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 = 0, 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 */ 100 101 ATA_DEV_UNKNOWN = 0, /* unknown device */ 102 ATA_DEV_ATA = 1, /* ATA device */ 103 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ 104 ATA_DEV_ATAPI = 3, /* ATAPI device */ 105 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ 106 ATA_DEV_NONE = 5, /* no device */ 107 108 /* struct ata_port flags */ 109 ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */ 110 /* (doesn't imply presence) */ 111 ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */ 112 ATA_FLAG_SATA = (1 << 3), 113 ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */ 114 ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */ 115 ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */ 116 ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */ 117 ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */ 118 ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once 119 * proper HSM is in place. */ 120 121 ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */ 122 ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */ 123 ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */ 124 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, 125 126 /* various lengths of time */ 127 ATA_TMOUT_EDD = 5 * HZ, /* hueristic */ 128 ATA_TMOUT_PIO = 30 * HZ, 129 ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */ 130 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */ 131 ATA_TMOUT_CDB = 30 * HZ, 132 ATA_TMOUT_CDB_QUICK = 5 * HZ, 133 134 /* ATA bus states */ 135 BUS_UNKNOWN = 0, 136 BUS_DMA = 1, 137 BUS_IDLE = 2, 138 BUS_NOINTR = 3, 139 BUS_NODATA = 4, 140 BUS_TIMER = 5, 141 BUS_PIO = 6, 142 BUS_EDD = 7, 143 BUS_IDENTIFY = 8, 144 BUS_PACKET = 9, 145 146 /* SATA port states */ 147 PORT_UNKNOWN = 0, 148 PORT_ENABLED = 1, 149 PORT_DISABLED = 2, 150 151 /* encoding various smaller bitmaps into a single 152 * unsigned long bitmap 153 */ 154 ATA_SHIFT_UDMA = 0, 155 ATA_SHIFT_MWDMA = 8, 156 ATA_SHIFT_PIO = 11, 157 }; 158 159 enum pio_task_states { 160 PIO_ST_UNKNOWN, 161 PIO_ST_IDLE, 162 PIO_ST_POLL, 163 PIO_ST_TMOUT, 164 PIO_ST, 165 PIO_ST_LAST, 166 PIO_ST_LAST_POLL, 167 PIO_ST_ERR, 168 }; 169 170 /* forward declarations */ 171 struct scsi_device; 172 struct ata_port_operations; 173 struct ata_port; 174 struct ata_queued_cmd; 175 176 /* typedefs */ 177 typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, u8 drv_stat); 178 179 struct ata_ioports { 180 unsigned long cmd_addr; 181 unsigned long data_addr; 182 unsigned long error_addr; 183 unsigned long feature_addr; 184 unsigned long nsect_addr; 185 unsigned long lbal_addr; 186 unsigned long lbam_addr; 187 unsigned long lbah_addr; 188 unsigned long device_addr; 189 unsigned long status_addr; 190 unsigned long command_addr; 191 unsigned long altstatus_addr; 192 unsigned long ctl_addr; 193 unsigned long bmdma_addr; 194 unsigned long scr_addr; 195 }; 196 197 struct ata_probe_ent { 198 struct list_head node; 199 struct device *dev; 200 struct ata_port_operations *port_ops; 201 Scsi_Host_Template *sht; 202 struct ata_ioports port[ATA_MAX_PORTS]; 203 unsigned int n_ports; 204 unsigned int hard_port_no; 205 unsigned int pio_mask; 206 unsigned int mwdma_mask; 207 unsigned int udma_mask; 208 unsigned int legacy_mode; 209 unsigned long irq; 210 unsigned int irq_flags; 211 unsigned long host_flags; 212 void __iomem *mmio_base; 213 void *private_data; 214 }; 215 216 struct ata_host_set { 217 spinlock_t lock; 218 struct device *dev; 219 unsigned long irq; 220 void __iomem *mmio_base; 221 unsigned int n_ports; 222 void *private_data; 223 struct ata_port_operations *ops; 224 struct ata_port * ports[0]; 225 }; 226 227 struct ata_queued_cmd { 228 struct ata_port *ap; 229 struct ata_device *dev; 230 231 struct scsi_cmnd *scsicmd; 232 void (*scsidone)(struct scsi_cmnd *); 233 234 struct ata_taskfile tf; 235 u8 cdb[ATAPI_CDB_LEN]; 236 237 unsigned long flags; /* ATA_QCFLAG_xxx */ 238 unsigned int tag; 239 unsigned int n_elem; 240 241 int dma_dir; 242 243 unsigned int nsect; 244 unsigned int cursect; 245 246 unsigned int nbytes; 247 unsigned int curbytes; 248 249 unsigned int cursg; 250 unsigned int cursg_ofs; 251 252 struct scatterlist sgent; 253 void *buf_virt; 254 255 struct scatterlist *sg; 256 257 ata_qc_cb_t complete_fn; 258 259 struct completion *waiting; 260 261 void *private_data; 262 }; 263 264 struct ata_host_stats { 265 unsigned long unhandled_irq; 266 unsigned long idle_irq; 267 unsigned long rw_reqbuf; 268 }; 269 270 struct ata_device { 271 u64 n_sectors; /* size of device, if ATA */ 272 unsigned long flags; /* ATA_DFLAG_xxx */ 273 unsigned int class; /* ATA_DEV_xxx */ 274 unsigned int devno; /* 0 or 1 */ 275 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 276 u8 pio_mode; 277 u8 dma_mode; 278 u8 xfer_mode; 279 unsigned int xfer_shift; /* ATA_SHIFT_xxx */ 280 281 /* cache info about current transfer mode */ 282 u8 xfer_protocol; /* taskfile xfer protocol */ 283 u8 read_cmd; /* opcode to use on read */ 284 u8 write_cmd; /* opcode to use on write */ 285 }; 286 287 struct ata_port { 288 struct Scsi_Host *host; /* our co-allocated scsi host */ 289 struct ata_port_operations *ops; 290 unsigned long flags; /* ATA_FLAG_xxx */ 291 unsigned int id; /* unique id req'd by scsi midlyr */ 292 unsigned int port_no; /* unique port #; from zero */ 293 unsigned int hard_port_no; /* hardware port #; from zero */ 294 295 struct ata_prd *prd; /* our SG list */ 296 dma_addr_t prd_dma; /* and its DMA mapping */ 297 298 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ 299 300 u8 ctl; /* cache of ATA control register */ 301 u8 last_ctl; /* Cache last written value */ 302 unsigned int bus_state; 303 unsigned int port_state; 304 unsigned int pio_mask; 305 unsigned int mwdma_mask; 306 unsigned int udma_mask; 307 unsigned int cbl; /* cable type; ATA_CBL_xxx */ 308 unsigned int cdb_len; 309 310 struct ata_device device[ATA_MAX_DEVICES]; 311 312 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; 313 unsigned long qactive; 314 unsigned int active_tag; 315 316 struct ata_host_stats stats; 317 struct ata_host_set *host_set; 318 319 struct work_struct packet_task; 320 321 struct work_struct pio_task; 322 unsigned int pio_task_state; 323 unsigned long pio_task_timeout; 324 325 void *private_data; 326 }; 327 328 struct ata_port_operations { 329 void (*port_disable) (struct ata_port *); 330 331 void (*dev_config) (struct ata_port *, struct ata_device *); 332 333 void (*set_piomode) (struct ata_port *, struct ata_device *); 334 void (*set_dmamode) (struct ata_port *, struct ata_device *); 335 336 void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf); 337 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); 338 339 void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf); 340 u8 (*check_status)(struct ata_port *ap); 341 u8 (*check_altstatus)(struct ata_port *ap); 342 u8 (*check_err)(struct ata_port *ap); 343 void (*dev_select)(struct ata_port *ap, unsigned int device); 344 345 void (*phy_reset) (struct ata_port *ap); 346 void (*post_set_mode) (struct ata_port *ap); 347 348 int (*check_atapi_dma) (struct ata_queued_cmd *qc); 349 350 void (*bmdma_setup) (struct ata_queued_cmd *qc); 351 void (*bmdma_start) (struct ata_queued_cmd *qc); 352 353 void (*qc_prep) (struct ata_queued_cmd *qc); 354 int (*qc_issue) (struct ata_queued_cmd *qc); 355 356 void (*eng_timeout) (struct ata_port *ap); 357 358 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); 359 void (*irq_clear) (struct ata_port *); 360 361 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); 362 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, 363 u32 val); 364 365 int (*port_start) (struct ata_port *ap); 366 void (*port_stop) (struct ata_port *ap); 367 368 void (*host_stop) (struct ata_host_set *host_set); 369 370 void (*bmdma_stop) (struct ata_queued_cmd *qc); 371 u8 (*bmdma_status) (struct ata_port *ap); 372 }; 373 374 struct ata_port_info { 375 Scsi_Host_Template *sht; 376 unsigned long host_flags; 377 unsigned long pio_mask; 378 unsigned long mwdma_mask; 379 unsigned long udma_mask; 380 struct ata_port_operations *port_ops; 381 }; 382 383 384 extern void ata_port_probe(struct ata_port *); 385 extern void __sata_phy_reset(struct ata_port *ap); 386 extern void sata_phy_reset(struct ata_port *ap); 387 extern void ata_bus_reset(struct ata_port *ap); 388 extern void ata_port_disable(struct ata_port *); 389 extern void ata_std_ports(struct ata_ioports *ioaddr); 390 #ifdef CONFIG_PCI 391 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 392 unsigned int n_ports); 393 extern void ata_pci_remove_one (struct pci_dev *pdev); 394 #endif /* CONFIG_PCI */ 395 extern int ata_device_add(struct ata_probe_ent *ent); 396 extern int ata_scsi_detect(Scsi_Host_Template *sht); 397 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 398 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 399 extern int ata_scsi_error(struct Scsi_Host *host); 400 extern int ata_scsi_release(struct Scsi_Host *host); 401 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 402 /* 403 * Default driver ops implementations 404 */ 405 extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf); 406 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 407 extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp); 408 extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf); 409 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 410 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 411 extern u8 ata_check_status(struct ata_port *ap); 412 extern u8 ata_altstatus(struct ata_port *ap); 413 extern u8 ata_chk_err(struct ata_port *ap); 414 extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf); 415 extern int ata_port_start (struct ata_port *ap); 416 extern void ata_port_stop (struct ata_port *ap); 417 extern void ata_host_stop (struct ata_host_set *host_set); 418 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); 419 extern void ata_qc_prep(struct ata_queued_cmd *qc); 420 extern int ata_qc_issue_prot(struct ata_queued_cmd *qc); 421 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 422 unsigned int buflen); 423 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 424 unsigned int n_elem); 425 extern unsigned int ata_dev_classify(struct ata_taskfile *tf); 426 extern void ata_dev_id_string(u16 *id, unsigned char *s, 427 unsigned int ofs, unsigned int len); 428 extern void ata_dev_config(struct ata_port *ap, unsigned int i); 429 extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 430 extern void ata_bmdma_start (struct ata_queued_cmd *qc); 431 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 432 extern u8 ata_bmdma_status(struct ata_port *ap); 433 extern void ata_bmdma_irq_clear(struct ata_port *ap); 434 extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat); 435 extern void ata_eng_timeout(struct ata_port *ap); 436 extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd, 437 void (*done)(struct scsi_cmnd *)); 438 extern int ata_std_bios_param(struct scsi_device *sdev, 439 struct block_device *bdev, 440 sector_t capacity, int geom[]); 441 extern int ata_scsi_slave_config(struct scsi_device *sdev); 442 443 444 #ifdef CONFIG_PCI 445 struct pci_bits { 446 unsigned int reg; /* PCI config register to read */ 447 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 448 unsigned long mask; 449 unsigned long val; 450 }; 451 452 extern void ata_pci_host_stop (struct ata_host_set *host_set); 453 extern struct ata_probe_ent * 454 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port); 455 extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits); 456 457 #endif /* CONFIG_PCI */ 458 459 460 static inline unsigned int ata_tag_valid(unsigned int tag) 461 { 462 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 463 } 464 465 static inline unsigned int ata_dev_present(struct ata_device *dev) 466 { 467 return ((dev->class == ATA_DEV_ATA) || 468 (dev->class == ATA_DEV_ATAPI)); 469 } 470 471 static inline u8 ata_chk_status(struct ata_port *ap) 472 { 473 return ap->ops->check_status(ap); 474 } 475 476 477 /** 478 * ata_pause - Flush writes and pause 400 nanoseconds. 479 * @ap: Port to wait for. 480 * 481 * LOCKING: 482 * Inherited from caller. 483 */ 484 485 static inline void ata_pause(struct ata_port *ap) 486 { 487 ata_altstatus(ap); 488 ndelay(400); 489 } 490 491 492 /** 493 * ata_busy_wait - Wait for a port status register 494 * @ap: Port to wait for. 495 * 496 * Waits up to max*10 microseconds for the selected bits in the port's 497 * status register to be cleared. 498 * Returns final value of status register. 499 * 500 * LOCKING: 501 * Inherited from caller. 502 */ 503 504 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 505 unsigned int max) 506 { 507 u8 status; 508 509 do { 510 udelay(10); 511 status = ata_chk_status(ap); 512 max--; 513 } while ((status & bits) && (max > 0)); 514 515 return status; 516 } 517 518 519 /** 520 * ata_wait_idle - Wait for a port to be idle. 521 * @ap: Port to wait for. 522 * 523 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 524 * Returns final value of status register. 525 * 526 * LOCKING: 527 * Inherited from caller. 528 */ 529 530 static inline u8 ata_wait_idle(struct ata_port *ap) 531 { 532 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 533 534 if (status & (ATA_BUSY | ATA_DRQ)) { 535 unsigned long l = ap->ioaddr.status_addr; 536 printk(KERN_WARNING 537 "ATA: abnormal status 0x%X on port 0x%lX\n", 538 status, l); 539 } 540 541 return status; 542 } 543 544 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 545 { 546 qc->tf.ctl |= ATA_NIEN; 547 } 548 549 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, 550 unsigned int tag) 551 { 552 if (likely(ata_tag_valid(tag))) 553 return &ap->qcmd[tag]; 554 return NULL; 555 } 556 557 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device) 558 { 559 memset(tf, 0, sizeof(*tf)); 560 561 tf->ctl = ap->ctl; 562 if (device == 0) 563 tf->device = ATA_DEVICE_OBS; 564 else 565 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 566 } 567 568 569 /** 570 * ata_irq_on - Enable interrupts on a port. 571 * @ap: Port on which interrupts are enabled. 572 * 573 * Enable interrupts on a legacy IDE device using MMIO or PIO, 574 * wait for idle, clear any pending interrupts. 575 * 576 * LOCKING: 577 * Inherited from caller. 578 */ 579 580 static inline u8 ata_irq_on(struct ata_port *ap) 581 { 582 struct ata_ioports *ioaddr = &ap->ioaddr; 583 u8 tmp; 584 585 ap->ctl &= ~ATA_NIEN; 586 ap->last_ctl = ap->ctl; 587 588 if (ap->flags & ATA_FLAG_MMIO) 589 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); 590 else 591 outb(ap->ctl, ioaddr->ctl_addr); 592 tmp = ata_wait_idle(ap); 593 594 ap->ops->irq_clear(ap); 595 596 return tmp; 597 } 598 599 600 /** 601 * ata_irq_ack - Acknowledge a device interrupt. 602 * @ap: Port on which interrupts are enabled. 603 * 604 * Wait up to 10 ms for legacy IDE device to become idle (BUSY 605 * or BUSY+DRQ clear). Obtain dma status and port status from 606 * device. Clear the interrupt. Return port status. 607 * 608 * LOCKING: 609 */ 610 611 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) 612 { 613 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; 614 u8 host_stat, post_stat, status; 615 616 status = ata_busy_wait(ap, bits, 1000); 617 if (status & bits) 618 DPRINTK("abnormal status 0x%X\n", status); 619 620 /* get controller status; clear intr, err bits */ 621 if (ap->flags & ATA_FLAG_MMIO) { 622 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; 623 host_stat = readb(mmio + ATA_DMA_STATUS); 624 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 625 mmio + ATA_DMA_STATUS); 626 627 post_stat = readb(mmio + ATA_DMA_STATUS); 628 } else { 629 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 630 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 631 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 632 633 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 634 } 635 636 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", 637 host_stat, post_stat, status); 638 639 return status; 640 } 641 642 static inline u32 scr_read(struct ata_port *ap, unsigned int reg) 643 { 644 return ap->ops->scr_read(ap, reg); 645 } 646 647 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val) 648 { 649 ap->ops->scr_write(ap, reg, val); 650 } 651 652 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, 653 u32 val) 654 { 655 ap->ops->scr_write(ap, reg, val); 656 (void) ap->ops->scr_read(ap, reg); 657 } 658 659 static inline unsigned int sata_dev_present(struct ata_port *ap) 660 { 661 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; 662 } 663 664 static inline int ata_try_flush_cache(struct ata_device *dev) 665 { 666 return ata_id_wcache_enabled(dev->id) || 667 ata_id_has_flush(dev->id) || 668 ata_id_has_flush_ext(dev->id); 669 } 670 671 #endif /* __LINUX_LIBATA_H__ */ 672