libata.h revision 720ba12620ee09dce269adf4ad50958adac7bb54
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/io.h> 34#include <linux/ata.h> 35#include <linux/workqueue.h> 36#include <scsi/scsi_host.h> 37 38/* 39 * compile-time options: to be removed as soon as all the drivers are 40 * converted to the new debugging mechanism 41 */ 42#undef ATA_DEBUG /* debugging output */ 43#undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 44#undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 45#undef ATA_NDEBUG /* define to disable quick runtime checks */ 46#undef ATA_ENABLE_PATA /* define to enable PATA support in some 47 * low-level drivers */ 48 49 50/* note: prints function name for you */ 51#ifdef ATA_DEBUG 52#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 53#ifdef ATA_VERBOSE_DEBUG 54#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 55#else 56#define VPRINTK(fmt, args...) 57#endif /* ATA_VERBOSE_DEBUG */ 58#else 59#define DPRINTK(fmt, args...) 60#define VPRINTK(fmt, args...) 61#endif /* ATA_DEBUG */ 62 63#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 64 65/* NEW: debug levels */ 66#define HAVE_LIBATA_MSG 1 67 68enum { 69 ATA_MSG_DRV = 0x0001, 70 ATA_MSG_INFO = 0x0002, 71 ATA_MSG_PROBE = 0x0004, 72 ATA_MSG_WARN = 0x0008, 73 ATA_MSG_MALLOC = 0x0010, 74 ATA_MSG_CTL = 0x0020, 75 ATA_MSG_INTR = 0x0040, 76 ATA_MSG_ERR = 0x0080, 77}; 78 79#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) 80#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) 81#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) 82#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) 83#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) 84#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) 85#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) 86#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) 87 88static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) 89{ 90 if (dval < 0 || dval >= (sizeof(u32) * 8)) 91 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ 92 if (!dval) 93 return 0; 94 return (1 << dval) - 1; 95} 96 97/* defines only for the constants which don't work well as enums */ 98#define ATA_TAG_POISON 0xfafbfcfdU 99 100/* move to PCI layer? */ 101static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) 102{ 103 return &pdev->dev; 104} 105 106enum { 107 /* various global constants */ 108 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 109 ATA_MAX_PORTS = 8, 110 ATA_DEF_QUEUE = 1, 111 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ 112 ATA_MAX_QUEUE = 32, 113 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, 114 ATA_MAX_SECTORS = 200, /* FIXME */ 115 ATA_MAX_SECTORS_LBA48 = 65535, 116 ATA_MAX_BUS = 2, 117 ATA_DEF_BUSY_WAIT = 10000, 118 ATA_SHORT_PAUSE = (HZ >> 6) + 1, 119 120 ATA_SHT_EMULATED = 1, 121 ATA_SHT_CMD_PER_LUN = 1, 122 ATA_SHT_THIS_ID = -1, 123 ATA_SHT_USE_CLUSTERING = 1, 124 125 /* struct ata_device stuff */ 126 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ 127 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ 128 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ 129 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ 130 ATA_DFLAG_CFG_MASK = (1 << 8) - 1, 131 132 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */ 133 ATA_DFLAG_INIT_MASK = (1 << 16) - 1, 134 135 ATA_DFLAG_DETACH = (1 << 16), 136 ATA_DFLAG_DETACHED = (1 << 17), 137 138 ATA_DEV_UNKNOWN = 0, /* unknown device */ 139 ATA_DEV_ATA = 1, /* ATA device */ 140 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 141 ATA_DEV_ATAPI = 3, /* ATAPI device */ 142 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 143 ATA_DEV_NONE = 5, /* no device */ 144 145 /* struct ata_port flags */ 146 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 147 /* (doesn't imply presence) */ 148 ATA_FLAG_SATA = (1 << 1), 149 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ 150 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ 151 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ 152 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ 153 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ 154 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ 155 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ 156 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD 157 * doesn't handle PIO interrupts */ 158 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ 159 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */ 160 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H 161 * Register FIS clearing BSY */ 162 163 ATA_FLAG_DEBUGMSG = (1 << 13), 164 ATA_FLAG_FLUSH_PORT_TASK = (1 << 14), /* flush port task */ 165 166 ATA_FLAG_EH_PENDING = (1 << 15), /* EH pending */ 167 ATA_FLAG_EH_IN_PROGRESS = (1 << 16), /* EH in progress */ 168 ATA_FLAG_FROZEN = (1 << 17), /* port is frozen */ 169 ATA_FLAG_RECOVERED = (1 << 18), /* recovery action performed */ 170 ATA_FLAG_LOADING = (1 << 19), /* boot/loading probe */ 171 ATA_FLAG_UNLOADING = (1 << 20), /* module is unloading */ 172 ATA_FLAG_SCSI_HOTPLUG = (1 << 21), /* SCSI hotplug scheduled */ 173 174 ATA_FLAG_DISABLED = (1 << 22), /* port is disabled, ignore it */ 175 ATA_FLAG_SUSPENDED = (1 << 23), /* port is suspended (power) */ 176 177 /* bits 24:31 of ap->flags are reserved for LLDD specific flags */ 178 179 /* struct ata_queued_cmd flags */ 180 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ 181 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ 182 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ 183 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 184 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ 185 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ 186 187 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ 188 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ 189 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ 190 191 /* host set flags */ 192 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */ 193 194 /* various lengths of time */ 195 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ 196 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ 197 ATA_TMOUT_INTERNAL = 30 * HZ, 198 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, 199 200 /* ATA bus states */ 201 BUS_UNKNOWN = 0, 202 BUS_DMA = 1, 203 BUS_IDLE = 2, 204 BUS_NOINTR = 3, 205 BUS_NODATA = 4, 206 BUS_TIMER = 5, 207 BUS_PIO = 6, 208 BUS_EDD = 7, 209 BUS_IDENTIFY = 8, 210 BUS_PACKET = 9, 211 212 /* SATA port states */ 213 PORT_UNKNOWN = 0, 214 PORT_ENABLED = 1, 215 PORT_DISABLED = 2, 216 217 /* encoding various smaller bitmaps into a single 218 * unsigned int bitmap 219 */ 220 ATA_BITS_PIO = 5, 221 ATA_BITS_MWDMA = 3, 222 ATA_BITS_UDMA = 8, 223 224 ATA_SHIFT_PIO = 0, 225 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, 226 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, 227 228 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, 229 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, 230 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, 231 232 /* size of buffer to pad xfers ending on unaligned boundaries */ 233 ATA_DMA_PAD_SZ = 4, 234 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 235 236 /* masks for port functions */ 237 ATA_PORT_PRIMARY = (1 << 0), 238 ATA_PORT_SECONDARY = (1 << 1), 239 240 /* ering size */ 241 ATA_ERING_SIZE = 32, 242 243 /* desc_len for ata_eh_info and context */ 244 ATA_EH_DESC_LEN = 80, 245 246 /* reset / recovery action types */ 247 ATA_EH_REVALIDATE = (1 << 0), 248 ATA_EH_SOFTRESET = (1 << 1), 249 ATA_EH_HARDRESET = (1 << 2), 250 251 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, 252 253 /* ata_eh_info->flags */ 254 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ 255 256 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */ 257 258 /* max repeat if error condition is still set after ->error_handler */ 259 ATA_EH_MAX_REPEAT = 5, 260 261 /* how hard are we gonna try to probe/recover devices */ 262 ATA_PROBE_MAX_TRIES = 3, 263 ATA_EH_RESET_TRIES = 3, 264 ATA_EH_DEV_TRIES = 3, 265 266 /* Drive spinup time (time from power-on to the first D2H FIS) 267 * in msecs - 8s currently. Failing to get ready in this time 268 * isn't critical. It will result in reset failure for 269 * controllers which can't wait for the first D2H FIS. libata 270 * will retry, so it just has to be long enough to spin up 271 * most devices. 272 */ 273 ATA_SPINUP_WAIT = 8000, 274}; 275 276enum hsm_task_states { 277 HSM_ST_UNKNOWN, /* state unknown */ 278 HSM_ST_IDLE, /* no command on going */ 279 HSM_ST, /* (waiting the device to) transfer data */ 280 HSM_ST_LAST, /* (waiting the device to) complete command */ 281 HSM_ST_ERR, /* error */ 282 HSM_ST_FIRST, /* (waiting the device to) 283 write CDB or first data block */ 284}; 285 286enum ata_completion_errors { 287 AC_ERR_DEV = (1 << 0), /* device reported error */ 288 AC_ERR_HSM = (1 << 1), /* host state machine violation */ 289 AC_ERR_TIMEOUT = (1 << 2), /* timeout */ 290 AC_ERR_MEDIA = (1 << 3), /* media error */ 291 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ 292 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ 293 AC_ERR_SYSTEM = (1 << 6), /* system error */ 294 AC_ERR_INVALID = (1 << 7), /* invalid argument */ 295 AC_ERR_OTHER = (1 << 8), /* unknown */ 296}; 297 298/* forward declarations */ 299struct scsi_device; 300struct ata_port_operations; 301struct ata_port; 302struct ata_queued_cmd; 303 304/* typedefs */ 305typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); 306typedef void (*ata_probeinit_fn_t)(struct ata_port *ap); 307typedef int (*ata_prereset_fn_t)(struct ata_port *ap); 308typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes); 309typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes); 310 311struct ata_ioports { 312 unsigned long cmd_addr; 313 unsigned long data_addr; 314 unsigned long error_addr; 315 unsigned long feature_addr; 316 unsigned long nsect_addr; 317 unsigned long lbal_addr; 318 unsigned long lbam_addr; 319 unsigned long lbah_addr; 320 unsigned long device_addr; 321 unsigned long status_addr; 322 unsigned long command_addr; 323 unsigned long altstatus_addr; 324 unsigned long ctl_addr; 325 unsigned long bmdma_addr; 326 unsigned long scr_addr; 327}; 328 329struct ata_probe_ent { 330 struct list_head node; 331 struct device *dev; 332 const struct ata_port_operations *port_ops; 333 struct scsi_host_template *sht; 334 struct ata_ioports port[ATA_MAX_PORTS]; 335 unsigned int n_ports; 336 unsigned int hard_port_no; 337 unsigned int pio_mask; 338 unsigned int mwdma_mask; 339 unsigned int udma_mask; 340 unsigned int legacy_mode; 341 unsigned long irq; 342 unsigned int irq_flags; 343 unsigned long host_flags; 344 unsigned long host_set_flags; 345 void __iomem *mmio_base; 346 void *private_data; 347}; 348 349struct ata_host_set { 350 spinlock_t lock; 351 struct device *dev; 352 unsigned long irq; 353 void __iomem *mmio_base; 354 unsigned int n_ports; 355 void *private_data; 356 const struct ata_port_operations *ops; 357 unsigned long flags; 358 int simplex_claimed; /* Keep seperate in case we 359 ever need to do this locked */ 360 struct ata_port * ports[0]; 361}; 362 363struct ata_queued_cmd { 364 struct ata_port *ap; 365 struct ata_device *dev; 366 367 struct scsi_cmnd *scsicmd; 368 void (*scsidone)(struct scsi_cmnd *); 369 370 struct ata_taskfile tf; 371 u8 cdb[ATAPI_CDB_LEN]; 372 373 unsigned long flags; /* ATA_QCFLAG_xxx */ 374 unsigned int tag; 375 unsigned int n_elem; 376 unsigned int orig_n_elem; 377 378 int dma_dir; 379 380 unsigned int pad_len; 381 382 unsigned int nsect; 383 unsigned int cursect; 384 385 unsigned int nbytes; 386 unsigned int curbytes; 387 388 unsigned int cursg; 389 unsigned int cursg_ofs; 390 391 struct scatterlist sgent; 392 struct scatterlist pad_sgent; 393 void *buf_virt; 394 395 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ 396 struct scatterlist *__sg; 397 398 unsigned int err_mask; 399 struct ata_taskfile result_tf; 400 ata_qc_cb_t complete_fn; 401 402 void *private_data; 403}; 404 405struct ata_host_stats { 406 unsigned long unhandled_irq; 407 unsigned long idle_irq; 408 unsigned long rw_reqbuf; 409}; 410 411struct ata_ering_entry { 412 int is_io; 413 unsigned int err_mask; 414 u64 timestamp; 415}; 416 417struct ata_ering { 418 int cursor; 419 struct ata_ering_entry ring[ATA_ERING_SIZE]; 420}; 421 422struct ata_device { 423 struct ata_port *ap; 424 unsigned int devno; /* 0 or 1 */ 425 unsigned long flags; /* ATA_DFLAG_xxx */ 426 struct scsi_device *sdev; /* attached SCSI device */ 427 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ 428 u64 n_sectors; /* size of device, if ATA */ 429 unsigned int class; /* ATA_DEV_xxx */ 430 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 431 u8 pio_mode; 432 u8 dma_mode; 433 u8 xfer_mode; 434 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 435 436 unsigned int multi_count; /* sectors count for 437 READ/WRITE MULTIPLE */ 438 unsigned int max_sectors; /* per-device max sectors */ 439 unsigned int cdb_len; 440 441 /* per-dev xfer mask */ 442 unsigned int pio_mask; 443 unsigned int mwdma_mask; 444 unsigned int udma_mask; 445 446 /* for CHS addressing */ 447 u16 cylinders; /* Number of cylinders */ 448 u16 heads; /* Number of heads */ 449 u16 sectors; /* Number of sectors per track */ 450 451 /* error history */ 452 struct ata_ering ering; 453}; 454 455/* Offset into struct ata_device. Fields above it are maintained 456 * acress device init. Fields below are zeroed. 457 */ 458#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) 459 460struct ata_eh_info { 461 struct ata_device *dev; /* offending device */ 462 u32 serror; /* SError from LLDD */ 463 unsigned int err_mask; /* port-wide err_mask */ 464 unsigned int action; /* ATA_EH_* action mask */ 465 unsigned int flags; /* ATA_EHI_* flags */ 466 467 unsigned long hotplug_timestamp; 468 unsigned int probe_mask; 469 470 char desc[ATA_EH_DESC_LEN]; 471 int desc_len; 472}; 473 474struct ata_eh_context { 475 struct ata_eh_info i; 476 int tries[ATA_MAX_DEVICES]; 477 unsigned int classes[ATA_MAX_DEVICES]; 478 unsigned int did_probe_mask; 479}; 480 481struct ata_port { 482 struct Scsi_Host *host; /* our co-allocated scsi host */ 483 const struct ata_port_operations *ops; 484 unsigned long flags; /* ATA_FLAG_xxx */ 485 unsigned int id; /* unique id req'd by scsi midlyr */ 486 unsigned int port_no; /* unique port #; from zero */ 487 unsigned int hard_port_no; /* hardware port #; from zero */ 488 489 struct ata_prd *prd; /* our SG list */ 490 dma_addr_t prd_dma; /* and its DMA mapping */ 491 492 void *pad; /* array of DMA pad buffers */ 493 dma_addr_t pad_dma; 494 495 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 496 497 u8 ctl; /* cache of ATA control register */ 498 u8 last_ctl; /* Cache last written value */ 499 unsigned int pio_mask; 500 unsigned int mwdma_mask; 501 unsigned int udma_mask; 502 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 503 unsigned int hw_sata_spd_limit; 504 unsigned int sata_spd_limit; /* SATA PHY speed limit */ 505 506 /* record runtime error info, protected by host_set lock */ 507 struct ata_eh_info eh_info; 508 /* EH context owned by EH */ 509 struct ata_eh_context eh_context; 510 511 struct ata_device device[ATA_MAX_DEVICES]; 512 513 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 514 unsigned long qc_allocated; 515 unsigned int qc_active; 516 517 unsigned int active_tag; 518 u32 sactive; 519 520 struct ata_host_stats stats; 521 struct ata_host_set *host_set; 522 struct device *dev; 523 524 struct work_struct port_task, hotplug_task; 525 526 unsigned int hsm_task_state; 527 528 u32 msg_enable; 529 struct list_head eh_done_q; 530 wait_queue_head_t eh_wait_q; 531 532 void *private_data; 533 534 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ 535}; 536 537struct ata_port_operations { 538 void (*port_disable) (struct ata_port *); 539 540 void (*dev_config) (struct ata_port *, struct ata_device *); 541 542 void (*set_piomode) (struct ata_port *, struct ata_device *); 543 void (*set_dmamode) (struct ata_port *, struct ata_device *); 544 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long); 545 546 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 547 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 548 549 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 550 u8 (*check_status)(struct ata_port *ap); 551 u8 (*check_altstatus)(struct ata_port *ap); 552 void (*dev_select)(struct ata_port *ap, unsigned int device); 553 554 void (*phy_reset) (struct ata_port *ap); /* obsolete */ 555 void (*set_mode) (struct ata_port *ap); 556 int (*probe_reset) (struct ata_port *ap, unsigned int *classes); 557 558 void (*post_set_mode) (struct ata_port *ap); 559 560 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 561 562 void (*bmdma_setup) (struct ata_queued_cmd *qc); 563 void (*bmdma_start) (struct ata_queued_cmd *qc); 564 565 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); 566 567 void (*qc_prep) (struct ata_queued_cmd *qc); 568 unsigned int (*qc_issue) (struct ata_queued_cmd *qc); 569 570 /* Error handlers. ->error_handler overrides ->eng_timeout and 571 * indicates that new-style EH is in place. 572 */ 573 void (*eng_timeout) (struct ata_port *ap); /* obsolete */ 574 575 void (*freeze) (struct ata_port *ap); 576 void (*thaw) (struct ata_port *ap); 577 void (*error_handler) (struct ata_port *ap); 578 void (*post_internal_cmd) (struct ata_queued_cmd *qc); 579 580 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); 581 void (*irq_clear) (struct ata_port *); 582 583 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 584 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 585 u32 val); 586 587 int (*port_start) (struct ata_port *ap); 588 void (*port_stop) (struct ata_port *ap); 589 590 void (*host_stop) (struct ata_host_set *host_set); 591 592 void (*bmdma_stop) (struct ata_queued_cmd *qc); 593 u8 (*bmdma_status) (struct ata_port *ap); 594}; 595 596struct ata_port_info { 597 struct scsi_host_template *sht; 598 unsigned long host_flags; 599 unsigned long pio_mask; 600 unsigned long mwdma_mask; 601 unsigned long udma_mask; 602 const struct ata_port_operations *port_ops; 603 void *private_data; 604}; 605 606struct ata_timing { 607 unsigned short mode; /* ATA mode */ 608 unsigned short setup; /* t1 */ 609 unsigned short act8b; /* t2 for 8-bit I/O */ 610 unsigned short rec8b; /* t2i for 8-bit I/O */ 611 unsigned short cyc8b; /* t0 for 8-bit I/O */ 612 unsigned short active; /* t2 or tD */ 613 unsigned short recover; /* t2i or tK */ 614 unsigned short cycle; /* t0 */ 615 unsigned short udma; /* t2CYCTYP/2 */ 616}; 617 618#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 619 620extern const unsigned long sata_deb_timing_boot[]; 621extern const unsigned long sata_deb_timing_eh[]; 622extern const unsigned long sata_deb_timing_before_fsrst[]; 623 624extern void ata_port_probe(struct ata_port *); 625extern void __sata_phy_reset(struct ata_port *ap); 626extern void sata_phy_reset(struct ata_port *ap); 627extern void ata_bus_reset(struct ata_port *ap); 628extern int sata_set_spd(struct ata_port *ap); 629extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param); 630extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param); 631extern int ata_drive_probe_reset(struct ata_port *ap, 632 ata_probeinit_fn_t probeinit, 633 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 634 ata_postreset_fn_t postreset, unsigned int *classes); 635extern void ata_std_probeinit(struct ata_port *ap); 636extern int ata_std_prereset(struct ata_port *ap); 637extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); 638extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); 639extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); 640extern int ata_dev_revalidate(struct ata_device *dev, int post_reset); 641extern void ata_port_disable(struct ata_port *); 642extern void ata_std_ports(struct ata_ioports *ioaddr); 643#ifdef CONFIG_PCI 644extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 645 unsigned int n_ports); 646extern void ata_pci_remove_one (struct pci_dev *pdev); 647extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state); 648extern int ata_pci_device_resume(struct pci_dev *pdev); 649extern int ata_pci_clear_simplex(struct pci_dev *pdev); 650#endif /* CONFIG_PCI */ 651extern int ata_device_add(const struct ata_probe_ent *ent); 652extern void ata_port_detach(struct ata_port *ap); 653extern void ata_host_set_remove(struct ata_host_set *host_set); 654extern int ata_scsi_detect(struct scsi_host_template *sht); 655extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 656extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 657extern int ata_scsi_release(struct Scsi_Host *host); 658extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 659extern int sata_scr_valid(struct ata_port *ap); 660extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); 661extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); 662extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); 663extern int ata_port_online(struct ata_port *ap); 664extern int ata_port_offline(struct ata_port *ap); 665extern int ata_scsi_device_resume(struct scsi_device *); 666extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state); 667extern int ata_device_resume(struct ata_device *); 668extern int ata_device_suspend(struct ata_device *, pm_message_t state); 669extern int ata_ratelimit(void); 670extern unsigned int ata_busy_sleep(struct ata_port *ap, 671 unsigned long timeout_pat, 672 unsigned long timeout); 673extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), 674 void *data, unsigned long delay); 675extern 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 */ 682extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 683extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 684extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 685extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 686extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 687extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 688extern u8 ata_check_status(struct ata_port *ap); 689extern u8 ata_altstatus(struct ata_port *ap); 690extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 691extern int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes); 692extern int ata_port_start (struct ata_port *ap); 693extern void ata_port_stop (struct ata_port *ap); 694extern void ata_host_stop (struct ata_host_set *host_set); 695extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); 696extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf, 697 unsigned int buflen, int write_data); 698extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf, 699 unsigned int buflen, int write_data); 700extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, 701 unsigned int buflen, int write_data); 702extern void ata_qc_prep(struct ata_queued_cmd *qc); 703extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); 704extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); 705extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 706 unsigned int buflen); 707extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 708 unsigned int n_elem); 709extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 710extern void ata_id_string(const u16 *id, unsigned char *s, 711 unsigned int ofs, unsigned int len); 712extern void ata_id_c_string(const u16 *id, unsigned char *s, 713 unsigned int ofs, unsigned int len); 714extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 715extern void ata_bmdma_start (struct ata_queued_cmd *qc); 716extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 717extern u8 ata_bmdma_status(struct ata_port *ap); 718extern void ata_bmdma_irq_clear(struct ata_port *ap); 719extern void ata_bmdma_freeze(struct ata_port *ap); 720extern void ata_bmdma_thaw(struct ata_port *ap); 721extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 722 ata_reset_fn_t softreset, 723 ata_reset_fn_t hardreset, 724 ata_postreset_fn_t postreset); 725extern void ata_bmdma_error_handler(struct ata_port *ap); 726extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); 727extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, 728 u8 status, int in_wq); 729extern void ata_qc_complete(struct ata_queued_cmd *qc); 730extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, 731 void (*finish_qc)(struct ata_queued_cmd *)); 732extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, 733 void (*done)(struct scsi_cmnd *)); 734extern int ata_std_bios_param(struct scsi_device *sdev, 735 struct block_device *bdev, 736 sector_t capacity, int geom[]); 737extern int ata_scsi_slave_config(struct scsi_device *sdev); 738extern void ata_scsi_slave_destroy(struct scsi_device *sdev); 739extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, 740 int queue_depth); 741extern struct ata_device *ata_dev_pair(struct ata_device *adev); 742 743/* 744 * Timing helpers 745 */ 746 747extern unsigned int ata_pio_need_iordy(const struct ata_device *); 748extern int ata_timing_compute(struct ata_device *, unsigned short, 749 struct ata_timing *, int, int); 750extern void ata_timing_merge(const struct ata_timing *, 751 const struct ata_timing *, struct ata_timing *, 752 unsigned int); 753 754enum { 755 ATA_TIMING_SETUP = (1 << 0), 756 ATA_TIMING_ACT8B = (1 << 1), 757 ATA_TIMING_REC8B = (1 << 2), 758 ATA_TIMING_CYC8B = (1 << 3), 759 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 760 ATA_TIMING_CYC8B, 761 ATA_TIMING_ACTIVE = (1 << 4), 762 ATA_TIMING_RECOVER = (1 << 5), 763 ATA_TIMING_CYCLE = (1 << 6), 764 ATA_TIMING_UDMA = (1 << 7), 765 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 766 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 767 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 768 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 769}; 770 771 772#ifdef CONFIG_PCI 773struct pci_bits { 774 unsigned int reg; /* PCI config register to read */ 775 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 776 unsigned long mask; 777 unsigned long val; 778}; 779 780extern void ata_pci_host_stop (struct ata_host_set *host_set); 781extern struct ata_probe_ent * 782ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); 783extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 784extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long); 785#endif /* CONFIG_PCI */ 786 787/* 788 * EH 789 */ 790extern void ata_eng_timeout(struct ata_port *ap); 791 792extern void ata_port_schedule_eh(struct ata_port *ap); 793extern int ata_port_abort(struct ata_port *ap); 794extern int ata_port_freeze(struct ata_port *ap); 795 796extern void ata_eh_freeze_port(struct ata_port *ap); 797extern void ata_eh_thaw_port(struct ata_port *ap); 798 799extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); 800extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); 801 802extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, 803 ata_reset_fn_t softreset, ata_reset_fn_t hardreset, 804 ata_postreset_fn_t postreset); 805 806/* 807 * printk helpers 808 */ 809#define ata_port_printk(ap, lv, fmt, args...) \ 810 printk(lv"ata%u: "fmt, (ap)->id , ##args) 811 812#define ata_dev_printk(dev, lv, fmt, args...) \ 813 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args) 814 815/* 816 * ata_eh_info helpers 817 */ 818#define ata_ehi_push_desc(ehi, fmt, args...) do { \ 819 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \ 820 ATA_EH_DESC_LEN - (ehi)->desc_len, \ 821 fmt , ##args); \ 822} while (0) 823 824#define ata_ehi_clear_desc(ehi) do { \ 825 (ehi)->desc[0] = '\0'; \ 826 (ehi)->desc_len = 0; \ 827} while (0) 828 829static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) 830{ 831 if (ehi->flags & ATA_EHI_HOTPLUGGED) 832 return; 833 834 ehi->flags |= ATA_EHI_HOTPLUGGED; 835 ehi->hotplug_timestamp = jiffies; 836 837 ehi->err_mask |= AC_ERR_ATA_BUS; 838 ehi->action |= ATA_EH_SOFTRESET; 839 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; 840} 841 842/* 843 * qc helpers 844 */ 845static inline int 846ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) 847{ 848 if (sg == &qc->pad_sgent) 849 return 1; 850 if (qc->pad_len) 851 return 0; 852 if (((sg - qc->__sg) + 1) == qc->n_elem) 853 return 1; 854 return 0; 855} 856 857static inline struct scatterlist * 858ata_qc_first_sg(struct ata_queued_cmd *qc) 859{ 860 if (qc->n_elem) 861 return qc->__sg; 862 if (qc->pad_len) 863 return &qc->pad_sgent; 864 return NULL; 865} 866 867static inline struct scatterlist * 868ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) 869{ 870 if (sg == &qc->pad_sgent) 871 return NULL; 872 if (++sg - qc->__sg < qc->n_elem) 873 return sg; 874 if (qc->pad_len) 875 return &qc->pad_sgent; 876 return NULL; 877} 878 879#define ata_for_each_sg(sg, qc) \ 880 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) 881 882static inline unsigned int ata_tag_valid(unsigned int tag) 883{ 884 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 885} 886 887static inline unsigned int ata_tag_internal(unsigned int tag) 888{ 889 return tag == ATA_MAX_QUEUE - 1; 890} 891 892static inline unsigned int ata_class_enabled(unsigned int class) 893{ 894 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; 895} 896 897static inline unsigned int ata_class_disabled(unsigned int class) 898{ 899 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; 900} 901 902static inline unsigned int ata_class_absent(unsigned int class) 903{ 904 return !ata_class_enabled(class) && !ata_class_disabled(class); 905} 906 907static inline unsigned int ata_dev_enabled(const struct ata_device *dev) 908{ 909 return ata_class_enabled(dev->class); 910} 911 912static inline unsigned int ata_dev_disabled(const struct ata_device *dev) 913{ 914 return ata_class_disabled(dev->class); 915} 916 917static inline unsigned int ata_dev_absent(const struct ata_device *dev) 918{ 919 return ata_class_absent(dev->class); 920} 921 922static inline u8 ata_chk_status(struct ata_port *ap) 923{ 924 return ap->ops->check_status(ap); 925} 926 927 928/** 929 * ata_pause - Flush writes and pause 400 nanoseconds. 930 * @ap: Port to wait for. 931 * 932 * LOCKING: 933 * Inherited from caller. 934 */ 935 936static inline void ata_pause(struct ata_port *ap) 937{ 938 ata_altstatus(ap); 939 ndelay(400); 940} 941 942 943/** 944 * ata_busy_wait - Wait for a port status register 945 * @ap: Port to wait for. 946 * 947 * Waits up to max*10 microseconds for the selected bits in the port's 948 * status register to be cleared. 949 * Returns final value of status register. 950 * 951 * LOCKING: 952 * Inherited from caller. 953 */ 954 955static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 956 unsigned int max) 957{ 958 u8 status; 959 960 do { 961 udelay(10); 962 status = ata_chk_status(ap); 963 max--; 964 } while ((status & bits) && (max > 0)); 965 966 return status; 967} 968 969 970/** 971 * ata_wait_idle - Wait for a port to be idle. 972 * @ap: Port to wait for. 973 * 974 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 975 * Returns final value of status register. 976 * 977 * LOCKING: 978 * Inherited from caller. 979 */ 980 981static inline u8 ata_wait_idle(struct ata_port *ap) 982{ 983 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 984 985 if (status & (ATA_BUSY | ATA_DRQ)) { 986 unsigned long l = ap->ioaddr.status_addr; 987 if (ata_msg_warn(ap)) 988 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n", 989 status, l); 990 } 991 992 return status; 993} 994 995static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 996{ 997 qc->tf.ctl |= ATA_NIEN; 998} 999 1000static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, 1001 unsigned int tag) 1002{ 1003 if (likely(ata_tag_valid(tag))) 1004 return &ap->qcmd[tag]; 1005 return NULL; 1006} 1007 1008static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, 1009 unsigned int tag) 1010{ 1011 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); 1012 1013 if (unlikely(!qc) || !ap->ops->error_handler) 1014 return qc; 1015 1016 if ((qc->flags & (ATA_QCFLAG_ACTIVE | 1017 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) 1018 return qc; 1019 1020 return NULL; 1021} 1022 1023static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) 1024{ 1025 memset(tf, 0, sizeof(*tf)); 1026 1027 tf->ctl = dev->ap->ctl; 1028 if (dev->devno == 0) 1029 tf->device = ATA_DEVICE_OBS; 1030 else 1031 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 1032} 1033 1034static inline void ata_qc_reinit(struct ata_queued_cmd *qc) 1035{ 1036 qc->__sg = NULL; 1037 qc->flags = 0; 1038 qc->cursect = qc->cursg = qc->cursg_ofs = 0; 1039 qc->nsect = 0; 1040 qc->nbytes = qc->curbytes = 0; 1041 qc->err_mask = 0; 1042 1043 ata_tf_init(qc->dev, &qc->tf); 1044 1045 /* init result_tf such that it indicates normal completion */ 1046 qc->result_tf.command = ATA_DRDY; 1047 qc->result_tf.feature = 0; 1048} 1049 1050/** 1051 * ata_irq_on - Enable interrupts on a port. 1052 * @ap: Port on which interrupts are enabled. 1053 * 1054 * Enable interrupts on a legacy IDE device using MMIO or PIO, 1055 * wait for idle, clear any pending interrupts. 1056 * 1057 * LOCKING: 1058 * Inherited from caller. 1059 */ 1060 1061static inline u8 ata_irq_on(struct ata_port *ap) 1062{ 1063 struct ata_ioports *ioaddr = &ap->ioaddr; 1064 u8 tmp; 1065 1066 ap->ctl &= ~ATA_NIEN; 1067 ap->last_ctl = ap->ctl; 1068 1069 if (ap->flags & ATA_FLAG_MMIO) 1070 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); 1071 else 1072 outb(ap->ctl, ioaddr->ctl_addr); 1073 tmp = ata_wait_idle(ap); 1074 1075 ap->ops->irq_clear(ap); 1076 1077 return tmp; 1078} 1079 1080 1081/** 1082 * ata_irq_ack - Acknowledge a device interrupt. 1083 * @ap: Port on which interrupts are enabled. 1084 * 1085 * Wait up to 10 ms for legacy IDE device to become idle (BUSY 1086 * or BUSY+DRQ clear). Obtain dma status and port status from 1087 * device. Clear the interrupt. Return port status. 1088 * 1089 * LOCKING: 1090 */ 1091 1092static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) 1093{ 1094 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; 1095 u8 host_stat, post_stat, status; 1096 1097 status = ata_busy_wait(ap, bits, 1000); 1098 if (status & bits) 1099 if (ata_msg_err(ap)) 1100 printk(KERN_ERR "abnormal status 0x%X\n", status); 1101 1102 /* get controller status; clear intr, err bits */ 1103 if (ap->flags & ATA_FLAG_MMIO) { 1104 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; 1105 host_stat = readb(mmio + ATA_DMA_STATUS); 1106 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 1107 mmio + ATA_DMA_STATUS); 1108 1109 post_stat = readb(mmio + ATA_DMA_STATUS); 1110 } else { 1111 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1112 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 1113 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1114 1115 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 1116 } 1117 1118 if (ata_msg_intr(ap)) 1119 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", 1120 __FUNCTION__, 1121 host_stat, post_stat, status); 1122 1123 return status; 1124} 1125 1126static inline int ata_try_flush_cache(const struct ata_device *dev) 1127{ 1128 return ata_id_wcache_enabled(dev->id) || 1129 ata_id_has_flush(dev->id) || 1130 ata_id_has_flush_ext(dev->id); 1131} 1132 1133static inline unsigned int ac_err_mask(u8 status) 1134{ 1135 if (status & (ATA_BUSY | ATA_DRQ)) 1136 return AC_ERR_HSM; 1137 if (status & (ATA_ERR | ATA_DF)) 1138 return AC_ERR_DEV; 1139 return 0; 1140} 1141 1142static inline unsigned int __ac_err_mask(u8 status) 1143{ 1144 unsigned int mask = ac_err_mask(status); 1145 if (mask == 0) 1146 return AC_ERR_OTHER; 1147 return mask; 1148} 1149 1150static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) 1151{ 1152 ap->pad_dma = 0; 1153 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, 1154 &ap->pad_dma, GFP_KERNEL); 1155 return (ap->pad == NULL) ? -ENOMEM : 0; 1156} 1157 1158static inline void ata_pad_free(struct ata_port *ap, struct device *dev) 1159{ 1160 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); 1161} 1162 1163static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) 1164{ 1165 return (struct ata_port *) &host->hostdata[0]; 1166} 1167 1168#endif /* __LINUX_LIBATA_H__ */ 1169