libata.h revision 13b8d09f5de0aaa3153bbccc98baf247387823dc
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 ATA_MAX_PORTS = 8, 120 ATA_DEF_QUEUE = 1, 121 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 122 ATA_MAX_QUEUE = 32, 123 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 124 ATA_MAX_BUS = 2, 125 ATA_DEF_BUSY_WAIT = 10000, 126 ATA_SHORT_PAUSE = (HZ >> 6) + 1, 127 128 ATA_SHT_EMULATED = 1, 129 ATA_SHT_CMD_PER_LUN = 1, 130 ATA_SHT_THIS_ID = -1, 131 ATA_SHT_USE_CLUSTERING = 1, 132 133 /* struct ata_device stuff */ 134 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 135 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 136 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 137 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 138 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 139 ATA_DFLAG_CFG_MASK = (1 << 8) - 1, 140 141 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */ 142 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */ 143 ATA_DFLAG_SPUNDOWN = (1 << 10), /* XXX: for spindown_compat */ 144 ATA_DFLAG_INIT_MASK = (1 << 16) - 1, 145 146 ATA_DFLAG_DETACH = (1 << 16), 147 ATA_DFLAG_DETACHED = (1 << 17), 148 149 ATA_DEV_UNKNOWN = 0, /* unknown device */ 150 ATA_DEV_ATA = 1, /* ATA device */ 151 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 152 ATA_DEV_ATAPI = 3, /* ATAPI device */ 153 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 154 ATA_DEV_NONE = 5, /* no device */ 155 156 /* struct ata_port flags */ 157 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 158 /* (doesn't imply presence) */ 159 ATA_FLAG_SATA = (1 << 1), 160 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 161 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 162 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 163 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 164 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 165 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 166 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 167 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 168 * doesn't handle PIO interrupts */ 169 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 170 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ 171 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H 172 * Register FIS clearing BSY */ 173 ATA_FLAG_DEBUGMSG = (1 << 13), 174 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */ 175 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 176 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 177 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 178 179 /* The following flag belongs to ap->pflags but is kept in 180 * ap->flags because it's referenced in many LLDs and will be 181 * removed in not-too-distant future. 182 */ 183 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 184 185 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 186 187 /* struct ata_port pflags */ 188 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 189 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 190 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 191 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 192 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 193 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 194 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 195 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 196 197 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */ 198 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 199 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 200 201 /* struct ata_queued_cmd flags */ 202 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 203 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 204 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 205 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 206 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 207 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 208 209 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 210 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 211 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 212 213 /* host set flags */ 214 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 215 ATA_HOST_STARTED = (1 << 1), /* Host started */ 216 217 /* various lengths of time */ 218 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 219 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 220 ATA_TMOUT_INTERNAL = 30 * HZ, 221 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 222 223 /* ATA bus states */ 224 BUS_UNKNOWN = 0, 225 BUS_DMA = 1, 226 BUS_IDLE = 2, 227 BUS_NOINTR = 3, 228 BUS_NODATA = 4, 229 BUS_TIMER = 5, 230 BUS_PIO = 6, 231 BUS_EDD = 7, 232 BUS_IDENTIFY = 8, 233 BUS_PACKET = 9, 234 235 /* SATA port states */ 236 PORT_UNKNOWN = 0, 237 PORT_ENABLED = 1, 238 PORT_DISABLED = 2, 239 240 /* encoding various smaller bitmaps into a single 241 * unsigned int bitmap 242 */ 243 ATA_BITS_PIO = 7, 244 ATA_BITS_MWDMA = 5, 245 ATA_BITS_UDMA = 8, 246 247 ATA_SHIFT_PIO = 0, 248 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, 249 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, 250 251 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, 252 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, 253 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, 254 255 /* size of buffer to pad xfers ending on unaligned boundaries */ 256 ATA_DMA_PAD_SZ = 4, 257 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 258 259 /* ering size */ 260 ATA_ERING_SIZE = 32, 261 262 /* desc_len for ata_eh_info and context */ 263 ATA_EH_DESC_LEN = 80, 264 265 /* reset / recovery action types */ 266 ATA_EH_REVALIDATE = (1 << 0), 267 ATA_EH_SOFTRESET = (1 << 1), 268 ATA_EH_HARDRESET = (1 << 2), 269 270 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 271 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, 272 273 /* ata_eh_info->flags */ 274 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 275 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ 276 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 277 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 278 279 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 280 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 281 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 282 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 283 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 284 285 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 286 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, 287 288 /* max repeat if error condition is still set after ->error_handler */ 289 ATA_EH_MAX_REPEAT = 5, 290 291 /* how hard are we gonna try to probe/recover devices */ 292 ATA_PROBE_MAX_TRIES = 3, 293 ATA_EH_DEV_TRIES = 3, 294 295 /* Horkage types. May be set by libata or controller on drives 296 (some horkage may be drive/controller pair dependant */ 297 298 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 299 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 300 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 301 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 302 ATA_HORKAGE_DMA_RW_ONLY = (1 << 4), /* ATAPI DMA for RW only */ 303}; 304 305enum hsm_task_states { 306 HSM_ST_IDLE, /* no command on going */ 307 HSM_ST_FIRST, /* (waiting the device to) 308 write CDB or first data block */ 309 HSM_ST, /* (waiting the device to) transfer data */ 310 HSM_ST_LAST, /* (waiting the device to) complete command */ 311 HSM_ST_ERR, /* error */ 312}; 313 314enum ata_completion_errors { 315 AC_ERR_DEV = (1 << 0), /* device reported error */ 316 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 317 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 318 AC_ERR_MEDIA = (1 << 3), /* media error */ 319 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 320 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 321 AC_ERR_SYSTEM = (1 << 6), /* system error */ 322 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 323 AC_ERR_OTHER = (1 << 8), /* unknown */ 324 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 325}; 326 327/* forward declarations */ 328struct scsi_device; 329struct ata_port_operations; 330struct ata_port; 331struct ata_queued_cmd; 332 333/* typedefs */ 334typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 335typedef int (*ata_prereset_fn_t)(struct ata_port *ap, unsigned long deadline); 336typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes, 337 unsigned long deadline); 338typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 339 340struct ata_ioports { 341 void __iomem *cmd_addr; 342 void __iomem *data_addr; 343 void __iomem *error_addr; 344 void __iomem *feature_addr; 345 void __iomem *nsect_addr; 346 void __iomem *lbal_addr; 347 void __iomem *lbam_addr; 348 void __iomem *lbah_addr; 349 void __iomem *device_addr; 350 void __iomem *status_addr; 351 void __iomem *command_addr; 352 void __iomem *altstatus_addr; 353 void __iomem *ctl_addr; 354 void __iomem *bmdma_addr; 355 void __iomem *scr_addr; 356}; 357 358struct ata_host { 359 spinlock_t lock; 360 struct device *dev; 361 unsigned long irq; 362 unsigned long irq2; 363 void __iomem * const *iomap; 364 unsigned int n_ports; 365 void *private_data; 366 const struct ata_port_operations *ops; 367 unsigned long flags; 368 struct ata_port *simplex_claimed; /* channel owning the DMA */ 369 struct ata_port *ports[0]; 370}; 371 372struct ata_queued_cmd { 373 struct ata_port *ap; 374 struct ata_device *dev; 375 376 struct scsi_cmnd *scsicmd; 377 void (*scsidone)(struct scsi_cmnd *); 378 379 struct ata_taskfile tf; 380 u8 cdb[ATAPI_CDB_LEN]; 381 382 unsigned long flags; /* ATA_QCFLAG_xxx */ 383 unsigned int tag; 384 unsigned int n_elem; 385 unsigned int orig_n_elem; 386 387 int dma_dir; 388 389 unsigned int pad_len; 390 unsigned int sect_size; 391 392 unsigned int nbytes; 393 unsigned int curbytes; 394 395 unsigned int cursg; 396 unsigned int cursg_ofs; 397 398 struct scatterlist sgent; 399 struct scatterlist pad_sgent; 400 void *buf_virt; 401 402 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 403 struct scatterlist *__sg; 404 405 unsigned int err_mask; 406 struct ata_taskfile result_tf; 407 ata_qc_cb_t complete_fn; 408 409 void *private_data; 410}; 411 412struct ata_port_stats { 413 unsigned long unhandled_irq; 414 unsigned long idle_irq; 415 unsigned long rw_reqbuf; 416}; 417 418struct ata_ering_entry { 419 int is_io; 420 unsigned int err_mask; 421 u64 timestamp; 422}; 423 424struct ata_ering { 425 int cursor; 426 struct ata_ering_entry ring[ATA_ERING_SIZE]; 427}; 428 429struct ata_device { 430 struct ata_port *ap; 431 unsigned int devno; /* 0 or 1 */ 432 unsigned long flags; /* ATA_DFLAG_xxx */ 433 struct scsi_device *sdev; /* attached SCSI device */ 434 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 435 u64 n_sectors; /* size of device, if ATA */ 436 unsigned int class; /* ATA_DEV_xxx */ 437 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 438 u8 pio_mode; 439 u8 dma_mode; 440 u8 xfer_mode; 441 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 442 443 unsigned int multi_count; /* sectors count for 444 READ/WRITE MULTIPLE */ 445 unsigned int max_sectors; /* per-device max sectors */ 446 unsigned int cdb_len; 447 448 /* per-dev xfer mask */ 449 unsigned int pio_mask; 450 unsigned int mwdma_mask; 451 unsigned int udma_mask; 452 453 /* for CHS addressing */ 454 u16 cylinders; /* Number of cylinders */ 455 u16 heads; /* Number of heads */ 456 u16 sectors; /* Number of sectors per track */ 457 458 /* error history */ 459 struct ata_ering ering; 460 int spdn_cnt; 461 unsigned int horkage; /* List of broken features */ 462#ifdef CONFIG_ATA_ACPI 463 /* ACPI objects info */ 464 acpi_handle obj_handle; 465#endif 466}; 467 468/* Offset into struct ata_device. Fields above it are maintained 469 * acress device init. Fields below are zeroed. 470 */ 471#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 472 473struct ata_eh_info { 474 struct ata_device *dev; /* offending device */ 475 u32 serror; /* SError from LLDD */ 476 unsigned int err_mask; /* port-wide err_mask */ 477 unsigned int action; /* ATA_EH_* action mask */ 478 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 479 unsigned int flags; /* ATA_EHI_* flags */ 480 481 unsigned int probe_mask; 482 483 char desc[ATA_EH_DESC_LEN]; 484 int desc_len; 485}; 486 487struct ata_eh_context { 488 struct ata_eh_info i; 489 int tries[ATA_MAX_DEVICES]; 490 unsigned int classes[ATA_MAX_DEVICES]; 491 unsigned int did_probe_mask; 492}; 493 494struct ata_port { 495 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 496 const struct ata_port_operations *ops; 497 spinlock_t *lock; 498 unsigned long flags; /* ATA_FLAG_xxx */ 499 unsigned int pflags; /* ATA_PFLAG_xxx */ 500 unsigned int print_id; /* user visible unique port ID */ 501 unsigned int port_no; /* 0 based port no. inside the host */ 502 503 struct ata_prd *prd; /* our SG list */ 504 dma_addr_t prd_dma; /* and its DMA mapping */ 505 506 void *pad; /* array of DMA pad buffers */ 507 dma_addr_t pad_dma; 508 509 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 510 511 u8 ctl; /* cache of ATA control register */ 512 u8 last_ctl; /* Cache last written value */ 513 unsigned int pio_mask; 514 unsigned int mwdma_mask; 515 unsigned int udma_mask; 516 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 517 unsigned int hw_sata_spd_limit; 518 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 519 520 /* record runtime error info, protected by host lock */ 521 struct ata_eh_info eh_info; 522 /* EH context owned by EH */ 523 struct ata_eh_context eh_context; 524 525 struct ata_device device[ATA_MAX_DEVICES]; 526 527 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 528 unsigned long qc_allocated; 529 unsigned int qc_active; 530 531 unsigned int active_tag; 532 u32 sactive; 533 534 struct ata_port_stats stats; 535 struct ata_host *host; 536 struct device *dev; 537 538 void *port_task_data; 539 struct delayed_work port_task; 540 struct delayed_work hotplug_task; 541 struct work_struct scsi_rescan_task; 542 543 unsigned int hsm_task_state; 544 545 u32 msg_enable; 546 struct list_head eh_done_q; 547 wait_queue_head_t eh_wait_q; 548 549 pm_message_t pm_mesg; 550 int *pm_result; 551 552 void *private_data; 553 554 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 555}; 556 557struct ata_port_operations { 558 void (*port_disable) (struct ata_port *); 559 560 void (*dev_config) (struct ata_device *); 561 562 void (*set_piomode) (struct ata_port *, struct ata_device *); 563 void (*set_dmamode) (struct ata_port *, struct ata_device *); 564 unsigned long (*mode_filter) (struct ata_device *, unsigned long); 565 566 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 567 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 568 569 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 570 u8 (*check_status)(struct ata_port *ap); 571 u8 (*check_altstatus)(struct ata_port *ap); 572 void (*dev_select)(struct ata_port *ap, unsigned int device); 573 574 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 575 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev); 576 577 void (*post_set_mode) (struct ata_port *ap); 578 579 int (*cable_detect) (struct ata_port *ap); 580 581 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 582 583 void (*bmdma_setup) (struct ata_queued_cmd *qc); 584 void (*bmdma_start) (struct ata_queued_cmd *qc); 585 586 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 587 588 void (*qc_prep) (struct ata_queued_cmd *qc); 589 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 590 591 /* Error handlers. ->error_handler overrides ->eng_timeout and 592 * indicates that new-style EH is in place. 593 */ 594 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 595 596 void (*freeze) (struct ata_port *ap); 597 void (*thaw) (struct ata_port *ap); 598 void (*error_handler) (struct ata_port *ap); 599 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 600 601 irq_handler_t irq_handler; 602 void (*irq_clear) (struct ata_port *); 603 u8 (*irq_on) (struct ata_port *); 604 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq); 605 606 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 607 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 608 u32 val); 609 610 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 611 int (*port_resume) (struct ata_port *ap); 612 613 int (*port_start) (struct ata_port *ap); 614 void (*port_stop) (struct ata_port *ap); 615 616 void (*host_stop) (struct ata_host *host); 617 618 void (*bmdma_stop) (struct ata_queued_cmd *qc); 619 u8 (*bmdma_status) (struct ata_port *ap); 620}; 621 622struct ata_port_info { 623 struct scsi_host_template *sht; 624 unsigned long flags; 625 unsigned long pio_mask; 626 unsigned long mwdma_mask; 627 unsigned long udma_mask; 628 const struct ata_port_operations *port_ops; 629 irq_handler_t irq_handler; 630 void *private_data; 631}; 632 633struct ata_timing { 634 unsigned short mode; /* ATA mode */ 635 unsigned short setup; /* t1 */ 636 unsigned short act8b; /* t2 for 8-bit I/O */ 637 unsigned short rec8b; /* t2i for 8-bit I/O */ 638 unsigned short cyc8b; /* t0 for 8-bit I/O */ 639 unsigned short active; /* t2 or tD */ 640 unsigned short recover; /* t2i or tK */ 641 unsigned short cycle; /* t0 */ 642 unsigned short udma; /* t2CYCTYP/2 */ 643}; 644 645#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 646 647extern const unsigned long sata_deb_timing_normal[]; 648extern const unsigned long sata_deb_timing_hotplug[]; 649extern const unsigned long sata_deb_timing_long[]; 650 651extern const struct ata_port_operations ata_dummy_port_ops; 652extern const struct ata_port_info ata_dummy_port_info; 653 654static inline const unsigned long * 655sata_ehc_deb_timing(struct ata_eh_context *ehc) 656{ 657 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 658 return sata_deb_timing_hotplug; 659 else 660 return sata_deb_timing_normal; 661} 662 663static inline int ata_port_is_dummy(struct ata_port *ap) 664{ 665 return ap->ops == &ata_dummy_port_ops; 666} 667 668extern void sata_print_link_status(struct ata_port *ap); 669extern void ata_port_probe(struct ata_port *); 670extern void __sata_phy_reset(struct ata_port *ap); 671extern void sata_phy_reset(struct ata_port *ap); 672extern void ata_bus_reset(struct ata_port *ap); 673extern int sata_set_spd(struct ata_port *ap); 674extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param, 675 unsigned long deadline); 676extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param, 677 unsigned long deadline); 678extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline); 679extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes, 680 unsigned long deadline); 681extern int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing, 682 unsigned long deadline); 683extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class, 684 unsigned long deadline); 685extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 686extern void ata_port_disable(struct ata_port *); 687extern void ata_std_ports(struct ata_ioports *ioaddr); 688#ifdef CONFIG_PCI 689extern int ata_pci_init_one (struct pci_dev *pdev, 690 const struct ata_port_info * const * ppi); 691extern void ata_pci_remove_one (struct pci_dev *pdev); 692#ifdef CONFIG_PM 693extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 694extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 695extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 696extern int ata_pci_device_resume(struct pci_dev *pdev); 697#endif 698extern int ata_pci_clear_simplex(struct pci_dev *pdev); 699#endif /* CONFIG_PCI */ 700extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 701extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 702 const struct ata_port_info * const * ppi, int n_ports); 703extern int ata_host_start(struct ata_host *host); 704extern int ata_host_register(struct ata_host *host, 705 struct scsi_host_template *sht); 706extern int ata_host_activate(struct ata_host *host, int irq, 707 irq_handler_t irq_handler, unsigned long irq_flags, 708 struct scsi_host_template *sht); 709extern void ata_host_detach(struct ata_host *host); 710extern void ata_host_init(struct ata_host *, struct device *, 711 unsigned long, const struct ata_port_operations *); 712extern int ata_scsi_detect(struct scsi_host_template *sht); 713extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 714extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 715extern void ata_sas_port_destroy(struct ata_port *); 716extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 717 struct ata_port_info *, struct Scsi_Host *); 718extern int ata_sas_port_init(struct ata_port *); 719extern int ata_sas_port_start(struct ata_port *ap); 720extern void ata_sas_port_stop(struct ata_port *ap); 721extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 722extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 723 struct ata_port *ap); 724extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 725extern int sata_scr_valid(struct ata_port *ap); 726extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 727extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 728extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 729extern int ata_port_online(struct ata_port *ap); 730extern int ata_port_offline(struct ata_port *ap); 731#ifdef CONFIG_PM 732extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 733extern void ata_host_resume(struct ata_host *host); 734#endif 735extern int ata_ratelimit(void); 736extern int ata_busy_sleep(struct ata_port *ap, 737 unsigned long timeout_pat, unsigned long timeout); 738extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline); 739extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 740 void *data, unsigned long delay); 741extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 742 unsigned long interval_msec, 743 unsigned long timeout_msec); 744extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *); 745 746/* 747 * Default driver ops implementations 748 */ 749extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 750extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 751extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 752extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 753extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 754extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 755extern u8 ata_check_status(struct ata_port *ap); 756extern u8 ata_altstatus(struct ata_port *ap); 757extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 758extern int ata_port_start (struct ata_port *ap); 759extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 760extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 761 unsigned int buflen, int write_data); 762extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 763 unsigned int buflen, int write_data); 764extern void ata_qc_prep(struct ata_queued_cmd *qc); 765extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 766extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 767extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 768 unsigned int buflen); 769extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 770 unsigned int n_elem); 771extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 772extern void ata_dev_disable(struct ata_device *adev); 773extern void ata_id_string(const u16 *id, unsigned char *s, 774 unsigned int ofs, unsigned int len); 775extern void ata_id_c_string(const u16 *id, unsigned char *s, 776 unsigned int ofs, unsigned int len); 777extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); 778extern unsigned long ata_device_blacklisted(const struct ata_device *dev); 779extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 780extern void ata_bmdma_start (struct ata_queued_cmd *qc); 781extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 782extern u8 ata_bmdma_status(struct ata_port *ap); 783extern void ata_bmdma_irq_clear(struct ata_port *ap); 784extern void ata_bmdma_freeze(struct ata_port *ap); 785extern void ata_bmdma_thaw(struct ata_port *ap); 786extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 787 ata_reset_fn_t softreset, 788 ata_reset_fn_t hardreset, 789 ata_postreset_fn_t postreset); 790extern void ata_bmdma_error_handler(struct ata_port *ap); 791extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 792extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 793 u8 status, int in_wq); 794extern void ata_qc_complete(struct ata_queued_cmd *qc); 795extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 796 void (*finish_qc)(struct ata_queued_cmd *)); 797extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 798 void (*done)(struct scsi_cmnd *)); 799extern int ata_std_bios_param(struct scsi_device *sdev, 800 struct block_device *bdev, 801 sector_t capacity, int geom[]); 802extern int ata_scsi_slave_config(struct scsi_device *sdev); 803extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 804extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 805 int queue_depth); 806extern struct ata_device *ata_dev_pair(struct ata_device *adev); 807extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev); 808extern u8 ata_irq_on(struct ata_port *ap); 809extern u8 ata_dummy_irq_on(struct ata_port *ap); 810extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); 811extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); 812 813extern int ata_cable_40wire(struct ata_port *ap); 814extern int ata_cable_80wire(struct ata_port *ap); 815extern int ata_cable_sata(struct ata_port *ap); 816extern int ata_cable_unknown(struct ata_port *ap); 817 818/* 819 * Timing helpers 820 */ 821 822extern unsigned int ata_pio_need_iordy(const struct ata_device *); 823extern int ata_timing_compute(struct ata_device *, unsigned short, 824 struct ata_timing *, int, int); 825extern void ata_timing_merge(const struct ata_timing *, 826 const struct ata_timing *, struct ata_timing *, 827 unsigned int); 828 829enum { 830 ATA_TIMING_SETUP = (1 << 0), 831 ATA_TIMING_ACT8B = (1 << 1), 832 ATA_TIMING_REC8B = (1 << 2), 833 ATA_TIMING_CYC8B = (1 << 3), 834 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 835 ATA_TIMING_CYC8B, 836 ATA_TIMING_ACTIVE = (1 << 4), 837 ATA_TIMING_RECOVER = (1 << 5), 838 ATA_TIMING_CYCLE = (1 << 6), 839 ATA_TIMING_UDMA = (1 << 7), 840 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 841 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 842 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 843 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 844}; 845 846 847#ifdef CONFIG_PCI 848struct pci_bits { 849 unsigned int reg; /* PCI config register to read */ 850 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 851 unsigned long mask; 852 unsigned long val; 853}; 854 855extern int ata_pci_init_native_host(struct ata_host *host); 856extern int ata_pci_init_bmdma(struct ata_host *host); 857extern int ata_pci_prepare_native_host(struct pci_dev *pdev, 858 const struct ata_port_info * const * ppi, 859 struct ata_host **r_host); 860extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 861extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); 862#endif /* CONFIG_PCI */ 863 864/* 865 * EH 866 */ 867extern void ata_eng_timeout(struct ata_port *ap); 868 869extern void ata_port_schedule_eh(struct ata_port *ap); 870extern int ata_port_abort(struct ata_port *ap); 871extern int ata_port_freeze(struct ata_port *ap); 872 873extern void ata_eh_freeze_port(struct ata_port *ap); 874extern void ata_eh_thaw_port(struct ata_port *ap); 875 876extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 877extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 878 879extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 880 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 881 ata_postreset_fn_t postreset); 882 883/* 884 * printk helpers 885 */ 886#define ata_port_printk(ap, lv, fmt, args...) \ 887 printk(lv"ata%u: "fmt, (ap)->print_id , ##args) 888 889#define ata_dev_printk(dev, lv, fmt, args...) \ 890 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args) 891 892/* 893 * ata_eh_info helpers 894 */ 895#define ata_ehi_push_desc(ehi, fmt, args...) do { \ 896 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 897 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 898 fmt , ##args); \ 899} while (0) 900 901#define ata_ehi_clear_desc(ehi) do { \ 902 (ehi)->desc[0] = '\0'; \ 903 (ehi)->desc_len = 0; \ 904} while (0) 905 906static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi) 907{ 908 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK; 909 ehi->action |= ATA_EH_SOFTRESET; 910 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 911} 912 913static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 914{ 915 __ata_ehi_hotplugged(ehi); 916 ehi->err_mask |= AC_ERR_ATA_BUS; 917} 918 919/* 920 * qc helpers 921 */ 922static inline int 923ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 924{ 925 if (sg == &qc->pad_sgent) 926 return 1; 927 if (qc->pad_len) 928 return 0; 929 if (((sg - qc->__sg) + 1) == qc->n_elem) 930 return 1; 931 return 0; 932} 933 934static inline struct scatterlist * 935ata_qc_first_sg(struct ata_queued_cmd *qc) 936{ 937 if (qc->n_elem) 938 return qc->__sg; 939 if (qc->pad_len) 940 return &qc->pad_sgent; 941 return NULL; 942} 943 944static inline struct scatterlist * 945ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 946{ 947 if (sg == &qc->pad_sgent) 948 return NULL; 949 if (++sg - qc->__sg < qc->n_elem) 950 return sg; 951 if (qc->pad_len) 952 return &qc->pad_sgent; 953 return NULL; 954} 955 956#define ata_for_each_sg(sg, qc) \ 957 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 958 959static inline unsigned int ata_tag_valid(unsigned int tag) 960{ 961 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 962} 963 964static inline unsigned int ata_tag_internal(unsigned int tag) 965{ 966 return tag == ATA_MAX_QUEUE - 1; 967} 968 969/* 970 * device helpers 971 */ 972static inline unsigned int ata_class_enabled(unsigned int class) 973{ 974 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 975} 976 977static inline unsigned int ata_class_disabled(unsigned int class) 978{ 979 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 980} 981 982static inline unsigned int ata_class_absent(unsigned int class) 983{ 984 return !ata_class_enabled(class) && !ata_class_disabled(class); 985} 986 987static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 988{ 989 return ata_class_enabled(dev->class); 990} 991 992static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 993{ 994 return ata_class_disabled(dev->class); 995} 996 997static inline unsigned int ata_dev_absent(const struct ata_device *dev) 998{ 999 return ata_class_absent(dev->class); 1000} 1001 1002/* 1003 * port helpers 1004 */ 1005static inline int ata_port_max_devices(const struct ata_port *ap) 1006{ 1007 if (ap->flags & ATA_FLAG_SLAVE_POSS) 1008 return 2; 1009 return 1; 1010} 1011 1012 1013static inline u8 ata_chk_status(struct ata_port *ap) 1014{ 1015 return ap->ops->check_status(ap); 1016} 1017 1018/** 1019 * ata_ncq_enabled - Test whether NCQ is enabled 1020 * @dev: ATA device to test for 1021 * 1022 * LOCKING: 1023 * spin_lock_irqsave(host lock) 1024 * 1025 * RETURNS: 1026 * 1 if NCQ is enabled for @dev, 0 otherwise. 1027 */ 1028static inline int ata_ncq_enabled(struct ata_device *dev) 1029{ 1030 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1031 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1032} 1033 1034/** 1035 * ata_pause - Flush writes and pause 400 nanoseconds. 1036 * @ap: Port to wait for. 1037 * 1038 * LOCKING: 1039 * Inherited from caller. 1040 */ 1041 1042static inline void ata_pause(struct ata_port *ap) 1043{ 1044 ata_altstatus(ap); 1045 ndelay(400); 1046} 1047 1048 1049/** 1050 * ata_busy_wait - Wait for a port status register 1051 * @ap: Port to wait for. 1052 * @bits: bits that must be clear 1053 * @max: number of 10uS waits to perform 1054 * 1055 * Waits up to max*10 microseconds for the selected bits in the port's 1056 * status register to be cleared. 1057 * Returns final value of status register. 1058 * 1059 * LOCKING: 1060 * Inherited from caller. 1061 */ 1062 1063static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1064 unsigned int max) 1065{ 1066 u8 status; 1067 1068 do { 1069 udelay(10); 1070 status = ata_chk_status(ap); 1071 max--; 1072 } while (status != 0xff && (status & bits) && (max > 0)); 1073 1074 return status; 1075} 1076 1077 1078/** 1079 * ata_wait_idle - Wait for a port to be idle. 1080 * @ap: Port to wait for. 1081 * 1082 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1083 * Returns final value of status register. 1084 * 1085 * LOCKING: 1086 * Inherited from caller. 1087 */ 1088 1089static inline u8 ata_wait_idle(struct ata_port *ap) 1090{ 1091 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1092 1093 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) { 1094 if (ata_msg_warn(ap)) 1095 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n", 1096 status, ap->ioaddr.status_addr); 1097 } 1098 1099 return status; 1100} 1101 1102static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1103{ 1104 qc->tf.ctl |= ATA_NIEN; 1105} 1106 1107static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1108 unsigned int tag) 1109{ 1110 if (likely(ata_tag_valid(tag))) 1111 return &ap->qcmd[tag]; 1112 return NULL; 1113} 1114 1115static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1116 unsigned int tag) 1117{ 1118 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1119 1120 if (unlikely(!qc) || !ap->ops->error_handler) 1121 return qc; 1122 1123 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1124 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1125 return qc; 1126 1127 return NULL; 1128} 1129 1130static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1131{ 1132 memset(tf, 0, sizeof(*tf)); 1133 1134 tf->ctl = dev->ap->ctl; 1135 if (dev->devno == 0) 1136 tf->device = ATA_DEVICE_OBS; 1137 else 1138 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1139} 1140 1141static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1142{ 1143 qc->dma_dir = DMA_NONE; 1144 qc->__sg = NULL; 1145 qc->flags = 0; 1146 qc->cursg = qc->cursg_ofs = 0; 1147 qc->nbytes = qc->curbytes = 0; 1148 qc->n_elem = 0; 1149 qc->err_mask = 0; 1150 qc->pad_len = 0; 1151 qc->sect_size = ATA_SECT_SIZE; 1152 1153 ata_tf_init(qc->dev, &qc->tf); 1154 1155 /* init result_tf such that it indicates normal completion */ 1156 qc->result_tf.command = ATA_DRDY; 1157 qc->result_tf.feature = 0; 1158} 1159 1160static inline int ata_try_flush_cache(const struct ata_device *dev) 1161{ 1162 return ata_id_wcache_enabled(dev->id) || 1163 ata_id_has_flush(dev->id) || 1164 ata_id_has_flush_ext(dev->id); 1165} 1166 1167static inline unsigned int ac_err_mask(u8 status) 1168{ 1169 if (status & (ATA_BUSY | ATA_DRQ)) 1170 return AC_ERR_HSM; 1171 if (status & (ATA_ERR | ATA_DF)) 1172 return AC_ERR_DEV; 1173 return 0; 1174} 1175 1176static inline unsigned int __ac_err_mask(u8 status) 1177{ 1178 unsigned int mask = ac_err_mask(status); 1179 if (mask == 0) 1180 return AC_ERR_OTHER; 1181 return mask; 1182} 1183 1184static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1185{ 1186 ap->pad_dma = 0; 1187 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1188 &ap->pad_dma, GFP_KERNEL); 1189 return (ap->pad == NULL) ? -ENOMEM : 0; 1190} 1191 1192static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1193{ 1194 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1195} 1196 1197static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1198{ 1199 return *(struct ata_port **)&host->hostdata[0]; 1200} 1201 1202#endif /* __LINUX_LIBATA_H__ */ 1203