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 <asm/io.h> 35 #include <linux/ata.h> 36 #include <linux/workqueue.h> 37 #include <scsi/scsi_host.h> 38 39 /* 40 * compile-time options: to be removed as soon as all the drivers are 41 * converted to the new debugging mechanism 42 */ 43 #undef ATA_DEBUG /* debugging output */ 44 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 45 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 46 #undef ATA_NDEBUG /* define to disable quick runtime checks */ 47 #undef ATA_ENABLE_PATA /* define to enable PATA support in some 48 * low-level drivers */ 49 50 51 /* note: prints function name for you */ 52 #ifdef ATA_DEBUG 53 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 54 #ifdef ATA_VERBOSE_DEBUG 55 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 56 #else 57 #define VPRINTK(fmt, args...) 58 #endif /* ATA_VERBOSE_DEBUG */ 59 #else 60 #define DPRINTK(fmt, args...) 61 #define VPRINTK(fmt, args...) 62 #endif /* ATA_DEBUG */ 63 64 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 65 66 /* NEW: debug levels */ 67 #define HAVE_LIBATA_MSG 1 68 69 enum { 70 ATA_MSG_DRV = 0x0001, 71 ATA_MSG_INFO = 0x0002, 72 ATA_MSG_PROBE = 0x0004, 73 ATA_MSG_WARN = 0x0008, 74 ATA_MSG_MALLOC = 0x0010, 75 ATA_MSG_CTL = 0x0020, 76 ATA_MSG_INTR = 0x0040, 77 ATA_MSG_ERR = 0x0080, 78 }; 79 80 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 81 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 82 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 83 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 84 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 85 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 86 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 87 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 88 89 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 90 { 91 if (dval < 0 || dval >= (sizeof(u32) * 8)) 92 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 93 if (!dval) 94 return 0; 95 return (1 << dval) - 1; 96 } 97 98 /* defines only for the constants which don't work well as enums */ 99 #define ATA_TAG_POISON 0xfafbfcfdU 100 101 /* move to PCI layer? */ 102 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) 103 { 104 return &pdev->dev; 105 } 106 107 enum { 108 /* various global constants */ 109 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 110 ATA_MAX_PORTS = 8, 111 ATA_DEF_QUEUE = 1, 112 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 113 ATA_MAX_QUEUE = 32, 114 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 115 ATA_MAX_SECTORS = 200, /* FIXME */ 116 ATA_MAX_SECTORS_LBA48 = 65535, 117 ATA_MAX_BUS = 2, 118 ATA_DEF_BUSY_WAIT = 10000, 119 ATA_SHORT_PAUSE = (HZ >> 6) + 1, 120 121 ATA_SHT_EMULATED = 1, 122 ATA_SHT_CMD_PER_LUN = 1, 123 ATA_SHT_THIS_ID = -1, 124 ATA_SHT_USE_CLUSTERING = 1, 125 126 /* struct ata_device stuff */ 127 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 128 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 129 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 130 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 131 ATA_DFLAG_CFG_MASK = (1 << 8) - 1, 132 133 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */ 134 ATA_DFLAG_INIT_MASK = (1 << 16) - 1, 135 136 ATA_DFLAG_DETACH = (1 << 16), 137 ATA_DFLAG_DETACHED = (1 << 17), 138 139 ATA_DEV_UNKNOWN = 0, /* unknown device */ 140 ATA_DEV_ATA = 1, /* ATA device */ 141 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 142 ATA_DEV_ATAPI = 3, /* ATAPI device */ 143 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 144 ATA_DEV_NONE = 5, /* no device */ 145 146 /* struct ata_port flags */ 147 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 148 /* (doesn't imply presence) */ 149 ATA_FLAG_SATA = (1 << 1), 150 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 151 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 152 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 153 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 154 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 155 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 156 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 157 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 158 * doesn't handle PIO interrupts */ 159 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 160 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ 161 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H 162 * Register FIS clearing BSY */ 163 164 ATA_FLAG_DEBUGMSG = (1 << 13), 165 ATA_FLAG_FLUSH_PORT_TASK = (1 << 14), /* flush port task */ 166 167 ATA_FLAG_EH_PENDING = (1 << 15), /* EH pending */ 168 ATA_FLAG_EH_IN_PROGRESS = (1 << 16), /* EH in progress */ 169 ATA_FLAG_FROZEN = (1 << 17), /* port is frozen */ 170 ATA_FLAG_RECOVERED = (1 << 18), /* recovery action performed */ 171 ATA_FLAG_LOADING = (1 << 19), /* boot/loading probe */ 172 ATA_FLAG_UNLOADING = (1 << 20), /* module is unloading */ 173 ATA_FLAG_SCSI_HOTPLUG = (1 << 21), /* SCSI hotplug scheduled */ 174 175 ATA_FLAG_DISABLED = (1 << 22), /* port is disabled, ignore it */ 176 ATA_FLAG_SUSPENDED = (1 << 23), /* port is suspended (power) */ 177 178 /* bits 24:31 of ap->flags are reserved for LLDD specific flags */ 179 180 /* struct ata_queued_cmd flags */ 181 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 182 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 183 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 184 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 185 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 186 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 187 188 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 189 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 190 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 191 192 /* host set flags */ 193 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */ 194 195 /* various lengths of time */ 196 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 197 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 198 ATA_TMOUT_INTERNAL = 30 * HZ, 199 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 200 201 /* ATA bus states */ 202 BUS_UNKNOWN = 0, 203 BUS_DMA = 1, 204 BUS_IDLE = 2, 205 BUS_NOINTR = 3, 206 BUS_NODATA = 4, 207 BUS_TIMER = 5, 208 BUS_PIO = 6, 209 BUS_EDD = 7, 210 BUS_IDENTIFY = 8, 211 BUS_PACKET = 9, 212 213 /* SATA port states */ 214 PORT_UNKNOWN = 0, 215 PORT_ENABLED = 1, 216 PORT_DISABLED = 2, 217 218 /* encoding various smaller bitmaps into a single 219 * unsigned int bitmap 220 */ 221 ATA_BITS_PIO = 5, 222 ATA_BITS_MWDMA = 3, 223 ATA_BITS_UDMA = 8, 224 225 ATA_SHIFT_PIO = 0, 226 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, 227 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, 228 229 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, 230 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, 231 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, 232 233 /* size of buffer to pad xfers ending on unaligned boundaries */ 234 ATA_DMA_PAD_SZ = 4, 235 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 236 237 /* masks for port functions */ 238 ATA_PORT_PRIMARY = (1 << 0), 239 ATA_PORT_SECONDARY = (1 << 1), 240 241 /* ering size */ 242 ATA_ERING_SIZE = 32, 243 244 /* desc_len for ata_eh_info and context */ 245 ATA_EH_DESC_LEN = 80, 246 247 /* reset / recovery action types */ 248 ATA_EH_REVALIDATE = (1 << 0), 249 ATA_EH_SOFTRESET = (1 << 1), 250 ATA_EH_HARDRESET = (1 << 2), 251 252 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 253 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, 254 255 /* ata_eh_info->flags */ 256 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 257 258 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */ 259 260 /* max repeat if error condition is still set after ->error_handler */ 261 ATA_EH_MAX_REPEAT = 5, 262 263 /* how hard are we gonna try to probe/recover devices */ 264 ATA_PROBE_MAX_TRIES = 3, 265 ATA_EH_RESET_TRIES = 3, 266 ATA_EH_DEV_TRIES = 3, 267 268 /* Drive spinup time (time from power-on to the first D2H FIS) 269 * in msecs - 8s currently. Failing to get ready in this time 270 * isn't critical. It will result in reset failure for 271 * controllers which can't wait for the first D2H FIS. libata 272 * will retry, so it just has to be long enough to spin up 273 * most devices. 274 */ 275 ATA_SPINUP_WAIT = 8000, 276 }; 277 278 enum hsm_task_states { 279 HSM_ST_UNKNOWN, /* state unknown */ 280 HSM_ST_IDLE, /* no command on going */ 281 HSM_ST, /* (waiting the device to) transfer data */ 282 HSM_ST_LAST, /* (waiting the device to) complete command */ 283 HSM_ST_ERR, /* error */ 284 HSM_ST_FIRST, /* (waiting the device to) 285 write CDB or first data block */ 286 }; 287 288 enum ata_completion_errors { 289 AC_ERR_DEV = (1 << 0), /* device reported error */ 290 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 291 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 292 AC_ERR_MEDIA = (1 << 3), /* media error */ 293 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 294 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 295 AC_ERR_SYSTEM = (1 << 6), /* system error */ 296 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 297 AC_ERR_OTHER = (1 << 8), /* unknown */ 298 }; 299 300 /* forward declarations */ 301 struct scsi_device; 302 struct ata_port_operations; 303 struct ata_port; 304 struct ata_queued_cmd; 305 306 /* typedefs */ 307 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 308 typedef int (*ata_prereset_fn_t)(struct ata_port *ap); 309 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes); 310 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 311 312 struct ata_ioports { 313 unsigned long cmd_addr; 314 unsigned long data_addr; 315 unsigned long error_addr; 316 unsigned long feature_addr; 317 unsigned long nsect_addr; 318 unsigned long lbal_addr; 319 unsigned long lbam_addr; 320 unsigned long lbah_addr; 321 unsigned long device_addr; 322 unsigned long status_addr; 323 unsigned long command_addr; 324 unsigned long altstatus_addr; 325 unsigned long ctl_addr; 326 unsigned long bmdma_addr; 327 unsigned long scr_addr; 328 }; 329 330 struct ata_probe_ent { 331 struct list_head node; 332 struct device *dev; 333 const struct ata_port_operations *port_ops; 334 struct scsi_host_template *sht; 335 struct ata_ioports port[ATA_MAX_PORTS]; 336 unsigned int n_ports; 337 unsigned int hard_port_no; 338 unsigned int pio_mask; 339 unsigned int mwdma_mask; 340 unsigned int udma_mask; 341 unsigned int legacy_mode; 342 unsigned long irq; 343 unsigned int irq_flags; 344 unsigned long host_flags; 345 unsigned long host_set_flags; 346 void __iomem *mmio_base; 347 void *private_data; 348 }; 349 350 struct ata_host_set { 351 spinlock_t lock; 352 struct device *dev; 353 unsigned long irq; 354 void __iomem *mmio_base; 355 unsigned int n_ports; 356 void *private_data; 357 const struct ata_port_operations *ops; 358 unsigned long flags; 359 int simplex_claimed; /* Keep seperate in case we 360 ever need to do this locked */ 361 struct ata_host_set *next; /* for legacy mode */ 362 struct ata_port *ports[0]; 363 }; 364 365 struct ata_queued_cmd { 366 struct ata_port *ap; 367 struct ata_device *dev; 368 369 struct scsi_cmnd *scsicmd; 370 void (*scsidone)(struct scsi_cmnd *); 371 372 struct ata_taskfile tf; 373 u8 cdb[ATAPI_CDB_LEN]; 374 375 unsigned long flags; /* ATA_QCFLAG_xxx */ 376 unsigned int tag; 377 unsigned int n_elem; 378 unsigned int orig_n_elem; 379 380 int dma_dir; 381 382 unsigned int pad_len; 383 384 unsigned int nsect; 385 unsigned int cursect; 386 387 unsigned int nbytes; 388 unsigned int curbytes; 389 390 unsigned int cursg; 391 unsigned int cursg_ofs; 392 393 struct scatterlist sgent; 394 struct scatterlist pad_sgent; 395 void *buf_virt; 396 397 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 398 struct scatterlist *__sg; 399 400 unsigned int err_mask; 401 struct ata_taskfile result_tf; 402 ata_qc_cb_t complete_fn; 403 404 void *private_data; 405 }; 406 407 struct ata_host_stats { 408 unsigned long unhandled_irq; 409 unsigned long idle_irq; 410 unsigned long rw_reqbuf; 411 }; 412 413 struct ata_ering_entry { 414 int is_io; 415 unsigned int err_mask; 416 u64 timestamp; 417 }; 418 419 struct ata_ering { 420 int cursor; 421 struct ata_ering_entry ring[ATA_ERING_SIZE]; 422 }; 423 424 struct ata_device { 425 struct ata_port *ap; 426 unsigned int devno; /* 0 or 1 */ 427 unsigned long flags; /* ATA_DFLAG_xxx */ 428 struct scsi_device *sdev; /* attached SCSI device */ 429 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 430 u64 n_sectors; /* size of device, if ATA */ 431 unsigned int class; /* ATA_DEV_xxx */ 432 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 433 u8 pio_mode; 434 u8 dma_mode; 435 u8 xfer_mode; 436 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 437 438 unsigned int multi_count; /* sectors count for 439 READ/WRITE MULTIPLE */ 440 unsigned int max_sectors; /* per-device max sectors */ 441 unsigned int cdb_len; 442 443 /* per-dev xfer mask */ 444 unsigned int pio_mask; 445 unsigned int mwdma_mask; 446 unsigned int udma_mask; 447 448 /* for CHS addressing */ 449 u16 cylinders; /* Number of cylinders */ 450 u16 heads; /* Number of heads */ 451 u16 sectors; /* Number of sectors per track */ 452 453 /* error history */ 454 struct ata_ering ering; 455 }; 456 457 /* Offset into struct ata_device. Fields above it are maintained 458 * acress device init. Fields below are zeroed. 459 */ 460 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 461 462 struct ata_eh_info { 463 struct ata_device *dev; /* offending device */ 464 u32 serror; /* SError from LLDD */ 465 unsigned int err_mask; /* port-wide err_mask */ 466 unsigned int action; /* ATA_EH_* action mask */ 467 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ 468 unsigned int flags; /* ATA_EHI_* flags */ 469 470 unsigned long hotplug_timestamp; 471 unsigned int probe_mask; 472 473 char desc[ATA_EH_DESC_LEN]; 474 int desc_len; 475 }; 476 477 struct ata_eh_context { 478 struct ata_eh_info i; 479 int tries[ATA_MAX_DEVICES]; 480 unsigned int classes[ATA_MAX_DEVICES]; 481 unsigned int did_probe_mask; 482 }; 483 484 struct ata_port { 485 struct Scsi_Host *host; /* our co-allocated scsi host */ 486 const struct ata_port_operations *ops; 487 spinlock_t *lock; 488 unsigned long flags; /* ATA_FLAG_xxx */ 489 unsigned int id; /* unique id req'd by scsi midlyr */ 490 unsigned int port_no; /* unique port #; from zero */ 491 unsigned int hard_port_no; /* hardware port #; from zero */ 492 493 struct ata_prd *prd; /* our SG list */ 494 dma_addr_t prd_dma; /* and its DMA mapping */ 495 496 void *pad; /* array of DMA pad buffers */ 497 dma_addr_t pad_dma; 498 499 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 500 501 u8 ctl; /* cache of ATA control register */ 502 u8 last_ctl; /* Cache last written value */ 503 unsigned int pio_mask; 504 unsigned int mwdma_mask; 505 unsigned int udma_mask; 506 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 507 unsigned int hw_sata_spd_limit; 508 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 509 510 /* record runtime error info, protected by host_set lock */ 511 struct ata_eh_info eh_info; 512 /* EH context owned by EH */ 513 struct ata_eh_context eh_context; 514 515 struct ata_device device[ATA_MAX_DEVICES]; 516 517 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 518 unsigned long qc_allocated; 519 unsigned int qc_active; 520 521 unsigned int active_tag; 522 u32 sactive; 523 524 struct ata_host_stats stats; 525 struct ata_host_set *host_set; 526 struct device *dev; 527 528 struct work_struct port_task; 529 struct work_struct hotplug_task; 530 struct work_struct scsi_rescan_task; 531 532 unsigned int hsm_task_state; 533 534 u32 msg_enable; 535 struct list_head eh_done_q; 536 wait_queue_head_t eh_wait_q; 537 538 void *private_data; 539 540 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 541 }; 542 543 struct ata_port_operations { 544 void (*port_disable) (struct ata_port *); 545 546 void (*dev_config) (struct ata_port *, struct ata_device *); 547 548 void (*set_piomode) (struct ata_port *, struct ata_device *); 549 void (*set_dmamode) (struct ata_port *, struct ata_device *); 550 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long); 551 552 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 553 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 554 555 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 556 u8 (*check_status)(struct ata_port *ap); 557 u8 (*check_altstatus)(struct ata_port *ap); 558 void (*dev_select)(struct ata_port *ap, unsigned int device); 559 560 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 561 void (*set_mode) (struct ata_port *ap); 562 563 void (*post_set_mode) (struct ata_port *ap); 564 565 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 566 567 void (*bmdma_setup) (struct ata_queued_cmd *qc); 568 void (*bmdma_start) (struct ata_queued_cmd *qc); 569 570 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 571 572 void (*qc_prep) (struct ata_queued_cmd *qc); 573 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 574 575 /* Error handlers. ->error_handler overrides ->eng_timeout and 576 * indicates that new-style EH is in place. 577 */ 578 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 579 580 void (*freeze) (struct ata_port *ap); 581 void (*thaw) (struct ata_port *ap); 582 void (*error_handler) (struct ata_port *ap); 583 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 584 585 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); 586 void (*irq_clear) (struct ata_port *); 587 588 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 589 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 590 u32 val); 591 592 int (*port_start) (struct ata_port *ap); 593 void (*port_stop) (struct ata_port *ap); 594 595 void (*host_stop) (struct ata_host_set *host_set); 596 597 void (*bmdma_stop) (struct ata_queued_cmd *qc); 598 u8 (*bmdma_status) (struct ata_port *ap); 599 }; 600 601 struct ata_port_info { 602 struct scsi_host_template *sht; 603 unsigned long host_flags; 604 unsigned long pio_mask; 605 unsigned long mwdma_mask; 606 unsigned long udma_mask; 607 const struct ata_port_operations *port_ops; 608 void *private_data; 609 }; 610 611 struct ata_timing { 612 unsigned short mode; /* ATA mode */ 613 unsigned short setup; /* t1 */ 614 unsigned short act8b; /* t2 for 8-bit I/O */ 615 unsigned short rec8b; /* t2i for 8-bit I/O */ 616 unsigned short cyc8b; /* t0 for 8-bit I/O */ 617 unsigned short active; /* t2 or tD */ 618 unsigned short recover; /* t2i or tK */ 619 unsigned short cycle; /* t0 */ 620 unsigned short udma; /* t2CYCTYP/2 */ 621 }; 622 623 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 624 625 extern const unsigned long sata_deb_timing_boot[]; 626 extern const unsigned long sata_deb_timing_eh[]; 627 extern const unsigned long sata_deb_timing_before_fsrst[]; 628 629 extern void ata_port_probe(struct ata_port *); 630 extern void __sata_phy_reset(struct ata_port *ap); 631 extern void sata_phy_reset(struct ata_port *ap); 632 extern void ata_bus_reset(struct ata_port *ap); 633 extern int sata_set_spd(struct ata_port *ap); 634 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param); 635 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param); 636 extern int ata_std_prereset(struct ata_port *ap); 637 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); 638 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); 639 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 640 extern int ata_dev_revalidate(struct ata_device *dev, int post_reset); 641 extern void ata_port_disable(struct ata_port *); 642 extern void ata_std_ports(struct ata_ioports *ioaddr); 643 #ifdef CONFIG_PCI 644 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 645 unsigned int n_ports); 646 extern void ata_pci_remove_one (struct pci_dev *pdev); 647 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state); 648 extern int ata_pci_device_resume(struct pci_dev *pdev); 649 extern int ata_pci_clear_simplex(struct pci_dev *pdev); 650 #endif /* CONFIG_PCI */ 651 extern int ata_device_add(const struct ata_probe_ent *ent); 652 extern void ata_port_detach(struct ata_port *ap); 653 extern void ata_host_set_remove(struct ata_host_set *host_set); 654 extern int ata_scsi_detect(struct scsi_host_template *sht); 655 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 656 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 657 extern int ata_scsi_release(struct Scsi_Host *host); 658 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 659 extern int sata_scr_valid(struct ata_port *ap); 660 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 661 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 662 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 663 extern int ata_port_online(struct ata_port *ap); 664 extern int ata_port_offline(struct ata_port *ap); 665 extern int ata_scsi_device_resume(struct scsi_device *); 666 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state); 667 extern int ata_device_resume(struct ata_device *); 668 extern int ata_device_suspend(struct ata_device *, pm_message_t state); 669 extern int ata_ratelimit(void); 670 extern unsigned int ata_busy_sleep(struct ata_port *ap, 671 unsigned long timeout_pat, 672 unsigned long timeout); 673 extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), 674 void *data, unsigned long delay); 675 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, 676 unsigned long interval_msec, 677 unsigned long timeout_msec); 678 679 /* 680 * Default driver ops implementations 681 */ 682 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 683 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 684 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 685 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 686 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 687 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 688 extern u8 ata_check_status(struct ata_port *ap); 689 extern u8 ata_altstatus(struct ata_port *ap); 690 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 691 extern int ata_port_start (struct ata_port *ap); 692 extern void ata_port_stop (struct ata_port *ap); 693 extern void ata_host_stop (struct ata_host_set *host_set); 694 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); 695 extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf, 696 unsigned int buflen, int write_data); 697 extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf, 698 unsigned int buflen, int write_data); 699 extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 700 unsigned int buflen, int write_data); 701 extern void ata_qc_prep(struct ata_queued_cmd *qc); 702 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 703 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 704 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 705 unsigned int buflen); 706 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 707 unsigned int n_elem); 708 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 709 extern void ata_id_string(const u16 *id, unsigned char *s, 710 unsigned int ofs, unsigned int len); 711 extern void ata_id_c_string(const u16 *id, unsigned char *s, 712 unsigned int ofs, unsigned int len); 713 extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 714 extern void ata_bmdma_start (struct ata_queued_cmd *qc); 715 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 716 extern u8 ata_bmdma_status(struct ata_port *ap); 717 extern void ata_bmdma_irq_clear(struct ata_port *ap); 718 extern void ata_bmdma_freeze(struct ata_port *ap); 719 extern void ata_bmdma_thaw(struct ata_port *ap); 720 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 721 ata_reset_fn_t softreset, 722 ata_reset_fn_t hardreset, 723 ata_postreset_fn_t postreset); 724 extern void ata_bmdma_error_handler(struct ata_port *ap); 725 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 726 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 727 u8 status, int in_wq); 728 extern void ata_qc_complete(struct ata_queued_cmd *qc); 729 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 730 void (*finish_qc)(struct ata_queued_cmd *)); 731 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 732 void (*done)(struct scsi_cmnd *)); 733 extern int ata_std_bios_param(struct scsi_device *sdev, 734 struct block_device *bdev, 735 sector_t capacity, int geom[]); 736 extern int ata_scsi_slave_config(struct scsi_device *sdev); 737 extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 738 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 739 int queue_depth); 740 extern struct ata_device *ata_dev_pair(struct ata_device *adev); 741 742 /* 743 * Timing helpers 744 */ 745 746 extern unsigned int ata_pio_need_iordy(const struct ata_device *); 747 extern int ata_timing_compute(struct ata_device *, unsigned short, 748 struct ata_timing *, int, int); 749 extern void ata_timing_merge(const struct ata_timing *, 750 const struct ata_timing *, struct ata_timing *, 751 unsigned int); 752 753 enum { 754 ATA_TIMING_SETUP = (1 << 0), 755 ATA_TIMING_ACT8B = (1 << 1), 756 ATA_TIMING_REC8B = (1 << 2), 757 ATA_TIMING_CYC8B = (1 << 3), 758 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 759 ATA_TIMING_CYC8B, 760 ATA_TIMING_ACTIVE = (1 << 4), 761 ATA_TIMING_RECOVER = (1 << 5), 762 ATA_TIMING_CYCLE = (1 << 6), 763 ATA_TIMING_UDMA = (1 << 7), 764 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 765 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 766 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 767 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 768 }; 769 770 771 #ifdef CONFIG_PCI 772 struct pci_bits { 773 unsigned int reg; /* PCI config register to read */ 774 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 775 unsigned long mask; 776 unsigned long val; 777 }; 778 779 extern void ata_pci_host_stop (struct ata_host_set *host_set); 780 extern struct ata_probe_ent * 781 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); 782 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 783 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long); 784 #endif /* CONFIG_PCI */ 785 786 /* 787 * EH 788 */ 789 extern void ata_eng_timeout(struct ata_port *ap); 790 791 extern void ata_port_schedule_eh(struct ata_port *ap); 792 extern int ata_port_abort(struct ata_port *ap); 793 extern int ata_port_freeze(struct ata_port *ap); 794 795 extern void ata_eh_freeze_port(struct ata_port *ap); 796 extern void ata_eh_thaw_port(struct ata_port *ap); 797 798 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 799 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 800 801 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 802 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 803 ata_postreset_fn_t postreset); 804 805 /* 806 * printk helpers 807 */ 808 #define ata_port_printk(ap, lv, fmt, args...) \ 809 printk(lv"ata%u: "fmt, (ap)->id , ##args) 810 811 #define ata_dev_printk(dev, lv, fmt, args...) \ 812 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args) 813 814 /* 815 * ata_eh_info helpers 816 */ 817 #define ata_ehi_push_desc(ehi, fmt, args...) do { \ 818 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 819 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 820 fmt , ##args); \ 821 } while (0) 822 823 #define ata_ehi_clear_desc(ehi) do { \ 824 (ehi)->desc[0] = '\0'; \ 825 (ehi)->desc_len = 0; \ 826 } while (0) 827 828 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 829 { 830 if (ehi->flags & ATA_EHI_HOTPLUGGED) 831 return; 832 833 ehi->flags |= ATA_EHI_HOTPLUGGED; 834 ehi->hotplug_timestamp = jiffies; 835 836 ehi->err_mask |= AC_ERR_ATA_BUS; 837 ehi->action |= ATA_EH_SOFTRESET; 838 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 839 } 840 841 /* 842 * qc helpers 843 */ 844 static inline int 845 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 846 { 847 if (sg == &qc->pad_sgent) 848 return 1; 849 if (qc->pad_len) 850 return 0; 851 if (((sg - qc->__sg) + 1) == qc->n_elem) 852 return 1; 853 return 0; 854 } 855 856 static inline struct scatterlist * 857 ata_qc_first_sg(struct ata_queued_cmd *qc) 858 { 859 if (qc->n_elem) 860 return qc->__sg; 861 if (qc->pad_len) 862 return &qc->pad_sgent; 863 return NULL; 864 } 865 866 static inline struct scatterlist * 867 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 868 { 869 if (sg == &qc->pad_sgent) 870 return NULL; 871 if (++sg - qc->__sg < qc->n_elem) 872 return sg; 873 if (qc->pad_len) 874 return &qc->pad_sgent; 875 return NULL; 876 } 877 878 #define ata_for_each_sg(sg, qc) \ 879 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 880 881 static inline unsigned int ata_tag_valid(unsigned int tag) 882 { 883 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 884 } 885 886 static inline unsigned int ata_tag_internal(unsigned int tag) 887 { 888 return tag == ATA_MAX_QUEUE - 1; 889 } 890 891 /* 892 * device helpers 893 */ 894 static inline unsigned int ata_class_enabled(unsigned int class) 895 { 896 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 897 } 898 899 static inline unsigned int ata_class_disabled(unsigned int class) 900 { 901 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 902 } 903 904 static inline unsigned int ata_class_absent(unsigned int class) 905 { 906 return !ata_class_enabled(class) && !ata_class_disabled(class); 907 } 908 909 static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 910 { 911 return ata_class_enabled(dev->class); 912 } 913 914 static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 915 { 916 return ata_class_disabled(dev->class); 917 } 918 919 static inline unsigned int ata_dev_absent(const struct ata_device *dev) 920 { 921 return ata_class_absent(dev->class); 922 } 923 924 /* 925 * port helpers 926 */ 927 static inline int ata_port_max_devices(const struct ata_port *ap) 928 { 929 if (ap->flags & ATA_FLAG_SLAVE_POSS) 930 return 2; 931 return 1; 932 } 933 934 935 static inline u8 ata_chk_status(struct ata_port *ap) 936 { 937 return ap->ops->check_status(ap); 938 } 939 940 941 /** 942 * ata_pause - Flush writes and pause 400 nanoseconds. 943 * @ap: Port to wait for. 944 * 945 * LOCKING: 946 * Inherited from caller. 947 */ 948 949 static inline void ata_pause(struct ata_port *ap) 950 { 951 ata_altstatus(ap); 952 ndelay(400); 953 } 954 955 956 /** 957 * ata_busy_wait - Wait for a port status register 958 * @ap: Port to wait for. 959 * 960 * Waits up to max*10 microseconds for the selected bits in the port's 961 * status register to be cleared. 962 * Returns final value of status register. 963 * 964 * LOCKING: 965 * Inherited from caller. 966 */ 967 968 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 969 unsigned int max) 970 { 971 u8 status; 972 973 do { 974 udelay(10); 975 status = ata_chk_status(ap); 976 max--; 977 } while ((status & bits) && (max > 0)); 978 979 return status; 980 } 981 982 983 /** 984 * ata_wait_idle - Wait for a port to be idle. 985 * @ap: Port to wait for. 986 * 987 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 988 * Returns final value of status register. 989 * 990 * LOCKING: 991 * Inherited from caller. 992 */ 993 994 static inline u8 ata_wait_idle(struct ata_port *ap) 995 { 996 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 997 998 if (status & (ATA_BUSY | ATA_DRQ)) { 999 unsigned long l = ap->ioaddr.status_addr; 1000 if (ata_msg_warn(ap)) 1001 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n", 1002 status, l); 1003 } 1004 1005 return status; 1006 } 1007 1008 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 1009 { 1010 qc->tf.ctl |= ATA_NIEN; 1011 } 1012 1013 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1014 unsigned int tag) 1015 { 1016 if (likely(ata_tag_valid(tag))) 1017 return &ap->qcmd[tag]; 1018 return NULL; 1019 } 1020 1021 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1022 unsigned int tag) 1023 { 1024 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1025 1026 if (unlikely(!qc) || !ap->ops->error_handler) 1027 return qc; 1028 1029 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1030 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1031 return qc; 1032 1033 return NULL; 1034 } 1035 1036 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1037 { 1038 memset(tf, 0, sizeof(*tf)); 1039 1040 tf->ctl = dev->ap->ctl; 1041 if (dev->devno == 0) 1042 tf->device = ATA_DEVICE_OBS; 1043 else 1044 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1045 } 1046 1047 static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1048 { 1049 qc->__sg = NULL; 1050 qc->flags = 0; 1051 qc->cursect = qc->cursg = qc->cursg_ofs = 0; 1052 qc->nsect = 0; 1053 qc->nbytes = qc->curbytes = 0; 1054 qc->err_mask = 0; 1055 1056 ata_tf_init(qc->dev, &qc->tf); 1057 1058 /* init result_tf such that it indicates normal completion */ 1059 qc->result_tf.command = ATA_DRDY; 1060 qc->result_tf.feature = 0; 1061 } 1062 1063 /** 1064 * ata_irq_on - Enable interrupts on a port. 1065 * @ap: Port on which interrupts are enabled. 1066 * 1067 * Enable interrupts on a legacy IDE device using MMIO or PIO, 1068 * wait for idle, clear any pending interrupts. 1069 * 1070 * LOCKING: 1071 * Inherited from caller. 1072 */ 1073 1074 static inline u8 ata_irq_on(struct ata_port *ap) 1075 { 1076 struct ata_ioports *ioaddr = &ap->ioaddr; 1077 u8 tmp; 1078 1079 ap->ctl &= ~ATA_NIEN; 1080 ap->last_ctl = ap->ctl; 1081 1082 if (ap->flags & ATA_FLAG_MMIO) 1083 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); 1084 else 1085 outb(ap->ctl, ioaddr->ctl_addr); 1086 tmp = ata_wait_idle(ap); 1087 1088 ap->ops->irq_clear(ap); 1089 1090 return tmp; 1091 } 1092 1093 1094 /** 1095 * ata_irq_ack - Acknowledge a device interrupt. 1096 * @ap: Port on which interrupts are enabled. 1097 * 1098 * Wait up to 10 ms for legacy IDE device to become idle (BUSY 1099 * or BUSY+DRQ clear). Obtain dma status and port status from 1100 * device. Clear the interrupt. Return port status. 1101 * 1102 * LOCKING: 1103 */ 1104 1105 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) 1106 { 1107 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; 1108 u8 host_stat, post_stat, status; 1109 1110 status = ata_busy_wait(ap, bits, 1000); 1111 if (status & bits) 1112 if (ata_msg_err(ap)) 1113 printk(KERN_ERR "abnormal status 0x%X\n", status); 1114 1115 /* get controller status; clear intr, err bits */ 1116 if (ap->flags & ATA_FLAG_MMIO) { 1117 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; 1118 host_stat = readb(mmio + ATA_DMA_STATUS); 1119 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 1120 mmio + ATA_DMA_STATUS); 1121 1122 post_stat = readb(mmio + ATA_DMA_STATUS); 1123 } else { 1124 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1125 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 1126 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1127 1128 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1129 } 1130 1131 if (ata_msg_intr(ap)) 1132 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", 1133 __FUNCTION__, 1134 host_stat, post_stat, status); 1135 1136 return status; 1137 } 1138 1139 static inline int ata_try_flush_cache(const struct ata_device *dev) 1140 { 1141 return ata_id_wcache_enabled(dev->id) || 1142 ata_id_has_flush(dev->id) || 1143 ata_id_has_flush_ext(dev->id); 1144 } 1145 1146 static inline unsigned int ac_err_mask(u8 status) 1147 { 1148 if (status & (ATA_BUSY | ATA_DRQ)) 1149 return AC_ERR_HSM; 1150 if (status & (ATA_ERR | ATA_DF)) 1151 return AC_ERR_DEV; 1152 return 0; 1153 } 1154 1155 static inline unsigned int __ac_err_mask(u8 status) 1156 { 1157 unsigned int mask = ac_err_mask(status); 1158 if (mask == 0) 1159 return AC_ERR_OTHER; 1160 return mask; 1161 } 1162 1163 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1164 { 1165 ap->pad_dma = 0; 1166 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1167 &ap->pad_dma, GFP_KERNEL); 1168 return (ap->pad == NULL) ? -ENOMEM : 0; 1169 } 1170 1171 static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1172 { 1173 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1174 } 1175 1176 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1177 { 1178 return (struct ata_port *) &host->hostdata[0]; 1179 } 1180 1181 #endif /* __LINUX_LIBATA_H__ */ 1182