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 39 /* 40 * Define if arch has non-standard setup. This is a _PCI_ standard 41 * not a legacy or ISA standard. 42 */ 43 #ifdef CONFIG_ATA_NONSTANDARD 44 #include <asm/libata-portmap.h> 45 #else 46 #include <asm-generic/libata-portmap.h> 47 #endif 48 49 /* 50 * compile-time options: to be removed as soon as all the drivers are 51 * converted to the new debugging mechanism 52 */ 53 #undef ATA_DEBUG /* debugging output */ 54 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 55 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 56 #undef ATA_NDEBUG /* define to disable quick runtime checks */ 57 58 59 /* note: prints function name for you */ 60 #ifdef ATA_DEBUG 61 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 62 #ifdef ATA_VERBOSE_DEBUG 63 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 64 #else 65 #define VPRINTK(fmt, args...) 66 #endif /* ATA_VERBOSE_DEBUG */ 67 #else 68 #define DPRINTK(fmt, args...) 69 #define VPRINTK(fmt, args...) 70 #endif /* ATA_DEBUG */ 71 72 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 73 74 /* NEW: debug levels */ 75 #define HAVE_LIBATA_MSG 1 76 77 enum { 78 ATA_MSG_DRV = 0x0001, 79 ATA_MSG_INFO = 0x0002, 80 ATA_MSG_PROBE = 0x0004, 81 ATA_MSG_WARN = 0x0008, 82 ATA_MSG_MALLOC = 0x0010, 83 ATA_MSG_CTL = 0x0020, 84 ATA_MSG_INTR = 0x0040, 85 ATA_MSG_ERR = 0x0080, 86 }; 87 88 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 89 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 90 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 91 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 92 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 93 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 94 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 95 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 96 97 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 98 { 99 if (dval < 0 || dval >= (sizeof(u32) * 8)) 100 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 101 if (!dval) 102 return 0; 103 return (1 << dval) - 1; 104 } 105 106 /* defines only for the constants which don't work well as enums */ 107 #define ATA_TAG_POISON 0xfafbfcfdU 108 109 /* move to PCI layer? */ 110 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) 111 { 112 return &pdev->dev; 113 } 114 115 enum { 116 /* various global constants */ 117 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 118 ATA_MAX_PORTS = 8, 119 ATA_DEF_QUEUE = 1, 120 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 121 ATA_MAX_QUEUE = 32, 122 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 123 ATA_MAX_BUS = 2, 124 ATA_DEF_BUSY_WAIT = 10000, 125 ATA_SHORT_PAUSE = (HZ >> 6) + 1, 126 127 ATA_SHT_EMULATED = 1, 128 ATA_SHT_CMD_PER_LUN = 1, 129 ATA_SHT_THIS_ID = -1, 130 ATA_SHT_USE_CLUSTERING = 1, 131 132 /* struct ata_device stuff */ 133 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 134 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 135 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 136 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 137 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ 138 ATA_DFLAG_CFG_MASK = (1 << 8) - 1, 139 140 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */ 141 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */ 142 ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */ 143 ATA_DFLAG_INIT_MASK = (1 << 16) - 1, 144 145 ATA_DFLAG_DETACH = (1 << 16), 146 ATA_DFLAG_DETACHED = (1 << 17), 147 148 ATA_DEV_UNKNOWN = 0, /* unknown device */ 149 ATA_DEV_ATA = 1, /* ATA device */ 150 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 151 ATA_DEV_ATAPI = 3, /* ATAPI device */ 152 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 153 ATA_DEV_NONE = 5, /* no device */ 154 155 /* struct ata_port flags */ 156 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 157 /* (doesn't imply presence) */ 158 ATA_FLAG_SATA = (1 << 1), 159 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 160 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 161 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 162 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 163 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 164 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 165 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 166 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 167 * doesn't handle PIO interrupts */ 168 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 169 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ 170 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H 171 * Register FIS clearing BSY */ 172 ATA_FLAG_DEBUGMSG = (1 << 13), 173 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */ 174 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ 175 176 /* The following flag belongs to ap->pflags but is kept in 177 * ap->flags because it's referenced in many LLDs and will be 178 * removed in not-too-distant future. 179 */ 180 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ 181 182 /* bits 24:31 of ap->flags are reserved for LLD specific flags */ 183 184 /* struct ata_port pflags */ 185 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ 186 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ 187 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ 188 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ 189 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ 190 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ 191 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ 192 193 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */ 194 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ 195 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ 196 197 /* struct ata_queued_cmd flags */ 198 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 199 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 200 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 201 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 202 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 203 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 204 205 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 206 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 207 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 208 209 /* host set flags */ 210 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ 211 212 /* various lengths of time */ 213 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 214 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 215 ATA_TMOUT_INTERNAL = 30 * HZ, 216 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 217 218 /* ATA bus states */ 219 BUS_UNKNOWN = 0, 220 BUS_DMA = 1, 221 BUS_IDLE = 2, 222 BUS_NOINTR = 3, 223 BUS_NODATA = 4, 224 BUS_TIMER = 5, 225 BUS_PIO = 6, 226 BUS_EDD = 7, 227 BUS_IDENTIFY = 8, 228 BUS_PACKET = 9, 229 230 /* SATA port states */ 231 PORT_UNKNOWN = 0, 232 PORT_ENABLED = 1, 233 PORT_DISABLED = 2, 234 235 /* encoding various smaller bitmaps into a single 236 * unsigned int bitmap 237 */ 238 ATA_BITS_PIO = 7, 239 ATA_BITS_MWDMA = 5, 240 ATA_BITS_UDMA = 8, 241 242 ATA_SHIFT_PIO = 0, 243 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, 244 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, 245 246 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, 247 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, 248 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, 249 250 /* size of buffer to pad xfers ending on unaligned boundaries */ 251 ATA_DMA_PAD_SZ = 4, 252 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 253 254 /* masks for port functions */ 255 ATA_PORT_PRIMARY = (1 << 0), 256 ATA_PORT_SECONDARY = (1 << 1), 257 258 /* ering size */ 259 ATA_ERING_SIZE = 32, 260 261 /* desc_len for ata_eh_info and context */ 262 ATA_EH_DESC_LEN = 80, 263 264 /* reset / recovery action types */ 265 ATA_EH_REVALIDATE = (1 << 0), 266 ATA_EH_SOFTRESET = (1 << 1), 267 ATA_EH_HARDRESET = (1 << 2), 268 ATA_EH_SUSPEND = (1 << 3), 269 ATA_EH_RESUME = (1 << 4), 270 ATA_EH_PM_FREEZE = (1 << 5), 271 272 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 273 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND | 274 ATA_EH_RESUME | ATA_EH_PM_FREEZE, 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_RESET = (1 << 16), /* already reset this port */ 283 ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */ 284 ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */ 285 ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */ 286 287 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, 288 289 /* max repeat if error condition is still set after ->error_handler */ 290 ATA_EH_MAX_REPEAT = 5, 291 292 /* how hard are we gonna try to probe/recover devices */ 293 ATA_PROBE_MAX_TRIES = 3, 294 ATA_EH_RESET_TRIES = 3, 295 ATA_EH_DEV_TRIES = 3, 296 297 /* Drive spinup time (time from power-on to the first D2H FIS) 298 * in msecs - 8s currently. Failing to get ready in this time 299 * isn't critical. It will result in reset failure for 300 * controllers which can't wait for the first D2H FIS. libata 301 * will retry, so it just has to be long enough to spin up 302 * most devices. 303 */ 304 ATA_SPINUP_WAIT = 8000, 305 306 /* Horkage types. May be set by libata or controller on drives 307 (some horkage may be drive/controller pair dependant */ 308 309 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ 310 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ 311 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ 312 }; 313 314 enum hsm_task_states { 315 HSM_ST_IDLE, /* no command on going */ 316 HSM_ST, /* (waiting the device to) transfer data */ 317 HSM_ST_LAST, /* (waiting the device to) complete command */ 318 HSM_ST_ERR, /* error */ 319 HSM_ST_FIRST, /* (waiting the device to) 320 write CDB or first data block */ 321 }; 322 323 enum ata_completion_errors { 324 AC_ERR_DEV = (1 << 0), /* device reported error */ 325 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 326 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 327 AC_ERR_MEDIA = (1 << 3), /* media error */ 328 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 329 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 330 AC_ERR_SYSTEM = (1 << 6), /* system error */ 331 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 332 AC_ERR_OTHER = (1 << 8), /* unknown */ 333 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ 334 }; 335 336 /* forward declarations */ 337 struct scsi_device; 338 struct ata_port_operations; 339 struct ata_port; 340 struct ata_queued_cmd; 341 342 /* typedefs */ 343 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 344 typedef int (*ata_prereset_fn_t)(struct ata_port *ap); 345 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes); 346 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 347 348 struct ata_ioports { 349 void __iomem *cmd_addr; 350 void __iomem *data_addr; 351 void __iomem *error_addr; 352 void __iomem *feature_addr; 353 void __iomem *nsect_addr; 354 void __iomem *lbal_addr; 355 void __iomem *lbam_addr; 356 void __iomem *lbah_addr; 357 void __iomem *device_addr; 358 void __iomem *status_addr; 359 void __iomem *command_addr; 360 void __iomem *altstatus_addr; 361 void __iomem *ctl_addr; 362 void __iomem *bmdma_addr; 363 void __iomem *scr_addr; 364 }; 365 366 struct ata_probe_ent { 367 struct list_head node; 368 struct device *dev; 369 const struct ata_port_operations *port_ops; 370 struct scsi_host_template *sht; 371 struct ata_ioports port[ATA_MAX_PORTS]; 372 unsigned int n_ports; 373 unsigned int dummy_port_mask; 374 unsigned int pio_mask; 375 unsigned int mwdma_mask; 376 unsigned int udma_mask; 377 unsigned long irq; 378 unsigned long irq2; 379 unsigned int irq_flags; 380 unsigned long port_flags; 381 unsigned long _host_flags; 382 void __iomem * const *iomap; 383 void *private_data; 384 385 /* port_info for the secondary port. Together with irq2, it's 386 * used to implement non-uniform secondary port. Currently, 387 * the only user is ata_piix combined mode. This workaround 388 * will be removed together with ata_probe_ent when init model 389 * is updated. 390 */ 391 const struct ata_port_info *pinfo2; 392 }; 393 394 struct ata_host { 395 spinlock_t lock; 396 struct device *dev; 397 unsigned long irq; 398 unsigned long irq2; 399 void __iomem * const *iomap; 400 unsigned int n_ports; 401 void *private_data; 402 const struct ata_port_operations *ops; 403 unsigned long flags; 404 int simplex_claimed; /* Keep seperate in case we 405 ever need to do this locked */ 406 struct ata_port *ports[0]; 407 }; 408 409 struct ata_queued_cmd { 410 struct ata_port *ap; 411 struct ata_device *dev; 412 413 struct scsi_cmnd *scsicmd; 414 void (*scsidone)(struct scsi_cmnd *); 415 416 struct ata_taskfile tf; 417 u8 cdb[ATAPI_CDB_LEN]; 418 419 unsigned long flags; /* ATA_QCFLAG_xxx */ 420 unsigned int tag; 421 unsigned int n_elem; 422 unsigned int orig_n_elem; 423 424 int dma_dir; 425 426 unsigned int pad_len; 427 428 unsigned int nbytes; 429 unsigned int curbytes; 430 431 unsigned int cursg; 432 unsigned int cursg_ofs; 433 434 struct scatterlist sgent; 435 struct scatterlist pad_sgent; 436 void *buf_virt; 437 438 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 439 struct scatterlist *__sg; 440 441 unsigned int err_mask; 442 struct ata_taskfile result_tf; 443 ata_qc_cb_t complete_fn; 444 445 void *private_data; 446 }; 447 448 struct ata_port_stats { 449 unsigned long unhandled_irq; 450 unsigned long idle_irq; 451 unsigned long rw_reqbuf; 452 }; 453 454 struct ata_ering_entry { 455 int is_io; 456 unsigned int err_mask; 457 u64 timestamp; 458 }; 459 460 struct ata_ering { 461 int cursor; 462 struct ata_ering_entry ring[ATA_ERING_SIZE]; 463 }; 464 465 struct ata_device { 466 struct ata_port *ap; 467 unsigned int devno; /* 0 or 1 */ 468 unsigned long flags; /* ATA_DFLAG_xxx */ 469 struct scsi_device *sdev; /* attached SCSI device */ 470 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 471 u64 n_sectors; /* size of device, if ATA */ 472 unsigned int class; /* ATA_DEV_xxx */ 473 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 474 u8 pio_mode; 475 u8 dma_mode; 476 u8 xfer_mode; 477 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 478 479 unsigned int multi_count; /* sectors count for 480 READ/WRITE MULTIPLE */ 481 unsigned int max_sectors; /* per-device max sectors */ 482 unsigned int cdb_len; 483 484 /* per-dev xfer mask */ 485 unsigned int pio_mask; 486 unsigned int mwdma_mask; 487 unsigned int udma_mask; 488 489 /* for CHS addressing */ 490 u16 cylinders; /* Number of cylinders */ 491 u16 heads; /* Number of heads */ 492 u16 sectors; /* Number of sectors per track */ 493 494 /* error history */ 495 struct ata_ering ering; 496 unsigned int horkage; /* List of broken features */ 497 }; 498 499 /* Offset into struct ata_device. Fields above it are maintained 500 * acress device init. Fields below are zeroed. 501 */ 502 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 503 504 struct ata_eh_info { 505 struct ata_device *dev; /* offending device */ 506 u32 serror; /* SError from LLDD */ 507 unsigned int err_mask; /* port-wide err_mask */ 508 unsigned int action; /* ATA_EH_* action mask */ 509 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 510 unsigned int flags; /* ATA_EHI_* flags */ 511 512 unsigned long hotplug_timestamp; 513 unsigned int probe_mask; 514 515 char desc[ATA_EH_DESC_LEN]; 516 int desc_len; 517 }; 518 519 struct ata_eh_context { 520 struct ata_eh_info i; 521 int tries[ATA_MAX_DEVICES]; 522 unsigned int classes[ATA_MAX_DEVICES]; 523 unsigned int did_probe_mask; 524 }; 525 526 struct ata_port { 527 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ 528 const struct ata_port_operations *ops; 529 spinlock_t *lock; 530 unsigned long flags; /* ATA_FLAG_xxx */ 531 unsigned int pflags; /* ATA_PFLAG_xxx */ 532 unsigned int id; /* unique id req'd by scsi midlyr */ 533 unsigned int port_no; /* unique port #; from zero */ 534 535 struct ata_prd *prd; /* our SG list */ 536 dma_addr_t prd_dma; /* and its DMA mapping */ 537 538 void *pad; /* array of DMA pad buffers */ 539 dma_addr_t pad_dma; 540 541 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 542 543 u8 ctl; /* cache of ATA control register */ 544 u8 last_ctl; /* Cache last written value */ 545 unsigned int pio_mask; 546 unsigned int mwdma_mask; 547 unsigned int udma_mask; 548 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 549 unsigned int hw_sata_spd_limit; 550 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 551 552 /* record runtime error info, protected by host lock */ 553 struct ata_eh_info eh_info; 554 /* EH context owned by EH */ 555 struct ata_eh_context eh_context; 556 557 struct ata_device device[ATA_MAX_DEVICES]; 558 559 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 560 unsigned long qc_allocated; 561 unsigned int qc_active; 562 563 unsigned int active_tag; 564 u32 sactive; 565 566 struct ata_port_stats stats; 567 struct ata_host *host; 568 struct device *dev; 569 570 void *port_task_data; 571 struct delayed_work port_task; 572 struct delayed_work hotplug_task; 573 struct work_struct scsi_rescan_task; 574 575 unsigned int hsm_task_state; 576 577 u32 msg_enable; 578 struct list_head eh_done_q; 579 wait_queue_head_t eh_wait_q; 580 581 pm_message_t pm_mesg; 582 int *pm_result; 583 584 void *private_data; 585 586 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 587 }; 588 589 struct ata_port_operations { 590 void (*port_disable) (struct ata_port *); 591 592 void (*dev_config) (struct ata_port *, struct ata_device *); 593 594 void (*set_piomode) (struct ata_port *, struct ata_device *); 595 void (*set_dmamode) (struct ata_port *, struct ata_device *); 596 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long); 597 598 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 599 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 600 601 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 602 u8 (*check_status)(struct ata_port *ap); 603 u8 (*check_altstatus)(struct ata_port *ap); 604 void (*dev_select)(struct ata_port *ap, unsigned int device); 605 606 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 607 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev); 608 609 void (*post_set_mode) (struct ata_port *ap); 610 611 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 612 613 void (*bmdma_setup) (struct ata_queued_cmd *qc); 614 void (*bmdma_start) (struct ata_queued_cmd *qc); 615 616 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 617 618 void (*qc_prep) (struct ata_queued_cmd *qc); 619 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 620 621 /* Error handlers. ->error_handler overrides ->eng_timeout and 622 * indicates that new-style EH is in place. 623 */ 624 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 625 626 void (*freeze) (struct ata_port *ap); 627 void (*thaw) (struct ata_port *ap); 628 void (*error_handler) (struct ata_port *ap); 629 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 630 631 irq_handler_t irq_handler; 632 void (*irq_clear) (struct ata_port *); 633 u8 (*irq_on) (struct ata_port *); 634 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq); 635 636 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 637 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 638 u32 val); 639 640 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); 641 int (*port_resume) (struct ata_port *ap); 642 643 int (*port_start) (struct ata_port *ap); 644 void (*port_stop) (struct ata_port *ap); 645 646 void (*host_stop) (struct ata_host *host); 647 648 void (*bmdma_stop) (struct ata_queued_cmd *qc); 649 u8 (*bmdma_status) (struct ata_port *ap); 650 }; 651 652 struct ata_port_info { 653 struct scsi_host_template *sht; 654 unsigned long flags; 655 unsigned long pio_mask; 656 unsigned long mwdma_mask; 657 unsigned long udma_mask; 658 const struct ata_port_operations *port_ops; 659 void *private_data; 660 }; 661 662 struct ata_timing { 663 unsigned short mode; /* ATA mode */ 664 unsigned short setup; /* t1 */ 665 unsigned short act8b; /* t2 for 8-bit I/O */ 666 unsigned short rec8b; /* t2i for 8-bit I/O */ 667 unsigned short cyc8b; /* t0 for 8-bit I/O */ 668 unsigned short active; /* t2 or tD */ 669 unsigned short recover; /* t2i or tK */ 670 unsigned short cycle; /* t0 */ 671 unsigned short udma; /* t2CYCTYP/2 */ 672 }; 673 674 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 675 676 extern const unsigned long sata_deb_timing_normal[]; 677 extern const unsigned long sata_deb_timing_hotplug[]; 678 extern const unsigned long sata_deb_timing_long[]; 679 680 extern const struct ata_port_operations ata_dummy_port_ops; 681 682 static inline const unsigned long * 683 sata_ehc_deb_timing(struct ata_eh_context *ehc) 684 { 685 if (ehc->i.flags & ATA_EHI_HOTPLUGGED) 686 return sata_deb_timing_hotplug; 687 else 688 return sata_deb_timing_normal; 689 } 690 691 static inline int ata_port_is_dummy(struct ata_port *ap) 692 { 693 return ap->ops == &ata_dummy_port_ops; 694 } 695 696 extern void ata_port_probe(struct ata_port *); 697 extern void __sata_phy_reset(struct ata_port *ap); 698 extern void sata_phy_reset(struct ata_port *ap); 699 extern void ata_bus_reset(struct ata_port *ap); 700 extern int sata_set_spd(struct ata_port *ap); 701 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param); 702 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param); 703 extern int ata_std_prereset(struct ata_port *ap); 704 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); 705 extern int sata_port_hardreset(struct ata_port *ap, 706 const unsigned long *timing); 707 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); 708 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 709 extern void ata_port_disable(struct ata_port *); 710 extern void ata_std_ports(struct ata_ioports *ioaddr); 711 #ifdef CONFIG_PCI 712 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 713 unsigned int n_ports); 714 extern void ata_pci_remove_one (struct pci_dev *pdev); 715 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 716 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); 717 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 718 extern int ata_pci_device_resume(struct pci_dev *pdev); 719 extern int ata_pci_clear_simplex(struct pci_dev *pdev); 720 #endif /* CONFIG_PCI */ 721 extern int ata_device_add(const struct ata_probe_ent *ent); 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 extern int ata_scsi_device_resume(struct scsi_device *); 745 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg); 746 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); 747 extern void ata_host_resume(struct ata_host *host); 748 extern int ata_ratelimit(void); 749 extern int ata_busy_sleep(struct ata_port *ap, 750 unsigned long timeout_pat, unsigned long timeout); 751 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, 752 void *data, unsigned long delay); 753 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 754 unsigned long interval_msec, 755 unsigned long timeout_msec); 756 757 /* 758 * Default driver ops implementations 759 */ 760 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 761 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 762 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 763 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 764 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 765 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 766 extern u8 ata_check_status(struct ata_port *ap); 767 extern u8 ata_altstatus(struct ata_port *ap); 768 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 769 extern int ata_port_start (struct ata_port *ap); 770 extern irqreturn_t ata_interrupt (int irq, void *dev_instance); 771 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, 772 unsigned int buflen, int write_data); 773 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 774 unsigned int buflen, int write_data); 775 extern void ata_qc_prep(struct ata_queued_cmd *qc); 776 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 777 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 778 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 779 unsigned int buflen); 780 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 781 unsigned int n_elem); 782 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 783 extern void ata_id_string(const u16 *id, unsigned char *s, 784 unsigned int ofs, unsigned int len); 785 extern void ata_id_c_string(const u16 *id, unsigned char *s, 786 unsigned int ofs, unsigned int len); 787 extern unsigned long ata_device_blacklisted(const struct ata_device *dev); 788 extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 789 extern void ata_bmdma_start (struct ata_queued_cmd *qc); 790 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 791 extern u8 ata_bmdma_status(struct ata_port *ap); 792 extern void ata_bmdma_irq_clear(struct ata_port *ap); 793 extern void ata_bmdma_freeze(struct ata_port *ap); 794 extern void ata_bmdma_thaw(struct ata_port *ap); 795 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 796 ata_reset_fn_t softreset, 797 ata_reset_fn_t hardreset, 798 ata_postreset_fn_t postreset); 799 extern void ata_bmdma_error_handler(struct ata_port *ap); 800 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 801 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 802 u8 status, int in_wq); 803 extern void ata_qc_complete(struct ata_queued_cmd *qc); 804 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 805 void (*finish_qc)(struct ata_queued_cmd *)); 806 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 807 void (*done)(struct scsi_cmnd *)); 808 extern int ata_std_bios_param(struct scsi_device *sdev, 809 struct block_device *bdev, 810 sector_t capacity, int geom[]); 811 extern int ata_scsi_slave_config(struct scsi_device *sdev); 812 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 813 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 814 int queue_depth); 815 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 816 extern u8 ata_irq_on(struct ata_port *ap); 817 extern u8 ata_dummy_irq_on(struct ata_port *ap); 818 extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); 819 extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); 820 821 /* 822 * Timing helpers 823 */ 824 825 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 826 extern int ata_timing_compute(struct ata_device *, unsigned short, 827 struct ata_timing *, int, int); 828 extern void ata_timing_merge(const struct ata_timing *, 829 const struct ata_timing *, struct ata_timing *, 830 unsigned int); 831 832 enum { 833 ATA_TIMING_SETUP = (1 << 0), 834 ATA_TIMING_ACT8B = (1 << 1), 835 ATA_TIMING_REC8B = (1 << 2), 836 ATA_TIMING_CYC8B = (1 << 3), 837 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 838 ATA_TIMING_CYC8B, 839 ATA_TIMING_ACTIVE = (1 << 4), 840 ATA_TIMING_RECOVER = (1 << 5), 841 ATA_TIMING_CYCLE = (1 << 6), 842 ATA_TIMING_UDMA = (1 << 7), 843 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 844 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 845 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 846 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 847 }; 848 849 850 #ifdef CONFIG_PCI 851 struct pci_bits { 852 unsigned int reg; /* PCI config register to read */ 853 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 854 unsigned long mask; 855 unsigned long val; 856 }; 857 858 extern struct ata_probe_ent * 859 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); 860 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 861 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long); 862 #endif /* CONFIG_PCI */ 863 864 /* 865 * EH 866 */ 867 extern void ata_eng_timeout(struct ata_port *ap); 868 869 extern void ata_port_schedule_eh(struct ata_port *ap); 870 extern int ata_port_abort(struct ata_port *ap); 871 extern int ata_port_freeze(struct ata_port *ap); 872 873 extern void ata_eh_freeze_port(struct ata_port *ap); 874 extern void ata_eh_thaw_port(struct ata_port *ap); 875 876 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 877 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 878 879 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 880 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 881 ata_postreset_fn_t postreset); 882 883 /* 884 * printk helpers 885 */ 886 #define ata_port_printk(ap, lv, fmt, args...) \ 887 printk(lv"ata%u: "fmt, (ap)->id , ##args) 888 889 #define ata_dev_printk(dev, lv, fmt, args...) \ 890 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args) 891 892 /* 893 * ata_eh_info helpers 894 */ 895 #define ata_ehi_push_desc(ehi, fmt, args...) do { \ 896 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 897 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 898 fmt , ##args); \ 899 } while (0) 900 901 #define ata_ehi_clear_desc(ehi) do { \ 902 (ehi)->desc[0] = '\0'; \ 903 (ehi)->desc_len = 0; \ 904 } while (0) 905 906 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi) 907 { 908 if (ehi->flags & ATA_EHI_HOTPLUGGED) 909 return; 910 911 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK; 912 ehi->hotplug_timestamp = jiffies; 913 914 ehi->action |= ATA_EH_SOFTRESET; 915 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 916 } 917 918 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 919 { 920 __ata_ehi_hotplugged(ehi); 921 ehi->err_mask |= AC_ERR_ATA_BUS; 922 } 923 924 /* 925 * qc helpers 926 */ 927 static inline int 928 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 929 { 930 if (sg == &qc->pad_sgent) 931 return 1; 932 if (qc->pad_len) 933 return 0; 934 if (((sg - qc->__sg) + 1) == qc->n_elem) 935 return 1; 936 return 0; 937 } 938 939 static inline struct scatterlist * 940 ata_qc_first_sg(struct ata_queued_cmd *qc) 941 { 942 if (qc->n_elem) 943 return qc->__sg; 944 if (qc->pad_len) 945 return &qc->pad_sgent; 946 return NULL; 947 } 948 949 static inline struct scatterlist * 950 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 951 { 952 if (sg == &qc->pad_sgent) 953 return NULL; 954 if (++sg - qc->__sg < qc->n_elem) 955 return sg; 956 if (qc->pad_len) 957 return &qc->pad_sgent; 958 return NULL; 959 } 960 961 #define ata_for_each_sg(sg, qc) \ 962 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 963 964 static inline unsigned int ata_tag_valid(unsigned int tag) 965 { 966 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 967 } 968 969 static inline unsigned int ata_tag_internal(unsigned int tag) 970 { 971 return tag == ATA_MAX_QUEUE - 1; 972 } 973 974 /* 975 * device helpers 976 */ 977 static inline unsigned int ata_class_enabled(unsigned int class) 978 { 979 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 980 } 981 982 static inline unsigned int ata_class_disabled(unsigned int class) 983 { 984 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 985 } 986 987 static inline unsigned int ata_class_absent(unsigned int class) 988 { 989 return !ata_class_enabled(class) && !ata_class_disabled(class); 990 } 991 992 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 993 { 994 return ata_class_enabled(dev->class); 995 } 996 997 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 998 { 999 return ata_class_disabled(dev->class); 1000 } 1001 1002 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 1003 { 1004 return ata_class_absent(dev->class); 1005 } 1006 1007 static inline unsigned int ata_dev_ready(const struct ata_device *dev) 1008 { 1009 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED); 1010 } 1011 1012 /* 1013 * port helpers 1014 */ 1015 static inline int ata_port_max_devices(const struct ata_port *ap) 1016 { 1017 if (ap->flags & ATA_FLAG_SLAVE_POSS) 1018 return 2; 1019 return 1; 1020 } 1021 1022 1023 static inline u8 ata_chk_status(struct ata_port *ap) 1024 { 1025 return ap->ops->check_status(ap); 1026 } 1027 1028 1029 /** 1030 * ata_pause - Flush writes and pause 400 nanoseconds. 1031 * @ap: Port to wait for. 1032 * 1033 * LOCKING: 1034 * Inherited from caller. 1035 */ 1036 1037 static inline void ata_pause(struct ata_port *ap) 1038 { 1039 ata_altstatus(ap); 1040 ndelay(400); 1041 } 1042 1043 1044 /** 1045 * ata_busy_wait - Wait for a port status register 1046 * @ap: Port to wait for. 1047 * @bits: bits that must be clear 1048 * @max: number of 10uS waits to perform 1049 * 1050 * Waits up to max*10 microseconds for the selected bits in the port's 1051 * status register to be cleared. 1052 * Returns final value of status register. 1053 * 1054 * LOCKING: 1055 * Inherited from caller. 1056 */ 1057 1058 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 1059 unsigned int max) 1060 { 1061 u8 status; 1062 1063 do { 1064 udelay(10); 1065 status = ata_chk_status(ap); 1066 max--; 1067 } while (status != 0xff && (status & bits) && (max > 0)); 1068 1069 return status; 1070 } 1071 1072 1073 /** 1074 * ata_wait_idle - Wait for a port to be idle. 1075 * @ap: Port to wait for. 1076 * 1077 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 1078 * Returns final value of status register. 1079 * 1080 * LOCKING: 1081 * Inherited from caller. 1082 */ 1083 1084 static inline u8 ata_wait_idle(struct ata_port *ap) 1085 { 1086 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 1087 1088 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) { 1089 if (ata_msg_warn(ap)) 1090 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n", 1091 status, ap->ioaddr.status_addr); 1092 } 1093 1094 return status; 1095 } 1096 1097 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1098 { 1099 qc->tf.ctl |= ATA_NIEN; 1100 } 1101 1102 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1103 unsigned int tag) 1104 { 1105 if (likely(ata_tag_valid(tag))) 1106 return &ap->qcmd[tag]; 1107 return NULL; 1108 } 1109 1110 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1111 unsigned int tag) 1112 { 1113 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1114 1115 if (unlikely(!qc) || !ap->ops->error_handler) 1116 return qc; 1117 1118 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1119 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1120 return qc; 1121 1122 return NULL; 1123 } 1124 1125 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1126 { 1127 memset(tf, 0, sizeof(*tf)); 1128 1129 tf->ctl = dev->ap->ctl; 1130 if (dev->devno == 0) 1131 tf->device = ATA_DEVICE_OBS; 1132 else 1133 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1134 } 1135 1136 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1137 { 1138 qc->dma_dir = DMA_NONE; 1139 qc->__sg = NULL; 1140 qc->flags = 0; 1141 qc->cursg = qc->cursg_ofs = 0; 1142 qc->nbytes = qc->curbytes = 0; 1143 qc->n_elem = 0; 1144 qc->err_mask = 0; 1145 qc->pad_len = 0; 1146 1147 ata_tf_init(qc->dev, &qc->tf); 1148 1149 /* init result_tf such that it indicates normal completion */ 1150 qc->result_tf.command = ATA_DRDY; 1151 qc->result_tf.feature = 0; 1152 } 1153 1154 static inline int ata_try_flush_cache(const struct ata_device *dev) 1155 { 1156 return ata_id_wcache_enabled(dev->id) || 1157 ata_id_has_flush(dev->id) || 1158 ata_id_has_flush_ext(dev->id); 1159 } 1160 1161 static inline unsigned int ac_err_mask(u8 status) 1162 { 1163 if (status & (ATA_BUSY | ATA_DRQ)) 1164 return AC_ERR_HSM; 1165 if (status & (ATA_ERR | ATA_DF)) 1166 return AC_ERR_DEV; 1167 return 0; 1168 } 1169 1170 static inline unsigned int __ac_err_mask(u8 status) 1171 { 1172 unsigned int mask = ac_err_mask(status); 1173 if (mask == 0) 1174 return AC_ERR_OTHER; 1175 return mask; 1176 } 1177 1178 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1179 { 1180 ap->pad_dma = 0; 1181 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1182 &ap->pad_dma, GFP_KERNEL); 1183 return (ap->pad == NULL) ? -ENOMEM : 0; 1184 } 1185 1186 static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1187 { 1188 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1189 } 1190 1191 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1192 { 1193 return (struct ata_port *) &host->hostdata[0]; 1194 } 1195 1196 #endif /* __LINUX_LIBATA_H__ */ 1197