libata.h revision 7a801184fa480e11e6431f184a5bdf31f63326fb
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 <asm/io.h> 35#include <linux/ata.h> 36#include <linux/workqueue.h> 37#include <scsi/scsi_host.h> 38 39/* 40 * Define if arch has non-standard setup. This is a _PCI_ standard 41 * not a legacy or ISA standard. 42 */ 43#ifdef CONFIG_ATA_NONSTANDARD 44#include <asm/libata-portmap.h> 45#else 46#include <asm-generic/libata-portmap.h> 47#endif 48 49/* 50 * compile-time options: to be removed as soon as all the drivers are 51 * converted to the new debugging mechanism 52 */ 53#undef ATA_DEBUG /* debugging output */ 54#undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 55#undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 56#undef ATA_NDEBUG /* define to disable quick runtime checks */ 57#define ATA_ENABLE_PATA /* define to enable PATA support in some 58 * low-level drivers */ 59 60 61/* note: prints function name for you */ 62#ifdef ATA_DEBUG 63#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 64#ifdef ATA_VERBOSE_DEBUG 65#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 66#else 67#define VPRINTK(fmt, args...) 68#endif /* ATA_VERBOSE_DEBUG */ 69#else 70#define DPRINTK(fmt, args...) 71#define VPRINTK(fmt, args...) 72#endif /* ATA_DEBUG */ 73 74#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 75 76/* NEW: debug levels */ 77#define HAVE_LIBATA_MSG 1 78 79enum { 80 ATA_MSG_DRV = 0x0001, 81 ATA_MSG_INFO = 0x0002, 82 ATA_MSG_PROBE = 0x0004, 83 ATA_MSG_WARN = 0x0008, 84 ATA_MSG_MALLOC = 0x0010, 85 ATA_MSG_CTL = 0x0020, 86 ATA_MSG_INTR = 0x0040, 87 ATA_MSG_ERR = 0x0080, 88}; 89 90#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 91#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 92#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 93#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 94#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 95#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 96#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 97#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 98 99static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 100{ 101 if (dval < 0 || dval >= (sizeof(u32) * 8)) 102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 103 if (!dval) 104 return 0; 105 return (1 << dval) - 1; 106} 107 108/* defines only for the constants which don't work well as enums */ 109#define ATA_TAG_POISON 0xfafbfcfdU 110 111/* move to PCI layer? */ 112#define PCI_VDEVICE(vendor, device) \ 113 PCI_VENDOR_ID_##vendor, (device), \ 114 PCI_ANY_ID, PCI_ANY_ID, 0, 0 115 116static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) 117{ 118 return &pdev->dev; 119} 120 121enum { 122 /* various global constants */ 123 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 124 ATA_MAX_PORTS = 8, 125 ATA_DEF_QUEUE = 1, 126 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 127 ATA_MAX_QUEUE = 32, 128 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 129 ATA_MAX_BUS = 2, 130 ATA_DEF_BUSY_WAIT = 10000, 131 ATA_SHORT_PAUSE = (HZ >> 6) + 1, 132 133 ATA_SHT_EMULATED = 1, 134 ATA_SHT_CMD_PER_LUN = 1, 135 ATA_SHT_THIS_ID = -1, 136 ATA_SHT_USE_CLUSTERING = 1, 137 138 /* struct ata_device stuff */ 139 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 140 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 141 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 142 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 143 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 144 ATA_DFLAG_CFG_MASK = (1 << 8) - 1, 145 146 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */ 147 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */ 148 ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */ 149 ATA_DFLAG_INIT_MASK = (1 << 16) - 1, 150 151 ATA_DFLAG_DETACH = (1 << 16), 152 ATA_DFLAG_DETACHED = (1 << 17), 153 154 ATA_DEV_UNKNOWN = 0, /* unknown device */ 155 ATA_DEV_ATA = 1, /* ATA device */ 156 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 157 ATA_DEV_ATAPI = 3, /* ATAPI device */ 158 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 159 ATA_DEV_NONE = 5, /* no device */ 160 161 /* struct ata_port flags */ 162 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 163 /* (doesn't imply presence) */ 164 ATA_FLAG_SATA = (1 << 1), 165 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 166 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 167 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 168 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 169 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 170 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 171 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 172 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 173 * doesn't handle PIO interrupts */ 174 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 175 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ 176 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H 177 * Register FIS clearing BSY */ 178 ATA_FLAG_DEBUGMSG = (1 << 13), 179 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */ 180 181 /* The following flag belongs to ap->pflags but is kept in 182 * ap->flags because it's referenced in many LLDs and will be 183 * removed in not-too-distant future. 184 */ 185 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 186 187 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 188 189 /* struct ata_port pflags */ 190 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 191 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 192 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 193 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 194 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 195 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 196 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 197 198 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */ 199 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 200 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 201 202 /* struct ata_queued_cmd flags */ 203 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 204 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 205 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 206 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 207 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 208 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 209 210 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 211 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 212 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 213 214 /* host set flags */ 215 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 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 /* masks for port functions */ 260 ATA_PORT_PRIMARY = (1 << 0), 261 ATA_PORT_SECONDARY = (1 << 1), 262 263 /* ering size */ 264 ATA_ERING_SIZE = 32, 265 266 /* desc_len for ata_eh_info and context */ 267 ATA_EH_DESC_LEN = 80, 268 269 /* reset / recovery action types */ 270 ATA_EH_REVALIDATE = (1 << 0), 271 ATA_EH_SOFTRESET = (1 << 1), 272 ATA_EH_HARDRESET = (1 << 2), 273 ATA_EH_SUSPEND = (1 << 3), 274 ATA_EH_RESUME = (1 << 4), 275 ATA_EH_PM_FREEZE = (1 << 5), 276 277 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 278 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND | 279 ATA_EH_RESUME | ATA_EH_PM_FREEZE, 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_RESET = (1 << 16), /* already reset this port */ 288 ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */ 289 ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */ 290 ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */ 291 292 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, 293 294 /* max repeat if error condition is still set after ->error_handler */ 295 ATA_EH_MAX_REPEAT = 5, 296 297 /* how hard are we gonna try to probe/recover devices */ 298 ATA_PROBE_MAX_TRIES = 3, 299 ATA_EH_RESET_TRIES = 3, 300 ATA_EH_DEV_TRIES = 3, 301 302 /* Drive spinup time (time from power-on to the first D2H FIS) 303 * in msecs - 8s currently. Failing to get ready in this time 304 * isn't critical. It will result in reset failure for 305 * controllers which can't wait for the first D2H FIS. libata 306 * will retry, so it just has to be long enough to spin up 307 * most devices. 308 */ 309 ATA_SPINUP_WAIT = 8000, 310 311 /* Horkage types. May be set by libata or controller on drives 312 (some horkage may be drive/controller pair dependant */ 313 314 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 315 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 316 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 317}; 318 319enum hsm_task_states { 320 HSM_ST_IDLE, /* no command on going */ 321 HSM_ST, /* (waiting the device to) transfer data */ 322 HSM_ST_LAST, /* (waiting the device to) complete command */ 323 HSM_ST_ERR, /* error */ 324 HSM_ST_FIRST, /* (waiting the device to) 325 write CDB or first data block */ 326}; 327 328enum ata_completion_errors { 329 AC_ERR_DEV = (1 << 0), /* device reported error */ 330 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 331 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 332 AC_ERR_MEDIA = (1 << 3), /* media error */ 333 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 334 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 335 AC_ERR_SYSTEM = (1 << 6), /* system error */ 336 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 337 AC_ERR_OTHER = (1 << 8), /* unknown */ 338 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 339}; 340 341/* forward declarations */ 342struct scsi_device; 343struct ata_port_operations; 344struct ata_port; 345struct ata_queued_cmd; 346 347/* typedefs */ 348typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 349typedef int (*ata_prereset_fn_t)(struct ata_port *ap); 350typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes); 351typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 352 353struct ata_ioports { 354 unsigned long cmd_addr; 355 unsigned long data_addr; 356 unsigned long error_addr; 357 unsigned long feature_addr; 358 unsigned long nsect_addr; 359 unsigned long lbal_addr; 360 unsigned long lbam_addr; 361 unsigned long lbah_addr; 362 unsigned long device_addr; 363 unsigned long status_addr; 364 unsigned long command_addr; 365 unsigned long altstatus_addr; 366 unsigned long ctl_addr; 367 unsigned long bmdma_addr; 368 unsigned long scr_addr; 369}; 370 371struct ata_probe_ent { 372 struct list_head node; 373 struct device *dev; 374 const struct ata_port_operations *port_ops; 375 struct scsi_host_template *sht; 376 struct ata_ioports port[ATA_MAX_PORTS]; 377 unsigned int n_ports; 378 unsigned int dummy_port_mask; 379 unsigned int pio_mask; 380 unsigned int mwdma_mask; 381 unsigned int udma_mask; 382 unsigned long irq; 383 unsigned long irq2; 384 unsigned int irq_flags; 385 unsigned long port_flags; 386 unsigned long _host_flags; 387 void __iomem *mmio_base; 388 void *private_data; 389 390 /* port_info for the secondary port. Together with irq2, it's 391 * used to implement non-uniform secondary port. Currently, 392 * the only user is ata_piix combined mode. This workaround 393 * will be removed together with ata_probe_ent when init model 394 * is updated. 395 */ 396 const struct ata_port_info *pinfo2; 397}; 398 399struct ata_host { 400 spinlock_t lock; 401 struct device *dev; 402 unsigned long irq; 403 unsigned long irq2; 404 void __iomem *mmio_base; 405 unsigned int n_ports; 406 void *private_data; 407 const struct ata_port_operations *ops; 408 unsigned long flags; 409 int simplex_claimed; /* Keep seperate in case we 410 ever need to do this locked */ 411 struct ata_port *ports[0]; 412}; 413 414struct ata_queued_cmd { 415 struct ata_port *ap; 416 struct ata_device *dev; 417 418 struct scsi_cmnd *scsicmd; 419 void (*scsidone)(struct scsi_cmnd *); 420 421 struct ata_taskfile tf; 422 u8 cdb[ATAPI_CDB_LEN]; 423 424 unsigned long flags; /* ATA_QCFLAG_xxx */ 425 unsigned int tag; 426 unsigned int n_elem; 427 unsigned int orig_n_elem; 428 429 int dma_dir; 430 431 unsigned int pad_len; 432 433 unsigned int nsect; 434 unsigned int cursect; 435 436 unsigned int nbytes; 437 unsigned int curbytes; 438 439 unsigned int cursg; 440 unsigned int cursg_ofs; 441 442 struct scatterlist sgent; 443 struct scatterlist pad_sgent; 444 void *buf_virt; 445 446 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 447 struct scatterlist *__sg; 448 449 unsigned int err_mask; 450 struct ata_taskfile result_tf; 451 ata_qc_cb_t complete_fn; 452 453 void *private_data; 454}; 455 456struct ata_port_stats { 457 unsigned long unhandled_irq; 458 unsigned long idle_irq; 459 unsigned long rw_reqbuf; 460}; 461 462struct ata_ering_entry { 463 int is_io; 464 unsigned int err_mask; 465 u64 timestamp; 466}; 467 468struct ata_ering { 469 int cursor; 470 struct ata_ering_entry ring[ATA_ERING_SIZE]; 471}; 472 473struct ata_device { 474 struct ata_port *ap; 475 unsigned int devno; /* 0 or 1 */ 476 unsigned long flags; /* ATA_DFLAG_xxx */ 477 struct scsi_device *sdev; /* attached SCSI device */ 478 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 479 u64 n_sectors; /* size of device, if ATA */ 480 unsigned int class; /* ATA_DEV_xxx */ 481 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 482 u8 pio_mode; 483 u8 dma_mode; 484 u8 xfer_mode; 485 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 486 487 unsigned int multi_count; /* sectors count for 488 READ/WRITE MULTIPLE */ 489 unsigned int max_sectors; /* per-device max sectors */ 490 unsigned int cdb_len; 491 492 /* per-dev xfer mask */ 493 unsigned int pio_mask; 494 unsigned int mwdma_mask; 495 unsigned int udma_mask; 496 497 /* for CHS addressing */ 498 u16 cylinders; /* Number of cylinders */ 499 u16 heads; /* Number of heads */ 500 u16 sectors; /* Number of sectors per track */ 501 502 /* error history */ 503 struct ata_ering ering; 504 unsigned int horkage; /* List of broken features */ 505}; 506 507/* Offset into struct ata_device. Fields above it are maintained 508 * acress device init. Fields below are zeroed. 509 */ 510#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 511 512struct ata_eh_info { 513 struct ata_device *dev; /* offending device */ 514 u32 serror; /* SError from LLDD */ 515 unsigned int err_mask; /* port-wide err_mask */ 516 unsigned int action; /* ATA_EH_* action mask */ 517 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 518 unsigned int flags; /* ATA_EHI_* flags */ 519 520 unsigned long hotplug_timestamp; 521 unsigned int probe_mask; 522 523 char desc[ATA_EH_DESC_LEN]; 524 int desc_len; 525}; 526 527struct ata_eh_context { 528 struct ata_eh_info i; 529 int tries[ATA_MAX_DEVICES]; 530 unsigned int classes[ATA_MAX_DEVICES]; 531 unsigned int did_probe_mask; 532}; 533 534struct ata_port { 535 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 536 const struct ata_port_operations *ops; 537 spinlock_t *lock; 538 unsigned long flags; /* ATA_FLAG_xxx */ 539 unsigned int pflags; /* ATA_PFLAG_xxx */ 540 unsigned int id; /* unique id req'd by scsi midlyr */ 541 unsigned int port_no; /* unique port #; from zero */ 542 543 struct ata_prd *prd; /* our SG list */ 544 dma_addr_t prd_dma; /* and its DMA mapping */ 545 546 void *pad; /* array of DMA pad buffers */ 547 dma_addr_t pad_dma; 548 549 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 550 551 u8 ctl; /* cache of ATA control register */ 552 u8 last_ctl; /* Cache last written value */ 553 unsigned int pio_mask; 554 unsigned int mwdma_mask; 555 unsigned int udma_mask; 556 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 557 unsigned int hw_sata_spd_limit; 558 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 559 560 /* record runtime error info, protected by host lock */ 561 struct ata_eh_info eh_info; 562 /* EH context owned by EH */ 563 struct ata_eh_context eh_context; 564 565 struct ata_device device[ATA_MAX_DEVICES]; 566 567 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 568 unsigned long qc_allocated; 569 unsigned int qc_active; 570 571 unsigned int active_tag; 572 u32 sactive; 573 574 struct ata_port_stats stats; 575 struct ata_host *host; 576 struct device *dev; 577 578 void *port_task_data; 579 struct delayed_work port_task; 580 struct delayed_work hotplug_task; 581 struct work_struct scsi_rescan_task; 582 583 unsigned int hsm_task_state; 584 585 u32 msg_enable; 586 struct list_head eh_done_q; 587 wait_queue_head_t eh_wait_q; 588 589 pm_message_t pm_mesg; 590 int *pm_result; 591 592 void *private_data; 593 594 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 595}; 596 597struct ata_port_operations { 598 void (*port_disable) (struct ata_port *); 599 600 void (*dev_config) (struct ata_port *, struct ata_device *); 601 602 void (*set_piomode) (struct ata_port *, struct ata_device *); 603 void (*set_dmamode) (struct ata_port *, struct ata_device *); 604 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long); 605 606 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 607 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 608 609 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 610 u8 (*check_status)(struct ata_port *ap); 611 u8 (*check_altstatus)(struct ata_port *ap); 612 void (*dev_select)(struct ata_port *ap, unsigned int device); 613 614 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 615 void (*set_mode) (struct ata_port *ap); 616 617 void (*post_set_mode) (struct ata_port *ap); 618 619 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 620 621 void (*bmdma_setup) (struct ata_queued_cmd *qc); 622 void (*bmdma_start) (struct ata_queued_cmd *qc); 623 624 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 625 626 void (*qc_prep) (struct ata_queued_cmd *qc); 627 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 628 629 /* Error handlers. ->error_handler overrides ->eng_timeout and 630 * indicates that new-style EH is in place. 631 */ 632 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 633 634 void (*freeze) (struct ata_port *ap); 635 void (*thaw) (struct ata_port *ap); 636 void (*error_handler) (struct ata_port *ap); 637 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 638 639 irq_handler_t irq_handler; 640 void (*irq_clear) (struct ata_port *); 641 642 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 643 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 644 u32 val); 645 646 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 647 int (*port_resume) (struct ata_port *ap); 648 649 int (*port_start) (struct ata_port *ap); 650 void (*port_stop) (struct ata_port *ap); 651 652 void (*host_stop) (struct ata_host *host); 653 654 void (*bmdma_stop) (struct ata_queued_cmd *qc); 655 u8 (*bmdma_status) (struct ata_port *ap); 656}; 657 658struct ata_port_info { 659 struct scsi_host_template *sht; 660 unsigned long flags; 661 unsigned long pio_mask; 662 unsigned long mwdma_mask; 663 unsigned long udma_mask; 664 const struct ata_port_operations *port_ops; 665 void *private_data; 666}; 667 668struct ata_timing { 669 unsigned short mode; /* ATA mode */ 670 unsigned short setup; /* t1 */ 671 unsigned short act8b; /* t2 for 8-bit I/O */ 672 unsigned short rec8b; /* t2i for 8-bit I/O */ 673 unsigned short cyc8b; /* t0 for 8-bit I/O */ 674 unsigned short active; /* t2 or tD */ 675 unsigned short recover; /* t2i or tK */ 676 unsigned short cycle; /* t0 */ 677 unsigned short udma; /* t2CYCTYP/2 */ 678}; 679 680#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 681 682extern const unsigned long sata_deb_timing_normal[]; 683extern const unsigned long sata_deb_timing_hotplug[]; 684extern const unsigned long sata_deb_timing_long[]; 685 686extern const struct ata_port_operations ata_dummy_port_ops; 687 688static inline const unsigned long * 689sata_ehc_deb_timing(struct ata_eh_context *ehc) 690{ 691 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 692 return sata_deb_timing_hotplug; 693 else 694 return sata_deb_timing_normal; 695} 696 697static inline int ata_port_is_dummy(struct ata_port *ap) 698{ 699 return ap->ops == &ata_dummy_port_ops; 700} 701 702extern void ata_port_probe(struct ata_port *); 703extern void __sata_phy_reset(struct ata_port *ap); 704extern void sata_phy_reset(struct ata_port *ap); 705extern void ata_bus_reset(struct ata_port *ap); 706extern int sata_set_spd(struct ata_port *ap); 707extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param); 708extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param); 709extern int ata_std_prereset(struct ata_port *ap); 710extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); 711extern int sata_port_hardreset(struct ata_port *ap, 712 const unsigned long *timing); 713extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); 714extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 715extern void ata_port_disable(struct ata_port *); 716extern void ata_std_ports(struct ata_ioports *ioaddr); 717#ifdef CONFIG_PCI 718extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 719 unsigned int n_ports); 720extern void ata_pci_remove_one (struct pci_dev *pdev); 721extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 722extern void ata_pci_device_do_resume(struct pci_dev *pdev); 723extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 724extern int ata_pci_device_resume(struct pci_dev *pdev); 725extern int ata_pci_clear_simplex(struct pci_dev *pdev); 726#endif /* CONFIG_PCI */ 727extern int ata_device_add(const struct ata_probe_ent *ent); 728extern void ata_port_detach(struct ata_port *ap); 729extern void ata_host_init(struct ata_host *, struct device *, 730 unsigned long, const struct ata_port_operations *); 731extern void ata_host_remove(struct ata_host *host); 732extern int ata_scsi_detect(struct scsi_host_template *sht); 733extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 734extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 735extern int ata_scsi_release(struct Scsi_Host *host); 736extern void ata_sas_port_destroy(struct ata_port *); 737extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 738 struct ata_port_info *, struct Scsi_Host *); 739extern int ata_sas_port_init(struct ata_port *); 740extern int ata_sas_port_start(struct ata_port *ap); 741extern void ata_sas_port_stop(struct ata_port *ap); 742extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 743extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 744 struct ata_port *ap); 745extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 746extern int sata_scr_valid(struct ata_port *ap); 747extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 748extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 749extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 750extern int ata_port_online(struct ata_port *ap); 751extern int ata_port_offline(struct ata_port *ap); 752extern int ata_scsi_device_resume(struct scsi_device *); 753extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg); 754extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 755extern void ata_host_resume(struct ata_host *host); 756extern int ata_ratelimit(void); 757extern int ata_busy_sleep(struct ata_port *ap, 758 unsigned long timeout_pat, unsigned long timeout); 759extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 760 void *data, unsigned long delay); 761extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 762 unsigned long interval_msec, 763 unsigned long timeout_msec); 764 765/* 766 * Default driver ops implementations 767 */ 768extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 769extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 770extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 771extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 772extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 773extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 774extern u8 ata_check_status(struct ata_port *ap); 775extern u8 ata_altstatus(struct ata_port *ap); 776extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 777extern int ata_port_start (struct ata_port *ap); 778extern void ata_port_stop (struct ata_port *ap); 779extern void ata_host_stop (struct ata_host *host); 780extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 781extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf, 782 unsigned int buflen, int write_data); 783extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf, 784 unsigned int buflen, int write_data); 785extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 786 unsigned int buflen, int write_data); 787extern void ata_qc_prep(struct ata_queued_cmd *qc); 788extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 789extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 790extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 791 unsigned int buflen); 792extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 793 unsigned int n_elem); 794extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 795extern void ata_id_string(const u16 *id, unsigned char *s, 796 unsigned int ofs, unsigned int len); 797extern void ata_id_c_string(const u16 *id, unsigned char *s, 798 unsigned int ofs, unsigned int len); 799extern unsigned long ata_device_blacklisted(const struct ata_device *dev); 800extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 801extern void ata_bmdma_start (struct ata_queued_cmd *qc); 802extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 803extern u8 ata_bmdma_status(struct ata_port *ap); 804extern void ata_bmdma_irq_clear(struct ata_port *ap); 805extern void ata_bmdma_freeze(struct ata_port *ap); 806extern void ata_bmdma_thaw(struct ata_port *ap); 807extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 808 ata_reset_fn_t softreset, 809 ata_reset_fn_t hardreset, 810 ata_postreset_fn_t postreset); 811extern void ata_bmdma_error_handler(struct ata_port *ap); 812extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 813extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 814 u8 status, int in_wq); 815extern void ata_qc_complete(struct ata_queued_cmd *qc); 816extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 817 void (*finish_qc)(struct ata_queued_cmd *)); 818extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 819 void (*done)(struct scsi_cmnd *)); 820extern int ata_std_bios_param(struct scsi_device *sdev, 821 struct block_device *bdev, 822 sector_t capacity, int geom[]); 823extern int ata_scsi_slave_config(struct scsi_device *sdev); 824extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 825extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 826 int queue_depth); 827extern struct ata_device *ata_dev_pair(struct ata_device *adev); 828 829/* 830 * Timing helpers 831 */ 832 833extern unsigned int ata_pio_need_iordy(const struct ata_device *); 834extern int ata_timing_compute(struct ata_device *, unsigned short, 835 struct ata_timing *, int, int); 836extern void ata_timing_merge(const struct ata_timing *, 837 const struct ata_timing *, struct ata_timing *, 838 unsigned int); 839 840enum { 841 ATA_TIMING_SETUP = (1 << 0), 842 ATA_TIMING_ACT8B = (1 << 1), 843 ATA_TIMING_REC8B = (1 << 2), 844 ATA_TIMING_CYC8B = (1 << 3), 845 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 846 ATA_TIMING_CYC8B, 847 ATA_TIMING_ACTIVE = (1 << 4), 848 ATA_TIMING_RECOVER = (1 << 5), 849 ATA_TIMING_CYCLE = (1 << 6), 850 ATA_TIMING_UDMA = (1 << 7), 851 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 852 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 853 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 854 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 855}; 856 857 858#ifdef CONFIG_PCI 859struct pci_bits { 860 unsigned int reg; /* PCI config register to read */ 861 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 862 unsigned long mask; 863 unsigned long val; 864}; 865 866extern void ata_pci_host_stop (struct ata_host *host); 867extern struct ata_probe_ent * 868ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); 869extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 870extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long); 871#endif /* CONFIG_PCI */ 872 873/* 874 * EH 875 */ 876extern void ata_eng_timeout(struct ata_port *ap); 877 878extern void ata_port_schedule_eh(struct ata_port *ap); 879extern int ata_port_abort(struct ata_port *ap); 880extern int ata_port_freeze(struct ata_port *ap); 881 882extern void ata_eh_freeze_port(struct ata_port *ap); 883extern void ata_eh_thaw_port(struct ata_port *ap); 884 885extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 886extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 887 888extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 889 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 890 ata_postreset_fn_t postreset); 891 892/* 893 * printk helpers 894 */ 895#define ata_port_printk(ap, lv, fmt, args...) \ 896 printk(lv"ata%u: "fmt, (ap)->id , ##args) 897 898#define ata_dev_printk(dev, lv, fmt, args...) \ 899 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args) 900 901/* 902 * ata_eh_info helpers 903 */ 904#define ata_ehi_push_desc(ehi, fmt, args...) do { \ 905 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 906 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 907 fmt , ##args); \ 908} while (0) 909 910#define ata_ehi_clear_desc(ehi) do { \ 911 (ehi)->desc[0] = '\0'; \ 912 (ehi)->desc_len = 0; \ 913} while (0) 914 915static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi) 916{ 917 if (ehi->flags & ATA_EHI_HOTPLUGGED) 918 return; 919 920 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK; 921 ehi->hotplug_timestamp = jiffies; 922 923 ehi->action |= ATA_EH_SOFTRESET; 924 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 925} 926 927static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 928{ 929 __ata_ehi_hotplugged(ehi); 930 ehi->err_mask |= AC_ERR_ATA_BUS; 931} 932 933/* 934 * qc helpers 935 */ 936static inline int 937ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 938{ 939 if (sg == &qc->pad_sgent) 940 return 1; 941 if (qc->pad_len) 942 return 0; 943 if (((sg - qc->__sg) + 1) == qc->n_elem) 944 return 1; 945 return 0; 946} 947 948static inline struct scatterlist * 949ata_qc_first_sg(struct ata_queued_cmd *qc) 950{ 951 if (qc->n_elem) 952 return qc->__sg; 953 if (qc->pad_len) 954 return &qc->pad_sgent; 955 return NULL; 956} 957 958static inline struct scatterlist * 959ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 960{ 961 if (sg == &qc->pad_sgent) 962 return NULL; 963 if (++sg - qc->__sg < qc->n_elem) 964 return sg; 965 if (qc->pad_len) 966 return &qc->pad_sgent; 967 return NULL; 968} 969 970#define ata_for_each_sg(sg, qc) \ 971 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 972 973static inline unsigned int ata_tag_valid(unsigned int tag) 974{ 975 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 976} 977 978static inline unsigned int ata_tag_internal(unsigned int tag) 979{ 980 return tag == ATA_MAX_QUEUE - 1; 981} 982 983/* 984 * device helpers 985 */ 986static inline unsigned int ata_class_enabled(unsigned int class) 987{ 988 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 989} 990 991static inline unsigned int ata_class_disabled(unsigned int class) 992{ 993 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 994} 995 996static inline unsigned int ata_class_absent(unsigned int class) 997{ 998 return !ata_class_enabled(class) && !ata_class_disabled(class); 999} 1000 1001static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1002{ 1003 return ata_class_enabled(dev->class); 1004} 1005 1006static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1007{ 1008 return ata_class_disabled(dev->class); 1009} 1010 1011static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1012{ 1013 return ata_class_absent(dev->class); 1014} 1015 1016static inline unsigned int ata_dev_ready(const struct ata_device *dev) 1017{ 1018 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED); 1019} 1020 1021/* 1022 * port helpers 1023 */ 1024static inline int ata_port_max_devices(const struct ata_port *ap) 1025{ 1026 if (ap->flags & ATA_FLAG_SLAVE_POSS) 1027 return 2; 1028 return 1; 1029} 1030 1031 1032static inline u8 ata_chk_status(struct ata_port *ap) 1033{ 1034 return ap->ops->check_status(ap); 1035} 1036 1037 1038/** 1039 * ata_pause - Flush writes and pause 400 nanoseconds. 1040 * @ap: Port to wait for. 1041 * 1042 * LOCKING: 1043 * Inherited from caller. 1044 */ 1045 1046static inline void ata_pause(struct ata_port *ap) 1047{ 1048 ata_altstatus(ap); 1049 ndelay(400); 1050} 1051 1052 1053/** 1054 * ata_busy_wait - Wait for a port status register 1055 * @ap: Port to wait for. 1056 * 1057 * Waits up to max*10 microseconds for the selected bits in the port's 1058 * status register to be cleared. 1059 * Returns final value of status register. 1060 * 1061 * LOCKING: 1062 * Inherited from caller. 1063 */ 1064 1065static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1066 unsigned int max) 1067{ 1068 u8 status; 1069 1070 do { 1071 udelay(10); 1072 status = ata_chk_status(ap); 1073 max--; 1074 } while (status != 0xff && (status & bits) && (max > 0)); 1075 1076 return status; 1077} 1078 1079 1080/** 1081 * ata_wait_idle - Wait for a port to be idle. 1082 * @ap: Port to wait for. 1083 * 1084 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1085 * Returns final value of status register. 1086 * 1087 * LOCKING: 1088 * Inherited from caller. 1089 */ 1090 1091static inline u8 ata_wait_idle(struct ata_port *ap) 1092{ 1093 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1094 1095 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) { 1096 unsigned long l = ap->ioaddr.status_addr; 1097 if (ata_msg_warn(ap)) 1098 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n", 1099 status, l); 1100 } 1101 1102 return status; 1103} 1104 1105static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1106{ 1107 qc->tf.ctl |= ATA_NIEN; 1108} 1109 1110static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1111 unsigned int tag) 1112{ 1113 if (likely(ata_tag_valid(tag))) 1114 return &ap->qcmd[tag]; 1115 return NULL; 1116} 1117 1118static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1119 unsigned int tag) 1120{ 1121 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1122 1123 if (unlikely(!qc) || !ap->ops->error_handler) 1124 return qc; 1125 1126 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1127 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1128 return qc; 1129 1130 return NULL; 1131} 1132 1133static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1134{ 1135 memset(tf, 0, sizeof(*tf)); 1136 1137 tf->ctl = dev->ap->ctl; 1138 if (dev->devno == 0) 1139 tf->device = ATA_DEVICE_OBS; 1140 else 1141 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1142} 1143 1144static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1145{ 1146 qc->dma_dir = DMA_NONE; 1147 qc->__sg = NULL; 1148 qc->flags = 0; 1149 qc->cursect = qc->cursg = qc->cursg_ofs = 0; 1150 qc->nsect = 0; 1151 qc->nbytes = qc->curbytes = 0; 1152 qc->n_elem = 0; 1153 qc->err_mask = 0; 1154 1155 ata_tf_init(qc->dev, &qc->tf); 1156 1157 /* init result_tf such that it indicates normal completion */ 1158 qc->result_tf.command = ATA_DRDY; 1159 qc->result_tf.feature = 0; 1160} 1161 1162/** 1163 * ata_irq_ack - Acknowledge a device interrupt. 1164 * @ap: Port on which interrupts are enabled. 1165 * 1166 * Wait up to 10 ms for legacy IDE device to become idle (BUSY 1167 * or BUSY+DRQ clear). Obtain dma status and port status from 1168 * device. Clear the interrupt. Return port status. 1169 * 1170 * LOCKING: 1171 */ 1172 1173static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) 1174{ 1175 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; 1176 u8 host_stat, post_stat, status; 1177 1178 status = ata_busy_wait(ap, bits, 1000); 1179 if (status & bits) 1180 if (ata_msg_err(ap)) 1181 printk(KERN_ERR "abnormal status 0x%X\n", status); 1182 1183 /* get controller status; clear intr, err bits */ 1184 if (ap->flags & ATA_FLAG_MMIO) { 1185 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; 1186 host_stat = readb(mmio + ATA_DMA_STATUS); 1187 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 1188 mmio + ATA_DMA_STATUS); 1189 1190 post_stat = readb(mmio + ATA_DMA_STATUS); 1191 } else { 1192 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1193 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 1194 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1195 1196 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1197 } 1198 1199 if (ata_msg_intr(ap)) 1200 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", 1201 __FUNCTION__, 1202 host_stat, post_stat, status); 1203 1204 return status; 1205} 1206 1207static inline int ata_try_flush_cache(const struct ata_device *dev) 1208{ 1209 return ata_id_wcache_enabled(dev->id) || 1210 ata_id_has_flush(dev->id) || 1211 ata_id_has_flush_ext(dev->id); 1212} 1213 1214static inline unsigned int ac_err_mask(u8 status) 1215{ 1216 if (status & (ATA_BUSY | ATA_DRQ)) 1217 return AC_ERR_HSM; 1218 if (status & (ATA_ERR | ATA_DF)) 1219 return AC_ERR_DEV; 1220 return 0; 1221} 1222 1223static inline unsigned int __ac_err_mask(u8 status) 1224{ 1225 unsigned int mask = ac_err_mask(status); 1226 if (mask == 0) 1227 return AC_ERR_OTHER; 1228 return mask; 1229} 1230 1231static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1232{ 1233 ap->pad_dma = 0; 1234 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1235 &ap->pad_dma, GFP_KERNEL); 1236 return (ap->pad == NULL) ? -ENOMEM : 0; 1237} 1238 1239static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1240{ 1241 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1242} 1243 1244static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1245{ 1246 return (struct ata_port *) &host->hostdata[0]; 1247} 1248 1249#endif /* __LINUX_LIBATA_H__ */ 1250