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 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ 120 ATA_MAX_PORTS = 8, 121 ATA_DEF_QUEUE = 1, 122 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 123 ATA_MAX_QUEUE = 32, 124 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 125 ATA_MAX_BUS = 2, 126 ATA_DEF_BUSY_WAIT = 10000, 127 ATA_SHORT_PAUSE = (HZ >> 6) + 1, 128 129 ATA_SHT_EMULATED = 1, 130 ATA_SHT_CMD_PER_LUN = 1, 131 ATA_SHT_THIS_ID = -1, 132 ATA_SHT_USE_CLUSTERING = 1, 133 134 /* struct ata_device stuff */ 135 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 136 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 137 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 138 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 139 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 140 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ 141 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ 142 ATA_DFLAG_CFG_MASK = (1 << 8) - 1, 143 144 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */ 145 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */ 146 ATA_DFLAG_SPUNDOWN = (1 << 10), /* XXX: for spindown_compat */ 147 ATA_DFLAG_INIT_MASK = (1 << 16) - 1, 148 149 ATA_DFLAG_DETACH = (1 << 16), 150 ATA_DFLAG_DETACHED = (1 << 17), 151 152 ATA_DEV_UNKNOWN = 0, /* unknown device */ 153 ATA_DEV_ATA = 1, /* ATA device */ 154 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 155 ATA_DEV_ATAPI = 3, /* ATAPI device */ 156 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 157 ATA_DEV_NONE = 5, /* no device */ 158 159 /* struct ata_port flags */ 160 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 161 /* (doesn't imply presence) */ 162 ATA_FLAG_SATA = (1 << 1), 163 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 164 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 165 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 166 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 167 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 168 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 169 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 170 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 171 * doesn't handle PIO interrupts */ 172 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 173 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ 174 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H 175 * Register FIS clearing BSY */ 176 ATA_FLAG_DEBUGMSG = (1 << 13), 177 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 178 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ 179 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ 180 181 /* The following flag belongs to ap->pflags but is kept in 182 * ap->flags because it's referenced in many LLDs and will be 183 * removed in not-too-distant future. 184 */ 185 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 186 187 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 188 189 /* struct ata_port pflags */ 190 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 191 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 192 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 193 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 194 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 195 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 196 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 197 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ 198 199 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */ 200 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 201 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 202 ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */ 203 204 /* struct ata_queued_cmd flags */ 205 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 206 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 207 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 208 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 209 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 210 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 211 212 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 213 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 214 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 215 216 /* host set flags */ 217 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 218 ATA_HOST_STARTED = (1 << 1), /* Host started */ 219 220 /* various lengths of time */ 221 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 222 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 223 ATA_TMOUT_INTERNAL = 30 * HZ, 224 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 225 226 /* ATA bus states */ 227 BUS_UNKNOWN = 0, 228 BUS_DMA = 1, 229 BUS_IDLE = 2, 230 BUS_NOINTR = 3, 231 BUS_NODATA = 4, 232 BUS_TIMER = 5, 233 BUS_PIO = 6, 234 BUS_EDD = 7, 235 BUS_IDENTIFY = 8, 236 BUS_PACKET = 9, 237 238 /* SATA port states */ 239 PORT_UNKNOWN = 0, 240 PORT_ENABLED = 1, 241 PORT_DISABLED = 2, 242 243 /* encoding various smaller bitmaps into a single 244 * unsigned int bitmap 245 */ 246 ATA_BITS_PIO = 7, 247 ATA_BITS_MWDMA = 5, 248 ATA_BITS_UDMA = 8, 249 250 ATA_SHIFT_PIO = 0, 251 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, 252 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, 253 254 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, 255 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, 256 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, 257 258 /* size of buffer to pad xfers ending on unaligned boundaries */ 259 ATA_DMA_PAD_SZ = 4, 260 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 261 262 /* ering size */ 263 ATA_ERING_SIZE = 32, 264 265 /* desc_len for ata_eh_info and context */ 266 ATA_EH_DESC_LEN = 80, 267 268 /* reset / recovery action types */ 269 ATA_EH_REVALIDATE = (1 << 0), 270 ATA_EH_SOFTRESET = (1 << 1), 271 ATA_EH_HARDRESET = (1 << 2), 272 273 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 274 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, 275 276 /* ata_eh_info->flags */ 277 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 278 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ 279 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ 280 ATA_EHI_QUIET = (1 << 3), /* be quiet */ 281 282 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ 283 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ 284 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ 285 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ 286 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ 287 288 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, 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_DEV_TRIES = 3, 297 298 /* Horkage types. May be set by libata or controller on drives 299 (some horkage may be drive/controller pair dependant */ 300 301 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 302 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 303 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 304 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ 305 }; 306 307 enum hsm_task_states { 308 HSM_ST_IDLE, /* no command on going */ 309 HSM_ST_FIRST, /* (waiting the device to) 310 write CDB or first data block */ 311 HSM_ST, /* (waiting the device to) transfer data */ 312 HSM_ST_LAST, /* (waiting the device to) complete command */ 313 HSM_ST_ERR, /* error */ 314 }; 315 316 enum ata_completion_errors { 317 AC_ERR_DEV = (1 << 0), /* device reported error */ 318 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 319 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 320 AC_ERR_MEDIA = (1 << 3), /* media error */ 321 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 322 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 323 AC_ERR_SYSTEM = (1 << 6), /* system error */ 324 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 325 AC_ERR_OTHER = (1 << 8), /* unknown */ 326 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 327 }; 328 329 /* forward declarations */ 330 struct scsi_device; 331 struct ata_port_operations; 332 struct ata_port; 333 struct ata_queued_cmd; 334 335 /* typedefs */ 336 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 337 typedef int (*ata_prereset_fn_t)(struct ata_port *ap, unsigned long deadline); 338 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes, 339 unsigned long deadline); 340 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 341 342 struct ata_ioports { 343 void __iomem *cmd_addr; 344 void __iomem *data_addr; 345 void __iomem *error_addr; 346 void __iomem *feature_addr; 347 void __iomem *nsect_addr; 348 void __iomem *lbal_addr; 349 void __iomem *lbam_addr; 350 void __iomem *lbah_addr; 351 void __iomem *device_addr; 352 void __iomem *status_addr; 353 void __iomem *command_addr; 354 void __iomem *altstatus_addr; 355 void __iomem *ctl_addr; 356 void __iomem *bmdma_addr; 357 void __iomem *scr_addr; 358 }; 359 360 struct ata_host { 361 spinlock_t lock; 362 struct device *dev; 363 unsigned long irq; 364 unsigned long irq2; 365 void __iomem * const *iomap; 366 unsigned int n_ports; 367 void *private_data; 368 const struct ata_port_operations *ops; 369 unsigned long flags; 370 #ifdef CONFIG_ATA_ACPI 371 acpi_handle acpi_handle; 372 #endif 373 struct ata_port *simplex_claimed; /* channel owning the DMA */ 374 struct ata_port *ports[0]; 375 }; 376 377 struct ata_queued_cmd { 378 struct ata_port *ap; 379 struct ata_device *dev; 380 381 struct scsi_cmnd *scsicmd; 382 void (*scsidone)(struct scsi_cmnd *); 383 384 struct ata_taskfile tf; 385 u8 cdb[ATAPI_CDB_LEN]; 386 387 unsigned long flags; /* ATA_QCFLAG_xxx */ 388 unsigned int tag; 389 unsigned int n_elem; 390 unsigned int orig_n_elem; 391 392 int dma_dir; 393 394 unsigned int pad_len; 395 unsigned int sect_size; 396 397 unsigned int nbytes; 398 unsigned int curbytes; 399 400 unsigned int cursg; 401 unsigned int cursg_ofs; 402 403 struct scatterlist sgent; 404 struct scatterlist pad_sgent; 405 void *buf_virt; 406 407 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 408 struct scatterlist *__sg; 409 410 unsigned int err_mask; 411 struct ata_taskfile result_tf; 412 ata_qc_cb_t complete_fn; 413 414 void *private_data; 415 }; 416 417 struct ata_port_stats { 418 unsigned long unhandled_irq; 419 unsigned long idle_irq; 420 unsigned long rw_reqbuf; 421 }; 422 423 struct ata_ering_entry { 424 int is_io; 425 unsigned int err_mask; 426 u64 timestamp; 427 }; 428 429 struct ata_ering { 430 int cursor; 431 struct ata_ering_entry ring[ATA_ERING_SIZE]; 432 }; 433 434 struct ata_device { 435 struct ata_port *ap; 436 unsigned int devno; /* 0 or 1 */ 437 unsigned long flags; /* ATA_DFLAG_xxx */ 438 struct scsi_device *sdev; /* attached SCSI device */ 439 #ifdef CONFIG_ATA_ACPI 440 acpi_handle acpi_handle; 441 #endif 442 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 443 u64 n_sectors; /* size of device, if ATA */ 444 unsigned int class; /* ATA_DEV_xxx */ 445 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 446 u8 pio_mode; 447 u8 dma_mode; 448 u8 xfer_mode; 449 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 450 451 unsigned int multi_count; /* sectors count for 452 READ/WRITE MULTIPLE */ 453 unsigned int max_sectors; /* per-device max sectors */ 454 unsigned int cdb_len; 455 456 /* per-dev xfer mask */ 457 unsigned int pio_mask; 458 unsigned int mwdma_mask; 459 unsigned int udma_mask; 460 461 /* for CHS addressing */ 462 u16 cylinders; /* Number of cylinders */ 463 u16 heads; /* Number of heads */ 464 u16 sectors; /* Number of sectors per track */ 465 466 /* error history */ 467 struct ata_ering ering; 468 int spdn_cnt; 469 unsigned int horkage; /* List of broken features */ 470 }; 471 472 /* Offset into struct ata_device. Fields above it are maintained 473 * acress device init. Fields below are zeroed. 474 */ 475 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 476 477 struct ata_eh_info { 478 struct ata_device *dev; /* offending device */ 479 u32 serror; /* SError from LLDD */ 480 unsigned int err_mask; /* port-wide err_mask */ 481 unsigned int action; /* ATA_EH_* action mask */ 482 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 483 unsigned int flags; /* ATA_EHI_* flags */ 484 485 unsigned int probe_mask; 486 487 char desc[ATA_EH_DESC_LEN]; 488 int desc_len; 489 }; 490 491 struct ata_eh_context { 492 struct ata_eh_info i; 493 int tries[ATA_MAX_DEVICES]; 494 unsigned int classes[ATA_MAX_DEVICES]; 495 unsigned int did_probe_mask; 496 }; 497 498 struct ata_acpi_drive 499 { 500 u32 pio; 501 u32 dma; 502 } __packed; 503 504 struct ata_acpi_gtm { 505 struct ata_acpi_drive drive[2]; 506 u32 flags; 507 } __packed; 508 509 struct ata_port { 510 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 511 const struct ata_port_operations *ops; 512 spinlock_t *lock; 513 unsigned long flags; /* ATA_FLAG_xxx */ 514 unsigned int pflags; /* ATA_PFLAG_xxx */ 515 unsigned int print_id; /* user visible unique port ID */ 516 unsigned int port_no; /* 0 based port no. inside the host */ 517 518 struct ata_prd *prd; /* our SG list */ 519 dma_addr_t prd_dma; /* and its DMA mapping */ 520 521 void *pad; /* array of DMA pad buffers */ 522 dma_addr_t pad_dma; 523 524 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 525 526 u8 ctl; /* cache of ATA control register */ 527 u8 last_ctl; /* Cache last written value */ 528 unsigned int pio_mask; 529 unsigned int mwdma_mask; 530 unsigned int udma_mask; 531 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 532 unsigned int hw_sata_spd_limit; 533 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 534 535 /* record runtime error info, protected by host lock */ 536 struct ata_eh_info eh_info; 537 /* EH context owned by EH */ 538 struct ata_eh_context eh_context; 539 540 struct ata_device device[ATA_MAX_DEVICES]; 541 542 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 543 unsigned long qc_allocated; 544 unsigned int qc_active; 545 546 unsigned int active_tag; 547 u32 sactive; 548 549 struct ata_port_stats stats; 550 struct ata_host *host; 551 struct device *dev; 552 553 void *port_task_data; 554 struct delayed_work port_task; 555 struct delayed_work hotplug_task; 556 struct work_struct scsi_rescan_task; 557 558 unsigned int hsm_task_state; 559 560 u32 msg_enable; 561 struct list_head eh_done_q; 562 wait_queue_head_t eh_wait_q; 563 564 pm_message_t pm_mesg; 565 int *pm_result; 566 567 void *private_data; 568 569 #ifdef CONFIG_ATA_ACPI 570 acpi_handle acpi_handle; 571 struct ata_acpi_gtm acpi_gtm; 572 #endif 573 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 574 }; 575 576 struct ata_port_operations { 577 void (*port_disable) (struct ata_port *); 578 579 void (*dev_config) (struct ata_device *); 580 581 void (*set_piomode) (struct ata_port *, struct ata_device *); 582 void (*set_dmamode) (struct ata_port *, struct ata_device *); 583 unsigned long (*mode_filter) (struct ata_device *, unsigned long); 584 585 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 586 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 587 588 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 589 u8 (*check_status)(struct ata_port *ap); 590 u8 (*check_altstatus)(struct ata_port *ap); 591 void (*dev_select)(struct ata_port *ap, unsigned int device); 592 593 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 594 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev); 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 unsigned long deadline); 693 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param, 694 unsigned long deadline); 695 extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline); 696 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes, 697 unsigned long deadline); 698 extern int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing, 699 unsigned long deadline); 700 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class, 701 unsigned long deadline); 702 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 703 extern void ata_port_disable(struct ata_port *); 704 extern void ata_std_ports(struct ata_ioports *ioaddr); 705 #ifdef CONFIG_PCI 706 extern int ata_pci_init_one (struct pci_dev *pdev, 707 const struct ata_port_info * const * ppi); 708 extern void ata_pci_remove_one (struct pci_dev *pdev); 709 #ifdef CONFIG_PM 710 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 711 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 712 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 713 extern int ata_pci_device_resume(struct pci_dev *pdev); 714 #endif 715 extern int ata_pci_clear_simplex(struct pci_dev *pdev); 716 #endif /* CONFIG_PCI */ 717 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); 718 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, 719 const struct ata_port_info * const * ppi, int n_ports); 720 extern int ata_host_start(struct ata_host *host); 721 extern int ata_host_register(struct ata_host *host, 722 struct scsi_host_template *sht); 723 extern int ata_host_activate(struct ata_host *host, int irq, 724 irq_handler_t irq_handler, unsigned long irq_flags, 725 struct scsi_host_template *sht); 726 extern void ata_host_detach(struct ata_host *host); 727 extern void ata_host_init(struct ata_host *, struct device *, 728 unsigned long, const struct ata_port_operations *); 729 extern int ata_scsi_detect(struct scsi_host_template *sht); 730 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 731 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 732 extern void ata_sas_port_destroy(struct ata_port *); 733 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 734 struct ata_port_info *, struct Scsi_Host *); 735 extern int ata_sas_port_init(struct ata_port *); 736 extern int ata_sas_port_start(struct ata_port *ap); 737 extern void ata_sas_port_stop(struct ata_port *ap); 738 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 739 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 740 struct ata_port *ap); 741 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 742 extern int sata_scr_valid(struct ata_port *ap); 743 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 744 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 745 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 746 extern int ata_port_online(struct ata_port *ap); 747 extern int ata_port_offline(struct ata_port *ap); 748 #ifdef CONFIG_PM 749 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 750 extern void ata_host_resume(struct ata_host *host); 751 #endif 752 extern int ata_ratelimit(void); 753 extern int ata_busy_sleep(struct ata_port *ap, 754 unsigned long timeout_pat, unsigned long timeout); 755 extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline); 756 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 757 void *data, unsigned long delay); 758 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 759 unsigned long interval_msec, 760 unsigned long timeout_msec); 761 extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *); 762 763 /* 764 * Default driver ops implementations 765 */ 766 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 767 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 768 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 769 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 770 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 771 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 772 extern u8 ata_check_status(struct ata_port *ap); 773 extern u8 ata_altstatus(struct ata_port *ap); 774 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 775 extern int ata_port_start (struct ata_port *ap); 776 extern int ata_sff_port_start (struct ata_port *ap); 777 extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 778 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 779 unsigned int buflen, int write_data); 780 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 781 unsigned int buflen, int write_data); 782 extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc); 783 extern void ata_qc_prep(struct ata_queued_cmd *qc); 784 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 785 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 786 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 787 unsigned int buflen); 788 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 789 unsigned int n_elem); 790 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 791 extern void ata_dev_disable(struct ata_device *adev); 792 extern void ata_id_string(const u16 *id, unsigned char *s, 793 unsigned int ofs, unsigned int len); 794 extern void ata_id_c_string(const u16 *id, unsigned char *s, 795 unsigned int ofs, unsigned int len); 796 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); 797 extern unsigned long ata_device_blacklisted(const struct ata_device *dev); 798 extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 799 extern void ata_bmdma_start (struct ata_queued_cmd *qc); 800 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 801 extern u8 ata_bmdma_status(struct ata_port *ap); 802 extern void ata_bmdma_irq_clear(struct ata_port *ap); 803 extern void ata_bmdma_freeze(struct ata_port *ap); 804 extern void ata_bmdma_thaw(struct ata_port *ap); 805 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 806 ata_reset_fn_t softreset, 807 ata_reset_fn_t hardreset, 808 ata_postreset_fn_t postreset); 809 extern void ata_bmdma_error_handler(struct ata_port *ap); 810 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 811 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 812 u8 status, int in_wq); 813 extern void ata_qc_complete(struct ata_queued_cmd *qc); 814 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 815 void (*finish_qc)(struct ata_queued_cmd *)); 816 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 817 void (*done)(struct scsi_cmnd *)); 818 extern int ata_std_bios_param(struct scsi_device *sdev, 819 struct block_device *bdev, 820 sector_t capacity, int geom[]); 821 extern int ata_scsi_slave_config(struct scsi_device *sdev); 822 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 823 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 824 int queue_depth); 825 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 826 extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev); 827 extern u8 ata_irq_on(struct ata_port *ap); 828 extern u8 ata_dummy_irq_on(struct ata_port *ap); 829 extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); 830 extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); 831 832 extern int ata_cable_40wire(struct ata_port *ap); 833 extern int ata_cable_80wire(struct ata_port *ap); 834 extern int ata_cable_sata(struct ata_port *ap); 835 extern int ata_cable_unknown(struct ata_port *ap); 836 837 /* 838 * Timing helpers 839 */ 840 841 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 842 extern int ata_timing_compute(struct ata_device *, unsigned short, 843 struct ata_timing *, int, int); 844 extern void ata_timing_merge(const struct ata_timing *, 845 const struct ata_timing *, struct ata_timing *, 846 unsigned int); 847 848 enum { 849 ATA_TIMING_SETUP = (1 << 0), 850 ATA_TIMING_ACT8B = (1 << 1), 851 ATA_TIMING_REC8B = (1 << 2), 852 ATA_TIMING_CYC8B = (1 << 3), 853 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 854 ATA_TIMING_CYC8B, 855 ATA_TIMING_ACTIVE = (1 << 4), 856 ATA_TIMING_RECOVER = (1 << 5), 857 ATA_TIMING_CYCLE = (1 << 6), 858 ATA_TIMING_UDMA = (1 << 7), 859 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 860 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 861 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 862 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 863 }; 864 865 866 #ifdef CONFIG_PCI 867 struct pci_bits { 868 unsigned int reg; /* PCI config register to read */ 869 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 870 unsigned long mask; 871 unsigned long val; 872 }; 873 874 extern int ata_pci_init_native_host(struct ata_host *host); 875 extern int ata_pci_init_bmdma(struct ata_host *host); 876 extern int ata_pci_prepare_native_host(struct pci_dev *pdev, 877 const struct ata_port_info * const * ppi, 878 struct ata_host **r_host); 879 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 880 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); 881 #endif /* CONFIG_PCI */ 882 883 /* 884 * EH 885 */ 886 extern void ata_eng_timeout(struct ata_port *ap); 887 888 extern void ata_port_schedule_eh(struct ata_port *ap); 889 extern int ata_port_abort(struct ata_port *ap); 890 extern int ata_port_freeze(struct ata_port *ap); 891 892 extern void ata_eh_freeze_port(struct ata_port *ap); 893 extern void ata_eh_thaw_port(struct ata_port *ap); 894 895 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 896 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 897 898 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 899 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 900 ata_postreset_fn_t postreset); 901 902 /* 903 * printk helpers 904 */ 905 #define ata_port_printk(ap, lv, fmt, args...) \ 906 printk(lv"ata%u: "fmt, (ap)->print_id , ##args) 907 908 #define ata_dev_printk(dev, lv, fmt, args...) \ 909 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args) 910 911 /* 912 * ata_eh_info helpers 913 */ 914 #define ata_ehi_push_desc(ehi, fmt, args...) do { \ 915 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 916 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 917 fmt , ##args); \ 918 } while (0) 919 920 #define ata_ehi_clear_desc(ehi) do { \ 921 (ehi)->desc[0] = '\0'; \ 922 (ehi)->desc_len = 0; \ 923 } while (0) 924 925 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi) 926 { 927 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK; 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 /* 1022 * port helpers 1023 */ 1024 static inline int ata_port_max_devices(const struct ata_port *ap) 1025 { 1026 if (ap->flags & ATA_FLAG_SLAVE_POSS) 1027 return 2; 1028 return 1; 1029 } 1030 1031 1032 static inline u8 ata_chk_status(struct ata_port *ap) 1033 { 1034 return ap->ops->check_status(ap); 1035 } 1036 1037 /** 1038 * ata_ncq_enabled - Test whether NCQ is enabled 1039 * @dev: ATA device to test for 1040 * 1041 * LOCKING: 1042 * spin_lock_irqsave(host lock) 1043 * 1044 * RETURNS: 1045 * 1 if NCQ is enabled for @dev, 0 otherwise. 1046 */ 1047 static inline int ata_ncq_enabled(struct ata_device *dev) 1048 { 1049 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1050 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1051 } 1052 1053 /** 1054 * ata_pause - Flush writes and pause 400 nanoseconds. 1055 * @ap: Port to wait for. 1056 * 1057 * LOCKING: 1058 * Inherited from caller. 1059 */ 1060 1061 static inline void ata_pause(struct ata_port *ap) 1062 { 1063 ata_altstatus(ap); 1064 ndelay(400); 1065 } 1066 1067 1068 /** 1069 * ata_busy_wait - Wait for a port status register 1070 * @ap: Port to wait for. 1071 * @bits: bits that must be clear 1072 * @max: number of 10uS waits to perform 1073 * 1074 * Waits up to max*10 microseconds for the selected bits in the port's 1075 * status register to be cleared. 1076 * Returns final value of status register. 1077 * 1078 * LOCKING: 1079 * Inherited from caller. 1080 */ 1081 1082 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1083 unsigned int max) 1084 { 1085 u8 status; 1086 1087 do { 1088 udelay(10); 1089 status = ata_chk_status(ap); 1090 max--; 1091 } while (status != 0xff && (status & bits) && (max > 0)); 1092 1093 return status; 1094 } 1095 1096 1097 /** 1098 * ata_wait_idle - Wait for a port to be idle. 1099 * @ap: Port to wait for. 1100 * 1101 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1102 * Returns final value of status register. 1103 * 1104 * LOCKING: 1105 * Inherited from caller. 1106 */ 1107 1108 static inline u8 ata_wait_idle(struct ata_port *ap) 1109 { 1110 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1111 1112 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) 1113 DPRINTK("ATA: abnormal status 0x%X on port 0x%p\n", 1114 status, ap->ioaddr.status_addr); 1115 1116 return status; 1117 } 1118 1119 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1120 { 1121 qc->tf.ctl |= ATA_NIEN; 1122 } 1123 1124 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1125 unsigned int tag) 1126 { 1127 if (likely(ata_tag_valid(tag))) 1128 return &ap->qcmd[tag]; 1129 return NULL; 1130 } 1131 1132 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1133 unsigned int tag) 1134 { 1135 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1136 1137 if (unlikely(!qc) || !ap->ops->error_handler) 1138 return qc; 1139 1140 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1141 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1142 return qc; 1143 1144 return NULL; 1145 } 1146 1147 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1148 { 1149 memset(tf, 0, sizeof(*tf)); 1150 1151 tf->ctl = dev->ap->ctl; 1152 if (dev->devno == 0) 1153 tf->device = ATA_DEVICE_OBS; 1154 else 1155 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1156 } 1157 1158 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1159 { 1160 qc->dma_dir = DMA_NONE; 1161 qc->__sg = NULL; 1162 qc->flags = 0; 1163 qc->cursg = qc->cursg_ofs = 0; 1164 qc->nbytes = qc->curbytes = 0; 1165 qc->n_elem = 0; 1166 qc->err_mask = 0; 1167 qc->pad_len = 0; 1168 qc->sect_size = ATA_SECT_SIZE; 1169 1170 ata_tf_init(qc->dev, &qc->tf); 1171 1172 /* init result_tf such that it indicates normal completion */ 1173 qc->result_tf.command = ATA_DRDY; 1174 qc->result_tf.feature = 0; 1175 } 1176 1177 static inline int ata_try_flush_cache(const struct ata_device *dev) 1178 { 1179 return ata_id_wcache_enabled(dev->id) || 1180 ata_id_has_flush(dev->id) || 1181 ata_id_has_flush_ext(dev->id); 1182 } 1183 1184 static inline unsigned int ac_err_mask(u8 status) 1185 { 1186 if (status & (ATA_BUSY | ATA_DRQ)) 1187 return AC_ERR_HSM; 1188 if (status & (ATA_ERR | ATA_DF)) 1189 return AC_ERR_DEV; 1190 return 0; 1191 } 1192 1193 static inline unsigned int __ac_err_mask(u8 status) 1194 { 1195 unsigned int mask = ac_err_mask(status); 1196 if (mask == 0) 1197 return AC_ERR_OTHER; 1198 return mask; 1199 } 1200 1201 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1202 { 1203 ap->pad_dma = 0; 1204 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1205 &ap->pad_dma, GFP_KERNEL); 1206 return (ap->pad == NULL) ? -ENOMEM : 0; 1207 } 1208 1209 static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1210 { 1211 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1212 } 1213 1214 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1215 { 1216 return *(struct ata_port **)&host->hostdata[0]; 1217 } 1218 1219 #endif /* __LINUX_LIBATA_H__ */ 1220