libata.h revision 52bad64d95bd89e08c49ec5a071fa6dcbe5a1a9c
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_CFG_MASK = (1 << 8) - 1, 144 145 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */ 146 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */ 147 ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */ 148 ATA_DFLAG_INIT_MASK = (1 << 16) - 1, 149 150 ATA_DFLAG_DETACH = (1 << 16), 151 ATA_DFLAG_DETACHED = (1 << 17), 152 153 ATA_DEV_UNKNOWN = 0, /* unknown device */ 154 ATA_DEV_ATA = 1, /* ATA device */ 155 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 156 ATA_DEV_ATAPI = 3, /* ATAPI device */ 157 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 158 ATA_DEV_NONE = 5, /* no device */ 159 160 /* struct ata_port flags */ 161 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 162 /* (doesn't imply presence) */ 163 ATA_FLAG_SATA = (1 << 1), 164 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 165 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 166 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 167 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 168 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 169 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 170 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 171 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 172 * doesn't handle PIO interrupts */ 173 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 174 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ 175 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H 176 * Register FIS clearing BSY */ 177 ATA_FLAG_DEBUGMSG = (1 << 13), 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 */ 195 196 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */ 197 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 198 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 199 200 /* struct ata_queued_cmd flags */ 201 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 202 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 203 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 204 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 205 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 206 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 207 208 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 209 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 210 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 211 212 /* host set flags */ 213 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 214 215 /* various lengths of time */ 216 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 217 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 218 ATA_TMOUT_INTERNAL = 30 * HZ, 219 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 220 221 /* ATA bus states */ 222 BUS_UNKNOWN = 0, 223 BUS_DMA = 1, 224 BUS_IDLE = 2, 225 BUS_NOINTR = 3, 226 BUS_NODATA = 4, 227 BUS_TIMER = 5, 228 BUS_PIO = 6, 229 BUS_EDD = 7, 230 BUS_IDENTIFY = 8, 231 BUS_PACKET = 9, 232 233 /* SATA port states */ 234 PORT_UNKNOWN = 0, 235 PORT_ENABLED = 1, 236 PORT_DISABLED = 2, 237 238 /* encoding various smaller bitmaps into a single 239 * unsigned int bitmap 240 */ 241 ATA_BITS_PIO = 7, 242 ATA_BITS_MWDMA = 5, 243 ATA_BITS_UDMA = 8, 244 245 ATA_SHIFT_PIO = 0, 246 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, 247 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, 248 249 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, 250 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, 251 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, 252 253 /* size of buffer to pad xfers ending on unaligned boundaries */ 254 ATA_DMA_PAD_SZ = 4, 255 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 256 257 /* masks for port functions */ 258 ATA_PORT_PRIMARY = (1 << 0), 259 ATA_PORT_SECONDARY = (1 << 1), 260 261 /* ering size */ 262 ATA_ERING_SIZE = 32, 263 264 /* desc_len for ata_eh_info and context */ 265 ATA_EH_DESC_LEN = 80, 266 267 /* reset / recovery action types */ 268 ATA_EH_REVALIDATE = (1 << 0), 269 ATA_EH_SOFTRESET = (1 << 1), 270 ATA_EH_HARDRESET = (1 << 2), 271 ATA_EH_SUSPEND = (1 << 3), 272 ATA_EH_RESUME = (1 << 4), 273 ATA_EH_PM_FREEZE = (1 << 5), 274 275 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 276 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND | 277 ATA_EH_RESUME | ATA_EH_PM_FREEZE, 278 279 /* ata_eh_info->flags */ 280 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 281 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ 282 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 283 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 284 285 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */ 286 287 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, 288 289 /* max repeat if error condition is still set after ->error_handler */ 290 ATA_EH_MAX_REPEAT = 5, 291 292 /* how hard are we gonna try to probe/recover devices */ 293 ATA_PROBE_MAX_TRIES = 3, 294 ATA_EH_RESET_TRIES = 3, 295 ATA_EH_DEV_TRIES = 3, 296 297 /* Drive spinup time (time from power-on to the first D2H FIS) 298 * in msecs - 8s currently. Failing to get ready in this time 299 * isn't critical. It will result in reset failure for 300 * controllers which can't wait for the first D2H FIS. libata 301 * will retry, so it just has to be long enough to spin up 302 * most devices. 303 */ 304 ATA_SPINUP_WAIT = 8000, 305 306 /* Horkage types. May be set by libata or controller on drives 307 (some horkage may be drive/controller pair dependant */ 308 309 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 310}; 311 312enum hsm_task_states { 313 HSM_ST_UNKNOWN, /* state unknown */ 314 HSM_ST_IDLE, /* no command on going */ 315 HSM_ST, /* (waiting the device to) transfer data */ 316 HSM_ST_LAST, /* (waiting the device to) complete command */ 317 HSM_ST_ERR, /* error */ 318 HSM_ST_FIRST, /* (waiting the device to) 319 write CDB or first data block */ 320}; 321 322enum ata_completion_errors { 323 AC_ERR_DEV = (1 << 0), /* device reported error */ 324 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 325 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 326 AC_ERR_MEDIA = (1 << 3), /* media error */ 327 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 328 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 329 AC_ERR_SYSTEM = (1 << 6), /* system error */ 330 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 331 AC_ERR_OTHER = (1 << 8), /* unknown */ 332}; 333 334/* forward declarations */ 335struct scsi_device; 336struct ata_port_operations; 337struct ata_port; 338struct ata_queued_cmd; 339 340/* typedefs */ 341typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 342typedef int (*ata_prereset_fn_t)(struct ata_port *ap); 343typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes); 344typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 345 346struct ata_ioports { 347 unsigned long cmd_addr; 348 unsigned long data_addr; 349 unsigned long error_addr; 350 unsigned long feature_addr; 351 unsigned long nsect_addr; 352 unsigned long lbal_addr; 353 unsigned long lbam_addr; 354 unsigned long lbah_addr; 355 unsigned long device_addr; 356 unsigned long status_addr; 357 unsigned long command_addr; 358 unsigned long altstatus_addr; 359 unsigned long ctl_addr; 360 unsigned long bmdma_addr; 361 unsigned long scr_addr; 362}; 363 364struct ata_probe_ent { 365 struct list_head node; 366 struct device *dev; 367 const struct ata_port_operations *port_ops; 368 struct scsi_host_template *sht; 369 struct ata_ioports port[ATA_MAX_PORTS]; 370 unsigned int n_ports; 371 unsigned int dummy_port_mask; 372 unsigned int pio_mask; 373 unsigned int mwdma_mask; 374 unsigned int udma_mask; 375 unsigned long irq; 376 unsigned long irq2; 377 unsigned int irq_flags; 378 unsigned long port_flags; 379 unsigned long _host_flags; 380 void __iomem *mmio_base; 381 void *private_data; 382 383 /* port_info for the secondary port. Together with irq2, it's 384 * used to implement non-uniform secondary port. Currently, 385 * the only user is ata_piix combined mode. This workaround 386 * will be removed together with ata_probe_ent when init model 387 * is updated. 388 */ 389 const struct ata_port_info *pinfo2; 390}; 391 392struct ata_host { 393 spinlock_t lock; 394 struct device *dev; 395 unsigned long irq; 396 unsigned long irq2; 397 void __iomem *mmio_base; 398 unsigned int n_ports; 399 void *private_data; 400 const struct ata_port_operations *ops; 401 unsigned long flags; 402 int simplex_claimed; /* Keep seperate in case we 403 ever need to do this locked */ 404 struct ata_port *ports[0]; 405}; 406 407struct ata_queued_cmd { 408 struct ata_port *ap; 409 struct ata_device *dev; 410 411 struct scsi_cmnd *scsicmd; 412 void (*scsidone)(struct scsi_cmnd *); 413 414 struct ata_taskfile tf; 415 u8 cdb[ATAPI_CDB_LEN]; 416 417 unsigned long flags; /* ATA_QCFLAG_xxx */ 418 unsigned int tag; 419 unsigned int n_elem; 420 unsigned int orig_n_elem; 421 422 int dma_dir; 423 424 unsigned int pad_len; 425 426 unsigned int nsect; 427 unsigned int cursect; 428 429 unsigned int nbytes; 430 unsigned int curbytes; 431 432 unsigned int cursg; 433 unsigned int cursg_ofs; 434 435 struct scatterlist sgent; 436 struct scatterlist pad_sgent; 437 void *buf_virt; 438 439 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 440 struct scatterlist *__sg; 441 442 unsigned int err_mask; 443 struct ata_taskfile result_tf; 444 ata_qc_cb_t complete_fn; 445 446 void *private_data; 447}; 448 449struct ata_port_stats { 450 unsigned long unhandled_irq; 451 unsigned long idle_irq; 452 unsigned long rw_reqbuf; 453}; 454 455struct ata_ering_entry { 456 int is_io; 457 unsigned int err_mask; 458 u64 timestamp; 459}; 460 461struct ata_ering { 462 int cursor; 463 struct ata_ering_entry ring[ATA_ERING_SIZE]; 464}; 465 466struct ata_device { 467 struct ata_port *ap; 468 unsigned int devno; /* 0 or 1 */ 469 unsigned long flags; /* ATA_DFLAG_xxx */ 470 struct scsi_device *sdev; /* attached SCSI device */ 471 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 472 u64 n_sectors; /* size of device, if ATA */ 473 unsigned int class; /* ATA_DEV_xxx */ 474 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 475 u8 pio_mode; 476 u8 dma_mode; 477 u8 xfer_mode; 478 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 479 480 unsigned int multi_count; /* sectors count for 481 READ/WRITE MULTIPLE */ 482 unsigned int max_sectors; /* per-device max sectors */ 483 unsigned int cdb_len; 484 485 /* per-dev xfer mask */ 486 unsigned int pio_mask; 487 unsigned int mwdma_mask; 488 unsigned int udma_mask; 489 490 /* for CHS addressing */ 491 u16 cylinders; /* Number of cylinders */ 492 u16 heads; /* Number of heads */ 493 u16 sectors; /* Number of sectors per track */ 494 495 /* error history */ 496 struct ata_ering ering; 497 unsigned int horkage; /* List of broken features */ 498}; 499 500/* Offset into struct ata_device. Fields above it are maintained 501 * acress device init. Fields below are zeroed. 502 */ 503#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 504 505struct ata_eh_info { 506 struct ata_device *dev; /* offending device */ 507 u32 serror; /* SError from LLDD */ 508 unsigned int err_mask; /* port-wide err_mask */ 509 unsigned int action; /* ATA_EH_* action mask */ 510 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 511 unsigned int flags; /* ATA_EHI_* flags */ 512 513 unsigned long hotplug_timestamp; 514 unsigned int probe_mask; 515 516 char desc[ATA_EH_DESC_LEN]; 517 int desc_len; 518}; 519 520struct ata_eh_context { 521 struct ata_eh_info i; 522 int tries[ATA_MAX_DEVICES]; 523 unsigned int classes[ATA_MAX_DEVICES]; 524 unsigned int did_probe_mask; 525}; 526 527struct ata_port { 528 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 529 const struct ata_port_operations *ops; 530 spinlock_t *lock; 531 unsigned long flags; /* ATA_FLAG_xxx */ 532 unsigned int pflags; /* ATA_PFLAG_xxx */ 533 unsigned int id; /* unique id req'd by scsi midlyr */ 534 unsigned int port_no; /* unique port #; from zero */ 535 536 struct ata_prd *prd; /* our SG list */ 537 dma_addr_t prd_dma; /* and its DMA mapping */ 538 539 void *pad; /* array of DMA pad buffers */ 540 dma_addr_t pad_dma; 541 542 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 543 544 u8 ctl; /* cache of ATA control register */ 545 u8 last_ctl; /* Cache last written value */ 546 unsigned int pio_mask; 547 unsigned int mwdma_mask; 548 unsigned int udma_mask; 549 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 550 unsigned int hw_sata_spd_limit; 551 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 552 553 /* record runtime error info, protected by host lock */ 554 struct ata_eh_info eh_info; 555 /* EH context owned by EH */ 556 struct ata_eh_context eh_context; 557 558 struct ata_device device[ATA_MAX_DEVICES]; 559 560 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 561 unsigned long qc_allocated; 562 unsigned int qc_active; 563 564 unsigned int active_tag; 565 u32 sactive; 566 567 struct ata_port_stats stats; 568 struct ata_host *host; 569 struct device *dev; 570 571 struct delayed_work port_task; 572 struct delayed_work hotplug_task; 573 struct work_struct scsi_rescan_task; 574 575 unsigned int hsm_task_state; 576 577 u32 msg_enable; 578 struct list_head eh_done_q; 579 wait_queue_head_t eh_wait_q; 580 581 pm_message_t pm_mesg; 582 int *pm_result; 583 584 void *private_data; 585 586 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 587}; 588 589struct ata_port_operations { 590 void (*port_disable) (struct ata_port *); 591 592 void (*dev_config) (struct ata_port *, struct ata_device *); 593 594 void (*set_piomode) (struct ata_port *, struct ata_device *); 595 void (*set_dmamode) (struct ata_port *, struct ata_device *); 596 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long); 597 598 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 599 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 600 601 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 602 u8 (*check_status)(struct ata_port *ap); 603 u8 (*check_altstatus)(struct ata_port *ap); 604 void (*dev_select)(struct ata_port *ap, unsigned int device); 605 606 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 607 void (*set_mode) (struct ata_port *ap); 608 609 void (*post_set_mode) (struct ata_port *ap); 610 611 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 612 613 void (*bmdma_setup) (struct ata_queued_cmd *qc); 614 void (*bmdma_start) (struct ata_queued_cmd *qc); 615 616 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 617 618 void (*qc_prep) (struct ata_queued_cmd *qc); 619 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 620 621 /* Error handlers. ->error_handler overrides ->eng_timeout and 622 * indicates that new-style EH is in place. 623 */ 624 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 625 626 void (*freeze) (struct ata_port *ap); 627 void (*thaw) (struct ata_port *ap); 628 void (*error_handler) (struct ata_port *ap); 629 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 630 631 irq_handler_t irq_handler; 632 void (*irq_clear) (struct ata_port *); 633 634 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 635 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 636 u32 val); 637 638 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 639 int (*port_resume) (struct ata_port *ap); 640 641 int (*port_start) (struct ata_port *ap); 642 void (*port_stop) (struct ata_port *ap); 643 644 void (*host_stop) (struct ata_host *host); 645 646 void (*bmdma_stop) (struct ata_queued_cmd *qc); 647 u8 (*bmdma_status) (struct ata_port *ap); 648}; 649 650struct ata_port_info { 651 struct scsi_host_template *sht; 652 unsigned long flags; 653 unsigned long pio_mask; 654 unsigned long mwdma_mask; 655 unsigned long udma_mask; 656 const struct ata_port_operations *port_ops; 657 void *private_data; 658}; 659 660struct ata_timing { 661 unsigned short mode; /* ATA mode */ 662 unsigned short setup; /* t1 */ 663 unsigned short act8b; /* t2 for 8-bit I/O */ 664 unsigned short rec8b; /* t2i for 8-bit I/O */ 665 unsigned short cyc8b; /* t0 for 8-bit I/O */ 666 unsigned short active; /* t2 or tD */ 667 unsigned short recover; /* t2i or tK */ 668 unsigned short cycle; /* t0 */ 669 unsigned short udma; /* t2CYCTYP/2 */ 670}; 671 672#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 673 674extern const unsigned long sata_deb_timing_normal[]; 675extern const unsigned long sata_deb_timing_hotplug[]; 676extern const unsigned long sata_deb_timing_long[]; 677 678extern const struct ata_port_operations ata_dummy_port_ops; 679 680static inline const unsigned long * 681sata_ehc_deb_timing(struct ata_eh_context *ehc) 682{ 683 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 684 return sata_deb_timing_hotplug; 685 else 686 return sata_deb_timing_normal; 687} 688 689static inline int ata_port_is_dummy(struct ata_port *ap) 690{ 691 return ap->ops == &ata_dummy_port_ops; 692} 693 694extern void ata_port_probe(struct ata_port *); 695extern void __sata_phy_reset(struct ata_port *ap); 696extern void sata_phy_reset(struct ata_port *ap); 697extern void ata_bus_reset(struct ata_port *ap); 698extern int sata_set_spd(struct ata_port *ap); 699extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param); 700extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param); 701extern int ata_std_prereset(struct ata_port *ap); 702extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); 703extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); 704extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 705extern void ata_port_disable(struct ata_port *); 706extern void ata_std_ports(struct ata_ioports *ioaddr); 707#ifdef CONFIG_PCI 708extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 709 unsigned int n_ports); 710extern void ata_pci_remove_one (struct pci_dev *pdev); 711extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 712extern void ata_pci_device_do_resume(struct pci_dev *pdev); 713extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 714extern int ata_pci_device_resume(struct pci_dev *pdev); 715extern int ata_pci_clear_simplex(struct pci_dev *pdev); 716#endif /* CONFIG_PCI */ 717extern int ata_device_add(const struct ata_probe_ent *ent); 718extern void ata_port_detach(struct ata_port *ap); 719extern void ata_host_init(struct ata_host *, struct device *, 720 unsigned long, const struct ata_port_operations *); 721extern void ata_host_remove(struct ata_host *host); 722extern int ata_scsi_detect(struct scsi_host_template *sht); 723extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 724extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 725extern int ata_scsi_release(struct Scsi_Host *host); 726extern void ata_sas_port_destroy(struct ata_port *); 727extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 728 struct ata_port_info *, struct Scsi_Host *); 729extern int ata_sas_port_init(struct ata_port *); 730extern int ata_sas_port_start(struct ata_port *ap); 731extern void ata_sas_port_stop(struct ata_port *ap); 732extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 733extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 734 struct ata_port *ap); 735extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 736extern int sata_scr_valid(struct ata_port *ap); 737extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 738extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 739extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 740extern int ata_port_online(struct ata_port *ap); 741extern int ata_port_offline(struct ata_port *ap); 742extern int ata_scsi_device_resume(struct scsi_device *); 743extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg); 744extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 745extern void ata_host_resume(struct ata_host *host); 746extern int ata_ratelimit(void); 747extern unsigned int ata_busy_sleep(struct ata_port *ap, 748 unsigned long timeout_pat, 749 unsigned long timeout); 750extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), 751 void *data, unsigned long delay); 752extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 753 unsigned long interval_msec, 754 unsigned long timeout_msec); 755 756/* 757 * Default driver ops implementations 758 */ 759extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 760extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 761extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 762extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 763extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 764extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 765extern u8 ata_check_status(struct ata_port *ap); 766extern u8 ata_altstatus(struct ata_port *ap); 767extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 768extern int ata_port_start (struct ata_port *ap); 769extern void ata_port_stop (struct ata_port *ap); 770extern void ata_host_stop (struct ata_host *host); 771extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 772extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf, 773 unsigned int buflen, int write_data); 774extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf, 775 unsigned int buflen, int write_data); 776extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 777 unsigned int buflen, int write_data); 778extern void ata_qc_prep(struct ata_queued_cmd *qc); 779extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 780extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 781extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 782 unsigned int buflen); 783extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 784 unsigned int n_elem); 785extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 786extern void ata_id_string(const u16 *id, unsigned char *s, 787 unsigned int ofs, unsigned int len); 788extern void ata_id_c_string(const u16 *id, unsigned char *s, 789 unsigned int ofs, unsigned int len); 790extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 791extern void ata_bmdma_start (struct ata_queued_cmd *qc); 792extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 793extern u8 ata_bmdma_status(struct ata_port *ap); 794extern void ata_bmdma_irq_clear(struct ata_port *ap); 795extern void ata_bmdma_freeze(struct ata_port *ap); 796extern void ata_bmdma_thaw(struct ata_port *ap); 797extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 798 ata_reset_fn_t softreset, 799 ata_reset_fn_t hardreset, 800 ata_postreset_fn_t postreset); 801extern void ata_bmdma_error_handler(struct ata_port *ap); 802extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 803extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 804 u8 status, int in_wq); 805extern void ata_qc_complete(struct ata_queued_cmd *qc); 806extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 807 void (*finish_qc)(struct ata_queued_cmd *)); 808extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 809 void (*done)(struct scsi_cmnd *)); 810extern int ata_std_bios_param(struct scsi_device *sdev, 811 struct block_device *bdev, 812 sector_t capacity, int geom[]); 813extern int ata_scsi_slave_config(struct scsi_device *sdev); 814extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 815extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 816 int queue_depth); 817extern struct ata_device *ata_dev_pair(struct ata_device *adev); 818 819/* 820 * Timing helpers 821 */ 822 823extern unsigned int ata_pio_need_iordy(const struct ata_device *); 824extern int ata_timing_compute(struct ata_device *, unsigned short, 825 struct ata_timing *, int, int); 826extern void ata_timing_merge(const struct ata_timing *, 827 const struct ata_timing *, struct ata_timing *, 828 unsigned int); 829 830enum { 831 ATA_TIMING_SETUP = (1 << 0), 832 ATA_TIMING_ACT8B = (1 << 1), 833 ATA_TIMING_REC8B = (1 << 2), 834 ATA_TIMING_CYC8B = (1 << 3), 835 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 836 ATA_TIMING_CYC8B, 837 ATA_TIMING_ACTIVE = (1 << 4), 838 ATA_TIMING_RECOVER = (1 << 5), 839 ATA_TIMING_CYCLE = (1 << 6), 840 ATA_TIMING_UDMA = (1 << 7), 841 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 842 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 843 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 844 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 845}; 846 847 848#ifdef CONFIG_PCI 849struct pci_bits { 850 unsigned int reg; /* PCI config register to read */ 851 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 852 unsigned long mask; 853 unsigned long val; 854}; 855 856extern void ata_pci_host_stop (struct ata_host *host); 857extern struct ata_probe_ent * 858ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); 859extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 860extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long); 861#endif /* CONFIG_PCI */ 862 863/* 864 * EH 865 */ 866extern void ata_eng_timeout(struct ata_port *ap); 867 868extern void ata_port_schedule_eh(struct ata_port *ap); 869extern int ata_port_abort(struct ata_port *ap); 870extern int ata_port_freeze(struct ata_port *ap); 871 872extern void ata_eh_freeze_port(struct ata_port *ap); 873extern void ata_eh_thaw_port(struct ata_port *ap); 874 875extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 876extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 877 878extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 879 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 880 ata_postreset_fn_t postreset); 881 882/* 883 * printk helpers 884 */ 885#define ata_port_printk(ap, lv, fmt, args...) \ 886 printk(lv"ata%u: "fmt, (ap)->id , ##args) 887 888#define ata_dev_printk(dev, lv, fmt, args...) \ 889 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args) 890 891/* 892 * ata_eh_info helpers 893 */ 894#define ata_ehi_push_desc(ehi, fmt, args...) do { \ 895 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 896 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 897 fmt , ##args); \ 898} while (0) 899 900#define ata_ehi_clear_desc(ehi) do { \ 901 (ehi)->desc[0] = '\0'; \ 902 (ehi)->desc_len = 0; \ 903} while (0) 904 905static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi) 906{ 907 if (ehi->flags & ATA_EHI_HOTPLUGGED) 908 return; 909 910 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK; 911 ehi->hotplug_timestamp = jiffies; 912 913 ehi->action |= ATA_EH_SOFTRESET; 914 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 915} 916 917static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 918{ 919 __ata_ehi_hotplugged(ehi); 920 ehi->err_mask |= AC_ERR_ATA_BUS; 921} 922 923/* 924 * qc helpers 925 */ 926static inline int 927ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 928{ 929 if (sg == &qc->pad_sgent) 930 return 1; 931 if (qc->pad_len) 932 return 0; 933 if (((sg - qc->__sg) + 1) == qc->n_elem) 934 return 1; 935 return 0; 936} 937 938static inline struct scatterlist * 939ata_qc_first_sg(struct ata_queued_cmd *qc) 940{ 941 if (qc->n_elem) 942 return qc->__sg; 943 if (qc->pad_len) 944 return &qc->pad_sgent; 945 return NULL; 946} 947 948static inline struct scatterlist * 949ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 950{ 951 if (sg == &qc->pad_sgent) 952 return NULL; 953 if (++sg - qc->__sg < qc->n_elem) 954 return sg; 955 if (qc->pad_len) 956 return &qc->pad_sgent; 957 return NULL; 958} 959 960#define ata_for_each_sg(sg, qc) \ 961 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 962 963static inline unsigned int ata_tag_valid(unsigned int tag) 964{ 965 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 966} 967 968static inline unsigned int ata_tag_internal(unsigned int tag) 969{ 970 return tag == ATA_MAX_QUEUE - 1; 971} 972 973/* 974 * device helpers 975 */ 976static inline unsigned int ata_class_enabled(unsigned int class) 977{ 978 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 979} 980 981static inline unsigned int ata_class_disabled(unsigned int class) 982{ 983 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 984} 985 986static inline unsigned int ata_class_absent(unsigned int class) 987{ 988 return !ata_class_enabled(class) && !ata_class_disabled(class); 989} 990 991static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 992{ 993 return ata_class_enabled(dev->class); 994} 995 996static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 997{ 998 return ata_class_disabled(dev->class); 999} 1000 1001static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1002{ 1003 return ata_class_absent(dev->class); 1004} 1005 1006static inline unsigned int ata_dev_ready(const struct ata_device *dev) 1007{ 1008 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED); 1009} 1010 1011/* 1012 * port helpers 1013 */ 1014static inline int ata_port_max_devices(const struct ata_port *ap) 1015{ 1016 if (ap->flags & ATA_FLAG_SLAVE_POSS) 1017 return 2; 1018 return 1; 1019} 1020 1021 1022static inline u8 ata_chk_status(struct ata_port *ap) 1023{ 1024 return ap->ops->check_status(ap); 1025} 1026 1027 1028/** 1029 * ata_pause - Flush writes and pause 400 nanoseconds. 1030 * @ap: Port to wait for. 1031 * 1032 * LOCKING: 1033 * Inherited from caller. 1034 */ 1035 1036static inline void ata_pause(struct ata_port *ap) 1037{ 1038 ata_altstatus(ap); 1039 ndelay(400); 1040} 1041 1042 1043/** 1044 * ata_busy_wait - Wait for a port status register 1045 * @ap: Port to wait for. 1046 * 1047 * Waits up to max*10 microseconds for the selected bits in the port's 1048 * status register to be cleared. 1049 * Returns final value of status register. 1050 * 1051 * LOCKING: 1052 * Inherited from caller. 1053 */ 1054 1055static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1056 unsigned int max) 1057{ 1058 u8 status; 1059 1060 do { 1061 udelay(10); 1062 status = ata_chk_status(ap); 1063 max--; 1064 } while ((status & bits) && (max > 0)); 1065 1066 return status; 1067} 1068 1069 1070/** 1071 * ata_wait_idle - Wait for a port to be idle. 1072 * @ap: Port to wait for. 1073 * 1074 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1075 * Returns final value of status register. 1076 * 1077 * LOCKING: 1078 * Inherited from caller. 1079 */ 1080 1081static inline u8 ata_wait_idle(struct ata_port *ap) 1082{ 1083 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1084 1085 if (status & (ATA_BUSY | ATA_DRQ)) { 1086 unsigned long l = ap->ioaddr.status_addr; 1087 if (ata_msg_warn(ap)) 1088 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n", 1089 status, l); 1090 } 1091 1092 return status; 1093} 1094 1095static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1096{ 1097 qc->tf.ctl |= ATA_NIEN; 1098} 1099 1100static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1101 unsigned int tag) 1102{ 1103 if (likely(ata_tag_valid(tag))) 1104 return &ap->qcmd[tag]; 1105 return NULL; 1106} 1107 1108static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1109 unsigned int tag) 1110{ 1111 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1112 1113 if (unlikely(!qc) || !ap->ops->error_handler) 1114 return qc; 1115 1116 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1117 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1118 return qc; 1119 1120 return NULL; 1121} 1122 1123static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1124{ 1125 memset(tf, 0, sizeof(*tf)); 1126 1127 tf->ctl = dev->ap->ctl; 1128 if (dev->devno == 0) 1129 tf->device = ATA_DEVICE_OBS; 1130 else 1131 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1132} 1133 1134static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1135{ 1136 qc->__sg = NULL; 1137 qc->flags = 0; 1138 qc->cursect = qc->cursg = qc->cursg_ofs = 0; 1139 qc->nsect = 0; 1140 qc->nbytes = qc->curbytes = 0; 1141 qc->err_mask = 0; 1142 1143 ata_tf_init(qc->dev, &qc->tf); 1144 1145 /* init result_tf such that it indicates normal completion */ 1146 qc->result_tf.command = ATA_DRDY; 1147 qc->result_tf.feature = 0; 1148} 1149 1150/** 1151 * ata_irq_on - Enable interrupts on a port. 1152 * @ap: Port on which interrupts are enabled. 1153 * 1154 * Enable interrupts on a legacy IDE device using MMIO or PIO, 1155 * wait for idle, clear any pending interrupts. 1156 * 1157 * LOCKING: 1158 * Inherited from caller. 1159 */ 1160 1161static inline u8 ata_irq_on(struct ata_port *ap) 1162{ 1163 struct ata_ioports *ioaddr = &ap->ioaddr; 1164 u8 tmp; 1165 1166 ap->ctl &= ~ATA_NIEN; 1167 ap->last_ctl = ap->ctl; 1168 1169 if (ap->flags & ATA_FLAG_MMIO) 1170 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); 1171 else 1172 outb(ap->ctl, ioaddr->ctl_addr); 1173 tmp = ata_wait_idle(ap); 1174 1175 ap->ops->irq_clear(ap); 1176 1177 return tmp; 1178} 1179 1180 1181/** 1182 * ata_irq_ack - Acknowledge a device interrupt. 1183 * @ap: Port on which interrupts are enabled. 1184 * 1185 * Wait up to 10 ms for legacy IDE device to become idle (BUSY 1186 * or BUSY+DRQ clear). Obtain dma status and port status from 1187 * device. Clear the interrupt. Return port status. 1188 * 1189 * LOCKING: 1190 */ 1191 1192static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) 1193{ 1194 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; 1195 u8 host_stat, post_stat, status; 1196 1197 status = ata_busy_wait(ap, bits, 1000); 1198 if (status & bits) 1199 if (ata_msg_err(ap)) 1200 printk(KERN_ERR "abnormal status 0x%X\n", status); 1201 1202 /* get controller status; clear intr, err bits */ 1203 if (ap->flags & ATA_FLAG_MMIO) { 1204 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; 1205 host_stat = readb(mmio + ATA_DMA_STATUS); 1206 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 1207 mmio + ATA_DMA_STATUS); 1208 1209 post_stat = readb(mmio + ATA_DMA_STATUS); 1210 } else { 1211 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1212 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 1213 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1214 1215 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1216 } 1217 1218 if (ata_msg_intr(ap)) 1219 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", 1220 __FUNCTION__, 1221 host_stat, post_stat, status); 1222 1223 return status; 1224} 1225 1226static inline int ata_try_flush_cache(const struct ata_device *dev) 1227{ 1228 return ata_id_wcache_enabled(dev->id) || 1229 ata_id_has_flush(dev->id) || 1230 ata_id_has_flush_ext(dev->id); 1231} 1232 1233static inline unsigned int ac_err_mask(u8 status) 1234{ 1235 if (status & (ATA_BUSY | ATA_DRQ)) 1236 return AC_ERR_HSM; 1237 if (status & (ATA_ERR | ATA_DF)) 1238 return AC_ERR_DEV; 1239 return 0; 1240} 1241 1242static inline unsigned int __ac_err_mask(u8 status) 1243{ 1244 unsigned int mask = ac_err_mask(status); 1245 if (mask == 0) 1246 return AC_ERR_OTHER; 1247 return mask; 1248} 1249 1250static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1251{ 1252 ap->pad_dma = 0; 1253 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1254 &ap->pad_dma, GFP_KERNEL); 1255 return (ap->pad == NULL) ? -ENOMEM : 0; 1256} 1257 1258static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1259{ 1260 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1261} 1262 1263static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1264{ 1265 return (struct ata_port *) &host->hostdata[0]; 1266} 1267 1268#endif /* __LINUX_LIBATA_H__ */ 1269