libata.h revision f47451c45fe0032ef491aaf3e0623fa0154e156d
1/* 2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved. 3 * Copyright 2003-2005 Jeff Garzik 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2, or (at your option) 9 * any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; see the file COPYING. If not, write to 18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 19 * 20 * 21 * libata documentation is available via 'make {ps|pdf}docs', 22 * as Documentation/DocBook/libata.* 23 * 24 */ 25 26#ifndef __LINUX_LIBATA_H__ 27#define __LINUX_LIBATA_H__ 28 29#include <linux/delay.h> 30#include <linux/jiffies.h> 31#include <linux/interrupt.h> 32#include <linux/dma-mapping.h> 33#include <linux/scatterlist.h> 34#include <linux/io.h> 35#include <linux/ata.h> 36#include <linux/workqueue.h> 37#include <scsi/scsi_host.h> 38#include <linux/acpi.h> 39#include <linux/cdrom.h> 40 41/* 42 * Define if arch has non-standard setup. This is a _PCI_ standard 43 * not a legacy or ISA standard. 44 */ 45#ifdef CONFIG_ATA_NONSTANDARD 46#include <asm/libata-portmap.h> 47#else 48#include <asm-generic/libata-portmap.h> 49#endif 50 51/* 52 * compile-time options: to be removed as soon as all the drivers are 53 * converted to the new debugging mechanism 54 */ 55#undef ATA_DEBUG /* debugging output */ 56#undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 57#undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 58#undef ATA_NDEBUG /* define to disable quick runtime checks */ 59 60 61/* note: prints function name for you */ 62#ifdef ATA_DEBUG 63#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) 64#ifdef ATA_VERBOSE_DEBUG 65#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) 66#else 67#define VPRINTK(fmt, args...) 68#endif /* ATA_VERBOSE_DEBUG */ 69#else 70#define DPRINTK(fmt, args...) 71#define VPRINTK(fmt, args...) 72#endif /* ATA_DEBUG */ 73 74#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args) 75 76/* NEW: debug levels */ 77#define HAVE_LIBATA_MSG 1 78 79enum { 80 ATA_MSG_DRV = 0x0001, 81 ATA_MSG_INFO = 0x0002, 82 ATA_MSG_PROBE = 0x0004, 83 ATA_MSG_WARN = 0x0008, 84 ATA_MSG_MALLOC = 0x0010, 85 ATA_MSG_CTL = 0x0020, 86 ATA_MSG_INTR = 0x0040, 87 ATA_MSG_ERR = 0x0080, 88}; 89 90#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 91#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 92#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 93#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 94#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 95#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 96#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 97#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 98 99static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 100{ 101 if (dval < 0 || dval >= (sizeof(u32) * 8)) 102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 103 if (!dval) 104 return 0; 105 return (1 << dval) - 1; 106} 107 108/* defines only for the constants which don't work well as enums */ 109#define ATA_TAG_POISON 0xfafbfcfdU 110 111enum { 112 /* various global constants */ 113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ 115 ATA_DEF_QUEUE = 1, 116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 117 ATA_MAX_QUEUE = 32, 118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 119 ATA_SHORT_PAUSE = 16, 120 121 ATAPI_MAX_DRAIN = 16 << 10, 122 123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1, 124 125 ATA_SHT_EMULATED = 1, 126 ATA_SHT_CMD_PER_LUN = 1, 127 ATA_SHT_THIS_ID = -1, 128 ATA_SHT_USE_CLUSTERING = 1, 129 130 /* struct ata_device stuff */ 131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 138 ATA_DFLAG_AN = (1 << 7), /* AN configured */ 139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */ 140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */ 141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */ 142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1, 143 144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */ 145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */ 146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */ 147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */ 148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */ 149 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */ 150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1, 151 152 ATA_DFLAG_DETACH = (1 << 24), 153 ATA_DFLAG_DETACHED = (1 << 25), 154 155 ATA_DEV_UNKNOWN = 0, /* unknown device */ 156 ATA_DEV_ATA = 1, /* ATA device */ 157 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 158 ATA_DEV_ATAPI = 3, /* ATAPI device */ 159 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 160 ATA_DEV_PMP = 5, /* SATA port multiplier */ 161 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 162 ATA_DEV_SEMB = 7, /* SEMB */ 163 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 164 ATA_DEV_NONE = 9, /* no device */ 165 166 /* struct ata_link flags */ 167 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ 168 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ 169 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ 170 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ 171 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 174 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */ 175 176 /* struct ata_port flags */ 177 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 178 /* (doesn't imply presence) */ 179 ATA_FLAG_SATA = (1 << 1), 180 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 181 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 182 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 183 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 184 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 185 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 186 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 187 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 188 * doesn't handle PIO interrupts */ 189 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 190 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ 191 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ 192 ATA_FLAG_DEBUGMSG = (1 << 13), 193 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */ 194 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 195 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 196 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 197 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 198 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 199 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */ 200 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 201 * management */ 202 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 203 * led */ 204 205 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 206 207 208 /* struct ata_port pflags */ 209 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 210 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 211 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 212 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 213 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 214 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 215 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 216 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 217 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 218 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 219 220 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 221 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 222 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 223 224 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 225 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 226 227 /* struct ata_queued_cmd flags */ 228 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 229 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 230 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 231 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 232 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 233 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 234 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 235 236 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 237 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 238 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 239 240 /* host set flags */ 241 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 242 ATA_HOST_STARTED = (1 << 1), /* Host started */ 243 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 244 245 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 246 247 /* various lengths of time */ 248 ATA_TMOUT_BOOT = 30000, /* heuristic */ 249 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 250 ATA_TMOUT_INTERNAL_QUICK = 5000, 251 ATA_TMOUT_MAX_PARK = 30000, 252 253 /* 254 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s 255 * is too much without parallel probing. Use 2s if parallel 256 * probing is available, 800ms otherwise. 257 */ 258 ATA_TMOUT_FF_WAIT_LONG = 2000, 259 ATA_TMOUT_FF_WAIT = 800, 260 261 /* Spec mandates to wait for ">= 2ms" before checking status 262 * after reset. We wait 150ms, because that was the magic 263 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 264 * the period of time between when the ATA command register is 265 * written, and then status is checked. Because waiting for 266 * "a while" before checking status is fine, post SRST, we 267 * perform this magic delay here as well. 268 * 269 * Old drivers/ide uses the 2mS rule and then waits for ready. 270 */ 271 ATA_WAIT_AFTER_RESET = 150, 272 273 /* If PMP is supported, we have to do follow-up SRST. As some 274 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 275 * advised to wait only for the following duration before 276 * doing SRST. 277 */ 278 ATA_TMOUT_PMP_SRST_WAIT = 5000, 279 280 /* ATA bus states */ 281 BUS_UNKNOWN = 0, 282 BUS_DMA = 1, 283 BUS_IDLE = 2, 284 BUS_NOINTR = 3, 285 BUS_NODATA = 4, 286 BUS_TIMER = 5, 287 BUS_PIO = 6, 288 BUS_EDD = 7, 289 BUS_IDENTIFY = 8, 290 BUS_PACKET = 9, 291 292 /* SATA port states */ 293 PORT_UNKNOWN = 0, 294 PORT_ENABLED = 1, 295 PORT_DISABLED = 2, 296 297 /* encoding various smaller bitmaps into a single 298 * unsigned long bitmap 299 */ 300 ATA_NR_PIO_MODES = 7, 301 ATA_NR_MWDMA_MODES = 5, 302 ATA_NR_UDMA_MODES = 8, 303 304 ATA_SHIFT_PIO = 0, 305 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 306 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 307 308 /* size of buffer to pad xfers ending on unaligned boundaries */ 309 ATA_DMA_PAD_SZ = 4, 310 311 /* ering size */ 312 ATA_ERING_SIZE = 32, 313 314 /* return values for ->qc_defer */ 315 ATA_DEFER_LINK = 1, 316 ATA_DEFER_PORT = 2, 317 318 /* desc_len for ata_eh_info and context */ 319 ATA_EH_DESC_LEN = 80, 320 321 /* reset / recovery action types */ 322 ATA_EH_REVALIDATE = (1 << 0), 323 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 324 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 325 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 326 ATA_EH_ENABLE_LINK = (1 << 3), 327 ATA_EH_LPM = (1 << 4), /* link power management action */ 328 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 329 330 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 331 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 332 ATA_EH_ENABLE_LINK | ATA_EH_LPM, 333 334 /* ata_eh_info->flags */ 335 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 336 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 337 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 338 339 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 340 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 341 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 342 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 343 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 344 345 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 346 347 /* mask of flags to transfer *to* the slave link */ 348 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 349 350 /* max tries if error condition is still set after ->error_handler */ 351 ATA_EH_MAX_TRIES = 5, 352 353 /* sometimes resuming a link requires several retries */ 354 ATA_LINK_RESUME_TRIES = 5, 355 356 /* how hard are we gonna try to probe/recover devices */ 357 ATA_PROBE_MAX_TRIES = 3, 358 ATA_EH_DEV_TRIES = 3, 359 ATA_EH_PMP_TRIES = 5, 360 ATA_EH_PMP_LINK_TRIES = 3, 361 362 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 363 364 /* This should match the actual table size of 365 * ata_eh_cmd_timeout_table in libata-eh.c. 366 */ 367 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6, 368 369 /* Horkage types. May be set by libata or controller on drives 370 (some horkage may be drive/controller pair dependant */ 371 372 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 373 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 374 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 375 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 376 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 377 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 378 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 379 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */ 380 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 381 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 382 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 383 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 384 not multiple of 16 bytes */ 385 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */ 386 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 387 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ 388 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ 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 /* ACPI constants */ 422 ATA_ACPI_FILTER_SETXFER = 1 << 0, 423 ATA_ACPI_FILTER_LOCK = 1 << 1, 424 ATA_ACPI_FILTER_DIPM = 1 << 2, 425 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 426 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 427 428 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 429 ATA_ACPI_FILTER_LOCK | 430 ATA_ACPI_FILTER_DIPM, 431}; 432 433enum ata_xfer_mask { 434 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 435 << ATA_SHIFT_PIO, 436 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 437 << ATA_SHIFT_MWDMA, 438 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 439 << ATA_SHIFT_UDMA, 440}; 441 442enum hsm_task_states { 443 HSM_ST_IDLE, /* no command on going */ 444 HSM_ST_FIRST, /* (waiting the device to) 445 write CDB or first data block */ 446 HSM_ST, /* (waiting the device to) transfer data */ 447 HSM_ST_LAST, /* (waiting the device to) complete command */ 448 HSM_ST_ERR, /* error */ 449}; 450 451enum ata_completion_errors { 452 AC_ERR_DEV = (1 << 0), /* device reported error */ 453 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 454 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 455 AC_ERR_MEDIA = (1 << 3), /* media error */ 456 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 457 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 458 AC_ERR_SYSTEM = (1 << 6), /* system error */ 459 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 460 AC_ERR_OTHER = (1 << 8), /* unknown */ 461 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 462 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 463}; 464 465/* forward declarations */ 466struct scsi_device; 467struct ata_port_operations; 468struct ata_port; 469struct ata_link; 470struct ata_queued_cmd; 471 472/* typedefs */ 473typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 474typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 475typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 476 unsigned long deadline); 477typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 478 479/* 480 * host pm policy: If you alter this, you also need to alter libata-scsi.c 481 * (for the ascii descriptions) 482 */ 483enum link_pm { 484 NOT_AVAILABLE, 485 MIN_POWER, 486 MAX_PERFORMANCE, 487 MEDIUM_POWER, 488}; 489extern struct device_attribute dev_attr_link_power_management_policy; 490extern struct device_attribute dev_attr_unload_heads; 491extern struct device_attribute dev_attr_em_message_type; 492extern struct device_attribute dev_attr_em_message; 493extern struct device_attribute dev_attr_sw_activity; 494 495enum sw_activity { 496 OFF, 497 BLINK_ON, 498 BLINK_OFF, 499}; 500 501#ifdef CONFIG_ATA_SFF 502struct ata_ioports { 503 void __iomem *cmd_addr; 504 void __iomem *data_addr; 505 void __iomem *error_addr; 506 void __iomem *feature_addr; 507 void __iomem *nsect_addr; 508 void __iomem *lbal_addr; 509 void __iomem *lbam_addr; 510 void __iomem *lbah_addr; 511 void __iomem *device_addr; 512 void __iomem *status_addr; 513 void __iomem *command_addr; 514 void __iomem *altstatus_addr; 515 void __iomem *ctl_addr; 516 void __iomem *bmdma_addr; 517 void __iomem *scr_addr; 518}; 519#endif /* CONFIG_ATA_SFF */ 520 521struct ata_host { 522 spinlock_t lock; 523 struct device *dev; 524 void __iomem * const *iomap; 525 unsigned int n_ports; 526 void *private_data; 527 struct ata_port_operations *ops; 528 unsigned long flags; 529#ifdef CONFIG_ATA_ACPI 530 acpi_handle acpi_handle; 531#endif 532 struct ata_port *simplex_claimed; /* channel owning the DMA */ 533 struct ata_port *ports[0]; 534}; 535 536struct ata_queued_cmd { 537 struct ata_port *ap; 538 struct ata_device *dev; 539 540 struct scsi_cmnd *scsicmd; 541 void (*scsidone)(struct scsi_cmnd *); 542 543 struct ata_taskfile tf; 544 u8 cdb[ATAPI_CDB_LEN]; 545 546 unsigned long flags; /* ATA_QCFLAG_xxx */ 547 unsigned int tag; 548 unsigned int n_elem; 549 unsigned int orig_n_elem; 550 551 int dma_dir; 552 553 unsigned int sect_size; 554 555 unsigned int nbytes; 556 unsigned int extrabytes; 557 unsigned int curbytes; 558 559 struct scatterlist *cursg; 560 unsigned int cursg_ofs; 561 562 struct scatterlist sgent; 563 564 struct scatterlist *sg; 565 566 unsigned int err_mask; 567 struct ata_taskfile result_tf; 568 ata_qc_cb_t complete_fn; 569 570 void *private_data; 571 void *lldd_task; 572}; 573 574struct ata_port_stats { 575 unsigned long unhandled_irq; 576 unsigned long idle_irq; 577 unsigned long rw_reqbuf; 578}; 579 580struct ata_ering_entry { 581 unsigned int eflags; 582 unsigned int err_mask; 583 u64 timestamp; 584}; 585 586struct ata_ering { 587 int cursor; 588 struct ata_ering_entry ring[ATA_ERING_SIZE]; 589}; 590 591struct ata_device { 592 struct ata_link *link; 593 unsigned int devno; /* 0 or 1 */ 594 unsigned int horkage; /* List of broken features */ 595 unsigned long flags; /* ATA_DFLAG_xxx */ 596 struct scsi_device *sdev; /* attached SCSI device */ 597 void *private_data; 598#ifdef CONFIG_ATA_ACPI 599 acpi_handle acpi_handle; 600 union acpi_object *gtf_cache; 601 unsigned int gtf_filter; 602#endif 603 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 604 u64 n_sectors; /* size of device, if ATA */ 605 u64 n_native_sectors; /* native size, if ATA */ 606 unsigned int class; /* ATA_DEV_xxx */ 607 unsigned long unpark_deadline; 608 609 u8 pio_mode; 610 u8 dma_mode; 611 u8 xfer_mode; 612 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 613 614 unsigned int multi_count; /* sectors count for 615 READ/WRITE MULTIPLE */ 616 unsigned int max_sectors; /* per-device max sectors */ 617 unsigned int cdb_len; 618 619 /* per-dev xfer mask */ 620 unsigned long pio_mask; 621 unsigned long mwdma_mask; 622 unsigned long udma_mask; 623 624 /* for CHS addressing */ 625 u16 cylinders; /* Number of cylinders */ 626 u16 heads; /* Number of heads */ 627 u16 sectors; /* Number of sectors per track */ 628 629 union { 630 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 631 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 632 }; 633 634 /* error history */ 635 int spdn_cnt; 636 /* ering is CLEAR_END, read comment above CLEAR_END */ 637 struct ata_ering ering; 638}; 639 640/* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 641 * cleared to zero on ata_dev_init(). 642 */ 643#define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 644#define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 645 646struct ata_eh_info { 647 struct ata_device *dev; /* offending device */ 648 u32 serror; /* SError from LLDD */ 649 unsigned int err_mask; /* port-wide err_mask */ 650 unsigned int action; /* ATA_EH_* action mask */ 651 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 652 unsigned int flags; /* ATA_EHI_* flags */ 653 654 unsigned int probe_mask; 655 656 char desc[ATA_EH_DESC_LEN]; 657 int desc_len; 658}; 659 660struct ata_eh_context { 661 struct ata_eh_info i; 662 int tries[ATA_MAX_DEVICES]; 663 int cmd_timeout_idx[ATA_MAX_DEVICES] 664 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 665 unsigned int classes[ATA_MAX_DEVICES]; 666 unsigned int did_probe_mask; 667 unsigned int unloaded_mask; 668 unsigned int saved_ncq_enabled; 669 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 670 /* timestamp for the last reset attempt or success */ 671 unsigned long last_reset; 672}; 673 674struct ata_acpi_drive 675{ 676 u32 pio; 677 u32 dma; 678} __packed; 679 680struct ata_acpi_gtm { 681 struct ata_acpi_drive drive[2]; 682 u32 flags; 683} __packed; 684 685struct ata_link { 686 struct ata_port *ap; 687 int pmp; /* port multiplier port # */ 688 689 unsigned int active_tag; /* active tag on this link */ 690 u32 sactive; /* active NCQ commands */ 691 692 unsigned int flags; /* ATA_LFLAG_xxx */ 693 694 u32 saved_scontrol; /* SControl on probe */ 695 unsigned int hw_sata_spd_limit; 696 unsigned int sata_spd_limit; 697 unsigned int sata_spd; /* current SATA PHY speed */ 698 699 /* record runtime error info, protected by host_set lock */ 700 struct ata_eh_info eh_info; 701 /* EH context */ 702 struct ata_eh_context eh_context; 703 704 struct ata_device device[ATA_MAX_DEVICES]; 705}; 706 707struct ata_port { 708 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 709 struct ata_port_operations *ops; 710 spinlock_t *lock; 711 /* Flags owned by the EH context. Only EH should touch these once the 712 port is active */ 713 unsigned long flags; /* ATA_FLAG_xxx */ 714 /* Flags that change dynamically, protected by ap->lock */ 715 unsigned int pflags; /* ATA_PFLAG_xxx */ 716 unsigned int print_id; /* user visible unique port ID */ 717 unsigned int port_no; /* 0 based port no. inside the host */ 718 719 struct ata_prd *prd; /* our SG list */ 720 dma_addr_t prd_dma; /* and its DMA mapping */ 721 722#ifdef CONFIG_ATA_SFF 723 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 724 u8 ctl; /* cache of ATA control register */ 725 u8 last_ctl; /* Cache last written value */ 726 struct delayed_work sff_pio_task; 727#endif /* CONFIG_ATA_SFF */ 728 729 unsigned int pio_mask; 730 unsigned int mwdma_mask; 731 unsigned int udma_mask; 732 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 733 734 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 735 unsigned long qc_allocated; 736 unsigned int qc_active; 737 int nr_active_links; /* #links with active qcs */ 738 739 struct ata_link link; /* host default link */ 740 struct ata_link *slave_link; /* see ata_slave_link_init() */ 741 742 int nr_pmp_links; /* nr of available PMP links */ 743 struct ata_link *pmp_link; /* array of PMP links */ 744 struct ata_link *excl_link; /* for PMP qc exclusion */ 745 746 struct ata_port_stats stats; 747 struct ata_host *host; 748 struct device *dev; 749 750 struct delayed_work hotplug_task; 751 struct work_struct scsi_rescan_task; 752 753 unsigned int hsm_task_state; 754 755 u32 msg_enable; 756 struct list_head eh_done_q; 757 wait_queue_head_t eh_wait_q; 758 int eh_tries; 759 struct completion park_req_pending; 760 761 pm_message_t pm_mesg; 762 int *pm_result; 763 enum link_pm pm_policy; 764 765 struct timer_list fastdrain_timer; 766 unsigned long fastdrain_cnt; 767 768 int em_message_type; 769 void *private_data; 770 771#ifdef CONFIG_ATA_ACPI 772 acpi_handle acpi_handle; 773 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 774#endif 775 /* owned by EH */ 776 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 777}; 778 779/* The following initializer overrides a method to NULL whether one of 780 * its parent has the method defined or not. This is equivalent to 781 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 782 * expression and thus can't be used as an initializer. 783 */ 784#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 785 786struct ata_port_operations { 787 /* 788 * Command execution 789 */ 790 int (*qc_defer)(struct ata_queued_cmd *qc); 791 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 792 void (*qc_prep)(struct ata_queued_cmd *qc); 793 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 794 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 795 796 /* 797 * Configuration and exception handling 798 */ 799 int (*cable_detect)(struct ata_port *ap); 800 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 801 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 802 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 803 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 804 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 805 806 void (*dev_config)(struct ata_device *dev); 807 808 void (*freeze)(struct ata_port *ap); 809 void (*thaw)(struct ata_port *ap); 810 ata_prereset_fn_t prereset; 811 ata_reset_fn_t softreset; 812 ata_reset_fn_t hardreset; 813 ata_postreset_fn_t postreset; 814 ata_prereset_fn_t pmp_prereset; 815 ata_reset_fn_t pmp_softreset; 816 ata_reset_fn_t pmp_hardreset; 817 ata_postreset_fn_t pmp_postreset; 818 void (*error_handler)(struct ata_port *ap); 819 void (*lost_interrupt)(struct ata_port *ap); 820 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 821 822 /* 823 * Optional features 824 */ 825 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 826 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 827 void (*pmp_attach)(struct ata_port *ap); 828 void (*pmp_detach)(struct ata_port *ap); 829 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 830 void (*disable_pm)(struct ata_port *ap); 831 832 /* 833 * Start, stop, suspend and resume 834 */ 835 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 836 int (*port_resume)(struct ata_port *ap); 837 int (*port_start)(struct ata_port *ap); 838 void (*port_stop)(struct ata_port *ap); 839 void (*host_stop)(struct ata_host *host); 840 841#ifdef CONFIG_ATA_SFF 842 /* 843 * SFF / taskfile oriented ops 844 */ 845 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 846 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl); 847 u8 (*sff_check_status)(struct ata_port *ap); 848 u8 (*sff_check_altstatus)(struct ata_port *ap); 849 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 850 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 851 void (*sff_exec_command)(struct ata_port *ap, 852 const struct ata_taskfile *tf); 853 unsigned int (*sff_data_xfer)(struct ata_device *dev, 854 unsigned char *buf, unsigned int buflen, int rw); 855 void (*sff_irq_on)(struct ata_port *); 856 bool (*sff_irq_check)(struct ata_port *); 857 void (*sff_irq_clear)(struct ata_port *); 858 void (*sff_drain_fifo)(struct ata_queued_cmd *qc); 859 860 void (*bmdma_setup)(struct ata_queued_cmd *qc); 861 void (*bmdma_start)(struct ata_queued_cmd *qc); 862 void (*bmdma_stop)(struct ata_queued_cmd *qc); 863 u8 (*bmdma_status)(struct ata_port *ap); 864#endif /* CONFIG_ATA_SFF */ 865 866 ssize_t (*em_show)(struct ata_port *ap, char *buf); 867 ssize_t (*em_store)(struct ata_port *ap, const char *message, 868 size_t size); 869 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 870 ssize_t (*sw_activity_store)(struct ata_device *dev, 871 enum sw_activity val); 872 /* 873 * Obsolete 874 */ 875 void (*phy_reset)(struct ata_port *ap); 876 void (*eng_timeout)(struct ata_port *ap); 877 878 /* 879 * ->inherits must be the last field and all the preceding 880 * fields must be pointers. 881 */ 882 const struct ata_port_operations *inherits; 883}; 884 885struct ata_port_info { 886 unsigned long flags; 887 unsigned long link_flags; 888 unsigned long pio_mask; 889 unsigned long mwdma_mask; 890 unsigned long udma_mask; 891 struct ata_port_operations *port_ops; 892 void *private_data; 893}; 894 895struct ata_timing { 896 unsigned short mode; /* ATA mode */ 897 unsigned short setup; /* t1 */ 898 unsigned short act8b; /* t2 for 8-bit I/O */ 899 unsigned short rec8b; /* t2i for 8-bit I/O */ 900 unsigned short cyc8b; /* t0 for 8-bit I/O */ 901 unsigned short active; /* t2 or tD */ 902 unsigned short recover; /* t2i or tK */ 903 unsigned short dmack_hold; /* tj */ 904 unsigned short cycle; /* t0 */ 905 unsigned short udma; /* t2CYCTYP/2 */ 906}; 907 908/* 909 * Core layer - drivers/ata/libata-core.c 910 */ 911extern const unsigned long sata_deb_timing_normal[]; 912extern const unsigned long sata_deb_timing_hotplug[]; 913extern const unsigned long sata_deb_timing_long[]; 914 915extern struct ata_port_operations ata_dummy_port_ops; 916extern const struct ata_port_info ata_dummy_port_info; 917 918static inline const unsigned long * 919sata_ehc_deb_timing(struct ata_eh_context *ehc) 920{ 921 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 922 return sata_deb_timing_hotplug; 923 else 924 return sata_deb_timing_normal; 925} 926 927static inline int ata_port_is_dummy(struct ata_port *ap) 928{ 929 return ap->ops == &ata_dummy_port_ops; 930} 931 932extern int sata_set_spd(struct ata_link *link); 933extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 934extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 935 int (*check_ready)(struct ata_link *link)); 936extern int sata_link_debounce(struct ata_link *link, 937 const unsigned long *params, unsigned long deadline); 938extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 939 unsigned long deadline); 940extern int sata_link_hardreset(struct ata_link *link, 941 const unsigned long *timing, unsigned long deadline, 942 bool *online, int (*check_ready)(struct ata_link *)); 943extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 944 unsigned long deadline); 945extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 946 947extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 948extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 949 const struct ata_port_info * const * ppi, int n_ports); 950extern int ata_slave_link_init(struct ata_port *ap); 951extern int ata_host_start(struct ata_host *host); 952extern int ata_host_register(struct ata_host *host, 953 struct scsi_host_template *sht); 954extern int ata_host_activate(struct ata_host *host, int irq, 955 irq_handler_t irq_handler, unsigned long irq_flags, 956 struct scsi_host_template *sht); 957extern void ata_host_detach(struct ata_host *host); 958extern void ata_host_init(struct ata_host *, struct device *, 959 unsigned long, struct ata_port_operations *); 960extern int ata_scsi_detect(struct scsi_host_template *sht); 961extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 962extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 963extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 964 int cmd, void __user *arg); 965extern void ata_sas_port_destroy(struct ata_port *); 966extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 967 struct ata_port_info *, struct Scsi_Host *); 968extern int ata_sas_port_init(struct ata_port *); 969extern int ata_sas_port_start(struct ata_port *ap); 970extern void ata_sas_port_stop(struct ata_port *ap); 971extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 972extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 973 struct ata_port *ap); 974extern int sata_scr_valid(struct ata_link *link); 975extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 976extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 977extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 978extern bool ata_link_online(struct ata_link *link); 979extern bool ata_link_offline(struct ata_link *link); 980#ifdef CONFIG_PM 981extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 982extern void ata_host_resume(struct ata_host *host); 983#endif 984extern int ata_ratelimit(void); 985extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 986 unsigned long interval, unsigned long timeout); 987extern int atapi_cmd_type(u8 opcode); 988extern void ata_tf_to_fis(const struct ata_taskfile *tf, 989 u8 pmp, int is_cmd, u8 *fis); 990extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 991extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 992 unsigned long mwdma_mask, unsigned long udma_mask); 993extern void ata_unpack_xfermask(unsigned long xfer_mask, 994 unsigned long *pio_mask, unsigned long *mwdma_mask, 995 unsigned long *udma_mask); 996extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 997extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 998extern int ata_xfer_mode2shift(unsigned long xfer_mode); 999extern const char *ata_mode_string(unsigned long xfer_mask); 1000extern unsigned long ata_id_xfermask(const u16 *id); 1001extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1002extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 1003extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1004 unsigned int n_elem); 1005extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1006extern void ata_dev_disable(struct ata_device *adev); 1007extern void ata_id_string(const u16 *id, unsigned char *s, 1008 unsigned int ofs, unsigned int len); 1009extern void ata_id_c_string(const u16 *id, unsigned char *s, 1010 unsigned int ofs, unsigned int len); 1011extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1012 struct ata_taskfile *tf, u16 *id); 1013extern void ata_qc_complete(struct ata_queued_cmd *qc); 1014extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 1015extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 1016 void (*done)(struct scsi_cmnd *)); 1017extern int ata_std_bios_param(struct scsi_device *sdev, 1018 struct block_device *bdev, 1019 sector_t capacity, int geom[]); 1020extern int ata_scsi_slave_config(struct scsi_device *sdev); 1021extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1022extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1023 int queue_depth, int reason); 1024extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1025extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1026 1027extern int ata_cable_40wire(struct ata_port *ap); 1028extern int ata_cable_80wire(struct ata_port *ap); 1029extern int ata_cable_sata(struct ata_port *ap); 1030extern int ata_cable_ignore(struct ata_port *ap); 1031extern int ata_cable_unknown(struct ata_port *ap); 1032 1033/* Timing helpers */ 1034extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1035extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1036extern int ata_timing_compute(struct ata_device *, unsigned short, 1037 struct ata_timing *, int, int); 1038extern void ata_timing_merge(const struct ata_timing *, 1039 const struct ata_timing *, struct ata_timing *, 1040 unsigned int); 1041extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1042 1043/* PCI */ 1044#ifdef CONFIG_PCI 1045struct pci_dev; 1046 1047struct pci_bits { 1048 unsigned int reg; /* PCI config register to read */ 1049 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1050 unsigned long mask; 1051 unsigned long val; 1052}; 1053 1054extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1055extern void ata_pci_remove_one(struct pci_dev *pdev); 1056 1057#ifdef CONFIG_PM 1058extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1059extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1060extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1061extern int ata_pci_device_resume(struct pci_dev *pdev); 1062#endif /* CONFIG_PM */ 1063#endif /* CONFIG_PCI */ 1064 1065/* 1066 * ACPI - drivers/ata/libata-acpi.c 1067 */ 1068#ifdef CONFIG_ATA_ACPI 1069static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1070{ 1071 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1072 return &ap->__acpi_init_gtm; 1073 return NULL; 1074} 1075int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1076int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1077unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1078 const struct ata_acpi_gtm *gtm); 1079int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1080#else 1081static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1082{ 1083 return NULL; 1084} 1085 1086static inline int ata_acpi_stm(const struct ata_port *ap, 1087 struct ata_acpi_gtm *stm) 1088{ 1089 return -ENOSYS; 1090} 1091 1092static inline int ata_acpi_gtm(const struct ata_port *ap, 1093 struct ata_acpi_gtm *stm) 1094{ 1095 return -ENOSYS; 1096} 1097 1098static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1099 const struct ata_acpi_gtm *gtm) 1100{ 1101 return 0; 1102} 1103 1104static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1105 const struct ata_acpi_gtm *gtm) 1106{ 1107 return 0; 1108} 1109#endif 1110 1111/* 1112 * EH - drivers/ata/libata-eh.c 1113 */ 1114extern void ata_port_schedule_eh(struct ata_port *ap); 1115extern int ata_link_abort(struct ata_link *link); 1116extern int ata_port_abort(struct ata_port *ap); 1117extern int ata_port_freeze(struct ata_port *ap); 1118extern int sata_async_notification(struct ata_port *ap); 1119 1120extern void ata_eh_freeze_port(struct ata_port *ap); 1121extern void ata_eh_thaw_port(struct ata_port *ap); 1122 1123extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1124extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1125extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1126 1127extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1128 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1129 ata_postreset_fn_t postreset); 1130extern void ata_std_error_handler(struct ata_port *ap); 1131 1132/* 1133 * Base operations to inherit from and initializers for sht 1134 * 1135 * Operations 1136 * 1137 * base : Common to all libata drivers. 1138 * sata : SATA controllers w/ native interface. 1139 * pmp : SATA controllers w/ PMP support. 1140 * sff : SFF ATA controllers w/o BMDMA support. 1141 * bmdma : SFF ATA controllers w/ BMDMA support. 1142 * 1143 * sht initializers 1144 * 1145 * BASE : Common to all libata drivers. The user must set 1146 * sg_tablesize and dma_boundary. 1147 * PIO : SFF ATA controllers w/ only PIO support. 1148 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1149 * dma_boundary are set to BMDMA limits. 1150 * NCQ : SATA controllers supporting NCQ. The user must set 1151 * sg_tablesize, dma_boundary and can_queue. 1152 */ 1153extern const struct ata_port_operations ata_base_port_ops; 1154extern const struct ata_port_operations sata_port_ops; 1155extern struct device_attribute *ata_common_sdev_attrs[]; 1156 1157#define ATA_BASE_SHT(drv_name) \ 1158 .module = THIS_MODULE, \ 1159 .name = drv_name, \ 1160 .ioctl = ata_scsi_ioctl, \ 1161 .queuecommand = ata_scsi_queuecmd, \ 1162 .can_queue = ATA_DEF_QUEUE, \ 1163 .this_id = ATA_SHT_THIS_ID, \ 1164 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1165 .emulated = ATA_SHT_EMULATED, \ 1166 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1167 .proc_name = drv_name, \ 1168 .slave_configure = ata_scsi_slave_config, \ 1169 .slave_destroy = ata_scsi_slave_destroy, \ 1170 .bios_param = ata_std_bios_param, \ 1171 .sdev_attrs = ata_common_sdev_attrs 1172 1173#define ATA_NCQ_SHT(drv_name) \ 1174 ATA_BASE_SHT(drv_name), \ 1175 .change_queue_depth = ata_scsi_change_queue_depth 1176 1177/* 1178 * PMP helpers 1179 */ 1180#ifdef CONFIG_SATA_PMP 1181static inline bool sata_pmp_supported(struct ata_port *ap) 1182{ 1183 return ap->flags & ATA_FLAG_PMP; 1184} 1185 1186static inline bool sata_pmp_attached(struct ata_port *ap) 1187{ 1188 return ap->nr_pmp_links != 0; 1189} 1190 1191static inline int ata_is_host_link(const struct ata_link *link) 1192{ 1193 return link == &link->ap->link || link == link->ap->slave_link; 1194} 1195#else /* CONFIG_SATA_PMP */ 1196static inline bool sata_pmp_supported(struct ata_port *ap) 1197{ 1198 return false; 1199} 1200 1201static inline bool sata_pmp_attached(struct ata_port *ap) 1202{ 1203 return false; 1204} 1205 1206static inline int ata_is_host_link(const struct ata_link *link) 1207{ 1208 return 1; 1209} 1210#endif /* CONFIG_SATA_PMP */ 1211 1212static inline int sata_srst_pmp(struct ata_link *link) 1213{ 1214 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1215 return SATA_PMP_CTRL_PORT; 1216 return link->pmp; 1217} 1218 1219/* 1220 * printk helpers 1221 */ 1222#define ata_port_printk(ap, lv, fmt, args...) \ 1223 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1224 1225#define ata_link_printk(link, lv, fmt, args...) do { \ 1226 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1227 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1228 (link)->pmp , ##args); \ 1229 else \ 1230 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1231 } while(0) 1232 1233#define ata_dev_printk(dev, lv, fmt, args...) \ 1234 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1235 (dev)->link->pmp + (dev)->devno , ##args) 1236 1237/* 1238 * ata_eh_info helpers 1239 */ 1240extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1241 __attribute__ ((format (printf, 2, 3))); 1242extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1243 __attribute__ ((format (printf, 2, 3))); 1244extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1245 1246static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1247{ 1248 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1249 ehi->flags |= ATA_EHI_HOTPLUGGED; 1250 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1251 ehi->err_mask |= AC_ERR_ATA_BUS; 1252} 1253 1254/* 1255 * port description helpers 1256 */ 1257extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1258 __attribute__ ((format (printf, 2, 3))); 1259#ifdef CONFIG_PCI 1260extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1261 const char *name); 1262#endif 1263 1264static inline unsigned int ata_tag_valid(unsigned int tag) 1265{ 1266 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1267} 1268 1269static inline unsigned int ata_tag_internal(unsigned int tag) 1270{ 1271 return tag == ATA_TAG_INTERNAL; 1272} 1273 1274/* 1275 * device helpers 1276 */ 1277static inline unsigned int ata_class_enabled(unsigned int class) 1278{ 1279 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1280 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1281} 1282 1283static inline unsigned int ata_class_disabled(unsigned int class) 1284{ 1285 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1286 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1287} 1288 1289static inline unsigned int ata_class_absent(unsigned int class) 1290{ 1291 return !ata_class_enabled(class) && !ata_class_disabled(class); 1292} 1293 1294static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1295{ 1296 return ata_class_enabled(dev->class); 1297} 1298 1299static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1300{ 1301 return ata_class_disabled(dev->class); 1302} 1303 1304static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1305{ 1306 return ata_class_absent(dev->class); 1307} 1308 1309/* 1310 * link helpers 1311 */ 1312static inline int ata_link_max_devices(const struct ata_link *link) 1313{ 1314 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1315 return 2; 1316 return 1; 1317} 1318 1319static inline int ata_link_active(struct ata_link *link) 1320{ 1321 return ata_tag_valid(link->active_tag) || link->sactive; 1322} 1323 1324/* 1325 * Iterators 1326 * 1327 * ATA_LITER_* constants are used to select link iteration mode and 1328 * ATA_DITER_* device iteration mode. 1329 * 1330 * For a custom iteration directly using ata_{link|dev}_next(), if 1331 * @link or @dev, respectively, is NULL, the first element is 1332 * returned. @dev and @link can be any valid device or link and the 1333 * next element according to the iteration mode will be returned. 1334 * After the last element, NULL is returned. 1335 */ 1336enum ata_link_iter_mode { 1337 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1338 * host link. no slave link */ 1339 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1340 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1341 * slave link still comes after host link */ 1342}; 1343 1344enum ata_dev_iter_mode { 1345 ATA_DITER_ENABLED, 1346 ATA_DITER_ENABLED_REVERSE, 1347 ATA_DITER_ALL, 1348 ATA_DITER_ALL_REVERSE, 1349}; 1350 1351extern struct ata_link *ata_link_next(struct ata_link *link, 1352 struct ata_port *ap, 1353 enum ata_link_iter_mode mode); 1354 1355extern struct ata_device *ata_dev_next(struct ata_device *dev, 1356 struct ata_link *link, 1357 enum ata_dev_iter_mode mode); 1358 1359/* 1360 * Shortcut notation for iterations 1361 * 1362 * ata_for_each_link() iterates over each link of @ap according to 1363 * @mode. @link points to the current link in the loop. @link is 1364 * NULL after loop termination. ata_for_each_dev() works the same way 1365 * except that it iterates over each device of @link. 1366 * 1367 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1368 * specified when using the following shorthand notations. Only the 1369 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1370 * specified. This not only increases brevity but also makes it 1371 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1372 */ 1373#define ata_for_each_link(link, ap, mode) \ 1374 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1375 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1376 1377#define ata_for_each_dev(dev, link, mode) \ 1378 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1379 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1380 1381/** 1382 * ata_ncq_enabled - Test whether NCQ is enabled 1383 * @dev: ATA device to test for 1384 * 1385 * LOCKING: 1386 * spin_lock_irqsave(host lock) 1387 * 1388 * RETURNS: 1389 * 1 if NCQ is enabled for @dev, 0 otherwise. 1390 */ 1391static inline int ata_ncq_enabled(struct ata_device *dev) 1392{ 1393 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1394 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1395} 1396 1397static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1398{ 1399 qc->tf.ctl |= ATA_NIEN; 1400} 1401 1402static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1403 unsigned int tag) 1404{ 1405 if (likely(ata_tag_valid(tag))) 1406 return &ap->qcmd[tag]; 1407 return NULL; 1408} 1409 1410static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1411 unsigned int tag) 1412{ 1413 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1414 1415 if (unlikely(!qc) || !ap->ops->error_handler) 1416 return qc; 1417 1418 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1419 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1420 return qc; 1421 1422 return NULL; 1423} 1424 1425static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1426{ 1427 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1428} 1429 1430static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1431{ 1432 memset(tf, 0, sizeof(*tf)); 1433 1434#ifdef CONFIG_ATA_SFF 1435 tf->ctl = dev->link->ap->ctl; 1436#else 1437 tf->ctl = ATA_DEVCTL_OBS; 1438#endif 1439 if (dev->devno == 0) 1440 tf->device = ATA_DEVICE_OBS; 1441 else 1442 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1443} 1444 1445static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1446{ 1447 qc->dma_dir = DMA_NONE; 1448 qc->sg = NULL; 1449 qc->flags = 0; 1450 qc->cursg = NULL; 1451 qc->cursg_ofs = 0; 1452 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1453 qc->n_elem = 0; 1454 qc->err_mask = 0; 1455 qc->sect_size = ATA_SECT_SIZE; 1456 1457 ata_tf_init(qc->dev, &qc->tf); 1458 1459 /* init result_tf such that it indicates normal completion */ 1460 qc->result_tf.command = ATA_DRDY; 1461 qc->result_tf.feature = 0; 1462} 1463 1464static inline int ata_try_flush_cache(const struct ata_device *dev) 1465{ 1466 return ata_id_wcache_enabled(dev->id) || 1467 ata_id_has_flush(dev->id) || 1468 ata_id_has_flush_ext(dev->id); 1469} 1470 1471static inline unsigned int ac_err_mask(u8 status) 1472{ 1473 if (status & (ATA_BUSY | ATA_DRQ)) 1474 return AC_ERR_HSM; 1475 if (status & (ATA_ERR | ATA_DF)) 1476 return AC_ERR_DEV; 1477 return 0; 1478} 1479 1480static inline unsigned int __ac_err_mask(u8 status) 1481{ 1482 unsigned int mask = ac_err_mask(status); 1483 if (mask == 0) 1484 return AC_ERR_OTHER; 1485 return mask; 1486} 1487 1488static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1489{ 1490 return *(struct ata_port **)&host->hostdata[0]; 1491} 1492 1493static inline int ata_check_ready(u8 status) 1494{ 1495 if (!(status & ATA_BUSY)) 1496 return 1; 1497 1498 /* 0xff indicates either no device or device not ready */ 1499 if (status == 0xff) 1500 return -ENODEV; 1501 1502 return 0; 1503} 1504 1505static inline unsigned long ata_deadline(unsigned long from_jiffies, 1506 unsigned long timeout_msecs) 1507{ 1508 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1509} 1510 1511/* Don't open code these in drivers as there are traps. Firstly the range may 1512 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1513 > UDMA_0. Dyma ddreigiau */ 1514 1515static inline int ata_using_mwdma(struct ata_device *adev) 1516{ 1517 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1518 return 1; 1519 return 0; 1520} 1521 1522static inline int ata_using_udma(struct ata_device *adev) 1523{ 1524 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1525 return 1; 1526 return 0; 1527} 1528 1529static inline int ata_dma_enabled(struct ata_device *adev) 1530{ 1531 return (adev->dma_mode == 0xFF ? 0 : 1); 1532} 1533 1534/************************************************************************** 1535 * PMP - drivers/ata/libata-pmp.c 1536 */ 1537#ifdef CONFIG_SATA_PMP 1538 1539extern const struct ata_port_operations sata_pmp_port_ops; 1540 1541extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1542extern void sata_pmp_error_handler(struct ata_port *ap); 1543 1544#else /* CONFIG_SATA_PMP */ 1545 1546#define sata_pmp_port_ops sata_port_ops 1547#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1548#define sata_pmp_error_handler ata_std_error_handler 1549 1550#endif /* CONFIG_SATA_PMP */ 1551 1552 1553/************************************************************************** 1554 * SFF - drivers/ata/libata-sff.c 1555 */ 1556#ifdef CONFIG_ATA_SFF 1557 1558extern const struct ata_port_operations ata_sff_port_ops; 1559extern const struct ata_port_operations ata_bmdma_port_ops; 1560extern const struct ata_port_operations ata_bmdma32_port_ops; 1561 1562/* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1563#define ATA_PIO_SHT(drv_name) \ 1564 ATA_BASE_SHT(drv_name), \ 1565 .sg_tablesize = LIBATA_MAX_PRD, \ 1566 .dma_boundary = ATA_DMA_BOUNDARY 1567 1568#define ATA_BMDMA_SHT(drv_name) \ 1569 ATA_BASE_SHT(drv_name), \ 1570 .sg_tablesize = LIBATA_MAX_PRD, \ 1571 .dma_boundary = ATA_DMA_BOUNDARY 1572 1573extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1574extern u8 ata_sff_check_status(struct ata_port *ap); 1575extern void ata_sff_pause(struct ata_port *ap); 1576extern void ata_sff_dma_pause(struct ata_port *ap); 1577extern int ata_sff_busy_sleep(struct ata_port *ap, 1578 unsigned long timeout_pat, unsigned long timeout); 1579extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1580extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1581extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1582extern void ata_sff_exec_command(struct ata_port *ap, 1583 const struct ata_taskfile *tf); 1584extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1585 unsigned char *buf, unsigned int buflen, int rw); 1586extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1587 unsigned char *buf, unsigned int buflen, int rw); 1588extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1589 unsigned char *buf, unsigned int buflen, int rw); 1590extern void ata_sff_irq_on(struct ata_port *ap); 1591extern void ata_sff_irq_clear(struct ata_port *ap); 1592extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1593 u8 status, int in_wq); 1594extern void ata_sff_queue_pio_task(struct ata_port *ap, unsigned long delay); 1595extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1596extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1597extern unsigned int ata_sff_host_intr(struct ata_port *ap, 1598 struct ata_queued_cmd *qc); 1599extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1600extern void ata_sff_lost_interrupt(struct ata_port *ap); 1601extern void ata_sff_freeze(struct ata_port *ap); 1602extern void ata_sff_thaw(struct ata_port *ap); 1603extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1604extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1605 u8 *r_err); 1606extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1607 unsigned long deadline); 1608extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1609 unsigned long deadline); 1610extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1611 unsigned long deadline); 1612extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1613extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1614extern void ata_sff_error_handler(struct ata_port *ap); 1615extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1616#ifdef CONFIG_PCI 1617extern int ata_pci_sff_init_host(struct ata_host *host); 1618extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1619 const struct ata_port_info * const * ppi, 1620 struct ata_host **r_host); 1621extern int ata_pci_sff_activate_host(struct ata_host *host, 1622 irq_handler_t irq_handler, 1623 struct scsi_host_template *sht); 1624extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1625 const struct ata_port_info * const * ppi, 1626 struct scsi_host_template *sht, void *host_priv, int hflags); 1627#endif /* CONFIG_PCI */ 1628 1629extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc); 1630extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc); 1631extern void ata_bmdma_error_handler(struct ata_port *ap); 1632extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 1633extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1634extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1635extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1636extern u8 ata_bmdma_status(struct ata_port *ap); 1637extern int ata_bmdma_port_start(struct ata_port *ap); 1638extern int ata_bmdma_port_start32(struct ata_port *ap); 1639 1640#ifdef CONFIG_PCI 1641extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1642extern void ata_pci_bmdma_init(struct ata_host *host); 1643#endif /* CONFIG_PCI */ 1644 1645/** 1646 * ata_sff_busy_wait - Wait for a port status register 1647 * @ap: Port to wait for. 1648 * @bits: bits that must be clear 1649 * @max: number of 10uS waits to perform 1650 * 1651 * Waits up to max*10 microseconds for the selected bits in the port's 1652 * status register to be cleared. 1653 * Returns final value of status register. 1654 * 1655 * LOCKING: 1656 * Inherited from caller. 1657 */ 1658static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1659 unsigned int max) 1660{ 1661 u8 status; 1662 1663 do { 1664 udelay(10); 1665 status = ap->ops->sff_check_status(ap); 1666 max--; 1667 } while (status != 0xff && (status & bits) && (max > 0)); 1668 1669 return status; 1670} 1671 1672/** 1673 * ata_wait_idle - Wait for a port to be idle. 1674 * @ap: Port to wait for. 1675 * 1676 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1677 * Returns final value of status register. 1678 * 1679 * LOCKING: 1680 * Inherited from caller. 1681 */ 1682static inline u8 ata_wait_idle(struct ata_port *ap) 1683{ 1684 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1685 1686#ifdef ATA_DEBUG 1687 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1688 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1689 status); 1690#endif 1691 1692 return status; 1693} 1694#endif /* CONFIG_ATA_SFF */ 1695 1696#endif /* __LINUX_LIBATA_H__ */ 1697