libata.h revision 1552945669b4fb23bff8d3b30221bfe3ade63515
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 << 8) - 1, 144 145 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */ 146 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */ 147 ATA_DFLAG_SPUNDOWN = (1 << 10), /* 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_NONE = 5, /* no device */ 159 160 /* struct ata_link flags */ 161 ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */ 162 ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H 163 * Register FIS clearing BSY */ 164 165 /* struct ata_port flags */ 166 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 167 /* (doesn't imply presence) */ 168 ATA_FLAG_SATA = (1 << 1), 169 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 170 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 171 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 172 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 173 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 174 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 175 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 176 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 177 * doesn't handle PIO interrupts */ 178 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 179 ATA_FLAG_DEBUGMSG = (1 << 13), 180 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 181 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 182 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 183 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 184 185 /* The following flag belongs to ap->pflags but is kept in 186 * ap->flags because it's referenced in many LLDs and will be 187 * removed in not-too-distant future. 188 */ 189 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 190 191 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 192 193 /* struct ata_port pflags */ 194 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 195 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 196 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 197 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 198 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 199 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 200 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 201 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 202 203 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 204 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 205 ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */ 206 207 /* struct ata_queued_cmd flags */ 208 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 209 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 210 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 211 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 212 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 213 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 214 215 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 216 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 217 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 218 219 /* host set flags */ 220 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 221 ATA_HOST_STARTED = (1 << 1), /* Host started */ 222 223 /* bits 24:31 of host->flags are reserved for LLD specific flags */ 224 225 /* various lengths of time */ 226 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 227 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 228 ATA_TMOUT_INTERNAL = 30 * HZ, 229 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 230 231 /* ATA bus states */ 232 BUS_UNKNOWN = 0, 233 BUS_DMA = 1, 234 BUS_IDLE = 2, 235 BUS_NOINTR = 3, 236 BUS_NODATA = 4, 237 BUS_TIMER = 5, 238 BUS_PIO = 6, 239 BUS_EDD = 7, 240 BUS_IDENTIFY = 8, 241 BUS_PACKET = 9, 242 243 /* SATA port states */ 244 PORT_UNKNOWN = 0, 245 PORT_ENABLED = 1, 246 PORT_DISABLED = 2, 247 248 /* encoding various smaller bitmaps into a single 249 * unsigned int bitmap 250 */ 251 ATA_BITS_PIO = 7, 252 ATA_BITS_MWDMA = 5, 253 ATA_BITS_UDMA = 8, 254 255 ATA_SHIFT_PIO = 0, 256 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, 257 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, 258 259 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, 260 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, 261 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, 262 263 /* size of buffer to pad xfers ending on unaligned boundaries */ 264 ATA_DMA_PAD_SZ = 4, 265 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 266 267 /* ering size */ 268 ATA_ERING_SIZE = 32, 269 270 /* desc_len for ata_eh_info and context */ 271 ATA_EH_DESC_LEN = 80, 272 273 /* reset / recovery action types */ 274 ATA_EH_REVALIDATE = (1 << 0), 275 ATA_EH_SOFTRESET = (1 << 1), 276 ATA_EH_HARDRESET = (1 << 2), 277 278 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 279 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, 280 281 /* ata_eh_info->flags */ 282 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 283 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ 284 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 285 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 286 287 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 288 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 289 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 290 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 291 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 292 293 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 294 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, 295 296 /* max repeat if error condition is still set after ->error_handler */ 297 ATA_EH_MAX_REPEAT = 5, 298 299 /* how hard are we gonna try to probe/recover devices */ 300 ATA_PROBE_MAX_TRIES = 3, 301 ATA_EH_DEV_TRIES = 3, 302 303 /* Horkage types. May be set by libata or controller on drives 304 (some horkage may be drive/controller pair dependant */ 305 306 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 307 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 308 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 309 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 310 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ 311}; 312 313enum hsm_task_states { 314 HSM_ST_IDLE, /* no command on going */ 315 HSM_ST_FIRST, /* (waiting the device to) 316 write CDB or first data block */ 317 HSM_ST, /* (waiting the device to) transfer data */ 318 HSM_ST_LAST, /* (waiting the device to) complete command */ 319 HSM_ST_ERR, /* error */ 320}; 321 322enum ata_completion_errors { 323 AC_ERR_DEV = (1 << 0), /* device reported error */ 324 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 325 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 326 AC_ERR_MEDIA = (1 << 3), /* media error */ 327 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 328 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 329 AC_ERR_SYSTEM = (1 << 6), /* system error */ 330 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 331 AC_ERR_OTHER = (1 << 8), /* unknown */ 332 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 333 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ 334}; 335 336/* forward declarations */ 337struct scsi_device; 338struct ata_port_operations; 339struct ata_port; 340struct ata_link; 341struct ata_queued_cmd; 342 343/* typedefs */ 344typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 345typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); 346typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, 347 unsigned long deadline); 348typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); 349 350struct ata_ioports { 351 void __iomem *cmd_addr; 352 void __iomem *data_addr; 353 void __iomem *error_addr; 354 void __iomem *feature_addr; 355 void __iomem *nsect_addr; 356 void __iomem *lbal_addr; 357 void __iomem *lbam_addr; 358 void __iomem *lbah_addr; 359 void __iomem *device_addr; 360 void __iomem *status_addr; 361 void __iomem *command_addr; 362 void __iomem *altstatus_addr; 363 void __iomem *ctl_addr; 364 void __iomem *bmdma_addr; 365 void __iomem *scr_addr; 366}; 367 368struct ata_host { 369 spinlock_t lock; 370 struct device *dev; 371 unsigned long irq; 372 unsigned long irq2; 373 void __iomem * const *iomap; 374 unsigned int n_ports; 375 void *private_data; 376 const struct ata_port_operations *ops; 377 unsigned long flags; 378#ifdef CONFIG_ATA_ACPI 379 acpi_handle acpi_handle; 380#endif 381 struct ata_port *simplex_claimed; /* channel owning the DMA */ 382 struct ata_port *ports[0]; 383}; 384 385struct ata_queued_cmd { 386 struct ata_port *ap; 387 struct ata_device *dev; 388 389 struct scsi_cmnd *scsicmd; 390 void (*scsidone)(struct scsi_cmnd *); 391 392 struct ata_taskfile tf; 393 u8 cdb[ATAPI_CDB_LEN]; 394 395 unsigned long flags; /* ATA_QCFLAG_xxx */ 396 unsigned int tag; 397 unsigned int n_elem; 398 unsigned int orig_n_elem; 399 400 int dma_dir; 401 402 unsigned int pad_len; 403 unsigned int sect_size; 404 405 unsigned int nbytes; 406 unsigned int curbytes; 407 408 unsigned int cursg; 409 unsigned int cursg_ofs; 410 411 struct scatterlist sgent; 412 struct scatterlist pad_sgent; 413 void *buf_virt; 414 415 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 416 struct scatterlist *__sg; 417 418 unsigned int err_mask; 419 struct ata_taskfile result_tf; 420 ata_qc_cb_t complete_fn; 421 422 void *private_data; 423 void *lldd_task; 424}; 425 426struct ata_port_stats { 427 unsigned long unhandled_irq; 428 unsigned long idle_irq; 429 unsigned long rw_reqbuf; 430}; 431 432struct ata_ering_entry { 433 int is_io; 434 unsigned int err_mask; 435 u64 timestamp; 436}; 437 438struct ata_ering { 439 int cursor; 440 struct ata_ering_entry ring[ATA_ERING_SIZE]; 441}; 442 443struct ata_device { 444 struct ata_link *link; 445 unsigned int devno; /* 0 or 1 */ 446 unsigned long flags; /* ATA_DFLAG_xxx */ 447 unsigned int horkage; /* List of broken features */ 448 struct scsi_device *sdev; /* attached SCSI device */ 449#ifdef CONFIG_ATA_ACPI 450 acpi_handle acpi_handle; 451#endif 452 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 453 u64 n_sectors; /* size of device, if ATA */ 454 unsigned int class; /* ATA_DEV_xxx */ 455 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 456 u8 pio_mode; 457 u8 dma_mode; 458 u8 xfer_mode; 459 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 460 461 unsigned int multi_count; /* sectors count for 462 READ/WRITE MULTIPLE */ 463 unsigned int max_sectors; /* per-device max sectors */ 464 unsigned int cdb_len; 465 466 /* per-dev xfer mask */ 467 unsigned int pio_mask; 468 unsigned int mwdma_mask; 469 unsigned int udma_mask; 470 471 /* for CHS addressing */ 472 u16 cylinders; /* Number of cylinders */ 473 u16 heads; /* Number of heads */ 474 u16 sectors; /* Number of sectors per track */ 475 476 /* error history */ 477 struct ata_ering ering; 478 int spdn_cnt; 479}; 480 481/* Offset into struct ata_device. Fields above it are maintained 482 * acress device init. Fields below are zeroed. 483 */ 484#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 485 486struct ata_eh_info { 487 struct ata_device *dev; /* offending device */ 488 u32 serror; /* SError from LLDD */ 489 unsigned int err_mask; /* port-wide err_mask */ 490 unsigned int action; /* ATA_EH_* action mask */ 491 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 492 unsigned int flags; /* ATA_EHI_* flags */ 493 494 unsigned int probe_mask; 495 496 char desc[ATA_EH_DESC_LEN]; 497 int desc_len; 498}; 499 500struct ata_eh_context { 501 struct ata_eh_info i; 502 int tries[ATA_MAX_DEVICES]; 503 unsigned int classes[ATA_MAX_DEVICES]; 504 unsigned int did_probe_mask; 505}; 506 507struct ata_acpi_drive 508{ 509 u32 pio; 510 u32 dma; 511} __packed; 512 513struct ata_acpi_gtm { 514 struct ata_acpi_drive drive[2]; 515 u32 flags; 516} __packed; 517 518struct ata_link { 519 struct ata_port *ap; 520 int pmp; /* port multiplier port # */ 521 522 unsigned int active_tag; /* active tag on this link */ 523 u32 sactive; /* active NCQ commands */ 524 525 unsigned int flags; /* ATA_LFLAG_xxx */ 526 527 unsigned int hw_sata_spd_limit; 528 unsigned int sata_spd_limit; 529 unsigned int sata_spd; /* current SATA PHY speed */ 530 531 /* record runtime error info, protected by host_set lock */ 532 struct ata_eh_info eh_info; 533 /* EH context */ 534 struct ata_eh_context eh_context; 535 536 struct ata_device device[ATA_MAX_DEVICES]; 537}; 538 539struct ata_port { 540 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 541 const struct ata_port_operations *ops; 542 spinlock_t *lock; 543 unsigned long flags; /* ATA_FLAG_xxx */ 544 unsigned int pflags; /* ATA_PFLAG_xxx */ 545 unsigned int print_id; /* user visible unique port ID */ 546 unsigned int port_no; /* 0 based port no. inside the host */ 547 548 struct ata_prd *prd; /* our SG list */ 549 dma_addr_t prd_dma; /* and its DMA mapping */ 550 551 void *pad; /* array of DMA pad buffers */ 552 dma_addr_t pad_dma; 553 554 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 555 556 u8 ctl; /* cache of ATA control register */ 557 u8 last_ctl; /* Cache last written value */ 558 unsigned int pio_mask; 559 unsigned int mwdma_mask; 560 unsigned int udma_mask; 561 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 562 563 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 564 unsigned long qc_allocated; 565 unsigned int qc_active; 566 567 struct ata_link link; /* host default link */ 568 569 int nr_pmp_links; /* nr of available PMP links */ 570 struct ata_link *pmp_link; /* array of PMP links */ 571 572 struct ata_port_stats stats; 573 struct ata_host *host; 574 struct device *dev; 575 576 void *port_task_data; 577 struct delayed_work port_task; 578 struct delayed_work hotplug_task; 579 struct work_struct scsi_rescan_task; 580 581 unsigned int hsm_task_state; 582 583 u32 msg_enable; 584 struct list_head eh_done_q; 585 wait_queue_head_t eh_wait_q; 586 587 pm_message_t pm_mesg; 588 int *pm_result; 589 590 struct timer_list fastdrain_timer; 591 unsigned long fastdrain_cnt; 592 593 void *private_data; 594 595#ifdef CONFIG_ATA_ACPI 596 acpi_handle acpi_handle; 597 struct ata_acpi_gtm acpi_gtm; 598#endif 599 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 600}; 601 602struct ata_port_operations { 603 void (*port_disable) (struct ata_port *); 604 605 void (*dev_config) (struct ata_device *); 606 607 void (*set_piomode) (struct ata_port *, struct ata_device *); 608 void (*set_dmamode) (struct ata_port *, struct ata_device *); 609 unsigned long (*mode_filter) (struct ata_device *, unsigned long); 610 611 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 612 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 613 614 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 615 u8 (*check_status)(struct ata_port *ap); 616 u8 (*check_altstatus)(struct ata_port *ap); 617 void (*dev_select)(struct ata_port *ap, unsigned int device); 618 619 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 620 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev); 621 622 int (*cable_detect) (struct ata_port *ap); 623 624 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 625 626 void (*bmdma_setup) (struct ata_queued_cmd *qc); 627 void (*bmdma_start) (struct ata_queued_cmd *qc); 628 629 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 630 631 void (*qc_prep) (struct ata_queued_cmd *qc); 632 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 633 634 /* Error handlers. ->error_handler overrides ->eng_timeout and 635 * indicates that new-style EH is in place. 636 */ 637 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 638 639 void (*freeze) (struct ata_port *ap); 640 void (*thaw) (struct ata_port *ap); 641 void (*error_handler) (struct ata_port *ap); 642 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 643 644 irq_handler_t irq_handler; 645 void (*irq_clear) (struct ata_port *); 646 u8 (*irq_on) (struct ata_port *); 647 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq); 648 649 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val); 650 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val); 651 652 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 653 int (*port_resume) (struct ata_port *ap); 654 655 int (*port_start) (struct ata_port *ap); 656 void (*port_stop) (struct ata_port *ap); 657 658 void (*host_stop) (struct ata_host *host); 659 660 void (*bmdma_stop) (struct ata_queued_cmd *qc); 661 u8 (*bmdma_status) (struct ata_port *ap); 662}; 663 664struct ata_port_info { 665 struct scsi_host_template *sht; 666 unsigned long flags; 667 unsigned long link_flags; 668 unsigned long pio_mask; 669 unsigned long mwdma_mask; 670 unsigned long udma_mask; 671 const struct ata_port_operations *port_ops; 672 irq_handler_t irq_handler; 673 void *private_data; 674}; 675 676struct ata_timing { 677 unsigned short mode; /* ATA mode */ 678 unsigned short setup; /* t1 */ 679 unsigned short act8b; /* t2 for 8-bit I/O */ 680 unsigned short rec8b; /* t2i for 8-bit I/O */ 681 unsigned short cyc8b; /* t0 for 8-bit I/O */ 682 unsigned short active; /* t2 or tD */ 683 unsigned short recover; /* t2i or tK */ 684 unsigned short cycle; /* t0 */ 685 unsigned short udma; /* t2CYCTYP/2 */ 686}; 687 688#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 689 690extern const unsigned long sata_deb_timing_normal[]; 691extern const unsigned long sata_deb_timing_hotplug[]; 692extern const unsigned long sata_deb_timing_long[]; 693 694extern const struct ata_port_operations ata_dummy_port_ops; 695extern const struct ata_port_info ata_dummy_port_info; 696 697static inline const unsigned long * 698sata_ehc_deb_timing(struct ata_eh_context *ehc) 699{ 700 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 701 return sata_deb_timing_hotplug; 702 else 703 return sata_deb_timing_normal; 704} 705 706static inline int ata_port_is_dummy(struct ata_port *ap) 707{ 708 return ap->ops == &ata_dummy_port_ops; 709} 710 711extern void sata_print_link_status(struct ata_link *link); 712extern void ata_port_probe(struct ata_port *); 713extern void __sata_phy_reset(struct ata_port *ap); 714extern void sata_phy_reset(struct ata_port *ap); 715extern void ata_bus_reset(struct ata_port *ap); 716extern int sata_set_spd(struct ata_link *link); 717extern int sata_link_debounce(struct ata_link *link, 718 const unsigned long *params, unsigned long deadline); 719extern int sata_link_resume(struct ata_link *link, const unsigned long *params, 720 unsigned long deadline); 721extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); 722extern int ata_std_softreset(struct ata_link *link, unsigned int *classes, 723 unsigned long deadline); 724extern int sata_link_hardreset(struct ata_link *link, 725 const unsigned long *timing, unsigned long deadline); 726extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, 727 unsigned long deadline); 728extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); 729extern void ata_port_disable(struct ata_port *); 730extern void ata_std_ports(struct ata_ioports *ioaddr); 731#ifdef CONFIG_PCI 732extern int ata_pci_init_one (struct pci_dev *pdev, 733 const struct ata_port_info * const * ppi); 734extern void ata_pci_remove_one (struct pci_dev *pdev); 735#ifdef CONFIG_PM 736extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 737extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 738extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 739extern int ata_pci_device_resume(struct pci_dev *pdev); 740#endif 741extern int ata_pci_clear_simplex(struct pci_dev *pdev); 742#endif /* CONFIG_PCI */ 743extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 744extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 745 const struct ata_port_info * const * ppi, int n_ports); 746extern int ata_host_start(struct ata_host *host); 747extern int ata_host_register(struct ata_host *host, 748 struct scsi_host_template *sht); 749extern int ata_host_activate(struct ata_host *host, int irq, 750 irq_handler_t irq_handler, unsigned long irq_flags, 751 struct scsi_host_template *sht); 752extern void ata_host_detach(struct ata_host *host); 753extern void ata_host_init(struct ata_host *, struct device *, 754 unsigned long, const struct ata_port_operations *); 755extern int ata_scsi_detect(struct scsi_host_template *sht); 756extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 757extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 758extern void ata_scsi_media_change_notify(struct ata_device *atadev); 759extern void ata_sas_port_destroy(struct ata_port *); 760extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 761 struct ata_port_info *, struct Scsi_Host *); 762extern int ata_sas_port_init(struct ata_port *); 763extern int ata_sas_port_start(struct ata_port *ap); 764extern void ata_sas_port_stop(struct ata_port *ap); 765extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 766extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 767 struct ata_port *ap); 768extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 769extern int sata_scr_valid(struct ata_link *link); 770extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); 771extern int sata_scr_write(struct ata_link *link, int reg, u32 val); 772extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); 773extern int ata_link_online(struct ata_link *link); 774extern int ata_link_offline(struct ata_link *link); 775#ifdef CONFIG_PM 776extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 777extern void ata_host_resume(struct ata_host *host); 778#endif 779extern int ata_ratelimit(void); 780extern int ata_busy_sleep(struct ata_port *ap, 781 unsigned long timeout_pat, unsigned long timeout); 782extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline); 783extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 784 void *data, unsigned long delay); 785extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 786 unsigned long interval_msec, 787 unsigned long timeout_msec); 788extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *); 789 790/* 791 * Default driver ops implementations 792 */ 793extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 794extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 795extern void ata_tf_to_fis(const struct ata_taskfile *tf, 796 u8 pmp, int is_cmd, u8 *fis); 797extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 798extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 799extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 800extern u8 ata_check_status(struct ata_port *ap); 801extern u8 ata_altstatus(struct ata_port *ap); 802extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 803extern int ata_port_start (struct ata_port *ap); 804extern int ata_sff_port_start (struct ata_port *ap); 805extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 806extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 807 unsigned int buflen, int write_data); 808extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 809 unsigned int buflen, int write_data); 810extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc); 811extern void ata_qc_prep(struct ata_queued_cmd *qc); 812extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 813extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 814extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 815 unsigned int buflen); 816extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 817 unsigned int n_elem); 818extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 819extern void ata_dev_disable(struct ata_device *adev); 820extern void ata_id_string(const u16 *id, unsigned char *s, 821 unsigned int ofs, unsigned int len); 822extern void ata_id_c_string(const u16 *id, unsigned char *s, 823 unsigned int ofs, unsigned int len); 824extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); 825extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 826extern void ata_bmdma_start (struct ata_queued_cmd *qc); 827extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 828extern u8 ata_bmdma_status(struct ata_port *ap); 829extern void ata_bmdma_irq_clear(struct ata_port *ap); 830extern void ata_bmdma_freeze(struct ata_port *ap); 831extern void ata_bmdma_thaw(struct ata_port *ap); 832extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 833 ata_reset_fn_t softreset, 834 ata_reset_fn_t hardreset, 835 ata_postreset_fn_t postreset); 836extern void ata_bmdma_error_handler(struct ata_port *ap); 837extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 838extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 839 u8 status, int in_wq); 840extern void ata_qc_complete(struct ata_queued_cmd *qc); 841extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 842 void (*finish_qc)(struct ata_queued_cmd *)); 843extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 844 void (*done)(struct scsi_cmnd *)); 845extern int ata_std_bios_param(struct scsi_device *sdev, 846 struct block_device *bdev, 847 sector_t capacity, int geom[]); 848extern int ata_scsi_slave_config(struct scsi_device *sdev); 849extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 850extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 851 int queue_depth); 852extern struct ata_device *ata_dev_pair(struct ata_device *adev); 853extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); 854extern u8 ata_irq_on(struct ata_port *ap); 855extern u8 ata_dummy_irq_on(struct ata_port *ap); 856extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); 857extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); 858 859extern int ata_cable_40wire(struct ata_port *ap); 860extern int ata_cable_80wire(struct ata_port *ap); 861extern int ata_cable_sata(struct ata_port *ap); 862extern int ata_cable_unknown(struct ata_port *ap); 863 864/* 865 * Timing helpers 866 */ 867 868extern unsigned int ata_pio_need_iordy(const struct ata_device *); 869extern int ata_timing_compute(struct ata_device *, unsigned short, 870 struct ata_timing *, int, int); 871extern void ata_timing_merge(const struct ata_timing *, 872 const struct ata_timing *, struct ata_timing *, 873 unsigned int); 874 875enum { 876 ATA_TIMING_SETUP = (1 << 0), 877 ATA_TIMING_ACT8B = (1 << 1), 878 ATA_TIMING_REC8B = (1 << 2), 879 ATA_TIMING_CYC8B = (1 << 3), 880 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 881 ATA_TIMING_CYC8B, 882 ATA_TIMING_ACTIVE = (1 << 4), 883 ATA_TIMING_RECOVER = (1 << 5), 884 ATA_TIMING_CYCLE = (1 << 6), 885 ATA_TIMING_UDMA = (1 << 7), 886 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 887 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 888 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 889 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 890}; 891 892 893#ifdef CONFIG_PCI 894struct pci_bits { 895 unsigned int reg; /* PCI config register to read */ 896 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 897 unsigned long mask; 898 unsigned long val; 899}; 900 901extern int ata_pci_init_sff_host(struct ata_host *host); 902extern int ata_pci_init_bmdma(struct ata_host *host); 903extern int ata_pci_prepare_sff_host(struct pci_dev *pdev, 904 const struct ata_port_info * const * ppi, 905 struct ata_host **r_host); 906extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 907extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); 908#endif /* CONFIG_PCI */ 909 910/* 911 * EH 912 */ 913extern void ata_eng_timeout(struct ata_port *ap); 914 915extern void ata_port_schedule_eh(struct ata_port *ap); 916extern int ata_link_abort(struct ata_link *link); 917extern int ata_port_abort(struct ata_port *ap); 918extern int ata_port_freeze(struct ata_port *ap); 919 920extern void ata_eh_freeze_port(struct ata_port *ap); 921extern void ata_eh_thaw_port(struct ata_port *ap); 922 923extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 924extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 925 926extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 927 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 928 ata_postreset_fn_t postreset); 929 930/* 931 * printk helpers 932 */ 933#define ata_port_printk(ap, lv, fmt, args...) \ 934 printk(lv"ata%u: "fmt, (ap)->print_id , ##args) 935 936#define ata_link_printk(link, lv, fmt, args...) do { \ 937 if ((link)->ap->nr_pmp_links) \ 938 printk(lv"ata%u.%02u: "fmt, (link)->ap->print_id, \ 939 (link)->pmp , ##args); \ 940 else \ 941 printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args); \ 942 } while(0) 943 944#define ata_dev_printk(dev, lv, fmt, args...) \ 945 printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, \ 946 (dev)->link->pmp + (dev)->devno , ##args) 947 948/* 949 * ata_eh_info helpers 950 */ 951extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 952extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); 953extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); 954 955static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi) 956{ 957 ehi->flags |= ATA_EHI_RESUME_LINK; 958 ehi->action |= ATA_EH_SOFTRESET; 959 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 960} 961 962static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 963{ 964 ata_ehi_schedule_probe(ehi); 965 ehi->flags |= ATA_EHI_HOTPLUGGED; 966 ehi->err_mask |= AC_ERR_ATA_BUS; 967} 968 969/* 970 * qc helpers 971 */ 972static inline int 973ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 974{ 975 if (sg == &qc->pad_sgent) 976 return 1; 977 if (qc->pad_len) 978 return 0; 979 if (((sg - qc->__sg) + 1) == qc->n_elem) 980 return 1; 981 return 0; 982} 983 984static inline struct scatterlist * 985ata_qc_first_sg(struct ata_queued_cmd *qc) 986{ 987 if (qc->n_elem) 988 return qc->__sg; 989 if (qc->pad_len) 990 return &qc->pad_sgent; 991 return NULL; 992} 993 994static inline struct scatterlist * 995ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 996{ 997 if (sg == &qc->pad_sgent) 998 return NULL; 999 if (++sg - qc->__sg < qc->n_elem) 1000 return sg; 1001 if (qc->pad_len) 1002 return &qc->pad_sgent; 1003 return NULL; 1004} 1005 1006#define ata_for_each_sg(sg, qc) \ 1007 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 1008 1009static inline unsigned int ata_tag_valid(unsigned int tag) 1010{ 1011 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 1012} 1013 1014static inline unsigned int ata_tag_internal(unsigned int tag) 1015{ 1016 return tag == ATA_MAX_QUEUE - 1; 1017} 1018 1019/* 1020 * device helpers 1021 */ 1022static inline unsigned int ata_class_enabled(unsigned int class) 1023{ 1024 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 1025} 1026 1027static inline unsigned int ata_class_disabled(unsigned int class) 1028{ 1029 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 1030} 1031 1032static inline unsigned int ata_class_absent(unsigned int class) 1033{ 1034 return !ata_class_enabled(class) && !ata_class_disabled(class); 1035} 1036 1037static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1038{ 1039 return ata_class_enabled(dev->class); 1040} 1041 1042static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1043{ 1044 return ata_class_disabled(dev->class); 1045} 1046 1047static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1048{ 1049 return ata_class_absent(dev->class); 1050} 1051 1052/* 1053 * link helpers 1054 */ 1055static inline int ata_is_host_link(const struct ata_link *link) 1056{ 1057 return link == &link->ap->link; 1058} 1059 1060static inline int ata_link_max_devices(const struct ata_link *link) 1061{ 1062 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) 1063 return 2; 1064 return 1; 1065} 1066 1067static inline struct ata_link *ata_port_first_link(struct ata_port *ap) 1068{ 1069 if (ap->nr_pmp_links) 1070 return ap->pmp_link; 1071 return &ap->link; 1072} 1073 1074static inline struct ata_link *ata_port_next_link(struct ata_link *link) 1075{ 1076 struct ata_port *ap = link->ap; 1077 1078 if (link == &ap->link) { 1079 if (!ap->nr_pmp_links) 1080 return NULL; 1081 return ap->pmp_link; 1082 } 1083 1084 if (++link - ap->pmp_link < ap->nr_pmp_links) 1085 return link; 1086 return NULL; 1087} 1088 1089#define __ata_port_for_each_link(lk, ap) \ 1090 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk)) 1091 1092#define ata_port_for_each_link(link, ap) \ 1093 for ((link) = ata_port_first_link(ap); (link); \ 1094 (link) = ata_port_next_link(link)) 1095 1096#define ata_link_for_each_dev(dev, link) \ 1097 for ((dev) = (link)->device; \ 1098 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \ 1099 (dev)++) 1100 1101#define ata_link_for_each_dev_reverse(dev, link) \ 1102 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \ 1103 (dev) >= (link)->device || ((dev) = NULL); (dev)--) 1104 1105static inline u8 ata_chk_status(struct ata_port *ap) 1106{ 1107 return ap->ops->check_status(ap); 1108} 1109 1110/** 1111 * ata_ncq_enabled - Test whether NCQ is enabled 1112 * @dev: ATA device to test for 1113 * 1114 * LOCKING: 1115 * spin_lock_irqsave(host lock) 1116 * 1117 * RETURNS: 1118 * 1 if NCQ is enabled for @dev, 0 otherwise. 1119 */ 1120static inline int ata_ncq_enabled(struct ata_device *dev) 1121{ 1122 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1123 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1124} 1125 1126/** 1127 * ata_pause - Flush writes and pause 400 nanoseconds. 1128 * @ap: Port to wait for. 1129 * 1130 * LOCKING: 1131 * Inherited from caller. 1132 */ 1133 1134static inline void ata_pause(struct ata_port *ap) 1135{ 1136 ata_altstatus(ap); 1137 ndelay(400); 1138} 1139 1140 1141/** 1142 * ata_busy_wait - Wait for a port status register 1143 * @ap: Port to wait for. 1144 * @bits: bits that must be clear 1145 * @max: number of 10uS waits to perform 1146 * 1147 * Waits up to max*10 microseconds for the selected bits in the port's 1148 * status register to be cleared. 1149 * Returns final value of status register. 1150 * 1151 * LOCKING: 1152 * Inherited from caller. 1153 */ 1154 1155static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1156 unsigned int max) 1157{ 1158 u8 status; 1159 1160 do { 1161 udelay(10); 1162 status = ata_chk_status(ap); 1163 max--; 1164 } while (status != 0xff && (status & bits) && (max > 0)); 1165 1166 return status; 1167} 1168 1169 1170/** 1171 * ata_wait_idle - Wait for a port to be idle. 1172 * @ap: Port to wait for. 1173 * 1174 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1175 * Returns final value of status register. 1176 * 1177 * LOCKING: 1178 * Inherited from caller. 1179 */ 1180 1181static inline u8 ata_wait_idle(struct ata_port *ap) 1182{ 1183 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1184 1185#ifdef ATA_DEBUG 1186 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1187 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n", 1188 status); 1189#endif 1190 1191 return status; 1192} 1193 1194static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1195{ 1196 qc->tf.ctl |= ATA_NIEN; 1197} 1198 1199static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1200 unsigned int tag) 1201{ 1202 if (likely(ata_tag_valid(tag))) 1203 return &ap->qcmd[tag]; 1204 return NULL; 1205} 1206 1207static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1208 unsigned int tag) 1209{ 1210 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1211 1212 if (unlikely(!qc) || !ap->ops->error_handler) 1213 return qc; 1214 1215 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1216 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1217 return qc; 1218 1219 return NULL; 1220} 1221 1222static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1223{ 1224 memset(tf, 0, sizeof(*tf)); 1225 1226 tf->ctl = dev->link->ap->ctl; 1227 if (dev->devno == 0) 1228 tf->device = ATA_DEVICE_OBS; 1229 else 1230 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1231} 1232 1233static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1234{ 1235 qc->dma_dir = DMA_NONE; 1236 qc->__sg = NULL; 1237 qc->flags = 0; 1238 qc->cursg = qc->cursg_ofs = 0; 1239 qc->nbytes = qc->curbytes = 0; 1240 qc->n_elem = 0; 1241 qc->err_mask = 0; 1242 qc->pad_len = 0; 1243 qc->sect_size = ATA_SECT_SIZE; 1244 1245 ata_tf_init(qc->dev, &qc->tf); 1246 1247 /* init result_tf such that it indicates normal completion */ 1248 qc->result_tf.command = ATA_DRDY; 1249 qc->result_tf.feature = 0; 1250} 1251 1252static inline int ata_try_flush_cache(const struct ata_device *dev) 1253{ 1254 return ata_id_wcache_enabled(dev->id) || 1255 ata_id_has_flush(dev->id) || 1256 ata_id_has_flush_ext(dev->id); 1257} 1258 1259static inline unsigned int ac_err_mask(u8 status) 1260{ 1261 if (status & (ATA_BUSY | ATA_DRQ)) 1262 return AC_ERR_HSM; 1263 if (status & (ATA_ERR | ATA_DF)) 1264 return AC_ERR_DEV; 1265 return 0; 1266} 1267 1268static inline unsigned int __ac_err_mask(u8 status) 1269{ 1270 unsigned int mask = ac_err_mask(status); 1271 if (mask == 0) 1272 return AC_ERR_OTHER; 1273 return mask; 1274} 1275 1276static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1277{ 1278 ap->pad_dma = 0; 1279 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1280 &ap->pad_dma, GFP_KERNEL); 1281 return (ap->pad == NULL) ? -ENOMEM : 0; 1282} 1283 1284static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1285{ 1286 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1287} 1288 1289static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1290{ 1291 return *(struct ata_port **)&host->hostdata[0]; 1292} 1293 1294#endif /* __LINUX_LIBATA_H__ */ 1295