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/dma-mapping.h>
32 #include <linux/scatterlist.h>
34 #include <linux/ata.h>
35 #include <linux/workqueue.h>
36 #include <scsi/scsi_host.h>
37 #include <linux/acpi.h>
40 * Define if arch has non-standard setup. This is a _PCI_ standard
41 * not a legacy or ISA standard.
43 #ifdef CONFIG_ATA_NONSTANDARD
44 #include <asm/libata-portmap.h>
46 #include <asm-generic/libata-portmap.h>
50 * compile-time options: to be removed as soon as all the drivers are
51 * converted to the new debugging mechanism
53 #undef ATA_DEBUG /* debugging output */
54 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
55 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
56 #undef ATA_NDEBUG /* define to disable quick runtime checks */
59 /* note: prints function name for you */
61 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
62 #ifdef ATA_VERBOSE_DEBUG
63 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65 #define VPRINTK(fmt, args...)
66 #endif /* ATA_VERBOSE_DEBUG */
68 #define DPRINTK(fmt, args...)
69 #define VPRINTK(fmt, args...)
70 #endif /* ATA_DEBUG */
72 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
74 /* NEW: debug levels */
75 #define HAVE_LIBATA_MSG 1
79 ATA_MSG_INFO
= 0x0002,
80 ATA_MSG_PROBE
= 0x0004,
81 ATA_MSG_WARN
= 0x0008,
82 ATA_MSG_MALLOC
= 0x0010,
84 ATA_MSG_INTR
= 0x0040,
88 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
89 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
90 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
91 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
92 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
93 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
94 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
95 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
97 static inline u32
ata_msg_init(int dval
, int default_msg_enable_bits
)
99 if (dval
< 0 || dval
>= (sizeof(u32
) * 8))
100 return default_msg_enable_bits
; /* should be 0x1 - only driver info msgs */
103 return (1 << dval
) - 1;
106 /* defines only for the constants which don't work well as enums */
107 #define ATA_TAG_POISON 0xfafbfcfdU
110 /* various global constants */
111 LIBATA_MAX_PRD
= ATA_MAX_PRD
/ 2,
112 LIBATA_DUMB_MAX_PRD
= ATA_MAX_PRD
/ 4, /* Worst case */
115 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
117 ATA_TAG_INTERNAL
= ATA_MAX_QUEUE
- 1,
119 ATA_DEF_BUSY_WAIT
= 10000,
120 ATA_SHORT_PAUSE
= (HZ
>> 6) + 1,
122 ATA_SHT_EMULATED
= 1,
123 ATA_SHT_CMD_PER_LUN
= 1,
124 ATA_SHT_THIS_ID
= -1,
125 ATA_SHT_USE_CLUSTERING
= 1,
127 /* struct ata_device stuff */
128 ATA_DFLAG_LBA
= (1 << 0), /* device supports LBA */
129 ATA_DFLAG_LBA48
= (1 << 1), /* device supports LBA48 */
130 ATA_DFLAG_CDB_INTR
= (1 << 2), /* device asserts INTRQ when ready for CDB */
131 ATA_DFLAG_NCQ
= (1 << 3), /* device supports NCQ */
132 ATA_DFLAG_FLUSH_EXT
= (1 << 4), /* do FLUSH_EXT instead of FLUSH */
133 ATA_DFLAG_ACPI_PENDING
= (1 << 5), /* ACPI resume action pending */
134 ATA_DFLAG_ACPI_FAILED
= (1 << 6), /* ACPI on devcfg has failed */
135 ATA_DFLAG_AN
= (1 << 7), /* AN configured */
136 ATA_DFLAG_CFG_MASK
= (1 << 12) - 1,
138 ATA_DFLAG_PIO
= (1 << 12), /* device limited to PIO mode */
139 ATA_DFLAG_NCQ_OFF
= (1 << 13), /* device limited to non-NCQ mode */
140 ATA_DFLAG_SPUNDOWN
= (1 << 14), /* XXX: for spindown_compat */
141 ATA_DFLAG_INIT_MASK
= (1 << 16) - 1,
143 ATA_DFLAG_DETACH
= (1 << 16),
144 ATA_DFLAG_DETACHED
= (1 << 17),
146 ATA_DEV_UNKNOWN
= 0, /* unknown device */
147 ATA_DEV_ATA
= 1, /* ATA device */
148 ATA_DEV_ATA_UNSUP
= 2, /* ATA device (unsupported) */
149 ATA_DEV_ATAPI
= 3, /* ATAPI device */
150 ATA_DEV_ATAPI_UNSUP
= 4, /* ATAPI device (unsupported) */
151 ATA_DEV_PMP
= 5, /* SATA port multiplier */
152 ATA_DEV_PMP_UNSUP
= 6, /* SATA port multiplier (unsupported) */
153 ATA_DEV_SEMB
= 7, /* SEMB */
154 ATA_DEV_SEMB_UNSUP
= 8, /* SEMB (unsupported) */
155 ATA_DEV_NONE
= 9, /* no device */
157 /* struct ata_link flags */
158 ATA_LFLAG_HRST_TO_RESUME
= (1 << 0), /* hardreset to resume link */
159 ATA_LFLAG_SKIP_D2H_BSY
= (1 << 1), /* can't wait for the first D2H
160 * Register FIS clearing BSY */
161 ATA_LFLAG_NO_SRST
= (1 << 2), /* avoid softreset */
162 ATA_LFLAG_ASSUME_ATA
= (1 << 3), /* assume ATA class */
163 ATA_LFLAG_ASSUME_SEMB
= (1 << 4), /* assume SEMB class */
164 ATA_LFLAG_ASSUME_CLASS
= ATA_LFLAG_ASSUME_ATA
| ATA_LFLAG_ASSUME_SEMB
,
165 ATA_LFLAG_NO_RETRY
= (1 << 5), /* don't retry this link */
166 ATA_LFLAG_DISABLED
= (1 << 6), /* link is disabled */
168 /* struct ata_port flags */
169 ATA_FLAG_SLAVE_POSS
= (1 << 0), /* host supports slave dev */
170 /* (doesn't imply presence) */
171 ATA_FLAG_SATA
= (1 << 1),
172 ATA_FLAG_NO_LEGACY
= (1 << 2), /* no legacy mode check */
173 ATA_FLAG_MMIO
= (1 << 3), /* use MMIO, not PIO */
174 ATA_FLAG_SRST
= (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
175 ATA_FLAG_SATA_RESET
= (1 << 5), /* (obsolete) use COMRESET */
176 ATA_FLAG_NO_ATAPI
= (1 << 6), /* No ATAPI support */
177 ATA_FLAG_PIO_DMA
= (1 << 7), /* PIO cmds via DMA */
178 ATA_FLAG_PIO_LBA48
= (1 << 8), /* Host DMA engine is LBA28 only */
179 ATA_FLAG_PIO_POLLING
= (1 << 9), /* use polling PIO if LLD
180 * doesn't handle PIO interrupts */
181 ATA_FLAG_NCQ
= (1 << 10), /* host supports NCQ */
182 ATA_FLAG_DEBUGMSG
= (1 << 13),
183 ATA_FLAG_IGN_SIMPLEX
= (1 << 15), /* ignore SIMPLEX */
184 ATA_FLAG_NO_IORDY
= (1 << 16), /* controller lacks iordy */
185 ATA_FLAG_ACPI_SATA
= (1 << 17), /* need native SATA ACPI layout */
186 ATA_FLAG_AN
= (1 << 18), /* controller supports AN */
187 ATA_FLAG_PMP
= (1 << 19), /* controller supports PMP */
189 /* The following flag belongs to ap->pflags but is kept in
190 * ap->flags because it's referenced in many LLDs and will be
191 * removed in not-too-distant future.
193 ATA_FLAG_DISABLED
= (1 << 23), /* port is disabled, ignore it */
195 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
197 /* struct ata_port pflags */
198 ATA_PFLAG_EH_PENDING
= (1 << 0), /* EH pending */
199 ATA_PFLAG_EH_IN_PROGRESS
= (1 << 1), /* EH in progress */
200 ATA_PFLAG_FROZEN
= (1 << 2), /* port is frozen */
201 ATA_PFLAG_RECOVERED
= (1 << 3), /* recovery action performed */
202 ATA_PFLAG_LOADING
= (1 << 4), /* boot/loading probe */
203 ATA_PFLAG_UNLOADING
= (1 << 5), /* module is unloading */
204 ATA_PFLAG_SCSI_HOTPLUG
= (1 << 6), /* SCSI hotplug scheduled */
205 ATA_PFLAG_INITIALIZING
= (1 << 7), /* being initialized, don't touch */
206 ATA_PFLAG_RESETTING
= (1 << 8), /* reset in progress */
208 ATA_PFLAG_SUSPENDED
= (1 << 17), /* port is suspended (power) */
209 ATA_PFLAG_PM_PENDING
= (1 << 18), /* PM operation pending */
210 ATA_PFLAG_GTM_VALID
= (1 << 19), /* acpi_gtm data valid */
212 /* struct ata_queued_cmd flags */
213 ATA_QCFLAG_ACTIVE
= (1 << 0), /* cmd not yet ack'd to scsi lyer */
214 ATA_QCFLAG_SG
= (1 << 1), /* have s/g table? */
215 ATA_QCFLAG_SINGLE
= (1 << 2), /* no s/g, just a single buffer */
216 ATA_QCFLAG_DMAMAP
= ATA_QCFLAG_SG
| ATA_QCFLAG_SINGLE
,
217 ATA_QCFLAG_IO
= (1 << 3), /* standard IO command */
218 ATA_QCFLAG_RESULT_TF
= (1 << 4), /* result TF requested */
219 ATA_QCFLAG_CLEAR_EXCL
= (1 << 5), /* clear excl_link on completion */
221 ATA_QCFLAG_FAILED
= (1 << 16), /* cmd failed and is owned by EH */
222 ATA_QCFLAG_SENSE_VALID
= (1 << 17), /* sense data valid */
223 ATA_QCFLAG_EH_SCHEDULED
= (1 << 18), /* EH scheduled (obsolete) */
226 ATA_HOST_SIMPLEX
= (1 << 0), /* Host is simplex, one DMA channel per host only */
227 ATA_HOST_STARTED
= (1 << 1), /* Host started */
229 /* bits 24:31 of host->flags are reserved for LLD specific flags */
231 /* various lengths of time */
232 ATA_TMOUT_BOOT
= 30 * HZ
, /* heuristic */
233 ATA_TMOUT_BOOT_QUICK
= 7 * HZ
, /* heuristic */
234 ATA_TMOUT_INTERNAL
= 30 * HZ
,
235 ATA_TMOUT_INTERNAL_QUICK
= 5 * HZ
,
249 /* SATA port states */
254 /* encoding various smaller bitmaps into a single
255 * unsigned int bitmap
262 ATA_SHIFT_MWDMA
= ATA_SHIFT_PIO
+ ATA_BITS_PIO
,
263 ATA_SHIFT_UDMA
= ATA_SHIFT_MWDMA
+ ATA_BITS_MWDMA
,
265 ATA_MASK_PIO
= ((1 << ATA_BITS_PIO
) - 1) << ATA_SHIFT_PIO
,
266 ATA_MASK_MWDMA
= ((1 << ATA_BITS_MWDMA
) - 1) << ATA_SHIFT_MWDMA
,
267 ATA_MASK_UDMA
= ((1 << ATA_BITS_UDMA
) - 1) << ATA_SHIFT_UDMA
,
269 /* size of buffer to pad xfers ending on unaligned boundaries */
271 ATA_DMA_PAD_BUF_SZ
= ATA_DMA_PAD_SZ
* ATA_MAX_QUEUE
,
276 /* return values for ->qc_defer */
280 /* desc_len for ata_eh_info and context */
281 ATA_EH_DESC_LEN
= 80,
283 /* reset / recovery action types */
284 ATA_EH_REVALIDATE
= (1 << 0),
285 ATA_EH_SOFTRESET
= (1 << 1),
286 ATA_EH_HARDRESET
= (1 << 2),
287 ATA_EH_ENABLE_LINK
= (1 << 3),
289 ATA_EH_RESET_MASK
= ATA_EH_SOFTRESET
| ATA_EH_HARDRESET
,
290 ATA_EH_PERDEV_MASK
= ATA_EH_REVALIDATE
,
292 /* ata_eh_info->flags */
293 ATA_EHI_HOTPLUGGED
= (1 << 0), /* could have been hotplugged */
294 ATA_EHI_RESUME_LINK
= (1 << 1), /* resume link (reset modifier) */
295 ATA_EHI_NO_AUTOPSY
= (1 << 2), /* no autopsy */
296 ATA_EHI_QUIET
= (1 << 3), /* be quiet */
298 ATA_EHI_DID_SOFTRESET
= (1 << 16), /* already soft-reset this port */
299 ATA_EHI_DID_HARDRESET
= (1 << 17), /* already soft-reset this port */
300 ATA_EHI_PRINTINFO
= (1 << 18), /* print configuration info */
301 ATA_EHI_SETMODE
= (1 << 19), /* configure transfer mode */
302 ATA_EHI_POST_SETMODE
= (1 << 20), /* revaildating after setmode */
304 ATA_EHI_DID_RESET
= ATA_EHI_DID_SOFTRESET
| ATA_EHI_DID_HARDRESET
,
305 ATA_EHI_RESET_MODIFIER_MASK
= ATA_EHI_RESUME_LINK
,
307 /* max tries if error condition is still set after ->error_handler */
308 ATA_EH_MAX_TRIES
= 5,
310 /* how hard are we gonna try to probe/recover devices */
311 ATA_PROBE_MAX_TRIES
= 3,
312 ATA_EH_DEV_TRIES
= 3,
313 ATA_EH_PMP_TRIES
= 5,
314 ATA_EH_PMP_LINK_TRIES
= 3,
316 SATA_PMP_SCR_TIMEOUT
= 250,
318 /* Horkage types. May be set by libata or controller on drives
319 (some horkage may be drive/controller pair dependant */
321 ATA_HORKAGE_DIAGNOSTIC
= (1 << 0), /* Failed boot diag */
322 ATA_HORKAGE_NODMA
= (1 << 1), /* DMA problems */
323 ATA_HORKAGE_NONCQ
= (1 << 2), /* Don't use NCQ */
324 ATA_HORKAGE_MAX_SEC_128
= (1 << 3), /* Limit max sects to 128 */
325 ATA_HORKAGE_BROKEN_HPA
= (1 << 4), /* Broken HPA */
326 ATA_HORKAGE_SKIP_PM
= (1 << 5), /* Skip PM operations */
327 ATA_HORKAGE_HPA_SIZE
= (1 << 6), /* native size off by one */
329 /* DMA mask for user DMA control: User visible values; DO NOT
331 ATA_DMA_MASK_ATA
= (1 << 0), /* DMA on ATA Disk */
332 ATA_DMA_MASK_ATAPI
= (1 << 1), /* DMA on ATAPI */
333 ATA_DMA_MASK_CFA
= (1 << 2), /* DMA on CF Card */
336 enum hsm_task_states
{
337 HSM_ST_IDLE
, /* no command on going */
338 HSM_ST_FIRST
, /* (waiting the device to)
339 write CDB or first data block */
340 HSM_ST
, /* (waiting the device to) transfer data */
341 HSM_ST_LAST
, /* (waiting the device to) complete command */
342 HSM_ST_ERR
, /* error */
345 enum ata_completion_errors
{
346 AC_ERR_DEV
= (1 << 0), /* device reported error */
347 AC_ERR_HSM
= (1 << 1), /* host state machine violation */
348 AC_ERR_TIMEOUT
= (1 << 2), /* timeout */
349 AC_ERR_MEDIA
= (1 << 3), /* media error */
350 AC_ERR_ATA_BUS
= (1 << 4), /* ATA bus error */
351 AC_ERR_HOST_BUS
= (1 << 5), /* host bus error */
352 AC_ERR_SYSTEM
= (1 << 6), /* system error */
353 AC_ERR_INVALID
= (1 << 7), /* invalid argument */
354 AC_ERR_OTHER
= (1 << 8), /* unknown */
355 AC_ERR_NODEV_HINT
= (1 << 9), /* polling device detection hint */
356 AC_ERR_NCQ
= (1 << 10), /* marker for offending NCQ qc */
359 /* forward declarations */
361 struct ata_port_operations
;
364 struct ata_queued_cmd
;
367 typedef void (*ata_qc_cb_t
) (struct ata_queued_cmd
*qc
);
368 typedef int (*ata_prereset_fn_t
)(struct ata_link
*link
, unsigned long deadline
);
369 typedef int (*ata_reset_fn_t
)(struct ata_link
*link
, unsigned int *classes
,
370 unsigned long deadline
);
371 typedef void (*ata_postreset_fn_t
)(struct ata_link
*link
, unsigned int *classes
);
374 void __iomem
*cmd_addr
;
375 void __iomem
*data_addr
;
376 void __iomem
*error_addr
;
377 void __iomem
*feature_addr
;
378 void __iomem
*nsect_addr
;
379 void __iomem
*lbal_addr
;
380 void __iomem
*lbam_addr
;
381 void __iomem
*lbah_addr
;
382 void __iomem
*device_addr
;
383 void __iomem
*status_addr
;
384 void __iomem
*command_addr
;
385 void __iomem
*altstatus_addr
;
386 void __iomem
*ctl_addr
;
387 void __iomem
*bmdma_addr
;
388 void __iomem
*scr_addr
;
394 void __iomem
* const *iomap
;
395 unsigned int n_ports
;
397 const struct ata_port_operations
*ops
;
399 #ifdef CONFIG_ATA_ACPI
400 acpi_handle acpi_handle
;
402 struct ata_port
*simplex_claimed
; /* channel owning the DMA */
403 struct ata_port
*ports
[0];
406 struct ata_queued_cmd
{
408 struct ata_device
*dev
;
410 struct scsi_cmnd
*scsicmd
;
411 void (*scsidone
)(struct scsi_cmnd
*);
413 struct ata_taskfile tf
;
414 u8 cdb
[ATAPI_CDB_LEN
];
416 unsigned long flags
; /* ATA_QCFLAG_xxx */
420 unsigned int orig_n_elem
;
424 unsigned int pad_len
;
425 unsigned int sect_size
;
428 unsigned int curbytes
;
430 struct scatterlist
*cursg
;
431 unsigned int cursg_ofs
;
433 struct scatterlist sgent
;
434 struct scatterlist pad_sgent
;
437 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
438 struct scatterlist
*__sg
;
440 unsigned int err_mask
;
441 struct ata_taskfile result_tf
;
442 ata_qc_cb_t complete_fn
;
448 struct ata_port_stats
{
449 unsigned long unhandled_irq
;
450 unsigned long idle_irq
;
451 unsigned long rw_reqbuf
;
454 struct ata_ering_entry
{
456 unsigned int err_mask
;
462 struct ata_ering_entry ring
[ATA_ERING_SIZE
];
466 struct ata_link
*link
;
467 unsigned int devno
; /* 0 or 1 */
468 unsigned long flags
; /* ATA_DFLAG_xxx */
469 unsigned int horkage
; /* List of broken features */
470 struct scsi_device
*sdev
; /* attached SCSI device */
471 #ifdef CONFIG_ATA_ACPI
472 acpi_handle acpi_handle
;
474 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
475 u64 n_sectors
; /* size of device, if ATA */
476 unsigned int class; /* ATA_DEV_xxx */
479 u16 id
[ATA_ID_WORDS
]; /* IDENTIFY xxx DEVICE data */
480 u32 gscr
[SATA_PMP_GSCR_DWORDS
]; /* PMP GSCR block */
486 unsigned int xfer_shift
; /* ATA_SHIFT_xxx */
488 unsigned int multi_count
; /* sectors count for
489 READ/WRITE MULTIPLE */
490 unsigned int max_sectors
; /* per-device max sectors */
491 unsigned int cdb_len
;
493 /* per-dev xfer mask */
494 unsigned int pio_mask
;
495 unsigned int mwdma_mask
;
496 unsigned int udma_mask
;
498 /* for CHS addressing */
499 u16 cylinders
; /* Number of cylinders */
500 u16 heads
; /* Number of heads */
501 u16 sectors
; /* Number of sectors per track */
504 struct ata_ering ering
;
508 /* Offset into struct ata_device. Fields above it are maintained
509 * acress device init. Fields below are zeroed.
511 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
514 struct ata_device
*dev
; /* offending device */
515 u32 serror
; /* SError from LLDD */
516 unsigned int err_mask
; /* port-wide err_mask */
517 unsigned int action
; /* ATA_EH_* action mask */
518 unsigned int dev_action
[ATA_MAX_DEVICES
]; /* dev EH action */
519 unsigned int flags
; /* ATA_EHI_* flags */
521 unsigned int probe_mask
;
523 char desc
[ATA_EH_DESC_LEN
];
527 struct ata_eh_context
{
528 struct ata_eh_info i
;
529 int tries
[ATA_MAX_DEVICES
];
530 unsigned int classes
[ATA_MAX_DEVICES
];
531 unsigned int did_probe_mask
;
534 struct ata_acpi_drive
540 struct ata_acpi_gtm
{
541 struct ata_acpi_drive drive
[2];
547 int pmp
; /* port multiplier port # */
549 unsigned int active_tag
; /* active tag on this link */
550 u32 sactive
; /* active NCQ commands */
552 unsigned int flags
; /* ATA_LFLAG_xxx */
554 unsigned int hw_sata_spd_limit
;
555 unsigned int sata_spd_limit
;
556 unsigned int sata_spd
; /* current SATA PHY speed */
558 /* record runtime error info, protected by host_set lock */
559 struct ata_eh_info eh_info
;
561 struct ata_eh_context eh_context
;
563 struct ata_device device
[ATA_MAX_DEVICES
];
567 struct Scsi_Host
*scsi_host
; /* our co-allocated scsi host */
568 const struct ata_port_operations
*ops
;
570 unsigned long flags
; /* ATA_FLAG_xxx */
571 unsigned int pflags
; /* ATA_PFLAG_xxx */
572 unsigned int print_id
; /* user visible unique port ID */
573 unsigned int port_no
; /* 0 based port no. inside the host */
575 struct ata_prd
*prd
; /* our SG list */
576 dma_addr_t prd_dma
; /* and its DMA mapping */
578 void *pad
; /* array of DMA pad buffers */
581 struct ata_ioports ioaddr
; /* ATA cmd/ctl/dma register blocks */
583 u8 ctl
; /* cache of ATA control register */
584 u8 last_ctl
; /* Cache last written value */
585 unsigned int pio_mask
;
586 unsigned int mwdma_mask
;
587 unsigned int udma_mask
;
588 unsigned int cbl
; /* cable type; ATA_CBL_xxx */
590 struct ata_queued_cmd qcmd
[ATA_MAX_QUEUE
];
591 unsigned long qc_allocated
;
592 unsigned int qc_active
;
593 int nr_active_links
; /* #links with active qcs */
595 struct ata_link link
; /* host default link */
597 int nr_pmp_links
; /* nr of available PMP links */
598 struct ata_link
*pmp_link
; /* array of PMP links */
599 struct ata_link
*excl_link
; /* for PMP qc exclusion */
601 struct ata_port_stats stats
;
602 struct ata_host
*host
;
605 void *port_task_data
;
606 struct delayed_work port_task
;
607 struct delayed_work hotplug_task
;
608 struct work_struct scsi_rescan_task
;
610 unsigned int hsm_task_state
;
613 struct list_head eh_done_q
;
614 wait_queue_head_t eh_wait_q
;
617 pm_message_t pm_mesg
;
620 struct timer_list fastdrain_timer
;
621 unsigned long fastdrain_cnt
;
625 #ifdef CONFIG_ATA_ACPI
626 acpi_handle acpi_handle
;
627 struct ata_acpi_gtm acpi_gtm
;
629 u8 sector_buf
[ATA_SECT_SIZE
]; /* owned by EH */
632 struct ata_port_operations
{
633 void (*dev_config
) (struct ata_device
*);
635 void (*set_piomode
) (struct ata_port
*, struct ata_device
*);
636 void (*set_dmamode
) (struct ata_port
*, struct ata_device
*);
637 unsigned long (*mode_filter
) (struct ata_device
*, unsigned long);
639 void (*tf_load
) (struct ata_port
*ap
, const struct ata_taskfile
*tf
);
640 void (*tf_read
) (struct ata_port
*ap
, struct ata_taskfile
*tf
);
642 void (*exec_command
)(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
643 u8 (*check_status
)(struct ata_port
*ap
);
644 u8 (*check_altstatus
)(struct ata_port
*ap
);
645 void (*dev_select
)(struct ata_port
*ap
, unsigned int device
);
647 void (*phy_reset
) (struct ata_port
*ap
); /* obsolete */
648 int (*set_mode
) (struct ata_link
*link
, struct ata_device
**r_failed_dev
);
650 int (*cable_detect
) (struct ata_port
*ap
);
652 int (*check_atapi_dma
) (struct ata_queued_cmd
*qc
);
654 void (*bmdma_setup
) (struct ata_queued_cmd
*qc
);
655 void (*bmdma_start
) (struct ata_queued_cmd
*qc
);
657 void (*data_xfer
) (struct ata_device
*, unsigned char *, unsigned int, int);
659 int (*qc_defer
) (struct ata_queued_cmd
*qc
);
660 void (*qc_prep
) (struct ata_queued_cmd
*qc
);
661 unsigned int (*qc_issue
) (struct ata_queued_cmd
*qc
);
663 /* port multiplier */
664 void (*pmp_attach
) (struct ata_port
*ap
);
665 void (*pmp_detach
) (struct ata_port
*ap
);
667 /* Error handlers. ->error_handler overrides ->eng_timeout and
668 * indicates that new-style EH is in place.
670 void (*eng_timeout
) (struct ata_port
*ap
); /* obsolete */
672 void (*freeze
) (struct ata_port
*ap
);
673 void (*thaw
) (struct ata_port
*ap
);
674 void (*error_handler
) (struct ata_port
*ap
);
675 void (*post_internal_cmd
) (struct ata_queued_cmd
*qc
);
677 irq_handler_t irq_handler
;
678 void (*irq_clear
) (struct ata_port
*);
679 u8 (*irq_on
) (struct ata_port
*);
681 int (*scr_read
) (struct ata_port
*ap
, unsigned int sc_reg
, u32
*val
);
682 int (*scr_write
) (struct ata_port
*ap
, unsigned int sc_reg
, u32 val
);
684 int (*port_suspend
) (struct ata_port
*ap
, pm_message_t mesg
);
685 int (*port_resume
) (struct ata_port
*ap
);
687 int (*port_start
) (struct ata_port
*ap
);
688 void (*port_stop
) (struct ata_port
*ap
);
690 void (*host_stop
) (struct ata_host
*host
);
692 void (*bmdma_stop
) (struct ata_queued_cmd
*qc
);
693 u8 (*bmdma_status
) (struct ata_port
*ap
);
696 struct ata_port_info
{
697 struct scsi_host_template
*sht
;
699 unsigned long link_flags
;
700 unsigned long pio_mask
;
701 unsigned long mwdma_mask
;
702 unsigned long udma_mask
;
703 const struct ata_port_operations
*port_ops
;
704 irq_handler_t irq_handler
;
709 unsigned short mode
; /* ATA mode */
710 unsigned short setup
; /* t1 */
711 unsigned short act8b
; /* t2 for 8-bit I/O */
712 unsigned short rec8b
; /* t2i for 8-bit I/O */
713 unsigned short cyc8b
; /* t0 for 8-bit I/O */
714 unsigned short active
; /* t2 or tD */
715 unsigned short recover
; /* t2i or tK */
716 unsigned short cycle
; /* t0 */
717 unsigned short udma
; /* t2CYCTYP/2 */
720 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
722 extern const unsigned long sata_deb_timing_normal
[];
723 extern const unsigned long sata_deb_timing_hotplug
[];
724 extern const unsigned long sata_deb_timing_long
[];
726 extern const struct ata_port_operations ata_dummy_port_ops
;
727 extern const struct ata_port_info ata_dummy_port_info
;
729 static inline const unsigned long *
730 sata_ehc_deb_timing(struct ata_eh_context
*ehc
)
732 if (ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
)
733 return sata_deb_timing_hotplug
;
735 return sata_deb_timing_normal
;
738 static inline int ata_port_is_dummy(struct ata_port
*ap
)
740 return ap
->ops
== &ata_dummy_port_ops
;
743 extern void sata_print_link_status(struct ata_link
*link
);
744 extern void ata_port_probe(struct ata_port
*);
745 extern void __sata_phy_reset(struct ata_port
*ap
);
746 extern void sata_phy_reset(struct ata_port
*ap
);
747 extern void ata_bus_reset(struct ata_port
*ap
);
748 extern int sata_set_spd(struct ata_link
*link
);
749 extern int sata_link_debounce(struct ata_link
*link
,
750 const unsigned long *params
, unsigned long deadline
);
751 extern int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
752 unsigned long deadline
);
753 extern int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
);
754 extern int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
755 unsigned long deadline
);
756 extern int sata_link_hardreset(struct ata_link
*link
,
757 const unsigned long *timing
, unsigned long deadline
);
758 extern int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
759 unsigned long deadline
);
760 extern void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
);
761 extern void ata_port_disable(struct ata_port
*);
762 extern void ata_std_ports(struct ata_ioports
*ioaddr
);
764 extern struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
);
765 extern struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
766 const struct ata_port_info
* const * ppi
, int n_ports
);
767 extern int ata_host_start(struct ata_host
*host
);
768 extern int ata_host_register(struct ata_host
*host
,
769 struct scsi_host_template
*sht
);
770 extern int ata_host_activate(struct ata_host
*host
, int irq
,
771 irq_handler_t irq_handler
, unsigned long irq_flags
,
772 struct scsi_host_template
*sht
);
773 extern void ata_host_detach(struct ata_host
*host
);
774 extern void ata_host_init(struct ata_host
*, struct device
*,
775 unsigned long, const struct ata_port_operations
*);
776 extern int ata_scsi_detect(struct scsi_host_template
*sht
);
777 extern int ata_scsi_ioctl(struct scsi_device
*dev
, int cmd
, void __user
*arg
);
778 extern int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*));
779 extern void ata_sas_port_destroy(struct ata_port
*);
780 extern struct ata_port
*ata_sas_port_alloc(struct ata_host
*,
781 struct ata_port_info
*, struct Scsi_Host
*);
782 extern int ata_sas_port_init(struct ata_port
*);
783 extern int ata_sas_port_start(struct ata_port
*ap
);
784 extern void ata_sas_port_stop(struct ata_port
*ap
);
785 extern int ata_sas_slave_configure(struct scsi_device
*, struct ata_port
*);
786 extern int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
787 struct ata_port
*ap
);
788 extern unsigned int ata_host_intr(struct ata_port
*ap
, struct ata_queued_cmd
*qc
);
789 extern int sata_scr_valid(struct ata_link
*link
);
790 extern int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
);
791 extern int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
);
792 extern int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
);
793 extern int ata_link_online(struct ata_link
*link
);
794 extern int ata_link_offline(struct ata_link
*link
);
796 extern int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
);
797 extern void ata_host_resume(struct ata_host
*host
);
799 extern int ata_ratelimit(void);
800 extern int ata_busy_sleep(struct ata_port
*ap
,
801 unsigned long timeout_pat
, unsigned long timeout
);
802 extern int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
);
803 extern void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
,
804 void *data
, unsigned long delay
);
805 extern u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
806 unsigned long interval_msec
,
807 unsigned long timeout_msec
);
808 extern unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
812 * Default driver ops implementations
814 extern void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
815 extern void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
);
816 extern void ata_tf_to_fis(const struct ata_taskfile
*tf
,
817 u8 pmp
, int is_cmd
, u8
*fis
);
818 extern void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
);
819 extern void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
);
820 extern void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
);
821 extern u8
ata_check_status(struct ata_port
*ap
);
822 extern u8
ata_altstatus(struct ata_port
*ap
);
823 extern void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
824 extern int ata_port_start (struct ata_port
*ap
);
825 extern int ata_sff_port_start (struct ata_port
*ap
);
826 extern irqreturn_t
ata_interrupt (int irq
, void *dev_instance
);
827 extern void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
828 unsigned int buflen
, int write_data
);
829 extern void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
830 unsigned int buflen
, int write_data
);
831 extern int ata_std_qc_defer(struct ata_queued_cmd
*qc
);
832 extern void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
);
833 extern void ata_qc_prep(struct ata_queued_cmd
*qc
);
834 extern void ata_noop_qc_prep(struct ata_queued_cmd
*qc
);
835 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
);
836 extern void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
,
837 unsigned int buflen
);
838 extern void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
839 unsigned int n_elem
);
840 extern unsigned int ata_dev_classify(const struct ata_taskfile
*tf
);
841 extern void ata_dev_disable(struct ata_device
*adev
);
842 extern void ata_id_string(const u16
*id
, unsigned char *s
,
843 unsigned int ofs
, unsigned int len
);
844 extern void ata_id_c_string(const u16
*id
, unsigned char *s
,
845 unsigned int ofs
, unsigned int len
);
846 extern void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
);
847 extern void ata_bmdma_setup (struct ata_queued_cmd
*qc
);
848 extern void ata_bmdma_start (struct ata_queued_cmd
*qc
);
849 extern void ata_bmdma_stop(struct ata_queued_cmd
*qc
);
850 extern u8
ata_bmdma_status(struct ata_port
*ap
);
851 extern void ata_bmdma_irq_clear(struct ata_port
*ap
);
852 extern void ata_bmdma_freeze(struct ata_port
*ap
);
853 extern void ata_bmdma_thaw(struct ata_port
*ap
);
854 extern void ata_bmdma_drive_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
855 ata_reset_fn_t softreset
,
856 ata_reset_fn_t hardreset
,
857 ata_postreset_fn_t postreset
);
858 extern void ata_bmdma_error_handler(struct ata_port
*ap
);
859 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd
*qc
);
860 extern int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
861 u8 status
, int in_wq
);
862 extern void ata_qc_complete(struct ata_queued_cmd
*qc
);
863 extern int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
864 void (*finish_qc
)(struct ata_queued_cmd
*));
865 extern void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
866 void (*done
)(struct scsi_cmnd
*));
867 extern int ata_std_bios_param(struct scsi_device
*sdev
,
868 struct block_device
*bdev
,
869 sector_t capacity
, int geom
[]);
870 extern int ata_scsi_slave_config(struct scsi_device
*sdev
);
871 extern void ata_scsi_slave_destroy(struct scsi_device
*sdev
);
872 extern int ata_scsi_change_queue_depth(struct scsi_device
*sdev
,
874 extern struct ata_device
*ata_dev_pair(struct ata_device
*adev
);
875 extern int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
);
876 extern u8
ata_irq_on(struct ata_port
*ap
);
878 extern int ata_cable_40wire(struct ata_port
*ap
);
879 extern int ata_cable_80wire(struct ata_port
*ap
);
880 extern int ata_cable_sata(struct ata_port
*ap
);
881 extern int ata_cable_unknown(struct ata_port
*ap
);
887 extern unsigned int ata_pio_need_iordy(const struct ata_device
*);
888 extern int ata_timing_compute(struct ata_device
*, unsigned short,
889 struct ata_timing
*, int, int);
890 extern void ata_timing_merge(const struct ata_timing
*,
891 const struct ata_timing
*, struct ata_timing
*,
895 ATA_TIMING_SETUP
= (1 << 0),
896 ATA_TIMING_ACT8B
= (1 << 1),
897 ATA_TIMING_REC8B
= (1 << 2),
898 ATA_TIMING_CYC8B
= (1 << 3),
899 ATA_TIMING_8BIT
= ATA_TIMING_ACT8B
| ATA_TIMING_REC8B
|
901 ATA_TIMING_ACTIVE
= (1 << 4),
902 ATA_TIMING_RECOVER
= (1 << 5),
903 ATA_TIMING_CYCLE
= (1 << 6),
904 ATA_TIMING_UDMA
= (1 << 7),
905 ATA_TIMING_ALL
= ATA_TIMING_SETUP
| ATA_TIMING_ACT8B
|
906 ATA_TIMING_REC8B
| ATA_TIMING_CYC8B
|
907 ATA_TIMING_ACTIVE
| ATA_TIMING_RECOVER
|
908 ATA_TIMING_CYCLE
| ATA_TIMING_UDMA
,
912 #ifdef CONFIG_ATA_ACPI
913 extern int ata_acpi_cbl_80wire(struct ata_port
*ap
);
914 int ata_acpi_stm(const struct ata_port
*ap
, struct ata_acpi_gtm
*stm
);
915 int ata_acpi_gtm(const struct ata_port
*ap
, struct ata_acpi_gtm
*stm
);
917 static inline int ata_acpi_cbl_80wire(struct ata_port
*ap
) { return 0; }
923 extern int ata_pci_init_one (struct pci_dev
*pdev
,
924 const struct ata_port_info
* const * ppi
);
925 extern void ata_pci_remove_one (struct pci_dev
*pdev
);
927 extern void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
);
928 extern int __must_check
ata_pci_device_do_resume(struct pci_dev
*pdev
);
929 extern int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
);
930 extern int ata_pci_device_resume(struct pci_dev
*pdev
);
932 extern int ata_pci_clear_simplex(struct pci_dev
*pdev
);
935 unsigned int reg
; /* PCI config register to read */
936 unsigned int width
; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
941 extern int ata_pci_init_sff_host(struct ata_host
*host
);
942 extern int ata_pci_init_bmdma(struct ata_host
*host
);
943 extern int ata_pci_prepare_sff_host(struct pci_dev
*pdev
,
944 const struct ata_port_info
* const * ppi
,
945 struct ata_host
**r_host
);
946 extern int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
);
947 extern unsigned long ata_pci_default_filter(struct ata_device
*, unsigned long);
948 #endif /* CONFIG_PCI */
953 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd
*qc
);
954 extern int sata_pmp_std_prereset(struct ata_link
*link
, unsigned long deadline
);
955 extern int sata_pmp_std_hardreset(struct ata_link
*link
, unsigned int *class,
956 unsigned long deadline
);
957 extern void sata_pmp_std_postreset(struct ata_link
*link
, unsigned int *class);
958 extern void sata_pmp_do_eh(struct ata_port
*ap
,
959 ata_prereset_fn_t prereset
, ata_reset_fn_t softreset
,
960 ata_reset_fn_t hardreset
, ata_postreset_fn_t postreset
,
961 ata_prereset_fn_t pmp_prereset
, ata_reset_fn_t pmp_softreset
,
962 ata_reset_fn_t pmp_hardreset
, ata_postreset_fn_t pmp_postreset
);
967 extern void ata_eng_timeout(struct ata_port
*ap
);
969 extern void ata_port_schedule_eh(struct ata_port
*ap
);
970 extern int ata_link_abort(struct ata_link
*link
);
971 extern int ata_port_abort(struct ata_port
*ap
);
972 extern int ata_port_freeze(struct ata_port
*ap
);
973 extern int sata_async_notification(struct ata_port
*ap
);
975 extern void ata_eh_freeze_port(struct ata_port
*ap
);
976 extern void ata_eh_thaw_port(struct ata_port
*ap
);
978 extern void ata_eh_qc_complete(struct ata_queued_cmd
*qc
);
979 extern void ata_eh_qc_retry(struct ata_queued_cmd
*qc
);
981 extern void ata_do_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
982 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
983 ata_postreset_fn_t postreset
);
988 #define ata_port_printk(ap, lv, fmt, args...) \
989 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
991 #define ata_link_printk(link, lv, fmt, args...) do { \
992 if ((link)->ap->nr_pmp_links) \
993 printk(lv"ata%u.%02u: "fmt, (link)->ap->print_id, \
994 (link)->pmp , ##args); \
996 printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args); \
999 #define ata_dev_printk(dev, lv, fmt, args...) \
1000 printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, \
1001 (dev)->link->pmp + (dev)->devno , ##args)
1004 * ata_eh_info helpers
1006 extern void __ata_ehi_push_desc(struct ata_eh_info
*ehi
, const char *fmt
, ...)
1007 __attribute__ ((format (printf
, 2, 3)));
1008 extern void ata_ehi_push_desc(struct ata_eh_info
*ehi
, const char *fmt
, ...)
1009 __attribute__ ((format (printf
, 2, 3)));
1010 extern void ata_ehi_clear_desc(struct ata_eh_info
*ehi
);
1012 static inline void ata_ehi_schedule_probe(struct ata_eh_info
*ehi
)
1014 ehi
->flags
|= ATA_EHI_RESUME_LINK
;
1015 ehi
->action
|= ATA_EH_SOFTRESET
;
1016 ehi
->probe_mask
|= (1 << ATA_MAX_DEVICES
) - 1;
1019 static inline void ata_ehi_hotplugged(struct ata_eh_info
*ehi
)
1021 ata_ehi_schedule_probe(ehi
);
1022 ehi
->flags
|= ATA_EHI_HOTPLUGGED
;
1023 ehi
->action
|= ATA_EH_ENABLE_LINK
;
1024 ehi
->err_mask
|= AC_ERR_ATA_BUS
;
1028 * port description helpers
1030 extern void ata_port_desc(struct ata_port
*ap
, const char *fmt
, ...)
1031 __attribute__ ((format (printf
, 2, 3)));
1033 extern void ata_port_pbar_desc(struct ata_port
*ap
, int bar
, ssize_t offset
,
1040 static inline struct scatterlist
*
1041 ata_qc_first_sg(struct ata_queued_cmd
*qc
)
1047 return &qc
->pad_sgent
;
1051 static inline struct scatterlist
*
1052 ata_qc_next_sg(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
1054 if (sg
== &qc
->pad_sgent
)
1056 if (++qc
->n_iter
< qc
->n_elem
)
1059 return &qc
->pad_sgent
;
1063 #define ata_for_each_sg(sg, qc) \
1064 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
1066 static inline unsigned int ata_tag_valid(unsigned int tag
)
1068 return (tag
< ATA_MAX_QUEUE
) ? 1 : 0;
1071 static inline unsigned int ata_tag_internal(unsigned int tag
)
1073 return tag
== ATA_MAX_QUEUE
- 1;
1079 static inline unsigned int ata_class_enabled(unsigned int class)
1081 return class == ATA_DEV_ATA
|| class == ATA_DEV_ATAPI
||
1082 class == ATA_DEV_PMP
|| class == ATA_DEV_SEMB
;
1085 static inline unsigned int ata_class_disabled(unsigned int class)
1087 return class == ATA_DEV_ATA_UNSUP
|| class == ATA_DEV_ATAPI_UNSUP
||
1088 class == ATA_DEV_PMP_UNSUP
|| class == ATA_DEV_SEMB_UNSUP
;
1091 static inline unsigned int ata_class_absent(unsigned int class)
1093 return !ata_class_enabled(class) && !ata_class_disabled(class);
1096 static inline unsigned int ata_dev_enabled(const struct ata_device
*dev
)
1098 return ata_class_enabled(dev
->class);
1101 static inline unsigned int ata_dev_disabled(const struct ata_device
*dev
)
1103 return ata_class_disabled(dev
->class);
1106 static inline unsigned int ata_dev_absent(const struct ata_device
*dev
)
1108 return ata_class_absent(dev
->class);
1114 static inline int ata_is_host_link(const struct ata_link
*link
)
1116 return link
== &link
->ap
->link
;
1119 static inline int ata_link_max_devices(const struct ata_link
*link
)
1121 if (ata_is_host_link(link
) && link
->ap
->flags
& ATA_FLAG_SLAVE_POSS
)
1126 static inline int ata_link_active(struct ata_link
*link
)
1128 return ata_tag_valid(link
->active_tag
) || link
->sactive
;
1131 static inline struct ata_link
*ata_port_first_link(struct ata_port
*ap
)
1133 if (ap
->nr_pmp_links
)
1134 return ap
->pmp_link
;
1138 static inline struct ata_link
*ata_port_next_link(struct ata_link
*link
)
1140 struct ata_port
*ap
= link
->ap
;
1142 if (link
== &ap
->link
) {
1143 if (!ap
->nr_pmp_links
)
1145 return ap
->pmp_link
;
1148 if (++link
- ap
->pmp_link
< ap
->nr_pmp_links
)
1153 #define __ata_port_for_each_link(lk, ap) \
1154 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1156 #define ata_port_for_each_link(link, ap) \
1157 for ((link) = ata_port_first_link(ap); (link); \
1158 (link) = ata_port_next_link(link))
1160 #define ata_link_for_each_dev(dev, link) \
1161 for ((dev) = (link)->device; \
1162 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1165 #define ata_link_for_each_dev_reverse(dev, link) \
1166 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1167 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1169 static inline u8
ata_chk_status(struct ata_port
*ap
)
1171 return ap
->ops
->check_status(ap
);
1175 * ata_ncq_enabled - Test whether NCQ is enabled
1176 * @dev: ATA device to test for
1179 * spin_lock_irqsave(host lock)
1182 * 1 if NCQ is enabled for @dev, 0 otherwise.
1184 static inline int ata_ncq_enabled(struct ata_device
*dev
)
1186 return (dev
->flags
& (ATA_DFLAG_PIO
| ATA_DFLAG_NCQ_OFF
|
1187 ATA_DFLAG_NCQ
)) == ATA_DFLAG_NCQ
;
1191 * ata_pause - Flush writes and pause 400 nanoseconds.
1192 * @ap: Port to wait for.
1195 * Inherited from caller.
1198 static inline void ata_pause(struct ata_port
*ap
)
1206 * ata_busy_wait - Wait for a port status register
1207 * @ap: Port to wait for.
1208 * @bits: bits that must be clear
1209 * @max: number of 10uS waits to perform
1211 * Waits up to max*10 microseconds for the selected bits in the port's
1212 * status register to be cleared.
1213 * Returns final value of status register.
1216 * Inherited from caller.
1219 static inline u8
ata_busy_wait(struct ata_port
*ap
, unsigned int bits
,
1226 status
= ata_chk_status(ap
);
1228 } while (status
!= 0xff && (status
& bits
) && (max
> 0));
1235 * ata_wait_idle - Wait for a port to be idle.
1236 * @ap: Port to wait for.
1238 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1239 * Returns final value of status register.
1242 * Inherited from caller.
1245 static inline u8
ata_wait_idle(struct ata_port
*ap
)
1247 u8 status
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 1000);
1250 if (status
!= 0xff && (status
& (ATA_BUSY
| ATA_DRQ
)))
1251 ata_port_printk(ap
, KERN_DEBUG
, "abnormal Status 0x%X\n",
1258 static inline void ata_qc_set_polling(struct ata_queued_cmd
*qc
)
1260 qc
->tf
.ctl
|= ATA_NIEN
;
1263 static inline struct ata_queued_cmd
*__ata_qc_from_tag(struct ata_port
*ap
,
1266 if (likely(ata_tag_valid(tag
)))
1267 return &ap
->qcmd
[tag
];
1271 static inline struct ata_queued_cmd
*ata_qc_from_tag(struct ata_port
*ap
,
1274 struct ata_queued_cmd
*qc
= __ata_qc_from_tag(ap
, tag
);
1276 if (unlikely(!qc
) || !ap
->ops
->error_handler
)
1279 if ((qc
->flags
& (ATA_QCFLAG_ACTIVE
|
1280 ATA_QCFLAG_FAILED
)) == ATA_QCFLAG_ACTIVE
)
1286 static inline void ata_tf_init(struct ata_device
*dev
, struct ata_taskfile
*tf
)
1288 memset(tf
, 0, sizeof(*tf
));
1290 tf
->ctl
= dev
->link
->ap
->ctl
;
1291 if (dev
->devno
== 0)
1292 tf
->device
= ATA_DEVICE_OBS
;
1294 tf
->device
= ATA_DEVICE_OBS
| ATA_DEV1
;
1297 static inline void ata_qc_reinit(struct ata_queued_cmd
*qc
)
1299 qc
->dma_dir
= DMA_NONE
;
1304 qc
->nbytes
= qc
->curbytes
= 0;
1309 qc
->sect_size
= ATA_SECT_SIZE
;
1311 ata_tf_init(qc
->dev
, &qc
->tf
);
1313 /* init result_tf such that it indicates normal completion */
1314 qc
->result_tf
.command
= ATA_DRDY
;
1315 qc
->result_tf
.feature
= 0;
1318 static inline int ata_try_flush_cache(const struct ata_device
*dev
)
1320 return ata_id_wcache_enabled(dev
->id
) ||
1321 ata_id_has_flush(dev
->id
) ||
1322 ata_id_has_flush_ext(dev
->id
);
1325 static inline unsigned int ac_err_mask(u8 status
)
1327 if (status
& (ATA_BUSY
| ATA_DRQ
))
1329 if (status
& (ATA_ERR
| ATA_DF
))
1334 static inline unsigned int __ac_err_mask(u8 status
)
1336 unsigned int mask
= ac_err_mask(status
);
1338 return AC_ERR_OTHER
;
1342 static inline int ata_pad_alloc(struct ata_port
*ap
, struct device
*dev
)
1345 ap
->pad
= dmam_alloc_coherent(dev
, ATA_DMA_PAD_BUF_SZ
,
1346 &ap
->pad_dma
, GFP_KERNEL
);
1347 return (ap
->pad
== NULL
) ? -ENOMEM
: 0;
1350 static inline void ata_pad_free(struct ata_port
*ap
, struct device
*dev
)
1352 dmam_free_coherent(dev
, ATA_DMA_PAD_BUF_SZ
, ap
->pad
, ap
->pad_dma
);
1355 static inline struct ata_port
*ata_shost_to_port(struct Scsi_Host
*host
)
1357 return *(struct ata_port
**)&host
->hostdata
[0];
1360 #endif /* __LINUX_LIBATA_H__ */