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 79 enum { 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 99 static 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 110 111 enum { 112 /* various global constants */ 113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ 115 ATA_DEF_QUEUE = 1, 116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 117 ATA_MAX_QUEUE = 32, 118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 119 ATA_SHORT_PAUSE = 16, 120 121 ATAPI_MAX_DRAIN = 16 << 10, 122 123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1, 124 125 ATA_SHT_EMULATED = 1, 126 ATA_SHT_CMD_PER_LUN = 1, 127 ATA_SHT_THIS_ID = -1, 128 ATA_SHT_USE_CLUSTERING = 1, 129 130 /* struct ata_device stuff */ 131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 138 ATA_DFLAG_AN = (1 << 7), /* AN configured */ 139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */ 140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */ 141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */ 142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1, 143 144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */ 145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */ 146 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */ 147 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */ 148 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */ 149 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */ 150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1, 151 152 ATA_DFLAG_DETACH = (1 << 24), 153 ATA_DFLAG_DETACHED = (1 << 25), 154 155 ATA_DEV_UNKNOWN = 0, /* unknown device */ 156 ATA_DEV_ATA = 1, /* ATA device */ 157 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 158 ATA_DEV_ATAPI = 3, /* ATAPI device */ 159 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 160 ATA_DEV_PMP = 5, /* SATA port multiplier */ 161 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 162 ATA_DEV_SEMB = 7, /* SEMB */ 163 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 164 ATA_DEV_NONE = 9, /* no device */ 165 166 /* struct ata_link flags */ 167 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ 168 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ 169 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ 170 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ 171 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 174 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */ 175 176 /* struct ata_port flags */ 177 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 178 /* (doesn't imply presence) */ 179 ATA_FLAG_SATA = (1 << 1), 180 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 181 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 182 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 183 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 184 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 185 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 186 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 187 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 188 * doesn't handle PIO interrupts */ 189 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 190 ATA_FLAG_DEBUGMSG = (1 << 13), 191 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 192 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 193 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 194 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 195 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 196 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */ 197 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 198 * management */ 199 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 200 * led */ 201 202 /* The following flag belongs to ap->pflags but is kept in 203 * ap->flags because it's referenced in many LLDs and will be 204 * removed in not-too-distant future. 205 */ 206 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 207 208 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 209 210 /* struct ata_port pflags */ 211 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 212 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 213 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 214 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 215 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 216 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 217 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 218 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 219 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 220 221 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 222 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 223 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 224 225 /* struct ata_queued_cmd flags */ 226 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 227 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 228 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 229 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 230 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 231 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 232 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 233 234 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 235 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 236 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 237 238 /* host set flags */ 239 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 240 ATA_HOST_STARTED = (1 << 1), /* Host started */ 241 242 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 243 244 /* various lengths of time */ 245 ATA_TMOUT_BOOT = 30000, /* heuristic */ 246 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 247 ATA_TMOUT_INTERNAL_QUICK = 5000, 248 ATA_TMOUT_MAX_PARK = 30000, 249 250 /* FIXME: GoVault needs 2s but we can't afford that without 251 * parallel probing. 800ms is enough for iVDR disk 252 * HHD424020F7SV00. Increase to 2secs when parallel probing 253 * is in place. 254 */ 255 ATA_TMOUT_FF_WAIT = 800, 256 257 /* Spec mandates to wait for ">= 2ms" before checking status 258 * after reset. We wait 150ms, because that was the magic 259 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 260 * the period of time between when the ATA command register is 261 * written, and then status is checked. Because waiting for 262 * "a while" before checking status is fine, post SRST, we 263 * perform this magic delay here as well. 264 * 265 * Old drivers/ide uses the 2mS rule and then waits for ready. 266 */ 267 ATA_WAIT_AFTER_RESET = 150, 268 269 /* If PMP is supported, we have to do follow-up SRST. As some 270 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 271 * advised to wait only for the following duration before 272 * doing SRST. 273 */ 274 ATA_TMOUT_PMP_SRST_WAIT = 1000, 275 276 /* ATA bus states */ 277 BUS_UNKNOWN = 0, 278 BUS_DMA = 1, 279 BUS_IDLE = 2, 280 BUS_NOINTR = 3, 281 BUS_NODATA = 4, 282 BUS_TIMER = 5, 283 BUS_PIO = 6, 284 BUS_EDD = 7, 285 BUS_IDENTIFY = 8, 286 BUS_PACKET = 9, 287 288 /* SATA port states */ 289 PORT_UNKNOWN = 0, 290 PORT_ENABLED = 1, 291 PORT_DISABLED = 2, 292 293 /* encoding various smaller bitmaps into a single 294 * unsigned long bitmap 295 */ 296 ATA_NR_PIO_MODES = 7, 297 ATA_NR_MWDMA_MODES = 5, 298 ATA_NR_UDMA_MODES = 8, 299 300 ATA_SHIFT_PIO = 0, 301 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 302 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 303 304 /* size of buffer to pad xfers ending on unaligned boundaries */ 305 ATA_DMA_PAD_SZ = 4, 306 307 /* ering size */ 308 ATA_ERING_SIZE = 32, 309 310 /* return values for ->qc_defer */ 311 ATA_DEFER_LINK = 1, 312 ATA_DEFER_PORT = 2, 313 314 /* desc_len for ata_eh_info and context */ 315 ATA_EH_DESC_LEN = 80, 316 317 /* reset / recovery action types */ 318 ATA_EH_REVALIDATE = (1 << 0), 319 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 320 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 321 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 322 ATA_EH_ENABLE_LINK = (1 << 3), 323 ATA_EH_LPM = (1 << 4), /* link power management action */ 324 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 325 326 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 327 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 328 ATA_EH_ENABLE_LINK | ATA_EH_LPM, 329 330 /* ata_eh_info->flags */ 331 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 332 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 333 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 334 335 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 336 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 337 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 338 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 339 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 340 341 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 342 343 /* mask of flags to transfer *to* the slave link */ 344 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 345 346 /* max tries if error condition is still set after ->error_handler */ 347 ATA_EH_MAX_TRIES = 5, 348 349 /* how hard are we gonna try to probe/recover devices */ 350 ATA_PROBE_MAX_TRIES = 3, 351 ATA_EH_DEV_TRIES = 3, 352 ATA_EH_PMP_TRIES = 5, 353 ATA_EH_PMP_LINK_TRIES = 3, 354 355 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 356 357 /* This should match the actual table size of 358 * ata_eh_cmd_timeout_table in libata-eh.c. 359 */ 360 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5, 361 362 /* Horkage types. May be set by libata or controller on drives 363 (some horkage may be drive/controller pair dependant */ 364 365 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 366 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 367 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 368 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 369 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 370 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 371 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 372 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */ 373 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 374 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 375 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 376 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 377 not multiple of 16 bytes */ 378 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firwmare update warning */ 379 380 /* DMA mask for user DMA control: User visible values; DO NOT 381 renumber */ 382 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 383 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 384 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 385 386 /* ATAPI command types */ 387 ATAPI_READ = 0, /* READs */ 388 ATAPI_WRITE = 1, /* WRITEs */ 389 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 390 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 391 ATAPI_MISC = 4, /* the rest */ 392 393 /* Timing constants */ 394 ATA_TIMING_SETUP = (1 << 0), 395 ATA_TIMING_ACT8B = (1 << 1), 396 ATA_TIMING_REC8B = (1 << 2), 397 ATA_TIMING_CYC8B = (1 << 3), 398 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 399 ATA_TIMING_CYC8B, 400 ATA_TIMING_ACTIVE = (1 << 4), 401 ATA_TIMING_RECOVER = (1 << 5), 402 ATA_TIMING_CYCLE = (1 << 6), 403 ATA_TIMING_UDMA = (1 << 7), 404 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 405 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 406 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 407 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 408 }; 409 410 enum ata_xfer_mask { 411 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 412 << ATA_SHIFT_PIO, 413 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 414 << ATA_SHIFT_MWDMA, 415 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 416 << ATA_SHIFT_UDMA, 417 }; 418 419 enum hsm_task_states { 420 HSM_ST_IDLE, /* no command on going */ 421 HSM_ST_FIRST, /* (waiting the device to) 422 write CDB or first data block */ 423 HSM_ST, /* (waiting the device to) transfer data */ 424 HSM_ST_LAST, /* (waiting the device to) complete command */ 425 HSM_ST_ERR, /* error */ 426 }; 427 428 enum ata_completion_errors { 429 AC_ERR_DEV = (1 << 0), /* device reported error */ 430 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 431 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 432 AC_ERR_MEDIA = (1 << 3), /* media error */ 433 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 434 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 435 AC_ERR_SYSTEM = (1 << 6), /* system error */ 436 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 437 AC_ERR_OTHER = (1 << 8), /* unknown */ 438 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 439 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 440 }; 441 442 /* forward declarations */ 443 struct scsi_device; 444 struct ata_port_operations; 445 struct ata_port; 446 struct ata_link; 447 struct ata_queued_cmd; 448 449 /* typedefs */ 450 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 451 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 452 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 453 unsigned long deadline); 454 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 455 456 /* 457 * host pm policy: If you alter this, you also need to alter libata-scsi.c 458 * (for the ascii descriptions) 459 */ 460 enum link_pm { 461 NOT_AVAILABLE, 462 MIN_POWER, 463 MAX_PERFORMANCE, 464 MEDIUM_POWER, 465 }; 466 extern struct device_attribute dev_attr_link_power_management_policy; 467 extern struct device_attribute dev_attr_unload_heads; 468 extern struct device_attribute dev_attr_em_message_type; 469 extern struct device_attribute dev_attr_em_message; 470 extern struct device_attribute dev_attr_sw_activity; 471 472 enum sw_activity { 473 OFF, 474 BLINK_ON, 475 BLINK_OFF, 476 }; 477 478 #ifdef CONFIG_ATA_SFF 479 struct ata_ioports { 480 void __iomem *cmd_addr; 481 void __iomem *data_addr; 482 void __iomem *error_addr; 483 void __iomem *feature_addr; 484 void __iomem *nsect_addr; 485 void __iomem *lbal_addr; 486 void __iomem *lbam_addr; 487 void __iomem *lbah_addr; 488 void __iomem *device_addr; 489 void __iomem *status_addr; 490 void __iomem *command_addr; 491 void __iomem *altstatus_addr; 492 void __iomem *ctl_addr; 493 void __iomem *bmdma_addr; 494 void __iomem *scr_addr; 495 }; 496 #endif /* CONFIG_ATA_SFF */ 497 498 struct ata_host { 499 spinlock_t lock; 500 struct device *dev; 501 void __iomem * const *iomap; 502 unsigned int n_ports; 503 void *private_data; 504 struct ata_port_operations *ops; 505 unsigned long flags; 506 #ifdef CONFIG_ATA_ACPI 507 acpi_handle acpi_handle; 508 #endif 509 struct ata_port *simplex_claimed; /* channel owning the DMA */ 510 struct ata_port *ports[0]; 511 }; 512 513 struct ata_queued_cmd { 514 struct ata_port *ap; 515 struct ata_device *dev; 516 517 struct scsi_cmnd *scsicmd; 518 void (*scsidone)(struct scsi_cmnd *); 519 520 struct ata_taskfile tf; 521 u8 cdb[ATAPI_CDB_LEN]; 522 523 unsigned long flags; /* ATA_QCFLAG_xxx */ 524 unsigned int tag; 525 unsigned int n_elem; 526 527 int dma_dir; 528 529 unsigned int sect_size; 530 531 unsigned int nbytes; 532 unsigned int extrabytes; 533 unsigned int curbytes; 534 535 struct scatterlist *cursg; 536 unsigned int cursg_ofs; 537 538 struct scatterlist sgent; 539 540 struct scatterlist *sg; 541 542 unsigned int err_mask; 543 struct ata_taskfile result_tf; 544 ata_qc_cb_t complete_fn; 545 546 void *private_data; 547 void *lldd_task; 548 }; 549 550 struct ata_port_stats { 551 unsigned long unhandled_irq; 552 unsigned long idle_irq; 553 unsigned long rw_reqbuf; 554 }; 555 556 struct ata_ering_entry { 557 unsigned int eflags; 558 unsigned int err_mask; 559 u64 timestamp; 560 }; 561 562 struct ata_ering { 563 int cursor; 564 struct ata_ering_entry ring[ATA_ERING_SIZE]; 565 }; 566 567 struct ata_device { 568 struct ata_link *link; 569 unsigned int devno; /* 0 or 1 */ 570 unsigned int horkage; /* List of broken features */ 571 unsigned long flags; /* ATA_DFLAG_xxx */ 572 struct scsi_device *sdev; /* attached SCSI device */ 573 #ifdef CONFIG_ATA_ACPI 574 acpi_handle acpi_handle; 575 union acpi_object *gtf_cache; 576 #endif 577 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 578 u64 n_sectors; /* size of device, if ATA */ 579 unsigned int class; /* ATA_DEV_xxx */ 580 unsigned long unpark_deadline; 581 582 u8 pio_mode; 583 u8 dma_mode; 584 u8 xfer_mode; 585 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 586 587 unsigned int multi_count; /* sectors count for 588 READ/WRITE MULTIPLE */ 589 unsigned int max_sectors; /* per-device max sectors */ 590 unsigned int cdb_len; 591 592 /* per-dev xfer mask */ 593 unsigned long pio_mask; 594 unsigned long mwdma_mask; 595 unsigned long udma_mask; 596 597 /* for CHS addressing */ 598 u16 cylinders; /* Number of cylinders */ 599 u16 heads; /* Number of heads */ 600 u16 sectors; /* Number of sectors per track */ 601 602 /* error history */ 603 int spdn_cnt; 604 struct ata_ering ering; 605 606 union { 607 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 608 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 609 }; 610 }; 611 612 /* Offset into struct ata_device. Fields above it are maintained 613 * acress device init. Fields below are zeroed. 614 */ 615 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 616 617 struct ata_eh_info { 618 struct ata_device *dev; /* offending device */ 619 u32 serror; /* SError from LLDD */ 620 unsigned int err_mask; /* port-wide err_mask */ 621 unsigned int action; /* ATA_EH_* action mask */ 622 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 623 unsigned int flags; /* ATA_EHI_* flags */ 624 625 unsigned int probe_mask; 626 627 char desc[ATA_EH_DESC_LEN]; 628 int desc_len; 629 }; 630 631 struct ata_eh_context { 632 struct ata_eh_info i; 633 int tries[ATA_MAX_DEVICES]; 634 int cmd_timeout_idx[ATA_MAX_DEVICES] 635 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 636 unsigned int classes[ATA_MAX_DEVICES]; 637 unsigned int did_probe_mask; 638 unsigned int unloaded_mask; 639 unsigned int saved_ncq_enabled; 640 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 641 /* timestamp for the last reset attempt or success */ 642 unsigned long last_reset; 643 }; 644 645 struct ata_acpi_drive 646 { 647 u32 pio; 648 u32 dma; 649 } __packed; 650 651 struct ata_acpi_gtm { 652 struct ata_acpi_drive drive[2]; 653 u32 flags; 654 } __packed; 655 656 struct ata_link { 657 struct ata_port *ap; 658 int pmp; /* port multiplier port # */ 659 660 unsigned int active_tag; /* active tag on this link */ 661 u32 sactive; /* active NCQ commands */ 662 663 unsigned int flags; /* ATA_LFLAG_xxx */ 664 665 u32 saved_scontrol; /* SControl on probe */ 666 unsigned int hw_sata_spd_limit; 667 unsigned int sata_spd_limit; 668 unsigned int sata_spd; /* current SATA PHY speed */ 669 670 /* record runtime error info, protected by host_set lock */ 671 struct ata_eh_info eh_info; 672 /* EH context */ 673 struct ata_eh_context eh_context; 674 675 struct ata_device device[ATA_MAX_DEVICES]; 676 }; 677 678 struct ata_port { 679 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 680 struct ata_port_operations *ops; 681 spinlock_t *lock; 682 unsigned long flags; /* ATA_FLAG_xxx */ 683 unsigned int pflags; /* ATA_PFLAG_xxx */ 684 unsigned int print_id; /* user visible unique port ID */ 685 unsigned int port_no; /* 0 based port no. inside the host */ 686 687 struct ata_prd *prd; /* our SG list */ 688 dma_addr_t prd_dma; /* and its DMA mapping */ 689 690 #ifdef CONFIG_ATA_SFF 691 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 692 #endif /* CONFIG_ATA_SFF */ 693 694 u8 ctl; /* cache of ATA control register */ 695 u8 last_ctl; /* Cache last written value */ 696 unsigned int pio_mask; 697 unsigned int mwdma_mask; 698 unsigned int udma_mask; 699 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 700 701 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 702 unsigned long qc_allocated; 703 unsigned int qc_active; 704 int nr_active_links; /* #links with active qcs */ 705 706 struct ata_link link; /* host default link */ 707 struct ata_link *slave_link; /* see ata_slave_link_init() */ 708 709 int nr_pmp_links; /* nr of available PMP links */ 710 struct ata_link *pmp_link; /* array of PMP links */ 711 struct ata_link *excl_link; /* for PMP qc exclusion */ 712 713 struct ata_port_stats stats; 714 struct ata_host *host; 715 struct device *dev; 716 717 void *port_task_data; 718 struct delayed_work port_task; 719 struct delayed_work hotplug_task; 720 struct work_struct scsi_rescan_task; 721 722 unsigned int hsm_task_state; 723 724 u32 msg_enable; 725 struct list_head eh_done_q; 726 wait_queue_head_t eh_wait_q; 727 int eh_tries; 728 struct completion park_req_pending; 729 730 pm_message_t pm_mesg; 731 int *pm_result; 732 enum link_pm pm_policy; 733 734 struct timer_list fastdrain_timer; 735 unsigned long fastdrain_cnt; 736 737 int em_message_type; 738 void *private_data; 739 740 #ifdef CONFIG_ATA_ACPI 741 acpi_handle acpi_handle; 742 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 743 #endif 744 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 745 }; 746 747 /* The following initializer overrides a method to NULL whether one of 748 * its parent has the method defined or not. This is equivalent to 749 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 750 * expression and thus can't be used as an initializer. 751 */ 752 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 753 754 struct ata_port_operations { 755 /* 756 * Command execution 757 */ 758 int (*qc_defer)(struct ata_queued_cmd *qc); 759 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 760 void (*qc_prep)(struct ata_queued_cmd *qc); 761 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 762 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 763 764 /* 765 * Configuration and exception handling 766 */ 767 int (*cable_detect)(struct ata_port *ap); 768 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 769 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 770 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 771 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 772 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 773 774 void (*dev_config)(struct ata_device *dev); 775 776 void (*freeze)(struct ata_port *ap); 777 void (*thaw)(struct ata_port *ap); 778 ata_prereset_fn_t prereset; 779 ata_reset_fn_t softreset; 780 ata_reset_fn_t hardreset; 781 ata_postreset_fn_t postreset; 782 ata_prereset_fn_t pmp_prereset; 783 ata_reset_fn_t pmp_softreset; 784 ata_reset_fn_t pmp_hardreset; 785 ata_postreset_fn_t pmp_postreset; 786 void (*error_handler)(struct ata_port *ap); 787 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 788 789 /* 790 * Optional features 791 */ 792 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 793 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 794 void (*pmp_attach)(struct ata_port *ap); 795 void (*pmp_detach)(struct ata_port *ap); 796 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 797 void (*disable_pm)(struct ata_port *ap); 798 799 /* 800 * Start, stop, suspend and resume 801 */ 802 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 803 int (*port_resume)(struct ata_port *ap); 804 int (*port_start)(struct ata_port *ap); 805 void (*port_stop)(struct ata_port *ap); 806 void (*host_stop)(struct ata_host *host); 807 808 #ifdef CONFIG_ATA_SFF 809 /* 810 * SFF / taskfile oriented ops 811 */ 812 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 813 u8 (*sff_check_status)(struct ata_port *ap); 814 u8 (*sff_check_altstatus)(struct ata_port *ap); 815 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 816 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 817 void (*sff_exec_command)(struct ata_port *ap, 818 const struct ata_taskfile *tf); 819 unsigned int (*sff_data_xfer)(struct ata_device *dev, 820 unsigned char *buf, unsigned int buflen, int rw); 821 u8 (*sff_irq_on)(struct ata_port *); 822 void (*sff_irq_clear)(struct ata_port *); 823 824 void (*bmdma_setup)(struct ata_queued_cmd *qc); 825 void (*bmdma_start)(struct ata_queued_cmd *qc); 826 void (*bmdma_stop)(struct ata_queued_cmd *qc); 827 u8 (*bmdma_status)(struct ata_port *ap); 828 #endif /* CONFIG_ATA_SFF */ 829 830 ssize_t (*em_show)(struct ata_port *ap, char *buf); 831 ssize_t (*em_store)(struct ata_port *ap, const char *message, 832 size_t size); 833 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 834 ssize_t (*sw_activity_store)(struct ata_device *dev, 835 enum sw_activity val); 836 /* 837 * Obsolete 838 */ 839 void (*phy_reset)(struct ata_port *ap); 840 void (*eng_timeout)(struct ata_port *ap); 841 842 /* 843 * ->inherits must be the last field and all the preceding 844 * fields must be pointers. 845 */ 846 const struct ata_port_operations *inherits; 847 }; 848 849 struct ata_port_info { 850 unsigned long flags; 851 unsigned long link_flags; 852 unsigned long pio_mask; 853 unsigned long mwdma_mask; 854 unsigned long udma_mask; 855 struct ata_port_operations *port_ops; 856 void *private_data; 857 }; 858 859 struct ata_timing { 860 unsigned short mode; /* ATA mode */ 861 unsigned short setup; /* t1 */ 862 unsigned short act8b; /* t2 for 8-bit I/O */ 863 unsigned short rec8b; /* t2i for 8-bit I/O */ 864 unsigned short cyc8b; /* t0 for 8-bit I/O */ 865 unsigned short active; /* t2 or tD */ 866 unsigned short recover; /* t2i or tK */ 867 unsigned short cycle; /* t0 */ 868 unsigned short udma; /* t2CYCTYP/2 */ 869 }; 870 871 /* 872 * Core layer - drivers/ata/libata-core.c 873 */ 874 extern const unsigned long sata_deb_timing_normal[]; 875 extern const unsigned long sata_deb_timing_hotplug[]; 876 extern const unsigned long sata_deb_timing_long[]; 877 878 extern struct ata_port_operations ata_dummy_port_ops; 879 extern const struct ata_port_info ata_dummy_port_info; 880 881 static inline const unsigned long * 882 sata_ehc_deb_timing(struct ata_eh_context *ehc) 883 { 884 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 885 return sata_deb_timing_hotplug; 886 else 887 return sata_deb_timing_normal; 888 } 889 890 static inline int ata_port_is_dummy(struct ata_port *ap) 891 { 892 return ap->ops == &ata_dummy_port_ops; 893 } 894 895 extern void ata_port_probe(struct ata_port *); 896 extern int sata_set_spd(struct ata_link *link); 897 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 898 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 899 int (*check_ready)(struct ata_link *link)); 900 extern int sata_link_debounce(struct ata_link *link, 901 const unsigned long *params, unsigned long deadline); 902 extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 903 unsigned long deadline); 904 extern int sata_link_hardreset(struct ata_link *link, 905 const unsigned long *timing, unsigned long deadline, 906 bool *online, int (*check_ready)(struct ata_link *)); 907 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 908 unsigned long deadline); 909 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 910 extern void ata_port_disable(struct ata_port *); 911 912 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 913 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 914 const struct ata_port_info * const * ppi, int n_ports); 915 extern int ata_slave_link_init(struct ata_port *ap); 916 extern int ata_host_start(struct ata_host *host); 917 extern int ata_host_register(struct ata_host *host, 918 struct scsi_host_template *sht); 919 extern int ata_host_activate(struct ata_host *host, int irq, 920 irq_handler_t irq_handler, unsigned long irq_flags, 921 struct scsi_host_template *sht); 922 extern void ata_host_detach(struct ata_host *host); 923 extern void ata_host_init(struct ata_host *, struct device *, 924 unsigned long, struct ata_port_operations *); 925 extern int ata_scsi_detect(struct scsi_host_template *sht); 926 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 927 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 928 extern void ata_sas_port_destroy(struct ata_port *); 929 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 930 struct ata_port_info *, struct Scsi_Host *); 931 extern int ata_sas_port_init(struct ata_port *); 932 extern int ata_sas_port_start(struct ata_port *ap); 933 extern void ata_sas_port_stop(struct ata_port *ap); 934 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 935 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 936 struct ata_port *ap); 937 extern int sata_scr_valid(struct ata_link *link); 938 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 939 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 940 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 941 extern bool ata_link_online(struct ata_link *link); 942 extern bool ata_link_offline(struct ata_link *link); 943 #ifdef CONFIG_PM 944 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 945 extern void ata_host_resume(struct ata_host *host); 946 #endif 947 extern int ata_ratelimit(void); 948 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 949 unsigned long interval, unsigned long timeout); 950 extern int atapi_cmd_type(u8 opcode); 951 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 952 u8 pmp, int is_cmd, u8 *fis); 953 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 954 extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 955 unsigned long mwdma_mask, unsigned long udma_mask); 956 extern void ata_unpack_xfermask(unsigned long xfer_mask, 957 unsigned long *pio_mask, unsigned long *mwdma_mask, 958 unsigned long *udma_mask); 959 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 960 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 961 extern int ata_xfer_mode2shift(unsigned long xfer_mode); 962 extern const char *ata_mode_string(unsigned long xfer_mask); 963 extern unsigned long ata_id_xfermask(const u16 *id); 964 extern int ata_port_start(struct ata_port *ap); 965 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 966 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 967 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 968 unsigned int n_elem); 969 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 970 extern void ata_dev_disable(struct ata_device *adev); 971 extern void ata_id_string(const u16 *id, unsigned char *s, 972 unsigned int ofs, unsigned int len); 973 extern void ata_id_c_string(const u16 *id, unsigned char *s, 974 unsigned int ofs, unsigned int len); 975 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 976 struct ata_taskfile *tf, u16 *id); 977 extern void ata_qc_complete(struct ata_queued_cmd *qc); 978 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 979 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 980 void (*done)(struct scsi_cmnd *)); 981 extern int ata_std_bios_param(struct scsi_device *sdev, 982 struct block_device *bdev, 983 sector_t capacity, int geom[]); 984 extern int ata_scsi_slave_config(struct scsi_device *sdev); 985 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 986 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 987 int queue_depth); 988 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 989 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 990 991 extern int ata_cable_40wire(struct ata_port *ap); 992 extern int ata_cable_80wire(struct ata_port *ap); 993 extern int ata_cable_sata(struct ata_port *ap); 994 extern int ata_cable_ignore(struct ata_port *ap); 995 extern int ata_cable_unknown(struct ata_port *ap); 996 997 /* Timing helpers */ 998 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 999 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1000 extern int ata_timing_compute(struct ata_device *, unsigned short, 1001 struct ata_timing *, int, int); 1002 extern void ata_timing_merge(const struct ata_timing *, 1003 const struct ata_timing *, struct ata_timing *, 1004 unsigned int); 1005 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1006 1007 /* PCI */ 1008 #ifdef CONFIG_PCI 1009 struct pci_dev; 1010 1011 struct pci_bits { 1012 unsigned int reg; /* PCI config register to read */ 1013 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1014 unsigned long mask; 1015 unsigned long val; 1016 }; 1017 1018 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1019 extern void ata_pci_remove_one(struct pci_dev *pdev); 1020 1021 #ifdef CONFIG_PM 1022 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1023 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1024 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1025 extern int ata_pci_device_resume(struct pci_dev *pdev); 1026 #endif /* CONFIG_PM */ 1027 #endif /* CONFIG_PCI */ 1028 1029 /* 1030 * ACPI - drivers/ata/libata-acpi.c 1031 */ 1032 #ifdef CONFIG_ATA_ACPI 1033 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1034 { 1035 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1036 return &ap->__acpi_init_gtm; 1037 return NULL; 1038 } 1039 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1040 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1041 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1042 const struct ata_acpi_gtm *gtm); 1043 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1044 #else 1045 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1046 { 1047 return NULL; 1048 } 1049 1050 static inline int ata_acpi_stm(const struct ata_port *ap, 1051 struct ata_acpi_gtm *stm) 1052 { 1053 return -ENOSYS; 1054 } 1055 1056 static inline int ata_acpi_gtm(const struct ata_port *ap, 1057 struct ata_acpi_gtm *stm) 1058 { 1059 return -ENOSYS; 1060 } 1061 1062 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1063 const struct ata_acpi_gtm *gtm) 1064 { 1065 return 0; 1066 } 1067 1068 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1069 const struct ata_acpi_gtm *gtm) 1070 { 1071 return 0; 1072 } 1073 #endif 1074 1075 /* 1076 * EH - drivers/ata/libata-eh.c 1077 */ 1078 extern void ata_port_schedule_eh(struct ata_port *ap); 1079 extern int ata_link_abort(struct ata_link *link); 1080 extern int ata_port_abort(struct ata_port *ap); 1081 extern int ata_port_freeze(struct ata_port *ap); 1082 extern int sata_async_notification(struct ata_port *ap); 1083 1084 extern void ata_eh_freeze_port(struct ata_port *ap); 1085 extern void ata_eh_thaw_port(struct ata_port *ap); 1086 1087 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1088 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1089 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1090 1091 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1092 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1093 ata_postreset_fn_t postreset); 1094 extern void ata_std_error_handler(struct ata_port *ap); 1095 1096 /* 1097 * Base operations to inherit from and initializers for sht 1098 * 1099 * Operations 1100 * 1101 * base : Common to all libata drivers. 1102 * sata : SATA controllers w/ native interface. 1103 * pmp : SATA controllers w/ PMP support. 1104 * sff : SFF ATA controllers w/o BMDMA support. 1105 * bmdma : SFF ATA controllers w/ BMDMA support. 1106 * 1107 * sht initializers 1108 * 1109 * BASE : Common to all libata drivers. The user must set 1110 * sg_tablesize and dma_boundary. 1111 * PIO : SFF ATA controllers w/ only PIO support. 1112 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1113 * dma_boundary are set to BMDMA limits. 1114 * NCQ : SATA controllers supporting NCQ. The user must set 1115 * sg_tablesize, dma_boundary and can_queue. 1116 */ 1117 extern const struct ata_port_operations ata_base_port_ops; 1118 extern const struct ata_port_operations sata_port_ops; 1119 extern struct device_attribute *ata_common_sdev_attrs[]; 1120 1121 #define ATA_BASE_SHT(drv_name) \ 1122 .module = THIS_MODULE, \ 1123 .name = drv_name, \ 1124 .ioctl = ata_scsi_ioctl, \ 1125 .queuecommand = ata_scsi_queuecmd, \ 1126 .can_queue = ATA_DEF_QUEUE, \ 1127 .this_id = ATA_SHT_THIS_ID, \ 1128 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1129 .emulated = ATA_SHT_EMULATED, \ 1130 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1131 .proc_name = drv_name, \ 1132 .slave_configure = ata_scsi_slave_config, \ 1133 .slave_destroy = ata_scsi_slave_destroy, \ 1134 .bios_param = ata_std_bios_param, \ 1135 .sdev_attrs = ata_common_sdev_attrs 1136 1137 #define ATA_NCQ_SHT(drv_name) \ 1138 ATA_BASE_SHT(drv_name), \ 1139 .change_queue_depth = ata_scsi_change_queue_depth 1140 1141 /* 1142 * PMP helpers 1143 */ 1144 #ifdef CONFIG_SATA_PMP 1145 static inline bool sata_pmp_supported(struct ata_port *ap) 1146 { 1147 return ap->flags & ATA_FLAG_PMP; 1148 } 1149 1150 static inline bool sata_pmp_attached(struct ata_port *ap) 1151 { 1152 return ap->nr_pmp_links != 0; 1153 } 1154 1155 static inline int ata_is_host_link(const struct ata_link *link) 1156 { 1157 return link == &link->ap->link || link == link->ap->slave_link; 1158 } 1159 #else /* CONFIG_SATA_PMP */ 1160 static inline bool sata_pmp_supported(struct ata_port *ap) 1161 { 1162 return false; 1163 } 1164 1165 static inline bool sata_pmp_attached(struct ata_port *ap) 1166 { 1167 return false; 1168 } 1169 1170 static inline int ata_is_host_link(const struct ata_link *link) 1171 { 1172 return 1; 1173 } 1174 #endif /* CONFIG_SATA_PMP */ 1175 1176 static inline int sata_srst_pmp(struct ata_link *link) 1177 { 1178 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1179 return SATA_PMP_CTRL_PORT; 1180 return link->pmp; 1181 } 1182 1183 /* 1184 * printk helpers 1185 */ 1186 #define ata_port_printk(ap, lv, fmt, args...) \ 1187 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1188 1189 #define ata_link_printk(link, lv, fmt, args...) do { \ 1190 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1191 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1192 (link)->pmp , ##args); \ 1193 else \ 1194 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1195 } while(0) 1196 1197 #define ata_dev_printk(dev, lv, fmt, args...) \ 1198 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1199 (dev)->link->pmp + (dev)->devno , ##args) 1200 1201 /* 1202 * ata_eh_info helpers 1203 */ 1204 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1205 __attribute__ ((format (printf, 2, 3))); 1206 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1207 __attribute__ ((format (printf, 2, 3))); 1208 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1209 1210 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1211 { 1212 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1213 ehi->flags |= ATA_EHI_HOTPLUGGED; 1214 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1215 ehi->err_mask |= AC_ERR_ATA_BUS; 1216 } 1217 1218 /* 1219 * port description helpers 1220 */ 1221 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1222 __attribute__ ((format (printf, 2, 3))); 1223 #ifdef CONFIG_PCI 1224 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1225 const char *name); 1226 #endif 1227 1228 static inline unsigned int ata_tag_valid(unsigned int tag) 1229 { 1230 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1231 } 1232 1233 static inline unsigned int ata_tag_internal(unsigned int tag) 1234 { 1235 return tag == ATA_TAG_INTERNAL; 1236 } 1237 1238 /* 1239 * device helpers 1240 */ 1241 static inline unsigned int ata_class_enabled(unsigned int class) 1242 { 1243 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1244 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1245 } 1246 1247 static inline unsigned int ata_class_disabled(unsigned int class) 1248 { 1249 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1250 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1251 } 1252 1253 static inline unsigned int ata_class_absent(unsigned int class) 1254 { 1255 return !ata_class_enabled(class) && !ata_class_disabled(class); 1256 } 1257 1258 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1259 { 1260 return ata_class_enabled(dev->class); 1261 } 1262 1263 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1264 { 1265 return ata_class_disabled(dev->class); 1266 } 1267 1268 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1269 { 1270 return ata_class_absent(dev->class); 1271 } 1272 1273 /* 1274 * link helpers 1275 */ 1276 static inline int ata_link_max_devices(const struct ata_link *link) 1277 { 1278 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1279 return 2; 1280 return 1; 1281 } 1282 1283 static inline int ata_link_active(struct ata_link *link) 1284 { 1285 return ata_tag_valid(link->active_tag) || link->sactive; 1286 } 1287 1288 extern struct ata_link *__ata_port_next_link(struct ata_port *ap, 1289 struct ata_link *link, 1290 bool dev_only); 1291 1292 #define __ata_port_for_each_link(link, ap) \ 1293 for ((link) = __ata_port_next_link((ap), NULL, false); (link); \ 1294 (link) = __ata_port_next_link((ap), (link), false)) 1295 1296 #define ata_port_for_each_link(link, ap) \ 1297 for ((link) = __ata_port_next_link((ap), NULL, true); (link); \ 1298 (link) = __ata_port_next_link((ap), (link), true)) 1299 1300 #define ata_link_for_each_dev(dev, link) \ 1301 for ((dev) = (link)->device; \ 1302 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \ 1303 (dev)++) 1304 1305 #define ata_link_for_each_dev_reverse(dev, link) \ 1306 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \ 1307 (dev) >= (link)->device || ((dev) = NULL); (dev)--) 1308 1309 /** 1310 * ata_ncq_enabled - Test whether NCQ is enabled 1311 * @dev: ATA device to test for 1312 * 1313 * LOCKING: 1314 * spin_lock_irqsave(host lock) 1315 * 1316 * RETURNS: 1317 * 1 if NCQ is enabled for @dev, 0 otherwise. 1318 */ 1319 static inline int ata_ncq_enabled(struct ata_device *dev) 1320 { 1321 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1322 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1323 } 1324 1325 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1326 { 1327 qc->tf.ctl |= ATA_NIEN; 1328 } 1329 1330 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1331 unsigned int tag) 1332 { 1333 if (likely(ata_tag_valid(tag))) 1334 return &ap->qcmd[tag]; 1335 return NULL; 1336 } 1337 1338 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1339 unsigned int tag) 1340 { 1341 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1342 1343 if (unlikely(!qc) || !ap->ops->error_handler) 1344 return qc; 1345 1346 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1347 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1348 return qc; 1349 1350 return NULL; 1351 } 1352 1353 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1354 { 1355 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1356 } 1357 1358 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1359 { 1360 memset(tf, 0, sizeof(*tf)); 1361 1362 tf->ctl = dev->link->ap->ctl; 1363 if (dev->devno == 0) 1364 tf->device = ATA_DEVICE_OBS; 1365 else 1366 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1367 } 1368 1369 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1370 { 1371 qc->dma_dir = DMA_NONE; 1372 qc->sg = NULL; 1373 qc->flags = 0; 1374 qc->cursg = NULL; 1375 qc->cursg_ofs = 0; 1376 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1377 qc->n_elem = 0; 1378 qc->err_mask = 0; 1379 qc->sect_size = ATA_SECT_SIZE; 1380 1381 ata_tf_init(qc->dev, &qc->tf); 1382 1383 /* init result_tf such that it indicates normal completion */ 1384 qc->result_tf.command = ATA_DRDY; 1385 qc->result_tf.feature = 0; 1386 } 1387 1388 static inline int ata_try_flush_cache(const struct ata_device *dev) 1389 { 1390 return ata_id_wcache_enabled(dev->id) || 1391 ata_id_has_flush(dev->id) || 1392 ata_id_has_flush_ext(dev->id); 1393 } 1394 1395 static inline unsigned int ac_err_mask(u8 status) 1396 { 1397 if (status & (ATA_BUSY | ATA_DRQ)) 1398 return AC_ERR_HSM; 1399 if (status & (ATA_ERR | ATA_DF)) 1400 return AC_ERR_DEV; 1401 return 0; 1402 } 1403 1404 static inline unsigned int __ac_err_mask(u8 status) 1405 { 1406 unsigned int mask = ac_err_mask(status); 1407 if (mask == 0) 1408 return AC_ERR_OTHER; 1409 return mask; 1410 } 1411 1412 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1413 { 1414 return *(struct ata_port **)&host->hostdata[0]; 1415 } 1416 1417 static inline int ata_check_ready(u8 status) 1418 { 1419 if (!(status & ATA_BUSY)) 1420 return 1; 1421 1422 /* 0xff indicates either no device or device not ready */ 1423 if (status == 0xff) 1424 return -ENODEV; 1425 1426 return 0; 1427 } 1428 1429 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1430 unsigned long timeout_msecs) 1431 { 1432 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1433 } 1434 1435 /* Don't open code these in drivers as there are traps. Firstly the range may 1436 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1437 > UDMA_0. Dyma ddreigiau */ 1438 1439 static inline int ata_using_mwdma(struct ata_device *adev) 1440 { 1441 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1442 return 1; 1443 return 0; 1444 } 1445 1446 static inline int ata_using_udma(struct ata_device *adev) 1447 { 1448 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1449 return 1; 1450 return 0; 1451 } 1452 1453 static inline int ata_dma_enabled(struct ata_device *adev) 1454 { 1455 return (adev->dma_mode == 0xFF ? 0 : 1); 1456 } 1457 1458 /************************************************************************** 1459 * PMP - drivers/ata/libata-pmp.c 1460 */ 1461 #ifdef CONFIG_SATA_PMP 1462 1463 extern const struct ata_port_operations sata_pmp_port_ops; 1464 1465 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1466 extern void sata_pmp_error_handler(struct ata_port *ap); 1467 1468 #else /* CONFIG_SATA_PMP */ 1469 1470 #define sata_pmp_port_ops sata_port_ops 1471 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1472 #define sata_pmp_error_handler ata_std_error_handler 1473 1474 #endif /* CONFIG_SATA_PMP */ 1475 1476 1477 /************************************************************************** 1478 * SFF - drivers/ata/libata-sff.c 1479 */ 1480 #ifdef CONFIG_ATA_SFF 1481 1482 extern const struct ata_port_operations ata_sff_port_ops; 1483 extern const struct ata_port_operations ata_bmdma_port_ops; 1484 1485 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1486 #define ATA_PIO_SHT(drv_name) \ 1487 ATA_BASE_SHT(drv_name), \ 1488 .sg_tablesize = LIBATA_MAX_PRD, \ 1489 .dma_boundary = ATA_DMA_BOUNDARY 1490 1491 #define ATA_BMDMA_SHT(drv_name) \ 1492 ATA_BASE_SHT(drv_name), \ 1493 .sg_tablesize = LIBATA_MAX_PRD, \ 1494 .dma_boundary = ATA_DMA_BOUNDARY 1495 1496 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc); 1497 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc); 1498 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1499 extern u8 ata_sff_check_status(struct ata_port *ap); 1500 extern void ata_sff_pause(struct ata_port *ap); 1501 extern void ata_sff_dma_pause(struct ata_port *ap); 1502 extern int ata_sff_busy_sleep(struct ata_port *ap, 1503 unsigned long timeout_pat, unsigned long timeout); 1504 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1505 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1506 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1507 extern void ata_sff_exec_command(struct ata_port *ap, 1508 const struct ata_taskfile *tf); 1509 extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1510 unsigned char *buf, unsigned int buflen, int rw); 1511 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1512 unsigned char *buf, unsigned int buflen, int rw); 1513 extern u8 ata_sff_irq_on(struct ata_port *ap); 1514 extern void ata_sff_irq_clear(struct ata_port *ap); 1515 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1516 u8 status, int in_wq); 1517 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1518 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1519 extern unsigned int ata_sff_host_intr(struct ata_port *ap, 1520 struct ata_queued_cmd *qc); 1521 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1522 extern void ata_sff_freeze(struct ata_port *ap); 1523 extern void ata_sff_thaw(struct ata_port *ap); 1524 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1525 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1526 u8 *r_err); 1527 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1528 unsigned long deadline); 1529 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1530 unsigned long deadline); 1531 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1532 unsigned long deadline); 1533 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1534 extern void ata_sff_error_handler(struct ata_port *ap); 1535 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc); 1536 extern int ata_sff_port_start(struct ata_port *ap); 1537 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1538 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev, 1539 unsigned long xfer_mask); 1540 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1541 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1542 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1543 extern u8 ata_bmdma_status(struct ata_port *ap); 1544 extern void ata_bus_reset(struct ata_port *ap); 1545 1546 #ifdef CONFIG_PCI 1547 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1548 extern int ata_pci_bmdma_init(struct ata_host *host); 1549 extern int ata_pci_sff_init_host(struct ata_host *host); 1550 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1551 const struct ata_port_info * const * ppi, 1552 struct ata_host **r_host); 1553 extern int ata_pci_sff_activate_host(struct ata_host *host, 1554 irq_handler_t irq_handler, 1555 struct scsi_host_template *sht); 1556 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1557 const struct ata_port_info * const * ppi, 1558 struct scsi_host_template *sht, void *host_priv); 1559 #endif /* CONFIG_PCI */ 1560 1561 /** 1562 * ata_sff_busy_wait - Wait for a port status register 1563 * @ap: Port to wait for. 1564 * @bits: bits that must be clear 1565 * @max: number of 10uS waits to perform 1566 * 1567 * Waits up to max*10 microseconds for the selected bits in the port's 1568 * status register to be cleared. 1569 * Returns final value of status register. 1570 * 1571 * LOCKING: 1572 * Inherited from caller. 1573 */ 1574 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1575 unsigned int max) 1576 { 1577 u8 status; 1578 1579 do { 1580 udelay(10); 1581 status = ap->ops->sff_check_status(ap); 1582 max--; 1583 } while (status != 0xff && (status & bits) && (max > 0)); 1584 1585 return status; 1586 } 1587 1588 /** 1589 * ata_wait_idle - Wait for a port to be idle. 1590 * @ap: Port to wait for. 1591 * 1592 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1593 * Returns final value of status register. 1594 * 1595 * LOCKING: 1596 * Inherited from caller. 1597 */ 1598 static inline u8 ata_wait_idle(struct ata_port *ap) 1599 { 1600 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1601 1602 #ifdef ATA_DEBUG 1603 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1604 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1605 status); 1606 #endif 1607 1608 return status; 1609 } 1610 #endif /* CONFIG_ATA_SFF */ 1611 1612 #endif /* __LINUX_LIBATA_H__ */ 1613