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 ATA_HORKAGE_NO_NCQ_ON_ATI = (1 << 27), /* Disable NCQ on ATI chipset */ 430 431 /* DMA mask for user DMA control: User visible values; DO NOT 432 renumber */ 433 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */ 434 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */ 435 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */ 436 437 /* ATAPI command types */ 438 ATAPI_READ = 0, /* READs */ 439 ATAPI_WRITE = 1, /* WRITEs */ 440 ATAPI_READ_CD = 2, /* READ CD [MSF] */ 441 ATAPI_PASS_THRU = 3, /* SAT pass-thru */ 442 ATAPI_MISC = 4, /* the rest */ 443 444 /* Timing constants */ 445 ATA_TIMING_SETUP = (1 << 0), 446 ATA_TIMING_ACT8B = (1 << 1), 447 ATA_TIMING_REC8B = (1 << 2), 448 ATA_TIMING_CYC8B = (1 << 3), 449 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 450 ATA_TIMING_CYC8B, 451 ATA_TIMING_ACTIVE = (1 << 4), 452 ATA_TIMING_RECOVER = (1 << 5), 453 ATA_TIMING_DMACK_HOLD = (1 << 6), 454 ATA_TIMING_CYCLE = (1 << 7), 455 ATA_TIMING_UDMA = (1 << 8), 456 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 457 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 458 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 459 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE | 460 ATA_TIMING_UDMA, 461 462 /* ACPI constants */ 463 ATA_ACPI_FILTER_SETXFER = 1 << 0, 464 ATA_ACPI_FILTER_LOCK = 1 << 1, 465 ATA_ACPI_FILTER_DIPM = 1 << 2, 466 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */ 467 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */ 468 469 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | 470 ATA_ACPI_FILTER_LOCK | 471 ATA_ACPI_FILTER_DIPM, 472 }; 473 474 enum ata_xfer_mask { 475 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1) 476 << ATA_SHIFT_PIO, 477 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1) 478 << ATA_SHIFT_MWDMA, 479 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1) 480 << ATA_SHIFT_UDMA, 481 }; 482 483 enum hsm_task_states { 484 HSM_ST_IDLE, /* no command on going */ 485 HSM_ST_FIRST, /* (waiting the device to) 486 write CDB or first data block */ 487 HSM_ST, /* (waiting the device to) transfer data */ 488 HSM_ST_LAST, /* (waiting the device to) complete command */ 489 HSM_ST_ERR, /* error */ 490 }; 491 492 enum ata_completion_errors { 493 AC_ERR_OK = 0, /* no error */ 494 AC_ERR_DEV = (1 << 0), /* device reported error */ 495 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 496 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 497 AC_ERR_MEDIA = (1 << 3), /* media error */ 498 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 499 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 500 AC_ERR_SYSTEM = (1 << 6), /* system error */ 501 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 502 AC_ERR_OTHER = (1 << 8), /* unknown */ 503 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 504 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 505 }; 506 507 /* 508 * Link power management policy: If you alter this, you also need to 509 * alter libata-scsi.c (for the ascii descriptions) 510 */ 511 enum ata_lpm_policy { 512 ATA_LPM_UNKNOWN, 513 ATA_LPM_MAX_POWER, 514 ATA_LPM_MED_POWER, 515 ATA_LPM_MED_POWER_WITH_DIPM, /* Med power + DIPM as win IRST does */ 516 ATA_LPM_MIN_POWER_WITH_PARTIAL, /* Min Power + partial and slumber */ 517 ATA_LPM_MIN_POWER, /* Min power + no partial (slumber only) */ 518 }; 519 520 enum ata_lpm_hints { 521 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */ 522 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */ 523 ATA_LPM_WAKE_ONLY = (1 << 2), /* only wake up link */ 524 }; 525 526 /* forward declarations */ 527 struct scsi_device; 528 struct ata_port_operations; 529 struct ata_port; 530 struct ata_link; 531 struct ata_queued_cmd; 532 533 /* typedefs */ 534 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 535 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 536 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 537 unsigned long deadline); 538 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 539 540 extern struct device_attribute dev_attr_unload_heads; 541 #ifdef CONFIG_SATA_HOST 542 extern struct device_attribute dev_attr_link_power_management_policy; 543 extern struct device_attribute dev_attr_ncq_prio_supported; 544 extern struct device_attribute dev_attr_ncq_prio_enable; 545 extern struct device_attribute dev_attr_em_message_type; 546 extern struct device_attribute dev_attr_em_message; 547 extern struct device_attribute dev_attr_sw_activity; 548 #endif 549 550 enum sw_activity { 551 OFF, 552 BLINK_ON, 553 BLINK_OFF, 554 }; 555 556 struct ata_taskfile { 557 unsigned long flags; /* ATA_TFLAG_xxx */ 558 u8 protocol; /* ATA_PROT_xxx */ 559 560 u8 ctl; /* control reg */ 561 562 u8 hob_feature; /* additional data */ 563 u8 hob_nsect; /* to support LBA48 */ 564 u8 hob_lbal; 565 u8 hob_lbam; 566 u8 hob_lbah; 567 568 u8 feature; 569 u8 nsect; 570 u8 lbal; 571 u8 lbam; 572 u8 lbah; 573 574 u8 device; 575 576 u8 command; /* IO operation */ 577 578 u32 auxiliary; /* auxiliary field */ 579 /* from SATA 3.1 and */ 580 /* ATA-8 ACS-3 */ 581 }; 582 583 #ifdef CONFIG_ATA_SFF 584 struct ata_ioports { 585 void __iomem *cmd_addr; 586 void __iomem *data_addr; 587 void __iomem *error_addr; 588 void __iomem *feature_addr; 589 void __iomem *nsect_addr; 590 void __iomem *lbal_addr; 591 void __iomem *lbam_addr; 592 void __iomem *lbah_addr; 593 void __iomem *device_addr; 594 void __iomem *status_addr; 595 void __iomem *command_addr; 596 void __iomem *altstatus_addr; 597 void __iomem *ctl_addr; 598 #ifdef CONFIG_ATA_BMDMA 599 void __iomem *bmdma_addr; 600 #endif /* CONFIG_ATA_BMDMA */ 601 void __iomem *scr_addr; 602 }; 603 #endif /* CONFIG_ATA_SFF */ 604 605 struct ata_host { 606 spinlock_t lock; 607 struct device *dev; 608 void __iomem * const *iomap; 609 unsigned int n_ports; 610 unsigned int n_tags; /* nr of NCQ tags */ 611 void *private_data; 612 struct ata_port_operations *ops; 613 unsigned long flags; 614 struct kref kref; 615 616 struct mutex eh_mutex; 617 struct task_struct *eh_owner; 618 619 struct ata_port *simplex_claimed; /* channel owning the DMA */ 620 struct ata_port *ports[]; 621 }; 622 623 struct ata_queued_cmd { 624 struct ata_port *ap; 625 struct ata_device *dev; 626 627 struct scsi_cmnd *scsicmd; 628 void (*scsidone)(struct scsi_cmnd *); 629 630 struct ata_taskfile tf; 631 u8 cdb[ATAPI_CDB_LEN]; 632 633 unsigned long flags; /* ATA_QCFLAG_xxx */ 634 unsigned int tag; /* libata core tag */ 635 unsigned int hw_tag; /* driver tag */ 636 unsigned int n_elem; 637 unsigned int orig_n_elem; 638 639 int dma_dir; 640 641 unsigned int sect_size; 642 643 unsigned int nbytes; 644 unsigned int extrabytes; 645 unsigned int curbytes; 646 647 struct scatterlist sgent; 648 649 struct scatterlist *sg; 650 651 struct scatterlist *cursg; 652 unsigned int cursg_ofs; 653 654 unsigned int err_mask; 655 struct ata_taskfile result_tf; 656 ata_qc_cb_t complete_fn; 657 658 void *private_data; 659 void *lldd_task; 660 }; 661 662 struct ata_port_stats { 663 unsigned long unhandled_irq; 664 unsigned long idle_irq; 665 unsigned long rw_reqbuf; 666 }; 667 668 struct ata_ering_entry { 669 unsigned int eflags; 670 unsigned int err_mask; 671 u64 timestamp; 672 }; 673 674 struct ata_ering { 675 int cursor; 676 struct ata_ering_entry ring[ATA_ERING_SIZE]; 677 }; 678 679 struct ata_device { 680 struct ata_link *link; 681 unsigned int devno; /* 0 or 1 */ 682 unsigned int horkage; /* List of broken features */ 683 unsigned long flags; /* ATA_DFLAG_xxx */ 684 struct scsi_device *sdev; /* attached SCSI device */ 685 void *private_data; 686 #ifdef CONFIG_ATA_ACPI 687 union acpi_object *gtf_cache; 688 unsigned int gtf_filter; 689 #endif 690 #ifdef CONFIG_SATA_ZPODD 691 void *zpodd; 692 #endif 693 struct device tdev; 694 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */ 695 u64 n_sectors; /* size of device, if ATA */ 696 u64 n_native_sectors; /* native size, if ATA */ 697 unsigned int class; /* ATA_DEV_xxx */ 698 unsigned long unpark_deadline; 699 700 u8 pio_mode; 701 u8 dma_mode; 702 u8 xfer_mode; 703 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 704 705 unsigned int multi_count; /* sectors count for 706 READ/WRITE MULTIPLE */ 707 unsigned int max_sectors; /* per-device max sectors */ 708 unsigned int cdb_len; 709 710 /* per-dev xfer mask */ 711 unsigned long pio_mask; 712 unsigned long mwdma_mask; 713 unsigned long udma_mask; 714 715 /* for CHS addressing */ 716 u16 cylinders; /* Number of cylinders */ 717 u16 heads; /* Number of heads */ 718 u16 sectors; /* Number of sectors per track */ 719 720 union { 721 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 722 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 723 } ____cacheline_aligned; 724 725 /* DEVSLP Timing Variables from Identify Device Data Log */ 726 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE]; 727 728 /* NCQ send and receive log subcommand support */ 729 u8 ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE]; 730 u8 ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_SIZE]; 731 732 /* ZAC zone configuration */ 733 u32 zac_zoned_cap; 734 u32 zac_zones_optimal_open; 735 u32 zac_zones_optimal_nonseq; 736 u32 zac_zones_max_open; 737 738 /* error history */ 739 int spdn_cnt; 740 /* ering is CLEAR_END, read comment above CLEAR_END */ 741 struct ata_ering ering; 742 }; 743 744 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are 745 * cleared to zero on ata_dev_init(). 746 */ 747 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors) 748 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering) 749 750 struct ata_eh_info { 751 struct ata_device *dev; /* offending device */ 752 u32 serror; /* SError from LLDD */ 753 unsigned int err_mask; /* port-wide err_mask */ 754 unsigned int action; /* ATA_EH_* action mask */ 755 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 756 unsigned int flags; /* ATA_EHI_* flags */ 757 758 unsigned int probe_mask; 759 760 char desc[ATA_EH_DESC_LEN]; 761 int desc_len; 762 }; 763 764 struct ata_eh_context { 765 struct ata_eh_info i; 766 int tries[ATA_MAX_DEVICES]; 767 int cmd_timeout_idx[ATA_MAX_DEVICES] 768 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE]; 769 unsigned int classes[ATA_MAX_DEVICES]; 770 unsigned int did_probe_mask; 771 unsigned int unloaded_mask; 772 unsigned int saved_ncq_enabled; 773 u8 saved_xfer_mode[ATA_MAX_DEVICES]; 774 /* timestamp for the last reset attempt or success */ 775 unsigned long last_reset; 776 }; 777 778 struct ata_acpi_drive 779 { 780 u32 pio; 781 u32 dma; 782 } __packed; 783 784 struct ata_acpi_gtm { 785 struct ata_acpi_drive drive[2]; 786 u32 flags; 787 } __packed; 788 789 struct ata_link { 790 struct ata_port *ap; 791 int pmp; /* port multiplier port # */ 792 793 struct device tdev; 794 unsigned int active_tag; /* active tag on this link */ 795 u32 sactive; /* active NCQ commands */ 796 797 unsigned int flags; /* ATA_LFLAG_xxx */ 798 799 u32 saved_scontrol; /* SControl on probe */ 800 unsigned int hw_sata_spd_limit; 801 unsigned int sata_spd_limit; 802 unsigned int sata_spd; /* current SATA PHY speed */ 803 enum ata_lpm_policy lpm_policy; 804 805 /* record runtime error info, protected by host_set lock */ 806 struct ata_eh_info eh_info; 807 /* EH context */ 808 struct ata_eh_context eh_context; 809 810 struct ata_device device[ATA_MAX_DEVICES]; 811 812 unsigned long last_lpm_change; /* when last LPM change happened */ 813 }; 814 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag) 815 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0]) 816 817 struct ata_port { 818 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 819 struct ata_port_operations *ops; 820 spinlock_t *lock; 821 /* Flags owned by the EH context. Only EH should touch these once the 822 port is active */ 823 unsigned long flags; /* ATA_FLAG_xxx */ 824 /* Flags that change dynamically, protected by ap->lock */ 825 unsigned int pflags; /* ATA_PFLAG_xxx */ 826 unsigned int print_id; /* user visible unique port ID */ 827 unsigned int local_port_no; /* host local port num */ 828 unsigned int port_no; /* 0 based port no. inside the host */ 829 830 #ifdef CONFIG_ATA_SFF 831 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 832 u8 ctl; /* cache of ATA control register */ 833 u8 last_ctl; /* Cache last written value */ 834 struct ata_link* sff_pio_task_link; /* link currently used */ 835 struct delayed_work sff_pio_task; 836 #ifdef CONFIG_ATA_BMDMA 837 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */ 838 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */ 839 #endif /* CONFIG_ATA_BMDMA */ 840 #endif /* CONFIG_ATA_SFF */ 841 842 unsigned int pio_mask; 843 unsigned int mwdma_mask; 844 unsigned int udma_mask; 845 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 846 847 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE + 1]; 848 unsigned long sas_tag_allocated; /* for sas tag allocation only */ 849 u64 qc_active; 850 int nr_active_links; /* #links with active qcs */ 851 unsigned int sas_last_tag; /* track next tag hw expects */ 852 853 struct ata_link link; /* host default link */ 854 struct ata_link *slave_link; /* see ata_slave_link_init() */ 855 856 int nr_pmp_links; /* nr of available PMP links */ 857 struct ata_link *pmp_link; /* array of PMP links */ 858 struct ata_link *excl_link; /* for PMP qc exclusion */ 859 860 struct ata_port_stats stats; 861 struct ata_host *host; 862 struct device *dev; 863 struct device tdev; 864 865 struct mutex scsi_scan_mutex; 866 struct delayed_work hotplug_task; 867 struct work_struct scsi_rescan_task; 868 869 unsigned int hsm_task_state; 870 871 u32 msg_enable; 872 struct list_head eh_done_q; 873 wait_queue_head_t eh_wait_q; 874 int eh_tries; 875 struct completion park_req_pending; 876 877 pm_message_t pm_mesg; 878 enum ata_lpm_policy target_lpm_policy; 879 880 struct timer_list fastdrain_timer; 881 unsigned long fastdrain_cnt; 882 883 async_cookie_t cookie; 884 885 int em_message_type; 886 void *private_data; 887 888 #ifdef CONFIG_ATA_ACPI 889 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */ 890 #endif 891 /* owned by EH */ 892 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned; 893 }; 894 895 /* The following initializer overrides a method to NULL whether one of 896 * its parent has the method defined or not. This is equivalent to 897 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant 898 * expression and thus can't be used as an initializer. 899 */ 900 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT) 901 902 struct ata_port_operations { 903 /* 904 * Command execution 905 */ 906 int (*qc_defer)(struct ata_queued_cmd *qc); 907 int (*check_atapi_dma)(struct ata_queued_cmd *qc); 908 enum ata_completion_errors (*qc_prep)(struct ata_queued_cmd *qc); 909 unsigned int (*qc_issue)(struct ata_queued_cmd *qc); 910 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc); 911 912 /* 913 * Configuration and exception handling 914 */ 915 int (*cable_detect)(struct ata_port *ap); 916 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask); 917 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev); 918 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev); 919 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev); 920 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id); 921 922 void (*dev_config)(struct ata_device *dev); 923 924 void (*freeze)(struct ata_port *ap); 925 void (*thaw)(struct ata_port *ap); 926 ata_prereset_fn_t prereset; 927 ata_reset_fn_t softreset; 928 ata_reset_fn_t hardreset; 929 ata_postreset_fn_t postreset; 930 ata_prereset_fn_t pmp_prereset; 931 ata_reset_fn_t pmp_softreset; 932 ata_reset_fn_t pmp_hardreset; 933 ata_postreset_fn_t pmp_postreset; 934 void (*error_handler)(struct ata_port *ap); 935 void (*lost_interrupt)(struct ata_port *ap); 936 void (*post_internal_cmd)(struct ata_queued_cmd *qc); 937 void (*sched_eh)(struct ata_port *ap); 938 void (*end_eh)(struct ata_port *ap); 939 940 /* 941 * Optional features 942 */ 943 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val); 944 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val); 945 void (*pmp_attach)(struct ata_port *ap); 946 void (*pmp_detach)(struct ata_port *ap); 947 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy, 948 unsigned hints); 949 950 /* 951 * Start, stop, suspend and resume 952 */ 953 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg); 954 int (*port_resume)(struct ata_port *ap); 955 int (*port_start)(struct ata_port *ap); 956 void (*port_stop)(struct ata_port *ap); 957 void (*host_stop)(struct ata_host *host); 958 959 #ifdef CONFIG_ATA_SFF 960 /* 961 * SFF / taskfile oriented ops 962 */ 963 void (*sff_dev_select)(struct ata_port *ap, unsigned int device); 964 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl); 965 u8 (*sff_check_status)(struct ata_port *ap); 966 u8 (*sff_check_altstatus)(struct ata_port *ap); 967 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf); 968 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf); 969 void (*sff_exec_command)(struct ata_port *ap, 970 const struct ata_taskfile *tf); 971 unsigned int (*sff_data_xfer)(struct ata_queued_cmd *qc, 972 unsigned char *buf, unsigned int buflen, int rw); 973 void (*sff_irq_on)(struct ata_port *); 974 bool (*sff_irq_check)(struct ata_port *); 975 void (*sff_irq_clear)(struct ata_port *); 976 void (*sff_drain_fifo)(struct ata_queued_cmd *qc); 977 978 #ifdef CONFIG_ATA_BMDMA 979 void (*bmdma_setup)(struct ata_queued_cmd *qc); 980 void (*bmdma_start)(struct ata_queued_cmd *qc); 981 void (*bmdma_stop)(struct ata_queued_cmd *qc); 982 u8 (*bmdma_status)(struct ata_port *ap); 983 #endif /* CONFIG_ATA_BMDMA */ 984 #endif /* CONFIG_ATA_SFF */ 985 986 ssize_t (*em_show)(struct ata_port *ap, char *buf); 987 ssize_t (*em_store)(struct ata_port *ap, const char *message, 988 size_t size); 989 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf); 990 ssize_t (*sw_activity_store)(struct ata_device *dev, 991 enum sw_activity val); 992 ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state, 993 ssize_t size); 994 995 /* 996 * Obsolete 997 */ 998 void (*phy_reset)(struct ata_port *ap); 999 void (*eng_timeout)(struct ata_port *ap); 1000 1001 /* 1002 * ->inherits must be the last field and all the preceding 1003 * fields must be pointers. 1004 */ 1005 const struct ata_port_operations *inherits; 1006 }; 1007 1008 struct ata_port_info { 1009 unsigned long flags; 1010 unsigned long link_flags; 1011 unsigned long pio_mask; 1012 unsigned long mwdma_mask; 1013 unsigned long udma_mask; 1014 struct ata_port_operations *port_ops; 1015 void *private_data; 1016 }; 1017 1018 struct ata_timing { 1019 unsigned short mode; /* ATA mode */ 1020 unsigned short setup; /* t1 */ 1021 unsigned short act8b; /* t2 for 8-bit I/O */ 1022 unsigned short rec8b; /* t2i for 8-bit I/O */ 1023 unsigned short cyc8b; /* t0 for 8-bit I/O */ 1024 unsigned short active; /* t2 or tD */ 1025 unsigned short recover; /* t2i or tK */ 1026 unsigned short dmack_hold; /* tj */ 1027 unsigned short cycle; /* t0 */ 1028 unsigned short udma; /* t2CYCTYP/2 */ 1029 }; 1030 1031 /* 1032 * Core layer - drivers/ata/libata-core.c 1033 */ 1034 extern struct ata_port_operations ata_dummy_port_ops; 1035 extern const struct ata_port_info ata_dummy_port_info; 1036 1037 static inline bool ata_is_atapi(u8 prot) 1038 { 1039 return prot & ATA_PROT_FLAG_ATAPI; 1040 } 1041 1042 static inline bool ata_is_pio(u8 prot) 1043 { 1044 return prot & ATA_PROT_FLAG_PIO; 1045 } 1046 1047 static inline bool ata_is_dma(u8 prot) 1048 { 1049 return prot & ATA_PROT_FLAG_DMA; 1050 } 1051 1052 static inline bool ata_is_ncq(u8 prot) 1053 { 1054 return prot & ATA_PROT_FLAG_NCQ; 1055 } 1056 1057 static inline bool ata_is_data(u8 prot) 1058 { 1059 return prot & (ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA); 1060 } 1061 1062 static inline int is_multi_taskfile(struct ata_taskfile *tf) 1063 { 1064 return (tf->command == ATA_CMD_READ_MULTI) || 1065 (tf->command == ATA_CMD_WRITE_MULTI) || 1066 (tf->command == ATA_CMD_READ_MULTI_EXT) || 1067 (tf->command == ATA_CMD_WRITE_MULTI_EXT) || 1068 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT); 1069 } 1070 1071 static inline int ata_port_is_dummy(struct ata_port *ap) 1072 { 1073 return ap->ops == &ata_dummy_port_ops; 1074 } 1075 1076 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 1077 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 1078 int (*check_ready)(struct ata_link *link)); 1079 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 1080 unsigned long deadline); 1081 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 1082 1083 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 1084 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 1085 const struct ata_port_info * const * ppi, int n_ports); 1086 extern void ata_host_get(struct ata_host *host); 1087 extern void ata_host_put(struct ata_host *host); 1088 extern int ata_host_start(struct ata_host *host); 1089 extern int ata_host_register(struct ata_host *host, 1090 struct scsi_host_template *sht); 1091 extern int ata_host_activate(struct ata_host *host, int irq, 1092 irq_handler_t irq_handler, unsigned long irq_flags, 1093 struct scsi_host_template *sht); 1094 extern void ata_host_detach(struct ata_host *host); 1095 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *); 1096 extern int ata_scsi_detect(struct scsi_host_template *sht); 1097 extern int ata_scsi_ioctl(struct scsi_device *dev, unsigned int cmd, 1098 void __user *arg); 1099 #ifdef CONFIG_COMPAT 1100 #define ATA_SCSI_COMPAT_IOCTL .compat_ioctl = ata_scsi_ioctl, 1101 #else 1102 #define ATA_SCSI_COMPAT_IOCTL /* empty */ 1103 #endif 1104 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd); 1105 #if IS_REACHABLE(CONFIG_ATA) 1106 bool ata_scsi_dma_need_drain(struct request *rq); 1107 #else 1108 #define ata_scsi_dma_need_drain NULL 1109 #endif 1110 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev, 1111 unsigned int cmd, void __user *arg); 1112 extern bool ata_link_online(struct ata_link *link); 1113 extern bool ata_link_offline(struct ata_link *link); 1114 #ifdef CONFIG_PM 1115 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 1116 extern void ata_host_resume(struct ata_host *host); 1117 extern void ata_sas_port_suspend(struct ata_port *ap); 1118 extern void ata_sas_port_resume(struct ata_port *ap); 1119 #else 1120 static inline void ata_sas_port_suspend(struct ata_port *ap) 1121 { 1122 } 1123 static inline void ata_sas_port_resume(struct ata_port *ap) 1124 { 1125 } 1126 #endif 1127 extern int ata_ratelimit(void); 1128 extern void ata_msleep(struct ata_port *ap, unsigned int msecs); 1129 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, 1130 u32 val, unsigned long interval, unsigned long timeout); 1131 extern int atapi_cmd_type(u8 opcode); 1132 extern unsigned long ata_pack_xfermask(unsigned long pio_mask, 1133 unsigned long mwdma_mask, unsigned long udma_mask); 1134 extern void ata_unpack_xfermask(unsigned long xfer_mask, 1135 unsigned long *pio_mask, unsigned long *mwdma_mask, 1136 unsigned long *udma_mask); 1137 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask); 1138 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode); 1139 extern int ata_xfer_mode2shift(unsigned long xfer_mode); 1140 extern const char *ata_mode_string(unsigned long xfer_mask); 1141 extern unsigned long ata_id_xfermask(const u16 *id); 1142 extern int ata_std_qc_defer(struct ata_queued_cmd *qc); 1143 extern enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc); 1144 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 1145 unsigned int n_elem); 1146 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 1147 extern void ata_dev_disable(struct ata_device *adev); 1148 extern void ata_id_string(const u16 *id, unsigned char *s, 1149 unsigned int ofs, unsigned int len); 1150 extern void ata_id_c_string(const u16 *id, unsigned char *s, 1151 unsigned int ofs, unsigned int len); 1152 extern unsigned int ata_do_dev_read_id(struct ata_device *dev, 1153 struct ata_taskfile *tf, u16 *id); 1154 extern void ata_qc_complete(struct ata_queued_cmd *qc); 1155 extern u64 ata_qc_get_active(struct ata_port *ap); 1156 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd); 1157 extern int ata_std_bios_param(struct scsi_device *sdev, 1158 struct block_device *bdev, 1159 sector_t capacity, int geom[]); 1160 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev); 1161 extern int ata_scsi_slave_config(struct scsi_device *sdev); 1162 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 1163 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 1164 int queue_depth); 1165 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev, 1166 int queue_depth); 1167 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 1168 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 1169 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap); 1170 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q); 1171 1172 /* 1173 * SATA specific code - drivers/ata/libata-sata.c 1174 */ 1175 #ifdef CONFIG_SATA_HOST 1176 extern const unsigned long sata_deb_timing_normal[]; 1177 extern const unsigned long sata_deb_timing_hotplug[]; 1178 extern const unsigned long sata_deb_timing_long[]; 1179 1180 static inline const unsigned long * 1181 sata_ehc_deb_timing(struct ata_eh_context *ehc) 1182 { 1183 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 1184 return sata_deb_timing_hotplug; 1185 else 1186 return sata_deb_timing_normal; 1187 } 1188 1189 extern int sata_scr_valid(struct ata_link *link); 1190 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 1191 extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 1192 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 1193 extern int sata_set_spd(struct ata_link *link); 1194 extern int sata_link_hardreset(struct ata_link *link, 1195 const unsigned long *timing, unsigned long deadline, 1196 bool *online, int (*check_ready)(struct ata_link *)); 1197 extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 1198 unsigned long deadline); 1199 extern void ata_eh_analyze_ncq_error(struct ata_link *link); 1200 #else 1201 static inline const unsigned long * 1202 sata_ehc_deb_timing(struct ata_eh_context *ehc) 1203 { 1204 return NULL; 1205 } 1206 static inline int sata_scr_valid(struct ata_link *link) { return 0; } 1207 static inline int sata_scr_read(struct ata_link *link, int reg, u32 *val) 1208 { 1209 return -EOPNOTSUPP; 1210 } 1211 static inline int sata_scr_write(struct ata_link *link, int reg, u32 val) 1212 { 1213 return -EOPNOTSUPP; 1214 } 1215 static inline int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) 1216 { 1217 return -EOPNOTSUPP; 1218 } 1219 static inline int sata_set_spd(struct ata_link *link) { return -EOPNOTSUPP; } 1220 static inline int sata_link_hardreset(struct ata_link *link, 1221 const unsigned long *timing, 1222 unsigned long deadline, 1223 bool *online, 1224 int (*check_ready)(struct ata_link *)) 1225 { 1226 if (online) 1227 *online = false; 1228 return -EOPNOTSUPP; 1229 } 1230 static inline int sata_link_resume(struct ata_link *link, 1231 const unsigned long *params, 1232 unsigned long deadline) 1233 { 1234 return -EOPNOTSUPP; 1235 } 1236 static inline void ata_eh_analyze_ncq_error(struct ata_link *link) { } 1237 #endif 1238 extern int sata_link_debounce(struct ata_link *link, 1239 const unsigned long *params, unsigned long deadline); 1240 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, 1241 bool spm_wakeup); 1242 extern int ata_slave_link_init(struct ata_port *ap); 1243 extern void ata_sas_port_destroy(struct ata_port *); 1244 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 1245 struct ata_port_info *, struct Scsi_Host *); 1246 extern void ata_sas_async_probe(struct ata_port *ap); 1247 extern int ata_sas_sync_probe(struct ata_port *ap); 1248 extern int ata_sas_port_init(struct ata_port *); 1249 extern int ata_sas_port_start(struct ata_port *ap); 1250 extern int ata_sas_tport_add(struct device *parent, struct ata_port *ap); 1251 extern void ata_sas_tport_delete(struct ata_port *ap); 1252 extern void ata_sas_port_stop(struct ata_port *ap); 1253 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 1254 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap); 1255 extern void ata_tf_to_fis(const struct ata_taskfile *tf, 1256 u8 pmp, int is_cmd, u8 *fis); 1257 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 1258 extern int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active); 1259 extern bool sata_lpm_ignore_phy_events(struct ata_link *link); 1260 extern int sata_async_notification(struct ata_port *ap); 1261 1262 extern int ata_cable_40wire(struct ata_port *ap); 1263 extern int ata_cable_80wire(struct ata_port *ap); 1264 extern int ata_cable_sata(struct ata_port *ap); 1265 extern int ata_cable_ignore(struct ata_port *ap); 1266 extern int ata_cable_unknown(struct ata_port *ap); 1267 1268 /* Timing helpers */ 1269 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 1270 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle); 1271 1272 /* PCI */ 1273 #ifdef CONFIG_PCI 1274 struct pci_dev; 1275 1276 struct pci_bits { 1277 unsigned int reg; /* PCI config register to read */ 1278 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 1279 unsigned long mask; 1280 unsigned long val; 1281 }; 1282 1283 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 1284 extern void ata_pci_shutdown_one(struct pci_dev *pdev); 1285 extern void ata_pci_remove_one(struct pci_dev *pdev); 1286 1287 #ifdef CONFIG_PM 1288 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 1289 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 1290 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 1291 extern int ata_pci_device_resume(struct pci_dev *pdev); 1292 #endif /* CONFIG_PM */ 1293 #endif /* CONFIG_PCI */ 1294 1295 struct platform_device; 1296 1297 extern int ata_platform_remove_one(struct platform_device *pdev); 1298 1299 /* 1300 * ACPI - drivers/ata/libata-acpi.c 1301 */ 1302 #ifdef CONFIG_ATA_ACPI 1303 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1304 { 1305 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID) 1306 return &ap->__acpi_init_gtm; 1307 return NULL; 1308 } 1309 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm); 1310 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm); 1311 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, 1312 const struct ata_acpi_gtm *gtm); 1313 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm); 1314 #else 1315 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap) 1316 { 1317 return NULL; 1318 } 1319 1320 static inline int ata_acpi_stm(const struct ata_port *ap, 1321 struct ata_acpi_gtm *stm) 1322 { 1323 return -ENOSYS; 1324 } 1325 1326 static inline int ata_acpi_gtm(const struct ata_port *ap, 1327 struct ata_acpi_gtm *stm) 1328 { 1329 return -ENOSYS; 1330 } 1331 1332 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev, 1333 const struct ata_acpi_gtm *gtm) 1334 { 1335 return 0; 1336 } 1337 1338 static inline int ata_acpi_cbl_80wire(struct ata_port *ap, 1339 const struct ata_acpi_gtm *gtm) 1340 { 1341 return 0; 1342 } 1343 #endif 1344 1345 /* 1346 * EH - drivers/ata/libata-eh.c 1347 */ 1348 extern void ata_port_schedule_eh(struct ata_port *ap); 1349 extern void ata_port_wait_eh(struct ata_port *ap); 1350 extern int ata_link_abort(struct ata_link *link); 1351 extern int ata_port_abort(struct ata_port *ap); 1352 extern int ata_port_freeze(struct ata_port *ap); 1353 1354 extern void ata_eh_freeze_port(struct ata_port *ap); 1355 extern void ata_eh_thaw_port(struct ata_port *ap); 1356 1357 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 1358 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 1359 1360 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 1361 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 1362 ata_postreset_fn_t postreset); 1363 extern void ata_std_error_handler(struct ata_port *ap); 1364 extern void ata_std_sched_eh(struct ata_port *ap); 1365 extern void ata_std_end_eh(struct ata_port *ap); 1366 extern int ata_link_nr_enabled(struct ata_link *link); 1367 1368 /* 1369 * Base operations to inherit from and initializers for sht 1370 * 1371 * Operations 1372 * 1373 * base : Common to all libata drivers. 1374 * sata : SATA controllers w/ native interface. 1375 * pmp : SATA controllers w/ PMP support. 1376 * sff : SFF ATA controllers w/o BMDMA support. 1377 * bmdma : SFF ATA controllers w/ BMDMA support. 1378 * 1379 * sht initializers 1380 * 1381 * BASE : Common to all libata drivers. The user must set 1382 * sg_tablesize and dma_boundary. 1383 * PIO : SFF ATA controllers w/ only PIO support. 1384 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and 1385 * dma_boundary are set to BMDMA limits. 1386 * NCQ : SATA controllers supporting NCQ. The user must set 1387 * sg_tablesize, dma_boundary and can_queue. 1388 */ 1389 extern const struct ata_port_operations ata_base_port_ops; 1390 extern const struct ata_port_operations sata_port_ops; 1391 extern struct device_attribute *ata_common_sdev_attrs[]; 1392 1393 /* 1394 * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated 1395 * by the edge drivers. Because the 'module' field of sht must be the 1396 * edge driver's module reference, otherwise the driver can be unloaded 1397 * even if the scsi_device is being accessed. 1398 */ 1399 #define __ATA_BASE_SHT(drv_name) \ 1400 .module = THIS_MODULE, \ 1401 .name = drv_name, \ 1402 .ioctl = ata_scsi_ioctl, \ 1403 ATA_SCSI_COMPAT_IOCTL \ 1404 .queuecommand = ata_scsi_queuecmd, \ 1405 .dma_need_drain = ata_scsi_dma_need_drain, \ 1406 .this_id = ATA_SHT_THIS_ID, \ 1407 .emulated = ATA_SHT_EMULATED, \ 1408 .proc_name = drv_name, \ 1409 .slave_destroy = ata_scsi_slave_destroy, \ 1410 .bios_param = ata_std_bios_param, \ 1411 .unlock_native_capacity = ata_scsi_unlock_native_capacity 1412 1413 #define ATA_SUBBASE_SHT(drv_name) \ 1414 __ATA_BASE_SHT(drv_name), \ 1415 .can_queue = ATA_DEF_QUEUE, \ 1416 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \ 1417 .slave_configure = ata_scsi_slave_config 1418 1419 #define ATA_BASE_SHT(drv_name) \ 1420 ATA_SUBBASE_SHT(drv_name), \ 1421 .sdev_attrs = ata_common_sdev_attrs 1422 1423 #ifdef CONFIG_SATA_HOST 1424 extern struct device_attribute *ata_ncq_sdev_attrs[]; 1425 1426 #define ATA_NCQ_SHT(drv_name) \ 1427 ATA_SUBBASE_SHT(drv_name), \ 1428 .sdev_attrs = ata_ncq_sdev_attrs, \ 1429 .change_queue_depth = ata_scsi_change_queue_depth 1430 #endif 1431 1432 /* 1433 * PMP helpers 1434 */ 1435 #ifdef CONFIG_SATA_PMP 1436 static inline bool sata_pmp_supported(struct ata_port *ap) 1437 { 1438 return ap->flags & ATA_FLAG_PMP; 1439 } 1440 1441 static inline bool sata_pmp_attached(struct ata_port *ap) 1442 { 1443 return ap->nr_pmp_links != 0; 1444 } 1445 1446 static inline bool ata_is_host_link(const struct ata_link *link) 1447 { 1448 return link == &link->ap->link || link == link->ap->slave_link; 1449 } 1450 #else /* CONFIG_SATA_PMP */ 1451 static inline bool sata_pmp_supported(struct ata_port *ap) 1452 { 1453 return false; 1454 } 1455 1456 static inline bool sata_pmp_attached(struct ata_port *ap) 1457 { 1458 return false; 1459 } 1460 1461 static inline bool ata_is_host_link(const struct ata_link *link) 1462 { 1463 return true; 1464 } 1465 #endif /* CONFIG_SATA_PMP */ 1466 1467 static inline int sata_srst_pmp(struct ata_link *link) 1468 { 1469 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) 1470 return SATA_PMP_CTRL_PORT; 1471 return link->pmp; 1472 } 1473 1474 /* 1475 * printk helpers 1476 */ 1477 __printf(3, 4) 1478 void ata_port_printk(const struct ata_port *ap, const char *level, 1479 const char *fmt, ...); 1480 __printf(3, 4) 1481 void ata_link_printk(const struct ata_link *link, const char *level, 1482 const char *fmt, ...); 1483 __printf(3, 4) 1484 void ata_dev_printk(const struct ata_device *dev, const char *level, 1485 const char *fmt, ...); 1486 1487 #define ata_port_err(ap, fmt, ...) \ 1488 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__) 1489 #define ata_port_warn(ap, fmt, ...) \ 1490 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__) 1491 #define ata_port_notice(ap, fmt, ...) \ 1492 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__) 1493 #define ata_port_info(ap, fmt, ...) \ 1494 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__) 1495 #define ata_port_dbg(ap, fmt, ...) \ 1496 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__) 1497 1498 #define ata_link_err(link, fmt, ...) \ 1499 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__) 1500 #define ata_link_warn(link, fmt, ...) \ 1501 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__) 1502 #define ata_link_notice(link, fmt, ...) \ 1503 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__) 1504 #define ata_link_info(link, fmt, ...) \ 1505 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__) 1506 #define ata_link_dbg(link, fmt, ...) \ 1507 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__) 1508 1509 #define ata_dev_err(dev, fmt, ...) \ 1510 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__) 1511 #define ata_dev_warn(dev, fmt, ...) \ 1512 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__) 1513 #define ata_dev_notice(dev, fmt, ...) \ 1514 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__) 1515 #define ata_dev_info(dev, fmt, ...) \ 1516 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__) 1517 #define ata_dev_dbg(dev, fmt, ...) \ 1518 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__) 1519 1520 void ata_print_version(const struct device *dev, const char *version); 1521 1522 /* 1523 * ata_eh_info helpers 1524 */ 1525 extern __printf(2, 3) 1526 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1527 extern __printf(2, 3) 1528 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 1529 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 1530 1531 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 1532 { 1533 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 1534 ehi->flags |= ATA_EHI_HOTPLUGGED; 1535 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK; 1536 ehi->err_mask |= AC_ERR_ATA_BUS; 1537 } 1538 1539 /* 1540 * port description helpers 1541 */ 1542 extern __printf(2, 3) 1543 void ata_port_desc(struct ata_port *ap, const char *fmt, ...); 1544 #ifdef CONFIG_PCI 1545 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 1546 const char *name); 1547 #endif 1548 1549 static inline bool ata_tag_internal(unsigned int tag) 1550 { 1551 return tag == ATA_TAG_INTERNAL; 1552 } 1553 1554 static inline bool ata_tag_valid(unsigned int tag) 1555 { 1556 return tag < ATA_MAX_QUEUE || ata_tag_internal(tag); 1557 } 1558 1559 #define __ata_qc_for_each(ap, qc, tag, max_tag, fn) \ 1560 for ((tag) = 0; (tag) < (max_tag) && \ 1561 ({ qc = fn((ap), (tag)); 1; }); (tag)++) \ 1562 1563 /* 1564 * Internal use only, iterate commands ignoring error handling and 1565 * status of 'qc'. 1566 */ 1567 #define ata_qc_for_each_raw(ap, qc, tag) \ 1568 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, __ata_qc_from_tag) 1569 1570 /* 1571 * Iterate all potential commands that can be queued 1572 */ 1573 #define ata_qc_for_each(ap, qc, tag) \ 1574 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, ata_qc_from_tag) 1575 1576 /* 1577 * Like ata_qc_for_each, but with the internal tag included 1578 */ 1579 #define ata_qc_for_each_with_internal(ap, qc, tag) \ 1580 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE + 1, ata_qc_from_tag) 1581 1582 /* 1583 * device helpers 1584 */ 1585 static inline unsigned int ata_class_enabled(unsigned int class) 1586 { 1587 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1588 class == ATA_DEV_PMP || class == ATA_DEV_SEMB || 1589 class == ATA_DEV_ZAC; 1590 } 1591 1592 static inline unsigned int ata_class_disabled(unsigned int class) 1593 { 1594 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1595 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP || 1596 class == ATA_DEV_ZAC_UNSUP; 1597 } 1598 1599 static inline unsigned int ata_class_absent(unsigned int class) 1600 { 1601 return !ata_class_enabled(class) && !ata_class_disabled(class); 1602 } 1603 1604 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1605 { 1606 return ata_class_enabled(dev->class); 1607 } 1608 1609 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1610 { 1611 return ata_class_disabled(dev->class); 1612 } 1613 1614 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1615 { 1616 return ata_class_absent(dev->class); 1617 } 1618 1619 /* 1620 * link helpers 1621 */ 1622 static inline int ata_link_max_devices(const struct ata_link *link) 1623 { 1624 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1625 return 2; 1626 return 1; 1627 } 1628 1629 static inline int ata_link_active(struct ata_link *link) 1630 { 1631 return ata_tag_valid(link->active_tag) || link->sactive; 1632 } 1633 1634 /* 1635 * Iterators 1636 * 1637 * ATA_LITER_* constants are used to select link iteration mode and 1638 * ATA_DITER_* device iteration mode. 1639 * 1640 * For a custom iteration directly using ata_{link|dev}_next(), if 1641 * @link or @dev, respectively, is NULL, the first element is 1642 * returned. @dev and @link can be any valid device or link and the 1643 * next element according to the iteration mode will be returned. 1644 * After the last element, NULL is returned. 1645 */ 1646 enum ata_link_iter_mode { 1647 ATA_LITER_EDGE, /* if present, PMP links only; otherwise, 1648 * host link. no slave link */ 1649 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ 1650 ATA_LITER_PMP_FIRST, /* PMP links followed by host link, 1651 * slave link still comes after host link */ 1652 }; 1653 1654 enum ata_dev_iter_mode { 1655 ATA_DITER_ENABLED, 1656 ATA_DITER_ENABLED_REVERSE, 1657 ATA_DITER_ALL, 1658 ATA_DITER_ALL_REVERSE, 1659 }; 1660 1661 extern struct ata_link *ata_link_next(struct ata_link *link, 1662 struct ata_port *ap, 1663 enum ata_link_iter_mode mode); 1664 1665 extern struct ata_device *ata_dev_next(struct ata_device *dev, 1666 struct ata_link *link, 1667 enum ata_dev_iter_mode mode); 1668 1669 /* 1670 * Shortcut notation for iterations 1671 * 1672 * ata_for_each_link() iterates over each link of @ap according to 1673 * @mode. @link points to the current link in the loop. @link is 1674 * NULL after loop termination. ata_for_each_dev() works the same way 1675 * except that it iterates over each device of @link. 1676 * 1677 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be 1678 * specified when using the following shorthand notations. Only the 1679 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be 1680 * specified. This not only increases brevity but also makes it 1681 * impossible to use ATA_LITER_* for device iteration or vice-versa. 1682 */ 1683 #define ata_for_each_link(link, ap, mode) \ 1684 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ 1685 (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) 1686 1687 #define ata_for_each_dev(dev, link, mode) \ 1688 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ 1689 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) 1690 1691 /** 1692 * ata_ncq_enabled - Test whether NCQ is enabled 1693 * @dev: ATA device to test for 1694 * 1695 * LOCKING: 1696 * spin_lock_irqsave(host lock) 1697 * 1698 * RETURNS: 1699 * 1 if NCQ is enabled for @dev, 0 otherwise. 1700 */ 1701 static inline int ata_ncq_enabled(struct ata_device *dev) 1702 { 1703 if (!IS_ENABLED(CONFIG_SATA_HOST)) 1704 return 0; 1705 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1706 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1707 } 1708 1709 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev) 1710 { 1711 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) && 1712 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] & 1713 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM); 1714 } 1715 1716 static inline bool ata_fpdma_read_log_supported(struct ata_device *dev) 1717 { 1718 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) && 1719 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET] & 1720 ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED); 1721 } 1722 1723 static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev) 1724 { 1725 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) && 1726 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] & 1727 ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED); 1728 } 1729 1730 static inline bool ata_fpdma_zac_mgmt_out_supported(struct ata_device *dev) 1731 { 1732 return (dev->ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OFFSET] & 1733 ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OUT); 1734 } 1735 1736 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1737 { 1738 qc->tf.ctl |= ATA_NIEN; 1739 } 1740 1741 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1742 unsigned int tag) 1743 { 1744 if (ata_tag_valid(tag)) 1745 return &ap->qcmd[tag]; 1746 return NULL; 1747 } 1748 1749 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1750 unsigned int tag) 1751 { 1752 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1753 1754 if (unlikely(!qc) || !ap->ops->error_handler) 1755 return qc; 1756 1757 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1758 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1759 return qc; 1760 1761 return NULL; 1762 } 1763 1764 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc) 1765 { 1766 return qc->nbytes - min(qc->extrabytes, qc->nbytes); 1767 } 1768 1769 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1770 { 1771 memset(tf, 0, sizeof(*tf)); 1772 1773 #ifdef CONFIG_ATA_SFF 1774 tf->ctl = dev->link->ap->ctl; 1775 #else 1776 tf->ctl = ATA_DEVCTL_OBS; 1777 #endif 1778 if (dev->devno == 0) 1779 tf->device = ATA_DEVICE_OBS; 1780 else 1781 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1782 } 1783 1784 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1785 { 1786 qc->dma_dir = DMA_NONE; 1787 qc->sg = NULL; 1788 qc->flags = 0; 1789 qc->cursg = NULL; 1790 qc->cursg_ofs = 0; 1791 qc->nbytes = qc->extrabytes = qc->curbytes = 0; 1792 qc->n_elem = 0; 1793 qc->err_mask = 0; 1794 qc->sect_size = ATA_SECT_SIZE; 1795 1796 ata_tf_init(qc->dev, &qc->tf); 1797 1798 /* init result_tf such that it indicates normal completion */ 1799 qc->result_tf.command = ATA_DRDY; 1800 qc->result_tf.feature = 0; 1801 } 1802 1803 static inline int ata_try_flush_cache(const struct ata_device *dev) 1804 { 1805 return ata_id_wcache_enabled(dev->id) || 1806 ata_id_has_flush(dev->id) || 1807 ata_id_has_flush_ext(dev->id); 1808 } 1809 1810 static inline unsigned int ac_err_mask(u8 status) 1811 { 1812 if (status & (ATA_BUSY | ATA_DRQ)) 1813 return AC_ERR_HSM; 1814 if (status & (ATA_ERR | ATA_DF)) 1815 return AC_ERR_DEV; 1816 return 0; 1817 } 1818 1819 static inline unsigned int __ac_err_mask(u8 status) 1820 { 1821 unsigned int mask = ac_err_mask(status); 1822 if (mask == 0) 1823 return AC_ERR_OTHER; 1824 return mask; 1825 } 1826 1827 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1828 { 1829 return *(struct ata_port **)&host->hostdata[0]; 1830 } 1831 1832 static inline int ata_check_ready(u8 status) 1833 { 1834 if (!(status & ATA_BUSY)) 1835 return 1; 1836 1837 /* 0xff indicates either no device or device not ready */ 1838 if (status == 0xff) 1839 return -ENODEV; 1840 1841 return 0; 1842 } 1843 1844 static inline unsigned long ata_deadline(unsigned long from_jiffies, 1845 unsigned long timeout_msecs) 1846 { 1847 return from_jiffies + msecs_to_jiffies(timeout_msecs); 1848 } 1849 1850 /* Don't open code these in drivers as there are traps. Firstly the range may 1851 change in future hardware and specs, secondly 0xFF means 'no DMA' but is 1852 > UDMA_0. Dyma ddreigiau */ 1853 1854 static inline int ata_using_mwdma(struct ata_device *adev) 1855 { 1856 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) 1857 return 1; 1858 return 0; 1859 } 1860 1861 static inline int ata_using_udma(struct ata_device *adev) 1862 { 1863 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) 1864 return 1; 1865 return 0; 1866 } 1867 1868 static inline int ata_dma_enabled(struct ata_device *adev) 1869 { 1870 return (adev->dma_mode == 0xFF ? 0 : 1); 1871 } 1872 1873 /************************************************************************** 1874 * PATA timings - drivers/ata/libata-pata-timings.c 1875 */ 1876 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode); 1877 extern int ata_timing_compute(struct ata_device *, unsigned short, 1878 struct ata_timing *, int, int); 1879 extern void ata_timing_merge(const struct ata_timing *, 1880 const struct ata_timing *, struct ata_timing *, 1881 unsigned int); 1882 1883 /************************************************************************** 1884 * PMP - drivers/ata/libata-pmp.c 1885 */ 1886 #ifdef CONFIG_SATA_PMP 1887 1888 extern const struct ata_port_operations sata_pmp_port_ops; 1889 1890 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc); 1891 extern void sata_pmp_error_handler(struct ata_port *ap); 1892 1893 #else /* CONFIG_SATA_PMP */ 1894 1895 #define sata_pmp_port_ops sata_port_ops 1896 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer 1897 #define sata_pmp_error_handler ata_std_error_handler 1898 1899 #endif /* CONFIG_SATA_PMP */ 1900 1901 1902 /************************************************************************** 1903 * SFF - drivers/ata/libata-sff.c 1904 */ 1905 #ifdef CONFIG_ATA_SFF 1906 1907 extern const struct ata_port_operations ata_sff_port_ops; 1908 extern const struct ata_port_operations ata_bmdma32_port_ops; 1909 1910 /* PIO only, sg_tablesize and dma_boundary limits can be removed */ 1911 #define ATA_PIO_SHT(drv_name) \ 1912 ATA_BASE_SHT(drv_name), \ 1913 .sg_tablesize = LIBATA_MAX_PRD, \ 1914 .dma_boundary = ATA_DMA_BOUNDARY 1915 1916 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); 1917 extern u8 ata_sff_check_status(struct ata_port *ap); 1918 extern void ata_sff_pause(struct ata_port *ap); 1919 extern void ata_sff_dma_pause(struct ata_port *ap); 1920 extern int ata_sff_busy_sleep(struct ata_port *ap, 1921 unsigned long timeout_pat, unsigned long timeout); 1922 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline); 1923 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 1924 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 1925 extern void ata_sff_exec_command(struct ata_port *ap, 1926 const struct ata_taskfile *tf); 1927 extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc, 1928 unsigned char *buf, unsigned int buflen, int rw); 1929 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc, 1930 unsigned char *buf, unsigned int buflen, int rw); 1931 extern void ata_sff_irq_on(struct ata_port *ap); 1932 extern void ata_sff_irq_clear(struct ata_port *ap); 1933 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 1934 u8 status, int in_wq); 1935 extern void ata_sff_queue_work(struct work_struct *work); 1936 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork, 1937 unsigned long delay); 1938 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay); 1939 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc); 1940 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc); 1941 extern unsigned int ata_sff_port_intr(struct ata_port *ap, 1942 struct ata_queued_cmd *qc); 1943 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance); 1944 extern void ata_sff_lost_interrupt(struct ata_port *ap); 1945 extern void ata_sff_freeze(struct ata_port *ap); 1946 extern void ata_sff_thaw(struct ata_port *ap); 1947 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline); 1948 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, 1949 u8 *r_err); 1950 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, 1951 unsigned long deadline); 1952 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes, 1953 unsigned long deadline); 1954 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class, 1955 unsigned long deadline); 1956 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes); 1957 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc); 1958 extern void ata_sff_error_handler(struct ata_port *ap); 1959 extern void ata_sff_std_ports(struct ata_ioports *ioaddr); 1960 #ifdef CONFIG_PCI 1961 extern int ata_pci_sff_init_host(struct ata_host *host); 1962 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev, 1963 const struct ata_port_info * const * ppi, 1964 struct ata_host **r_host); 1965 extern int ata_pci_sff_activate_host(struct ata_host *host, 1966 irq_handler_t irq_handler, 1967 struct scsi_host_template *sht); 1968 extern int ata_pci_sff_init_one(struct pci_dev *pdev, 1969 const struct ata_port_info * const * ppi, 1970 struct scsi_host_template *sht, void *host_priv, int hflags); 1971 #endif /* CONFIG_PCI */ 1972 1973 #ifdef CONFIG_ATA_BMDMA 1974 1975 extern const struct ata_port_operations ata_bmdma_port_ops; 1976 1977 #define ATA_BMDMA_SHT(drv_name) \ 1978 ATA_BASE_SHT(drv_name), \ 1979 .sg_tablesize = LIBATA_MAX_PRD, \ 1980 .dma_boundary = ATA_DMA_BOUNDARY 1981 1982 extern enum ata_completion_errors ata_bmdma_qc_prep(struct ata_queued_cmd *qc); 1983 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc); 1984 extern enum ata_completion_errors ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc); 1985 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap, 1986 struct ata_queued_cmd *qc); 1987 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance); 1988 extern void ata_bmdma_error_handler(struct ata_port *ap); 1989 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 1990 extern void ata_bmdma_irq_clear(struct ata_port *ap); 1991 extern void ata_bmdma_setup(struct ata_queued_cmd *qc); 1992 extern void ata_bmdma_start(struct ata_queued_cmd *qc); 1993 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 1994 extern u8 ata_bmdma_status(struct ata_port *ap); 1995 extern int ata_bmdma_port_start(struct ata_port *ap); 1996 extern int ata_bmdma_port_start32(struct ata_port *ap); 1997 1998 #ifdef CONFIG_PCI 1999 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev); 2000 extern void ata_pci_bmdma_init(struct ata_host *host); 2001 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev, 2002 const struct ata_port_info * const * ppi, 2003 struct ata_host **r_host); 2004 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev, 2005 const struct ata_port_info * const * ppi, 2006 struct scsi_host_template *sht, 2007 void *host_priv, int hflags); 2008 #endif /* CONFIG_PCI */ 2009 #endif /* CONFIG_ATA_BMDMA */ 2010 2011 /** 2012 * ata_sff_busy_wait - Wait for a port status register 2013 * @ap: Port to wait for. 2014 * @bits: bits that must be clear 2015 * @max: number of 10uS waits to perform 2016 * 2017 * Waits up to max*10 microseconds for the selected bits in the port's 2018 * status register to be cleared. 2019 * Returns final value of status register. 2020 * 2021 * LOCKING: 2022 * Inherited from caller. 2023 */ 2024 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits, 2025 unsigned int max) 2026 { 2027 u8 status; 2028 2029 do { 2030 udelay(10); 2031 status = ap->ops->sff_check_status(ap); 2032 max--; 2033 } while (status != 0xff && (status & bits) && (max > 0)); 2034 2035 return status; 2036 } 2037 2038 /** 2039 * ata_wait_idle - Wait for a port to be idle. 2040 * @ap: Port to wait for. 2041 * 2042 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 2043 * Returns final value of status register. 2044 * 2045 * LOCKING: 2046 * Inherited from caller. 2047 */ 2048 static inline u8 ata_wait_idle(struct ata_port *ap) 2049 { 2050 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 2051 2052 #ifdef ATA_DEBUG 2053 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 2054 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 2055 status); 2056 #endif 2057 2058 return status; 2059 } 2060 #endif /* CONFIG_ATA_SFF */ 2061 2062 #endif /* __LINUX_LIBATA_H__ */ 2063