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_DFLAG_DA = (1 << 26), /* device supports Device Attention */ 165 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */ 166 167 ATA_DEV_UNKNOWN = 0, /* unknown device */ 168 ATA_DEV_ATA = 1, /* ATA device */ 169 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 170 ATA_DEV_ATAPI = 3, /* ATAPI device */ 171 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 172 ATA_DEV_PMP = 5, /* SATA port multiplier */ 173 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 174 ATA_DEV_SEMB = 7, /* SEMB */ 175 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 176 ATA_DEV_NONE = 9, /* no device */ 177 178 /* struct ata_link flags */ 179 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ 180 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ 181 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ 182 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ 183 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 184 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 185 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 186 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */ 187 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */ 188 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */ 189 190 /* struct ata_port flags */ 191 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 192 /* (doesn't imply presence) */ 193 ATA_FLAG_SATA = (1 << 1), 194 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 195 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 196 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 197 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 198 * doesn't handle PIO interrupts */ 199 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 200 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ 201 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ 202 ATA_FLAG_DEBUGMSG = (1 << 13), 203 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */ 204 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 205 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 206 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 207 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 208 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 209 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 210 * management */ 211 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 212 * led */ 213 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */ 214 215 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 216 217 218 /* struct ata_port pflags */ 219 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 220 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 221 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 222 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 223 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 224 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 225 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 226 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 227 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 228 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 229 230 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 231 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 232 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 233 234 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 235 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 236 237 /* struct ata_queued_cmd flags */ 238 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 239 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 240 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 241 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 242 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 243 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 244 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 245 246 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 247 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 248 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 249 250 /* host set flags */ 251 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 252 ATA_HOST_STARTED = (1 << 1), /* Host started */ 253 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 254 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */ 255 256 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 257 258 /* various lengths of time */ 259 ATA_TMOUT_BOOT = 30000, /* heuristic */ 260 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 261 ATA_TMOUT_INTERNAL_QUICK = 5000, 262 ATA_TMOUT_MAX_PARK = 30000, 263 264 /* 265 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s 266 * is too much without parallel probing. Use 2s if parallel 267 * probing is available, 800ms otherwise. 268 */ 269 ATA_TMOUT_FF_WAIT_LONG = 2000, 270 ATA_TMOUT_FF_WAIT = 800, 271 272 /* Spec mandates to wait for ">= 2ms" before checking status 273 * after reset. We wait 150ms, because that was the magic 274 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 275 * the period of time between when the ATA command register is 276 * written, and then status is checked. Because waiting for 277 * "a while" before checking status is fine, post SRST, we 278 * perform this magic delay here as well. 279 * 280 * Old drivers/ide uses the 2mS rule and then waits for ready. 281 */ 282 ATA_WAIT_AFTER_RESET = 150, 283 284 /* If PMP is supported, we have to do follow-up SRST. As some 285 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 286 * advised to wait only for the following duration before 287 * doing SRST. 288 */ 289 ATA_TMOUT_PMP_SRST_WAIT = 5000, 290 291 /* ATA bus states */ 292 BUS_UNKNOWN = 0, 293 BUS_DMA = 1, 294 BUS_IDLE = 2, 295 BUS_NOINTR = 3, 296 BUS_NODATA = 4, 297 BUS_TIMER = 5, 298 BUS_PIO = 6, 299 BUS_EDD = 7, 300 BUS_IDENTIFY = 8, 301 BUS_PACKET = 9, 302 303 /* SATA port states */ 304 PORT_UNKNOWN = 0, 305 PORT_ENABLED = 1, 306 PORT_DISABLED = 2, 307 308 /* encoding various smaller bitmaps into a single 309 * unsigned long bitmap 310 */ 311 ATA_NR_PIO_MODES = 7, 312 ATA_NR_MWDMA_MODES = 5, 313 ATA_NR_UDMA_MODES = 8, 314 315 ATA_SHIFT_PIO = 0, 316 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 317 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 318 319 /* size of buffer to pad xfers ending on unaligned boundaries */ 320 ATA_DMA_PAD_SZ = 4, 321 322 /* ering size */ 323 ATA_ERING_SIZE = 32, 324 325 /* return values for ->qc_defer */ 326 ATA_DEFER_LINK = 1, 327 ATA_DEFER_PORT = 2, 328 329 /* desc_len for ata_eh_info and context */ 330 ATA_EH_DESC_LEN = 80, 331 332 /* reset / recovery action types */ 333 ATA_EH_REVALIDATE = (1 << 0), 334 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 335 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 336 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 337 ATA_EH_ENABLE_LINK = (1 << 3), 338 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 339 340 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 341 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 342 ATA_EH_ENABLE_LINK, 343 344 /* ata_eh_info->flags */ 345 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 346 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 347 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 348 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */ 349 350 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 351 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 352 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 353 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 354 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */ 355 356 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 357 358 /* mask of flags to transfer *to* the slave link */ 359 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 360 361 /* max tries if error condition is still set after ->error_handler */ 362 ATA_EH_MAX_TRIES = 5, 363 364 /* sometimes resuming a link requires several retries */ 365 ATA_LINK_RESUME_TRIES = 5, 366 367 /* how hard are we gonna try to probe/recover devices */ 368 ATA_PROBE_MAX_TRIES = 3, 369 ATA_EH_DEV_TRIES = 3, 370 ATA_EH_PMP_TRIES = 5, 371 ATA_EH_PMP_LINK_TRIES = 3, 372 373 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 374 375 /* This should match the actual table size of 376 * ata_eh_cmd_timeout_table in libata-eh.c. 377 */ 378 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6, 379 380 /* Horkage types. May be set by libata or controller on drives 381 (some horkage may be drive/controller pair dependent */ 382 383 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 384 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 385 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 386 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 387 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 388 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 389 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 390 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 391 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 392 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 393 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 394 not multiple of 16 bytes */ 395 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */ 396 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 397 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ 398 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ 399 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */ 400 401 /* DMA mask for user DMA control: User visible values; DO NOT 402 renumber */ 403 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 404 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 405 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 406 407 /* ATAPI command types */ 408 ATAPI_READ = 0, /* READs */ 409 ATAPI_WRITE = 1, /* WRITEs */ 410 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 411 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 412 ATAPI_MISC = 4, /* the rest */ 413 414 /* Timing constants */ 415 ATA_TIMING_SETUP = (1 << 0), 416 ATA_TIMING_ACT8B = (1 << 1), 417 ATA_TIMING_REC8B = (1 << 2), 418 ATA_TIMING_CYC8B = (1 << 3), 419 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 420 ATA_TIMING_CYC8B, 421 ATA_TIMING_ACTIVE = (1 << 4), 422 ATA_TIMING_RECOVER = (1 << 5), 423 ATA_TIMING_DMACK_HOLD = (1 << 6), 424 ATA_TIMING_CYCLE = (1 << 7), 425 ATA_TIMING_UDMA = (1 << 8), 426 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 427 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 428 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 429 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 430 ATA_TIMING_UDMA, 431 432 /* ACPI constants */ 433 ATA_ACPI_FILTER_SETXFER = 1 << 0, 434 ATA_ACPI_FILTER_LOCK = 1 << 1, 435 ATA_ACPI_FILTER_DIPM = 1 << 2, 436 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 437 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 438 439 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 440 ATA_ACPI_FILTER_LOCK | 441 ATA_ACPI_FILTER_DIPM, 442 }; 443 444 enum ata_xfer_mask { 445 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 446 << ATA_SHIFT_PIO, 447 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 448 << ATA_SHIFT_MWDMA, 449 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 450 << ATA_SHIFT_UDMA, 451 }; 452 453 enum hsm_task_states { 454 HSM_ST_IDLE, /* no command on going */ 455 HSM_ST_FIRST, /* (waiting the device to) 456 write CDB or first data block */ 457 HSM_ST, /* (waiting the device to) transfer data */ 458 HSM_ST_LAST, /* (waiting the device to) complete command */ 459 HSM_ST_ERR, /* error */ 460 }; 461 462 enum ata_completion_errors { 463 AC_ERR_DEV = (1 << 0), /* device reported error */ 464 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 465 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 466 AC_ERR_MEDIA = (1 << 3), /* media error */ 467 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 468 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 469 AC_ERR_SYSTEM = (1 << 6), /* system error */ 470 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 471 AC_ERR_OTHER = (1 << 8), /* unknown */ 472 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 473 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 474 }; 475 476 /* 477 * Link power management policy: If you alter this, you also need to 478 * alter libata-scsi.c (for the ascii descriptions) 479 */ 480 enum ata_lpm_policy { 481 ATA_LPM_UNKNOWN, 482 ATA_LPM_MAX_POWER, 483 ATA_LPM_MED_POWER, 484 ATA_LPM_MIN_POWER, 485 }; 486 487 enum ata_lpm_hints { 488 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */ 489 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */ 490 }; 491 492 /* forward declarations */ 493 struct scsi_device; 494 struct ata_port_operations; 495 struct ata_port; 496 struct ata_link; 497 struct ata_queued_cmd; 498 499 /* typedefs */ 500 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 501 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 502 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 503 unsigned long deadline); 504 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 505 506 extern struct device_attribute dev_attr_link_power_management_policy; 507 extern struct device_attribute dev_attr_unload_heads; 508 extern struct device_attribute dev_attr_em_message_type; 509 extern struct device_attribute dev_attr_em_message; 510 extern struct device_attribute dev_attr_sw_activity; 511 512 enum sw_activity { 513 OFF, 514 BLINK_ON, 515 BLINK_OFF, 516 }; 517 518 #ifdef CONFIG_ATA_SFF 519 struct ata_ioports { 520 void __iomem *cmd_addr; 521 void __iomem *data_addr; 522 void __iomem *error_addr; 523 void __iomem *feature_addr; 524 void __iomem *nsect_addr; 525 void __iomem *lbal_addr; 526 void __iomem *lbam_addr; 527 void __iomem *lbah_addr; 528 void __iomem *device_addr; 529 void __iomem *status_addr; 530 void __iomem *command_addr; 531 void __iomem *altstatus_addr; 532 void __iomem *ctl_addr; 533 #ifdef CONFIG_ATA_BMDMA 534 void __iomem *bmdma_addr; 535 #endif /* CONFIG_ATA_BMDMA */ 536 void __iomem *scr_addr; 537 }; 538 #endif /* CONFIG_ATA_SFF */ 539 540 struct ata_host { 541 spinlock_t lock; 542 struct device *dev; 543 void __iomem * const *iomap; 544 unsigned int n_ports; 545 void *private_data; 546 struct ata_port_operations *ops; 547 unsigned long flags; 548 549 struct mutex eh_mutex; 550 struct task_struct *eh_owner; 551 552 struct ata_port *simplex_claimed; /* channel owning the DMA */ 553 struct ata_port *ports[0]; 554 }; 555 556 struct ata_queued_cmd { 557 struct ata_port *ap; 558 struct ata_device *dev; 559 560 struct scsi_cmnd *scsicmd; 561 void (*scsidone)(struct scsi_cmnd *); 562 563 struct ata_taskfile tf; 564 u8 cdb[ATAPI_CDB_LEN]; 565 566 unsigned long flags; /* ATA_QCFLAG_xxx */ 567 unsigned int tag; 568 unsigned int n_elem; 569 unsigned int orig_n_elem; 570 571 int dma_dir; 572 573 unsigned int sect_size; 574 575 unsigned int nbytes; 576 unsigned int extrabytes; 577 unsigned int curbytes; 578 579 struct scatterlist sgent; 580 581 struct scatterlist *sg; 582 583 struct scatterlist *cursg; 584 unsigned int cursg_ofs; 585 586 unsigned int err_mask; 587 struct ata_taskfile result_tf; 588 ata_qc_cb_t complete_fn; 589 590 void *private_data; 591 void *lldd_task; 592 }; 593 594 struct ata_port_stats { 595 unsigned long unhandled_irq; 596 unsigned long idle_irq; 597 unsigned long rw_reqbuf; 598 }; 599 600 struct ata_ering_entry { 601 unsigned int eflags; 602 unsigned int err_mask; 603 u64 timestamp; 604 }; 605 606 struct ata_ering { 607 int cursor; 608 struct ata_ering_entry ring[ATA_ERING_SIZE]; 609 }; 610 611 struct ata_device { 612 struct ata_link *link; 613 unsigned int devno; /* 0 or 1 */ 614 unsigned int horkage; /* List of broken features */ 615 unsigned long flags; /* ATA_DFLAG_xxx */ 616 struct scsi_device *sdev; /* attached SCSI device */ 617 void *private_data; 618 #ifdef CONFIG_ATA_ACPI 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 /* Identify Device Data Log (30h), SATA Settings (page 08h) */ 655 u8 sata_settings[ATA_SECT_SIZE]; 656 657 /* error history */ 658 int spdn_cnt; 659 /* ering is CLEAR_END, read comment above CLEAR_END */ 660 struct ata_ering ering; 661 }; 662 663 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 664 * cleared to zero on ata_dev_init(). 665 */ 666 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 667 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 668 669 struct ata_eh_info { 670 struct ata_device *dev; /* offending device */ 671 u32 serror; /* SError from LLDD */ 672 unsigned int err_mask; /* port-wide err_mask */ 673 unsigned int action; /* ATA_EH_* action mask */ 674 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 675 unsigned int flags; /* ATA_EHI_* flags */ 676 677 unsigned int probe_mask; 678 679 char desc[ATA_EH_DESC_LEN]; 680 int desc_len; 681 }; 682 683 struct ata_eh_context { 684 struct ata_eh_info i; 685 int tries[ATA_MAX_DEVICES]; 686 int cmd_timeout_idx[ATA_MAX_DEVICES] 687 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 688 unsigned int classes[ATA_MAX_DEVICES]; 689 unsigned int did_probe_mask; 690 unsigned int unloaded_mask; 691 unsigned int saved_ncq_enabled; 692 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 693 /* timestamp for the last reset attempt or success */ 694 unsigned long last_reset; 695 }; 696 697 struct ata_acpi_drive 698 { 699 u32 pio; 700 u32 dma; 701 } __packed; 702 703 struct ata_acpi_gtm { 704 struct ata_acpi_drive drive[2]; 705 u32 flags; 706 } __packed; 707 708 struct ata_link { 709 struct ata_port *ap; 710 int pmp; /* port multiplier port # */ 711 712 struct device tdev; 713 unsigned int active_tag; /* active tag on this link */ 714 u32 sactive; /* active NCQ commands */ 715 716 unsigned int flags; /* ATA_LFLAG_xxx */ 717 718 u32 saved_scontrol; /* SControl on probe */ 719 unsigned int hw_sata_spd_limit; 720 unsigned int sata_spd_limit; 721 unsigned int sata_spd; /* current SATA PHY speed */ 722 enum ata_lpm_policy lpm_policy; 723 724 /* record runtime error info, protected by host_set lock */ 725 struct ata_eh_info eh_info; 726 /* EH context */ 727 struct ata_eh_context eh_context; 728 729 struct ata_device device[ATA_MAX_DEVICES]; 730 }; 731 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag) 732 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0]) 733 734 struct ata_port { 735 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 736 struct ata_port_operations *ops; 737 spinlock_t *lock; 738 /* Flags owned by the EH context. Only EH should touch these once the 739 port is active */ 740 unsigned long flags; /* ATA_FLAG_xxx */ 741 /* Flags that change dynamically, protected by ap->lock */ 742 unsigned int pflags; /* ATA_PFLAG_xxx */ 743 unsigned int print_id; /* user visible unique port ID */ 744 unsigned int port_no; /* 0 based port no. inside the host */ 745 746 #ifdef CONFIG_ATA_SFF 747 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 748 u8 ctl; /* cache of ATA control register */ 749 u8 last_ctl; /* Cache last written value */ 750 struct ata_link* sff_pio_task_link; /* link currently used */ 751 struct delayed_work sff_pio_task; 752 #ifdef CONFIG_ATA_BMDMA 753 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */ 754 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */ 755 #endif /* CONFIG_ATA_BMDMA */ 756 #endif /* CONFIG_ATA_SFF */ 757 758 unsigned int pio_mask; 759 unsigned int mwdma_mask; 760 unsigned int udma_mask; 761 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 762 763 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 764 unsigned long qc_allocated; 765 unsigned int qc_active; 766 int nr_active_links; /* #links with active qcs */ 767 768 struct ata_link link; /* host default link */ 769 struct ata_link *slave_link; /* see ata_slave_link_init() */ 770 771 int nr_pmp_links; /* nr of available PMP links */ 772 struct ata_link *pmp_link; /* array of PMP links */ 773 struct ata_link *excl_link; /* for PMP qc exclusion */ 774 775 struct ata_port_stats stats; 776 struct ata_host *host; 777 struct device *dev; 778 struct device tdev; 779 780 struct mutex scsi_scan_mutex; 781 struct delayed_work hotplug_task; 782 struct work_struct scsi_rescan_task; 783 784 unsigned int hsm_task_state; 785 786 u32 msg_enable; 787 struct list_head eh_done_q; 788 wait_queue_head_t eh_wait_q; 789 int eh_tries; 790 struct completion park_req_pending; 791 792 pm_message_t pm_mesg; 793 int *pm_result; 794 enum ata_lpm_policy target_lpm_policy; 795 796 struct timer_list fastdrain_timer; 797 unsigned long fastdrain_cnt; 798 799 int em_message_type; 800 void *private_data; 801 802 #ifdef CONFIG_ATA_ACPI 803 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 804 #endif 805 /* owned by EH */ 806 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 807 }; 808 809 /* The following initializer overrides a method to NULL whether one of 810 * its parent has the method defined or not. This is equivalent to 811 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 812 * expression and thus can't be used as an initializer. 813 */ 814 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 815 816 struct ata_port_operations { 817 /* 818 * Command execution 819 */ 820 int (*qc_defer)(struct ata_queued_cmd *qc); 821 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 822 void (*qc_prep)(struct ata_queued_cmd *qc); 823 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 824 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 825 826 /* 827 * Configuration and exception handling 828 */ 829 int (*cable_detect)(struct ata_port *ap); 830 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 831 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 832 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 833 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 834 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 835 836 void (*dev_config)(struct ata_device *dev); 837 838 void (*freeze)(struct ata_port *ap); 839 void (*thaw)(struct ata_port *ap); 840 ata_prereset_fn_t prereset; 841 ata_reset_fn_t softreset; 842 ata_reset_fn_t hardreset; 843 ata_postreset_fn_t postreset; 844 ata_prereset_fn_t pmp_prereset; 845 ata_reset_fn_t pmp_softreset; 846 ata_reset_fn_t pmp_hardreset; 847 ata_postreset_fn_t pmp_postreset; 848 void (*error_handler)(struct ata_port *ap); 849 void (*lost_interrupt)(struct ata_port *ap); 850 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 851 void (*sched_eh)(struct ata_port *ap); 852 void (*end_eh)(struct ata_port *ap); 853 854 /* 855 * Optional features 856 */ 857 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 858 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 859 void (*pmp_attach)(struct ata_port *ap); 860 void (*pmp_detach)(struct ata_port *ap); 861 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy, 862 unsigned hints); 863 864 /* 865 * Start, stop, suspend and resume 866 */ 867 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 868 int (*port_resume)(struct ata_port *ap); 869 int (*port_start)(struct ata_port *ap); 870 void (*port_stop)(struct ata_port *ap); 871 void (*host_stop)(struct ata_host *host); 872 873 #ifdef CONFIG_ATA_SFF 874 /* 875 * SFF / taskfile oriented ops 876 */ 877 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 878 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl); 879 u8 (*sff_check_status)(struct ata_port *ap); 880 u8 (*sff_check_altstatus)(struct ata_port *ap); 881 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 882 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 883 void (*sff_exec_command)(struct ata_port *ap, 884 const struct ata_taskfile *tf); 885 unsigned int (*sff_data_xfer)(struct ata_device *dev, 886 unsigned char *buf, unsigned int buflen, int rw); 887 void (*sff_irq_on)(struct ata_port *); 888 bool (*sff_irq_check)(struct ata_port *); 889 void (*sff_irq_clear)(struct ata_port *); 890 void (*sff_drain_fifo)(struct ata_queued_cmd *qc); 891 892 #ifdef CONFIG_ATA_BMDMA 893 void (*bmdma_setup)(struct ata_queued_cmd *qc); 894 void (*bmdma_start)(struct ata_queued_cmd *qc); 895 void (*bmdma_stop)(struct ata_queued_cmd *qc); 896 u8 (*bmdma_status)(struct ata_port *ap); 897 #endif /* CONFIG_ATA_BMDMA */ 898 #endif /* CONFIG_ATA_SFF */ 899 900 ssize_t (*em_show)(struct ata_port *ap, char *buf); 901 ssize_t (*em_store)(struct ata_port *ap, const char *message, 902 size_t size); 903 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 904 ssize_t (*sw_activity_store)(struct ata_device *dev, 905 enum sw_activity val); 906 /* 907 * Obsolete 908 */ 909 void (*phy_reset)(struct ata_port *ap); 910 void (*eng_timeout)(struct ata_port *ap); 911 912 /* 913 * ->inherits must be the last field and all the preceding 914 * fields must be pointers. 915 */ 916 const struct ata_port_operations *inherits; 917 }; 918 919 struct ata_port_info { 920 unsigned long flags; 921 unsigned long link_flags; 922 unsigned long pio_mask; 923 unsigned long mwdma_mask; 924 unsigned long udma_mask; 925 struct ata_port_operations *port_ops; 926 void *private_data; 927 }; 928 929 struct ata_timing { 930 unsigned short mode; /* ATA mode */ 931 unsigned short setup; /* t1 */ 932 unsigned short act8b; /* t2 for 8-bit I/O */ 933 unsigned short rec8b; /* t2i for 8-bit I/O */ 934 unsigned short cyc8b; /* t0 for 8-bit I/O */ 935 unsigned short active; /* t2 or tD */ 936 unsigned short recover; /* t2i or tK */ 937 unsigned short dmack_hold; /* tj */ 938 unsigned short cycle; /* t0 */ 939 unsigned short udma; /* t2CYCTYP/2 */ 940 }; 941 942 /* 943 * Core layer - drivers/ata/libata-core.c 944 */ 945 extern const unsigned long sata_deb_timing_normal[]; 946 extern const unsigned long sata_deb_timing_hotplug[]; 947 extern const unsigned long sata_deb_timing_long[]; 948 949 extern struct ata_port_operations ata_dummy_port_ops; 950 extern const struct ata_port_info ata_dummy_port_info; 951 952 static inline const unsigned long * 953 sata_ehc_deb_timing(struct ata_eh_context *ehc) 954 { 955 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 956 return sata_deb_timing_hotplug; 957 else 958 return sata_deb_timing_normal; 959 } 960 961 static inline int ata_port_is_dummy(struct ata_port *ap) 962 { 963 return ap->ops == &ata_dummy_port_ops; 964 } 965 966 extern int sata_set_spd(struct ata_link *link); 967 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 968 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 969 int (*check_ready)(struct ata_link *link)); 970 extern int sata_link_debounce(struct ata_link *link, 971 const unsigned long *params, unsigned long deadline); 972 extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 973 unsigned long deadline); 974 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, 975 bool spm_wakeup); 976 extern int sata_link_hardreset(struct ata_link *link, 977 const unsigned long *timing, unsigned long deadline, 978 bool *online, int (*check_ready)(struct ata_link *)); 979 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 980 unsigned long deadline); 981 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 982 983 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 984 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 985 const struct ata_port_info * const * ppi, int n_ports); 986 extern int ata_slave_link_init(struct ata_port *ap); 987 extern int ata_host_start(struct ata_host *host); 988 extern int ata_host_register(struct ata_host *host, 989 struct scsi_host_template *sht); 990 extern int ata_host_activate(struct ata_host *host, int irq, 991 irq_handler_t irq_handler, unsigned long irq_flags, 992 struct scsi_host_template *sht); 993 extern void ata_host_detach(struct ata_host *host); 994 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *); 995 extern int ata_scsi_detect(struct scsi_host_template *sht); 996 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 997 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd); 998 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 999 int cmd, void __user *arg); 1000 extern void ata_sas_port_destroy(struct ata_port *); 1001 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 1002 struct ata_port_info *, struct Scsi_Host *); 1003 extern void ata_sas_async_probe(struct ata_port *ap); 1004 extern int ata_sas_sync_probe(struct ata_port *ap); 1005 extern int ata_sas_port_init(struct ata_port *); 1006 extern int ata_sas_port_start(struct ata_port *ap); 1007 extern void ata_sas_port_stop(struct ata_port *ap); 1008 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 1009 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap); 1010 extern int sata_scr_valid(struct ata_link *link); 1011 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 1012 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 1013 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 1014 extern bool ata_link_online(struct ata_link *link); 1015 extern bool ata_link_offline(struct ata_link *link); 1016 #ifdef CONFIG_PM 1017 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 1018 extern void ata_host_resume(struct ata_host *host); 1019 extern int ata_sas_port_async_suspend(struct ata_port *ap, int *async); 1020 extern int ata_sas_port_async_resume(struct ata_port *ap, int *async); 1021 #else 1022 static inline int ata_sas_port_async_suspend(struct ata_port *ap, int *async) 1023 { 1024 return 0; 1025 } 1026 static inline int ata_sas_port_async_resume(struct ata_port *ap, int *async) 1027 { 1028 return 0; 1029 } 1030 #endif 1031 extern int ata_ratelimit(void); 1032 extern void ata_msleep(struct ata_port *ap, unsigned int msecs); 1033 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, 1034 u32 val, unsigned long interval, unsigned long timeout); 1035 extern int atapi_cmd_type(u8 opcode); 1036 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 1037 u8 pmp, int is_cmd, u8 *fis); 1038 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 1039 extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 1040 unsigned long mwdma_mask, unsigned long udma_mask); 1041 extern void ata_unpack_xfermask(unsigned long xfer_mask, 1042 unsigned long *pio_mask, unsigned long *mwdma_mask, 1043 unsigned long *udma_mask); 1044 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 1045 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 1046 extern int ata_xfer_mode2shift(unsigned long xfer_mode); 1047 extern const char *ata_mode_string(unsigned long xfer_mask); 1048 extern unsigned long ata_id_xfermask(const u16 *id); 1049 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1050 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 1051 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1052 unsigned int n_elem); 1053 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1054 extern void ata_dev_disable(struct ata_device *adev); 1055 extern void ata_id_string(const u16 *id, unsigned char *s, 1056 unsigned int ofs, unsigned int len); 1057 extern void ata_id_c_string(const u16 *id, unsigned char *s, 1058 unsigned int ofs, unsigned int len); 1059 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1060 struct ata_taskfile *tf, u16 *id); 1061 extern void ata_qc_complete(struct ata_queued_cmd *qc); 1062 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 1063 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd); 1064 extern int ata_std_bios_param(struct scsi_device *sdev, 1065 struct block_device *bdev, 1066 sector_t capacity, int geom[]); 1067 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev); 1068 extern int ata_scsi_slave_config(struct scsi_device *sdev); 1069 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1070 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1071 int queue_depth, int reason); 1072 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1073 int queue_depth, int reason); 1074 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1075 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1076 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap); 1077 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q); 1078 1079 extern int ata_cable_40wire(struct ata_port *ap); 1080 extern int ata_cable_80wire(struct ata_port *ap); 1081 extern int ata_cable_sata(struct ata_port *ap); 1082 extern int ata_cable_ignore(struct ata_port *ap); 1083 extern int ata_cable_unknown(struct ata_port *ap); 1084 1085 /* Timing helpers */ 1086 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1087 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1088 extern int ata_timing_compute(struct ata_device *, unsigned short, 1089 struct ata_timing *, int, int); 1090 extern void ata_timing_merge(const struct ata_timing *, 1091 const struct ata_timing *, struct ata_timing *, 1092 unsigned int); 1093 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1094 1095 /* PCI */ 1096 #ifdef CONFIG_PCI 1097 struct pci_dev; 1098 1099 struct pci_bits { 1100 unsigned int reg; /* PCI config register to read */ 1101 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1102 unsigned long mask; 1103 unsigned long val; 1104 }; 1105 1106 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1107 extern void ata_pci_remove_one(struct pci_dev *pdev); 1108 1109 #ifdef CONFIG_PM 1110 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1111 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1112 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1113 extern int ata_pci_device_resume(struct pci_dev *pdev); 1114 #endif /* CONFIG_PM */ 1115 #endif /* CONFIG_PCI */ 1116 1117 /* 1118 * ACPI - drivers/ata/libata-acpi.c 1119 */ 1120 #ifdef CONFIG_ATA_ACPI 1121 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1122 { 1123 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1124 return &ap->__acpi_init_gtm; 1125 return NULL; 1126 } 1127 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1128 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1129 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1130 const struct ata_acpi_gtm *gtm); 1131 acpi_handle ata_ap_acpi_handle(struct ata_port *ap); 1132 acpi_handle ata_dev_acpi_handle(struct ata_device *dev); 1133 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1134 #else 1135 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1136 { 1137 return NULL; 1138 } 1139 1140 static inline int ata_acpi_stm(const struct ata_port *ap, 1141 struct ata_acpi_gtm *stm) 1142 { 1143 return -ENOSYS; 1144 } 1145 1146 static inline int ata_acpi_gtm(const struct ata_port *ap, 1147 struct ata_acpi_gtm *stm) 1148 { 1149 return -ENOSYS; 1150 } 1151 1152 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1153 const struct ata_acpi_gtm *gtm) 1154 { 1155 return 0; 1156 } 1157 1158 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1159 const struct ata_acpi_gtm *gtm) 1160 { 1161 return 0; 1162 } 1163 #endif 1164 1165 /* 1166 * EH - drivers/ata/libata-eh.c 1167 */ 1168 extern void ata_port_schedule_eh(struct ata_port *ap); 1169 extern void ata_port_wait_eh(struct ata_port *ap); 1170 extern int ata_link_abort(struct ata_link *link); 1171 extern int ata_port_abort(struct ata_port *ap); 1172 extern int ata_port_freeze(struct ata_port *ap); 1173 extern int sata_async_notification(struct ata_port *ap); 1174 1175 extern void ata_eh_freeze_port(struct ata_port *ap); 1176 extern void ata_eh_thaw_port(struct ata_port *ap); 1177 1178 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1179 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1180 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1181 1182 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1183 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1184 ata_postreset_fn_t postreset); 1185 extern void ata_std_error_handler(struct ata_port *ap); 1186 extern void ata_std_sched_eh(struct ata_port *ap); 1187 extern void ata_std_end_eh(struct ata_port *ap); 1188 extern int ata_link_nr_enabled(struct ata_link *link); 1189 1190 /* 1191 * Base operations to inherit from and initializers for sht 1192 * 1193 * Operations 1194 * 1195 * base : Common to all libata drivers. 1196 * sata : SATA controllers w/ native interface. 1197 * pmp : SATA controllers w/ PMP support. 1198 * sff : SFF ATA controllers w/o BMDMA support. 1199 * bmdma : SFF ATA controllers w/ BMDMA support. 1200 * 1201 * sht initializers 1202 * 1203 * BASE : Common to all libata drivers. The user must set 1204 * sg_tablesize and dma_boundary. 1205 * PIO : SFF ATA controllers w/ only PIO support. 1206 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1207 * dma_boundary are set to BMDMA limits. 1208 * NCQ : SATA controllers supporting NCQ. The user must set 1209 * sg_tablesize, dma_boundary and can_queue. 1210 */ 1211 extern const struct ata_port_operations ata_base_port_ops; 1212 extern const struct ata_port_operations sata_port_ops; 1213 extern struct device_attribute *ata_common_sdev_attrs[]; 1214 1215 #define ATA_BASE_SHT(drv_name) \ 1216 .module = THIS_MODULE, \ 1217 .name = drv_name, \ 1218 .ioctl = ata_scsi_ioctl, \ 1219 .queuecommand = ata_scsi_queuecmd, \ 1220 .can_queue = ATA_DEF_QUEUE, \ 1221 .this_id = ATA_SHT_THIS_ID, \ 1222 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1223 .emulated = ATA_SHT_EMULATED, \ 1224 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1225 .proc_name = drv_name, \ 1226 .slave_configure = ata_scsi_slave_config, \ 1227 .slave_destroy = ata_scsi_slave_destroy, \ 1228 .bios_param = ata_std_bios_param, \ 1229 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \ 1230 .sdev_attrs = ata_common_sdev_attrs 1231 1232 #define ATA_NCQ_SHT(drv_name) \ 1233 ATA_BASE_SHT(drv_name), \ 1234 .change_queue_depth = ata_scsi_change_queue_depth 1235 1236 /* 1237 * PMP helpers 1238 */ 1239 #ifdef CONFIG_SATA_PMP 1240 static inline bool sata_pmp_supported(struct ata_port *ap) 1241 { 1242 return ap->flags & ATA_FLAG_PMP; 1243 } 1244 1245 static inline bool sata_pmp_attached(struct ata_port *ap) 1246 { 1247 return ap->nr_pmp_links != 0; 1248 } 1249 1250 static inline int ata_is_host_link(const struct ata_link *link) 1251 { 1252 return link == &link->ap->link || link == link->ap->slave_link; 1253 } 1254 #else /* CONFIG_SATA_PMP */ 1255 static inline bool sata_pmp_supported(struct ata_port *ap) 1256 { 1257 return false; 1258 } 1259 1260 static inline bool sata_pmp_attached(struct ata_port *ap) 1261 { 1262 return false; 1263 } 1264 1265 static inline int ata_is_host_link(const struct ata_link *link) 1266 { 1267 return 1; 1268 } 1269 #endif /* CONFIG_SATA_PMP */ 1270 1271 static inline int sata_srst_pmp(struct ata_link *link) 1272 { 1273 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1274 return SATA_PMP_CTRL_PORT; 1275 return link->pmp; 1276 } 1277 1278 /* 1279 * printk helpers 1280 */ 1281 __printf(3, 4) 1282 int ata_port_printk(const struct ata_port *ap, const char *level, 1283 const char *fmt, ...); 1284 __printf(3, 4) 1285 int ata_link_printk(const struct ata_link *link, const char *level, 1286 const char *fmt, ...); 1287 __printf(3, 4) 1288 int ata_dev_printk(const struct ata_device *dev, const char *level, 1289 const char *fmt, ...); 1290 1291 #define ata_port_err(ap, fmt, ...) \ 1292 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__) 1293 #define ata_port_warn(ap, fmt, ...) \ 1294 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__) 1295 #define ata_port_notice(ap, fmt, ...) \ 1296 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__) 1297 #define ata_port_info(ap, fmt, ...) \ 1298 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__) 1299 #define ata_port_dbg(ap, fmt, ...) \ 1300 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__) 1301 1302 #define ata_link_err(link, fmt, ...) \ 1303 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__) 1304 #define ata_link_warn(link, fmt, ...) \ 1305 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__) 1306 #define ata_link_notice(link, fmt, ...) \ 1307 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__) 1308 #define ata_link_info(link, fmt, ...) \ 1309 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__) 1310 #define ata_link_dbg(link, fmt, ...) \ 1311 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__) 1312 1313 #define ata_dev_err(dev, fmt, ...) \ 1314 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__) 1315 #define ata_dev_warn(dev, fmt, ...) \ 1316 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__) 1317 #define ata_dev_notice(dev, fmt, ...) \ 1318 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__) 1319 #define ata_dev_info(dev, fmt, ...) \ 1320 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__) 1321 #define ata_dev_dbg(dev, fmt, ...) \ 1322 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__) 1323 1324 void ata_print_version(const struct device *dev, const char *version); 1325 1326 /* 1327 * ata_eh_info helpers 1328 */ 1329 extern __printf(2, 3) 1330 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1331 extern __printf(2, 3) 1332 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1333 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1334 1335 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1336 { 1337 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1338 ehi->flags |= ATA_EHI_HOTPLUGGED; 1339 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1340 ehi->err_mask |= AC_ERR_ATA_BUS; 1341 } 1342 1343 /* 1344 * port description helpers 1345 */ 1346 extern __printf(2, 3) 1347 void ata_port_desc(struct ata_port *ap, const char *fmt, ...); 1348 #ifdef CONFIG_PCI 1349 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1350 const char *name); 1351 #endif 1352 1353 static inline unsigned int ata_tag_valid(unsigned int tag) 1354 { 1355 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1356 } 1357 1358 static inline unsigned int ata_tag_internal(unsigned int tag) 1359 { 1360 return tag == ATA_TAG_INTERNAL; 1361 } 1362 1363 /* 1364 * device helpers 1365 */ 1366 static inline unsigned int ata_class_enabled(unsigned int class) 1367 { 1368 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1369 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1370 } 1371 1372 static inline unsigned int ata_class_disabled(unsigned int class) 1373 { 1374 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1375 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1376 } 1377 1378 static inline unsigned int ata_class_absent(unsigned int class) 1379 { 1380 return !ata_class_enabled(class) && !ata_class_disabled(class); 1381 } 1382 1383 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1384 { 1385 return ata_class_enabled(dev->class); 1386 } 1387 1388 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1389 { 1390 return ata_class_disabled(dev->class); 1391 } 1392 1393 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1394 { 1395 return ata_class_absent(dev->class); 1396 } 1397 1398 /* 1399 * link helpers 1400 */ 1401 static inline int ata_link_max_devices(const struct ata_link *link) 1402 { 1403 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1404 return 2; 1405 return 1; 1406 } 1407 1408 static inline int ata_link_active(struct ata_link *link) 1409 { 1410 return ata_tag_valid(link->active_tag) || link->sactive; 1411 } 1412 1413 /* 1414 * Iterators 1415 * 1416 * ATA_LITER_* constants are used to select link iteration mode and 1417 * ATA_DITER_* device iteration mode. 1418 * 1419 * For a custom iteration directly using ata_{link|dev}_next(), if 1420 * @link or @dev, respectively, is NULL, the first element is 1421 * returned. @dev and @link can be any valid device or link and the 1422 * next element according to the iteration mode will be returned. 1423 * After the last element, NULL is returned. 1424 */ 1425 enum ata_link_iter_mode { 1426 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1427 * host link. no slave link */ 1428 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1429 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1430 * slave link still comes after host link */ 1431 }; 1432 1433 enum ata_dev_iter_mode { 1434 ATA_DITER_ENABLED, 1435 ATA_DITER_ENABLED_REVERSE, 1436 ATA_DITER_ALL, 1437 ATA_DITER_ALL_REVERSE, 1438 }; 1439 1440 extern struct ata_link *ata_link_next(struct ata_link *link, 1441 struct ata_port *ap, 1442 enum ata_link_iter_mode mode); 1443 1444 extern struct ata_device *ata_dev_next(struct ata_device *dev, 1445 struct ata_link *link, 1446 enum ata_dev_iter_mode mode); 1447 1448 /* 1449 * Shortcut notation for iterations 1450 * 1451 * ata_for_each_link() iterates over each link of @ap according to 1452 * @mode. @link points to the current link in the loop. @link is 1453 * NULL after loop termination. ata_for_each_dev() works the same way 1454 * except that it iterates over each device of @link. 1455 * 1456 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1457 * specified when using the following shorthand notations. Only the 1458 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1459 * specified. This not only increases brevity but also makes it 1460 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1461 */ 1462 #define ata_for_each_link(link, ap, mode) \ 1463 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1464 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1465 1466 #define ata_for_each_dev(dev, link, mode) \ 1467 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1468 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1469 1470 /** 1471 * ata_ncq_enabled - Test whether NCQ is enabled 1472 * @dev: ATA device to test for 1473 * 1474 * LOCKING: 1475 * spin_lock_irqsave(host lock) 1476 * 1477 * RETURNS: 1478 * 1 if NCQ is enabled for @dev, 0 otherwise. 1479 */ 1480 static inline int ata_ncq_enabled(struct ata_device *dev) 1481 { 1482 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1483 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1484 } 1485 1486 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1487 { 1488 qc->tf.ctl |= ATA_NIEN; 1489 } 1490 1491 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1492 unsigned int tag) 1493 { 1494 if (likely(ata_tag_valid(tag))) 1495 return &ap->qcmd[tag]; 1496 return NULL; 1497 } 1498 1499 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1500 unsigned int tag) 1501 { 1502 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1503 1504 if (unlikely(!qc) || !ap->ops->error_handler) 1505 return qc; 1506 1507 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1508 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1509 return qc; 1510 1511 return NULL; 1512 } 1513 1514 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1515 { 1516 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1517 } 1518 1519 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1520 { 1521 memset(tf, 0, sizeof(*tf)); 1522 1523 #ifdef CONFIG_ATA_SFF 1524 tf->ctl = dev->link->ap->ctl; 1525 #else 1526 tf->ctl = ATA_DEVCTL_OBS; 1527 #endif 1528 if (dev->devno == 0) 1529 tf->device = ATA_DEVICE_OBS; 1530 else 1531 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1532 } 1533 1534 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1535 { 1536 qc->dma_dir = DMA_NONE; 1537 qc->sg = NULL; 1538 qc->flags = 0; 1539 qc->cursg = NULL; 1540 qc->cursg_ofs = 0; 1541 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1542 qc->n_elem = 0; 1543 qc->err_mask = 0; 1544 qc->sect_size = ATA_SECT_SIZE; 1545 1546 ata_tf_init(qc->dev, &qc->tf); 1547 1548 /* init result_tf such that it indicates normal completion */ 1549 qc->result_tf.command = ATA_DRDY; 1550 qc->result_tf.feature = 0; 1551 } 1552 1553 static inline int ata_try_flush_cache(const struct ata_device *dev) 1554 { 1555 return ata_id_wcache_enabled(dev->id) || 1556 ata_id_has_flush(dev->id) || 1557 ata_id_has_flush_ext(dev->id); 1558 } 1559 1560 static inline unsigned int ac_err_mask(u8 status) 1561 { 1562 if (status & (ATA_BUSY | ATA_DRQ)) 1563 return AC_ERR_HSM; 1564 if (status & (ATA_ERR | ATA_DF)) 1565 return AC_ERR_DEV; 1566 return 0; 1567 } 1568 1569 static inline unsigned int __ac_err_mask(u8 status) 1570 { 1571 unsigned int mask = ac_err_mask(status); 1572 if (mask == 0) 1573 return AC_ERR_OTHER; 1574 return mask; 1575 } 1576 1577 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1578 { 1579 return *(struct ata_port **)&host->hostdata[0]; 1580 } 1581 1582 static inline int ata_check_ready(u8 status) 1583 { 1584 if (!(status & ATA_BUSY)) 1585 return 1; 1586 1587 /* 0xff indicates either no device or device not ready */ 1588 if (status == 0xff) 1589 return -ENODEV; 1590 1591 return 0; 1592 } 1593 1594 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1595 unsigned long timeout_msecs) 1596 { 1597 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1598 } 1599 1600 /* Don't open code these in drivers as there are traps. Firstly the range may 1601 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1602 > UDMA_0. Dyma ddreigiau */ 1603 1604 static inline int ata_using_mwdma(struct ata_device *adev) 1605 { 1606 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1607 return 1; 1608 return 0; 1609 } 1610 1611 static inline int ata_using_udma(struct ata_device *adev) 1612 { 1613 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1614 return 1; 1615 return 0; 1616 } 1617 1618 static inline int ata_dma_enabled(struct ata_device *adev) 1619 { 1620 return (adev->dma_mode == 0xFF ? 0 : 1); 1621 } 1622 1623 /************************************************************************** 1624 * PMP - drivers/ata/libata-pmp.c 1625 */ 1626 #ifdef CONFIG_SATA_PMP 1627 1628 extern const struct ata_port_operations sata_pmp_port_ops; 1629 1630 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1631 extern void sata_pmp_error_handler(struct ata_port *ap); 1632 1633 #else /* CONFIG_SATA_PMP */ 1634 1635 #define sata_pmp_port_ops sata_port_ops 1636 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1637 #define sata_pmp_error_handler ata_std_error_handler 1638 1639 #endif /* CONFIG_SATA_PMP */ 1640 1641 1642 /************************************************************************** 1643 * SFF - drivers/ata/libata-sff.c 1644 */ 1645 #ifdef CONFIG_ATA_SFF 1646 1647 extern const struct ata_port_operations ata_sff_port_ops; 1648 extern const struct ata_port_operations ata_bmdma32_port_ops; 1649 1650 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1651 #define ATA_PIO_SHT(drv_name) \ 1652 ATA_BASE_SHT(drv_name), \ 1653 .sg_tablesize = LIBATA_MAX_PRD, \ 1654 .dma_boundary = ATA_DMA_BOUNDARY 1655 1656 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1657 extern u8 ata_sff_check_status(struct ata_port *ap); 1658 extern void ata_sff_pause(struct ata_port *ap); 1659 extern void ata_sff_dma_pause(struct ata_port *ap); 1660 extern int ata_sff_busy_sleep(struct ata_port *ap, 1661 unsigned long timeout_pat, unsigned long timeout); 1662 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1663 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1664 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1665 extern void ata_sff_exec_command(struct ata_port *ap, 1666 const struct ata_taskfile *tf); 1667 extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1668 unsigned char *buf, unsigned int buflen, int rw); 1669 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1670 unsigned char *buf, unsigned int buflen, int rw); 1671 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1672 unsigned char *buf, unsigned int buflen, int rw); 1673 extern void ata_sff_irq_on(struct ata_port *ap); 1674 extern void ata_sff_irq_clear(struct ata_port *ap); 1675 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1676 u8 status, int in_wq); 1677 extern void ata_sff_queue_work(struct work_struct *work); 1678 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork, 1679 unsigned long delay); 1680 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay); 1681 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1682 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1683 extern unsigned int ata_sff_port_intr(struct ata_port *ap, 1684 struct ata_queued_cmd *qc); 1685 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1686 extern void ata_sff_lost_interrupt(struct ata_port *ap); 1687 extern void ata_sff_freeze(struct ata_port *ap); 1688 extern void ata_sff_thaw(struct ata_port *ap); 1689 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1690 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1691 u8 *r_err); 1692 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1693 unsigned long deadline); 1694 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1695 unsigned long deadline); 1696 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1697 unsigned long deadline); 1698 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1699 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1700 extern void ata_sff_error_handler(struct ata_port *ap); 1701 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1702 #ifdef CONFIG_PCI 1703 extern int ata_pci_sff_init_host(struct ata_host *host); 1704 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1705 const struct ata_port_info * const * ppi, 1706 struct ata_host **r_host); 1707 extern int ata_pci_sff_activate_host(struct ata_host *host, 1708 irq_handler_t irq_handler, 1709 struct scsi_host_template *sht); 1710 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1711 const struct ata_port_info * const * ppi, 1712 struct scsi_host_template *sht, void *host_priv, int hflags); 1713 #endif /* CONFIG_PCI */ 1714 1715 #ifdef CONFIG_ATA_BMDMA 1716 1717 extern const struct ata_port_operations ata_bmdma_port_ops; 1718 1719 #define ATA_BMDMA_SHT(drv_name) \ 1720 ATA_BASE_SHT(drv_name), \ 1721 .sg_tablesize = LIBATA_MAX_PRD, \ 1722 .dma_boundary = ATA_DMA_BOUNDARY 1723 1724 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc); 1725 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc); 1726 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc); 1727 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap, 1728 struct ata_queued_cmd *qc); 1729 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance); 1730 extern void ata_bmdma_error_handler(struct ata_port *ap); 1731 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 1732 extern void ata_bmdma_irq_clear(struct ata_port *ap); 1733 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1734 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1735 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1736 extern u8 ata_bmdma_status(struct ata_port *ap); 1737 extern int ata_bmdma_port_start(struct ata_port *ap); 1738 extern int ata_bmdma_port_start32(struct ata_port *ap); 1739 1740 #ifdef CONFIG_PCI 1741 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1742 extern void ata_pci_bmdma_init(struct ata_host *host); 1743 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev, 1744 const struct ata_port_info * const * ppi, 1745 struct ata_host **r_host); 1746 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev, 1747 const struct ata_port_info * const * ppi, 1748 struct scsi_host_template *sht, 1749 void *host_priv, int hflags); 1750 #endif /* CONFIG_PCI */ 1751 #endif /* CONFIG_ATA_BMDMA */ 1752 1753 /** 1754 * ata_sff_busy_wait - Wait for a port status register 1755 * @ap: Port to wait for. 1756 * @bits: bits that must be clear 1757 * @max: number of 10uS waits to perform 1758 * 1759 * Waits up to max*10 microseconds for the selected bits in the port's 1760 * status register to be cleared. 1761 * Returns final value of status register. 1762 * 1763 * LOCKING: 1764 * Inherited from caller. 1765 */ 1766 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1767 unsigned int max) 1768 { 1769 u8 status; 1770 1771 do { 1772 udelay(10); 1773 status = ap->ops->sff_check_status(ap); 1774 max--; 1775 } while (status != 0xff && (status & bits) && (max > 0)); 1776 1777 return status; 1778 } 1779 1780 /** 1781 * ata_wait_idle - Wait for a port to be idle. 1782 * @ap: Port to wait for. 1783 * 1784 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1785 * Returns final value of status register. 1786 * 1787 * LOCKING: 1788 * Inherited from caller. 1789 */ 1790 static inline u8 ata_wait_idle(struct ata_port *ap) 1791 { 1792 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1793 1794 #ifdef ATA_DEBUG 1795 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1796 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1797 status); 1798 #endif 1799 1800 return status; 1801 } 1802 #endif /* CONFIG_ATA_SFF */ 1803 1804 #endif /* __LINUX_LIBATA_H__ */ 1805