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_DEV_UNKNOWN = 0, /* unknown device */
165 ATA_DEV_ATA = 1, /* ATA device */
166 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
167 ATA_DEV_ATAPI = 3, /* ATAPI device */
168 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
169 ATA_DEV_PMP = 5, /* SATA port multiplier */
170 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
171 ATA_DEV_SEMB = 7, /* SEMB */
172 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
173 ATA_DEV_NONE = 9, /* no device */
175 /* struct ata_link flags */
176 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
177 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
178 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
179 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
180 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
181 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
182 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
183 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
184 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
185 ATA_LFLAG_CHANGED = (1 << 10), /* LPM state changed on this link */
187 /* struct ata_port flags */
188 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
189 /* (doesn't imply presence) */
190 ATA_FLAG_SATA = (1 << 1),
191 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
192 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
193 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
194 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
195 * doesn't handle PIO interrupts */
196 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
197 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
198 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
199 ATA_FLAG_DEBUGMSG = (1 << 13),
200 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
201 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
202 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
203 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
204 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
205 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
206 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
208 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
210 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
211 ATA_FLAG_LOWTAG = (1 << 24), /* host wants lowest available tag */
213 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
216 /* struct ata_port pflags */
217 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
218 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
219 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
220 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
221 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
222 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
223 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
224 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
225 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
226 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
228 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
229 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
230 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
232 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
233 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
235 /* struct ata_queued_cmd flags */
236 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
237 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
238 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
239 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
240 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
241 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
242 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
244 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
245 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
246 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
249 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
250 ATA_HOST_STARTED = (1 << 1), /* Host started */
251 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
253 /* bits 24:31 of host->flags are reserved for LLD specific flags */
255 /* various lengths of time */
256 ATA_TMOUT_BOOT = 30000, /* heuristic */
257 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
258 ATA_TMOUT_INTERNAL_QUICK = 5000,
259 ATA_TMOUT_MAX_PARK = 30000,
262 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
263 * is too much without parallel probing. Use 2s if parallel
264 * probing is available, 800ms otherwise.
266 ATA_TMOUT_FF_WAIT_LONG = 2000,
267 ATA_TMOUT_FF_WAIT = 800,
269 /* Spec mandates to wait for ">= 2ms" before checking status
270 * after reset. We wait 150ms, because that was the magic
271 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
272 * the period of time between when the ATA command register is
273 * written, and then status is checked. Because waiting for
274 * "a while" before checking status is fine, post SRST, we
275 * perform this magic delay here as well.
277 * Old drivers/ide uses the 2mS rule and then waits for ready.
279 ATA_WAIT_AFTER_RESET = 150,
281 /* If PMP is supported, we have to do follow-up SRST. As some
282 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
283 * advised to wait only for the following duration before
286 ATA_TMOUT_PMP_SRST_WAIT = 5000,
288 /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
289 * be a spurious PHY event, so ignore the first PHY event that
290 * occurs within 10s after the policy change.
292 ATA_TMOUT_SPURIOUS_PHY = 10000,
306 /* SATA port states */
311 /* encoding various smaller bitmaps into a single
312 * unsigned long bitmap
314 ATA_NR_PIO_MODES = 7,
315 ATA_NR_MWDMA_MODES = 5,
316 ATA_NR_UDMA_MODES = 8,
319 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
320 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
322 /* size of buffer to pad xfers ending on unaligned boundaries */
328 /* return values for ->qc_defer */
332 /* desc_len for ata_eh_info and context */
333 ATA_EH_DESC_LEN = 80,
335 /* reset / recovery action types */
336 ATA_EH_REVALIDATE = (1 << 0),
337 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
338 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
339 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
340 ATA_EH_ENABLE_LINK = (1 << 3),
341 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
343 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
344 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
347 /* ata_eh_info->flags */
348 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
349 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
350 ATA_EHI_QUIET = (1 << 3), /* be quiet */
351 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
353 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
354 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
355 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
356 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
357 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
359 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
361 /* mask of flags to transfer *to* the slave link */
362 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
364 /* max tries if error condition is still set after ->error_handler */
365 ATA_EH_MAX_TRIES = 5,
367 /* sometimes resuming a link requires several retries */
368 ATA_LINK_RESUME_TRIES = 5,
370 /* how hard are we gonna try to probe/recover devices */
371 ATA_PROBE_MAX_TRIES = 3,
372 ATA_EH_DEV_TRIES = 3,
373 ATA_EH_PMP_TRIES = 5,
374 ATA_EH_PMP_LINK_TRIES = 3,
376 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
378 /* This should match the actual table size of
379 * ata_eh_cmd_timeout_table in libata-eh.c.
381 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
383 /* Horkage types. May be set by libata or controller on drives
384 (some horkage may be drive/controller pair dependent */
386 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
387 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
388 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
389 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
390 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
391 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
392 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
393 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
394 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
395 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
396 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
397 not multiple of 16 bytes */
398 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
399 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
400 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
401 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
402 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
403 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */
404 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
405 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
407 /* DMA mask for user DMA control: User visible values; DO NOT
409 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
410 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
411 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
413 /* ATAPI command types */
414 ATAPI_READ = 0, /* READs */
415 ATAPI_WRITE = 1, /* WRITEs */
416 ATAPI_READ_CD = 2, /* READ CD [MSF] */
417 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
418 ATAPI_MISC = 4, /* the rest */
420 /* Timing constants */
421 ATA_TIMING_SETUP = (1 << 0),
422 ATA_TIMING_ACT8B = (1 << 1),
423 ATA_TIMING_REC8B = (1 << 2),
424 ATA_TIMING_CYC8B = (1 << 3),
425 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
427 ATA_TIMING_ACTIVE = (1 << 4),
428 ATA_TIMING_RECOVER = (1 << 5),
429 ATA_TIMING_DMACK_HOLD = (1 << 6),
430 ATA_TIMING_CYCLE = (1 << 7),
431 ATA_TIMING_UDMA = (1 << 8),
432 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
433 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
434 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
435 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
439 ATA_ACPI_FILTER_SETXFER = 1 << 0,
440 ATA_ACPI_FILTER_LOCK = 1 << 1,
441 ATA_ACPI_FILTER_DIPM = 1 << 2,
442 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
443 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
445 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
446 ATA_ACPI_FILTER_LOCK |
447 ATA_ACPI_FILTER_DIPM,
451 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
453 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
455 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
459 enum hsm_task_states {
460 HSM_ST_IDLE, /* no command on going */
461 HSM_ST_FIRST, /* (waiting the device to)
462 write CDB or first data block */
463 HSM_ST, /* (waiting the device to) transfer data */
464 HSM_ST_LAST, /* (waiting the device to) complete command */
465 HSM_ST_ERR, /* error */
468 enum ata_completion_errors {
469 AC_ERR_DEV = (1 << 0), /* device reported error */
470 AC_ERR_HSM = (1 << 1), /* host state machine violation */
471 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
472 AC_ERR_MEDIA = (1 << 3), /* media error */
473 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
474 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
475 AC_ERR_SYSTEM = (1 << 6), /* system error */
476 AC_ERR_INVALID = (1 << 7), /* invalid argument */
477 AC_ERR_OTHER = (1 << 8), /* unknown */
478 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
479 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
483 * Link power management policy: If you alter this, you also need to
484 * alter libata-scsi.c (for the ascii descriptions)
486 enum ata_lpm_policy {
494 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
495 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
498 /* forward declarations */
500 struct ata_port_operations;
503 struct ata_queued_cmd;
506 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
507 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
508 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
509 unsigned long deadline);
510 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
512 extern struct device_attribute dev_attr_link_power_management_policy;
513 extern struct device_attribute dev_attr_unload_heads;
514 extern struct device_attribute dev_attr_em_message_type;
515 extern struct device_attribute dev_attr_em_message;
516 extern struct device_attribute dev_attr_sw_activity;
524 #ifdef CONFIG_ATA_SFF
526 void __iomem *cmd_addr;
527 void __iomem *data_addr;
528 void __iomem *error_addr;
529 void __iomem *feature_addr;
530 void __iomem *nsect_addr;
531 void __iomem *lbal_addr;
532 void __iomem *lbam_addr;
533 void __iomem *lbah_addr;
534 void __iomem *device_addr;
535 void __iomem *status_addr;
536 void __iomem *command_addr;
537 void __iomem *altstatus_addr;
538 void __iomem *ctl_addr;
539 #ifdef CONFIG_ATA_BMDMA
540 void __iomem *bmdma_addr;
541 #endif /* CONFIG_ATA_BMDMA */
542 void __iomem *scr_addr;
544 #endif /* CONFIG_ATA_SFF */
549 void __iomem * const *iomap;
550 unsigned int n_ports;
551 unsigned int n_tags; /* nr of NCQ tags */
553 struct ata_port_operations *ops;
556 struct mutex eh_mutex;
557 struct task_struct *eh_owner;
559 #ifdef CONFIG_ATA_ACPI
560 acpi_handle acpi_handle;
562 struct ata_port *simplex_claimed; /* channel owning the DMA */
563 struct ata_port *ports[0];
566 struct ata_queued_cmd {
568 struct ata_device *dev;
570 struct scsi_cmnd *scsicmd;
571 void (*scsidone)(struct scsi_cmnd *);
573 struct ata_taskfile tf;
574 u8 cdb[ATAPI_CDB_LEN];
576 unsigned long flags; /* ATA_QCFLAG_xxx */
579 unsigned int orig_n_elem;
583 unsigned int sect_size;
586 unsigned int extrabytes;
587 unsigned int curbytes;
589 struct scatterlist sgent;
591 struct scatterlist *sg;
593 struct scatterlist *cursg;
594 unsigned int cursg_ofs;
596 unsigned int err_mask;
597 struct ata_taskfile result_tf;
598 ata_qc_cb_t complete_fn;
604 struct ata_port_stats {
605 unsigned long unhandled_irq;
606 unsigned long idle_irq;
607 unsigned long rw_reqbuf;
610 struct ata_ering_entry {
612 unsigned int err_mask;
618 struct ata_ering_entry ring[ATA_ERING_SIZE];
622 struct ata_link *link;
623 unsigned int devno; /* 0 or 1 */
624 unsigned int horkage; /* List of broken features */
625 unsigned long flags; /* ATA_DFLAG_xxx */
626 struct scsi_device *sdev; /* attached SCSI device */
628 #ifdef CONFIG_ATA_ACPI
629 acpi_handle acpi_handle;
630 union acpi_object *gtf_cache;
631 unsigned int gtf_filter;
634 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
635 u64 n_sectors; /* size of device, if ATA */
636 u64 n_native_sectors; /* native size, if ATA */
637 unsigned int class; /* ATA_DEV_xxx */
638 unsigned long unpark_deadline;
643 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
645 unsigned int multi_count; /* sectors count for
646 READ/WRITE MULTIPLE */
647 unsigned int max_sectors; /* per-device max sectors */
648 unsigned int cdb_len;
650 /* per-dev xfer mask */
651 unsigned long pio_mask;
652 unsigned long mwdma_mask;
653 unsigned long udma_mask;
655 /* for CHS addressing */
656 u16 cylinders; /* Number of cylinders */
657 u16 heads; /* Number of heads */
658 u16 sectors; /* Number of sectors per track */
661 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
662 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
667 /* ering is CLEAR_END, read comment above CLEAR_END */
668 struct ata_ering ering;
671 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
672 * cleared to zero on ata_dev_init().
674 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
675 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
678 struct ata_device *dev; /* offending device */
679 u32 serror; /* SError from LLDD */
680 unsigned int err_mask; /* port-wide err_mask */
681 unsigned int action; /* ATA_EH_* action mask */
682 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
683 unsigned int flags; /* ATA_EHI_* flags */
685 unsigned int probe_mask;
687 char desc[ATA_EH_DESC_LEN];
691 struct ata_eh_context {
692 struct ata_eh_info i;
693 int tries[ATA_MAX_DEVICES];
694 int cmd_timeout_idx[ATA_MAX_DEVICES]
695 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
696 unsigned int classes[ATA_MAX_DEVICES];
697 unsigned int did_probe_mask;
698 unsigned int unloaded_mask;
699 unsigned int saved_ncq_enabled;
700 u8 saved_xfer_mode[ATA_MAX_DEVICES];
701 /* timestamp for the last reset attempt or success */
702 unsigned long last_reset;
705 struct ata_acpi_drive
711 struct ata_acpi_gtm {
712 struct ata_acpi_drive drive[2];
718 int pmp; /* port multiplier port # */
721 unsigned int active_tag; /* active tag on this link */
722 u32 sactive; /* active NCQ commands */
724 unsigned int flags; /* ATA_LFLAG_xxx */
726 u32 saved_scontrol; /* SControl on probe */
727 unsigned int hw_sata_spd_limit;
728 unsigned int sata_spd_limit;
729 unsigned int sata_spd; /* current SATA PHY speed */
730 enum ata_lpm_policy lpm_policy;
732 /* record runtime error info, protected by host_set lock */
733 struct ata_eh_info eh_info;
735 struct ata_eh_context eh_context;
737 struct ata_device device[ATA_MAX_DEVICES];
739 unsigned long last_lpm_change; /* when last LPM change happened */
741 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
742 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
745 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
746 struct ata_port_operations *ops;
748 /* Flags owned by the EH context. Only EH should touch these once the
750 unsigned long flags; /* ATA_FLAG_xxx */
751 /* Flags that change dynamically, protected by ap->lock */
752 unsigned int pflags; /* ATA_PFLAG_xxx */
753 unsigned int print_id; /* user visible unique port ID */
754 unsigned int port_no; /* 0 based port no. inside the host */
756 #ifdef CONFIG_ATA_SFF
757 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
758 u8 ctl; /* cache of ATA control register */
759 u8 last_ctl; /* Cache last written value */
760 struct ata_link* sff_pio_task_link; /* link currently used */
761 struct delayed_work sff_pio_task;
762 #ifdef CONFIG_ATA_BMDMA
763 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
764 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
765 #endif /* CONFIG_ATA_BMDMA */
766 #endif /* CONFIG_ATA_SFF */
768 unsigned int pio_mask;
769 unsigned int mwdma_mask;
770 unsigned int udma_mask;
771 unsigned int cbl; /* cable type; ATA_CBL_xxx */
773 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
774 unsigned long qc_allocated;
775 unsigned int qc_active;
776 int nr_active_links; /* #links with active qcs */
777 unsigned int last_tag; /* track next tag hw expects */
779 struct ata_link link; /* host default link */
780 struct ata_link *slave_link; /* see ata_slave_link_init() */
782 int nr_pmp_links; /* nr of available PMP links */
783 struct ata_link *pmp_link; /* array of PMP links */
784 struct ata_link *excl_link; /* for PMP qc exclusion */
786 struct ata_port_stats stats;
787 struct ata_host *host;
791 struct mutex scsi_scan_mutex;
792 struct delayed_work hotplug_task;
793 struct work_struct scsi_rescan_task;
795 unsigned int hsm_task_state;
798 struct list_head eh_done_q;
799 wait_queue_head_t eh_wait_q;
801 struct completion park_req_pending;
803 pm_message_t pm_mesg;
805 enum ata_lpm_policy target_lpm_policy;
807 struct timer_list fastdrain_timer;
808 unsigned long fastdrain_cnt;
813 #ifdef CONFIG_ATA_ACPI
814 acpi_handle acpi_handle;
815 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
818 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
821 /* The following initializer overrides a method to NULL whether one of
822 * its parent has the method defined or not. This is equivalent to
823 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
824 * expression and thus can't be used as an initializer.
826 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
828 struct ata_port_operations {
832 int (*qc_defer)(struct ata_queued_cmd *qc);
833 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
834 void (*qc_prep)(struct ata_queued_cmd *qc);
835 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
836 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
839 * Configuration and exception handling
841 int (*cable_detect)(struct ata_port *ap);
842 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
843 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
844 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
845 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
846 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
848 void (*dev_config)(struct ata_device *dev);
850 void (*freeze)(struct ata_port *ap);
851 void (*thaw)(struct ata_port *ap);
852 ata_prereset_fn_t prereset;
853 ata_reset_fn_t softreset;
854 ata_reset_fn_t hardreset;
855 ata_postreset_fn_t postreset;
856 ata_prereset_fn_t pmp_prereset;
857 ata_reset_fn_t pmp_softreset;
858 ata_reset_fn_t pmp_hardreset;
859 ata_postreset_fn_t pmp_postreset;
860 void (*error_handler)(struct ata_port *ap);
861 void (*lost_interrupt)(struct ata_port *ap);
862 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
867 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
868 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
869 void (*pmp_attach)(struct ata_port *ap);
870 void (*pmp_detach)(struct ata_port *ap);
871 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
875 * Start, stop, suspend and resume
877 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
878 int (*port_resume)(struct ata_port *ap);
879 int (*port_start)(struct ata_port *ap);
880 void (*port_stop)(struct ata_port *ap);
881 void (*host_stop)(struct ata_host *host);
883 #ifdef CONFIG_ATA_SFF
885 * SFF / taskfile oriented ops
887 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
888 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
889 u8 (*sff_check_status)(struct ata_port *ap);
890 u8 (*sff_check_altstatus)(struct ata_port *ap);
891 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
892 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
893 void (*sff_exec_command)(struct ata_port *ap,
894 const struct ata_taskfile *tf);
895 unsigned int (*sff_data_xfer)(struct ata_device *dev,
896 unsigned char *buf, unsigned int buflen, int rw);
897 void (*sff_irq_on)(struct ata_port *);
898 bool (*sff_irq_check)(struct ata_port *);
899 void (*sff_irq_clear)(struct ata_port *);
900 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
902 #ifdef CONFIG_ATA_BMDMA
903 void (*bmdma_setup)(struct ata_queued_cmd *qc);
904 void (*bmdma_start)(struct ata_queued_cmd *qc);
905 void (*bmdma_stop)(struct ata_queued_cmd *qc);
906 u8 (*bmdma_status)(struct ata_port *ap);
907 #endif /* CONFIG_ATA_BMDMA */
908 #endif /* CONFIG_ATA_SFF */
910 ssize_t (*em_show)(struct ata_port *ap, char *buf);
911 ssize_t (*em_store)(struct ata_port *ap, const char *message,
913 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
914 ssize_t (*sw_activity_store)(struct ata_device *dev,
915 enum sw_activity val);
919 void (*phy_reset)(struct ata_port *ap);
920 void (*eng_timeout)(struct ata_port *ap);
923 * ->inherits must be the last field and all the preceding
924 * fields must be pointers.
926 const struct ata_port_operations *inherits;
929 struct ata_port_info {
931 unsigned long link_flags;
932 unsigned long pio_mask;
933 unsigned long mwdma_mask;
934 unsigned long udma_mask;
935 struct ata_port_operations *port_ops;
940 unsigned short mode; /* ATA mode */
941 unsigned short setup; /* t1 */
942 unsigned short act8b; /* t2 for 8-bit I/O */
943 unsigned short rec8b; /* t2i for 8-bit I/O */
944 unsigned short cyc8b; /* t0 for 8-bit I/O */
945 unsigned short active; /* t2 or tD */
946 unsigned short recover; /* t2i or tK */
947 unsigned short dmack_hold; /* tj */
948 unsigned short cycle; /* t0 */
949 unsigned short udma; /* t2CYCTYP/2 */
953 * Core layer - drivers/ata/libata-core.c
955 extern const unsigned long sata_deb_timing_normal[];
956 extern const unsigned long sata_deb_timing_hotplug[];
957 extern const unsigned long sata_deb_timing_long[];
959 extern struct ata_port_operations ata_dummy_port_ops;
960 extern const struct ata_port_info ata_dummy_port_info;
962 static inline const unsigned long *
963 sata_ehc_deb_timing(struct ata_eh_context *ehc)
965 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
966 return sata_deb_timing_hotplug;
968 return sata_deb_timing_normal;
971 static inline int ata_port_is_dummy(struct ata_port *ap)
973 return ap->ops == &ata_dummy_port_ops;
976 extern int sata_set_spd(struct ata_link *link);
977 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
978 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
979 int (*check_ready)(struct ata_link *link));
980 extern int sata_link_debounce(struct ata_link *link,
981 const unsigned long *params, unsigned long deadline);
982 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
983 unsigned long deadline);
984 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
986 extern int sata_link_hardreset(struct ata_link *link,
987 const unsigned long *timing, unsigned long deadline,
988 bool *online, int (*check_ready)(struct ata_link *));
989 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
990 unsigned long deadline);
991 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
993 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
994 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
995 const struct ata_port_info * const * ppi, int n_ports);
996 extern int ata_slave_link_init(struct ata_port *ap);
997 extern int ata_host_start(struct ata_host *host);
998 extern int ata_host_register(struct ata_host *host,
999 struct scsi_host_template *sht);
1000 extern int ata_host_activate(struct ata_host *host, int irq,
1001 irq_handler_t irq_handler, unsigned long irq_flags,
1002 struct scsi_host_template *sht);
1003 extern void ata_host_detach(struct ata_host *host);
1004 extern void ata_host_init(struct ata_host *, struct device *,
1005 unsigned long, struct ata_port_operations *);
1006 extern int ata_scsi_detect(struct scsi_host_template *sht);
1007 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
1008 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1009 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1010 int cmd, void __user *arg);
1011 extern void ata_sas_port_destroy(struct ata_port *);
1012 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1013 struct ata_port_info *, struct Scsi_Host *);
1014 extern int ata_sas_port_init(struct ata_port *);
1015 extern int ata_sas_port_start(struct ata_port *ap);
1016 extern void ata_sas_port_stop(struct ata_port *ap);
1017 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1018 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1019 extern int sata_scr_valid(struct ata_link *link);
1020 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1021 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1022 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1023 extern bool ata_link_online(struct ata_link *link);
1024 extern bool ata_link_offline(struct ata_link *link);
1026 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1027 extern void ata_host_resume(struct ata_host *host);
1029 extern int ata_ratelimit(void);
1030 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1031 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1032 u32 val, unsigned long interval, unsigned long timeout);
1033 extern int atapi_cmd_type(u8 opcode);
1034 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1035 u8 pmp, int is_cmd, u8 *fis);
1036 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1037 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1038 unsigned long mwdma_mask, unsigned long udma_mask);
1039 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1040 unsigned long *pio_mask, unsigned long *mwdma_mask,
1041 unsigned long *udma_mask);
1042 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1043 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1044 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1045 extern const char *ata_mode_string(unsigned long xfer_mask);
1046 extern unsigned long ata_id_xfermask(const u16 *id);
1047 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1048 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1049 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1050 unsigned int n_elem);
1051 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1052 extern void ata_dev_disable(struct ata_device *adev);
1053 extern void ata_id_string(const u16 *id, unsigned char *s,
1054 unsigned int ofs, unsigned int len);
1055 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1056 unsigned int ofs, unsigned int len);
1057 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1058 struct ata_taskfile *tf, u16 *id);
1059 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1060 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1061 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1062 extern int ata_std_bios_param(struct scsi_device *sdev,
1063 struct block_device *bdev,
1064 sector_t capacity, int geom[]);
1065 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1066 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1067 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1068 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1069 int queue_depth, int reason);
1070 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1071 int queue_depth, int reason);
1072 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1073 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1074 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1075 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1076 extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
1078 extern int ata_cable_40wire(struct ata_port *ap);
1079 extern int ata_cable_80wire(struct ata_port *ap);
1080 extern int ata_cable_sata(struct ata_port *ap);
1081 extern int ata_cable_ignore(struct ata_port *ap);
1082 extern int ata_cable_unknown(struct ata_port *ap);
1084 /* Timing helpers */
1085 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1086 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1087 extern int ata_timing_compute(struct ata_device *, unsigned short,
1088 struct ata_timing *, int, int);
1089 extern void ata_timing_merge(const struct ata_timing *,
1090 const struct ata_timing *, struct ata_timing *,
1092 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1099 unsigned int reg; /* PCI config register to read */
1100 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1105 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1106 extern void ata_pci_remove_one(struct pci_dev *pdev);
1109 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1110 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1111 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1112 extern int ata_pci_device_resume(struct pci_dev *pdev);
1113 #endif /* CONFIG_PM */
1114 #endif /* CONFIG_PCI */
1117 * ACPI - drivers/ata/libata-acpi.c
1119 #ifdef CONFIG_ATA_ACPI
1120 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1122 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1123 return &ap->__acpi_init_gtm;
1126 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1127 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1128 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1129 const struct ata_acpi_gtm *gtm);
1130 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1132 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1137 static inline int ata_acpi_stm(const struct ata_port *ap,
1138 struct ata_acpi_gtm *stm)
1143 static inline int ata_acpi_gtm(const struct ata_port *ap,
1144 struct ata_acpi_gtm *stm)
1149 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1150 const struct ata_acpi_gtm *gtm)
1155 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1156 const struct ata_acpi_gtm *gtm)
1163 * EH - drivers/ata/libata-eh.c
1165 extern void ata_port_schedule_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 int ata_link_nr_enabled(struct ata_link *link);
1185 * Base operations to inherit from and initializers for sht
1189 * base : Common to all libata drivers.
1190 * sata : SATA controllers w/ native interface.
1191 * pmp : SATA controllers w/ PMP support.
1192 * sff : SFF ATA controllers w/o BMDMA support.
1193 * bmdma : SFF ATA controllers w/ BMDMA support.
1197 * BASE : Common to all libata drivers. The user must set
1198 * sg_tablesize and dma_boundary.
1199 * PIO : SFF ATA controllers w/ only PIO support.
1200 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1201 * dma_boundary are set to BMDMA limits.
1202 * NCQ : SATA controllers supporting NCQ. The user must set
1203 * sg_tablesize, dma_boundary and can_queue.
1205 extern const struct ata_port_operations ata_base_port_ops;
1206 extern const struct ata_port_operations sata_port_ops;
1207 extern struct device_attribute *ata_common_sdev_attrs[];
1209 #define ATA_BASE_SHT(drv_name) \
1210 .module = THIS_MODULE, \
1212 .ioctl = ata_scsi_ioctl, \
1213 .queuecommand = ata_scsi_queuecmd, \
1214 .can_queue = ATA_DEF_QUEUE, \
1215 .this_id = ATA_SHT_THIS_ID, \
1216 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1217 .emulated = ATA_SHT_EMULATED, \
1218 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1219 .proc_name = drv_name, \
1220 .slave_configure = ata_scsi_slave_config, \
1221 .slave_destroy = ata_scsi_slave_destroy, \
1222 .bios_param = ata_std_bios_param, \
1223 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1224 .sdev_attrs = ata_common_sdev_attrs
1226 #define ATA_NCQ_SHT(drv_name) \
1227 ATA_BASE_SHT(drv_name), \
1228 .change_queue_depth = ata_scsi_change_queue_depth
1233 #ifdef CONFIG_SATA_PMP
1234 static inline bool sata_pmp_supported(struct ata_port *ap)
1236 return ap->flags & ATA_FLAG_PMP;
1239 static inline bool sata_pmp_attached(struct ata_port *ap)
1241 return ap->nr_pmp_links != 0;
1244 static inline int ata_is_host_link(const struct ata_link *link)
1246 return link == &link->ap->link || link == link->ap->slave_link;
1248 #else /* CONFIG_SATA_PMP */
1249 static inline bool sata_pmp_supported(struct ata_port *ap)
1254 static inline bool sata_pmp_attached(struct ata_port *ap)
1259 static inline int ata_is_host_link(const struct ata_link *link)
1263 #endif /* CONFIG_SATA_PMP */
1265 static inline int sata_srst_pmp(struct ata_link *link)
1267 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1268 return SATA_PMP_CTRL_PORT;
1276 int ata_port_printk(const struct ata_port *ap, const char *level,
1277 const char *fmt, ...);
1279 int ata_link_printk(const struct ata_link *link, const char *level,
1280 const char *fmt, ...);
1282 int ata_dev_printk(const struct ata_device *dev, const char *level,
1283 const char *fmt, ...);
1285 #define ata_port_err(ap, fmt, ...) \
1286 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1287 #define ata_port_warn(ap, fmt, ...) \
1288 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1289 #define ata_port_notice(ap, fmt, ...) \
1290 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1291 #define ata_port_info(ap, fmt, ...) \
1292 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1293 #define ata_port_dbg(ap, fmt, ...) \
1294 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1296 #define ata_link_err(link, fmt, ...) \
1297 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1298 #define ata_link_warn(link, fmt, ...) \
1299 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1300 #define ata_link_notice(link, fmt, ...) \
1301 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1302 #define ata_link_info(link, fmt, ...) \
1303 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1304 #define ata_link_dbg(link, fmt, ...) \
1305 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1307 #define ata_dev_err(dev, fmt, ...) \
1308 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1309 #define ata_dev_warn(dev, fmt, ...) \
1310 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1311 #define ata_dev_notice(dev, fmt, ...) \
1312 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1313 #define ata_dev_info(dev, fmt, ...) \
1314 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1315 #define ata_dev_dbg(dev, fmt, ...) \
1316 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1318 void ata_print_version(const struct device *dev, const char *version);
1321 * ata_eh_info helpers
1323 extern __printf(2, 3)
1324 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1325 extern __printf(2, 3)
1326 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1327 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1329 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1331 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1332 ehi->flags |= ATA_EHI_HOTPLUGGED;
1333 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1334 ehi->err_mask |= AC_ERR_ATA_BUS;
1338 * port description helpers
1340 extern __printf(2, 3)
1341 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1343 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1347 static inline unsigned int ata_tag_valid(unsigned int tag)
1349 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1352 static inline unsigned int ata_tag_internal(unsigned int tag)
1354 return tag == ATA_TAG_INTERNAL;
1360 static inline unsigned int ata_class_enabled(unsigned int class)
1362 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1363 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1366 static inline unsigned int ata_class_disabled(unsigned int class)
1368 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1369 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1372 static inline unsigned int ata_class_absent(unsigned int class)
1374 return !ata_class_enabled(class) && !ata_class_disabled(class);
1377 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1379 return ata_class_enabled(dev->class);
1382 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1384 return ata_class_disabled(dev->class);
1387 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1389 return ata_class_absent(dev->class);
1395 static inline int ata_link_max_devices(const struct ata_link *link)
1397 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1402 static inline int ata_link_active(struct ata_link *link)
1404 return ata_tag_valid(link->active_tag) || link->sactive;
1410 * ATA_LITER_* constants are used to select link iteration mode and
1411 * ATA_DITER_* device iteration mode.
1413 * For a custom iteration directly using ata_{link|dev}_next(), if
1414 * @link or @dev, respectively, is NULL, the first element is
1415 * returned. @dev and @link can be any valid device or link and the
1416 * next element according to the iteration mode will be returned.
1417 * After the last element, NULL is returned.
1419 enum ata_link_iter_mode {
1420 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1421 * host link. no slave link */
1422 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1423 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1424 * slave link still comes after host link */
1427 enum ata_dev_iter_mode {
1429 ATA_DITER_ENABLED_REVERSE,
1431 ATA_DITER_ALL_REVERSE,
1434 extern struct ata_link *ata_link_next(struct ata_link *link,
1435 struct ata_port *ap,
1436 enum ata_link_iter_mode mode);
1438 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1439 struct ata_link *link,
1440 enum ata_dev_iter_mode mode);
1443 * Shortcut notation for iterations
1445 * ata_for_each_link() iterates over each link of @ap according to
1446 * @mode. @link points to the current link in the loop. @link is
1447 * NULL after loop termination. ata_for_each_dev() works the same way
1448 * except that it iterates over each device of @link.
1450 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1451 * specified when using the following shorthand notations. Only the
1452 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1453 * specified. This not only increases brevity but also makes it
1454 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1456 #define ata_for_each_link(link, ap, mode) \
1457 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1458 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1460 #define ata_for_each_dev(dev, link, mode) \
1461 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1462 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1465 * ata_ncq_enabled - Test whether NCQ is enabled
1466 * @dev: ATA device to test for
1469 * spin_lock_irqsave(host lock)
1472 * 1 if NCQ is enabled for @dev, 0 otherwise.
1474 static inline int ata_ncq_enabled(struct ata_device *dev)
1476 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1477 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1480 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1482 qc->tf.ctl |= ATA_NIEN;
1485 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1488 if (likely(ata_tag_valid(tag)))
1489 return &ap->qcmd[tag];
1493 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1496 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1498 if (unlikely(!qc) || !ap->ops->error_handler)
1501 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1502 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1508 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1510 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1513 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1515 memset(tf, 0, sizeof(*tf));
1517 #ifdef CONFIG_ATA_SFF
1518 tf->ctl = dev->link->ap->ctl;
1520 tf->ctl = ATA_DEVCTL_OBS;
1522 if (dev->devno == 0)
1523 tf->device = ATA_DEVICE_OBS;
1525 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1528 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1530 qc->dma_dir = DMA_NONE;
1535 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1538 qc->sect_size = ATA_SECT_SIZE;
1540 ata_tf_init(qc->dev, &qc->tf);
1542 /* init result_tf such that it indicates normal completion */
1543 qc->result_tf.command = ATA_DRDY;
1544 qc->result_tf.feature = 0;
1547 static inline int ata_try_flush_cache(const struct ata_device *dev)
1549 return ata_id_wcache_enabled(dev->id) ||
1550 ata_id_has_flush(dev->id) ||
1551 ata_id_has_flush_ext(dev->id);
1554 static inline unsigned int ac_err_mask(u8 status)
1556 if (status & (ATA_BUSY | ATA_DRQ))
1558 if (status & (ATA_ERR | ATA_DF))
1563 static inline unsigned int __ac_err_mask(u8 status)
1565 unsigned int mask = ac_err_mask(status);
1567 return AC_ERR_OTHER;
1571 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1573 return *(struct ata_port **)&host->hostdata[0];
1576 static inline int ata_check_ready(u8 status)
1578 if (!(status & ATA_BUSY))
1581 /* 0xff indicates either no device or device not ready */
1588 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1589 unsigned long timeout_msecs)
1591 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1594 /* Don't open code these in drivers as there are traps. Firstly the range may
1595 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1596 > UDMA_0. Dyma ddreigiau */
1598 static inline int ata_using_mwdma(struct ata_device *adev)
1600 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1605 static inline int ata_using_udma(struct ata_device *adev)
1607 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1612 static inline int ata_dma_enabled(struct ata_device *adev)
1614 return (adev->dma_mode == 0xFF ? 0 : 1);
1617 /**************************************************************************
1618 * PMP - drivers/ata/libata-pmp.c
1620 #ifdef CONFIG_SATA_PMP
1622 extern const struct ata_port_operations sata_pmp_port_ops;
1624 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1625 extern void sata_pmp_error_handler(struct ata_port *ap);
1627 #else /* CONFIG_SATA_PMP */
1629 #define sata_pmp_port_ops sata_port_ops
1630 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1631 #define sata_pmp_error_handler ata_std_error_handler
1633 #endif /* CONFIG_SATA_PMP */
1636 /**************************************************************************
1637 * SFF - drivers/ata/libata-sff.c
1639 #ifdef CONFIG_ATA_SFF
1641 extern const struct ata_port_operations ata_sff_port_ops;
1642 extern const struct ata_port_operations ata_bmdma32_port_ops;
1644 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1645 #define ATA_PIO_SHT(drv_name) \
1646 ATA_BASE_SHT(drv_name), \
1647 .sg_tablesize = LIBATA_MAX_PRD, \
1648 .dma_boundary = ATA_DMA_BOUNDARY
1650 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1651 extern u8 ata_sff_check_status(struct ata_port *ap);
1652 extern void ata_sff_pause(struct ata_port *ap);
1653 extern void ata_sff_dma_pause(struct ata_port *ap);
1654 extern int ata_sff_busy_sleep(struct ata_port *ap,
1655 unsigned long timeout_pat, unsigned long timeout);
1656 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1657 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1658 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1659 extern void ata_sff_exec_command(struct ata_port *ap,
1660 const struct ata_taskfile *tf);
1661 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1662 unsigned char *buf, unsigned int buflen, int rw);
1663 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1664 unsigned char *buf, unsigned int buflen, int rw);
1665 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1666 unsigned char *buf, unsigned int buflen, int rw);
1667 extern void ata_sff_irq_on(struct ata_port *ap);
1668 extern void ata_sff_irq_clear(struct ata_port *ap);
1669 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1670 u8 status, int in_wq);
1671 extern void ata_sff_queue_work(struct work_struct *work);
1672 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1673 unsigned long delay);
1674 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1675 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1676 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1677 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1678 struct ata_queued_cmd *qc);
1679 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1680 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1681 extern void ata_sff_freeze(struct ata_port *ap);
1682 extern void ata_sff_thaw(struct ata_port *ap);
1683 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1684 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1686 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1687 unsigned long deadline);
1688 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1689 unsigned long deadline);
1690 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1691 unsigned long deadline);
1692 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1693 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1694 extern void ata_sff_error_handler(struct ata_port *ap);
1695 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1697 extern int ata_pci_sff_init_host(struct ata_host *host);
1698 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1699 const struct ata_port_info * const * ppi,
1700 struct ata_host **r_host);
1701 extern int ata_pci_sff_activate_host(struct ata_host *host,
1702 irq_handler_t irq_handler,
1703 struct scsi_host_template *sht);
1704 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1705 const struct ata_port_info * const * ppi,
1706 struct scsi_host_template *sht, void *host_priv, int hflags);
1707 #endif /* CONFIG_PCI */
1709 #ifdef CONFIG_ATA_BMDMA
1711 extern const struct ata_port_operations ata_bmdma_port_ops;
1713 #define ATA_BMDMA_SHT(drv_name) \
1714 ATA_BASE_SHT(drv_name), \
1715 .sg_tablesize = LIBATA_MAX_PRD, \
1716 .dma_boundary = ATA_DMA_BOUNDARY
1718 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1719 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1720 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1721 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1722 struct ata_queued_cmd *qc);
1723 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1724 extern void ata_bmdma_error_handler(struct ata_port *ap);
1725 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1726 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1727 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1728 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1729 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1730 extern u8 ata_bmdma_status(struct ata_port *ap);
1731 extern int ata_bmdma_port_start(struct ata_port *ap);
1732 extern int ata_bmdma_port_start32(struct ata_port *ap);
1735 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1736 extern void ata_pci_bmdma_init(struct ata_host *host);
1737 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1738 const struct ata_port_info * const * ppi,
1739 struct ata_host **r_host);
1740 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1741 const struct ata_port_info * const * ppi,
1742 struct scsi_host_template *sht,
1743 void *host_priv, int hflags);
1744 #endif /* CONFIG_PCI */
1745 #endif /* CONFIG_ATA_BMDMA */
1748 * ata_sff_busy_wait - Wait for a port status register
1749 * @ap: Port to wait for.
1750 * @bits: bits that must be clear
1751 * @max: number of 10uS waits to perform
1753 * Waits up to max*10 microseconds for the selected bits in the port's
1754 * status register to be cleared.
1755 * Returns final value of status register.
1758 * Inherited from caller.
1760 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1767 status = ap->ops->sff_check_status(ap);
1769 } while (status != 0xff && (status & bits) && (max > 0));
1775 * ata_wait_idle - Wait for a port to be idle.
1776 * @ap: Port to wait for.
1778 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1779 * Returns final value of status register.
1782 * Inherited from caller.
1784 static inline u8 ata_wait_idle(struct ata_port *ap)
1786 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1789 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1790 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1796 #endif /* CONFIG_ATA_SFF */
1798 #endif /* __LINUX_LIBATA_H__ */