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