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