libata.h revision 005b1f7495e812b99b73de5adbc73afd7a1cbcaf
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/interrupt.h> 31#include <linux/dma-mapping.h> 32#include <linux/scatterlist.h> 33#include <linux/io.h> 34#include <linux/ata.h> 35#include <linux/workqueue.h> 36#include <scsi/scsi_host.h> 37#include <linux/acpi.h> 38#include <linux/cdrom.h> 39 40/* 41 * Define if arch has non-standard setup. This is a _PCI_ standard 42 * not a legacy or ISA standard. 43 */ 44#ifdef CONFIG_ATA_NONSTANDARD 45#include <asm/libata-portmap.h> 46#else 47#include <asm-generic/libata-portmap.h> 48#endif 49 50/* 51 * compile-time options: to be removed as soon as all the drivers are 52 * converted to the new debugging mechanism 53 */ 54#undef ATA_DEBUG /* debugging output */ 55#undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 56#undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 57#undef ATA_NDEBUG /* define to disable quick runtime checks */ 58 59 60/* note: prints function name for you */ 61#ifdef ATA_DEBUG 62#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 63#ifdef ATA_VERBOSE_DEBUG 64#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 65#else 66#define VPRINTK(fmt, args...) 67#endif /* ATA_VERBOSE_DEBUG */ 68#else 69#define DPRINTK(fmt, args...) 70#define VPRINTK(fmt, args...) 71#endif /* ATA_DEBUG */ 72 73#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 74 75/* NEW: debug levels */ 76#define HAVE_LIBATA_MSG 1 77 78enum { 79 ATA_MSG_DRV = 0x0001, 80 ATA_MSG_INFO = 0x0002, 81 ATA_MSG_PROBE = 0x0004, 82 ATA_MSG_WARN = 0x0008, 83 ATA_MSG_MALLOC = 0x0010, 84 ATA_MSG_CTL = 0x0020, 85 ATA_MSG_INTR = 0x0040, 86 ATA_MSG_ERR = 0x0080, 87}; 88 89#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 90#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 91#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 92#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 93#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 94#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 95#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 96#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 97 98static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 99{ 100 if (dval < 0 || dval >= (sizeof(u32) * 8)) 101 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 102 if (!dval) 103 return 0; 104 return (1 << dval) - 1; 105} 106 107/* defines only for the constants which don't work well as enums */ 108#define ATA_TAG_POISON 0xfafbfcfdU 109 110enum { 111 /* various global constants */ 112 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 113 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ 114 ATA_MAX_PORTS = 8, 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_MAX_BUS = 2, 120 ATA_DEF_BUSY_WAIT = 10000, 121 ATA_SHORT_PAUSE = (HZ >> 6) + 1, 122 123 ATAPI_MAX_DRAIN = 16 << 10, 124 125 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1, 126 127 ATA_SHT_EMULATED = 1, 128 ATA_SHT_CMD_PER_LUN = 1, 129 ATA_SHT_THIS_ID = -1, 130 ATA_SHT_USE_CLUSTERING = 1, 131 132 /* struct ata_device stuff */ 133 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 134 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 135 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 136 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 137 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 138 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 139 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 140 ATA_DFLAG_AN = (1 << 7), /* AN configured */ 141 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */ 142 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */ 143 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */ 144 ATA_DFLAG_CFG_MASK = (1 << 12) - 1, 145 146 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */ 147 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */ 148 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */ 149 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */ 150 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */ 151 ATA_DFLAG_INIT_MASK = (1 << 24) - 1, 152 153 ATA_DFLAG_DETACH = (1 << 24), 154 ATA_DFLAG_DETACHED = (1 << 25), 155 156 ATA_DEV_UNKNOWN = 0, /* unknown device */ 157 ATA_DEV_ATA = 1, /* ATA device */ 158 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 159 ATA_DEV_ATAPI = 3, /* ATAPI device */ 160 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 161 ATA_DEV_PMP = 5, /* SATA port multiplier */ 162 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 163 ATA_DEV_SEMB = 7, /* SEMB */ 164 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 165 ATA_DEV_NONE = 9, /* no device */ 166 167 /* struct ata_link flags */ 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 */ 174 175 /* struct ata_port flags */ 176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 177 /* (doesn't imply presence) */ 178 ATA_FLAG_SATA = (1 << 1), 179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 187 * doesn't handle PIO interrupts */ 188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 189 ATA_FLAG_DEBUGMSG = (1 << 13), 190 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 191 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 192 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 193 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 194 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 195 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */ 196 197 /* The following flag belongs to ap->pflags but is kept in 198 * ap->flags because it's referenced in many LLDs and will be 199 * removed in not-too-distant future. 200 */ 201 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 202 203 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 204 205 /* struct ata_port pflags */ 206 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 207 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 208 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 209 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 210 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 211 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 212 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 213 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 214 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 215 216 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 217 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 218 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 219 220 /* struct ata_queued_cmd flags */ 221 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 222 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 223 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 224 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 225 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 226 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 227 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 228 229 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 230 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 231 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 232 233 /* host set flags */ 234 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 235 ATA_HOST_STARTED = (1 << 1), /* Host started */ 236 237 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 238 239 /* various lengths of time */ 240 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 241 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 242 ATA_TMOUT_INTERNAL = 30 * HZ, 243 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 244 245 /* FIXME: GoVault needs 2s but we can't afford that without 246 * parallel probing. 800ms is enough for iVDR disk 247 * HHD424020F7SV00. Increase to 2secs when parallel probing 248 * is in place. 249 */ 250 ATA_TMOUT_FF_WAIT = 4 * HZ / 5, 251 252 /* Spec mandates to wait for ">= 2ms" before checking status 253 * after reset. We wait 150ms, because that was the magic 254 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 255 * the period of time between when the ATA command register is 256 * written, and then status is checked. Because waiting for 257 * "a while" before checking status is fine, post SRST, we 258 * perform this magic delay here as well. 259 * 260 * Old drivers/ide uses the 2mS rule and then waits for ready. 261 */ 262 ATA_WAIT_AFTER_RESET_MSECS = 150, 263 264 /* If PMP is supported, we have to do follow-up SRST. As some 265 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 266 * advised to wait only for the following duration before 267 * doing SRST. 268 */ 269 ATA_TMOUT_PMP_SRST_WAIT = 1 * HZ, 270 271 /* ATA bus states */ 272 BUS_UNKNOWN = 0, 273 BUS_DMA = 1, 274 BUS_IDLE = 2, 275 BUS_NOINTR = 3, 276 BUS_NODATA = 4, 277 BUS_TIMER = 5, 278 BUS_PIO = 6, 279 BUS_EDD = 7, 280 BUS_IDENTIFY = 8, 281 BUS_PACKET = 9, 282 283 /* SATA port states */ 284 PORT_UNKNOWN = 0, 285 PORT_ENABLED = 1, 286 PORT_DISABLED = 2, 287 288 /* encoding various smaller bitmaps into a single 289 * unsigned long bitmap 290 */ 291 ATA_NR_PIO_MODES = 7, 292 ATA_NR_MWDMA_MODES = 5, 293 ATA_NR_UDMA_MODES = 8, 294 295 ATA_SHIFT_PIO = 0, 296 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 297 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 298 299 /* size of buffer to pad xfers ending on unaligned boundaries */ 300 ATA_DMA_PAD_SZ = 4, 301 302 /* ering size */ 303 ATA_ERING_SIZE = 32, 304 305 /* return values for ->qc_defer */ 306 ATA_DEFER_LINK = 1, 307 ATA_DEFER_PORT = 2, 308 309 /* desc_len for ata_eh_info and context */ 310 ATA_EH_DESC_LEN = 80, 311 312 /* reset / recovery action types */ 313 ATA_EH_REVALIDATE = (1 << 0), 314 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 315 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 316 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 317 ATA_EH_ENABLE_LINK = (1 << 3), 318 ATA_EH_LPM = (1 << 4), /* link power management action */ 319 320 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, 321 322 /* ata_eh_info->flags */ 323 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 324 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 325 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 326 327 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 328 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 329 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 330 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 331 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 332 333 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 334 335 /* max tries if error condition is still set after ->error_handler */ 336 ATA_EH_MAX_TRIES = 5, 337 338 /* how hard are we gonna try to probe/recover devices */ 339 ATA_PROBE_MAX_TRIES = 3, 340 ATA_EH_DEV_TRIES = 3, 341 ATA_EH_PMP_TRIES = 5, 342 ATA_EH_PMP_LINK_TRIES = 3, 343 344 SATA_PMP_SCR_TIMEOUT = 250, 345 346 /* Horkage types. May be set by libata or controller on drives 347 (some horkage may be drive/controller pair dependant */ 348 349 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 350 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 351 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 352 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 353 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 354 ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */ 355 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 356 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */ 357 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 358 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 359 360 /* DMA mask for user DMA control: User visible values; DO NOT 361 renumber */ 362 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 363 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 364 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 365 366 /* ATAPI command types */ 367 ATAPI_READ = 0, /* READs */ 368 ATAPI_WRITE = 1, /* WRITEs */ 369 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 370 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 371 ATAPI_MISC = 4, /* the rest */ 372 373 /* Timing constants */ 374 ATA_TIMING_SETUP = (1 << 0), 375 ATA_TIMING_ACT8B = (1 << 1), 376 ATA_TIMING_REC8B = (1 << 2), 377 ATA_TIMING_CYC8B = (1 << 3), 378 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 379 ATA_TIMING_CYC8B, 380 ATA_TIMING_ACTIVE = (1 << 4), 381 ATA_TIMING_RECOVER = (1 << 5), 382 ATA_TIMING_CYCLE = (1 << 6), 383 ATA_TIMING_UDMA = (1 << 7), 384 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 385 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 386 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 387 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 388}; 389 390enum ata_xfer_mask { 391 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 392 << ATA_SHIFT_PIO, 393 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 394 << ATA_SHIFT_MWDMA, 395 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 396 << ATA_SHIFT_UDMA, 397}; 398 399enum hsm_task_states { 400 HSM_ST_IDLE, /* no command on going */ 401 HSM_ST_FIRST, /* (waiting the device to) 402 write CDB or first data block */ 403 HSM_ST, /* (waiting the device to) transfer data */ 404 HSM_ST_LAST, /* (waiting the device to) complete command */ 405 HSM_ST_ERR, /* error */ 406}; 407 408enum ata_completion_errors { 409 AC_ERR_DEV = (1 << 0), /* device reported error */ 410 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 411 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 412 AC_ERR_MEDIA = (1 << 3), /* media error */ 413 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 414 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 415 AC_ERR_SYSTEM = (1 << 6), /* system error */ 416 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 417 AC_ERR_OTHER = (1 << 8), /* unknown */ 418 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 419 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 420}; 421 422/* forward declarations */ 423struct scsi_device; 424struct ata_port_operations; 425struct ata_port; 426struct ata_link; 427struct ata_queued_cmd; 428 429/* typedefs */ 430typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 431typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 432typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 433 unsigned long deadline); 434typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 435 436/* 437 * host pm policy: If you alter this, you also need to alter libata-scsi.c 438 * (for the ascii descriptions) 439 */ 440enum link_pm { 441 NOT_AVAILABLE, 442 MIN_POWER, 443 MAX_PERFORMANCE, 444 MEDIUM_POWER, 445}; 446extern struct device_attribute dev_attr_link_power_management_policy; 447 448#ifdef CONFIG_ATA_SFF 449struct ata_ioports { 450 void __iomem *cmd_addr; 451 void __iomem *data_addr; 452 void __iomem *error_addr; 453 void __iomem *feature_addr; 454 void __iomem *nsect_addr; 455 void __iomem *lbal_addr; 456 void __iomem *lbam_addr; 457 void __iomem *lbah_addr; 458 void __iomem *device_addr; 459 void __iomem *status_addr; 460 void __iomem *command_addr; 461 void __iomem *altstatus_addr; 462 void __iomem *ctl_addr; 463 void __iomem *bmdma_addr; 464 void __iomem *scr_addr; 465}; 466#endif /* CONFIG_ATA_SFF */ 467 468struct ata_host { 469 spinlock_t lock; 470 struct device *dev; 471 void __iomem * const *iomap; 472 unsigned int n_ports; 473 void *private_data; 474 struct ata_port_operations *ops; 475 unsigned long flags; 476#ifdef CONFIG_ATA_ACPI 477 acpi_handle acpi_handle; 478#endif 479 struct ata_port *simplex_claimed; /* channel owning the DMA */ 480 struct ata_port *ports[0]; 481}; 482 483struct ata_queued_cmd { 484 struct ata_port *ap; 485 struct ata_device *dev; 486 487 struct scsi_cmnd *scsicmd; 488 void (*scsidone)(struct scsi_cmnd *); 489 490 struct ata_taskfile tf; 491 u8 cdb[ATAPI_CDB_LEN]; 492 493 unsigned long flags; /* ATA_QCFLAG_xxx */ 494 unsigned int tag; 495 unsigned int n_elem; 496 497 int dma_dir; 498 499 unsigned int sect_size; 500 501 unsigned int nbytes; 502 unsigned int extrabytes; 503 unsigned int curbytes; 504 505 struct scatterlist *cursg; 506 unsigned int cursg_ofs; 507 508 struct scatterlist sgent; 509 510 struct scatterlist *sg; 511 512 unsigned int err_mask; 513 struct ata_taskfile result_tf; 514 ata_qc_cb_t complete_fn; 515 516 void *private_data; 517 void *lldd_task; 518}; 519 520struct ata_port_stats { 521 unsigned long unhandled_irq; 522 unsigned long idle_irq; 523 unsigned long rw_reqbuf; 524}; 525 526struct ata_ering_entry { 527 unsigned int eflags; 528 unsigned int err_mask; 529 u64 timestamp; 530}; 531 532struct ata_ering { 533 int cursor; 534 struct ata_ering_entry ring[ATA_ERING_SIZE]; 535}; 536 537struct ata_device { 538 struct ata_link *link; 539 unsigned int devno; /* 0 or 1 */ 540 unsigned long flags; /* ATA_DFLAG_xxx */ 541 unsigned int horkage; /* List of broken features */ 542 struct scsi_device *sdev; /* attached SCSI device */ 543#ifdef CONFIG_ATA_ACPI 544 acpi_handle acpi_handle; 545 union acpi_object *gtf_cache; 546#endif 547 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 548 u64 n_sectors; /* size of device, if ATA */ 549 unsigned int class; /* ATA_DEV_xxx */ 550 551 u8 pio_mode; 552 u8 dma_mode; 553 u8 xfer_mode; 554 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 555 556 unsigned int multi_count; /* sectors count for 557 READ/WRITE MULTIPLE */ 558 unsigned int max_sectors; /* per-device max sectors */ 559 unsigned int cdb_len; 560 561 /* per-dev xfer mask */ 562 unsigned long pio_mask; 563 unsigned long mwdma_mask; 564 unsigned long udma_mask; 565 566 /* for CHS addressing */ 567 u16 cylinders; /* Number of cylinders */ 568 u16 heads; /* Number of heads */ 569 u16 sectors; /* Number of sectors per track */ 570 571 /* error history */ 572 int spdn_cnt; 573 struct ata_ering ering; 574 575 union { 576 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 577 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 578 }; 579}; 580 581/* Offset into struct ata_device. Fields above it are maintained 582 * acress device init. Fields below are zeroed. 583 */ 584#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 585 586struct ata_eh_info { 587 struct ata_device *dev; /* offending device */ 588 u32 serror; /* SError from LLDD */ 589 unsigned int err_mask; /* port-wide err_mask */ 590 unsigned int action; /* ATA_EH_* action mask */ 591 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 592 unsigned int flags; /* ATA_EHI_* flags */ 593 594 unsigned int probe_mask; 595 596 char desc[ATA_EH_DESC_LEN]; 597 int desc_len; 598}; 599 600struct ata_eh_context { 601 struct ata_eh_info i; 602 int tries[ATA_MAX_DEVICES]; 603 unsigned int classes[ATA_MAX_DEVICES]; 604 unsigned int did_probe_mask; 605 unsigned int saved_ncq_enabled; 606 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 607}; 608 609struct ata_acpi_drive 610{ 611 u32 pio; 612 u32 dma; 613} __packed; 614 615struct ata_acpi_gtm { 616 struct ata_acpi_drive drive[2]; 617 u32 flags; 618} __packed; 619 620struct ata_link { 621 struct ata_port *ap; 622 int pmp; /* port multiplier port # */ 623 624 unsigned int active_tag; /* active tag on this link */ 625 u32 sactive; /* active NCQ commands */ 626 627 unsigned int flags; /* ATA_LFLAG_xxx */ 628 629 unsigned int hw_sata_spd_limit; 630 unsigned int sata_spd_limit; 631 unsigned int sata_spd; /* current SATA PHY speed */ 632 633 /* record runtime error info, protected by host_set lock */ 634 struct ata_eh_info eh_info; 635 /* EH context */ 636 struct ata_eh_context eh_context; 637 638 struct ata_device device[ATA_MAX_DEVICES]; 639}; 640 641struct ata_port { 642 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 643 struct ata_port_operations *ops; 644 spinlock_t *lock; 645 unsigned long flags; /* ATA_FLAG_xxx */ 646 unsigned int pflags; /* ATA_PFLAG_xxx */ 647 unsigned int print_id; /* user visible unique port ID */ 648 unsigned int port_no; /* 0 based port no. inside the host */ 649 650 struct ata_prd *prd; /* our SG list */ 651 dma_addr_t prd_dma; /* and its DMA mapping */ 652 653#ifdef CONFIG_ATA_SFF 654 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 655#endif /* CONFIG_ATA_SFF */ 656 657 u8 ctl; /* cache of ATA control register */ 658 u8 last_ctl; /* Cache last written value */ 659 unsigned int pio_mask; 660 unsigned int mwdma_mask; 661 unsigned int udma_mask; 662 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 663 664 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 665 unsigned long qc_allocated; 666 unsigned int qc_active; 667 int nr_active_links; /* #links with active qcs */ 668 669 struct ata_link link; /* host default link */ 670 671 int nr_pmp_links; /* nr of available PMP links */ 672 struct ata_link *pmp_link; /* array of PMP links */ 673 struct ata_link *excl_link; /* for PMP qc exclusion */ 674 675 struct ata_port_stats stats; 676 struct ata_host *host; 677 struct device *dev; 678 679 void *port_task_data; 680 struct delayed_work port_task; 681 struct delayed_work hotplug_task; 682 struct work_struct scsi_rescan_task; 683 684 unsigned int hsm_task_state; 685 686 u32 msg_enable; 687 struct list_head eh_done_q; 688 wait_queue_head_t eh_wait_q; 689 int eh_tries; 690 691 pm_message_t pm_mesg; 692 int *pm_result; 693 enum link_pm pm_policy; 694 695 struct timer_list fastdrain_timer; 696 unsigned long fastdrain_cnt; 697 698 void *private_data; 699 700#ifdef CONFIG_ATA_ACPI 701 acpi_handle acpi_handle; 702 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 703#endif 704 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 705}; 706 707/* The following initializer overrides a method to NULL whether one of 708 * its parent has the method defined or not. This is equivalent to 709 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 710 * expression and thus can't be used as an initializer. 711 */ 712#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 713 714struct ata_port_operations { 715 /* 716 * Command execution 717 */ 718 int (*qc_defer)(struct ata_queued_cmd *qc); 719 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 720 void (*qc_prep)(struct ata_queued_cmd *qc); 721 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 722 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 723 724 /* 725 * Configuration and exception handling 726 */ 727 int (*cable_detect)(struct ata_port *ap); 728 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 729 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 730 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 731 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 732 733 void (*dev_config)(struct ata_device *dev); 734 735 void (*freeze)(struct ata_port *ap); 736 void (*thaw)(struct ata_port *ap); 737 ata_prereset_fn_t prereset; 738 ata_reset_fn_t softreset; 739 ata_reset_fn_t hardreset; 740 ata_postreset_fn_t postreset; 741 ata_prereset_fn_t pmp_prereset; 742 ata_reset_fn_t pmp_softreset; 743 ata_reset_fn_t pmp_hardreset; 744 ata_postreset_fn_t pmp_postreset; 745 void (*error_handler)(struct ata_port *ap); 746 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 747 748 /* 749 * Optional features 750 */ 751 int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val); 752 int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val); 753 void (*pmp_attach)(struct ata_port *ap); 754 void (*pmp_detach)(struct ata_port *ap); 755 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 756 void (*disable_pm)(struct ata_port *ap); 757 758 /* 759 * Start, stop, suspend and resume 760 */ 761 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 762 int (*port_resume)(struct ata_port *ap); 763 int (*port_start)(struct ata_port *ap); 764 void (*port_stop)(struct ata_port *ap); 765 void (*host_stop)(struct ata_host *host); 766 767#ifdef CONFIG_ATA_SFF 768 /* 769 * SFF / taskfile oriented ops 770 */ 771 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 772 u8 (*sff_check_status)(struct ata_port *ap); 773 u8 (*sff_check_altstatus)(struct ata_port *ap); 774 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 775 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 776 void (*sff_exec_command)(struct ata_port *ap, 777 const struct ata_taskfile *tf); 778 unsigned int (*sff_data_xfer)(struct ata_device *dev, 779 unsigned char *buf, unsigned int buflen, int rw); 780 u8 (*sff_irq_on)(struct ata_port *); 781 void (*sff_irq_clear)(struct ata_port *); 782 783 void (*bmdma_setup)(struct ata_queued_cmd *qc); 784 void (*bmdma_start)(struct ata_queued_cmd *qc); 785 void (*bmdma_stop)(struct ata_queued_cmd *qc); 786 u8 (*bmdma_status)(struct ata_port *ap); 787#endif /* CONFIG_ATA_SFF */ 788 789 /* 790 * Obsolete 791 */ 792 void (*phy_reset)(struct ata_port *ap); 793 void (*eng_timeout)(struct ata_port *ap); 794 795 /* 796 * ->inherits must be the last field and all the preceding 797 * fields must be pointers. 798 */ 799 const struct ata_port_operations *inherits; 800}; 801 802struct ata_port_info { 803 unsigned long flags; 804 unsigned long link_flags; 805 unsigned long pio_mask; 806 unsigned long mwdma_mask; 807 unsigned long udma_mask; 808 struct ata_port_operations *port_ops; 809 void *private_data; 810}; 811 812struct ata_timing { 813 unsigned short mode; /* ATA mode */ 814 unsigned short setup; /* t1 */ 815 unsigned short act8b; /* t2 for 8-bit I/O */ 816 unsigned short rec8b; /* t2i for 8-bit I/O */ 817 unsigned short cyc8b; /* t0 for 8-bit I/O */ 818 unsigned short active; /* t2 or tD */ 819 unsigned short recover; /* t2i or tK */ 820 unsigned short cycle; /* t0 */ 821 unsigned short udma; /* t2CYCTYP/2 */ 822}; 823 824#define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin) 825 826/* 827 * Core layer - drivers/ata/libata-core.c 828 */ 829extern const unsigned long sata_deb_timing_normal[]; 830extern const unsigned long sata_deb_timing_hotplug[]; 831extern const unsigned long sata_deb_timing_long[]; 832 833extern struct ata_port_operations ata_dummy_port_ops; 834extern const struct ata_port_info ata_dummy_port_info; 835 836static inline const unsigned long * 837sata_ehc_deb_timing(struct ata_eh_context *ehc) 838{ 839 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 840 return sata_deb_timing_hotplug; 841 else 842 return sata_deb_timing_normal; 843} 844 845static inline int ata_port_is_dummy(struct ata_port *ap) 846{ 847 return ap->ops == &ata_dummy_port_ops; 848} 849 850extern void ata_port_probe(struct ata_port *); 851extern int sata_set_spd(struct ata_link *link); 852extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 853extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 854 int (*check_ready)(struct ata_link *link)); 855extern int sata_link_debounce(struct ata_link *link, 856 const unsigned long *params, unsigned long deadline); 857extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 858 unsigned long deadline); 859extern int sata_link_hardreset(struct ata_link *link, 860 const unsigned long *timing, unsigned long deadline, 861 bool *online, int (*check_ready)(struct ata_link *)); 862extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 863 unsigned long deadline); 864extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 865extern void ata_port_disable(struct ata_port *); 866 867extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 868extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 869 const struct ata_port_info * const * ppi, int n_ports); 870extern int ata_host_start(struct ata_host *host); 871extern int ata_host_register(struct ata_host *host, 872 struct scsi_host_template *sht); 873extern int ata_host_activate(struct ata_host *host, int irq, 874 irq_handler_t irq_handler, unsigned long irq_flags, 875 struct scsi_host_template *sht); 876extern void ata_host_detach(struct ata_host *host); 877extern void ata_host_init(struct ata_host *, struct device *, 878 unsigned long, struct ata_port_operations *); 879extern int ata_scsi_detect(struct scsi_host_template *sht); 880extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 881extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 882extern void ata_sas_port_destroy(struct ata_port *); 883extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 884 struct ata_port_info *, struct Scsi_Host *); 885extern int ata_sas_port_init(struct ata_port *); 886extern int ata_sas_port_start(struct ata_port *ap); 887extern void ata_sas_port_stop(struct ata_port *ap); 888extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 889extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 890 struct ata_port *ap); 891extern int sata_scr_valid(struct ata_link *link); 892extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 893extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 894extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 895extern int ata_link_online(struct ata_link *link); 896extern int ata_link_offline(struct ata_link *link); 897#ifdef CONFIG_PM 898extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 899extern void ata_host_resume(struct ata_host *host); 900#endif 901extern int ata_ratelimit(void); 902extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 903 unsigned long interval_msec, 904 unsigned long timeout_msec); 905extern int atapi_cmd_type(u8 opcode); 906extern void ata_tf_to_fis(const struct ata_taskfile *tf, 907 u8 pmp, int is_cmd, u8 *fis); 908extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 909extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 910 unsigned long mwdma_mask, unsigned long udma_mask); 911extern void ata_unpack_xfermask(unsigned long xfer_mask, 912 unsigned long *pio_mask, unsigned long *mwdma_mask, 913 unsigned long *udma_mask); 914extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 915extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 916extern int ata_xfer_mode2shift(unsigned long xfer_mode); 917extern const char *ata_mode_string(unsigned long xfer_mask); 918extern unsigned long ata_id_xfermask(const u16 *id); 919extern int ata_port_start(struct ata_port *ap); 920extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 921extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 922extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 923 unsigned int n_elem); 924extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 925extern void ata_dev_disable(struct ata_device *adev); 926extern void ata_id_string(const u16 *id, unsigned char *s, 927 unsigned int ofs, unsigned int len); 928extern void ata_id_c_string(const u16 *id, unsigned char *s, 929 unsigned int ofs, unsigned int len); 930extern void ata_qc_complete(struct ata_queued_cmd *qc); 931extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 932extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 933 void (*done)(struct scsi_cmnd *)); 934extern int ata_std_bios_param(struct scsi_device *sdev, 935 struct block_device *bdev, 936 sector_t capacity, int geom[]); 937extern int ata_scsi_slave_config(struct scsi_device *sdev); 938extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 939extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 940 int queue_depth); 941extern struct ata_device *ata_dev_pair(struct ata_device *adev); 942extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 943 944extern int ata_cable_40wire(struct ata_port *ap); 945extern int ata_cable_80wire(struct ata_port *ap); 946extern int ata_cable_sata(struct ata_port *ap); 947extern int ata_cable_ignore(struct ata_port *ap); 948extern int ata_cable_unknown(struct ata_port *ap); 949 950/* Timing helpers */ 951extern unsigned int ata_pio_need_iordy(const struct ata_device *); 952extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 953extern int ata_timing_compute(struct ata_device *, unsigned short, 954 struct ata_timing *, int, int); 955extern void ata_timing_merge(const struct ata_timing *, 956 const struct ata_timing *, struct ata_timing *, 957 unsigned int); 958extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 959 960/* PCI */ 961#ifdef CONFIG_PCI 962struct pci_dev; 963 964struct pci_bits { 965 unsigned int reg; /* PCI config register to read */ 966 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 967 unsigned long mask; 968 unsigned long val; 969}; 970 971extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 972extern void ata_pci_remove_one(struct pci_dev *pdev); 973 974#ifdef CONFIG_PM 975extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 976extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 977extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 978extern int ata_pci_device_resume(struct pci_dev *pdev); 979#endif /* CONFIG_PM */ 980#endif /* CONFIG_PCI */ 981 982/* 983 * ACPI - drivers/ata/libata-acpi.c 984 */ 985#ifdef CONFIG_ATA_ACPI 986static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 987{ 988 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 989 return &ap->__acpi_init_gtm; 990 return NULL; 991} 992int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 993int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 994unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 995 const struct ata_acpi_gtm *gtm); 996int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 997#else 998static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 999{ 1000 return NULL; 1001} 1002 1003static inline int ata_acpi_stm(const struct ata_port *ap, 1004 struct ata_acpi_gtm *stm) 1005{ 1006 return -ENOSYS; 1007} 1008 1009static inline int ata_acpi_gtm(const struct ata_port *ap, 1010 struct ata_acpi_gtm *stm) 1011{ 1012 return -ENOSYS; 1013} 1014 1015static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1016 const struct ata_acpi_gtm *gtm) 1017{ 1018 return 0; 1019} 1020 1021static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1022 const struct ata_acpi_gtm *gtm) 1023{ 1024 return 0; 1025} 1026#endif 1027 1028/* 1029 * EH - drivers/ata/libata-eh.c 1030 */ 1031extern void ata_port_schedule_eh(struct ata_port *ap); 1032extern int ata_link_abort(struct ata_link *link); 1033extern int ata_port_abort(struct ata_port *ap); 1034extern int ata_port_freeze(struct ata_port *ap); 1035extern int sata_async_notification(struct ata_port *ap); 1036 1037extern void ata_eh_freeze_port(struct ata_port *ap); 1038extern void ata_eh_thaw_port(struct ata_port *ap); 1039 1040extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1041extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1042extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1043 1044extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1045 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1046 ata_postreset_fn_t postreset); 1047extern void ata_std_error_handler(struct ata_port *ap); 1048 1049/* 1050 * Base operations to inherit from and initializers for sht 1051 * 1052 * Operations 1053 * 1054 * base : Common to all libata drivers. 1055 * sata : SATA controllers w/ native interface. 1056 * pmp : SATA controllers w/ PMP support. 1057 * sff : SFF ATA controllers w/o BMDMA support. 1058 * bmdma : SFF ATA controllers w/ BMDMA support. 1059 * 1060 * sht initializers 1061 * 1062 * BASE : Common to all libata drivers. The user must set 1063 * sg_tablesize and dma_boundary. 1064 * PIO : SFF ATA controllers w/ only PIO support. 1065 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1066 * dma_boundary are set to BMDMA limits. 1067 * NCQ : SATA controllers supporting NCQ. The user must set 1068 * sg_tablesize, dma_boundary and can_queue. 1069 */ 1070extern const struct ata_port_operations ata_base_port_ops; 1071extern const struct ata_port_operations sata_port_ops; 1072 1073#define ATA_BASE_SHT(drv_name) \ 1074 .module = THIS_MODULE, \ 1075 .name = drv_name, \ 1076 .ioctl = ata_scsi_ioctl, \ 1077 .queuecommand = ata_scsi_queuecmd, \ 1078 .can_queue = ATA_DEF_QUEUE, \ 1079 .this_id = ATA_SHT_THIS_ID, \ 1080 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1081 .emulated = ATA_SHT_EMULATED, \ 1082 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1083 .proc_name = drv_name, \ 1084 .slave_configure = ata_scsi_slave_config, \ 1085 .slave_destroy = ata_scsi_slave_destroy, \ 1086 .bios_param = ata_std_bios_param 1087 1088#define ATA_NCQ_SHT(drv_name) \ 1089 ATA_BASE_SHT(drv_name), \ 1090 .change_queue_depth = ata_scsi_change_queue_depth 1091 1092/* 1093 * PMP helpers 1094 */ 1095#ifdef CONFIG_SATA_PMP 1096static inline bool sata_pmp_supported(struct ata_port *ap) 1097{ 1098 return ap->flags & ATA_FLAG_PMP; 1099} 1100 1101static inline bool sata_pmp_attached(struct ata_port *ap) 1102{ 1103 return ap->nr_pmp_links != 0; 1104} 1105 1106static inline int ata_is_host_link(const struct ata_link *link) 1107{ 1108 return link == &link->ap->link; 1109} 1110#else /* CONFIG_SATA_PMP */ 1111static inline bool sata_pmp_supported(struct ata_port *ap) 1112{ 1113 return false; 1114} 1115 1116static inline bool sata_pmp_attached(struct ata_port *ap) 1117{ 1118 return false; 1119} 1120 1121static inline int ata_is_host_link(const struct ata_link *link) 1122{ 1123 return 1; 1124} 1125#endif /* CONFIG_SATA_PMP */ 1126 1127static inline int sata_srst_pmp(struct ata_link *link) 1128{ 1129 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1130 return SATA_PMP_CTRL_PORT; 1131 return link->pmp; 1132} 1133 1134/* 1135 * printk helpers 1136 */ 1137#define ata_port_printk(ap, lv, fmt, args...) \ 1138 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1139 1140#define ata_link_printk(link, lv, fmt, args...) do { \ 1141 if (sata_pmp_attached((link)->ap)) \ 1142 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1143 (link)->pmp , ##args); \ 1144 else \ 1145 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1146 } while(0) 1147 1148#define ata_dev_printk(dev, lv, fmt, args...) \ 1149 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1150 (dev)->link->pmp + (dev)->devno , ##args) 1151 1152/* 1153 * ata_eh_info helpers 1154 */ 1155extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1156 __attribute__ ((format (printf, 2, 3))); 1157extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1158 __attribute__ ((format (printf, 2, 3))); 1159extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1160 1161static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1162{ 1163 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1164 ehi->flags |= ATA_EHI_HOTPLUGGED; 1165 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1166 ehi->err_mask |= AC_ERR_ATA_BUS; 1167} 1168 1169/* 1170 * port description helpers 1171 */ 1172extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1173 __attribute__ ((format (printf, 2, 3))); 1174#ifdef CONFIG_PCI 1175extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1176 const char *name); 1177#endif 1178 1179static inline unsigned int ata_tag_valid(unsigned int tag) 1180{ 1181 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1182} 1183 1184static inline unsigned int ata_tag_internal(unsigned int tag) 1185{ 1186 return tag == ATA_TAG_INTERNAL; 1187} 1188 1189/* 1190 * device helpers 1191 */ 1192static inline unsigned int ata_class_enabled(unsigned int class) 1193{ 1194 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1195 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1196} 1197 1198static inline unsigned int ata_class_disabled(unsigned int class) 1199{ 1200 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1201 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1202} 1203 1204static inline unsigned int ata_class_absent(unsigned int class) 1205{ 1206 return !ata_class_enabled(class) && !ata_class_disabled(class); 1207} 1208 1209static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1210{ 1211 return ata_class_enabled(dev->class); 1212} 1213 1214static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1215{ 1216 return ata_class_disabled(dev->class); 1217} 1218 1219static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1220{ 1221 return ata_class_absent(dev->class); 1222} 1223 1224/* 1225 * link helpers 1226 */ 1227static inline int ata_link_max_devices(const struct ata_link *link) 1228{ 1229 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1230 return 2; 1231 return 1; 1232} 1233 1234static inline int ata_link_active(struct ata_link *link) 1235{ 1236 return ata_tag_valid(link->active_tag) || link->sactive; 1237} 1238 1239static inline struct ata_link *ata_port_first_link(struct ata_port *ap) 1240{ 1241 if (sata_pmp_attached(ap)) 1242 return ap->pmp_link; 1243 return &ap->link; 1244} 1245 1246static inline struct ata_link *ata_port_next_link(struct ata_link *link) 1247{ 1248 struct ata_port *ap = link->ap; 1249 1250 if (ata_is_host_link(link)) { 1251 if (!sata_pmp_attached(ap)) 1252 return NULL; 1253 return ap->pmp_link; 1254 } 1255 1256 if (++link < ap->nr_pmp_links + ap->pmp_link) 1257 return link; 1258 return NULL; 1259} 1260 1261#define __ata_port_for_each_link(lk, ap) \ 1262 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk)) 1263 1264#define ata_port_for_each_link(link, ap) \ 1265 for ((link) = ata_port_first_link(ap); (link); \ 1266 (link) = ata_port_next_link(link)) 1267 1268#define ata_link_for_each_dev(dev, link) \ 1269 for ((dev) = (link)->device; \ 1270 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \ 1271 (dev)++) 1272 1273#define ata_link_for_each_dev_reverse(dev, link) \ 1274 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \ 1275 (dev) >= (link)->device || ((dev) = NULL); (dev)--) 1276 1277/** 1278 * ata_ncq_enabled - Test whether NCQ is enabled 1279 * @dev: ATA device to test for 1280 * 1281 * LOCKING: 1282 * spin_lock_irqsave(host lock) 1283 * 1284 * RETURNS: 1285 * 1 if NCQ is enabled for @dev, 0 otherwise. 1286 */ 1287static inline int ata_ncq_enabled(struct ata_device *dev) 1288{ 1289 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1290 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1291} 1292 1293static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1294{ 1295 qc->tf.ctl |= ATA_NIEN; 1296} 1297 1298static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1299 unsigned int tag) 1300{ 1301 if (likely(ata_tag_valid(tag))) 1302 return &ap->qcmd[tag]; 1303 return NULL; 1304} 1305 1306static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1307 unsigned int tag) 1308{ 1309 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1310 1311 if (unlikely(!qc) || !ap->ops->error_handler) 1312 return qc; 1313 1314 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1315 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1316 return qc; 1317 1318 return NULL; 1319} 1320 1321static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1322{ 1323 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1324} 1325 1326static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1327{ 1328 memset(tf, 0, sizeof(*tf)); 1329 1330 tf->ctl = dev->link->ap->ctl; 1331 if (dev->devno == 0) 1332 tf->device = ATA_DEVICE_OBS; 1333 else 1334 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1335} 1336 1337static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1338{ 1339 qc->dma_dir = DMA_NONE; 1340 qc->sg = NULL; 1341 qc->flags = 0; 1342 qc->cursg = NULL; 1343 qc->cursg_ofs = 0; 1344 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1345 qc->n_elem = 0; 1346 qc->err_mask = 0; 1347 qc->sect_size = ATA_SECT_SIZE; 1348 1349 ata_tf_init(qc->dev, &qc->tf); 1350 1351 /* init result_tf such that it indicates normal completion */ 1352 qc->result_tf.command = ATA_DRDY; 1353 qc->result_tf.feature = 0; 1354} 1355 1356static inline int ata_try_flush_cache(const struct ata_device *dev) 1357{ 1358 return ata_id_wcache_enabled(dev->id) || 1359 ata_id_has_flush(dev->id) || 1360 ata_id_has_flush_ext(dev->id); 1361} 1362 1363static inline unsigned int ac_err_mask(u8 status) 1364{ 1365 if (status & (ATA_BUSY | ATA_DRQ)) 1366 return AC_ERR_HSM; 1367 if (status & (ATA_ERR | ATA_DF)) 1368 return AC_ERR_DEV; 1369 return 0; 1370} 1371 1372static inline unsigned int __ac_err_mask(u8 status) 1373{ 1374 unsigned int mask = ac_err_mask(status); 1375 if (mask == 0) 1376 return AC_ERR_OTHER; 1377 return mask; 1378} 1379 1380static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1381{ 1382 return *(struct ata_port **)&host->hostdata[0]; 1383} 1384 1385static inline int ata_check_ready(u8 status) 1386{ 1387 if (!(status & ATA_BUSY)) 1388 return 1; 1389 1390 /* 0xff indicates either no device or device not ready */ 1391 if (status == 0xff) 1392 return -ENODEV; 1393 1394 return 0; 1395} 1396 1397 1398/************************************************************************** 1399 * PMP - drivers/ata/libata-pmp.c 1400 */ 1401#ifdef CONFIG_SATA_PMP 1402 1403extern const struct ata_port_operations sata_pmp_port_ops; 1404 1405extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1406extern void sata_pmp_error_handler(struct ata_port *ap); 1407 1408#else /* CONFIG_SATA_PMP */ 1409 1410#define sata_pmp_port_ops sata_port_ops 1411#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1412#define sata_pmp_error_handler ata_std_error_handler 1413 1414#endif /* CONFIG_SATA_PMP */ 1415 1416 1417/************************************************************************** 1418 * SFF - drivers/ata/libata-sff.c 1419 */ 1420#ifdef CONFIG_ATA_SFF 1421 1422extern const struct ata_port_operations ata_sff_port_ops; 1423extern const struct ata_port_operations ata_bmdma_port_ops; 1424 1425/* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1426#define ATA_PIO_SHT(drv_name) \ 1427 ATA_BASE_SHT(drv_name), \ 1428 .sg_tablesize = LIBATA_MAX_PRD, \ 1429 .dma_boundary = ATA_DMA_BOUNDARY 1430 1431#define ATA_BMDMA_SHT(drv_name) \ 1432 ATA_BASE_SHT(drv_name), \ 1433 .sg_tablesize = LIBATA_MAX_PRD, \ 1434 .dma_boundary = ATA_DMA_BOUNDARY 1435 1436extern void ata_sff_qc_prep(struct ata_queued_cmd *qc); 1437extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc); 1438extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1439extern u8 ata_sff_check_status(struct ata_port *ap); 1440extern u8 ata_sff_altstatus(struct ata_port *ap); 1441extern int ata_sff_busy_sleep(struct ata_port *ap, 1442 unsigned long timeout_pat, unsigned long timeout); 1443extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1444extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1445extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1446extern void ata_sff_exec_command(struct ata_port *ap, 1447 const struct ata_taskfile *tf); 1448extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1449 unsigned char *buf, unsigned int buflen, int rw); 1450extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1451 unsigned char *buf, unsigned int buflen, int rw); 1452extern u8 ata_sff_irq_on(struct ata_port *ap); 1453extern void ata_sff_irq_clear(struct ata_port *ap); 1454extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1455 u8 status, int in_wq); 1456extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1457extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1458extern unsigned int ata_sff_host_intr(struct ata_port *ap, 1459 struct ata_queued_cmd *qc); 1460extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1461extern void ata_sff_freeze(struct ata_port *ap); 1462extern void ata_sff_thaw(struct ata_port *ap); 1463extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1464extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1465 u8 *r_err); 1466extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1467 unsigned long deadline); 1468extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1469 unsigned long deadline); 1470extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1471 unsigned long deadline); 1472extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1473extern void ata_sff_error_handler(struct ata_port *ap); 1474extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc); 1475extern int ata_sff_port_start(struct ata_port *ap); 1476extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1477extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev, 1478 unsigned long xfer_mask); 1479extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1480extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1481extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1482extern u8 ata_bmdma_status(struct ata_port *ap); 1483extern void ata_bus_reset(struct ata_port *ap); 1484 1485#ifdef CONFIG_PCI 1486extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1487extern int ata_pci_bmdma_init(struct ata_host *host); 1488extern int ata_pci_sff_init_host(struct ata_host *host); 1489extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1490 const struct ata_port_info * const * ppi, 1491 struct ata_host **r_host); 1492extern int ata_pci_sff_activate_host(struct ata_host *host, 1493 irq_handler_t irq_handler, 1494 struct scsi_host_template *sht); 1495extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1496 const struct ata_port_info * const * ppi, 1497 struct scsi_host_template *sht, void *host_priv); 1498#endif /* CONFIG_PCI */ 1499 1500/** 1501 * ata_sff_pause - Flush writes and pause 400 nanoseconds. 1502 * @ap: Port to wait for. 1503 * 1504 * LOCKING: 1505 * Inherited from caller. 1506 */ 1507static inline void ata_sff_pause(struct ata_port *ap) 1508{ 1509 ata_sff_altstatus(ap); 1510 ndelay(400); 1511} 1512 1513/** 1514 * ata_sff_busy_wait - Wait for a port status register 1515 * @ap: Port to wait for. 1516 * @bits: bits that must be clear 1517 * @max: number of 10uS waits to perform 1518 * 1519 * Waits up to max*10 microseconds for the selected bits in the port's 1520 * status register to be cleared. 1521 * Returns final value of status register. 1522 * 1523 * LOCKING: 1524 * Inherited from caller. 1525 */ 1526static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1527 unsigned int max) 1528{ 1529 u8 status; 1530 1531 do { 1532 udelay(10); 1533 status = ap->ops->sff_check_status(ap); 1534 max--; 1535 } while (status != 0xff && (status & bits) && (max > 0)); 1536 1537 return status; 1538} 1539 1540/** 1541 * ata_wait_idle - Wait for a port to be idle. 1542 * @ap: Port to wait for. 1543 * 1544 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1545 * Returns final value of status register. 1546 * 1547 * LOCKING: 1548 * Inherited from caller. 1549 */ 1550static inline u8 ata_wait_idle(struct ata_port *ap) 1551{ 1552 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1553 1554#ifdef ATA_DEBUG 1555 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1556 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1557 status); 1558#endif 1559 1560 return status; 1561} 1562#endif /* CONFIG_ATA_SFF */ 1563 1564#endif /* __LINUX_LIBATA_H__ */ 1565