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_taskfile flags */ 142 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */ 143 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */ 144 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */ 145 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */ 146 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */ 147 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */ 148 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */ 149 150 /* protocol flags */ 151 ATA_PROT_FLAG_PIO = (1 << 0), /* is PIO */ 152 ATA_PROT_FLAG_DMA = (1 << 1), /* is DMA */ 153 ATA_PROT_FLAG_DATA = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA, 154 ATA_PROT_FLAG_NCQ = (1 << 2), /* is NCQ */ 155 ATA_PROT_FLAG_ATAPI = (1 << 3), /* is ATAPI */ 156 157 /* struct ata_device stuff */ 158 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 159 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 160 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 161 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 162 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 163 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 164 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 165 ATA_DFLAG_AN = (1 << 7), /* AN configured */ 166 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */ 167 ATA_DFLAG_CFG_MASK = (1 << 12) - 1, 168 169 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */ 170 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */ 171 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */ 172 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */ 173 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */ 174 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */ 175 ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */ 176 ATA_DFLAG_INIT_MASK = (1 << 24) - 1, 177 178 ATA_DFLAG_DETACH = (1 << 24), 179 ATA_DFLAG_DETACHED = (1 << 25), 180 181 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */ 182 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */ 183 ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */ 184 185 ATA_DEV_UNKNOWN = 0, /* unknown device */ 186 ATA_DEV_ATA = 1, /* ATA device */ 187 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 188 ATA_DEV_ATAPI = 3, /* ATAPI device */ 189 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 190 ATA_DEV_PMP = 5, /* SATA port multiplier */ 191 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 192 ATA_DEV_SEMB = 7, /* SEMB */ 193 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 194 ATA_DEV_ZAC = 9, /* ZAC device */ 195 ATA_DEV_NONE = 10, /* no device */ 196 197 /* struct ata_link flags */ 198 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ 199 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ 200 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ 201 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ 202 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 203 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 204 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 205 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */ 206 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */ 207 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */ 208 209 /* struct ata_port flags */ 210 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 211 /* (doesn't imply presence) */ 212 ATA_FLAG_SATA = (1 << 1), 213 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 214 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 215 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 216 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 217 * doesn't handle PIO interrupts */ 218 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 219 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ 220 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ 221 ATA_FLAG_DEBUGMSG = (1 << 13), 222 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */ 223 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 224 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 225 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 226 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 227 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 228 ATA_FLAG_FPDMA_AUX = (1 << 20), /* controller supports H2DFIS aux field */ 229 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 230 * management */ 231 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 232 * led */ 233 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */ 234 235 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 236 237 238 /* struct ata_port pflags */ 239 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 240 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 241 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 242 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 243 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 244 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 245 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 246 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 247 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 248 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 249 250 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 251 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 252 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 253 254 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 255 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 256 257 /* struct ata_queued_cmd flags */ 258 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 259 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 260 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 261 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 262 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 263 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 264 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 265 266 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 267 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 268 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 269 270 /* host set flags */ 271 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 272 ATA_HOST_STARTED = (1 << 1), /* Host started */ 273 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 274 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */ 275 276 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 277 278 /* various lengths of time */ 279 ATA_TMOUT_BOOT = 30000, /* heuristic */ 280 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 281 ATA_TMOUT_INTERNAL_QUICK = 5000, 282 ATA_TMOUT_MAX_PARK = 30000, 283 284 /* 285 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s 286 * is too much without parallel probing. Use 2s if parallel 287 * probing is available, 800ms otherwise. 288 */ 289 ATA_TMOUT_FF_WAIT_LONG = 2000, 290 ATA_TMOUT_FF_WAIT = 800, 291 292 /* Spec mandates to wait for ">= 2ms" before checking status 293 * after reset. We wait 150ms, because that was the magic 294 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 295 * the period of time between when the ATA command register is 296 * written, and then status is checked. Because waiting for 297 * "a while" before checking status is fine, post SRST, we 298 * perform this magic delay here as well. 299 * 300 * Old drivers/ide uses the 2mS rule and then waits for ready. 301 */ 302 ATA_WAIT_AFTER_RESET = 150, 303 304 /* If PMP is supported, we have to do follow-up SRST. As some 305 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 306 * advised to wait only for the following duration before 307 * doing SRST. 308 */ 309 ATA_TMOUT_PMP_SRST_WAIT = 5000, 310 311 /* ATA bus states */ 312 BUS_UNKNOWN = 0, 313 BUS_DMA = 1, 314 BUS_IDLE = 2, 315 BUS_NOINTR = 3, 316 BUS_NODATA = 4, 317 BUS_TIMER = 5, 318 BUS_PIO = 6, 319 BUS_EDD = 7, 320 BUS_IDENTIFY = 8, 321 BUS_PACKET = 9, 322 323 /* SATA port states */ 324 PORT_UNKNOWN = 0, 325 PORT_ENABLED = 1, 326 PORT_DISABLED = 2, 327 328 /* encoding various smaller bitmaps into a single 329 * unsigned long bitmap 330 */ 331 ATA_NR_PIO_MODES = 7, 332 ATA_NR_MWDMA_MODES = 5, 333 ATA_NR_UDMA_MODES = 8, 334 335 ATA_SHIFT_PIO = 0, 336 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 337 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 338 339 /* size of buffer to pad xfers ending on unaligned boundaries */ 340 ATA_DMA_PAD_SZ = 4, 341 342 /* ering size */ 343 ATA_ERING_SIZE = 32, 344 345 /* return values for ->qc_defer */ 346 ATA_DEFER_LINK = 1, 347 ATA_DEFER_PORT = 2, 348 349 /* desc_len for ata_eh_info and context */ 350 ATA_EH_DESC_LEN = 80, 351 352 /* reset / recovery action types */ 353 ATA_EH_REVALIDATE = (1 << 0), 354 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 355 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 356 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 357 ATA_EH_ENABLE_LINK = (1 << 3), 358 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 359 360 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 361 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 362 ATA_EH_ENABLE_LINK, 363 364 /* ata_eh_info->flags */ 365 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 366 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 367 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 368 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */ 369 370 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 371 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 372 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 373 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 374 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */ 375 376 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 377 378 /* mask of flags to transfer *to* the slave link */ 379 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 380 381 /* max tries if error condition is still set after ->error_handler */ 382 ATA_EH_MAX_TRIES = 5, 383 384 /* sometimes resuming a link requires several retries */ 385 ATA_LINK_RESUME_TRIES = 5, 386 387 /* how hard are we gonna try to probe/recover devices */ 388 ATA_PROBE_MAX_TRIES = 3, 389 ATA_EH_DEV_TRIES = 3, 390 ATA_EH_PMP_TRIES = 5, 391 ATA_EH_PMP_LINK_TRIES = 3, 392 393 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 394 395 /* This should match the actual table size of 396 * ata_eh_cmd_timeout_table in libata-eh.c. 397 */ 398 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6, 399 400 /* Horkage types. May be set by libata or controller on drives 401 (some horkage may be drive/controller pair dependent */ 402 403 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 404 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 405 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 406 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 407 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 408 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 409 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 410 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 411 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 412 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 413 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 414 not multiple of 16 bytes */ 415 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */ 416 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 417 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ 418 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ 419 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */ 420 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */ 421 ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */ 422 ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19), /* don't use queued TRIM */ 423 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */ 424 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */ 425 426 /* DMA mask for user DMA control: User visible values; DO NOT 427 renumber */ 428 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 429 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 430 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 431 432 /* ATAPI command types */ 433 ATAPI_READ = 0, /* READs */ 434 ATAPI_WRITE = 1, /* WRITEs */ 435 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 436 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 437 ATAPI_MISC = 4, /* the rest */ 438 439 /* Timing constants */ 440 ATA_TIMING_SETUP = (1 << 0), 441 ATA_TIMING_ACT8B = (1 << 1), 442 ATA_TIMING_REC8B = (1 << 2), 443 ATA_TIMING_CYC8B = (1 << 3), 444 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 445 ATA_TIMING_CYC8B, 446 ATA_TIMING_ACTIVE = (1 << 4), 447 ATA_TIMING_RECOVER = (1 << 5), 448 ATA_TIMING_DMACK_HOLD = (1 << 6), 449 ATA_TIMING_CYCLE = (1 << 7), 450 ATA_TIMING_UDMA = (1 << 8), 451 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 452 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 453 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 454 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 455 ATA_TIMING_UDMA, 456 457 /* ACPI constants */ 458 ATA_ACPI_FILTER_SETXFER = 1 << 0, 459 ATA_ACPI_FILTER_LOCK = 1 << 1, 460 ATA_ACPI_FILTER_DIPM = 1 << 2, 461 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 462 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 463 464 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 465 ATA_ACPI_FILTER_LOCK | 466 ATA_ACPI_FILTER_DIPM, 467 }; 468 469 enum ata_xfer_mask { 470 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 471 << ATA_SHIFT_PIO, 472 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 473 << ATA_SHIFT_MWDMA, 474 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 475 << ATA_SHIFT_UDMA, 476 }; 477 478 enum hsm_task_states { 479 HSM_ST_IDLE, /* no command on going */ 480 HSM_ST_FIRST, /* (waiting the device to) 481 write CDB or first data block */ 482 HSM_ST, /* (waiting the device to) transfer data */ 483 HSM_ST_LAST, /* (waiting the device to) complete command */ 484 HSM_ST_ERR, /* error */ 485 }; 486 487 enum ata_completion_errors { 488 AC_ERR_DEV = (1 << 0), /* device reported error */ 489 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 490 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 491 AC_ERR_MEDIA = (1 << 3), /* media error */ 492 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 493 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 494 AC_ERR_SYSTEM = (1 << 6), /* system error */ 495 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 496 AC_ERR_OTHER = (1 << 8), /* unknown */ 497 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 498 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 499 }; 500 501 /* 502 * Link power management policy: If you alter this, you also need to 503 * alter libata-scsi.c (for the ascii descriptions) 504 */ 505 enum ata_lpm_policy { 506 ATA_LPM_UNKNOWN, 507 ATA_LPM_MAX_POWER, 508 ATA_LPM_MED_POWER, 509 ATA_LPM_MIN_POWER, 510 }; 511 512 enum ata_lpm_hints { 513 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */ 514 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */ 515 }; 516 517 /* forward declarations */ 518 struct scsi_device; 519 struct ata_port_operations; 520 struct ata_port; 521 struct ata_link; 522 struct ata_queued_cmd; 523 524 /* typedefs */ 525 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 526 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 527 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 528 unsigned long deadline); 529 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 530 531 extern struct device_attribute dev_attr_link_power_management_policy; 532 extern struct device_attribute dev_attr_unload_heads; 533 extern struct device_attribute dev_attr_em_message_type; 534 extern struct device_attribute dev_attr_em_message; 535 extern struct device_attribute dev_attr_sw_activity; 536 537 enum sw_activity { 538 OFF, 539 BLINK_ON, 540 BLINK_OFF, 541 }; 542 543 struct ata_taskfile { 544 unsigned long flags; /* ATA_TFLAG_xxx */ 545 u8 protocol; /* ATA_PROT_xxx */ 546 547 u8 ctl; /* control reg */ 548 549 u8 hob_feature; /* additional data */ 550 u8 hob_nsect; /* to support LBA48 */ 551 u8 hob_lbal; 552 u8 hob_lbam; 553 u8 hob_lbah; 554 555 u8 feature; 556 u8 nsect; 557 u8 lbal; 558 u8 lbam; 559 u8 lbah; 560 561 u8 device; 562 563 u8 command; /* IO operation */ 564 565 u32 auxiliary; /* auxiliary field */ 566 /* from SATA 3.1 and */ 567 /* ATA-8 ACS-3 */ 568 }; 569 570 #ifdef CONFIG_ATA_SFF 571 struct ata_ioports { 572 void __iomem *cmd_addr; 573 void __iomem *data_addr; 574 void __iomem *error_addr; 575 void __iomem *feature_addr; 576 void __iomem *nsect_addr; 577 void __iomem *lbal_addr; 578 void __iomem *lbam_addr; 579 void __iomem *lbah_addr; 580 void __iomem *device_addr; 581 void __iomem *status_addr; 582 void __iomem *command_addr; 583 void __iomem *altstatus_addr; 584 void __iomem *ctl_addr; 585 #ifdef CONFIG_ATA_BMDMA 586 void __iomem *bmdma_addr; 587 #endif /* CONFIG_ATA_BMDMA */ 588 void __iomem *scr_addr; 589 }; 590 #endif /* CONFIG_ATA_SFF */ 591 592 struct ata_host { 593 spinlock_t lock; 594 struct device *dev; 595 void __iomem * const *iomap; 596 unsigned int n_ports; 597 unsigned int n_tags; /* nr of NCQ tags */ 598 void *private_data; 599 struct ata_port_operations *ops; 600 unsigned long flags; 601 602 struct mutex eh_mutex; 603 struct task_struct *eh_owner; 604 605 struct ata_port *simplex_claimed; /* channel owning the DMA */ 606 struct ata_port *ports[0]; 607 }; 608 609 struct ata_queued_cmd { 610 struct ata_port *ap; 611 struct ata_device *dev; 612 613 struct scsi_cmnd *scsicmd; 614 void (*scsidone)(struct scsi_cmnd *); 615 616 struct ata_taskfile tf; 617 u8 cdb[ATAPI_CDB_LEN]; 618 619 unsigned long flags; /* ATA_QCFLAG_xxx */ 620 unsigned int tag; 621 unsigned int n_elem; 622 unsigned int orig_n_elem; 623 624 int dma_dir; 625 626 unsigned int sect_size; 627 628 unsigned int nbytes; 629 unsigned int extrabytes; 630 unsigned int curbytes; 631 632 struct scatterlist sgent; 633 634 struct scatterlist *sg; 635 636 struct scatterlist *cursg; 637 unsigned int cursg_ofs; 638 639 unsigned int err_mask; 640 struct ata_taskfile result_tf; 641 ata_qc_cb_t complete_fn; 642 643 void *private_data; 644 void *lldd_task; 645 }; 646 647 struct ata_port_stats { 648 unsigned long unhandled_irq; 649 unsigned long idle_irq; 650 unsigned long rw_reqbuf; 651 }; 652 653 struct ata_ering_entry { 654 unsigned int eflags; 655 unsigned int err_mask; 656 u64 timestamp; 657 }; 658 659 struct ata_ering { 660 int cursor; 661 struct ata_ering_entry ring[ATA_ERING_SIZE]; 662 }; 663 664 struct ata_device { 665 struct ata_link *link; 666 unsigned int devno; /* 0 or 1 */ 667 unsigned int horkage; /* List of broken features */ 668 unsigned long flags; /* ATA_DFLAG_xxx */ 669 struct scsi_device *sdev; /* attached SCSI device */ 670 void *private_data; 671 #ifdef CONFIG_ATA_ACPI 672 union acpi_object *gtf_cache; 673 unsigned int gtf_filter; 674 #endif 675 #ifdef CONFIG_SATA_ZPODD 676 void *zpodd; 677 #endif 678 struct device tdev; 679 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 680 u64 n_sectors; /* size of device, if ATA */ 681 u64 n_native_sectors; /* native size, if ATA */ 682 unsigned int class; /* ATA_DEV_xxx */ 683 unsigned long unpark_deadline; 684 685 u8 pio_mode; 686 u8 dma_mode; 687 u8 xfer_mode; 688 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 689 690 unsigned int multi_count; /* sectors count for 691 READ/WRITE MULTIPLE */ 692 unsigned int max_sectors; /* per-device max sectors */ 693 unsigned int cdb_len; 694 695 /* per-dev xfer mask */ 696 unsigned long pio_mask; 697 unsigned long mwdma_mask; 698 unsigned long udma_mask; 699 700 /* for CHS addressing */ 701 u16 cylinders; /* Number of cylinders */ 702 u16 heads; /* Number of heads */ 703 u16 sectors; /* Number of sectors per track */ 704 705 union { 706 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 707 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 708 }; 709 710 /* DEVSLP Timing Variables from Identify Device Data Log */ 711 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE]; 712 713 /* NCQ send and receive log subcommand support */ 714 u8 ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE]; 715 716 /* error history */ 717 int spdn_cnt; 718 /* ering is CLEAR_END, read comment above CLEAR_END */ 719 struct ata_ering ering; 720 }; 721 722 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 723 * cleared to zero on ata_dev_init(). 724 */ 725 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 726 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 727 728 struct ata_eh_info { 729 struct ata_device *dev; /* offending device */ 730 u32 serror; /* SError from LLDD */ 731 unsigned int err_mask; /* port-wide err_mask */ 732 unsigned int action; /* ATA_EH_* action mask */ 733 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 734 unsigned int flags; /* ATA_EHI_* flags */ 735 736 unsigned int probe_mask; 737 738 char desc[ATA_EH_DESC_LEN]; 739 int desc_len; 740 }; 741 742 struct ata_eh_context { 743 struct ata_eh_info i; 744 int tries[ATA_MAX_DEVICES]; 745 int cmd_timeout_idx[ATA_MAX_DEVICES] 746 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 747 unsigned int classes[ATA_MAX_DEVICES]; 748 unsigned int did_probe_mask; 749 unsigned int unloaded_mask; 750 unsigned int saved_ncq_enabled; 751 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 752 /* timestamp for the last reset attempt or success */ 753 unsigned long last_reset; 754 }; 755 756 struct ata_acpi_drive 757 { 758 u32 pio; 759 u32 dma; 760 } __packed; 761 762 struct ata_acpi_gtm { 763 struct ata_acpi_drive drive[2]; 764 u32 flags; 765 } __packed; 766 767 struct ata_link { 768 struct ata_port *ap; 769 int pmp; /* port multiplier port # */ 770 771 struct device tdev; 772 unsigned int active_tag; /* active tag on this link */ 773 u32 sactive; /* active NCQ commands */ 774 775 unsigned int flags; /* ATA_LFLAG_xxx */ 776 777 u32 saved_scontrol; /* SControl on probe */ 778 unsigned int hw_sata_spd_limit; 779 unsigned int sata_spd_limit; 780 unsigned int sata_spd; /* current SATA PHY speed */ 781 enum ata_lpm_policy lpm_policy; 782 783 /* record runtime error info, protected by host_set lock */ 784 struct ata_eh_info eh_info; 785 /* EH context */ 786 struct ata_eh_context eh_context; 787 788 struct ata_device device[ATA_MAX_DEVICES]; 789 }; 790 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag) 791 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0]) 792 793 struct ata_port { 794 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 795 struct ata_port_operations *ops; 796 spinlock_t *lock; 797 /* Flags owned by the EH context. Only EH should touch these once the 798 port is active */ 799 unsigned long flags; /* ATA_FLAG_xxx */ 800 /* Flags that change dynamically, protected by ap->lock */ 801 unsigned int pflags; /* ATA_PFLAG_xxx */ 802 unsigned int print_id; /* user visible unique port ID */ 803 unsigned int local_port_no; /* host local port num */ 804 unsigned int port_no; /* 0 based port no. inside the host */ 805 806 #ifdef CONFIG_ATA_SFF 807 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 808 u8 ctl; /* cache of ATA control register */ 809 u8 last_ctl; /* Cache last written value */ 810 struct ata_link* sff_pio_task_link; /* link currently used */ 811 struct delayed_work sff_pio_task; 812 #ifdef CONFIG_ATA_BMDMA 813 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */ 814 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */ 815 #endif /* CONFIG_ATA_BMDMA */ 816 #endif /* CONFIG_ATA_SFF */ 817 818 unsigned int pio_mask; 819 unsigned int mwdma_mask; 820 unsigned int udma_mask; 821 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 822 823 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 824 unsigned long qc_allocated; 825 unsigned int qc_active; 826 int nr_active_links; /* #links with active qcs */ 827 unsigned int last_tag; /* track next tag hw expects */ 828 829 struct ata_link link; /* host default link */ 830 struct ata_link *slave_link; /* see ata_slave_link_init() */ 831 832 int nr_pmp_links; /* nr of available PMP links */ 833 struct ata_link *pmp_link; /* array of PMP links */ 834 struct ata_link *excl_link; /* for PMP qc exclusion */ 835 836 struct ata_port_stats stats; 837 struct ata_host *host; 838 struct device *dev; 839 struct device tdev; 840 841 struct mutex scsi_scan_mutex; 842 struct delayed_work hotplug_task; 843 struct work_struct scsi_rescan_task; 844 845 unsigned int hsm_task_state; 846 847 u32 msg_enable; 848 struct list_head eh_done_q; 849 wait_queue_head_t eh_wait_q; 850 int eh_tries; 851 struct completion park_req_pending; 852 853 pm_message_t pm_mesg; 854 enum ata_lpm_policy target_lpm_policy; 855 856 struct timer_list fastdrain_timer; 857 unsigned long fastdrain_cnt; 858 859 int em_message_type; 860 void *private_data; 861 862 #ifdef CONFIG_ATA_ACPI 863 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 864 #endif 865 /* owned by EH */ 866 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 867 }; 868 869 /* The following initializer overrides a method to NULL whether one of 870 * its parent has the method defined or not. This is equivalent to 871 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 872 * expression and thus can't be used as an initializer. 873 */ 874 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 875 876 struct ata_port_operations { 877 /* 878 * Command execution 879 */ 880 int (*qc_defer)(struct ata_queued_cmd *qc); 881 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 882 void (*qc_prep)(struct ata_queued_cmd *qc); 883 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 884 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 885 886 /* 887 * Configuration and exception handling 888 */ 889 int (*cable_detect)(struct ata_port *ap); 890 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 891 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 892 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 893 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 894 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 895 896 void (*dev_config)(struct ata_device *dev); 897 898 void (*freeze)(struct ata_port *ap); 899 void (*thaw)(struct ata_port *ap); 900 ata_prereset_fn_t prereset; 901 ata_reset_fn_t softreset; 902 ata_reset_fn_t hardreset; 903 ata_postreset_fn_t postreset; 904 ata_prereset_fn_t pmp_prereset; 905 ata_reset_fn_t pmp_softreset; 906 ata_reset_fn_t pmp_hardreset; 907 ata_postreset_fn_t pmp_postreset; 908 void (*error_handler)(struct ata_port *ap); 909 void (*lost_interrupt)(struct ata_port *ap); 910 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 911 void (*sched_eh)(struct ata_port *ap); 912 void (*end_eh)(struct ata_port *ap); 913 914 /* 915 * Optional features 916 */ 917 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 918 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 919 void (*pmp_attach)(struct ata_port *ap); 920 void (*pmp_detach)(struct ata_port *ap); 921 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy, 922 unsigned hints); 923 924 /* 925 * Start, stop, suspend and resume 926 */ 927 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 928 int (*port_resume)(struct ata_port *ap); 929 int (*port_start)(struct ata_port *ap); 930 void (*port_stop)(struct ata_port *ap); 931 void (*host_stop)(struct ata_host *host); 932 933 #ifdef CONFIG_ATA_SFF 934 /* 935 * SFF / taskfile oriented ops 936 */ 937 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 938 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl); 939 u8 (*sff_check_status)(struct ata_port *ap); 940 u8 (*sff_check_altstatus)(struct ata_port *ap); 941 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 942 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 943 void (*sff_exec_command)(struct ata_port *ap, 944 const struct ata_taskfile *tf); 945 unsigned int (*sff_data_xfer)(struct ata_device *dev, 946 unsigned char *buf, unsigned int buflen, int rw); 947 void (*sff_irq_on)(struct ata_port *); 948 bool (*sff_irq_check)(struct ata_port *); 949 void (*sff_irq_clear)(struct ata_port *); 950 void (*sff_drain_fifo)(struct ata_queued_cmd *qc); 951 952 #ifdef CONFIG_ATA_BMDMA 953 void (*bmdma_setup)(struct ata_queued_cmd *qc); 954 void (*bmdma_start)(struct ata_queued_cmd *qc); 955 void (*bmdma_stop)(struct ata_queued_cmd *qc); 956 u8 (*bmdma_status)(struct ata_port *ap); 957 #endif /* CONFIG_ATA_BMDMA */ 958 #endif /* CONFIG_ATA_SFF */ 959 960 ssize_t (*em_show)(struct ata_port *ap, char *buf); 961 ssize_t (*em_store)(struct ata_port *ap, const char *message, 962 size_t size); 963 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 964 ssize_t (*sw_activity_store)(struct ata_device *dev, 965 enum sw_activity val); 966 ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state, 967 ssize_t size); 968 969 /* 970 * Obsolete 971 */ 972 void (*phy_reset)(struct ata_port *ap); 973 void (*eng_timeout)(struct ata_port *ap); 974 975 /* 976 * ->inherits must be the last field and all the preceding 977 * fields must be pointers. 978 */ 979 const struct ata_port_operations *inherits; 980 }; 981 982 struct ata_port_info { 983 unsigned long flags; 984 unsigned long link_flags; 985 unsigned long pio_mask; 986 unsigned long mwdma_mask; 987 unsigned long udma_mask; 988 struct ata_port_operations *port_ops; 989 void *private_data; 990 }; 991 992 struct ata_timing { 993 unsigned short mode; /* ATA mode */ 994 unsigned short setup; /* t1 */ 995 unsigned short act8b; /* t2 for 8-bit I/O */ 996 unsigned short rec8b; /* t2i for 8-bit I/O */ 997 unsigned short cyc8b; /* t0 for 8-bit I/O */ 998 unsigned short active; /* t2 or tD */ 999 unsigned short recover; /* t2i or tK */ 1000 unsigned short dmack_hold; /* tj */ 1001 unsigned short cycle; /* t0 */ 1002 unsigned short udma; /* t2CYCTYP/2 */ 1003 }; 1004 1005 /* 1006 * Core layer - drivers/ata/libata-core.c 1007 */ 1008 extern const unsigned long sata_deb_timing_normal[]; 1009 extern const unsigned long sata_deb_timing_hotplug[]; 1010 extern const unsigned long sata_deb_timing_long[]; 1011 1012 extern struct ata_port_operations ata_dummy_port_ops; 1013 extern const struct ata_port_info ata_dummy_port_info; 1014 1015 /* 1016 * protocol tests 1017 */ 1018 static inline unsigned int ata_prot_flags(u8 prot) 1019 { 1020 switch (prot) { 1021 case ATA_PROT_NODATA: 1022 return 0; 1023 case ATA_PROT_PIO: 1024 return ATA_PROT_FLAG_PIO; 1025 case ATA_PROT_DMA: 1026 return ATA_PROT_FLAG_DMA; 1027 case ATA_PROT_NCQ: 1028 return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ; 1029 case ATAPI_PROT_NODATA: 1030 return ATA_PROT_FLAG_ATAPI; 1031 case ATAPI_PROT_PIO: 1032 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO; 1033 case ATAPI_PROT_DMA: 1034 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA; 1035 } 1036 return 0; 1037 } 1038 1039 static inline int ata_is_atapi(u8 prot) 1040 { 1041 return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI; 1042 } 1043 1044 static inline int ata_is_nodata(u8 prot) 1045 { 1046 return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA); 1047 } 1048 1049 static inline int ata_is_pio(u8 prot) 1050 { 1051 return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO; 1052 } 1053 1054 static inline int ata_is_dma(u8 prot) 1055 { 1056 return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA; 1057 } 1058 1059 static inline int ata_is_ncq(u8 prot) 1060 { 1061 return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ; 1062 } 1063 1064 static inline int ata_is_data(u8 prot) 1065 { 1066 return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA; 1067 } 1068 1069 static inline int is_multi_taskfile(struct ata_taskfile *tf) 1070 { 1071 return (tf->command == ATA_CMD_READ_MULTI) || 1072 (tf->command == ATA_CMD_WRITE_MULTI) || 1073 (tf->command == ATA_CMD_READ_MULTI_EXT) || 1074 (tf->command == ATA_CMD_WRITE_MULTI_EXT) || 1075 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT); 1076 } 1077 1078 static inline const unsigned long * 1079 sata_ehc_deb_timing(struct ata_eh_context *ehc) 1080 { 1081 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 1082 return sata_deb_timing_hotplug; 1083 else 1084 return sata_deb_timing_normal; 1085 } 1086 1087 static inline int ata_port_is_dummy(struct ata_port *ap) 1088 { 1089 return ap->ops == &ata_dummy_port_ops; 1090 } 1091 1092 extern int sata_set_spd(struct ata_link *link); 1093 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 1094 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 1095 int (*check_ready)(struct ata_link *link)); 1096 extern int sata_link_debounce(struct ata_link *link, 1097 const unsigned long *params, unsigned long deadline); 1098 extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 1099 unsigned long deadline); 1100 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, 1101 bool spm_wakeup); 1102 extern int sata_link_hardreset(struct ata_link *link, 1103 const unsigned long *timing, unsigned long deadline, 1104 bool *online, int (*check_ready)(struct ata_link *)); 1105 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 1106 unsigned long deadline); 1107 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 1108 1109 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 1110 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 1111 const struct ata_port_info * const * ppi, int n_ports); 1112 extern int ata_slave_link_init(struct ata_port *ap); 1113 extern int ata_host_start(struct ata_host *host); 1114 extern int ata_host_register(struct ata_host *host, 1115 struct scsi_host_template *sht); 1116 extern int ata_host_activate(struct ata_host *host, int irq, 1117 irq_handler_t irq_handler, unsigned long irq_flags, 1118 struct scsi_host_template *sht); 1119 extern void ata_host_detach(struct ata_host *host); 1120 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *); 1121 extern int ata_scsi_detect(struct scsi_host_template *sht); 1122 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 1123 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd); 1124 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 1125 int cmd, void __user *arg); 1126 extern void ata_sas_port_destroy(struct ata_port *); 1127 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 1128 struct ata_port_info *, struct Scsi_Host *); 1129 extern void ata_sas_async_probe(struct ata_port *ap); 1130 extern int ata_sas_sync_probe(struct ata_port *ap); 1131 extern int ata_sas_port_init(struct ata_port *); 1132 extern int ata_sas_port_start(struct ata_port *ap); 1133 extern void ata_sas_port_stop(struct ata_port *ap); 1134 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 1135 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap); 1136 extern int sata_scr_valid(struct ata_link *link); 1137 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 1138 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 1139 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 1140 extern bool ata_link_online(struct ata_link *link); 1141 extern bool ata_link_offline(struct ata_link *link); 1142 #ifdef CONFIG_PM 1143 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 1144 extern void ata_host_resume(struct ata_host *host); 1145 extern void ata_sas_port_suspend(struct ata_port *ap); 1146 extern void ata_sas_port_resume(struct ata_port *ap); 1147 #else 1148 static inline void ata_sas_port_suspend(struct ata_port *ap) 1149 { 1150 } 1151 static inline void ata_sas_port_resume(struct ata_port *ap) 1152 { 1153 } 1154 #endif 1155 extern int ata_ratelimit(void); 1156 extern void ata_msleep(struct ata_port *ap, unsigned int msecs); 1157 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, 1158 u32 val, unsigned long interval, unsigned long timeout); 1159 extern int atapi_cmd_type(u8 opcode); 1160 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 1161 u8 pmp, int is_cmd, u8 *fis); 1162 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 1163 extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 1164 unsigned long mwdma_mask, unsigned long udma_mask); 1165 extern void ata_unpack_xfermask(unsigned long xfer_mask, 1166 unsigned long *pio_mask, unsigned long *mwdma_mask, 1167 unsigned long *udma_mask); 1168 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 1169 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 1170 extern int ata_xfer_mode2shift(unsigned long xfer_mode); 1171 extern const char *ata_mode_string(unsigned long xfer_mask); 1172 extern unsigned long ata_id_xfermask(const u16 *id); 1173 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1174 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 1175 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1176 unsigned int n_elem); 1177 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1178 extern void ata_dev_disable(struct ata_device *adev); 1179 extern void ata_id_string(const u16 *id, unsigned char *s, 1180 unsigned int ofs, unsigned int len); 1181 extern void ata_id_c_string(const u16 *id, unsigned char *s, 1182 unsigned int ofs, unsigned int len); 1183 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1184 struct ata_taskfile *tf, u16 *id); 1185 extern void ata_qc_complete(struct ata_queued_cmd *qc); 1186 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); 1187 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd); 1188 extern int ata_std_bios_param(struct scsi_device *sdev, 1189 struct block_device *bdev, 1190 sector_t capacity, int geom[]); 1191 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev); 1192 extern int ata_scsi_slave_config(struct scsi_device *sdev); 1193 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1194 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1195 int queue_depth); 1196 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1197 int queue_depth); 1198 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1199 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1200 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap); 1201 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q); 1202 1203 extern int ata_cable_40wire(struct ata_port *ap); 1204 extern int ata_cable_80wire(struct ata_port *ap); 1205 extern int ata_cable_sata(struct ata_port *ap); 1206 extern int ata_cable_ignore(struct ata_port *ap); 1207 extern int ata_cable_unknown(struct ata_port *ap); 1208 1209 /* Timing helpers */ 1210 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1211 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1212 extern int ata_timing_compute(struct ata_device *, unsigned short, 1213 struct ata_timing *, int, int); 1214 extern void ata_timing_merge(const struct ata_timing *, 1215 const struct ata_timing *, struct ata_timing *, 1216 unsigned int); 1217 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1218 1219 /* PCI */ 1220 #ifdef CONFIG_PCI 1221 struct pci_dev; 1222 1223 struct pci_bits { 1224 unsigned int reg; /* PCI config register to read */ 1225 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1226 unsigned long mask; 1227 unsigned long val; 1228 }; 1229 1230 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1231 extern void ata_pci_remove_one(struct pci_dev *pdev); 1232 1233 #ifdef CONFIG_PM 1234 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1235 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1236 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1237 extern int ata_pci_device_resume(struct pci_dev *pdev); 1238 #endif /* CONFIG_PM */ 1239 #endif /* CONFIG_PCI */ 1240 1241 struct platform_device; 1242 1243 extern int ata_platform_remove_one(struct platform_device *pdev); 1244 1245 /* 1246 * ACPI - drivers/ata/libata-acpi.c 1247 */ 1248 #ifdef CONFIG_ATA_ACPI 1249 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1250 { 1251 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1252 return &ap->__acpi_init_gtm; 1253 return NULL; 1254 } 1255 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1256 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1257 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1258 const struct ata_acpi_gtm *gtm); 1259 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1260 #else 1261 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1262 { 1263 return NULL; 1264 } 1265 1266 static inline int ata_acpi_stm(const struct ata_port *ap, 1267 struct ata_acpi_gtm *stm) 1268 { 1269 return -ENOSYS; 1270 } 1271 1272 static inline int ata_acpi_gtm(const struct ata_port *ap, 1273 struct ata_acpi_gtm *stm) 1274 { 1275 return -ENOSYS; 1276 } 1277 1278 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1279 const struct ata_acpi_gtm *gtm) 1280 { 1281 return 0; 1282 } 1283 1284 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1285 const struct ata_acpi_gtm *gtm) 1286 { 1287 return 0; 1288 } 1289 #endif 1290 1291 /* 1292 * EH - drivers/ata/libata-eh.c 1293 */ 1294 extern void ata_port_schedule_eh(struct ata_port *ap); 1295 extern void ata_port_wait_eh(struct ata_port *ap); 1296 extern int ata_link_abort(struct ata_link *link); 1297 extern int ata_port_abort(struct ata_port *ap); 1298 extern int ata_port_freeze(struct ata_port *ap); 1299 extern int sata_async_notification(struct ata_port *ap); 1300 1301 extern void ata_eh_freeze_port(struct ata_port *ap); 1302 extern void ata_eh_thaw_port(struct ata_port *ap); 1303 1304 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1305 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1306 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1307 1308 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1309 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1310 ata_postreset_fn_t postreset); 1311 extern void ata_std_error_handler(struct ata_port *ap); 1312 extern void ata_std_sched_eh(struct ata_port *ap); 1313 extern void ata_std_end_eh(struct ata_port *ap); 1314 extern int ata_link_nr_enabled(struct ata_link *link); 1315 1316 /* 1317 * Base operations to inherit from and initializers for sht 1318 * 1319 * Operations 1320 * 1321 * base : Common to all libata drivers. 1322 * sata : SATA controllers w/ native interface. 1323 * pmp : SATA controllers w/ PMP support. 1324 * sff : SFF ATA controllers w/o BMDMA support. 1325 * bmdma : SFF ATA controllers w/ BMDMA support. 1326 * 1327 * sht initializers 1328 * 1329 * BASE : Common to all libata drivers. The user must set 1330 * sg_tablesize and dma_boundary. 1331 * PIO : SFF ATA controllers w/ only PIO support. 1332 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1333 * dma_boundary are set to BMDMA limits. 1334 * NCQ : SATA controllers supporting NCQ. The user must set 1335 * sg_tablesize, dma_boundary and can_queue. 1336 */ 1337 extern const struct ata_port_operations ata_base_port_ops; 1338 extern const struct ata_port_operations sata_port_ops; 1339 extern struct device_attribute *ata_common_sdev_attrs[]; 1340 1341 #define ATA_BASE_SHT(drv_name) \ 1342 .module = THIS_MODULE, \ 1343 .name = drv_name, \ 1344 .ioctl = ata_scsi_ioctl, \ 1345 .queuecommand = ata_scsi_queuecmd, \ 1346 .can_queue = ATA_DEF_QUEUE, \ 1347 .this_id = ATA_SHT_THIS_ID, \ 1348 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \ 1349 .emulated = ATA_SHT_EMULATED, \ 1350 .use_clustering = ATA_SHT_USE_CLUSTERING, \ 1351 .proc_name = drv_name, \ 1352 .slave_configure = ata_scsi_slave_config, \ 1353 .slave_destroy = ata_scsi_slave_destroy, \ 1354 .bios_param = ata_std_bios_param, \ 1355 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \ 1356 .sdev_attrs = ata_common_sdev_attrs 1357 1358 #define ATA_NCQ_SHT(drv_name) \ 1359 ATA_BASE_SHT(drv_name), \ 1360 .change_queue_depth = ata_scsi_change_queue_depth 1361 1362 /* 1363 * PMP helpers 1364 */ 1365 #ifdef CONFIG_SATA_PMP 1366 static inline bool sata_pmp_supported(struct ata_port *ap) 1367 { 1368 return ap->flags & ATA_FLAG_PMP; 1369 } 1370 1371 static inline bool sata_pmp_attached(struct ata_port *ap) 1372 { 1373 return ap->nr_pmp_links != 0; 1374 } 1375 1376 static inline int ata_is_host_link(const struct ata_link *link) 1377 { 1378 return link == &link->ap->link || link == link->ap->slave_link; 1379 } 1380 #else /* CONFIG_SATA_PMP */ 1381 static inline bool sata_pmp_supported(struct ata_port *ap) 1382 { 1383 return false; 1384 } 1385 1386 static inline bool sata_pmp_attached(struct ata_port *ap) 1387 { 1388 return false; 1389 } 1390 1391 static inline int ata_is_host_link(const struct ata_link *link) 1392 { 1393 return 1; 1394 } 1395 #endif /* CONFIG_SATA_PMP */ 1396 1397 static inline int sata_srst_pmp(struct ata_link *link) 1398 { 1399 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1400 return SATA_PMP_CTRL_PORT; 1401 return link->pmp; 1402 } 1403 1404 /* 1405 * printk helpers 1406 */ 1407 __printf(3, 4) 1408 void ata_port_printk(const struct ata_port *ap, const char *level, 1409 const char *fmt, ...); 1410 __printf(3, 4) 1411 void ata_link_printk(const struct ata_link *link, const char *level, 1412 const char *fmt, ...); 1413 __printf(3, 4) 1414 void ata_dev_printk(const struct ata_device *dev, const char *level, 1415 const char *fmt, ...); 1416 1417 #define ata_port_err(ap, fmt, ...) \ 1418 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__) 1419 #define ata_port_warn(ap, fmt, ...) \ 1420 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__) 1421 #define ata_port_notice(ap, fmt, ...) \ 1422 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__) 1423 #define ata_port_info(ap, fmt, ...) \ 1424 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__) 1425 #define ata_port_dbg(ap, fmt, ...) \ 1426 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__) 1427 1428 #define ata_link_err(link, fmt, ...) \ 1429 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__) 1430 #define ata_link_warn(link, fmt, ...) \ 1431 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__) 1432 #define ata_link_notice(link, fmt, ...) \ 1433 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__) 1434 #define ata_link_info(link, fmt, ...) \ 1435 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__) 1436 #define ata_link_dbg(link, fmt, ...) \ 1437 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__) 1438 1439 #define ata_dev_err(dev, fmt, ...) \ 1440 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__) 1441 #define ata_dev_warn(dev, fmt, ...) \ 1442 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__) 1443 #define ata_dev_notice(dev, fmt, ...) \ 1444 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__) 1445 #define ata_dev_info(dev, fmt, ...) \ 1446 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__) 1447 #define ata_dev_dbg(dev, fmt, ...) \ 1448 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__) 1449 1450 void ata_print_version(const struct device *dev, const char *version); 1451 1452 /* 1453 * ata_eh_info helpers 1454 */ 1455 extern __printf(2, 3) 1456 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1457 extern __printf(2, 3) 1458 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1459 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1460 1461 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1462 { 1463 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1464 ehi->flags |= ATA_EHI_HOTPLUGGED; 1465 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1466 ehi->err_mask |= AC_ERR_ATA_BUS; 1467 } 1468 1469 /* 1470 * port description helpers 1471 */ 1472 extern __printf(2, 3) 1473 void ata_port_desc(struct ata_port *ap, const char *fmt, ...); 1474 #ifdef CONFIG_PCI 1475 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1476 const char *name); 1477 #endif 1478 1479 static inline unsigned int ata_tag_valid(unsigned int tag) 1480 { 1481 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1482 } 1483 1484 static inline unsigned int ata_tag_internal(unsigned int tag) 1485 { 1486 return tag == ATA_TAG_INTERNAL; 1487 } 1488 1489 /* 1490 * device helpers 1491 */ 1492 static inline unsigned int ata_class_enabled(unsigned int class) 1493 { 1494 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1495 class == ATA_DEV_PMP || class == ATA_DEV_SEMB || 1496 class == ATA_DEV_ZAC; 1497 } 1498 1499 static inline unsigned int ata_class_disabled(unsigned int class) 1500 { 1501 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1502 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1503 } 1504 1505 static inline unsigned int ata_class_absent(unsigned int class) 1506 { 1507 return !ata_class_enabled(class) && !ata_class_disabled(class); 1508 } 1509 1510 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1511 { 1512 return ata_class_enabled(dev->class); 1513 } 1514 1515 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1516 { 1517 return ata_class_disabled(dev->class); 1518 } 1519 1520 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1521 { 1522 return ata_class_absent(dev->class); 1523 } 1524 1525 /* 1526 * link helpers 1527 */ 1528 static inline int ata_link_max_devices(const struct ata_link *link) 1529 { 1530 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1531 return 2; 1532 return 1; 1533 } 1534 1535 static inline int ata_link_active(struct ata_link *link) 1536 { 1537 return ata_tag_valid(link->active_tag) || link->sactive; 1538 } 1539 1540 /* 1541 * Iterators 1542 * 1543 * ATA_LITER_* constants are used to select link iteration mode and 1544 * ATA_DITER_* device iteration mode. 1545 * 1546 * For a custom iteration directly using ata_{link|dev}_next(), if 1547 * @link or @dev, respectively, is NULL, the first element is 1548 * returned. @dev and @link can be any valid device or link and the 1549 * next element according to the iteration mode will be returned. 1550 * After the last element, NULL is returned. 1551 */ 1552 enum ata_link_iter_mode { 1553 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1554 * host link. no slave link */ 1555 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1556 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1557 * slave link still comes after host link */ 1558 }; 1559 1560 enum ata_dev_iter_mode { 1561 ATA_DITER_ENABLED, 1562 ATA_DITER_ENABLED_REVERSE, 1563 ATA_DITER_ALL, 1564 ATA_DITER_ALL_REVERSE, 1565 }; 1566 1567 extern struct ata_link *ata_link_next(struct ata_link *link, 1568 struct ata_port *ap, 1569 enum ata_link_iter_mode mode); 1570 1571 extern struct ata_device *ata_dev_next(struct ata_device *dev, 1572 struct ata_link *link, 1573 enum ata_dev_iter_mode mode); 1574 1575 /* 1576 * Shortcut notation for iterations 1577 * 1578 * ata_for_each_link() iterates over each link of @ap according to 1579 * @mode. @link points to the current link in the loop. @link is 1580 * NULL after loop termination. ata_for_each_dev() works the same way 1581 * except that it iterates over each device of @link. 1582 * 1583 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1584 * specified when using the following shorthand notations. Only the 1585 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1586 * specified. This not only increases brevity but also makes it 1587 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1588 */ 1589 #define ata_for_each_link(link, ap, mode) \ 1590 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1591 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1592 1593 #define ata_for_each_dev(dev, link, mode) \ 1594 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1595 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1596 1597 /** 1598 * ata_ncq_enabled - Test whether NCQ is enabled 1599 * @dev: ATA device to test for 1600 * 1601 * LOCKING: 1602 * spin_lock_irqsave(host lock) 1603 * 1604 * RETURNS: 1605 * 1 if NCQ is enabled for @dev, 0 otherwise. 1606 */ 1607 static inline int ata_ncq_enabled(struct ata_device *dev) 1608 { 1609 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1610 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1611 } 1612 1613 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev) 1614 { 1615 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) && 1616 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] & 1617 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM); 1618 } 1619 1620 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1621 { 1622 qc->tf.ctl |= ATA_NIEN; 1623 } 1624 1625 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1626 unsigned int tag) 1627 { 1628 if (likely(ata_tag_valid(tag))) 1629 return &ap->qcmd[tag]; 1630 return NULL; 1631 } 1632 1633 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1634 unsigned int tag) 1635 { 1636 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1637 1638 if (unlikely(!qc) || !ap->ops->error_handler) 1639 return qc; 1640 1641 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1642 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1643 return qc; 1644 1645 return NULL; 1646 } 1647 1648 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1649 { 1650 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1651 } 1652 1653 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1654 { 1655 memset(tf, 0, sizeof(*tf)); 1656 1657 #ifdef CONFIG_ATA_SFF 1658 tf->ctl = dev->link->ap->ctl; 1659 #else 1660 tf->ctl = ATA_DEVCTL_OBS; 1661 #endif 1662 if (dev->devno == 0) 1663 tf->device = ATA_DEVICE_OBS; 1664 else 1665 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1666 } 1667 1668 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1669 { 1670 qc->dma_dir = DMA_NONE; 1671 qc->sg = NULL; 1672 qc->flags = 0; 1673 qc->cursg = NULL; 1674 qc->cursg_ofs = 0; 1675 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1676 qc->n_elem = 0; 1677 qc->err_mask = 0; 1678 qc->sect_size = ATA_SECT_SIZE; 1679 1680 ata_tf_init(qc->dev, &qc->tf); 1681 1682 /* init result_tf such that it indicates normal completion */ 1683 qc->result_tf.command = ATA_DRDY; 1684 qc->result_tf.feature = 0; 1685 } 1686 1687 static inline int ata_try_flush_cache(const struct ata_device *dev) 1688 { 1689 return ata_id_wcache_enabled(dev->id) || 1690 ata_id_has_flush(dev->id) || 1691 ata_id_has_flush_ext(dev->id); 1692 } 1693 1694 static inline unsigned int ac_err_mask(u8 status) 1695 { 1696 if (status & (ATA_BUSY | ATA_DRQ)) 1697 return AC_ERR_HSM; 1698 if (status & (ATA_ERR | ATA_DF)) 1699 return AC_ERR_DEV; 1700 return 0; 1701 } 1702 1703 static inline unsigned int __ac_err_mask(u8 status) 1704 { 1705 unsigned int mask = ac_err_mask(status); 1706 if (mask == 0) 1707 return AC_ERR_OTHER; 1708 return mask; 1709 } 1710 1711 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1712 { 1713 return *(struct ata_port **)&host->hostdata[0]; 1714 } 1715 1716 static inline int ata_check_ready(u8 status) 1717 { 1718 if (!(status & ATA_BUSY)) 1719 return 1; 1720 1721 /* 0xff indicates either no device or device not ready */ 1722 if (status == 0xff) 1723 return -ENODEV; 1724 1725 return 0; 1726 } 1727 1728 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1729 unsigned long timeout_msecs) 1730 { 1731 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1732 } 1733 1734 /* Don't open code these in drivers as there are traps. Firstly the range may 1735 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1736 > UDMA_0. Dyma ddreigiau */ 1737 1738 static inline int ata_using_mwdma(struct ata_device *adev) 1739 { 1740 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1741 return 1; 1742 return 0; 1743 } 1744 1745 static inline int ata_using_udma(struct ata_device *adev) 1746 { 1747 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1748 return 1; 1749 return 0; 1750 } 1751 1752 static inline int ata_dma_enabled(struct ata_device *adev) 1753 { 1754 return (adev->dma_mode == 0xFF ? 0 : 1); 1755 } 1756 1757 /************************************************************************** 1758 * PMP - drivers/ata/libata-pmp.c 1759 */ 1760 #ifdef CONFIG_SATA_PMP 1761 1762 extern const struct ata_port_operations sata_pmp_port_ops; 1763 1764 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1765 extern void sata_pmp_error_handler(struct ata_port *ap); 1766 1767 #else /* CONFIG_SATA_PMP */ 1768 1769 #define sata_pmp_port_ops sata_port_ops 1770 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1771 #define sata_pmp_error_handler ata_std_error_handler 1772 1773 #endif /* CONFIG_SATA_PMP */ 1774 1775 1776 /************************************************************************** 1777 * SFF - drivers/ata/libata-sff.c 1778 */ 1779 #ifdef CONFIG_ATA_SFF 1780 1781 extern const struct ata_port_operations ata_sff_port_ops; 1782 extern const struct ata_port_operations ata_bmdma32_port_ops; 1783 1784 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1785 #define ATA_PIO_SHT(drv_name) \ 1786 ATA_BASE_SHT(drv_name), \ 1787 .sg_tablesize = LIBATA_MAX_PRD, \ 1788 .dma_boundary = ATA_DMA_BOUNDARY 1789 1790 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1791 extern u8 ata_sff_check_status(struct ata_port *ap); 1792 extern void ata_sff_pause(struct ata_port *ap); 1793 extern void ata_sff_dma_pause(struct ata_port *ap); 1794 extern int ata_sff_busy_sleep(struct ata_port *ap, 1795 unsigned long timeout_pat, unsigned long timeout); 1796 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1797 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1798 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1799 extern void ata_sff_exec_command(struct ata_port *ap, 1800 const struct ata_taskfile *tf); 1801 extern unsigned int ata_sff_data_xfer(struct ata_device *dev, 1802 unsigned char *buf, unsigned int buflen, int rw); 1803 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev, 1804 unsigned char *buf, unsigned int buflen, int rw); 1805 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, 1806 unsigned char *buf, unsigned int buflen, int rw); 1807 extern void ata_sff_irq_on(struct ata_port *ap); 1808 extern void ata_sff_irq_clear(struct ata_port *ap); 1809 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1810 u8 status, int in_wq); 1811 extern void ata_sff_queue_work(struct work_struct *work); 1812 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork, 1813 unsigned long delay); 1814 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay); 1815 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1816 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1817 extern unsigned int ata_sff_port_intr(struct ata_port *ap, 1818 struct ata_queued_cmd *qc); 1819 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1820 extern void ata_sff_lost_interrupt(struct ata_port *ap); 1821 extern void ata_sff_freeze(struct ata_port *ap); 1822 extern void ata_sff_thaw(struct ata_port *ap); 1823 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1824 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1825 u8 *r_err); 1826 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1827 unsigned long deadline); 1828 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1829 unsigned long deadline); 1830 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1831 unsigned long deadline); 1832 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1833 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1834 extern void ata_sff_error_handler(struct ata_port *ap); 1835 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1836 #ifdef CONFIG_PCI 1837 extern int ata_pci_sff_init_host(struct ata_host *host); 1838 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1839 const struct ata_port_info * const * ppi, 1840 struct ata_host **r_host); 1841 extern int ata_pci_sff_activate_host(struct ata_host *host, 1842 irq_handler_t irq_handler, 1843 struct scsi_host_template *sht); 1844 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1845 const struct ata_port_info * const * ppi, 1846 struct scsi_host_template *sht, void *host_priv, int hflags); 1847 #endif /* CONFIG_PCI */ 1848 1849 #ifdef CONFIG_ATA_BMDMA 1850 1851 extern const struct ata_port_operations ata_bmdma_port_ops; 1852 1853 #define ATA_BMDMA_SHT(drv_name) \ 1854 ATA_BASE_SHT(drv_name), \ 1855 .sg_tablesize = LIBATA_MAX_PRD, \ 1856 .dma_boundary = ATA_DMA_BOUNDARY 1857 1858 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc); 1859 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc); 1860 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc); 1861 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap, 1862 struct ata_queued_cmd *qc); 1863 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance); 1864 extern void ata_bmdma_error_handler(struct ata_port *ap); 1865 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 1866 extern void ata_bmdma_irq_clear(struct ata_port *ap); 1867 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1868 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1869 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1870 extern u8 ata_bmdma_status(struct ata_port *ap); 1871 extern int ata_bmdma_port_start(struct ata_port *ap); 1872 extern int ata_bmdma_port_start32(struct ata_port *ap); 1873 1874 #ifdef CONFIG_PCI 1875 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1876 extern void ata_pci_bmdma_init(struct ata_host *host); 1877 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev, 1878 const struct ata_port_info * const * ppi, 1879 struct ata_host **r_host); 1880 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev, 1881 const struct ata_port_info * const * ppi, 1882 struct scsi_host_template *sht, 1883 void *host_priv, int hflags); 1884 #endif /* CONFIG_PCI */ 1885 #endif /* CONFIG_ATA_BMDMA */ 1886 1887 /** 1888 * ata_sff_busy_wait - Wait for a port status register 1889 * @ap: Port to wait for. 1890 * @bits: bits that must be clear 1891 * @max: number of 10uS waits to perform 1892 * 1893 * Waits up to max*10 microseconds for the selected bits in the port's 1894 * status register to be cleared. 1895 * Returns final value of status register. 1896 * 1897 * LOCKING: 1898 * Inherited from caller. 1899 */ 1900 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 1901 unsigned int max) 1902 { 1903 u8 status; 1904 1905 do { 1906 udelay(10); 1907 status = ap->ops->sff_check_status(ap); 1908 max--; 1909 } while (status != 0xff && (status & bits) && (max > 0)); 1910 1911 return status; 1912 } 1913 1914 /** 1915 * ata_wait_idle - Wait for a port to be idle. 1916 * @ap: Port to wait for. 1917 * 1918 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1919 * Returns final value of status register. 1920 * 1921 * LOCKING: 1922 * Inherited from caller. 1923 */ 1924 static inline u8 ata_wait_idle(struct ata_port *ap) 1925 { 1926 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1927 1928 #ifdef ATA_DEBUG 1929 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1930 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1931 status); 1932 #endif 1933 1934 return status; 1935 } 1936 #endif /* CONFIG_ATA_SFF */ 1937 1938 #endif /* __LINUX_LIBATA_H__ */ 1939