2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
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)
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.
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.
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
34 #include <linux/ata.h>
35 #include <linux/workqueue.h>
38 * compile-time options: to be removed as soon as all the drivers are
39 * converted to the new debugging mechanism
41 #undef ATA_DEBUG /* debugging output */
42 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
43 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
44 #undef ATA_NDEBUG /* define to disable quick runtime checks */
45 #undef ATA_ENABLE_PATA /* define to enable PATA support in some
46 * low-level drivers */
47 #undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */
50 /* note: prints function name for you */
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)
56 #define VPRINTK(fmt, args...)
57 #endif /* ATA_VERBOSE_DEBUG */
59 #define DPRINTK(fmt, args...)
60 #define VPRINTK(fmt, args...)
61 #endif /* ATA_DEBUG */
63 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
68 #define assert(expr) \
69 if(unlikely(!(expr))) { \
70 printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
71 #expr,__FILE__,__FUNCTION__,__LINE__); \
75 /* NEW: debug levels */
76 #define HAVE_LIBATA_MSG 1
80 ATA_MSG_INFO = 0x0002,
81 ATA_MSG_PROBE = 0x0004,
82 ATA_MSG_WARN = 0x0008,
83 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_INTR = 0x0040,
89 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
90 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
91 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
92 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
93 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
94 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
95 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
96 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100 if (dval < 0 || dval >= (sizeof(u32) * 8))
101 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
104 return (1 << dval) - 1;
107 /* defines only for the constants which don't work well as enums */
108 #define ATA_TAG_POISON 0xfafbfcfdU
110 /* move to PCI layer? */
111 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
117 /* various global constants */
118 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
122 ATA_MAX_SECTORS = 200, /* FIXME */
124 ATA_DEF_BUSY_WAIT = 10000,
125 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
127 ATA_SHT_EMULATED = 1,
128 ATA_SHT_CMD_PER_LUN = 1,
129 ATA_SHT_THIS_ID = -1,
130 ATA_SHT_USE_CLUSTERING = 1,
132 /* struct ata_device stuff */
133 ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */
134 ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */
135 ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */
136 ATA_DFLAG_LBA = (1 << 3), /* device supports LBA */
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 */
145 /* struct ata_port flags */
146 ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */
147 /* (doesn't imply presence) */
148 ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */
149 ATA_FLAG_SATA = (1 << 3),
150 ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */
151 ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */
152 ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */
153 ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */
154 ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */
155 ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once
156 * proper HSM is in place. */
157 ATA_FLAG_DEBUGMSG = (1 << 10),
158 ATA_FLAG_NO_ATAPI = (1 << 11), /* No ATAPI support */
160 ATA_FLAG_SUSPENDED = (1 << 12), /* port is suspended */
162 ATA_FLAG_PIO_LBA48 = (1 << 13), /* Host DMA engine is LBA28 only */
163 ATA_FLAG_IRQ_MASK = (1 << 14), /* Mask IRQ in PIO xfers */
165 ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */
166 ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */
167 ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */
168 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
170 /* various lengths of time */
171 ATA_TMOUT_EDD = 5 * HZ, /* heuristic */
172 ATA_TMOUT_PIO = 30 * HZ,
173 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
174 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
175 ATA_TMOUT_CDB = 30 * HZ,
176 ATA_TMOUT_CDB_QUICK = 5 * HZ,
177 ATA_TMOUT_INTERNAL = 30 * HZ,
178 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
192 /* SATA port states */
197 /* encoding various smaller bitmaps into a single
198 * unsigned long bitmap
204 /* size of buffer to pad xfers ending on unaligned boundaries */
206 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
208 /* Masks for port functions */
209 ATA_PORT_PRIMARY = (1 << 0),
210 ATA_PORT_SECONDARY = (1 << 1),
213 enum hsm_task_states {
224 enum ata_completion_errors {
225 AC_ERR_OTHER = (1 << 0),
226 AC_ERR_DEV = (1 << 1),
227 AC_ERR_ATA_BUS = (1 << 2),
228 AC_ERR_HOST_BUS = (1 << 3),
231 /* forward declarations */
233 struct ata_port_operations;
235 struct ata_queued_cmd;
238 typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
241 unsigned long cmd_addr;
242 unsigned long data_addr;
243 unsigned long error_addr;
244 unsigned long feature_addr;
245 unsigned long nsect_addr;
246 unsigned long lbal_addr;
247 unsigned long lbam_addr;
248 unsigned long lbah_addr;
249 unsigned long device_addr;
250 unsigned long status_addr;
251 unsigned long command_addr;
252 unsigned long altstatus_addr;
253 unsigned long ctl_addr;
254 unsigned long bmdma_addr;
255 unsigned long scr_addr;
258 struct ata_probe_ent {
259 struct list_head node;
261 const struct ata_port_operations *port_ops;
262 struct scsi_host_template *sht;
263 struct ata_ioports port[ATA_MAX_PORTS];
264 unsigned int n_ports;
265 unsigned int hard_port_no;
266 unsigned int pio_mask;
267 unsigned int mwdma_mask;
268 unsigned int udma_mask;
269 unsigned int legacy_mode;
271 unsigned int irq_flags;
272 unsigned long host_flags;
273 void __iomem *mmio_base;
277 struct ata_host_set {
281 void __iomem *mmio_base;
282 unsigned int n_ports;
284 const struct ata_port_operations *ops;
285 struct ata_port * ports[0];
288 struct ata_queued_cmd {
290 struct ata_device *dev;
292 struct scsi_cmnd *scsicmd;
293 void (*scsidone)(struct scsi_cmnd *);
295 struct ata_taskfile tf;
296 u8 cdb[ATAPI_CDB_LEN];
298 unsigned long flags; /* ATA_QCFLAG_xxx */
301 unsigned int orig_n_elem;
305 unsigned int pad_len;
308 unsigned int cursect;
311 unsigned int curbytes;
314 unsigned int cursg_ofs;
316 struct scatterlist sgent;
317 struct scatterlist pad_sgent;
320 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
321 struct scatterlist *__sg;
323 unsigned int err_mask;
325 ata_qc_cb_t complete_fn;
330 struct ata_host_stats {
331 unsigned long unhandled_irq;
332 unsigned long idle_irq;
333 unsigned long rw_reqbuf;
337 u64 n_sectors; /* size of device, if ATA */
338 unsigned long flags; /* ATA_DFLAG_xxx */
339 unsigned int class; /* ATA_DEV_xxx */
340 unsigned int devno; /* 0 or 1 */
341 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
345 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
347 unsigned int multi_count; /* sectors count for
348 READ/WRITE MULTIPLE */
350 /* for CHS addressing */
351 u16 cylinders; /* Number of cylinders */
352 u16 heads; /* Number of heads */
353 u16 sectors; /* Number of sectors per track */
357 struct Scsi_Host *host; /* our co-allocated scsi host */
358 const struct ata_port_operations *ops;
359 unsigned long flags; /* ATA_FLAG_xxx */
360 unsigned int id; /* unique id req'd by scsi midlyr */
361 unsigned int port_no; /* unique port #; from zero */
362 unsigned int hard_port_no; /* hardware port #; from zero */
364 struct ata_prd *prd; /* our SG list */
365 dma_addr_t prd_dma; /* and its DMA mapping */
367 void *pad; /* array of DMA pad buffers */
370 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
372 u8 ctl; /* cache of ATA control register */
373 u8 last_ctl; /* Cache last written value */
374 unsigned int pio_mask;
375 unsigned int mwdma_mask;
376 unsigned int udma_mask;
377 unsigned int cbl; /* cable type; ATA_CBL_xxx */
378 unsigned int cdb_len;
380 struct ata_device device[ATA_MAX_DEVICES];
382 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
383 unsigned long qactive;
384 unsigned int active_tag;
386 struct ata_host_stats stats;
387 struct ata_host_set *host_set;
389 struct work_struct packet_task;
391 struct work_struct pio_task;
392 unsigned int hsm_task_state;
393 unsigned long pio_task_timeout;
400 struct ata_port_operations {
401 void (*port_disable) (struct ata_port *);
403 void (*dev_config) (struct ata_port *, struct ata_device *);
405 void (*set_piomode) (struct ata_port *, struct ata_device *);
406 void (*set_dmamode) (struct ata_port *, struct ata_device *);
408 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
409 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
411 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
412 u8 (*check_status)(struct ata_port *ap);
413 u8 (*check_altstatus)(struct ata_port *ap);
414 void (*dev_select)(struct ata_port *ap, unsigned int device);
416 void (*phy_reset) (struct ata_port *ap);
417 void (*post_set_mode) (struct ata_port *ap);
419 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
421 void (*bmdma_setup) (struct ata_queued_cmd *qc);
422 void (*bmdma_start) (struct ata_queued_cmd *qc);
424 void (*qc_prep) (struct ata_queued_cmd *qc);
425 int (*qc_issue) (struct ata_queued_cmd *qc);
427 void (*eng_timeout) (struct ata_port *ap);
429 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
430 void (*irq_clear) (struct ata_port *);
432 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
433 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
436 int (*port_start) (struct ata_port *ap);
437 void (*port_stop) (struct ata_port *ap);
439 void (*host_stop) (struct ata_host_set *host_set);
441 void (*bmdma_stop) (struct ata_queued_cmd *qc);
442 u8 (*bmdma_status) (struct ata_port *ap);
445 struct ata_port_info {
446 struct scsi_host_template *sht;
447 unsigned long host_flags;
448 unsigned long pio_mask;
449 unsigned long mwdma_mask;
450 unsigned long udma_mask;
451 const struct ata_port_operations *port_ops;
456 unsigned short mode; /* ATA mode */
457 unsigned short setup; /* t1 */
458 unsigned short act8b; /* t2 for 8-bit I/O */
459 unsigned short rec8b; /* t2i for 8-bit I/O */
460 unsigned short cyc8b; /* t0 for 8-bit I/O */
461 unsigned short active; /* t2 or tD */
462 unsigned short recover; /* t2i or tK */
463 unsigned short cycle; /* t0 */
464 unsigned short udma; /* t2CYCTYP/2 */
467 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
469 extern void ata_port_probe(struct ata_port *);
470 extern void __sata_phy_reset(struct ata_port *ap);
471 extern void sata_phy_reset(struct ata_port *ap);
472 extern void ata_bus_reset(struct ata_port *ap);
473 extern void ata_port_disable(struct ata_port *);
474 extern void ata_std_ports(struct ata_ioports *ioaddr);
476 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
477 unsigned int n_ports);
478 extern void ata_pci_remove_one (struct pci_dev *pdev);
479 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
480 extern int ata_pci_device_resume(struct pci_dev *pdev);
481 #endif /* CONFIG_PCI */
482 extern int ata_device_add(const struct ata_probe_ent *ent);
483 extern void ata_host_set_remove(struct ata_host_set *host_set);
484 extern int ata_scsi_detect(struct scsi_host_template *sht);
485 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
486 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
487 extern int ata_scsi_error(struct Scsi_Host *host);
488 extern int ata_scsi_release(struct Scsi_Host *host);
489 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
490 extern int ata_scsi_device_resume(struct scsi_device *);
491 extern int ata_scsi_device_suspend(struct scsi_device *);
492 extern int ata_device_resume(struct ata_port *, struct ata_device *);
493 extern int ata_device_suspend(struct ata_port *, struct ata_device *);
494 extern int ata_ratelimit(void);
497 * Default driver ops implementations
499 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
500 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
501 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
502 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
503 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
504 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
505 extern u8 ata_check_status(struct ata_port *ap);
506 extern u8 ata_altstatus(struct ata_port *ap);
507 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
508 extern int ata_port_start (struct ata_port *ap);
509 extern void ata_port_stop (struct ata_port *ap);
510 extern void ata_host_stop (struct ata_host_set *host_set);
511 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
512 extern void ata_qc_prep(struct ata_queued_cmd *qc);
513 extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
514 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
515 unsigned int buflen);
516 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
517 unsigned int n_elem);
518 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
519 extern void ata_dev_id_string(const u16 *id, unsigned char *s,
520 unsigned int ofs, unsigned int len);
521 extern void ata_dev_config(struct ata_port *ap, unsigned int i);
522 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
523 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
524 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
525 extern u8 ata_bmdma_status(struct ata_port *ap);
526 extern void ata_bmdma_irq_clear(struct ata_port *ap);
527 extern void ata_qc_complete(struct ata_queued_cmd *qc);
528 extern void ata_eng_timeout(struct ata_port *ap);
529 extern void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
530 struct scsi_cmnd *cmd,
531 void (*done)(struct scsi_cmnd *));
532 extern int ata_std_bios_param(struct scsi_device *sdev,
533 struct block_device *bdev,
534 sector_t capacity, int geom[]);
535 extern int ata_scsi_slave_config(struct scsi_device *sdev);
541 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
542 extern int ata_timing_compute(struct ata_device *, unsigned short,
543 struct ata_timing *, int, int);
544 extern void ata_timing_merge(const struct ata_timing *,
545 const struct ata_timing *, struct ata_timing *,
549 ATA_TIMING_SETUP = (1 << 0),
550 ATA_TIMING_ACT8B = (1 << 1),
551 ATA_TIMING_REC8B = (1 << 2),
552 ATA_TIMING_CYC8B = (1 << 3),
553 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
555 ATA_TIMING_ACTIVE = (1 << 4),
556 ATA_TIMING_RECOVER = (1 << 5),
557 ATA_TIMING_CYCLE = (1 << 6),
558 ATA_TIMING_UDMA = (1 << 7),
559 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
560 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
561 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
562 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
568 unsigned int reg; /* PCI config register to read */
569 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
574 extern void ata_pci_host_stop (struct ata_host_set *host_set);
575 extern struct ata_probe_ent *
576 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
577 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
579 #endif /* CONFIG_PCI */
583 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
585 if (sg == &qc->pad_sgent)
589 if (((sg - qc->__sg) + 1) == qc->n_elem)
594 static inline struct scatterlist *
595 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
597 if (sg == &qc->pad_sgent)
599 if (++sg - qc->__sg < qc->n_elem)
601 return qc->pad_len ? &qc->pad_sgent : NULL;
604 #define ata_for_each_sg(sg, qc) \
605 for (sg = qc->__sg; sg; sg = ata_qc_next_sg(sg, qc))
607 static inline unsigned int ata_tag_valid(unsigned int tag)
609 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
612 static inline unsigned int ata_dev_present(const struct ata_device *dev)
614 return ((dev->class == ATA_DEV_ATA) ||
615 (dev->class == ATA_DEV_ATAPI));
618 static inline u8 ata_chk_status(struct ata_port *ap)
620 return ap->ops->check_status(ap);
625 * ata_pause - Flush writes and pause 400 nanoseconds.
626 * @ap: Port to wait for.
629 * Inherited from caller.
632 static inline void ata_pause(struct ata_port *ap)
640 * ata_busy_wait - Wait for a port status register
641 * @ap: Port to wait for.
643 * Waits up to max*10 microseconds for the selected bits in the port's
644 * status register to be cleared.
645 * Returns final value of status register.
648 * Inherited from caller.
651 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
658 status = ata_chk_status(ap);
660 } while ((status & bits) && (max > 0));
667 * ata_wait_idle - Wait for a port to be idle.
668 * @ap: Port to wait for.
670 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
671 * Returns final value of status register.
674 * Inherited from caller.
677 static inline u8 ata_wait_idle(struct ata_port *ap)
679 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
681 if (status & (ATA_BUSY | ATA_DRQ)) {
682 unsigned long l = ap->ioaddr.status_addr;
683 if (ata_msg_warn(ap))
684 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
691 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
693 qc->tf.ctl |= ATA_NIEN;
696 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
699 if (likely(ata_tag_valid(tag)))
700 return &ap->qcmd[tag];
704 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
706 memset(tf, 0, sizeof(*tf));
710 tf->device = ATA_DEVICE_OBS;
712 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
715 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
719 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
721 qc->nbytes = qc->curbytes = 0;
724 ata_tf_init(qc->ap, &qc->tf, qc->dev->devno);
729 * ata_irq_on - Enable interrupts on a port.
730 * @ap: Port on which interrupts are enabled.
732 * Enable interrupts on a legacy IDE device using MMIO or PIO,
733 * wait for idle, clear any pending interrupts.
736 * Inherited from caller.
739 static inline u8 ata_irq_on(struct ata_port *ap)
741 struct ata_ioports *ioaddr = &ap->ioaddr;
744 ap->ctl &= ~ATA_NIEN;
745 ap->last_ctl = ap->ctl;
747 if (ap->flags & ATA_FLAG_MMIO)
748 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
750 outb(ap->ctl, ioaddr->ctl_addr);
751 tmp = ata_wait_idle(ap);
753 ap->ops->irq_clear(ap);
760 * ata_irq_ack - Acknowledge a device interrupt.
761 * @ap: Port on which interrupts are enabled.
763 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
764 * or BUSY+DRQ clear). Obtain dma status and port status from
765 * device. Clear the interrupt. Return port status.
770 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
772 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
773 u8 host_stat, post_stat, status;
775 status = ata_busy_wait(ap, bits, 1000);
778 printk(KERN_ERR "abnormal status 0x%X\n", status);
780 /* get controller status; clear intr, err bits */
781 if (ap->flags & ATA_FLAG_MMIO) {
782 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
783 host_stat = readb(mmio + ATA_DMA_STATUS);
784 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
785 mmio + ATA_DMA_STATUS);
787 post_stat = readb(mmio + ATA_DMA_STATUS);
789 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
790 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
791 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
793 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
796 if (ata_msg_intr(ap))
797 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
799 host_stat, post_stat, status);
804 static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
806 return ap->ops->scr_read(ap, reg);
809 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
811 ap->ops->scr_write(ap, reg, val);
814 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
817 ap->ops->scr_write(ap, reg, val);
818 (void) ap->ops->scr_read(ap, reg);
821 static inline unsigned int sata_dev_present(struct ata_port *ap)
823 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
826 static inline int ata_try_flush_cache(const struct ata_device *dev)
828 return ata_id_wcache_enabled(dev->id) ||
829 ata_id_has_flush(dev->id) ||
830 ata_id_has_flush_ext(dev->id);
833 static inline unsigned int ac_err_mask(u8 status)
835 if (status & ATA_BUSY)
836 return AC_ERR_ATA_BUS;
837 if (status & (ATA_ERR | ATA_DF))
842 static inline unsigned int __ac_err_mask(u8 status)
844 unsigned int mask = ac_err_mask(status);
850 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
853 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
854 &ap->pad_dma, GFP_KERNEL);
855 return (ap->pad == NULL) ? -ENOMEM : 0;
858 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
860 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
863 #endif /* __LINUX_LIBATA_H__ */