1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright 2003-2005 Red Hat, Inc. All rights reserved. 4 * Copyright 2003-2005 Jeff Garzik 5 * 6 * libata documentation is available via 'make {ps|pdf}docs', 7 * as Documentation/driver-api/libata.rst 8 */ 9 10 #ifndef __LINUX_LIBATA_H__ 11 #define __LINUX_LIBATA_H__ 12 13 #include <linux/delay.h> 14 #include <linux/jiffies.h> 15 #include <linux/interrupt.h> 16 #include <linux/dma-mapping.h> 17 #include <linux/scatterlist.h> 18 #include <linux/io.h> 19 #include <linux/ata.h> 20 #include <linux/workqueue.h> 21 #include <scsi/scsi_host.h> 22 #include <linux/acpi.h> 23 #include <linux/cdrom.h> 24 #include <linux/sched.h> 25 #include <linux/async.h> 26 27 /* 28 * Define if arch has non-standard setup. This is a _PCI_ standard 29 * not a legacy or ISA standard. 30 */ 31 #ifdef CONFIG_ATA_NONSTANDARD 32 #include <asm/libata-portmap.h> 33 #else 34 #define ATA_PRIMARY_IRQ(dev) 14 35 #define ATA_SECONDARY_IRQ(dev) 15 36 #endif 37 38 /* 39 * compile-time options: to be removed as soon as all the drivers are 40 * converted to the new debugging mechanism 41 */ 42 #undef ATA_DEBUG /* debugging output */ 43 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 44 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 45 #undef ATA_NDEBUG /* define to disable quick runtime checks */ 46 47 48 /* note: prints function name for you */ 49 #ifdef ATA_DEBUG 50 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) 51 #ifdef ATA_VERBOSE_DEBUG 52 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) 53 #else 54 #define VPRINTK(fmt, args...) 55 #endif /* ATA_VERBOSE_DEBUG */ 56 #else 57 #define DPRINTK(fmt, args...) 58 #define VPRINTK(fmt, args...) 59 #endif /* ATA_DEBUG */ 60 61 #define ata_print_version_once(dev, version) \ 62 ({ \ 63 static bool __print_once; \ 64 \ 65 if (!__print_once) { \ 66 __print_once = true; \ 67 ata_print_version(dev, version); \ 68 } \ 69 }) 70 71 /* NEW: debug levels */ 72 #define HAVE_LIBATA_MSG 1 73 74 enum { 75 ATA_MSG_DRV = 0x0001, 76 ATA_MSG_INFO = 0x0002, 77 ATA_MSG_PROBE = 0x0004, 78 ATA_MSG_WARN = 0x0008, 79 ATA_MSG_MALLOC = 0x0010, 80 ATA_MSG_CTL = 0x0020, 81 ATA_MSG_INTR = 0x0040, 82 ATA_MSG_ERR = 0x0080, 83 }; 84 85 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 86 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 87 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 88 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 89 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 90 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 91 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 92 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 93 94 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 95 { 96 if (dval < 0 || dval >= (sizeof(u32) * 8)) 97 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 98 if (!dval) 99 return 0; 100 return (1 << dval) - 1; 101 } 102 103 /* defines only for the constants which don't work well as enums */ 104 #define ATA_TAG_POISON 0xfafbfcfdU 105 106 enum { 107 /* various global constants */ 108 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 109 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ 110 ATA_DEF_QUEUE = 1, 111 ATA_MAX_QUEUE = 32, 112 ATA_TAG_INTERNAL = ATA_MAX_QUEUE, 113 ATA_SHORT_PAUSE = 16, 114 115 ATAPI_MAX_DRAIN = 16 << 10, 116 117 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1, 118 119 ATA_SHT_EMULATED = 1, 120 ATA_SHT_THIS_ID = -1, 121 122 /* struct ata_taskfile flags */ 123 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */ 124 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */ 125 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */ 126 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */ 127 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */ 128 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */ 129 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */ 130 131 /* struct ata_device stuff */ 132 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 133 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 134 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 135 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 136 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 137 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 138 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 139 ATA_DFLAG_AN = (1 << 7), /* AN configured */ 140 ATA_DFLAG_TRUSTED = (1 << 8), /* device supports trusted send/recv */ 141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */ 142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1, 143 144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */ 145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */ 146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */ 147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */ 148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */ 149 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */ 150 ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */ 151 ATA_DFLAG_NCQ_PRIO = (1 << 20), /* device supports NCQ priority */ 152 ATA_DFLAG_NCQ_PRIO_ENABLE = (1 << 21), /* Priority cmds sent to dev */ 153 ATA_DFLAG_INIT_MASK = (1 << 24) - 1, 154 155 ATA_DFLAG_DETACH = (1 << 24), 156 ATA_DFLAG_DETACHED = (1 << 25), 157 158 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */ 159 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */ 160 ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */ 161 ATA_DFLAG_D_SENSE = (1 << 29), /* Descriptor sense requested */ 162 ATA_DFLAG_ZAC = (1 << 30), /* ZAC device */ 163 164 ATA_DFLAG_FEATURES_MASK = ATA_DFLAG_TRUSTED | ATA_DFLAG_DA | \ 165 ATA_DFLAG_DEVSLP | ATA_DFLAG_NCQ_SEND_RECV | \ 166 ATA_DFLAG_NCQ_PRIO, 167 168 ATA_DEV_UNKNOWN = 0, /* unknown device */ 169 ATA_DEV_ATA = 1, /* ATA device */ 170 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 171 ATA_DEV_ATAPI = 3, /* ATAPI device */ 172 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 173 ATA_DEV_PMP = 5, /* SATA port multiplier */ 174 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 175 ATA_DEV_SEMB = 7, /* SEMB */ 176 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 177 ATA_DEV_ZAC = 9, /* ZAC device */ 178 ATA_DEV_ZAC_UNSUP = 10, /* ZAC device (unsupported) */ 179 ATA_DEV_NONE = 11, /* no device */ 180 181 /* struct ata_link flags */ 182 /* NOTE: struct ata_force_param currently stores lflags in u16 */ 183 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ 184 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */ 185 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */ 186 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */ 187 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 188 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 189 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 190 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */ 191 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */ 192 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */ 193 ATA_LFLAG_CHANGED = (1 << 10), /* LPM state changed on this link */ 194 ATA_LFLAG_NO_DB_DELAY = (1 << 11), /* no debounce delay on link resume */ 195 196 /* struct ata_port flags */ 197 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 198 /* (doesn't imply presence) */ 199 ATA_FLAG_SATA = (1 << 1), 200 ATA_FLAG_NO_LPM = (1 << 2), /* host not happy with LPM */ 201 ATA_FLAG_NO_LOG_PAGE = (1 << 5), /* do not issue log page read */ 202 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 203 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 204 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 205 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 206 * doesn't handle PIO interrupts */ 207 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 208 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */ 209 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */ 210 ATA_FLAG_DEBUGMSG = (1 << 13), 211 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */ 212 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 213 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 214 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 215 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 216 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 217 ATA_FLAG_FPDMA_AUX = (1 << 20), /* controller supports H2DFIS aux field */ 218 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure 219 * management */ 220 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity 221 * led */ 222 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */ 223 ATA_FLAG_SAS_HOST = (1 << 24), /* SAS host */ 224 225 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 226 227 228 /* struct ata_port pflags */ 229 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 230 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 231 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 232 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 233 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 234 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 235 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 236 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ 237 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ 238 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ 239 240 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 241 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 242 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ 243 244 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */ 245 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */ 246 ATA_PFLAG_EXTERNAL = (1 << 22), /* eSATA/external port */ 247 248 /* struct ata_queued_cmd flags */ 249 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 250 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */ 251 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 252 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 253 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */ 254 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */ 255 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */ 256 257 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 258 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 259 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 260 261 /* host set flags */ 262 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 263 ATA_HOST_STARTED = (1 << 1), /* Host started */ 264 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */ 265 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */ 266 267 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 268 269 /* various lengths of time */ 270 ATA_TMOUT_BOOT = 30000, /* heuristic */ 271 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */ 272 ATA_TMOUT_INTERNAL_QUICK = 5000, 273 ATA_TMOUT_MAX_PARK = 30000, 274 275 /* 276 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s 277 * is too much without parallel probing. Use 2s if parallel 278 * probing is available, 800ms otherwise. 279 */ 280 ATA_TMOUT_FF_WAIT_LONG = 2000, 281 ATA_TMOUT_FF_WAIT = 800, 282 283 /* Spec mandates to wait for ">= 2ms" before checking status 284 * after reset. We wait 150ms, because that was the magic 285 * delay used for ATAPI devices in Hale Landis's ATADRVR, for 286 * the period of time between when the ATA command register is 287 * written, and then status is checked. Because waiting for 288 * "a while" before checking status is fine, post SRST, we 289 * perform this magic delay here as well. 290 * 291 * Old drivers/ide uses the 2mS rule and then waits for ready. 292 */ 293 ATA_WAIT_AFTER_RESET = 150, 294 295 /* If PMP is supported, we have to do follow-up SRST. As some 296 * PMPs don't send D2H Reg FIS after hardreset, LLDs are 297 * advised to wait only for the following duration before 298 * doing SRST. 299 */ 300 ATA_TMOUT_PMP_SRST_WAIT = 5000, 301 302 /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might 303 * be a spurious PHY event, so ignore the first PHY event that 304 * occurs within 10s after the policy change. 305 */ 306 ATA_TMOUT_SPURIOUS_PHY = 10000, 307 308 /* ATA bus states */ 309 BUS_UNKNOWN = 0, 310 BUS_DMA = 1, 311 BUS_IDLE = 2, 312 BUS_NOINTR = 3, 313 BUS_NODATA = 4, 314 BUS_TIMER = 5, 315 BUS_PIO = 6, 316 BUS_EDD = 7, 317 BUS_IDENTIFY = 8, 318 BUS_PACKET = 9, 319 320 /* SATA port states */ 321 PORT_UNKNOWN = 0, 322 PORT_ENABLED = 1, 323 PORT_DISABLED = 2, 324 325 /* encoding various smaller bitmaps into a single 326 * unsigned long bitmap 327 */ 328 ATA_NR_PIO_MODES = 7, 329 ATA_NR_MWDMA_MODES = 5, 330 ATA_NR_UDMA_MODES = 8, 331 332 ATA_SHIFT_PIO = 0, 333 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, 334 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, 335 ATA_SHIFT_PRIO = 6, 336 337 ATA_PRIO_HIGH = 2, 338 /* size of buffer to pad xfers ending on unaligned boundaries */ 339 ATA_DMA_PAD_SZ = 4, 340 341 /* ering size */ 342 ATA_ERING_SIZE = 32, 343 344 /* return values for ->qc_defer */ 345 ATA_DEFER_LINK = 1, 346 ATA_DEFER_PORT = 2, 347 348 /* desc_len for ata_eh_info and context */ 349 ATA_EH_DESC_LEN = 80, 350 351 /* reset / recovery action types */ 352 ATA_EH_REVALIDATE = (1 << 0), 353 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */ 354 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */ 355 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 356 ATA_EH_ENABLE_LINK = (1 << 3), 357 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ 358 359 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK, 360 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | 361 ATA_EH_ENABLE_LINK, 362 363 /* ata_eh_info->flags */ 364 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 365 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 366 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 367 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */ 368 369 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 370 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 371 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 372 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 373 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */ 374 375 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 376 377 /* mask of flags to transfer *to* the slave link */ 378 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 379 380 /* max tries if error condition is still set after ->error_handler */ 381 ATA_EH_MAX_TRIES = 5, 382 383 /* sometimes resuming a link requires several retries */ 384 ATA_LINK_RESUME_TRIES = 5, 385 386 /* how hard are we gonna try to probe/recover devices */ 387 ATA_PROBE_MAX_TRIES = 3, 388 ATA_EH_DEV_TRIES = 3, 389 ATA_EH_PMP_TRIES = 5, 390 ATA_EH_PMP_LINK_TRIES = 3, 391 392 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */ 393 394 /* This should match the actual table size of 395 * ata_eh_cmd_timeout_table in libata-eh.c. 396 */ 397 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6, 398 399 /* Horkage types. May be set by libata or controller on drives 400 (some horkage may be drive/controller pair dependent */ 401 402 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 403 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 404 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 405 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 406 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 407 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */ 408 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */ 409 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ 410 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ 411 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ 412 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands 413 not multiple of 16 bytes */ 414 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */ 415 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ 416 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ 417 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ 418 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */ 419 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */ 420 ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */ 421 ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19), /* don't use queued TRIM */ 422 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */ 423 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */ 424 ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */ 425 ATA_HORKAGE_NO_DMA_LOG = (1 << 23), /* don't use DMA for log read */ 426 ATA_HORKAGE_NOTRIM = (1 << 24), /* don't use TRIM */ 427 ATA_HORKAGE_MAX_SEC_1024 = (1 << 25), /* Limit max sects to 1024 */ 428 ATA_HORKAGE_MAX_TRIM_128M = (1 << 26), /* Limit max trim size to 128M */ 429 430 /* DMA mask for user DMA control: User visible values; DO NOT 431 renumber */ 432 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 433 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 434 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 435 436 /* ATAPI command types */ 437 ATAPI_READ = 0, /* READs */ 438 ATAPI_WRITE = 1, /* WRITEs */ 439 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 440 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 441 ATAPI_MISC = 4, /* the rest */ 442 443 /* Timing constants */ 444 ATA_TIMING_SETUP = (1 << 0), 445 ATA_TIMING_ACT8B = (1 << 1), 446 ATA_TIMING_REC8B = (1 << 2), 447 ATA_TIMING_CYC8B = (1 << 3), 448 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 449 ATA_TIMING_CYC8B, 450 ATA_TIMING_ACTIVE = (1 << 4), 451 ATA_TIMING_RECOVER = (1 << 5), 452 ATA_TIMING_DMACK_HOLD = (1 << 6), 453 ATA_TIMING_CYCLE = (1 << 7), 454 ATA_TIMING_UDMA = (1 << 8), 455 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 456 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 457 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 458 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 459 ATA_TIMING_UDMA, 460 461 /* ACPI constants */ 462 ATA_ACPI_FILTER_SETXFER = 1 << 0, 463 ATA_ACPI_FILTER_LOCK = 1 << 1, 464 ATA_ACPI_FILTER_DIPM = 1 << 2, 465 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 466 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 467 468 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 469 ATA_ACPI_FILTER_LOCK | 470 ATA_ACPI_FILTER_DIPM, 471 }; 472 473 enum ata_xfer_mask { 474 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 475 << ATA_SHIFT_PIO, 476 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 477 << ATA_SHIFT_MWDMA, 478 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 479 << ATA_SHIFT_UDMA, 480 }; 481 482 enum hsm_task_states { 483 HSM_ST_IDLE, /* no command on going */ 484 HSM_ST_FIRST, /* (waiting the device to) 485 write CDB or first data block */ 486 HSM_ST, /* (waiting the device to) transfer data */ 487 HSM_ST_LAST, /* (waiting the device to) complete command */ 488 HSM_ST_ERR, /* error */ 489 }; 490 491 enum ata_completion_errors { 492 AC_ERR_OK = 0, /* no error */ 493 AC_ERR_DEV = (1 << 0), /* device reported error */ 494 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 495 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 496 AC_ERR_MEDIA = (1 << 3), /* media error */ 497 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 498 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 499 AC_ERR_SYSTEM = (1 << 6), /* system error */ 500 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 501 AC_ERR_OTHER = (1 << 8), /* unknown */ 502 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 503 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 504 }; 505 506 /* 507 * Link power management policy: If you alter this, you also need to 508 * alter libata-scsi.c (for the ascii descriptions) 509 */ 510 enum ata_lpm_policy { 511 ATA_LPM_UNKNOWN, 512 ATA_LPM_MAX_POWER, 513 ATA_LPM_MED_POWER, 514 ATA_LPM_MED_POWER_WITH_DIPM, /* Med power + DIPM as win IRST does */ 515 ATA_LPM_MIN_POWER_WITH_PARTIAL, /* Min Power + partial and slumber */ 516 ATA_LPM_MIN_POWER, /* Min power + no partial (slumber only) */ 517 }; 518 519 enum ata_lpm_hints { 520 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */ 521 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */ 522 ATA_LPM_WAKE_ONLY = (1 << 2), /* only wake up link */ 523 }; 524 525 /* forward declarations */ 526 struct scsi_device; 527 struct ata_port_operations; 528 struct ata_port; 529 struct ata_link; 530 struct ata_queued_cmd; 531 532 /* typedefs */ 533 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 534 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 535 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 536 unsigned long deadline); 537 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 538 539 extern struct device_attribute dev_attr_unload_heads; 540 #ifdef CONFIG_SATA_HOST 541 extern struct device_attribute dev_attr_link_power_management_policy; 542 extern struct device_attribute dev_attr_ncq_prio_supported; 543 extern struct device_attribute dev_attr_ncq_prio_enable; 544 extern struct device_attribute dev_attr_em_message_type; 545 extern struct device_attribute dev_attr_em_message; 546 extern struct device_attribute dev_attr_sw_activity; 547 #endif 548 549 enum sw_activity { 550 OFF, 551 BLINK_ON, 552 BLINK_OFF, 553 }; 554 555 struct ata_taskfile { 556 unsigned long flags; /* ATA_TFLAG_xxx */ 557 u8 protocol; /* ATA_PROT_xxx */ 558 559 u8 ctl; /* control reg */ 560 561 u8 hob_feature; /* additional data */ 562 u8 hob_nsect; /* to support LBA48 */ 563 u8 hob_lbal; 564 u8 hob_lbam; 565 u8 hob_lbah; 566 567 u8 feature; 568 u8 nsect; 569 u8 lbal; 570 u8 lbam; 571 u8 lbah; 572 573 u8 device; 574 575 u8 command; /* IO operation */ 576 577 u32 auxiliary; /* auxiliary field */ 578 /* from SATA 3.1 and */ 579 /* ATA-8 ACS-3 */ 580 }; 581 582 #ifdef CONFIG_ATA_SFF 583 struct ata_ioports { 584 void __iomem *cmd_addr; 585 void __iomem *data_addr; 586 void __iomem *error_addr; 587 void __iomem *feature_addr; 588 void __iomem *nsect_addr; 589 void __iomem *lbal_addr; 590 void __iomem *lbam_addr; 591 void __iomem *lbah_addr; 592 void __iomem *device_addr; 593 void __iomem *status_addr; 594 void __iomem *command_addr; 595 void __iomem *altstatus_addr; 596 void __iomem *ctl_addr; 597 #ifdef CONFIG_ATA_BMDMA 598 void __iomem *bmdma_addr; 599 #endif /* CONFIG_ATA_BMDMA */ 600 void __iomem *scr_addr; 601 }; 602 #endif /* CONFIG_ATA_SFF */ 603 604 struct ata_host { 605 spinlock_t lock; 606 struct device *dev; 607 void __iomem * const *iomap; 608 unsigned int n_ports; 609 unsigned int n_tags; /* nr of NCQ tags */ 610 void *private_data; 611 struct ata_port_operations *ops; 612 unsigned long flags; 613 struct kref kref; 614 615 struct mutex eh_mutex; 616 struct task_struct *eh_owner; 617 618 struct ata_port *simplex_claimed; /* channel owning the DMA */ 619 struct ata_port *ports[]; 620 }; 621 622 struct ata_queued_cmd { 623 struct ata_port *ap; 624 struct ata_device *dev; 625 626 struct scsi_cmnd *scsicmd; 627 void (*scsidone)(struct scsi_cmnd *); 628 629 struct ata_taskfile tf; 630 u8 cdb[ATAPI_CDB_LEN]; 631 632 unsigned long flags; /* ATA_QCFLAG_xxx */ 633 unsigned int tag; /* libata core tag */ 634 unsigned int hw_tag; /* driver tag */ 635 unsigned int n_elem; 636 unsigned int orig_n_elem; 637 638 int dma_dir; 639 640 unsigned int sect_size; 641 642 unsigned int nbytes; 643 unsigned int extrabytes; 644 unsigned int curbytes; 645 646 struct scatterlist sgent; 647 648 struct scatterlist *sg; 649 650 struct scatterlist *cursg; 651 unsigned int cursg_ofs; 652 653 unsigned int err_mask; 654 struct ata_taskfile result_tf; 655 ata_qc_cb_t complete_fn; 656 657 void *private_data; 658 void *lldd_task; 659 }; 660 661 struct ata_port_stats { 662 unsigned long unhandled_irq; 663 unsigned long idle_irq; 664 unsigned long rw_reqbuf; 665 }; 666 667 struct ata_ering_entry { 668 unsigned int eflags; 669 unsigned int err_mask; 670 u64 timestamp; 671 }; 672 673 struct ata_ering { 674 int cursor; 675 struct ata_ering_entry ring[ATA_ERING_SIZE]; 676 }; 677 678 struct ata_device { 679 struct ata_link *link; 680 unsigned int devno; /* 0 or 1 */ 681 unsigned int horkage; /* List of broken features */ 682 unsigned long flags; /* ATA_DFLAG_xxx */ 683 struct scsi_device *sdev; /* attached SCSI device */ 684 void *private_data; 685 #ifdef CONFIG_ATA_ACPI 686 union acpi_object *gtf_cache; 687 unsigned int gtf_filter; 688 #endif 689 #ifdef CONFIG_SATA_ZPODD 690 void *zpodd; 691 #endif 692 struct device tdev; 693 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 694 u64 n_sectors; /* size of device, if ATA */ 695 u64 n_native_sectors; /* native size, if ATA */ 696 unsigned int class; /* ATA_DEV_xxx */ 697 unsigned long unpark_deadline; 698 699 u8 pio_mode; 700 u8 dma_mode; 701 u8 xfer_mode; 702 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 703 704 unsigned int multi_count; /* sectors count for 705 READ/WRITE MULTIPLE */ 706 unsigned int max_sectors; /* per-device max sectors */ 707 unsigned int cdb_len; 708 709 /* per-dev xfer mask */ 710 unsigned long pio_mask; 711 unsigned long mwdma_mask; 712 unsigned long udma_mask; 713 714 /* for CHS addressing */ 715 u16 cylinders; /* Number of cylinders */ 716 u16 heads; /* Number of heads */ 717 u16 sectors; /* Number of sectors per track */ 718 719 union { 720 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 721 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 722 } ____cacheline_aligned; 723 724 /* DEVSLP Timing Variables from Identify Device Data Log */ 725 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE]; 726 727 /* NCQ send and receive log subcommand support */ 728 u8 ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE]; 729 u8 ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_SIZE]; 730 731 /* ZAC zone configuration */ 732 u32 zac_zoned_cap; 733 u32 zac_zones_optimal_open; 734 u32 zac_zones_optimal_nonseq; 735 u32 zac_zones_max_open; 736 737 /* error history */ 738 int spdn_cnt; 739 /* ering is CLEAR_END, read comment above CLEAR_END */ 740 struct ata_ering ering; 741 }; 742 743 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 744 * cleared to zero on ata_dev_init(). 745 */ 746 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 747 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 748 749 struct ata_eh_info { 750 struct ata_device *dev; /* offending device */ 751 u32 serror; /* SError from LLDD */ 752 unsigned int err_mask; /* port-wide err_mask */ 753 unsigned int action; /* ATA_EH_* action mask */ 754 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 755 unsigned int flags; /* ATA_EHI_* flags */ 756 757 unsigned int probe_mask; 758 759 char desc[ATA_EH_DESC_LEN]; 760 int desc_len; 761 }; 762 763 struct ata_eh_context { 764 struct ata_eh_info i; 765 int tries[ATA_MAX_DEVICES]; 766 int cmd_timeout_idx[ATA_MAX_DEVICES] 767 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 768 unsigned int classes[ATA_MAX_DEVICES]; 769 unsigned int did_probe_mask; 770 unsigned int unloaded_mask; 771 unsigned int saved_ncq_enabled; 772 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 773 /* timestamp for the last reset attempt or success */ 774 unsigned long last_reset; 775 }; 776 777 struct ata_acpi_drive 778 { 779 u32 pio; 780 u32 dma; 781 } __packed; 782 783 struct ata_acpi_gtm { 784 struct ata_acpi_drive drive[2]; 785 u32 flags; 786 } __packed; 787 788 struct ata_link { 789 struct ata_port *ap; 790 int pmp; /* port multiplier port # */ 791 792 struct device tdev; 793 unsigned int active_tag; /* active tag on this link */ 794 u32 sactive; /* active NCQ commands */ 795 796 unsigned int flags; /* ATA_LFLAG_xxx */ 797 798 u32 saved_scontrol; /* SControl on probe */ 799 unsigned int hw_sata_spd_limit; 800 unsigned int sata_spd_limit; 801 unsigned int sata_spd; /* current SATA PHY speed */ 802 enum ata_lpm_policy lpm_policy; 803 804 /* record runtime error info, protected by host_set lock */ 805 struct ata_eh_info eh_info; 806 /* EH context */ 807 struct ata_eh_context eh_context; 808 809 struct ata_device device[ATA_MAX_DEVICES]; 810 811 unsigned long last_lpm_change; /* when last LPM change happened */ 812 }; 813 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag) 814 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0]) 815 816 struct ata_port { 817 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 818 struct ata_port_operations *ops; 819 spinlock_t *lock; 820 /* Flags owned by the EH context. Only EH should touch these once the 821 port is active */ 822 unsigned long flags; /* ATA_FLAG_xxx */ 823 /* Flags that change dynamically, protected by ap->lock */ 824 unsigned int pflags; /* ATA_PFLAG_xxx */ 825 unsigned int print_id; /* user visible unique port ID */ 826 unsigned int local_port_no; /* host local port num */ 827 unsigned int port_no; /* 0 based port no. inside the host */ 828 829 #ifdef CONFIG_ATA_SFF 830 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 831 u8 ctl; /* cache of ATA control register */ 832 u8 last_ctl; /* Cache last written value */ 833 struct ata_link* sff_pio_task_link; /* link currently used */ 834 struct delayed_work sff_pio_task; 835 #ifdef CONFIG_ATA_BMDMA 836 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */ 837 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */ 838 #endif /* CONFIG_ATA_BMDMA */ 839 #endif /* CONFIG_ATA_SFF */ 840 841 unsigned int pio_mask; 842 unsigned int mwdma_mask; 843 unsigned int udma_mask; 844 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 845 846 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE + 1]; 847 unsigned long sas_tag_allocated; /* for sas tag allocation only */ 848 u64 qc_active; 849 int nr_active_links; /* #links with active qcs */ 850 unsigned int sas_last_tag; /* track next tag hw expects */ 851 852 struct ata_link link; /* host default link */ 853 struct ata_link *slave_link; /* see ata_slave_link_init() */ 854 855 int nr_pmp_links; /* nr of available PMP links */ 856 struct ata_link *pmp_link; /* array of PMP links */ 857 struct ata_link *excl_link; /* for PMP qc exclusion */ 858 859 struct ata_port_stats stats; 860 struct ata_host *host; 861 struct device *dev; 862 struct device tdev; 863 864 struct mutex scsi_scan_mutex; 865 struct delayed_work hotplug_task; 866 struct work_struct scsi_rescan_task; 867 868 unsigned int hsm_task_state; 869 870 u32 msg_enable; 871 struct list_head eh_done_q; 872 wait_queue_head_t eh_wait_q; 873 int eh_tries; 874 struct completion park_req_pending; 875 876 pm_message_t pm_mesg; 877 enum ata_lpm_policy target_lpm_policy; 878 879 struct timer_list fastdrain_timer; 880 unsigned long fastdrain_cnt; 881 882 async_cookie_t cookie; 883 884 int em_message_type; 885 void *private_data; 886 887 #ifdef CONFIG_ATA_ACPI 888 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 889 #endif 890 /* owned by EH */ 891 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 892 }; 893 894 /* The following initializer overrides a method to NULL whether one of 895 * its parent has the method defined or not. This is equivalent to 896 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 897 * expression and thus can't be used as an initializer. 898 */ 899 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 900 901 struct ata_port_operations { 902 /* 903 * Command execution 904 */ 905 int (*qc_defer)(struct ata_queued_cmd *qc); 906 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 907 enum ata_completion_errors (*qc_prep)(struct ata_queued_cmd *qc); 908 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 909 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 910 911 /* 912 * Configuration and exception handling 913 */ 914 int (*cable_detect)(struct ata_port *ap); 915 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 916 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 917 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 918 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 919 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 920 921 void (*dev_config)(struct ata_device *dev); 922 923 void (*freeze)(struct ata_port *ap); 924 void (*thaw)(struct ata_port *ap); 925 ata_prereset_fn_t prereset; 926 ata_reset_fn_t softreset; 927 ata_reset_fn_t hardreset; 928 ata_postreset_fn_t postreset; 929 ata_prereset_fn_t pmp_prereset; 930 ata_reset_fn_t pmp_softreset; 931 ata_reset_fn_t pmp_hardreset; 932 ata_postreset_fn_t pmp_postreset; 933 void (*error_handler)(struct ata_port *ap); 934 void (*lost_interrupt)(struct ata_port *ap); 935 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 936 void (*sched_eh)(struct ata_port *ap); 937 void (*end_eh)(struct ata_port *ap); 938 939 /* 940 * Optional features 941 */ 942 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 943 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 944 void (*pmp_attach)(struct ata_port *ap); 945 void (*pmp_detach)(struct ata_port *ap); 946 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy, 947 unsigned hints); 948 949 /* 950 * Start, stop, suspend and resume 951 */ 952 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 953 int (*port_resume)(struct ata_port *ap); 954 int (*port_start)(struct ata_port *ap); 955 void (*port_stop)(struct ata_port *ap); 956 void (*host_stop)(struct ata_host *host); 957 958 #ifdef CONFIG_ATA_SFF 959 /* 960 * SFF / taskfile oriented ops 961 */ 962 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 963 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl); 964 u8 (*sff_check_status)(struct ata_port *ap); 965 u8 (*sff_check_altstatus)(struct ata_port *ap); 966 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 967 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 968 void (*sff_exec_command)(struct ata_port *ap, 969 const struct ata_taskfile *tf); 970 unsigned int (*sff_data_xfer)(struct ata_queued_cmd *qc, 971 unsigned char *buf, unsigned int buflen, int rw); 972 void (*sff_irq_on)(struct ata_port *); 973 bool (*sff_irq_check)(struct ata_port *); 974 void (*sff_irq_clear)(struct ata_port *); 975 void (*sff_drain_fifo)(struct ata_queued_cmd *qc); 976 977 #ifdef CONFIG_ATA_BMDMA 978 void (*bmdma_setup)(struct ata_queued_cmd *qc); 979 void (*bmdma_start)(struct ata_queued_cmd *qc); 980 void (*bmdma_stop)(struct ata_queued_cmd *qc); 981 u8 (*bmdma_status)(struct ata_port *ap); 982 #endif /* CONFIG_ATA_BMDMA */ 983 #endif /* CONFIG_ATA_SFF */ 984 985 ssize_t (*em_show)(struct ata_port *ap, char *buf); 986 ssize_t (*em_store)(struct ata_port *ap, const char *message, 987 size_t size); 988 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 989 ssize_t (*sw_activity_store)(struct ata_device *dev, 990 enum sw_activity val); 991 ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state, 992 ssize_t size); 993 994 /* 995 * Obsolete 996 */ 997 void (*phy_reset)(struct ata_port *ap); 998 void (*eng_timeout)(struct ata_port *ap); 999 1000 /* 1001 * ->inherits must be the last field and all the preceding 1002 * fields must be pointers. 1003 */ 1004 const struct ata_port_operations *inherits; 1005 }; 1006 1007 struct ata_port_info { 1008 unsigned long flags; 1009 unsigned long link_flags; 1010 unsigned long pio_mask; 1011 unsigned long mwdma_mask; 1012 unsigned long udma_mask; 1013 struct ata_port_operations *port_ops; 1014 void *private_data; 1015 }; 1016 1017 struct ata_timing { 1018 unsigned short mode; /* ATA mode */ 1019 unsigned short setup; /* t1 */ 1020 unsigned short act8b; /* t2 for 8-bit I/O */ 1021 unsigned short rec8b; /* t2i for 8-bit I/O */ 1022 unsigned short cyc8b; /* t0 for 8-bit I/O */ 1023 unsigned short active; /* t2 or tD */ 1024 unsigned short recover; /* t2i or tK */ 1025 unsigned short dmack_hold; /* tj */ 1026 unsigned short cycle; /* t0 */ 1027 unsigned short udma; /* t2CYCTYP/2 */ 1028 }; 1029 1030 /* 1031 * Core layer - drivers/ata/libata-core.c 1032 */ 1033 extern struct ata_port_operations ata_dummy_port_ops; 1034 extern const struct ata_port_info ata_dummy_port_info; 1035 1036 static inline bool ata_is_atapi(u8 prot) 1037 { 1038 return prot & ATA_PROT_FLAG_ATAPI; 1039 } 1040 1041 static inline bool ata_is_pio(u8 prot) 1042 { 1043 return prot & ATA_PROT_FLAG_PIO; 1044 } 1045 1046 static inline bool ata_is_dma(u8 prot) 1047 { 1048 return prot & ATA_PROT_FLAG_DMA; 1049 } 1050 1051 static inline bool ata_is_ncq(u8 prot) 1052 { 1053 return prot & ATA_PROT_FLAG_NCQ; 1054 } 1055 1056 static inline bool ata_is_data(u8 prot) 1057 { 1058 return prot & (ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA); 1059 } 1060 1061 static inline int is_multi_taskfile(struct ata_taskfile *tf) 1062 { 1063 return (tf->command == ATA_CMD_READ_MULTI) || 1064 (tf->command == ATA_CMD_WRITE_MULTI) || 1065 (tf->command == ATA_CMD_READ_MULTI_EXT) || 1066 (tf->command == ATA_CMD_WRITE_MULTI_EXT) || 1067 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT); 1068 } 1069 1070 static inline int ata_port_is_dummy(struct ata_port *ap) 1071 { 1072 return ap->ops == &ata_dummy_port_ops; 1073 } 1074 1075 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 1076 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 1077 int (*check_ready)(struct ata_link *link)); 1078 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 1079 unsigned long deadline); 1080 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 1081 1082 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 1083 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 1084 const struct ata_port_info * const * ppi, int n_ports); 1085 extern void ata_host_get(struct ata_host *host); 1086 extern void ata_host_put(struct ata_host *host); 1087 extern int ata_host_start(struct ata_host *host); 1088 extern int ata_host_register(struct ata_host *host, 1089 struct scsi_host_template *sht); 1090 extern int ata_host_activate(struct ata_host *host, int irq, 1091 irq_handler_t irq_handler, unsigned long irq_flags, 1092 struct scsi_host_template *sht); 1093 extern void ata_host_detach(struct ata_host *host); 1094 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *); 1095 extern int ata_scsi_detect(struct scsi_host_template *sht); 1096 extern int ata_scsi_ioctl(struct scsi_device *dev, unsigned int cmd, 1097 void __user *arg); 1098 #ifdef CONFIG_COMPAT 1099 #define ATA_SCSI_COMPAT_IOCTL .compat_ioctl = ata_scsi_ioctl, 1100 #else 1101 #define ATA_SCSI_COMPAT_IOCTL /* empty */ 1102 #endif 1103 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd); 1104 #if IS_REACHABLE(CONFIG_ATA) 1105 bool ata_scsi_dma_need_drain(struct request *rq); 1106 #else 1107 #define ata_scsi_dma_need_drain NULL 1108 #endif 1109 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 1110 unsigned int cmd, void __user *arg); 1111 extern bool ata_link_online(struct ata_link *link); 1112 extern bool ata_link_offline(struct ata_link *link); 1113 #ifdef CONFIG_PM 1114 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 1115 extern void ata_host_resume(struct ata_host *host); 1116 extern void ata_sas_port_suspend(struct ata_port *ap); 1117 extern void ata_sas_port_resume(struct ata_port *ap); 1118 #else 1119 static inline void ata_sas_port_suspend(struct ata_port *ap) 1120 { 1121 } 1122 static inline void ata_sas_port_resume(struct ata_port *ap) 1123 { 1124 } 1125 #endif 1126 extern int ata_ratelimit(void); 1127 extern void ata_msleep(struct ata_port *ap, unsigned int msecs); 1128 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, 1129 u32 val, unsigned long interval, unsigned long timeout); 1130 extern int atapi_cmd_type(u8 opcode); 1131 extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 1132 unsigned long mwdma_mask, unsigned long udma_mask); 1133 extern void ata_unpack_xfermask(unsigned long xfer_mask, 1134 unsigned long *pio_mask, unsigned long *mwdma_mask, 1135 unsigned long *udma_mask); 1136 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 1137 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 1138 extern int ata_xfer_mode2shift(unsigned long xfer_mode); 1139 extern const char *ata_mode_string(unsigned long xfer_mask); 1140 extern unsigned long ata_id_xfermask(const u16 *id); 1141 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1142 extern enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc); 1143 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1144 unsigned int n_elem); 1145 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1146 extern void ata_dev_disable(struct ata_device *adev); 1147 extern void ata_id_string(const u16 *id, unsigned char *s, 1148 unsigned int ofs, unsigned int len); 1149 extern void ata_id_c_string(const u16 *id, unsigned char *s, 1150 unsigned int ofs, unsigned int len); 1151 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1152 struct ata_taskfile *tf, u16 *id); 1153 extern void ata_qc_complete(struct ata_queued_cmd *qc); 1154 extern u64 ata_qc_get_active(struct ata_port *ap); 1155 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd); 1156 extern int ata_std_bios_param(struct scsi_device *sdev, 1157 struct block_device *bdev, 1158 sector_t capacity, int geom[]); 1159 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev); 1160 extern int ata_scsi_slave_config(struct scsi_device *sdev); 1161 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1162 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1163 int queue_depth); 1164 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1165 int queue_depth); 1166 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1167 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1168 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap); 1169 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q); 1170 1171 /* 1172 * SATA specific code - drivers/ata/libata-sata.c 1173 */ 1174 #ifdef CONFIG_SATA_HOST 1175 extern const unsigned long sata_deb_timing_normal[]; 1176 extern const unsigned long sata_deb_timing_hotplug[]; 1177 extern const unsigned long sata_deb_timing_long[]; 1178 1179 static inline const unsigned long * 1180 sata_ehc_deb_timing(struct ata_eh_context *ehc) 1181 { 1182 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 1183 return sata_deb_timing_hotplug; 1184 else 1185 return sata_deb_timing_normal; 1186 } 1187 1188 extern int sata_scr_valid(struct ata_link *link); 1189 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 1190 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 1191 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 1192 extern int sata_set_spd(struct ata_link *link); 1193 extern int sata_link_hardreset(struct ata_link *link, 1194 const unsigned long *timing, unsigned long deadline, 1195 bool *online, int (*check_ready)(struct ata_link *)); 1196 extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 1197 unsigned long deadline); 1198 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1199 #else 1200 static inline const unsigned long * 1201 sata_ehc_deb_timing(struct ata_eh_context *ehc) 1202 { 1203 return NULL; 1204 } 1205 static inline int sata_scr_valid(struct ata_link *link) { return 0; } 1206 static inline int sata_scr_read(struct ata_link *link, int reg, u32 *val) 1207 { 1208 return -EOPNOTSUPP; 1209 } 1210 static inline int sata_scr_write(struct ata_link *link, int reg, u32 val) 1211 { 1212 return -EOPNOTSUPP; 1213 } 1214 static inline int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) 1215 { 1216 return -EOPNOTSUPP; 1217 } 1218 static inline int sata_set_spd(struct ata_link *link) { return -EOPNOTSUPP; } 1219 static inline int sata_link_hardreset(struct ata_link *link, 1220 const unsigned long *timing, 1221 unsigned long deadline, 1222 bool *online, 1223 int (*check_ready)(struct ata_link *)) 1224 { 1225 if (online) 1226 *online = false; 1227 return -EOPNOTSUPP; 1228 } 1229 static inline int sata_link_resume(struct ata_link *link, 1230 const unsigned long *params, 1231 unsigned long deadline) 1232 { 1233 return -EOPNOTSUPP; 1234 } 1235 static inline void ata_eh_analyze_ncq_error(struct ata_link *link) { } 1236 #endif 1237 extern int sata_link_debounce(struct ata_link *link, 1238 const unsigned long *params, unsigned long deadline); 1239 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, 1240 bool spm_wakeup); 1241 extern int ata_slave_link_init(struct ata_port *ap); 1242 extern void ata_sas_port_destroy(struct ata_port *); 1243 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 1244 struct ata_port_info *, struct Scsi_Host *); 1245 extern void ata_sas_async_probe(struct ata_port *ap); 1246 extern int ata_sas_sync_probe(struct ata_port *ap); 1247 extern int ata_sas_port_init(struct ata_port *); 1248 extern int ata_sas_port_start(struct ata_port *ap); 1249 extern int ata_sas_tport_add(struct device *parent, struct ata_port *ap); 1250 extern void ata_sas_tport_delete(struct ata_port *ap); 1251 extern void ata_sas_port_stop(struct ata_port *ap); 1252 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 1253 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap); 1254 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 1255 u8 pmp, int is_cmd, u8 *fis); 1256 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 1257 extern int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active); 1258 extern bool sata_lpm_ignore_phy_events(struct ata_link *link); 1259 extern int sata_async_notification(struct ata_port *ap); 1260 1261 extern int ata_cable_40wire(struct ata_port *ap); 1262 extern int ata_cable_80wire(struct ata_port *ap); 1263 extern int ata_cable_sata(struct ata_port *ap); 1264 extern int ata_cable_ignore(struct ata_port *ap); 1265 extern int ata_cable_unknown(struct ata_port *ap); 1266 1267 /* Timing helpers */ 1268 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1269 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1270 1271 /* PCI */ 1272 #ifdef CONFIG_PCI 1273 struct pci_dev; 1274 1275 struct pci_bits { 1276 unsigned int reg; /* PCI config register to read */ 1277 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1278 unsigned long mask; 1279 unsigned long val; 1280 }; 1281 1282 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1283 extern void ata_pci_shutdown_one(struct pci_dev *pdev); 1284 extern void ata_pci_remove_one(struct pci_dev *pdev); 1285 1286 #ifdef CONFIG_PM 1287 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1288 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1289 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1290 extern int ata_pci_device_resume(struct pci_dev *pdev); 1291 #endif /* CONFIG_PM */ 1292 #endif /* CONFIG_PCI */ 1293 1294 struct platform_device; 1295 1296 extern int ata_platform_remove_one(struct platform_device *pdev); 1297 1298 /* 1299 * ACPI - drivers/ata/libata-acpi.c 1300 */ 1301 #ifdef CONFIG_ATA_ACPI 1302 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1303 { 1304 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1305 return &ap->__acpi_init_gtm; 1306 return NULL; 1307 } 1308 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1309 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1310 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1311 const struct ata_acpi_gtm *gtm); 1312 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1313 #else 1314 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1315 { 1316 return NULL; 1317 } 1318 1319 static inline int ata_acpi_stm(const struct ata_port *ap, 1320 struct ata_acpi_gtm *stm) 1321 { 1322 return -ENOSYS; 1323 } 1324 1325 static inline int ata_acpi_gtm(const struct ata_port *ap, 1326 struct ata_acpi_gtm *stm) 1327 { 1328 return -ENOSYS; 1329 } 1330 1331 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1332 const struct ata_acpi_gtm *gtm) 1333 { 1334 return 0; 1335 } 1336 1337 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1338 const struct ata_acpi_gtm *gtm) 1339 { 1340 return 0; 1341 } 1342 #endif 1343 1344 /* 1345 * EH - drivers/ata/libata-eh.c 1346 */ 1347 extern void ata_port_schedule_eh(struct ata_port *ap); 1348 extern void ata_port_wait_eh(struct ata_port *ap); 1349 extern int ata_link_abort(struct ata_link *link); 1350 extern int ata_port_abort(struct ata_port *ap); 1351 extern int ata_port_freeze(struct ata_port *ap); 1352 1353 extern void ata_eh_freeze_port(struct ata_port *ap); 1354 extern void ata_eh_thaw_port(struct ata_port *ap); 1355 1356 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1357 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1358 1359 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1360 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1361 ata_postreset_fn_t postreset); 1362 extern void ata_std_error_handler(struct ata_port *ap); 1363 extern void ata_std_sched_eh(struct ata_port *ap); 1364 extern void ata_std_end_eh(struct ata_port *ap); 1365 extern int ata_link_nr_enabled(struct ata_link *link); 1366 1367 /* 1368 * Base operations to inherit from and initializers for sht 1369 * 1370 * Operations 1371 * 1372 * base : Common to all libata drivers. 1373 * sata : SATA controllers w/ native interface. 1374 * pmp : SATA controllers w/ PMP support. 1375 * sff : SFF ATA controllers w/o BMDMA support. 1376 * bmdma : SFF ATA controllers w/ BMDMA support. 1377 * 1378 * sht initializers 1379 * 1380 * BASE : Common to all libata drivers. The user must set 1381 * sg_tablesize and dma_boundary. 1382 * PIO : SFF ATA controllers w/ only PIO support. 1383 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1384 * dma_boundary are set to BMDMA limits. 1385 * NCQ : SATA controllers supporting NCQ. The user must set 1386 * sg_tablesize, dma_boundary and can_queue. 1387 */ 1388 extern const struct ata_port_operations ata_base_port_ops; 1389 extern const struct ata_port_operations sata_port_ops; 1390 extern struct device_attribute *ata_common_sdev_attrs[]; 1391 1392 /* 1393 * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated 1394 * by the edge drivers. Because the 'module' field of sht must be the 1395 * edge driver's module reference, otherwise the driver can be unloaded 1396 * even if the scsi_device is being accessed. 1397 */ 1398 #define __ATA_BASE_SHT(drv_name) \ 1399 .module = THIS_MODULE, \ 1400 .name = drv_name, \ 1401 .ioctl = ata_scsi_ioctl, \ 1402 ATA_SCSI_COMPAT_IOCTL \ 1403 .queuecommand = ata_scsi_queuecmd, \ 1404 .dma_need_drain = ata_scsi_dma_need_drain, \ 1405 .this_id = ATA_SHT_THIS_ID, \ 1406 .emulated = ATA_SHT_EMULATED, \ 1407 .proc_name = drv_name, \ 1408 .slave_destroy = ata_scsi_slave_destroy, \ 1409 .bios_param = ata_std_bios_param, \ 1410 .unlock_native_capacity = ata_scsi_unlock_native_capacity 1411 1412 #define ATA_SUBBASE_SHT(drv_name) \ 1413 __ATA_BASE_SHT(drv_name), \ 1414 .can_queue = ATA_DEF_QUEUE, \ 1415 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \ 1416 .slave_configure = ata_scsi_slave_config 1417 1418 #define ATA_BASE_SHT(drv_name) \ 1419 ATA_SUBBASE_SHT(drv_name), \ 1420 .sdev_attrs = ata_common_sdev_attrs 1421 1422 #ifdef CONFIG_SATA_HOST 1423 extern struct device_attribute *ata_ncq_sdev_attrs[]; 1424 1425 #define ATA_NCQ_SHT(drv_name) \ 1426 ATA_SUBBASE_SHT(drv_name), \ 1427 .sdev_attrs = ata_ncq_sdev_attrs, \ 1428 .change_queue_depth = ata_scsi_change_queue_depth 1429 #endif 1430 1431 /* 1432 * PMP helpers 1433 */ 1434 #ifdef CONFIG_SATA_PMP 1435 static inline bool sata_pmp_supported(struct ata_port *ap) 1436 { 1437 return ap->flags & ATA_FLAG_PMP; 1438 } 1439 1440 static inline bool sata_pmp_attached(struct ata_port *ap) 1441 { 1442 return ap->nr_pmp_links != 0; 1443 } 1444 1445 static inline bool ata_is_host_link(const struct ata_link *link) 1446 { 1447 return link == &link->ap->link || link == link->ap->slave_link; 1448 } 1449 #else /* CONFIG_SATA_PMP */ 1450 static inline bool sata_pmp_supported(struct ata_port *ap) 1451 { 1452 return false; 1453 } 1454 1455 static inline bool sata_pmp_attached(struct ata_port *ap) 1456 { 1457 return false; 1458 } 1459 1460 static inline bool ata_is_host_link(const struct ata_link *link) 1461 { 1462 return true; 1463 } 1464 #endif /* CONFIG_SATA_PMP */ 1465 1466 static inline int sata_srst_pmp(struct ata_link *link) 1467 { 1468 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1469 return SATA_PMP_CTRL_PORT; 1470 return link->pmp; 1471 } 1472 1473 /* 1474 * printk helpers 1475 */ 1476 __printf(3, 4) 1477 void ata_port_printk(const struct ata_port *ap, const char *level, 1478 const char *fmt, ...); 1479 __printf(3, 4) 1480 void ata_link_printk(const struct ata_link *link, const char *level, 1481 const char *fmt, ...); 1482 __printf(3, 4) 1483 void ata_dev_printk(const struct ata_device *dev, const char *level, 1484 const char *fmt, ...); 1485 1486 #define ata_port_err(ap, fmt, ...) \ 1487 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__) 1488 #define ata_port_warn(ap, fmt, ...) \ 1489 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__) 1490 #define ata_port_notice(ap, fmt, ...) \ 1491 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__) 1492 #define ata_port_info(ap, fmt, ...) \ 1493 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__) 1494 #define ata_port_dbg(ap, fmt, ...) \ 1495 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__) 1496 1497 #define ata_link_err(link, fmt, ...) \ 1498 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__) 1499 #define ata_link_warn(link, fmt, ...) \ 1500 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__) 1501 #define ata_link_notice(link, fmt, ...) \ 1502 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__) 1503 #define ata_link_info(link, fmt, ...) \ 1504 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__) 1505 #define ata_link_dbg(link, fmt, ...) \ 1506 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__) 1507 1508 #define ata_dev_err(dev, fmt, ...) \ 1509 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__) 1510 #define ata_dev_warn(dev, fmt, ...) \ 1511 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__) 1512 #define ata_dev_notice(dev, fmt, ...) \ 1513 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__) 1514 #define ata_dev_info(dev, fmt, ...) \ 1515 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__) 1516 #define ata_dev_dbg(dev, fmt, ...) \ 1517 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__) 1518 1519 void ata_print_version(const struct device *dev, const char *version); 1520 1521 /* 1522 * ata_eh_info helpers 1523 */ 1524 extern __printf(2, 3) 1525 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1526 extern __printf(2, 3) 1527 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1528 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1529 1530 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1531 { 1532 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1533 ehi->flags |= ATA_EHI_HOTPLUGGED; 1534 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1535 ehi->err_mask |= AC_ERR_ATA_BUS; 1536 } 1537 1538 /* 1539 * port description helpers 1540 */ 1541 extern __printf(2, 3) 1542 void ata_port_desc(struct ata_port *ap, const char *fmt, ...); 1543 #ifdef CONFIG_PCI 1544 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1545 const char *name); 1546 #endif 1547 1548 static inline bool ata_tag_internal(unsigned int tag) 1549 { 1550 return tag == ATA_TAG_INTERNAL; 1551 } 1552 1553 static inline bool ata_tag_valid(unsigned int tag) 1554 { 1555 return tag < ATA_MAX_QUEUE || ata_tag_internal(tag); 1556 } 1557 1558 #define __ata_qc_for_each(ap, qc, tag, max_tag, fn) \ 1559 for ((tag) = 0; (tag) < (max_tag) && \ 1560 ({ qc = fn((ap), (tag)); 1; }); (tag)++) \ 1561 1562 /* 1563 * Internal use only, iterate commands ignoring error handling and 1564 * status of 'qc'. 1565 */ 1566 #define ata_qc_for_each_raw(ap, qc, tag) \ 1567 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, __ata_qc_from_tag) 1568 1569 /* 1570 * Iterate all potential commands that can be queued 1571 */ 1572 #define ata_qc_for_each(ap, qc, tag) \ 1573 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, ata_qc_from_tag) 1574 1575 /* 1576 * Like ata_qc_for_each, but with the internal tag included 1577 */ 1578 #define ata_qc_for_each_with_internal(ap, qc, tag) \ 1579 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE + 1, ata_qc_from_tag) 1580 1581 /* 1582 * device helpers 1583 */ 1584 static inline unsigned int ata_class_enabled(unsigned int class) 1585 { 1586 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1587 class == ATA_DEV_PMP || class == ATA_DEV_SEMB || 1588 class == ATA_DEV_ZAC; 1589 } 1590 1591 static inline unsigned int ata_class_disabled(unsigned int class) 1592 { 1593 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1594 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP || 1595 class == ATA_DEV_ZAC_UNSUP; 1596 } 1597 1598 static inline unsigned int ata_class_absent(unsigned int class) 1599 { 1600 return !ata_class_enabled(class) && !ata_class_disabled(class); 1601 } 1602 1603 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1604 { 1605 return ata_class_enabled(dev->class); 1606 } 1607 1608 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1609 { 1610 return ata_class_disabled(dev->class); 1611 } 1612 1613 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1614 { 1615 return ata_class_absent(dev->class); 1616 } 1617 1618 /* 1619 * link helpers 1620 */ 1621 static inline int ata_link_max_devices(const struct ata_link *link) 1622 { 1623 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1624 return 2; 1625 return 1; 1626 } 1627 1628 static inline int ata_link_active(struct ata_link *link) 1629 { 1630 return ata_tag_valid(link->active_tag) || link->sactive; 1631 } 1632 1633 /* 1634 * Iterators 1635 * 1636 * ATA_LITER_* constants are used to select link iteration mode and 1637 * ATA_DITER_* device iteration mode. 1638 * 1639 * For a custom iteration directly using ata_{link|dev}_next(), if 1640 * @link or @dev, respectively, is NULL, the first element is 1641 * returned. @dev and @link can be any valid device or link and the 1642 * next element according to the iteration mode will be returned. 1643 * After the last element, NULL is returned. 1644 */ 1645 enum ata_link_iter_mode { 1646 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1647 * host link. no slave link */ 1648 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1649 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1650 * slave link still comes after host link */ 1651 }; 1652 1653 enum ata_dev_iter_mode { 1654 ATA_DITER_ENABLED, 1655 ATA_DITER_ENABLED_REVERSE, 1656 ATA_DITER_ALL, 1657 ATA_DITER_ALL_REVERSE, 1658 }; 1659 1660 extern struct ata_link *ata_link_next(struct ata_link *link, 1661 struct ata_port *ap, 1662 enum ata_link_iter_mode mode); 1663 1664 extern struct ata_device *ata_dev_next(struct ata_device *dev, 1665 struct ata_link *link, 1666 enum ata_dev_iter_mode mode); 1667 1668 /* 1669 * Shortcut notation for iterations 1670 * 1671 * ata_for_each_link() iterates over each link of @ap according to 1672 * @mode. @link points to the current link in the loop. @link is 1673 * NULL after loop termination. ata_for_each_dev() works the same way 1674 * except that it iterates over each device of @link. 1675 * 1676 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1677 * specified when using the following shorthand notations. Only the 1678 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1679 * specified. This not only increases brevity but also makes it 1680 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1681 */ 1682 #define ata_for_each_link(link, ap, mode) \ 1683 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1684 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1685 1686 #define ata_for_each_dev(dev, link, mode) \ 1687 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1688 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1689 1690 /** 1691 * ata_ncq_enabled - Test whether NCQ is enabled 1692 * @dev: ATA device to test for 1693 * 1694 * LOCKING: 1695 * spin_lock_irqsave(host lock) 1696 * 1697 * RETURNS: 1698 * 1 if NCQ is enabled for @dev, 0 otherwise. 1699 */ 1700 static inline int ata_ncq_enabled(struct ata_device *dev) 1701 { 1702 if (!IS_ENABLED(CONFIG_SATA_HOST)) 1703 return 0; 1704 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1705 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1706 } 1707 1708 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev) 1709 { 1710 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) && 1711 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] & 1712 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM); 1713 } 1714 1715 static inline bool ata_fpdma_read_log_supported(struct ata_device *dev) 1716 { 1717 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) && 1718 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET] & 1719 ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED); 1720 } 1721 1722 static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev) 1723 { 1724 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) && 1725 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] & 1726 ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED); 1727 } 1728 1729 static inline bool ata_fpdma_zac_mgmt_out_supported(struct ata_device *dev) 1730 { 1731 return (dev->ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OFFSET] & 1732 ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OUT); 1733 } 1734 1735 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1736 { 1737 qc->tf.ctl |= ATA_NIEN; 1738 } 1739 1740 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1741 unsigned int tag) 1742 { 1743 if (ata_tag_valid(tag)) 1744 return &ap->qcmd[tag]; 1745 return NULL; 1746 } 1747 1748 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1749 unsigned int tag) 1750 { 1751 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1752 1753 if (unlikely(!qc) || !ap->ops->error_handler) 1754 return qc; 1755 1756 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1757 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1758 return qc; 1759 1760 return NULL; 1761 } 1762 1763 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1764 { 1765 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1766 } 1767 1768 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1769 { 1770 memset(tf, 0, sizeof(*tf)); 1771 1772 #ifdef CONFIG_ATA_SFF 1773 tf->ctl = dev->link->ap->ctl; 1774 #else 1775 tf->ctl = ATA_DEVCTL_OBS; 1776 #endif 1777 if (dev->devno == 0) 1778 tf->device = ATA_DEVICE_OBS; 1779 else 1780 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1781 } 1782 1783 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1784 { 1785 qc->dma_dir = DMA_NONE; 1786 qc->sg = NULL; 1787 qc->flags = 0; 1788 qc->cursg = NULL; 1789 qc->cursg_ofs = 0; 1790 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1791 qc->n_elem = 0; 1792 qc->err_mask = 0; 1793 qc->sect_size = ATA_SECT_SIZE; 1794 1795 ata_tf_init(qc->dev, &qc->tf); 1796 1797 /* init result_tf such that it indicates normal completion */ 1798 qc->result_tf.command = ATA_DRDY; 1799 qc->result_tf.feature = 0; 1800 } 1801 1802 static inline int ata_try_flush_cache(const struct ata_device *dev) 1803 { 1804 return ata_id_wcache_enabled(dev->id) || 1805 ata_id_has_flush(dev->id) || 1806 ata_id_has_flush_ext(dev->id); 1807 } 1808 1809 static inline unsigned int ac_err_mask(u8 status) 1810 { 1811 if (status & (ATA_BUSY | ATA_DRQ)) 1812 return AC_ERR_HSM; 1813 if (status & (ATA_ERR | ATA_DF)) 1814 return AC_ERR_DEV; 1815 return 0; 1816 } 1817 1818 static inline unsigned int __ac_err_mask(u8 status) 1819 { 1820 unsigned int mask = ac_err_mask(status); 1821 if (mask == 0) 1822 return AC_ERR_OTHER; 1823 return mask; 1824 } 1825 1826 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1827 { 1828 return *(struct ata_port **)&host->hostdata[0]; 1829 } 1830 1831 static inline int ata_check_ready(u8 status) 1832 { 1833 if (!(status & ATA_BUSY)) 1834 return 1; 1835 1836 /* 0xff indicates either no device or device not ready */ 1837 if (status == 0xff) 1838 return -ENODEV; 1839 1840 return 0; 1841 } 1842 1843 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1844 unsigned long timeout_msecs) 1845 { 1846 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1847 } 1848 1849 /* Don't open code these in drivers as there are traps. Firstly the range may 1850 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1851 > UDMA_0. Dyma ddreigiau */ 1852 1853 static inline int ata_using_mwdma(struct ata_device *adev) 1854 { 1855 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1856 return 1; 1857 return 0; 1858 } 1859 1860 static inline int ata_using_udma(struct ata_device *adev) 1861 { 1862 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1863 return 1; 1864 return 0; 1865 } 1866 1867 static inline int ata_dma_enabled(struct ata_device *adev) 1868 { 1869 return (adev->dma_mode == 0xFF ? 0 : 1); 1870 } 1871 1872 /************************************************************************** 1873 * PATA timings - drivers/ata/libata-pata-timings.c 1874 */ 1875 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1876 extern int ata_timing_compute(struct ata_device *, unsigned short, 1877 struct ata_timing *, int, int); 1878 extern void ata_timing_merge(const struct ata_timing *, 1879 const struct ata_timing *, struct ata_timing *, 1880 unsigned int); 1881 1882 /************************************************************************** 1883 * PMP - drivers/ata/libata-pmp.c 1884 */ 1885 #ifdef CONFIG_SATA_PMP 1886 1887 extern const struct ata_port_operations sata_pmp_port_ops; 1888 1889 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1890 extern void sata_pmp_error_handler(struct ata_port *ap); 1891 1892 #else /* CONFIG_SATA_PMP */ 1893 1894 #define sata_pmp_port_ops sata_port_ops 1895 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1896 #define sata_pmp_error_handler ata_std_error_handler 1897 1898 #endif /* CONFIG_SATA_PMP */ 1899 1900 1901 /************************************************************************** 1902 * SFF - drivers/ata/libata-sff.c 1903 */ 1904 #ifdef CONFIG_ATA_SFF 1905 1906 extern const struct ata_port_operations ata_sff_port_ops; 1907 extern const struct ata_port_operations ata_bmdma32_port_ops; 1908 1909 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1910 #define ATA_PIO_SHT(drv_name) \ 1911 ATA_BASE_SHT(drv_name), \ 1912 .sg_tablesize = LIBATA_MAX_PRD, \ 1913 .dma_boundary = ATA_DMA_BOUNDARY 1914 1915 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1916 extern u8 ata_sff_check_status(struct ata_port *ap); 1917 extern void ata_sff_pause(struct ata_port *ap); 1918 extern void ata_sff_dma_pause(struct ata_port *ap); 1919 extern int ata_sff_busy_sleep(struct ata_port *ap, 1920 unsigned long timeout_pat, unsigned long timeout); 1921 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1922 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1923 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1924 extern void ata_sff_exec_command(struct ata_port *ap, 1925 const struct ata_taskfile *tf); 1926 extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc, 1927 unsigned char *buf, unsigned int buflen, int rw); 1928 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc, 1929 unsigned char *buf, unsigned int buflen, int rw); 1930 extern void ata_sff_irq_on(struct ata_port *ap); 1931 extern void ata_sff_irq_clear(struct ata_port *ap); 1932 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1933 u8 status, int in_wq); 1934 extern void ata_sff_queue_work(struct work_struct *work); 1935 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork, 1936 unsigned long delay); 1937 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay); 1938 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1939 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1940 extern unsigned int ata_sff_port_intr(struct ata_port *ap, 1941 struct ata_queued_cmd *qc); 1942 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1943 extern void ata_sff_lost_interrupt(struct ata_port *ap); 1944 extern void ata_sff_freeze(struct ata_port *ap); 1945 extern void ata_sff_thaw(struct ata_port *ap); 1946 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1947 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1948 u8 *r_err); 1949 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1950 unsigned long deadline); 1951 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1952 unsigned long deadline); 1953 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1954 unsigned long deadline); 1955 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1956 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1957 extern void ata_sff_error_handler(struct ata_port *ap); 1958 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1959 #ifdef CONFIG_PCI 1960 extern int ata_pci_sff_init_host(struct ata_host *host); 1961 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1962 const struct ata_port_info * const * ppi, 1963 struct ata_host **r_host); 1964 extern int ata_pci_sff_activate_host(struct ata_host *host, 1965 irq_handler_t irq_handler, 1966 struct scsi_host_template *sht); 1967 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1968 const struct ata_port_info * const * ppi, 1969 struct scsi_host_template *sht, void *host_priv, int hflags); 1970 #endif /* CONFIG_PCI */ 1971 1972 #ifdef CONFIG_ATA_BMDMA 1973 1974 extern const struct ata_port_operations ata_bmdma_port_ops; 1975 1976 #define ATA_BMDMA_SHT(drv_name) \ 1977 ATA_BASE_SHT(drv_name), \ 1978 .sg_tablesize = LIBATA_MAX_PRD, \ 1979 .dma_boundary = ATA_DMA_BOUNDARY 1980 1981 extern enum ata_completion_errors ata_bmdma_qc_prep(struct ata_queued_cmd *qc); 1982 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc); 1983 extern enum ata_completion_errors ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc); 1984 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap, 1985 struct ata_queued_cmd *qc); 1986 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance); 1987 extern void ata_bmdma_error_handler(struct ata_port *ap); 1988 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 1989 extern void ata_bmdma_irq_clear(struct ata_port *ap); 1990 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1991 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1992 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1993 extern u8 ata_bmdma_status(struct ata_port *ap); 1994 extern int ata_bmdma_port_start(struct ata_port *ap); 1995 extern int ata_bmdma_port_start32(struct ata_port *ap); 1996 1997 #ifdef CONFIG_PCI 1998 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 1999 extern void ata_pci_bmdma_init(struct ata_host *host); 2000 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev, 2001 const struct ata_port_info * const * ppi, 2002 struct ata_host **r_host); 2003 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev, 2004 const struct ata_port_info * const * ppi, 2005 struct scsi_host_template *sht, 2006 void *host_priv, int hflags); 2007 #endif /* CONFIG_PCI */ 2008 #endif /* CONFIG_ATA_BMDMA */ 2009 2010 /** 2011 * ata_sff_busy_wait - Wait for a port status register 2012 * @ap: Port to wait for. 2013 * @bits: bits that must be clear 2014 * @max: number of 10uS waits to perform 2015 * 2016 * Waits up to max*10 microseconds for the selected bits in the port's 2017 * status register to be cleared. 2018 * Returns final value of status register. 2019 * 2020 * LOCKING: 2021 * Inherited from caller. 2022 */ 2023 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 2024 unsigned int max) 2025 { 2026 u8 status; 2027 2028 do { 2029 udelay(10); 2030 status = ap->ops->sff_check_status(ap); 2031 max--; 2032 } while (status != 0xff && (status & bits) && (max > 0)); 2033 2034 return status; 2035 } 2036 2037 /** 2038 * ata_wait_idle - Wait for a port to be idle. 2039 * @ap: Port to wait for. 2040 * 2041 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 2042 * Returns final value of status register. 2043 * 2044 * LOCKING: 2045 * Inherited from caller. 2046 */ 2047 static inline u8 ata_wait_idle(struct ata_port *ap) 2048 { 2049 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 2050 2051 #ifdef ATA_DEBUG 2052 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 2053 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 2054 status); 2055 #endif 2056 2057 return status; 2058 } 2059 #endif /* CONFIG_ATA_SFF */ 2060 2061 #endif /* __LINUX_LIBATA_H__ */ 2062