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 = 1000, 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; 533 534 int dma_dir; 535 536 unsigned int sect_size; 537 538 unsigned int nbytes; 539 unsigned int extrabytes; 540 unsigned int curbytes; 541 542 struct scatterlist *cursg; 543 unsigned int cursg_ofs; 544 545 struct scatterlist sgent; 546 547 struct scatterlist *sg; 548 549 unsigned int err_mask; 550 struct ata_taskfile result_tf; 551 ata_qc_cb_t complete_fn; 552 553 void *private_data; 554 void *lldd_task; 555 }; 556 557 struct ata_port_stats { 558 unsigned long unhandled_irq; 559 unsigned long idle_irq; 560 unsigned long rw_reqbuf; 561 }; 562 563 struct ata_ering_entry { 564 unsigned int eflags; 565 unsigned int err_mask; 566 u64 timestamp; 567 }; 568 569 struct ata_ering { 570 int cursor; 571 struct ata_ering_entry ring[ATA_ERING_SIZE]; 572 }; 573 574 struct ata_device { 575 struct ata_link *link; 576 unsigned int devno; /* 0 or 1 */ 577 unsigned int horkage; /* List of broken features */ 578 unsigned long flags; /* ATA_DFLAG_xxx */ 579 struct scsi_device *sdev; /* attached SCSI device */ 580 #ifdef CONFIG_ATA_ACPI 581 acpi_handle acpi_handle; 582 union acpi_object *gtf_cache; 583 #endif 584 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 585 u64 n_sectors; /* size of device, if ATA */ 586 unsigned int class; /* ATA_DEV_xxx */ 587 unsigned long unpark_deadline; 588 589 u8 pio_mode; 590 u8 dma_mode; 591 u8 xfer_mode; 592 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 593 594 unsigned int multi_count; /* sectors count for 595 READ/WRITE MULTIPLE */ 596 unsigned int max_sectors; /* per-device max sectors */ 597 unsigned int cdb_len; 598 599 /* per-dev xfer mask */ 600 unsigned long pio_mask; 601 unsigned long mwdma_mask; 602 unsigned long udma_mask; 603 604 /* for CHS addressing */ 605 u16 cylinders; /* Number of cylinders */ 606 u16 heads; /* Number of heads */ 607 u16 sectors; /* Number of sectors per track */ 608 609 union { 610 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 611 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 612 }; 613 614 /* error history */ 615 int spdn_cnt; 616 /* ering is CLEAR_END, read comment above CLEAR_END */ 617 struct ata_ering ering; 618 }; 619 620 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 621 * cleared to zero on ata_dev_init(). 622 */ 623 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 624 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 625 626 struct ata_eh_info { 627 struct ata_device *dev; /* offending device */ 628 u32 serror; /* SError from LLDD */ 629 unsigned int err_mask; /* port-wide err_mask */ 630 unsigned int action; /* ATA_EH_* action mask */ 631 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 632 unsigned int flags; /* ATA_EHI_* flags */ 633 634 unsigned int probe_mask; 635 636 char desc[ATA_EH_DESC_LEN]; 637 int desc_len; 638 }; 639 640 struct ata_eh_context { 641 struct ata_eh_info i; 642 int tries[ATA_MAX_DEVICES]; 643 int cmd_timeout_idx[ATA_MAX_DEVICES] 644 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 645 unsigned int classes[ATA_MAX_DEVICES]; 646 unsigned int did_probe_mask; 647 unsigned int unloaded_mask; 648 unsigned int saved_ncq_enabled; 649 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 650 /* timestamp for the last reset attempt or success */ 651 unsigned long last_reset; 652 }; 653 654 struct ata_acpi_drive 655 { 656 u32 pio; 657 u32 dma; 658 } __packed; 659 660 struct ata_acpi_gtm { 661 struct ata_acpi_drive drive[2]; 662 u32 flags; 663 } __packed; 664 665 struct ata_link { 666 struct ata_port *ap; 667 int pmp; /* port multiplier port # */ 668 669 unsigned int active_tag; /* active tag on this link */ 670 u32 sactive; /* active NCQ commands */ 671 672 unsigned int flags; /* ATA_LFLAG_xxx */ 673 674 u32 saved_scontrol; /* SControl on probe */ 675 unsigned int hw_sata_spd_limit; 676 unsigned int sata_spd_limit; 677 unsigned int sata_spd; /* current SATA PHY speed */ 678 679 /* record runtime error info, protected by host_set lock */ 680 struct ata_eh_info eh_info; 681 /* EH context */ 682 struct ata_eh_context eh_context; 683 684 struct ata_device device[ATA_MAX_DEVICES]; 685 }; 686 687 struct ata_port { 688 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 689 struct ata_port_operations *ops; 690 spinlock_t *lock; 691 unsigned long flags; /* ATA_FLAG_xxx */ 692 unsigned int pflags; /* ATA_PFLAG_xxx */ 693 unsigned int print_id; /* user visible unique port ID */ 694 unsigned int port_no; /* 0 based port no. inside the host */ 695 696 struct ata_prd *prd; /* our SG list */ 697 dma_addr_t prd_dma; /* and its DMA mapping */ 698 699 #ifdef CONFIG_ATA_SFF 700 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 701 #endif /* CONFIG_ATA_SFF */ 702 703 u8 ctl; /* cache of ATA control register */ 704 u8 last_ctl; /* Cache last written value */ 705 unsigned int pio_mask; 706 unsigned int mwdma_mask; 707 unsigned int udma_mask; 708 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 709 710 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 711 unsigned long qc_allocated; 712 unsigned int qc_active; 713 int nr_active_links; /* #links with active qcs */ 714 715 struct ata_link link; /* host default link */ 716 struct ata_link *slave_link; /* see ata_slave_link_init() */ 717 718 int nr_pmp_links; /* nr of available PMP links */ 719 struct ata_link *pmp_link; /* array of PMP links */ 720 struct ata_link *excl_link; /* for PMP qc exclusion */ 721 722 struct ata_port_stats stats; 723 struct ata_host *host; 724 struct device *dev; 725 726 void *port_task_data; 727 struct delayed_work port_task; 728 struct delayed_work hotplug_task; 729 struct work_struct scsi_rescan_task; 730 731 unsigned int hsm_task_state; 732 733 u32 msg_enable; 734 struct list_head eh_done_q; 735 wait_queue_head_t eh_wait_q; 736 int eh_tries; 737 struct completion park_req_pending; 738 739 pm_message_t pm_mesg; 740 int *pm_result; 741 enum link_pm pm_policy; 742 743 struct timer_list fastdrain_timer; 744 unsigned long fastdrain_cnt; 745 746 int em_message_type; 747 void *private_data; 748 749 #ifdef CONFIG_ATA_ACPI 750 acpi_handle acpi_handle; 751 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 752 #endif 753 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 754 }; 755 756 /* The following initializer overrides a method to NULL whether one of 757 * its parent has the method defined or not. This is equivalent to 758 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 759 * expression and thus can't be used as an initializer. 760 */ 761 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 762 763 struct ata_port_operations { 764 /* 765 * Command execution 766 */ 767 int (*qc_defer)(struct ata_queued_cmd *qc); 768 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 769 void (*qc_prep)(struct ata_queued_cmd *qc); 770 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 771 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 772 773 /* 774 * Configuration and exception handling 775 */ 776 int (*cable_detect)(struct ata_port *ap); 777 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 778 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 779 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 780 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 781 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 782 783 void (*dev_config)(struct ata_device *dev); 784 785 void (*freeze)(struct ata_port *ap); 786 void (*thaw)(struct ata_port *ap); 787 ata_prereset_fn_t prereset; 788 ata_reset_fn_t softreset; 789 ata_reset_fn_t hardreset; 790 ata_postreset_fn_t postreset; 791 ata_prereset_fn_t pmp_prereset; 792 ata_reset_fn_t pmp_softreset; 793 ata_reset_fn_t pmp_hardreset; 794 ata_postreset_fn_t pmp_postreset; 795 void (*error_handler)(struct ata_port *ap); 796 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 797 798 /* 799 * Optional features 800 */ 801 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 802 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 803 void (*pmp_attach)(struct ata_port *ap); 804 void (*pmp_detach)(struct ata_port *ap); 805 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 806 void (*disable_pm)(struct ata_port *ap); 807 808 /* 809 * Start, stop, suspend and resume 810 */ 811 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 812 int (*port_resume)(struct ata_port *ap); 813 int (*port_start)(struct ata_port *ap); 814 void (*port_stop)(struct ata_port *ap); 815 void (*host_stop)(struct ata_host *host); 816 817 #ifdef CONFIG_ATA_SFF 818 /* 819 * SFF / taskfile oriented ops 820 */ 821 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 822 u8 (*sff_check_status)(struct ata_port *ap); 823 u8 (*sff_check_altstatus)(struct ata_port *ap); 824 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 825 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 826 void (*sff_exec_command)(struct ata_port *ap, 827 const struct ata_taskfile *tf); 828 unsigned int (*sff_data_xfer)(struct ata_device *dev, 829 unsigned char *buf, unsigned int buflen, int rw); 830 u8 (*sff_irq_on)(struct ata_port *); 831 void (*sff_irq_clear)(struct ata_port *); 832 833 void (*bmdma_setup)(struct ata_queued_cmd *qc); 834 void (*bmdma_start)(struct ata_queued_cmd *qc); 835 void (*bmdma_stop)(struct ata_queued_cmd *qc); 836 u8 (*bmdma_status)(struct ata_port *ap); 837 #endif /* CONFIG_ATA_SFF */ 838 839 ssize_t (*em_show)(struct ata_port *ap, char *buf); 840 ssize_t (*em_store)(struct ata_port *ap, const char *message, 841 size_t size); 842 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 843 ssize_t (*sw_activity_store)(struct ata_device *dev, 844 enum sw_activity val); 845 /* 846 * Obsolete 847 */ 848 void (*phy_reset)(struct ata_port *ap); 849 void (*eng_timeout)(struct ata_port *ap); 850 851 /* 852 * ->inherits must be the last field and all the preceding 853 * fields must be pointers. 854 */ 855 const struct ata_port_operations *inherits; 856 }; 857 858 struct ata_port_info { 859 unsigned long flags; 860 unsigned long link_flags; 861 unsigned long pio_mask; 862 unsigned long mwdma_mask; 863 unsigned long udma_mask; 864 struct ata_port_operations *port_ops; 865 void *private_data; 866 }; 867 868 struct ata_timing { 869 unsigned short mode; /* ATA mode */ 870 unsigned short setup; /* t1 */ 871 unsigned short act8b; /* t2 for 8-bit I/O */ 872 unsigned short rec8b; /* t2i for 8-bit I/O */ 873 unsigned short cyc8b; /* t0 for 8-bit I/O */ 874 unsigned short active; /* t2 or tD */ 875 unsigned short recover; /* t2i or tK */ 876 unsigned short dmack_hold; /* tj */ 877 unsigned short cycle; /* t0 */ 878 unsigned short udma; /* t2CYCTYP/2 */ 879 }; 880 881 /* 882 * Core layer - drivers/ata/libata-core.c 883 */ 884 extern const unsigned long sata_deb_timing_normal[]; 885 extern const unsigned long sata_deb_timing_hotplug[]; 886 extern const unsigned long sata_deb_timing_long[]; 887 888 extern struct ata_port_operations ata_dummy_port_ops; 889 extern const struct ata_port_info ata_dummy_port_info; 890 891 static inline const unsigned long * 892 sata_ehc_deb_timing(struct ata_eh_context *ehc) 893 { 894 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 895 return sata_deb_timing_hotplug; 896 else 897 return sata_deb_timing_normal; 898 } 899 900 static inline int ata_port_is_dummy(struct ata_port *ap) 901 { 902 return ap->ops == &ata_dummy_port_ops; 903 } 904 905 extern void ata_port_probe(struct ata_port *); 906 extern int sata_set_spd(struct ata_link *link); 907 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 908 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 909 int (*check_ready)(struct ata_link *link)); 910 extern int sata_link_debounce(struct ata_link *link, 911 const unsigned long *params, unsigned long deadline); 912 extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 913 unsigned long deadline); 914 extern int sata_link_hardreset(struct ata_link *link, 915 const unsigned long *timing, unsigned long deadline, 916 bool *online, int (*check_ready)(struct ata_link *)); 917 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 918 unsigned long deadline); 919 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 920 extern void ata_port_disable(struct ata_port *); 921 922 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 923 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 924 const struct ata_port_info * const * ppi, int n_ports); 925 extern int ata_slave_link_init(struct ata_port *ap); 926 extern int ata_host_start(struct ata_host *host); 927 extern int ata_host_register(struct ata_host *host, 928 struct scsi_host_template *sht); 929 extern int ata_host_activate(struct ata_host *host, int irq, 930 irq_handler_t irq_handler, unsigned long irq_flags, 931 struct scsi_host_template *sht); 932 extern void ata_host_detach(struct ata_host *host); 933 extern void ata_host_init(struct ata_host *, struct device *, 934 unsigned long, struct ata_port_operations *); 935 extern int ata_scsi_detect(struct scsi_host_template *sht); 936 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 937 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 938 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 939 int cmd, void __user *arg); 940 extern void ata_sas_port_destroy(struct ata_port *); 941 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 942 struct ata_port_info *, struct Scsi_Host *); 943 extern int ata_sas_port_init(struct ata_port *); 944 extern int ata_sas_port_start(struct ata_port *ap); 945 extern void ata_sas_port_stop(struct ata_port *ap); 946 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 947 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 948 struct ata_port *ap); 949 extern int sata_scr_valid(struct ata_link *link); 950 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 951 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 952 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 953 extern bool ata_link_online(struct ata_link *link); 954 extern bool ata_link_offline(struct ata_link *link); 955 #ifdef CONFIG_PM 956 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 957 extern void ata_host_resume(struct ata_host *host); 958 #endif 959 extern int ata_ratelimit(void); 960 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 961 unsigned long interval, unsigned long timeout); 962 extern int atapi_cmd_type(u8 opcode); 963 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 964 u8 pmp, int is_cmd, u8 *fis); 965 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 966 extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 967 unsigned long mwdma_mask, unsigned long udma_mask); 968 extern void ata_unpack_xfermask(unsigned long xfer_mask, 969 unsigned long *pio_mask, unsigned long *mwdma_mask, 970 unsigned long *udma_mask); 971 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 972 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 973 extern int ata_xfer_mode2shift(unsigned long xfer_mode); 974 extern const char *ata_mode_string(unsigned long xfer_mask); 975 extern unsigned long ata_id_xfermask(const u16 *id); 976 extern int ata_port_start(struct ata_port *ap); 977 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 978 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 979 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 980 unsigned int n_elem); 981 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 982 extern void ata_dev_disable(struct ata_device *adev); 983 extern void ata_id_string(const u16 *id, unsigned char *s, 984 unsigned int ofs, unsigned int len); 985 extern void ata_id_c_string(const u16 *id, unsigned char *s, 986 unsigned int ofs, unsigned int len); 987 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 988 struct ata_taskfile *tf, u16 *id); 989 extern void ata_qc_complete(struct ata_queued_cmd *qc); 990 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 991 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 992 void (*done)(struct scsi_cmnd *)); 993 extern int ata_std_bios_param(struct scsi_device *sdev, 994 struct block_device *bdev, 995 sector_t capacity, int geom[]); 996 extern int ata_scsi_slave_config(struct scsi_device *sdev); 997 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 998 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 999 int queue_depth); 1000 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1001 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1002 1003 extern int ata_cable_40wire(struct ata_port *ap); 1004 extern int ata_cable_80wire(struct ata_port *ap); 1005 extern int ata_cable_sata(struct ata_port *ap); 1006 extern int ata_cable_ignore(struct ata_port *ap); 1007 extern int ata_cable_unknown(struct ata_port *ap); 1008 1009 /* Timing helpers */ 1010 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1011 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1012 extern int ata_timing_compute(struct ata_device *, unsigned short, 1013 struct ata_timing *, int, int); 1014 extern void ata_timing_merge(const struct ata_timing *, 1015 const struct ata_timing *, struct ata_timing *, 1016 unsigned int); 1017 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1018 1019 /* PCI */ 1020 #ifdef CONFIG_PCI 1021 struct pci_dev; 1022 1023 struct pci_bits { 1024 unsigned int reg; /* PCI config register to read */ 1025 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1026 unsigned long mask; 1027 unsigned long val; 1028 }; 1029 1030 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1031 extern void ata_pci_remove_one(struct pci_dev *pdev); 1032 1033 #ifdef CONFIG_PM 1034 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1035 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1036 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1037 extern int ata_pci_device_resume(struct pci_dev *pdev); 1038 #endif /* CONFIG_PM */ 1039 #endif /* CONFIG_PCI */ 1040 1041 /* 1042 * ACPI - drivers/ata/libata-acpi.c 1043 */ 1044 #ifdef CONFIG_ATA_ACPI 1045 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1046 { 1047 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1048 return &ap->__acpi_init_gtm; 1049 return NULL; 1050 } 1051 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1052 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1053 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1054 const struct ata_acpi_gtm *gtm); 1055 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1056 #else 1057 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1058 { 1059 return NULL; 1060 } 1061 1062 static inline int ata_acpi_stm(const struct ata_port *ap, 1063 struct ata_acpi_gtm *stm) 1064 { 1065 return -ENOSYS; 1066 } 1067 1068 static inline int ata_acpi_gtm(const struct ata_port *ap, 1069 struct ata_acpi_gtm *stm) 1070 { 1071 return -ENOSYS; 1072 } 1073 1074 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1075 const struct ata_acpi_gtm *gtm) 1076 { 1077 return 0; 1078 } 1079 1080 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1081 const struct ata_acpi_gtm *gtm) 1082 { 1083 return 0; 1084 } 1085 #endif 1086 1087 /* 1088 * EH - drivers/ata/libata-eh.c 1089 */ 1090 extern void ata_port_schedule_eh(struct ata_port *ap); 1091 extern int ata_link_abort(struct ata_link *link); 1092 extern int ata_port_abort(struct ata_port *ap); 1093 extern int ata_port_freeze(struct ata_port *ap); 1094 extern int sata_async_notification(struct ata_port *ap); 1095 1096 extern void ata_eh_freeze_port(struct ata_port *ap); 1097 extern void ata_eh_thaw_port(struct ata_port *ap); 1098 1099 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1100 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1101 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1102 1103 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1104 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1105 ata_postreset_fn_t postreset); 1106 extern void ata_std_error_handler(struct ata_port *ap); 1107 1108 /* 1109 * Base operations to inherit from and initializers for sht 1110 * 1111 * Operations 1112 * 1113 * base : Common to all libata drivers. 1114 * sata : SATA controllers w/ native interface. 1115 * pmp : SATA controllers w/ PMP support. 1116 * sff : SFF ATA controllers w/o BMDMA support. 1117 * bmdma : SFF ATA controllers w/ BMDMA support. 1118 * 1119 * sht initializers 1120 * 1121 * BASE : Common to all libata drivers. The user must set 1122 * sg_tablesize and dma_boundary. 1123 * PIO : SFF ATA controllers w/ only PIO support. 1124 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1125 * dma_boundary are set to BMDMA limits. 1126 * NCQ : SATA controllers supporting NCQ. The user must set 1127 * sg_tablesize, dma_boundary and can_queue. 1128 */ 1129 extern const struct ata_port_operations ata_base_port_ops; 1130 extern const struct ata_port_operations sata_port_ops; 1131 extern struct device_attribute *ata_common_sdev_attrs[]; 1132 1133 #define ATA_BASE_SHT(drv_name) \ 1134 .module = THIS_MODULE, \ 1135 .name = drv_name, \ 1136 .ioctl = ata_scsi_ioctl, \ 1137 .queuecommand = ata_scsi_queuecmd, \ 1138 .can_queue = ATA_DEF_QUEUE, \ 1139 .this_id = ATA_SHT_THIS_ID, \ 1140 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1141 .emulated = ATA_SHT_EMULATED, \ 1142 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1143 .proc_name = drv_name, \ 1144 .slave_configure = ata_scsi_slave_config, \ 1145 .slave_destroy = ata_scsi_slave_destroy, \ 1146 .bios_param = ata_std_bios_param, \ 1147 .sdev_attrs = ata_common_sdev_attrs 1148 1149 #define ATA_NCQ_SHT(drv_name) \ 1150 ATA_BASE_SHT(drv_name), \ 1151 .change_queue_depth = ata_scsi_change_queue_depth 1152 1153 /* 1154 * PMP helpers 1155 */ 1156 #ifdef CONFIG_SATA_PMP 1157 static inline bool sata_pmp_supported(struct ata_port *ap) 1158 { 1159 return ap->flags & ATA_FLAG_PMP; 1160 } 1161 1162 static inline bool sata_pmp_attached(struct ata_port *ap) 1163 { 1164 return ap->nr_pmp_links != 0; 1165 } 1166 1167 static inline int ata_is_host_link(const struct ata_link *link) 1168 { 1169 return link == &link->ap->link || link == link->ap->slave_link; 1170 } 1171 #else /* CONFIG_SATA_PMP */ 1172 static inline bool sata_pmp_supported(struct ata_port *ap) 1173 { 1174 return false; 1175 } 1176 1177 static inline bool sata_pmp_attached(struct ata_port *ap) 1178 { 1179 return false; 1180 } 1181 1182 static inline int ata_is_host_link(const struct ata_link *link) 1183 { 1184 return 1; 1185 } 1186 #endif /* CONFIG_SATA_PMP */ 1187 1188 static inline int sata_srst_pmp(struct ata_link *link) 1189 { 1190 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1191 return SATA_PMP_CTRL_PORT; 1192 return link->pmp; 1193 } 1194 1195 /* 1196 * printk helpers 1197 */ 1198 #define ata_port_printk(ap, lv, fmt, args...) \ 1199 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1200 1201 #define ata_link_printk(link, lv, fmt, args...) do { \ 1202 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1203 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1204 (link)->pmp , ##args); \ 1205 else \ 1206 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1207 } while(0) 1208 1209 #define ata_dev_printk(dev, lv, fmt, args...) \ 1210 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1211 (dev)->link->pmp + (dev)->devno , ##args) 1212 1213 /* 1214 * ata_eh_info helpers 1215 */ 1216 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1217 __attribute__ ((format (printf, 2, 3))); 1218 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1219 __attribute__ ((format (printf, 2, 3))); 1220 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1221 1222 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1223 { 1224 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1225 ehi->flags |= ATA_EHI_HOTPLUGGED; 1226 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1227 ehi->err_mask |= AC_ERR_ATA_BUS; 1228 } 1229 1230 /* 1231 * port description helpers 1232 */ 1233 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1234 __attribute__ ((format (printf, 2, 3))); 1235 #ifdef CONFIG_PCI 1236 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1237 const char *name); 1238 #endif 1239 1240 static inline unsigned int ata_tag_valid(unsigned int tag) 1241 { 1242 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1243 } 1244 1245 static inline unsigned int ata_tag_internal(unsigned int tag) 1246 { 1247 return tag == ATA_TAG_INTERNAL; 1248 } 1249 1250 /* 1251 * device helpers 1252 */ 1253 static inline unsigned int ata_class_enabled(unsigned int class) 1254 { 1255 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1256 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1257 } 1258 1259 static inline unsigned int ata_class_disabled(unsigned int class) 1260 { 1261 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1262 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1263 } 1264 1265 static inline unsigned int ata_class_absent(unsigned int class) 1266 { 1267 return !ata_class_enabled(class) && !ata_class_disabled(class); 1268 } 1269 1270 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1271 { 1272 return ata_class_enabled(dev->class); 1273 } 1274 1275 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1276 { 1277 return ata_class_disabled(dev->class); 1278 } 1279 1280 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1281 { 1282 return ata_class_absent(dev->class); 1283 } 1284 1285 /* 1286 * link helpers 1287 */ 1288 static inline int ata_link_max_devices(const struct ata_link *link) 1289 { 1290 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1291 return 2; 1292 return 1; 1293 } 1294 1295 static inline int ata_link_active(struct ata_link *link) 1296 { 1297 return ata_tag_valid(link->active_tag) || link->sactive; 1298 } 1299 1300 /* 1301 * Iterators 1302 * 1303 * ATA_LITER_* constants are used to select link iteration mode and 1304 * ATA_DITER_* device iteration mode. 1305 * 1306 * For a custom iteration directly using ata_{link|dev}_next(), if 1307 * @link or @dev, respectively, is NULL, the first element is 1308 * returned. @dev and @link can be any valid device or link and the 1309 * next element according to the iteration mode will be returned. 1310 * After the last element, NULL is returned. 1311 */ 1312 enum ata_link_iter_mode { 1313 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1314 * host link. no slave link */ 1315 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1316 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1317 * slave link still comes after host link */ 1318 }; 1319 1320 enum ata_dev_iter_mode { 1321 ATA_DITER_ENABLED, 1322 ATA_DITER_ENABLED_REVERSE, 1323 ATA_DITER_ALL, 1324 ATA_DITER_ALL_REVERSE, 1325 }; 1326 1327 extern struct ata_link *ata_link_next(struct ata_link *link, 1328 struct ata_port *ap, 1329 enum ata_link_iter_mode mode); 1330 1331 extern struct ata_device *ata_dev_next(struct ata_device *dev, 1332 struct ata_link *link, 1333 enum ata_dev_iter_mode mode); 1334 1335 /* 1336 * Shortcut notation for iterations 1337 * 1338 * ata_for_each_link() iterates over each link of @ap according to 1339 * @mode. @link points to the current link in the loop. @link is 1340 * NULL after loop termination. ata_for_each_dev() works the same way 1341 * except that it iterates over each device of @link. 1342 * 1343 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1344 * specified when using the following shorthand notations. Only the 1345 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1346 * specified. This not only increases brevity but also makes it 1347 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1348 */ 1349 #define ata_for_each_link(link, ap, mode) \ 1350 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1351 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1352 1353 #define ata_for_each_dev(dev, link, mode) \ 1354 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1355 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1356 1357 /** 1358 * ata_ncq_enabled - Test whether NCQ is enabled 1359 * @dev: ATA device to test for 1360 * 1361 * LOCKING: 1362 * spin_lock_irqsave(host lock) 1363 * 1364 * RETURNS: 1365 * 1 if NCQ is enabled for @dev, 0 otherwise. 1366 */ 1367 static inline int ata_ncq_enabled(struct ata_device *dev) 1368 { 1369 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1370 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1371 } 1372 1373 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1374 { 1375 qc->tf.ctl |= ATA_NIEN; 1376 } 1377 1378 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1379 unsigned int tag) 1380 { 1381 if (likely(ata_tag_valid(tag))) 1382 return &ap->qcmd[tag]; 1383 return NULL; 1384 } 1385 1386 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1387 unsigned int tag) 1388 { 1389 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1390 1391 if (unlikely(!qc) || !ap->ops->error_handler) 1392 return qc; 1393 1394 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1395 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1396 return qc; 1397 1398 return NULL; 1399 } 1400 1401 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1402 { 1403 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1404 } 1405 1406 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1407 { 1408 memset(tf, 0, sizeof(*tf)); 1409 1410 tf->ctl = dev->link->ap->ctl; 1411 if (dev->devno == 0) 1412 tf->device = ATA_DEVICE_OBS; 1413 else 1414 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1415 } 1416 1417 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1418 { 1419 qc->dma_dir = DMA_NONE; 1420 qc->sg = NULL; 1421 qc->flags = 0; 1422 qc->cursg = NULL; 1423 qc->cursg_ofs = 0; 1424 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1425 qc->n_elem = 0; 1426 qc->err_mask = 0; 1427 qc->sect_size = ATA_SECT_SIZE; 1428 1429 ata_tf_init(qc->dev, &qc->tf); 1430 1431 /* init result_tf such that it indicates normal completion */ 1432 qc->result_tf.command = ATA_DRDY; 1433 qc->result_tf.feature = 0; 1434 } 1435 1436 static inline int ata_try_flush_cache(const struct ata_device *dev) 1437 { 1438 return ata_id_wcache_enabled(dev->id) || 1439 ata_id_has_flush(dev->id) || 1440 ata_id_has_flush_ext(dev->id); 1441 } 1442 1443 static inline unsigned int ac_err_mask(u8 status) 1444 { 1445 if (status & (ATA_BUSY | ATA_DRQ)) 1446 return AC_ERR_HSM; 1447 if (status & (ATA_ERR | ATA_DF)) 1448 return AC_ERR_DEV; 1449 return 0; 1450 } 1451 1452 static inline unsigned int __ac_err_mask(u8 status) 1453 { 1454 unsigned int mask = ac_err_mask(status); 1455 if (mask == 0) 1456 return AC_ERR_OTHER; 1457 return mask; 1458 } 1459 1460 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1461 { 1462 return *(struct ata_port **)&host->hostdata[0]; 1463 } 1464 1465 static inline int ata_check_ready(u8 status) 1466 { 1467 if (!(status & ATA_BUSY)) 1468 return 1; 1469 1470 /* 0xff indicates either no device or device not ready */ 1471 if (status == 0xff) 1472 return -ENODEV; 1473 1474 return 0; 1475 } 1476 1477 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1478 unsigned long timeout_msecs) 1479 { 1480 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1481 } 1482 1483 /* Don't open code these in drivers as there are traps. Firstly the range may 1484 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1485 > UDMA_0. Dyma ddreigiau */ 1486 1487 static inline int ata_using_mwdma(struct ata_device *adev) 1488 { 1489 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1490 return 1; 1491 return 0; 1492 } 1493 1494 static inline int ata_using_udma(struct ata_device *adev) 1495 { 1496 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1497 return 1; 1498 return 0; 1499 } 1500 1501 static inline int ata_dma_enabled(struct ata_device *adev) 1502 { 1503 return (adev->dma_mode == 0xFF ? 0 : 1); 1504 } 1505 1506 /************************************************************************** 1507 * PMP - drivers/ata/libata-pmp.c 1508 */ 1509 #ifdef CONFIG_SATA_PMP 1510 1511 extern const struct ata_port_operations sata_pmp_port_ops; 1512 1513 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1514 extern void sata_pmp_error_handler(struct ata_port *ap); 1515 1516 #else /* CONFIG_SATA_PMP */ 1517 1518 #define sata_pmp_port_ops sata_port_ops 1519 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1520 #define sata_pmp_error_handler ata_std_error_handler 1521 1522 #endif /* CONFIG_SATA_PMP */ 1523 1524 1525 /************************************************************************** 1526 * SFF - drivers/ata/libata-sff.c 1527 */ 1528 #ifdef CONFIG_ATA_SFF 1529 1530 extern const struct ata_port_operations ata_sff_port_ops; 1531 extern const struct ata_port_operations ata_bmdma_port_ops; 1532 extern const struct ata_port_operations ata_bmdma32_port_ops; 1533 1534 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1535 #define ATA_PIO_SHT(drv_name) \ 1536 ATA_BASE_SHT(drv_name), \ 1537 .sg_tablesize = LIBATA_MAX_PRD, \ 1538 .dma_boundary = ATA_DMA_BOUNDARY 1539 1540 #define ATA_BMDMA_SHT(drv_name) \ 1541 ATA_BASE_SHT(drv_name), \ 1542 .sg_tablesize = LIBATA_MAX_PRD, \ 1543 .dma_boundary = ATA_DMA_BOUNDARY 1544 1545 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc); 1546 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc); 1547 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1548 extern u8 ata_sff_check_status(struct ata_port *ap); 1549 extern void ata_sff_pause(struct ata_port *ap); 1550 extern void ata_sff_dma_pause(struct ata_port *ap); 1551 extern int ata_sff_busy_sleep(struct ata_port *ap, 1552 unsigned long timeout_pat, unsigned long timeout); 1553 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1554 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1555 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1556 extern void ata_sff_exec_command(struct ata_port *ap, 1557 const struct ata_taskfile *tf); 1558 extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1559 unsigned char *buf, unsigned int buflen, int rw); 1560 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1561 unsigned char *buf, unsigned int buflen, int rw); 1562 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1563 unsigned char *buf, unsigned int buflen, int rw); 1564 extern u8 ata_sff_irq_on(struct ata_port *ap); 1565 extern void ata_sff_irq_clear(struct ata_port *ap); 1566 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1567 u8 status, int in_wq); 1568 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1569 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1570 extern unsigned int ata_sff_host_intr(struct ata_port *ap, 1571 struct ata_queued_cmd *qc); 1572 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1573 extern void ata_sff_freeze(struct ata_port *ap); 1574 extern void ata_sff_thaw(struct ata_port *ap); 1575 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1576 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1577 u8 *r_err); 1578 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1579 unsigned long deadline); 1580 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1581 unsigned long deadline); 1582 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1583 unsigned long deadline); 1584 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1585 extern void ata_sff_error_handler(struct ata_port *ap); 1586 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc); 1587 extern int ata_sff_port_start(struct ata_port *ap); 1588 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1589 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev, 1590 unsigned long xfer_mask); 1591 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1592 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1593 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1594 extern u8 ata_bmdma_status(struct ata_port *ap); 1595 extern void ata_bus_reset(struct ata_port *ap); 1596 1597 #ifdef CONFIG_PCI 1598 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1599 extern int ata_pci_bmdma_init(struct ata_host *host); 1600 extern int ata_pci_sff_init_host(struct ata_host *host); 1601 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1602 const struct ata_port_info * const * ppi, 1603 struct ata_host **r_host); 1604 extern int ata_pci_sff_activate_host(struct ata_host *host, 1605 irq_handler_t irq_handler, 1606 struct scsi_host_template *sht); 1607 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1608 const struct ata_port_info * const * ppi, 1609 struct scsi_host_template *sht, void *host_priv); 1610 #endif /* CONFIG_PCI */ 1611 1612 /** 1613 * ata_sff_busy_wait - Wait for a port status register 1614 * @ap: Port to wait for. 1615 * @bits: bits that must be clear 1616 * @max: number of 10uS waits to perform 1617 * 1618 * Waits up to max*10 microseconds for the selected bits in the port's 1619 * status register to be cleared. 1620 * Returns final value of status register. 1621 * 1622 * LOCKING: 1623 * Inherited from caller. 1624 */ 1625 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1626 unsigned int max) 1627 { 1628 u8 status; 1629 1630 do { 1631 udelay(10); 1632 status = ap->ops->sff_check_status(ap); 1633 max--; 1634 } while (status != 0xff && (status & bits) && (max > 0)); 1635 1636 return status; 1637 } 1638 1639 /** 1640 * ata_wait_idle - Wait for a port to be idle. 1641 * @ap: Port to wait for. 1642 * 1643 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1644 * Returns final value of status register. 1645 * 1646 * LOCKING: 1647 * Inherited from caller. 1648 */ 1649 static inline u8 ata_wait_idle(struct ata_port *ap) 1650 { 1651 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1652 1653 #ifdef ATA_DEBUG 1654 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1655 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1656 status); 1657 #endif 1658 1659 return status; 1660 } 1661 #endif /* CONFIG_ATA_SFF */ 1662 1663 #endif /* __LINUX_LIBATA_H__ */ 1664