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