libata.h revision 445d211b0da4e9a6e6d576edff85085c2aaf53df
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 /* The following flag belongs to ap->pflags but is kept in 206 * ap->flags because it's referenced in many LLDs and will be 207 * removed in not-too-distant future. 208 */ 209 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 210 211 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 212 213 214 /* struct ata_port pflags */ 215 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 216 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 217 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 218 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 219 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 220 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 221 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 222 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 223 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 224 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 225 226 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 227 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 228 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 229 230 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 231 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 232 233 /* struct ata_queued_cmd flags */ 234 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 235 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 236 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 237 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 238 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 239 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 240 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 241 242 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 243 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 244 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 245 246 /* host set flags */ 247 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 248 ATA_HOST_STARTED = (1 << 1), /* Host started */ 249 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 250 251 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 252 253 /* various lengths of time */ 254 ATA_TMOUT_BOOT = 30000, /* heuristic */ 255 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 256 ATA_TMOUT_INTERNAL_QUICK = 5000, 257 ATA_TMOUT_MAX_PARK = 30000, 258 259 /* FIXME: GoVault needs 2s but we can't afford that without 260 * parallel probing. 800ms is enough for iVDR disk 261 * HHD424020F7SV00. Increase to 2secs when parallel probing 262 * is in place. 263 */ 264 ATA_TMOUT_FF_WAIT = 800, 265 266 /* Spec mandates to wait for ">= 2ms" before checking status 267 * after reset. We wait 150ms, because that was the magic 268 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 269 * the period of time between when the ATA command register is 270 * written, and then status is checked. Because waiting for 271 * "a while" before checking status is fine, post SRST, we 272 * perform this magic delay here as well. 273 * 274 * Old drivers/ide uses the 2mS rule and then waits for ready. 275 */ 276 ATA_WAIT_AFTER_RESET = 150, 277 278 /* If PMP is supported, we have to do follow-up SRST. As some 279 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 280 * advised to wait only for the following duration before 281 * doing SRST. 282 */ 283 ATA_TMOUT_PMP_SRST_WAIT = 5000, 284 285 /* ATA bus states */ 286 BUS_UNKNOWN = 0, 287 BUS_DMA = 1, 288 BUS_IDLE = 2, 289 BUS_NOINTR = 3, 290 BUS_NODATA = 4, 291 BUS_TIMER = 5, 292 BUS_PIO = 6, 293 BUS_EDD = 7, 294 BUS_IDENTIFY = 8, 295 BUS_PACKET = 9, 296 297 /* SATA port states */ 298 PORT_UNKNOWN = 0, 299 PORT_ENABLED = 1, 300 PORT_DISABLED = 2, 301 302 /* encoding various smaller bitmaps into a single 303 * unsigned long bitmap 304 */ 305 ATA_NR_PIO_MODES = 7, 306 ATA_NR_MWDMA_MODES = 5, 307 ATA_NR_UDMA_MODES = 8, 308 309 ATA_SHIFT_PIO = 0, 310 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 311 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 312 313 /* size of buffer to pad xfers ending on unaligned boundaries */ 314 ATA_DMA_PAD_SZ = 4, 315 316 /* ering size */ 317 ATA_ERING_SIZE = 32, 318 319 /* return values for ->qc_defer */ 320 ATA_DEFER_LINK = 1, 321 ATA_DEFER_PORT = 2, 322 323 /* desc_len for ata_eh_info and context */ 324 ATA_EH_DESC_LEN = 80, 325 326 /* reset / recovery action types */ 327 ATA_EH_REVALIDATE = (1 << 0), 328 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 329 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 330 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 331 ATA_EH_ENABLE_LINK = (1 << 3), 332 ATA_EH_LPM = (1 << 4), /* link power management action */ 333 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 334 335 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 336 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 337 ATA_EH_ENABLE_LINK | ATA_EH_LPM, 338 339 /* ata_eh_info->flags */ 340 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 341 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 342 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 343 344 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 345 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 346 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 347 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 348 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 349 350 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 351 352 /* mask of flags to transfer *to* the slave link */ 353 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 354 355 /* max tries if error condition is still set after ->error_handler */ 356 ATA_EH_MAX_TRIES = 5, 357 358 /* sometimes resuming a link requires several retries */ 359 ATA_LINK_RESUME_TRIES = 5, 360 361 /* how hard are we gonna try to probe/recover devices */ 362 ATA_PROBE_MAX_TRIES = 3, 363 ATA_EH_DEV_TRIES = 3, 364 ATA_EH_PMP_TRIES = 5, 365 ATA_EH_PMP_LINK_TRIES = 3, 366 367 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 368 369 /* This should match the actual table size of 370 * ata_eh_cmd_timeout_table in libata-eh.c. 371 */ 372 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6, 373 374 /* Horkage types. May be set by libata or controller on drives 375 (some horkage may be drive/controller pair dependant */ 376 377 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 378 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 379 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 380 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 381 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 382 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 383 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 384 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */ 385 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 386 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 387 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 388 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 389 not multiple of 16 bytes */ 390 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */ 391 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 392 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ 393 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ 394 395 /* DMA mask for user DMA control: User visible values; DO NOT 396 renumber */ 397 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 398 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 399 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 400 401 /* ATAPI command types */ 402 ATAPI_READ = 0, /* READs */ 403 ATAPI_WRITE = 1, /* WRITEs */ 404 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 405 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 406 ATAPI_MISC = 4, /* the rest */ 407 408 /* Timing constants */ 409 ATA_TIMING_SETUP = (1 << 0), 410 ATA_TIMING_ACT8B = (1 << 1), 411 ATA_TIMING_REC8B = (1 << 2), 412 ATA_TIMING_CYC8B = (1 << 3), 413 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 414 ATA_TIMING_CYC8B, 415 ATA_TIMING_ACTIVE = (1 << 4), 416 ATA_TIMING_RECOVER = (1 << 5), 417 ATA_TIMING_DMACK_HOLD = (1 << 6), 418 ATA_TIMING_CYCLE = (1 << 7), 419 ATA_TIMING_UDMA = (1 << 8), 420 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 421 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 422 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 423 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 424 ATA_TIMING_UDMA, 425 426 /* ACPI constants */ 427 ATA_ACPI_FILTER_SETXFER = 1 << 0, 428 ATA_ACPI_FILTER_LOCK = 1 << 1, 429 ATA_ACPI_FILTER_DIPM = 1 << 2, 430 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 431 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 432 433 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 434 ATA_ACPI_FILTER_LOCK | 435 ATA_ACPI_FILTER_DIPM, 436}; 437 438enum ata_xfer_mask { 439 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 440 << ATA_SHIFT_PIO, 441 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 442 << ATA_SHIFT_MWDMA, 443 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 444 << ATA_SHIFT_UDMA, 445}; 446 447enum hsm_task_states { 448 HSM_ST_IDLE, /* no command on going */ 449 HSM_ST_FIRST, /* (waiting the device to) 450 write CDB or first data block */ 451 HSM_ST, /* (waiting the device to) transfer data */ 452 HSM_ST_LAST, /* (waiting the device to) complete command */ 453 HSM_ST_ERR, /* error */ 454}; 455 456enum ata_completion_errors { 457 AC_ERR_DEV = (1 << 0), /* device reported error */ 458 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 459 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 460 AC_ERR_MEDIA = (1 << 3), /* media error */ 461 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 462 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 463 AC_ERR_SYSTEM = (1 << 6), /* system error */ 464 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 465 AC_ERR_OTHER = (1 << 8), /* unknown */ 466 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 467 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 468}; 469 470/* forward declarations */ 471struct scsi_device; 472struct ata_port_operations; 473struct ata_port; 474struct ata_link; 475struct ata_queued_cmd; 476 477/* typedefs */ 478typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 479typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 480typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 481 unsigned long deadline); 482typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 483 484/* 485 * host pm policy: If you alter this, you also need to alter libata-scsi.c 486 * (for the ascii descriptions) 487 */ 488enum link_pm { 489 NOT_AVAILABLE, 490 MIN_POWER, 491 MAX_PERFORMANCE, 492 MEDIUM_POWER, 493}; 494extern struct device_attribute dev_attr_link_power_management_policy; 495extern struct device_attribute dev_attr_unload_heads; 496extern struct device_attribute dev_attr_em_message_type; 497extern struct device_attribute dev_attr_em_message; 498extern struct device_attribute dev_attr_sw_activity; 499 500enum sw_activity { 501 OFF, 502 BLINK_ON, 503 BLINK_OFF, 504}; 505 506#ifdef CONFIG_ATA_SFF 507struct ata_ioports { 508 void __iomem *cmd_addr; 509 void __iomem *data_addr; 510 void __iomem *error_addr; 511 void __iomem *feature_addr; 512 void __iomem *nsect_addr; 513 void __iomem *lbal_addr; 514 void __iomem *lbam_addr; 515 void __iomem *lbah_addr; 516 void __iomem *device_addr; 517 void __iomem *status_addr; 518 void __iomem *command_addr; 519 void __iomem *altstatus_addr; 520 void __iomem *ctl_addr; 521 void __iomem *bmdma_addr; 522 void __iomem *scr_addr; 523}; 524#endif /* CONFIG_ATA_SFF */ 525 526struct ata_host { 527 spinlock_t lock; 528 struct device *dev; 529 void __iomem * const *iomap; 530 unsigned int n_ports; 531 void *private_data; 532 struct ata_port_operations *ops; 533 unsigned long flags; 534#ifdef CONFIG_ATA_ACPI 535 acpi_handle acpi_handle; 536#endif 537 struct ata_port *simplex_claimed; /* channel owning the DMA */ 538 struct ata_port *ports[0]; 539}; 540 541struct ata_queued_cmd { 542 struct ata_port *ap; 543 struct ata_device *dev; 544 545 struct scsi_cmnd *scsicmd; 546 void (*scsidone)(struct scsi_cmnd *); 547 548 struct ata_taskfile tf; 549 u8 cdb[ATAPI_CDB_LEN]; 550 551 unsigned long flags; /* ATA_QCFLAG_xxx */ 552 unsigned int tag; 553 unsigned int n_elem; 554 unsigned int orig_n_elem; 555 556 int dma_dir; 557 558 unsigned int sect_size; 559 560 unsigned int nbytes; 561 unsigned int extrabytes; 562 unsigned int curbytes; 563 564 struct scatterlist *cursg; 565 unsigned int cursg_ofs; 566 567 struct scatterlist sgent; 568 569 struct scatterlist *sg; 570 571 unsigned int err_mask; 572 struct ata_taskfile result_tf; 573 ata_qc_cb_t complete_fn; 574 575 void *private_data; 576 void *lldd_task; 577}; 578 579struct ata_port_stats { 580 unsigned long unhandled_irq; 581 unsigned long idle_irq; 582 unsigned long rw_reqbuf; 583}; 584 585struct ata_ering_entry { 586 unsigned int eflags; 587 unsigned int err_mask; 588 u64 timestamp; 589}; 590 591struct ata_ering { 592 int cursor; 593 struct ata_ering_entry ring[ATA_ERING_SIZE]; 594}; 595 596struct ata_device { 597 struct ata_link *link; 598 unsigned int devno; /* 0 or 1 */ 599 unsigned int horkage; /* List of broken features */ 600 unsigned long flags; /* ATA_DFLAG_xxx */ 601 struct scsi_device *sdev; /* attached SCSI device */ 602 void *private_data; 603#ifdef CONFIG_ATA_ACPI 604 acpi_handle acpi_handle; 605 union acpi_object *gtf_cache; 606 unsigned int gtf_filter; 607#endif 608 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 609 u64 n_sectors; /* size of device, if ATA */ 610 u64 n_native_sectors; /* native size, if ATA */ 611 unsigned int class; /* ATA_DEV_xxx */ 612 unsigned long unpark_deadline; 613 614 u8 pio_mode; 615 u8 dma_mode; 616 u8 xfer_mode; 617 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 618 619 unsigned int multi_count; /* sectors count for 620 READ/WRITE MULTIPLE */ 621 unsigned int max_sectors; /* per-device max sectors */ 622 unsigned int cdb_len; 623 624 /* per-dev xfer mask */ 625 unsigned long pio_mask; 626 unsigned long mwdma_mask; 627 unsigned long udma_mask; 628 629 /* for CHS addressing */ 630 u16 cylinders; /* Number of cylinders */ 631 u16 heads; /* Number of heads */ 632 u16 sectors; /* Number of sectors per track */ 633 634 union { 635 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 636 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 637 }; 638 639 /* error history */ 640 int spdn_cnt; 641 /* ering is CLEAR_END, read comment above CLEAR_END */ 642 struct ata_ering ering; 643}; 644 645/* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 646 * cleared to zero on ata_dev_init(). 647 */ 648#define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 649#define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 650 651struct ata_eh_info { 652 struct ata_device *dev; /* offending device */ 653 u32 serror; /* SError from LLDD */ 654 unsigned int err_mask; /* port-wide err_mask */ 655 unsigned int action; /* ATA_EH_* action mask */ 656 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 657 unsigned int flags; /* ATA_EHI_* flags */ 658 659 unsigned int probe_mask; 660 661 char desc[ATA_EH_DESC_LEN]; 662 int desc_len; 663}; 664 665struct ata_eh_context { 666 struct ata_eh_info i; 667 int tries[ATA_MAX_DEVICES]; 668 int cmd_timeout_idx[ATA_MAX_DEVICES] 669 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 670 unsigned int classes[ATA_MAX_DEVICES]; 671 unsigned int did_probe_mask; 672 unsigned int unloaded_mask; 673 unsigned int saved_ncq_enabled; 674 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 675 /* timestamp for the last reset attempt or success */ 676 unsigned long last_reset; 677}; 678 679struct ata_acpi_drive 680{ 681 u32 pio; 682 u32 dma; 683} __packed; 684 685struct ata_acpi_gtm { 686 struct ata_acpi_drive drive[2]; 687 u32 flags; 688} __packed; 689 690struct ata_link { 691 struct ata_port *ap; 692 int pmp; /* port multiplier port # */ 693 694 unsigned int active_tag; /* active tag on this link */ 695 u32 sactive; /* active NCQ commands */ 696 697 unsigned int flags; /* ATA_LFLAG_xxx */ 698 699 u32 saved_scontrol; /* SControl on probe */ 700 unsigned int hw_sata_spd_limit; 701 unsigned int sata_spd_limit; 702 unsigned int sata_spd; /* current SATA PHY speed */ 703 704 /* record runtime error info, protected by host_set lock */ 705 struct ata_eh_info eh_info; 706 /* EH context */ 707 struct ata_eh_context eh_context; 708 709 struct ata_device device[ATA_MAX_DEVICES]; 710}; 711 712struct ata_port { 713 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 714 struct ata_port_operations *ops; 715 spinlock_t *lock; 716 /* Flags owned by the EH context. Only EH should touch these once the 717 port is active */ 718 unsigned long flags; /* ATA_FLAG_xxx */ 719 /* Flags that change dynamically, protected by ap->lock */ 720 unsigned int pflags; /* ATA_PFLAG_xxx */ 721 unsigned int print_id; /* user visible unique port ID */ 722 unsigned int port_no; /* 0 based port no. inside the host */ 723 724 struct ata_prd *prd; /* our SG list */ 725 dma_addr_t prd_dma; /* and its DMA mapping */ 726 727#ifdef CONFIG_ATA_SFF 728 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 729#endif /* CONFIG_ATA_SFF */ 730 731 u8 ctl; /* cache of ATA control register */ 732 u8 last_ctl; /* Cache last written value */ 733 unsigned int pio_mask; 734 unsigned int mwdma_mask; 735 unsigned int udma_mask; 736 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 737 738 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 739 unsigned long qc_allocated; 740 unsigned int qc_active; 741 int nr_active_links; /* #links with active qcs */ 742 743 struct ata_link link; /* host default link */ 744 struct ata_link *slave_link; /* see ata_slave_link_init() */ 745 746 int nr_pmp_links; /* nr of available PMP links */ 747 struct ata_link *pmp_link; /* array of PMP links */ 748 struct ata_link *excl_link; /* for PMP qc exclusion */ 749 750 struct ata_port_stats stats; 751 struct ata_host *host; 752 struct device *dev; 753 754 void *port_task_data; 755 struct delayed_work port_task; 756 struct delayed_work hotplug_task; 757 struct work_struct scsi_rescan_task; 758 759 unsigned int hsm_task_state; 760 761 u32 msg_enable; 762 struct list_head eh_done_q; 763 wait_queue_head_t eh_wait_q; 764 int eh_tries; 765 struct completion park_req_pending; 766 767 pm_message_t pm_mesg; 768 int *pm_result; 769 enum link_pm pm_policy; 770 771 struct timer_list fastdrain_timer; 772 unsigned long fastdrain_cnt; 773 774 int em_message_type; 775 void *private_data; 776 777#ifdef CONFIG_ATA_ACPI 778 acpi_handle acpi_handle; 779 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 780#endif 781 /* owned by EH */ 782 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 783}; 784 785/* The following initializer overrides a method to NULL whether one of 786 * its parent has the method defined or not. This is equivalent to 787 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 788 * expression and thus can't be used as an initializer. 789 */ 790#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 791 792struct ata_port_operations { 793 /* 794 * Command execution 795 */ 796 int (*qc_defer)(struct ata_queued_cmd *qc); 797 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 798 void (*qc_prep)(struct ata_queued_cmd *qc); 799 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 800 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 801 802 /* 803 * Configuration and exception handling 804 */ 805 int (*cable_detect)(struct ata_port *ap); 806 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 807 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 808 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 809 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 810 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 811 812 void (*dev_config)(struct ata_device *dev); 813 814 void (*freeze)(struct ata_port *ap); 815 void (*thaw)(struct ata_port *ap); 816 ata_prereset_fn_t prereset; 817 ata_reset_fn_t softreset; 818 ata_reset_fn_t hardreset; 819 ata_postreset_fn_t postreset; 820 ata_prereset_fn_t pmp_prereset; 821 ata_reset_fn_t pmp_softreset; 822 ata_reset_fn_t pmp_hardreset; 823 ata_postreset_fn_t pmp_postreset; 824 void (*error_handler)(struct ata_port *ap); 825 void (*lost_interrupt)(struct ata_port *ap); 826 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 827 828 /* 829 * Optional features 830 */ 831 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 832 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 833 void (*pmp_attach)(struct ata_port *ap); 834 void (*pmp_detach)(struct ata_port *ap); 835 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 836 void (*disable_pm)(struct ata_port *ap); 837 838 /* 839 * Start, stop, suspend and resume 840 */ 841 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 842 int (*port_resume)(struct ata_port *ap); 843 int (*port_start)(struct ata_port *ap); 844 void (*port_stop)(struct ata_port *ap); 845 void (*host_stop)(struct ata_host *host); 846 847#ifdef CONFIG_ATA_SFF 848 /* 849 * SFF / taskfile oriented ops 850 */ 851 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 852 u8 (*sff_check_status)(struct ata_port *ap); 853 u8 (*sff_check_altstatus)(struct ata_port *ap); 854 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 855 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 856 void (*sff_exec_command)(struct ata_port *ap, 857 const struct ata_taskfile *tf); 858 unsigned int (*sff_data_xfer)(struct ata_device *dev, 859 unsigned char *buf, unsigned int buflen, int rw); 860 u8 (*sff_irq_on)(struct ata_port *); 861 bool (*sff_irq_check)(struct ata_port *); 862 void (*sff_irq_clear)(struct ata_port *); 863 864 void (*bmdma_setup)(struct ata_queued_cmd *qc); 865 void (*bmdma_start)(struct ata_queued_cmd *qc); 866 void (*bmdma_stop)(struct ata_queued_cmd *qc); 867 u8 (*bmdma_status)(struct ata_port *ap); 868 869 void (*drain_fifo)(struct ata_queued_cmd *qc); 870#endif /* CONFIG_ATA_SFF */ 871 872 ssize_t (*em_show)(struct ata_port *ap, char *buf); 873 ssize_t (*em_store)(struct ata_port *ap, const char *message, 874 size_t size); 875 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 876 ssize_t (*sw_activity_store)(struct ata_device *dev, 877 enum sw_activity val); 878 /* 879 * Obsolete 880 */ 881 void (*phy_reset)(struct ata_port *ap); 882 void (*eng_timeout)(struct ata_port *ap); 883 884 /* 885 * ->inherits must be the last field and all the preceding 886 * fields must be pointers. 887 */ 888 const struct ata_port_operations *inherits; 889}; 890 891struct ata_port_info { 892 unsigned long flags; 893 unsigned long link_flags; 894 unsigned long pio_mask; 895 unsigned long mwdma_mask; 896 unsigned long udma_mask; 897 struct ata_port_operations *port_ops; 898 void *private_data; 899}; 900 901struct ata_timing { 902 unsigned short mode; /* ATA mode */ 903 unsigned short setup; /* t1 */ 904 unsigned short act8b; /* t2 for 8-bit I/O */ 905 unsigned short rec8b; /* t2i for 8-bit I/O */ 906 unsigned short cyc8b; /* t0 for 8-bit I/O */ 907 unsigned short active; /* t2 or tD */ 908 unsigned short recover; /* t2i or tK */ 909 unsigned short dmack_hold; /* tj */ 910 unsigned short cycle; /* t0 */ 911 unsigned short udma; /* t2CYCTYP/2 */ 912}; 913 914/* 915 * Core layer - drivers/ata/libata-core.c 916 */ 917extern const unsigned long sata_deb_timing_normal[]; 918extern const unsigned long sata_deb_timing_hotplug[]; 919extern const unsigned long sata_deb_timing_long[]; 920 921extern struct ata_port_operations ata_dummy_port_ops; 922extern const struct ata_port_info ata_dummy_port_info; 923 924static inline const unsigned long * 925sata_ehc_deb_timing(struct ata_eh_context *ehc) 926{ 927 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 928 return sata_deb_timing_hotplug; 929 else 930 return sata_deb_timing_normal; 931} 932 933static inline int ata_port_is_dummy(struct ata_port *ap) 934{ 935 return ap->ops == &ata_dummy_port_ops; 936} 937 938extern void ata_port_probe(struct ata_port *); 939extern int sata_set_spd(struct ata_link *link); 940extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 941extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 942 int (*check_ready)(struct ata_link *link)); 943extern int sata_link_debounce(struct ata_link *link, 944 const unsigned long *params, unsigned long deadline); 945extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 946 unsigned long deadline); 947extern int sata_link_hardreset(struct ata_link *link, 948 const unsigned long *timing, unsigned long deadline, 949 bool *online, int (*check_ready)(struct ata_link *)); 950extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 951 unsigned long deadline); 952extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 953extern void ata_port_disable(struct ata_port *); 954 955extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 956extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 957 const struct ata_port_info * const * ppi, int n_ports); 958extern int ata_slave_link_init(struct ata_port *ap); 959extern int ata_host_start(struct ata_host *host); 960extern int ata_host_register(struct ata_host *host, 961 struct scsi_host_template *sht); 962extern int ata_host_activate(struct ata_host *host, int irq, 963 irq_handler_t irq_handler, unsigned long irq_flags, 964 struct scsi_host_template *sht); 965extern void ata_host_detach(struct ata_host *host); 966extern void ata_host_init(struct ata_host *, struct device *, 967 unsigned long, struct ata_port_operations *); 968extern int ata_scsi_detect(struct scsi_host_template *sht); 969extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 970extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 971extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 972 int cmd, void __user *arg); 973extern void ata_sas_port_destroy(struct ata_port *); 974extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 975 struct ata_port_info *, struct Scsi_Host *); 976extern int ata_sas_port_init(struct ata_port *); 977extern int ata_sas_port_start(struct ata_port *ap); 978extern void ata_sas_port_stop(struct ata_port *ap); 979extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 980extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 981 struct ata_port *ap); 982extern int sata_scr_valid(struct ata_link *link); 983extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 984extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 985extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 986extern bool ata_link_online(struct ata_link *link); 987extern bool ata_link_offline(struct ata_link *link); 988#ifdef CONFIG_PM 989extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 990extern void ata_host_resume(struct ata_host *host); 991#endif 992extern int ata_ratelimit(void); 993extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 994 unsigned long interval, unsigned long timeout); 995extern int atapi_cmd_type(u8 opcode); 996extern void ata_tf_to_fis(const struct ata_taskfile *tf, 997 u8 pmp, int is_cmd, u8 *fis); 998extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 999extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 1000 unsigned long mwdma_mask, unsigned long udma_mask); 1001extern void ata_unpack_xfermask(unsigned long xfer_mask, 1002 unsigned long *pio_mask, unsigned long *mwdma_mask, 1003 unsigned long *udma_mask); 1004extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 1005extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 1006extern int ata_xfer_mode2shift(unsigned long xfer_mode); 1007extern const char *ata_mode_string(unsigned long xfer_mask); 1008extern unsigned long ata_id_xfermask(const u16 *id); 1009extern int ata_port_start(struct ata_port *ap); 1010extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1011extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 1012extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1013 unsigned int n_elem); 1014extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1015extern void ata_dev_disable(struct ata_device *adev); 1016extern void ata_id_string(const u16 *id, unsigned char *s, 1017 unsigned int ofs, unsigned int len); 1018extern void ata_id_c_string(const u16 *id, unsigned char *s, 1019 unsigned int ofs, unsigned int len); 1020extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1021 struct ata_taskfile *tf, u16 *id); 1022extern void ata_qc_complete(struct ata_queued_cmd *qc); 1023extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 1024extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 1025 void (*done)(struct scsi_cmnd *)); 1026extern int ata_std_bios_param(struct scsi_device *sdev, 1027 struct block_device *bdev, 1028 sector_t capacity, int geom[]); 1029extern int ata_scsi_slave_config(struct scsi_device *sdev); 1030extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1031extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1032 int queue_depth, int reason); 1033extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1034extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1035 1036extern int ata_cable_40wire(struct ata_port *ap); 1037extern int ata_cable_80wire(struct ata_port *ap); 1038extern int ata_cable_sata(struct ata_port *ap); 1039extern int ata_cable_ignore(struct ata_port *ap); 1040extern int ata_cable_unknown(struct ata_port *ap); 1041 1042extern void ata_pio_queue_task(struct ata_port *ap, void *data, 1043 unsigned long delay); 1044 1045/* Timing helpers */ 1046extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1047extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1048extern int ata_timing_compute(struct ata_device *, unsigned short, 1049 struct ata_timing *, int, int); 1050extern void ata_timing_merge(const struct ata_timing *, 1051 const struct ata_timing *, struct ata_timing *, 1052 unsigned int); 1053extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1054 1055/* PCI */ 1056#ifdef CONFIG_PCI 1057struct pci_dev; 1058 1059struct pci_bits { 1060 unsigned int reg; /* PCI config register to read */ 1061 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1062 unsigned long mask; 1063 unsigned long val; 1064}; 1065 1066extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1067extern void ata_pci_remove_one(struct pci_dev *pdev); 1068 1069#ifdef CONFIG_PM 1070extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1071extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1072extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1073extern int ata_pci_device_resume(struct pci_dev *pdev); 1074#endif /* CONFIG_PM */ 1075#endif /* CONFIG_PCI */ 1076 1077/* 1078 * ACPI - drivers/ata/libata-acpi.c 1079 */ 1080#ifdef CONFIG_ATA_ACPI 1081static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1082{ 1083 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1084 return &ap->__acpi_init_gtm; 1085 return NULL; 1086} 1087int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1088int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1089unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1090 const struct ata_acpi_gtm *gtm); 1091int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1092#else 1093static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1094{ 1095 return NULL; 1096} 1097 1098static inline int ata_acpi_stm(const struct ata_port *ap, 1099 struct ata_acpi_gtm *stm) 1100{ 1101 return -ENOSYS; 1102} 1103 1104static inline int ata_acpi_gtm(const struct ata_port *ap, 1105 struct ata_acpi_gtm *stm) 1106{ 1107 return -ENOSYS; 1108} 1109 1110static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1111 const struct ata_acpi_gtm *gtm) 1112{ 1113 return 0; 1114} 1115 1116static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1117 const struct ata_acpi_gtm *gtm) 1118{ 1119 return 0; 1120} 1121#endif 1122 1123/* 1124 * EH - drivers/ata/libata-eh.c 1125 */ 1126extern void ata_port_schedule_eh(struct ata_port *ap); 1127extern int ata_link_abort(struct ata_link *link); 1128extern int ata_port_abort(struct ata_port *ap); 1129extern int ata_port_freeze(struct ata_port *ap); 1130extern int sata_async_notification(struct ata_port *ap); 1131 1132extern void ata_eh_freeze_port(struct ata_port *ap); 1133extern void ata_eh_thaw_port(struct ata_port *ap); 1134 1135extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1136extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1137extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1138 1139extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1140 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1141 ata_postreset_fn_t postreset); 1142extern void ata_std_error_handler(struct ata_port *ap); 1143 1144/* 1145 * Base operations to inherit from and initializers for sht 1146 * 1147 * Operations 1148 * 1149 * base : Common to all libata drivers. 1150 * sata : SATA controllers w/ native interface. 1151 * pmp : SATA controllers w/ PMP support. 1152 * sff : SFF ATA controllers w/o BMDMA support. 1153 * bmdma : SFF ATA controllers w/ BMDMA support. 1154 * 1155 * sht initializers 1156 * 1157 * BASE : Common to all libata drivers. The user must set 1158 * sg_tablesize and dma_boundary. 1159 * PIO : SFF ATA controllers w/ only PIO support. 1160 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1161 * dma_boundary are set to BMDMA limits. 1162 * NCQ : SATA controllers supporting NCQ. The user must set 1163 * sg_tablesize, dma_boundary and can_queue. 1164 */ 1165extern const struct ata_port_operations ata_base_port_ops; 1166extern const struct ata_port_operations sata_port_ops; 1167extern struct device_attribute *ata_common_sdev_attrs[]; 1168 1169#define ATA_BASE_SHT(drv_name) \ 1170 .module = THIS_MODULE, \ 1171 .name = drv_name, \ 1172 .ioctl = ata_scsi_ioctl, \ 1173 .queuecommand = ata_scsi_queuecmd, \ 1174 .can_queue = ATA_DEF_QUEUE, \ 1175 .this_id = ATA_SHT_THIS_ID, \ 1176 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1177 .emulated = ATA_SHT_EMULATED, \ 1178 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1179 .proc_name = drv_name, \ 1180 .slave_configure = ata_scsi_slave_config, \ 1181 .slave_destroy = ata_scsi_slave_destroy, \ 1182 .bios_param = ata_std_bios_param, \ 1183 .sdev_attrs = ata_common_sdev_attrs 1184 1185#define ATA_NCQ_SHT(drv_name) \ 1186 ATA_BASE_SHT(drv_name), \ 1187 .change_queue_depth = ata_scsi_change_queue_depth 1188 1189/* 1190 * PMP helpers 1191 */ 1192#ifdef CONFIG_SATA_PMP 1193static inline bool sata_pmp_supported(struct ata_port *ap) 1194{ 1195 return ap->flags & ATA_FLAG_PMP; 1196} 1197 1198static inline bool sata_pmp_attached(struct ata_port *ap) 1199{ 1200 return ap->nr_pmp_links != 0; 1201} 1202 1203static inline int ata_is_host_link(const struct ata_link *link) 1204{ 1205 return link == &link->ap->link || link == link->ap->slave_link; 1206} 1207#else /* CONFIG_SATA_PMP */ 1208static inline bool sata_pmp_supported(struct ata_port *ap) 1209{ 1210 return false; 1211} 1212 1213static inline bool sata_pmp_attached(struct ata_port *ap) 1214{ 1215 return false; 1216} 1217 1218static inline int ata_is_host_link(const struct ata_link *link) 1219{ 1220 return 1; 1221} 1222#endif /* CONFIG_SATA_PMP */ 1223 1224static inline int sata_srst_pmp(struct ata_link *link) 1225{ 1226 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1227 return SATA_PMP_CTRL_PORT; 1228 return link->pmp; 1229} 1230 1231/* 1232 * printk helpers 1233 */ 1234#define ata_port_printk(ap, lv, fmt, args...) \ 1235 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1236 1237#define ata_link_printk(link, lv, fmt, args...) do { \ 1238 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1239 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1240 (link)->pmp , ##args); \ 1241 else \ 1242 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1243 } while(0) 1244 1245#define ata_dev_printk(dev, lv, fmt, args...) \ 1246 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1247 (dev)->link->pmp + (dev)->devno , ##args) 1248 1249/* 1250 * ata_eh_info helpers 1251 */ 1252extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1253 __attribute__ ((format (printf, 2, 3))); 1254extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1255 __attribute__ ((format (printf, 2, 3))); 1256extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1257 1258static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1259{ 1260 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1261 ehi->flags |= ATA_EHI_HOTPLUGGED; 1262 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1263 ehi->err_mask |= AC_ERR_ATA_BUS; 1264} 1265 1266/* 1267 * port description helpers 1268 */ 1269extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1270 __attribute__ ((format (printf, 2, 3))); 1271#ifdef CONFIG_PCI 1272extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1273 const char *name); 1274#endif 1275 1276static inline unsigned int ata_tag_valid(unsigned int tag) 1277{ 1278 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1279} 1280 1281static inline unsigned int ata_tag_internal(unsigned int tag) 1282{ 1283 return tag == ATA_TAG_INTERNAL; 1284} 1285 1286/* 1287 * device helpers 1288 */ 1289static inline unsigned int ata_class_enabled(unsigned int class) 1290{ 1291 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1292 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1293} 1294 1295static inline unsigned int ata_class_disabled(unsigned int class) 1296{ 1297 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1298 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1299} 1300 1301static inline unsigned int ata_class_absent(unsigned int class) 1302{ 1303 return !ata_class_enabled(class) && !ata_class_disabled(class); 1304} 1305 1306static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1307{ 1308 return ata_class_enabled(dev->class); 1309} 1310 1311static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1312{ 1313 return ata_class_disabled(dev->class); 1314} 1315 1316static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1317{ 1318 return ata_class_absent(dev->class); 1319} 1320 1321/* 1322 * link helpers 1323 */ 1324static inline int ata_link_max_devices(const struct ata_link *link) 1325{ 1326 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1327 return 2; 1328 return 1; 1329} 1330 1331static inline int ata_link_active(struct ata_link *link) 1332{ 1333 return ata_tag_valid(link->active_tag) || link->sactive; 1334} 1335 1336/* 1337 * Iterators 1338 * 1339 * ATA_LITER_* constants are used to select link iteration mode and 1340 * ATA_DITER_* device iteration mode. 1341 * 1342 * For a custom iteration directly using ata_{link|dev}_next(), if 1343 * @link or @dev, respectively, is NULL, the first element is 1344 * returned. @dev and @link can be any valid device or link and the 1345 * next element according to the iteration mode will be returned. 1346 * After the last element, NULL is returned. 1347 */ 1348enum ata_link_iter_mode { 1349 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1350 * host link. no slave link */ 1351 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1352 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1353 * slave link still comes after host link */ 1354}; 1355 1356enum ata_dev_iter_mode { 1357 ATA_DITER_ENABLED, 1358 ATA_DITER_ENABLED_REVERSE, 1359 ATA_DITER_ALL, 1360 ATA_DITER_ALL_REVERSE, 1361}; 1362 1363extern struct ata_link *ata_link_next(struct ata_link *link, 1364 struct ata_port *ap, 1365 enum ata_link_iter_mode mode); 1366 1367extern struct ata_device *ata_dev_next(struct ata_device *dev, 1368 struct ata_link *link, 1369 enum ata_dev_iter_mode mode); 1370 1371/* 1372 * Shortcut notation for iterations 1373 * 1374 * ata_for_each_link() iterates over each link of @ap according to 1375 * @mode. @link points to the current link in the loop. @link is 1376 * NULL after loop termination. ata_for_each_dev() works the same way 1377 * except that it iterates over each device of @link. 1378 * 1379 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1380 * specified when using the following shorthand notations. Only the 1381 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1382 * specified. This not only increases brevity but also makes it 1383 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1384 */ 1385#define ata_for_each_link(link, ap, mode) \ 1386 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1387 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1388 1389#define ata_for_each_dev(dev, link, mode) \ 1390 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1391 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1392 1393/** 1394 * ata_ncq_enabled - Test whether NCQ is enabled 1395 * @dev: ATA device to test for 1396 * 1397 * LOCKING: 1398 * spin_lock_irqsave(host lock) 1399 * 1400 * RETURNS: 1401 * 1 if NCQ is enabled for @dev, 0 otherwise. 1402 */ 1403static inline int ata_ncq_enabled(struct ata_device *dev) 1404{ 1405 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1406 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1407} 1408 1409static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1410{ 1411 qc->tf.ctl |= ATA_NIEN; 1412} 1413 1414static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1415 unsigned int tag) 1416{ 1417 if (likely(ata_tag_valid(tag))) 1418 return &ap->qcmd[tag]; 1419 return NULL; 1420} 1421 1422static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1423 unsigned int tag) 1424{ 1425 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1426 1427 if (unlikely(!qc) || !ap->ops->error_handler) 1428 return qc; 1429 1430 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1431 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1432 return qc; 1433 1434 return NULL; 1435} 1436 1437static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1438{ 1439 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1440} 1441 1442static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1443{ 1444 memset(tf, 0, sizeof(*tf)); 1445 1446 tf->ctl = dev->link->ap->ctl; 1447 if (dev->devno == 0) 1448 tf->device = ATA_DEVICE_OBS; 1449 else 1450 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1451} 1452 1453static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1454{ 1455 qc->dma_dir = DMA_NONE; 1456 qc->sg = NULL; 1457 qc->flags = 0; 1458 qc->cursg = NULL; 1459 qc->cursg_ofs = 0; 1460 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1461 qc->n_elem = 0; 1462 qc->err_mask = 0; 1463 qc->sect_size = ATA_SECT_SIZE; 1464 1465 ata_tf_init(qc->dev, &qc->tf); 1466 1467 /* init result_tf such that it indicates normal completion */ 1468 qc->result_tf.command = ATA_DRDY; 1469 qc->result_tf.feature = 0; 1470} 1471 1472static inline int ata_try_flush_cache(const struct ata_device *dev) 1473{ 1474 return ata_id_wcache_enabled(dev->id) || 1475 ata_id_has_flush(dev->id) || 1476 ata_id_has_flush_ext(dev->id); 1477} 1478 1479static inline unsigned int ac_err_mask(u8 status) 1480{ 1481 if (status & (ATA_BUSY | ATA_DRQ)) 1482 return AC_ERR_HSM; 1483 if (status & (ATA_ERR | ATA_DF)) 1484 return AC_ERR_DEV; 1485 return 0; 1486} 1487 1488static inline unsigned int __ac_err_mask(u8 status) 1489{ 1490 unsigned int mask = ac_err_mask(status); 1491 if (mask == 0) 1492 return AC_ERR_OTHER; 1493 return mask; 1494} 1495 1496static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1497{ 1498 return *(struct ata_port **)&host->hostdata[0]; 1499} 1500 1501static inline int ata_check_ready(u8 status) 1502{ 1503 if (!(status & ATA_BUSY)) 1504 return 1; 1505 1506 /* 0xff indicates either no device or device not ready */ 1507 if (status == 0xff) 1508 return -ENODEV; 1509 1510 return 0; 1511} 1512 1513static inline unsigned long ata_deadline(unsigned long from_jiffies, 1514 unsigned long timeout_msecs) 1515{ 1516 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1517} 1518 1519/* Don't open code these in drivers as there are traps. Firstly the range may 1520 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1521 > UDMA_0. Dyma ddreigiau */ 1522 1523static inline int ata_using_mwdma(struct ata_device *adev) 1524{ 1525 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1526 return 1; 1527 return 0; 1528} 1529 1530static inline int ata_using_udma(struct ata_device *adev) 1531{ 1532 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1533 return 1; 1534 return 0; 1535} 1536 1537static inline int ata_dma_enabled(struct ata_device *adev) 1538{ 1539 return (adev->dma_mode == 0xFF ? 0 : 1); 1540} 1541 1542/************************************************************************** 1543 * PMP - drivers/ata/libata-pmp.c 1544 */ 1545#ifdef CONFIG_SATA_PMP 1546 1547extern const struct ata_port_operations sata_pmp_port_ops; 1548 1549extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1550extern void sata_pmp_error_handler(struct ata_port *ap); 1551 1552#else /* CONFIG_SATA_PMP */ 1553 1554#define sata_pmp_port_ops sata_port_ops 1555#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1556#define sata_pmp_error_handler ata_std_error_handler 1557 1558#endif /* CONFIG_SATA_PMP */ 1559 1560 1561/************************************************************************** 1562 * SFF - drivers/ata/libata-sff.c 1563 */ 1564#ifdef CONFIG_ATA_SFF 1565 1566extern const struct ata_port_operations ata_sff_port_ops; 1567extern const struct ata_port_operations ata_bmdma_port_ops; 1568extern const struct ata_port_operations ata_bmdma32_port_ops; 1569 1570/* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1571#define ATA_PIO_SHT(drv_name) \ 1572 ATA_BASE_SHT(drv_name), \ 1573 .sg_tablesize = LIBATA_MAX_PRD, \ 1574 .dma_boundary = ATA_DMA_BOUNDARY 1575 1576#define ATA_BMDMA_SHT(drv_name) \ 1577 ATA_BASE_SHT(drv_name), \ 1578 .sg_tablesize = LIBATA_MAX_PRD, \ 1579 .dma_boundary = ATA_DMA_BOUNDARY 1580 1581extern void ata_sff_qc_prep(struct ata_queued_cmd *qc); 1582extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc); 1583extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1584extern u8 ata_sff_check_status(struct ata_port *ap); 1585extern void ata_sff_pause(struct ata_port *ap); 1586extern void ata_sff_dma_pause(struct ata_port *ap); 1587extern int ata_sff_busy_sleep(struct ata_port *ap, 1588 unsigned long timeout_pat, unsigned long timeout); 1589extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1590extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1591extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1592extern void ata_sff_exec_command(struct ata_port *ap, 1593 const struct ata_taskfile *tf); 1594extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1595 unsigned char *buf, unsigned int buflen, int rw); 1596extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1597 unsigned char *buf, unsigned int buflen, int rw); 1598extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1599 unsigned char *buf, unsigned int buflen, int rw); 1600extern u8 ata_sff_irq_on(struct ata_port *ap); 1601extern void ata_sff_irq_clear(struct ata_port *ap); 1602extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1603 u8 status, int in_wq); 1604extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1605extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1606extern unsigned int ata_sff_host_intr(struct ata_port *ap, 1607 struct ata_queued_cmd *qc); 1608extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1609extern void ata_sff_lost_interrupt(struct ata_port *ap); 1610extern void ata_sff_freeze(struct ata_port *ap); 1611extern void ata_sff_thaw(struct ata_port *ap); 1612extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1613extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1614 u8 *r_err); 1615extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1616 unsigned long deadline); 1617extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1618 unsigned long deadline); 1619extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1620 unsigned long deadline); 1621extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1622extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1623extern void ata_sff_error_handler(struct ata_port *ap); 1624extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc); 1625extern int ata_sff_port_start(struct ata_port *ap); 1626extern int ata_sff_port_start32(struct ata_port *ap); 1627extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1628extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev, 1629 unsigned long xfer_mask); 1630extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1631extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1632extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1633extern u8 ata_bmdma_status(struct ata_port *ap); 1634extern void ata_bus_reset(struct ata_port *ap); 1635 1636#ifdef CONFIG_PCI 1637extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1638extern int ata_pci_bmdma_init(struct ata_host *host); 1639extern int ata_pci_sff_init_host(struct ata_host *host); 1640extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1641 const struct ata_port_info * const * ppi, 1642 struct ata_host **r_host); 1643extern int ata_pci_sff_activate_host(struct ata_host *host, 1644 irq_handler_t irq_handler, 1645 struct scsi_host_template *sht); 1646extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1647 const struct ata_port_info * const * ppi, 1648 struct scsi_host_template *sht, void *host_priv, int hflags); 1649#endif /* CONFIG_PCI */ 1650 1651/** 1652 * ata_sff_busy_wait - Wait for a port status register 1653 * @ap: Port to wait for. 1654 * @bits: bits that must be clear 1655 * @max: number of 10uS waits to perform 1656 * 1657 * Waits up to max*10 microseconds for the selected bits in the port's 1658 * status register to be cleared. 1659 * Returns final value of status register. 1660 * 1661 * LOCKING: 1662 * Inherited from caller. 1663 */ 1664static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1665 unsigned int max) 1666{ 1667 u8 status; 1668 1669 do { 1670 udelay(10); 1671 status = ap->ops->sff_check_status(ap); 1672 max--; 1673 } while (status != 0xff && (status & bits) && (max > 0)); 1674 1675 return status; 1676} 1677 1678/** 1679 * ata_wait_idle - Wait for a port to be idle. 1680 * @ap: Port to wait for. 1681 * 1682 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1683 * Returns final value of status register. 1684 * 1685 * LOCKING: 1686 * Inherited from caller. 1687 */ 1688static inline u8 ata_wait_idle(struct ata_port *ap) 1689{ 1690 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1691 1692#ifdef ATA_DEBUG 1693 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1694 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1695 status); 1696#endif 1697 1698 return status; 1699} 1700#endif /* CONFIG_ATA_SFF */ 1701 1702#endif /* __LINUX_LIBATA_H__ */ 1703