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 78 enum { 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 98 static 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? */ 111 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) 112 { 113 return &pdev->dev; 114 } 115 116 enum { 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 ATA_HOST_STARTED = (1 << 1), /* Host started */ 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_SOFTRESET = (1 << 16), /* already soft-reset this port */ 286 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 287 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 288 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 289 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 290 291 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 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 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 318 ATA_HORKAGE_DMA_RW_ONLY = (1 << 4), /* ATAPI DMA for RW only */ 319 }; 320 321 enum hsm_task_states { 322 HSM_ST_IDLE, /* no command on going */ 323 HSM_ST_FIRST, /* (waiting the device to) 324 write CDB or first data block */ 325 HSM_ST, /* (waiting the device to) transfer data */ 326 HSM_ST_LAST, /* (waiting the device to) complete command */ 327 HSM_ST_ERR, /* error */ 328 }; 329 330 enum ata_completion_errors { 331 AC_ERR_DEV = (1 << 0), /* device reported error */ 332 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 333 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 334 AC_ERR_MEDIA = (1 << 3), /* media error */ 335 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 336 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 337 AC_ERR_SYSTEM = (1 << 6), /* system error */ 338 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 339 AC_ERR_OTHER = (1 << 8), /* unknown */ 340 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 341 }; 342 343 /* forward declarations */ 344 struct scsi_device; 345 struct ata_port_operations; 346 struct ata_port; 347 struct ata_queued_cmd; 348 349 /* typedefs */ 350 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 351 typedef int (*ata_prereset_fn_t)(struct ata_port *ap); 352 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes); 353 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 354 355 struct ata_ioports { 356 void __iomem *cmd_addr; 357 void __iomem *data_addr; 358 void __iomem *error_addr; 359 void __iomem *feature_addr; 360 void __iomem *nsect_addr; 361 void __iomem *lbal_addr; 362 void __iomem *lbam_addr; 363 void __iomem *lbah_addr; 364 void __iomem *device_addr; 365 void __iomem *status_addr; 366 void __iomem *command_addr; 367 void __iomem *altstatus_addr; 368 void __iomem *ctl_addr; 369 void __iomem *bmdma_addr; 370 void __iomem *scr_addr; 371 }; 372 373 struct ata_host { 374 spinlock_t lock; 375 struct device *dev; 376 unsigned long irq; 377 unsigned long irq2; 378 void __iomem * const *iomap; 379 unsigned int n_ports; 380 void *private_data; 381 const struct ata_port_operations *ops; 382 unsigned long flags; 383 struct ata_port *simplex_claimed; /* channel owning the DMA */ 384 struct ata_port *ports[0]; 385 }; 386 387 struct ata_queued_cmd { 388 struct ata_port *ap; 389 struct ata_device *dev; 390 391 struct scsi_cmnd *scsicmd; 392 void (*scsidone)(struct scsi_cmnd *); 393 394 struct ata_taskfile tf; 395 u8 cdb[ATAPI_CDB_LEN]; 396 397 unsigned long flags; /* ATA_QCFLAG_xxx */ 398 unsigned int tag; 399 unsigned int n_elem; 400 unsigned int orig_n_elem; 401 402 int dma_dir; 403 404 unsigned int pad_len; 405 unsigned int sect_size; 406 407 unsigned int nbytes; 408 unsigned int curbytes; 409 410 unsigned int cursg; 411 unsigned int cursg_ofs; 412 413 struct scatterlist sgent; 414 struct scatterlist pad_sgent; 415 void *buf_virt; 416 417 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 418 struct scatterlist *__sg; 419 420 unsigned int err_mask; 421 struct ata_taskfile result_tf; 422 ata_qc_cb_t complete_fn; 423 424 void *private_data; 425 }; 426 427 struct ata_port_stats { 428 unsigned long unhandled_irq; 429 unsigned long idle_irq; 430 unsigned long rw_reqbuf; 431 }; 432 433 struct ata_ering_entry { 434 int is_io; 435 unsigned int err_mask; 436 u64 timestamp; 437 }; 438 439 struct ata_ering { 440 int cursor; 441 struct ata_ering_entry ring[ATA_ERING_SIZE]; 442 }; 443 444 struct ata_device { 445 struct ata_port *ap; 446 unsigned int devno; /* 0 or 1 */ 447 unsigned long flags; /* ATA_DFLAG_xxx */ 448 struct scsi_device *sdev; /* attached SCSI device */ 449 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 450 u64 n_sectors; /* size of device, if ATA */ 451 u64 n_sectors_boot; /* size of ATA device at startup */ 452 unsigned int class; /* ATA_DEV_xxx */ 453 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 454 u8 pio_mode; 455 u8 dma_mode; 456 u8 xfer_mode; 457 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 458 459 unsigned int multi_count; /* sectors count for 460 READ/WRITE MULTIPLE */ 461 unsigned int max_sectors; /* per-device max sectors */ 462 unsigned int cdb_len; 463 464 /* per-dev xfer mask */ 465 unsigned int pio_mask; 466 unsigned int mwdma_mask; 467 unsigned int udma_mask; 468 469 /* for CHS addressing */ 470 u16 cylinders; /* Number of cylinders */ 471 u16 heads; /* Number of heads */ 472 u16 sectors; /* Number of sectors per track */ 473 474 /* error history */ 475 struct ata_ering ering; 476 int spdn_cnt; 477 unsigned int horkage; /* List of broken features */ 478 #ifdef CONFIG_SATA_ACPI 479 /* ACPI objects info */ 480 acpi_handle obj_handle; 481 #endif 482 }; 483 484 /* Offset into struct ata_device. Fields above it are maintained 485 * acress device init. Fields below are zeroed. 486 */ 487 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 488 489 struct ata_eh_info { 490 struct ata_device *dev; /* offending device */ 491 u32 serror; /* SError from LLDD */ 492 unsigned int err_mask; /* port-wide err_mask */ 493 unsigned int action; /* ATA_EH_* action mask */ 494 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 495 unsigned int flags; /* ATA_EHI_* flags */ 496 497 unsigned long hotplug_timestamp; 498 unsigned int probe_mask; 499 500 char desc[ATA_EH_DESC_LEN]; 501 int desc_len; 502 }; 503 504 struct ata_eh_context { 505 struct ata_eh_info i; 506 int tries[ATA_MAX_DEVICES]; 507 unsigned int classes[ATA_MAX_DEVICES]; 508 unsigned int did_probe_mask; 509 }; 510 511 struct ata_port { 512 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 513 const struct ata_port_operations *ops; 514 spinlock_t *lock; 515 unsigned long flags; /* ATA_FLAG_xxx */ 516 unsigned int pflags; /* ATA_PFLAG_xxx */ 517 unsigned int print_id; /* user visible unique port ID */ 518 unsigned int port_no; /* 0 based port no. inside the host */ 519 520 struct ata_prd *prd; /* our SG list */ 521 dma_addr_t prd_dma; /* and its DMA mapping */ 522 523 void *pad; /* array of DMA pad buffers */ 524 dma_addr_t pad_dma; 525 526 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 527 528 u8 ctl; /* cache of ATA control register */ 529 u8 last_ctl; /* Cache last written value */ 530 unsigned int pio_mask; 531 unsigned int mwdma_mask; 532 unsigned int udma_mask; 533 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 534 unsigned int hw_sata_spd_limit; 535 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 536 537 /* record runtime error info, protected by host lock */ 538 struct ata_eh_info eh_info; 539 /* EH context owned by EH */ 540 struct ata_eh_context eh_context; 541 542 struct ata_device device[ATA_MAX_DEVICES]; 543 544 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 545 unsigned long qc_allocated; 546 unsigned int qc_active; 547 548 unsigned int active_tag; 549 u32 sactive; 550 551 struct ata_port_stats stats; 552 struct ata_host *host; 553 struct device *dev; 554 555 void *port_task_data; 556 struct delayed_work port_task; 557 struct delayed_work hotplug_task; 558 struct work_struct scsi_rescan_task; 559 560 unsigned int hsm_task_state; 561 562 u32 msg_enable; 563 struct list_head eh_done_q; 564 wait_queue_head_t eh_wait_q; 565 566 pm_message_t pm_mesg; 567 int *pm_result; 568 569 void *private_data; 570 571 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 572 }; 573 574 struct ata_port_operations { 575 void (*port_disable) (struct ata_port *); 576 577 void (*dev_config) (struct ata_device *); 578 579 void (*set_piomode) (struct ata_port *, struct ata_device *); 580 void (*set_dmamode) (struct ata_port *, struct ata_device *); 581 unsigned long (*mode_filter) (struct ata_device *, unsigned long); 582 583 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 584 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 585 586 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 587 u8 (*check_status)(struct ata_port *ap); 588 u8 (*check_altstatus)(struct ata_port *ap); 589 void (*dev_select)(struct ata_port *ap, unsigned int device); 590 591 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 592 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev); 593 594 void (*post_set_mode) (struct ata_port *ap); 595 596 int (*cable_detect) (struct ata_port *ap); 597 598 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 599 600 void (*bmdma_setup) (struct ata_queued_cmd *qc); 601 void (*bmdma_start) (struct ata_queued_cmd *qc); 602 603 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 604 605 void (*qc_prep) (struct ata_queued_cmd *qc); 606 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 607 608 /* Error handlers. ->error_handler overrides ->eng_timeout and 609 * indicates that new-style EH is in place. 610 */ 611 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 612 613 void (*freeze) (struct ata_port *ap); 614 void (*thaw) (struct ata_port *ap); 615 void (*error_handler) (struct ata_port *ap); 616 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 617 618 irq_handler_t irq_handler; 619 void (*irq_clear) (struct ata_port *); 620 u8 (*irq_on) (struct ata_port *); 621 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq); 622 623 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 624 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 625 u32 val); 626 627 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 628 int (*port_resume) (struct ata_port *ap); 629 630 int (*port_start) (struct ata_port *ap); 631 void (*port_stop) (struct ata_port *ap); 632 633 void (*host_stop) (struct ata_host *host); 634 635 void (*bmdma_stop) (struct ata_queued_cmd *qc); 636 u8 (*bmdma_status) (struct ata_port *ap); 637 }; 638 639 struct ata_port_info { 640 struct scsi_host_template *sht; 641 unsigned long flags; 642 unsigned long pio_mask; 643 unsigned long mwdma_mask; 644 unsigned long udma_mask; 645 const struct ata_port_operations *port_ops; 646 irq_handler_t irq_handler; 647 void *private_data; 648 }; 649 650 struct ata_timing { 651 unsigned short mode; /* ATA mode */ 652 unsigned short setup; /* t1 */ 653 unsigned short act8b; /* t2 for 8-bit I/O */ 654 unsigned short rec8b; /* t2i for 8-bit I/O */ 655 unsigned short cyc8b; /* t0 for 8-bit I/O */ 656 unsigned short active; /* t2 or tD */ 657 unsigned short recover; /* t2i or tK */ 658 unsigned short cycle; /* t0 */ 659 unsigned short udma; /* t2CYCTYP/2 */ 660 }; 661 662 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 663 664 extern const unsigned long sata_deb_timing_normal[]; 665 extern const unsigned long sata_deb_timing_hotplug[]; 666 extern const unsigned long sata_deb_timing_long[]; 667 668 extern const struct ata_port_operations ata_dummy_port_ops; 669 extern const struct ata_port_info ata_dummy_port_info; 670 671 static inline const unsigned long * 672 sata_ehc_deb_timing(struct ata_eh_context *ehc) 673 { 674 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 675 return sata_deb_timing_hotplug; 676 else 677 return sata_deb_timing_normal; 678 } 679 680 static inline int ata_port_is_dummy(struct ata_port *ap) 681 { 682 return ap->ops == &ata_dummy_port_ops; 683 } 684 685 extern void sata_print_link_status(struct ata_port *ap); 686 extern void ata_port_probe(struct ata_port *); 687 extern void __sata_phy_reset(struct ata_port *ap); 688 extern void sata_phy_reset(struct ata_port *ap); 689 extern void ata_bus_reset(struct ata_port *ap); 690 extern int sata_set_spd(struct ata_port *ap); 691 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param); 692 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param); 693 extern int ata_std_prereset(struct ata_port *ap); 694 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); 695 extern int sata_port_hardreset(struct ata_port *ap, 696 const unsigned long *timing); 697 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); 698 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 699 extern void ata_port_disable(struct ata_port *); 700 extern void ata_std_ports(struct ata_ioports *ioaddr); 701 #ifdef CONFIG_PCI 702 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 703 unsigned int n_ports); 704 extern void ata_pci_remove_one (struct pci_dev *pdev); 705 #ifdef CONFIG_PM 706 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 707 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 708 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 709 extern int ata_pci_device_resume(struct pci_dev *pdev); 710 #endif 711 extern int ata_pci_clear_simplex(struct pci_dev *pdev); 712 #endif /* CONFIG_PCI */ 713 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 714 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 715 const struct ata_port_info * const * ppi, int n_ports); 716 extern int ata_host_start(struct ata_host *host); 717 extern int ata_host_register(struct ata_host *host, 718 struct scsi_host_template *sht); 719 extern int ata_host_activate(struct ata_host *host, int irq, 720 irq_handler_t irq_handler, unsigned long irq_flags, 721 struct scsi_host_template *sht); 722 extern void ata_host_detach(struct ata_host *host); 723 extern void ata_host_init(struct ata_host *, struct device *, 724 unsigned long, const struct ata_port_operations *); 725 extern int ata_scsi_detect(struct scsi_host_template *sht); 726 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 727 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 728 extern void ata_sas_port_destroy(struct ata_port *); 729 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 730 struct ata_port_info *, struct Scsi_Host *); 731 extern int ata_sas_port_init(struct ata_port *); 732 extern int ata_sas_port_start(struct ata_port *ap); 733 extern void ata_sas_port_stop(struct ata_port *ap); 734 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 735 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 736 struct ata_port *ap); 737 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 738 extern int sata_scr_valid(struct ata_port *ap); 739 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 740 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 741 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 742 extern int ata_port_online(struct ata_port *ap); 743 extern int ata_port_offline(struct ata_port *ap); 744 #ifdef CONFIG_PM 745 extern int ata_scsi_device_resume(struct scsi_device *); 746 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg); 747 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 748 extern void ata_host_resume(struct ata_host *host); 749 #endif 750 extern int ata_ratelimit(void); 751 extern int ata_busy_sleep(struct ata_port *ap, 752 unsigned long timeout_pat, unsigned long timeout); 753 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 754 void *data, unsigned long delay); 755 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 756 unsigned long interval_msec, 757 unsigned long timeout_msec); 758 extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *); 759 760 /* 761 * Default driver ops implementations 762 */ 763 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 764 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 765 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 766 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 767 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 768 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 769 extern u8 ata_check_status(struct ata_port *ap); 770 extern u8 ata_altstatus(struct ata_port *ap); 771 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 772 extern int ata_port_start (struct ata_port *ap); 773 extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 774 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 775 unsigned int buflen, int write_data); 776 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 777 unsigned int buflen, int write_data); 778 extern void ata_qc_prep(struct ata_queued_cmd *qc); 779 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 780 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 781 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 782 unsigned int buflen); 783 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 784 unsigned int n_elem); 785 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 786 extern void ata_dev_disable(struct ata_device *adev); 787 extern void ata_id_string(const u16 *id, unsigned char *s, 788 unsigned int ofs, unsigned int len); 789 extern void ata_id_c_string(const u16 *id, unsigned char *s, 790 unsigned int ofs, unsigned int len); 791 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); 792 extern unsigned long ata_device_blacklisted(const struct ata_device *dev); 793 extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 794 extern void ata_bmdma_start (struct ata_queued_cmd *qc); 795 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 796 extern u8 ata_bmdma_status(struct ata_port *ap); 797 extern void ata_bmdma_irq_clear(struct ata_port *ap); 798 extern void ata_bmdma_freeze(struct ata_port *ap); 799 extern void ata_bmdma_thaw(struct ata_port *ap); 800 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 801 ata_reset_fn_t softreset, 802 ata_reset_fn_t hardreset, 803 ata_postreset_fn_t postreset); 804 extern void ata_bmdma_error_handler(struct ata_port *ap); 805 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 806 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 807 u8 status, int in_wq); 808 extern void ata_qc_complete(struct ata_queued_cmd *qc); 809 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 810 void (*finish_qc)(struct ata_queued_cmd *)); 811 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 812 void (*done)(struct scsi_cmnd *)); 813 extern int ata_std_bios_param(struct scsi_device *sdev, 814 struct block_device *bdev, 815 sector_t capacity, int geom[]); 816 extern int ata_scsi_slave_config(struct scsi_device *sdev); 817 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 818 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 819 int queue_depth); 820 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 821 extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev); 822 extern u8 ata_irq_on(struct ata_port *ap); 823 extern u8 ata_dummy_irq_on(struct ata_port *ap); 824 extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); 825 extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); 826 827 extern int ata_cable_40wire(struct ata_port *ap); 828 extern int ata_cable_80wire(struct ata_port *ap); 829 extern int ata_cable_sata(struct ata_port *ap); 830 extern int ata_cable_unknown(struct ata_port *ap); 831 832 /* 833 * Timing helpers 834 */ 835 836 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 837 extern int ata_timing_compute(struct ata_device *, unsigned short, 838 struct ata_timing *, int, int); 839 extern void ata_timing_merge(const struct ata_timing *, 840 const struct ata_timing *, struct ata_timing *, 841 unsigned int); 842 843 enum { 844 ATA_TIMING_SETUP = (1 << 0), 845 ATA_TIMING_ACT8B = (1 << 1), 846 ATA_TIMING_REC8B = (1 << 2), 847 ATA_TIMING_CYC8B = (1 << 3), 848 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 849 ATA_TIMING_CYC8B, 850 ATA_TIMING_ACTIVE = (1 << 4), 851 ATA_TIMING_RECOVER = (1 << 5), 852 ATA_TIMING_CYCLE = (1 << 6), 853 ATA_TIMING_UDMA = (1 << 7), 854 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 855 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 856 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 857 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 858 }; 859 860 861 #ifdef CONFIG_PCI 862 struct pci_bits { 863 unsigned int reg; /* PCI config register to read */ 864 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 865 unsigned long mask; 866 unsigned long val; 867 }; 868 869 extern int ata_pci_init_native_host(struct ata_host *host, 870 unsigned int port_mask); 871 extern int ata_pci_prepare_native_host(struct pci_dev *pdev, 872 const struct ata_port_info * const * ppi, 873 int n_ports, struct ata_host **r_host); 874 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 875 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); 876 #endif /* CONFIG_PCI */ 877 878 /* 879 * EH 880 */ 881 extern void ata_eng_timeout(struct ata_port *ap); 882 883 extern void ata_port_schedule_eh(struct ata_port *ap); 884 extern int ata_port_abort(struct ata_port *ap); 885 extern int ata_port_freeze(struct ata_port *ap); 886 887 extern void ata_eh_freeze_port(struct ata_port *ap); 888 extern void ata_eh_thaw_port(struct ata_port *ap); 889 890 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 891 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 892 893 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 894 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 895 ata_postreset_fn_t postreset); 896 897 /* 898 * printk helpers 899 */ 900 #define ata_port_printk(ap, lv, fmt, args...) \ 901 printk(lv"ata%u: "fmt, (ap)->print_id , ##args) 902 903 #define ata_dev_printk(dev, lv, fmt, args...) \ 904 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args) 905 906 /* 907 * ata_eh_info helpers 908 */ 909 #define ata_ehi_push_desc(ehi, fmt, args...) do { \ 910 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 911 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 912 fmt , ##args); \ 913 } while (0) 914 915 #define ata_ehi_clear_desc(ehi) do { \ 916 (ehi)->desc[0] = '\0'; \ 917 (ehi)->desc_len = 0; \ 918 } while (0) 919 920 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi) 921 { 922 if (ehi->flags & ATA_EHI_HOTPLUGGED) 923 return; 924 925 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK; 926 ehi->hotplug_timestamp = jiffies; 927 928 ehi->action |= ATA_EH_SOFTRESET; 929 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 930 } 931 932 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 933 { 934 __ata_ehi_hotplugged(ehi); 935 ehi->err_mask |= AC_ERR_ATA_BUS; 936 } 937 938 /* 939 * qc helpers 940 */ 941 static inline int 942 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 943 { 944 if (sg == &qc->pad_sgent) 945 return 1; 946 if (qc->pad_len) 947 return 0; 948 if (((sg - qc->__sg) + 1) == qc->n_elem) 949 return 1; 950 return 0; 951 } 952 953 static inline struct scatterlist * 954 ata_qc_first_sg(struct ata_queued_cmd *qc) 955 { 956 if (qc->n_elem) 957 return qc->__sg; 958 if (qc->pad_len) 959 return &qc->pad_sgent; 960 return NULL; 961 } 962 963 static inline struct scatterlist * 964 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 965 { 966 if (sg == &qc->pad_sgent) 967 return NULL; 968 if (++sg - qc->__sg < qc->n_elem) 969 return sg; 970 if (qc->pad_len) 971 return &qc->pad_sgent; 972 return NULL; 973 } 974 975 #define ata_for_each_sg(sg, qc) \ 976 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 977 978 static inline unsigned int ata_tag_valid(unsigned int tag) 979 { 980 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 981 } 982 983 static inline unsigned int ata_tag_internal(unsigned int tag) 984 { 985 return tag == ATA_MAX_QUEUE - 1; 986 } 987 988 /* 989 * device helpers 990 */ 991 static inline unsigned int ata_class_enabled(unsigned int class) 992 { 993 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 994 } 995 996 static inline unsigned int ata_class_disabled(unsigned int class) 997 { 998 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 999 } 1000 1001 static inline unsigned int ata_class_absent(unsigned int class) 1002 { 1003 return !ata_class_enabled(class) && !ata_class_disabled(class); 1004 } 1005 1006 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1007 { 1008 return ata_class_enabled(dev->class); 1009 } 1010 1011 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1012 { 1013 return ata_class_disabled(dev->class); 1014 } 1015 1016 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1017 { 1018 return ata_class_absent(dev->class); 1019 } 1020 1021 static inline unsigned int ata_dev_ready(const struct ata_device *dev) 1022 { 1023 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED); 1024 } 1025 1026 /* 1027 * port helpers 1028 */ 1029 static inline int ata_port_max_devices(const struct ata_port *ap) 1030 { 1031 if (ap->flags & ATA_FLAG_SLAVE_POSS) 1032 return 2; 1033 return 1; 1034 } 1035 1036 1037 static inline u8 ata_chk_status(struct ata_port *ap) 1038 { 1039 return ap->ops->check_status(ap); 1040 } 1041 1042 /** 1043 * ata_ncq_enabled - Test whether NCQ is enabled 1044 * @dev: ATA device to test for 1045 * 1046 * LOCKING: 1047 * spin_lock_irqsave(host lock) 1048 * 1049 * RETURNS: 1050 * 1 if NCQ is enabled for @dev, 0 otherwise. 1051 */ 1052 static inline int ata_ncq_enabled(struct ata_device *dev) 1053 { 1054 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1055 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1056 } 1057 1058 /** 1059 * ata_pause - Flush writes and pause 400 nanoseconds. 1060 * @ap: Port to wait for. 1061 * 1062 * LOCKING: 1063 * Inherited from caller. 1064 */ 1065 1066 static inline void ata_pause(struct ata_port *ap) 1067 { 1068 ata_altstatus(ap); 1069 ndelay(400); 1070 } 1071 1072 1073 /** 1074 * ata_busy_wait - Wait for a port status register 1075 * @ap: Port to wait for. 1076 * @bits: bits that must be clear 1077 * @max: number of 10uS waits to perform 1078 * 1079 * Waits up to max*10 microseconds for the selected bits in the port's 1080 * status register to be cleared. 1081 * Returns final value of status register. 1082 * 1083 * LOCKING: 1084 * Inherited from caller. 1085 */ 1086 1087 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1088 unsigned int max) 1089 { 1090 u8 status; 1091 1092 do { 1093 udelay(10); 1094 status = ata_chk_status(ap); 1095 max--; 1096 } while (status != 0xff && (status & bits) && (max > 0)); 1097 1098 return status; 1099 } 1100 1101 1102 /** 1103 * ata_wait_idle - Wait for a port to be idle. 1104 * @ap: Port to wait for. 1105 * 1106 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1107 * Returns final value of status register. 1108 * 1109 * LOCKING: 1110 * Inherited from caller. 1111 */ 1112 1113 static inline u8 ata_wait_idle(struct ata_port *ap) 1114 { 1115 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1116 1117 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) { 1118 if (ata_msg_warn(ap)) 1119 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n", 1120 status, ap->ioaddr.status_addr); 1121 } 1122 1123 return status; 1124 } 1125 1126 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1127 { 1128 qc->tf.ctl |= ATA_NIEN; 1129 } 1130 1131 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1132 unsigned int tag) 1133 { 1134 if (likely(ata_tag_valid(tag))) 1135 return &ap->qcmd[tag]; 1136 return NULL; 1137 } 1138 1139 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1140 unsigned int tag) 1141 { 1142 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1143 1144 if (unlikely(!qc) || !ap->ops->error_handler) 1145 return qc; 1146 1147 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1148 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1149 return qc; 1150 1151 return NULL; 1152 } 1153 1154 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1155 { 1156 memset(tf, 0, sizeof(*tf)); 1157 1158 tf->ctl = dev->ap->ctl; 1159 if (dev->devno == 0) 1160 tf->device = ATA_DEVICE_OBS; 1161 else 1162 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1163 } 1164 1165 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1166 { 1167 qc->dma_dir = DMA_NONE; 1168 qc->__sg = NULL; 1169 qc->flags = 0; 1170 qc->cursg = qc->cursg_ofs = 0; 1171 qc->nbytes = qc->curbytes = 0; 1172 qc->n_elem = 0; 1173 qc->err_mask = 0; 1174 qc->pad_len = 0; 1175 qc->sect_size = ATA_SECT_SIZE; 1176 1177 ata_tf_init(qc->dev, &qc->tf); 1178 1179 /* init result_tf such that it indicates normal completion */ 1180 qc->result_tf.command = ATA_DRDY; 1181 qc->result_tf.feature = 0; 1182 } 1183 1184 static inline int ata_try_flush_cache(const struct ata_device *dev) 1185 { 1186 return ata_id_wcache_enabled(dev->id) || 1187 ata_id_has_flush(dev->id) || 1188 ata_id_has_flush_ext(dev->id); 1189 } 1190 1191 static inline unsigned int ac_err_mask(u8 status) 1192 { 1193 if (status & (ATA_BUSY | ATA_DRQ)) 1194 return AC_ERR_HSM; 1195 if (status & (ATA_ERR | ATA_DF)) 1196 return AC_ERR_DEV; 1197 return 0; 1198 } 1199 1200 static inline unsigned int __ac_err_mask(u8 status) 1201 { 1202 unsigned int mask = ac_err_mask(status); 1203 if (mask == 0) 1204 return AC_ERR_OTHER; 1205 return mask; 1206 } 1207 1208 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1209 { 1210 ap->pad_dma = 0; 1211 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1212 &ap->pad_dma, GFP_KERNEL); 1213 return (ap->pad == NULL) ? -ENOMEM : 0; 1214 } 1215 1216 static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1217 { 1218 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1219 } 1220 1221 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1222 { 1223 return *(struct ata_port **)&host->hostdata[0]; 1224 } 1225 1226 #endif /* __LINUX_LIBATA_H__ */ 1227