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>
33 #include <asm/scatterlist.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
41 * Define if arch has non-standard setup. This is a _PCI_ standard
42 * not a legacy or ISA standard.
44 #ifdef CONFIG_ATA_NONSTANDARD
45 #include <asm/libata-portmap.h>
47 #include <asm-generic/libata-portmap.h>
51 * compile-time options: to be removed as soon as all the drivers are
52 * converted to the new debugging mechanism
54 #undef ATA_DEBUG /* debugging output */
55 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
56 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
57 #undef ATA_NDEBUG /* define to disable quick runtime checks */
60 /* note: prints function name for you */
62 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
63 #ifdef ATA_VERBOSE_DEBUG
64 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
66 #define VPRINTK(fmt, args...)
67 #endif /* ATA_VERBOSE_DEBUG */
69 #define DPRINTK(fmt, args...)
70 #define VPRINTK(fmt, args...)
71 #endif /* ATA_DEBUG */
73 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
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,
119 LIBATA_DUMB_MAX_PRD
= ATA_MAX_PRD
/ 4, /* Worst case */
122 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
124 ATA_TAG_INTERNAL
= ATA_MAX_QUEUE
- 1,
126 ATA_DEF_BUSY_WAIT
= 10000,
127 ATA_SHORT_PAUSE
= (HZ
>> 6) + 1,
129 ATA_SHT_EMULATED
= 1,
130 ATA_SHT_CMD_PER_LUN
= 1,
131 ATA_SHT_THIS_ID
= -1,
132 ATA_SHT_USE_CLUSTERING
= 1,
134 /* struct ata_device stuff */
135 ATA_DFLAG_LBA
= (1 << 0), /* device supports LBA */
136 ATA_DFLAG_LBA48
= (1 << 1), /* device supports LBA48 */
137 ATA_DFLAG_CDB_INTR
= (1 << 2), /* device asserts INTRQ when ready for CDB */
138 ATA_DFLAG_NCQ
= (1 << 3), /* device supports NCQ */
139 ATA_DFLAG_FLUSH_EXT
= (1 << 4), /* do FLUSH_EXT instead of FLUSH */
140 ATA_DFLAG_ACPI_PENDING
= (1 << 5), /* ACPI resume action pending */
141 ATA_DFLAG_ACPI_FAILED
= (1 << 6), /* ACPI on devcfg has failed */
142 ATA_DFLAG_CFG_MASK
= (1 << 8) - 1,
144 ATA_DFLAG_PIO
= (1 << 8), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF
= (1 << 9), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SPUNDOWN
= (1 << 10), /* XXX: for spindown_compat */
147 ATA_DFLAG_INIT_MASK
= (1 << 16) - 1,
149 ATA_DFLAG_DETACH
= (1 << 16),
150 ATA_DFLAG_DETACHED
= (1 << 17),
152 ATA_DEV_UNKNOWN
= 0, /* unknown device */
153 ATA_DEV_ATA
= 1, /* ATA device */
154 ATA_DEV_ATA_UNSUP
= 2, /* ATA device (unsupported) */
155 ATA_DEV_ATAPI
= 3, /* ATAPI device */
156 ATA_DEV_ATAPI_UNSUP
= 4, /* ATAPI device (unsupported) */
157 ATA_DEV_NONE
= 5, /* no device */
159 /* struct ata_port flags */
160 ATA_FLAG_SLAVE_POSS
= (1 << 0), /* host supports slave dev */
161 /* (doesn't imply presence) */
162 ATA_FLAG_SATA
= (1 << 1),
163 ATA_FLAG_NO_LEGACY
= (1 << 2), /* no legacy mode check */
164 ATA_FLAG_MMIO
= (1 << 3), /* use MMIO, not PIO */
165 ATA_FLAG_SRST
= (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
166 ATA_FLAG_SATA_RESET
= (1 << 5), /* (obsolete) use COMRESET */
167 ATA_FLAG_NO_ATAPI
= (1 << 6), /* No ATAPI support */
168 ATA_FLAG_PIO_DMA
= (1 << 7), /* PIO cmds via DMA */
169 ATA_FLAG_PIO_LBA48
= (1 << 8), /* Host DMA engine is LBA28 only */
170 ATA_FLAG_PIO_POLLING
= (1 << 9), /* use polling PIO if LLD
171 * doesn't handle PIO interrupts */
172 ATA_FLAG_NCQ
= (1 << 10), /* host supports NCQ */
173 ATA_FLAG_HRST_TO_RESUME
= (1 << 11), /* hardreset to resume phy */
174 ATA_FLAG_SKIP_D2H_BSY
= (1 << 12), /* can't wait for the first D2H
175 * Register FIS clearing BSY */
176 ATA_FLAG_DEBUGMSG
= (1 << 13),
177 ATA_FLAG_IGN_SIMPLEX
= (1 << 15), /* ignore SIMPLEX */
178 ATA_FLAG_NO_IORDY
= (1 << 16), /* controller lacks iordy */
179 ATA_FLAG_ACPI_SATA
= (1 << 17), /* need native SATA ACPI layout */
181 /* The following flag belongs to ap->pflags but is kept in
182 * ap->flags because it's referenced in many LLDs and will be
183 * removed in not-too-distant future.
185 ATA_FLAG_DISABLED
= (1 << 23), /* port is disabled, ignore it */
187 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
189 /* struct ata_port pflags */
190 ATA_PFLAG_EH_PENDING
= (1 << 0), /* EH pending */
191 ATA_PFLAG_EH_IN_PROGRESS
= (1 << 1), /* EH in progress */
192 ATA_PFLAG_FROZEN
= (1 << 2), /* port is frozen */
193 ATA_PFLAG_RECOVERED
= (1 << 3), /* recovery action performed */
194 ATA_PFLAG_LOADING
= (1 << 4), /* boot/loading probe */
195 ATA_PFLAG_UNLOADING
= (1 << 5), /* module is unloading */
196 ATA_PFLAG_SCSI_HOTPLUG
= (1 << 6), /* SCSI hotplug scheduled */
197 ATA_PFLAG_INITIALIZING
= (1 << 7), /* being initialized, don't touch */
199 ATA_PFLAG_SUSPENDED
= (1 << 17), /* port is suspended (power) */
200 ATA_PFLAG_PM_PENDING
= (1 << 18), /* PM operation pending */
201 ATA_PFLAG_GTM_VALID
= (1 << 19), /* acpi_gtm data valid */
203 /* struct ata_queued_cmd flags */
204 ATA_QCFLAG_ACTIVE
= (1 << 0), /* cmd not yet ack'd to scsi lyer */
205 ATA_QCFLAG_SG
= (1 << 1), /* have s/g table? */
206 ATA_QCFLAG_SINGLE
= (1 << 2), /* no s/g, just a single buffer */
207 ATA_QCFLAG_DMAMAP
= ATA_QCFLAG_SG
| ATA_QCFLAG_SINGLE
,
208 ATA_QCFLAG_IO
= (1 << 3), /* standard IO command */
209 ATA_QCFLAG_RESULT_TF
= (1 << 4), /* result TF requested */
211 ATA_QCFLAG_FAILED
= (1 << 16), /* cmd failed and is owned by EH */
212 ATA_QCFLAG_SENSE_VALID
= (1 << 17), /* sense data valid */
213 ATA_QCFLAG_EH_SCHEDULED
= (1 << 18), /* EH scheduled (obsolete) */
216 ATA_HOST_SIMPLEX
= (1 << 0), /* Host is simplex, one DMA channel per host only */
217 ATA_HOST_STARTED
= (1 << 1), /* Host started */
219 /* various lengths of time */
220 ATA_TMOUT_BOOT
= 30 * HZ
, /* heuristic */
221 ATA_TMOUT_BOOT_QUICK
= 7 * HZ
, /* heuristic */
222 ATA_TMOUT_INTERNAL
= 30 * HZ
,
223 ATA_TMOUT_INTERNAL_QUICK
= 5 * HZ
,
237 /* SATA port states */
242 /* encoding various smaller bitmaps into a single
243 * unsigned int bitmap
250 ATA_SHIFT_MWDMA
= ATA_SHIFT_PIO
+ ATA_BITS_PIO
,
251 ATA_SHIFT_UDMA
= ATA_SHIFT_MWDMA
+ ATA_BITS_MWDMA
,
253 ATA_MASK_PIO
= ((1 << ATA_BITS_PIO
) - 1) << ATA_SHIFT_PIO
,
254 ATA_MASK_MWDMA
= ((1 << ATA_BITS_MWDMA
) - 1) << ATA_SHIFT_MWDMA
,
255 ATA_MASK_UDMA
= ((1 << ATA_BITS_UDMA
) - 1) << ATA_SHIFT_UDMA
,
257 /* size of buffer to pad xfers ending on unaligned boundaries */
259 ATA_DMA_PAD_BUF_SZ
= ATA_DMA_PAD_SZ
* ATA_MAX_QUEUE
,
264 /* desc_len for ata_eh_info and context */
265 ATA_EH_DESC_LEN
= 80,
267 /* reset / recovery action types */
268 ATA_EH_REVALIDATE
= (1 << 0),
269 ATA_EH_SOFTRESET
= (1 << 1),
270 ATA_EH_HARDRESET
= (1 << 2),
272 ATA_EH_RESET_MASK
= ATA_EH_SOFTRESET
| ATA_EH_HARDRESET
,
273 ATA_EH_PERDEV_MASK
= ATA_EH_REVALIDATE
,
275 /* ata_eh_info->flags */
276 ATA_EHI_HOTPLUGGED
= (1 << 0), /* could have been hotplugged */
277 ATA_EHI_RESUME_LINK
= (1 << 1), /* resume link (reset modifier) */
278 ATA_EHI_NO_AUTOPSY
= (1 << 2), /* no autopsy */
279 ATA_EHI_QUIET
= (1 << 3), /* be quiet */
281 ATA_EHI_DID_SOFTRESET
= (1 << 16), /* already soft-reset this port */
282 ATA_EHI_DID_HARDRESET
= (1 << 17), /* already soft-reset this port */
283 ATA_EHI_PRINTINFO
= (1 << 18), /* print configuration info */
284 ATA_EHI_SETMODE
= (1 << 19), /* configure transfer mode */
285 ATA_EHI_POST_SETMODE
= (1 << 20), /* revaildating after setmode */
287 ATA_EHI_DID_RESET
= ATA_EHI_DID_SOFTRESET
| ATA_EHI_DID_HARDRESET
,
288 ATA_EHI_RESET_MODIFIER_MASK
= ATA_EHI_RESUME_LINK
,
290 /* max repeat if error condition is still set after ->error_handler */
291 ATA_EH_MAX_REPEAT
= 5,
293 /* how hard are we gonna try to probe/recover devices */
294 ATA_PROBE_MAX_TRIES
= 3,
295 ATA_EH_DEV_TRIES
= 3,
297 /* Horkage types. May be set by libata or controller on drives
298 (some horkage may be drive/controller pair dependant */
300 ATA_HORKAGE_DIAGNOSTIC
= (1 << 0), /* Failed boot diag */
301 ATA_HORKAGE_NODMA
= (1 << 1), /* DMA problems */
302 ATA_HORKAGE_NONCQ
= (1 << 2), /* Don't use NCQ */
303 ATA_HORKAGE_MAX_SEC_128
= (1 << 3), /* Limit max sects to 128 */
306 enum hsm_task_states
{
307 HSM_ST_IDLE
, /* no command on going */
308 HSM_ST_FIRST
, /* (waiting the device to)
309 write CDB or first data block */
310 HSM_ST
, /* (waiting the device to) transfer data */
311 HSM_ST_LAST
, /* (waiting the device to) complete command */
312 HSM_ST_ERR
, /* error */
315 enum ata_completion_errors
{
316 AC_ERR_DEV
= (1 << 0), /* device reported error */
317 AC_ERR_HSM
= (1 << 1), /* host state machine violation */
318 AC_ERR_TIMEOUT
= (1 << 2), /* timeout */
319 AC_ERR_MEDIA
= (1 << 3), /* media error */
320 AC_ERR_ATA_BUS
= (1 << 4), /* ATA bus error */
321 AC_ERR_HOST_BUS
= (1 << 5), /* host bus error */
322 AC_ERR_SYSTEM
= (1 << 6), /* system error */
323 AC_ERR_INVALID
= (1 << 7), /* invalid argument */
324 AC_ERR_OTHER
= (1 << 8), /* unknown */
325 AC_ERR_NODEV_HINT
= (1 << 9), /* polling device detection hint */
328 /* forward declarations */
330 struct ata_port_operations
;
332 struct ata_queued_cmd
;
335 typedef void (*ata_qc_cb_t
) (struct ata_queued_cmd
*qc
);
336 typedef int (*ata_prereset_fn_t
)(struct ata_port
*ap
, unsigned long deadline
);
337 typedef int (*ata_reset_fn_t
)(struct ata_port
*ap
, unsigned int *classes
,
338 unsigned long deadline
);
339 typedef void (*ata_postreset_fn_t
)(struct ata_port
*ap
, unsigned int *classes
);
342 void __iomem
*cmd_addr
;
343 void __iomem
*data_addr
;
344 void __iomem
*error_addr
;
345 void __iomem
*feature_addr
;
346 void __iomem
*nsect_addr
;
347 void __iomem
*lbal_addr
;
348 void __iomem
*lbam_addr
;
349 void __iomem
*lbah_addr
;
350 void __iomem
*device_addr
;
351 void __iomem
*status_addr
;
352 void __iomem
*command_addr
;
353 void __iomem
*altstatus_addr
;
354 void __iomem
*ctl_addr
;
355 void __iomem
*bmdma_addr
;
356 void __iomem
*scr_addr
;
364 void __iomem
* const *iomap
;
365 unsigned int n_ports
;
367 const struct ata_port_operations
*ops
;
369 #ifdef CONFIG_ATA_ACPI
370 acpi_handle acpi_handle
;
372 struct ata_port
*simplex_claimed
; /* channel owning the DMA */
373 struct ata_port
*ports
[0];
376 struct ata_queued_cmd
{
378 struct ata_device
*dev
;
380 struct scsi_cmnd
*scsicmd
;
381 void (*scsidone
)(struct scsi_cmnd
*);
383 struct ata_taskfile tf
;
384 u8 cdb
[ATAPI_CDB_LEN
];
386 unsigned long flags
; /* ATA_QCFLAG_xxx */
389 unsigned int orig_n_elem
;
393 unsigned int pad_len
;
394 unsigned int sect_size
;
397 unsigned int curbytes
;
400 unsigned int cursg_ofs
;
402 struct scatterlist sgent
;
403 struct scatterlist pad_sgent
;
406 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
407 struct scatterlist
*__sg
;
409 unsigned int err_mask
;
410 struct ata_taskfile result_tf
;
411 ata_qc_cb_t complete_fn
;
416 struct ata_port_stats
{
417 unsigned long unhandled_irq
;
418 unsigned long idle_irq
;
419 unsigned long rw_reqbuf
;
422 struct ata_ering_entry
{
424 unsigned int err_mask
;
430 struct ata_ering_entry ring
[ATA_ERING_SIZE
];
435 unsigned int devno
; /* 0 or 1 */
436 unsigned long flags
; /* ATA_DFLAG_xxx */
437 unsigned int horkage
; /* List of broken features */
438 struct scsi_device
*sdev
; /* attached SCSI device */
439 #ifdef CONFIG_ATA_ACPI
440 acpi_handle acpi_handle
;
442 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
443 u64 n_sectors
; /* size of device, if ATA */
444 unsigned int class; /* ATA_DEV_xxx */
445 u16 id
[ATA_ID_WORDS
]; /* IDENTIFY xxx DEVICE data */
449 unsigned int xfer_shift
; /* ATA_SHIFT_xxx */
451 unsigned int multi_count
; /* sectors count for
452 READ/WRITE MULTIPLE */
453 unsigned int max_sectors
; /* per-device max sectors */
454 unsigned int cdb_len
;
456 /* per-dev xfer mask */
457 unsigned int pio_mask
;
458 unsigned int mwdma_mask
;
459 unsigned int udma_mask
;
461 /* for CHS addressing */
462 u16 cylinders
; /* Number of cylinders */
463 u16 heads
; /* Number of heads */
464 u16 sectors
; /* Number of sectors per track */
467 struct ata_ering ering
;
471 /* Offset into struct ata_device. Fields above it are maintained
472 * acress device init. Fields below are zeroed.
474 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
477 struct ata_device
*dev
; /* offending device */
478 u32 serror
; /* SError from LLDD */
479 unsigned int err_mask
; /* port-wide err_mask */
480 unsigned int action
; /* ATA_EH_* action mask */
481 unsigned int dev_action
[ATA_MAX_DEVICES
]; /* dev EH action */
482 unsigned int flags
; /* ATA_EHI_* flags */
484 unsigned int probe_mask
;
486 char desc
[ATA_EH_DESC_LEN
];
490 struct ata_eh_context
{
491 struct ata_eh_info i
;
492 int tries
[ATA_MAX_DEVICES
];
493 unsigned int classes
[ATA_MAX_DEVICES
];
494 unsigned int did_probe_mask
;
497 struct ata_acpi_drive
503 struct ata_acpi_gtm
{
504 struct ata_acpi_drive drive
[2];
509 struct Scsi_Host
*scsi_host
; /* our co-allocated scsi host */
510 const struct ata_port_operations
*ops
;
512 unsigned long flags
; /* ATA_FLAG_xxx */
513 unsigned int pflags
; /* ATA_PFLAG_xxx */
514 unsigned int print_id
; /* user visible unique port ID */
515 unsigned int port_no
; /* 0 based port no. inside the host */
517 struct ata_prd
*prd
; /* our SG list */
518 dma_addr_t prd_dma
; /* and its DMA mapping */
520 void *pad
; /* array of DMA pad buffers */
523 struct ata_ioports ioaddr
; /* ATA cmd/ctl/dma register blocks */
525 u8 ctl
; /* cache of ATA control register */
526 u8 last_ctl
; /* Cache last written value */
527 unsigned int pio_mask
;
528 unsigned int mwdma_mask
;
529 unsigned int udma_mask
;
530 unsigned int cbl
; /* cable type; ATA_CBL_xxx */
531 unsigned int hw_sata_spd_limit
;
532 unsigned int sata_spd_limit
; /* SATA PHY speed limit */
534 /* record runtime error info, protected by host lock */
535 struct ata_eh_info eh_info
;
536 /* EH context owned by EH */
537 struct ata_eh_context eh_context
;
539 struct ata_device device
[ATA_MAX_DEVICES
];
541 struct ata_queued_cmd qcmd
[ATA_MAX_QUEUE
];
542 unsigned long qc_allocated
;
543 unsigned int qc_active
;
545 unsigned int active_tag
;
548 struct ata_port_stats stats
;
549 struct ata_host
*host
;
552 void *port_task_data
;
553 struct delayed_work port_task
;
554 struct delayed_work hotplug_task
;
555 struct work_struct scsi_rescan_task
;
557 unsigned int hsm_task_state
;
560 struct list_head eh_done_q
;
561 wait_queue_head_t eh_wait_q
;
563 pm_message_t pm_mesg
;
568 #ifdef CONFIG_ATA_ACPI
569 acpi_handle acpi_handle
;
570 struct ata_acpi_gtm acpi_gtm
;
572 u8 sector_buf
[ATA_SECT_SIZE
]; /* owned by EH */
575 struct ata_port_operations
{
576 void (*port_disable
) (struct ata_port
*);
578 void (*dev_config
) (struct ata_device
*);
580 void (*set_piomode
) (struct ata_port
*, struct ata_device
*);
581 void (*set_dmamode
) (struct ata_port
*, struct ata_device
*);
582 unsigned long (*mode_filter
) (struct ata_device
*, unsigned long);
584 void (*tf_load
) (struct ata_port
*ap
, const struct ata_taskfile
*tf
);
585 void (*tf_read
) (struct ata_port
*ap
, struct ata_taskfile
*tf
);
587 void (*exec_command
)(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
588 u8 (*check_status
)(struct ata_port
*ap
);
589 u8 (*check_altstatus
)(struct ata_port
*ap
);
590 void (*dev_select
)(struct ata_port
*ap
, unsigned int device
);
592 void (*phy_reset
) (struct ata_port
*ap
); /* obsolete */
593 int (*set_mode
) (struct ata_port
*ap
, struct ata_device
**r_failed_dev
);
595 int (*cable_detect
) (struct ata_port
*ap
);
597 int (*check_atapi_dma
) (struct ata_queued_cmd
*qc
);
599 void (*bmdma_setup
) (struct ata_queued_cmd
*qc
);
600 void (*bmdma_start
) (struct ata_queued_cmd
*qc
);
602 void (*data_xfer
) (struct ata_device
*, unsigned char *, unsigned int, int);
604 void (*qc_prep
) (struct ata_queued_cmd
*qc
);
605 unsigned int (*qc_issue
) (struct ata_queued_cmd
*qc
);
607 /* Error handlers. ->error_handler overrides ->eng_timeout and
608 * indicates that new-style EH is in place.
610 void (*eng_timeout
) (struct ata_port
*ap
); /* obsolete */
612 void (*freeze
) (struct ata_port
*ap
);
613 void (*thaw
) (struct ata_port
*ap
);
614 void (*error_handler
) (struct ata_port
*ap
);
615 void (*post_internal_cmd
) (struct ata_queued_cmd
*qc
);
617 irq_handler_t irq_handler
;
618 void (*irq_clear
) (struct ata_port
*);
619 u8 (*irq_on
) (struct ata_port
*);
620 u8 (*irq_ack
) (struct ata_port
*ap
, unsigned int chk_drq
);
622 u32 (*scr_read
) (struct ata_port
*ap
, unsigned int sc_reg
);
623 void (*scr_write
) (struct ata_port
*ap
, unsigned int sc_reg
,
626 int (*port_suspend
) (struct ata_port
*ap
, pm_message_t mesg
);
627 int (*port_resume
) (struct ata_port
*ap
);
629 int (*port_start
) (struct ata_port
*ap
);
630 void (*port_stop
) (struct ata_port
*ap
);
632 void (*host_stop
) (struct ata_host
*host
);
634 void (*bmdma_stop
) (struct ata_queued_cmd
*qc
);
635 u8 (*bmdma_status
) (struct ata_port
*ap
);
638 struct ata_port_info
{
639 struct scsi_host_template
*sht
;
641 unsigned long pio_mask
;
642 unsigned long mwdma_mask
;
643 unsigned long udma_mask
;
644 const struct ata_port_operations
*port_ops
;
645 irq_handler_t irq_handler
;
650 unsigned short mode
; /* ATA mode */
651 unsigned short setup
; /* t1 */
652 unsigned short act8b
; /* t2 for 8-bit I/O */
653 unsigned short rec8b
; /* t2i for 8-bit I/O */
654 unsigned short cyc8b
; /* t0 for 8-bit I/O */
655 unsigned short active
; /* t2 or tD */
656 unsigned short recover
; /* t2i or tK */
657 unsigned short cycle
; /* t0 */
658 unsigned short udma
; /* t2CYCTYP/2 */
661 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
663 extern const unsigned long sata_deb_timing_normal
[];
664 extern const unsigned long sata_deb_timing_hotplug
[];
665 extern const unsigned long sata_deb_timing_long
[];
667 extern const struct ata_port_operations ata_dummy_port_ops
;
668 extern const struct ata_port_info ata_dummy_port_info
;
670 static inline const unsigned long *
671 sata_ehc_deb_timing(struct ata_eh_context
*ehc
)
673 if (ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
)
674 return sata_deb_timing_hotplug
;
676 return sata_deb_timing_normal
;
679 static inline int ata_port_is_dummy(struct ata_port
*ap
)
681 return ap
->ops
== &ata_dummy_port_ops
;
684 extern void sata_print_link_status(struct ata_port
*ap
);
685 extern void ata_port_probe(struct ata_port
*);
686 extern void __sata_phy_reset(struct ata_port
*ap
);
687 extern void sata_phy_reset(struct ata_port
*ap
);
688 extern void ata_bus_reset(struct ata_port
*ap
);
689 extern int sata_set_spd(struct ata_port
*ap
);
690 extern int sata_phy_debounce(struct ata_port
*ap
, const unsigned long *param
,
691 unsigned long deadline
);
692 extern int sata_phy_resume(struct ata_port
*ap
, const unsigned long *param
,
693 unsigned long deadline
);
694 extern int ata_std_prereset(struct ata_port
*ap
, unsigned long deadline
);
695 extern int ata_std_softreset(struct ata_port
*ap
, unsigned int *classes
,
696 unsigned long deadline
);
697 extern int sata_port_hardreset(struct ata_port
*ap
, const unsigned long *timing
,
698 unsigned long deadline
);
699 extern int sata_std_hardreset(struct ata_port
*ap
, unsigned int *class,
700 unsigned long deadline
);
701 extern void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
);
702 extern void ata_port_disable(struct ata_port
*);
703 extern void ata_std_ports(struct ata_ioports
*ioaddr
);
705 extern int ata_pci_init_one (struct pci_dev
*pdev
,
706 const struct ata_port_info
* const * ppi
);
707 extern void ata_pci_remove_one (struct pci_dev
*pdev
);
709 extern void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
);
710 extern int __must_check
ata_pci_device_do_resume(struct pci_dev
*pdev
);
711 extern int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
);
712 extern int ata_pci_device_resume(struct pci_dev
*pdev
);
714 extern int ata_pci_clear_simplex(struct pci_dev
*pdev
);
715 #endif /* CONFIG_PCI */
716 extern struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
);
717 extern struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
718 const struct ata_port_info
* const * ppi
, int n_ports
);
719 extern int ata_host_start(struct ata_host
*host
);
720 extern int ata_host_register(struct ata_host
*host
,
721 struct scsi_host_template
*sht
);
722 extern int ata_host_activate(struct ata_host
*host
, int irq
,
723 irq_handler_t irq_handler
, unsigned long irq_flags
,
724 struct scsi_host_template
*sht
);
725 extern void ata_host_detach(struct ata_host
*host
);
726 extern void ata_host_init(struct ata_host
*, struct device
*,
727 unsigned long, const struct ata_port_operations
*);
728 extern int ata_scsi_detect(struct scsi_host_template
*sht
);
729 extern int ata_scsi_ioctl(struct scsi_device
*dev
, int cmd
, void __user
*arg
);
730 extern int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*));
731 extern void ata_sas_port_destroy(struct ata_port
*);
732 extern struct ata_port
*ata_sas_port_alloc(struct ata_host
*,
733 struct ata_port_info
*, struct Scsi_Host
*);
734 extern int ata_sas_port_init(struct ata_port
*);
735 extern int ata_sas_port_start(struct ata_port
*ap
);
736 extern void ata_sas_port_stop(struct ata_port
*ap
);
737 extern int ata_sas_slave_configure(struct scsi_device
*, struct ata_port
*);
738 extern int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
739 struct ata_port
*ap
);
740 extern unsigned int ata_host_intr(struct ata_port
*ap
, struct ata_queued_cmd
*qc
);
741 extern int sata_scr_valid(struct ata_port
*ap
);
742 extern int sata_scr_read(struct ata_port
*ap
, int reg
, u32
*val
);
743 extern int sata_scr_write(struct ata_port
*ap
, int reg
, u32 val
);
744 extern int sata_scr_write_flush(struct ata_port
*ap
, int reg
, u32 val
);
745 extern int ata_port_online(struct ata_port
*ap
);
746 extern int ata_port_offline(struct ata_port
*ap
);
748 extern int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
);
749 extern void ata_host_resume(struct ata_host
*host
);
751 extern int ata_ratelimit(void);
752 extern int ata_busy_sleep(struct ata_port
*ap
,
753 unsigned long timeout_pat
, unsigned long timeout
);
754 extern int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
);
755 extern void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
,
756 void *data
, unsigned long delay
);
757 extern u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
758 unsigned long interval_msec
,
759 unsigned long timeout_msec
);
760 extern unsigned int ata_dev_try_classify(struct ata_port
*, unsigned int, u8
*);
763 * Default driver ops implementations
765 extern void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
766 extern void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
);
767 extern void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
);
768 extern void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
);
769 extern void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
);
770 extern void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
);
771 extern u8
ata_check_status(struct ata_port
*ap
);
772 extern u8
ata_altstatus(struct ata_port
*ap
);
773 extern void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
774 extern int ata_port_start (struct ata_port
*ap
);
775 extern int ata_sff_port_start (struct ata_port
*ap
);
776 extern irqreturn_t
ata_interrupt (int irq
, void *dev_instance
);
777 extern void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
778 unsigned int buflen
, int write_data
);
779 extern void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
780 unsigned int buflen
, int write_data
);
781 extern void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
);
782 extern void ata_qc_prep(struct ata_queued_cmd
*qc
);
783 extern void ata_noop_qc_prep(struct ata_queued_cmd
*qc
);
784 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
);
785 extern void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
,
786 unsigned int buflen
);
787 extern void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
788 unsigned int n_elem
);
789 extern unsigned int ata_dev_classify(const struct ata_taskfile
*tf
);
790 extern void ata_dev_disable(struct ata_device
*adev
);
791 extern void ata_id_string(const u16
*id
, unsigned char *s
,
792 unsigned int ofs
, unsigned int len
);
793 extern void ata_id_c_string(const u16
*id
, unsigned char *s
,
794 unsigned int ofs
, unsigned int len
);
795 extern void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
);
796 extern void ata_bmdma_setup (struct ata_queued_cmd
*qc
);
797 extern void ata_bmdma_start (struct ata_queued_cmd
*qc
);
798 extern void ata_bmdma_stop(struct ata_queued_cmd
*qc
);
799 extern u8
ata_bmdma_status(struct ata_port
*ap
);
800 extern void ata_bmdma_irq_clear(struct ata_port
*ap
);
801 extern void ata_bmdma_freeze(struct ata_port
*ap
);
802 extern void ata_bmdma_thaw(struct ata_port
*ap
);
803 extern void ata_bmdma_drive_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
804 ata_reset_fn_t softreset
,
805 ata_reset_fn_t hardreset
,
806 ata_postreset_fn_t postreset
);
807 extern void ata_bmdma_error_handler(struct ata_port
*ap
);
808 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd
*qc
);
809 extern int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
810 u8 status
, int in_wq
);
811 extern void ata_qc_complete(struct ata_queued_cmd
*qc
);
812 extern int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
813 void (*finish_qc
)(struct ata_queued_cmd
*));
814 extern void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
815 void (*done
)(struct scsi_cmnd
*));
816 extern int ata_std_bios_param(struct scsi_device
*sdev
,
817 struct block_device
*bdev
,
818 sector_t capacity
, int geom
[]);
819 extern int ata_scsi_slave_config(struct scsi_device
*sdev
);
820 extern void ata_scsi_slave_destroy(struct scsi_device
*sdev
);
821 extern int ata_scsi_change_queue_depth(struct scsi_device
*sdev
,
823 extern struct ata_device
*ata_dev_pair(struct ata_device
*adev
);
824 extern int ata_do_set_mode(struct ata_port
*ap
, struct ata_device
**r_failed_dev
);
825 extern u8
ata_irq_on(struct ata_port
*ap
);
826 extern u8
ata_dummy_irq_on(struct ata_port
*ap
);
827 extern u8
ata_irq_ack(struct ata_port
*ap
, unsigned int chk_drq
);
828 extern u8
ata_dummy_irq_ack(struct ata_port
*ap
, unsigned int chk_drq
);
830 extern int ata_cable_40wire(struct ata_port
*ap
);
831 extern int ata_cable_80wire(struct ata_port
*ap
);
832 extern int ata_cable_sata(struct ata_port
*ap
);
833 extern int ata_cable_unknown(struct ata_port
*ap
);
839 extern unsigned int ata_pio_need_iordy(const struct ata_device
*);
840 extern int ata_timing_compute(struct ata_device
*, unsigned short,
841 struct ata_timing
*, int, int);
842 extern void ata_timing_merge(const struct ata_timing
*,
843 const struct ata_timing
*, struct ata_timing
*,
847 ATA_TIMING_SETUP
= (1 << 0),
848 ATA_TIMING_ACT8B
= (1 << 1),
849 ATA_TIMING_REC8B
= (1 << 2),
850 ATA_TIMING_CYC8B
= (1 << 3),
851 ATA_TIMING_8BIT
= ATA_TIMING_ACT8B
| ATA_TIMING_REC8B
|
853 ATA_TIMING_ACTIVE
= (1 << 4),
854 ATA_TIMING_RECOVER
= (1 << 5),
855 ATA_TIMING_CYCLE
= (1 << 6),
856 ATA_TIMING_UDMA
= (1 << 7),
857 ATA_TIMING_ALL
= ATA_TIMING_SETUP
| ATA_TIMING_ACT8B
|
858 ATA_TIMING_REC8B
| ATA_TIMING_CYC8B
|
859 ATA_TIMING_ACTIVE
| ATA_TIMING_RECOVER
|
860 ATA_TIMING_CYCLE
| ATA_TIMING_UDMA
,
866 unsigned int reg
; /* PCI config register to read */
867 unsigned int width
; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
872 extern int ata_pci_init_sff_host(struct ata_host
*host
);
873 extern int ata_pci_init_bmdma(struct ata_host
*host
);
874 extern int ata_pci_prepare_sff_host(struct pci_dev
*pdev
,
875 const struct ata_port_info
* const * ppi
,
876 struct ata_host
**r_host
);
877 extern int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
);
878 extern unsigned long ata_pci_default_filter(struct ata_device
*, unsigned long);
879 #endif /* CONFIG_PCI */
884 extern void ata_eng_timeout(struct ata_port
*ap
);
886 extern void ata_port_schedule_eh(struct ata_port
*ap
);
887 extern int ata_port_abort(struct ata_port
*ap
);
888 extern int ata_port_freeze(struct ata_port
*ap
);
890 extern void ata_eh_freeze_port(struct ata_port
*ap
);
891 extern void ata_eh_thaw_port(struct ata_port
*ap
);
893 extern void ata_eh_qc_complete(struct ata_queued_cmd
*qc
);
894 extern void ata_eh_qc_retry(struct ata_queued_cmd
*qc
);
896 extern void ata_do_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
897 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
898 ata_postreset_fn_t postreset
);
903 #define ata_port_printk(ap, lv, fmt, args...) \
904 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
906 #define ata_dev_printk(dev, lv, fmt, args...) \
907 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args)
910 * ata_eh_info helpers
912 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
913 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
914 ATA_EH_DESC_LEN - (ehi)->desc_len, \
918 #define ata_ehi_clear_desc(ehi) do { \
919 (ehi)->desc[0] = '\0'; \
920 (ehi)->desc_len = 0; \
923 static inline void __ata_ehi_hotplugged(struct ata_eh_info
*ehi
)
925 ehi
->flags
|= ATA_EHI_HOTPLUGGED
| ATA_EHI_RESUME_LINK
;
926 ehi
->action
|= ATA_EH_SOFTRESET
;
927 ehi
->probe_mask
|= (1 << ATA_MAX_DEVICES
) - 1;
930 static inline void ata_ehi_hotplugged(struct ata_eh_info
*ehi
)
932 __ata_ehi_hotplugged(ehi
);
933 ehi
->err_mask
|= AC_ERR_ATA_BUS
;
940 ata_sg_is_last(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
942 if (sg
== &qc
->pad_sgent
)
946 if (((sg
- qc
->__sg
) + 1) == qc
->n_elem
)
951 static inline struct scatterlist
*
952 ata_qc_first_sg(struct ata_queued_cmd
*qc
)
957 return &qc
->pad_sgent
;
961 static inline struct scatterlist
*
962 ata_qc_next_sg(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
964 if (sg
== &qc
->pad_sgent
)
966 if (++sg
- qc
->__sg
< qc
->n_elem
)
969 return &qc
->pad_sgent
;
973 #define ata_for_each_sg(sg, qc) \
974 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
976 static inline unsigned int ata_tag_valid(unsigned int tag
)
978 return (tag
< ATA_MAX_QUEUE
) ? 1 : 0;
981 static inline unsigned int ata_tag_internal(unsigned int tag
)
983 return tag
== ATA_MAX_QUEUE
- 1;
989 static inline unsigned int ata_class_enabled(unsigned int class)
991 return class == ATA_DEV_ATA
|| class == ATA_DEV_ATAPI
;
994 static inline unsigned int ata_class_disabled(unsigned int class)
996 return class == ATA_DEV_ATA_UNSUP
|| class == ATA_DEV_ATAPI_UNSUP
;
999 static inline unsigned int ata_class_absent(unsigned int class)
1001 return !ata_class_enabled(class) && !ata_class_disabled(class);
1004 static inline unsigned int ata_dev_enabled(const struct ata_device
*dev
)
1006 return ata_class_enabled(dev
->class);
1009 static inline unsigned int ata_dev_disabled(const struct ata_device
*dev
)
1011 return ata_class_disabled(dev
->class);
1014 static inline unsigned int ata_dev_absent(const struct ata_device
*dev
)
1016 return ata_class_absent(dev
->class);
1022 static inline int ata_port_max_devices(const struct ata_port
*ap
)
1024 if (ap
->flags
& ATA_FLAG_SLAVE_POSS
)
1030 static inline u8
ata_chk_status(struct ata_port
*ap
)
1032 return ap
->ops
->check_status(ap
);
1036 * ata_ncq_enabled - Test whether NCQ is enabled
1037 * @dev: ATA device to test for
1040 * spin_lock_irqsave(host lock)
1043 * 1 if NCQ is enabled for @dev, 0 otherwise.
1045 static inline int ata_ncq_enabled(struct ata_device
*dev
)
1047 return (dev
->flags
& (ATA_DFLAG_PIO
| ATA_DFLAG_NCQ_OFF
|
1048 ATA_DFLAG_NCQ
)) == ATA_DFLAG_NCQ
;
1052 * ata_pause - Flush writes and pause 400 nanoseconds.
1053 * @ap: Port to wait for.
1056 * Inherited from caller.
1059 static inline void ata_pause(struct ata_port
*ap
)
1067 * ata_busy_wait - Wait for a port status register
1068 * @ap: Port to wait for.
1069 * @bits: bits that must be clear
1070 * @max: number of 10uS waits to perform
1072 * Waits up to max*10 microseconds for the selected bits in the port's
1073 * status register to be cleared.
1074 * Returns final value of status register.
1077 * Inherited from caller.
1080 static inline u8
ata_busy_wait(struct ata_port
*ap
, unsigned int bits
,
1087 status
= ata_chk_status(ap
);
1089 } while (status
!= 0xff && (status
& bits
) && (max
> 0));
1096 * ata_wait_idle - Wait for a port to be idle.
1097 * @ap: Port to wait for.
1099 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1100 * Returns final value of status register.
1103 * Inherited from caller.
1106 static inline u8
ata_wait_idle(struct ata_port
*ap
)
1108 u8 status
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 1000);
1110 if (status
!= 0xff && (status
& (ATA_BUSY
| ATA_DRQ
)))
1111 DPRINTK("ATA: abnormal status 0x%X on port 0x%p\n",
1112 status
, ap
->ioaddr
.status_addr
);
1117 static inline void ata_qc_set_polling(struct ata_queued_cmd
*qc
)
1119 qc
->tf
.ctl
|= ATA_NIEN
;
1122 static inline struct ata_queued_cmd
*__ata_qc_from_tag(struct ata_port
*ap
,
1125 if (likely(ata_tag_valid(tag
)))
1126 return &ap
->qcmd
[tag
];
1130 static inline struct ata_queued_cmd
*ata_qc_from_tag(struct ata_port
*ap
,
1133 struct ata_queued_cmd
*qc
= __ata_qc_from_tag(ap
, tag
);
1135 if (unlikely(!qc
) || !ap
->ops
->error_handler
)
1138 if ((qc
->flags
& (ATA_QCFLAG_ACTIVE
|
1139 ATA_QCFLAG_FAILED
)) == ATA_QCFLAG_ACTIVE
)
1145 static inline void ata_tf_init(struct ata_device
*dev
, struct ata_taskfile
*tf
)
1147 memset(tf
, 0, sizeof(*tf
));
1149 tf
->ctl
= dev
->ap
->ctl
;
1150 if (dev
->devno
== 0)
1151 tf
->device
= ATA_DEVICE_OBS
;
1153 tf
->device
= ATA_DEVICE_OBS
| ATA_DEV1
;
1156 static inline void ata_qc_reinit(struct ata_queued_cmd
*qc
)
1158 qc
->dma_dir
= DMA_NONE
;
1161 qc
->cursg
= qc
->cursg_ofs
= 0;
1162 qc
->nbytes
= qc
->curbytes
= 0;
1166 qc
->sect_size
= ATA_SECT_SIZE
;
1168 ata_tf_init(qc
->dev
, &qc
->tf
);
1170 /* init result_tf such that it indicates normal completion */
1171 qc
->result_tf
.command
= ATA_DRDY
;
1172 qc
->result_tf
.feature
= 0;
1175 static inline int ata_try_flush_cache(const struct ata_device
*dev
)
1177 return ata_id_wcache_enabled(dev
->id
) ||
1178 ata_id_has_flush(dev
->id
) ||
1179 ata_id_has_flush_ext(dev
->id
);
1182 static inline unsigned int ac_err_mask(u8 status
)
1184 if (status
& (ATA_BUSY
| ATA_DRQ
))
1186 if (status
& (ATA_ERR
| ATA_DF
))
1191 static inline unsigned int __ac_err_mask(u8 status
)
1193 unsigned int mask
= ac_err_mask(status
);
1195 return AC_ERR_OTHER
;
1199 static inline int ata_pad_alloc(struct ata_port
*ap
, struct device
*dev
)
1202 ap
->pad
= dmam_alloc_coherent(dev
, ATA_DMA_PAD_BUF_SZ
,
1203 &ap
->pad_dma
, GFP_KERNEL
);
1204 return (ap
->pad
== NULL
) ? -ENOMEM
: 0;
1207 static inline void ata_pad_free(struct ata_port
*ap
, struct device
*dev
)
1209 dmam_free_coherent(dev
, ATA_DMA_PAD_BUF_SZ
, ap
->pad
, ap
->pad_dma
);
1212 static inline struct ata_port
*ata_shost_to_port(struct Scsi_Host
*host
)
1214 return *(struct ata_port
**)&host
->hostdata
[0];
1217 #endif /* __LINUX_LIBATA_H__ */