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 void ata_host_set_remove(struct ata_host_set *host_set); 397 extern int ata_scsi_detect(Scsi_Host_Template *sht); 398 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); 399 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); 400 extern int ata_scsi_error(struct Scsi_Host *host); 401 extern int ata_scsi_release(struct Scsi_Host *host); 402 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); 403 /* 404 * Default driver ops implementations 405 */ 406 extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf); 407 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 408 extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp); 409 extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf); 410 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); 411 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); 412 extern u8 ata_check_status(struct ata_port *ap); 413 extern u8 ata_altstatus(struct ata_port *ap); 414 extern u8 ata_chk_err(struct ata_port *ap); 415 extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf); 416 extern int ata_port_start (struct ata_port *ap); 417 extern void ata_port_stop (struct ata_port *ap); 418 extern void ata_host_stop (struct ata_host_set *host_set); 419 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); 420 extern void ata_qc_prep(struct ata_queued_cmd *qc); 421 extern int ata_qc_issue_prot(struct ata_queued_cmd *qc); 422 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, 423 unsigned int buflen); 424 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 425 unsigned int n_elem); 426 extern unsigned int ata_dev_classify(struct ata_taskfile *tf); 427 extern void ata_dev_id_string(u16 *id, unsigned char *s, 428 unsigned int ofs, unsigned int len); 429 extern void ata_dev_config(struct ata_port *ap, unsigned int i); 430 extern void ata_bmdma_setup (struct ata_queued_cmd *qc); 431 extern void ata_bmdma_start (struct ata_queued_cmd *qc); 432 extern void ata_bmdma_stop(struct ata_queued_cmd *qc); 433 extern u8 ata_bmdma_status(struct ata_port *ap); 434 extern void ata_bmdma_irq_clear(struct ata_port *ap); 435 extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat); 436 extern void ata_eng_timeout(struct ata_port *ap); 437 extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd, 438 void (*done)(struct scsi_cmnd *)); 439 extern int ata_std_bios_param(struct scsi_device *sdev, 440 struct block_device *bdev, 441 sector_t capacity, int geom[]); 442 extern int ata_scsi_slave_config(struct scsi_device *sdev); 443 444 445 #ifdef CONFIG_PCI 446 struct pci_bits { 447 unsigned int reg; /* PCI config register to read */ 448 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ 449 unsigned long mask; 450 unsigned long val; 451 }; 452 453 extern void ata_pci_host_stop (struct ata_host_set *host_set); 454 extern struct ata_probe_ent * 455 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port); 456 extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits); 457 458 #endif /* CONFIG_PCI */ 459 460 461 static inline unsigned int ata_tag_valid(unsigned int tag) 462 { 463 return (tag < ATA_MAX_QUEUE) ? 1 : 0; 464 } 465 466 static inline unsigned int ata_dev_present(struct ata_device *dev) 467 { 468 return ((dev->class == ATA_DEV_ATA) || 469 (dev->class == ATA_DEV_ATAPI)); 470 } 471 472 static inline u8 ata_chk_status(struct ata_port *ap) 473 { 474 return ap->ops->check_status(ap); 475 } 476 477 478 /** 479 * ata_pause - Flush writes and pause 400 nanoseconds. 480 * @ap: Port to wait for. 481 * 482 * LOCKING: 483 * Inherited from caller. 484 */ 485 486 static inline void ata_pause(struct ata_port *ap) 487 { 488 ata_altstatus(ap); 489 ndelay(400); 490 } 491 492 493 /** 494 * ata_busy_wait - Wait for a port status register 495 * @ap: Port to wait for. 496 * 497 * Waits up to max*10 microseconds for the selected bits in the port's 498 * status register to be cleared. 499 * Returns final value of status register. 500 * 501 * LOCKING: 502 * Inherited from caller. 503 */ 504 505 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, 506 unsigned int max) 507 { 508 u8 status; 509 510 do { 511 udelay(10); 512 status = ata_chk_status(ap); 513 max--; 514 } while ((status & bits) && (max > 0)); 515 516 return status; 517 } 518 519 520 /** 521 * ata_wait_idle - Wait for a port to be idle. 522 * @ap: Port to wait for. 523 * 524 * Waits up to 10ms for port's BUSY and DRQ signals to clear. 525 * Returns final value of status register. 526 * 527 * LOCKING: 528 * Inherited from caller. 529 */ 530 531 static inline u8 ata_wait_idle(struct ata_port *ap) 532 { 533 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); 534 535 if (status & (ATA_BUSY | ATA_DRQ)) { 536 unsigned long l = ap->ioaddr.status_addr; 537 printk(KERN_WARNING 538 "ATA: abnormal status 0x%X on port 0x%lX\n", 539 status, l); 540 } 541 542 return status; 543 } 544 545 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) 546 { 547 qc->tf.ctl |= ATA_NIEN; 548 } 549 550 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, 551 unsigned int tag) 552 { 553 if (likely(ata_tag_valid(tag))) 554 return &ap->qcmd[tag]; 555 return NULL; 556 } 557 558 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device) 559 { 560 memset(tf, 0, sizeof(*tf)); 561 562 tf->ctl = ap->ctl; 563 if (device == 0) 564 tf->device = ATA_DEVICE_OBS; 565 else 566 tf->device = ATA_DEVICE_OBS | ATA_DEV1; 567 } 568 569 570 /** 571 * ata_irq_on - Enable interrupts on a port. 572 * @ap: Port on which interrupts are enabled. 573 * 574 * Enable interrupts on a legacy IDE device using MMIO or PIO, 575 * wait for idle, clear any pending interrupts. 576 * 577 * LOCKING: 578 * Inherited from caller. 579 */ 580 581 static inline u8 ata_irq_on(struct ata_port *ap) 582 { 583 struct ata_ioports *ioaddr = &ap->ioaddr; 584 u8 tmp; 585 586 ap->ctl &= ~ATA_NIEN; 587 ap->last_ctl = ap->ctl; 588 589 if (ap->flags & ATA_FLAG_MMIO) 590 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); 591 else 592 outb(ap->ctl, ioaddr->ctl_addr); 593 tmp = ata_wait_idle(ap); 594 595 ap->ops->irq_clear(ap); 596 597 return tmp; 598 } 599 600 601 /** 602 * ata_irq_ack - Acknowledge a device interrupt. 603 * @ap: Port on which interrupts are enabled. 604 * 605 * Wait up to 10 ms for legacy IDE device to become idle (BUSY 606 * or BUSY+DRQ clear). Obtain dma status and port status from 607 * device. Clear the interrupt. Return port status. 608 * 609 * LOCKING: 610 */ 611 612 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) 613 { 614 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; 615 u8 host_stat, post_stat, status; 616 617 status = ata_busy_wait(ap, bits, 1000); 618 if (status & bits) 619 DPRINTK("abnormal status 0x%X\n", status); 620 621 /* get controller status; clear intr, err bits */ 622 if (ap->flags & ATA_FLAG_MMIO) { 623 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; 624 host_stat = readb(mmio + ATA_DMA_STATUS); 625 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 626 mmio + ATA_DMA_STATUS); 627 628 post_stat = readb(mmio + ATA_DMA_STATUS); 629 } else { 630 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 631 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, 632 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 633 634 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); 635 } 636 637 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", 638 host_stat, post_stat, status); 639 640 return status; 641 } 642 643 static inline u32 scr_read(struct ata_port *ap, unsigned int reg) 644 { 645 return ap->ops->scr_read(ap, reg); 646 } 647 648 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val) 649 { 650 ap->ops->scr_write(ap, reg, val); 651 } 652 653 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, 654 u32 val) 655 { 656 ap->ops->scr_write(ap, reg, val); 657 (void) ap->ops->scr_read(ap, reg); 658 } 659 660 static inline unsigned int sata_dev_present(struct ata_port *ap) 661 { 662 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; 663 } 664 665 static inline int ata_try_flush_cache(struct ata_device *dev) 666 { 667 return ata_id_wcache_enabled(dev->id) || 668 ata_id_has_flush(dev->id) || 669 ata_id_has_flush_ext(dev->id); 670 } 671 672 #endif /* __LINUX_LIBATA_H__ */ 673