libata.h revision e0a7175263db4a226558883a51a88a5d2bc5d9fe
1/* 2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved. 3 * Copyright 2003-2005 Jeff Garzik 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2, or (at your option) 9 * any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; see the file COPYING. If not, write to 18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 19 * 20 * 21 * libata documentation is available via 'make {ps|pdf}docs', 22 * as Documentation/DocBook/libata.* 23 * 24 */ 25 26#ifndef __LINUX_LIBATA_H__ 27#define __LINUX_LIBATA_H__ 28 29#include <linux/delay.h> 30#include <linux/interrupt.h> 31#include <linux/pci.h> 32#include <linux/dma-mapping.h> 33#include <asm/scatterlist.h> 34#include <linux/io.h> 35#include <linux/ata.h> 36#include <linux/workqueue.h> 37#include <scsi/scsi_host.h> 38#include <linux/acpi.h> 39 40/* 41 * Define if arch has non-standard setup. This is a _PCI_ standard 42 * not a legacy or ISA standard. 43 */ 44#ifdef CONFIG_ATA_NONSTANDARD 45#include <asm/libata-portmap.h> 46#else 47#include <asm-generic/libata-portmap.h> 48#endif 49 50/* 51 * compile-time options: to be removed as soon as all the drivers are 52 * converted to the new debugging mechanism 53 */ 54#undef ATA_DEBUG /* debugging output */ 55#undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 56#undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 57#undef ATA_NDEBUG /* define to disable quick runtime checks */ 58 59 60/* note: prints function name for you */ 61#ifdef ATA_DEBUG 62#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 63#ifdef ATA_VERBOSE_DEBUG 64#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 65#else 66#define VPRINTK(fmt, args...) 67#endif /* ATA_VERBOSE_DEBUG */ 68#else 69#define DPRINTK(fmt, args...) 70#define VPRINTK(fmt, args...) 71#endif /* ATA_DEBUG */ 72 73#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 74 75/* NEW: debug levels */ 76#define HAVE_LIBATA_MSG 1 77 78enum { 79 ATA_MSG_DRV = 0x0001, 80 ATA_MSG_INFO = 0x0002, 81 ATA_MSG_PROBE = 0x0004, 82 ATA_MSG_WARN = 0x0008, 83 ATA_MSG_MALLOC = 0x0010, 84 ATA_MSG_CTL = 0x0020, 85 ATA_MSG_INTR = 0x0040, 86 ATA_MSG_ERR = 0x0080, 87}; 88 89#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 90#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 91#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 92#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 93#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 94#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 95#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 96#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 97 98static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 99{ 100 if (dval < 0 || dval >= (sizeof(u32) * 8)) 101 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 102 if (!dval) 103 return 0; 104 return (1 << dval) - 1; 105} 106 107/* defines only for the constants which don't work well as enums */ 108#define ATA_TAG_POISON 0xfafbfcfdU 109 110/* move to PCI layer? */ 111static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) 112{ 113 return &pdev->dev; 114} 115 116enum { 117 /* various global constants */ 118 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 119 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ 120 ATA_MAX_PORTS = 8, 121 ATA_DEF_QUEUE = 1, 122 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 123 ATA_MAX_QUEUE = 32, 124 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 125 ATA_MAX_BUS = 2, 126 ATA_DEF_BUSY_WAIT = 10000, 127 ATA_SHORT_PAUSE = (HZ >> 6) + 1, 128 129 ATA_SHT_EMULATED = 1, 130 ATA_SHT_CMD_PER_LUN = 1, 131 ATA_SHT_THIS_ID = -1, 132 ATA_SHT_USE_CLUSTERING = 1, 133 134 /* struct ata_device stuff */ 135 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 136 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 137 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 138 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 139 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 140 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 141 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 142 ATA_DFLAG_AN = (1 << 7), /* device supports AN */ 143 ATA_DFLAG_CFG_MASK = (1 << 12) - 1, 144 145 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */ 146 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */ 147 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */ 148 ATA_DFLAG_INIT_MASK = (1 << 16) - 1, 149 150 ATA_DFLAG_DETACH = (1 << 16), 151 ATA_DFLAG_DETACHED = (1 << 17), 152 153 ATA_DEV_UNKNOWN = 0, /* unknown device */ 154 ATA_DEV_ATA = 1, /* ATA device */ 155 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 156 ATA_DEV_ATAPI = 3, /* ATAPI device */ 157 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 158 ATA_DEV_PMP = 5, /* SATA port multiplier */ 159 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ 160 ATA_DEV_SEMB = 7, /* SEMB */ 161 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ 162 ATA_DEV_NONE = 9, /* no device */ 163 164 /* struct ata_link flags */ 165 ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */ 166 ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H 167 * Register FIS clearing BSY */ 168 169 /* struct ata_port flags */ 170 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 171 /* (doesn't imply presence) */ 172 ATA_FLAG_SATA = (1 << 1), 173 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 174 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 175 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 176 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 177 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 178 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 179 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 180 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 181 * doesn't handle PIO interrupts */ 182 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 183 ATA_FLAG_DEBUGMSG = (1 << 13), 184 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 185 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 186 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 187 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 188 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 189 190 /* The following flag belongs to ap->pflags but is kept in 191 * ap->flags because it's referenced in many LLDs and will be 192 * removed in not-too-distant future. 193 */ 194 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 195 196 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 197 198 /* struct ata_port pflags */ 199 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 200 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 201 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 202 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 203 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 204 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 205 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 206 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 207 208 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 209 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 210 ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */ 211 212 /* struct ata_queued_cmd flags */ 213 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 214 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 215 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 216 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 217 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 218 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 219 220 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 221 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 222 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 223 224 /* host set flags */ 225 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 226 ATA_HOST_STARTED = (1 << 1), /* Host started */ 227 228 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 229 230 /* various lengths of time */ 231 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 232 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 233 ATA_TMOUT_INTERNAL = 30 * HZ, 234 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 235 236 /* ATA bus states */ 237 BUS_UNKNOWN = 0, 238 BUS_DMA = 1, 239 BUS_IDLE = 2, 240 BUS_NOINTR = 3, 241 BUS_NODATA = 4, 242 BUS_TIMER = 5, 243 BUS_PIO = 6, 244 BUS_EDD = 7, 245 BUS_IDENTIFY = 8, 246 BUS_PACKET = 9, 247 248 /* SATA port states */ 249 PORT_UNKNOWN = 0, 250 PORT_ENABLED = 1, 251 PORT_DISABLED = 2, 252 253 /* encoding various smaller bitmaps into a single 254 * unsigned int bitmap 255 */ 256 ATA_BITS_PIO = 7, 257 ATA_BITS_MWDMA = 5, 258 ATA_BITS_UDMA = 8, 259 260 ATA_SHIFT_PIO = 0, 261 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, 262 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, 263 264 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, 265 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, 266 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, 267 268 /* size of buffer to pad xfers ending on unaligned boundaries */ 269 ATA_DMA_PAD_SZ = 4, 270 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 271 272 /* ering size */ 273 ATA_ERING_SIZE = 32, 274 275 /* desc_len for ata_eh_info and context */ 276 ATA_EH_DESC_LEN = 80, 277 278 /* reset / recovery action types */ 279 ATA_EH_REVALIDATE = (1 << 0), 280 ATA_EH_SOFTRESET = (1 << 1), 281 ATA_EH_HARDRESET = (1 << 2), 282 283 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 284 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, 285 286 /* ata_eh_info->flags */ 287 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 288 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ 289 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 290 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 291 292 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 293 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 294 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 295 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 296 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 297 298 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 299 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, 300 301 /* max tries if error condition is still set after ->error_handler */ 302 ATA_EH_MAX_TRIES = 5, 303 304 /* how hard are we gonna try to probe/recover devices */ 305 ATA_PROBE_MAX_TRIES = 3, 306 ATA_EH_DEV_TRIES = 3, 307 ATA_EH_PMP_TRIES = 5, 308 ATA_EH_PMP_LINK_TRIES = 3, 309 310 SATA_PMP_SCR_TIMEOUT = 250, 311 312 /* Horkage types. May be set by libata or controller on drives 313 (some horkage may be drive/controller pair dependant */ 314 315 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 316 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 317 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 318 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 319 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 320}; 321 322enum hsm_task_states { 323 HSM_ST_IDLE, /* no command on going */ 324 HSM_ST_FIRST, /* (waiting the device to) 325 write CDB or first data block */ 326 HSM_ST, /* (waiting the device to) transfer data */ 327 HSM_ST_LAST, /* (waiting the device to) complete command */ 328 HSM_ST_ERR, /* error */ 329}; 330 331enum ata_completion_errors { 332 AC_ERR_DEV = (1 << 0), /* device reported error */ 333 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 334 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 335 AC_ERR_MEDIA = (1 << 3), /* media error */ 336 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 337 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 338 AC_ERR_SYSTEM = (1 << 6), /* system error */ 339 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 340 AC_ERR_OTHER = (1 << 8), /* unknown */ 341 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 342 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 343}; 344 345/* forward declarations */ 346struct scsi_device; 347struct ata_port_operations; 348struct ata_port; 349struct ata_link; 350struct ata_queued_cmd; 351 352/* typedefs */ 353typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 354typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 355typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 356 unsigned long deadline); 357typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 358 359struct ata_ioports { 360 void __iomem *cmd_addr; 361 void __iomem *data_addr; 362 void __iomem *error_addr; 363 void __iomem *feature_addr; 364 void __iomem *nsect_addr; 365 void __iomem *lbal_addr; 366 void __iomem *lbam_addr; 367 void __iomem *lbah_addr; 368 void __iomem *device_addr; 369 void __iomem *status_addr; 370 void __iomem *command_addr; 371 void __iomem *altstatus_addr; 372 void __iomem *ctl_addr; 373 void __iomem *bmdma_addr; 374 void __iomem *scr_addr; 375}; 376 377struct ata_host { 378 spinlock_t lock; 379 struct device *dev; 380 void __iomem * const *iomap; 381 unsigned int n_ports; 382 void *private_data; 383 const struct ata_port_operations *ops; 384 unsigned long flags; 385#ifdef CONFIG_ATA_ACPI 386 acpi_handle acpi_handle; 387#endif 388 struct ata_port *simplex_claimed; /* channel owning the DMA */ 389 struct ata_port *ports[0]; 390}; 391 392struct ata_queued_cmd { 393 struct ata_port *ap; 394 struct ata_device *dev; 395 396 struct scsi_cmnd *scsicmd; 397 void (*scsidone)(struct scsi_cmnd *); 398 399 struct ata_taskfile tf; 400 u8 cdb[ATAPI_CDB_LEN]; 401 402 unsigned long flags; /* ATA_QCFLAG_xxx */ 403 unsigned int tag; 404 unsigned int n_elem; 405 unsigned int orig_n_elem; 406 407 int dma_dir; 408 409 unsigned int pad_len; 410 unsigned int sect_size; 411 412 unsigned int nbytes; 413 unsigned int curbytes; 414 415 unsigned int cursg; 416 unsigned int cursg_ofs; 417 418 struct scatterlist sgent; 419 struct scatterlist pad_sgent; 420 void *buf_virt; 421 422 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 423 struct scatterlist *__sg; 424 425 unsigned int err_mask; 426 struct ata_taskfile result_tf; 427 ata_qc_cb_t complete_fn; 428 429 void *private_data; 430 void *lldd_task; 431}; 432 433struct ata_port_stats { 434 unsigned long unhandled_irq; 435 unsigned long idle_irq; 436 unsigned long rw_reqbuf; 437}; 438 439struct ata_ering_entry { 440 int is_io; 441 unsigned int err_mask; 442 u64 timestamp; 443}; 444 445struct ata_ering { 446 int cursor; 447 struct ata_ering_entry ring[ATA_ERING_SIZE]; 448}; 449 450struct ata_device { 451 struct ata_link *link; 452 unsigned int devno; /* 0 or 1 */ 453 unsigned long flags; /* ATA_DFLAG_xxx */ 454 unsigned int horkage; /* List of broken features */ 455 struct scsi_device *sdev; /* attached SCSI device */ 456#ifdef CONFIG_ATA_ACPI 457 acpi_handle acpi_handle; 458#endif 459 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 460 u64 n_sectors; /* size of device, if ATA */ 461 unsigned int class; /* ATA_DEV_xxx */ 462 463 union { 464 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 465 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */ 466 }; 467 468 u8 pio_mode; 469 u8 dma_mode; 470 u8 xfer_mode; 471 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 472 473 unsigned int multi_count; /* sectors count for 474 READ/WRITE MULTIPLE */ 475 unsigned int max_sectors; /* per-device max sectors */ 476 unsigned int cdb_len; 477 478 /* per-dev xfer mask */ 479 unsigned int pio_mask; 480 unsigned int mwdma_mask; 481 unsigned int udma_mask; 482 483 /* for CHS addressing */ 484 u16 cylinders; /* Number of cylinders */ 485 u16 heads; /* Number of heads */ 486 u16 sectors; /* Number of sectors per track */ 487 488 /* error history */ 489 struct ata_ering ering; 490 int spdn_cnt; 491}; 492 493/* Offset into struct ata_device. Fields above it are maintained 494 * acress device init. Fields below are zeroed. 495 */ 496#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 497 498struct ata_eh_info { 499 struct ata_device *dev; /* offending device */ 500 u32 serror; /* SError from LLDD */ 501 unsigned int err_mask; /* port-wide err_mask */ 502 unsigned int action; /* ATA_EH_* action mask */ 503 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 504 unsigned int flags; /* ATA_EHI_* flags */ 505 506 unsigned int probe_mask; 507 508 char desc[ATA_EH_DESC_LEN]; 509 int desc_len; 510}; 511 512struct ata_eh_context { 513 struct ata_eh_info i; 514 int tries[ATA_MAX_DEVICES]; 515 unsigned int classes[ATA_MAX_DEVICES]; 516 unsigned int did_probe_mask; 517}; 518 519struct ata_acpi_drive 520{ 521 u32 pio; 522 u32 dma; 523} __packed; 524 525struct ata_acpi_gtm { 526 struct ata_acpi_drive drive[2]; 527 u32 flags; 528} __packed; 529 530struct ata_link { 531 struct ata_port *ap; 532 int pmp; /* port multiplier port # */ 533 534 unsigned int active_tag; /* active tag on this link */ 535 u32 sactive; /* active NCQ commands */ 536 537 unsigned int flags; /* ATA_LFLAG_xxx */ 538 539 unsigned int hw_sata_spd_limit; 540 unsigned int sata_spd_limit; 541 unsigned int sata_spd; /* current SATA PHY speed */ 542 543 /* record runtime error info, protected by host_set lock */ 544 struct ata_eh_info eh_info; 545 /* EH context */ 546 struct ata_eh_context eh_context; 547 548 struct ata_device device[ATA_MAX_DEVICES]; 549}; 550 551struct ata_port { 552 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 553 const struct ata_port_operations *ops; 554 spinlock_t *lock; 555 unsigned long flags; /* ATA_FLAG_xxx */ 556 unsigned int pflags; /* ATA_PFLAG_xxx */ 557 unsigned int print_id; /* user visible unique port ID */ 558 unsigned int port_no; /* 0 based port no. inside the host */ 559 560 struct ata_prd *prd; /* our SG list */ 561 dma_addr_t prd_dma; /* and its DMA mapping */ 562 563 void *pad; /* array of DMA pad buffers */ 564 dma_addr_t pad_dma; 565 566 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 567 568 u8 ctl; /* cache of ATA control register */ 569 u8 last_ctl; /* Cache last written value */ 570 unsigned int pio_mask; 571 unsigned int mwdma_mask; 572 unsigned int udma_mask; 573 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 574 575 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 576 unsigned long qc_allocated; 577 unsigned int qc_active; 578 579 struct ata_link link; /* host default link */ 580 581 int nr_pmp_links; /* nr of available PMP links */ 582 struct ata_link *pmp_link; /* array of PMP links */ 583 584 struct ata_port_stats stats; 585 struct ata_host *host; 586 struct device *dev; 587 588 void *port_task_data; 589 struct delayed_work port_task; 590 struct delayed_work hotplug_task; 591 struct work_struct scsi_rescan_task; 592 593 unsigned int hsm_task_state; 594 595 u32 msg_enable; 596 struct list_head eh_done_q; 597 wait_queue_head_t eh_wait_q; 598 int eh_tries; 599 600 pm_message_t pm_mesg; 601 int *pm_result; 602 603 struct timer_list fastdrain_timer; 604 unsigned long fastdrain_cnt; 605 606 void *private_data; 607 608#ifdef CONFIG_ATA_ACPI 609 acpi_handle acpi_handle; 610 struct ata_acpi_gtm acpi_gtm; 611#endif 612 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 613}; 614 615struct ata_port_operations { 616 void (*dev_config) (struct ata_device *); 617 618 void (*set_piomode) (struct ata_port *, struct ata_device *); 619 void (*set_dmamode) (struct ata_port *, struct ata_device *); 620 unsigned long (*mode_filter) (struct ata_device *, unsigned long); 621 622 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 623 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 624 625 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 626 u8 (*check_status)(struct ata_port *ap); 627 u8 (*check_altstatus)(struct ata_port *ap); 628 void (*dev_select)(struct ata_port *ap, unsigned int device); 629 630 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 631 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev); 632 633 int (*cable_detect) (struct ata_port *ap); 634 635 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 636 637 void (*bmdma_setup) (struct ata_queued_cmd *qc); 638 void (*bmdma_start) (struct ata_queued_cmd *qc); 639 640 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 641 642 void (*qc_prep) (struct ata_queued_cmd *qc); 643 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 644 645 /* port multiplier */ 646 void (*pmp_attach) (struct ata_port *ap); 647 void (*pmp_detach) (struct ata_port *ap); 648 int (*pmp_read) (struct ata_device *dev, int pmp, int reg, u32 *r_val); 649 int (*pmp_write) (struct ata_device *dev, int pmp, int reg, u32 val); 650 651 /* Error handlers. ->error_handler overrides ->eng_timeout and 652 * indicates that new-style EH is in place. 653 */ 654 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 655 656 void (*freeze) (struct ata_port *ap); 657 void (*thaw) (struct ata_port *ap); 658 void (*error_handler) (struct ata_port *ap); 659 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 660 661 irq_handler_t irq_handler; 662 void (*irq_clear) (struct ata_port *); 663 u8 (*irq_on) (struct ata_port *); 664 665 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val); 666 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val); 667 668 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 669 int (*port_resume) (struct ata_port *ap); 670 671 int (*port_start) (struct ata_port *ap); 672 void (*port_stop) (struct ata_port *ap); 673 674 void (*host_stop) (struct ata_host *host); 675 676 void (*bmdma_stop) (struct ata_queued_cmd *qc); 677 u8 (*bmdma_status) (struct ata_port *ap); 678}; 679 680struct ata_port_info { 681 struct scsi_host_template *sht; 682 unsigned long flags; 683 unsigned long link_flags; 684 unsigned long pio_mask; 685 unsigned long mwdma_mask; 686 unsigned long udma_mask; 687 const struct ata_port_operations *port_ops; 688 irq_handler_t irq_handler; 689 void *private_data; 690}; 691 692struct ata_timing { 693 unsigned short mode; /* ATA mode */ 694 unsigned short setup; /* t1 */ 695 unsigned short act8b; /* t2 for 8-bit I/O */ 696 unsigned short rec8b; /* t2i for 8-bit I/O */ 697 unsigned short cyc8b; /* t0 for 8-bit I/O */ 698 unsigned short active; /* t2 or tD */ 699 unsigned short recover; /* t2i or tK */ 700 unsigned short cycle; /* t0 */ 701 unsigned short udma; /* t2CYCTYP/2 */ 702}; 703 704#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 705 706extern const unsigned long sata_deb_timing_normal[]; 707extern const unsigned long sata_deb_timing_hotplug[]; 708extern const unsigned long sata_deb_timing_long[]; 709 710extern const struct ata_port_operations ata_dummy_port_ops; 711extern const struct ata_port_info ata_dummy_port_info; 712 713static inline const unsigned long * 714sata_ehc_deb_timing(struct ata_eh_context *ehc) 715{ 716 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 717 return sata_deb_timing_hotplug; 718 else 719 return sata_deb_timing_normal; 720} 721 722static inline int ata_port_is_dummy(struct ata_port *ap) 723{ 724 return ap->ops == &ata_dummy_port_ops; 725} 726 727extern void sata_print_link_status(struct ata_link *link); 728extern void ata_port_probe(struct ata_port *); 729extern void __sata_phy_reset(struct ata_port *ap); 730extern void sata_phy_reset(struct ata_port *ap); 731extern void ata_bus_reset(struct ata_port *ap); 732extern int sata_set_spd(struct ata_link *link); 733extern int sata_link_debounce(struct ata_link *link, 734 const unsigned long *params, unsigned long deadline); 735extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 736 unsigned long deadline); 737extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 738extern int ata_std_softreset(struct ata_link *link, unsigned int *classes, 739 unsigned long deadline); 740extern int sata_link_hardreset(struct ata_link *link, 741 const unsigned long *timing, unsigned long deadline); 742extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 743 unsigned long deadline); 744extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 745extern void ata_port_disable(struct ata_port *); 746extern void ata_std_ports(struct ata_ioports *ioaddr); 747#ifdef CONFIG_PCI 748extern int ata_pci_init_one (struct pci_dev *pdev, 749 const struct ata_port_info * const * ppi); 750extern void ata_pci_remove_one (struct pci_dev *pdev); 751#ifdef CONFIG_PM 752extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 753extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 754extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 755extern int ata_pci_device_resume(struct pci_dev *pdev); 756#endif 757extern int ata_pci_clear_simplex(struct pci_dev *pdev); 758#endif /* CONFIG_PCI */ 759extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 760extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 761 const struct ata_port_info * const * ppi, int n_ports); 762extern int ata_host_start(struct ata_host *host); 763extern int ata_host_register(struct ata_host *host, 764 struct scsi_host_template *sht); 765extern int ata_host_activate(struct ata_host *host, int irq, 766 irq_handler_t irq_handler, unsigned long irq_flags, 767 struct scsi_host_template *sht); 768extern void ata_host_detach(struct ata_host *host); 769extern void ata_host_init(struct ata_host *, struct device *, 770 unsigned long, const struct ata_port_operations *); 771extern int ata_scsi_detect(struct scsi_host_template *sht); 772extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 773extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 774extern void ata_scsi_media_change_notify(struct ata_device *atadev); 775extern void ata_sas_port_destroy(struct ata_port *); 776extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 777 struct ata_port_info *, struct Scsi_Host *); 778extern int ata_sas_port_init(struct ata_port *); 779extern int ata_sas_port_start(struct ata_port *ap); 780extern void ata_sas_port_stop(struct ata_port *ap); 781extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 782extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 783 struct ata_port *ap); 784extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 785extern int sata_scr_valid(struct ata_link *link); 786extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 787extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 788extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 789extern int ata_link_online(struct ata_link *link); 790extern int ata_link_offline(struct ata_link *link); 791#ifdef CONFIG_PM 792extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 793extern void ata_host_resume(struct ata_host *host); 794#endif 795extern int ata_ratelimit(void); 796extern int ata_busy_sleep(struct ata_port *ap, 797 unsigned long timeout_pat, unsigned long timeout); 798extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline); 799extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 800 void *data, unsigned long delay); 801extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 802 unsigned long interval_msec, 803 unsigned long timeout_msec); 804extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present, 805 u8 *r_err); 806 807/* 808 * Default driver ops implementations 809 */ 810extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 811extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 812extern void ata_tf_to_fis(const struct ata_taskfile *tf, 813 u8 pmp, int is_cmd, u8 *fis); 814extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 815extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 816extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 817extern u8 ata_check_status(struct ata_port *ap); 818extern u8 ata_altstatus(struct ata_port *ap); 819extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 820extern int ata_port_start (struct ata_port *ap); 821extern int ata_sff_port_start (struct ata_port *ap); 822extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 823extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 824 unsigned int buflen, int write_data); 825extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 826 unsigned int buflen, int write_data); 827extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc); 828extern void ata_qc_prep(struct ata_queued_cmd *qc); 829extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 830extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 831extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 832 unsigned int buflen); 833extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 834 unsigned int n_elem); 835extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 836extern void ata_dev_disable(struct ata_device *adev); 837extern void ata_id_string(const u16 *id, unsigned char *s, 838 unsigned int ofs, unsigned int len); 839extern void ata_id_c_string(const u16 *id, unsigned char *s, 840 unsigned int ofs, unsigned int len); 841extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); 842extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 843extern void ata_bmdma_start (struct ata_queued_cmd *qc); 844extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 845extern u8 ata_bmdma_status(struct ata_port *ap); 846extern void ata_bmdma_irq_clear(struct ata_port *ap); 847extern void ata_bmdma_freeze(struct ata_port *ap); 848extern void ata_bmdma_thaw(struct ata_port *ap); 849extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 850 ata_reset_fn_t softreset, 851 ata_reset_fn_t hardreset, 852 ata_postreset_fn_t postreset); 853extern void ata_bmdma_error_handler(struct ata_port *ap); 854extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 855extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 856 u8 status, int in_wq); 857extern void ata_qc_complete(struct ata_queued_cmd *qc); 858extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 859 void (*finish_qc)(struct ata_queued_cmd *)); 860extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 861 void (*done)(struct scsi_cmnd *)); 862extern int ata_std_bios_param(struct scsi_device *sdev, 863 struct block_device *bdev, 864 sector_t capacity, int geom[]); 865extern int ata_scsi_slave_config(struct scsi_device *sdev); 866extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 867extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 868 int queue_depth); 869extern struct ata_device *ata_dev_pair(struct ata_device *adev); 870extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 871extern u8 ata_irq_on(struct ata_port *ap); 872 873extern int ata_cable_40wire(struct ata_port *ap); 874extern int ata_cable_80wire(struct ata_port *ap); 875extern int ata_cable_sata(struct ata_port *ap); 876extern int ata_cable_unknown(struct ata_port *ap); 877 878/* 879 * Timing helpers 880 */ 881 882extern unsigned int ata_pio_need_iordy(const struct ata_device *); 883extern int ata_timing_compute(struct ata_device *, unsigned short, 884 struct ata_timing *, int, int); 885extern void ata_timing_merge(const struct ata_timing *, 886 const struct ata_timing *, struct ata_timing *, 887 unsigned int); 888 889enum { 890 ATA_TIMING_SETUP = (1 << 0), 891 ATA_TIMING_ACT8B = (1 << 1), 892 ATA_TIMING_REC8B = (1 << 2), 893 ATA_TIMING_CYC8B = (1 << 3), 894 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 895 ATA_TIMING_CYC8B, 896 ATA_TIMING_ACTIVE = (1 << 4), 897 ATA_TIMING_RECOVER = (1 << 5), 898 ATA_TIMING_CYCLE = (1 << 6), 899 ATA_TIMING_UDMA = (1 << 7), 900 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 901 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 902 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 903 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 904}; 905 906/* libata-acpi.c */ 907#ifdef CONFIG_ATA_ACPI 908extern int ata_acpi_cbl_80wire(struct ata_port *ap); 909#else 910static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; } 911#endif 912 913#ifdef CONFIG_PCI 914struct pci_bits { 915 unsigned int reg; /* PCI config register to read */ 916 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 917 unsigned long mask; 918 unsigned long val; 919}; 920 921extern int ata_pci_init_sff_host(struct ata_host *host); 922extern int ata_pci_init_bmdma(struct ata_host *host); 923extern int ata_pci_prepare_sff_host(struct pci_dev *pdev, 924 const struct ata_port_info * const * ppi, 925 struct ata_host **r_host); 926extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 927extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); 928#endif /* CONFIG_PCI */ 929 930/* 931 * EH 932 */ 933extern void ata_eng_timeout(struct ata_port *ap); 934 935extern void ata_port_schedule_eh(struct ata_port *ap); 936extern int ata_link_abort(struct ata_link *link); 937extern int ata_port_abort(struct ata_port *ap); 938extern int ata_port_freeze(struct ata_port *ap); 939 940extern void ata_eh_freeze_port(struct ata_port *ap); 941extern void ata_eh_thaw_port(struct ata_port *ap); 942 943extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 944extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 945 946extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 947 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 948 ata_postreset_fn_t postreset); 949 950/* 951 * printk helpers 952 */ 953#define ata_port_printk(ap, lv, fmt, args...) \ 954 printk(lv"ata%u: "fmt, (ap)->print_id , ##args) 955 956#define ata_link_printk(link, lv, fmt, args...) do { \ 957 if ((link)->ap->nr_pmp_links) \ 958 printk(lv"ata%u.%02u: "fmt, (link)->ap->print_id, \ 959 (link)->pmp , ##args); \ 960 else \ 961 printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args); \ 962 } while(0) 963 964#define ata_dev_printk(dev, lv, fmt, args...) \ 965 printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, \ 966 (dev)->link->pmp + (dev)->devno , ##args) 967 968/* 969 * ata_eh_info helpers 970 */ 971extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 972 __attribute__ ((format (printf, 2, 3))); 973extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...) 974 __attribute__ ((format (printf, 2, 3))); 975extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 976 977static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi) 978{ 979 ehi->flags |= ATA_EHI_RESUME_LINK; 980 ehi->action |= ATA_EH_SOFTRESET; 981 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 982} 983 984static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 985{ 986 ata_ehi_schedule_probe(ehi); 987 ehi->flags |= ATA_EHI_HOTPLUGGED; 988 ehi->err_mask |= AC_ERR_ATA_BUS; 989} 990 991/* 992 * port description helpers 993 */ 994extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...) 995 __attribute__ ((format (printf, 2, 3))); 996#ifdef CONFIG_PCI 997extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset, 998 const char *name); 999#endif 1000 1001/* 1002 * qc helpers 1003 */ 1004static inline int 1005ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 1006{ 1007 if (sg == &qc->pad_sgent) 1008 return 1; 1009 if (qc->pad_len) 1010 return 0; 1011 if (((sg - qc->__sg) + 1) == qc->n_elem) 1012 return 1; 1013 return 0; 1014} 1015 1016static inline struct scatterlist * 1017ata_qc_first_sg(struct ata_queued_cmd *qc) 1018{ 1019 if (qc->n_elem) 1020 return qc->__sg; 1021 if (qc->pad_len) 1022 return &qc->pad_sgent; 1023 return NULL; 1024} 1025 1026static inline struct scatterlist * 1027ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 1028{ 1029 if (sg == &qc->pad_sgent) 1030 return NULL; 1031 if (++sg - qc->__sg < qc->n_elem) 1032 return sg; 1033 if (qc->pad_len) 1034 return &qc->pad_sgent; 1035 return NULL; 1036} 1037 1038#define ata_for_each_sg(sg, qc) \ 1039 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 1040 1041static inline unsigned int ata_tag_valid(unsigned int tag) 1042{ 1043 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1044} 1045 1046static inline unsigned int ata_tag_internal(unsigned int tag) 1047{ 1048 return tag == ATA_MAX_QUEUE - 1; 1049} 1050 1051/* 1052 * device helpers 1053 */ 1054static inline unsigned int ata_class_enabled(unsigned int class) 1055{ 1056 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || 1057 class == ATA_DEV_PMP || class == ATA_DEV_SEMB; 1058} 1059 1060static inline unsigned int ata_class_disabled(unsigned int class) 1061{ 1062 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP || 1063 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP; 1064} 1065 1066static inline unsigned int ata_class_absent(unsigned int class) 1067{ 1068 return !ata_class_enabled(class) && !ata_class_disabled(class); 1069} 1070 1071static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1072{ 1073 return ata_class_enabled(dev->class); 1074} 1075 1076static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1077{ 1078 return ata_class_disabled(dev->class); 1079} 1080 1081static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1082{ 1083 return ata_class_absent(dev->class); 1084} 1085 1086/* 1087 * link helpers 1088 */ 1089static inline int ata_is_host_link(const struct ata_link *link) 1090{ 1091 return link == &link->ap->link; 1092} 1093 1094static inline int ata_link_max_devices(const struct ata_link *link) 1095{ 1096 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1097 return 2; 1098 return 1; 1099} 1100 1101static inline struct ata_link *ata_port_first_link(struct ata_port *ap) 1102{ 1103 if (ap->nr_pmp_links) 1104 return ap->pmp_link; 1105 return &ap->link; 1106} 1107 1108static inline struct ata_link *ata_port_next_link(struct ata_link *link) 1109{ 1110 struct ata_port *ap = link->ap; 1111 1112 if (link == &ap->link) { 1113 if (!ap->nr_pmp_links) 1114 return NULL; 1115 return ap->pmp_link; 1116 } 1117 1118 if (++link - ap->pmp_link < ap->nr_pmp_links) 1119 return link; 1120 return NULL; 1121} 1122 1123#define __ata_port_for_each_link(lk, ap) \ 1124 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk)) 1125 1126#define ata_port_for_each_link(link, ap) \ 1127 for ((link) = ata_port_first_link(ap); (link); \ 1128 (link) = ata_port_next_link(link)) 1129 1130#define ata_link_for_each_dev(dev, link) \ 1131 for ((dev) = (link)->device; \ 1132 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \ 1133 (dev)++) 1134 1135#define ata_link_for_each_dev_reverse(dev, link) \ 1136 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \ 1137 (dev) >= (link)->device || ((dev) = NULL); (dev)--) 1138 1139static inline u8 ata_chk_status(struct ata_port *ap) 1140{ 1141 return ap->ops->check_status(ap); 1142} 1143 1144/** 1145 * ata_ncq_enabled - Test whether NCQ is enabled 1146 * @dev: ATA device to test for 1147 * 1148 * LOCKING: 1149 * spin_lock_irqsave(host lock) 1150 * 1151 * RETURNS: 1152 * 1 if NCQ is enabled for @dev, 0 otherwise. 1153 */ 1154static inline int ata_ncq_enabled(struct ata_device *dev) 1155{ 1156 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1157 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1158} 1159 1160/** 1161 * ata_pause - Flush writes and pause 400 nanoseconds. 1162 * @ap: Port to wait for. 1163 * 1164 * LOCKING: 1165 * Inherited from caller. 1166 */ 1167 1168static inline void ata_pause(struct ata_port *ap) 1169{ 1170 ata_altstatus(ap); 1171 ndelay(400); 1172} 1173 1174 1175/** 1176 * ata_busy_wait - Wait for a port status register 1177 * @ap: Port to wait for. 1178 * @bits: bits that must be clear 1179 * @max: number of 10uS waits to perform 1180 * 1181 * Waits up to max*10 microseconds for the selected bits in the port's 1182 * status register to be cleared. 1183 * Returns final value of status register. 1184 * 1185 * LOCKING: 1186 * Inherited from caller. 1187 */ 1188 1189static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1190 unsigned int max) 1191{ 1192 u8 status; 1193 1194 do { 1195 udelay(10); 1196 status = ata_chk_status(ap); 1197 max--; 1198 } while (status != 0xff && (status & bits) && (max > 0)); 1199 1200 return status; 1201} 1202 1203 1204/** 1205 * ata_wait_idle - Wait for a port to be idle. 1206 * @ap: Port to wait for. 1207 * 1208 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1209 * Returns final value of status register. 1210 * 1211 * LOCKING: 1212 * Inherited from caller. 1213 */ 1214 1215static inline u8 ata_wait_idle(struct ata_port *ap) 1216{ 1217 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1218 1219#ifdef ATA_DEBUG 1220 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1221 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1222 status); 1223#endif 1224 1225 return status; 1226} 1227 1228static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1229{ 1230 qc->tf.ctl |= ATA_NIEN; 1231} 1232 1233static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1234 unsigned int tag) 1235{ 1236 if (likely(ata_tag_valid(tag))) 1237 return &ap->qcmd[tag]; 1238 return NULL; 1239} 1240 1241static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1242 unsigned int tag) 1243{ 1244 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1245 1246 if (unlikely(!qc) || !ap->ops->error_handler) 1247 return qc; 1248 1249 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1250 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1251 return qc; 1252 1253 return NULL; 1254} 1255 1256static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1257{ 1258 memset(tf, 0, sizeof(*tf)); 1259 1260 tf->ctl = dev->link->ap->ctl; 1261 if (dev->devno == 0) 1262 tf->device = ATA_DEVICE_OBS; 1263 else 1264 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1265} 1266 1267static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1268{ 1269 qc->dma_dir = DMA_NONE; 1270 qc->__sg = NULL; 1271 qc->flags = 0; 1272 qc->cursg = qc->cursg_ofs = 0; 1273 qc->nbytes = qc->curbytes = 0; 1274 qc->n_elem = 0; 1275 qc->err_mask = 0; 1276 qc->pad_len = 0; 1277 qc->sect_size = ATA_SECT_SIZE; 1278 1279 ata_tf_init(qc->dev, &qc->tf); 1280 1281 /* init result_tf such that it indicates normal completion */ 1282 qc->result_tf.command = ATA_DRDY; 1283 qc->result_tf.feature = 0; 1284} 1285 1286static inline int ata_try_flush_cache(const struct ata_device *dev) 1287{ 1288 return ata_id_wcache_enabled(dev->id) || 1289 ata_id_has_flush(dev->id) || 1290 ata_id_has_flush_ext(dev->id); 1291} 1292 1293static inline unsigned int ac_err_mask(u8 status) 1294{ 1295 if (status & (ATA_BUSY | ATA_DRQ)) 1296 return AC_ERR_HSM; 1297 if (status & (ATA_ERR | ATA_DF)) 1298 return AC_ERR_DEV; 1299 return 0; 1300} 1301 1302static inline unsigned int __ac_err_mask(u8 status) 1303{ 1304 unsigned int mask = ac_err_mask(status); 1305 if (mask == 0) 1306 return AC_ERR_OTHER; 1307 return mask; 1308} 1309 1310static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1311{ 1312 ap->pad_dma = 0; 1313 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1314 &ap->pad_dma, GFP_KERNEL); 1315 return (ap->pad == NULL) ? -ENOMEM : 0; 1316} 1317 1318static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1319{ 1320 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1321} 1322 1323static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1324{ 1325 return *(struct ata_port **)&host->hostdata[0]; 1326} 1327 1328#endif /* __LINUX_LIBATA_H__ */ 1329