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