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 <asm/io.h> 33 #include <linux/ata.h> 34 #include <linux/workqueue.h> 35 36 /* 37 * compile-time options 38 */ 39 #undef ATA_DEBUG /* debugging output */ 40 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ 41 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ 42 #undef ATA_NDEBUG /* define to disable quick runtime checks */ 43 #undef ATA_ENABLE_PATA /* define to enable PATA support in some 44 * low-level drivers */ 45 #undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */ 46 47 48 /* note: prints function name for you */ 49 #ifdef ATA_DEBUG 50 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 51 #ifdef ATA_VERBOSE_DEBUG 52 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) 53 #else 54 #define VPRINTK(fmt, args...) 55 #endif /* ATA_VERBOSE_DEBUG */ 56 #else 57 #define DPRINTK(fmt, args...) 58 #define VPRINTK(fmt, args...) 59 #endif /* ATA_DEBUG */ 60 61 #ifdef ATA_NDEBUG 62 #define assert(expr) 63 #else 64 #define assert(expr) \ 65 if(unlikely(!(expr))) { \ 66 printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \ 67 #expr,__FILE__,__FUNCTION__,__LINE__); \ 68 } 69 #endif 70 71 /* defines only for the constants which don't work well as enums */ 72 #define ATA_TAG_POISON 0xfafbfcfdU 73 74 /* move to PCI layer? */ 75 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) 76 { 77 return &pdev->dev; 78 } 79 80 enum { 81 /* various global constants */ 82 LIBATA_MAX_PRD = ATA_MAX_PRD / 2, 83 ATA_MAX_PORTS = 8, 84 ATA_DEF_QUEUE = 1, 85 ATA_MAX_QUEUE = 1, 86 ATA_MAX_SECTORS = 200, /* FIXME */ 87 ATA_MAX_BUS = 2, 88 ATA_DEF_BUSY_WAIT = 10000, 89 ATA_SHORT_PAUSE = (HZ >> 6) + 1, 90 91 ATA_SHT_EMULATED = 1, 92 ATA_SHT_CMD_PER_LUN = 1, 93 ATA_SHT_THIS_ID = -1, 94 ATA_SHT_USE_CLUSTERING = 1, 95 96 /* struct ata_device stuff */ 97 ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */ 98 ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */ 99 ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */ 100 ATA_DFLAG_LBA = (1 << 3), /* device supports LBA */ 101 102 ATA_DEV_UNKNOWN = 0, /* unknown device */ 103 ATA_DEV_ATA = 1, /* ATA device */ 104 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 105 ATA_DEV_ATAPI = 3, /* ATAPI device */ 106 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 107 ATA_DEV_NONE = 5, /* no device */ 108 109 /* struct ata_port flags */ 110 ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */ 111 /* (doesn't imply presence) */ 112 ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */ 113 ATA_FLAG_SATA = (1 << 3), 114 ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */ 115 ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */ 116 ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */ 117 ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */ 118 ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */ 119 ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once 120 * proper HSM is in place. */ 121 122 ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */ 123 ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */ 124 ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */ 125 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 126 127 /* various lengths of time */ 128 ATA_TMOUT_EDD = 5 * HZ, /* hueristic */ 129 ATA_TMOUT_PIO = 30 * HZ, 130 ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */ 131 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */ 132 ATA_TMOUT_CDB = 30 * HZ, 133 ATA_TMOUT_CDB_QUICK = 5 * HZ, 134 135 /* ATA bus states */ 136 BUS_UNKNOWN = 0, 137 BUS_DMA = 1, 138 BUS_IDLE = 2, 139 BUS_NOINTR = 3, 140 BUS_NODATA = 4, 141 BUS_TIMER = 5, 142 BUS_PIO = 6, 143 BUS_EDD = 7, 144 BUS_IDENTIFY = 8, 145 BUS_PACKET = 9, 146 147 /* SATA port states */ 148 PORT_UNKNOWN = 0, 149 PORT_ENABLED = 1, 150 PORT_DISABLED = 2, 151 152 /* encoding various smaller bitmaps into a single 153 * unsigned long bitmap 154 */ 155 ATA_SHIFT_UDMA = 0, 156 ATA_SHIFT_MWDMA = 8, 157 ATA_SHIFT_PIO = 11, 158 159 /* Masks for port functions */ 160 ATA_PORT_PRIMARY = (1 << 0), 161 ATA_PORT_SECONDARY = (1 << 1), 162 }; 163 164 enum hsm_task_states { 165 HSM_ST_UNKNOWN, 166 HSM_ST_IDLE, 167 HSM_ST_POLL, 168 HSM_ST_TMOUT, 169 HSM_ST, 170 HSM_ST_LAST, 171 HSM_ST_LAST_POLL, 172 HSM_ST_ERR, 173 }; 174 175 enum ata_completion_errors { 176 AC_ERR_OTHER = (1 << 0), 177 AC_ERR_DEV = (1 << 1), 178 AC_ERR_ATA_BUS = (1 << 2), 179 AC_ERR_HOST_BUS = (1 << 3), 180 }; 181 182 /* forward declarations */ 183 struct scsi_device; 184 struct ata_port_operations; 185 struct ata_port; 186 struct ata_queued_cmd; 187 188 /* typedefs */ 189 typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, unsigned int err_mask); 190 191 struct ata_ioports { 192 unsigned long cmd_addr; 193 unsigned long data_addr; 194 unsigned long error_addr; 195 unsigned long feature_addr; 196 unsigned long nsect_addr; 197 unsigned long lbal_addr; 198 unsigned long lbam_addr; 199 unsigned long lbah_addr; 200 unsigned long device_addr; 201 unsigned long status_addr; 202 unsigned long command_addr; 203 unsigned long altstatus_addr; 204 unsigned long ctl_addr; 205 unsigned long bmdma_addr; 206 unsigned long scr_addr; 207 }; 208 209 struct ata_probe_ent { 210 struct list_head node; 211 struct device *dev; 212 const struct ata_port_operations *port_ops; 213 Scsi_Host_Template *sht; 214 struct ata_ioports port[ATA_MAX_PORTS]; 215 unsigned int n_ports; 216 unsigned int hard_port_no; 217 unsigned int pio_mask; 218 unsigned int mwdma_mask; 219 unsigned int udma_mask; 220 unsigned int legacy_mode; 221 unsigned long irq; 222 unsigned int irq_flags; 223 unsigned long host_flags; 224 void __iomem *mmio_base; 225 void *private_data; 226 }; 227 228 struct ata_host_set { 229 spinlock_t lock; 230 struct device *dev; 231 unsigned long irq; 232 void __iomem *mmio_base; 233 unsigned int n_ports; 234 void *private_data; 235 const struct ata_port_operations *ops; 236 struct ata_port * ports[0]; 237 }; 238 239 struct ata_queued_cmd { 240 struct ata_port *ap; 241 struct ata_device *dev; 242 243 struct scsi_cmnd *scsicmd; 244 void (*scsidone)(struct scsi_cmnd *); 245 246 struct ata_taskfile tf; 247 u8 cdb[ATAPI_CDB_LEN]; 248 249 unsigned long flags; /* ATA_QCFLAG_xxx */ 250 unsigned int tag; 251 unsigned int n_elem; 252 253 int dma_dir; 254 255 unsigned int nsect; 256 unsigned int cursect; 257 258 unsigned int nbytes; 259 unsigned int curbytes; 260 261 unsigned int cursg; 262 unsigned int cursg_ofs; 263 264 struct scatterlist sgent; 265 void *buf_virt; 266 267 struct scatterlist *sg; 268 269 ata_qc_cb_t complete_fn; 270 271 struct completion *waiting; 272 273 void *private_data; 274 }; 275 276 struct ata_host_stats { 277 unsigned long unhandled_irq; 278 unsigned long idle_irq; 279 unsigned long rw_reqbuf; 280 }; 281 282 struct ata_device { 283 u64 n_sectors; /* size of device, if ATA */ 284 unsigned long flags; /* ATA_DFLAG_xxx */ 285 unsigned int class; /* ATA_DEV_xxx */ 286 unsigned int devno; /* 0 or 1 */ 287 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 288 u8 pio_mode; 289 u8 dma_mode; 290 u8 xfer_mode; 291 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 292 293 unsigned int multi_count; /* sectors count for 294 READ/WRITE MULTIPLE */ 295 296 /* for CHS addressing */ 297 u16 cylinders; /* Number of cylinders */ 298 u16 heads; /* Number of heads */ 299 u16 sectors; /* Number of sectors per track */ 300 }; 301 302 struct ata_port { 303 struct Scsi_Host *host; /* our co-allocated scsi host */ 304 const struct ata_port_operations *ops; 305 unsigned long flags; /* ATA_FLAG_xxx */ 306 unsigned int id; /* unique id req'd by scsi midlyr */ 307 unsigned int port_no; /* unique port #; from zero */ 308 unsigned int hard_port_no; /* hardware port #; from zero */ 309 310 struct ata_prd *prd; /* our SG list */ 311 dma_addr_t prd_dma; /* and its DMA mapping */ 312 313 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 314 315 u8 ctl; /* cache of ATA control register */ 316 u8 last_ctl; /* Cache last written value */ 317 unsigned int bus_state; 318 unsigned int port_state; 319 unsigned int pio_mask; 320 unsigned int mwdma_mask; 321 unsigned int udma_mask; 322 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 323 unsigned int cdb_len; 324 325 struct ata_device device[ATA_MAX_DEVICES]; 326 327 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 328 unsigned long qactive; 329 unsigned int active_tag; 330 331 struct ata_host_stats stats; 332 struct ata_host_set *host_set; 333 334 struct work_struct packet_task; 335 336 struct work_struct pio_task; 337 unsigned int hsm_task_state; 338 unsigned long pio_task_timeout; 339 340 void *private_data; 341 }; 342 343 struct ata_port_operations { 344 void (*port_disable) (struct ata_port *); 345 346 void (*dev_config) (struct ata_port *, struct ata_device *); 347 348 void (*set_piomode) (struct ata_port *, struct ata_device *); 349 void (*set_dmamode) (struct ata_port *, struct ata_device *); 350 351 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); 352 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 353 354 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); 355 u8 (*check_status)(struct ata_port *ap); 356 u8 (*check_altstatus)(struct ata_port *ap); 357 void (*dev_select)(struct ata_port *ap, unsigned int device); 358 359 void (*phy_reset) (struct ata_port *ap); 360 void (*post_set_mode) (struct ata_port *ap); 361 362 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 363 364 void (*bmdma_setup) (struct ata_queued_cmd *qc); 365 void (*bmdma_start) (struct ata_queued_cmd *qc); 366 367 void (*qc_prep) (struct ata_queued_cmd *qc); 368 int (*qc_issue) (struct ata_queued_cmd *qc); 369 370 void (*eng_timeout) (struct ata_port *ap); 371 372 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); 373 void (*irq_clear) (struct ata_port *); 374 375 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 376 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 377 u32 val); 378 379 int (*port_start) (struct ata_port *ap); 380 void (*port_stop) (struct ata_port *ap); 381 382 void (*host_stop) (struct ata_host_set *host_set); 383 384 void (*bmdma_stop) (struct ata_queued_cmd *qc); 385 u8 (*bmdma_status) (struct ata_port *ap); 386 }; 387 388 struct ata_port_info { 389 Scsi_Host_Template *sht; 390 unsigned long host_flags; 391 unsigned long pio_mask; 392 unsigned long mwdma_mask; 393 unsigned long udma_mask; 394 const struct ata_port_operations *port_ops; 395 }; 396 397 struct ata_timing { 398 unsigned short mode; /* ATA mode */ 399 unsigned short setup; /* t1 */ 400 unsigned short act8b; /* t2 for 8-bit I/O */ 401 unsigned short rec8b; /* t2i for 8-bit I/O */ 402 unsigned short cyc8b; /* t0 for 8-bit I/O */ 403 unsigned short active; /* t2 or tD */ 404 unsigned short recover; /* t2i or tK */ 405 unsigned short cycle; /* t0 */ 406 unsigned short udma; /* t2CYCTYP/2 */ 407 }; 408 409 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) 410 411 extern void ata_port_probe(struct ata_port *); 412 extern void __sata_phy_reset(struct ata_port *ap); 413 extern void sata_phy_reset(struct ata_port *ap); 414 extern void ata_bus_reset(struct ata_port *ap); 415 extern void ata_port_disable(struct ata_port *); 416 extern void ata_std_ports(struct ata_ioports *ioaddr); 417 #ifdef CONFIG_PCI 418 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 419 unsigned int n_ports); 420 extern void ata_pci_remove_one (struct pci_dev *pdev); 421 #endif /* CONFIG_PCI */ 422 extern int ata_device_add(const struct ata_probe_ent *ent); 423 extern void ata_host_set_remove(struct ata_host_set *host_set); 424 extern int ata_scsi_detect(Scsi_Host_Template *sht); 425 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 426 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 427 extern int ata_scsi_error(struct Scsi_Host *host); 428 extern int ata_scsi_release(struct Scsi_Host *host); 429 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 430 extern int ata_ratelimit(void); 431 432 /* 433 * Default driver ops implementations 434 */ 435 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); 436 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 437 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); 438 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); 439 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 440 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 441 extern u8 ata_check_status(struct ata_port *ap); 442 extern u8 ata_altstatus(struct ata_port *ap); 443 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); 444 extern int ata_port_start (struct ata_port *ap); 445 extern void ata_port_stop (struct ata_port *ap); 446 extern void ata_host_stop (struct ata_host_set *host_set); 447 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); 448 extern void ata_qc_prep(struct ata_queued_cmd *qc); 449 extern int ata_qc_issue_prot(struct ata_queued_cmd *qc); 450 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 451 unsigned int buflen); 452 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 453 unsigned int n_elem); 454 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); 455 extern void ata_dev_id_string(const u16 *id, unsigned char *s, 456 unsigned int ofs, unsigned int len); 457 extern void ata_dev_config(struct ata_port *ap, unsigned int i); 458 extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 459 extern void ata_bmdma_start (struct ata_queued_cmd *qc); 460 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 461 extern u8 ata_bmdma_status(struct ata_port *ap); 462 extern void ata_bmdma_irq_clear(struct ata_port *ap); 463 extern void ata_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask); 464 extern void ata_eng_timeout(struct ata_port *ap); 465 extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd, 466 void (*done)(struct scsi_cmnd *)); 467 extern int ata_std_bios_param(struct scsi_device *sdev, 468 struct block_device *bdev, 469 sector_t capacity, int geom[]); 470 extern int ata_scsi_slave_config(struct scsi_device *sdev); 471 472 /* 473 * Timing helpers 474 */ 475 extern int ata_timing_compute(struct ata_device *, unsigned short, 476 struct ata_timing *, int, int); 477 extern void ata_timing_merge(const struct ata_timing *, 478 const struct ata_timing *, struct ata_timing *, 479 unsigned int); 480 481 enum { 482 ATA_TIMING_SETUP = (1 << 0), 483 ATA_TIMING_ACT8B = (1 << 1), 484 ATA_TIMING_REC8B = (1 << 2), 485 ATA_TIMING_CYC8B = (1 << 3), 486 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | 487 ATA_TIMING_CYC8B, 488 ATA_TIMING_ACTIVE = (1 << 4), 489 ATA_TIMING_RECOVER = (1 << 5), 490 ATA_TIMING_CYCLE = (1 << 6), 491 ATA_TIMING_UDMA = (1 << 7), 492 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | 493 ATA_TIMING_REC8B | ATA_TIMING_CYC8B | 494 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | 495 ATA_TIMING_CYCLE | ATA_TIMING_UDMA, 496 }; 497 498 499 #ifdef CONFIG_PCI 500 struct pci_bits { 501 unsigned int reg; /* PCI config register to read */ 502 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 503 unsigned long mask; 504 unsigned long val; 505 }; 506 507 extern void ata_pci_host_stop (struct ata_host_set *host_set); 508 extern struct ata_probe_ent * 509 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); 510 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 511 512 #endif /* CONFIG_PCI */ 513 514 515 static inline unsigned int ata_tag_valid(unsigned int tag) 516 { 517 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 518 } 519 520 static inline unsigned int ata_dev_present(const struct ata_device *dev) 521 { 522 return ((dev->class == ATA_DEV_ATA) || 523 (dev->class == ATA_DEV_ATAPI)); 524 } 525 526 static inline u8 ata_chk_status(struct ata_port *ap) 527 { 528 return ap->ops->check_status(ap); 529 } 530 531 532 /** 533 * ata_pause - Flush writes and pause 400 nanoseconds. 534 * @ap: Port to wait for. 535 * 536 * LOCKING: 537 * Inherited from caller. 538 */ 539 540 static inline void ata_pause(struct ata_port *ap) 541 { 542 ata_altstatus(ap); 543 ndelay(400); 544 } 545 546 547 /** 548 * ata_busy_wait - Wait for a port status register 549 * @ap: Port to wait for. 550 * 551 * Waits up to max*10 microseconds for the selected bits in the port's 552 * status register to be cleared. 553 * Returns final value of status register. 554 * 555 * LOCKING: 556 * Inherited from caller. 557 */ 558 559 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 560 unsigned int max) 561 { 562 u8 status; 563 564 do { 565 udelay(10); 566 status = ata_chk_status(ap); 567 max--; 568 } while ((status & bits) && (max > 0)); 569 570 return status; 571 } 572 573 574 /** 575 * ata_wait_idle - Wait for a port to be idle. 576 * @ap: Port to wait for. 577 * 578 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 579 * Returns final value of status register. 580 * 581 * LOCKING: 582 * Inherited from caller. 583 */ 584 585 static inline u8 ata_wait_idle(struct ata_port *ap) 586 { 587 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 588 589 if (status & (ATA_BUSY | ATA_DRQ)) { 590 unsigned long l = ap->ioaddr.status_addr; 591 printk(KERN_WARNING 592 "ATA: abnormal status 0x%X on port 0x%lX\n", 593 status, l); 594 } 595 596 return status; 597 } 598 599 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 600 { 601 qc->tf.ctl |= ATA_NIEN; 602 } 603 604 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, 605 unsigned int tag) 606 { 607 if (likely(ata_tag_valid(tag))) 608 return &ap->qcmd[tag]; 609 return NULL; 610 } 611 612 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device) 613 { 614 memset(tf, 0, sizeof(*tf)); 615 616 tf->ctl = ap->ctl; 617 if (device == 0) 618 tf->device = ATA_DEVICE_OBS; 619 else 620 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 621 } 622 623 624 /** 625 * ata_irq_on - Enable interrupts on a port. 626 * @ap: Port on which interrupts are enabled. 627 * 628 * Enable interrupts on a legacy IDE device using MMIO or PIO, 629 * wait for idle, clear any pending interrupts. 630 * 631 * LOCKING: 632 * Inherited from caller. 633 */ 634 635 static inline u8 ata_irq_on(struct ata_port *ap) 636 { 637 struct ata_ioports *ioaddr = &ap->ioaddr; 638 u8 tmp; 639 640 ap->ctl &= ~ATA_NIEN; 641 ap->last_ctl = ap->ctl; 642 643 if (ap->flags & ATA_FLAG_MMIO) 644 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); 645 else 646 outb(ap->ctl, ioaddr->ctl_addr); 647 tmp = ata_wait_idle(ap); 648 649 ap->ops->irq_clear(ap); 650 651 return tmp; 652 } 653 654 655 /** 656 * ata_irq_ack - Acknowledge a device interrupt. 657 * @ap: Port on which interrupts are enabled. 658 * 659 * Wait up to 10 ms for legacy IDE device to become idle (BUSY 660 * or BUSY+DRQ clear). Obtain dma status and port status from 661 * device. Clear the interrupt. Return port status. 662 * 663 * LOCKING: 664 */ 665 666 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) 667 { 668 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; 669 u8 host_stat, post_stat, status; 670 671 status = ata_busy_wait(ap, bits, 1000); 672 if (status & bits) 673 DPRINTK("abnormal status 0x%X\n", status); 674 675 /* get controller status; clear intr, err bits */ 676 if (ap->flags & ATA_FLAG_MMIO) { 677 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; 678 host_stat = readb(mmio + ATA_DMA_STATUS); 679 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 680 mmio + ATA_DMA_STATUS); 681 682 post_stat = readb(mmio + ATA_DMA_STATUS); 683 } else { 684 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 685 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 686 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 687 688 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 689 } 690 691 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", 692 host_stat, post_stat, status); 693 694 return status; 695 } 696 697 static inline u32 scr_read(struct ata_port *ap, unsigned int reg) 698 { 699 return ap->ops->scr_read(ap, reg); 700 } 701 702 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val) 703 { 704 ap->ops->scr_write(ap, reg, val); 705 } 706 707 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, 708 u32 val) 709 { 710 ap->ops->scr_write(ap, reg, val); 711 (void) ap->ops->scr_read(ap, reg); 712 } 713 714 static inline unsigned int sata_dev_present(struct ata_port *ap) 715 { 716 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; 717 } 718 719 static inline int ata_try_flush_cache(const struct ata_device *dev) 720 { 721 return ata_id_wcache_enabled(dev->id) || 722 ata_id_has_flush(dev->id) || 723 ata_id_has_flush_ext(dev->id); 724 } 725 726 static inline unsigned int ac_err_mask(u8 status) 727 { 728 if (status & ATA_BUSY) 729 return AC_ERR_ATA_BUS; 730 if (status & (ATA_ERR | ATA_DF)) 731 return AC_ERR_DEV; 732 return 0; 733 } 734 735 static inline unsigned int __ac_err_mask(u8 status) 736 { 737 unsigned int mask = ac_err_mask(status); 738 if (mask == 0) 739 return AC_ERR_OTHER; 740 return mask; 741 } 742 743 #endif /* __LINUX_LIBATA_H__ */ 744