libata.h revision 5a5dbd18a7496ed403f6f54bb20c955c65482fa5
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_SUSPENDED = (1 << 10), /* device suspended */ 144 ATA_DFLAG_INIT_MASK = (1 << 16) - 1, 145 146 ATA_DFLAG_DETACH = (1 << 16), 147 ATA_DFLAG_DETACHED = (1 << 17), 148 149 ATA_DEV_UNKNOWN = 0, /* unknown device */ 150 ATA_DEV_ATA = 1, /* ATA device */ 151 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 152 ATA_DEV_ATAPI = 3, /* ATAPI device */ 153 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 154 ATA_DEV_NONE = 5, /* no device */ 155 156 /* struct ata_port flags */ 157 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 158 /* (doesn't imply presence) */ 159 ATA_FLAG_SATA = (1 << 1), 160 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 161 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 162 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 163 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 164 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 165 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 166 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 167 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 168 * doesn't handle PIO interrupts */ 169 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 170 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ 171 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H 172 * Register FIS clearing BSY */ 173 ATA_FLAG_DEBUGMSG = (1 << 13), 174 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */ 175 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 176 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 177 178 /* The following flag belongs to ap->pflags but is kept in 179 * ap->flags because it's referenced in many LLDs and will be 180 * removed in not-too-distant future. 181 */ 182 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 183 184 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 185 186 /* struct ata_port pflags */ 187 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 188 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 189 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 190 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 191 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 192 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 193 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 194 195 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */ 196 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 197 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 198 199 /* struct ata_queued_cmd flags */ 200 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 201 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 202 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 203 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 204 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 205 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 206 207 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 208 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 209 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 210 211 /* host set flags */ 212 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 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 /* masks for port functions */ 257 ATA_PORT_PRIMARY = (1 << 0), 258 ATA_PORT_SECONDARY = (1 << 1), 259 260 /* ering size */ 261 ATA_ERING_SIZE = 32, 262 263 /* desc_len for ata_eh_info and context */ 264 ATA_EH_DESC_LEN = 80, 265 266 /* reset / recovery action types */ 267 ATA_EH_REVALIDATE = (1 << 0), 268 ATA_EH_SOFTRESET = (1 << 1), 269 ATA_EH_HARDRESET = (1 << 2), 270 ATA_EH_SUSPEND = (1 << 3), 271 ATA_EH_RESUME = (1 << 4), 272 ATA_EH_PM_FREEZE = (1 << 5), 273 274 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 275 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND | 276 ATA_EH_RESUME | ATA_EH_PM_FREEZE, 277 278 /* ata_eh_info->flags */ 279 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 280 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ 281 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 282 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 283 284 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */ 285 ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */ 286 ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */ 287 ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */ 288 289 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, 290 291 /* max repeat if error condition is still set after ->error_handler */ 292 ATA_EH_MAX_REPEAT = 5, 293 294 /* how hard are we gonna try to probe/recover devices */ 295 ATA_PROBE_MAX_TRIES = 3, 296 ATA_EH_RESET_TRIES = 3, 297 ATA_EH_DEV_TRIES = 3, 298 299 /* Drive spinup time (time from power-on to the first D2H FIS) 300 * in msecs - 8s currently. Failing to get ready in this time 301 * isn't critical. It will result in reset failure for 302 * controllers which can't wait for the first D2H FIS. libata 303 * will retry, so it just has to be long enough to spin up 304 * most devices. 305 */ 306 ATA_SPINUP_WAIT = 8000, 307 308 /* Horkage types. May be set by libata or controller on drives 309 (some horkage may be drive/controller pair dependant */ 310 311 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 312 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 313 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 314 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 315 ATA_HORKAGE_DMA_RW_ONLY = (1 << 4), /* ATAPI DMA for RW only */ 316}; 317 318enum hsm_task_states { 319 HSM_ST_IDLE, /* no command on going */ 320 HSM_ST_FIRST, /* (waiting the device to) 321 write CDB or first data block */ 322 HSM_ST, /* (waiting the device to) transfer data */ 323 HSM_ST_LAST, /* (waiting the device to) complete command */ 324 HSM_ST_ERR, /* error */ 325}; 326 327enum ata_completion_errors { 328 AC_ERR_DEV = (1 << 0), /* device reported error */ 329 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 330 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 331 AC_ERR_MEDIA = (1 << 3), /* media error */ 332 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 333 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 334 AC_ERR_SYSTEM = (1 << 6), /* system error */ 335 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 336 AC_ERR_OTHER = (1 << 8), /* unknown */ 337 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 338}; 339 340/* forward declarations */ 341struct scsi_device; 342struct ata_port_operations; 343struct ata_port; 344struct ata_queued_cmd; 345 346/* typedefs */ 347typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 348typedef int (*ata_prereset_fn_t)(struct ata_port *ap); 349typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes); 350typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 351 352struct ata_ioports { 353 void __iomem *cmd_addr; 354 void __iomem *data_addr; 355 void __iomem *error_addr; 356 void __iomem *feature_addr; 357 void __iomem *nsect_addr; 358 void __iomem *lbal_addr; 359 void __iomem *lbam_addr; 360 void __iomem *lbah_addr; 361 void __iomem *device_addr; 362 void __iomem *status_addr; 363 void __iomem *command_addr; 364 void __iomem *altstatus_addr; 365 void __iomem *ctl_addr; 366 void __iomem *bmdma_addr; 367 void __iomem *scr_addr; 368}; 369 370struct ata_probe_ent { 371 struct list_head node; 372 struct device *dev; 373 const struct ata_port_operations *port_ops; 374 struct scsi_host_template *sht; 375 struct ata_ioports port[ATA_MAX_PORTS]; 376 unsigned int n_ports; 377 unsigned int dummy_port_mask; 378 unsigned int pio_mask; 379 unsigned int mwdma_mask; 380 unsigned int udma_mask; 381 unsigned long irq; 382 unsigned long irq2; 383 unsigned int irq_flags; 384 unsigned long port_flags; 385 unsigned long _host_flags; 386 void __iomem * const *iomap; 387 void *private_data; 388 389 /* port_info for the secondary port. Together with irq2, it's 390 * used to implement non-uniform secondary port. Currently, 391 * the only user is ata_piix combined mode. This workaround 392 * will be removed together with ata_probe_ent when init model 393 * is updated. 394 */ 395 const struct ata_port_info *pinfo2; 396}; 397 398struct ata_host { 399 spinlock_t lock; 400 struct device *dev; 401 unsigned long irq; 402 unsigned long irq2; 403 void __iomem * const *iomap; 404 unsigned int n_ports; 405 void *private_data; 406 const struct ata_port_operations *ops; 407 unsigned long flags; 408 struct ata_port *simplex_claimed; /* channel owning the DMA */ 409 struct ata_port *ports[0]; 410}; 411 412struct ata_queued_cmd { 413 struct ata_port *ap; 414 struct ata_device *dev; 415 416 struct scsi_cmnd *scsicmd; 417 void (*scsidone)(struct scsi_cmnd *); 418 419 struct ata_taskfile tf; 420 u8 cdb[ATAPI_CDB_LEN]; 421 422 unsigned long flags; /* ATA_QCFLAG_xxx */ 423 unsigned int tag; 424 unsigned int n_elem; 425 unsigned int orig_n_elem; 426 427 int dma_dir; 428 429 unsigned int pad_len; 430 unsigned int sect_size; 431 432 unsigned int nbytes; 433 unsigned int curbytes; 434 435 unsigned int cursg; 436 unsigned int cursg_ofs; 437 438 struct scatterlist sgent; 439 struct scatterlist pad_sgent; 440 void *buf_virt; 441 442 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 443 struct scatterlist *__sg; 444 445 unsigned int err_mask; 446 struct ata_taskfile result_tf; 447 ata_qc_cb_t complete_fn; 448 449 void *private_data; 450}; 451 452struct ata_port_stats { 453 unsigned long unhandled_irq; 454 unsigned long idle_irq; 455 unsigned long rw_reqbuf; 456}; 457 458struct ata_ering_entry { 459 int is_io; 460 unsigned int err_mask; 461 u64 timestamp; 462}; 463 464struct ata_ering { 465 int cursor; 466 struct ata_ering_entry ring[ATA_ERING_SIZE]; 467}; 468 469struct ata_device { 470 struct ata_port *ap; 471 unsigned int devno; /* 0 or 1 */ 472 unsigned long flags; /* ATA_DFLAG_xxx */ 473 struct scsi_device *sdev; /* attached SCSI device */ 474 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 475 u64 n_sectors; /* size of device, if ATA */ 476 unsigned int class; /* ATA_DEV_xxx */ 477 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 478 u8 pio_mode; 479 u8 dma_mode; 480 u8 xfer_mode; 481 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 482 483 unsigned int multi_count; /* sectors count for 484 READ/WRITE MULTIPLE */ 485 unsigned int max_sectors; /* per-device max sectors */ 486 unsigned int cdb_len; 487 488 /* per-dev xfer mask */ 489 unsigned int pio_mask; 490 unsigned int mwdma_mask; 491 unsigned int udma_mask; 492 493 /* for CHS addressing */ 494 u16 cylinders; /* Number of cylinders */ 495 u16 heads; /* Number of heads */ 496 u16 sectors; /* Number of sectors per track */ 497 498 /* error history */ 499 struct ata_ering ering; 500 int spdn_cnt; 501 unsigned int horkage; /* List of broken features */ 502#ifdef CONFIG_SATA_ACPI 503 /* ACPI objects info */ 504 acpi_handle obj_handle; 505#endif 506}; 507 508/* Offset into struct ata_device. Fields above it are maintained 509 * acress device init. Fields below are zeroed. 510 */ 511#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 512 513struct ata_eh_info { 514 struct ata_device *dev; /* offending device */ 515 u32 serror; /* SError from LLDD */ 516 unsigned int err_mask; /* port-wide err_mask */ 517 unsigned int action; /* ATA_EH_* action mask */ 518 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 519 unsigned int flags; /* ATA_EHI_* flags */ 520 521 unsigned long hotplug_timestamp; 522 unsigned int probe_mask; 523 524 char desc[ATA_EH_DESC_LEN]; 525 int desc_len; 526}; 527 528struct ata_eh_context { 529 struct ata_eh_info i; 530 int tries[ATA_MAX_DEVICES]; 531 unsigned int classes[ATA_MAX_DEVICES]; 532 unsigned int did_probe_mask; 533}; 534 535struct ata_port { 536 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 537 const struct ata_port_operations *ops; 538 spinlock_t *lock; 539 unsigned long flags; /* ATA_FLAG_xxx */ 540 unsigned int pflags; /* ATA_PFLAG_xxx */ 541 unsigned int print_id; /* user visible unique port ID */ 542 unsigned int port_no; /* 0 based port no. inside the host */ 543 544 struct ata_prd *prd; /* our SG list */ 545 dma_addr_t prd_dma; /* and its DMA mapping */ 546 547 void *pad; /* array of DMA pad buffers */ 548 dma_addr_t pad_dma; 549 550 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 551 552 u8 ctl; /* cache of ATA control register */ 553 u8 last_ctl; /* Cache last written value */ 554 unsigned int pio_mask; 555 unsigned int mwdma_mask; 556 unsigned int udma_mask; 557 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 558 unsigned int hw_sata_spd_limit; 559 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 560 561 /* record runtime error info, protected by host lock */ 562 struct ata_eh_info eh_info; 563 /* EH context owned by EH */ 564 struct ata_eh_context eh_context; 565 566 struct ata_device device[ATA_MAX_DEVICES]; 567 568 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 569 unsigned long qc_allocated; 570 unsigned int qc_active; 571 572 unsigned int active_tag; 573 u32 sactive; 574 575 struct ata_port_stats stats; 576 struct ata_host *host; 577 struct device *dev; 578 579 void *port_task_data; 580 struct delayed_work port_task; 581 struct delayed_work hotplug_task; 582 struct work_struct scsi_rescan_task; 583 584 unsigned int hsm_task_state; 585 586 u32 msg_enable; 587 struct list_head eh_done_q; 588 wait_queue_head_t eh_wait_q; 589 590 pm_message_t pm_mesg; 591 int *pm_result; 592 593 void *private_data; 594 595 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 596}; 597 598struct ata_port_operations { 599 void (*port_disable) (struct ata_port *); 600 601 void (*dev_config) (struct ata_device *); 602 603 void (*set_piomode) (struct ata_port *, struct ata_device *); 604 void (*set_dmamode) (struct ata_port *, struct ata_device *); 605 unsigned long (*mode_filter) (struct ata_device *, unsigned long); 606 607 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 608 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 609 610 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 611 u8 (*check_status)(struct ata_port *ap); 612 u8 (*check_altstatus)(struct ata_port *ap); 613 void (*dev_select)(struct ata_port *ap, unsigned int device); 614 615 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 616 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev); 617 618 void (*post_set_mode) (struct ata_port *ap); 619 620 int (*cable_detect) (struct ata_port *ap); 621 622 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 623 624 void (*bmdma_setup) (struct ata_queued_cmd *qc); 625 void (*bmdma_start) (struct ata_queued_cmd *qc); 626 627 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 628 629 void (*qc_prep) (struct ata_queued_cmd *qc); 630 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 631 632 /* Error handlers. ->error_handler overrides ->eng_timeout and 633 * indicates that new-style EH is in place. 634 */ 635 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 636 637 void (*freeze) (struct ata_port *ap); 638 void (*thaw) (struct ata_port *ap); 639 void (*error_handler) (struct ata_port *ap); 640 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 641 642 irq_handler_t irq_handler; 643 void (*irq_clear) (struct ata_port *); 644 u8 (*irq_on) (struct ata_port *); 645 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq); 646 647 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 648 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 649 u32 val); 650 651 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 652 int (*port_resume) (struct ata_port *ap); 653 654 int (*port_start) (struct ata_port *ap); 655 void (*port_stop) (struct ata_port *ap); 656 657 void (*host_stop) (struct ata_host *host); 658 659 void (*bmdma_stop) (struct ata_queued_cmd *qc); 660 u8 (*bmdma_status) (struct ata_port *ap); 661}; 662 663struct ata_port_info { 664 struct scsi_host_template *sht; 665 unsigned long flags; 666 unsigned long pio_mask; 667 unsigned long mwdma_mask; 668 unsigned long udma_mask; 669 const struct ata_port_operations *port_ops; 670 void *private_data; 671}; 672 673struct ata_timing { 674 unsigned short mode; /* ATA mode */ 675 unsigned short setup; /* t1 */ 676 unsigned short act8b; /* t2 for 8-bit I/O */ 677 unsigned short rec8b; /* t2i for 8-bit I/O */ 678 unsigned short cyc8b; /* t0 for 8-bit I/O */ 679 unsigned short active; /* t2 or tD */ 680 unsigned short recover; /* t2i or tK */ 681 unsigned short cycle; /* t0 */ 682 unsigned short udma; /* t2CYCTYP/2 */ 683}; 684 685#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 686 687extern const unsigned long sata_deb_timing_normal[]; 688extern const unsigned long sata_deb_timing_hotplug[]; 689extern const unsigned long sata_deb_timing_long[]; 690 691extern const struct ata_port_operations ata_dummy_port_ops; 692 693static inline const unsigned long * 694sata_ehc_deb_timing(struct ata_eh_context *ehc) 695{ 696 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 697 return sata_deb_timing_hotplug; 698 else 699 return sata_deb_timing_normal; 700} 701 702static inline int ata_port_is_dummy(struct ata_port *ap) 703{ 704 return ap->ops == &ata_dummy_port_ops; 705} 706 707extern void sata_print_link_status(struct ata_port *ap); 708extern void ata_port_probe(struct ata_port *); 709extern void __sata_phy_reset(struct ata_port *ap); 710extern void sata_phy_reset(struct ata_port *ap); 711extern void ata_bus_reset(struct ata_port *ap); 712extern int sata_set_spd(struct ata_port *ap); 713extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param); 714extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param); 715extern int ata_std_prereset(struct ata_port *ap); 716extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); 717extern int sata_port_hardreset(struct ata_port *ap, 718 const unsigned long *timing); 719extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); 720extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 721extern void ata_port_disable(struct ata_port *); 722extern void ata_std_ports(struct ata_ioports *ioaddr); 723#ifdef CONFIG_PCI 724extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 725 unsigned int n_ports); 726extern void ata_pci_remove_one (struct pci_dev *pdev); 727#ifdef CONFIG_PM 728extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 729extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 730extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 731extern int ata_pci_device_resume(struct pci_dev *pdev); 732#endif 733extern int ata_pci_clear_simplex(struct pci_dev *pdev); 734#endif /* CONFIG_PCI */ 735extern int ata_device_add(const struct ata_probe_ent *ent); 736extern void ata_host_detach(struct ata_host *host); 737extern void ata_host_init(struct ata_host *, struct device *, 738 unsigned long, const struct ata_port_operations *); 739extern int ata_scsi_detect(struct scsi_host_template *sht); 740extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 741extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 742extern void ata_sas_port_destroy(struct ata_port *); 743extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 744 struct ata_port_info *, struct Scsi_Host *); 745extern int ata_sas_port_init(struct ata_port *); 746extern int ata_sas_port_start(struct ata_port *ap); 747extern void ata_sas_port_stop(struct ata_port *ap); 748extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 749extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 750 struct ata_port *ap); 751extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 752extern int sata_scr_valid(struct ata_port *ap); 753extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 754extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 755extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 756extern int ata_port_online(struct ata_port *ap); 757extern int ata_port_offline(struct ata_port *ap); 758#ifdef CONFIG_PM 759extern int ata_scsi_device_resume(struct scsi_device *); 760extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg); 761extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 762extern void ata_host_resume(struct ata_host *host); 763#endif 764extern int ata_ratelimit(void); 765extern int ata_busy_sleep(struct ata_port *ap, 766 unsigned long timeout_pat, unsigned long timeout); 767extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 768 void *data, unsigned long delay); 769extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 770 unsigned long interval_msec, 771 unsigned long timeout_msec); 772extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *); 773 774/* 775 * Default driver ops implementations 776 */ 777extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 778extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 779extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 780extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 781extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 782extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 783extern u8 ata_check_status(struct ata_port *ap); 784extern u8 ata_altstatus(struct ata_port *ap); 785extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 786extern int ata_port_start (struct ata_port *ap); 787extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 788extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 789 unsigned int buflen, int write_data); 790extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 791 unsigned int buflen, int write_data); 792extern void ata_qc_prep(struct ata_queued_cmd *qc); 793extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 794extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 795extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 796 unsigned int buflen); 797extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 798 unsigned int n_elem); 799extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 800extern void ata_dev_disable(struct ata_device *adev); 801extern void ata_id_string(const u16 *id, unsigned char *s, 802 unsigned int ofs, unsigned int len); 803extern void ata_id_c_string(const u16 *id, unsigned char *s, 804 unsigned int ofs, unsigned int len); 805extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); 806extern unsigned long ata_device_blacklisted(const struct ata_device *dev); 807extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 808extern void ata_bmdma_start (struct ata_queued_cmd *qc); 809extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 810extern u8 ata_bmdma_status(struct ata_port *ap); 811extern void ata_bmdma_irq_clear(struct ata_port *ap); 812extern void ata_bmdma_freeze(struct ata_port *ap); 813extern void ata_bmdma_thaw(struct ata_port *ap); 814extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 815 ata_reset_fn_t softreset, 816 ata_reset_fn_t hardreset, 817 ata_postreset_fn_t postreset); 818extern void ata_bmdma_error_handler(struct ata_port *ap); 819extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 820extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 821 u8 status, int in_wq); 822extern void ata_qc_complete(struct ata_queued_cmd *qc); 823extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 824 void (*finish_qc)(struct ata_queued_cmd *)); 825extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 826 void (*done)(struct scsi_cmnd *)); 827extern int ata_std_bios_param(struct scsi_device *sdev, 828 struct block_device *bdev, 829 sector_t capacity, int geom[]); 830extern int ata_scsi_slave_config(struct scsi_device *sdev); 831extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 832extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 833 int queue_depth); 834extern struct ata_device *ata_dev_pair(struct ata_device *adev); 835extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev); 836extern u8 ata_irq_on(struct ata_port *ap); 837extern u8 ata_dummy_irq_on(struct ata_port *ap); 838extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); 839extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); 840 841extern int ata_cable_40wire(struct ata_port *ap); 842extern int ata_cable_80wire(struct ata_port *ap); 843extern int ata_cable_sata(struct ata_port *ap); 844extern int ata_cable_unknown(struct ata_port *ap); 845 846/* 847 * Timing helpers 848 */ 849 850extern unsigned int ata_pio_need_iordy(const struct ata_device *); 851extern int ata_timing_compute(struct ata_device *, unsigned short, 852 struct ata_timing *, int, int); 853extern void ata_timing_merge(const struct ata_timing *, 854 const struct ata_timing *, struct ata_timing *, 855 unsigned int); 856 857enum { 858 ATA_TIMING_SETUP = (1 << 0), 859 ATA_TIMING_ACT8B = (1 << 1), 860 ATA_TIMING_REC8B = (1 << 2), 861 ATA_TIMING_CYC8B = (1 << 3), 862 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 863 ATA_TIMING_CYC8B, 864 ATA_TIMING_ACTIVE = (1 << 4), 865 ATA_TIMING_RECOVER = (1 << 5), 866 ATA_TIMING_CYCLE = (1 << 6), 867 ATA_TIMING_UDMA = (1 << 7), 868 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 869 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 870 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 871 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 872}; 873 874 875#ifdef CONFIG_PCI 876struct pci_bits { 877 unsigned int reg; /* PCI config register to read */ 878 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 879 unsigned long mask; 880 unsigned long val; 881}; 882 883extern struct ata_probe_ent * 884ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); 885extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 886extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); 887#endif /* CONFIG_PCI */ 888 889/* 890 * EH 891 */ 892extern void ata_eng_timeout(struct ata_port *ap); 893 894extern void ata_port_schedule_eh(struct ata_port *ap); 895extern int ata_port_abort(struct ata_port *ap); 896extern int ata_port_freeze(struct ata_port *ap); 897 898extern void ata_eh_freeze_port(struct ata_port *ap); 899extern void ata_eh_thaw_port(struct ata_port *ap); 900 901extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 902extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 903 904extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 905 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 906 ata_postreset_fn_t postreset); 907 908/* 909 * printk helpers 910 */ 911#define ata_port_printk(ap, lv, fmt, args...) \ 912 printk(lv"ata%u: "fmt, (ap)->print_id , ##args) 913 914#define ata_dev_printk(dev, lv, fmt, args...) \ 915 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args) 916 917/* 918 * ata_eh_info helpers 919 */ 920#define ata_ehi_push_desc(ehi, fmt, args...) do { \ 921 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 922 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 923 fmt , ##args); \ 924} while (0) 925 926#define ata_ehi_clear_desc(ehi) do { \ 927 (ehi)->desc[0] = '\0'; \ 928 (ehi)->desc_len = 0; \ 929} while (0) 930 931static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi) 932{ 933 if (ehi->flags & ATA_EHI_HOTPLUGGED) 934 return; 935 936 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK; 937 ehi->hotplug_timestamp = jiffies; 938 939 ehi->action |= ATA_EH_SOFTRESET; 940 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 941} 942 943static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 944{ 945 __ata_ehi_hotplugged(ehi); 946 ehi->err_mask |= AC_ERR_ATA_BUS; 947} 948 949/* 950 * qc helpers 951 */ 952static inline int 953ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 954{ 955 if (sg == &qc->pad_sgent) 956 return 1; 957 if (qc->pad_len) 958 return 0; 959 if (((sg - qc->__sg) + 1) == qc->n_elem) 960 return 1; 961 return 0; 962} 963 964static inline struct scatterlist * 965ata_qc_first_sg(struct ata_queued_cmd *qc) 966{ 967 if (qc->n_elem) 968 return qc->__sg; 969 if (qc->pad_len) 970 return &qc->pad_sgent; 971 return NULL; 972} 973 974static inline struct scatterlist * 975ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 976{ 977 if (sg == &qc->pad_sgent) 978 return NULL; 979 if (++sg - qc->__sg < qc->n_elem) 980 return sg; 981 if (qc->pad_len) 982 return &qc->pad_sgent; 983 return NULL; 984} 985 986#define ata_for_each_sg(sg, qc) \ 987 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 988 989static inline unsigned int ata_tag_valid(unsigned int tag) 990{ 991 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 992} 993 994static inline unsigned int ata_tag_internal(unsigned int tag) 995{ 996 return tag == ATA_MAX_QUEUE - 1; 997} 998 999/* 1000 * device helpers 1001 */ 1002static inline unsigned int ata_class_enabled(unsigned int class) 1003{ 1004 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 1005} 1006 1007static inline unsigned int ata_class_disabled(unsigned int class) 1008{ 1009 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 1010} 1011 1012static inline unsigned int ata_class_absent(unsigned int class) 1013{ 1014 return !ata_class_enabled(class) && !ata_class_disabled(class); 1015} 1016 1017static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1018{ 1019 return ata_class_enabled(dev->class); 1020} 1021 1022static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1023{ 1024 return ata_class_disabled(dev->class); 1025} 1026 1027static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1028{ 1029 return ata_class_absent(dev->class); 1030} 1031 1032static inline unsigned int ata_dev_ready(const struct ata_device *dev) 1033{ 1034 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED); 1035} 1036 1037/* 1038 * port helpers 1039 */ 1040static inline int ata_port_max_devices(const struct ata_port *ap) 1041{ 1042 if (ap->flags & ATA_FLAG_SLAVE_POSS) 1043 return 2; 1044 return 1; 1045} 1046 1047 1048static inline u8 ata_chk_status(struct ata_port *ap) 1049{ 1050 return ap->ops->check_status(ap); 1051} 1052 1053/** 1054 * ata_ncq_enabled - Test whether NCQ is enabled 1055 * @dev: ATA device to test for 1056 * 1057 * LOCKING: 1058 * spin_lock_irqsave(host lock) 1059 * 1060 * RETURNS: 1061 * 1 if NCQ is enabled for @dev, 0 otherwise. 1062 */ 1063static inline int ata_ncq_enabled(struct ata_device *dev) 1064{ 1065 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1066 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1067} 1068 1069/** 1070 * ata_pause - Flush writes and pause 400 nanoseconds. 1071 * @ap: Port to wait for. 1072 * 1073 * LOCKING: 1074 * Inherited from caller. 1075 */ 1076 1077static inline void ata_pause(struct ata_port *ap) 1078{ 1079 ata_altstatus(ap); 1080 ndelay(400); 1081} 1082 1083 1084/** 1085 * ata_busy_wait - Wait for a port status register 1086 * @ap: Port to wait for. 1087 * @bits: bits that must be clear 1088 * @max: number of 10uS waits to perform 1089 * 1090 * Waits up to max*10 microseconds for the selected bits in the port's 1091 * status register to be cleared. 1092 * Returns final value of status register. 1093 * 1094 * LOCKING: 1095 * Inherited from caller. 1096 */ 1097 1098static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1099 unsigned int max) 1100{ 1101 u8 status; 1102 1103 do { 1104 udelay(10); 1105 status = ata_chk_status(ap); 1106 max--; 1107 } while (status != 0xff && (status & bits) && (max > 0)); 1108 1109 return status; 1110} 1111 1112 1113/** 1114 * ata_wait_idle - Wait for a port to be idle. 1115 * @ap: Port to wait for. 1116 * 1117 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1118 * Returns final value of status register. 1119 * 1120 * LOCKING: 1121 * Inherited from caller. 1122 */ 1123 1124static inline u8 ata_wait_idle(struct ata_port *ap) 1125{ 1126 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1127 1128 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) { 1129 if (ata_msg_warn(ap)) 1130 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n", 1131 status, ap->ioaddr.status_addr); 1132 } 1133 1134 return status; 1135} 1136 1137static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1138{ 1139 qc->tf.ctl |= ATA_NIEN; 1140} 1141 1142static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1143 unsigned int tag) 1144{ 1145 if (likely(ata_tag_valid(tag))) 1146 return &ap->qcmd[tag]; 1147 return NULL; 1148} 1149 1150static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1151 unsigned int tag) 1152{ 1153 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1154 1155 if (unlikely(!qc) || !ap->ops->error_handler) 1156 return qc; 1157 1158 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1159 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1160 return qc; 1161 1162 return NULL; 1163} 1164 1165static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1166{ 1167 memset(tf, 0, sizeof(*tf)); 1168 1169 tf->ctl = dev->ap->ctl; 1170 if (dev->devno == 0) 1171 tf->device = ATA_DEVICE_OBS; 1172 else 1173 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1174} 1175 1176static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1177{ 1178 qc->dma_dir = DMA_NONE; 1179 qc->__sg = NULL; 1180 qc->flags = 0; 1181 qc->cursg = qc->cursg_ofs = 0; 1182 qc->nbytes = qc->curbytes = 0; 1183 qc->n_elem = 0; 1184 qc->err_mask = 0; 1185 qc->pad_len = 0; 1186 qc->sect_size = ATA_SECT_SIZE; 1187 1188 ata_tf_init(qc->dev, &qc->tf); 1189 1190 /* init result_tf such that it indicates normal completion */ 1191 qc->result_tf.command = ATA_DRDY; 1192 qc->result_tf.feature = 0; 1193} 1194 1195static inline int ata_try_flush_cache(const struct ata_device *dev) 1196{ 1197 return ata_id_wcache_enabled(dev->id) || 1198 ata_id_has_flush(dev->id) || 1199 ata_id_has_flush_ext(dev->id); 1200} 1201 1202static inline unsigned int ac_err_mask(u8 status) 1203{ 1204 if (status & (ATA_BUSY | ATA_DRQ)) 1205 return AC_ERR_HSM; 1206 if (status & (ATA_ERR | ATA_DF)) 1207 return AC_ERR_DEV; 1208 return 0; 1209} 1210 1211static inline unsigned int __ac_err_mask(u8 status) 1212{ 1213 unsigned int mask = ac_err_mask(status); 1214 if (mask == 0) 1215 return AC_ERR_OTHER; 1216 return mask; 1217} 1218 1219static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1220{ 1221 ap->pad_dma = 0; 1222 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1223 &ap->pad_dma, GFP_KERNEL); 1224 return (ap->pad == NULL) ? -ENOMEM : 0; 1225} 1226 1227static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1228{ 1229 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1230} 1231 1232static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1233{ 1234 return (struct ata_port *) &host->hostdata[0]; 1235} 1236 1237#endif /* __LINUX_LIBATA_H__ */ 1238