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 */ 213 214 /* 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 }; 315 316 enum hsm_task_states { 317 HSM_ST_IDLE, /* no command on going */ 318 HSM_ST, /* (waiting the device to) transfer data */ 319 HSM_ST_LAST, /* (waiting the device to) complete command */ 320 HSM_ST_ERR, /* error */ 321 HSM_ST_FIRST, /* (waiting the device to) 322 write CDB or first data block */ 323 }; 324 325 enum ata_completion_errors { 326 AC_ERR_DEV = (1 << 0), /* device reported error */ 327 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 328 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 329 AC_ERR_MEDIA = (1 << 3), /* media error */ 330 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 331 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 332 AC_ERR_SYSTEM = (1 << 6), /* system error */ 333 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 334 AC_ERR_OTHER = (1 << 8), /* unknown */ 335 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 336 }; 337 338 /* forward declarations */ 339 struct scsi_device; 340 struct ata_port_operations; 341 struct ata_port; 342 struct ata_queued_cmd; 343 344 /* typedefs */ 345 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 346 typedef int (*ata_prereset_fn_t)(struct ata_port *ap); 347 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes); 348 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 349 350 struct ata_ioports { 351 void __iomem *cmd_addr; 352 void __iomem *data_addr; 353 void __iomem *error_addr; 354 void __iomem *feature_addr; 355 void __iomem *nsect_addr; 356 void __iomem *lbal_addr; 357 void __iomem *lbam_addr; 358 void __iomem *lbah_addr; 359 void __iomem *device_addr; 360 void __iomem *status_addr; 361 void __iomem *command_addr; 362 void __iomem *altstatus_addr; 363 void __iomem *ctl_addr; 364 void __iomem *bmdma_addr; 365 void __iomem *scr_addr; 366 }; 367 368 struct ata_probe_ent { 369 struct list_head node; 370 struct device *dev; 371 const struct ata_port_operations *port_ops; 372 struct scsi_host_template *sht; 373 struct ata_ioports port[ATA_MAX_PORTS]; 374 unsigned int n_ports; 375 unsigned int dummy_port_mask; 376 unsigned int pio_mask; 377 unsigned int mwdma_mask; 378 unsigned int udma_mask; 379 unsigned long irq; 380 unsigned long irq2; 381 unsigned int irq_flags; 382 unsigned long port_flags; 383 unsigned long _host_flags; 384 void __iomem * const *iomap; 385 void *private_data; 386 387 /* port_info for the secondary port. Together with irq2, it's 388 * used to implement non-uniform secondary port. Currently, 389 * the only user is ata_piix combined mode. This workaround 390 * will be removed together with ata_probe_ent when init model 391 * is updated. 392 */ 393 const struct ata_port_info *pinfo2; 394 }; 395 396 struct ata_host { 397 spinlock_t lock; 398 struct device *dev; 399 unsigned long irq; 400 unsigned long irq2; 401 void __iomem * const *iomap; 402 unsigned int n_ports; 403 void *private_data; 404 const struct ata_port_operations *ops; 405 unsigned long flags; 406 struct ata_port *simplex_claimed; /* channel owning the DMA */ 407 struct ata_port *ports[0]; 408 }; 409 410 struct ata_queued_cmd { 411 struct ata_port *ap; 412 struct ata_device *dev; 413 414 struct scsi_cmnd *scsicmd; 415 void (*scsidone)(struct scsi_cmnd *); 416 417 struct ata_taskfile tf; 418 u8 cdb[ATAPI_CDB_LEN]; 419 420 unsigned long flags; /* ATA_QCFLAG_xxx */ 421 unsigned int tag; 422 unsigned int n_elem; 423 unsigned int orig_n_elem; 424 425 int dma_dir; 426 427 unsigned int pad_len; 428 429 unsigned int nbytes; 430 unsigned int curbytes; 431 432 unsigned int cursg; 433 unsigned int cursg_ofs; 434 435 struct scatterlist sgent; 436 struct scatterlist pad_sgent; 437 void *buf_virt; 438 439 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 440 struct scatterlist *__sg; 441 442 unsigned int err_mask; 443 struct ata_taskfile result_tf; 444 ata_qc_cb_t complete_fn; 445 446 void *private_data; 447 }; 448 449 struct ata_port_stats { 450 unsigned long unhandled_irq; 451 unsigned long idle_irq; 452 unsigned long rw_reqbuf; 453 }; 454 455 struct ata_ering_entry { 456 int is_io; 457 unsigned int err_mask; 458 u64 timestamp; 459 }; 460 461 struct ata_ering { 462 int cursor; 463 struct ata_ering_entry ring[ATA_ERING_SIZE]; 464 }; 465 466 struct ata_device { 467 struct ata_port *ap; 468 unsigned int devno; /* 0 or 1 */ 469 unsigned long flags; /* ATA_DFLAG_xxx */ 470 struct scsi_device *sdev; /* attached SCSI device */ 471 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 472 u64 n_sectors; /* size of device, if ATA */ 473 unsigned int class; /* ATA_DEV_xxx */ 474 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 475 u8 pio_mode; 476 u8 dma_mode; 477 u8 xfer_mode; 478 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 479 480 unsigned int multi_count; /* sectors count for 481 READ/WRITE MULTIPLE */ 482 unsigned int max_sectors; /* per-device max sectors */ 483 unsigned int cdb_len; 484 485 /* per-dev xfer mask */ 486 unsigned int pio_mask; 487 unsigned int mwdma_mask; 488 unsigned int udma_mask; 489 490 /* for CHS addressing */ 491 u16 cylinders; /* Number of cylinders */ 492 u16 heads; /* Number of heads */ 493 u16 sectors; /* Number of sectors per track */ 494 495 /* error history */ 496 struct ata_ering ering; 497 int spdn_cnt; 498 unsigned int horkage; /* List of broken features */ 499 #ifdef CONFIG_SATA_ACPI 500 /* ACPI objects info */ 501 acpi_handle obj_handle; 502 #endif 503 }; 504 505 /* Offset into struct ata_device. Fields above it are maintained 506 * acress device init. Fields below are zeroed. 507 */ 508 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 509 510 struct ata_eh_info { 511 struct ata_device *dev; /* offending device */ 512 u32 serror; /* SError from LLDD */ 513 unsigned int err_mask; /* port-wide err_mask */ 514 unsigned int action; /* ATA_EH_* action mask */ 515 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 516 unsigned int flags; /* ATA_EHI_* flags */ 517 518 unsigned long hotplug_timestamp; 519 unsigned int probe_mask; 520 521 char desc[ATA_EH_DESC_LEN]; 522 int desc_len; 523 }; 524 525 struct ata_eh_context { 526 struct ata_eh_info i; 527 int tries[ATA_MAX_DEVICES]; 528 unsigned int classes[ATA_MAX_DEVICES]; 529 unsigned int did_probe_mask; 530 }; 531 532 struct ata_port { 533 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 534 const struct ata_port_operations *ops; 535 spinlock_t *lock; 536 unsigned long flags; /* ATA_FLAG_xxx */ 537 unsigned int pflags; /* ATA_PFLAG_xxx */ 538 unsigned int print_id; /* user visible unique port ID */ 539 unsigned int port_no; /* 0 based port no. inside the host */ 540 541 struct ata_prd *prd; /* our SG list */ 542 dma_addr_t prd_dma; /* and its DMA mapping */ 543 544 void *pad; /* array of DMA pad buffers */ 545 dma_addr_t pad_dma; 546 547 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 548 549 u8 ctl; /* cache of ATA control register */ 550 u8 last_ctl; /* Cache last written value */ 551 unsigned int pio_mask; 552 unsigned int mwdma_mask; 553 unsigned int udma_mask; 554 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 555 unsigned int hw_sata_spd_limit; 556 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 557 558 /* record runtime error info, protected by host lock */ 559 struct ata_eh_info eh_info; 560 /* EH context owned by EH */ 561 struct ata_eh_context eh_context; 562 563 struct ata_device device[ATA_MAX_DEVICES]; 564 565 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 566 unsigned long qc_allocated; 567 unsigned int qc_active; 568 569 unsigned int active_tag; 570 u32 sactive; 571 572 struct ata_port_stats stats; 573 struct ata_host *host; 574 struct device *dev; 575 576 void *port_task_data; 577 struct delayed_work port_task; 578 struct delayed_work hotplug_task; 579 struct work_struct scsi_rescan_task; 580 581 unsigned int hsm_task_state; 582 583 u32 msg_enable; 584 struct list_head eh_done_q; 585 wait_queue_head_t eh_wait_q; 586 587 pm_message_t pm_mesg; 588 int *pm_result; 589 590 void *private_data; 591 592 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 593 }; 594 595 struct ata_port_operations { 596 void (*port_disable) (struct ata_port *); 597 598 void (*dev_config) (struct ata_port *, struct ata_device *); 599 600 void (*set_piomode) (struct ata_port *, struct ata_device *); 601 void (*set_dmamode) (struct ata_port *, struct ata_device *); 602 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long); 603 604 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 605 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 606 607 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 608 u8 (*check_status)(struct ata_port *ap); 609 u8 (*check_altstatus)(struct ata_port *ap); 610 void (*dev_select)(struct ata_port *ap, unsigned int device); 611 612 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 613 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev); 614 615 void (*post_set_mode) (struct ata_port *ap); 616 617 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 618 619 void (*bmdma_setup) (struct ata_queued_cmd *qc); 620 void (*bmdma_start) (struct ata_queued_cmd *qc); 621 622 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 623 624 void (*qc_prep) (struct ata_queued_cmd *qc); 625 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 626 627 /* Error handlers. ->error_handler overrides ->eng_timeout and 628 * indicates that new-style EH is in place. 629 */ 630 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 631 632 void (*freeze) (struct ata_port *ap); 633 void (*thaw) (struct ata_port *ap); 634 void (*error_handler) (struct ata_port *ap); 635 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 636 637 irq_handler_t irq_handler; 638 void (*irq_clear) (struct ata_port *); 639 u8 (*irq_on) (struct ata_port *); 640 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq); 641 642 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 643 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 644 u32 val); 645 646 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 647 int (*port_resume) (struct ata_port *ap); 648 649 int (*port_start) (struct ata_port *ap); 650 void (*port_stop) (struct ata_port *ap); 651 652 void (*host_stop) (struct ata_host *host); 653 654 void (*bmdma_stop) (struct ata_queued_cmd *qc); 655 u8 (*bmdma_status) (struct ata_port *ap); 656 }; 657 658 struct ata_port_info { 659 struct scsi_host_template *sht; 660 unsigned long flags; 661 unsigned long pio_mask; 662 unsigned long mwdma_mask; 663 unsigned long udma_mask; 664 const struct ata_port_operations *port_ops; 665 void *private_data; 666 }; 667 668 struct ata_timing { 669 unsigned short mode; /* ATA mode */ 670 unsigned short setup; /* t1 */ 671 unsigned short act8b; /* t2 for 8-bit I/O */ 672 unsigned short rec8b; /* t2i for 8-bit I/O */ 673 unsigned short cyc8b; /* t0 for 8-bit I/O */ 674 unsigned short active; /* t2 or tD */ 675 unsigned short recover; /* t2i or tK */ 676 unsigned short cycle; /* t0 */ 677 unsigned short udma; /* t2CYCTYP/2 */ 678 }; 679 680 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 681 682 extern const unsigned long sata_deb_timing_normal[]; 683 extern const unsigned long sata_deb_timing_hotplug[]; 684 extern const unsigned long sata_deb_timing_long[]; 685 686 extern const struct ata_port_operations ata_dummy_port_ops; 687 688 static inline const unsigned long * 689 sata_ehc_deb_timing(struct ata_eh_context *ehc) 690 { 691 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 692 return sata_deb_timing_hotplug; 693 else 694 return sata_deb_timing_normal; 695 } 696 697 static inline int ata_port_is_dummy(struct ata_port *ap) 698 { 699 return ap->ops == &ata_dummy_port_ops; 700 } 701 702 extern void ata_port_probe(struct ata_port *); 703 extern void __sata_phy_reset(struct ata_port *ap); 704 extern void sata_phy_reset(struct ata_port *ap); 705 extern void ata_bus_reset(struct ata_port *ap); 706 extern int sata_set_spd(struct ata_port *ap); 707 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param); 708 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param); 709 extern int ata_std_prereset(struct ata_port *ap); 710 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); 711 extern int sata_port_hardreset(struct ata_port *ap, 712 const unsigned long *timing); 713 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); 714 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 715 extern void ata_port_disable(struct ata_port *); 716 extern void ata_std_ports(struct ata_ioports *ioaddr); 717 #ifdef CONFIG_PCI 718 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 719 unsigned int n_ports); 720 extern void ata_pci_remove_one (struct pci_dev *pdev); 721 #ifdef CONFIG_PM 722 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 723 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 724 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 725 extern int ata_pci_device_resume(struct pci_dev *pdev); 726 #endif 727 extern int ata_pci_clear_simplex(struct pci_dev *pdev); 728 #endif /* CONFIG_PCI */ 729 extern int ata_device_add(const struct ata_probe_ent *ent); 730 extern void ata_host_detach(struct ata_host *host); 731 extern void ata_host_init(struct ata_host *, struct device *, 732 unsigned long, const struct ata_port_operations *); 733 extern int ata_scsi_detect(struct scsi_host_template *sht); 734 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 735 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 736 extern void ata_sas_port_destroy(struct ata_port *); 737 extern struct ata_port *ata_sas_port_alloc(struct ata_host *, 738 struct ata_port_info *, struct Scsi_Host *); 739 extern int ata_sas_port_init(struct ata_port *); 740 extern int ata_sas_port_start(struct ata_port *ap); 741 extern void ata_sas_port_stop(struct ata_port *ap); 742 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); 743 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), 744 struct ata_port *ap); 745 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 746 extern int sata_scr_valid(struct ata_port *ap); 747 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 748 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 749 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 750 extern int ata_port_online(struct ata_port *ap); 751 extern int ata_port_offline(struct ata_port *ap); 752 #ifdef CONFIG_PM 753 extern int ata_scsi_device_resume(struct scsi_device *); 754 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg); 755 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 756 extern void ata_host_resume(struct ata_host *host); 757 #endif 758 extern int ata_ratelimit(void); 759 extern int ata_busy_sleep(struct ata_port *ap, 760 unsigned long timeout_pat, unsigned long timeout); 761 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 762 void *data, unsigned long delay); 763 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 764 unsigned long interval_msec, 765 unsigned long timeout_msec); 766 extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *); 767 768 /* 769 * Default driver ops implementations 770 */ 771 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 772 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 773 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 774 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 775 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 776 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 777 extern u8 ata_check_status(struct ata_port *ap); 778 extern u8 ata_altstatus(struct ata_port *ap); 779 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 780 extern int ata_port_start (struct ata_port *ap); 781 extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 782 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 783 unsigned int buflen, int write_data); 784 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 785 unsigned int buflen, int write_data); 786 extern void ata_qc_prep(struct ata_queued_cmd *qc); 787 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 788 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 789 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 790 unsigned int buflen); 791 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 792 unsigned int n_elem); 793 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 794 extern void ata_dev_disable(struct ata_device *adev); 795 extern void ata_id_string(const u16 *id, unsigned char *s, 796 unsigned int ofs, unsigned int len); 797 extern void ata_id_c_string(const u16 *id, unsigned char *s, 798 unsigned int ofs, unsigned int len); 799 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); 800 extern unsigned long ata_device_blacklisted(const struct ata_device *dev); 801 extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 802 extern void ata_bmdma_start (struct ata_queued_cmd *qc); 803 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 804 extern u8 ata_bmdma_status(struct ata_port *ap); 805 extern void ata_bmdma_irq_clear(struct ata_port *ap); 806 extern void ata_bmdma_freeze(struct ata_port *ap); 807 extern void ata_bmdma_thaw(struct ata_port *ap); 808 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 809 ata_reset_fn_t softreset, 810 ata_reset_fn_t hardreset, 811 ata_postreset_fn_t postreset); 812 extern void ata_bmdma_error_handler(struct ata_port *ap); 813 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 814 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 815 u8 status, int in_wq); 816 extern void ata_qc_complete(struct ata_queued_cmd *qc); 817 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 818 void (*finish_qc)(struct ata_queued_cmd *)); 819 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 820 void (*done)(struct scsi_cmnd *)); 821 extern int ata_std_bios_param(struct scsi_device *sdev, 822 struct block_device *bdev, 823 sector_t capacity, int geom[]); 824 extern int ata_scsi_slave_config(struct scsi_device *sdev); 825 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 826 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 827 int queue_depth); 828 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 829 extern u8 ata_irq_on(struct ata_port *ap); 830 extern u8 ata_dummy_irq_on(struct ata_port *ap); 831 extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); 832 extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); 833 834 /* 835 * Timing helpers 836 */ 837 838 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 839 extern int ata_timing_compute(struct ata_device *, unsigned short, 840 struct ata_timing *, int, int); 841 extern void ata_timing_merge(const struct ata_timing *, 842 const struct ata_timing *, struct ata_timing *, 843 unsigned int); 844 845 enum { 846 ATA_TIMING_SETUP = (1 << 0), 847 ATA_TIMING_ACT8B = (1 << 1), 848 ATA_TIMING_REC8B = (1 << 2), 849 ATA_TIMING_CYC8B = (1 << 3), 850 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 851 ATA_TIMING_CYC8B, 852 ATA_TIMING_ACTIVE = (1 << 4), 853 ATA_TIMING_RECOVER = (1 << 5), 854 ATA_TIMING_CYCLE = (1 << 6), 855 ATA_TIMING_UDMA = (1 << 7), 856 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 857 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 858 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 859 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 860 }; 861 862 863 #ifdef CONFIG_PCI 864 struct pci_bits { 865 unsigned int reg; /* PCI config register to read */ 866 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 867 unsigned long mask; 868 unsigned long val; 869 }; 870 871 extern struct ata_probe_ent * 872 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); 873 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 874 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long); 875 #endif /* CONFIG_PCI */ 876 877 /* 878 * EH 879 */ 880 extern void ata_eng_timeout(struct ata_port *ap); 881 882 extern void ata_port_schedule_eh(struct ata_port *ap); 883 extern int ata_port_abort(struct ata_port *ap); 884 extern int ata_port_freeze(struct ata_port *ap); 885 886 extern void ata_eh_freeze_port(struct ata_port *ap); 887 extern void ata_eh_thaw_port(struct ata_port *ap); 888 889 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 890 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 891 892 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 893 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 894 ata_postreset_fn_t postreset); 895 896 /* 897 * printk helpers 898 */ 899 #define ata_port_printk(ap, lv, fmt, args...) \ 900 printk(lv"ata%u: "fmt, (ap)->print_id , ##args) 901 902 #define ata_dev_printk(dev, lv, fmt, args...) \ 903 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args) 904 905 /* 906 * ata_eh_info helpers 907 */ 908 #define ata_ehi_push_desc(ehi, fmt, args...) do { \ 909 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 910 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 911 fmt , ##args); \ 912 } while (0) 913 914 #define ata_ehi_clear_desc(ehi) do { \ 915 (ehi)->desc[0] = '\0'; \ 916 (ehi)->desc_len = 0; \ 917 } while (0) 918 919 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi) 920 { 921 if (ehi->flags & ATA_EHI_HOTPLUGGED) 922 return; 923 924 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK; 925 ehi->hotplug_timestamp = jiffies; 926 927 ehi->action |= ATA_EH_SOFTRESET; 928 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 929 } 930 931 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 932 { 933 __ata_ehi_hotplugged(ehi); 934 ehi->err_mask |= AC_ERR_ATA_BUS; 935 } 936 937 /* 938 * qc helpers 939 */ 940 static inline int 941 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 942 { 943 if (sg == &qc->pad_sgent) 944 return 1; 945 if (qc->pad_len) 946 return 0; 947 if (((sg - qc->__sg) + 1) == qc->n_elem) 948 return 1; 949 return 0; 950 } 951 952 static inline struct scatterlist * 953 ata_qc_first_sg(struct ata_queued_cmd *qc) 954 { 955 if (qc->n_elem) 956 return qc->__sg; 957 if (qc->pad_len) 958 return &qc->pad_sgent; 959 return NULL; 960 } 961 962 static inline struct scatterlist * 963 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 964 { 965 if (sg == &qc->pad_sgent) 966 return NULL; 967 if (++sg - qc->__sg < qc->n_elem) 968 return sg; 969 if (qc->pad_len) 970 return &qc->pad_sgent; 971 return NULL; 972 } 973 974 #define ata_for_each_sg(sg, qc) \ 975 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 976 977 static inline unsigned int ata_tag_valid(unsigned int tag) 978 { 979 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 980 } 981 982 static inline unsigned int ata_tag_internal(unsigned int tag) 983 { 984 return tag == ATA_MAX_QUEUE - 1; 985 } 986 987 /* 988 * device helpers 989 */ 990 static inline unsigned int ata_class_enabled(unsigned int class) 991 { 992 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 993 } 994 995 static inline unsigned int ata_class_disabled(unsigned int class) 996 { 997 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 998 } 999 1000 static inline unsigned int ata_class_absent(unsigned int class) 1001 { 1002 return !ata_class_enabled(class) && !ata_class_disabled(class); 1003 } 1004 1005 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 1006 { 1007 return ata_class_enabled(dev->class); 1008 } 1009 1010 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 1011 { 1012 return ata_class_disabled(dev->class); 1013 } 1014 1015 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1016 { 1017 return ata_class_absent(dev->class); 1018 } 1019 1020 static inline unsigned int ata_dev_ready(const struct ata_device *dev) 1021 { 1022 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED); 1023 } 1024 1025 /* 1026 * port helpers 1027 */ 1028 static inline int ata_port_max_devices(const struct ata_port *ap) 1029 { 1030 if (ap->flags & ATA_FLAG_SLAVE_POSS) 1031 return 2; 1032 return 1; 1033 } 1034 1035 1036 static inline u8 ata_chk_status(struct ata_port *ap) 1037 { 1038 return ap->ops->check_status(ap); 1039 } 1040 1041 /** 1042 * ata_ncq_enabled - Test whether NCQ is enabled 1043 * @dev: ATA device to test for 1044 * 1045 * LOCKING: 1046 * spin_lock_irqsave(host lock) 1047 * 1048 * RETURNS: 1049 * 1 if NCQ is enabled for @dev, 0 otherwise. 1050 */ 1051 static inline int ata_ncq_enabled(struct ata_device *dev) 1052 { 1053 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | 1054 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; 1055 } 1056 1057 /** 1058 * ata_pause - Flush writes and pause 400 nanoseconds. 1059 * @ap: Port to wait for. 1060 * 1061 * LOCKING: 1062 * Inherited from caller. 1063 */ 1064 1065 static inline void ata_pause(struct ata_port *ap) 1066 { 1067 ata_altstatus(ap); 1068 ndelay(400); 1069 } 1070 1071 1072 /** 1073 * ata_busy_wait - Wait for a port status register 1074 * @ap: Port to wait for. 1075 * @bits: bits that must be clear 1076 * @max: number of 10uS waits to perform 1077 * 1078 * Waits up to max*10 microseconds for the selected bits in the port's 1079 * status register to be cleared. 1080 * Returns final value of status register. 1081 * 1082 * LOCKING: 1083 * Inherited from caller. 1084 */ 1085 1086 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1087 unsigned int max) 1088 { 1089 u8 status; 1090 1091 do { 1092 udelay(10); 1093 status = ata_chk_status(ap); 1094 max--; 1095 } while (status != 0xff && (status & bits) && (max > 0)); 1096 1097 return status; 1098 } 1099 1100 1101 /** 1102 * ata_wait_idle - Wait for a port to be idle. 1103 * @ap: Port to wait for. 1104 * 1105 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1106 * Returns final value of status register. 1107 * 1108 * LOCKING: 1109 * Inherited from caller. 1110 */ 1111 1112 static inline u8 ata_wait_idle(struct ata_port *ap) 1113 { 1114 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1115 1116 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) { 1117 if (ata_msg_warn(ap)) 1118 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n", 1119 status, ap->ioaddr.status_addr); 1120 } 1121 1122 return status; 1123 } 1124 1125 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1126 { 1127 qc->tf.ctl |= ATA_NIEN; 1128 } 1129 1130 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1131 unsigned int tag) 1132 { 1133 if (likely(ata_tag_valid(tag))) 1134 return &ap->qcmd[tag]; 1135 return NULL; 1136 } 1137 1138 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1139 unsigned int tag) 1140 { 1141 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1142 1143 if (unlikely(!qc) || !ap->ops->error_handler) 1144 return qc; 1145 1146 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1147 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1148 return qc; 1149 1150 return NULL; 1151 } 1152 1153 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1154 { 1155 memset(tf, 0, sizeof(*tf)); 1156 1157 tf->ctl = dev->ap->ctl; 1158 if (dev->devno == 0) 1159 tf->device = ATA_DEVICE_OBS; 1160 else 1161 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1162 } 1163 1164 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1165 { 1166 qc->dma_dir = DMA_NONE; 1167 qc->__sg = NULL; 1168 qc->flags = 0; 1169 qc->cursg = qc->cursg_ofs = 0; 1170 qc->nbytes = qc->curbytes = 0; 1171 qc->n_elem = 0; 1172 qc->err_mask = 0; 1173 qc->pad_len = 0; 1174 1175 ata_tf_init(qc->dev, &qc->tf); 1176 1177 /* init result_tf such that it indicates normal completion */ 1178 qc->result_tf.command = ATA_DRDY; 1179 qc->result_tf.feature = 0; 1180 } 1181 1182 static inline int ata_try_flush_cache(const struct ata_device *dev) 1183 { 1184 return ata_id_wcache_enabled(dev->id) || 1185 ata_id_has_flush(dev->id) || 1186 ata_id_has_flush_ext(dev->id); 1187 } 1188 1189 static inline unsigned int ac_err_mask(u8 status) 1190 { 1191 if (status & (ATA_BUSY | ATA_DRQ)) 1192 return AC_ERR_HSM; 1193 if (status & (ATA_ERR | ATA_DF)) 1194 return AC_ERR_DEV; 1195 return 0; 1196 } 1197 1198 static inline unsigned int __ac_err_mask(u8 status) 1199 { 1200 unsigned int mask = ac_err_mask(status); 1201 if (mask == 0) 1202 return AC_ERR_OTHER; 1203 return mask; 1204 } 1205 1206 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1207 { 1208 ap->pad_dma = 0; 1209 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1210 &ap->pad_dma, GFP_KERNEL); 1211 return (ap->pad == NULL) ? -ENOMEM : 0; 1212 } 1213 1214 static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1215 { 1216 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1217 } 1218 1219 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1220 { 1221 return (struct ata_port *) &host->hostdata[0]; 1222 } 1223 1224 #endif /* __LINUX_LIBATA_H__ */ 1225