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 #include <linux/sched.h> 41 42 /* 43 * Define if arch has non-standard setup. This is a _PCI_ standard 44 * not a legacy or ISA standard. 45 */ 46 #ifdef CONFIG_ATA_NONSTANDARD 47 #include <asm/libata-portmap.h> 48 #else 49 #include <asm-generic/libata-portmap.h> 50 #endif 51 52 /* 53 * compile-time options: to be removed as soon as all the drivers are 54 * converted to the new debugging mechanism 55 */ 56 #undef ATA_DEBUG /* debugging output */ 57 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 58 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 59 #undef ATA_NDEBUG /* define to disable quick runtime checks */ 60 61 62 /* note: prints function name for you */ 63 #ifdef ATA_DEBUG 64 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) 65 #ifdef ATA_VERBOSE_DEBUG 66 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) 67 #else 68 #define VPRINTK(fmt, args...) 69 #endif /* ATA_VERBOSE_DEBUG */ 70 #else 71 #define DPRINTK(fmt, args...) 72 #define VPRINTK(fmt, args...) 73 #endif /* ATA_DEBUG */ 74 75 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args) 76 77 #define ata_print_version_once(dev, version) \ 78 ({ \ 79 static bool __print_once; \ 80 \ 81 if (!__print_once) { \ 82 __print_once = true; \ 83 ata_print_version(dev, version); \ 84 } \ 85 }) 86 87 /* NEW: debug levels */ 88 #define HAVE_LIBATA_MSG 1 89 90 enum { 91 ATA_MSG_DRV = 0x0001, 92 ATA_MSG_INFO = 0x0002, 93 ATA_MSG_PROBE = 0x0004, 94 ATA_MSG_WARN = 0x0008, 95 ATA_MSG_MALLOC = 0x0010, 96 ATA_MSG_CTL = 0x0020, 97 ATA_MSG_INTR = 0x0040, 98 ATA_MSG_ERR = 0x0080, 99 }; 100 101 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 102 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 103 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 104 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 105 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 106 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 107 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 108 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 109 110 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 111 { 112 if (dval < 0 || dval >= (sizeof(u32) * 8)) 113 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 114 if (!dval) 115 return 0; 116 return (1 << dval) - 1; 117 } 118 119 /* defines only for the constants which don't work well as enums */ 120 #define ATA_TAG_POISON 0xfafbfcfdU 121 122 enum { 123 /* various global constants */ 124 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 125 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ 126 ATA_DEF_QUEUE = 1, 127 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 128 ATA_MAX_QUEUE = 32, 129 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 130 ATA_SHORT_PAUSE = 16, 131 132 ATAPI_MAX_DRAIN = 16 << 10, 133 134 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1, 135 136 ATA_SHT_EMULATED = 1, 137 ATA_SHT_CMD_PER_LUN = 1, 138 ATA_SHT_THIS_ID = -1, 139 ATA_SHT_USE_CLUSTERING = 1, 140 141 /* struct ata_device stuff */ 142 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 143 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 144 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 145 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 146 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 147 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 148 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 149 ATA_DFLAG_AN = (1 << 7), /* AN configured */ 150 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */ 151 ATA_DFLAG_CFG_MASK = (1 << 12) - 1, 152 153 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */ 154 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */ 155 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */ 156 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */ 157 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */ 158 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */ 159 ATA_DFLAG_INIT_MASK = (1 << 24) - 1, 160 161 ATA_DFLAG_DETACH = (1 << 24), 162 ATA_DFLAG_DETACHED = (1 << 25), 163 164 ATA_DEV_UNKNOWN = 0, /* unknown device */ 165 ATA_DEV_ATA = 1, /* ATA device */ 166 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 167 ATA_DEV_ATAPI = 3, /* ATAPI device */ 168 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 169 ATA_DEV_PMP = 5, /* SATA port multiplier */ 170 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 171 ATA_DEV_SEMB = 7, /* SEMB */ 172 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 173 ATA_DEV_NONE = 9, /* no device */ 174 175 /* struct ata_link flags */ 176 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ 177 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ 178 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ 179 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ 180 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 181 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 182 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 183 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */ 184 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */ 185 186 /* struct ata_port flags */ 187 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 188 /* (doesn't imply presence) */ 189 ATA_FLAG_SATA = (1 << 1), 190 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 191 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 192 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 193 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 194 * doesn't handle PIO interrupts */ 195 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 196 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ 197 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ 198 ATA_FLAG_DEBUGMSG = (1 << 13), 199 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */ 200 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 201 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 202 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 203 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 204 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 205 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 206 * management */ 207 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 208 * led */ 209 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */ 210 211 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 212 213 214 /* struct ata_port pflags */ 215 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 216 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 217 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 218 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 219 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 220 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 221 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 222 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 223 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 224 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 225 226 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 227 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 228 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 229 230 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 231 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 232 233 /* struct ata_queued_cmd flags */ 234 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 235 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 236 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 237 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 238 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 239 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 240 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 241 242 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 243 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 244 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 245 246 /* host set flags */ 247 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 248 ATA_HOST_STARTED = (1 << 1), /* Host started */ 249 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 250 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */ 251 252 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 253 254 /* various lengths of time */ 255 ATA_TMOUT_BOOT = 30000, /* heuristic */ 256 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 257 ATA_TMOUT_INTERNAL_QUICK = 5000, 258 ATA_TMOUT_MAX_PARK = 30000, 259 260 /* 261 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s 262 * is too much without parallel probing. Use 2s if parallel 263 * probing is available, 800ms otherwise. 264 */ 265 ATA_TMOUT_FF_WAIT_LONG = 2000, 266 ATA_TMOUT_FF_WAIT = 800, 267 268 /* Spec mandates to wait for ">= 2ms" before checking status 269 * after reset. We wait 150ms, because that was the magic 270 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 271 * the period of time between when the ATA command register is 272 * written, and then status is checked. Because waiting for 273 * "a while" before checking status is fine, post SRST, we 274 * perform this magic delay here as well. 275 * 276 * Old drivers/ide uses the 2mS rule and then waits for ready. 277 */ 278 ATA_WAIT_AFTER_RESET = 150, 279 280 /* If PMP is supported, we have to do follow-up SRST. As some 281 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 282 * advised to wait only for the following duration before 283 * doing SRST. 284 */ 285 ATA_TMOUT_PMP_SRST_WAIT = 5000, 286 287 /* ATA bus states */ 288 BUS_UNKNOWN = 0, 289 BUS_DMA = 1, 290 BUS_IDLE = 2, 291 BUS_NOINTR = 3, 292 BUS_NODATA = 4, 293 BUS_TIMER = 5, 294 BUS_PIO = 6, 295 BUS_EDD = 7, 296 BUS_IDENTIFY = 8, 297 BUS_PACKET = 9, 298 299 /* SATA port states */ 300 PORT_UNKNOWN = 0, 301 PORT_ENABLED = 1, 302 PORT_DISABLED = 2, 303 304 /* encoding various smaller bitmaps into a single 305 * unsigned long bitmap 306 */ 307 ATA_NR_PIO_MODES = 7, 308 ATA_NR_MWDMA_MODES = 5, 309 ATA_NR_UDMA_MODES = 8, 310 311 ATA_SHIFT_PIO = 0, 312 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 313 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 314 315 /* size of buffer to pad xfers ending on unaligned boundaries */ 316 ATA_DMA_PAD_SZ = 4, 317 318 /* ering size */ 319 ATA_ERING_SIZE = 32, 320 321 /* return values for ->qc_defer */ 322 ATA_DEFER_LINK = 1, 323 ATA_DEFER_PORT = 2, 324 325 /* desc_len for ata_eh_info and context */ 326 ATA_EH_DESC_LEN = 80, 327 328 /* reset / recovery action types */ 329 ATA_EH_REVALIDATE = (1 << 0), 330 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 331 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 332 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 333 ATA_EH_ENABLE_LINK = (1 << 3), 334 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 335 336 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 337 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 338 ATA_EH_ENABLE_LINK, 339 340 /* ata_eh_info->flags */ 341 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 342 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 343 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 344 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */ 345 346 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 347 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 348 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 349 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 350 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */ 351 352 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 353 354 /* mask of flags to transfer *to* the slave link */ 355 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 356 357 /* max tries if error condition is still set after ->error_handler */ 358 ATA_EH_MAX_TRIES = 5, 359 360 /* sometimes resuming a link requires several retries */ 361 ATA_LINK_RESUME_TRIES = 5, 362 363 /* how hard are we gonna try to probe/recover devices */ 364 ATA_PROBE_MAX_TRIES = 3, 365 ATA_EH_DEV_TRIES = 3, 366 ATA_EH_PMP_TRIES = 5, 367 ATA_EH_PMP_LINK_TRIES = 3, 368 369 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 370 371 /* This should match the actual table size of 372 * ata_eh_cmd_timeout_table in libata-eh.c. 373 */ 374 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6, 375 376 /* Horkage types. May be set by libata or controller on drives 377 (some horkage may be drive/controller pair dependent */ 378 379 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 380 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 381 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 382 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 383 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 384 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 385 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 386 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 387 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 388 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 389 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 390 not multiple of 16 bytes */ 391 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */ 392 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 393 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ 394 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ 395 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */ 396 397 /* DMA mask for user DMA control: User visible values; DO NOT 398 renumber */ 399 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 400 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 401 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 402 403 /* ATAPI command types */ 404 ATAPI_READ = 0, /* READs */ 405 ATAPI_WRITE = 1, /* WRITEs */ 406 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 407 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 408 ATAPI_MISC = 4, /* the rest */ 409 410 /* Timing constants */ 411 ATA_TIMING_SETUP = (1 << 0), 412 ATA_TIMING_ACT8B = (1 << 1), 413 ATA_TIMING_REC8B = (1 << 2), 414 ATA_TIMING_CYC8B = (1 << 3), 415 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 416 ATA_TIMING_CYC8B, 417 ATA_TIMING_ACTIVE = (1 << 4), 418 ATA_TIMING_RECOVER = (1 << 5), 419 ATA_TIMING_DMACK_HOLD = (1 << 6), 420 ATA_TIMING_CYCLE = (1 << 7), 421 ATA_TIMING_UDMA = (1 << 8), 422 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 423 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 424 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 425 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 426 ATA_TIMING_UDMA, 427 428 /* ACPI constants */ 429 ATA_ACPI_FILTER_SETXFER = 1 << 0, 430 ATA_ACPI_FILTER_LOCK = 1 << 1, 431 ATA_ACPI_FILTER_DIPM = 1 << 2, 432 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 433 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 434 435 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 436 ATA_ACPI_FILTER_LOCK | 437 ATA_ACPI_FILTER_DIPM, 438 }; 439 440 enum ata_xfer_mask { 441 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 442 << ATA_SHIFT_PIO, 443 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 444 << ATA_SHIFT_MWDMA, 445 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 446 << ATA_SHIFT_UDMA, 447 }; 448 449 enum hsm_task_states { 450 HSM_ST_IDLE, /* no command on going */ 451 HSM_ST_FIRST, /* (waiting the device to) 452 write CDB or first data block */ 453 HSM_ST, /* (waiting the device to) transfer data */ 454 HSM_ST_LAST, /* (waiting the device to) complete command */ 455 HSM_ST_ERR, /* error */ 456 }; 457 458 enum ata_completion_errors { 459 AC_ERR_DEV = (1 << 0), /* device reported error */ 460 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 461 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 462 AC_ERR_MEDIA = (1 << 3), /* media error */ 463 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 464 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 465 AC_ERR_SYSTEM = (1 << 6), /* system error */ 466 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 467 AC_ERR_OTHER = (1 << 8), /* unknown */ 468 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 469 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 470 }; 471 472 /* 473 * Link power management policy: If you alter this, you also need to 474 * alter libata-scsi.c (for the ascii descriptions) 475 */ 476 enum ata_lpm_policy { 477 ATA_LPM_UNKNOWN, 478 ATA_LPM_MAX_POWER, 479 ATA_LPM_MED_POWER, 480 ATA_LPM_MIN_POWER, 481 }; 482 483 enum ata_lpm_hints { 484 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */ 485 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */ 486 }; 487 488 /* forward declarations */ 489 struct scsi_device; 490 struct ata_port_operations; 491 struct ata_port; 492 struct ata_link; 493 struct ata_queued_cmd; 494 495 /* typedefs */ 496 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 497 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 498 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 499 unsigned long deadline); 500 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 501 502 extern struct device_attribute dev_attr_link_power_management_policy; 503 extern struct device_attribute dev_attr_unload_heads; 504 extern struct device_attribute dev_attr_em_message_type; 505 extern struct device_attribute dev_attr_em_message; 506 extern struct device_attribute dev_attr_sw_activity; 507 508 enum sw_activity { 509 OFF, 510 BLINK_ON, 511 BLINK_OFF, 512 }; 513 514 #ifdef CONFIG_ATA_SFF 515 struct ata_ioports { 516 void __iomem *cmd_addr; 517 void __iomem *data_addr; 518 void __iomem *error_addr; 519 void __iomem *feature_addr; 520 void __iomem *nsect_addr; 521 void __iomem *lbal_addr; 522 void __iomem *lbam_addr; 523 void __iomem *lbah_addr; 524 void __iomem *device_addr; 525 void __iomem *status_addr; 526 void __iomem *command_addr; 527 void __iomem *altstatus_addr; 528 void __iomem *ctl_addr; 529 #ifdef CONFIG_ATA_BMDMA 530 void __iomem *bmdma_addr; 531 #endif /* CONFIG_ATA_BMDMA */ 532 void __iomem *scr_addr; 533 }; 534 #endif /* CONFIG_ATA_SFF */ 535 536 struct ata_host { 537 spinlock_t lock; 538 struct device *dev; 539 void __iomem * const *iomap; 540 unsigned int n_ports; 541 void *private_data; 542 struct ata_port_operations *ops; 543 unsigned long flags; 544 545 struct mutex eh_mutex; 546 struct task_struct *eh_owner; 547 548 #ifdef CONFIG_ATA_ACPI 549 acpi_handle acpi_handle; 550 #endif 551 struct ata_port *simplex_claimed; /* channel owning the DMA */ 552 struct ata_port *ports[0]; 553 }; 554 555 struct ata_queued_cmd { 556 struct ata_port *ap; 557 struct ata_device *dev; 558 559 struct scsi_cmnd *scsicmd; 560 void (*scsidone)(struct scsi_cmnd *); 561 562 struct ata_taskfile tf; 563 u8 cdb[ATAPI_CDB_LEN]; 564 565 unsigned long flags; /* ATA_QCFLAG_xxx */ 566 unsigned int tag; 567 unsigned int n_elem; 568 unsigned int orig_n_elem; 569 570 int dma_dir; 571 572 unsigned int sect_size; 573 574 unsigned int nbytes; 575 unsigned int extrabytes; 576 unsigned int curbytes; 577 578 struct scatterlist sgent; 579 580 struct scatterlist *sg; 581 582 struct scatterlist *cursg; 583 unsigned int cursg_ofs; 584 585 unsigned int err_mask; 586 struct ata_taskfile result_tf; 587 ata_qc_cb_t complete_fn; 588 589 void *private_data; 590 void *lldd_task; 591 }; 592 593 struct ata_port_stats { 594 unsigned long unhandled_irq; 595 unsigned long idle_irq; 596 unsigned long rw_reqbuf; 597 }; 598 599 struct ata_ering_entry { 600 unsigned int eflags; 601 unsigned int err_mask; 602 u64 timestamp; 603 }; 604 605 struct ata_ering { 606 int cursor; 607 struct ata_ering_entry ring[ATA_ERING_SIZE]; 608 }; 609 610 struct ata_device { 611 struct ata_link *link; 612 unsigned int devno; /* 0 or 1 */ 613 unsigned int horkage; /* List of broken features */ 614 unsigned long flags; /* ATA_DFLAG_xxx */ 615 struct scsi_device *sdev; /* attached SCSI device */ 616 void *private_data; 617 #ifdef CONFIG_ATA_ACPI 618 acpi_handle acpi_handle; 619 union acpi_object *gtf_cache; 620 unsigned int gtf_filter; 621 #endif 622 struct device tdev; 623 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 624 u64 n_sectors; /* size of device, if ATA */ 625 u64 n_native_sectors; /* native size, if ATA */ 626 unsigned int class; /* ATA_DEV_xxx */ 627 unsigned long unpark_deadline; 628 629 u8 pio_mode; 630 u8 dma_mode; 631 u8 xfer_mode; 632 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 633 634 unsigned int multi_count; /* sectors count for 635 READ/WRITE MULTIPLE */ 636 unsigned int max_sectors; /* per-device max sectors */ 637 unsigned int cdb_len; 638 639 /* per-dev xfer mask */ 640 unsigned long pio_mask; 641 unsigned long mwdma_mask; 642 unsigned long udma_mask; 643 644 /* for CHS addressing */ 645 u16 cylinders; /* Number of cylinders */ 646 u16 heads; /* Number of heads */ 647 u16 sectors; /* Number of sectors per track */ 648 649 union { 650 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 651 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 652 }; 653 654 /* error history */ 655 int spdn_cnt; 656 /* ering is CLEAR_END, read comment above CLEAR_END */ 657 struct ata_ering ering; 658 }; 659 660 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 661 * cleared to zero on ata_dev_init(). 662 */ 663 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 664 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 665 666 struct ata_eh_info { 667 struct ata_device *dev; /* offending device */ 668 u32 serror; /* SError from LLDD */ 669 unsigned int err_mask; /* port-wide err_mask */ 670 unsigned int action; /* ATA_EH_* action mask */ 671 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 672 unsigned int flags; /* ATA_EHI_* flags */ 673 674 unsigned int probe_mask; 675 676 char desc[ATA_EH_DESC_LEN]; 677 int desc_len; 678 }; 679 680 struct ata_eh_context { 681 struct ata_eh_info i; 682 int tries[ATA_MAX_DEVICES]; 683 int cmd_timeout_idx[ATA_MAX_DEVICES] 684 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 685 unsigned int classes[ATA_MAX_DEVICES]; 686 unsigned int did_probe_mask; 687 unsigned int unloaded_mask; 688 unsigned int saved_ncq_enabled; 689 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 690 /* timestamp for the last reset attempt or success */ 691 unsigned long last_reset; 692 }; 693 694 struct ata_acpi_drive 695 { 696 u32 pio; 697 u32 dma; 698 } __packed; 699 700 struct ata_acpi_gtm { 701 struct ata_acpi_drive drive[2]; 702 u32 flags; 703 } __packed; 704 705 struct ata_link { 706 struct ata_port *ap; 707 int pmp; /* port multiplier port # */ 708 709 struct device tdev; 710 unsigned int active_tag; /* active tag on this link */ 711 u32 sactive; /* active NCQ commands */ 712 713 unsigned int flags; /* ATA_LFLAG_xxx */ 714 715 u32 saved_scontrol; /* SControl on probe */ 716 unsigned int hw_sata_spd_limit; 717 unsigned int sata_spd_limit; 718 unsigned int sata_spd; /* current SATA PHY speed */ 719 enum ata_lpm_policy lpm_policy; 720 721 /* record runtime error info, protected by host_set lock */ 722 struct ata_eh_info eh_info; 723 /* EH context */ 724 struct ata_eh_context eh_context; 725 726 struct ata_device device[ATA_MAX_DEVICES]; 727 }; 728 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag) 729 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0]) 730 731 struct ata_port { 732 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 733 struct ata_port_operations *ops; 734 spinlock_t *lock; 735 /* Flags owned by the EH context. Only EH should touch these once the 736 port is active */ 737 unsigned long flags; /* ATA_FLAG_xxx */ 738 /* Flags that change dynamically, protected by ap->lock */ 739 unsigned int pflags; /* ATA_PFLAG_xxx */ 740 unsigned int print_id; /* user visible unique port ID */ 741 unsigned int port_no; /* 0 based port no. inside the host */ 742 743 #ifdef CONFIG_ATA_SFF 744 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 745 u8 ctl; /* cache of ATA control register */ 746 u8 last_ctl; /* Cache last written value */ 747 struct ata_link* sff_pio_task_link; /* link currently used */ 748 struct delayed_work sff_pio_task; 749 #ifdef CONFIG_ATA_BMDMA 750 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */ 751 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */ 752 #endif /* CONFIG_ATA_BMDMA */ 753 #endif /* CONFIG_ATA_SFF */ 754 755 unsigned int pio_mask; 756 unsigned int mwdma_mask; 757 unsigned int udma_mask; 758 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 759 760 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 761 unsigned long qc_allocated; 762 unsigned int qc_active; 763 int nr_active_links; /* #links with active qcs */ 764 765 struct ata_link link; /* host default link */ 766 struct ata_link *slave_link; /* see ata_slave_link_init() */ 767 768 int nr_pmp_links; /* nr of available PMP links */ 769 struct ata_link *pmp_link; /* array of PMP links */ 770 struct ata_link *excl_link; /* for PMP qc exclusion */ 771 772 struct ata_port_stats stats; 773 struct ata_host *host; 774 struct device *dev; 775 struct device tdev; 776 777 struct mutex scsi_scan_mutex; 778 struct delayed_work hotplug_task; 779 struct work_struct scsi_rescan_task; 780 781 unsigned int hsm_task_state; 782 783 u32 msg_enable; 784 struct list_head eh_done_q; 785 wait_queue_head_t eh_wait_q; 786 int eh_tries; 787 struct completion park_req_pending; 788 789 pm_message_t pm_mesg; 790 int *pm_result; 791 enum ata_lpm_policy target_lpm_policy; 792 793 struct timer_list fastdrain_timer; 794 unsigned long fastdrain_cnt; 795 796 int em_message_type; 797 void *private_data; 798 799 #ifdef CONFIG_ATA_ACPI 800 acpi_handle acpi_handle; 801 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 802 #endif 803 /* owned by EH */ 804 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 805 }; 806 807 /* The following initializer overrides a method to NULL whether one of 808 * its parent has the method defined or not. This is equivalent to 809 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 810 * expression and thus can't be used as an initializer. 811 */ 812 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 813 814 struct ata_port_operations { 815 /* 816 * Command execution 817 */ 818 int (*qc_defer)(struct ata_queued_cmd *qc); 819 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 820 void (*qc_prep)(struct ata_queued_cmd *qc); 821 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 822 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 823 824 /* 825 * Configuration and exception handling 826 */ 827 int (*cable_detect)(struct ata_port *ap); 828 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 829 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 830 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 831 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 832 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 833 834 void (*dev_config)(struct ata_device *dev); 835 836 void (*freeze)(struct ata_port *ap); 837 void (*thaw)(struct ata_port *ap); 838 ata_prereset_fn_t prereset; 839 ata_reset_fn_t softreset; 840 ata_reset_fn_t hardreset; 841 ata_postreset_fn_t postreset; 842 ata_prereset_fn_t pmp_prereset; 843 ata_reset_fn_t pmp_softreset; 844 ata_reset_fn_t pmp_hardreset; 845 ata_postreset_fn_t pmp_postreset; 846 void (*error_handler)(struct ata_port *ap); 847 void (*lost_interrupt)(struct ata_port *ap); 848 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 849 850 /* 851 * Optional features 852 */ 853 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 854 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 855 void (*pmp_attach)(struct ata_port *ap); 856 void (*pmp_detach)(struct ata_port *ap); 857 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy, 858 unsigned hints); 859 860 /* 861 * Start, stop, suspend and resume 862 */ 863 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 864 int (*port_resume)(struct ata_port *ap); 865 int (*port_start)(struct ata_port *ap); 866 void (*port_stop)(struct ata_port *ap); 867 void (*host_stop)(struct ata_host *host); 868 869 #ifdef CONFIG_ATA_SFF 870 /* 871 * SFF / taskfile oriented ops 872 */ 873 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 874 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl); 875 u8 (*sff_check_status)(struct ata_port *ap); 876 u8 (*sff_check_altstatus)(struct ata_port *ap); 877 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 878 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 879 void (*sff_exec_command)(struct ata_port *ap, 880 const struct ata_taskfile *tf); 881 unsigned int (*sff_data_xfer)(struct ata_device *dev, 882 unsigned char *buf, unsigned int buflen, int rw); 883 void (*sff_irq_on)(struct ata_port *); 884 bool (*sff_irq_check)(struct ata_port *); 885 void (*sff_irq_clear)(struct ata_port *); 886 void (*sff_drain_fifo)(struct ata_queued_cmd *qc); 887 888 #ifdef CONFIG_ATA_BMDMA 889 void (*bmdma_setup)(struct ata_queued_cmd *qc); 890 void (*bmdma_start)(struct ata_queued_cmd *qc); 891 void (*bmdma_stop)(struct ata_queued_cmd *qc); 892 u8 (*bmdma_status)(struct ata_port *ap); 893 #endif /* CONFIG_ATA_BMDMA */ 894 #endif /* CONFIG_ATA_SFF */ 895 896 ssize_t (*em_show)(struct ata_port *ap, char *buf); 897 ssize_t (*em_store)(struct ata_port *ap, const char *message, 898 size_t size); 899 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 900 ssize_t (*sw_activity_store)(struct ata_device *dev, 901 enum sw_activity val); 902 /* 903 * Obsolete 904 */ 905 void (*phy_reset)(struct ata_port *ap); 906 void (*eng_timeout)(struct ata_port *ap); 907 908 /* 909 * ->inherits must be the last field and all the preceding 910 * fields must be pointers. 911 */ 912 const struct ata_port_operations *inherits; 913 }; 914 915 struct ata_port_info { 916 unsigned long flags; 917 unsigned long link_flags; 918 unsigned long pio_mask; 919 unsigned long mwdma_mask; 920 unsigned long udma_mask; 921 struct ata_port_operations *port_ops; 922 void *private_data; 923 }; 924 925 struct ata_timing { 926 unsigned short mode; /* ATA mode */ 927 unsigned short setup; /* t1 */ 928 unsigned short act8b; /* t2 for 8-bit I/O */ 929 unsigned short rec8b; /* t2i for 8-bit I/O */ 930 unsigned short cyc8b; /* t0 for 8-bit I/O */ 931 unsigned short active; /* t2 or tD */ 932 unsigned short recover; /* t2i or tK */ 933 unsigned short dmack_hold; /* tj */ 934 unsigned short cycle; /* t0 */ 935 unsigned short udma; /* t2CYCTYP/2 */ 936 }; 937 938 /* 939 * Core layer - drivers/ata/libata-core.c 940 */ 941 extern const unsigned long sata_deb_timing_normal[]; 942 extern const unsigned long sata_deb_timing_hotplug[]; 943 extern const unsigned long sata_deb_timing_long[]; 944 945 extern struct ata_port_operations ata_dummy_port_ops; 946 extern const struct ata_port_info ata_dummy_port_info; 947 948 static inline const unsigned long * 949 sata_ehc_deb_timing(struct ata_eh_context *ehc) 950 { 951 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 952 return sata_deb_timing_hotplug; 953 else 954 return sata_deb_timing_normal; 955 } 956 957 static inline int ata_port_is_dummy(struct ata_port *ap) 958 { 959 return ap->ops == &ata_dummy_port_ops; 960 } 961 962 extern int sata_set_spd(struct ata_link *link); 963 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 964 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 965 int (*check_ready)(struct ata_link *link)); 966 extern int sata_link_debounce(struct ata_link *link, 967 const unsigned long *params, unsigned long deadline); 968 extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 969 unsigned long deadline); 970 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, 971 bool spm_wakeup); 972 extern int sata_link_hardreset(struct ata_link *link, 973 const unsigned long *timing, unsigned long deadline, 974 bool *online, int (*check_ready)(struct ata_link *)); 975 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 976 unsigned long deadline); 977 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 978 979 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 980 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 981 const struct ata_port_info * const * ppi, int n_ports); 982 extern int ata_slave_link_init(struct ata_port *ap); 983 extern int ata_host_start(struct ata_host *host); 984 extern int ata_host_register(struct ata_host *host, 985 struct scsi_host_template *sht); 986 extern int ata_host_activate(struct ata_host *host, int irq, 987 irq_handler_t irq_handler, unsigned long irq_flags, 988 struct scsi_host_template *sht); 989 extern void ata_host_detach(struct ata_host *host); 990 extern void ata_host_init(struct ata_host *, struct device *, 991 unsigned long, struct ata_port_operations *); 992 extern int ata_scsi_detect(struct scsi_host_template *sht); 993 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 994 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd); 995 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 996 int cmd, void __user *arg); 997 extern void ata_sas_port_destroy(struct ata_port *); 998 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 999 struct ata_port_info *, struct Scsi_Host *); 1000 extern void ata_sas_async_probe(struct ata_port *ap); 1001 extern int ata_sas_sync_probe(struct ata_port *ap); 1002 extern int ata_sas_port_init(struct ata_port *); 1003 extern int ata_sas_port_start(struct ata_port *ap); 1004 extern void ata_sas_port_stop(struct ata_port *ap); 1005 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 1006 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap); 1007 extern int sata_scr_valid(struct ata_link *link); 1008 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 1009 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 1010 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 1011 extern bool ata_link_online(struct ata_link *link); 1012 extern bool ata_link_offline(struct ata_link *link); 1013 #ifdef CONFIG_PM 1014 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 1015 extern void ata_host_resume(struct ata_host *host); 1016 #endif 1017 extern int ata_ratelimit(void); 1018 extern void ata_msleep(struct ata_port *ap, unsigned int msecs); 1019 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, 1020 u32 val, unsigned long interval, unsigned long timeout); 1021 extern int atapi_cmd_type(u8 opcode); 1022 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 1023 u8 pmp, int is_cmd, u8 *fis); 1024 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 1025 extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 1026 unsigned long mwdma_mask, unsigned long udma_mask); 1027 extern void ata_unpack_xfermask(unsigned long xfer_mask, 1028 unsigned long *pio_mask, unsigned long *mwdma_mask, 1029 unsigned long *udma_mask); 1030 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 1031 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 1032 extern int ata_xfer_mode2shift(unsigned long xfer_mode); 1033 extern const char *ata_mode_string(unsigned long xfer_mask); 1034 extern unsigned long ata_id_xfermask(const u16 *id); 1035 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1036 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 1037 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1038 unsigned int n_elem); 1039 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1040 extern void ata_dev_disable(struct ata_device *adev); 1041 extern void ata_id_string(const u16 *id, unsigned char *s, 1042 unsigned int ofs, unsigned int len); 1043 extern void ata_id_c_string(const u16 *id, unsigned char *s, 1044 unsigned int ofs, unsigned int len); 1045 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1046 struct ata_taskfile *tf, u16 *id); 1047 extern void ata_qc_complete(struct ata_queued_cmd *qc); 1048 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 1049 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd); 1050 extern int ata_std_bios_param(struct scsi_device *sdev, 1051 struct block_device *bdev, 1052 sector_t capacity, int geom[]); 1053 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev); 1054 extern int ata_scsi_slave_config(struct scsi_device *sdev); 1055 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1056 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1057 int queue_depth, int reason); 1058 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1059 int queue_depth, int reason); 1060 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1061 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1062 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap); 1063 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q); 1064 1065 extern int ata_cable_40wire(struct ata_port *ap); 1066 extern int ata_cable_80wire(struct ata_port *ap); 1067 extern int ata_cable_sata(struct ata_port *ap); 1068 extern int ata_cable_ignore(struct ata_port *ap); 1069 extern int ata_cable_unknown(struct ata_port *ap); 1070 1071 /* Timing helpers */ 1072 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1073 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1074 extern int ata_timing_compute(struct ata_device *, unsigned short, 1075 struct ata_timing *, int, int); 1076 extern void ata_timing_merge(const struct ata_timing *, 1077 const struct ata_timing *, struct ata_timing *, 1078 unsigned int); 1079 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1080 1081 /* PCI */ 1082 #ifdef CONFIG_PCI 1083 struct pci_dev; 1084 1085 struct pci_bits { 1086 unsigned int reg; /* PCI config register to read */ 1087 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1088 unsigned long mask; 1089 unsigned long val; 1090 }; 1091 1092 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1093 extern void ata_pci_remove_one(struct pci_dev *pdev); 1094 1095 #ifdef CONFIG_PM 1096 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1097 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1098 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1099 extern int ata_pci_device_resume(struct pci_dev *pdev); 1100 #endif /* CONFIG_PM */ 1101 #endif /* CONFIG_PCI */ 1102 1103 /* 1104 * ACPI - drivers/ata/libata-acpi.c 1105 */ 1106 #ifdef CONFIG_ATA_ACPI 1107 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1108 { 1109 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1110 return &ap->__acpi_init_gtm; 1111 return NULL; 1112 } 1113 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1114 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1115 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1116 const struct ata_acpi_gtm *gtm); 1117 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1118 #else 1119 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1120 { 1121 return NULL; 1122 } 1123 1124 static inline int ata_acpi_stm(const struct ata_port *ap, 1125 struct ata_acpi_gtm *stm) 1126 { 1127 return -ENOSYS; 1128 } 1129 1130 static inline int ata_acpi_gtm(const struct ata_port *ap, 1131 struct ata_acpi_gtm *stm) 1132 { 1133 return -ENOSYS; 1134 } 1135 1136 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1137 const struct ata_acpi_gtm *gtm) 1138 { 1139 return 0; 1140 } 1141 1142 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1143 const struct ata_acpi_gtm *gtm) 1144 { 1145 return 0; 1146 } 1147 #endif 1148 1149 /* 1150 * EH - drivers/ata/libata-eh.c 1151 */ 1152 extern void ata_port_schedule_eh(struct ata_port *ap); 1153 extern void ata_port_wait_eh(struct ata_port *ap); 1154 extern int ata_link_abort(struct ata_link *link); 1155 extern int ata_port_abort(struct ata_port *ap); 1156 extern int ata_port_freeze(struct ata_port *ap); 1157 extern int sata_async_notification(struct ata_port *ap); 1158 1159 extern void ata_eh_freeze_port(struct ata_port *ap); 1160 extern void ata_eh_thaw_port(struct ata_port *ap); 1161 1162 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1163 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1164 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1165 1166 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1167 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1168 ata_postreset_fn_t postreset); 1169 extern void ata_std_error_handler(struct ata_port *ap); 1170 extern int ata_link_nr_enabled(struct ata_link *link); 1171 1172 /* 1173 * Base operations to inherit from and initializers for sht 1174 * 1175 * Operations 1176 * 1177 * base : Common to all libata drivers. 1178 * sata : SATA controllers w/ native interface. 1179 * pmp : SATA controllers w/ PMP support. 1180 * sff : SFF ATA controllers w/o BMDMA support. 1181 * bmdma : SFF ATA controllers w/ BMDMA support. 1182 * 1183 * sht initializers 1184 * 1185 * BASE : Common to all libata drivers. The user must set 1186 * sg_tablesize and dma_boundary. 1187 * PIO : SFF ATA controllers w/ only PIO support. 1188 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1189 * dma_boundary are set to BMDMA limits. 1190 * NCQ : SATA controllers supporting NCQ. The user must set 1191 * sg_tablesize, dma_boundary and can_queue. 1192 */ 1193 extern const struct ata_port_operations ata_base_port_ops; 1194 extern const struct ata_port_operations sata_port_ops; 1195 extern struct device_attribute *ata_common_sdev_attrs[]; 1196 1197 #define ATA_BASE_SHT(drv_name) \ 1198 .module = THIS_MODULE, \ 1199 .name = drv_name, \ 1200 .ioctl = ata_scsi_ioctl, \ 1201 .queuecommand = ata_scsi_queuecmd, \ 1202 .can_queue = ATA_DEF_QUEUE, \ 1203 .this_id = ATA_SHT_THIS_ID, \ 1204 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1205 .emulated = ATA_SHT_EMULATED, \ 1206 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1207 .proc_name = drv_name, \ 1208 .slave_configure = ata_scsi_slave_config, \ 1209 .slave_destroy = ata_scsi_slave_destroy, \ 1210 .bios_param = ata_std_bios_param, \ 1211 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \ 1212 .sdev_attrs = ata_common_sdev_attrs 1213 1214 #define ATA_NCQ_SHT(drv_name) \ 1215 ATA_BASE_SHT(drv_name), \ 1216 .change_queue_depth = ata_scsi_change_queue_depth 1217 1218 /* 1219 * PMP helpers 1220 */ 1221 #ifdef CONFIG_SATA_PMP 1222 static inline bool sata_pmp_supported(struct ata_port *ap) 1223 { 1224 return ap->flags & ATA_FLAG_PMP; 1225 } 1226 1227 static inline bool sata_pmp_attached(struct ata_port *ap) 1228 { 1229 return ap->nr_pmp_links != 0; 1230 } 1231 1232 static inline int ata_is_host_link(const struct ata_link *link) 1233 { 1234 return link == &link->ap->link || link == link->ap->slave_link; 1235 } 1236 #else /* CONFIG_SATA_PMP */ 1237 static inline bool sata_pmp_supported(struct ata_port *ap) 1238 { 1239 return false; 1240 } 1241 1242 static inline bool sata_pmp_attached(struct ata_port *ap) 1243 { 1244 return false; 1245 } 1246 1247 static inline int ata_is_host_link(const struct ata_link *link) 1248 { 1249 return 1; 1250 } 1251 #endif /* CONFIG_SATA_PMP */ 1252 1253 static inline int sata_srst_pmp(struct ata_link *link) 1254 { 1255 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1256 return SATA_PMP_CTRL_PORT; 1257 return link->pmp; 1258 } 1259 1260 /* 1261 * printk helpers 1262 */ 1263 __printf(3, 4) 1264 int ata_port_printk(const struct ata_port *ap, const char *level, 1265 const char *fmt, ...); 1266 __printf(3, 4) 1267 int ata_link_printk(const struct ata_link *link, const char *level, 1268 const char *fmt, ...); 1269 __printf(3, 4) 1270 int ata_dev_printk(const struct ata_device *dev, const char *level, 1271 const char *fmt, ...); 1272 1273 #define ata_port_err(ap, fmt, ...) \ 1274 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__) 1275 #define ata_port_warn(ap, fmt, ...) \ 1276 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__) 1277 #define ata_port_notice(ap, fmt, ...) \ 1278 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__) 1279 #define ata_port_info(ap, fmt, ...) \ 1280 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__) 1281 #define ata_port_dbg(ap, fmt, ...) \ 1282 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__) 1283 1284 #define ata_link_err(link, fmt, ...) \ 1285 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__) 1286 #define ata_link_warn(link, fmt, ...) \ 1287 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__) 1288 #define ata_link_notice(link, fmt, ...) \ 1289 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__) 1290 #define ata_link_info(link, fmt, ...) \ 1291 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__) 1292 #define ata_link_dbg(link, fmt, ...) \ 1293 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__) 1294 1295 #define ata_dev_err(dev, fmt, ...) \ 1296 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__) 1297 #define ata_dev_warn(dev, fmt, ...) \ 1298 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__) 1299 #define ata_dev_notice(dev, fmt, ...) \ 1300 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__) 1301 #define ata_dev_info(dev, fmt, ...) \ 1302 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__) 1303 #define ata_dev_dbg(dev, fmt, ...) \ 1304 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__) 1305 1306 void ata_print_version(const struct device *dev, const char *version); 1307 1308 /* 1309 * ata_eh_info helpers 1310 */ 1311 extern __printf(2, 3) 1312 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1313 extern __printf(2, 3) 1314 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1315 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1316 1317 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1318 { 1319 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1320 ehi->flags |= ATA_EHI_HOTPLUGGED; 1321 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1322 ehi->err_mask |= AC_ERR_ATA_BUS; 1323 } 1324 1325 /* 1326 * port description helpers 1327 */ 1328 extern __printf(2, 3) 1329 void ata_port_desc(struct ata_port *ap, const char *fmt, ...); 1330 #ifdef CONFIG_PCI 1331 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1332 const char *name); 1333 #endif 1334 1335 static inline unsigned int ata_tag_valid(unsigned int tag) 1336 { 1337 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1338 } 1339 1340 static inline unsigned int ata_tag_internal(unsigned int tag) 1341 { 1342 return tag == ATA_TAG_INTERNAL; 1343 } 1344 1345 /* 1346 * device helpers 1347 */ 1348 static inline unsigned int ata_class_enabled(unsigned int class) 1349 { 1350 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1351 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1352 } 1353 1354 static inline unsigned int ata_class_disabled(unsigned int class) 1355 { 1356 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1357 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1358 } 1359 1360 static inline unsigned int ata_class_absent(unsigned int class) 1361 { 1362 return !ata_class_enabled(class) && !ata_class_disabled(class); 1363 } 1364 1365 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1366 { 1367 return ata_class_enabled(dev->class); 1368 } 1369 1370 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1371 { 1372 return ata_class_disabled(dev->class); 1373 } 1374 1375 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1376 { 1377 return ata_class_absent(dev->class); 1378 } 1379 1380 /* 1381 * link helpers 1382 */ 1383 static inline int ata_link_max_devices(const struct ata_link *link) 1384 { 1385 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1386 return 2; 1387 return 1; 1388 } 1389 1390 static inline int ata_link_active(struct ata_link *link) 1391 { 1392 return ata_tag_valid(link->active_tag) || link->sactive; 1393 } 1394 1395 /* 1396 * Iterators 1397 * 1398 * ATA_LITER_* constants are used to select link iteration mode and 1399 * ATA_DITER_* device iteration mode. 1400 * 1401 * For a custom iteration directly using ata_{link|dev}_next(), if 1402 * @link or @dev, respectively, is NULL, the first element is 1403 * returned. @dev and @link can be any valid device or link and the 1404 * next element according to the iteration mode will be returned. 1405 * After the last element, NULL is returned. 1406 */ 1407 enum ata_link_iter_mode { 1408 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1409 * host link. no slave link */ 1410 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1411 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1412 * slave link still comes after host link */ 1413 }; 1414 1415 enum ata_dev_iter_mode { 1416 ATA_DITER_ENABLED, 1417 ATA_DITER_ENABLED_REVERSE, 1418 ATA_DITER_ALL, 1419 ATA_DITER_ALL_REVERSE, 1420 }; 1421 1422 extern struct ata_link *ata_link_next(struct ata_link *link, 1423 struct ata_port *ap, 1424 enum ata_link_iter_mode mode); 1425 1426 extern struct ata_device *ata_dev_next(struct ata_device *dev, 1427 struct ata_link *link, 1428 enum ata_dev_iter_mode mode); 1429 1430 /* 1431 * Shortcut notation for iterations 1432 * 1433 * ata_for_each_link() iterates over each link of @ap according to 1434 * @mode. @link points to the current link in the loop. @link is 1435 * NULL after loop termination. ata_for_each_dev() works the same way 1436 * except that it iterates over each device of @link. 1437 * 1438 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1439 * specified when using the following shorthand notations. Only the 1440 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1441 * specified. This not only increases brevity but also makes it 1442 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1443 */ 1444 #define ata_for_each_link(link, ap, mode) \ 1445 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1446 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1447 1448 #define ata_for_each_dev(dev, link, mode) \ 1449 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1450 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1451 1452 /** 1453 * ata_ncq_enabled - Test whether NCQ is enabled 1454 * @dev: ATA device to test for 1455 * 1456 * LOCKING: 1457 * spin_lock_irqsave(host lock) 1458 * 1459 * RETURNS: 1460 * 1 if NCQ is enabled for @dev, 0 otherwise. 1461 */ 1462 static inline int ata_ncq_enabled(struct ata_device *dev) 1463 { 1464 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1465 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1466 } 1467 1468 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1469 { 1470 qc->tf.ctl |= ATA_NIEN; 1471 } 1472 1473 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1474 unsigned int tag) 1475 { 1476 if (likely(ata_tag_valid(tag))) 1477 return &ap->qcmd[tag]; 1478 return NULL; 1479 } 1480 1481 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1482 unsigned int tag) 1483 { 1484 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1485 1486 if (unlikely(!qc) || !ap->ops->error_handler) 1487 return qc; 1488 1489 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1490 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1491 return qc; 1492 1493 return NULL; 1494 } 1495 1496 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1497 { 1498 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1499 } 1500 1501 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1502 { 1503 memset(tf, 0, sizeof(*tf)); 1504 1505 #ifdef CONFIG_ATA_SFF 1506 tf->ctl = dev->link->ap->ctl; 1507 #else 1508 tf->ctl = ATA_DEVCTL_OBS; 1509 #endif 1510 if (dev->devno == 0) 1511 tf->device = ATA_DEVICE_OBS; 1512 else 1513 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1514 } 1515 1516 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1517 { 1518 qc->dma_dir = DMA_NONE; 1519 qc->sg = NULL; 1520 qc->flags = 0; 1521 qc->cursg = NULL; 1522 qc->cursg_ofs = 0; 1523 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1524 qc->n_elem = 0; 1525 qc->err_mask = 0; 1526 qc->sect_size = ATA_SECT_SIZE; 1527 1528 ata_tf_init(qc->dev, &qc->tf); 1529 1530 /* init result_tf such that it indicates normal completion */ 1531 qc->result_tf.command = ATA_DRDY; 1532 qc->result_tf.feature = 0; 1533 } 1534 1535 static inline int ata_try_flush_cache(const struct ata_device *dev) 1536 { 1537 return ata_id_wcache_enabled(dev->id) || 1538 ata_id_has_flush(dev->id) || 1539 ata_id_has_flush_ext(dev->id); 1540 } 1541 1542 static inline unsigned int ac_err_mask(u8 status) 1543 { 1544 if (status & (ATA_BUSY | ATA_DRQ)) 1545 return AC_ERR_HSM; 1546 if (status & (ATA_ERR | ATA_DF)) 1547 return AC_ERR_DEV; 1548 return 0; 1549 } 1550 1551 static inline unsigned int __ac_err_mask(u8 status) 1552 { 1553 unsigned int mask = ac_err_mask(status); 1554 if (mask == 0) 1555 return AC_ERR_OTHER; 1556 return mask; 1557 } 1558 1559 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1560 { 1561 return *(struct ata_port **)&host->hostdata[0]; 1562 } 1563 1564 static inline int ata_check_ready(u8 status) 1565 { 1566 if (!(status & ATA_BUSY)) 1567 return 1; 1568 1569 /* 0xff indicates either no device or device not ready */ 1570 if (status == 0xff) 1571 return -ENODEV; 1572 1573 return 0; 1574 } 1575 1576 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1577 unsigned long timeout_msecs) 1578 { 1579 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1580 } 1581 1582 /* Don't open code these in drivers as there are traps. Firstly the range may 1583 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1584 > UDMA_0. Dyma ddreigiau */ 1585 1586 static inline int ata_using_mwdma(struct ata_device *adev) 1587 { 1588 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1589 return 1; 1590 return 0; 1591 } 1592 1593 static inline int ata_using_udma(struct ata_device *adev) 1594 { 1595 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1596 return 1; 1597 return 0; 1598 } 1599 1600 static inline int ata_dma_enabled(struct ata_device *adev) 1601 { 1602 return (adev->dma_mode == 0xFF ? 0 : 1); 1603 } 1604 1605 /************************************************************************** 1606 * PMP - drivers/ata/libata-pmp.c 1607 */ 1608 #ifdef CONFIG_SATA_PMP 1609 1610 extern const struct ata_port_operations sata_pmp_port_ops; 1611 1612 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1613 extern void sata_pmp_error_handler(struct ata_port *ap); 1614 1615 #else /* CONFIG_SATA_PMP */ 1616 1617 #define sata_pmp_port_ops sata_port_ops 1618 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1619 #define sata_pmp_error_handler ata_std_error_handler 1620 1621 #endif /* CONFIG_SATA_PMP */ 1622 1623 1624 /************************************************************************** 1625 * SFF - drivers/ata/libata-sff.c 1626 */ 1627 #ifdef CONFIG_ATA_SFF 1628 1629 extern const struct ata_port_operations ata_sff_port_ops; 1630 extern const struct ata_port_operations ata_bmdma32_port_ops; 1631 1632 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1633 #define ATA_PIO_SHT(drv_name) \ 1634 ATA_BASE_SHT(drv_name), \ 1635 .sg_tablesize = LIBATA_MAX_PRD, \ 1636 .dma_boundary = ATA_DMA_BOUNDARY 1637 1638 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1639 extern u8 ata_sff_check_status(struct ata_port *ap); 1640 extern void ata_sff_pause(struct ata_port *ap); 1641 extern void ata_sff_dma_pause(struct ata_port *ap); 1642 extern int ata_sff_busy_sleep(struct ata_port *ap, 1643 unsigned long timeout_pat, unsigned long timeout); 1644 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1645 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1646 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1647 extern void ata_sff_exec_command(struct ata_port *ap, 1648 const struct ata_taskfile *tf); 1649 extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1650 unsigned char *buf, unsigned int buflen, int rw); 1651 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1652 unsigned char *buf, unsigned int buflen, int rw); 1653 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1654 unsigned char *buf, unsigned int buflen, int rw); 1655 extern void ata_sff_irq_on(struct ata_port *ap); 1656 extern void ata_sff_irq_clear(struct ata_port *ap); 1657 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1658 u8 status, int in_wq); 1659 extern void ata_sff_queue_work(struct work_struct *work); 1660 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork, 1661 unsigned long delay); 1662 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay); 1663 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1664 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1665 extern unsigned int ata_sff_port_intr(struct ata_port *ap, 1666 struct ata_queued_cmd *qc); 1667 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1668 extern void ata_sff_lost_interrupt(struct ata_port *ap); 1669 extern void ata_sff_freeze(struct ata_port *ap); 1670 extern void ata_sff_thaw(struct ata_port *ap); 1671 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1672 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1673 u8 *r_err); 1674 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1675 unsigned long deadline); 1676 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1677 unsigned long deadline); 1678 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1679 unsigned long deadline); 1680 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1681 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1682 extern void ata_sff_error_handler(struct ata_port *ap); 1683 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1684 #ifdef CONFIG_PCI 1685 extern int ata_pci_sff_init_host(struct ata_host *host); 1686 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1687 const struct ata_port_info * const * ppi, 1688 struct ata_host **r_host); 1689 extern int ata_pci_sff_activate_host(struct ata_host *host, 1690 irq_handler_t irq_handler, 1691 struct scsi_host_template *sht); 1692 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1693 const struct ata_port_info * const * ppi, 1694 struct scsi_host_template *sht, void *host_priv, int hflags); 1695 #endif /* CONFIG_PCI */ 1696 1697 #ifdef CONFIG_ATA_BMDMA 1698 1699 extern const struct ata_port_operations ata_bmdma_port_ops; 1700 1701 #define ATA_BMDMA_SHT(drv_name) \ 1702 ATA_BASE_SHT(drv_name), \ 1703 .sg_tablesize = LIBATA_MAX_PRD, \ 1704 .dma_boundary = ATA_DMA_BOUNDARY 1705 1706 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc); 1707 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc); 1708 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc); 1709 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap, 1710 struct ata_queued_cmd *qc); 1711 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance); 1712 extern void ata_bmdma_error_handler(struct ata_port *ap); 1713 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 1714 extern void ata_bmdma_irq_clear(struct ata_port *ap); 1715 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1716 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1717 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1718 extern u8 ata_bmdma_status(struct ata_port *ap); 1719 extern int ata_bmdma_port_start(struct ata_port *ap); 1720 extern int ata_bmdma_port_start32(struct ata_port *ap); 1721 1722 #ifdef CONFIG_PCI 1723 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1724 extern void ata_pci_bmdma_init(struct ata_host *host); 1725 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev, 1726 const struct ata_port_info * const * ppi, 1727 struct ata_host **r_host); 1728 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev, 1729 const struct ata_port_info * const * ppi, 1730 struct scsi_host_template *sht, 1731 void *host_priv, int hflags); 1732 #endif /* CONFIG_PCI */ 1733 #endif /* CONFIG_ATA_BMDMA */ 1734 1735 /** 1736 * ata_sff_busy_wait - Wait for a port status register 1737 * @ap: Port to wait for. 1738 * @bits: bits that must be clear 1739 * @max: number of 10uS waits to perform 1740 * 1741 * Waits up to max*10 microseconds for the selected bits in the port's 1742 * status register to be cleared. 1743 * Returns final value of status register. 1744 * 1745 * LOCKING: 1746 * Inherited from caller. 1747 */ 1748 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1749 unsigned int max) 1750 { 1751 u8 status; 1752 1753 do { 1754 udelay(10); 1755 status = ap->ops->sff_check_status(ap); 1756 max--; 1757 } while (status != 0xff && (status & bits) && (max > 0)); 1758 1759 return status; 1760 } 1761 1762 /** 1763 * ata_wait_idle - Wait for a port to be idle. 1764 * @ap: Port to wait for. 1765 * 1766 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1767 * Returns final value of status register. 1768 * 1769 * LOCKING: 1770 * Inherited from caller. 1771 */ 1772 static inline u8 ata_wait_idle(struct ata_port *ap) 1773 { 1774 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1775 1776 #ifdef ATA_DEBUG 1777 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1778 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1779 status); 1780 #endif 1781 1782 return status; 1783 } 1784 #endif /* CONFIG_ATA_SFF */ 1785 1786 #endif /* __LINUX_LIBATA_H__ */ 1787