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_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ 191 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ 192 ATA_FLAG_DEBUGMSG = (1 << 13), 193 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 194 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 195 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 196 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 197 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 198 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */ 199 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 200 * management */ 201 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 202 * led */ 203 204 /* The following flag belongs to ap->pflags but is kept in 205 * ap->flags because it's referenced in many LLDs and will be 206 * removed in not-too-distant future. 207 */ 208 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 209 210 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 211 212 /* struct ata_port pflags */ 213 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 214 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 215 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 216 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 217 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 218 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 219 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 220 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 221 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 222 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 223 224 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 225 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 226 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 227 228 /* struct ata_queued_cmd flags */ 229 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 230 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 231 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 232 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 233 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 234 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 235 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 236 237 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 238 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 239 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 240 241 /* host set flags */ 242 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 243 ATA_HOST_STARTED = (1 << 1), /* Host started */ 244 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 245 246 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 247 248 /* various lengths of time */ 249 ATA_TMOUT_BOOT = 30000, /* heuristic */ 250 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 251 ATA_TMOUT_INTERNAL_QUICK = 5000, 252 ATA_TMOUT_MAX_PARK = 30000, 253 254 /* FIXME: GoVault needs 2s but we can't afford that without 255 * parallel probing. 800ms is enough for iVDR disk 256 * HHD424020F7SV00. Increase to 2secs when parallel probing 257 * is in place. 258 */ 259 ATA_TMOUT_FF_WAIT = 800, 260 261 /* Spec mandates to wait for ">= 2ms" before checking status 262 * after reset. We wait 150ms, because that was the magic 263 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 264 * the period of time between when the ATA command register is 265 * written, and then status is checked. Because waiting for 266 * "a while" before checking status is fine, post SRST, we 267 * perform this magic delay here as well. 268 * 269 * Old drivers/ide uses the 2mS rule and then waits for ready. 270 */ 271 ATA_WAIT_AFTER_RESET = 150, 272 273 /* If PMP is supported, we have to do follow-up SRST. As some 274 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 275 * advised to wait only for the following duration before 276 * doing SRST. 277 */ 278 ATA_TMOUT_PMP_SRST_WAIT = 5000, 279 280 /* ATA bus states */ 281 BUS_UNKNOWN = 0, 282 BUS_DMA = 1, 283 BUS_IDLE = 2, 284 BUS_NOINTR = 3, 285 BUS_NODATA = 4, 286 BUS_TIMER = 5, 287 BUS_PIO = 6, 288 BUS_EDD = 7, 289 BUS_IDENTIFY = 8, 290 BUS_PACKET = 9, 291 292 /* SATA port states */ 293 PORT_UNKNOWN = 0, 294 PORT_ENABLED = 1, 295 PORT_DISABLED = 2, 296 297 /* encoding various smaller bitmaps into a single 298 * unsigned long bitmap 299 */ 300 ATA_NR_PIO_MODES = 7, 301 ATA_NR_MWDMA_MODES = 5, 302 ATA_NR_UDMA_MODES = 8, 303 304 ATA_SHIFT_PIO = 0, 305 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 306 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 307 308 /* size of buffer to pad xfers ending on unaligned boundaries */ 309 ATA_DMA_PAD_SZ = 4, 310 311 /* ering size */ 312 ATA_ERING_SIZE = 32, 313 314 /* return values for ->qc_defer */ 315 ATA_DEFER_LINK = 1, 316 ATA_DEFER_PORT = 2, 317 318 /* desc_len for ata_eh_info and context */ 319 ATA_EH_DESC_LEN = 80, 320 321 /* reset / recovery action types */ 322 ATA_EH_REVALIDATE = (1 << 0), 323 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 324 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 325 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 326 ATA_EH_ENABLE_LINK = (1 << 3), 327 ATA_EH_LPM = (1 << 4), /* link power management action */ 328 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 329 330 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 331 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 332 ATA_EH_ENABLE_LINK | ATA_EH_LPM, 333 334 /* ata_eh_info->flags */ 335 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 336 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 337 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 338 339 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 340 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 341 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 342 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 343 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 344 345 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 346 347 /* mask of flags to transfer *to* the slave link */ 348 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 349 350 /* max tries if error condition is still set after ->error_handler */ 351 ATA_EH_MAX_TRIES = 5, 352 353 /* how hard are we gonna try to probe/recover devices */ 354 ATA_PROBE_MAX_TRIES = 3, 355 ATA_EH_DEV_TRIES = 3, 356 ATA_EH_PMP_TRIES = 5, 357 ATA_EH_PMP_LINK_TRIES = 3, 358 359 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 360 361 /* This should match the actual table size of 362 * ata_eh_cmd_timeout_table in libata-eh.c. 363 */ 364 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5, 365 366 /* Horkage types. May be set by libata or controller on drives 367 (some horkage may be drive/controller pair dependant */ 368 369 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 370 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 371 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 372 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 373 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 374 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 375 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 376 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */ 377 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 378 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 379 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 380 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 381 not multiple of 16 bytes */ 382 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firwmare update warning */ 383 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 384 385 /* DMA mask for user DMA control: User visible values; DO NOT 386 renumber */ 387 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 388 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 389 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 390 391 /* ATAPI command types */ 392 ATAPI_READ = 0, /* READs */ 393 ATAPI_WRITE = 1, /* WRITEs */ 394 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 395 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 396 ATAPI_MISC = 4, /* the rest */ 397 398 /* Timing constants */ 399 ATA_TIMING_SETUP = (1 << 0), 400 ATA_TIMING_ACT8B = (1 << 1), 401 ATA_TIMING_REC8B = (1 << 2), 402 ATA_TIMING_CYC8B = (1 << 3), 403 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 404 ATA_TIMING_CYC8B, 405 ATA_TIMING_ACTIVE = (1 << 4), 406 ATA_TIMING_RECOVER = (1 << 5), 407 ATA_TIMING_DMACK_HOLD = (1 << 6), 408 ATA_TIMING_CYCLE = (1 << 7), 409 ATA_TIMING_UDMA = (1 << 8), 410 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 411 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 412 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 413 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 414 ATA_TIMING_UDMA, 415 }; 416 417 enum ata_xfer_mask { 418 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 419 << ATA_SHIFT_PIO, 420 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 421 << ATA_SHIFT_MWDMA, 422 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 423 << ATA_SHIFT_UDMA, 424 }; 425 426 enum hsm_task_states { 427 HSM_ST_IDLE, /* no command on going */ 428 HSM_ST_FIRST, /* (waiting the device to) 429 write CDB or first data block */ 430 HSM_ST, /* (waiting the device to) transfer data */ 431 HSM_ST_LAST, /* (waiting the device to) complete command */ 432 HSM_ST_ERR, /* error */ 433 }; 434 435 enum ata_completion_errors { 436 AC_ERR_DEV = (1 << 0), /* device reported error */ 437 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 438 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 439 AC_ERR_MEDIA = (1 << 3), /* media error */ 440 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 441 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 442 AC_ERR_SYSTEM = (1 << 6), /* system error */ 443 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 444 AC_ERR_OTHER = (1 << 8), /* unknown */ 445 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 446 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 447 }; 448 449 /* forward declarations */ 450 struct scsi_device; 451 struct ata_port_operations; 452 struct ata_port; 453 struct ata_link; 454 struct ata_queued_cmd; 455 456 /* typedefs */ 457 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 458 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 459 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 460 unsigned long deadline); 461 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 462 463 /* 464 * host pm policy: If you alter this, you also need to alter libata-scsi.c 465 * (for the ascii descriptions) 466 */ 467 enum link_pm { 468 NOT_AVAILABLE, 469 MIN_POWER, 470 MAX_PERFORMANCE, 471 MEDIUM_POWER, 472 }; 473 extern struct device_attribute dev_attr_link_power_management_policy; 474 extern struct device_attribute dev_attr_unload_heads; 475 extern struct device_attribute dev_attr_em_message_type; 476 extern struct device_attribute dev_attr_em_message; 477 extern struct device_attribute dev_attr_sw_activity; 478 479 enum sw_activity { 480 OFF, 481 BLINK_ON, 482 BLINK_OFF, 483 }; 484 485 #ifdef CONFIG_ATA_SFF 486 struct ata_ioports { 487 void __iomem *cmd_addr; 488 void __iomem *data_addr; 489 void __iomem *error_addr; 490 void __iomem *feature_addr; 491 void __iomem *nsect_addr; 492 void __iomem *lbal_addr; 493 void __iomem *lbam_addr; 494 void __iomem *lbah_addr; 495 void __iomem *device_addr; 496 void __iomem *status_addr; 497 void __iomem *command_addr; 498 void __iomem *altstatus_addr; 499 void __iomem *ctl_addr; 500 void __iomem *bmdma_addr; 501 void __iomem *scr_addr; 502 }; 503 #endif /* CONFIG_ATA_SFF */ 504 505 struct ata_host { 506 spinlock_t lock; 507 struct device *dev; 508 void __iomem * const *iomap; 509 unsigned int n_ports; 510 void *private_data; 511 struct ata_port_operations *ops; 512 unsigned long flags; 513 #ifdef CONFIG_ATA_ACPI 514 acpi_handle acpi_handle; 515 #endif 516 struct ata_port *simplex_claimed; /* channel owning the DMA */ 517 struct ata_port *ports[0]; 518 }; 519 520 struct ata_queued_cmd { 521 struct ata_port *ap; 522 struct ata_device *dev; 523 524 struct scsi_cmnd *scsicmd; 525 void (*scsidone)(struct scsi_cmnd *); 526 527 struct ata_taskfile tf; 528 u8 cdb[ATAPI_CDB_LEN]; 529 530 unsigned long flags; /* ATA_QCFLAG_xxx */ 531 unsigned int tag; 532 unsigned int n_elem; 533 unsigned int orig_n_elem; 534 535 int dma_dir; 536 537 unsigned int sect_size; 538 539 unsigned int nbytes; 540 unsigned int extrabytes; 541 unsigned int curbytes; 542 543 struct scatterlist *cursg; 544 unsigned int cursg_ofs; 545 546 struct scatterlist sgent; 547 548 struct scatterlist *sg; 549 550 unsigned int err_mask; 551 struct ata_taskfile result_tf; 552 ata_qc_cb_t complete_fn; 553 554 void *private_data; 555 void *lldd_task; 556 }; 557 558 struct ata_port_stats { 559 unsigned long unhandled_irq; 560 unsigned long idle_irq; 561 unsigned long rw_reqbuf; 562 }; 563 564 struct ata_ering_entry { 565 unsigned int eflags; 566 unsigned int err_mask; 567 u64 timestamp; 568 }; 569 570 struct ata_ering { 571 int cursor; 572 struct ata_ering_entry ring[ATA_ERING_SIZE]; 573 }; 574 575 struct ata_device { 576 struct ata_link *link; 577 unsigned int devno; /* 0 or 1 */ 578 unsigned int horkage; /* List of broken features */ 579 unsigned long flags; /* ATA_DFLAG_xxx */ 580 struct scsi_device *sdev; /* attached SCSI device */ 581 #ifdef CONFIG_ATA_ACPI 582 acpi_handle acpi_handle; 583 union acpi_object *gtf_cache; 584 #endif 585 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 586 u64 n_sectors; /* size of device, if ATA */ 587 unsigned int class; /* ATA_DEV_xxx */ 588 unsigned long unpark_deadline; 589 590 u8 pio_mode; 591 u8 dma_mode; 592 u8 xfer_mode; 593 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 594 595 unsigned int multi_count; /* sectors count for 596 READ/WRITE MULTIPLE */ 597 unsigned int max_sectors; /* per-device max sectors */ 598 unsigned int cdb_len; 599 600 /* per-dev xfer mask */ 601 unsigned long pio_mask; 602 unsigned long mwdma_mask; 603 unsigned long udma_mask; 604 605 /* for CHS addressing */ 606 u16 cylinders; /* Number of cylinders */ 607 u16 heads; /* Number of heads */ 608 u16 sectors; /* Number of sectors per track */ 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 /* error history */ 616 int spdn_cnt; 617 /* ering is CLEAR_END, read comment above CLEAR_END */ 618 struct ata_ering ering; 619 }; 620 621 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 622 * cleared to zero on ata_dev_init(). 623 */ 624 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 625 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 626 627 struct ata_eh_info { 628 struct ata_device *dev; /* offending device */ 629 u32 serror; /* SError from LLDD */ 630 unsigned int err_mask; /* port-wide err_mask */ 631 unsigned int action; /* ATA_EH_* action mask */ 632 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 633 unsigned int flags; /* ATA_EHI_* flags */ 634 635 unsigned int probe_mask; 636 637 char desc[ATA_EH_DESC_LEN]; 638 int desc_len; 639 }; 640 641 struct ata_eh_context { 642 struct ata_eh_info i; 643 int tries[ATA_MAX_DEVICES]; 644 int cmd_timeout_idx[ATA_MAX_DEVICES] 645 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 646 unsigned int classes[ATA_MAX_DEVICES]; 647 unsigned int did_probe_mask; 648 unsigned int unloaded_mask; 649 unsigned int saved_ncq_enabled; 650 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 651 /* timestamp for the last reset attempt or success */ 652 unsigned long last_reset; 653 }; 654 655 struct ata_acpi_drive 656 { 657 u32 pio; 658 u32 dma; 659 } __packed; 660 661 struct ata_acpi_gtm { 662 struct ata_acpi_drive drive[2]; 663 u32 flags; 664 } __packed; 665 666 struct ata_link { 667 struct ata_port *ap; 668 int pmp; /* port multiplier port # */ 669 670 unsigned int active_tag; /* active tag on this link */ 671 u32 sactive; /* active NCQ commands */ 672 673 unsigned int flags; /* ATA_LFLAG_xxx */ 674 675 u32 saved_scontrol; /* SControl on probe */ 676 unsigned int hw_sata_spd_limit; 677 unsigned int sata_spd_limit; 678 unsigned int sata_spd; /* current SATA PHY speed */ 679 680 /* record runtime error info, protected by host_set lock */ 681 struct ata_eh_info eh_info; 682 /* EH context */ 683 struct ata_eh_context eh_context; 684 685 struct ata_device device[ATA_MAX_DEVICES]; 686 }; 687 688 struct ata_port { 689 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 690 struct ata_port_operations *ops; 691 spinlock_t *lock; 692 unsigned long flags; /* ATA_FLAG_xxx */ 693 unsigned int pflags; /* ATA_PFLAG_xxx */ 694 unsigned int print_id; /* user visible unique port ID */ 695 unsigned int port_no; /* 0 based port no. inside the host */ 696 697 struct ata_prd *prd; /* our SG list */ 698 dma_addr_t prd_dma; /* and its DMA mapping */ 699 700 #ifdef CONFIG_ATA_SFF 701 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 702 #endif /* CONFIG_ATA_SFF */ 703 704 u8 ctl; /* cache of ATA control register */ 705 u8 last_ctl; /* Cache last written value */ 706 unsigned int pio_mask; 707 unsigned int mwdma_mask; 708 unsigned int udma_mask; 709 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 710 711 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 712 unsigned long qc_allocated; 713 unsigned int qc_active; 714 int nr_active_links; /* #links with active qcs */ 715 716 struct ata_link link; /* host default link */ 717 struct ata_link *slave_link; /* see ata_slave_link_init() */ 718 719 int nr_pmp_links; /* nr of available PMP links */ 720 struct ata_link *pmp_link; /* array of PMP links */ 721 struct ata_link *excl_link; /* for PMP qc exclusion */ 722 723 struct ata_port_stats stats; 724 struct ata_host *host; 725 struct device *dev; 726 727 void *port_task_data; 728 struct delayed_work port_task; 729 struct delayed_work hotplug_task; 730 struct work_struct scsi_rescan_task; 731 732 unsigned int hsm_task_state; 733 734 u32 msg_enable; 735 struct list_head eh_done_q; 736 wait_queue_head_t eh_wait_q; 737 int eh_tries; 738 struct completion park_req_pending; 739 740 pm_message_t pm_mesg; 741 int *pm_result; 742 enum link_pm pm_policy; 743 744 struct timer_list fastdrain_timer; 745 unsigned long fastdrain_cnt; 746 747 int em_message_type; 748 void *private_data; 749 750 #ifdef CONFIG_ATA_ACPI 751 acpi_handle acpi_handle; 752 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 753 #endif 754 /* owned by EH */ 755 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 756 }; 757 758 /* The following initializer overrides a method to NULL whether one of 759 * its parent has the method defined or not. This is equivalent to 760 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 761 * expression and thus can't be used as an initializer. 762 */ 763 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 764 765 struct ata_port_operations { 766 /* 767 * Command execution 768 */ 769 int (*qc_defer)(struct ata_queued_cmd *qc); 770 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 771 void (*qc_prep)(struct ata_queued_cmd *qc); 772 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 773 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 774 775 /* 776 * Configuration and exception handling 777 */ 778 int (*cable_detect)(struct ata_port *ap); 779 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 780 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 781 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 782 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 783 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 784 785 void (*dev_config)(struct ata_device *dev); 786 787 void (*freeze)(struct ata_port *ap); 788 void (*thaw)(struct ata_port *ap); 789 ata_prereset_fn_t prereset; 790 ata_reset_fn_t softreset; 791 ata_reset_fn_t hardreset; 792 ata_postreset_fn_t postreset; 793 ata_prereset_fn_t pmp_prereset; 794 ata_reset_fn_t pmp_softreset; 795 ata_reset_fn_t pmp_hardreset; 796 ata_postreset_fn_t pmp_postreset; 797 void (*error_handler)(struct ata_port *ap); 798 void (*lost_interrupt)(struct ata_port *ap); 799 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 800 801 /* 802 * Optional features 803 */ 804 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 805 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 806 void (*pmp_attach)(struct ata_port *ap); 807 void (*pmp_detach)(struct ata_port *ap); 808 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 809 void (*disable_pm)(struct ata_port *ap); 810 811 /* 812 * Start, stop, suspend and resume 813 */ 814 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 815 int (*port_resume)(struct ata_port *ap); 816 int (*port_start)(struct ata_port *ap); 817 void (*port_stop)(struct ata_port *ap); 818 void (*host_stop)(struct ata_host *host); 819 820 #ifdef CONFIG_ATA_SFF 821 /* 822 * SFF / taskfile oriented ops 823 */ 824 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 825 u8 (*sff_check_status)(struct ata_port *ap); 826 u8 (*sff_check_altstatus)(struct ata_port *ap); 827 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 828 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 829 void (*sff_exec_command)(struct ata_port *ap, 830 const struct ata_taskfile *tf); 831 unsigned int (*sff_data_xfer)(struct ata_device *dev, 832 unsigned char *buf, unsigned int buflen, int rw); 833 u8 (*sff_irq_on)(struct ata_port *); 834 void (*sff_irq_clear)(struct ata_port *); 835 836 void (*bmdma_setup)(struct ata_queued_cmd *qc); 837 void (*bmdma_start)(struct ata_queued_cmd *qc); 838 void (*bmdma_stop)(struct ata_queued_cmd *qc); 839 u8 (*bmdma_status)(struct ata_port *ap); 840 841 void (*drain_fifo)(struct ata_queued_cmd *qc); 842 #endif /* CONFIG_ATA_SFF */ 843 844 ssize_t (*em_show)(struct ata_port *ap, char *buf); 845 ssize_t (*em_store)(struct ata_port *ap, const char *message, 846 size_t size); 847 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 848 ssize_t (*sw_activity_store)(struct ata_device *dev, 849 enum sw_activity val); 850 /* 851 * Obsolete 852 */ 853 void (*phy_reset)(struct ata_port *ap); 854 void (*eng_timeout)(struct ata_port *ap); 855 856 /* 857 * ->inherits must be the last field and all the preceding 858 * fields must be pointers. 859 */ 860 const struct ata_port_operations *inherits; 861 }; 862 863 struct ata_port_info { 864 unsigned long flags; 865 unsigned long link_flags; 866 unsigned long pio_mask; 867 unsigned long mwdma_mask; 868 unsigned long udma_mask; 869 struct ata_port_operations *port_ops; 870 void *private_data; 871 }; 872 873 struct ata_timing { 874 unsigned short mode; /* ATA mode */ 875 unsigned short setup; /* t1 */ 876 unsigned short act8b; /* t2 for 8-bit I/O */ 877 unsigned short rec8b; /* t2i for 8-bit I/O */ 878 unsigned short cyc8b; /* t0 for 8-bit I/O */ 879 unsigned short active; /* t2 or tD */ 880 unsigned short recover; /* t2i or tK */ 881 unsigned short dmack_hold; /* tj */ 882 unsigned short cycle; /* t0 */ 883 unsigned short udma; /* t2CYCTYP/2 */ 884 }; 885 886 /* 887 * Core layer - drivers/ata/libata-core.c 888 */ 889 extern const unsigned long sata_deb_timing_normal[]; 890 extern const unsigned long sata_deb_timing_hotplug[]; 891 extern const unsigned long sata_deb_timing_long[]; 892 893 extern struct ata_port_operations ata_dummy_port_ops; 894 extern const struct ata_port_info ata_dummy_port_info; 895 896 static inline const unsigned long * 897 sata_ehc_deb_timing(struct ata_eh_context *ehc) 898 { 899 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 900 return sata_deb_timing_hotplug; 901 else 902 return sata_deb_timing_normal; 903 } 904 905 static inline int ata_port_is_dummy(struct ata_port *ap) 906 { 907 return ap->ops == &ata_dummy_port_ops; 908 } 909 910 extern void ata_port_probe(struct ata_port *); 911 extern int sata_set_spd(struct ata_link *link); 912 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 913 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 914 int (*check_ready)(struct ata_link *link)); 915 extern int sata_link_debounce(struct ata_link *link, 916 const unsigned long *params, unsigned long deadline); 917 extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 918 unsigned long deadline); 919 extern int sata_link_hardreset(struct ata_link *link, 920 const unsigned long *timing, unsigned long deadline, 921 bool *online, int (*check_ready)(struct ata_link *)); 922 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 923 unsigned long deadline); 924 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 925 extern void ata_port_disable(struct ata_port *); 926 927 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 928 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 929 const struct ata_port_info * const * ppi, int n_ports); 930 extern int ata_slave_link_init(struct ata_port *ap); 931 extern int ata_host_start(struct ata_host *host); 932 extern int ata_host_register(struct ata_host *host, 933 struct scsi_host_template *sht); 934 extern int ata_host_activate(struct ata_host *host, int irq, 935 irq_handler_t irq_handler, unsigned long irq_flags, 936 struct scsi_host_template *sht); 937 extern void ata_host_detach(struct ata_host *host); 938 extern void ata_host_init(struct ata_host *, struct device *, 939 unsigned long, struct ata_port_operations *); 940 extern int ata_scsi_detect(struct scsi_host_template *sht); 941 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 942 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 943 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 944 int cmd, void __user *arg); 945 extern void ata_sas_port_destroy(struct ata_port *); 946 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 947 struct ata_port_info *, struct Scsi_Host *); 948 extern int ata_sas_port_init(struct ata_port *); 949 extern int ata_sas_port_start(struct ata_port *ap); 950 extern void ata_sas_port_stop(struct ata_port *ap); 951 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 952 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 953 struct ata_port *ap); 954 extern int sata_scr_valid(struct ata_link *link); 955 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 956 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 957 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 958 extern bool ata_link_online(struct ata_link *link); 959 extern bool ata_link_offline(struct ata_link *link); 960 #ifdef CONFIG_PM 961 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 962 extern void ata_host_resume(struct ata_host *host); 963 #endif 964 extern int ata_ratelimit(void); 965 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 966 unsigned long interval, unsigned long timeout); 967 extern int atapi_cmd_type(u8 opcode); 968 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 969 u8 pmp, int is_cmd, u8 *fis); 970 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 971 extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 972 unsigned long mwdma_mask, unsigned long udma_mask); 973 extern void ata_unpack_xfermask(unsigned long xfer_mask, 974 unsigned long *pio_mask, unsigned long *mwdma_mask, 975 unsigned long *udma_mask); 976 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 977 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 978 extern int ata_xfer_mode2shift(unsigned long xfer_mode); 979 extern const char *ata_mode_string(unsigned long xfer_mask); 980 extern unsigned long ata_id_xfermask(const u16 *id); 981 extern int ata_port_start(struct ata_port *ap); 982 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 983 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 984 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 985 unsigned int n_elem); 986 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 987 extern void ata_dev_disable(struct ata_device *adev); 988 extern void ata_id_string(const u16 *id, unsigned char *s, 989 unsigned int ofs, unsigned int len); 990 extern void ata_id_c_string(const u16 *id, unsigned char *s, 991 unsigned int ofs, unsigned int len); 992 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 993 struct ata_taskfile *tf, u16 *id); 994 extern void ata_qc_complete(struct ata_queued_cmd *qc); 995 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 996 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 997 void (*done)(struct scsi_cmnd *)); 998 extern int ata_std_bios_param(struct scsi_device *sdev, 999 struct block_device *bdev, 1000 sector_t capacity, int geom[]); 1001 extern int ata_scsi_slave_config(struct scsi_device *sdev); 1002 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1003 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1004 int queue_depth); 1005 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1006 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1007 1008 extern int ata_cable_40wire(struct ata_port *ap); 1009 extern int ata_cable_80wire(struct ata_port *ap); 1010 extern int ata_cable_sata(struct ata_port *ap); 1011 extern int ata_cable_ignore(struct ata_port *ap); 1012 extern int ata_cable_unknown(struct ata_port *ap); 1013 1014 extern void ata_pio_queue_task(struct ata_port *ap, void *data, 1015 unsigned long delay); 1016 1017 /* Timing helpers */ 1018 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1019 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1020 extern int ata_timing_compute(struct ata_device *, unsigned short, 1021 struct ata_timing *, int, int); 1022 extern void ata_timing_merge(const struct ata_timing *, 1023 const struct ata_timing *, struct ata_timing *, 1024 unsigned int); 1025 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1026 1027 /* PCI */ 1028 #ifdef CONFIG_PCI 1029 struct pci_dev; 1030 1031 struct pci_bits { 1032 unsigned int reg; /* PCI config register to read */ 1033 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1034 unsigned long mask; 1035 unsigned long val; 1036 }; 1037 1038 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1039 extern void ata_pci_remove_one(struct pci_dev *pdev); 1040 1041 #ifdef CONFIG_PM 1042 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1043 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1044 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1045 extern int ata_pci_device_resume(struct pci_dev *pdev); 1046 #endif /* CONFIG_PM */ 1047 #endif /* CONFIG_PCI */ 1048 1049 /* 1050 * ACPI - drivers/ata/libata-acpi.c 1051 */ 1052 #ifdef CONFIG_ATA_ACPI 1053 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1054 { 1055 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1056 return &ap->__acpi_init_gtm; 1057 return NULL; 1058 } 1059 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1060 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1061 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1062 const struct ata_acpi_gtm *gtm); 1063 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1064 #else 1065 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1066 { 1067 return NULL; 1068 } 1069 1070 static inline int ata_acpi_stm(const struct ata_port *ap, 1071 struct ata_acpi_gtm *stm) 1072 { 1073 return -ENOSYS; 1074 } 1075 1076 static inline int ata_acpi_gtm(const struct ata_port *ap, 1077 struct ata_acpi_gtm *stm) 1078 { 1079 return -ENOSYS; 1080 } 1081 1082 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1083 const struct ata_acpi_gtm *gtm) 1084 { 1085 return 0; 1086 } 1087 1088 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1089 const struct ata_acpi_gtm *gtm) 1090 { 1091 return 0; 1092 } 1093 #endif 1094 1095 /* 1096 * EH - drivers/ata/libata-eh.c 1097 */ 1098 extern void ata_port_schedule_eh(struct ata_port *ap); 1099 extern int ata_link_abort(struct ata_link *link); 1100 extern int ata_port_abort(struct ata_port *ap); 1101 extern int ata_port_freeze(struct ata_port *ap); 1102 extern int sata_async_notification(struct ata_port *ap); 1103 1104 extern void ata_eh_freeze_port(struct ata_port *ap); 1105 extern void ata_eh_thaw_port(struct ata_port *ap); 1106 1107 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1108 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1109 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1110 1111 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1112 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1113 ata_postreset_fn_t postreset); 1114 extern void ata_std_error_handler(struct ata_port *ap); 1115 1116 /* 1117 * Base operations to inherit from and initializers for sht 1118 * 1119 * Operations 1120 * 1121 * base : Common to all libata drivers. 1122 * sata : SATA controllers w/ native interface. 1123 * pmp : SATA controllers w/ PMP support. 1124 * sff : SFF ATA controllers w/o BMDMA support. 1125 * bmdma : SFF ATA controllers w/ BMDMA support. 1126 * 1127 * sht initializers 1128 * 1129 * BASE : Common to all libata drivers. The user must set 1130 * sg_tablesize and dma_boundary. 1131 * PIO : SFF ATA controllers w/ only PIO support. 1132 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1133 * dma_boundary are set to BMDMA limits. 1134 * NCQ : SATA controllers supporting NCQ. The user must set 1135 * sg_tablesize, dma_boundary and can_queue. 1136 */ 1137 extern const struct ata_port_operations ata_base_port_ops; 1138 extern const struct ata_port_operations sata_port_ops; 1139 extern struct device_attribute *ata_common_sdev_attrs[]; 1140 1141 #define ATA_BASE_SHT(drv_name) \ 1142 .module = THIS_MODULE, \ 1143 .name = drv_name, \ 1144 .ioctl = ata_scsi_ioctl, \ 1145 .queuecommand = ata_scsi_queuecmd, \ 1146 .can_queue = ATA_DEF_QUEUE, \ 1147 .this_id = ATA_SHT_THIS_ID, \ 1148 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1149 .emulated = ATA_SHT_EMULATED, \ 1150 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1151 .proc_name = drv_name, \ 1152 .slave_configure = ata_scsi_slave_config, \ 1153 .slave_destroy = ata_scsi_slave_destroy, \ 1154 .bios_param = ata_std_bios_param, \ 1155 .sdev_attrs = ata_common_sdev_attrs 1156 1157 #define ATA_NCQ_SHT(drv_name) \ 1158 ATA_BASE_SHT(drv_name), \ 1159 .change_queue_depth = ata_scsi_change_queue_depth 1160 1161 /* 1162 * PMP helpers 1163 */ 1164 #ifdef CONFIG_SATA_PMP 1165 static inline bool sata_pmp_supported(struct ata_port *ap) 1166 { 1167 return ap->flags & ATA_FLAG_PMP; 1168 } 1169 1170 static inline bool sata_pmp_attached(struct ata_port *ap) 1171 { 1172 return ap->nr_pmp_links != 0; 1173 } 1174 1175 static inline int ata_is_host_link(const struct ata_link *link) 1176 { 1177 return link == &link->ap->link || link == link->ap->slave_link; 1178 } 1179 #else /* CONFIG_SATA_PMP */ 1180 static inline bool sata_pmp_supported(struct ata_port *ap) 1181 { 1182 return false; 1183 } 1184 1185 static inline bool sata_pmp_attached(struct ata_port *ap) 1186 { 1187 return false; 1188 } 1189 1190 static inline int ata_is_host_link(const struct ata_link *link) 1191 { 1192 return 1; 1193 } 1194 #endif /* CONFIG_SATA_PMP */ 1195 1196 static inline int sata_srst_pmp(struct ata_link *link) 1197 { 1198 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1199 return SATA_PMP_CTRL_PORT; 1200 return link->pmp; 1201 } 1202 1203 /* 1204 * printk helpers 1205 */ 1206 #define ata_port_printk(ap, lv, fmt, args...) \ 1207 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1208 1209 #define ata_link_printk(link, lv, fmt, args...) do { \ 1210 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1211 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1212 (link)->pmp , ##args); \ 1213 else \ 1214 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1215 } while(0) 1216 1217 #define ata_dev_printk(dev, lv, fmt, args...) \ 1218 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1219 (dev)->link->pmp + (dev)->devno , ##args) 1220 1221 /* 1222 * ata_eh_info helpers 1223 */ 1224 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1225 __attribute__ ((format (printf, 2, 3))); 1226 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1227 __attribute__ ((format (printf, 2, 3))); 1228 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1229 1230 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1231 { 1232 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1233 ehi->flags |= ATA_EHI_HOTPLUGGED; 1234 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1235 ehi->err_mask |= AC_ERR_ATA_BUS; 1236 } 1237 1238 /* 1239 * port description helpers 1240 */ 1241 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1242 __attribute__ ((format (printf, 2, 3))); 1243 #ifdef CONFIG_PCI 1244 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1245 const char *name); 1246 #endif 1247 1248 static inline unsigned int ata_tag_valid(unsigned int tag) 1249 { 1250 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1251 } 1252 1253 static inline unsigned int ata_tag_internal(unsigned int tag) 1254 { 1255 return tag == ATA_TAG_INTERNAL; 1256 } 1257 1258 /* 1259 * device helpers 1260 */ 1261 static inline unsigned int ata_class_enabled(unsigned int class) 1262 { 1263 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1264 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1265 } 1266 1267 static inline unsigned int ata_class_disabled(unsigned int class) 1268 { 1269 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1270 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1271 } 1272 1273 static inline unsigned int ata_class_absent(unsigned int class) 1274 { 1275 return !ata_class_enabled(class) && !ata_class_disabled(class); 1276 } 1277 1278 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1279 { 1280 return ata_class_enabled(dev->class); 1281 } 1282 1283 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1284 { 1285 return ata_class_disabled(dev->class); 1286 } 1287 1288 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1289 { 1290 return ata_class_absent(dev->class); 1291 } 1292 1293 /* 1294 * link helpers 1295 */ 1296 static inline int ata_link_max_devices(const struct ata_link *link) 1297 { 1298 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1299 return 2; 1300 return 1; 1301 } 1302 1303 static inline int ata_link_active(struct ata_link *link) 1304 { 1305 return ata_tag_valid(link->active_tag) || link->sactive; 1306 } 1307 1308 /* 1309 * Iterators 1310 * 1311 * ATA_LITER_* constants are used to select link iteration mode and 1312 * ATA_DITER_* device iteration mode. 1313 * 1314 * For a custom iteration directly using ata_{link|dev}_next(), if 1315 * @link or @dev, respectively, is NULL, the first element is 1316 * returned. @dev and @link can be any valid device or link and the 1317 * next element according to the iteration mode will be returned. 1318 * After the last element, NULL is returned. 1319 */ 1320 enum ata_link_iter_mode { 1321 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1322 * host link. no slave link */ 1323 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1324 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1325 * slave link still comes after host link */ 1326 }; 1327 1328 enum ata_dev_iter_mode { 1329 ATA_DITER_ENABLED, 1330 ATA_DITER_ENABLED_REVERSE, 1331 ATA_DITER_ALL, 1332 ATA_DITER_ALL_REVERSE, 1333 }; 1334 1335 extern struct ata_link *ata_link_next(struct ata_link *link, 1336 struct ata_port *ap, 1337 enum ata_link_iter_mode mode); 1338 1339 extern struct ata_device *ata_dev_next(struct ata_device *dev, 1340 struct ata_link *link, 1341 enum ata_dev_iter_mode mode); 1342 1343 /* 1344 * Shortcut notation for iterations 1345 * 1346 * ata_for_each_link() iterates over each link of @ap according to 1347 * @mode. @link points to the current link in the loop. @link is 1348 * NULL after loop termination. ata_for_each_dev() works the same way 1349 * except that it iterates over each device of @link. 1350 * 1351 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1352 * specified when using the following shorthand notations. Only the 1353 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1354 * specified. This not only increases brevity but also makes it 1355 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1356 */ 1357 #define ata_for_each_link(link, ap, mode) \ 1358 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1359 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1360 1361 #define ata_for_each_dev(dev, link, mode) \ 1362 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1363 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1364 1365 /** 1366 * ata_ncq_enabled - Test whether NCQ is enabled 1367 * @dev: ATA device to test for 1368 * 1369 * LOCKING: 1370 * spin_lock_irqsave(host lock) 1371 * 1372 * RETURNS: 1373 * 1 if NCQ is enabled for @dev, 0 otherwise. 1374 */ 1375 static inline int ata_ncq_enabled(struct ata_device *dev) 1376 { 1377 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1378 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1379 } 1380 1381 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1382 { 1383 qc->tf.ctl |= ATA_NIEN; 1384 } 1385 1386 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1387 unsigned int tag) 1388 { 1389 if (likely(ata_tag_valid(tag))) 1390 return &ap->qcmd[tag]; 1391 return NULL; 1392 } 1393 1394 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1395 unsigned int tag) 1396 { 1397 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1398 1399 if (unlikely(!qc) || !ap->ops->error_handler) 1400 return qc; 1401 1402 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1403 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1404 return qc; 1405 1406 return NULL; 1407 } 1408 1409 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1410 { 1411 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1412 } 1413 1414 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1415 { 1416 memset(tf, 0, sizeof(*tf)); 1417 1418 tf->ctl = dev->link->ap->ctl; 1419 if (dev->devno == 0) 1420 tf->device = ATA_DEVICE_OBS; 1421 else 1422 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1423 } 1424 1425 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1426 { 1427 qc->dma_dir = DMA_NONE; 1428 qc->sg = NULL; 1429 qc->flags = 0; 1430 qc->cursg = NULL; 1431 qc->cursg_ofs = 0; 1432 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1433 qc->n_elem = 0; 1434 qc->err_mask = 0; 1435 qc->sect_size = ATA_SECT_SIZE; 1436 1437 ata_tf_init(qc->dev, &qc->tf); 1438 1439 /* init result_tf such that it indicates normal completion */ 1440 qc->result_tf.command = ATA_DRDY; 1441 qc->result_tf.feature = 0; 1442 } 1443 1444 static inline int ata_try_flush_cache(const struct ata_device *dev) 1445 { 1446 return ata_id_wcache_enabled(dev->id) || 1447 ata_id_has_flush(dev->id) || 1448 ata_id_has_flush_ext(dev->id); 1449 } 1450 1451 static inline unsigned int ac_err_mask(u8 status) 1452 { 1453 if (status & (ATA_BUSY | ATA_DRQ)) 1454 return AC_ERR_HSM; 1455 if (status & (ATA_ERR | ATA_DF)) 1456 return AC_ERR_DEV; 1457 return 0; 1458 } 1459 1460 static inline unsigned int __ac_err_mask(u8 status) 1461 { 1462 unsigned int mask = ac_err_mask(status); 1463 if (mask == 0) 1464 return AC_ERR_OTHER; 1465 return mask; 1466 } 1467 1468 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1469 { 1470 return *(struct ata_port **)&host->hostdata[0]; 1471 } 1472 1473 static inline int ata_check_ready(u8 status) 1474 { 1475 if (!(status & ATA_BUSY)) 1476 return 1; 1477 1478 /* 0xff indicates either no device or device not ready */ 1479 if (status == 0xff) 1480 return -ENODEV; 1481 1482 return 0; 1483 } 1484 1485 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1486 unsigned long timeout_msecs) 1487 { 1488 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1489 } 1490 1491 /* Don't open code these in drivers as there are traps. Firstly the range may 1492 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1493 > UDMA_0. Dyma ddreigiau */ 1494 1495 static inline int ata_using_mwdma(struct ata_device *adev) 1496 { 1497 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1498 return 1; 1499 return 0; 1500 } 1501 1502 static inline int ata_using_udma(struct ata_device *adev) 1503 { 1504 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1505 return 1; 1506 return 0; 1507 } 1508 1509 static inline int ata_dma_enabled(struct ata_device *adev) 1510 { 1511 return (adev->dma_mode == 0xFF ? 0 : 1); 1512 } 1513 1514 /************************************************************************** 1515 * PMP - drivers/ata/libata-pmp.c 1516 */ 1517 #ifdef CONFIG_SATA_PMP 1518 1519 extern const struct ata_port_operations sata_pmp_port_ops; 1520 1521 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1522 extern void sata_pmp_error_handler(struct ata_port *ap); 1523 1524 #else /* CONFIG_SATA_PMP */ 1525 1526 #define sata_pmp_port_ops sata_port_ops 1527 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1528 #define sata_pmp_error_handler ata_std_error_handler 1529 1530 #endif /* CONFIG_SATA_PMP */ 1531 1532 1533 /************************************************************************** 1534 * SFF - drivers/ata/libata-sff.c 1535 */ 1536 #ifdef CONFIG_ATA_SFF 1537 1538 extern const struct ata_port_operations ata_sff_port_ops; 1539 extern const struct ata_port_operations ata_bmdma_port_ops; 1540 extern const struct ata_port_operations ata_bmdma32_port_ops; 1541 1542 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1543 #define ATA_PIO_SHT(drv_name) \ 1544 ATA_BASE_SHT(drv_name), \ 1545 .sg_tablesize = LIBATA_MAX_PRD, \ 1546 .dma_boundary = ATA_DMA_BOUNDARY 1547 1548 #define ATA_BMDMA_SHT(drv_name) \ 1549 ATA_BASE_SHT(drv_name), \ 1550 .sg_tablesize = LIBATA_MAX_PRD, \ 1551 .dma_boundary = ATA_DMA_BOUNDARY 1552 1553 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc); 1554 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc); 1555 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1556 extern u8 ata_sff_check_status(struct ata_port *ap); 1557 extern void ata_sff_pause(struct ata_port *ap); 1558 extern void ata_sff_dma_pause(struct ata_port *ap); 1559 extern int ata_sff_busy_sleep(struct ata_port *ap, 1560 unsigned long timeout_pat, unsigned long timeout); 1561 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1562 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1563 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1564 extern void ata_sff_exec_command(struct ata_port *ap, 1565 const struct ata_taskfile *tf); 1566 extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1567 unsigned char *buf, unsigned int buflen, int rw); 1568 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1569 unsigned char *buf, unsigned int buflen, int rw); 1570 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1571 unsigned char *buf, unsigned int buflen, int rw); 1572 extern u8 ata_sff_irq_on(struct ata_port *ap); 1573 extern void ata_sff_irq_clear(struct ata_port *ap); 1574 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1575 u8 status, int in_wq); 1576 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1577 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1578 extern unsigned int ata_sff_host_intr(struct ata_port *ap, 1579 struct ata_queued_cmd *qc); 1580 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1581 extern void ata_sff_lost_interrupt(struct ata_port *ap); 1582 extern void ata_sff_freeze(struct ata_port *ap); 1583 extern void ata_sff_thaw(struct ata_port *ap); 1584 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1585 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1586 u8 *r_err); 1587 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1588 unsigned long deadline); 1589 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1590 unsigned long deadline); 1591 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1592 unsigned long deadline); 1593 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1594 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1595 extern void ata_sff_error_handler(struct ata_port *ap); 1596 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc); 1597 extern int ata_sff_port_start(struct ata_port *ap); 1598 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1599 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev, 1600 unsigned long xfer_mask); 1601 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1602 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1603 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1604 extern u8 ata_bmdma_status(struct ata_port *ap); 1605 extern void ata_bus_reset(struct ata_port *ap); 1606 1607 #ifdef CONFIG_PCI 1608 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1609 extern int ata_pci_bmdma_init(struct ata_host *host); 1610 extern int ata_pci_sff_init_host(struct ata_host *host); 1611 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1612 const struct ata_port_info * const * ppi, 1613 struct ata_host **r_host); 1614 extern int ata_pci_sff_activate_host(struct ata_host *host, 1615 irq_handler_t irq_handler, 1616 struct scsi_host_template *sht); 1617 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1618 const struct ata_port_info * const * ppi, 1619 struct scsi_host_template *sht, void *host_priv); 1620 #endif /* CONFIG_PCI */ 1621 1622 /** 1623 * ata_sff_busy_wait - Wait for a port status register 1624 * @ap: Port to wait for. 1625 * @bits: bits that must be clear 1626 * @max: number of 10uS waits to perform 1627 * 1628 * Waits up to max*10 microseconds for the selected bits in the port's 1629 * status register to be cleared. 1630 * Returns final value of status register. 1631 * 1632 * LOCKING: 1633 * Inherited from caller. 1634 */ 1635 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1636 unsigned int max) 1637 { 1638 u8 status; 1639 1640 do { 1641 udelay(10); 1642 status = ap->ops->sff_check_status(ap); 1643 max--; 1644 } while (status != 0xff && (status & bits) && (max > 0)); 1645 1646 return status; 1647 } 1648 1649 /** 1650 * ata_wait_idle - Wait for a port to be idle. 1651 * @ap: Port to wait for. 1652 * 1653 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1654 * Returns final value of status register. 1655 * 1656 * LOCKING: 1657 * Inherited from caller. 1658 */ 1659 static inline u8 ata_wait_idle(struct ata_port *ap) 1660 { 1661 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1662 1663 #ifdef ATA_DEBUG 1664 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1665 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1666 status); 1667 #endif 1668 1669 return status; 1670 } 1671 #endif /* CONFIG_ATA_SFF */ 1672 1673 #endif /* __LINUX_LIBATA_H__ */ 1674