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_SLEEPING = (1 << 15), /* device is sleeping */ 147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */ 148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */ 149 ATA_DFLAG_INIT_MASK = (1 << 24) - 1, 150 151 ATA_DFLAG_DETACH = (1 << 24), 152 ATA_DFLAG_DETACHED = (1 << 25), 153 154 ATA_DEV_UNKNOWN = 0, /* unknown device */ 155 ATA_DEV_ATA = 1, /* ATA device */ 156 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 157 ATA_DEV_ATAPI = 3, /* ATAPI device */ 158 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 159 ATA_DEV_PMP = 5, /* SATA port multiplier */ 160 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 161 ATA_DEV_SEMB = 7, /* SEMB */ 162 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 163 ATA_DEV_NONE = 9, /* no device */ 164 165 /* struct ata_link flags */ 166 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ 167 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ 168 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ 169 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ 170 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 171 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 172 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 173 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */ 174 175 /* struct ata_port flags */ 176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 177 /* (doesn't imply presence) */ 178 ATA_FLAG_SATA = (1 << 1), 179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 187 * doesn't handle PIO interrupts */ 188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 189 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ 190 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ 191 ATA_FLAG_DEBUGMSG = (1 << 13), 192 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */ 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 */ 211 212 213 /* struct ata_port pflags */ 214 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 215 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 216 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 217 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 218 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 219 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 220 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 221 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 222 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 223 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 224 225 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 226 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 227 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 228 229 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 230 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 231 232 /* struct ata_queued_cmd flags */ 233 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 234 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 235 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 236 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 237 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 238 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 239 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 240 241 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 242 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 243 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 244 245 /* host set flags */ 246 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 247 ATA_HOST_STARTED = (1 << 1), /* Host started */ 248 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 249 250 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 251 252 /* various lengths of time */ 253 ATA_TMOUT_BOOT = 30000, /* heuristic */ 254 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 255 ATA_TMOUT_INTERNAL_QUICK = 5000, 256 ATA_TMOUT_MAX_PARK = 30000, 257 258 /* FIXME: GoVault needs 2s but we can't afford that without 259 * parallel probing. 800ms is enough for iVDR disk 260 * HHD424020F7SV00. Increase to 2secs when parallel probing 261 * is in place. 262 */ 263 ATA_TMOUT_FF_WAIT = 800, 264 265 /* Spec mandates to wait for ">= 2ms" before checking status 266 * after reset. We wait 150ms, because that was the magic 267 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 268 * the period of time between when the ATA command register is 269 * written, and then status is checked. Because waiting for 270 * "a while" before checking status is fine, post SRST, we 271 * perform this magic delay here as well. 272 * 273 * Old drivers/ide uses the 2mS rule and then waits for ready. 274 */ 275 ATA_WAIT_AFTER_RESET = 150, 276 277 /* If PMP is supported, we have to do follow-up SRST. As some 278 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 279 * advised to wait only for the following duration before 280 * doing SRST. 281 */ 282 ATA_TMOUT_PMP_SRST_WAIT = 5000, 283 284 /* ATA bus states */ 285 BUS_UNKNOWN = 0, 286 BUS_DMA = 1, 287 BUS_IDLE = 2, 288 BUS_NOINTR = 3, 289 BUS_NODATA = 4, 290 BUS_TIMER = 5, 291 BUS_PIO = 6, 292 BUS_EDD = 7, 293 BUS_IDENTIFY = 8, 294 BUS_PACKET = 9, 295 296 /* SATA port states */ 297 PORT_UNKNOWN = 0, 298 PORT_ENABLED = 1, 299 PORT_DISABLED = 2, 300 301 /* encoding various smaller bitmaps into a single 302 * unsigned long bitmap 303 */ 304 ATA_NR_PIO_MODES = 7, 305 ATA_NR_MWDMA_MODES = 5, 306 ATA_NR_UDMA_MODES = 8, 307 308 ATA_SHIFT_PIO = 0, 309 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 310 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 311 312 /* size of buffer to pad xfers ending on unaligned boundaries */ 313 ATA_DMA_PAD_SZ = 4, 314 315 /* ering size */ 316 ATA_ERING_SIZE = 32, 317 318 /* return values for ->qc_defer */ 319 ATA_DEFER_LINK = 1, 320 ATA_DEFER_PORT = 2, 321 322 /* desc_len for ata_eh_info and context */ 323 ATA_EH_DESC_LEN = 80, 324 325 /* reset / recovery action types */ 326 ATA_EH_REVALIDATE = (1 << 0), 327 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 328 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 329 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 330 ATA_EH_ENABLE_LINK = (1 << 3), 331 ATA_EH_LPM = (1 << 4), /* link power management action */ 332 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 333 334 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 335 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 336 ATA_EH_ENABLE_LINK | ATA_EH_LPM, 337 338 /* ata_eh_info->flags */ 339 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 340 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 341 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 342 343 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 344 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 345 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 346 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 347 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 348 349 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 350 351 /* mask of flags to transfer *to* the slave link */ 352 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 353 354 /* max tries if error condition is still set after ->error_handler */ 355 ATA_EH_MAX_TRIES = 5, 356 357 /* sometimes resuming a link requires several retries */ 358 ATA_LINK_RESUME_TRIES = 5, 359 360 /* how hard are we gonna try to probe/recover devices */ 361 ATA_PROBE_MAX_TRIES = 3, 362 ATA_EH_DEV_TRIES = 3, 363 ATA_EH_PMP_TRIES = 5, 364 ATA_EH_PMP_LINK_TRIES = 3, 365 366 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 367 368 /* This should match the actual table size of 369 * ata_eh_cmd_timeout_table in libata-eh.c. 370 */ 371 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6, 372 373 /* Horkage types. May be set by libata or controller on drives 374 (some horkage may be drive/controller pair dependant */ 375 376 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 377 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 378 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 379 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 380 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 381 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 382 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 383 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */ 384 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 385 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 386 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 387 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 388 not multiple of 16 bytes */ 389 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */ 390 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 391 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ 392 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ 393 394 /* DMA mask for user DMA control: User visible values; DO NOT 395 renumber */ 396 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 397 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 398 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 399 400 /* ATAPI command types */ 401 ATAPI_READ = 0, /* READs */ 402 ATAPI_WRITE = 1, /* WRITEs */ 403 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 404 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 405 ATAPI_MISC = 4, /* the rest */ 406 407 /* Timing constants */ 408 ATA_TIMING_SETUP = (1 << 0), 409 ATA_TIMING_ACT8B = (1 << 1), 410 ATA_TIMING_REC8B = (1 << 2), 411 ATA_TIMING_CYC8B = (1 << 3), 412 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 413 ATA_TIMING_CYC8B, 414 ATA_TIMING_ACTIVE = (1 << 4), 415 ATA_TIMING_RECOVER = (1 << 5), 416 ATA_TIMING_DMACK_HOLD = (1 << 6), 417 ATA_TIMING_CYCLE = (1 << 7), 418 ATA_TIMING_UDMA = (1 << 8), 419 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 420 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 421 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 422 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 423 ATA_TIMING_UDMA, 424 425 /* ACPI constants */ 426 ATA_ACPI_FILTER_SETXFER = 1 << 0, 427 ATA_ACPI_FILTER_LOCK = 1 << 1, 428 ATA_ACPI_FILTER_DIPM = 1 << 2, 429 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 430 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 431 432 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 433 ATA_ACPI_FILTER_LOCK | 434 ATA_ACPI_FILTER_DIPM, 435 }; 436 437 enum ata_xfer_mask { 438 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 439 << ATA_SHIFT_PIO, 440 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 441 << ATA_SHIFT_MWDMA, 442 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 443 << ATA_SHIFT_UDMA, 444 }; 445 446 enum hsm_task_states { 447 HSM_ST_IDLE, /* no command on going */ 448 HSM_ST_FIRST, /* (waiting the device to) 449 write CDB or first data block */ 450 HSM_ST, /* (waiting the device to) transfer data */ 451 HSM_ST_LAST, /* (waiting the device to) complete command */ 452 HSM_ST_ERR, /* error */ 453 }; 454 455 enum ata_completion_errors { 456 AC_ERR_DEV = (1 << 0), /* device reported error */ 457 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 458 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 459 AC_ERR_MEDIA = (1 << 3), /* media error */ 460 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 461 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 462 AC_ERR_SYSTEM = (1 << 6), /* system error */ 463 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 464 AC_ERR_OTHER = (1 << 8), /* unknown */ 465 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 466 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 467 }; 468 469 /* forward declarations */ 470 struct scsi_device; 471 struct ata_port_operations; 472 struct ata_port; 473 struct ata_link; 474 struct ata_queued_cmd; 475 476 /* typedefs */ 477 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 478 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 479 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 480 unsigned long deadline); 481 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 482 483 /* 484 * host pm policy: If you alter this, you also need to alter libata-scsi.c 485 * (for the ascii descriptions) 486 */ 487 enum link_pm { 488 NOT_AVAILABLE, 489 MIN_POWER, 490 MAX_PERFORMANCE, 491 MEDIUM_POWER, 492 }; 493 extern struct device_attribute dev_attr_link_power_management_policy; 494 extern struct device_attribute dev_attr_unload_heads; 495 extern struct device_attribute dev_attr_em_message_type; 496 extern struct device_attribute dev_attr_em_message; 497 extern struct device_attribute dev_attr_sw_activity; 498 499 enum sw_activity { 500 OFF, 501 BLINK_ON, 502 BLINK_OFF, 503 }; 504 505 #ifdef CONFIG_ATA_SFF 506 struct ata_ioports { 507 void __iomem *cmd_addr; 508 void __iomem *data_addr; 509 void __iomem *error_addr; 510 void __iomem *feature_addr; 511 void __iomem *nsect_addr; 512 void __iomem *lbal_addr; 513 void __iomem *lbam_addr; 514 void __iomem *lbah_addr; 515 void __iomem *device_addr; 516 void __iomem *status_addr; 517 void __iomem *command_addr; 518 void __iomem *altstatus_addr; 519 void __iomem *ctl_addr; 520 void __iomem *bmdma_addr; 521 void __iomem *scr_addr; 522 }; 523 #endif /* CONFIG_ATA_SFF */ 524 525 struct ata_host { 526 spinlock_t lock; 527 struct device *dev; 528 void __iomem * const *iomap; 529 unsigned int n_ports; 530 void *private_data; 531 struct ata_port_operations *ops; 532 unsigned long flags; 533 #ifdef CONFIG_ATA_ACPI 534 acpi_handle acpi_handle; 535 #endif 536 struct ata_port *simplex_claimed; /* channel owning the DMA */ 537 struct ata_port *ports[0]; 538 }; 539 540 struct ata_queued_cmd { 541 struct ata_port *ap; 542 struct ata_device *dev; 543 544 struct scsi_cmnd *scsicmd; 545 void (*scsidone)(struct scsi_cmnd *); 546 547 struct ata_taskfile tf; 548 u8 cdb[ATAPI_CDB_LEN]; 549 550 unsigned long flags; /* ATA_QCFLAG_xxx */ 551 unsigned int tag; 552 unsigned int n_elem; 553 unsigned int orig_n_elem; 554 555 int dma_dir; 556 557 unsigned int sect_size; 558 559 unsigned int nbytes; 560 unsigned int extrabytes; 561 unsigned int curbytes; 562 563 struct scatterlist *cursg; 564 unsigned int cursg_ofs; 565 566 struct scatterlist sgent; 567 568 struct scatterlist *sg; 569 570 unsigned int err_mask; 571 struct ata_taskfile result_tf; 572 ata_qc_cb_t complete_fn; 573 574 void *private_data; 575 void *lldd_task; 576 }; 577 578 struct ata_port_stats { 579 unsigned long unhandled_irq; 580 unsigned long idle_irq; 581 unsigned long rw_reqbuf; 582 }; 583 584 struct ata_ering_entry { 585 unsigned int eflags; 586 unsigned int err_mask; 587 u64 timestamp; 588 }; 589 590 struct ata_ering { 591 int cursor; 592 struct ata_ering_entry ring[ATA_ERING_SIZE]; 593 }; 594 595 struct ata_device { 596 struct ata_link *link; 597 unsigned int devno; /* 0 or 1 */ 598 unsigned int horkage; /* List of broken features */ 599 unsigned long flags; /* ATA_DFLAG_xxx */ 600 struct scsi_device *sdev; /* attached SCSI device */ 601 void *private_data; 602 #ifdef CONFIG_ATA_ACPI 603 acpi_handle acpi_handle; 604 union acpi_object *gtf_cache; 605 unsigned int gtf_filter; 606 #endif 607 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 608 u64 n_sectors; /* size of device, if ATA */ 609 u64 n_native_sectors; /* native size, if ATA */ 610 unsigned int class; /* ATA_DEV_xxx */ 611 unsigned long unpark_deadline; 612 613 u8 pio_mode; 614 u8 dma_mode; 615 u8 xfer_mode; 616 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 617 618 unsigned int multi_count; /* sectors count for 619 READ/WRITE MULTIPLE */ 620 unsigned int max_sectors; /* per-device max sectors */ 621 unsigned int cdb_len; 622 623 /* per-dev xfer mask */ 624 unsigned long pio_mask; 625 unsigned long mwdma_mask; 626 unsigned long udma_mask; 627 628 /* for CHS addressing */ 629 u16 cylinders; /* Number of cylinders */ 630 u16 heads; /* Number of heads */ 631 u16 sectors; /* Number of sectors per track */ 632 633 union { 634 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 635 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 636 }; 637 638 /* error history */ 639 int spdn_cnt; 640 /* ering is CLEAR_END, read comment above CLEAR_END */ 641 struct ata_ering ering; 642 }; 643 644 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 645 * cleared to zero on ata_dev_init(). 646 */ 647 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 648 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 649 650 struct ata_eh_info { 651 struct ata_device *dev; /* offending device */ 652 u32 serror; /* SError from LLDD */ 653 unsigned int err_mask; /* port-wide err_mask */ 654 unsigned int action; /* ATA_EH_* action mask */ 655 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 656 unsigned int flags; /* ATA_EHI_* flags */ 657 658 unsigned int probe_mask; 659 660 char desc[ATA_EH_DESC_LEN]; 661 int desc_len; 662 }; 663 664 struct ata_eh_context { 665 struct ata_eh_info i; 666 int tries[ATA_MAX_DEVICES]; 667 int cmd_timeout_idx[ATA_MAX_DEVICES] 668 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 669 unsigned int classes[ATA_MAX_DEVICES]; 670 unsigned int did_probe_mask; 671 unsigned int unloaded_mask; 672 unsigned int saved_ncq_enabled; 673 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 674 /* timestamp for the last reset attempt or success */ 675 unsigned long last_reset; 676 }; 677 678 struct ata_acpi_drive 679 { 680 u32 pio; 681 u32 dma; 682 } __packed; 683 684 struct ata_acpi_gtm { 685 struct ata_acpi_drive drive[2]; 686 u32 flags; 687 } __packed; 688 689 struct ata_link { 690 struct ata_port *ap; 691 int pmp; /* port multiplier port # */ 692 693 unsigned int active_tag; /* active tag on this link */ 694 u32 sactive; /* active NCQ commands */ 695 696 unsigned int flags; /* ATA_LFLAG_xxx */ 697 698 u32 saved_scontrol; /* SControl on probe */ 699 unsigned int hw_sata_spd_limit; 700 unsigned int sata_spd_limit; 701 unsigned int sata_spd; /* current SATA PHY speed */ 702 703 /* record runtime error info, protected by host_set lock */ 704 struct ata_eh_info eh_info; 705 /* EH context */ 706 struct ata_eh_context eh_context; 707 708 struct ata_device device[ATA_MAX_DEVICES]; 709 }; 710 711 struct ata_port { 712 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 713 struct ata_port_operations *ops; 714 spinlock_t *lock; 715 /* Flags owned by the EH context. Only EH should touch these once the 716 port is active */ 717 unsigned long flags; /* ATA_FLAG_xxx */ 718 /* Flags that change dynamically, protected by ap->lock */ 719 unsigned int pflags; /* ATA_PFLAG_xxx */ 720 unsigned int print_id; /* user visible unique port ID */ 721 unsigned int port_no; /* 0 based port no. inside the host */ 722 723 struct ata_prd *prd; /* our SG list */ 724 dma_addr_t prd_dma; /* and its DMA mapping */ 725 726 #ifdef CONFIG_ATA_SFF 727 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 728 #endif /* CONFIG_ATA_SFF */ 729 730 u8 ctl; /* cache of ATA control register */ 731 u8 last_ctl; /* Cache last written value */ 732 unsigned int pio_mask; 733 unsigned int mwdma_mask; 734 unsigned int udma_mask; 735 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 736 737 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 738 unsigned long qc_allocated; 739 unsigned int qc_active; 740 int nr_active_links; /* #links with active qcs */ 741 742 struct ata_link link; /* host default link */ 743 struct ata_link *slave_link; /* see ata_slave_link_init() */ 744 745 int nr_pmp_links; /* nr of available PMP links */ 746 struct ata_link *pmp_link; /* array of PMP links */ 747 struct ata_link *excl_link; /* for PMP qc exclusion */ 748 749 struct ata_port_stats stats; 750 struct ata_host *host; 751 struct device *dev; 752 753 void *port_task_data; 754 struct delayed_work port_task; 755 struct delayed_work hotplug_task; 756 struct work_struct scsi_rescan_task; 757 758 unsigned int hsm_task_state; 759 760 u32 msg_enable; 761 struct list_head eh_done_q; 762 wait_queue_head_t eh_wait_q; 763 int eh_tries; 764 struct completion park_req_pending; 765 766 pm_message_t pm_mesg; 767 int *pm_result; 768 enum link_pm pm_policy; 769 770 struct timer_list fastdrain_timer; 771 unsigned long fastdrain_cnt; 772 773 int em_message_type; 774 void *private_data; 775 776 #ifdef CONFIG_ATA_ACPI 777 acpi_handle acpi_handle; 778 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 779 #endif 780 /* owned by EH */ 781 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 782 }; 783 784 /* The following initializer overrides a method to NULL whether one of 785 * its parent has the method defined or not. This is equivalent to 786 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 787 * expression and thus can't be used as an initializer. 788 */ 789 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 790 791 struct ata_port_operations { 792 /* 793 * Command execution 794 */ 795 int (*qc_defer)(struct ata_queued_cmd *qc); 796 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 797 void (*qc_prep)(struct ata_queued_cmd *qc); 798 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 799 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 800 801 /* 802 * Configuration and exception handling 803 */ 804 int (*cable_detect)(struct ata_port *ap); 805 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 806 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 807 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 808 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 809 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 810 811 void (*dev_config)(struct ata_device *dev); 812 813 void (*freeze)(struct ata_port *ap); 814 void (*thaw)(struct ata_port *ap); 815 ata_prereset_fn_t prereset; 816 ata_reset_fn_t softreset; 817 ata_reset_fn_t hardreset; 818 ata_postreset_fn_t postreset; 819 ata_prereset_fn_t pmp_prereset; 820 ata_reset_fn_t pmp_softreset; 821 ata_reset_fn_t pmp_hardreset; 822 ata_postreset_fn_t pmp_postreset; 823 void (*error_handler)(struct ata_port *ap); 824 void (*lost_interrupt)(struct ata_port *ap); 825 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 826 827 /* 828 * Optional features 829 */ 830 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 831 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 832 void (*pmp_attach)(struct ata_port *ap); 833 void (*pmp_detach)(struct ata_port *ap); 834 int (*enable_pm)(struct ata_port *ap, enum link_pm policy); 835 void (*disable_pm)(struct ata_port *ap); 836 837 /* 838 * Start, stop, suspend and resume 839 */ 840 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 841 int (*port_resume)(struct ata_port *ap); 842 int (*port_start)(struct ata_port *ap); 843 void (*port_stop)(struct ata_port *ap); 844 void (*host_stop)(struct ata_host *host); 845 846 #ifdef CONFIG_ATA_SFF 847 /* 848 * SFF / taskfile oriented ops 849 */ 850 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 851 u8 (*sff_check_status)(struct ata_port *ap); 852 u8 (*sff_check_altstatus)(struct ata_port *ap); 853 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 854 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 855 void (*sff_exec_command)(struct ata_port *ap, 856 const struct ata_taskfile *tf); 857 unsigned int (*sff_data_xfer)(struct ata_device *dev, 858 unsigned char *buf, unsigned int buflen, int rw); 859 u8 (*sff_irq_on)(struct ata_port *); 860 void (*sff_irq_clear)(struct ata_port *); 861 862 void (*bmdma_setup)(struct ata_queued_cmd *qc); 863 void (*bmdma_start)(struct ata_queued_cmd *qc); 864 void (*bmdma_stop)(struct ata_queued_cmd *qc); 865 u8 (*bmdma_status)(struct ata_port *ap); 866 867 void (*drain_fifo)(struct ata_queued_cmd *qc); 868 #endif /* CONFIG_ATA_SFF */ 869 870 ssize_t (*em_show)(struct ata_port *ap, char *buf); 871 ssize_t (*em_store)(struct ata_port *ap, const char *message, 872 size_t size); 873 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 874 ssize_t (*sw_activity_store)(struct ata_device *dev, 875 enum sw_activity val); 876 /* 877 * Obsolete 878 */ 879 void (*phy_reset)(struct ata_port *ap); 880 void (*eng_timeout)(struct ata_port *ap); 881 882 /* 883 * ->inherits must be the last field and all the preceding 884 * fields must be pointers. 885 */ 886 const struct ata_port_operations *inherits; 887 }; 888 889 struct ata_port_info { 890 unsigned long flags; 891 unsigned long link_flags; 892 unsigned long pio_mask; 893 unsigned long mwdma_mask; 894 unsigned long udma_mask; 895 struct ata_port_operations *port_ops; 896 void *private_data; 897 }; 898 899 struct ata_timing { 900 unsigned short mode; /* ATA mode */ 901 unsigned short setup; /* t1 */ 902 unsigned short act8b; /* t2 for 8-bit I/O */ 903 unsigned short rec8b; /* t2i for 8-bit I/O */ 904 unsigned short cyc8b; /* t0 for 8-bit I/O */ 905 unsigned short active; /* t2 or tD */ 906 unsigned short recover; /* t2i or tK */ 907 unsigned short dmack_hold; /* tj */ 908 unsigned short cycle; /* t0 */ 909 unsigned short udma; /* t2CYCTYP/2 */ 910 }; 911 912 /* 913 * Core layer - drivers/ata/libata-core.c 914 */ 915 extern const unsigned long sata_deb_timing_normal[]; 916 extern const unsigned long sata_deb_timing_hotplug[]; 917 extern const unsigned long sata_deb_timing_long[]; 918 919 extern struct ata_port_operations ata_dummy_port_ops; 920 extern const struct ata_port_info ata_dummy_port_info; 921 922 static inline const unsigned long * 923 sata_ehc_deb_timing(struct ata_eh_context *ehc) 924 { 925 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 926 return sata_deb_timing_hotplug; 927 else 928 return sata_deb_timing_normal; 929 } 930 931 static inline int ata_port_is_dummy(struct ata_port *ap) 932 { 933 return ap->ops == &ata_dummy_port_ops; 934 } 935 936 extern void ata_port_probe(struct ata_port *); 937 extern int sata_set_spd(struct ata_link *link); 938 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 939 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 940 int (*check_ready)(struct ata_link *link)); 941 extern int sata_link_debounce(struct ata_link *link, 942 const unsigned long *params, unsigned long deadline); 943 extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 944 unsigned long deadline); 945 extern int sata_link_hardreset(struct ata_link *link, 946 const unsigned long *timing, unsigned long deadline, 947 bool *online, int (*check_ready)(struct ata_link *)); 948 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 949 unsigned long deadline); 950 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 951 extern void ata_port_disable(struct ata_port *); 952 953 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 954 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 955 const struct ata_port_info * const * ppi, int n_ports); 956 extern int ata_slave_link_init(struct ata_port *ap); 957 extern int ata_host_start(struct ata_host *host); 958 extern int ata_host_register(struct ata_host *host, 959 struct scsi_host_template *sht); 960 extern int ata_host_activate(struct ata_host *host, int irq, 961 irq_handler_t irq_handler, unsigned long irq_flags, 962 struct scsi_host_template *sht); 963 extern void ata_host_detach(struct ata_host *host); 964 extern void ata_host_init(struct ata_host *, struct device *, 965 unsigned long, struct ata_port_operations *); 966 extern int ata_scsi_detect(struct scsi_host_template *sht); 967 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 968 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 969 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 970 int cmd, void __user *arg); 971 extern void ata_sas_port_destroy(struct ata_port *); 972 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 973 struct ata_port_info *, struct Scsi_Host *); 974 extern int ata_sas_port_init(struct ata_port *); 975 extern int ata_sas_port_start(struct ata_port *ap); 976 extern void ata_sas_port_stop(struct ata_port *ap); 977 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 978 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 979 struct ata_port *ap); 980 extern int sata_scr_valid(struct ata_link *link); 981 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 982 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 983 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 984 extern bool ata_link_online(struct ata_link *link); 985 extern bool ata_link_offline(struct ata_link *link); 986 #ifdef CONFIG_PM 987 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 988 extern void ata_host_resume(struct ata_host *host); 989 #endif 990 extern int ata_ratelimit(void); 991 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 992 unsigned long interval, unsigned long timeout); 993 extern int atapi_cmd_type(u8 opcode); 994 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 995 u8 pmp, int is_cmd, u8 *fis); 996 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 997 extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 998 unsigned long mwdma_mask, unsigned long udma_mask); 999 extern void ata_unpack_xfermask(unsigned long xfer_mask, 1000 unsigned long *pio_mask, unsigned long *mwdma_mask, 1001 unsigned long *udma_mask); 1002 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 1003 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 1004 extern int ata_xfer_mode2shift(unsigned long xfer_mode); 1005 extern const char *ata_mode_string(unsigned long xfer_mask); 1006 extern unsigned long ata_id_xfermask(const u16 *id); 1007 extern int ata_port_start(struct ata_port *ap); 1008 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1009 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 1010 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1011 unsigned int n_elem); 1012 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1013 extern void ata_dev_disable(struct ata_device *adev); 1014 extern void ata_id_string(const u16 *id, unsigned char *s, 1015 unsigned int ofs, unsigned int len); 1016 extern void ata_id_c_string(const u16 *id, unsigned char *s, 1017 unsigned int ofs, unsigned int len); 1018 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1019 struct ata_taskfile *tf, u16 *id); 1020 extern void ata_qc_complete(struct ata_queued_cmd *qc); 1021 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 1022 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 1023 void (*done)(struct scsi_cmnd *)); 1024 extern int ata_std_bios_param(struct scsi_device *sdev, 1025 struct block_device *bdev, 1026 sector_t capacity, int geom[]); 1027 extern int ata_scsi_slave_config(struct scsi_device *sdev); 1028 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1029 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1030 int queue_depth, int reason); 1031 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1032 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1033 1034 extern int ata_cable_40wire(struct ata_port *ap); 1035 extern int ata_cable_80wire(struct ata_port *ap); 1036 extern int ata_cable_sata(struct ata_port *ap); 1037 extern int ata_cable_ignore(struct ata_port *ap); 1038 extern int ata_cable_unknown(struct ata_port *ap); 1039 1040 extern void ata_pio_queue_task(struct ata_port *ap, void *data, 1041 unsigned long delay); 1042 1043 /* Timing helpers */ 1044 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1045 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1046 extern int ata_timing_compute(struct ata_device *, unsigned short, 1047 struct ata_timing *, int, int); 1048 extern void ata_timing_merge(const struct ata_timing *, 1049 const struct ata_timing *, struct ata_timing *, 1050 unsigned int); 1051 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1052 1053 /* PCI */ 1054 #ifdef CONFIG_PCI 1055 struct pci_dev; 1056 1057 struct pci_bits { 1058 unsigned int reg; /* PCI config register to read */ 1059 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1060 unsigned long mask; 1061 unsigned long val; 1062 }; 1063 1064 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1065 extern void ata_pci_remove_one(struct pci_dev *pdev); 1066 1067 #ifdef CONFIG_PM 1068 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1069 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1070 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1071 extern int ata_pci_device_resume(struct pci_dev *pdev); 1072 #endif /* CONFIG_PM */ 1073 #endif /* CONFIG_PCI */ 1074 1075 /* 1076 * ACPI - drivers/ata/libata-acpi.c 1077 */ 1078 #ifdef CONFIG_ATA_ACPI 1079 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1080 { 1081 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1082 return &ap->__acpi_init_gtm; 1083 return NULL; 1084 } 1085 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1086 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1087 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1088 const struct ata_acpi_gtm *gtm); 1089 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1090 #else 1091 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1092 { 1093 return NULL; 1094 } 1095 1096 static inline int ata_acpi_stm(const struct ata_port *ap, 1097 struct ata_acpi_gtm *stm) 1098 { 1099 return -ENOSYS; 1100 } 1101 1102 static inline int ata_acpi_gtm(const struct ata_port *ap, 1103 struct ata_acpi_gtm *stm) 1104 { 1105 return -ENOSYS; 1106 } 1107 1108 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1109 const struct ata_acpi_gtm *gtm) 1110 { 1111 return 0; 1112 } 1113 1114 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1115 const struct ata_acpi_gtm *gtm) 1116 { 1117 return 0; 1118 } 1119 #endif 1120 1121 /* 1122 * EH - drivers/ata/libata-eh.c 1123 */ 1124 extern void ata_port_schedule_eh(struct ata_port *ap); 1125 extern int ata_link_abort(struct ata_link *link); 1126 extern int ata_port_abort(struct ata_port *ap); 1127 extern int ata_port_freeze(struct ata_port *ap); 1128 extern int sata_async_notification(struct ata_port *ap); 1129 1130 extern void ata_eh_freeze_port(struct ata_port *ap); 1131 extern void ata_eh_thaw_port(struct ata_port *ap); 1132 1133 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1134 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1135 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1136 1137 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1138 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1139 ata_postreset_fn_t postreset); 1140 extern void ata_std_error_handler(struct ata_port *ap); 1141 1142 /* 1143 * Base operations to inherit from and initializers for sht 1144 * 1145 * Operations 1146 * 1147 * base : Common to all libata drivers. 1148 * sata : SATA controllers w/ native interface. 1149 * pmp : SATA controllers w/ PMP support. 1150 * sff : SFF ATA controllers w/o BMDMA support. 1151 * bmdma : SFF ATA controllers w/ BMDMA support. 1152 * 1153 * sht initializers 1154 * 1155 * BASE : Common to all libata drivers. The user must set 1156 * sg_tablesize and dma_boundary. 1157 * PIO : SFF ATA controllers w/ only PIO support. 1158 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1159 * dma_boundary are set to BMDMA limits. 1160 * NCQ : SATA controllers supporting NCQ. The user must set 1161 * sg_tablesize, dma_boundary and can_queue. 1162 */ 1163 extern const struct ata_port_operations ata_base_port_ops; 1164 extern const struct ata_port_operations sata_port_ops; 1165 extern struct device_attribute *ata_common_sdev_attrs[]; 1166 1167 #define ATA_BASE_SHT(drv_name) \ 1168 .module = THIS_MODULE, \ 1169 .name = drv_name, \ 1170 .ioctl = ata_scsi_ioctl, \ 1171 .queuecommand = ata_scsi_queuecmd, \ 1172 .can_queue = ATA_DEF_QUEUE, \ 1173 .this_id = ATA_SHT_THIS_ID, \ 1174 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1175 .emulated = ATA_SHT_EMULATED, \ 1176 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1177 .proc_name = drv_name, \ 1178 .slave_configure = ata_scsi_slave_config, \ 1179 .slave_destroy = ata_scsi_slave_destroy, \ 1180 .bios_param = ata_std_bios_param, \ 1181 .sdev_attrs = ata_common_sdev_attrs 1182 1183 #define ATA_NCQ_SHT(drv_name) \ 1184 ATA_BASE_SHT(drv_name), \ 1185 .change_queue_depth = ata_scsi_change_queue_depth 1186 1187 /* 1188 * PMP helpers 1189 */ 1190 #ifdef CONFIG_SATA_PMP 1191 static inline bool sata_pmp_supported(struct ata_port *ap) 1192 { 1193 return ap->flags & ATA_FLAG_PMP; 1194 } 1195 1196 static inline bool sata_pmp_attached(struct ata_port *ap) 1197 { 1198 return ap->nr_pmp_links != 0; 1199 } 1200 1201 static inline int ata_is_host_link(const struct ata_link *link) 1202 { 1203 return link == &link->ap->link || link == link->ap->slave_link; 1204 } 1205 #else /* CONFIG_SATA_PMP */ 1206 static inline bool sata_pmp_supported(struct ata_port *ap) 1207 { 1208 return false; 1209 } 1210 1211 static inline bool sata_pmp_attached(struct ata_port *ap) 1212 { 1213 return false; 1214 } 1215 1216 static inline int ata_is_host_link(const struct ata_link *link) 1217 { 1218 return 1; 1219 } 1220 #endif /* CONFIG_SATA_PMP */ 1221 1222 static inline int sata_srst_pmp(struct ata_link *link) 1223 { 1224 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1225 return SATA_PMP_CTRL_PORT; 1226 return link->pmp; 1227 } 1228 1229 /* 1230 * printk helpers 1231 */ 1232 #define ata_port_printk(ap, lv, fmt, args...) \ 1233 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) 1234 1235 #define ata_link_printk(link, lv, fmt, args...) do { \ 1236 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ 1237 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ 1238 (link)->pmp , ##args); \ 1239 else \ 1240 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ 1241 } while(0) 1242 1243 #define ata_dev_printk(dev, lv, fmt, args...) \ 1244 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \ 1245 (dev)->link->pmp + (dev)->devno , ##args) 1246 1247 /* 1248 * ata_eh_info helpers 1249 */ 1250 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1251 __attribute__ ((format (printf, 2, 3))); 1252 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 1253 __attribute__ ((format (printf, 2, 3))); 1254 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1255 1256 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1257 { 1258 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1259 ehi->flags |= ATA_EHI_HOTPLUGGED; 1260 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1261 ehi->err_mask |= AC_ERR_ATA_BUS; 1262 } 1263 1264 /* 1265 * port description helpers 1266 */ 1267 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 1268 __attribute__ ((format (printf, 2, 3))); 1269 #ifdef CONFIG_PCI 1270 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1271 const char *name); 1272 #endif 1273 1274 static inline unsigned int ata_tag_valid(unsigned int tag) 1275 { 1276 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1277 } 1278 1279 static inline unsigned int ata_tag_internal(unsigned int tag) 1280 { 1281 return tag == ATA_TAG_INTERNAL; 1282 } 1283 1284 /* 1285 * device helpers 1286 */ 1287 static inline unsigned int ata_class_enabled(unsigned int class) 1288 { 1289 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1290 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1291 } 1292 1293 static inline unsigned int ata_class_disabled(unsigned int class) 1294 { 1295 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1296 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1297 } 1298 1299 static inline unsigned int ata_class_absent(unsigned int class) 1300 { 1301 return !ata_class_enabled(class) && !ata_class_disabled(class); 1302 } 1303 1304 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1305 { 1306 return ata_class_enabled(dev->class); 1307 } 1308 1309 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1310 { 1311 return ata_class_disabled(dev->class); 1312 } 1313 1314 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1315 { 1316 return ata_class_absent(dev->class); 1317 } 1318 1319 /* 1320 * link helpers 1321 */ 1322 static inline int ata_link_max_devices(const struct ata_link *link) 1323 { 1324 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1325 return 2; 1326 return 1; 1327 } 1328 1329 static inline int ata_link_active(struct ata_link *link) 1330 { 1331 return ata_tag_valid(link->active_tag) || link->sactive; 1332 } 1333 1334 /* 1335 * Iterators 1336 * 1337 * ATA_LITER_* constants are used to select link iteration mode and 1338 * ATA_DITER_* device iteration mode. 1339 * 1340 * For a custom iteration directly using ata_{link|dev}_next(), if 1341 * @link or @dev, respectively, is NULL, the first element is 1342 * returned. @dev and @link can be any valid device or link and the 1343 * next element according to the iteration mode will be returned. 1344 * After the last element, NULL is returned. 1345 */ 1346 enum ata_link_iter_mode { 1347 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1348 * host link. no slave link */ 1349 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1350 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1351 * slave link still comes after host link */ 1352 }; 1353 1354 enum ata_dev_iter_mode { 1355 ATA_DITER_ENABLED, 1356 ATA_DITER_ENABLED_REVERSE, 1357 ATA_DITER_ALL, 1358 ATA_DITER_ALL_REVERSE, 1359 }; 1360 1361 extern struct ata_link *ata_link_next(struct ata_link *link, 1362 struct ata_port *ap, 1363 enum ata_link_iter_mode mode); 1364 1365 extern struct ata_device *ata_dev_next(struct ata_device *dev, 1366 struct ata_link *link, 1367 enum ata_dev_iter_mode mode); 1368 1369 /* 1370 * Shortcut notation for iterations 1371 * 1372 * ata_for_each_link() iterates over each link of @ap according to 1373 * @mode. @link points to the current link in the loop. @link is 1374 * NULL after loop termination. ata_for_each_dev() works the same way 1375 * except that it iterates over each device of @link. 1376 * 1377 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1378 * specified when using the following shorthand notations. Only the 1379 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1380 * specified. This not only increases brevity but also makes it 1381 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1382 */ 1383 #define ata_for_each_link(link, ap, mode) \ 1384 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1385 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1386 1387 #define ata_for_each_dev(dev, link, mode) \ 1388 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1389 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1390 1391 /** 1392 * ata_ncq_enabled - Test whether NCQ is enabled 1393 * @dev: ATA device to test for 1394 * 1395 * LOCKING: 1396 * spin_lock_irqsave(host lock) 1397 * 1398 * RETURNS: 1399 * 1 if NCQ is enabled for @dev, 0 otherwise. 1400 */ 1401 static inline int ata_ncq_enabled(struct ata_device *dev) 1402 { 1403 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1404 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1405 } 1406 1407 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1408 { 1409 qc->tf.ctl |= ATA_NIEN; 1410 } 1411 1412 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1413 unsigned int tag) 1414 { 1415 if (likely(ata_tag_valid(tag))) 1416 return &ap->qcmd[tag]; 1417 return NULL; 1418 } 1419 1420 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1421 unsigned int tag) 1422 { 1423 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1424 1425 if (unlikely(!qc) || !ap->ops->error_handler) 1426 return qc; 1427 1428 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1429 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1430 return qc; 1431 1432 return NULL; 1433 } 1434 1435 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1436 { 1437 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1438 } 1439 1440 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1441 { 1442 memset(tf, 0, sizeof(*tf)); 1443 1444 tf->ctl = dev->link->ap->ctl; 1445 if (dev->devno == 0) 1446 tf->device = ATA_DEVICE_OBS; 1447 else 1448 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1449 } 1450 1451 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1452 { 1453 qc->dma_dir = DMA_NONE; 1454 qc->sg = NULL; 1455 qc->flags = 0; 1456 qc->cursg = NULL; 1457 qc->cursg_ofs = 0; 1458 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1459 qc->n_elem = 0; 1460 qc->err_mask = 0; 1461 qc->sect_size = ATA_SECT_SIZE; 1462 1463 ata_tf_init(qc->dev, &qc->tf); 1464 1465 /* init result_tf such that it indicates normal completion */ 1466 qc->result_tf.command = ATA_DRDY; 1467 qc->result_tf.feature = 0; 1468 } 1469 1470 static inline int ata_try_flush_cache(const struct ata_device *dev) 1471 { 1472 return ata_id_wcache_enabled(dev->id) || 1473 ata_id_has_flush(dev->id) || 1474 ata_id_has_flush_ext(dev->id); 1475 } 1476 1477 static inline unsigned int ac_err_mask(u8 status) 1478 { 1479 if (status & (ATA_BUSY | ATA_DRQ)) 1480 return AC_ERR_HSM; 1481 if (status & (ATA_ERR | ATA_DF)) 1482 return AC_ERR_DEV; 1483 return 0; 1484 } 1485 1486 static inline unsigned int __ac_err_mask(u8 status) 1487 { 1488 unsigned int mask = ac_err_mask(status); 1489 if (mask == 0) 1490 return AC_ERR_OTHER; 1491 return mask; 1492 } 1493 1494 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1495 { 1496 return *(struct ata_port **)&host->hostdata[0]; 1497 } 1498 1499 static inline int ata_check_ready(u8 status) 1500 { 1501 if (!(status & ATA_BUSY)) 1502 return 1; 1503 1504 /* 0xff indicates either no device or device not ready */ 1505 if (status == 0xff) 1506 return -ENODEV; 1507 1508 return 0; 1509 } 1510 1511 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1512 unsigned long timeout_msecs) 1513 { 1514 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1515 } 1516 1517 /* Don't open code these in drivers as there are traps. Firstly the range may 1518 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1519 > UDMA_0. Dyma ddreigiau */ 1520 1521 static inline int ata_using_mwdma(struct ata_device *adev) 1522 { 1523 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1524 return 1; 1525 return 0; 1526 } 1527 1528 static inline int ata_using_udma(struct ata_device *adev) 1529 { 1530 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1531 return 1; 1532 return 0; 1533 } 1534 1535 static inline int ata_dma_enabled(struct ata_device *adev) 1536 { 1537 return (adev->dma_mode == 0xFF ? 0 : 1); 1538 } 1539 1540 /************************************************************************** 1541 * PMP - drivers/ata/libata-pmp.c 1542 */ 1543 #ifdef CONFIG_SATA_PMP 1544 1545 extern const struct ata_port_operations sata_pmp_port_ops; 1546 1547 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1548 extern void sata_pmp_error_handler(struct ata_port *ap); 1549 1550 #else /* CONFIG_SATA_PMP */ 1551 1552 #define sata_pmp_port_ops sata_port_ops 1553 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1554 #define sata_pmp_error_handler ata_std_error_handler 1555 1556 #endif /* CONFIG_SATA_PMP */ 1557 1558 1559 /************************************************************************** 1560 * SFF - drivers/ata/libata-sff.c 1561 */ 1562 #ifdef CONFIG_ATA_SFF 1563 1564 extern const struct ata_port_operations ata_sff_port_ops; 1565 extern const struct ata_port_operations ata_bmdma_port_ops; 1566 extern const struct ata_port_operations ata_bmdma32_port_ops; 1567 1568 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1569 #define ATA_PIO_SHT(drv_name) \ 1570 ATA_BASE_SHT(drv_name), \ 1571 .sg_tablesize = LIBATA_MAX_PRD, \ 1572 .dma_boundary = ATA_DMA_BOUNDARY 1573 1574 #define ATA_BMDMA_SHT(drv_name) \ 1575 ATA_BASE_SHT(drv_name), \ 1576 .sg_tablesize = LIBATA_MAX_PRD, \ 1577 .dma_boundary = ATA_DMA_BOUNDARY 1578 1579 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc); 1580 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc); 1581 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1582 extern u8 ata_sff_check_status(struct ata_port *ap); 1583 extern void ata_sff_pause(struct ata_port *ap); 1584 extern void ata_sff_dma_pause(struct ata_port *ap); 1585 extern int ata_sff_busy_sleep(struct ata_port *ap, 1586 unsigned long timeout_pat, unsigned long timeout); 1587 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1588 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1589 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1590 extern void ata_sff_exec_command(struct ata_port *ap, 1591 const struct ata_taskfile *tf); 1592 extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1593 unsigned char *buf, unsigned int buflen, int rw); 1594 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1595 unsigned char *buf, unsigned int buflen, int rw); 1596 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1597 unsigned char *buf, unsigned int buflen, int rw); 1598 extern u8 ata_sff_irq_on(struct ata_port *ap); 1599 extern void ata_sff_irq_clear(struct ata_port *ap); 1600 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1601 u8 status, int in_wq); 1602 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1603 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1604 extern unsigned int ata_sff_host_intr(struct ata_port *ap, 1605 struct ata_queued_cmd *qc); 1606 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1607 extern void ata_sff_lost_interrupt(struct ata_port *ap); 1608 extern void ata_sff_freeze(struct ata_port *ap); 1609 extern void ata_sff_thaw(struct ata_port *ap); 1610 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1611 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1612 u8 *r_err); 1613 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1614 unsigned long deadline); 1615 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1616 unsigned long deadline); 1617 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1618 unsigned long deadline); 1619 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1620 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1621 extern void ata_sff_error_handler(struct ata_port *ap); 1622 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc); 1623 extern int ata_sff_port_start(struct ata_port *ap); 1624 extern int ata_sff_port_start32(struct ata_port *ap); 1625 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1626 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev, 1627 unsigned long xfer_mask); 1628 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1629 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1630 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1631 extern u8 ata_bmdma_status(struct ata_port *ap); 1632 extern void ata_bus_reset(struct ata_port *ap); 1633 1634 #ifdef CONFIG_PCI 1635 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1636 extern int ata_pci_bmdma_init(struct ata_host *host); 1637 extern int ata_pci_sff_init_host(struct ata_host *host); 1638 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1639 const struct ata_port_info * const * ppi, 1640 struct ata_host **r_host); 1641 extern int ata_pci_sff_activate_host(struct ata_host *host, 1642 irq_handler_t irq_handler, 1643 struct scsi_host_template *sht); 1644 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1645 const struct ata_port_info * const * ppi, 1646 struct scsi_host_template *sht, void *host_priv); 1647 #endif /* CONFIG_PCI */ 1648 1649 /** 1650 * ata_sff_busy_wait - Wait for a port status register 1651 * @ap: Port to wait for. 1652 * @bits: bits that must be clear 1653 * @max: number of 10uS waits to perform 1654 * 1655 * Waits up to max*10 microseconds for the selected bits in the port's 1656 * status register to be cleared. 1657 * Returns final value of status register. 1658 * 1659 * LOCKING: 1660 * Inherited from caller. 1661 */ 1662 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1663 unsigned int max) 1664 { 1665 u8 status; 1666 1667 do { 1668 udelay(10); 1669 status = ap->ops->sff_check_status(ap); 1670 max--; 1671 } while (status != 0xff && (status & bits) && (max > 0)); 1672 1673 return status; 1674 } 1675 1676 /** 1677 * ata_wait_idle - Wait for a port to be idle. 1678 * @ap: Port to wait for. 1679 * 1680 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1681 * Returns final value of status register. 1682 * 1683 * LOCKING: 1684 * Inherited from caller. 1685 */ 1686 static inline u8 ata_wait_idle(struct ata_port *ap) 1687 { 1688 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1689 1690 #ifdef ATA_DEBUG 1691 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1692 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1693 status); 1694 #endif 1695 1696 return status; 1697 } 1698 #endif /* CONFIG_ATA_SFF */ 1699 1700 #endif /* __LINUX_LIBATA_H__ */ 1701