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>
38 #include <linux/cdrom.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
111 /* various global constants */
112 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
113 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
120 ATA_DEF_BUSY_WAIT = 10000,
121 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
123 ATAPI_MAX_DRAIN = 16 << 10,
125 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
127 ATA_SHT_EMULATED = 1,
128 ATA_SHT_CMD_PER_LUN = 1,
129 ATA_SHT_THIS_ID = -1,
130 ATA_SHT_USE_CLUSTERING = 1,
132 /* struct ata_device stuff */
133 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
134 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
135 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
136 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
137 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
138 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
139 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
140 ATA_DFLAG_AN = (1 << 7), /* AN configured */
141 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
142 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
143 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
144 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
146 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
147 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
148 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
149 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
150 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
151 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
153 ATA_DFLAG_DETACH = (1 << 24),
154 ATA_DFLAG_DETACHED = (1 << 25),
156 ATA_DEV_UNKNOWN = 0, /* unknown device */
157 ATA_DEV_ATA = 1, /* ATA device */
158 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
159 ATA_DEV_ATAPI = 3, /* ATAPI device */
160 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
161 ATA_DEV_PMP = 5, /* SATA port multiplier */
162 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
163 ATA_DEV_SEMB = 7, /* SEMB */
164 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
165 ATA_DEV_NONE = 9, /* no device */
167 /* struct ata_link flags */
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,
172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
175 /* struct ata_port flags */
176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
177 /* (doesn't imply presence) */
178 ATA_FLAG_SATA = (1 << 1),
179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
187 * doesn't handle PIO interrupts */
188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
189 ATA_FLAG_DEBUGMSG = (1 << 13),
190 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
191 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
192 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
193 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
194 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
195 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
197 /* The following flag belongs to ap->pflags but is kept in
198 * ap->flags because it's referenced in many LLDs and will be
199 * removed in not-too-distant future.
201 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
203 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
205 /* struct ata_port pflags */
206 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
207 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
208 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
209 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
210 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
211 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
212 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
213 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
214 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
216 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
217 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
218 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
220 /* struct ata_queued_cmd flags */
221 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
222 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
223 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
224 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
225 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
226 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
227 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
229 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
230 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
231 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
234 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
235 ATA_HOST_STARTED = (1 << 1), /* Host started */
237 /* bits 24:31 of host->flags are reserved for LLD specific flags */
239 /* various lengths of time */
240 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
241 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
242 ATA_TMOUT_INTERNAL = 30 * HZ,
243 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
245 /* FIXME: GoVault needs 2s but we can't afford that without
246 * parallel probing. 800ms is enough for iVDR disk
247 * HHD424020F7SV00. Increase to 2secs when parallel probing
250 ATA_TMOUT_FF_WAIT = 4 * HZ / 5,
252 /* Spec mandates to wait for ">= 2ms" before checking status
253 * after reset. We wait 150ms, because that was the magic
254 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
255 * the period of time between when the ATA command register is
256 * written, and then status is checked. Because waiting for
257 * "a while" before checking status is fine, post SRST, we
258 * perform this magic delay here as well.
260 * Old drivers/ide uses the 2mS rule and then waits for ready.
262 ATA_WAIT_AFTER_RESET_MSECS = 150,
276 /* SATA port states */
281 /* encoding various smaller bitmaps into a single
282 * unsigned long bitmap
284 ATA_NR_PIO_MODES = 7,
285 ATA_NR_MWDMA_MODES = 5,
286 ATA_NR_UDMA_MODES = 8,
289 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
290 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
292 /* size of buffer to pad xfers ending on unaligned boundaries */
298 /* return values for ->qc_defer */
302 /* desc_len for ata_eh_info and context */
303 ATA_EH_DESC_LEN = 80,
305 /* reset / recovery action types */
306 ATA_EH_REVALIDATE = (1 << 0),
307 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
308 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
309 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
310 ATA_EH_ENABLE_LINK = (1 << 3),
311 ATA_EH_LPM = (1 << 4), /* link power management action */
313 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
315 /* ata_eh_info->flags */
316 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
317 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
318 ATA_EHI_QUIET = (1 << 3), /* be quiet */
320 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
321 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
322 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
323 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
324 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
326 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
328 /* max tries if error condition is still set after ->error_handler */
329 ATA_EH_MAX_TRIES = 5,
331 /* how hard are we gonna try to probe/recover devices */
332 ATA_PROBE_MAX_TRIES = 3,
333 ATA_EH_DEV_TRIES = 3,
334 ATA_EH_PMP_TRIES = 5,
335 ATA_EH_PMP_LINK_TRIES = 3,
337 SATA_PMP_SCR_TIMEOUT = 250,
339 /* Horkage types. May be set by libata or controller on drives
340 (some horkage may be drive/controller pair dependant */
342 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
343 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
344 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
345 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
346 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
347 ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */
348 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
349 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
350 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
351 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
353 /* DMA mask for user DMA control: User visible values; DO NOT
355 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
356 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
357 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
359 /* ATAPI command types */
360 ATAPI_READ = 0, /* READs */
361 ATAPI_WRITE = 1, /* WRITEs */
362 ATAPI_READ_CD = 2, /* READ CD [MSF] */
363 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
364 ATAPI_MISC = 4, /* the rest */
366 /* Timing constants */
367 ATA_TIMING_SETUP = (1 << 0),
368 ATA_TIMING_ACT8B = (1 << 1),
369 ATA_TIMING_REC8B = (1 << 2),
370 ATA_TIMING_CYC8B = (1 << 3),
371 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
373 ATA_TIMING_ACTIVE = (1 << 4),
374 ATA_TIMING_RECOVER = (1 << 5),
375 ATA_TIMING_CYCLE = (1 << 6),
376 ATA_TIMING_UDMA = (1 << 7),
377 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
378 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
379 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
380 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
384 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
386 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
388 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
392 enum hsm_task_states {
393 HSM_ST_IDLE, /* no command on going */
394 HSM_ST_FIRST, /* (waiting the device to)
395 write CDB or first data block */
396 HSM_ST, /* (waiting the device to) transfer data */
397 HSM_ST_LAST, /* (waiting the device to) complete command */
398 HSM_ST_ERR, /* error */
401 enum ata_completion_errors {
402 AC_ERR_DEV = (1 << 0), /* device reported error */
403 AC_ERR_HSM = (1 << 1), /* host state machine violation */
404 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
405 AC_ERR_MEDIA = (1 << 3), /* media error */
406 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
407 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
408 AC_ERR_SYSTEM = (1 << 6), /* system error */
409 AC_ERR_INVALID = (1 << 7), /* invalid argument */
410 AC_ERR_OTHER = (1 << 8), /* unknown */
411 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
412 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
415 /* forward declarations */
417 struct ata_port_operations;
420 struct ata_queued_cmd;
423 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
424 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
425 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
426 unsigned long deadline);
427 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
430 * host pm policy: If you alter this, you also need to alter libata-scsi.c
431 * (for the ascii descriptions)
439 extern struct class_device_attribute class_device_attr_link_power_management_policy;
442 void __iomem *cmd_addr;
443 void __iomem *data_addr;
444 void __iomem *error_addr;
445 void __iomem *feature_addr;
446 void __iomem *nsect_addr;
447 void __iomem *lbal_addr;
448 void __iomem *lbam_addr;
449 void __iomem *lbah_addr;
450 void __iomem *device_addr;
451 void __iomem *status_addr;
452 void __iomem *command_addr;
453 void __iomem *altstatus_addr;
454 void __iomem *ctl_addr;
455 void __iomem *bmdma_addr;
456 void __iomem *scr_addr;
462 void __iomem * const *iomap;
463 unsigned int n_ports;
465 struct ata_port_operations *ops;
467 #ifdef CONFIG_ATA_ACPI
468 acpi_handle acpi_handle;
470 struct ata_port *simplex_claimed; /* channel owning the DMA */
471 struct ata_port *ports[0];
474 struct ata_queued_cmd {
476 struct ata_device *dev;
478 struct scsi_cmnd *scsicmd;
479 void (*scsidone)(struct scsi_cmnd *);
481 struct ata_taskfile tf;
482 u8 cdb[ATAPI_CDB_LEN];
484 unsigned long flags; /* ATA_QCFLAG_xxx */
490 unsigned int sect_size;
493 unsigned int extrabytes;
494 unsigned int curbytes;
496 struct scatterlist *cursg;
497 unsigned int cursg_ofs;
499 struct scatterlist sgent;
501 struct scatterlist *sg;
503 unsigned int err_mask;
504 struct ata_taskfile result_tf;
505 ata_qc_cb_t complete_fn;
511 struct ata_port_stats {
512 unsigned long unhandled_irq;
513 unsigned long idle_irq;
514 unsigned long rw_reqbuf;
517 struct ata_ering_entry {
519 unsigned int err_mask;
525 struct ata_ering_entry ring[ATA_ERING_SIZE];
529 struct ata_link *link;
530 unsigned int devno; /* 0 or 1 */
531 unsigned long flags; /* ATA_DFLAG_xxx */
532 unsigned int horkage; /* List of broken features */
533 struct scsi_device *sdev; /* attached SCSI device */
534 #ifdef CONFIG_ATA_ACPI
535 acpi_handle acpi_handle;
536 union acpi_object *gtf_cache;
538 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
539 u64 n_sectors; /* size of device, if ATA */
540 unsigned int class; /* ATA_DEV_xxx */
543 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
544 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
550 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
552 unsigned int multi_count; /* sectors count for
553 READ/WRITE MULTIPLE */
554 unsigned int max_sectors; /* per-device max sectors */
555 unsigned int cdb_len;
557 /* per-dev xfer mask */
558 unsigned long pio_mask;
559 unsigned long mwdma_mask;
560 unsigned long udma_mask;
562 /* for CHS addressing */
563 u16 cylinders; /* Number of cylinders */
564 u16 heads; /* Number of heads */
565 u16 sectors; /* Number of sectors per track */
568 struct ata_ering ering;
572 /* Offset into struct ata_device. Fields above it are maintained
573 * acress device init. Fields below are zeroed.
575 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
578 struct ata_device *dev; /* offending device */
579 u32 serror; /* SError from LLDD */
580 unsigned int err_mask; /* port-wide err_mask */
581 unsigned int action; /* ATA_EH_* action mask */
582 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
583 unsigned int flags; /* ATA_EHI_* flags */
585 unsigned int probe_mask;
587 char desc[ATA_EH_DESC_LEN];
591 struct ata_eh_context {
592 struct ata_eh_info i;
593 int tries[ATA_MAX_DEVICES];
594 unsigned int classes[ATA_MAX_DEVICES];
595 unsigned int did_probe_mask;
596 unsigned int saved_ncq_enabled;
597 u8 saved_xfer_mode[ATA_MAX_DEVICES];
600 struct ata_acpi_drive
606 struct ata_acpi_gtm {
607 struct ata_acpi_drive drive[2];
613 int pmp; /* port multiplier port # */
615 unsigned int active_tag; /* active tag on this link */
616 u32 sactive; /* active NCQ commands */
618 unsigned int flags; /* ATA_LFLAG_xxx */
620 unsigned int hw_sata_spd_limit;
621 unsigned int sata_spd_limit;
622 unsigned int sata_spd; /* current SATA PHY speed */
624 /* record runtime error info, protected by host_set lock */
625 struct ata_eh_info eh_info;
627 struct ata_eh_context eh_context;
629 struct ata_device device[ATA_MAX_DEVICES];
633 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
634 struct ata_port_operations *ops;
636 unsigned long flags; /* ATA_FLAG_xxx */
637 unsigned int pflags; /* ATA_PFLAG_xxx */
638 unsigned int print_id; /* user visible unique port ID */
639 unsigned int port_no; /* 0 based port no. inside the host */
641 struct ata_prd *prd; /* our SG list */
642 dma_addr_t prd_dma; /* and its DMA mapping */
644 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
646 u8 ctl; /* cache of ATA control register */
647 u8 last_ctl; /* Cache last written value */
648 unsigned int pio_mask;
649 unsigned int mwdma_mask;
650 unsigned int udma_mask;
651 unsigned int cbl; /* cable type; ATA_CBL_xxx */
653 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
654 unsigned long qc_allocated;
655 unsigned int qc_active;
656 int nr_active_links; /* #links with active qcs */
658 struct ata_link link; /* host default link */
660 int nr_pmp_links; /* nr of available PMP links */
661 struct ata_link *pmp_link; /* array of PMP links */
662 struct ata_link *excl_link; /* for PMP qc exclusion */
664 struct ata_port_stats stats;
665 struct ata_host *host;
668 void *port_task_data;
669 struct delayed_work port_task;
670 struct delayed_work hotplug_task;
671 struct work_struct scsi_rescan_task;
673 unsigned int hsm_task_state;
676 struct list_head eh_done_q;
677 wait_queue_head_t eh_wait_q;
680 pm_message_t pm_mesg;
682 enum link_pm pm_policy;
684 struct timer_list fastdrain_timer;
685 unsigned long fastdrain_cnt;
689 #ifdef CONFIG_ATA_ACPI
690 acpi_handle acpi_handle;
691 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
693 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
696 /* The following initializer overrides a method to NULL whether one of
697 * its parent has the method defined or not. This is equivalent to
698 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
699 * expression and thus can't be used as an initializer.
701 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
703 struct ata_port_operations {
707 int (*qc_defer)(struct ata_queued_cmd *qc);
708 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
709 void (*qc_prep)(struct ata_queued_cmd *qc);
710 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
713 * Configuration and exception handling
715 int (*cable_detect)(struct ata_port *ap);
716 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
717 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
718 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
719 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
721 void (*dev_config)(struct ata_device *dev);
723 void (*freeze)(struct ata_port *ap);
724 void (*thaw)(struct ata_port *ap);
725 ata_prereset_fn_t prereset;
726 ata_reset_fn_t softreset;
727 ata_reset_fn_t hardreset;
728 ata_postreset_fn_t postreset;
729 ata_prereset_fn_t pmp_prereset;
730 ata_reset_fn_t pmp_softreset;
731 ata_reset_fn_t pmp_hardreset;
732 ata_postreset_fn_t pmp_postreset;
733 void (*error_handler)(struct ata_port *ap);
734 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
739 int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val);
740 int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val);
741 void (*pmp_attach)(struct ata_port *ap);
742 void (*pmp_detach)(struct ata_port *ap);
743 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
744 void (*disable_pm)(struct ata_port *ap);
747 * Start, stop, suspend and resume
749 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
750 int (*port_resume)(struct ata_port *ap);
751 int (*port_start)(struct ata_port *ap);
752 void (*port_stop)(struct ata_port *ap);
753 void (*host_stop)(struct ata_host *host);
756 * SFF / taskfile oriented ops
758 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
759 u8 (*sff_check_status)(struct ata_port *ap);
760 u8 (*sff_check_altstatus)(struct ata_port *ap);
761 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
762 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
763 void (*sff_exec_command)(struct ata_port *ap,
764 const struct ata_taskfile *tf);
765 unsigned int (*sff_data_xfer)(struct ata_device *dev,
766 unsigned char *buf, unsigned int buflen, int rw);
767 u8 (*sff_irq_on)(struct ata_port *);
768 void (*sff_irq_clear)(struct ata_port *);
770 void (*bmdma_setup)(struct ata_queued_cmd *qc);
771 void (*bmdma_start)(struct ata_queued_cmd *qc);
772 void (*bmdma_stop)(struct ata_queued_cmd *qc);
773 u8 (*bmdma_status)(struct ata_port *ap);
778 void (*phy_reset)(struct ata_port *ap);
779 void (*eng_timeout)(struct ata_port *ap);
782 * ->inherits must be the last field and all the preceding
783 * fields must be pointers.
785 const struct ata_port_operations *inherits;
788 struct ata_port_info {
790 unsigned long link_flags;
791 unsigned long pio_mask;
792 unsigned long mwdma_mask;
793 unsigned long udma_mask;
794 struct ata_port_operations *port_ops;
799 unsigned short mode; /* ATA mode */
800 unsigned short setup; /* t1 */
801 unsigned short act8b; /* t2 for 8-bit I/O */
802 unsigned short rec8b; /* t2i for 8-bit I/O */
803 unsigned short cyc8b; /* t0 for 8-bit I/O */
804 unsigned short active; /* t2 or tD */
805 unsigned short recover; /* t2i or tK */
806 unsigned short cycle; /* t0 */
807 unsigned short udma; /* t2CYCTYP/2 */
810 #define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
813 * Core layer - drivers/ata/libata-core.c
815 extern const unsigned long sata_deb_timing_normal[];
816 extern const unsigned long sata_deb_timing_hotplug[];
817 extern const unsigned long sata_deb_timing_long[];
819 extern struct ata_port_operations ata_dummy_port_ops;
820 extern const struct ata_port_info ata_dummy_port_info;
822 static inline const unsigned long *
823 sata_ehc_deb_timing(struct ata_eh_context *ehc)
825 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
826 return sata_deb_timing_hotplug;
828 return sata_deb_timing_normal;
831 static inline int ata_port_is_dummy(struct ata_port *ap)
833 return ap->ops == &ata_dummy_port_ops;
836 extern void sata_print_link_status(struct ata_link *link);
837 extern void ata_port_probe(struct ata_port *);
838 extern int sata_set_spd(struct ata_link *link);
839 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
840 extern int sata_link_debounce(struct ata_link *link,
841 const unsigned long *params, unsigned long deadline);
842 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
843 unsigned long deadline);
844 extern int sata_link_hardreset(struct ata_link *link,
845 const unsigned long *timing, unsigned long deadline);
846 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
847 extern void ata_port_disable(struct ata_port *);
849 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
850 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
851 const struct ata_port_info * const * ppi, int n_ports);
852 extern int ata_host_start(struct ata_host *host);
853 extern int ata_host_register(struct ata_host *host,
854 struct scsi_host_template *sht);
855 extern int ata_host_activate(struct ata_host *host, int irq,
856 irq_handler_t irq_handler, unsigned long irq_flags,
857 struct scsi_host_template *sht);
858 extern void ata_host_detach(struct ata_host *host);
859 extern void ata_host_init(struct ata_host *, struct device *,
860 unsigned long, struct ata_port_operations *);
861 extern int ata_scsi_detect(struct scsi_host_template *sht);
862 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
863 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
864 extern void ata_sas_port_destroy(struct ata_port *);
865 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
866 struct ata_port_info *, struct Scsi_Host *);
867 extern int ata_sas_port_init(struct ata_port *);
868 extern int ata_sas_port_start(struct ata_port *ap);
869 extern void ata_sas_port_stop(struct ata_port *ap);
870 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
871 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
872 struct ata_port *ap);
873 extern int sata_scr_valid(struct ata_link *link);
874 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
875 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
876 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
877 extern int ata_link_online(struct ata_link *link);
878 extern int ata_link_offline(struct ata_link *link);
880 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
881 extern void ata_host_resume(struct ata_host *host);
883 extern int ata_ratelimit(void);
884 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
885 unsigned long interval_msec,
886 unsigned long timeout_msec);
887 extern int atapi_cmd_type(u8 opcode);
888 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
889 u8 pmp, int is_cmd, u8 *fis);
890 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
891 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
892 unsigned long mwdma_mask, unsigned long udma_mask);
893 extern void ata_unpack_xfermask(unsigned long xfer_mask,
894 unsigned long *pio_mask, unsigned long *mwdma_mask,
895 unsigned long *udma_mask);
896 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
897 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
898 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
899 extern const char *ata_mode_string(unsigned long xfer_mask);
900 extern unsigned long ata_id_xfermask(const u16 *id);
901 extern void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
902 extern int ata_port_start(struct ata_port *ap);
903 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
904 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
905 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
906 unsigned int n_elem);
907 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
908 extern void ata_dev_disable(struct ata_device *adev);
909 extern void ata_id_string(const u16 *id, unsigned char *s,
910 unsigned int ofs, unsigned int len);
911 extern void ata_id_c_string(const u16 *id, unsigned char *s,
912 unsigned int ofs, unsigned int len);
913 extern void ata_qc_complete(struct ata_queued_cmd *qc);
914 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
915 void (*finish_qc)(struct ata_queued_cmd *));
916 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
917 void (*done)(struct scsi_cmnd *));
918 extern int ata_std_bios_param(struct scsi_device *sdev,
919 struct block_device *bdev,
920 sector_t capacity, int geom[]);
921 extern int ata_scsi_slave_config(struct scsi_device *sdev);
922 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
923 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
925 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
926 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
928 extern int ata_cable_40wire(struct ata_port *ap);
929 extern int ata_cable_80wire(struct ata_port *ap);
930 extern int ata_cable_sata(struct ata_port *ap);
931 extern int ata_cable_ignore(struct ata_port *ap);
932 extern int ata_cable_unknown(struct ata_port *ap);
935 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
936 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
937 extern int ata_timing_compute(struct ata_device *, unsigned short,
938 struct ata_timing *, int, int);
939 extern void ata_timing_merge(const struct ata_timing *,
940 const struct ata_timing *, struct ata_timing *,
942 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
949 unsigned int reg; /* PCI config register to read */
950 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
955 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
956 extern void ata_pci_remove_one(struct pci_dev *pdev);
959 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
960 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
961 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
962 extern int ata_pci_device_resume(struct pci_dev *pdev);
963 #endif /* CONFIG_PM */
964 #endif /* CONFIG_PCI */
967 * ACPI - drivers/ata/libata-acpi.c
969 #ifdef CONFIG_ATA_ACPI
970 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
972 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
973 return &ap->__acpi_init_gtm;
976 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
977 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
978 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
979 const struct ata_acpi_gtm *gtm);
980 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
982 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
987 static inline int ata_acpi_stm(const struct ata_port *ap,
988 struct ata_acpi_gtm *stm)
993 static inline int ata_acpi_gtm(const struct ata_port *ap,
994 struct ata_acpi_gtm *stm)
999 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1000 const struct ata_acpi_gtm *gtm)
1005 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1006 const struct ata_acpi_gtm *gtm)
1013 * PMP - drivers/ata/libata-pmp.c
1015 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1016 extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
1017 extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
1018 unsigned long deadline);
1019 extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class);
1020 extern void sata_pmp_error_handler(struct ata_port *ap);
1023 * EH - drivers/ata/libata-eh.c
1025 extern void ata_port_schedule_eh(struct ata_port *ap);
1026 extern int ata_link_abort(struct ata_link *link);
1027 extern int ata_port_abort(struct ata_port *ap);
1028 extern int ata_port_freeze(struct ata_port *ap);
1029 extern int sata_async_notification(struct ata_port *ap);
1031 extern void ata_eh_freeze_port(struct ata_port *ap);
1032 extern void ata_eh_thaw_port(struct ata_port *ap);
1034 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1035 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1037 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1038 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1039 ata_postreset_fn_t postreset);
1040 extern void ata_std_error_handler(struct ata_port *ap);
1043 * Base operations to inherit from and initializers for sht
1047 * base : Common to all libata drivers.
1048 * sata : SATA controllers w/ native interface.
1049 * pmp : SATA controllers w/ PMP support.
1050 * sff : SFF ATA controllers w/o BMDMA support.
1051 * bmdma : SFF ATA controllers w/ BMDMA support.
1055 * BASE : Common to all libata drivers. The user must set
1056 * sg_tablesize and dma_boundary.
1057 * PIO : SFF ATA controllers w/ only PIO support.
1058 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1059 * dma_boundary are set to BMDMA limits.
1060 * NCQ : SATA controllers supporting NCQ. The user must set
1061 * sg_tablesize, dma_boundary and can_queue.
1063 extern const struct ata_port_operations ata_base_port_ops;
1064 extern const struct ata_port_operations sata_port_ops;
1065 extern const struct ata_port_operations sata_pmp_port_ops;
1067 #define ATA_BASE_SHT(drv_name) \
1068 .module = THIS_MODULE, \
1070 .ioctl = ata_scsi_ioctl, \
1071 .queuecommand = ata_scsi_queuecmd, \
1072 .can_queue = ATA_DEF_QUEUE, \
1073 .this_id = ATA_SHT_THIS_ID, \
1074 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1075 .emulated = ATA_SHT_EMULATED, \
1076 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1077 .proc_name = drv_name, \
1078 .slave_configure = ata_scsi_slave_config, \
1079 .slave_destroy = ata_scsi_slave_destroy, \
1080 .bios_param = ata_std_bios_param
1082 #define ATA_NCQ_SHT(drv_name) \
1083 ATA_BASE_SHT(drv_name), \
1084 .change_queue_depth = ata_scsi_change_queue_depth
1089 #define ata_port_printk(ap, lv, fmt, args...) \
1090 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1092 #define ata_link_printk(link, lv, fmt, args...) do { \
1093 if ((link)->ap->nr_pmp_links) \
1094 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1095 (link)->pmp , ##args); \
1097 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1100 #define ata_dev_printk(dev, lv, fmt, args...) \
1101 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1102 (dev)->link->pmp + (dev)->devno , ##args)
1105 * ata_eh_info helpers
1107 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1108 __attribute__ ((format (printf, 2, 3)));
1109 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1110 __attribute__ ((format (printf, 2, 3)));
1111 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1113 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1115 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1116 ehi->flags |= ATA_EHI_HOTPLUGGED;
1117 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1118 ehi->err_mask |= AC_ERR_ATA_BUS;
1122 * port description helpers
1124 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1125 __attribute__ ((format (printf, 2, 3)));
1127 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1131 static inline unsigned int ata_tag_valid(unsigned int tag)
1133 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1136 static inline unsigned int ata_tag_internal(unsigned int tag)
1138 return tag == ATA_TAG_INTERNAL;
1144 static inline unsigned int ata_class_enabled(unsigned int class)
1146 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1147 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1150 static inline unsigned int ata_class_disabled(unsigned int class)
1152 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1153 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1156 static inline unsigned int ata_class_absent(unsigned int class)
1158 return !ata_class_enabled(class) && !ata_class_disabled(class);
1161 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1163 return ata_class_enabled(dev->class);
1166 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1168 return ata_class_disabled(dev->class);
1171 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1173 return ata_class_absent(dev->class);
1179 static inline int ata_is_host_link(const struct ata_link *link)
1181 return link == &link->ap->link;
1184 static inline int ata_link_max_devices(const struct ata_link *link)
1186 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1191 static inline int ata_link_active(struct ata_link *link)
1193 return ata_tag_valid(link->active_tag) || link->sactive;
1196 static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1198 if (ap->nr_pmp_links)
1199 return ap->pmp_link;
1203 static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1205 struct ata_port *ap = link->ap;
1207 if (link == &ap->link) {
1208 if (!ap->nr_pmp_links)
1210 return ap->pmp_link;
1213 if (++link < ap->nr_pmp_links + ap->pmp_link)
1218 #define __ata_port_for_each_link(lk, ap) \
1219 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1221 #define ata_port_for_each_link(link, ap) \
1222 for ((link) = ata_port_first_link(ap); (link); \
1223 (link) = ata_port_next_link(link))
1225 #define ata_link_for_each_dev(dev, link) \
1226 for ((dev) = (link)->device; \
1227 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1230 #define ata_link_for_each_dev_reverse(dev, link) \
1231 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1232 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1235 * ata_ncq_enabled - Test whether NCQ is enabled
1236 * @dev: ATA device to test for
1239 * spin_lock_irqsave(host lock)
1242 * 1 if NCQ is enabled for @dev, 0 otherwise.
1244 static inline int ata_ncq_enabled(struct ata_device *dev)
1246 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1247 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1250 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1252 qc->tf.ctl |= ATA_NIEN;
1255 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1258 if (likely(ata_tag_valid(tag)))
1259 return &ap->qcmd[tag];
1263 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1266 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1268 if (unlikely(!qc) || !ap->ops->error_handler)
1271 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1272 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1278 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1280 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1283 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1285 memset(tf, 0, sizeof(*tf));
1287 tf->ctl = dev->link->ap->ctl;
1288 if (dev->devno == 0)
1289 tf->device = ATA_DEVICE_OBS;
1291 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1294 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1296 qc->dma_dir = DMA_NONE;
1301 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1304 qc->sect_size = ATA_SECT_SIZE;
1306 ata_tf_init(qc->dev, &qc->tf);
1308 /* init result_tf such that it indicates normal completion */
1309 qc->result_tf.command = ATA_DRDY;
1310 qc->result_tf.feature = 0;
1313 static inline int ata_try_flush_cache(const struct ata_device *dev)
1315 return ata_id_wcache_enabled(dev->id) ||
1316 ata_id_has_flush(dev->id) ||
1317 ata_id_has_flush_ext(dev->id);
1320 static inline unsigned int ac_err_mask(u8 status)
1322 if (status & (ATA_BUSY | ATA_DRQ))
1324 if (status & (ATA_ERR | ATA_DF))
1329 static inline unsigned int __ac_err_mask(u8 status)
1331 unsigned int mask = ac_err_mask(status);
1333 return AC_ERR_OTHER;
1337 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1339 return *(struct ata_port **)&host->hostdata[0];
1342 /**************************************************************************
1343 * SFF - drivers/ata/libata-sff.c
1345 extern const struct ata_port_operations ata_sff_port_ops;
1346 extern const struct ata_port_operations ata_bmdma_port_ops;
1348 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1349 #define ATA_PIO_SHT(drv_name) \
1350 ATA_BASE_SHT(drv_name), \
1351 .sg_tablesize = LIBATA_MAX_PRD, \
1352 .dma_boundary = ATA_DMA_BOUNDARY
1354 #define ATA_BMDMA_SHT(drv_name) \
1355 ATA_BASE_SHT(drv_name), \
1356 .sg_tablesize = LIBATA_MAX_PRD, \
1357 .dma_boundary = ATA_DMA_BOUNDARY
1359 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1360 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1361 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1362 extern u8 ata_sff_check_status(struct ata_port *ap);
1363 extern u8 ata_sff_altstatus(struct ata_port *ap);
1364 extern int ata_sff_busy_sleep(struct ata_port *ap,
1365 unsigned long timeout_pat, unsigned long timeout);
1366 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1367 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1368 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1369 extern void ata_sff_exec_command(struct ata_port *ap,
1370 const struct ata_taskfile *tf);
1371 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1372 unsigned char *buf, unsigned int buflen, int rw);
1373 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1374 unsigned char *buf, unsigned int buflen, int rw);
1375 extern u8 ata_sff_irq_on(struct ata_port *ap);
1376 extern void ata_sff_irq_clear(struct ata_port *ap);
1377 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1378 u8 status, int in_wq);
1379 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1380 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1381 struct ata_queued_cmd *qc);
1382 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1383 extern void ata_sff_freeze(struct ata_port *ap);
1384 extern void ata_sff_thaw(struct ata_port *ap);
1385 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1386 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1388 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1389 unsigned long deadline);
1390 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1391 unsigned long deadline);
1392 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1393 unsigned long deadline);
1394 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1395 extern void ata_sff_error_handler(struct ata_port *ap);
1396 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1397 extern int ata_sff_port_start(struct ata_port *ap);
1398 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1399 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1400 unsigned long xfer_mask);
1401 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1402 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1403 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1404 extern u8 ata_bmdma_status(struct ata_port *ap);
1405 extern void ata_bus_reset(struct ata_port *ap);
1408 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1409 extern int ata_pci_bmdma_init(struct ata_host *host);
1410 extern int ata_pci_sff_init_host(struct ata_host *host);
1411 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1412 const struct ata_port_info * const * ppi,
1413 struct ata_host **r_host);
1414 extern int ata_pci_sff_activate_host(struct ata_host *host,
1415 irq_handler_t irq_handler,
1416 struct scsi_host_template *sht);
1417 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1418 const struct ata_port_info * const * ppi,
1419 struct scsi_host_template *sht, void *host_priv);
1420 #endif /* CONFIG_PCI */
1423 * ata_sff_pause - Flush writes and pause 400 nanoseconds.
1424 * @ap: Port to wait for.
1427 * Inherited from caller.
1429 static inline void ata_sff_pause(struct ata_port *ap)
1431 ata_sff_altstatus(ap);
1436 * ata_sff_busy_wait - Wait for a port status register
1437 * @ap: Port to wait for.
1438 * @bits: bits that must be clear
1439 * @max: number of 10uS waits to perform
1441 * Waits up to max*10 microseconds for the selected bits in the port's
1442 * status register to be cleared.
1443 * Returns final value of status register.
1446 * Inherited from caller.
1448 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1455 status = ap->ops->sff_check_status(ap);
1457 } while (status != 0xff && (status & bits) && (max > 0));
1463 * ata_wait_idle - Wait for a port to be idle.
1464 * @ap: Port to wait for.
1466 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1467 * Returns final value of status register.
1470 * Inherited from caller.
1472 static inline u8 ata_wait_idle(struct ata_port *ap)
1474 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1477 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1478 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1485 #endif /* __LINUX_LIBATA_H__ */