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_HIPM
= (1 << 8), /* device supports HIPM */
137 ATA_DFLAG_DIPM
= (1 << 9), /* device supports DIPM */
138 ATA_DFLAG_CFG_MASK
= (1 << 12) - 1,
140 ATA_DFLAG_PIO
= (1 << 12), /* device limited to PIO mode */
141 ATA_DFLAG_NCQ_OFF
= (1 << 13), /* device limited to non-NCQ mode */
142 ATA_DFLAG_SPUNDOWN
= (1 << 14), /* XXX: for spindown_compat */
143 ATA_DFLAG_SLEEPING
= (1 << 15), /* device is sleeping */
144 ATA_DFLAG_INIT_MASK
= (1 << 16) - 1,
146 ATA_DFLAG_DETACH
= (1 << 16),
147 ATA_DFLAG_DETACHED
= (1 << 17),
149 ATA_DEV_UNKNOWN
= 0, /* unknown device */
150 ATA_DEV_ATA
= 1, /* ATA device */
151 ATA_DEV_ATA_UNSUP
= 2, /* ATA device (unsupported) */
152 ATA_DEV_ATAPI
= 3, /* ATAPI device */
153 ATA_DEV_ATAPI_UNSUP
= 4, /* ATAPI device (unsupported) */
154 ATA_DEV_PMP
= 5, /* SATA port multiplier */
155 ATA_DEV_PMP_UNSUP
= 6, /* SATA port multiplier (unsupported) */
156 ATA_DEV_SEMB
= 7, /* SEMB */
157 ATA_DEV_SEMB_UNSUP
= 8, /* SEMB (unsupported) */
158 ATA_DEV_NONE
= 9, /* no device */
160 /* struct ata_link flags */
161 ATA_LFLAG_HRST_TO_RESUME
= (1 << 0), /* hardreset to resume link */
162 ATA_LFLAG_SKIP_D2H_BSY
= (1 << 1), /* can't wait for the first D2H
163 * Register FIS clearing BSY */
164 ATA_LFLAG_NO_SRST
= (1 << 2), /* avoid softreset */
165 ATA_LFLAG_ASSUME_ATA
= (1 << 3), /* assume ATA class */
166 ATA_LFLAG_ASSUME_SEMB
= (1 << 4), /* assume SEMB class */
167 ATA_LFLAG_ASSUME_CLASS
= ATA_LFLAG_ASSUME_ATA
| ATA_LFLAG_ASSUME_SEMB
,
168 ATA_LFLAG_NO_RETRY
= (1 << 5), /* don't retry this link */
169 ATA_LFLAG_DISABLED
= (1 << 6), /* link is disabled */
171 /* struct ata_port flags */
172 ATA_FLAG_SLAVE_POSS
= (1 << 0), /* host supports slave dev */
173 /* (doesn't imply presence) */
174 ATA_FLAG_SATA
= (1 << 1),
175 ATA_FLAG_NO_LEGACY
= (1 << 2), /* no legacy mode check */
176 ATA_FLAG_MMIO
= (1 << 3), /* use MMIO, not PIO */
177 ATA_FLAG_SRST
= (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
178 ATA_FLAG_SATA_RESET
= (1 << 5), /* (obsolete) use COMRESET */
179 ATA_FLAG_NO_ATAPI
= (1 << 6), /* No ATAPI support */
180 ATA_FLAG_PIO_DMA
= (1 << 7), /* PIO cmds via DMA */
181 ATA_FLAG_PIO_LBA48
= (1 << 8), /* Host DMA engine is LBA28 only */
182 ATA_FLAG_PIO_POLLING
= (1 << 9), /* use polling PIO if LLD
183 * doesn't handle PIO interrupts */
184 ATA_FLAG_NCQ
= (1 << 10), /* host supports NCQ */
185 ATA_FLAG_DEBUGMSG
= (1 << 13),
186 ATA_FLAG_IGN_SIMPLEX
= (1 << 15), /* ignore SIMPLEX */
187 ATA_FLAG_NO_IORDY
= (1 << 16), /* controller lacks iordy */
188 ATA_FLAG_ACPI_SATA
= (1 << 17), /* need native SATA ACPI layout */
189 ATA_FLAG_AN
= (1 << 18), /* controller supports AN */
190 ATA_FLAG_PMP
= (1 << 19), /* controller supports PMP */
191 ATA_FLAG_IPM
= (1 << 20), /* driver can handle IPM */
193 /* The following flag belongs to ap->pflags but is kept in
194 * ap->flags because it's referenced in many LLDs and will be
195 * removed in not-too-distant future.
197 ATA_FLAG_DISABLED
= (1 << 23), /* port is disabled, ignore it */
199 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
201 /* struct ata_port pflags */
202 ATA_PFLAG_EH_PENDING
= (1 << 0), /* EH pending */
203 ATA_PFLAG_EH_IN_PROGRESS
= (1 << 1), /* EH in progress */
204 ATA_PFLAG_FROZEN
= (1 << 2), /* port is frozen */
205 ATA_PFLAG_RECOVERED
= (1 << 3), /* recovery action performed */
206 ATA_PFLAG_LOADING
= (1 << 4), /* boot/loading probe */
207 ATA_PFLAG_UNLOADING
= (1 << 5), /* module is unloading */
208 ATA_PFLAG_SCSI_HOTPLUG
= (1 << 6), /* SCSI hotplug scheduled */
209 ATA_PFLAG_INITIALIZING
= (1 << 7), /* being initialized, don't touch */
210 ATA_PFLAG_RESETTING
= (1 << 8), /* reset in progress */
212 ATA_PFLAG_SUSPENDED
= (1 << 17), /* port is suspended (power) */
213 ATA_PFLAG_PM_PENDING
= (1 << 18), /* PM operation pending */
214 ATA_PFLAG_GTM_VALID
= (1 << 19), /* acpi_gtm data valid */
216 /* struct ata_queued_cmd flags */
217 ATA_QCFLAG_ACTIVE
= (1 << 0), /* cmd not yet ack'd to scsi lyer */
218 ATA_QCFLAG_SG
= (1 << 1), /* have s/g table? */
219 ATA_QCFLAG_SINGLE
= (1 << 2), /* no s/g, just a single buffer */
220 ATA_QCFLAG_DMAMAP
= ATA_QCFLAG_SG
| ATA_QCFLAG_SINGLE
,
221 ATA_QCFLAG_IO
= (1 << 3), /* standard IO command */
222 ATA_QCFLAG_RESULT_TF
= (1 << 4), /* result TF requested */
223 ATA_QCFLAG_CLEAR_EXCL
= (1 << 5), /* clear excl_link on completion */
224 ATA_QCFLAG_QUIET
= (1 << 6), /* don't report device error */
226 ATA_QCFLAG_FAILED
= (1 << 16), /* cmd failed and is owned by EH */
227 ATA_QCFLAG_SENSE_VALID
= (1 << 17), /* sense data valid */
228 ATA_QCFLAG_EH_SCHEDULED
= (1 << 18), /* EH scheduled (obsolete) */
231 ATA_HOST_SIMPLEX
= (1 << 0), /* Host is simplex, one DMA channel per host only */
232 ATA_HOST_STARTED
= (1 << 1), /* Host started */
234 /* bits 24:31 of host->flags are reserved for LLD specific flags */
236 /* various lengths of time */
237 ATA_TMOUT_BOOT
= 30 * HZ
, /* heuristic */
238 ATA_TMOUT_BOOT_QUICK
= 7 * HZ
, /* heuristic */
239 ATA_TMOUT_INTERNAL
= 30 * HZ
,
240 ATA_TMOUT_INTERNAL_QUICK
= 5 * HZ
,
242 /* FIXME: GoVault needs 2s but we can't afford that without
243 * parallel probing. 800ms is enough for iVDR disk
244 * HHD424020F7SV00. Increase to 2secs when parallel probing
247 ATA_TMOUT_FF_WAIT
= 4 * HZ
/ 5,
261 /* SATA port states */
266 /* encoding various smaller bitmaps into a single
267 * unsigned int bitmap
274 ATA_SHIFT_MWDMA
= ATA_SHIFT_PIO
+ ATA_BITS_PIO
,
275 ATA_SHIFT_UDMA
= ATA_SHIFT_MWDMA
+ ATA_BITS_MWDMA
,
277 ATA_MASK_PIO
= ((1 << ATA_BITS_PIO
) - 1) << ATA_SHIFT_PIO
,
278 ATA_MASK_MWDMA
= ((1 << ATA_BITS_MWDMA
) - 1) << ATA_SHIFT_MWDMA
,
279 ATA_MASK_UDMA
= ((1 << ATA_BITS_UDMA
) - 1) << ATA_SHIFT_UDMA
,
281 /* size of buffer to pad xfers ending on unaligned boundaries */
283 ATA_DMA_PAD_BUF_SZ
= ATA_DMA_PAD_SZ
* ATA_MAX_QUEUE
,
288 /* return values for ->qc_defer */
292 /* desc_len for ata_eh_info and context */
293 ATA_EH_DESC_LEN
= 80,
295 /* reset / recovery action types */
296 ATA_EH_REVALIDATE
= (1 << 0),
297 ATA_EH_SOFTRESET
= (1 << 1),
298 ATA_EH_HARDRESET
= (1 << 2),
299 ATA_EH_ENABLE_LINK
= (1 << 3),
301 ATA_EH_RESET_MASK
= ATA_EH_SOFTRESET
| ATA_EH_HARDRESET
,
302 ATA_EH_PERDEV_MASK
= ATA_EH_REVALIDATE
,
304 /* ata_eh_info->flags */
305 ATA_EHI_HOTPLUGGED
= (1 << 0), /* could have been hotplugged */
306 ATA_EHI_RESUME_LINK
= (1 << 1), /* resume link (reset modifier) */
307 ATA_EHI_NO_AUTOPSY
= (1 << 2), /* no autopsy */
308 ATA_EHI_QUIET
= (1 << 3), /* be quiet */
309 ATA_EHI_LPM
= (1 << 4), /* link power management action */
311 ATA_EHI_DID_SOFTRESET
= (1 << 16), /* already soft-reset this port */
312 ATA_EHI_DID_HARDRESET
= (1 << 17), /* already soft-reset this port */
313 ATA_EHI_PRINTINFO
= (1 << 18), /* print configuration info */
314 ATA_EHI_SETMODE
= (1 << 19), /* configure transfer mode */
315 ATA_EHI_POST_SETMODE
= (1 << 20), /* revaildating after setmode */
317 ATA_EHI_DID_RESET
= ATA_EHI_DID_SOFTRESET
| ATA_EHI_DID_HARDRESET
,
318 ATA_EHI_RESET_MODIFIER_MASK
= ATA_EHI_RESUME_LINK
,
320 /* max tries if error condition is still set after ->error_handler */
321 ATA_EH_MAX_TRIES
= 5,
323 /* how hard are we gonna try to probe/recover devices */
324 ATA_PROBE_MAX_TRIES
= 3,
325 ATA_EH_DEV_TRIES
= 3,
326 ATA_EH_PMP_TRIES
= 5,
327 ATA_EH_PMP_LINK_TRIES
= 3,
329 SATA_PMP_SCR_TIMEOUT
= 250,
331 /* Horkage types. May be set by libata or controller on drives
332 (some horkage may be drive/controller pair dependant */
334 ATA_HORKAGE_DIAGNOSTIC
= (1 << 0), /* Failed boot diag */
335 ATA_HORKAGE_NODMA
= (1 << 1), /* DMA problems */
336 ATA_HORKAGE_NONCQ
= (1 << 2), /* Don't use NCQ */
337 ATA_HORKAGE_MAX_SEC_128
= (1 << 3), /* Limit max sects to 128 */
338 ATA_HORKAGE_BROKEN_HPA
= (1 << 4), /* Broken HPA */
339 ATA_HORKAGE_SKIP_PM
= (1 << 5), /* Skip PM operations */
340 ATA_HORKAGE_HPA_SIZE
= (1 << 6), /* native size off by one */
341 ATA_HORKAGE_IPM
= (1 << 7), /* Link PM problems */
342 ATA_HORKAGE_IVB
= (1 << 8), /* cbl det validity bit bugs */
344 /* DMA mask for user DMA control: User visible values; DO NOT
346 ATA_DMA_MASK_ATA
= (1 << 0), /* DMA on ATA Disk */
347 ATA_DMA_MASK_ATAPI
= (1 << 1), /* DMA on ATAPI */
348 ATA_DMA_MASK_CFA
= (1 << 2), /* DMA on CF Card */
351 enum hsm_task_states
{
352 HSM_ST_IDLE
, /* no command on going */
353 HSM_ST_FIRST
, /* (waiting the device to)
354 write CDB or first data block */
355 HSM_ST
, /* (waiting the device to) transfer data */
356 HSM_ST_LAST
, /* (waiting the device to) complete command */
357 HSM_ST_ERR
, /* error */
360 enum ata_completion_errors
{
361 AC_ERR_DEV
= (1 << 0), /* device reported error */
362 AC_ERR_HSM
= (1 << 1), /* host state machine violation */
363 AC_ERR_TIMEOUT
= (1 << 2), /* timeout */
364 AC_ERR_MEDIA
= (1 << 3), /* media error */
365 AC_ERR_ATA_BUS
= (1 << 4), /* ATA bus error */
366 AC_ERR_HOST_BUS
= (1 << 5), /* host bus error */
367 AC_ERR_SYSTEM
= (1 << 6), /* system error */
368 AC_ERR_INVALID
= (1 << 7), /* invalid argument */
369 AC_ERR_OTHER
= (1 << 8), /* unknown */
370 AC_ERR_NODEV_HINT
= (1 << 9), /* polling device detection hint */
371 AC_ERR_NCQ
= (1 << 10), /* marker for offending NCQ qc */
374 /* forward declarations */
376 struct ata_port_operations
;
379 struct ata_queued_cmd
;
382 typedef void (*ata_qc_cb_t
) (struct ata_queued_cmd
*qc
);
383 typedef int (*ata_prereset_fn_t
)(struct ata_link
*link
, unsigned long deadline
);
384 typedef int (*ata_reset_fn_t
)(struct ata_link
*link
, unsigned int *classes
,
385 unsigned long deadline
);
386 typedef void (*ata_postreset_fn_t
)(struct ata_link
*link
, unsigned int *classes
);
389 * host pm policy: If you alter this, you also need to alter libata-scsi.c
390 * (for the ascii descriptions)
398 extern struct class_device_attribute class_device_attr_link_power_management_policy
;
401 void __iomem
*cmd_addr
;
402 void __iomem
*data_addr
;
403 void __iomem
*error_addr
;
404 void __iomem
*feature_addr
;
405 void __iomem
*nsect_addr
;
406 void __iomem
*lbal_addr
;
407 void __iomem
*lbam_addr
;
408 void __iomem
*lbah_addr
;
409 void __iomem
*device_addr
;
410 void __iomem
*status_addr
;
411 void __iomem
*command_addr
;
412 void __iomem
*altstatus_addr
;
413 void __iomem
*ctl_addr
;
414 void __iomem
*bmdma_addr
;
415 void __iomem
*scr_addr
;
421 void __iomem
* const *iomap
;
422 unsigned int n_ports
;
424 const struct ata_port_operations
*ops
;
426 #ifdef CONFIG_ATA_ACPI
427 acpi_handle acpi_handle
;
429 struct ata_port
*simplex_claimed
; /* channel owning the DMA */
430 struct ata_port
*ports
[0];
433 struct ata_queued_cmd
{
435 struct ata_device
*dev
;
437 struct scsi_cmnd
*scsicmd
;
438 void (*scsidone
)(struct scsi_cmnd
*);
440 struct ata_taskfile tf
;
441 u8 cdb
[ATAPI_CDB_LEN
];
443 unsigned long flags
; /* ATA_QCFLAG_xxx */
447 unsigned int orig_n_elem
;
451 unsigned int pad_len
;
452 unsigned int sect_size
;
455 unsigned int curbytes
;
457 struct scatterlist
*cursg
;
458 unsigned int cursg_ofs
;
460 struct scatterlist sgent
;
461 struct scatterlist pad_sgent
;
464 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
465 struct scatterlist
*__sg
;
467 unsigned int err_mask
;
468 struct ata_taskfile result_tf
;
469 ata_qc_cb_t complete_fn
;
475 struct ata_port_stats
{
476 unsigned long unhandled_irq
;
477 unsigned long idle_irq
;
478 unsigned long rw_reqbuf
;
481 struct ata_ering_entry
{
483 unsigned int err_mask
;
489 struct ata_ering_entry ring
[ATA_ERING_SIZE
];
493 struct ata_link
*link
;
494 unsigned int devno
; /* 0 or 1 */
495 unsigned long flags
; /* ATA_DFLAG_xxx */
496 unsigned int horkage
; /* List of broken features */
497 struct scsi_device
*sdev
; /* attached SCSI device */
498 #ifdef CONFIG_ATA_ACPI
499 acpi_handle acpi_handle
;
501 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
502 u64 n_sectors
; /* size of device, if ATA */
503 unsigned int class; /* ATA_DEV_xxx */
506 u16 id
[ATA_ID_WORDS
]; /* IDENTIFY xxx DEVICE data */
507 u32 gscr
[SATA_PMP_GSCR_DWORDS
]; /* PMP GSCR block */
513 unsigned int xfer_shift
; /* ATA_SHIFT_xxx */
515 unsigned int multi_count
; /* sectors count for
516 READ/WRITE MULTIPLE */
517 unsigned int max_sectors
; /* per-device max sectors */
518 unsigned int cdb_len
;
520 /* per-dev xfer mask */
521 unsigned int pio_mask
;
522 unsigned int mwdma_mask
;
523 unsigned int udma_mask
;
525 /* for CHS addressing */
526 u16 cylinders
; /* Number of cylinders */
527 u16 heads
; /* Number of heads */
528 u16 sectors
; /* Number of sectors per track */
531 struct ata_ering ering
;
535 /* Offset into struct ata_device. Fields above it are maintained
536 * acress device init. Fields below are zeroed.
538 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
541 struct ata_device
*dev
; /* offending device */
542 u32 serror
; /* SError from LLDD */
543 unsigned int err_mask
; /* port-wide err_mask */
544 unsigned int action
; /* ATA_EH_* action mask */
545 unsigned int dev_action
[ATA_MAX_DEVICES
]; /* dev EH action */
546 unsigned int flags
; /* ATA_EHI_* flags */
548 unsigned int probe_mask
;
550 char desc
[ATA_EH_DESC_LEN
];
554 struct ata_eh_context
{
555 struct ata_eh_info i
;
556 int tries
[ATA_MAX_DEVICES
];
557 unsigned int classes
[ATA_MAX_DEVICES
];
558 unsigned int did_probe_mask
;
561 struct ata_acpi_drive
567 struct ata_acpi_gtm
{
568 struct ata_acpi_drive drive
[2];
574 int pmp
; /* port multiplier port # */
576 unsigned int active_tag
; /* active tag on this link */
577 u32 sactive
; /* active NCQ commands */
579 unsigned int flags
; /* ATA_LFLAG_xxx */
581 unsigned int hw_sata_spd_limit
;
582 unsigned int sata_spd_limit
;
583 unsigned int sata_spd
; /* current SATA PHY speed */
585 /* record runtime error info, protected by host_set lock */
586 struct ata_eh_info eh_info
;
588 struct ata_eh_context eh_context
;
590 struct ata_device device
[ATA_MAX_DEVICES
];
594 struct Scsi_Host
*scsi_host
; /* our co-allocated scsi host */
595 const struct ata_port_operations
*ops
;
597 unsigned long flags
; /* ATA_FLAG_xxx */
598 unsigned int pflags
; /* ATA_PFLAG_xxx */
599 unsigned int print_id
; /* user visible unique port ID */
600 unsigned int port_no
; /* 0 based port no. inside the host */
602 struct ata_prd
*prd
; /* our SG list */
603 dma_addr_t prd_dma
; /* and its DMA mapping */
605 void *pad
; /* array of DMA pad buffers */
608 struct ata_ioports ioaddr
; /* ATA cmd/ctl/dma register blocks */
610 u8 ctl
; /* cache of ATA control register */
611 u8 last_ctl
; /* Cache last written value */
612 unsigned int pio_mask
;
613 unsigned int mwdma_mask
;
614 unsigned int udma_mask
;
615 unsigned int cbl
; /* cable type; ATA_CBL_xxx */
617 struct ata_queued_cmd qcmd
[ATA_MAX_QUEUE
];
618 unsigned long qc_allocated
;
619 unsigned int qc_active
;
620 int nr_active_links
; /* #links with active qcs */
622 struct ata_link link
; /* host default link */
624 int nr_pmp_links
; /* nr of available PMP links */
625 struct ata_link
*pmp_link
; /* array of PMP links */
626 struct ata_link
*excl_link
; /* for PMP qc exclusion */
628 struct ata_port_stats stats
;
629 struct ata_host
*host
;
632 void *port_task_data
;
633 struct delayed_work port_task
;
634 struct delayed_work hotplug_task
;
635 struct work_struct scsi_rescan_task
;
637 unsigned int hsm_task_state
;
640 struct list_head eh_done_q
;
641 wait_queue_head_t eh_wait_q
;
644 pm_message_t pm_mesg
;
646 enum link_pm pm_policy
;
648 struct timer_list fastdrain_timer
;
649 unsigned long fastdrain_cnt
;
653 #ifdef CONFIG_ATA_ACPI
654 acpi_handle acpi_handle
;
655 struct ata_acpi_gtm acpi_gtm
;
657 u8 sector_buf
[ATA_SECT_SIZE
]; /* owned by EH */
660 struct ata_port_operations
{
661 void (*dev_config
) (struct ata_device
*);
663 void (*set_piomode
) (struct ata_port
*, struct ata_device
*);
664 void (*set_dmamode
) (struct ata_port
*, struct ata_device
*);
665 unsigned long (*mode_filter
) (struct ata_device
*, unsigned long);
667 void (*tf_load
) (struct ata_port
*ap
, const struct ata_taskfile
*tf
);
668 void (*tf_read
) (struct ata_port
*ap
, struct ata_taskfile
*tf
);
670 void (*exec_command
)(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
671 u8 (*check_status
)(struct ata_port
*ap
);
672 u8 (*check_altstatus
)(struct ata_port
*ap
);
673 void (*dev_select
)(struct ata_port
*ap
, unsigned int device
);
675 void (*phy_reset
) (struct ata_port
*ap
); /* obsolete */
676 int (*set_mode
) (struct ata_link
*link
, struct ata_device
**r_failed_dev
);
678 int (*cable_detect
) (struct ata_port
*ap
);
680 int (*check_atapi_dma
) (struct ata_queued_cmd
*qc
);
682 void (*bmdma_setup
) (struct ata_queued_cmd
*qc
);
683 void (*bmdma_start
) (struct ata_queued_cmd
*qc
);
685 void (*data_xfer
) (struct ata_device
*, unsigned char *, unsigned int, int);
687 int (*qc_defer
) (struct ata_queued_cmd
*qc
);
688 void (*qc_prep
) (struct ata_queued_cmd
*qc
);
689 unsigned int (*qc_issue
) (struct ata_queued_cmd
*qc
);
691 /* port multiplier */
692 void (*pmp_attach
) (struct ata_port
*ap
);
693 void (*pmp_detach
) (struct ata_port
*ap
);
695 /* Error handlers. ->error_handler overrides ->eng_timeout and
696 * indicates that new-style EH is in place.
698 void (*eng_timeout
) (struct ata_port
*ap
); /* obsolete */
700 void (*freeze
) (struct ata_port
*ap
);
701 void (*thaw
) (struct ata_port
*ap
);
702 void (*error_handler
) (struct ata_port
*ap
);
703 void (*post_internal_cmd
) (struct ata_queued_cmd
*qc
);
705 irq_handler_t irq_handler
;
706 void (*irq_clear
) (struct ata_port
*);
707 u8 (*irq_on
) (struct ata_port
*);
709 int (*scr_read
) (struct ata_port
*ap
, unsigned int sc_reg
, u32
*val
);
710 int (*scr_write
) (struct ata_port
*ap
, unsigned int sc_reg
, u32 val
);
712 int (*port_suspend
) (struct ata_port
*ap
, pm_message_t mesg
);
713 int (*port_resume
) (struct ata_port
*ap
);
714 int (*enable_pm
) (struct ata_port
*ap
, enum link_pm policy
);
715 void (*disable_pm
) (struct ata_port
*ap
);
716 int (*port_start
) (struct ata_port
*ap
);
717 void (*port_stop
) (struct ata_port
*ap
);
719 void (*host_stop
) (struct ata_host
*host
);
721 void (*bmdma_stop
) (struct ata_queued_cmd
*qc
);
722 u8 (*bmdma_status
) (struct ata_port
*ap
);
725 struct ata_port_info
{
726 struct scsi_host_template
*sht
;
728 unsigned long link_flags
;
729 unsigned long pio_mask
;
730 unsigned long mwdma_mask
;
731 unsigned long udma_mask
;
732 const struct ata_port_operations
*port_ops
;
733 irq_handler_t irq_handler
;
738 unsigned short mode
; /* ATA mode */
739 unsigned short setup
; /* t1 */
740 unsigned short act8b
; /* t2 for 8-bit I/O */
741 unsigned short rec8b
; /* t2i for 8-bit I/O */
742 unsigned short cyc8b
; /* t0 for 8-bit I/O */
743 unsigned short active
; /* t2 or tD */
744 unsigned short recover
; /* t2i or tK */
745 unsigned short cycle
; /* t0 */
746 unsigned short udma
; /* t2CYCTYP/2 */
749 #define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
751 extern const unsigned long sata_deb_timing_normal
[];
752 extern const unsigned long sata_deb_timing_hotplug
[];
753 extern const unsigned long sata_deb_timing_long
[];
755 extern const struct ata_port_operations ata_dummy_port_ops
;
756 extern const struct ata_port_info ata_dummy_port_info
;
758 static inline const unsigned long *
759 sata_ehc_deb_timing(struct ata_eh_context
*ehc
)
761 if (ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
)
762 return sata_deb_timing_hotplug
;
764 return sata_deb_timing_normal
;
767 static inline int ata_port_is_dummy(struct ata_port
*ap
)
769 return ap
->ops
== &ata_dummy_port_ops
;
772 extern void sata_print_link_status(struct ata_link
*link
);
773 extern void ata_port_probe(struct ata_port
*);
774 extern void __sata_phy_reset(struct ata_port
*ap
);
775 extern void sata_phy_reset(struct ata_port
*ap
);
776 extern void ata_bus_reset(struct ata_port
*ap
);
777 extern int sata_set_spd(struct ata_link
*link
);
778 extern int sata_link_debounce(struct ata_link
*link
,
779 const unsigned long *params
, unsigned long deadline
);
780 extern int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
781 unsigned long deadline
);
782 extern int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
);
783 extern int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
784 unsigned long deadline
);
785 extern int sata_link_hardreset(struct ata_link
*link
,
786 const unsigned long *timing
, unsigned long deadline
);
787 extern int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
788 unsigned long deadline
);
789 extern void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
);
790 extern void ata_port_disable(struct ata_port
*);
791 extern void ata_std_ports(struct ata_ioports
*ioaddr
);
793 extern struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
);
794 extern struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
795 const struct ata_port_info
* const * ppi
, int n_ports
);
796 extern int ata_host_start(struct ata_host
*host
);
797 extern int ata_host_register(struct ata_host
*host
,
798 struct scsi_host_template
*sht
);
799 extern int ata_host_activate(struct ata_host
*host
, int irq
,
800 irq_handler_t irq_handler
, unsigned long irq_flags
,
801 struct scsi_host_template
*sht
);
802 extern void ata_host_detach(struct ata_host
*host
);
803 extern void ata_host_init(struct ata_host
*, struct device
*,
804 unsigned long, const struct ata_port_operations
*);
805 extern int ata_scsi_detect(struct scsi_host_template
*sht
);
806 extern int ata_scsi_ioctl(struct scsi_device
*dev
, int cmd
, void __user
*arg
);
807 extern int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*));
808 extern void ata_sas_port_destroy(struct ata_port
*);
809 extern struct ata_port
*ata_sas_port_alloc(struct ata_host
*,
810 struct ata_port_info
*, struct Scsi_Host
*);
811 extern int ata_sas_port_init(struct ata_port
*);
812 extern int ata_sas_port_start(struct ata_port
*ap
);
813 extern void ata_sas_port_stop(struct ata_port
*ap
);
814 extern int ata_sas_slave_configure(struct scsi_device
*, struct ata_port
*);
815 extern int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
816 struct ata_port
*ap
);
817 extern unsigned int ata_host_intr(struct ata_port
*ap
, struct ata_queued_cmd
*qc
);
818 extern int sata_scr_valid(struct ata_link
*link
);
819 extern int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
);
820 extern int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
);
821 extern int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
);
822 extern int ata_link_online(struct ata_link
*link
);
823 extern int ata_link_offline(struct ata_link
*link
);
825 extern int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
);
826 extern void ata_host_resume(struct ata_host
*host
);
828 extern int ata_ratelimit(void);
829 extern int ata_busy_sleep(struct ata_port
*ap
,
830 unsigned long timeout_pat
, unsigned long timeout
);
831 extern void ata_wait_after_reset(struct ata_port
*ap
, unsigned long deadline
);
832 extern int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
);
833 extern void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
,
834 void *data
, unsigned long delay
);
835 extern u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
836 unsigned long interval_msec
,
837 unsigned long timeout_msec
);
838 extern unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
842 * Default driver ops implementations
844 extern void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
845 extern void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
);
846 extern void ata_tf_to_fis(const struct ata_taskfile
*tf
,
847 u8 pmp
, int is_cmd
, u8
*fis
);
848 extern void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
);
849 extern void ata_noop_dev_select(struct ata_port
*ap
, unsigned int device
);
850 extern void ata_std_dev_select(struct ata_port
*ap
, unsigned int device
);
851 extern u8
ata_check_status(struct ata_port
*ap
);
852 extern u8
ata_altstatus(struct ata_port
*ap
);
853 extern void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
854 extern int ata_port_start(struct ata_port
*ap
);
855 extern int ata_sff_port_start(struct ata_port
*ap
);
856 extern irqreturn_t
ata_interrupt(int irq
, void *dev_instance
);
857 extern void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
858 unsigned int buflen
, int write_data
);
859 extern void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
860 unsigned int buflen
, int write_data
);
861 extern int ata_std_qc_defer(struct ata_queued_cmd
*qc
);
862 extern void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
);
863 extern void ata_qc_prep(struct ata_queued_cmd
*qc
);
864 extern void ata_noop_qc_prep(struct ata_queued_cmd
*qc
);
865 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
);
866 extern void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
,
867 unsigned int buflen
);
868 extern void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
869 unsigned int n_elem
);
870 extern unsigned int ata_dev_classify(const struct ata_taskfile
*tf
);
871 extern void ata_dev_disable(struct ata_device
*adev
);
872 extern void ata_id_string(const u16
*id
, unsigned char *s
,
873 unsigned int ofs
, unsigned int len
);
874 extern void ata_id_c_string(const u16
*id
, unsigned char *s
,
875 unsigned int ofs
, unsigned int len
);
876 extern void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
);
877 extern void ata_bmdma_setup(struct ata_queued_cmd
*qc
);
878 extern void ata_bmdma_start(struct ata_queued_cmd
*qc
);
879 extern void ata_bmdma_stop(struct ata_queued_cmd
*qc
);
880 extern u8
ata_bmdma_status(struct ata_port
*ap
);
881 extern void ata_bmdma_irq_clear(struct ata_port
*ap
);
882 extern void ata_bmdma_freeze(struct ata_port
*ap
);
883 extern void ata_bmdma_thaw(struct ata_port
*ap
);
884 extern void ata_bmdma_drive_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
885 ata_reset_fn_t softreset
,
886 ata_reset_fn_t hardreset
,
887 ata_postreset_fn_t postreset
);
888 extern void ata_bmdma_error_handler(struct ata_port
*ap
);
889 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd
*qc
);
890 extern int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
891 u8 status
, int in_wq
);
892 extern void ata_qc_complete(struct ata_queued_cmd
*qc
);
893 extern int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
894 void (*finish_qc
)(struct ata_queued_cmd
*));
895 extern void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
896 void (*done
)(struct scsi_cmnd
*));
897 extern int ata_std_bios_param(struct scsi_device
*sdev
,
898 struct block_device
*bdev
,
899 sector_t capacity
, int geom
[]);
900 extern int ata_scsi_slave_config(struct scsi_device
*sdev
);
901 extern void ata_scsi_slave_destroy(struct scsi_device
*sdev
);
902 extern int ata_scsi_change_queue_depth(struct scsi_device
*sdev
,
904 extern struct ata_device
*ata_dev_pair(struct ata_device
*adev
);
905 extern int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
);
906 extern u8
ata_irq_on(struct ata_port
*ap
);
908 extern int ata_cable_40wire(struct ata_port
*ap
);
909 extern int ata_cable_80wire(struct ata_port
*ap
);
910 extern int ata_cable_sata(struct ata_port
*ap
);
911 extern int ata_cable_unknown(struct ata_port
*ap
);
917 extern unsigned int ata_pio_need_iordy(const struct ata_device
*);
918 extern int ata_timing_compute(struct ata_device
*, unsigned short,
919 struct ata_timing
*, int, int);
920 extern void ata_timing_merge(const struct ata_timing
*,
921 const struct ata_timing
*, struct ata_timing
*,
925 ATA_TIMING_SETUP
= (1 << 0),
926 ATA_TIMING_ACT8B
= (1 << 1),
927 ATA_TIMING_REC8B
= (1 << 2),
928 ATA_TIMING_CYC8B
= (1 << 3),
929 ATA_TIMING_8BIT
= ATA_TIMING_ACT8B
| ATA_TIMING_REC8B
|
931 ATA_TIMING_ACTIVE
= (1 << 4),
932 ATA_TIMING_RECOVER
= (1 << 5),
933 ATA_TIMING_CYCLE
= (1 << 6),
934 ATA_TIMING_UDMA
= (1 << 7),
935 ATA_TIMING_ALL
= ATA_TIMING_SETUP
| ATA_TIMING_ACT8B
|
936 ATA_TIMING_REC8B
| ATA_TIMING_CYC8B
|
937 ATA_TIMING_ACTIVE
| ATA_TIMING_RECOVER
|
938 ATA_TIMING_CYCLE
| ATA_TIMING_UDMA
,
942 #ifdef CONFIG_ATA_ACPI
943 extern int ata_acpi_cbl_80wire(struct ata_port
*ap
);
944 int ata_acpi_stm(const struct ata_port
*ap
, struct ata_acpi_gtm
*stm
);
945 int ata_acpi_gtm(const struct ata_port
*ap
, struct ata_acpi_gtm
*stm
);
947 static inline int ata_acpi_cbl_80wire(struct ata_port
*ap
) { return 0; }
953 extern int ata_pci_init_one(struct pci_dev
*pdev
,
954 const struct ata_port_info
* const * ppi
);
955 extern void ata_pci_remove_one(struct pci_dev
*pdev
);
957 extern void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
);
958 extern int __must_check
ata_pci_device_do_resume(struct pci_dev
*pdev
);
959 extern int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
);
960 extern int ata_pci_device_resume(struct pci_dev
*pdev
);
962 extern int ata_pci_clear_simplex(struct pci_dev
*pdev
);
965 unsigned int reg
; /* PCI config register to read */
966 unsigned int width
; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
971 extern int ata_pci_init_sff_host(struct ata_host
*host
);
972 extern int ata_pci_init_bmdma(struct ata_host
*host
);
973 extern int ata_pci_prepare_sff_host(struct pci_dev
*pdev
,
974 const struct ata_port_info
* const * ppi
,
975 struct ata_host
**r_host
);
976 extern int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
);
977 extern unsigned long ata_pci_default_filter(struct ata_device
*, unsigned long);
978 #endif /* CONFIG_PCI */
983 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd
*qc
);
984 extern int sata_pmp_std_prereset(struct ata_link
*link
, unsigned long deadline
);
985 extern int sata_pmp_std_hardreset(struct ata_link
*link
, unsigned int *class,
986 unsigned long deadline
);
987 extern void sata_pmp_std_postreset(struct ata_link
*link
, unsigned int *class);
988 extern void sata_pmp_do_eh(struct ata_port
*ap
,
989 ata_prereset_fn_t prereset
, ata_reset_fn_t softreset
,
990 ata_reset_fn_t hardreset
, ata_postreset_fn_t postreset
,
991 ata_prereset_fn_t pmp_prereset
, ata_reset_fn_t pmp_softreset
,
992 ata_reset_fn_t pmp_hardreset
, ata_postreset_fn_t pmp_postreset
);
997 extern void ata_eng_timeout(struct ata_port
*ap
);
999 extern void ata_port_schedule_eh(struct ata_port
*ap
);
1000 extern int ata_link_abort(struct ata_link
*link
);
1001 extern int ata_port_abort(struct ata_port
*ap
);
1002 extern int ata_port_freeze(struct ata_port
*ap
);
1003 extern int sata_async_notification(struct ata_port
*ap
);
1005 extern void ata_eh_freeze_port(struct ata_port
*ap
);
1006 extern void ata_eh_thaw_port(struct ata_port
*ap
);
1008 extern void ata_eh_qc_complete(struct ata_queued_cmd
*qc
);
1009 extern void ata_eh_qc_retry(struct ata_queued_cmd
*qc
);
1011 extern void ata_do_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
1012 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
1013 ata_postreset_fn_t postreset
);
1018 #define ata_port_printk(ap, lv, fmt, args...) \
1019 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
1021 #define ata_link_printk(link, lv, fmt, args...) do { \
1022 if ((link)->ap->nr_pmp_links) \
1023 printk(lv"ata%u.%02u: "fmt, (link)->ap->print_id, \
1024 (link)->pmp , ##args); \
1026 printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args); \
1029 #define ata_dev_printk(dev, lv, fmt, args...) \
1030 printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, \
1031 (dev)->link->pmp + (dev)->devno , ##args)
1034 * ata_eh_info helpers
1036 extern void __ata_ehi_push_desc(struct ata_eh_info
*ehi
, const char *fmt
, ...)
1037 __attribute__ ((format (printf
, 2, 3)));
1038 extern void ata_ehi_push_desc(struct ata_eh_info
*ehi
, const char *fmt
, ...)
1039 __attribute__ ((format (printf
, 2, 3)));
1040 extern void ata_ehi_clear_desc(struct ata_eh_info
*ehi
);
1042 static inline void ata_ehi_schedule_probe(struct ata_eh_info
*ehi
)
1044 ehi
->flags
|= ATA_EHI_RESUME_LINK
;
1045 ehi
->action
|= ATA_EH_SOFTRESET
;
1046 ehi
->probe_mask
|= (1 << ATA_MAX_DEVICES
) - 1;
1049 static inline void ata_ehi_hotplugged(struct ata_eh_info
*ehi
)
1051 ata_ehi_schedule_probe(ehi
);
1052 ehi
->flags
|= ATA_EHI_HOTPLUGGED
;
1053 ehi
->action
|= ATA_EH_ENABLE_LINK
;
1054 ehi
->err_mask
|= AC_ERR_ATA_BUS
;
1058 * port description helpers
1060 extern void ata_port_desc(struct ata_port
*ap
, const char *fmt
, ...)
1061 __attribute__ ((format (printf
, 2, 3)));
1063 extern void ata_port_pbar_desc(struct ata_port
*ap
, int bar
, ssize_t offset
,
1070 static inline struct scatterlist
*
1071 ata_qc_first_sg(struct ata_queued_cmd
*qc
)
1077 return &qc
->pad_sgent
;
1081 static inline struct scatterlist
*
1082 ata_qc_next_sg(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
1084 if (sg
== &qc
->pad_sgent
)
1086 if (++qc
->n_iter
< qc
->n_elem
)
1089 return &qc
->pad_sgent
;
1093 #define ata_for_each_sg(sg, qc) \
1094 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
1096 static inline unsigned int ata_tag_valid(unsigned int tag
)
1098 return (tag
< ATA_MAX_QUEUE
) ? 1 : 0;
1101 static inline unsigned int ata_tag_internal(unsigned int tag
)
1103 return tag
== ATA_MAX_QUEUE
- 1;
1109 static inline unsigned int ata_class_enabled(unsigned int class)
1111 return class == ATA_DEV_ATA
|| class == ATA_DEV_ATAPI
||
1112 class == ATA_DEV_PMP
|| class == ATA_DEV_SEMB
;
1115 static inline unsigned int ata_class_disabled(unsigned int class)
1117 return class == ATA_DEV_ATA_UNSUP
|| class == ATA_DEV_ATAPI_UNSUP
||
1118 class == ATA_DEV_PMP_UNSUP
|| class == ATA_DEV_SEMB_UNSUP
;
1121 static inline unsigned int ata_class_absent(unsigned int class)
1123 return !ata_class_enabled(class) && !ata_class_disabled(class);
1126 static inline unsigned int ata_dev_enabled(const struct ata_device
*dev
)
1128 return ata_class_enabled(dev
->class);
1131 static inline unsigned int ata_dev_disabled(const struct ata_device
*dev
)
1133 return ata_class_disabled(dev
->class);
1136 static inline unsigned int ata_dev_absent(const struct ata_device
*dev
)
1138 return ata_class_absent(dev
->class);
1144 static inline int ata_is_host_link(const struct ata_link
*link
)
1146 return link
== &link
->ap
->link
;
1149 static inline int ata_link_max_devices(const struct ata_link
*link
)
1151 if (ata_is_host_link(link
) && link
->ap
->flags
& ATA_FLAG_SLAVE_POSS
)
1156 static inline int ata_link_active(struct ata_link
*link
)
1158 return ata_tag_valid(link
->active_tag
) || link
->sactive
;
1161 static inline struct ata_link
*ata_port_first_link(struct ata_port
*ap
)
1163 if (ap
->nr_pmp_links
)
1164 return ap
->pmp_link
;
1168 static inline struct ata_link
*ata_port_next_link(struct ata_link
*link
)
1170 struct ata_port
*ap
= link
->ap
;
1172 if (link
== &ap
->link
) {
1173 if (!ap
->nr_pmp_links
)
1175 return ap
->pmp_link
;
1178 if (++link
- ap
->pmp_link
< ap
->nr_pmp_links
)
1183 #define __ata_port_for_each_link(lk, ap) \
1184 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1186 #define ata_port_for_each_link(link, ap) \
1187 for ((link) = ata_port_first_link(ap); (link); \
1188 (link) = ata_port_next_link(link))
1190 #define ata_link_for_each_dev(dev, link) \
1191 for ((dev) = (link)->device; \
1192 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1195 #define ata_link_for_each_dev_reverse(dev, link) \
1196 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1197 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1199 static inline u8
ata_chk_status(struct ata_port
*ap
)
1201 return ap
->ops
->check_status(ap
);
1205 * ata_ncq_enabled - Test whether NCQ is enabled
1206 * @dev: ATA device to test for
1209 * spin_lock_irqsave(host lock)
1212 * 1 if NCQ is enabled for @dev, 0 otherwise.
1214 static inline int ata_ncq_enabled(struct ata_device
*dev
)
1216 return (dev
->flags
& (ATA_DFLAG_PIO
| ATA_DFLAG_NCQ_OFF
|
1217 ATA_DFLAG_NCQ
)) == ATA_DFLAG_NCQ
;
1221 * ata_pause - Flush writes and pause 400 nanoseconds.
1222 * @ap: Port to wait for.
1225 * Inherited from caller.
1228 static inline void ata_pause(struct ata_port
*ap
)
1236 * ata_busy_wait - Wait for a port status register
1237 * @ap: Port to wait for.
1238 * @bits: bits that must be clear
1239 * @max: number of 10uS waits to perform
1241 * Waits up to max*10 microseconds for the selected bits in the port's
1242 * status register to be cleared.
1243 * Returns final value of status register.
1246 * Inherited from caller.
1249 static inline u8
ata_busy_wait(struct ata_port
*ap
, unsigned int bits
,
1256 status
= ata_chk_status(ap
);
1258 } while (status
!= 0xff && (status
& bits
) && (max
> 0));
1265 * ata_wait_idle - Wait for a port to be idle.
1266 * @ap: Port to wait for.
1268 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1269 * Returns final value of status register.
1272 * Inherited from caller.
1275 static inline u8
ata_wait_idle(struct ata_port
*ap
)
1277 u8 status
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 1000);
1280 if (status
!= 0xff && (status
& (ATA_BUSY
| ATA_DRQ
)))
1281 ata_port_printk(ap
, KERN_DEBUG
, "abnormal Status 0x%X\n",
1288 static inline void ata_qc_set_polling(struct ata_queued_cmd
*qc
)
1290 qc
->tf
.ctl
|= ATA_NIEN
;
1293 static inline struct ata_queued_cmd
*__ata_qc_from_tag(struct ata_port
*ap
,
1296 if (likely(ata_tag_valid(tag
)))
1297 return &ap
->qcmd
[tag
];
1301 static inline struct ata_queued_cmd
*ata_qc_from_tag(struct ata_port
*ap
,
1304 struct ata_queued_cmd
*qc
= __ata_qc_from_tag(ap
, tag
);
1306 if (unlikely(!qc
) || !ap
->ops
->error_handler
)
1309 if ((qc
->flags
& (ATA_QCFLAG_ACTIVE
|
1310 ATA_QCFLAG_FAILED
)) == ATA_QCFLAG_ACTIVE
)
1316 static inline void ata_tf_init(struct ata_device
*dev
, struct ata_taskfile
*tf
)
1318 memset(tf
, 0, sizeof(*tf
));
1320 tf
->ctl
= dev
->link
->ap
->ctl
;
1321 if (dev
->devno
== 0)
1322 tf
->device
= ATA_DEVICE_OBS
;
1324 tf
->device
= ATA_DEVICE_OBS
| ATA_DEV1
;
1327 static inline void ata_qc_reinit(struct ata_queued_cmd
*qc
)
1329 qc
->dma_dir
= DMA_NONE
;
1334 qc
->nbytes
= qc
->curbytes
= 0;
1339 qc
->sect_size
= ATA_SECT_SIZE
;
1341 ata_tf_init(qc
->dev
, &qc
->tf
);
1343 /* init result_tf such that it indicates normal completion */
1344 qc
->result_tf
.command
= ATA_DRDY
;
1345 qc
->result_tf
.feature
= 0;
1348 static inline int ata_try_flush_cache(const struct ata_device
*dev
)
1350 return ata_id_wcache_enabled(dev
->id
) ||
1351 ata_id_has_flush(dev
->id
) ||
1352 ata_id_has_flush_ext(dev
->id
);
1355 static inline unsigned int ac_err_mask(u8 status
)
1357 if (status
& (ATA_BUSY
| ATA_DRQ
))
1359 if (status
& (ATA_ERR
| ATA_DF
))
1364 static inline unsigned int __ac_err_mask(u8 status
)
1366 unsigned int mask
= ac_err_mask(status
);
1368 return AC_ERR_OTHER
;
1372 static inline int ata_pad_alloc(struct ata_port
*ap
, struct device
*dev
)
1375 ap
->pad
= dmam_alloc_coherent(dev
, ATA_DMA_PAD_BUF_SZ
,
1376 &ap
->pad_dma
, GFP_KERNEL
);
1377 return (ap
->pad
== NULL
) ? -ENOMEM
: 0;
1380 static inline void ata_pad_free(struct ata_port
*ap
, struct device
*dev
)
1382 dmam_free_coherent(dev
, ATA_DMA_PAD_BUF_SZ
, ap
->pad
, ap
->pad_dma
);
1385 static inline struct ata_port
*ata_shost_to_port(struct Scsi_Host
*host
)
1387 return *(struct ata_port
**)&host
->hostdata
[0];
1390 #endif /* __LINUX_LIBATA_H__ */