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/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
40 #include <linux/sched.h>
43 * Define if arch has non-standard setup. This is a _PCI_ standard
44 * not a legacy or ISA standard.
46 #ifdef CONFIG_ATA_NONSTANDARD
47 #include <asm/libata-portmap.h>
49 #include <asm-generic/libata-portmap.h>
53 * compile-time options: to be removed as soon as all the drivers are
54 * converted to the new debugging mechanism
56 #undef ATA_DEBUG /* debugging output */
57 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
58 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
59 #undef ATA_NDEBUG /* define to disable quick runtime checks */
62 /* note: prints function name for you */
64 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
65 #ifdef ATA_VERBOSE_DEBUG
66 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
68 #define VPRINTK(fmt, args...)
69 #endif /* ATA_VERBOSE_DEBUG */
71 #define DPRINTK(fmt, args...)
72 #define VPRINTK(fmt, args...)
73 #endif /* ATA_DEBUG */
75 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
77 #define ata_print_version_once(dev, version) \
79 static bool __print_once; \
81 if (!__print_once) { \
82 __print_once = true; \
83 ata_print_version(dev, version); \
87 /* NEW: debug levels */
88 #define HAVE_LIBATA_MSG 1
92 ATA_MSG_INFO = 0x0002,
93 ATA_MSG_PROBE = 0x0004,
94 ATA_MSG_WARN = 0x0008,
95 ATA_MSG_MALLOC = 0x0010,
97 ATA_MSG_INTR = 0x0040,
101 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
102 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
103 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
104 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
105 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
106 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
107 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
108 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
110 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
112 if (dval < 0 || dval >= (sizeof(u32) * 8))
113 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
116 return (1 << dval) - 1;
119 /* defines only for the constants which don't work well as enums */
120 #define ATA_TAG_POISON 0xfafbfcfdU
123 /* various global constants */
124 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
125 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
127 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
129 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
130 ATA_SHORT_PAUSE = 16,
132 ATAPI_MAX_DRAIN = 16 << 10,
134 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
136 ATA_SHT_EMULATED = 1,
137 ATA_SHT_CMD_PER_LUN = 1,
138 ATA_SHT_THIS_ID = -1,
139 ATA_SHT_USE_CLUSTERING = 1,
141 /* struct ata_device stuff */
142 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
143 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
144 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
145 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
146 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
147 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
148 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
149 ATA_DFLAG_AN = (1 << 7), /* AN configured */
150 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
151 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
153 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
154 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
155 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
156 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
157 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
158 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
159 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
161 ATA_DFLAG_DETACH = (1 << 24),
162 ATA_DFLAG_DETACHED = (1 << 25),
164 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
166 ATA_DEV_UNKNOWN = 0, /* unknown device */
167 ATA_DEV_ATA = 1, /* ATA device */
168 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
169 ATA_DEV_ATAPI = 3, /* ATAPI device */
170 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
171 ATA_DEV_PMP = 5, /* SATA port multiplier */
172 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
173 ATA_DEV_SEMB = 7, /* SEMB */
174 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
175 ATA_DEV_NONE = 9, /* no device */
177 /* struct ata_link flags */
178 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
179 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
180 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
181 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
182 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
183 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
184 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
185 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
186 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
187 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */
189 /* struct ata_port flags */
190 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
191 /* (doesn't imply presence) */
192 ATA_FLAG_SATA = (1 << 1),
193 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
194 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
195 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
196 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
197 * doesn't handle PIO interrupts */
198 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
199 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
200 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
201 ATA_FLAG_DEBUGMSG = (1 << 13),
202 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
203 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
204 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
205 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
206 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
207 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
208 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
210 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
212 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
214 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
217 /* struct ata_port pflags */
218 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
219 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
220 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
221 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
222 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
223 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
224 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
225 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
226 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
227 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
229 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
230 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
231 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
233 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
234 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
236 /* struct ata_queued_cmd flags */
237 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
238 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
239 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
240 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
241 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
242 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
243 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
245 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
246 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
247 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
250 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
251 ATA_HOST_STARTED = (1 << 1), /* Host started */
252 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
253 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */
255 /* bits 24:31 of host->flags are reserved for LLD specific flags */
257 /* various lengths of time */
258 ATA_TMOUT_BOOT = 30000, /* heuristic */
259 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
260 ATA_TMOUT_INTERNAL_QUICK = 5000,
261 ATA_TMOUT_MAX_PARK = 30000,
264 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
265 * is too much without parallel probing. Use 2s if parallel
266 * probing is available, 800ms otherwise.
268 ATA_TMOUT_FF_WAIT_LONG = 2000,
269 ATA_TMOUT_FF_WAIT = 800,
271 /* Spec mandates to wait for ">= 2ms" before checking status
272 * after reset. We wait 150ms, because that was the magic
273 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
274 * the period of time between when the ATA command register is
275 * written, and then status is checked. Because waiting for
276 * "a while" before checking status is fine, post SRST, we
277 * perform this magic delay here as well.
279 * Old drivers/ide uses the 2mS rule and then waits for ready.
281 ATA_WAIT_AFTER_RESET = 150,
283 /* If PMP is supported, we have to do follow-up SRST. As some
284 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
285 * advised to wait only for the following duration before
288 ATA_TMOUT_PMP_SRST_WAIT = 5000,
302 /* SATA port states */
307 /* encoding various smaller bitmaps into a single
308 * unsigned long bitmap
310 ATA_NR_PIO_MODES = 7,
311 ATA_NR_MWDMA_MODES = 5,
312 ATA_NR_UDMA_MODES = 8,
315 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
316 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
318 /* size of buffer to pad xfers ending on unaligned boundaries */
324 /* return values for ->qc_defer */
328 /* desc_len for ata_eh_info and context */
329 ATA_EH_DESC_LEN = 80,
331 /* reset / recovery action types */
332 ATA_EH_REVALIDATE = (1 << 0),
333 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
334 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
335 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
336 ATA_EH_ENABLE_LINK = (1 << 3),
337 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
339 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
340 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
343 /* ata_eh_info->flags */
344 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
345 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
346 ATA_EHI_QUIET = (1 << 3), /* be quiet */
347 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
349 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
350 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
351 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
352 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
353 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
355 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
357 /* mask of flags to transfer *to* the slave link */
358 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
360 /* max tries if error condition is still set after ->error_handler */
361 ATA_EH_MAX_TRIES = 5,
363 /* sometimes resuming a link requires several retries */
364 ATA_LINK_RESUME_TRIES = 5,
366 /* how hard are we gonna try to probe/recover devices */
367 ATA_PROBE_MAX_TRIES = 3,
368 ATA_EH_DEV_TRIES = 3,
369 ATA_EH_PMP_TRIES = 5,
370 ATA_EH_PMP_LINK_TRIES = 3,
372 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
374 /* This should match the actual table size of
375 * ata_eh_cmd_timeout_table in libata-eh.c.
377 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
379 /* Horkage types. May be set by libata or controller on drives
380 (some horkage may be drive/controller pair dependent */
382 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
383 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
384 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
385 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
386 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
387 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
388 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
389 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
390 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
391 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
392 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
393 not multiple of 16 bytes */
394 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
395 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
396 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
397 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
398 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
400 /* DMA mask for user DMA control: User visible values; DO NOT
402 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
403 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
404 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
406 /* ATAPI command types */
407 ATAPI_READ = 0, /* READs */
408 ATAPI_WRITE = 1, /* WRITEs */
409 ATAPI_READ_CD = 2, /* READ CD [MSF] */
410 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
411 ATAPI_MISC = 4, /* the rest */
413 /* Timing constants */
414 ATA_TIMING_SETUP = (1 << 0),
415 ATA_TIMING_ACT8B = (1 << 1),
416 ATA_TIMING_REC8B = (1 << 2),
417 ATA_TIMING_CYC8B = (1 << 3),
418 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
420 ATA_TIMING_ACTIVE = (1 << 4),
421 ATA_TIMING_RECOVER = (1 << 5),
422 ATA_TIMING_DMACK_HOLD = (1 << 6),
423 ATA_TIMING_CYCLE = (1 << 7),
424 ATA_TIMING_UDMA = (1 << 8),
425 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
426 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
427 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
428 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
432 ATA_ACPI_FILTER_SETXFER = 1 << 0,
433 ATA_ACPI_FILTER_LOCK = 1 << 1,
434 ATA_ACPI_FILTER_DIPM = 1 << 2,
435 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
436 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
438 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
439 ATA_ACPI_FILTER_LOCK |
440 ATA_ACPI_FILTER_DIPM,
444 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
446 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
448 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
452 enum hsm_task_states {
453 HSM_ST_IDLE, /* no command on going */
454 HSM_ST_FIRST, /* (waiting the device to)
455 write CDB or first data block */
456 HSM_ST, /* (waiting the device to) transfer data */
457 HSM_ST_LAST, /* (waiting the device to) complete command */
458 HSM_ST_ERR, /* error */
461 enum ata_completion_errors {
462 AC_ERR_DEV = (1 << 0), /* device reported error */
463 AC_ERR_HSM = (1 << 1), /* host state machine violation */
464 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
465 AC_ERR_MEDIA = (1 << 3), /* media error */
466 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
467 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
468 AC_ERR_SYSTEM = (1 << 6), /* system error */
469 AC_ERR_INVALID = (1 << 7), /* invalid argument */
470 AC_ERR_OTHER = (1 << 8), /* unknown */
471 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
472 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
476 * Link power management policy: If you alter this, you also need to
477 * alter libata-scsi.c (for the ascii descriptions)
479 enum ata_lpm_policy {
487 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
488 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
491 /* forward declarations */
493 struct ata_port_operations;
496 struct ata_queued_cmd;
499 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
500 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
501 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
502 unsigned long deadline);
503 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
505 extern struct device_attribute dev_attr_link_power_management_policy;
506 extern struct device_attribute dev_attr_unload_heads;
507 extern struct device_attribute dev_attr_em_message_type;
508 extern struct device_attribute dev_attr_em_message;
509 extern struct device_attribute dev_attr_sw_activity;
517 #ifdef CONFIG_ATA_SFF
519 void __iomem *cmd_addr;
520 void __iomem *data_addr;
521 void __iomem *error_addr;
522 void __iomem *feature_addr;
523 void __iomem *nsect_addr;
524 void __iomem *lbal_addr;
525 void __iomem *lbam_addr;
526 void __iomem *lbah_addr;
527 void __iomem *device_addr;
528 void __iomem *status_addr;
529 void __iomem *command_addr;
530 void __iomem *altstatus_addr;
531 void __iomem *ctl_addr;
532 #ifdef CONFIG_ATA_BMDMA
533 void __iomem *bmdma_addr;
534 #endif /* CONFIG_ATA_BMDMA */
535 void __iomem *scr_addr;
537 #endif /* CONFIG_ATA_SFF */
542 void __iomem * const *iomap;
543 unsigned int n_ports;
545 struct ata_port_operations *ops;
548 struct mutex eh_mutex;
549 struct task_struct *eh_owner;
551 struct ata_port *simplex_claimed; /* channel owning the DMA */
552 struct ata_port *ports[0];
555 struct ata_queued_cmd {
557 struct ata_device *dev;
559 struct scsi_cmnd *scsicmd;
560 void (*scsidone)(struct scsi_cmnd *);
562 struct ata_taskfile tf;
563 u8 cdb[ATAPI_CDB_LEN];
565 unsigned long flags; /* ATA_QCFLAG_xxx */
568 unsigned int orig_n_elem;
572 unsigned int sect_size;
575 unsigned int extrabytes;
576 unsigned int curbytes;
578 struct scatterlist sgent;
580 struct scatterlist *sg;
582 struct scatterlist *cursg;
583 unsigned int cursg_ofs;
585 unsigned int err_mask;
586 struct ata_taskfile result_tf;
587 ata_qc_cb_t complete_fn;
593 struct ata_port_stats {
594 unsigned long unhandled_irq;
595 unsigned long idle_irq;
596 unsigned long rw_reqbuf;
599 struct ata_ering_entry {
601 unsigned int err_mask;
607 struct ata_ering_entry ring[ATA_ERING_SIZE];
611 struct ata_link *link;
612 unsigned int devno; /* 0 or 1 */
613 unsigned int horkage; /* List of broken features */
614 unsigned long flags; /* ATA_DFLAG_xxx */
615 struct scsi_device *sdev; /* attached SCSI device */
617 #ifdef CONFIG_ATA_ACPI
618 union acpi_object *gtf_cache;
619 unsigned int gtf_filter;
622 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
623 u64 n_sectors; /* size of device, if ATA */
624 u64 n_native_sectors; /* native size, if ATA */
625 unsigned int class; /* ATA_DEV_xxx */
626 unsigned long unpark_deadline;
631 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
633 unsigned int multi_count; /* sectors count for
634 READ/WRITE MULTIPLE */
635 unsigned int max_sectors; /* per-device max sectors */
636 unsigned int cdb_len;
638 /* per-dev xfer mask */
639 unsigned long pio_mask;
640 unsigned long mwdma_mask;
641 unsigned long udma_mask;
643 /* for CHS addressing */
644 u16 cylinders; /* Number of cylinders */
645 u16 heads; /* Number of heads */
646 u16 sectors; /* Number of sectors per track */
649 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
650 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
655 /* ering is CLEAR_END, read comment above CLEAR_END */
656 struct ata_ering ering;
659 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
660 * cleared to zero on ata_dev_init().
662 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
663 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
666 struct ata_device *dev; /* offending device */
667 u32 serror; /* SError from LLDD */
668 unsigned int err_mask; /* port-wide err_mask */
669 unsigned int action; /* ATA_EH_* action mask */
670 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
671 unsigned int flags; /* ATA_EHI_* flags */
673 unsigned int probe_mask;
675 char desc[ATA_EH_DESC_LEN];
679 struct ata_eh_context {
680 struct ata_eh_info i;
681 int tries[ATA_MAX_DEVICES];
682 int cmd_timeout_idx[ATA_MAX_DEVICES]
683 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
684 unsigned int classes[ATA_MAX_DEVICES];
685 unsigned int did_probe_mask;
686 unsigned int unloaded_mask;
687 unsigned int saved_ncq_enabled;
688 u8 saved_xfer_mode[ATA_MAX_DEVICES];
689 /* timestamp for the last reset attempt or success */
690 unsigned long last_reset;
693 struct ata_acpi_drive
699 struct ata_acpi_gtm {
700 struct ata_acpi_drive drive[2];
706 int pmp; /* port multiplier port # */
709 unsigned int active_tag; /* active tag on this link */
710 u32 sactive; /* active NCQ commands */
712 unsigned int flags; /* ATA_LFLAG_xxx */
714 u32 saved_scontrol; /* SControl on probe */
715 unsigned int hw_sata_spd_limit;
716 unsigned int sata_spd_limit;
717 unsigned int sata_spd; /* current SATA PHY speed */
718 enum ata_lpm_policy lpm_policy;
720 /* record runtime error info, protected by host_set lock */
721 struct ata_eh_info eh_info;
723 struct ata_eh_context eh_context;
725 struct ata_device device[ATA_MAX_DEVICES];
727 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
728 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
731 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
732 struct ata_port_operations *ops;
734 /* Flags owned by the EH context. Only EH should touch these once the
736 unsigned long flags; /* ATA_FLAG_xxx */
737 /* Flags that change dynamically, protected by ap->lock */
738 unsigned int pflags; /* ATA_PFLAG_xxx */
739 unsigned int print_id; /* user visible unique port ID */
740 unsigned int port_no; /* 0 based port no. inside the host */
742 #ifdef CONFIG_ATA_SFF
743 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
744 u8 ctl; /* cache of ATA control register */
745 u8 last_ctl; /* Cache last written value */
746 struct ata_link* sff_pio_task_link; /* link currently used */
747 struct delayed_work sff_pio_task;
748 #ifdef CONFIG_ATA_BMDMA
749 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
750 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
751 #endif /* CONFIG_ATA_BMDMA */
752 #endif /* CONFIG_ATA_SFF */
754 unsigned int pio_mask;
755 unsigned int mwdma_mask;
756 unsigned int udma_mask;
757 unsigned int cbl; /* cable type; ATA_CBL_xxx */
759 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
760 unsigned long qc_allocated;
761 unsigned int qc_active;
762 int nr_active_links; /* #links with active qcs */
764 struct ata_link link; /* host default link */
765 struct ata_link *slave_link; /* see ata_slave_link_init() */
767 int nr_pmp_links; /* nr of available PMP links */
768 struct ata_link *pmp_link; /* array of PMP links */
769 struct ata_link *excl_link; /* for PMP qc exclusion */
771 struct ata_port_stats stats;
772 struct ata_host *host;
776 struct mutex scsi_scan_mutex;
777 struct delayed_work hotplug_task;
778 struct work_struct scsi_rescan_task;
780 unsigned int hsm_task_state;
783 struct list_head eh_done_q;
784 wait_queue_head_t eh_wait_q;
786 struct completion park_req_pending;
788 pm_message_t pm_mesg;
790 enum ata_lpm_policy target_lpm_policy;
792 struct timer_list fastdrain_timer;
793 unsigned long fastdrain_cnt;
798 #ifdef CONFIG_ATA_ACPI
799 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
802 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
805 /* The following initializer overrides a method to NULL whether one of
806 * its parent has the method defined or not. This is equivalent to
807 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
808 * expression and thus can't be used as an initializer.
810 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
812 struct ata_port_operations {
816 int (*qc_defer)(struct ata_queued_cmd *qc);
817 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
818 void (*qc_prep)(struct ata_queued_cmd *qc);
819 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
820 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
823 * Configuration and exception handling
825 int (*cable_detect)(struct ata_port *ap);
826 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
827 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
828 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
829 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
830 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
832 void (*dev_config)(struct ata_device *dev);
834 void (*freeze)(struct ata_port *ap);
835 void (*thaw)(struct ata_port *ap);
836 ata_prereset_fn_t prereset;
837 ata_reset_fn_t softreset;
838 ata_reset_fn_t hardreset;
839 ata_postreset_fn_t postreset;
840 ata_prereset_fn_t pmp_prereset;
841 ata_reset_fn_t pmp_softreset;
842 ata_reset_fn_t pmp_hardreset;
843 ata_postreset_fn_t pmp_postreset;
844 void (*error_handler)(struct ata_port *ap);
845 void (*lost_interrupt)(struct ata_port *ap);
846 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
847 void (*sched_eh)(struct ata_port *ap);
848 void (*end_eh)(struct ata_port *ap);
853 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
854 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
855 void (*pmp_attach)(struct ata_port *ap);
856 void (*pmp_detach)(struct ata_port *ap);
857 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
861 * Start, stop, suspend and resume
863 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
864 int (*port_resume)(struct ata_port *ap);
865 int (*port_start)(struct ata_port *ap);
866 void (*port_stop)(struct ata_port *ap);
867 void (*host_stop)(struct ata_host *host);
869 #ifdef CONFIG_ATA_SFF
871 * SFF / taskfile oriented ops
873 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
874 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
875 u8 (*sff_check_status)(struct ata_port *ap);
876 u8 (*sff_check_altstatus)(struct ata_port *ap);
877 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
878 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
879 void (*sff_exec_command)(struct ata_port *ap,
880 const struct ata_taskfile *tf);
881 unsigned int (*sff_data_xfer)(struct ata_device *dev,
882 unsigned char *buf, unsigned int buflen, int rw);
883 void (*sff_irq_on)(struct ata_port *);
884 bool (*sff_irq_check)(struct ata_port *);
885 void (*sff_irq_clear)(struct ata_port *);
886 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
888 #ifdef CONFIG_ATA_BMDMA
889 void (*bmdma_setup)(struct ata_queued_cmd *qc);
890 void (*bmdma_start)(struct ata_queued_cmd *qc);
891 void (*bmdma_stop)(struct ata_queued_cmd *qc);
892 u8 (*bmdma_status)(struct ata_port *ap);
893 #endif /* CONFIG_ATA_BMDMA */
894 #endif /* CONFIG_ATA_SFF */
896 ssize_t (*em_show)(struct ata_port *ap, char *buf);
897 ssize_t (*em_store)(struct ata_port *ap, const char *message,
899 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
900 ssize_t (*sw_activity_store)(struct ata_device *dev,
901 enum sw_activity val);
905 void (*phy_reset)(struct ata_port *ap);
906 void (*eng_timeout)(struct ata_port *ap);
909 * ->inherits must be the last field and all the preceding
910 * fields must be pointers.
912 const struct ata_port_operations *inherits;
915 struct ata_port_info {
917 unsigned long link_flags;
918 unsigned long pio_mask;
919 unsigned long mwdma_mask;
920 unsigned long udma_mask;
921 struct ata_port_operations *port_ops;
926 unsigned short mode; /* ATA mode */
927 unsigned short setup; /* t1 */
928 unsigned short act8b; /* t2 for 8-bit I/O */
929 unsigned short rec8b; /* t2i for 8-bit I/O */
930 unsigned short cyc8b; /* t0 for 8-bit I/O */
931 unsigned short active; /* t2 or tD */
932 unsigned short recover; /* t2i or tK */
933 unsigned short dmack_hold; /* tj */
934 unsigned short cycle; /* t0 */
935 unsigned short udma; /* t2CYCTYP/2 */
939 * Core layer - drivers/ata/libata-core.c
941 extern const unsigned long sata_deb_timing_normal[];
942 extern const unsigned long sata_deb_timing_hotplug[];
943 extern const unsigned long sata_deb_timing_long[];
945 extern struct ata_port_operations ata_dummy_port_ops;
946 extern const struct ata_port_info ata_dummy_port_info;
948 static inline const unsigned long *
949 sata_ehc_deb_timing(struct ata_eh_context *ehc)
951 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
952 return sata_deb_timing_hotplug;
954 return sata_deb_timing_normal;
957 static inline int ata_port_is_dummy(struct ata_port *ap)
959 return ap->ops == &ata_dummy_port_ops;
962 extern int sata_set_spd(struct ata_link *link);
963 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
964 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
965 int (*check_ready)(struct ata_link *link));
966 extern int sata_link_debounce(struct ata_link *link,
967 const unsigned long *params, unsigned long deadline);
968 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
969 unsigned long deadline);
970 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
972 extern int sata_link_hardreset(struct ata_link *link,
973 const unsigned long *timing, unsigned long deadline,
974 bool *online, int (*check_ready)(struct ata_link *));
975 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
976 unsigned long deadline);
977 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
979 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
980 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
981 const struct ata_port_info * const * ppi, int n_ports);
982 extern int ata_slave_link_init(struct ata_port *ap);
983 extern int ata_host_start(struct ata_host *host);
984 extern int ata_host_register(struct ata_host *host,
985 struct scsi_host_template *sht);
986 extern int ata_host_activate(struct ata_host *host, int irq,
987 irq_handler_t irq_handler, unsigned long irq_flags,
988 struct scsi_host_template *sht);
989 extern void ata_host_detach(struct ata_host *host);
990 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
991 extern int ata_scsi_detect(struct scsi_host_template *sht);
992 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
993 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
994 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
995 int cmd, void __user *arg);
996 extern void ata_sas_port_destroy(struct ata_port *);
997 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
998 struct ata_port_info *, struct Scsi_Host *);
999 extern void ata_sas_async_probe(struct ata_port *ap);
1000 extern int ata_sas_sync_probe(struct ata_port *ap);
1001 extern int ata_sas_port_init(struct ata_port *);
1002 extern int ata_sas_port_start(struct ata_port *ap);
1003 extern void ata_sas_port_stop(struct ata_port *ap);
1004 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1005 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1006 extern int sata_scr_valid(struct ata_link *link);
1007 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1008 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1009 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1010 extern bool ata_link_online(struct ata_link *link);
1011 extern bool ata_link_offline(struct ata_link *link);
1013 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1014 extern void ata_host_resume(struct ata_host *host);
1015 extern int ata_sas_port_async_suspend(struct ata_port *ap, int *async);
1016 extern int ata_sas_port_async_resume(struct ata_port *ap, int *async);
1018 static inline int ata_sas_port_async_suspend(struct ata_port *ap, int *async)
1022 static inline int ata_sas_port_async_resume(struct ata_port *ap, int *async)
1027 extern int ata_ratelimit(void);
1028 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1029 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1030 u32 val, unsigned long interval, unsigned long timeout);
1031 extern int atapi_cmd_type(u8 opcode);
1032 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1033 u8 pmp, int is_cmd, u8 *fis);
1034 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1035 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1036 unsigned long mwdma_mask, unsigned long udma_mask);
1037 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1038 unsigned long *pio_mask, unsigned long *mwdma_mask,
1039 unsigned long *udma_mask);
1040 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1041 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1042 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1043 extern const char *ata_mode_string(unsigned long xfer_mask);
1044 extern unsigned long ata_id_xfermask(const u16 *id);
1045 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1046 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1047 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1048 unsigned int n_elem);
1049 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1050 extern void ata_dev_disable(struct ata_device *adev);
1051 extern void ata_id_string(const u16 *id, unsigned char *s,
1052 unsigned int ofs, unsigned int len);
1053 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1054 unsigned int ofs, unsigned int len);
1055 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1056 struct ata_taskfile *tf, u16 *id);
1057 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1058 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1059 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1060 extern int ata_std_bios_param(struct scsi_device *sdev,
1061 struct block_device *bdev,
1062 sector_t capacity, int geom[]);
1063 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1064 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1065 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1066 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1067 int queue_depth, int reason);
1068 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1069 int queue_depth, int reason);
1070 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1071 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1072 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1073 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1075 extern int ata_cable_40wire(struct ata_port *ap);
1076 extern int ata_cable_80wire(struct ata_port *ap);
1077 extern int ata_cable_sata(struct ata_port *ap);
1078 extern int ata_cable_ignore(struct ata_port *ap);
1079 extern int ata_cable_unknown(struct ata_port *ap);
1081 /* Timing helpers */
1082 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1083 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1084 extern int ata_timing_compute(struct ata_device *, unsigned short,
1085 struct ata_timing *, int, int);
1086 extern void ata_timing_merge(const struct ata_timing *,
1087 const struct ata_timing *, struct ata_timing *,
1089 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1096 unsigned int reg; /* PCI config register to read */
1097 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1102 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1103 extern void ata_pci_remove_one(struct pci_dev *pdev);
1106 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1107 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1108 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1109 extern int ata_pci_device_resume(struct pci_dev *pdev);
1110 #endif /* CONFIG_PM */
1111 #endif /* CONFIG_PCI */
1114 * ACPI - drivers/ata/libata-acpi.c
1116 #ifdef CONFIG_ATA_ACPI
1117 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1119 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1120 return &ap->__acpi_init_gtm;
1123 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1124 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1125 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1126 const struct ata_acpi_gtm *gtm);
1127 acpi_handle ata_ap_acpi_handle(struct ata_port *ap);
1128 acpi_handle ata_dev_acpi_handle(struct ata_device *dev);
1129 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1131 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1136 static inline int ata_acpi_stm(const struct ata_port *ap,
1137 struct ata_acpi_gtm *stm)
1142 static inline int ata_acpi_gtm(const struct ata_port *ap,
1143 struct ata_acpi_gtm *stm)
1148 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1149 const struct ata_acpi_gtm *gtm)
1154 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1155 const struct ata_acpi_gtm *gtm)
1162 * EH - drivers/ata/libata-eh.c
1164 extern void ata_port_schedule_eh(struct ata_port *ap);
1165 extern void ata_port_wait_eh(struct ata_port *ap);
1166 extern int ata_link_abort(struct ata_link *link);
1167 extern int ata_port_abort(struct ata_port *ap);
1168 extern int ata_port_freeze(struct ata_port *ap);
1169 extern int sata_async_notification(struct ata_port *ap);
1171 extern void ata_eh_freeze_port(struct ata_port *ap);
1172 extern void ata_eh_thaw_port(struct ata_port *ap);
1174 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1175 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1176 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1178 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1179 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1180 ata_postreset_fn_t postreset);
1181 extern void ata_std_error_handler(struct ata_port *ap);
1182 extern void ata_std_sched_eh(struct ata_port *ap);
1183 extern void ata_std_end_eh(struct ata_port *ap);
1184 extern int ata_link_nr_enabled(struct ata_link *link);
1187 * Base operations to inherit from and initializers for sht
1191 * base : Common to all libata drivers.
1192 * sata : SATA controllers w/ native interface.
1193 * pmp : SATA controllers w/ PMP support.
1194 * sff : SFF ATA controllers w/o BMDMA support.
1195 * bmdma : SFF ATA controllers w/ BMDMA support.
1199 * BASE : Common to all libata drivers. The user must set
1200 * sg_tablesize and dma_boundary.
1201 * PIO : SFF ATA controllers w/ only PIO support.
1202 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1203 * dma_boundary are set to BMDMA limits.
1204 * NCQ : SATA controllers supporting NCQ. The user must set
1205 * sg_tablesize, dma_boundary and can_queue.
1207 extern const struct ata_port_operations ata_base_port_ops;
1208 extern const struct ata_port_operations sata_port_ops;
1209 extern struct device_attribute *ata_common_sdev_attrs[];
1211 #define ATA_BASE_SHT(drv_name) \
1212 .module = THIS_MODULE, \
1214 .ioctl = ata_scsi_ioctl, \
1215 .queuecommand = ata_scsi_queuecmd, \
1216 .can_queue = ATA_DEF_QUEUE, \
1217 .this_id = ATA_SHT_THIS_ID, \
1218 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1219 .emulated = ATA_SHT_EMULATED, \
1220 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1221 .proc_name = drv_name, \
1222 .slave_configure = ata_scsi_slave_config, \
1223 .slave_destroy = ata_scsi_slave_destroy, \
1224 .bios_param = ata_std_bios_param, \
1225 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1226 .sdev_attrs = ata_common_sdev_attrs
1228 #define ATA_NCQ_SHT(drv_name) \
1229 ATA_BASE_SHT(drv_name), \
1230 .change_queue_depth = ata_scsi_change_queue_depth
1235 #ifdef CONFIG_SATA_PMP
1236 static inline bool sata_pmp_supported(struct ata_port *ap)
1238 return ap->flags & ATA_FLAG_PMP;
1241 static inline bool sata_pmp_attached(struct ata_port *ap)
1243 return ap->nr_pmp_links != 0;
1246 static inline int ata_is_host_link(const struct ata_link *link)
1248 return link == &link->ap->link || link == link->ap->slave_link;
1250 #else /* CONFIG_SATA_PMP */
1251 static inline bool sata_pmp_supported(struct ata_port *ap)
1256 static inline bool sata_pmp_attached(struct ata_port *ap)
1261 static inline int ata_is_host_link(const struct ata_link *link)
1265 #endif /* CONFIG_SATA_PMP */
1267 static inline int sata_srst_pmp(struct ata_link *link)
1269 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1270 return SATA_PMP_CTRL_PORT;
1278 int ata_port_printk(const struct ata_port *ap, const char *level,
1279 const char *fmt, ...);
1281 int ata_link_printk(const struct ata_link *link, const char *level,
1282 const char *fmt, ...);
1284 int ata_dev_printk(const struct ata_device *dev, const char *level,
1285 const char *fmt, ...);
1287 #define ata_port_err(ap, fmt, ...) \
1288 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1289 #define ata_port_warn(ap, fmt, ...) \
1290 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1291 #define ata_port_notice(ap, fmt, ...) \
1292 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1293 #define ata_port_info(ap, fmt, ...) \
1294 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1295 #define ata_port_dbg(ap, fmt, ...) \
1296 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1298 #define ata_link_err(link, fmt, ...) \
1299 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1300 #define ata_link_warn(link, fmt, ...) \
1301 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1302 #define ata_link_notice(link, fmt, ...) \
1303 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1304 #define ata_link_info(link, fmt, ...) \
1305 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1306 #define ata_link_dbg(link, fmt, ...) \
1307 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1309 #define ata_dev_err(dev, fmt, ...) \
1310 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1311 #define ata_dev_warn(dev, fmt, ...) \
1312 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1313 #define ata_dev_notice(dev, fmt, ...) \
1314 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1315 #define ata_dev_info(dev, fmt, ...) \
1316 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1317 #define ata_dev_dbg(dev, fmt, ...) \
1318 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1320 void ata_print_version(const struct device *dev, const char *version);
1323 * ata_eh_info helpers
1325 extern __printf(2, 3)
1326 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1327 extern __printf(2, 3)
1328 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1329 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1331 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1333 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1334 ehi->flags |= ATA_EHI_HOTPLUGGED;
1335 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1336 ehi->err_mask |= AC_ERR_ATA_BUS;
1340 * port description helpers
1342 extern __printf(2, 3)
1343 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1345 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1349 static inline unsigned int ata_tag_valid(unsigned int tag)
1351 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1354 static inline unsigned int ata_tag_internal(unsigned int tag)
1356 return tag == ATA_TAG_INTERNAL;
1362 static inline unsigned int ata_class_enabled(unsigned int class)
1364 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1365 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1368 static inline unsigned int ata_class_disabled(unsigned int class)
1370 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1371 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1374 static inline unsigned int ata_class_absent(unsigned int class)
1376 return !ata_class_enabled(class) && !ata_class_disabled(class);
1379 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1381 return ata_class_enabled(dev->class);
1384 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1386 return ata_class_disabled(dev->class);
1389 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1391 return ata_class_absent(dev->class);
1397 static inline int ata_link_max_devices(const struct ata_link *link)
1399 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1404 static inline int ata_link_active(struct ata_link *link)
1406 return ata_tag_valid(link->active_tag) || link->sactive;
1412 * ATA_LITER_* constants are used to select link iteration mode and
1413 * ATA_DITER_* device iteration mode.
1415 * For a custom iteration directly using ata_{link|dev}_next(), if
1416 * @link or @dev, respectively, is NULL, the first element is
1417 * returned. @dev and @link can be any valid device or link and the
1418 * next element according to the iteration mode will be returned.
1419 * After the last element, NULL is returned.
1421 enum ata_link_iter_mode {
1422 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1423 * host link. no slave link */
1424 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1425 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1426 * slave link still comes after host link */
1429 enum ata_dev_iter_mode {
1431 ATA_DITER_ENABLED_REVERSE,
1433 ATA_DITER_ALL_REVERSE,
1436 extern struct ata_link *ata_link_next(struct ata_link *link,
1437 struct ata_port *ap,
1438 enum ata_link_iter_mode mode);
1440 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1441 struct ata_link *link,
1442 enum ata_dev_iter_mode mode);
1445 * Shortcut notation for iterations
1447 * ata_for_each_link() iterates over each link of @ap according to
1448 * @mode. @link points to the current link in the loop. @link is
1449 * NULL after loop termination. ata_for_each_dev() works the same way
1450 * except that it iterates over each device of @link.
1452 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1453 * specified when using the following shorthand notations. Only the
1454 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1455 * specified. This not only increases brevity but also makes it
1456 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1458 #define ata_for_each_link(link, ap, mode) \
1459 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1460 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1462 #define ata_for_each_dev(dev, link, mode) \
1463 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1464 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1467 * ata_ncq_enabled - Test whether NCQ is enabled
1468 * @dev: ATA device to test for
1471 * spin_lock_irqsave(host lock)
1474 * 1 if NCQ is enabled for @dev, 0 otherwise.
1476 static inline int ata_ncq_enabled(struct ata_device *dev)
1478 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1479 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1482 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1484 qc->tf.ctl |= ATA_NIEN;
1487 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1490 if (likely(ata_tag_valid(tag)))
1491 return &ap->qcmd[tag];
1495 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1498 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1500 if (unlikely(!qc) || !ap->ops->error_handler)
1503 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1504 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1510 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1512 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1515 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1517 memset(tf, 0, sizeof(*tf));
1519 #ifdef CONFIG_ATA_SFF
1520 tf->ctl = dev->link->ap->ctl;
1522 tf->ctl = ATA_DEVCTL_OBS;
1524 if (dev->devno == 0)
1525 tf->device = ATA_DEVICE_OBS;
1527 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1530 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1532 qc->dma_dir = DMA_NONE;
1537 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1540 qc->sect_size = ATA_SECT_SIZE;
1542 ata_tf_init(qc->dev, &qc->tf);
1544 /* init result_tf such that it indicates normal completion */
1545 qc->result_tf.command = ATA_DRDY;
1546 qc->result_tf.feature = 0;
1549 static inline int ata_try_flush_cache(const struct ata_device *dev)
1551 return ata_id_wcache_enabled(dev->id) ||
1552 ata_id_has_flush(dev->id) ||
1553 ata_id_has_flush_ext(dev->id);
1556 static inline unsigned int ac_err_mask(u8 status)
1558 if (status & (ATA_BUSY | ATA_DRQ))
1560 if (status & (ATA_ERR | ATA_DF))
1565 static inline unsigned int __ac_err_mask(u8 status)
1567 unsigned int mask = ac_err_mask(status);
1569 return AC_ERR_OTHER;
1573 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1575 return *(struct ata_port **)&host->hostdata[0];
1578 static inline int ata_check_ready(u8 status)
1580 if (!(status & ATA_BUSY))
1583 /* 0xff indicates either no device or device not ready */
1590 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1591 unsigned long timeout_msecs)
1593 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1596 /* Don't open code these in drivers as there are traps. Firstly the range may
1597 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1598 > UDMA_0. Dyma ddreigiau */
1600 static inline int ata_using_mwdma(struct ata_device *adev)
1602 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1607 static inline int ata_using_udma(struct ata_device *adev)
1609 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1614 static inline int ata_dma_enabled(struct ata_device *adev)
1616 return (adev->dma_mode == 0xFF ? 0 : 1);
1619 /**************************************************************************
1620 * PMP - drivers/ata/libata-pmp.c
1622 #ifdef CONFIG_SATA_PMP
1624 extern const struct ata_port_operations sata_pmp_port_ops;
1626 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1627 extern void sata_pmp_error_handler(struct ata_port *ap);
1629 #else /* CONFIG_SATA_PMP */
1631 #define sata_pmp_port_ops sata_port_ops
1632 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1633 #define sata_pmp_error_handler ata_std_error_handler
1635 #endif /* CONFIG_SATA_PMP */
1638 /**************************************************************************
1639 * SFF - drivers/ata/libata-sff.c
1641 #ifdef CONFIG_ATA_SFF
1643 extern const struct ata_port_operations ata_sff_port_ops;
1644 extern const struct ata_port_operations ata_bmdma32_port_ops;
1646 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1647 #define ATA_PIO_SHT(drv_name) \
1648 ATA_BASE_SHT(drv_name), \
1649 .sg_tablesize = LIBATA_MAX_PRD, \
1650 .dma_boundary = ATA_DMA_BOUNDARY
1652 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1653 extern u8 ata_sff_check_status(struct ata_port *ap);
1654 extern void ata_sff_pause(struct ata_port *ap);
1655 extern void ata_sff_dma_pause(struct ata_port *ap);
1656 extern int ata_sff_busy_sleep(struct ata_port *ap,
1657 unsigned long timeout_pat, unsigned long timeout);
1658 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1659 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1660 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1661 extern void ata_sff_exec_command(struct ata_port *ap,
1662 const struct ata_taskfile *tf);
1663 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1664 unsigned char *buf, unsigned int buflen, int rw);
1665 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1666 unsigned char *buf, unsigned int buflen, int rw);
1667 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1668 unsigned char *buf, unsigned int buflen, int rw);
1669 extern void ata_sff_irq_on(struct ata_port *ap);
1670 extern void ata_sff_irq_clear(struct ata_port *ap);
1671 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1672 u8 status, int in_wq);
1673 extern void ata_sff_queue_work(struct work_struct *work);
1674 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1675 unsigned long delay);
1676 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1677 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1678 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1679 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1680 struct ata_queued_cmd *qc);
1681 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1682 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1683 extern void ata_sff_freeze(struct ata_port *ap);
1684 extern void ata_sff_thaw(struct ata_port *ap);
1685 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1686 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1688 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1689 unsigned long deadline);
1690 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1691 unsigned long deadline);
1692 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1693 unsigned long deadline);
1694 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1695 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1696 extern void ata_sff_error_handler(struct ata_port *ap);
1697 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1699 extern int ata_pci_sff_init_host(struct ata_host *host);
1700 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1701 const struct ata_port_info * const * ppi,
1702 struct ata_host **r_host);
1703 extern int ata_pci_sff_activate_host(struct ata_host *host,
1704 irq_handler_t irq_handler,
1705 struct scsi_host_template *sht);
1706 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1707 const struct ata_port_info * const * ppi,
1708 struct scsi_host_template *sht, void *host_priv, int hflags);
1709 #endif /* CONFIG_PCI */
1711 #ifdef CONFIG_ATA_BMDMA
1713 extern const struct ata_port_operations ata_bmdma_port_ops;
1715 #define ATA_BMDMA_SHT(drv_name) \
1716 ATA_BASE_SHT(drv_name), \
1717 .sg_tablesize = LIBATA_MAX_PRD, \
1718 .dma_boundary = ATA_DMA_BOUNDARY
1720 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1721 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1722 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1723 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1724 struct ata_queued_cmd *qc);
1725 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1726 extern void ata_bmdma_error_handler(struct ata_port *ap);
1727 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1728 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1729 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1730 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1731 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1732 extern u8 ata_bmdma_status(struct ata_port *ap);
1733 extern int ata_bmdma_port_start(struct ata_port *ap);
1734 extern int ata_bmdma_port_start32(struct ata_port *ap);
1737 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1738 extern void ata_pci_bmdma_init(struct ata_host *host);
1739 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1740 const struct ata_port_info * const * ppi,
1741 struct ata_host **r_host);
1742 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1743 const struct ata_port_info * const * ppi,
1744 struct scsi_host_template *sht,
1745 void *host_priv, int hflags);
1746 #endif /* CONFIG_PCI */
1747 #endif /* CONFIG_ATA_BMDMA */
1750 * ata_sff_busy_wait - Wait for a port status register
1751 * @ap: Port to wait for.
1752 * @bits: bits that must be clear
1753 * @max: number of 10uS waits to perform
1755 * Waits up to max*10 microseconds for the selected bits in the port's
1756 * status register to be cleared.
1757 * Returns final value of status register.
1760 * Inherited from caller.
1762 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1769 status = ap->ops->sff_check_status(ap);
1771 } while (status != 0xff && (status & bits) && (max > 0));
1777 * ata_wait_idle - Wait for a port to be idle.
1778 * @ap: Port to wait for.
1780 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1781 * Returns final value of status register.
1784 * Inherited from caller.
1786 static inline u8 ata_wait_idle(struct ata_port *ap)
1788 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1791 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1792 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1798 #endif /* CONFIG_ATA_SFF */
1800 #endif /* __LINUX_LIBATA_H__ */