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_AN
= (1 << 7), /* device supports AN */
143 ATA_DFLAG_CFG_MASK
= (1 << 12) - 1,
145 ATA_DFLAG_PIO
= (1 << 12), /* device limited to PIO mode */
146 ATA_DFLAG_NCQ_OFF
= (1 << 13), /* device limited to non-NCQ mode */
147 ATA_DFLAG_SPUNDOWN
= (1 << 14), /* XXX: for spindown_compat */
148 ATA_DFLAG_INIT_MASK
= (1 << 16) - 1,
150 ATA_DFLAG_DETACH
= (1 << 16),
151 ATA_DFLAG_DETACHED
= (1 << 17),
153 ATA_DEV_UNKNOWN
= 0, /* unknown device */
154 ATA_DEV_ATA
= 1, /* ATA device */
155 ATA_DEV_ATA_UNSUP
= 2, /* ATA device (unsupported) */
156 ATA_DEV_ATAPI
= 3, /* ATAPI device */
157 ATA_DEV_ATAPI_UNSUP
= 4, /* ATAPI device (unsupported) */
158 ATA_DEV_PMP
= 5, /* SATA port multiplier */
159 ATA_DEV_PMP_UNSUP
= 6, /* SATA port multiplier (unsupported) */
160 ATA_DEV_SEMB
= 7, /* SEMB */
161 ATA_DEV_SEMB_UNSUP
= 8, /* SEMB (unsupported) */
162 ATA_DEV_NONE
= 9, /* no device */
164 /* struct ata_link flags */
165 ATA_LFLAG_HRST_TO_RESUME
= (1 << 0), /* hardreset to resume link */
166 ATA_LFLAG_SKIP_D2H_BSY
= (1 << 1), /* can't wait for the first D2H
167 * Register FIS clearing BSY */
168 ATA_LFLAG_NO_SRST
= (1 << 2), /* avoid softreset */
169 ATA_LFLAG_ASSUME_ATA
= (1 << 3), /* assume ATA class */
170 ATA_LFLAG_ASSUME_SEMB
= (1 << 4), /* assume SEMB class */
171 ATA_LFLAG_ASSUME_CLASS
= ATA_LFLAG_ASSUME_ATA
| ATA_LFLAG_ASSUME_SEMB
,
173 /* struct ata_port flags */
174 ATA_FLAG_SLAVE_POSS
= (1 << 0), /* host supports slave dev */
175 /* (doesn't imply presence) */
176 ATA_FLAG_SATA
= (1 << 1),
177 ATA_FLAG_NO_LEGACY
= (1 << 2), /* no legacy mode check */
178 ATA_FLAG_MMIO
= (1 << 3), /* use MMIO, not PIO */
179 ATA_FLAG_SRST
= (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
180 ATA_FLAG_SATA_RESET
= (1 << 5), /* (obsolete) use COMRESET */
181 ATA_FLAG_NO_ATAPI
= (1 << 6), /* No ATAPI support */
182 ATA_FLAG_PIO_DMA
= (1 << 7), /* PIO cmds via DMA */
183 ATA_FLAG_PIO_LBA48
= (1 << 8), /* Host DMA engine is LBA28 only */
184 ATA_FLAG_PIO_POLLING
= (1 << 9), /* use polling PIO if LLD
185 * doesn't handle PIO interrupts */
186 ATA_FLAG_NCQ
= (1 << 10), /* host supports NCQ */
187 ATA_FLAG_DEBUGMSG
= (1 << 13),
188 ATA_FLAG_IGN_SIMPLEX
= (1 << 15), /* ignore SIMPLEX */
189 ATA_FLAG_NO_IORDY
= (1 << 16), /* controller lacks iordy */
190 ATA_FLAG_ACPI_SATA
= (1 << 17), /* need native SATA ACPI layout */
191 ATA_FLAG_AN
= (1 << 18), /* controller supports AN */
192 ATA_FLAG_PMP
= (1 << 19), /* controller supports PMP */
194 /* The following flag belongs to ap->pflags but is kept in
195 * ap->flags because it's referenced in many LLDs and will be
196 * removed in not-too-distant future.
198 ATA_FLAG_DISABLED
= (1 << 23), /* port is disabled, ignore it */
200 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
202 /* struct ata_port pflags */
203 ATA_PFLAG_EH_PENDING
= (1 << 0), /* EH pending */
204 ATA_PFLAG_EH_IN_PROGRESS
= (1 << 1), /* EH in progress */
205 ATA_PFLAG_FROZEN
= (1 << 2), /* port is frozen */
206 ATA_PFLAG_RECOVERED
= (1 << 3), /* recovery action performed */
207 ATA_PFLAG_LOADING
= (1 << 4), /* boot/loading probe */
208 ATA_PFLAG_UNLOADING
= (1 << 5), /* module is unloading */
209 ATA_PFLAG_SCSI_HOTPLUG
= (1 << 6), /* SCSI hotplug scheduled */
210 ATA_PFLAG_INITIALIZING
= (1 << 7), /* being initialized, don't touch */
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 */
225 ATA_QCFLAG_FAILED
= (1 << 16), /* cmd failed and is owned by EH */
226 ATA_QCFLAG_SENSE_VALID
= (1 << 17), /* sense data valid */
227 ATA_QCFLAG_EH_SCHEDULED
= (1 << 18), /* EH scheduled (obsolete) */
230 ATA_HOST_SIMPLEX
= (1 << 0), /* Host is simplex, one DMA channel per host only */
231 ATA_HOST_STARTED
= (1 << 1), /* Host started */
233 /* bits 24:31 of host->flags are reserved for LLD specific flags */
235 /* various lengths of time */
236 ATA_TMOUT_BOOT
= 30 * HZ
, /* heuristic */
237 ATA_TMOUT_BOOT_QUICK
= 7 * HZ
, /* heuristic */
238 ATA_TMOUT_INTERNAL
= 30 * HZ
,
239 ATA_TMOUT_INTERNAL_QUICK
= 5 * HZ
,
253 /* SATA port states */
258 /* encoding various smaller bitmaps into a single
259 * unsigned int bitmap
266 ATA_SHIFT_MWDMA
= ATA_SHIFT_PIO
+ ATA_BITS_PIO
,
267 ATA_SHIFT_UDMA
= ATA_SHIFT_MWDMA
+ ATA_BITS_MWDMA
,
269 ATA_MASK_PIO
= ((1 << ATA_BITS_PIO
) - 1) << ATA_SHIFT_PIO
,
270 ATA_MASK_MWDMA
= ((1 << ATA_BITS_MWDMA
) - 1) << ATA_SHIFT_MWDMA
,
271 ATA_MASK_UDMA
= ((1 << ATA_BITS_UDMA
) - 1) << ATA_SHIFT_UDMA
,
273 /* size of buffer to pad xfers ending on unaligned boundaries */
275 ATA_DMA_PAD_BUF_SZ
= ATA_DMA_PAD_SZ
* ATA_MAX_QUEUE
,
280 /* return values for ->qc_defer */
284 /* desc_len for ata_eh_info and context */
285 ATA_EH_DESC_LEN
= 80,
287 /* reset / recovery action types */
288 ATA_EH_REVALIDATE
= (1 << 0),
289 ATA_EH_SOFTRESET
= (1 << 1),
290 ATA_EH_HARDRESET
= (1 << 2),
292 ATA_EH_RESET_MASK
= ATA_EH_SOFTRESET
| ATA_EH_HARDRESET
,
293 ATA_EH_PERDEV_MASK
= ATA_EH_REVALIDATE
,
295 /* ata_eh_info->flags */
296 ATA_EHI_HOTPLUGGED
= (1 << 0), /* could have been hotplugged */
297 ATA_EHI_RESUME_LINK
= (1 << 1), /* resume link (reset modifier) */
298 ATA_EHI_NO_AUTOPSY
= (1 << 2), /* no autopsy */
299 ATA_EHI_QUIET
= (1 << 3), /* be quiet */
301 ATA_EHI_DID_SOFTRESET
= (1 << 16), /* already soft-reset this port */
302 ATA_EHI_DID_HARDRESET
= (1 << 17), /* already soft-reset this port */
303 ATA_EHI_PRINTINFO
= (1 << 18), /* print configuration info */
304 ATA_EHI_SETMODE
= (1 << 19), /* configure transfer mode */
305 ATA_EHI_POST_SETMODE
= (1 << 20), /* revaildating after setmode */
307 ATA_EHI_DID_RESET
= ATA_EHI_DID_SOFTRESET
| ATA_EHI_DID_HARDRESET
,
308 ATA_EHI_RESET_MODIFIER_MASK
= ATA_EHI_RESUME_LINK
,
310 /* max tries if error condition is still set after ->error_handler */
311 ATA_EH_MAX_TRIES
= 5,
313 /* how hard are we gonna try to probe/recover devices */
314 ATA_PROBE_MAX_TRIES
= 3,
315 ATA_EH_DEV_TRIES
= 3,
316 ATA_EH_PMP_TRIES
= 5,
317 ATA_EH_PMP_LINK_TRIES
= 3,
319 SATA_PMP_SCR_TIMEOUT
= 250,
321 /* Horkage types. May be set by libata or controller on drives
322 (some horkage may be drive/controller pair dependant */
324 ATA_HORKAGE_DIAGNOSTIC
= (1 << 0), /* Failed boot diag */
325 ATA_HORKAGE_NODMA
= (1 << 1), /* DMA problems */
326 ATA_HORKAGE_NONCQ
= (1 << 2), /* Don't use NCQ */
327 ATA_HORKAGE_MAX_SEC_128
= (1 << 3), /* Limit max sects to 128 */
328 ATA_HORKAGE_BROKEN_HPA
= (1 << 4), /* Broken HPA */
331 enum hsm_task_states
{
332 HSM_ST_IDLE
, /* no command on going */
333 HSM_ST_FIRST
, /* (waiting the device to)
334 write CDB or first data block */
335 HSM_ST
, /* (waiting the device to) transfer data */
336 HSM_ST_LAST
, /* (waiting the device to) complete command */
337 HSM_ST_ERR
, /* error */
340 enum ata_completion_errors
{
341 AC_ERR_DEV
= (1 << 0), /* device reported error */
342 AC_ERR_HSM
= (1 << 1), /* host state machine violation */
343 AC_ERR_TIMEOUT
= (1 << 2), /* timeout */
344 AC_ERR_MEDIA
= (1 << 3), /* media error */
345 AC_ERR_ATA_BUS
= (1 << 4), /* ATA bus error */
346 AC_ERR_HOST_BUS
= (1 << 5), /* host bus error */
347 AC_ERR_SYSTEM
= (1 << 6), /* system error */
348 AC_ERR_INVALID
= (1 << 7), /* invalid argument */
349 AC_ERR_OTHER
= (1 << 8), /* unknown */
350 AC_ERR_NODEV_HINT
= (1 << 9), /* polling device detection hint */
351 AC_ERR_NCQ
= (1 << 10), /* marker for offending NCQ qc */
354 /* forward declarations */
356 struct ata_port_operations
;
359 struct ata_queued_cmd
;
362 typedef void (*ata_qc_cb_t
) (struct ata_queued_cmd
*qc
);
363 typedef int (*ata_prereset_fn_t
)(struct ata_link
*link
, unsigned long deadline
);
364 typedef int (*ata_reset_fn_t
)(struct ata_link
*link
, unsigned int *classes
,
365 unsigned long deadline
);
366 typedef void (*ata_postreset_fn_t
)(struct ata_link
*link
, unsigned int *classes
);
369 void __iomem
*cmd_addr
;
370 void __iomem
*data_addr
;
371 void __iomem
*error_addr
;
372 void __iomem
*feature_addr
;
373 void __iomem
*nsect_addr
;
374 void __iomem
*lbal_addr
;
375 void __iomem
*lbam_addr
;
376 void __iomem
*lbah_addr
;
377 void __iomem
*device_addr
;
378 void __iomem
*status_addr
;
379 void __iomem
*command_addr
;
380 void __iomem
*altstatus_addr
;
381 void __iomem
*ctl_addr
;
382 void __iomem
*bmdma_addr
;
383 void __iomem
*scr_addr
;
389 void __iomem
* const *iomap
;
390 unsigned int n_ports
;
392 const struct ata_port_operations
*ops
;
394 #ifdef CONFIG_ATA_ACPI
395 acpi_handle acpi_handle
;
397 struct ata_port
*simplex_claimed
; /* channel owning the DMA */
398 struct ata_port
*ports
[0];
401 struct ata_queued_cmd
{
403 struct ata_device
*dev
;
405 struct scsi_cmnd
*scsicmd
;
406 void (*scsidone
)(struct scsi_cmnd
*);
408 struct ata_taskfile tf
;
409 u8 cdb
[ATAPI_CDB_LEN
];
411 unsigned long flags
; /* ATA_QCFLAG_xxx */
414 unsigned int orig_n_elem
;
418 unsigned int pad_len
;
419 unsigned int sect_size
;
422 unsigned int curbytes
;
425 unsigned int cursg_ofs
;
427 struct scatterlist sgent
;
428 struct scatterlist pad_sgent
;
431 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
432 struct scatterlist
*__sg
;
434 unsigned int err_mask
;
435 struct ata_taskfile result_tf
;
436 ata_qc_cb_t complete_fn
;
442 struct ata_port_stats
{
443 unsigned long unhandled_irq
;
444 unsigned long idle_irq
;
445 unsigned long rw_reqbuf
;
448 struct ata_ering_entry
{
450 unsigned int err_mask
;
456 struct ata_ering_entry ring
[ATA_ERING_SIZE
];
460 struct ata_link
*link
;
461 unsigned int devno
; /* 0 or 1 */
462 unsigned long flags
; /* ATA_DFLAG_xxx */
463 unsigned int horkage
; /* List of broken features */
464 struct scsi_device
*sdev
; /* attached SCSI device */
465 #ifdef CONFIG_ATA_ACPI
466 acpi_handle acpi_handle
;
468 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
469 u64 n_sectors
; /* size of device, if ATA */
470 unsigned int class; /* ATA_DEV_xxx */
473 u16 id
[ATA_ID_WORDS
]; /* IDENTIFY xxx DEVICE data */
474 u32 gscr
[SATA_PMP_GSCR_DWORDS
]; /* PMP GSCR block */
480 unsigned int xfer_shift
; /* ATA_SHIFT_xxx */
482 unsigned int multi_count
; /* sectors count for
483 READ/WRITE MULTIPLE */
484 unsigned int max_sectors
; /* per-device max sectors */
485 unsigned int cdb_len
;
487 /* per-dev xfer mask */
488 unsigned int pio_mask
;
489 unsigned int mwdma_mask
;
490 unsigned int udma_mask
;
492 /* for CHS addressing */
493 u16 cylinders
; /* Number of cylinders */
494 u16 heads
; /* Number of heads */
495 u16 sectors
; /* Number of sectors per track */
498 struct ata_ering ering
;
502 /* Offset into struct ata_device. Fields above it are maintained
503 * acress device init. Fields below are zeroed.
505 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
508 struct ata_device
*dev
; /* offending device */
509 u32 serror
; /* SError from LLDD */
510 unsigned int err_mask
; /* port-wide err_mask */
511 unsigned int action
; /* ATA_EH_* action mask */
512 unsigned int dev_action
[ATA_MAX_DEVICES
]; /* dev EH action */
513 unsigned int flags
; /* ATA_EHI_* flags */
515 unsigned int probe_mask
;
517 char desc
[ATA_EH_DESC_LEN
];
521 struct ata_eh_context
{
522 struct ata_eh_info i
;
523 int tries
[ATA_MAX_DEVICES
];
524 unsigned int classes
[ATA_MAX_DEVICES
];
525 unsigned int did_probe_mask
;
528 struct ata_acpi_drive
534 struct ata_acpi_gtm
{
535 struct ata_acpi_drive drive
[2];
541 int pmp
; /* port multiplier port # */
543 unsigned int active_tag
; /* active tag on this link */
544 u32 sactive
; /* active NCQ commands */
546 unsigned int flags
; /* ATA_LFLAG_xxx */
548 unsigned int hw_sata_spd_limit
;
549 unsigned int sata_spd_limit
;
550 unsigned int sata_spd
; /* current SATA PHY speed */
552 /* record runtime error info, protected by host_set lock */
553 struct ata_eh_info eh_info
;
555 struct ata_eh_context eh_context
;
557 struct ata_device device
[ATA_MAX_DEVICES
];
561 struct Scsi_Host
*scsi_host
; /* our co-allocated scsi host */
562 const struct ata_port_operations
*ops
;
564 unsigned long flags
; /* ATA_FLAG_xxx */
565 unsigned int pflags
; /* ATA_PFLAG_xxx */
566 unsigned int print_id
; /* user visible unique port ID */
567 unsigned int port_no
; /* 0 based port no. inside the host */
569 struct ata_prd
*prd
; /* our SG list */
570 dma_addr_t prd_dma
; /* and its DMA mapping */
572 void *pad
; /* array of DMA pad buffers */
575 struct ata_ioports ioaddr
; /* ATA cmd/ctl/dma register blocks */
577 u8 ctl
; /* cache of ATA control register */
578 u8 last_ctl
; /* Cache last written value */
579 unsigned int pio_mask
;
580 unsigned int mwdma_mask
;
581 unsigned int udma_mask
;
582 unsigned int cbl
; /* cable type; ATA_CBL_xxx */
584 struct ata_queued_cmd qcmd
[ATA_MAX_QUEUE
];
585 unsigned long qc_allocated
;
586 unsigned int qc_active
;
587 int nr_active_links
; /* #links with active qcs */
589 struct ata_link link
; /* host default link */
591 int nr_pmp_links
; /* nr of available PMP links */
592 struct ata_link
*pmp_link
; /* array of PMP links */
593 struct ata_link
*excl_link
; /* for PMP qc exclusion */
595 struct ata_port_stats stats
;
596 struct ata_host
*host
;
599 void *port_task_data
;
600 struct delayed_work port_task
;
601 struct delayed_work hotplug_task
;
602 struct work_struct scsi_rescan_task
;
604 unsigned int hsm_task_state
;
607 struct list_head eh_done_q
;
608 wait_queue_head_t eh_wait_q
;
611 pm_message_t pm_mesg
;
614 struct timer_list fastdrain_timer
;
615 unsigned long fastdrain_cnt
;
619 #ifdef CONFIG_ATA_ACPI
620 acpi_handle acpi_handle
;
621 struct ata_acpi_gtm acpi_gtm
;
623 u8 sector_buf
[ATA_SECT_SIZE
]; /* owned by EH */
626 struct ata_port_operations
{
627 void (*dev_config
) (struct ata_device
*);
629 void (*set_piomode
) (struct ata_port
*, struct ata_device
*);
630 void (*set_dmamode
) (struct ata_port
*, struct ata_device
*);
631 unsigned long (*mode_filter
) (struct ata_device
*, unsigned long);
633 void (*tf_load
) (struct ata_port
*ap
, const struct ata_taskfile
*tf
);
634 void (*tf_read
) (struct ata_port
*ap
, struct ata_taskfile
*tf
);
636 void (*exec_command
)(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
637 u8 (*check_status
)(struct ata_port
*ap
);
638 u8 (*check_altstatus
)(struct ata_port
*ap
);
639 void (*dev_select
)(struct ata_port
*ap
, unsigned int device
);
641 void (*phy_reset
) (struct ata_port
*ap
); /* obsolete */
642 int (*set_mode
) (struct ata_link
*link
, struct ata_device
**r_failed_dev
);
644 int (*cable_detect
) (struct ata_port
*ap
);
646 int (*check_atapi_dma
) (struct ata_queued_cmd
*qc
);
648 void (*bmdma_setup
) (struct ata_queued_cmd
*qc
);
649 void (*bmdma_start
) (struct ata_queued_cmd
*qc
);
651 void (*data_xfer
) (struct ata_device
*, unsigned char *, unsigned int, int);
653 int (*qc_defer
) (struct ata_queued_cmd
*qc
);
654 void (*qc_prep
) (struct ata_queued_cmd
*qc
);
655 unsigned int (*qc_issue
) (struct ata_queued_cmd
*qc
);
657 /* port multiplier */
658 void (*pmp_attach
) (struct ata_port
*ap
);
659 void (*pmp_detach
) (struct ata_port
*ap
);
660 int (*pmp_read
) (struct ata_device
*dev
, int pmp
, int reg
, u32
*r_val
);
661 int (*pmp_write
) (struct ata_device
*dev
, int pmp
, int reg
, u32 val
);
663 /* Error handlers. ->error_handler overrides ->eng_timeout and
664 * indicates that new-style EH is in place.
666 void (*eng_timeout
) (struct ata_port
*ap
); /* obsolete */
668 void (*freeze
) (struct ata_port
*ap
);
669 void (*thaw
) (struct ata_port
*ap
);
670 void (*error_handler
) (struct ata_port
*ap
);
671 void (*post_internal_cmd
) (struct ata_queued_cmd
*qc
);
673 irq_handler_t irq_handler
;
674 void (*irq_clear
) (struct ata_port
*);
675 u8 (*irq_on
) (struct ata_port
*);
677 int (*scr_read
) (struct ata_port
*ap
, unsigned int sc_reg
, u32
*val
);
678 int (*scr_write
) (struct ata_port
*ap
, unsigned int sc_reg
, u32 val
);
680 int (*port_suspend
) (struct ata_port
*ap
, pm_message_t mesg
);
681 int (*port_resume
) (struct ata_port
*ap
);
683 int (*port_start
) (struct ata_port
*ap
);
684 void (*port_stop
) (struct ata_port
*ap
);
686 void (*host_stop
) (struct ata_host
*host
);
688 void (*bmdma_stop
) (struct ata_queued_cmd
*qc
);
689 u8 (*bmdma_status
) (struct ata_port
*ap
);
692 struct ata_port_info
{
693 struct scsi_host_template
*sht
;
695 unsigned long link_flags
;
696 unsigned long pio_mask
;
697 unsigned long mwdma_mask
;
698 unsigned long udma_mask
;
699 const struct ata_port_operations
*port_ops
;
700 irq_handler_t irq_handler
;
705 unsigned short mode
; /* ATA mode */
706 unsigned short setup
; /* t1 */
707 unsigned short act8b
; /* t2 for 8-bit I/O */
708 unsigned short rec8b
; /* t2i for 8-bit I/O */
709 unsigned short cyc8b
; /* t0 for 8-bit I/O */
710 unsigned short active
; /* t2 or tD */
711 unsigned short recover
; /* t2i or tK */
712 unsigned short cycle
; /* t0 */
713 unsigned short udma
; /* t2CYCTYP/2 */
716 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
718 extern const unsigned long sata_deb_timing_normal
[];
719 extern const unsigned long sata_deb_timing_hotplug
[];
720 extern const unsigned long sata_deb_timing_long
[];
722 extern const struct ata_port_operations ata_dummy_port_ops
;
723 extern const struct ata_port_info ata_dummy_port_info
;
725 static inline const unsigned long *
726 sata_ehc_deb_timing(struct ata_eh_context
*ehc
)
728 if (ehc
->i
.flags
& ATA_EHI_HOTPLUGGED
)
729 return sata_deb_timing_hotplug
;
731 return sata_deb_timing_normal
;
734 static inline int ata_port_is_dummy(struct ata_port
*ap
)
736 return ap
->ops
== &ata_dummy_port_ops
;
739 extern void sata_print_link_status(struct ata_link
*link
);
740 extern void ata_port_probe(struct ata_port
*);
741 extern void __sata_phy_reset(struct ata_port
*ap
);
742 extern void sata_phy_reset(struct ata_port
*ap
);
743 extern void ata_bus_reset(struct ata_port
*ap
);
744 extern int sata_set_spd(struct ata_link
*link
);
745 extern int sata_link_debounce(struct ata_link
*link
,
746 const unsigned long *params
, unsigned long deadline
);
747 extern int sata_link_resume(struct ata_link
*link
, const unsigned long *params
,
748 unsigned long deadline
);
749 extern int ata_std_prereset(struct ata_link
*link
, unsigned long deadline
);
750 extern int ata_std_softreset(struct ata_link
*link
, unsigned int *classes
,
751 unsigned long deadline
);
752 extern int sata_link_hardreset(struct ata_link
*link
,
753 const unsigned long *timing
, unsigned long deadline
);
754 extern int sata_std_hardreset(struct ata_link
*link
, unsigned int *class,
755 unsigned long deadline
);
756 extern void ata_std_postreset(struct ata_link
*link
, unsigned int *classes
);
757 extern void ata_port_disable(struct ata_port
*);
758 extern void ata_std_ports(struct ata_ioports
*ioaddr
);
760 extern int ata_pci_init_one (struct pci_dev
*pdev
,
761 const struct ata_port_info
* const * ppi
);
762 extern void ata_pci_remove_one (struct pci_dev
*pdev
);
764 extern void ata_pci_device_do_suspend(struct pci_dev
*pdev
, pm_message_t mesg
);
765 extern int __must_check
ata_pci_device_do_resume(struct pci_dev
*pdev
);
766 extern int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
);
767 extern int ata_pci_device_resume(struct pci_dev
*pdev
);
769 extern int ata_pci_clear_simplex(struct pci_dev
*pdev
);
770 #endif /* CONFIG_PCI */
771 extern struct ata_host
*ata_host_alloc(struct device
*dev
, int max_ports
);
772 extern struct ata_host
*ata_host_alloc_pinfo(struct device
*dev
,
773 const struct ata_port_info
* const * ppi
, int n_ports
);
774 extern int ata_host_start(struct ata_host
*host
);
775 extern int ata_host_register(struct ata_host
*host
,
776 struct scsi_host_template
*sht
);
777 extern int ata_host_activate(struct ata_host
*host
, int irq
,
778 irq_handler_t irq_handler
, unsigned long irq_flags
,
779 struct scsi_host_template
*sht
);
780 extern void ata_host_detach(struct ata_host
*host
);
781 extern void ata_host_init(struct ata_host
*, struct device
*,
782 unsigned long, const struct ata_port_operations
*);
783 extern int ata_scsi_detect(struct scsi_host_template
*sht
);
784 extern int ata_scsi_ioctl(struct scsi_device
*dev
, int cmd
, void __user
*arg
);
785 extern int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*));
786 extern void ata_scsi_media_change_notify(struct ata_device
*atadev
);
787 extern void ata_sas_port_destroy(struct ata_port
*);
788 extern struct ata_port
*ata_sas_port_alloc(struct ata_host
*,
789 struct ata_port_info
*, struct Scsi_Host
*);
790 extern int ata_sas_port_init(struct ata_port
*);
791 extern int ata_sas_port_start(struct ata_port
*ap
);
792 extern void ata_sas_port_stop(struct ata_port
*ap
);
793 extern int ata_sas_slave_configure(struct scsi_device
*, struct ata_port
*);
794 extern int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
795 struct ata_port
*ap
);
796 extern unsigned int ata_host_intr(struct ata_port
*ap
, struct ata_queued_cmd
*qc
);
797 extern int sata_scr_valid(struct ata_link
*link
);
798 extern int sata_scr_read(struct ata_link
*link
, int reg
, u32
*val
);
799 extern int sata_scr_write(struct ata_link
*link
, int reg
, u32 val
);
800 extern int sata_scr_write_flush(struct ata_link
*link
, int reg
, u32 val
);
801 extern int ata_link_online(struct ata_link
*link
);
802 extern int ata_link_offline(struct ata_link
*link
);
804 extern int ata_host_suspend(struct ata_host
*host
, pm_message_t mesg
);
805 extern void ata_host_resume(struct ata_host
*host
);
807 extern int ata_ratelimit(void);
808 extern int ata_busy_sleep(struct ata_port
*ap
,
809 unsigned long timeout_pat
, unsigned long timeout
);
810 extern int ata_wait_ready(struct ata_port
*ap
, unsigned long deadline
);
811 extern void ata_port_queue_task(struct ata_port
*ap
, work_func_t fn
,
812 void *data
, unsigned long delay
);
813 extern u32
ata_wait_register(void __iomem
*reg
, u32 mask
, u32 val
,
814 unsigned long interval_msec
,
815 unsigned long timeout_msec
);
816 extern unsigned int ata_dev_try_classify(struct ata_device
*dev
, int present
,
820 * Default driver ops implementations
822 extern void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
823 extern void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
);
824 extern void ata_tf_to_fis(const struct ata_taskfile
*tf
,
825 u8 pmp
, int is_cmd
, u8
*fis
);
826 extern void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
);
827 extern void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
);
828 extern void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
);
829 extern u8
ata_check_status(struct ata_port
*ap
);
830 extern u8
ata_altstatus(struct ata_port
*ap
);
831 extern void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
);
832 extern int ata_port_start (struct ata_port
*ap
);
833 extern int ata_sff_port_start (struct ata_port
*ap
);
834 extern irqreturn_t
ata_interrupt (int irq
, void *dev_instance
);
835 extern void ata_data_xfer(struct ata_device
*adev
, unsigned char *buf
,
836 unsigned int buflen
, int write_data
);
837 extern void ata_data_xfer_noirq(struct ata_device
*adev
, unsigned char *buf
,
838 unsigned int buflen
, int write_data
);
839 extern int ata_std_qc_defer(struct ata_queued_cmd
*qc
);
840 extern void ata_dumb_qc_prep(struct ata_queued_cmd
*qc
);
841 extern void ata_qc_prep(struct ata_queued_cmd
*qc
);
842 extern void ata_noop_qc_prep(struct ata_queued_cmd
*qc
);
843 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
);
844 extern void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
,
845 unsigned int buflen
);
846 extern void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
847 unsigned int n_elem
);
848 extern unsigned int ata_dev_classify(const struct ata_taskfile
*tf
);
849 extern void ata_dev_disable(struct ata_device
*adev
);
850 extern void ata_id_string(const u16
*id
, unsigned char *s
,
851 unsigned int ofs
, unsigned int len
);
852 extern void ata_id_c_string(const u16
*id
, unsigned char *s
,
853 unsigned int ofs
, unsigned int len
);
854 extern void ata_id_to_dma_mode(struct ata_device
*dev
, u8 unknown
);
855 extern void ata_bmdma_setup (struct ata_queued_cmd
*qc
);
856 extern void ata_bmdma_start (struct ata_queued_cmd
*qc
);
857 extern void ata_bmdma_stop(struct ata_queued_cmd
*qc
);
858 extern u8
ata_bmdma_status(struct ata_port
*ap
);
859 extern void ata_bmdma_irq_clear(struct ata_port
*ap
);
860 extern void ata_bmdma_freeze(struct ata_port
*ap
);
861 extern void ata_bmdma_thaw(struct ata_port
*ap
);
862 extern void ata_bmdma_drive_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
863 ata_reset_fn_t softreset
,
864 ata_reset_fn_t hardreset
,
865 ata_postreset_fn_t postreset
);
866 extern void ata_bmdma_error_handler(struct ata_port
*ap
);
867 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd
*qc
);
868 extern int ata_hsm_move(struct ata_port
*ap
, struct ata_queued_cmd
*qc
,
869 u8 status
, int in_wq
);
870 extern void ata_qc_complete(struct ata_queued_cmd
*qc
);
871 extern int ata_qc_complete_multiple(struct ata_port
*ap
, u32 qc_active
,
872 void (*finish_qc
)(struct ata_queued_cmd
*));
873 extern void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
874 void (*done
)(struct scsi_cmnd
*));
875 extern int ata_std_bios_param(struct scsi_device
*sdev
,
876 struct block_device
*bdev
,
877 sector_t capacity
, int geom
[]);
878 extern int ata_scsi_slave_config(struct scsi_device
*sdev
);
879 extern void ata_scsi_slave_destroy(struct scsi_device
*sdev
);
880 extern int ata_scsi_change_queue_depth(struct scsi_device
*sdev
,
882 extern struct ata_device
*ata_dev_pair(struct ata_device
*adev
);
883 extern int ata_do_set_mode(struct ata_link
*link
, struct ata_device
**r_failed_dev
);
884 extern u8
ata_irq_on(struct ata_port
*ap
);
886 extern int ata_cable_40wire(struct ata_port
*ap
);
887 extern int ata_cable_80wire(struct ata_port
*ap
);
888 extern int ata_cable_sata(struct ata_port
*ap
);
889 extern int ata_cable_unknown(struct ata_port
*ap
);
895 extern unsigned int ata_pio_need_iordy(const struct ata_device
*);
896 extern int ata_timing_compute(struct ata_device
*, unsigned short,
897 struct ata_timing
*, int, int);
898 extern void ata_timing_merge(const struct ata_timing
*,
899 const struct ata_timing
*, struct ata_timing
*,
903 ATA_TIMING_SETUP
= (1 << 0),
904 ATA_TIMING_ACT8B
= (1 << 1),
905 ATA_TIMING_REC8B
= (1 << 2),
906 ATA_TIMING_CYC8B
= (1 << 3),
907 ATA_TIMING_8BIT
= ATA_TIMING_ACT8B
| ATA_TIMING_REC8B
|
909 ATA_TIMING_ACTIVE
= (1 << 4),
910 ATA_TIMING_RECOVER
= (1 << 5),
911 ATA_TIMING_CYCLE
= (1 << 6),
912 ATA_TIMING_UDMA
= (1 << 7),
913 ATA_TIMING_ALL
= ATA_TIMING_SETUP
| ATA_TIMING_ACT8B
|
914 ATA_TIMING_REC8B
| ATA_TIMING_CYC8B
|
915 ATA_TIMING_ACTIVE
| ATA_TIMING_RECOVER
|
916 ATA_TIMING_CYCLE
| ATA_TIMING_UDMA
,
920 #ifdef CONFIG_ATA_ACPI
921 extern int ata_acpi_cbl_80wire(struct ata_port
*ap
);
923 static inline int ata_acpi_cbl_80wire(struct ata_port
*ap
) { return 0; }
928 unsigned int reg
; /* PCI config register to read */
929 unsigned int width
; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
934 extern int ata_pci_init_sff_host(struct ata_host
*host
);
935 extern int ata_pci_init_bmdma(struct ata_host
*host
);
936 extern int ata_pci_prepare_sff_host(struct pci_dev
*pdev
,
937 const struct ata_port_info
* const * ppi
,
938 struct ata_host
**r_host
);
939 extern int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
);
940 extern unsigned long ata_pci_default_filter(struct ata_device
*, unsigned long);
941 #endif /* CONFIG_PCI */
946 extern void ata_eng_timeout(struct ata_port
*ap
);
948 extern void ata_port_schedule_eh(struct ata_port
*ap
);
949 extern int ata_link_abort(struct ata_link
*link
);
950 extern int ata_port_abort(struct ata_port
*ap
);
951 extern int ata_port_freeze(struct ata_port
*ap
);
953 extern void ata_eh_freeze_port(struct ata_port
*ap
);
954 extern void ata_eh_thaw_port(struct ata_port
*ap
);
956 extern void ata_eh_qc_complete(struct ata_queued_cmd
*qc
);
957 extern void ata_eh_qc_retry(struct ata_queued_cmd
*qc
);
959 extern void ata_do_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
960 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
961 ata_postreset_fn_t postreset
);
966 #define ata_port_printk(ap, lv, fmt, args...) \
967 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
969 #define ata_link_printk(link, lv, fmt, args...) do { \
970 if ((link)->ap->nr_pmp_links) \
971 printk(lv"ata%u.%02u: "fmt, (link)->ap->print_id, \
972 (link)->pmp , ##args); \
974 printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args); \
977 #define ata_dev_printk(dev, lv, fmt, args...) \
978 printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, \
979 (dev)->link->pmp + (dev)->devno , ##args)
982 * ata_eh_info helpers
984 extern void __ata_ehi_push_desc(struct ata_eh_info
*ehi
, const char *fmt
, ...)
985 __attribute__ ((format (printf
, 2, 3)));
986 extern void ata_ehi_push_desc(struct ata_eh_info
*ehi
, const char *fmt
, ...)
987 __attribute__ ((format (printf
, 2, 3)));
988 extern void ata_ehi_clear_desc(struct ata_eh_info
*ehi
);
990 static inline void ata_ehi_schedule_probe(struct ata_eh_info
*ehi
)
992 ehi
->flags
|= ATA_EHI_RESUME_LINK
;
993 ehi
->action
|= ATA_EH_SOFTRESET
;
994 ehi
->probe_mask
|= (1 << ATA_MAX_DEVICES
) - 1;
997 static inline void ata_ehi_hotplugged(struct ata_eh_info
*ehi
)
999 ata_ehi_schedule_probe(ehi
);
1000 ehi
->flags
|= ATA_EHI_HOTPLUGGED
;
1001 ehi
->err_mask
|= AC_ERR_ATA_BUS
;
1005 * port description helpers
1007 extern void ata_port_desc(struct ata_port
*ap
, const char *fmt
, ...)
1008 __attribute__ ((format (printf
, 2, 3)));
1010 extern void ata_port_pbar_desc(struct ata_port
*ap
, int bar
, ssize_t offset
,
1018 ata_sg_is_last(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
1020 if (sg
== &qc
->pad_sgent
)
1024 if (((sg
- qc
->__sg
) + 1) == qc
->n_elem
)
1029 static inline struct scatterlist
*
1030 ata_qc_first_sg(struct ata_queued_cmd
*qc
)
1035 return &qc
->pad_sgent
;
1039 static inline struct scatterlist
*
1040 ata_qc_next_sg(struct scatterlist
*sg
, struct ata_queued_cmd
*qc
)
1042 if (sg
== &qc
->pad_sgent
)
1044 if (++sg
- qc
->__sg
< qc
->n_elem
)
1047 return &qc
->pad_sgent
;
1051 #define ata_for_each_sg(sg, qc) \
1052 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
1054 static inline unsigned int ata_tag_valid(unsigned int tag
)
1056 return (tag
< ATA_MAX_QUEUE
) ? 1 : 0;
1059 static inline unsigned int ata_tag_internal(unsigned int tag
)
1061 return tag
== ATA_MAX_QUEUE
- 1;
1067 static inline unsigned int ata_class_enabled(unsigned int class)
1069 return class == ATA_DEV_ATA
|| class == ATA_DEV_ATAPI
||
1070 class == ATA_DEV_PMP
|| class == ATA_DEV_SEMB
;
1073 static inline unsigned int ata_class_disabled(unsigned int class)
1075 return class == ATA_DEV_ATA_UNSUP
|| class == ATA_DEV_ATAPI_UNSUP
||
1076 class == ATA_DEV_PMP_UNSUP
|| class == ATA_DEV_SEMB_UNSUP
;
1079 static inline unsigned int ata_class_absent(unsigned int class)
1081 return !ata_class_enabled(class) && !ata_class_disabled(class);
1084 static inline unsigned int ata_dev_enabled(const struct ata_device
*dev
)
1086 return ata_class_enabled(dev
->class);
1089 static inline unsigned int ata_dev_disabled(const struct ata_device
*dev
)
1091 return ata_class_disabled(dev
->class);
1094 static inline unsigned int ata_dev_absent(const struct ata_device
*dev
)
1096 return ata_class_absent(dev
->class);
1102 static inline int ata_is_host_link(const struct ata_link
*link
)
1104 return link
== &link
->ap
->link
;
1107 static inline int ata_link_max_devices(const struct ata_link
*link
)
1109 if (ata_is_host_link(link
) && link
->ap
->flags
& ATA_FLAG_SLAVE_POSS
)
1114 static inline int ata_link_active(struct ata_link
*link
)
1116 return ata_tag_valid(link
->active_tag
) || link
->sactive
;
1119 static inline struct ata_link
*ata_port_first_link(struct ata_port
*ap
)
1121 if (ap
->nr_pmp_links
)
1122 return ap
->pmp_link
;
1126 static inline struct ata_link
*ata_port_next_link(struct ata_link
*link
)
1128 struct ata_port
*ap
= link
->ap
;
1130 if (link
== &ap
->link
) {
1131 if (!ap
->nr_pmp_links
)
1133 return ap
->pmp_link
;
1136 if (++link
- ap
->pmp_link
< ap
->nr_pmp_links
)
1141 #define __ata_port_for_each_link(lk, ap) \
1142 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1144 #define ata_port_for_each_link(link, ap) \
1145 for ((link) = ata_port_first_link(ap); (link); \
1146 (link) = ata_port_next_link(link))
1148 #define ata_link_for_each_dev(dev, link) \
1149 for ((dev) = (link)->device; \
1150 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1153 #define ata_link_for_each_dev_reverse(dev, link) \
1154 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1155 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1157 static inline u8
ata_chk_status(struct ata_port
*ap
)
1159 return ap
->ops
->check_status(ap
);
1163 * ata_ncq_enabled - Test whether NCQ is enabled
1164 * @dev: ATA device to test for
1167 * spin_lock_irqsave(host lock)
1170 * 1 if NCQ is enabled for @dev, 0 otherwise.
1172 static inline int ata_ncq_enabled(struct ata_device
*dev
)
1174 return (dev
->flags
& (ATA_DFLAG_PIO
| ATA_DFLAG_NCQ_OFF
|
1175 ATA_DFLAG_NCQ
)) == ATA_DFLAG_NCQ
;
1179 * ata_pause - Flush writes and pause 400 nanoseconds.
1180 * @ap: Port to wait for.
1183 * Inherited from caller.
1186 static inline void ata_pause(struct ata_port
*ap
)
1194 * ata_busy_wait - Wait for a port status register
1195 * @ap: Port to wait for.
1196 * @bits: bits that must be clear
1197 * @max: number of 10uS waits to perform
1199 * Waits up to max*10 microseconds for the selected bits in the port's
1200 * status register to be cleared.
1201 * Returns final value of status register.
1204 * Inherited from caller.
1207 static inline u8
ata_busy_wait(struct ata_port
*ap
, unsigned int bits
,
1214 status
= ata_chk_status(ap
);
1216 } while (status
!= 0xff && (status
& bits
) && (max
> 0));
1223 * ata_wait_idle - Wait for a port to be idle.
1224 * @ap: Port to wait for.
1226 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1227 * Returns final value of status register.
1230 * Inherited from caller.
1233 static inline u8
ata_wait_idle(struct ata_port
*ap
)
1235 u8 status
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 1000);
1238 if (status
!= 0xff && (status
& (ATA_BUSY
| ATA_DRQ
)))
1239 ata_port_printk(ap
, KERN_DEBUG
, "abnormal Status 0x%X\n",
1246 static inline void ata_qc_set_polling(struct ata_queued_cmd
*qc
)
1248 qc
->tf
.ctl
|= ATA_NIEN
;
1251 static inline struct ata_queued_cmd
*__ata_qc_from_tag(struct ata_port
*ap
,
1254 if (likely(ata_tag_valid(tag
)))
1255 return &ap
->qcmd
[tag
];
1259 static inline struct ata_queued_cmd
*ata_qc_from_tag(struct ata_port
*ap
,
1262 struct ata_queued_cmd
*qc
= __ata_qc_from_tag(ap
, tag
);
1264 if (unlikely(!qc
) || !ap
->ops
->error_handler
)
1267 if ((qc
->flags
& (ATA_QCFLAG_ACTIVE
|
1268 ATA_QCFLAG_FAILED
)) == ATA_QCFLAG_ACTIVE
)
1274 static inline void ata_tf_init(struct ata_device
*dev
, struct ata_taskfile
*tf
)
1276 memset(tf
, 0, sizeof(*tf
));
1278 tf
->ctl
= dev
->link
->ap
->ctl
;
1279 if (dev
->devno
== 0)
1280 tf
->device
= ATA_DEVICE_OBS
;
1282 tf
->device
= ATA_DEVICE_OBS
| ATA_DEV1
;
1285 static inline void ata_qc_reinit(struct ata_queued_cmd
*qc
)
1287 qc
->dma_dir
= DMA_NONE
;
1290 qc
->cursg
= qc
->cursg_ofs
= 0;
1291 qc
->nbytes
= qc
->curbytes
= 0;
1295 qc
->sect_size
= ATA_SECT_SIZE
;
1297 ata_tf_init(qc
->dev
, &qc
->tf
);
1299 /* init result_tf such that it indicates normal completion */
1300 qc
->result_tf
.command
= ATA_DRDY
;
1301 qc
->result_tf
.feature
= 0;
1304 static inline int ata_try_flush_cache(const struct ata_device
*dev
)
1306 return ata_id_wcache_enabled(dev
->id
) ||
1307 ata_id_has_flush(dev
->id
) ||
1308 ata_id_has_flush_ext(dev
->id
);
1311 static inline unsigned int ac_err_mask(u8 status
)
1313 if (status
& (ATA_BUSY
| ATA_DRQ
))
1315 if (status
& (ATA_ERR
| ATA_DF
))
1320 static inline unsigned int __ac_err_mask(u8 status
)
1322 unsigned int mask
= ac_err_mask(status
);
1324 return AC_ERR_OTHER
;
1328 static inline int ata_pad_alloc(struct ata_port
*ap
, struct device
*dev
)
1331 ap
->pad
= dmam_alloc_coherent(dev
, ATA_DMA_PAD_BUF_SZ
,
1332 &ap
->pad_dma
, GFP_KERNEL
);
1333 return (ap
->pad
== NULL
) ? -ENOMEM
: 0;
1336 static inline void ata_pad_free(struct ata_port
*ap
, struct device
*dev
)
1338 dmam_free_coherent(dev
, ATA_DMA_PAD_BUF_SZ
, ap
->pad
, ap
->pad_dma
);
1341 static inline struct ata_port
*ata_shost_to_port(struct Scsi_Host
*host
)
1343 return *(struct ata_port
**)&host
->hostdata
[0];
1346 #endif /* __LINUX_LIBATA_H__ */