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 */ 378 379 /* DMA mask for user DMA control: User visible values; DO NOT 380 renumber */ 381 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 382 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 383 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 384 385 /* ATAPI command types */ 386 ATAPI_READ = 0, /* READs */ 387 ATAPI_WRITE = 1, /* WRITEs */ 388 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 389 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 390 ATAPI_MISC = 4, /* the rest */ 391 392 /* Timing constants */ 393 ATA_TIMING_SETUP = (1 << 0), 394 ATA_TIMING_ACT8B = (1 << 1), 395 ATA_TIMING_REC8B = (1 << 2), 396 ATA_TIMING_CYC8B = (1 << 3), 397 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 398 ATA_TIMING_CYC8B, 399 ATA_TIMING_ACTIVE = (1 << 4), 400 ATA_TIMING_RECOVER = (1 << 5), 401 ATA_TIMING_CYCLE = (1 << 6), 402 ATA_TIMING_UDMA = (1 << 7), 403 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 404 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 405 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 406 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 407 }; 408 409 enum ata_xfer_mask { 410 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 411 << ATA_SHIFT_PIO, 412 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 413 << ATA_SHIFT_MWDMA, 414 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 415 << ATA_SHIFT_UDMA, 416 }; 417 418 enum hsm_task_states { 419 HSM_ST_IDLE, /* no command on going */ 420 HSM_ST_FIRST, /* (waiting the device to) 421 write CDB or first data block */ 422 HSM_ST, /* (waiting the device to) transfer data */ 423 HSM_ST_LAST, /* (waiting the device to) complete command */ 424 HSM_ST_ERR, /* error */ 425 }; 426 427 enum ata_completion_errors { 428 AC_ERR_DEV = (1 << 0), /* device reported error */ 429 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 430 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 431 AC_ERR_MEDIA = (1 << 3), /* media error */ 432 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 433 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 434 AC_ERR_SYSTEM = (1 << 6), /* system error */ 435 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 436 AC_ERR_OTHER = (1 << 8), /* unknown */ 437 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 438 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 439 }; 440 441 /* forward declarations */ 442 struct scsi_device; 443 struct ata_port_operations; 444 struct ata_port; 445 struct ata_link; 446 struct ata_queued_cmd; 447 448 /* typedefs */ 449 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 450 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 451 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 452 unsigned long deadline); 453 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 454 455 /* 456 * host pm policy: If you alter this, you also need to alter libata-scsi.c 457 * (for the ascii descriptions) 458 */ 459 enum link_pm { 460 NOT_AVAILABLE, 461 MIN_POWER, 462 MAX_PERFORMANCE, 463 MEDIUM_POWER, 464 }; 465 extern struct device_attribute dev_attr_link_power_management_policy; 466 extern struct device_attribute dev_attr_unload_heads; 467 extern struct device_attribute dev_attr_em_message_type; 468 extern struct device_attribute dev_attr_em_message; 469 extern struct device_attribute dev_attr_sw_activity; 470 471 enum sw_activity { 472 OFF, 473 BLINK_ON, 474 BLINK_OFF, 475 }; 476 477 #ifdef CONFIG_ATA_SFF 478 struct ata_ioports { 479 void __iomem *cmd_addr; 480 void __iomem *data_addr; 481 void __iomem *error_addr; 482 void __iomem *feature_addr; 483 void __iomem *nsect_addr; 484 void __iomem *lbal_addr; 485 void __iomem *lbam_addr; 486 void __iomem *lbah_addr; 487 void __iomem *device_addr; 488 void __iomem *status_addr; 489 void __iomem *command_addr; 490 void __iomem *altstatus_addr; 491 void __iomem *ctl_addr; 492 void __iomem *bmdma_addr; 493 void __iomem *scr_addr; 494 }; 495 #endif /* CONFIG_ATA_SFF */ 496 497 struct ata_host { 498 spinlock_t lock; 499 struct device *dev; 500 void __iomem * const *iomap; 501 unsigned int n_ports; 502 void *private_data; 503 struct ata_port_operations *ops; 504 unsigned long flags; 505 #ifdef CONFIG_ATA_ACPI 506 acpi_handle acpi_handle; 507 #endif 508 struct ata_port *simplex_claimed; /* channel owning the DMA */ 509 struct ata_port *ports[0]; 510 }; 511 512 struct ata_queued_cmd { 513 struct ata_port *ap; 514 struct ata_device *dev; 515 516 struct scsi_cmnd *scsicmd; 517 void (*scsidone)(struct scsi_cmnd *); 518 519 struct ata_taskfile tf; 520 u8 cdb[ATAPI_CDB_LEN]; 521 522 unsigned long flags; /* ATA_QCFLAG_xxx */ 523 unsigned int tag; 524 unsigned int n_elem; 525 526 int dma_dir; 527 528 unsigned int sect_size; 529 530 unsigned int nbytes; 531 unsigned int extrabytes; 532 unsigned int curbytes; 533 534 struct scatterlist *cursg; 535 unsigned int cursg_ofs; 536 537 struct scatterlist sgent; 538 539 struct scatterlist *sg; 540 541 unsigned int err_mask; 542 struct ata_taskfile result_tf; 543 ata_qc_cb_t complete_fn; 544 545 void *private_data; 546 void *lldd_task; 547 }; 548 549 struct ata_port_stats { 550 unsigned long unhandled_irq; 551 unsigned long idle_irq; 552 unsigned long rw_reqbuf; 553 }; 554 555 struct ata_ering_entry { 556 unsigned int eflags; 557 unsigned int err_mask; 558 u64 timestamp; 559 }; 560 561 struct ata_ering { 562 int cursor; 563 struct ata_ering_entry ring[ATA_ERING_SIZE]; 564 }; 565 566 struct ata_device { 567 struct ata_link *link; 568 unsigned int devno; /* 0 or 1 */ 569 unsigned int horkage; /* List of broken features */ 570 unsigned long flags; /* ATA_DFLAG_xxx */ 571 struct scsi_device *sdev; /* attached SCSI device */ 572 #ifdef CONFIG_ATA_ACPI 573 acpi_handle acpi_handle; 574 union acpi_object *gtf_cache; 575 #endif 576 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 577 u64 n_sectors; /* size of device, if ATA */ 578 unsigned int class; /* ATA_DEV_xxx */ 579 unsigned long unpark_deadline; 580 581 u8 pio_mode; 582 u8 dma_mode; 583 u8 xfer_mode; 584 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 585 586 unsigned int multi_count; /* sectors count for 587 READ/WRITE MULTIPLE */ 588 unsigned int max_sectors; /* per-device max sectors */ 589 unsigned int cdb_len; 590 591 /* per-dev xfer mask */ 592 unsigned long pio_mask; 593 unsigned long mwdma_mask; 594 unsigned long udma_mask; 595 596 /* for CHS addressing */ 597 u16 cylinders; /* Number of cylinders */ 598 u16 heads; /* Number of heads */ 599 u16 sectors; /* Number of sectors per track */ 600 601 /* error history */ 602 int spdn_cnt; 603 struct ata_ering ering; 604 605 union { 606 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 607 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 608 }; 609 }; 610 611 /* Offset into struct ata_device. Fields above it are maintained 612 * acress device init. Fields below are zeroed. 613 */ 614 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 615 616 struct ata_eh_info { 617 struct ata_device *dev; /* offending device */ 618 u32 serror; /* SError from LLDD */ 619 unsigned int err_mask; /* port-wide err_mask */ 620 unsigned int action; /* ATA_EH_* action mask */ 621 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 622 unsigned int flags; /* ATA_EHI_* flags */ 623 624 unsigned int probe_mask; 625 626 char desc[ATA_EH_DESC_LEN]; 627 int desc_len; 628 }; 629 630 struct ata_eh_context { 631 struct ata_eh_info i; 632 int tries[ATA_MAX_DEVICES]; 633 int cmd_timeout_idx[ATA_MAX_DEVICES] 634 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 635 unsigned int classes[ATA_MAX_DEVICES]; 636 unsigned int did_probe_mask; 637 unsigned int unloaded_mask; 638 unsigned int saved_ncq_enabled; 639 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 640 /* timestamp for the last reset attempt or success */ 641 unsigned long last_reset; 642 }; 643 644 struct ata_acpi_drive 645 { 646 u32 pio; 647 u32 dma; 648 } __packed; 649 650 struct ata_acpi_gtm { 651 struct ata_acpi_drive drive[2]; 652 u32 flags; 653 } __packed; 654 655 struct ata_link { 656 struct ata_port *ap; 657 int pmp; /* port multiplier port # */ 658 659 unsigned int active_tag; /* active tag on this link */ 660 u32 sactive; /* active NCQ commands */ 661 662 unsigned int flags; /* ATA_LFLAG_xxx */ 663 664 u32 saved_scontrol; /* SControl on probe */ 665 unsigned int hw_sata_spd_limit; 666 unsigned int sata_spd_limit; 667 unsigned int sata_spd; /* current SATA PHY speed */ 668 669 /* record runtime error info, protected by host_set lock */ 670 struct ata_eh_info eh_info; 671 /* EH context */ 672 struct ata_eh_context eh_context; 673 674 struct ata_device device[ATA_MAX_DEVICES]; 675 }; 676 677 struct ata_port { 678 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 679 struct ata_port_operations *ops; 680 spinlock_t *lock; 681 unsigned long flags; /* ATA_FLAG_xxx */ 682 unsigned int pflags; /* ATA_PFLAG_xxx */ 683 unsigned int print_id; /* user visible unique port ID */ 684 unsigned int port_no; /* 0 based port no. inside the host */ 685 686 struct ata_prd *prd; /* our SG list */ 687 dma_addr_t prd_dma; /* and its DMA mapping */ 688 689 #ifdef CONFIG_ATA_SFF 690 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 691 #endif /* CONFIG_ATA_SFF */ 692 693 u8 ctl; /* cache of ATA control register */ 694 u8 last_ctl; /* Cache last written value */ 695 unsigned int pio_mask; 696 unsigned int mwdma_mask; 697 unsigned int udma_mask; 698 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 699 700 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 701 unsigned int qc_active; 702 int nr_active_links; /* #links with active qcs */ 703 704 struct ata_link link; /* host default link */ 705 struct ata_link *slave_link; /* see ata_slave_link_init() */ 706 707 int nr_pmp_links; /* nr of available PMP links */ 708 struct ata_link *pmp_link; /* array of PMP links */ 709 struct ata_link *excl_link; /* for PMP qc exclusion */ 710 711 struct ata_port_stats stats; 712 struct ata_host *host; 713 struct device *dev; 714 715 void *port_task_data; 716 struct delayed_work port_task; 717 struct delayed_work hotplug_task; 718 struct work_struct scsi_rescan_task; 719 720 unsigned int hsm_task_state; 721 722 u32 msg_enable; 723 struct list_head eh_done_q; 724 wait_queue_head_t eh_wait_q; 725 int eh_tries; 726 struct completion park_req_pending; 727 728 pm_message_t pm_mesg; 729 int *pm_result; 730 enum link_pm pm_policy; 731 732 struct timer_list fastdrain_timer; 733 unsigned long fastdrain_cnt; 734 735 int em_message_type; 736 void *private_data; 737 738 #ifdef CONFIG_ATA_ACPI 739 acpi_handle acpi_handle; 740 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 741 #endif 742 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 743 }; 744 745 /* The following initializer overrides a method to NULL whether one of 746 * its parent has the method defined or not. This is equivalent to 747 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 748 * expression and thus can't be used as an initializer. 749 */ 750 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 751 752 struct ata_port_operations { 753 /* 754 * Command execution 755 */ 756 int (*qc_defer)(struct ata_queued_cmd *qc); 757 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 758 void (*qc_prep)(struct ata_queued_cmd *qc); 759 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 760 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 761 762 /* 763 * Configuration and exception handling 764 */ 765 int (*cable_detect)(struct ata_port *ap); 766 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 767 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 768 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 769 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 770 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 771 772 void (*dev_config)(struct ata_device *dev); 773 774 void (*freeze)(struct ata_port *ap); 775 void (*thaw)(struct ata_port *ap); 776 ata_prereset_fn_t prereset; 777 ata_reset_fn_t softreset; 778 ata_reset_fn_t hardreset; 779 ata_postreset_fn_t postreset; 780 ata_prereset_fn_t pmp_prereset; 781 ata_reset_fn_t pmp_softreset; 782 ata_reset_fn_t pmp_hardreset; 783 ata_postreset_fn_t pmp_postreset; 784 void (*error_handler)(struct ata_port *ap); 785 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 786 787 /* 788 * Optional features 789 */ 790 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 791 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 792 void (*pmp_attach)(struct ata_port *ap); 793 void (*pmp_detach)(struct ata_port *ap); 794 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 795 void (*disable_pm)(struct ata_port *ap); 796 797 /* 798 * Start, stop, suspend and resume 799 */ 800 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 801 int (*port_resume)(struct ata_port *ap); 802 int (*port_start)(struct ata_port *ap); 803 void (*port_stop)(struct ata_port *ap); 804 void (*host_stop)(struct ata_host *host); 805 806 #ifdef CONFIG_ATA_SFF 807 /* 808 * SFF / taskfile oriented ops 809 */ 810 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 811 u8 (*sff_check_status)(struct ata_port *ap); 812 u8 (*sff_check_altstatus)(struct ata_port *ap); 813 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 814 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 815 void (*sff_exec_command)(struct ata_port *ap, 816 const struct ata_taskfile *tf); 817 unsigned int (*sff_data_xfer)(struct ata_device *dev, 818 unsigned char *buf, unsigned int buflen, int rw); 819 u8 (*sff_irq_on)(struct ata_port *); 820 void (*sff_irq_clear)(struct ata_port *); 821 822 void (*bmdma_setup)(struct ata_queued_cmd *qc); 823 void (*bmdma_start)(struct ata_queued_cmd *qc); 824 void (*bmdma_stop)(struct ata_queued_cmd *qc); 825 u8 (*bmdma_status)(struct ata_port *ap); 826 #endif /* CONFIG_ATA_SFF */ 827 828 ssize_t (*em_show)(struct ata_port *ap, char *buf); 829 ssize_t (*em_store)(struct ata_port *ap, const char *message, 830 size_t size); 831 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 832 ssize_t (*sw_activity_store)(struct ata_device *dev, 833 enum sw_activity val); 834 /* 835 * Obsolete 836 */ 837 void (*phy_reset)(struct ata_port *ap); 838 void (*eng_timeout)(struct ata_port *ap); 839 840 /* 841 * ->inherits must be the last field and all the preceding 842 * fields must be pointers. 843 */ 844 const struct ata_port_operations *inherits; 845 }; 846 847 struct ata_port_info { 848 unsigned long flags; 849 unsigned long link_flags; 850 unsigned long pio_mask; 851 unsigned long mwdma_mask; 852 unsigned long udma_mask; 853 struct ata_port_operations *port_ops; 854 void *private_data; 855 }; 856 857 struct ata_timing { 858 unsigned short mode; /* ATA mode */ 859 unsigned short setup; /* t1 */ 860 unsigned short act8b; /* t2 for 8-bit I/O */ 861 unsigned short rec8b; /* t2i for 8-bit I/O */ 862 unsigned short cyc8b; /* t0 for 8-bit I/O */ 863 unsigned short active; /* t2 or tD */ 864 unsigned short recover; /* t2i or tK */ 865 unsigned short cycle; /* t0 */ 866 unsigned short udma; /* t2CYCTYP/2 */ 867 }; 868 869 /* 870 * Core layer - drivers/ata/libata-core.c 871 */ 872 extern const unsigned long sata_deb_timing_normal[]; 873 extern const unsigned long sata_deb_timing_hotplug[]; 874 extern const unsigned long sata_deb_timing_long[]; 875 876 extern struct ata_port_operations ata_dummy_port_ops; 877 extern const struct ata_port_info ata_dummy_port_info; 878 879 static inline const unsigned long * 880 sata_ehc_deb_timing(struct ata_eh_context *ehc) 881 { 882 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 883 return sata_deb_timing_hotplug; 884 else 885 return sata_deb_timing_normal; 886 } 887 888 static inline int ata_port_is_dummy(struct ata_port *ap) 889 { 890 return ap->ops == &ata_dummy_port_ops; 891 } 892 893 extern void ata_port_probe(struct ata_port *); 894 extern int sata_set_spd(struct ata_link *link); 895 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 896 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 897 int (*check_ready)(struct ata_link *link)); 898 extern int sata_link_debounce(struct ata_link *link, 899 const unsigned long *params, unsigned long deadline); 900 extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 901 unsigned long deadline); 902 extern int sata_link_hardreset(struct ata_link *link, 903 const unsigned long *timing, unsigned long deadline, 904 bool *online, int (*check_ready)(struct ata_link *)); 905 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 906 unsigned long deadline); 907 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 908 extern void ata_port_disable(struct ata_port *); 909 910 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 911 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 912 const struct ata_port_info * const * ppi, int n_ports); 913 extern int ata_slave_link_init(struct ata_port *ap); 914 extern int ata_host_start(struct ata_host *host); 915 extern int ata_host_register(struct ata_host *host, 916 struct scsi_host_template *sht); 917 extern int ata_host_activate(struct ata_host *host, int irq, 918 irq_handler_t irq_handler, unsigned long irq_flags, 919 struct scsi_host_template *sht); 920 extern void ata_host_detach(struct ata_host *host); 921 extern void ata_host_init(struct ata_host *, struct device *, 922 unsigned long, struct ata_port_operations *); 923 extern int ata_scsi_detect(struct scsi_host_template *sht); 924 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 925 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 926 extern void ata_sas_port_destroy(struct ata_port *); 927 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 928 struct ata_port_info *, struct Scsi_Host *); 929 extern int ata_sas_port_init(struct ata_port *); 930 extern int ata_sas_port_start(struct ata_port *ap); 931 extern void ata_sas_port_stop(struct ata_port *ap); 932 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 933 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 934 struct ata_port *ap); 935 extern int sata_scr_valid(struct ata_link *link); 936 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 937 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 938 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 939 extern bool ata_link_online(struct ata_link *link); 940 extern bool ata_link_offline(struct ata_link *link); 941 #ifdef CONFIG_PM 942 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 943 extern void ata_host_resume(struct ata_host *host); 944 #endif 945 extern int ata_ratelimit(void); 946 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 947 unsigned long interval, unsigned long timeout); 948 extern int atapi_cmd_type(u8 opcode); 949 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 950 u8 pmp, int is_cmd, u8 *fis); 951 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 952 extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 953 unsigned long mwdma_mask, unsigned long udma_mask); 954 extern void ata_unpack_xfermask(unsigned long xfer_mask, 955 unsigned long *pio_mask, unsigned long *mwdma_mask, 956 unsigned long *udma_mask); 957 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 958 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 959 extern int ata_xfer_mode2shift(unsigned long xfer_mode); 960 extern const char *ata_mode_string(unsigned long xfer_mask); 961 extern unsigned long ata_id_xfermask(const u16 *id); 962 extern int ata_port_start(struct ata_port *ap); 963 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 964 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 965 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 966 unsigned int n_elem); 967 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 968 extern void ata_dev_disable(struct ata_device *adev); 969 extern void ata_id_string(const u16 *id, unsigned char *s, 970 unsigned int ofs, unsigned int len); 971 extern void ata_id_c_string(const u16 *id, unsigned char *s, 972 unsigned int ofs, unsigned int len); 973 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 974 struct ata_taskfile *tf, u16 *id); 975 extern void ata_qc_complete(struct ata_queued_cmd *qc); 976 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 977 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 978 void (*done)(struct scsi_cmnd *)); 979 extern int ata_std_bios_param(struct scsi_device *sdev, 980 struct block_device *bdev, 981 sector_t capacity, int geom[]); 982 extern int ata_scsi_slave_config(struct scsi_device *sdev); 983 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 984 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 985 int queue_depth); 986 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 987 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 988 989 extern int ata_cable_40wire(struct ata_port *ap); 990 extern int ata_cable_80wire(struct ata_port *ap); 991 extern int ata_cable_sata(struct ata_port *ap); 992 extern int ata_cable_ignore(struct ata_port *ap); 993 extern int ata_cable_unknown(struct ata_port *ap); 994 995 /* Timing helpers */ 996 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 997 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 998 extern int ata_timing_compute(struct ata_device *, unsigned short, 999 struct ata_timing *, int, int); 1000 extern void ata_timing_merge(const struct ata_timing *, 1001 const struct ata_timing *, struct ata_timing *, 1002 unsigned int); 1003 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1004 1005 /* PCI */ 1006 #ifdef CONFIG_PCI 1007 struct pci_dev; 1008 1009 struct pci_bits { 1010 unsigned int reg; /* PCI config register to read */ 1011 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1012 unsigned long mask; 1013 unsigned long val; 1014 }; 1015 1016 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1017 extern void ata_pci_remove_one(struct pci_dev *pdev); 1018 1019 #ifdef CONFIG_PM 1020 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1021 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1022 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1023 extern int ata_pci_device_resume(struct pci_dev *pdev); 1024 #endif /* CONFIG_PM */ 1025 #endif /* CONFIG_PCI */ 1026 1027 /* 1028 * ACPI - drivers/ata/libata-acpi.c 1029 */ 1030 #ifdef CONFIG_ATA_ACPI 1031 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1032 { 1033 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1034 return &ap->__acpi_init_gtm; 1035 return NULL; 1036 } 1037 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1038 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1039 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1040 const struct ata_acpi_gtm *gtm); 1041 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1042 #else 1043 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1044 { 1045 return NULL; 1046 } 1047 1048 static inline int ata_acpi_stm(const struct ata_port *ap, 1049 struct ata_acpi_gtm *stm) 1050 { 1051 return -ENOSYS; 1052 } 1053 1054 static inline int ata_acpi_gtm(const struct ata_port *ap, 1055 struct ata_acpi_gtm *stm) 1056 { 1057 return -ENOSYS; 1058 } 1059 1060 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1061 const struct ata_acpi_gtm *gtm) 1062 { 1063 return 0; 1064 } 1065 1066 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1067 const struct ata_acpi_gtm *gtm) 1068 { 1069 return 0; 1070 } 1071 #endif 1072 1073 /* 1074 * EH - drivers/ata/libata-eh.c 1075 */ 1076 extern void ata_port_schedule_eh(struct ata_port *ap); 1077 extern int ata_link_abort(struct ata_link *link); 1078 extern int ata_port_abort(struct ata_port *ap); 1079 extern int ata_port_freeze(struct ata_port *ap); 1080 extern int sata_async_notification(struct ata_port *ap); 1081 1082 extern void ata_eh_freeze_port(struct ata_port *ap); 1083 extern void ata_eh_thaw_port(struct ata_port *ap); 1084 1085 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1086 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1087 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1088 1089 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1090 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1091 ata_postreset_fn_t postreset); 1092 extern void ata_std_error_handler(struct ata_port *ap); 1093 1094 /* 1095 * Base operations to inherit from and initializers for sht 1096 * 1097 * Operations 1098 * 1099 * base : Common to all libata drivers. 1100 * sata : SATA controllers w/ native interface. 1101 * pmp : SATA controllers w/ PMP support. 1102 * sff : SFF ATA controllers w/o BMDMA support. 1103 * bmdma : SFF ATA controllers w/ BMDMA support. 1104 * 1105 * sht initializers 1106 * 1107 * BASE : Common to all libata drivers. The user must set 1108 * sg_tablesize and dma_boundary. 1109 * PIO : SFF ATA controllers w/ only PIO support. 1110 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1111 * dma_boundary are set to BMDMA limits. 1112 * NCQ : SATA controllers supporting NCQ. The user must set 1113 * sg_tablesize, dma_boundary and can_queue. 1114 */ 1115 extern const struct ata_port_operations ata_base_port_ops; 1116 extern const struct ata_port_operations sata_port_ops; 1117 extern struct device_attribute *ata_common_sdev_attrs[]; 1118 1119 #define ATA_BASE_SHT(drv_name) \ 1120 .module = THIS_MODULE, \ 1121 .name = drv_name, \ 1122 .ioctl = ata_scsi_ioctl, \ 1123 .queuecommand = ata_scsi_queuecmd, \ 1124 .can_queue = ATA_DEF_QUEUE, \ 1125 .this_id = ATA_SHT_THIS_ID, \ 1126 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1127 .emulated = ATA_SHT_EMULATED, \ 1128 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1129 .proc_name = drv_name, \ 1130 .slave_configure = ata_scsi_slave_config, \ 1131 .slave_destroy = ata_scsi_slave_destroy, \ 1132 .bios_param = ata_std_bios_param, \ 1133 .sdev_attrs = ata_common_sdev_attrs 1134 1135 #define ATA_NCQ_SHT(drv_name) \ 1136 ATA_BASE_SHT(drv_name), \ 1137 .change_queue_depth = ata_scsi_change_queue_depth 1138 1139 /* 1140 * PMP helpers 1141 */ 1142 #ifdef CONFIG_SATA_PMP 1143 static inline bool sata_pmp_supported(struct ata_port *ap) 1144 { 1145 return ap->flags & ATA_FLAG_PMP; 1146 } 1147 1148 static inline bool sata_pmp_attached(struct ata_port *ap) 1149 { 1150 return ap->nr_pmp_links != 0; 1151 } 1152 1153 static inline int ata_is_host_link(const struct ata_link *link) 1154 { 1155 return link == &link->ap->link || link == link->ap->slave_link; 1156 } 1157 #else /* CONFIG_SATA_PMP */ 1158 static inline bool sata_pmp_supported(struct ata_port *ap) 1159 { 1160 return false; 1161 } 1162 1163 static inline bool sata_pmp_attached(struct ata_port *ap) 1164 { 1165 return false; 1166 } 1167 1168 static inline int ata_is_host_link(const struct ata_link *link) 1169 { 1170 return 1; 1171 } 1172 #endif /* CONFIG_SATA_PMP */ 1173 1174 static inline int sata_srst_pmp(struct ata_link *link) 1175 { 1176 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1177 return SATA_PMP_CTRL_PORT; 1178 return link->pmp; 1179 } 1180 1181 /* 1182 * printk helpers 1183 */ 1184 #define ata_port_printk(ap, lv, fmt, args...) \ 1185 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1186 1187 #define ata_link_printk(link, lv, fmt, args...) do { \ 1188 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1189 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1190 (link)->pmp , ##args); \ 1191 else \ 1192 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1193 } while(0) 1194 1195 #define ata_dev_printk(dev, lv, fmt, args...) \ 1196 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1197 (dev)->link->pmp + (dev)->devno , ##args) 1198 1199 /* 1200 * ata_eh_info helpers 1201 */ 1202 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1203 __attribute__ ((format (printf, 2, 3))); 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_clear_desc(struct ata_eh_info *ehi); 1207 1208 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1209 { 1210 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1211 ehi->flags |= ATA_EHI_HOTPLUGGED; 1212 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1213 ehi->err_mask |= AC_ERR_ATA_BUS; 1214 } 1215 1216 /* 1217 * port description helpers 1218 */ 1219 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1220 __attribute__ ((format (printf, 2, 3))); 1221 #ifdef CONFIG_PCI 1222 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1223 const char *name); 1224 #endif 1225 1226 static inline unsigned int ata_tag_valid(unsigned int tag) 1227 { 1228 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1229 } 1230 1231 static inline unsigned int ata_tag_internal(unsigned int tag) 1232 { 1233 return tag == ATA_TAG_INTERNAL; 1234 } 1235 1236 /* 1237 * device helpers 1238 */ 1239 static inline unsigned int ata_class_enabled(unsigned int class) 1240 { 1241 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1242 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1243 } 1244 1245 static inline unsigned int ata_class_disabled(unsigned int class) 1246 { 1247 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1248 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1249 } 1250 1251 static inline unsigned int ata_class_absent(unsigned int class) 1252 { 1253 return !ata_class_enabled(class) && !ata_class_disabled(class); 1254 } 1255 1256 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1257 { 1258 return ata_class_enabled(dev->class); 1259 } 1260 1261 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1262 { 1263 return ata_class_disabled(dev->class); 1264 } 1265 1266 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1267 { 1268 return ata_class_absent(dev->class); 1269 } 1270 1271 /* 1272 * link helpers 1273 */ 1274 static inline int ata_link_max_devices(const struct ata_link *link) 1275 { 1276 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1277 return 2; 1278 return 1; 1279 } 1280 1281 static inline int ata_link_active(struct ata_link *link) 1282 { 1283 return ata_tag_valid(link->active_tag) || link->sactive; 1284 } 1285 1286 extern struct ata_link *__ata_port_next_link(struct ata_port *ap, 1287 struct ata_link *link, 1288 bool dev_only); 1289 1290 #define __ata_port_for_each_link(link, ap) \ 1291 for ((link) = __ata_port_next_link((ap), NULL, false); (link); \ 1292 (link) = __ata_port_next_link((ap), (link), false)) 1293 1294 #define ata_port_for_each_link(link, ap) \ 1295 for ((link) = __ata_port_next_link((ap), NULL, true); (link); \ 1296 (link) = __ata_port_next_link((ap), (link), true)) 1297 1298 #define ata_link_for_each_dev(dev, link) \ 1299 for ((dev) = (link)->device; \ 1300 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \ 1301 (dev)++) 1302 1303 #define ata_link_for_each_dev_reverse(dev, link) \ 1304 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \ 1305 (dev) >= (link)->device || ((dev) = NULL); (dev)--) 1306 1307 /** 1308 * ata_ncq_enabled - Test whether NCQ is enabled 1309 * @dev: ATA device to test for 1310 * 1311 * LOCKING: 1312 * spin_lock_irqsave(host lock) 1313 * 1314 * RETURNS: 1315 * 1 if NCQ is enabled for @dev, 0 otherwise. 1316 */ 1317 static inline int ata_ncq_enabled(struct ata_device *dev) 1318 { 1319 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1320 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1321 } 1322 1323 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1324 { 1325 qc->tf.ctl |= ATA_NIEN; 1326 } 1327 1328 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1329 unsigned int tag) 1330 { 1331 if (likely(ata_tag_valid(tag))) 1332 return &ap->qcmd[tag]; 1333 return NULL; 1334 } 1335 1336 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1337 unsigned int tag) 1338 { 1339 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1340 1341 if (unlikely(!qc) || !ap->ops->error_handler) 1342 return qc; 1343 1344 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1345 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1346 return qc; 1347 1348 return NULL; 1349 } 1350 1351 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1352 { 1353 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1354 } 1355 1356 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1357 { 1358 memset(tf, 0, sizeof(*tf)); 1359 1360 tf->ctl = dev->link->ap->ctl; 1361 if (dev->devno == 0) 1362 tf->device = ATA_DEVICE_OBS; 1363 else 1364 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1365 } 1366 1367 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1368 { 1369 qc->dma_dir = DMA_NONE; 1370 qc->sg = NULL; 1371 qc->flags = 0; 1372 qc->cursg = NULL; 1373 qc->cursg_ofs = 0; 1374 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1375 qc->n_elem = 0; 1376 qc->err_mask = 0; 1377 qc->sect_size = ATA_SECT_SIZE; 1378 1379 ata_tf_init(qc->dev, &qc->tf); 1380 1381 /* init result_tf such that it indicates normal completion */ 1382 qc->result_tf.command = ATA_DRDY; 1383 qc->result_tf.feature = 0; 1384 } 1385 1386 static inline int ata_try_flush_cache(const struct ata_device *dev) 1387 { 1388 return ata_id_wcache_enabled(dev->id) || 1389 ata_id_has_flush(dev->id) || 1390 ata_id_has_flush_ext(dev->id); 1391 } 1392 1393 static inline unsigned int ac_err_mask(u8 status) 1394 { 1395 if (status & (ATA_BUSY | ATA_DRQ)) 1396 return AC_ERR_HSM; 1397 if (status & (ATA_ERR | ATA_DF)) 1398 return AC_ERR_DEV; 1399 return 0; 1400 } 1401 1402 static inline unsigned int __ac_err_mask(u8 status) 1403 { 1404 unsigned int mask = ac_err_mask(status); 1405 if (mask == 0) 1406 return AC_ERR_OTHER; 1407 return mask; 1408 } 1409 1410 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1411 { 1412 return *(struct ata_port **)&host->hostdata[0]; 1413 } 1414 1415 static inline int ata_check_ready(u8 status) 1416 { 1417 if (!(status & ATA_BUSY)) 1418 return 1; 1419 1420 /* 0xff indicates either no device or device not ready */ 1421 if (status == 0xff) 1422 return -ENODEV; 1423 1424 return 0; 1425 } 1426 1427 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1428 unsigned long timeout_msecs) 1429 { 1430 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1431 } 1432 1433 /* Don't open code these in drivers as there are traps. Firstly the range may 1434 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1435 > UDMA_0. Dyma ddreigiau */ 1436 1437 static inline int ata_using_mwdma(struct ata_device *adev) 1438 { 1439 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1440 return 1; 1441 return 0; 1442 } 1443 1444 static inline int ata_using_udma(struct ata_device *adev) 1445 { 1446 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1447 return 1; 1448 return 0; 1449 } 1450 1451 static inline int ata_dma_enabled(struct ata_device *adev) 1452 { 1453 return (adev->dma_mode == 0xFF ? 0 : 1); 1454 } 1455 1456 /************************************************************************** 1457 * PMP - drivers/ata/libata-pmp.c 1458 */ 1459 #ifdef CONFIG_SATA_PMP 1460 1461 extern const struct ata_port_operations sata_pmp_port_ops; 1462 1463 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1464 extern void sata_pmp_error_handler(struct ata_port *ap); 1465 1466 #else /* CONFIG_SATA_PMP */ 1467 1468 #define sata_pmp_port_ops sata_port_ops 1469 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1470 #define sata_pmp_error_handler ata_std_error_handler 1471 1472 #endif /* CONFIG_SATA_PMP */ 1473 1474 1475 /************************************************************************** 1476 * SFF - drivers/ata/libata-sff.c 1477 */ 1478 #ifdef CONFIG_ATA_SFF 1479 1480 extern const struct ata_port_operations ata_sff_port_ops; 1481 extern const struct ata_port_operations ata_bmdma_port_ops; 1482 1483 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1484 #define ATA_PIO_SHT(drv_name) \ 1485 ATA_BASE_SHT(drv_name), \ 1486 .sg_tablesize = LIBATA_MAX_PRD, \ 1487 .dma_boundary = ATA_DMA_BOUNDARY 1488 1489 #define ATA_BMDMA_SHT(drv_name) \ 1490 ATA_BASE_SHT(drv_name), \ 1491 .sg_tablesize = LIBATA_MAX_PRD, \ 1492 .dma_boundary = ATA_DMA_BOUNDARY 1493 1494 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc); 1495 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc); 1496 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1497 extern u8 ata_sff_check_status(struct ata_port *ap); 1498 extern void ata_sff_pause(struct ata_port *ap); 1499 extern void ata_sff_dma_pause(struct ata_port *ap); 1500 extern int ata_sff_busy_sleep(struct ata_port *ap, 1501 unsigned long timeout_pat, unsigned long timeout); 1502 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1503 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1504 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1505 extern void ata_sff_exec_command(struct ata_port *ap, 1506 const struct ata_taskfile *tf); 1507 extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1508 unsigned char *buf, unsigned int buflen, int rw); 1509 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1510 unsigned char *buf, unsigned int buflen, int rw); 1511 extern u8 ata_sff_irq_on(struct ata_port *ap); 1512 extern void ata_sff_irq_clear(struct ata_port *ap); 1513 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1514 u8 status, int in_wq); 1515 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1516 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1517 extern unsigned int ata_sff_host_intr(struct ata_port *ap, 1518 struct ata_queued_cmd *qc); 1519 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1520 extern void ata_sff_freeze(struct ata_port *ap); 1521 extern void ata_sff_thaw(struct ata_port *ap); 1522 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1523 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1524 u8 *r_err); 1525 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1526 unsigned long deadline); 1527 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1528 unsigned long deadline); 1529 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1530 unsigned long deadline); 1531 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1532 extern void ata_sff_error_handler(struct ata_port *ap); 1533 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc); 1534 extern int ata_sff_port_start(struct ata_port *ap); 1535 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1536 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev, 1537 unsigned long xfer_mask); 1538 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1539 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1540 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1541 extern u8 ata_bmdma_status(struct ata_port *ap); 1542 extern void ata_bus_reset(struct ata_port *ap); 1543 1544 #ifdef CONFIG_PCI 1545 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1546 extern int ata_pci_bmdma_init(struct ata_host *host); 1547 extern int ata_pci_sff_init_host(struct ata_host *host); 1548 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1549 const struct ata_port_info * const * ppi, 1550 struct ata_host **r_host); 1551 extern int ata_pci_sff_activate_host(struct ata_host *host, 1552 irq_handler_t irq_handler, 1553 struct scsi_host_template *sht); 1554 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1555 const struct ata_port_info * const * ppi, 1556 struct scsi_host_template *sht, void *host_priv); 1557 #endif /* CONFIG_PCI */ 1558 1559 /** 1560 * ata_sff_busy_wait - Wait for a port status register 1561 * @ap: Port to wait for. 1562 * @bits: bits that must be clear 1563 * @max: number of 10uS waits to perform 1564 * 1565 * Waits up to max*10 microseconds for the selected bits in the port's 1566 * status register to be cleared. 1567 * Returns final value of status register. 1568 * 1569 * LOCKING: 1570 * Inherited from caller. 1571 */ 1572 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1573 unsigned int max) 1574 { 1575 u8 status; 1576 1577 do { 1578 udelay(10); 1579 status = ap->ops->sff_check_status(ap); 1580 max--; 1581 } while (status != 0xff && (status & bits) && (max > 0)); 1582 1583 return status; 1584 } 1585 1586 /** 1587 * ata_wait_idle - Wait for a port to be idle. 1588 * @ap: Port to wait for. 1589 * 1590 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1591 * Returns final value of status register. 1592 * 1593 * LOCKING: 1594 * Inherited from caller. 1595 */ 1596 static inline u8 ata_wait_idle(struct ata_port *ap) 1597 { 1598 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1599 1600 #ifdef ATA_DEBUG 1601 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1602 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1603 status); 1604 #endif 1605 1606 return status; 1607 } 1608 #endif /* CONFIG_ATA_SFF */ 1609 1610 #endif /* __LINUX_LIBATA_H__ */ 1611