363 */ 1364#define ata_for_each_link(link, ap, mode) \ 1365 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1366 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1367 1368#define ata_for_each_dev(dev, link, mode) \ 1369 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1370 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1371 1372/** 1373 * ata_ncq_enabled - Test whether NCQ is enabled 1374 * @dev: ATA device to test for 1375 * 1376 * LOCKING: 1377 * spin_lock_irqsave(host lock) 1378 * 1379 * RETURNS: 1380 * 1 if NCQ is enabled for @dev, 0 otherwise. 1381 */ 1382static inline int ata_ncq_enabled(struct ata_device *dev) 1383{ 1384 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1385 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1386} 1387 1388static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1389{ 1390 qc->tf.ctl |= ATA_NIEN; 1391} 1392 1393static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1394 unsigned int tag) 1395{ 1396 if (likely(ata_tag_valid(tag))) 1397 return &ap->qcmd[tag]; 1398 return NULL; 1399} 1400 1401static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1402 unsigned int tag) 1403{ 1404 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1405 1406 if (unlikely(!qc) || !ap->ops->error_handler) 1407 return qc; 1408 1409 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1410 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1411 return qc; 1412 1413 return NULL; 1414} 1415 1416static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1417{ 1418 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1419} 1420 1421static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1422{ 1423 memset(tf, 0, sizeof(*tf)); 1424 1425 tf->ctl = dev->link->ap->ctl; 1426 if (dev->devno == 0) 1427 tf->device = ATA_DEVICE_OBS; 1428 else 1429 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1430} 1431 1432static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1433{ 1434 qc->dma_dir = DMA_NONE; 1435 qc->sg = NULL; 1436 qc->flags = 0; 1437 qc->cursg = NULL; 1438 qc->cursg_ofs = 0; 1439 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1440 qc->n_elem = 0; 1441 qc->err_mask = 0; 1442 qc->sect_size = ATA_SECT_SIZE; 1443 1444 ata_tf_init(qc->dev, &qc->tf); 1445 1446 /* init result_tf such that it indicates normal completion */ 1447 qc->result_tf.command = ATA_DRDY; 1448 qc->result_tf.feature = 0; 1449} 1450 1451static inline int ata_try_flush_cache(const struct ata_device *dev) 1452{ 1453 return ata_id_wcache_enabled(dev->id) || 1454 ata_id_has_flush(dev->id) || 1455 ata_id_has_flush_ext(dev->id); 1456} 1457 1458static inline unsigned int ac_err_mask(u8 status) 1459{ 1460 if (status & (ATA_BUSY | ATA_DRQ)) 1461 return AC_ERR_HSM; 1462 if (status & (ATA_ERR | ATA_DF)) 1463 return AC_ERR_DEV; 1464 return 0; 1465} 1466 1467static inline unsigned int __ac_err_mask(u8 status) 1468{ 1469 unsigned int mask = ac_err_mask(status); 1470 if (mask == 0) 1471 return AC_ERR_OTHER; 1472 return mask; 1473} 1474 1475static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1476{ 1477 return *(struct ata_port **)&host->hostdata[0]; 1478} 1479 1480static inline int ata_check_ready(u8 status) 1481{ 1482 if (!(status & ATA_BUSY)) 1483 return 1; 1484 1485 /* 0xff indicates either no device or device not ready */ 1486 if (status == 0xff) 1487 return -ENODEV; 1488 1489 return 0; 1490} 1491 1492static inline unsigned long ata_deadline(unsigned long from_jiffies, 1493 unsigned long timeout_msecs) 1494{ 1495 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1496} 1497 1498/* Don't open code these in drivers as there are traps. Firstly the range may 1499 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1500 > UDMA_0. Dyma ddreigiau */ 1501 1502static inline int ata_using_mwdma(struct ata_device *adev) 1503{ 1504 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1505 return 1; 1506 return 0; 1507} 1508 1509static inline int ata_using_udma(struct ata_device *adev) 1510{ 1511 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1512 return 1; 1513 return 0; 1514} 1515 1516static inline int ata_dma_enabled(struct ata_device *adev) 1517{ 1518 return (adev->dma_mode == 0xFF ? 0 : 1); 1519} 1520 1521/************************************************************************** 1522 * PMP - drivers/ata/libata-pmp.c 1523 */ 1524#ifdef CONFIG_SATA_PMP 1525 1526extern const struct ata_port_operations sata_pmp_port_ops; 1527 1528extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1529extern void sata_pmp_error_handler(struct ata_port *ap); 1530 1531#else /* CONFIG_SATA_PMP */ 1532 1533#define sata_pmp_port_ops sata_port_ops 1534#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1535#define sata_pmp_error_handler ata_std_error_handler 1536 1537#endif /* CONFIG_SATA_PMP */ 1538 1539 1540/************************************************************************** 1541 * SFF - drivers/ata/libata-sff.c 1542 */ 1543#ifdef CONFIG_ATA_SFF 1544 1545extern const struct ata_port_operations ata_sff_port_ops; 1546extern const struct ata_port_operations ata_bmdma_port_ops; 1547extern const struct ata_port_operations ata_bmdma32_port_ops; 1548 1549/* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1550#define ATA_PIO_SHT(drv_name) \ 1551 ATA_BASE_SHT(drv_name), \ 1552 .sg_tablesize = LIBATA_MAX_PRD, \ 1553 .dma_boundary = ATA_DMA_BOUNDARY 1554 1555#define ATA_BMDMA_SHT(drv_name) \ 1556 ATA_BASE_SHT(drv_name), \ 1557 .sg_tablesize = LIBATA_MAX_PRD, \ 1558 .dma_boundary = ATA_DMA_BOUNDARY 1559 1560extern void ata_sff_qc_prep(struct ata_queued_cmd *qc); 1561extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc); 1562extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1563extern u8 ata_sff_check_status(struct ata_port *ap); 1564extern void ata_sff_pause(struct ata_port *ap); 1565extern void ata_sff_dma_pause(struct ata_port *ap); 1566extern int ata_sff_busy_sleep(struct ata_port *ap, 1567 unsigned long timeout_pat, unsigned long timeout); 1568extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1569extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1570extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1571extern void ata_sff_exec_command(struct ata_port *ap, 1572 const struct ata_taskfile *tf); 1573extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1574 unsigned char *buf, unsigned int buflen, int rw); 1575extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1576 unsigned char *buf, unsigned int buflen, int rw); 1577extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1578 unsigned char *buf, unsigned int buflen, int rw); 1579extern u8 ata_sff_irq_on(struct ata_port *ap); 1580extern void ata_sff_irq_clear(struct ata_port *ap); 1581extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1582 u8 status, int in_wq); 1583extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1584extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1585extern unsigned int ata_sff_host_intr(struct ata_port *ap, 1586 struct ata_queued_cmd *qc); 1587extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1588extern void ata_sff_lost_interrupt(struct ata_port *ap); 1589extern void ata_sff_freeze(struct ata_port *ap); 1590extern void ata_sff_thaw(struct ata_port *ap); 1591extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1592extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1593 u8 *r_err); 1594extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1595 unsigned long deadline); 1596extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1597 unsigned long deadline); 1598extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1599 unsigned long deadline); 1600extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1601extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1602extern void ata_sff_error_handler(struct ata_port *ap); 1603extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc); 1604extern int ata_sff_port_start(struct ata_port *ap); 1605extern int ata_sff_port_start32(struct ata_port *ap); 1606extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1607extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev, 1608 unsigned long xfer_mask); 1609extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1610extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1611extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1612extern u8 ata_bmdma_status(struct ata_port *ap); 1613extern void ata_bus_reset(struct ata_port *ap); 1614 1615#ifdef CONFIG_PCI 1616extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1617extern int ata_pci_bmdma_init(struct ata_host *host); 1618extern int ata_pci_sff_init_host(struct ata_host *host); 1619extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1620 const struct ata_port_info * const * ppi, 1621 struct ata_host **r_host); 1622extern int ata_pci_sff_activate_host(struct ata_host *host, 1623 irq_handler_t irq_handler, 1624 struct scsi_host_template *sht); 1625extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1626 const struct ata_port_info * const * ppi, 1627 struct scsi_host_template *sht, void *host_priv); 1628#endif /* CONFIG_PCI */ 1629 1630/** 1631 * ata_sff_busy_wait - Wait for a port status register 1632 * @ap: Port to wait for. 1633 * @bits: bits that must be clear 1634 * @max: number of 10uS waits to perform 1635 * 1636 * Waits up to max*10 microseconds for the selected bits in the port's 1637 * status register to be cleared. 1638 * Returns final value of status register. 1639 * 1640 * LOCKING: 1641 * Inherited from caller. 1642 */ 1643static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1644 unsigned int max) 1645{ 1646 u8 status; 1647 1648 do { 1649 udelay(10); 1650 status = ap->ops->sff_check_status(ap); 1651 max--; 1652 } while (status != 0xff && (status & bits) && (max > 0)); 1653 1654 return status; 1655} 1656 1657/** 1658 * ata_wait_idle - Wait for a port to be idle. 1659 * @ap: Port to wait for. 1660 * 1661 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1662 * Returns final value of status register. 1663 * 1664 * LOCKING: 1665 * Inherited from caller. 1666 */ 1667static inline u8 ata_wait_idle(struct ata_port *ap) 1668{ 1669 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1670 1671#ifdef ATA_DEBUG 1672 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1673 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1674 status); 1675#endif 1676 1677 return status; 1678} 1679#endif /* CONFIG_ATA_SFF */ 1680 1681#endif /* __LINUX_LIBATA_H__ */ 1682