libata.h revision 1626aeb881236c8cb022b5e4ca594146a951d669
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_INIT_MASK = (1 << 16) - 1, 144 145 ATA_DFLAG_DETACH = (1 << 16), 146 ATA_DFLAG_DETACHED = (1 << 17), 147 148 ATA_DEV_UNKNOWN = 0, /* unknown device */ 149 ATA_DEV_ATA = 1, /* ATA device */ 150 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 151 ATA_DEV_ATAPI = 3, /* ATAPI device */ 152 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 153 ATA_DEV_NONE = 5, /* no device */ 154 155 /* struct ata_port flags */ 156 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 157 /* (doesn't imply presence) */ 158 ATA_FLAG_SATA = (1 << 1), 159 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 160 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 161 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 162 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 163 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 164 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 165 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 166 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 167 * doesn't handle PIO interrupts */ 168 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 169 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ 170 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H 171 * Register FIS clearing BSY */ 172 ATA_FLAG_DEBUGMSG = (1 << 13), 173 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */ 174 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 175 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 176 177 /* The following flag belongs to ap->pflags but is kept in 178 * ap->flags because it's referenced in many LLDs and will be 179 * removed in not-too-distant future. 180 */ 181 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 182 183 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 184 185 /* struct ata_port pflags */ 186 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 187 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 188 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 189 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 190 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 191 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 192 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 193 194 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */ 195 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 196 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 197 198 /* struct ata_queued_cmd flags */ 199 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 200 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 201 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 202 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 203 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 204 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 205 206 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 207 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 208 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 209 210 /* host set flags */ 211 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 212 ATA_HOST_STARTED = (1 << 1), /* Host started */ 213 214 /* various lengths of time */ 215 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 216 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 217 ATA_TMOUT_INTERNAL = 30 * HZ, 218 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 219 220 /* ATA bus states */ 221 BUS_UNKNOWN = 0, 222 BUS_DMA = 1, 223 BUS_IDLE = 2, 224 BUS_NOINTR = 3, 225 BUS_NODATA = 4, 226 BUS_TIMER = 5, 227 BUS_PIO = 6, 228 BUS_EDD = 7, 229 BUS_IDENTIFY = 8, 230 BUS_PACKET = 9, 231 232 /* SATA port states */ 233 PORT_UNKNOWN = 0, 234 PORT_ENABLED = 1, 235 PORT_DISABLED = 2, 236 237 /* encoding various smaller bitmaps into a single 238 * unsigned int bitmap 239 */ 240 ATA_BITS_PIO = 7, 241 ATA_BITS_MWDMA = 5, 242 ATA_BITS_UDMA = 8, 243 244 ATA_SHIFT_PIO = 0, 245 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, 246 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, 247 248 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, 249 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, 250 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, 251 252 /* size of buffer to pad xfers ending on unaligned boundaries */ 253 ATA_DMA_PAD_SZ = 4, 254 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 255 256 /* ering size */ 257 ATA_ERING_SIZE = 32, 258 259 /* desc_len for ata_eh_info and context */ 260 ATA_EH_DESC_LEN = 80, 261 262 /* reset / recovery action types */ 263 ATA_EH_REVALIDATE = (1 << 0), 264 ATA_EH_SOFTRESET = (1 << 1), 265 ATA_EH_HARDRESET = (1 << 2), 266 267 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 268 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, 269 270 /* ata_eh_info->flags */ 271 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 272 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ 273 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 274 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 275 276 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 277 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 278 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 279 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 280 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 281 282 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 283 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, 284 285 /* max repeat if error condition is still set after ->error_handler */ 286 ATA_EH_MAX_REPEAT = 5, 287 288 /* how hard are we gonna try to probe/recover devices */ 289 ATA_PROBE_MAX_TRIES = 3, 290 ATA_EH_DEV_TRIES = 3, 291 292 /* Horkage types. May be set by libata or controller on drives 293 (some horkage may be drive/controller pair dependant */ 294 295 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 296 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 297 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 298 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 299 ATA_HORKAGE_DMA_RW_ONLY = (1 << 4), /* ATAPI DMA for RW only */ 300}; 301 302enum hsm_task_states { 303 HSM_ST_IDLE, /* no command on going */ 304 HSM_ST_FIRST, /* (waiting the device to) 305 write CDB or first data block */ 306 HSM_ST, /* (waiting the device to) transfer data */ 307 HSM_ST_LAST, /* (waiting the device to) complete command */ 308 HSM_ST_ERR, /* error */ 309}; 310 311enum ata_completion_errors { 312 AC_ERR_DEV = (1 << 0), /* device reported error */ 313 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 314 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 315 AC_ERR_MEDIA = (1 << 3), /* media error */ 316 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 317 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 318 AC_ERR_SYSTEM = (1 << 6), /* system error */ 319 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 320 AC_ERR_OTHER = (1 << 8), /* unknown */ 321 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 322}; 323 324/* forward declarations */ 325struct scsi_device; 326struct ata_port_operations; 327struct ata_port; 328struct ata_queued_cmd; 329 330/* typedefs */ 331typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 332typedef int (*ata_prereset_fn_t)(struct ata_port *ap, unsigned long deadline); 333typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes, 334 unsigned long deadline); 335typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 336 337struct ata_ioports { 338 void __iomem *cmd_addr; 339 void __iomem *data_addr; 340 void __iomem *error_addr; 341 void __iomem *feature_addr; 342 void __iomem *nsect_addr; 343 void __iomem *lbal_addr; 344 void __iomem *lbam_addr; 345 void __iomem *lbah_addr; 346 void __iomem *device_addr; 347 void __iomem *status_addr; 348 void __iomem *command_addr; 349 void __iomem *altstatus_addr; 350 void __iomem *ctl_addr; 351 void __iomem *bmdma_addr; 352 void __iomem *scr_addr; 353}; 354 355struct ata_host { 356 spinlock_t lock; 357 struct device *dev; 358 unsigned long irq; 359 unsigned long irq2; 360 void __iomem * const *iomap; 361 unsigned int n_ports; 362 void *private_data; 363 const struct ata_port_operations *ops; 364 unsigned long flags; 365 struct ata_port *simplex_claimed; /* channel owning the DMA */ 366 struct ata_port *ports[0]; 367}; 368 369struct ata_queued_cmd { 370 struct ata_port *ap; 371 struct ata_device *dev; 372 373 struct scsi_cmnd *scsicmd; 374 void (*scsidone)(struct scsi_cmnd *); 375 376 struct ata_taskfile tf; 377 u8 cdb[ATAPI_CDB_LEN]; 378 379 unsigned long flags; /* ATA_QCFLAG_xxx */ 380 unsigned int tag; 381 unsigned int n_elem; 382 unsigned int orig_n_elem; 383 384 int dma_dir; 385 386 unsigned int pad_len; 387 unsigned int sect_size; 388 389 unsigned int nbytes; 390 unsigned int curbytes; 391 392 unsigned int cursg; 393 unsigned int cursg_ofs; 394 395 struct scatterlist sgent; 396 struct scatterlist pad_sgent; 397 void *buf_virt; 398 399 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 400 struct scatterlist *__sg; 401 402 unsigned int err_mask; 403 struct ata_taskfile result_tf; 404 ata_qc_cb_t complete_fn; 405 406 void *private_data; 407}; 408 409struct ata_port_stats { 410 unsigned long unhandled_irq; 411 unsigned long idle_irq; 412 unsigned long rw_reqbuf; 413}; 414 415struct ata_ering_entry { 416 int is_io; 417 unsigned int err_mask; 418 u64 timestamp; 419}; 420 421struct ata_ering { 422 int cursor; 423 struct ata_ering_entry ring[ATA_ERING_SIZE]; 424}; 425 426struct ata_device { 427 struct ata_port *ap; 428 unsigned int devno; /* 0 or 1 */ 429 unsigned long flags; /* ATA_DFLAG_xxx */ 430 struct scsi_device *sdev; /* attached SCSI device */ 431 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 432 u64 n_sectors; /* size of device, if ATA */ 433 u64 n_sectors_boot; /* size of ATA device at startup */ 434 unsigned int class; /* ATA_DEV_xxx */ 435 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 436 u8 pio_mode; 437 u8 dma_mode; 438 u8 xfer_mode; 439 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 440 441 unsigned int multi_count; /* sectors count for 442 READ/WRITE MULTIPLE */ 443 unsigned int max_sectors; /* per-device max sectors */ 444 unsigned int cdb_len; 445 446 /* per-dev xfer mask */ 447 unsigned int pio_mask; 448 unsigned int mwdma_mask; 449 unsigned int udma_mask; 450 451 /* for CHS addressing */ 452 u16 cylinders; /* Number of cylinders */ 453 u16 heads; /* Number of heads */ 454 u16 sectors; /* Number of sectors per track */ 455 456 /* error history */ 457 struct ata_ering ering; 458 int spdn_cnt; 459 unsigned int horkage; /* List of broken features */ 460#ifdef CONFIG_SATA_ACPI 461 /* ACPI objects info */ 462 acpi_handle obj_handle; 463#endif 464}; 465 466/* Offset into struct ata_device. Fields above it are maintained 467 * acress device init. Fields below are zeroed. 468 */ 469#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 470 471struct ata_eh_info { 472 struct ata_device *dev; /* offending device */ 473 u32 serror; /* SError from LLDD */ 474 unsigned int err_mask; /* port-wide err_mask */ 475 unsigned int action; /* ATA_EH_* action mask */ 476 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 477 unsigned int flags; /* ATA_EHI_* flags */ 478 479 unsigned int probe_mask; 480 481 char desc[ATA_EH_DESC_LEN]; 482 int desc_len; 483}; 484 485struct ata_eh_context { 486 struct ata_eh_info i; 487 int tries[ATA_MAX_DEVICES]; 488 unsigned int classes[ATA_MAX_DEVICES]; 489 unsigned int did_probe_mask; 490}; 491 492struct ata_port { 493 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 494 const struct ata_port_operations *ops; 495 spinlock_t *lock; 496 unsigned long flags; /* ATA_FLAG_xxx */ 497 unsigned int pflags; /* ATA_PFLAG_xxx */ 498 unsigned int print_id; /* user visible unique port ID */ 499 unsigned int port_no; /* 0 based port no. inside the host */ 500 501 struct ata_prd *prd; /* our SG list */ 502 dma_addr_t prd_dma; /* and its DMA mapping */ 503 504 void *pad; /* array of DMA pad buffers */ 505 dma_addr_t pad_dma; 506 507 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 508 509 u8 ctl; /* cache of ATA control register */ 510 u8 last_ctl; /* Cache last written value */ 511 unsigned int pio_mask; 512 unsigned int mwdma_mask; 513 unsigned int udma_mask; 514 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 515 unsigned int hw_sata_spd_limit; 516 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 517 518 /* record runtime error info, protected by host lock */ 519 struct ata_eh_info eh_info; 520 /* EH context owned by EH */ 521 struct ata_eh_context eh_context; 522 523 struct ata_device device[ATA_MAX_DEVICES]; 524 525 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 526 unsigned long qc_allocated; 527 unsigned int qc_active; 528 529 unsigned int active_tag; 530 u32 sactive; 531 532 struct ata_port_stats stats; 533 struct ata_host *host; 534 struct device *dev; 535 536 void *port_task_data; 537 struct delayed_work port_task; 538 struct delayed_work hotplug_task; 539 struct work_struct scsi_rescan_task; 540 541 unsigned int hsm_task_state; 542 543 u32 msg_enable; 544 struct list_head eh_done_q; 545 wait_queue_head_t eh_wait_q; 546 547 pm_message_t pm_mesg; 548 int *pm_result; 549 550 void *private_data; 551 552 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 553}; 554 555struct ata_port_operations { 556 void (*port_disable) (struct ata_port *); 557 558 void (*dev_config) (struct ata_device *); 559 560 void (*set_piomode) (struct ata_port *, struct ata_device *); 561 void (*set_dmamode) (struct ata_port *, struct ata_device *); 562 unsigned long (*mode_filter) (struct ata_device *, unsigned long); 563 564 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 565 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 566 567 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 568 u8 (*check_status)(struct ata_port *ap); 569 u8 (*check_altstatus)(struct ata_port *ap); 570 void (*dev_select)(struct ata_port *ap, unsigned int device); 571 572 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 573 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev); 574 575 void (*post_set_mode) (struct ata_port *ap); 576 577 int (*cable_detect) (struct ata_port *ap); 578 579 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 580 581 void (*bmdma_setup) (struct ata_queued_cmd *qc); 582 void (*bmdma_start) (struct ata_queued_cmd *qc); 583 584 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 585 586 void (*qc_prep) (struct ata_queued_cmd *qc); 587 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 588 589 /* Error handlers. ->error_handler overrides ->eng_timeout and 590 * indicates that new-style EH is in place. 591 */ 592 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 593 594 void (*freeze) (struct ata_port *ap); 595 void (*thaw) (struct ata_port *ap); 596 void (*error_handler) (struct ata_port *ap); 597 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 598 599 irq_handler_t irq_handler; 600 void (*irq_clear) (struct ata_port *); 601 u8 (*irq_on) (struct ata_port *); 602 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq); 603 604 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 605 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 606 u32 val); 607 608 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 609 int (*port_resume) (struct ata_port *ap); 610 611 int (*port_start) (struct ata_port *ap); 612 void (*port_stop) (struct ata_port *ap); 613 614 void (*host_stop) (struct ata_host *host); 615 616 void (*bmdma_stop) (struct ata_queued_cmd *qc); 617 u8 (*bmdma_status) (struct ata_port *ap); 618}; 619 620struct ata_port_info { 621 struct scsi_host_template *sht; 622 unsigned long flags; 623 unsigned long pio_mask; 624 unsigned long mwdma_mask; 625 unsigned long udma_mask; 626 const struct ata_port_operations *port_ops; 627 irq_handler_t irq_handler; 628 void *private_data; 629}; 630 631struct ata_timing { 632 unsigned short mode; /* ATA mode */ 633 unsigned short setup; /* t1 */ 634 unsigned short act8b; /* t2 for 8-bit I/O */ 635 unsigned short rec8b; /* t2i for 8-bit I/O */ 636 unsigned short cyc8b; /* t0 for 8-bit I/O */ 637 unsigned short active; /* t2 or tD */ 638 unsigned short recover; /* t2i or tK */ 639 unsigned short cycle; /* t0 */ 640 unsigned short udma; /* t2CYCTYP/2 */ 641}; 642 643#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 644 645extern const unsigned long sata_deb_timing_normal[]; 646extern const unsigned long sata_deb_timing_hotplug[]; 647extern const unsigned long sata_deb_timing_long[]; 648 649extern const struct ata_port_operations ata_dummy_port_ops; 650extern const struct ata_port_info ata_dummy_port_info; 651 652static inline const unsigned long * 653sata_ehc_deb_timing(struct ata_eh_context *ehc) 654{ 655 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 656 return sata_deb_timing_hotplug; 657 else 658 return sata_deb_timing_normal; 659} 660 661static inline int ata_port_is_dummy(struct ata_port *ap) 662{ 663 return ap->ops == &ata_dummy_port_ops; 664} 665 666extern void sata_print_link_status(struct ata_port *ap); 667extern void ata_port_probe(struct ata_port *); 668extern void __sata_phy_reset(struct ata_port *ap); 669extern void sata_phy_reset(struct ata_port *ap); 670extern void ata_bus_reset(struct ata_port *ap); 671extern int sata_set_spd(struct ata_port *ap); 672extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param, 673 unsigned long deadline); 674extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param, 675 unsigned long deadline); 676extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline); 677extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes, 678 unsigned long deadline); 679extern int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing, 680 unsigned long deadline); 681extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class, 682 unsigned long deadline); 683extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 684extern void ata_port_disable(struct ata_port *); 685extern void ata_std_ports(struct ata_ioports *ioaddr); 686#ifdef CONFIG_PCI 687extern int ata_pci_init_one (struct pci_dev *pdev, 688 const struct ata_port_info * const * ppi); 689extern void ata_pci_remove_one (struct pci_dev *pdev); 690#ifdef CONFIG_PM 691extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 692extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 693extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 694extern int ata_pci_device_resume(struct pci_dev *pdev); 695#endif 696extern int ata_pci_clear_simplex(struct pci_dev *pdev); 697#endif /* CONFIG_PCI */ 698extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 699extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 700 const struct ata_port_info * const * ppi, int n_ports); 701extern int ata_host_start(struct ata_host *host); 702extern int ata_host_register(struct ata_host *host, 703 struct scsi_host_template *sht); 704extern int ata_host_activate(struct ata_host *host, int irq, 705 irq_handler_t irq_handler, unsigned long irq_flags, 706 struct scsi_host_template *sht); 707extern void ata_host_detach(struct ata_host *host); 708extern void ata_host_init(struct ata_host *, struct device *, 709 unsigned long, const struct ata_port_operations *); 710extern int ata_scsi_detect(struct scsi_host_template *sht); 711extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 712extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 713extern void ata_sas_port_destroy(struct ata_port *); 714extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 715 struct ata_port_info *, struct Scsi_Host *); 716extern int ata_sas_port_init(struct ata_port *); 717extern int ata_sas_port_start(struct ata_port *ap); 718extern void ata_sas_port_stop(struct ata_port *ap); 719extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 720extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 721 struct ata_port *ap); 722extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 723extern int sata_scr_valid(struct ata_port *ap); 724extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 725extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 726extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 727extern int ata_port_online(struct ata_port *ap); 728extern int ata_port_offline(struct ata_port *ap); 729#ifdef CONFIG_PM 730extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 731extern void ata_host_resume(struct ata_host *host); 732#endif 733extern int ata_ratelimit(void); 734extern int ata_busy_sleep(struct ata_port *ap, 735 unsigned long timeout_pat, unsigned long timeout); 736extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline); 737extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 738 void *data, unsigned long delay); 739extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 740 unsigned long interval_msec, 741 unsigned long timeout_msec); 742extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *); 743 744/* 745 * Default driver ops implementations 746 */ 747extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 748extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 749extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 750extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 751extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 752extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 753extern u8 ata_check_status(struct ata_port *ap); 754extern u8 ata_altstatus(struct ata_port *ap); 755extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 756extern int ata_port_start (struct ata_port *ap); 757extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 758extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 759 unsigned int buflen, int write_data); 760extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 761 unsigned int buflen, int write_data); 762extern void ata_qc_prep(struct ata_queued_cmd *qc); 763extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 764extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 765extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 766 unsigned int buflen); 767extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 768 unsigned int n_elem); 769extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 770extern void ata_dev_disable(struct ata_device *adev); 771extern void ata_id_string(const u16 *id, unsigned char *s, 772 unsigned int ofs, unsigned int len); 773extern void ata_id_c_string(const u16 *id, unsigned char *s, 774 unsigned int ofs, unsigned int len); 775extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); 776extern unsigned long ata_device_blacklisted(const struct ata_device *dev); 777extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 778extern void ata_bmdma_start (struct ata_queued_cmd *qc); 779extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 780extern u8 ata_bmdma_status(struct ata_port *ap); 781extern void ata_bmdma_irq_clear(struct ata_port *ap); 782extern void ata_bmdma_freeze(struct ata_port *ap); 783extern void ata_bmdma_thaw(struct ata_port *ap); 784extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 785 ata_reset_fn_t softreset, 786 ata_reset_fn_t hardreset, 787 ata_postreset_fn_t postreset); 788extern void ata_bmdma_error_handler(struct ata_port *ap); 789extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 790extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 791 u8 status, int in_wq); 792extern void ata_qc_complete(struct ata_queued_cmd *qc); 793extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 794 void (*finish_qc)(struct ata_queued_cmd *)); 795extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 796 void (*done)(struct scsi_cmnd *)); 797extern int ata_std_bios_param(struct scsi_device *sdev, 798 struct block_device *bdev, 799 sector_t capacity, int geom[]); 800extern int ata_scsi_slave_config(struct scsi_device *sdev); 801extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 802extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 803 int queue_depth); 804extern struct ata_device *ata_dev_pair(struct ata_device *adev); 805extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev); 806extern u8 ata_irq_on(struct ata_port *ap); 807extern u8 ata_dummy_irq_on(struct ata_port *ap); 808extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); 809extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); 810 811extern int ata_cable_40wire(struct ata_port *ap); 812extern int ata_cable_80wire(struct ata_port *ap); 813extern int ata_cable_sata(struct ata_port *ap); 814extern int ata_cable_unknown(struct ata_port *ap); 815 816/* 817 * Timing helpers 818 */ 819 820extern unsigned int ata_pio_need_iordy(const struct ata_device *); 821extern int ata_timing_compute(struct ata_device *, unsigned short, 822 struct ata_timing *, int, int); 823extern void ata_timing_merge(const struct ata_timing *, 824 const struct ata_timing *, struct ata_timing *, 825 unsigned int); 826 827enum { 828 ATA_TIMING_SETUP = (1 << 0), 829 ATA_TIMING_ACT8B = (1 << 1), 830 ATA_TIMING_REC8B = (1 << 2), 831 ATA_TIMING_CYC8B = (1 << 3), 832 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 833 ATA_TIMING_CYC8B, 834 ATA_TIMING_ACTIVE = (1 << 4), 835 ATA_TIMING_RECOVER = (1 << 5), 836 ATA_TIMING_CYCLE = (1 << 6), 837 ATA_TIMING_UDMA = (1 << 7), 838 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 839 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 840 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 841 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 842}; 843 844 845#ifdef CONFIG_PCI 846struct pci_bits { 847 unsigned int reg; /* PCI config register to read */ 848 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 849 unsigned long mask; 850 unsigned long val; 851}; 852 853extern int ata_pci_init_native_host(struct ata_host *host); 854extern int ata_pci_init_bmdma(struct ata_host *host); 855extern int ata_pci_prepare_native_host(struct pci_dev *pdev, 856 const struct ata_port_info * const * ppi, 857 struct ata_host **r_host); 858extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 859extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); 860#endif /* CONFIG_PCI */ 861 862/* 863 * EH 864 */ 865extern void ata_eng_timeout(struct ata_port *ap); 866 867extern void ata_port_schedule_eh(struct ata_port *ap); 868extern int ata_port_abort(struct ata_port *ap); 869extern int ata_port_freeze(struct ata_port *ap); 870 871extern void ata_eh_freeze_port(struct ata_port *ap); 872extern void ata_eh_thaw_port(struct ata_port *ap); 873 874extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 875extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 876 877extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 878 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 879 ata_postreset_fn_t postreset); 880 881/* 882 * printk helpers 883 */ 884#define ata_port_printk(ap, lv, fmt, args...) \ 885 printk(lv"ata%u: "fmt, (ap)->print_id , ##args) 886 887#define ata_dev_printk(dev, lv, fmt, args...) \ 888 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args) 889 890/* 891 * ata_eh_info helpers 892 */ 893#define ata_ehi_push_desc(ehi, fmt, args...) do { \ 894 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 895 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 896 fmt , ##args); \ 897} while (0) 898 899#define ata_ehi_clear_desc(ehi) do { \ 900 (ehi)->desc[0] = '\0'; \ 901 (ehi)->desc_len = 0; \ 902} while (0) 903 904static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi) 905{ 906 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK; 907 ehi->action |= ATA_EH_SOFTRESET; 908 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 909} 910 911static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 912{ 913 __ata_ehi_hotplugged(ehi); 914 ehi->err_mask |= AC_ERR_ATA_BUS; 915} 916 917/* 918 * qc helpers 919 */ 920static inline int 921ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 922{ 923 if (sg == &qc->pad_sgent) 924 return 1; 925 if (qc->pad_len) 926 return 0; 927 if (((sg - qc->__sg) + 1) == qc->n_elem) 928 return 1; 929 return 0; 930} 931 932static inline struct scatterlist * 933ata_qc_first_sg(struct ata_queued_cmd *qc) 934{ 935 if (qc->n_elem) 936 return qc->__sg; 937 if (qc->pad_len) 938 return &qc->pad_sgent; 939 return NULL; 940} 941 942static inline struct scatterlist * 943ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 944{ 945 if (sg == &qc->pad_sgent) 946 return NULL; 947 if (++sg - qc->__sg < qc->n_elem) 948 return sg; 949 if (qc->pad_len) 950 return &qc->pad_sgent; 951 return NULL; 952} 953 954#define ata_for_each_sg(sg, qc) \ 955 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 956 957static inline unsigned int ata_tag_valid(unsigned int tag) 958{ 959 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 960} 961 962static inline unsigned int ata_tag_internal(unsigned int tag) 963{ 964 return tag == ATA_MAX_QUEUE - 1; 965} 966 967/* 968 * device helpers 969 */ 970static inline unsigned int ata_class_enabled(unsigned int class) 971{ 972 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 973} 974 975static inline unsigned int ata_class_disabled(unsigned int class) 976{ 977 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 978} 979 980static inline unsigned int ata_class_absent(unsigned int class) 981{ 982 return !ata_class_enabled(class) && !ata_class_disabled(class); 983} 984 985static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 986{ 987 return ata_class_enabled(dev->class); 988} 989 990static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 991{ 992 return ata_class_disabled(dev->class); 993} 994 995static inline unsigned int ata_dev_absent(const struct ata_device *dev) 996{ 997 return ata_class_absent(dev->class); 998} 999 1000/* 1001 * port helpers 1002 */ 1003static inline int ata_port_max_devices(const struct ata_port *ap) 1004{ 1005 if (ap->flags & ATA_FLAG_SLAVE_POSS) 1006 return 2; 1007 return 1; 1008} 1009 1010 1011static inline u8 ata_chk_status(struct ata_port *ap) 1012{ 1013 return ap->ops->check_status(ap); 1014} 1015 1016/** 1017 * ata_ncq_enabled - Test whether NCQ is enabled 1018 * @dev: ATA device to test for 1019 * 1020 * LOCKING: 1021 * spin_lock_irqsave(host lock) 1022 * 1023 * RETURNS: 1024 * 1 if NCQ is enabled for @dev, 0 otherwise. 1025 */ 1026static inline int ata_ncq_enabled(struct ata_device *dev) 1027{ 1028 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1029 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1030} 1031 1032/** 1033 * ata_pause - Flush writes and pause 400 nanoseconds. 1034 * @ap: Port to wait for. 1035 * 1036 * LOCKING: 1037 * Inherited from caller. 1038 */ 1039 1040static inline void ata_pause(struct ata_port *ap) 1041{ 1042 ata_altstatus(ap); 1043 ndelay(400); 1044} 1045 1046 1047/** 1048 * ata_busy_wait - Wait for a port status register 1049 * @ap: Port to wait for. 1050 * @bits: bits that must be clear 1051 * @max: number of 10uS waits to perform 1052 * 1053 * Waits up to max*10 microseconds for the selected bits in the port's 1054 * status register to be cleared. 1055 * Returns final value of status register. 1056 * 1057 * LOCKING: 1058 * Inherited from caller. 1059 */ 1060 1061static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1062 unsigned int max) 1063{ 1064 u8 status; 1065 1066 do { 1067 udelay(10); 1068 status = ata_chk_status(ap); 1069 max--; 1070 } while (status != 0xff && (status & bits) && (max > 0)); 1071 1072 return status; 1073} 1074 1075 1076/** 1077 * ata_wait_idle - Wait for a port to be idle. 1078 * @ap: Port to wait for. 1079 * 1080 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1081 * Returns final value of status register. 1082 * 1083 * LOCKING: 1084 * Inherited from caller. 1085 */ 1086 1087static inline u8 ata_wait_idle(struct ata_port *ap) 1088{ 1089 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1090 1091 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) { 1092 if (ata_msg_warn(ap)) 1093 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n", 1094 status, ap->ioaddr.status_addr); 1095 } 1096 1097 return status; 1098} 1099 1100static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1101{ 1102 qc->tf.ctl |= ATA_NIEN; 1103} 1104 1105static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1106 unsigned int tag) 1107{ 1108 if (likely(ata_tag_valid(tag))) 1109 return &ap->qcmd[tag]; 1110 return NULL; 1111} 1112 1113static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1114 unsigned int tag) 1115{ 1116 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1117 1118 if (unlikely(!qc) || !ap->ops->error_handler) 1119 return qc; 1120 1121 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1122 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1123 return qc; 1124 1125 return NULL; 1126} 1127 1128static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1129{ 1130 memset(tf, 0, sizeof(*tf)); 1131 1132 tf->ctl = dev->ap->ctl; 1133 if (dev->devno == 0) 1134 tf->device = ATA_DEVICE_OBS; 1135 else 1136 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1137} 1138 1139static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1140{ 1141 qc->dma_dir = DMA_NONE; 1142 qc->__sg = NULL; 1143 qc->flags = 0; 1144 qc->cursg = qc->cursg_ofs = 0; 1145 qc->nbytes = qc->curbytes = 0; 1146 qc->n_elem = 0; 1147 qc->err_mask = 0; 1148 qc->pad_len = 0; 1149 qc->sect_size = ATA_SECT_SIZE; 1150 1151 ata_tf_init(qc->dev, &qc->tf); 1152 1153 /* init result_tf such that it indicates normal completion */ 1154 qc->result_tf.command = ATA_DRDY; 1155 qc->result_tf.feature = 0; 1156} 1157 1158static inline int ata_try_flush_cache(const struct ata_device *dev) 1159{ 1160 return ata_id_wcache_enabled(dev->id) || 1161 ata_id_has_flush(dev->id) || 1162 ata_id_has_flush_ext(dev->id); 1163} 1164 1165static inline unsigned int ac_err_mask(u8 status) 1166{ 1167 if (status & (ATA_BUSY | ATA_DRQ)) 1168 return AC_ERR_HSM; 1169 if (status & (ATA_ERR | ATA_DF)) 1170 return AC_ERR_DEV; 1171 return 0; 1172} 1173 1174static inline unsigned int __ac_err_mask(u8 status) 1175{ 1176 unsigned int mask = ac_err_mask(status); 1177 if (mask == 0) 1178 return AC_ERR_OTHER; 1179 return mask; 1180} 1181 1182static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1183{ 1184 ap->pad_dma = 0; 1185 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1186 &ap->pad_dma, GFP_KERNEL); 1187 return (ap->pad == NULL) ? -ENOMEM : 0; 1188} 1189 1190static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1191{ 1192 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1193} 1194 1195static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1196{ 1197 return *(struct ata_port **)&host->hostdata[0]; 1198} 1199 1200#endif /* __LINUX_LIBATA_H__ */ 1201