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>
36 #include <scsi/scsi_host.h>
39 * compile-time options: to be removed as soon as all the drivers are
40 * converted to the new debugging mechanism
42 #undef ATA_DEBUG /* debugging output */
43 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
44 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
45 #undef ATA_NDEBUG /* define to disable quick runtime checks */
46 #undef ATA_ENABLE_PATA /* define to enable PATA support in some
47 * low-level drivers */
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)
65 /* NEW: debug levels */
66 #define HAVE_LIBATA_MSG 1
70 ATA_MSG_INFO
= 0x0002,
71 ATA_MSG_PROBE
= 0x0004,
72 ATA_MSG_WARN
= 0x0008,
73 ATA_MSG_MALLOC
= 0x0010,
75 ATA_MSG_INTR
= 0x0040,
79 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
80 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
81 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
82 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
83 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
84 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
85 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
86 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
88 static inline u32
ata_msg_init(int dval
, int default_msg_enable_bits
)
90 if (dval
< 0 || dval
>= (sizeof(u32
) * 8))
91 return default_msg_enable_bits
; /* should be 0x1 - only driver info msgs */
94 return (1 << dval
) - 1;
97 /* defines only for the constants which don't work well as enums */
98 #define ATA_TAG_POISON 0xfafbfcfdU
100 /* move to PCI layer? */
101 static inline struct device
*pci_dev_to_dev(struct pci_dev
*pdev
)
107 /* various global constants */
108 LIBATA_MAX_PRD
= ATA_MAX_PRD
/ 2,
111 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
113 ATA_TAG_INTERNAL
= ATA_MAX_QUEUE
- 1,
114 ATA_MAX_SECTORS
= 200, /* FIXME */
115 ATA_MAX_SECTORS_LBA48
= 65535,
117 ATA_DEF_BUSY_WAIT
= 10000,
118 ATA_SHORT_PAUSE
= (HZ
>> 6) + 1,
120 ATA_SHT_EMULATED
= 1,
121 ATA_SHT_CMD_PER_LUN
= 1,
122 ATA_SHT_THIS_ID
= -1,
123 ATA_SHT_USE_CLUSTERING
= 1,
125 /* struct ata_device stuff */
126 ATA_DFLAG_LBA
= (1 << 0), /* device supports LBA */
127 ATA_DFLAG_LBA48
= (1 << 1), /* device supports LBA48 */
128 ATA_DFLAG_CDB_INTR
= (1 << 2), /* device asserts INTRQ when ready for CDB */
129 ATA_DFLAG_NCQ
= (1 << 3), /* device supports NCQ */
130 ATA_DFLAG_CFG_MASK
= (1 << 8) - 1,
132 ATA_DFLAG_PIO
= (1 << 8), /* device currently in PIO mode */
134 ATA_DEV_UNKNOWN
= 0, /* unknown device */
135 ATA_DEV_ATA
= 1, /* ATA device */
136 ATA_DEV_ATA_UNSUP
= 2, /* ATA device (unsupported) */
137 ATA_DEV_ATAPI
= 3, /* ATAPI device */
138 ATA_DEV_ATAPI_UNSUP
= 4, /* ATAPI device (unsupported) */
139 ATA_DEV_NONE
= 5, /* no device */
141 /* struct ata_port flags */
142 ATA_FLAG_SLAVE_POSS
= (1 << 0), /* host supports slave dev */
143 /* (doesn't imply presence) */
144 ATA_FLAG_SATA
= (1 << 1),
145 ATA_FLAG_NO_LEGACY
= (1 << 2), /* no legacy mode check */
146 ATA_FLAG_MMIO
= (1 << 3), /* use MMIO, not PIO */
147 ATA_FLAG_SRST
= (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
148 ATA_FLAG_SATA_RESET
= (1 << 5), /* (obsolete) use COMRESET */
149 ATA_FLAG_NO_ATAPI
= (1 << 6), /* No ATAPI support */
150 ATA_FLAG_PIO_DMA
= (1 << 7), /* PIO cmds via DMA */
151 ATA_FLAG_PIO_LBA48
= (1 << 8), /* Host DMA engine is LBA28 only */
152 ATA_FLAG_PIO_POLLING
= (1 << 9), /* use polling PIO if LLD
153 * doesn't handle PIO interrupts */
154 ATA_FLAG_NCQ
= (1 << 10), /* host supports NCQ */
156 ATA_FLAG_DEBUGMSG
= (1 << 13),
157 ATA_FLAG_FLUSH_PORT_TASK
= (1 << 14), /* flush port task */
159 ATA_FLAG_EH_PENDING
= (1 << 15), /* EH pending */
160 ATA_FLAG_FROZEN
= (1 << 17), /* port is frozen */
161 ATA_FLAG_RECOVERED
= (1 << 18), /* recovery action performed */
163 ATA_FLAG_DISABLED
= (1 << 22), /* port is disabled, ignore it */
164 ATA_FLAG_SUSPENDED
= (1 << 23), /* port is suspended (power) */
166 /* bits 24:31 of ap->flags are reserved for LLDD specific flags */
168 /* struct ata_queued_cmd flags */
169 ATA_QCFLAG_ACTIVE
= (1 << 0), /* cmd not yet ack'd to scsi lyer */
170 ATA_QCFLAG_SG
= (1 << 1), /* have s/g table? */
171 ATA_QCFLAG_SINGLE
= (1 << 2), /* no s/g, just a single buffer */
172 ATA_QCFLAG_DMAMAP
= ATA_QCFLAG_SG
| ATA_QCFLAG_SINGLE
,
173 ATA_QCFLAG_IO
= (1 << 3), /* standard IO command */
174 ATA_QCFLAG_RESULT_TF
= (1 << 4), /* result TF requested */
176 ATA_QCFLAG_FAILED
= (1 << 16), /* cmd failed and is owned by EH */
177 ATA_QCFLAG_SENSE_VALID
= (1 << 17), /* sense data valid */
178 ATA_QCFLAG_EH_SCHEDULED
= (1 << 18), /* EH scheduled (obsolete) */
181 ATA_HOST_SIMPLEX
= (1 << 0), /* Host is simplex, one DMA channel per host_set only */
183 /* various lengths of time */
184 ATA_TMOUT_BOOT
= 30 * HZ
, /* heuristic */
185 ATA_TMOUT_BOOT_QUICK
= 7 * HZ
, /* heuristic */
186 ATA_TMOUT_INTERNAL
= 30 * HZ
,
187 ATA_TMOUT_INTERNAL_QUICK
= 5 * HZ
,
201 /* SATA port states */
206 /* encoding various smaller bitmaps into a single
207 * unsigned int bitmap
214 ATA_SHIFT_MWDMA
= ATA_SHIFT_PIO
+ ATA_BITS_PIO
,
215 ATA_SHIFT_UDMA
= ATA_SHIFT_MWDMA
+ ATA_BITS_MWDMA
,
217 ATA_MASK_PIO
= ((1 << ATA_BITS_PIO
) - 1) << ATA_SHIFT_PIO
,
218 ATA_MASK_MWDMA
= ((1 << ATA_BITS_MWDMA
) - 1) << ATA_SHIFT_MWDMA
,
219 ATA_MASK_UDMA
= ((1 << ATA_BITS_UDMA
) - 1) << ATA_SHIFT_UDMA
,
221 /* size of buffer to pad xfers ending on unaligned boundaries */
223 ATA_DMA_PAD_BUF_SZ
= ATA_DMA_PAD_SZ
* ATA_MAX_QUEUE
,
225 /* masks for port functions */
226 ATA_PORT_PRIMARY
= (1 << 0),
227 ATA_PORT_SECONDARY
= (1 << 1),
232 /* desc_len for ata_eh_info and context */
233 ATA_EH_DESC_LEN
= 80,
235 /* reset / recovery action types */
236 ATA_EH_REVALIDATE
= (1 << 0),
237 ATA_EH_SOFTRESET
= (1 << 1),
238 ATA_EH_HARDRESET
= (1 << 2),
240 ATA_EH_RESET_MASK
= ATA_EH_SOFTRESET
| ATA_EH_HARDRESET
,
242 /* ata_eh_info->flags */
243 ATA_EHI_DID_RESET
= (1 << 0), /* already reset this port */
245 /* max repeat if error condition is still set after ->error_handler */
246 ATA_EH_MAX_REPEAT
= 5,
248 /* how hard are we gonna try to probe/recover devices */
249 ATA_PROBE_MAX_TRIES
= 3,
250 ATA_EH_RESET_TRIES
= 3,
251 ATA_EH_DEV_TRIES
= 3,
254 enum hsm_task_states
{
255 HSM_ST_UNKNOWN
, /* state unknown */
256 HSM_ST_IDLE
, /* no command on going */
257 HSM_ST
, /* (waiting the device to) transfer data */
258 HSM_ST_LAST
, /* (waiting the device to) complete command */
259 HSM_ST_ERR
, /* error */
260 HSM_ST_FIRST
, /* (waiting the device to)
261 write CDB or first data block */
264 enum ata_completion_errors
{
265 AC_ERR_DEV
= (1 << 0), /* device reported error */
266 AC_ERR_HSM
= (1 << 1), /* host state machine violation */
267 AC_ERR_TIMEOUT
= (1 << 2), /* timeout */
268 AC_ERR_MEDIA
= (1 << 3), /* media error */
269 AC_ERR_ATA_BUS
= (1 << 4), /* ATA bus error */
270 AC_ERR_HOST_BUS
= (1 << 5), /* host bus error */
271 AC_ERR_SYSTEM
= (1 << 6), /* system error */
272 AC_ERR_INVALID
= (1 << 7), /* invalid argument */
273 AC_ERR_OTHER
= (1 << 8), /* unknown */
276 /* forward declarations */
278 struct ata_port_operations
;
280 struct ata_queued_cmd
;
283 typedef void (*ata_qc_cb_t
) (struct ata_queued_cmd
*qc
);
284 typedef void (*ata_probeinit_fn_t
)(struct ata_port
*);
285 typedef int (*ata_reset_fn_t
)(struct ata_port
*, unsigned int *);
286 typedef void (*ata_postreset_fn_t
)(struct ata_port
*ap
, unsigned int *);
289 unsigned long cmd_addr
;
290 unsigned long data_addr
;
291 unsigned long error_addr
;
292 unsigned long feature_addr
;
293 unsigned long nsect_addr
;
294 unsigned long lbal_addr
;
295 unsigned long lbam_addr
;
296 unsigned long lbah_addr
;
297 unsigned long device_addr
;
298 unsigned long status_addr
;
299 unsigned long command_addr
;
300 unsigned long altstatus_addr
;
301 unsigned long ctl_addr
;
302 unsigned long bmdma_addr
;
303 unsigned long scr_addr
;
306 struct ata_probe_ent
{
307 struct list_head node
;
309 const struct ata_port_operations
*port_ops
;
310 struct scsi_host_template
*sht
;
311 struct ata_ioports port
[ATA_MAX_PORTS
];
312 unsigned int n_ports
;
313 unsigned int hard_port_no
;
314 unsigned int pio_mask
;
315 unsigned int mwdma_mask
;
316 unsigned int udma_mask
;
317 unsigned int legacy_mode
;
319 unsigned int irq_flags
;
320 unsigned long host_flags
;
321 unsigned long host_set_flags
;
322 void __iomem
*mmio_base
;
326 struct ata_host_set
{
330 void __iomem
*mmio_base
;
331 unsigned int n_ports
;
333 const struct ata_port_operations
*ops
;
335 int simplex_claimed
; /* Keep seperate in case we
336 ever need to do this locked */
337 struct ata_port
* ports
[0];
340 struct ata_queued_cmd
{
342 struct ata_device
*dev
;
344 struct scsi_cmnd
*scsicmd
;
345 void (*scsidone
)(struct scsi_cmnd
*);
347 struct ata_taskfile tf
;
348 u8 cdb
[ATAPI_CDB_LEN
];
350 unsigned long flags
; /* ATA_QCFLAG_xxx */
353 unsigned int orig_n_elem
;
357 unsigned int pad_len
;
360 unsigned int cursect
;
363 unsigned int curbytes
;
366 unsigned int cursg_ofs
;
368 struct scatterlist sgent
;
369 struct scatterlist pad_sgent
;
372 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
373 struct scatterlist
*__sg
;
375 unsigned int err_mask
;
376 struct ata_taskfile result_tf
;
377 ata_qc_cb_t complete_fn
;
382 struct ata_host_stats
{
383 unsigned long unhandled_irq
;
384 unsigned long idle_irq
;
385 unsigned long rw_reqbuf
;
388 struct ata_ering_entry
{
390 unsigned int err_mask
;
396 struct ata_ering_entry ring
[ATA_ERING_SIZE
];
401 u64 n_sectors
; /* size of device, if ATA */
402 unsigned long flags
; /* ATA_DFLAG_xxx */
403 unsigned int class; /* ATA_DEV_xxx */
404 unsigned int devno
; /* 0 or 1 */
405 u16 id
[ATA_ID_WORDS
]; /* IDENTIFY xxx DEVICE data */
409 unsigned int xfer_shift
; /* ATA_SHIFT_xxx */
411 unsigned int multi_count
; /* sectors count for
412 READ/WRITE MULTIPLE */
413 unsigned int max_sectors
; /* per-device max sectors */
414 unsigned int cdb_len
;
416 /* per-dev xfer mask */
417 unsigned int pio_mask
;
418 unsigned int mwdma_mask
;
419 unsigned int udma_mask
;
421 /* for CHS addressing */
422 u16 cylinders
; /* Number of cylinders */
423 u16 heads
; /* Number of heads */
424 u16 sectors
; /* Number of sectors per track */
427 struct ata_ering ering
;
431 struct ata_device
*dev
; /* offending device */
432 u32 serror
; /* SError from LLDD */
433 unsigned int err_mask
; /* port-wide err_mask */
434 unsigned int action
; /* ATA_EH_* action mask */
435 unsigned int flags
; /* ATA_EHI_* flags */
436 char desc
[ATA_EH_DESC_LEN
];
440 struct ata_eh_context
{
441 struct ata_eh_info i
;
442 int tries
[ATA_MAX_DEVICES
];
446 struct Scsi_Host
*host
; /* our co-allocated scsi host */
447 const struct ata_port_operations
*ops
;
448 unsigned long flags
; /* ATA_FLAG_xxx */
449 unsigned int id
; /* unique id req'd by scsi midlyr */
450 unsigned int port_no
; /* unique port #; from zero */
451 unsigned int hard_port_no
; /* hardware port #; from zero */
453 struct ata_prd
*prd
; /* our SG list */
454 dma_addr_t prd_dma
; /* and its DMA mapping */
456 void *pad
; /* array of DMA pad buffers */
459 struct ata_ioports ioaddr
; /* ATA cmd/ctl/dma register blocks */
461 u8 ctl
; /* cache of ATA control register */
462 u8 last_ctl
; /* Cache last written value */
463 unsigned int pio_mask
;
464 unsigned int mwdma_mask
;
465 unsigned int udma_mask
;
466 unsigned int cbl
; /* cable type; ATA_CBL_xxx */
467 unsigned int sata_spd_limit
; /* SATA PHY speed limit */
469 /* record runtime error info, protected by host_set lock */
470 struct ata_eh_info eh_info
;
471 /* EH context owned by EH */
472 struct ata_eh_context eh_context
;
474 struct ata_device device
[ATA_MAX_DEVICES
];
476 struct ata_queued_cmd qcmd
[ATA_MAX_QUEUE
];
477 unsigned long qc_allocated
;
478 unsigned int qc_active
;
480 unsigned int active_tag
;
483 struct ata_host_stats stats
;
484 struct ata_host_set
*host_set
;
487 struct work_struct port_task
;
489 unsigned int hsm_task_state
;
492 struct list_head eh_done_q
;
496 u8 sector_buf
[ATA_SECT_SIZE
]; /* owned by EH */
499 struct ata_port_operations
{
500 void (*port_disable
) (struct ata_port
*);
502 void (*dev_config
) (struct ata_port
*, struct ata_device
*);
504 void (*set_piomode
) (struct ata_port
*, struct ata_device
*);
505 void (*set_dmamode
) (struct ata_port
*, struct ata_device
*);
506 unsigned long (*mode_filter
) (const struct ata_port
*, struct ata_device
*, unsigned long);
508 void (*tf_load
) (struct ata_port
*ap
, const struct ata_taskfile
*tf
);
509 void (*tf_read
) (struct ata_port
*ap
, struct ata_taskfile
*tf
);
511 void (*exec_command
)(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
512 u8 (*check_status
)(struct ata_port
*ap
);
513 u8 (*check_altstatus
)(struct ata_port
*ap
);
514 void (*dev_select
)(struct ata_port
*ap
, unsigned int device
);
516 void (*phy_reset
) (struct ata_port
*ap
); /* obsolete */
517 void (*set_mode
) (struct ata_port
*ap
);
518 int (*probe_reset
) (struct ata_port
*ap
, unsigned int *classes
);
520 void (*post_set_mode
) (struct ata_port
*ap
);
522 int (*check_atapi_dma
) (struct ata_queued_cmd
*qc
);
524 void (*bmdma_setup
) (struct ata_queued_cmd
*qc
);
525 void (*bmdma_start
) (struct ata_queued_cmd
*qc
);
527 void (*data_xfer
) (struct ata_device
*, unsigned char *, unsigned int, int);
529 void (*qc_prep
) (struct ata_queued_cmd
*qc
);
530 unsigned int (*qc_issue
) (struct ata_queued_cmd
*qc
);
532 /* Error handlers. ->error_handler overrides ->eng_timeout and
533 * indicates that new-style EH is in place.
535 void (*eng_timeout
) (struct ata_port
*ap
); /* obsolete */
537 void (*freeze
) (struct ata_port
*ap
);
538 void (*thaw
) (struct ata_port
*ap
);
539 void (*error_handler
) (struct ata_port
*ap
);
540 void (*post_internal_cmd
) (struct ata_queued_cmd
*qc
);
542 irqreturn_t (*irq_handler
)(int, void *, struct pt_regs
*);
543 void (*irq_clear
) (struct ata_port
*);
545 u32 (*scr_read
) (struct ata_port
*ap
, unsigned int sc_reg
);
546 void (*scr_write
) (struct ata_port
*ap
, unsigned int sc_reg
,
549 int (*port_start
) (struct ata_port
*ap
);
550 void (*port_stop
) (struct ata_port
*ap
);
552 void (*host_stop
) (struct ata_host_set
*host_set
);
554 void (*bmdma_stop
) (struct ata_queued_cmd
*qc
);
555 u8 (*bmdma_status
) (struct ata_port
*ap
);
558 struct ata_port_info
{
559 struct scsi_host_template
*sht
;
560 unsigned long host_flags
;
561 unsigned long pio_mask
;
562 unsigned long mwdma_mask
;
563 unsigned long udma_mask
;
564 const struct ata_port_operations
*port_ops
;
569 unsigned short mode
; /* ATA mode */
570 unsigned short setup
; /* t1 */
571 unsigned short act8b
; /* t2 for 8-bit I/O */
572 unsigned short rec8b
; /* t2i for 8-bit I/O */
573 unsigned short cyc8b
; /* t0 for 8-bit I/O */
574 unsigned short active
; /* t2 or tD */
575 unsigned short recover
; /* t2i or tK */
576 unsigned short cycle
; /* t0 */
577 unsigned short udma
; /* t2CYCTYP/2 */
580 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
582 extern void ata_port_probe(struct ata_port
*);
583 extern void __sata_phy_reset(struct ata_port
*ap
);
584 extern void sata_phy_reset(struct ata_port
*ap
);
585 extern void ata_bus_reset(struct ata_port
*ap
);
586 extern int sata_set_spd(struct ata_port
*ap
);
587 extern int ata_drive_probe_reset(struct ata_port
*ap
,
588 ata_probeinit_fn_t probeinit
,
589 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
590 ata_postreset_fn_t postreset
, unsigned int *classes
);
591 extern void ata_std_probeinit(struct ata_port
*ap
);
592 extern int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
);
593 extern int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class);
594 extern void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
);
595 extern int ata_dev_revalidate(struct ata_device
*dev
, int post_reset
);
596 extern void ata_port_disable(struct ata_port
*);
597 extern void ata_std_ports(struct ata_ioports
*ioaddr
);
599 extern int ata_pci_init_one (struct pci_dev
*pdev
, struct ata_port_info
**port_info
,
600 unsigned int n_ports
);
601 extern void ata_pci_remove_one (struct pci_dev
*pdev
);
602 extern int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
);
603 extern int ata_pci_device_resume(struct pci_dev
*pdev
);
604 extern int ata_pci_clear_simplex(struct pci_dev
*pdev
);
605 #endif /* CONFIG_PCI */
606 extern int ata_device_add(const struct ata_probe_ent
*ent
);
607 extern void ata_host_set_remove(struct ata_host_set
*host_set
);
608 extern int ata_scsi_detect(struct scsi_host_template
*sht
);
609 extern int ata_scsi_ioctl(struct scsi_device
*dev
, int cmd
, void __user
*arg
);
610 extern int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*));
611 extern int ata_scsi_release(struct Scsi_Host
*host
);
612 extern unsigned int ata_host_intr(struct ata_port
*ap
, struct ata_queued_cmd
*qc
);
613 extern int sata_scr_valid(struct ata_port
*ap
);
614 extern int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
);
615 extern int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
);
616 extern int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
);
617 extern int ata_port_online(struct ata_port
*ap
);
618 extern int ata_port_offline(struct ata_port
*ap
);
619 extern int ata_scsi_device_resume(struct scsi_device
*);
620 extern int ata_scsi_device_suspend(struct scsi_device
*, pm_message_t state
);
621 extern int ata_device_resume(struct ata_device
*);
622 extern int ata_device_suspend(struct ata_device
*, pm_message_t state
);
623 extern int ata_ratelimit(void);
624 extern unsigned int ata_busy_sleep(struct ata_port
*ap
,
625 unsigned long timeout_pat
,
626 unsigned long timeout
);
627 extern void ata_port_queue_task(struct ata_port
*ap
, void (*fn
)(void *),
628 void *data
, unsigned long delay
);
629 extern u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
630 unsigned long interval_msec
,
631 unsigned long timeout_msec
);
634 * Default driver ops implementations
636 extern void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
637 extern void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
);
638 extern void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
);
639 extern void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
);
640 extern void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
);
641 extern void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
);
642 extern u8
ata_check_status(struct ata_port
*ap
);
643 extern u8
ata_altstatus(struct ata_port
*ap
);
644 extern void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
645 extern int ata_std_probe_reset(struct ata_port
*ap
, unsigned int *classes
);
646 extern int ata_port_start (struct ata_port
*ap
);
647 extern void ata_port_stop (struct ata_port
*ap
);
648 extern void ata_host_stop (struct ata_host_set
*host_set
);
649 extern irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
);
650 extern void ata_mmio_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
651 unsigned int buflen
, int write_data
);
652 extern void ata_pio_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
653 unsigned int buflen
, int write_data
);
654 extern void ata_pio_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
655 unsigned int buflen
, int write_data
);
656 extern void ata_qc_prep(struct ata_queued_cmd
*qc
);
657 extern void ata_noop_qc_prep(struct ata_queued_cmd
*qc
);
658 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
);
659 extern void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
,
660 unsigned int buflen
);
661 extern void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
662 unsigned int n_elem
);
663 extern unsigned int ata_dev_classify(const struct ata_taskfile
*tf
);
664 extern void ata_id_string(const u16
*id
, unsigned char *s
,
665 unsigned int ofs
, unsigned int len
);
666 extern void ata_id_c_string(const u16
*id
, unsigned char *s
,
667 unsigned int ofs
, unsigned int len
);
668 extern void ata_bmdma_setup (struct ata_queued_cmd
*qc
);
669 extern void ata_bmdma_start (struct ata_queued_cmd
*qc
);
670 extern void ata_bmdma_stop(struct ata_queued_cmd
*qc
);
671 extern u8
ata_bmdma_status(struct ata_port
*ap
);
672 extern void ata_bmdma_irq_clear(struct ata_port
*ap
);
673 extern void ata_bmdma_freeze(struct ata_port
*ap
);
674 extern void ata_bmdma_thaw(struct ata_port
*ap
);
675 extern void ata_bmdma_drive_eh(struct ata_port
*ap
,
676 ata_reset_fn_t softreset
,
677 ata_reset_fn_t hardreset
,
678 ata_postreset_fn_t postreset
);
679 extern void ata_bmdma_error_handler(struct ata_port
*ap
);
680 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd
*qc
);
681 extern void ata_qc_complete(struct ata_queued_cmd
*qc
);
682 extern int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
683 void (*finish_qc
)(struct ata_queued_cmd
*));
684 extern void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
685 void (*done
)(struct scsi_cmnd
*));
686 extern int ata_std_bios_param(struct scsi_device
*sdev
,
687 struct block_device
*bdev
,
688 sector_t capacity
, int geom
[]);
689 extern int ata_scsi_slave_config(struct scsi_device
*sdev
);
690 extern int ata_scsi_change_queue_depth(struct scsi_device
*sdev
,
692 extern struct ata_device
*ata_dev_pair(struct ata_device
*adev
);
698 extern unsigned int ata_pio_need_iordy(const struct ata_device
*);
699 extern int ata_timing_compute(struct ata_device
*, unsigned short,
700 struct ata_timing
*, int, int);
701 extern void ata_timing_merge(const struct ata_timing
*,
702 const struct ata_timing
*, struct ata_timing
*,
706 ATA_TIMING_SETUP
= (1 << 0),
707 ATA_TIMING_ACT8B
= (1 << 1),
708 ATA_TIMING_REC8B
= (1 << 2),
709 ATA_TIMING_CYC8B
= (1 << 3),
710 ATA_TIMING_8BIT
= ATA_TIMING_ACT8B
| ATA_TIMING_REC8B
|
712 ATA_TIMING_ACTIVE
= (1 << 4),
713 ATA_TIMING_RECOVER
= (1 << 5),
714 ATA_TIMING_CYCLE
= (1 << 6),
715 ATA_TIMING_UDMA
= (1 << 7),
716 ATA_TIMING_ALL
= ATA_TIMING_SETUP
| ATA_TIMING_ACT8B
|
717 ATA_TIMING_REC8B
| ATA_TIMING_CYC8B
|
718 ATA_TIMING_ACTIVE
| ATA_TIMING_RECOVER
|
719 ATA_TIMING_CYCLE
| ATA_TIMING_UDMA
,
725 unsigned int reg
; /* PCI config register to read */
726 unsigned int width
; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
731 extern void ata_pci_host_stop (struct ata_host_set
*host_set
);
732 extern struct ata_probe_ent
*
733 ata_pci_init_native_mode(struct pci_dev
*pdev
, struct ata_port_info
**port
, int portmask
);
734 extern int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
);
735 extern unsigned long ata_pci_default_filter(const struct ata_port
*, struct ata_device
*, unsigned long);
736 #endif /* CONFIG_PCI */
741 extern void ata_eng_timeout(struct ata_port
*ap
);
743 extern void ata_port_schedule_eh(struct ata_port
*ap
);
744 extern int ata_port_abort(struct ata_port
*ap
);
745 extern int ata_port_freeze(struct ata_port
*ap
);
747 extern void ata_eh_freeze_port(struct ata_port
*ap
);
748 extern void ata_eh_thaw_port(struct ata_port
*ap
);
750 extern void ata_eh_qc_complete(struct ata_queued_cmd
*qc
);
751 extern void ata_eh_qc_retry(struct ata_queued_cmd
*qc
);
753 extern void ata_do_eh(struct ata_port
*ap
, ata_reset_fn_t softreset
,
754 ata_reset_fn_t hardreset
, ata_postreset_fn_t postreset
);
759 #define ata_port_printk(ap, lv, fmt, args...) \
760 printk(lv"ata%u: "fmt, (ap)->id , ##args)
762 #define ata_dev_printk(dev, lv, fmt, args...) \
763 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
766 * ata_eh_info helpers
768 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
769 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
770 ATA_EH_DESC_LEN - (ehi)->desc_len, \
774 #define ata_ehi_clear_desc(ehi) do { \
775 (ehi)->desc[0] = '\0'; \
776 (ehi)->desc_len = 0; \
783 ata_sg_is_last(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
785 if (sg
== &qc
->pad_sgent
)
789 if (((sg
- qc
->__sg
) + 1) == qc
->n_elem
)
794 static inline struct scatterlist
*
795 ata_qc_first_sg(struct ata_queued_cmd
*qc
)
800 return &qc
->pad_sgent
;
804 static inline struct scatterlist
*
805 ata_qc_next_sg(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
807 if (sg
== &qc
->pad_sgent
)
809 if (++sg
- qc
->__sg
< qc
->n_elem
)
812 return &qc
->pad_sgent
;
816 #define ata_for_each_sg(sg, qc) \
817 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
819 static inline unsigned int ata_tag_valid(unsigned int tag
)
821 return (tag
< ATA_MAX_QUEUE
) ? 1 : 0;
824 static inline unsigned int ata_tag_internal(unsigned int tag
)
826 return tag
== ATA_MAX_QUEUE
- 1;
829 static inline unsigned int ata_class_enabled(unsigned int class)
831 return class == ATA_DEV_ATA
|| class == ATA_DEV_ATAPI
;
834 static inline unsigned int ata_class_disabled(unsigned int class)
836 return class == ATA_DEV_ATA_UNSUP
|| class == ATA_DEV_ATAPI_UNSUP
;
839 static inline unsigned int ata_class_absent(unsigned int class)
841 return !ata_class_enabled(class) && !ata_class_disabled(class);
844 static inline unsigned int ata_dev_enabled(const struct ata_device
*dev
)
846 return ata_class_enabled(dev
->class);
849 static inline unsigned int ata_dev_disabled(const struct ata_device
*dev
)
851 return ata_class_disabled(dev
->class);
854 static inline unsigned int ata_dev_absent(const struct ata_device
*dev
)
856 return ata_class_absent(dev
->class);
859 static inline u8
ata_chk_status(struct ata_port
*ap
)
861 return ap
->ops
->check_status(ap
);
866 * ata_pause - Flush writes and pause 400 nanoseconds.
867 * @ap: Port to wait for.
870 * Inherited from caller.
873 static inline void ata_pause(struct ata_port
*ap
)
881 * ata_busy_wait - Wait for a port status register
882 * @ap: Port to wait for.
884 * Waits up to max*10 microseconds for the selected bits in the port's
885 * status register to be cleared.
886 * Returns final value of status register.
889 * Inherited from caller.
892 static inline u8
ata_busy_wait(struct ata_port
*ap
, unsigned int bits
,
899 status
= ata_chk_status(ap
);
901 } while ((status
& bits
) && (max
> 0));
908 * ata_wait_idle - Wait for a port to be idle.
909 * @ap: Port to wait for.
911 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
912 * Returns final value of status register.
915 * Inherited from caller.
918 static inline u8
ata_wait_idle(struct ata_port
*ap
)
920 u8 status
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 1000);
922 if (status
& (ATA_BUSY
| ATA_DRQ
)) {
923 unsigned long l
= ap
->ioaddr
.status_addr
;
924 if (ata_msg_warn(ap
))
925 printk(KERN_WARNING
"ATA: abnormal status 0x%X on port 0x%lX\n",
932 static inline void ata_qc_set_polling(struct ata_queued_cmd
*qc
)
934 qc
->tf
.ctl
|= ATA_NIEN
;
937 static inline struct ata_queued_cmd
*__ata_qc_from_tag(struct ata_port
*ap
,
940 if (likely(ata_tag_valid(tag
)))
941 return &ap
->qcmd
[tag
];
945 static inline struct ata_queued_cmd
*ata_qc_from_tag(struct ata_port
*ap
,
948 struct ata_queued_cmd
*qc
= __ata_qc_from_tag(ap
, tag
);
950 if (unlikely(!qc
) || !ap
->ops
->error_handler
)
953 if ((qc
->flags
& (ATA_QCFLAG_ACTIVE
|
954 ATA_QCFLAG_FAILED
)) == ATA_QCFLAG_ACTIVE
)
960 static inline void ata_tf_init(struct ata_device
*dev
, struct ata_taskfile
*tf
)
962 memset(tf
, 0, sizeof(*tf
));
964 tf
->ctl
= dev
->ap
->ctl
;
966 tf
->device
= ATA_DEVICE_OBS
;
968 tf
->device
= ATA_DEVICE_OBS
| ATA_DEV1
;
971 static inline void ata_qc_reinit(struct ata_queued_cmd
*qc
)
975 qc
->cursect
= qc
->cursg
= qc
->cursg_ofs
= 0;
977 qc
->nbytes
= qc
->curbytes
= 0;
980 ata_tf_init(qc
->dev
, &qc
->tf
);
982 /* init result_tf such that it indicates normal completion */
983 qc
->result_tf
.command
= ATA_DRDY
;
984 qc
->result_tf
.feature
= 0;
988 * ata_irq_on - Enable interrupts on a port.
989 * @ap: Port on which interrupts are enabled.
991 * Enable interrupts on a legacy IDE device using MMIO or PIO,
992 * wait for idle, clear any pending interrupts.
995 * Inherited from caller.
998 static inline u8
ata_irq_on(struct ata_port
*ap
)
1000 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1003 ap
->ctl
&= ~ATA_NIEN
;
1004 ap
->last_ctl
= ap
->ctl
;
1006 if (ap
->flags
& ATA_FLAG_MMIO
)
1007 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
1009 outb(ap
->ctl
, ioaddr
->ctl_addr
);
1010 tmp
= ata_wait_idle(ap
);
1012 ap
->ops
->irq_clear(ap
);
1019 * ata_irq_ack - Acknowledge a device interrupt.
1020 * @ap: Port on which interrupts are enabled.
1022 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1023 * or BUSY+DRQ clear). Obtain dma status and port status from
1024 * device. Clear the interrupt. Return port status.
1029 static inline u8
ata_irq_ack(struct ata_port
*ap
, unsigned int chk_drq
)
1031 unsigned int bits
= chk_drq
? ATA_BUSY
| ATA_DRQ
: ATA_BUSY
;
1032 u8 host_stat
, post_stat
, status
;
1034 status
= ata_busy_wait(ap
, bits
, 1000);
1036 if (ata_msg_err(ap
))
1037 printk(KERN_ERR
"abnormal status 0x%X\n", status
);
1039 /* get controller status; clear intr, err bits */
1040 if (ap
->flags
& ATA_FLAG_MMIO
) {
1041 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
1042 host_stat
= readb(mmio
+ ATA_DMA_STATUS
);
1043 writeb(host_stat
| ATA_DMA_INTR
| ATA_DMA_ERR
,
1044 mmio
+ ATA_DMA_STATUS
);
1046 post_stat
= readb(mmio
+ ATA_DMA_STATUS
);
1048 host_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
1049 outb(host_stat
| ATA_DMA_INTR
| ATA_DMA_ERR
,
1050 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
1052 post_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
1055 if (ata_msg_intr(ap
))
1056 printk(KERN_INFO
"%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1058 host_stat
, post_stat
, status
);
1063 static inline int ata_try_flush_cache(const struct ata_device
*dev
)
1065 return ata_id_wcache_enabled(dev
->id
) ||
1066 ata_id_has_flush(dev
->id
) ||
1067 ata_id_has_flush_ext(dev
->id
);
1070 static inline unsigned int ac_err_mask(u8 status
)
1072 if (status
& (ATA_BUSY
| ATA_DRQ
))
1074 if (status
& (ATA_ERR
| ATA_DF
))
1079 static inline unsigned int __ac_err_mask(u8 status
)
1081 unsigned int mask
= ac_err_mask(status
);
1083 return AC_ERR_OTHER
;
1087 static inline int ata_pad_alloc(struct ata_port
*ap
, struct device
*dev
)
1090 ap
->pad
= dma_alloc_coherent(dev
, ATA_DMA_PAD_BUF_SZ
,
1091 &ap
->pad_dma
, GFP_KERNEL
);
1092 return (ap
->pad
== NULL
) ? -ENOMEM
: 0;
1095 static inline void ata_pad_free(struct ata_port
*ap
, struct device
*dev
)
1097 dma_free_coherent(dev
, ATA_DMA_PAD_BUF_SZ
, ap
->pad
, ap
->pad_dma
);
1100 static inline struct ata_port
*ata_shost_to_port(struct Scsi_Host
*host
)
1102 return (struct ata_port
*) &host
->hostdata
[0];
1105 #endif /* __LINUX_LIBATA_H__ */