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
40 #undef ATA_DEBUG /* debugging output */
41 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
42 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
43 #undef ATA_NDEBUG /* define to disable quick runtime checks */
44 #undef ATA_ENABLE_PATA /* define to enable PATA support in some
45 * low-level drivers */
46 #undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */
49 /* note: prints function name for you */
51 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
52 #ifdef ATA_VERBOSE_DEBUG
53 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
55 #define VPRINTK(fmt, args...)
56 #endif /* ATA_VERBOSE_DEBUG */
58 #define DPRINTK(fmt, args...)
59 #define VPRINTK(fmt, args...)
60 #endif /* ATA_DEBUG */
62 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
67 #define assert(expr) \
68 if(unlikely(!(expr))) { \
69 printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
70 #expr,__FILE__,__FUNCTION__,__LINE__); \
74 /* defines only for the constants which don't work well as enums */
75 #define ATA_TAG_POISON 0xfafbfcfdU
77 /* move to PCI layer? */
78 static inline struct device
*pci_dev_to_dev(struct pci_dev
*pdev
)
84 /* various global constants */
85 LIBATA_MAX_PRD
= ATA_MAX_PRD
/ 2,
89 ATA_MAX_SECTORS
= 200, /* FIXME */
91 ATA_DEF_BUSY_WAIT
= 10000,
92 ATA_SHORT_PAUSE
= (HZ
>> 6) + 1,
95 ATA_SHT_CMD_PER_LUN
= 1,
97 ATA_SHT_USE_CLUSTERING
= 1,
99 /* struct ata_device stuff */
100 ATA_DFLAG_LBA48
= (1 << 0), /* device supports LBA48 */
101 ATA_DFLAG_PIO
= (1 << 1), /* device currently in PIO mode */
102 ATA_DFLAG_LOCK_SECTORS
= (1 << 2), /* don't adjust max_sectors */
103 ATA_DFLAG_LBA
= (1 << 3), /* device supports LBA */
105 ATA_DEV_UNKNOWN
= 0, /* unknown device */
106 ATA_DEV_ATA
= 1, /* ATA device */
107 ATA_DEV_ATA_UNSUP
= 2, /* ATA device (unsupported) */
108 ATA_DEV_ATAPI
= 3, /* ATAPI device */
109 ATA_DEV_ATAPI_UNSUP
= 4, /* ATAPI device (unsupported) */
110 ATA_DEV_NONE
= 5, /* no device */
112 /* struct ata_port flags */
113 ATA_FLAG_SLAVE_POSS
= (1 << 1), /* host supports slave dev */
114 /* (doesn't imply presence) */
115 ATA_FLAG_PORT_DISABLED
= (1 << 2), /* port is disabled, ignore it */
116 ATA_FLAG_SATA
= (1 << 3),
117 ATA_FLAG_NO_LEGACY
= (1 << 4), /* no legacy mode check */
118 ATA_FLAG_SRST
= (1 << 5), /* use ATA SRST, not E.D.D. */
119 ATA_FLAG_MMIO
= (1 << 6), /* use MMIO, not PIO */
120 ATA_FLAG_SATA_RESET
= (1 << 7), /* use COMRESET */
121 ATA_FLAG_PIO_DMA
= (1 << 8), /* PIO cmds via DMA */
122 ATA_FLAG_NOINTR
= (1 << 9), /* FIXME: Remove this once
123 * proper HSM is in place. */
124 ATA_FLAG_DEBUGMSG
= (1 << 10),
126 ATA_QCFLAG_ACTIVE
= (1 << 1), /* cmd not yet ack'd to scsi lyer */
127 ATA_QCFLAG_SG
= (1 << 3), /* have s/g table? */
128 ATA_QCFLAG_SINGLE
= (1 << 4), /* no s/g, just a single buffer */
129 ATA_QCFLAG_DMAMAP
= ATA_QCFLAG_SG
| ATA_QCFLAG_SINGLE
,
131 /* various lengths of time */
132 ATA_TMOUT_EDD
= 5 * HZ
, /* hueristic */
133 ATA_TMOUT_PIO
= 30 * HZ
,
134 ATA_TMOUT_BOOT
= 30 * HZ
, /* hueristic */
135 ATA_TMOUT_BOOT_QUICK
= 7 * HZ
, /* hueristic */
136 ATA_TMOUT_CDB
= 30 * HZ
,
137 ATA_TMOUT_CDB_QUICK
= 5 * HZ
,
151 /* SATA port states */
156 /* encoding various smaller bitmaps into a single
157 * unsigned long bitmap
163 /* size of buffer to pad xfers ending on unaligned boundaries */
165 ATA_DMA_PAD_BUF_SZ
= ATA_DMA_PAD_SZ
* ATA_MAX_QUEUE
,
167 /* Masks for port functions */
168 ATA_PORT_PRIMARY
= (1 << 0),
169 ATA_PORT_SECONDARY
= (1 << 1),
172 enum hsm_task_states
{
183 enum ata_completion_errors
{
184 AC_ERR_OTHER
= (1 << 0),
185 AC_ERR_DEV
= (1 << 1),
186 AC_ERR_ATA_BUS
= (1 << 2),
187 AC_ERR_HOST_BUS
= (1 << 3),
190 /* forward declarations */
192 struct ata_port_operations
;
194 struct ata_queued_cmd
;
197 typedef int (*ata_qc_cb_t
) (struct ata_queued_cmd
*qc
, unsigned int err_mask
);
200 unsigned long cmd_addr
;
201 unsigned long data_addr
;
202 unsigned long error_addr
;
203 unsigned long feature_addr
;
204 unsigned long nsect_addr
;
205 unsigned long lbal_addr
;
206 unsigned long lbam_addr
;
207 unsigned long lbah_addr
;
208 unsigned long device_addr
;
209 unsigned long status_addr
;
210 unsigned long command_addr
;
211 unsigned long altstatus_addr
;
212 unsigned long ctl_addr
;
213 unsigned long bmdma_addr
;
214 unsigned long scr_addr
;
217 struct ata_probe_ent
{
218 struct list_head node
;
220 const struct ata_port_operations
*port_ops
;
221 struct scsi_host_template
*sht
;
222 struct ata_ioports port
[ATA_MAX_PORTS
];
223 unsigned int n_ports
;
224 unsigned int hard_port_no
;
225 unsigned int pio_mask
;
226 unsigned int mwdma_mask
;
227 unsigned int udma_mask
;
228 unsigned int legacy_mode
;
230 unsigned int irq_flags
;
231 unsigned long host_flags
;
232 void __iomem
*mmio_base
;
236 struct ata_host_set
{
240 void __iomem
*mmio_base
;
241 unsigned int n_ports
;
243 const struct ata_port_operations
*ops
;
244 struct ata_port
* ports
[0];
247 struct ata_queued_cmd
{
249 struct ata_device
*dev
;
251 struct scsi_cmnd
*scsicmd
;
252 void (*scsidone
)(struct scsi_cmnd
*);
254 struct ata_taskfile tf
;
255 u8 cdb
[ATAPI_CDB_LEN
];
257 unsigned long flags
; /* ATA_QCFLAG_xxx */
260 unsigned int orig_n_elem
;
264 unsigned int pad_len
;
267 unsigned int cursect
;
270 unsigned int curbytes
;
273 unsigned int cursg_ofs
;
275 struct scatterlist sgent
;
276 struct scatterlist pad_sgent
;
279 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
280 struct scatterlist
*__sg
;
282 ata_qc_cb_t complete_fn
;
284 struct completion
*waiting
;
289 struct ata_host_stats
{
290 unsigned long unhandled_irq
;
291 unsigned long idle_irq
;
292 unsigned long rw_reqbuf
;
296 u64 n_sectors
; /* size of device, if ATA */
297 unsigned long flags
; /* ATA_DFLAG_xxx */
298 unsigned int class; /* ATA_DEV_xxx */
299 unsigned int devno
; /* 0 or 1 */
300 u16 id
[ATA_ID_WORDS
]; /* IDENTIFY xxx DEVICE data */
304 unsigned int xfer_shift
; /* ATA_SHIFT_xxx */
306 unsigned int multi_count
; /* sectors count for
307 READ/WRITE MULTIPLE */
309 /* for CHS addressing */
310 u16 cylinders
; /* Number of cylinders */
311 u16 heads
; /* Number of heads */
312 u16 sectors
; /* Number of sectors per track */
316 struct Scsi_Host
*host
; /* our co-allocated scsi host */
317 const struct ata_port_operations
*ops
;
318 unsigned long flags
; /* ATA_FLAG_xxx */
319 unsigned int id
; /* unique id req'd by scsi midlyr */
320 unsigned int port_no
; /* unique port #; from zero */
321 unsigned int hard_port_no
; /* hardware port #; from zero */
323 struct ata_prd
*prd
; /* our SG list */
324 dma_addr_t prd_dma
; /* and its DMA mapping */
326 void *pad
; /* array of DMA pad buffers */
329 struct ata_ioports ioaddr
; /* ATA cmd/ctl/dma register blocks */
331 u8 ctl
; /* cache of ATA control register */
332 u8 last_ctl
; /* Cache last written value */
333 unsigned int bus_state
;
334 unsigned int port_state
;
335 unsigned int pio_mask
;
336 unsigned int mwdma_mask
;
337 unsigned int udma_mask
;
338 unsigned int cbl
; /* cable type; ATA_CBL_xxx */
339 unsigned int cdb_len
;
341 struct ata_device device
[ATA_MAX_DEVICES
];
343 struct ata_queued_cmd qcmd
[ATA_MAX_QUEUE
];
344 unsigned long qactive
;
345 unsigned int active_tag
;
347 struct ata_host_stats stats
;
348 struct ata_host_set
*host_set
;
350 struct work_struct packet_task
;
352 struct work_struct pio_task
;
353 unsigned int hsm_task_state
;
354 unsigned long pio_task_timeout
;
359 struct ata_port_operations
{
360 void (*port_disable
) (struct ata_port
*);
362 void (*dev_config
) (struct ata_port
*, struct ata_device
*);
364 void (*set_piomode
) (struct ata_port
*, struct ata_device
*);
365 void (*set_dmamode
) (struct ata_port
*, struct ata_device
*);
367 void (*tf_load
) (struct ata_port
*ap
, const struct ata_taskfile
*tf
);
368 void (*tf_read
) (struct ata_port
*ap
, struct ata_taskfile
*tf
);
370 void (*exec_command
)(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
371 u8 (*check_status
)(struct ata_port
*ap
);
372 u8 (*check_altstatus
)(struct ata_port
*ap
);
373 void (*dev_select
)(struct ata_port
*ap
, unsigned int device
);
375 void (*phy_reset
) (struct ata_port
*ap
);
376 void (*post_set_mode
) (struct ata_port
*ap
);
378 int (*check_atapi_dma
) (struct ata_queued_cmd
*qc
);
380 void (*bmdma_setup
) (struct ata_queued_cmd
*qc
);
381 void (*bmdma_start
) (struct ata_queued_cmd
*qc
);
383 void (*qc_prep
) (struct ata_queued_cmd
*qc
);
384 int (*qc_issue
) (struct ata_queued_cmd
*qc
);
386 void (*eng_timeout
) (struct ata_port
*ap
);
388 irqreturn_t (*irq_handler
)(int, void *, struct pt_regs
*);
389 void (*irq_clear
) (struct ata_port
*);
391 u32 (*scr_read
) (struct ata_port
*ap
, unsigned int sc_reg
);
392 void (*scr_write
) (struct ata_port
*ap
, unsigned int sc_reg
,
395 int (*port_start
) (struct ata_port
*ap
);
396 void (*port_stop
) (struct ata_port
*ap
);
398 void (*host_stop
) (struct ata_host_set
*host_set
);
400 void (*bmdma_stop
) (struct ata_queued_cmd
*qc
);
401 u8 (*bmdma_status
) (struct ata_port
*ap
);
404 struct ata_port_info
{
405 struct scsi_host_template
*sht
;
406 unsigned long host_flags
;
407 unsigned long pio_mask
;
408 unsigned long mwdma_mask
;
409 unsigned long udma_mask
;
410 const struct ata_port_operations
*port_ops
;
415 unsigned short mode
; /* ATA mode */
416 unsigned short setup
; /* t1 */
417 unsigned short act8b
; /* t2 for 8-bit I/O */
418 unsigned short rec8b
; /* t2i for 8-bit I/O */
419 unsigned short cyc8b
; /* t0 for 8-bit I/O */
420 unsigned short active
; /* t2 or tD */
421 unsigned short recover
; /* t2i or tK */
422 unsigned short cycle
; /* t0 */
423 unsigned short udma
; /* t2CYCTYP/2 */
426 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
428 extern void ata_port_probe(struct ata_port
*);
429 extern void __sata_phy_reset(struct ata_port
*ap
);
430 extern void sata_phy_reset(struct ata_port
*ap
);
431 extern void ata_bus_reset(struct ata_port
*ap
);
432 extern void ata_port_disable(struct ata_port
*);
433 extern void ata_std_ports(struct ata_ioports
*ioaddr
);
435 extern int ata_pci_init_one (struct pci_dev
*pdev
, struct ata_port_info
**port_info
,
436 unsigned int n_ports
);
437 extern void ata_pci_remove_one (struct pci_dev
*pdev
);
438 #endif /* CONFIG_PCI */
439 extern int ata_device_add(const struct ata_probe_ent
*ent
);
440 extern void ata_host_set_remove(struct ata_host_set
*host_set
);
441 extern int ata_scsi_detect(struct scsi_host_template
*sht
);
442 extern int ata_scsi_ioctl(struct scsi_device
*dev
, int cmd
, void __user
*arg
);
443 extern int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*));
444 extern int ata_scsi_error(struct Scsi_Host
*host
);
445 extern int ata_scsi_release(struct Scsi_Host
*host
);
446 extern unsigned int ata_host_intr(struct ata_port
*ap
, struct ata_queued_cmd
*qc
);
447 extern int ata_ratelimit(void);
450 * Default driver ops implementations
452 extern void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
453 extern void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
);
454 extern void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
);
455 extern void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
);
456 extern void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
);
457 extern void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
);
458 extern u8
ata_check_status(struct ata_port
*ap
);
459 extern u8
ata_altstatus(struct ata_port
*ap
);
460 extern void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
461 extern int ata_port_start (struct ata_port
*ap
);
462 extern void ata_port_stop (struct ata_port
*ap
);
463 extern void ata_host_stop (struct ata_host_set
*host_set
);
464 extern irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
);
465 extern void ata_qc_prep(struct ata_queued_cmd
*qc
);
466 extern int ata_qc_issue_prot(struct ata_queued_cmd
*qc
);
467 extern void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
,
468 unsigned int buflen
);
469 extern void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
470 unsigned int n_elem
);
471 extern unsigned int ata_dev_classify(const struct ata_taskfile
*tf
);
472 extern void ata_dev_id_string(const u16
*id
, unsigned char *s
,
473 unsigned int ofs
, unsigned int len
);
474 extern void ata_dev_config(struct ata_port
*ap
, unsigned int i
);
475 extern void ata_bmdma_setup (struct ata_queued_cmd
*qc
);
476 extern void ata_bmdma_start (struct ata_queued_cmd
*qc
);
477 extern void ata_bmdma_stop(struct ata_queued_cmd
*qc
);
478 extern u8
ata_bmdma_status(struct ata_port
*ap
);
479 extern void ata_bmdma_irq_clear(struct ata_port
*ap
);
480 extern void ata_qc_complete(struct ata_queued_cmd
*qc
, unsigned int err_mask
);
481 extern void ata_eng_timeout(struct ata_port
*ap
);
482 extern void ata_scsi_simulate(u16
*id
, struct scsi_cmnd
*cmd
,
483 void (*done
)(struct scsi_cmnd
*));
484 extern int ata_std_bios_param(struct scsi_device
*sdev
,
485 struct block_device
*bdev
,
486 sector_t capacity
, int geom
[]);
487 extern int ata_scsi_slave_config(struct scsi_device
*sdev
);
492 extern int ata_timing_compute(struct ata_device
*, unsigned short,
493 struct ata_timing
*, int, int);
494 extern void ata_timing_merge(const struct ata_timing
*,
495 const struct ata_timing
*, struct ata_timing
*,
499 ATA_TIMING_SETUP
= (1 << 0),
500 ATA_TIMING_ACT8B
= (1 << 1),
501 ATA_TIMING_REC8B
= (1 << 2),
502 ATA_TIMING_CYC8B
= (1 << 3),
503 ATA_TIMING_8BIT
= ATA_TIMING_ACT8B
| ATA_TIMING_REC8B
|
505 ATA_TIMING_ACTIVE
= (1 << 4),
506 ATA_TIMING_RECOVER
= (1 << 5),
507 ATA_TIMING_CYCLE
= (1 << 6),
508 ATA_TIMING_UDMA
= (1 << 7),
509 ATA_TIMING_ALL
= ATA_TIMING_SETUP
| ATA_TIMING_ACT8B
|
510 ATA_TIMING_REC8B
| ATA_TIMING_CYC8B
|
511 ATA_TIMING_ACTIVE
| ATA_TIMING_RECOVER
|
512 ATA_TIMING_CYCLE
| ATA_TIMING_UDMA
,
518 unsigned int reg
; /* PCI config register to read */
519 unsigned int width
; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
524 extern void ata_pci_host_stop (struct ata_host_set
*host_set
);
525 extern struct ata_probe_ent
*
526 ata_pci_init_native_mode(struct pci_dev
*pdev
, struct ata_port_info
**port
, int portmask
);
527 extern int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
);
529 #endif /* CONFIG_PCI */
533 ata_sg_is_last(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
535 if (sg
== &qc
->pad_sgent
)
539 if (((sg
- qc
->__sg
) + 1) == qc
->n_elem
)
544 static inline struct scatterlist
*
545 ata_qc_next_sg(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
547 if (sg
== &qc
->pad_sgent
)
549 if (++sg
- qc
->__sg
< qc
->n_elem
)
551 return qc
->pad_len
? &qc
->pad_sgent
: NULL
;
554 #define ata_for_each_sg(sg, qc) \
555 for (sg = qc->__sg; sg; sg = ata_qc_next_sg(sg, qc))
557 static inline unsigned int ata_tag_valid(unsigned int tag
)
559 return (tag
< ATA_MAX_QUEUE
) ? 1 : 0;
562 static inline unsigned int ata_dev_present(const struct ata_device
*dev
)
564 return ((dev
->class == ATA_DEV_ATA
) ||
565 (dev
->class == ATA_DEV_ATAPI
));
568 static inline u8
ata_chk_status(struct ata_port
*ap
)
570 return ap
->ops
->check_status(ap
);
575 * ata_pause - Flush writes and pause 400 nanoseconds.
576 * @ap: Port to wait for.
579 * Inherited from caller.
582 static inline void ata_pause(struct ata_port
*ap
)
590 * ata_busy_wait - Wait for a port status register
591 * @ap: Port to wait for.
593 * Waits up to max*10 microseconds for the selected bits in the port's
594 * status register to be cleared.
595 * Returns final value of status register.
598 * Inherited from caller.
601 static inline u8
ata_busy_wait(struct ata_port
*ap
, unsigned int bits
,
608 status
= ata_chk_status(ap
);
610 } while ((status
& bits
) && (max
> 0));
617 * ata_wait_idle - Wait for a port to be idle.
618 * @ap: Port to wait for.
620 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
621 * Returns final value of status register.
624 * Inherited from caller.
627 static inline u8
ata_wait_idle(struct ata_port
*ap
)
629 u8 status
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 1000);
631 if (status
& (ATA_BUSY
| ATA_DRQ
)) {
632 unsigned long l
= ap
->ioaddr
.status_addr
;
634 "ATA: abnormal status 0x%X on port 0x%lX\n",
641 static inline void ata_qc_set_polling(struct ata_queued_cmd
*qc
)
643 qc
->tf
.ctl
|= ATA_NIEN
;
646 static inline struct ata_queued_cmd
*ata_qc_from_tag (struct ata_port
*ap
,
649 if (likely(ata_tag_valid(tag
)))
650 return &ap
->qcmd
[tag
];
654 static inline void ata_tf_init(struct ata_port
*ap
, struct ata_taskfile
*tf
, unsigned int device
)
656 memset(tf
, 0, sizeof(*tf
));
660 tf
->device
= ATA_DEVICE_OBS
;
662 tf
->device
= ATA_DEVICE_OBS
| ATA_DEV1
;
665 static inline void ata_qc_reinit(struct ata_queued_cmd
*qc
)
669 qc
->cursect
= qc
->cursg
= qc
->cursg_ofs
= 0;
671 qc
->nbytes
= qc
->curbytes
= 0;
673 ata_tf_init(qc
->ap
, &qc
->tf
, qc
->dev
->devno
);
678 * ata_irq_on - Enable interrupts on a port.
679 * @ap: Port on which interrupts are enabled.
681 * Enable interrupts on a legacy IDE device using MMIO or PIO,
682 * wait for idle, clear any pending interrupts.
685 * Inherited from caller.
688 static inline u8
ata_irq_on(struct ata_port
*ap
)
690 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
693 ap
->ctl
&= ~ATA_NIEN
;
694 ap
->last_ctl
= ap
->ctl
;
696 if (ap
->flags
& ATA_FLAG_MMIO
)
697 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
699 outb(ap
->ctl
, ioaddr
->ctl_addr
);
700 tmp
= ata_wait_idle(ap
);
702 ap
->ops
->irq_clear(ap
);
709 * ata_irq_ack - Acknowledge a device interrupt.
710 * @ap: Port on which interrupts are enabled.
712 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
713 * or BUSY+DRQ clear). Obtain dma status and port status from
714 * device. Clear the interrupt. Return port status.
719 static inline u8
ata_irq_ack(struct ata_port
*ap
, unsigned int chk_drq
)
721 unsigned int bits
= chk_drq
? ATA_BUSY
| ATA_DRQ
: ATA_BUSY
;
722 u8 host_stat
, post_stat
, status
;
724 status
= ata_busy_wait(ap
, bits
, 1000);
726 DPRINTK("abnormal status 0x%X\n", status
);
728 /* get controller status; clear intr, err bits */
729 if (ap
->flags
& ATA_FLAG_MMIO
) {
730 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
731 host_stat
= readb(mmio
+ ATA_DMA_STATUS
);
732 writeb(host_stat
| ATA_DMA_INTR
| ATA_DMA_ERR
,
733 mmio
+ ATA_DMA_STATUS
);
735 post_stat
= readb(mmio
+ ATA_DMA_STATUS
);
737 host_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
738 outb(host_stat
| ATA_DMA_INTR
| ATA_DMA_ERR
,
739 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
741 post_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
744 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
745 host_stat
, post_stat
, status
);
750 static inline u32
scr_read(struct ata_port
*ap
, unsigned int reg
)
752 return ap
->ops
->scr_read(ap
, reg
);
755 static inline void scr_write(struct ata_port
*ap
, unsigned int reg
, u32 val
)
757 ap
->ops
->scr_write(ap
, reg
, val
);
760 static inline void scr_write_flush(struct ata_port
*ap
, unsigned int reg
,
763 ap
->ops
->scr_write(ap
, reg
, val
);
764 (void) ap
->ops
->scr_read(ap
, reg
);
767 static inline unsigned int sata_dev_present(struct ata_port
*ap
)
769 return ((scr_read(ap
, SCR_STATUS
) & 0xf) == 0x3) ? 1 : 0;
772 static inline int ata_try_flush_cache(const struct ata_device
*dev
)
774 return ata_id_wcache_enabled(dev
->id
) ||
775 ata_id_has_flush(dev
->id
) ||
776 ata_id_has_flush_ext(dev
->id
);
779 static inline unsigned int ac_err_mask(u8 status
)
781 if (status
& ATA_BUSY
)
782 return AC_ERR_ATA_BUS
;
783 if (status
& (ATA_ERR
| ATA_DF
))
788 static inline unsigned int __ac_err_mask(u8 status
)
790 unsigned int mask
= ac_err_mask(status
);
796 static inline int ata_pad_alloc(struct ata_port
*ap
, struct device
*dev
)
799 ap
->pad
= dma_alloc_coherent(dev
, ATA_DMA_PAD_BUF_SZ
,
800 &ap
->pad_dma
, GFP_KERNEL
);
801 return (ap
->pad
== NULL
) ? -ENOMEM
: 0;
804 static inline void ata_pad_free(struct ata_port
*ap
, struct device
*dev
)
806 dma_free_coherent(dev
, ATA_DMA_PAD_BUF_SZ
, ap
->pad
, ap
->pad_dma
);
809 #endif /* __LINUX_LIBATA_H__ */