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x86: hpet: allow force enable on ICH10 HPET
[linux-2.6/linux-2.6-openrd.git] / include / linux / libata.h
blobb6b8a7f3ec66064778cf2b63b6eaa4a03dc25495
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
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)
9 * any later version.
10 *
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.
15 *
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.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
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>
34 #include <linux/io.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
41 /*
42 * Define if arch has non-standard setup. This is a _PCI_ standard
43 * not a legacy or ISA standard.
44 */
45 #ifdef CONFIG_ATA_NONSTANDARD
46 #include <asm/libata-portmap.h>
47 #else
48 #include <asm-generic/libata-portmap.h>
49 #endif
50
51 /*
52 * compile-time options: to be removed as soon as all the drivers are
53 * converted to the new debugging mechanism
54 */
55 #undef ATA_DEBUG /* debugging output */
56 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
57 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
58 #undef ATA_NDEBUG /* define to disable quick runtime checks */
59
60
61 /* note: prints function name for you */
62 #ifdef ATA_DEBUG
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
66 #else
67 #define VPRINTK(fmt, args...)
68 #endif /* ATA_VERBOSE_DEBUG */
69 #else
70 #define DPRINTK(fmt, args...)
71 #define VPRINTK(fmt, args...)
72 #endif /* ATA_DEBUG */
73
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
75
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
78
79 enum {
80 ATA_MSG_DRV = 0x0001,
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_CTL = 0x0020,
86 ATA_MSG_INTR = 0x0040,
87 ATA_MSG_ERR = 0x0080,
88 };
89
90 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98
99 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100 {
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 if (!dval)
104 return 0;
105 return (1 << dval) - 1;
106 }
107
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
110
111 enum {
112 /* various global constants */
113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
115 ATA_DEF_QUEUE = 1,
116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
117 ATA_MAX_QUEUE = 32,
118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
119 ATA_SHORT_PAUSE = 16,
120
121 ATAPI_MAX_DRAIN = 16 << 10,
122
123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
124
125 ATA_SHT_EMULATED = 1,
126 ATA_SHT_CMD_PER_LUN = 1,
127 ATA_SHT_THIS_ID = -1,
128 ATA_SHT_USE_CLUSTERING = 1,
129
130 /* struct ata_device stuff */
131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
138 ATA_DFLAG_AN = (1 << 7), /* AN configured */
139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
143
144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
147 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
148 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
149 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
151
152 ATA_DFLAG_DETACH = (1 << 24),
153 ATA_DFLAG_DETACHED = (1 << 25),
154
155 ATA_DEV_UNKNOWN = 0, /* unknown device */
156 ATA_DEV_ATA = 1, /* ATA device */
157 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
158 ATA_DEV_ATAPI = 3, /* ATAPI device */
159 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
160 ATA_DEV_PMP = 5, /* SATA port multiplier */
161 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
162 ATA_DEV_SEMB = 7, /* SEMB */
163 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
164 ATA_DEV_NONE = 9, /* no device */
165
166 /* struct ata_link flags */
167 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
168 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
169 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
170 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
171 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
174 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
175
176 /* struct ata_port flags */
177 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
178 /* (doesn't imply presence) */
179 ATA_FLAG_SATA = (1 << 1),
180 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
181 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
182 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
183 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
184 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
185 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
186 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
187 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
188 * doesn't handle PIO interrupts */
189 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
190 ATA_FLAG_DEBUGMSG = (1 << 13),
191 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
192 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
193 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
194 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
195 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
196 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
197 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
198 * management */
199 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
200 * led */
201
202 /* The following flag belongs to ap->pflags but is kept in
203 * ap->flags because it's referenced in many LLDs and will be
204 * removed in not-too-distant future.
205 */
206 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
207
208 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
209
210 /* struct ata_port pflags */
211 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
212 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
213 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
214 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
215 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
216 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
217 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
218 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
219 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
220 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
221
222 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
223 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
224 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
225
226 /* struct ata_queued_cmd flags */
227 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
228 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
229 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
230 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
231 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
232 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
233 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
234
235 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
236 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
237 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
238
239 /* host set flags */
240 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
241 ATA_HOST_STARTED = (1 << 1), /* Host started */
242 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
243
244 /* bits 24:31 of host->flags are reserved for LLD specific flags */
245
246 /* various lengths of time */
247 ATA_TMOUT_BOOT = 30000, /* heuristic */
248 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
249 ATA_TMOUT_INTERNAL_QUICK = 5000,
250 ATA_TMOUT_MAX_PARK = 30000,
251
252 /* FIXME: GoVault needs 2s but we can't afford that without
253 * parallel probing. 800ms is enough for iVDR disk
254 * HHD424020F7SV00. Increase to 2secs when parallel probing
255 * is in place.
256 */
257 ATA_TMOUT_FF_WAIT = 800,
258
259 /* Spec mandates to wait for ">= 2ms" before checking status
260 * after reset. We wait 150ms, because that was the magic
261 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
262 * the period of time between when the ATA command register is
263 * written, and then status is checked. Because waiting for
264 * "a while" before checking status is fine, post SRST, we
265 * perform this magic delay here as well.
266 *
267 * Old drivers/ide uses the 2mS rule and then waits for ready.
268 */
269 ATA_WAIT_AFTER_RESET = 150,
270
271 /* If PMP is supported, we have to do follow-up SRST. As some
272 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
273 * advised to wait only for the following duration before
274 * doing SRST.
275 */
276 ATA_TMOUT_PMP_SRST_WAIT = 1000,
277
278 /* ATA bus states */
279 BUS_UNKNOWN = 0,
280 BUS_DMA = 1,
281 BUS_IDLE = 2,
282 BUS_NOINTR = 3,
283 BUS_NODATA = 4,
284 BUS_TIMER = 5,
285 BUS_PIO = 6,
286 BUS_EDD = 7,
287 BUS_IDENTIFY = 8,
288 BUS_PACKET = 9,
289
290 /* SATA port states */
291 PORT_UNKNOWN = 0,
292 PORT_ENABLED = 1,
293 PORT_DISABLED = 2,
294
295 /* encoding various smaller bitmaps into a single
296 * unsigned long bitmap
297 */
298 ATA_NR_PIO_MODES = 7,
299 ATA_NR_MWDMA_MODES = 5,
300 ATA_NR_UDMA_MODES = 8,
301
302 ATA_SHIFT_PIO = 0,
303 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
304 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
305
306 /* size of buffer to pad xfers ending on unaligned boundaries */
307 ATA_DMA_PAD_SZ = 4,
308
309 /* ering size */
310 ATA_ERING_SIZE = 32,
311
312 /* return values for ->qc_defer */
313 ATA_DEFER_LINK = 1,
314 ATA_DEFER_PORT = 2,
315
316 /* desc_len for ata_eh_info and context */
317 ATA_EH_DESC_LEN = 80,
318
319 /* reset / recovery action types */
320 ATA_EH_REVALIDATE = (1 << 0),
321 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
322 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
323 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
324 ATA_EH_ENABLE_LINK = (1 << 3),
325 ATA_EH_LPM = (1 << 4), /* link power management action */
326 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
327
328 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
329 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
330 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
331
332 /* ata_eh_info->flags */
333 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
334 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
335 ATA_EHI_QUIET = (1 << 3), /* be quiet */
336
337 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
338 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
339 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
340 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
341 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
342
343 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
344
345 /* mask of flags to transfer *to* the slave link */
346 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
347
348 /* max tries if error condition is still set after ->error_handler */
349 ATA_EH_MAX_TRIES = 5,
350
351 /* how hard are we gonna try to probe/recover devices */
352 ATA_PROBE_MAX_TRIES = 3,
353 ATA_EH_DEV_TRIES = 3,
354 ATA_EH_PMP_TRIES = 5,
355 ATA_EH_PMP_LINK_TRIES = 3,
356
357 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
358
359 /* This should match the actual table size of
360 * ata_eh_cmd_timeout_table in libata-eh.c.
361 */
362 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
363
364 /* Horkage types. May be set by libata or controller on drives
365 (some horkage may be drive/controller pair dependant */
366
367 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
368 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
369 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
370 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
371 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
372 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
373 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
374 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
375 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
376 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
377 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
378 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
379 not multiple of 16 bytes */
380 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firwmare update warning */
381
382 /* DMA mask for user DMA control: User visible values; DO NOT
383 renumber */
384 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
385 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
386 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
387
388 /* ATAPI command types */
389 ATAPI_READ = 0, /* READs */
390 ATAPI_WRITE = 1, /* WRITEs */
391 ATAPI_READ_CD = 2, /* READ CD [MSF] */
392 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
393 ATAPI_MISC = 4, /* the rest */
394
395 /* Timing constants */
396 ATA_TIMING_SETUP = (1 << 0),
397 ATA_TIMING_ACT8B = (1 << 1),
398 ATA_TIMING_REC8B = (1 << 2),
399 ATA_TIMING_CYC8B = (1 << 3),
400 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
401 ATA_TIMING_CYC8B,
402 ATA_TIMING_ACTIVE = (1 << 4),
403 ATA_TIMING_RECOVER = (1 << 5),
404 ATA_TIMING_CYCLE = (1 << 6),
405 ATA_TIMING_UDMA = (1 << 7),
406 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
407 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
408 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
409 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
410 };
411
412 enum ata_xfer_mask {
413 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
414 << ATA_SHIFT_PIO,
415 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
416 << ATA_SHIFT_MWDMA,
417 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
418 << ATA_SHIFT_UDMA,
419 };
420
421 enum hsm_task_states {
422 HSM_ST_IDLE, /* no command on going */
423 HSM_ST_FIRST, /* (waiting the device to)
424 write CDB or first data block */
425 HSM_ST, /* (waiting the device to) transfer data */
426 HSM_ST_LAST, /* (waiting the device to) complete command */
427 HSM_ST_ERR, /* error */
428 };
429
430 enum ata_completion_errors {
431 AC_ERR_DEV = (1 << 0), /* device reported error */
432 AC_ERR_HSM = (1 << 1), /* host state machine violation */
433 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
434 AC_ERR_MEDIA = (1 << 3), /* media error */
435 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
436 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
437 AC_ERR_SYSTEM = (1 << 6), /* system error */
438 AC_ERR_INVALID = (1 << 7), /* invalid argument */
439 AC_ERR_OTHER = (1 << 8), /* unknown */
440 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
441 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
442 };
443
444 /* forward declarations */
445 struct scsi_device;
446 struct ata_port_operations;
447 struct ata_port;
448 struct ata_link;
449 struct ata_queued_cmd;
450
451 /* typedefs */
452 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
453 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
454 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
455 unsigned long deadline);
456 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
457
458 /*
459 * host pm policy: If you alter this, you also need to alter libata-scsi.c
460 * (for the ascii descriptions)
461 */
462 enum link_pm {
463 NOT_AVAILABLE,
464 MIN_POWER,
465 MAX_PERFORMANCE,
466 MEDIUM_POWER,
467 };
468 extern struct device_attribute dev_attr_link_power_management_policy;
469 extern struct device_attribute dev_attr_unload_heads;
470 extern struct device_attribute dev_attr_em_message_type;
471 extern struct device_attribute dev_attr_em_message;
472 extern struct device_attribute dev_attr_sw_activity;
473
474 enum sw_activity {
475 OFF,
476 BLINK_ON,
477 BLINK_OFF,
478 };
479
480 #ifdef CONFIG_ATA_SFF
481 struct ata_ioports {
482 void __iomem *cmd_addr;
483 void __iomem *data_addr;
484 void __iomem *error_addr;
485 void __iomem *feature_addr;
486 void __iomem *nsect_addr;
487 void __iomem *lbal_addr;
488 void __iomem *lbam_addr;
489 void __iomem *lbah_addr;
490 void __iomem *device_addr;
491 void __iomem *status_addr;
492 void __iomem *command_addr;
493 void __iomem *altstatus_addr;
494 void __iomem *ctl_addr;
495 void __iomem *bmdma_addr;
496 void __iomem *scr_addr;
497 };
498 #endif /* CONFIG_ATA_SFF */
499
500 struct ata_host {
501 spinlock_t lock;
502 struct device *dev;
503 void __iomem * const *iomap;
504 unsigned int n_ports;
505 void *private_data;
506 struct ata_port_operations *ops;
507 unsigned long flags;
508 #ifdef CONFIG_ATA_ACPI
509 acpi_handle acpi_handle;
510 #endif
511 struct ata_port *simplex_claimed; /* channel owning the DMA */
512 struct ata_port *ports[0];
513 };
514
515 struct ata_queued_cmd {
516 struct ata_port *ap;
517 struct ata_device *dev;
518
519 struct scsi_cmnd *scsicmd;
520 void (*scsidone)(struct scsi_cmnd *);
521
522 struct ata_taskfile tf;
523 u8 cdb[ATAPI_CDB_LEN];
524
525 unsigned long flags; /* ATA_QCFLAG_xxx */
526 unsigned int tag;
527 unsigned int n_elem;
528
529 int dma_dir;
530
531 unsigned int sect_size;
532
533 unsigned int nbytes;
534 unsigned int extrabytes;
535 unsigned int curbytes;
536
537 struct scatterlist *cursg;
538 unsigned int cursg_ofs;
539
540 struct scatterlist sgent;
541
542 struct scatterlist *sg;
543
544 unsigned int err_mask;
545 struct ata_taskfile result_tf;
546 ata_qc_cb_t complete_fn;
547
548 void *private_data;
549 void *lldd_task;
550 };
551
552 struct ata_port_stats {
553 unsigned long unhandled_irq;
554 unsigned long idle_irq;
555 unsigned long rw_reqbuf;
556 };
557
558 struct ata_ering_entry {
559 unsigned int eflags;
560 unsigned int err_mask;
561 u64 timestamp;
562 };
563
564 struct ata_ering {
565 int cursor;
566 struct ata_ering_entry ring[ATA_ERING_SIZE];
567 };
568
569 struct ata_device {
570 struct ata_link *link;
571 unsigned int devno; /* 0 or 1 */
572 unsigned int horkage; /* List of broken features */
573 unsigned long flags; /* ATA_DFLAG_xxx */
574 struct scsi_device *sdev; /* attached SCSI device */
575 #ifdef CONFIG_ATA_ACPI
576 acpi_handle acpi_handle;
577 union acpi_object *gtf_cache;
578 #endif
579 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
580 u64 n_sectors; /* size of device, if ATA */
581 unsigned int class; /* ATA_DEV_xxx */
582 unsigned long unpark_deadline;
583
584 u8 pio_mode;
585 u8 dma_mode;
586 u8 xfer_mode;
587 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
588
589 unsigned int multi_count; /* sectors count for
590 READ/WRITE MULTIPLE */
591 unsigned int max_sectors; /* per-device max sectors */
592 unsigned int cdb_len;
593
594 /* per-dev xfer mask */
595 unsigned long pio_mask;
596 unsigned long mwdma_mask;
597 unsigned long udma_mask;
598
599 /* for CHS addressing */
600 u16 cylinders; /* Number of cylinders */
601 u16 heads; /* Number of heads */
602 u16 sectors; /* Number of sectors per track */
603
604 /* error history */
605 int spdn_cnt;
606 struct ata_ering ering;
607
608 union {
609 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
610 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
611 };
612 };
613
614 /* Offset into struct ata_device. Fields above it are maintained
615 * acress device init. Fields below are zeroed.
616 */
617 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
618
619 struct ata_eh_info {
620 struct ata_device *dev; /* offending device */
621 u32 serror; /* SError from LLDD */
622 unsigned int err_mask; /* port-wide err_mask */
623 unsigned int action; /* ATA_EH_* action mask */
624 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
625 unsigned int flags; /* ATA_EHI_* flags */
626
627 unsigned int probe_mask;
628
629 char desc[ATA_EH_DESC_LEN];
630 int desc_len;
631 };
632
633 struct ata_eh_context {
634 struct ata_eh_info i;
635 int tries[ATA_MAX_DEVICES];
636 int cmd_timeout_idx[ATA_MAX_DEVICES]
637 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
638 unsigned int classes[ATA_MAX_DEVICES];
639 unsigned int did_probe_mask;
640 unsigned int unloaded_mask;
641 unsigned int saved_ncq_enabled;
642 u8 saved_xfer_mode[ATA_MAX_DEVICES];
643 /* timestamp for the last reset attempt or success */
644 unsigned long last_reset;
645 };
646
647 struct ata_acpi_drive
648 {
649 u32 pio;
650 u32 dma;
651 } __packed;
652
653 struct ata_acpi_gtm {
654 struct ata_acpi_drive drive[2];
655 u32 flags;
656 } __packed;
657
658 struct ata_link {
659 struct ata_port *ap;
660 int pmp; /* port multiplier port # */
661
662 unsigned int active_tag; /* active tag on this link */
663 u32 sactive; /* active NCQ commands */
664
665 unsigned int flags; /* ATA_LFLAG_xxx */
666
667 u32 saved_scontrol; /* SControl on probe */
668 unsigned int hw_sata_spd_limit;
669 unsigned int sata_spd_limit;
670 unsigned int sata_spd; /* current SATA PHY speed */
671
672 /* record runtime error info, protected by host_set lock */
673 struct ata_eh_info eh_info;
674 /* EH context */
675 struct ata_eh_context eh_context;
676
677 struct ata_device device[ATA_MAX_DEVICES];
678 };
679
680 struct ata_port {
681 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
682 struct ata_port_operations *ops;
683 spinlock_t *lock;
684 unsigned long flags; /* ATA_FLAG_xxx */
685 unsigned int pflags; /* ATA_PFLAG_xxx */
686 unsigned int print_id; /* user visible unique port ID */
687 unsigned int port_no; /* 0 based port no. inside the host */
688
689 struct ata_prd *prd; /* our SG list */
690 dma_addr_t prd_dma; /* and its DMA mapping */
691
692 #ifdef CONFIG_ATA_SFF
693 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
694 #endif /* CONFIG_ATA_SFF */
695
696 u8 ctl; /* cache of ATA control register */
697 u8 last_ctl; /* Cache last written value */
698 unsigned int pio_mask;
699 unsigned int mwdma_mask;
700 unsigned int udma_mask;
701 unsigned int cbl; /* cable type; ATA_CBL_xxx */
702
703 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
704 unsigned long qc_allocated;
705 unsigned int qc_active;
706 int nr_active_links; /* #links with active qcs */
707
708 struct ata_link link; /* host default link */
709 struct ata_link *slave_link; /* see ata_slave_link_init() */
710
711 int nr_pmp_links; /* nr of available PMP links */
712 struct ata_link *pmp_link; /* array of PMP links */
713 struct ata_link *excl_link; /* for PMP qc exclusion */
714
715 struct ata_port_stats stats;
716 struct ata_host *host;
717 struct device *dev;
718
719 void *port_task_data;
720 struct delayed_work port_task;
721 struct delayed_work hotplug_task;
722 struct work_struct scsi_rescan_task;
723
724 unsigned int hsm_task_state;
725
726 u32 msg_enable;
727 struct list_head eh_done_q;
728 wait_queue_head_t eh_wait_q;
729 int eh_tries;
730 struct completion park_req_pending;
731
732 pm_message_t pm_mesg;
733 int *pm_result;
734 enum link_pm pm_policy;
735
736 struct timer_list fastdrain_timer;
737 unsigned long fastdrain_cnt;
738
739 int em_message_type;
740 void *private_data;
741
742 #ifdef CONFIG_ATA_ACPI
743 acpi_handle acpi_handle;
744 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
745 #endif
746 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
747 };
748
749 /* The following initializer overrides a method to NULL whether one of
750 * its parent has the method defined or not. This is equivalent to
751 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
752 * expression and thus can't be used as an initializer.
753 */
754 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
755
756 struct ata_port_operations {
757 /*
758 * Command execution
759 */
760 int (*qc_defer)(struct ata_queued_cmd *qc);
761 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
762 void (*qc_prep)(struct ata_queued_cmd *qc);
763 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
764 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
765
766 /*
767 * Configuration and exception handling
768 */
769 int (*cable_detect)(struct ata_port *ap);
770 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
771 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
772 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
773 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
774 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
775
776 void (*dev_config)(struct ata_device *dev);
777
778 void (*freeze)(struct ata_port *ap);
779 void (*thaw)(struct ata_port *ap);
780 ata_prereset_fn_t prereset;
781 ata_reset_fn_t softreset;
782 ata_reset_fn_t hardreset;
783 ata_postreset_fn_t postreset;
784 ata_prereset_fn_t pmp_prereset;
785 ata_reset_fn_t pmp_softreset;
786 ata_reset_fn_t pmp_hardreset;
787 ata_postreset_fn_t pmp_postreset;
788 void (*error_handler)(struct ata_port *ap);
789 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
790
791 /*
792 * Optional features
793 */
794 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
795 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
796 void (*pmp_attach)(struct ata_port *ap);
797 void (*pmp_detach)(struct ata_port *ap);
798 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
799 void (*disable_pm)(struct ata_port *ap);
800
801 /*
802 * Start, stop, suspend and resume
803 */
804 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
805 int (*port_resume)(struct ata_port *ap);
806 int (*port_start)(struct ata_port *ap);
807 void (*port_stop)(struct ata_port *ap);
808 void (*host_stop)(struct ata_host *host);
809
810 #ifdef CONFIG_ATA_SFF
811 /*
812 * SFF / taskfile oriented ops
813 */
814 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
815 u8 (*sff_check_status)(struct ata_port *ap);
816 u8 (*sff_check_altstatus)(struct ata_port *ap);
817 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
818 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
819 void (*sff_exec_command)(struct ata_port *ap,
820 const struct ata_taskfile *tf);
821 unsigned int (*sff_data_xfer)(struct ata_device *dev,
822 unsigned char *buf, unsigned int buflen, int rw);
823 u8 (*sff_irq_on)(struct ata_port *);
824 void (*sff_irq_clear)(struct ata_port *);
825
826 void (*bmdma_setup)(struct ata_queued_cmd *qc);
827 void (*bmdma_start)(struct ata_queued_cmd *qc);
828 void (*bmdma_stop)(struct ata_queued_cmd *qc);
829 u8 (*bmdma_status)(struct ata_port *ap);
830 #endif /* CONFIG_ATA_SFF */
831
832 ssize_t (*em_show)(struct ata_port *ap, char *buf);
833 ssize_t (*em_store)(struct ata_port *ap, const char *message,
834 size_t size);
835 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
836 ssize_t (*sw_activity_store)(struct ata_device *dev,
837 enum sw_activity val);
838 /*
839 * Obsolete
840 */
841 void (*phy_reset)(struct ata_port *ap);
842 void (*eng_timeout)(struct ata_port *ap);
843
844 /*
845 * ->inherits must be the last field and all the preceding
846 * fields must be pointers.
847 */
848 const struct ata_port_operations *inherits;
849 };
850
851 struct ata_port_info {
852 unsigned long flags;
853 unsigned long link_flags;
854 unsigned long pio_mask;
855 unsigned long mwdma_mask;
856 unsigned long udma_mask;
857 struct ata_port_operations *port_ops;
858 void *private_data;
859 };
860
861 struct ata_timing {
862 unsigned short mode; /* ATA mode */
863 unsigned short setup; /* t1 */
864 unsigned short act8b; /* t2 for 8-bit I/O */
865 unsigned short rec8b; /* t2i for 8-bit I/O */
866 unsigned short cyc8b; /* t0 for 8-bit I/O */
867 unsigned short active; /* t2 or tD */
868 unsigned short recover; /* t2i or tK */
869 unsigned short cycle; /* t0 */
870 unsigned short udma; /* t2CYCTYP/2 */
871 };
872
873 /*
874 * Core layer - drivers/ata/libata-core.c
875 */
876 extern const unsigned long sata_deb_timing_normal[];
877 extern const unsigned long sata_deb_timing_hotplug[];
878 extern const unsigned long sata_deb_timing_long[];
879
880 extern struct ata_port_operations ata_dummy_port_ops;
881 extern const struct ata_port_info ata_dummy_port_info;
882
883 static inline const unsigned long *
884 sata_ehc_deb_timing(struct ata_eh_context *ehc)
885 {
886 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
887 return sata_deb_timing_hotplug;
888 else
889 return sata_deb_timing_normal;
890 }
891
892 static inline int ata_port_is_dummy(struct ata_port *ap)
893 {
894 return ap->ops == &ata_dummy_port_ops;
895 }
896
897 extern void ata_port_probe(struct ata_port *);
898 extern int sata_set_spd(struct ata_link *link);
899 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
900 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
901 int (*check_ready)(struct ata_link *link));
902 extern int sata_link_debounce(struct ata_link *link,
903 const unsigned long *params, unsigned long deadline);
904 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
905 unsigned long deadline);
906 extern int sata_link_hardreset(struct ata_link *link,
907 const unsigned long *timing, unsigned long deadline,
908 bool *online, int (*check_ready)(struct ata_link *));
909 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
910 unsigned long deadline);
911 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
912 extern void ata_port_disable(struct ata_port *);
913
914 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
915 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
916 const struct ata_port_info * const * ppi, int n_ports);
917 extern int ata_slave_link_init(struct ata_port *ap);
918 extern int ata_host_start(struct ata_host *host);
919 extern int ata_host_register(struct ata_host *host,
920 struct scsi_host_template *sht);
921 extern int ata_host_activate(struct ata_host *host, int irq,
922 irq_handler_t irq_handler, unsigned long irq_flags,
923 struct scsi_host_template *sht);
924 extern void ata_host_detach(struct ata_host *host);
925 extern void ata_host_init(struct ata_host *, struct device *,
926 unsigned long, struct ata_port_operations *);
927 extern int ata_scsi_detect(struct scsi_host_template *sht);
928 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
929 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
930 extern void ata_sas_port_destroy(struct ata_port *);
931 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
932 struct ata_port_info *, struct Scsi_Host *);
933 extern int ata_sas_port_init(struct ata_port *);
934 extern int ata_sas_port_start(struct ata_port *ap);
935 extern void ata_sas_port_stop(struct ata_port *ap);
936 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
937 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
938 struct ata_port *ap);
939 extern int sata_scr_valid(struct ata_link *link);
940 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
941 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
942 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
943 extern bool ata_link_online(struct ata_link *link);
944 extern bool ata_link_offline(struct ata_link *link);
945 #ifdef CONFIG_PM
946 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
947 extern void ata_host_resume(struct ata_host *host);
948 #endif
949 extern int ata_ratelimit(void);
950 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
951 unsigned long interval, unsigned long timeout);
952 extern int atapi_cmd_type(u8 opcode);
953 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
954 u8 pmp, int is_cmd, u8 *fis);
955 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
956 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
957 unsigned long mwdma_mask, unsigned long udma_mask);
958 extern void ata_unpack_xfermask(unsigned long xfer_mask,
959 unsigned long *pio_mask, unsigned long *mwdma_mask,
960 unsigned long *udma_mask);
961 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
962 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
963 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
964 extern const char *ata_mode_string(unsigned long xfer_mask);
965 extern unsigned long ata_id_xfermask(const u16 *id);
966 extern int ata_port_start(struct ata_port *ap);
967 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
968 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
969 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
970 unsigned int n_elem);
971 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
972 extern void ata_dev_disable(struct ata_device *adev);
973 extern void ata_id_string(const u16 *id, unsigned char *s,
974 unsigned int ofs, unsigned int len);
975 extern void ata_id_c_string(const u16 *id, unsigned char *s,
976 unsigned int ofs, unsigned int len);
977 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
978 struct ata_taskfile *tf, u16 *id);
979 extern void ata_qc_complete(struct ata_queued_cmd *qc);
980 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
981 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
982 void (*done)(struct scsi_cmnd *));
983 extern int ata_std_bios_param(struct scsi_device *sdev,
984 struct block_device *bdev,
985 sector_t capacity, int geom[]);
986 extern int ata_scsi_slave_config(struct scsi_device *sdev);
987 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
988 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
989 int queue_depth);
990 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
991 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
992
993 extern int ata_cable_40wire(struct ata_port *ap);
994 extern int ata_cable_80wire(struct ata_port *ap);
995 extern int ata_cable_sata(struct ata_port *ap);
996 extern int ata_cable_ignore(struct ata_port *ap);
997 extern int ata_cable_unknown(struct ata_port *ap);
998
999 /* Timing helpers */
1000 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1001 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1002 extern int ata_timing_compute(struct ata_device *, unsigned short,
1003 struct ata_timing *, int, int);
1004 extern void ata_timing_merge(const struct ata_timing *,
1005 const struct ata_timing *, struct ata_timing *,
1006 unsigned int);
1007 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1008
1009 /* PCI */
1010 #ifdef CONFIG_PCI
1011 struct pci_dev;
1012
1013 struct pci_bits {
1014 unsigned int reg; /* PCI config register to read */
1015 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1016 unsigned long mask;
1017 unsigned long val;
1018 };
1019
1020 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1021 extern void ata_pci_remove_one(struct pci_dev *pdev);
1022
1023 #ifdef CONFIG_PM
1024 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1025 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1026 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1027 extern int ata_pci_device_resume(struct pci_dev *pdev);
1028 #endif /* CONFIG_PM */
1029 #endif /* CONFIG_PCI */
1030
1031 /*
1032 * ACPI - drivers/ata/libata-acpi.c
1033 */
1034 #ifdef CONFIG_ATA_ACPI
1035 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1036 {
1037 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1038 return &ap->__acpi_init_gtm;
1039 return NULL;
1040 }
1041 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1042 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1043 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1044 const struct ata_acpi_gtm *gtm);
1045 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1046 #else
1047 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1048 {
1049 return NULL;
1050 }
1051
1052 static inline int ata_acpi_stm(const struct ata_port *ap,
1053 struct ata_acpi_gtm *stm)
1054 {
1055 return -ENOSYS;
1056 }
1057
1058 static inline int ata_acpi_gtm(const struct ata_port *ap,
1059 struct ata_acpi_gtm *stm)
1060 {
1061 return -ENOSYS;
1062 }
1063
1064 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1065 const struct ata_acpi_gtm *gtm)
1066 {
1067 return 0;
1068 }
1069
1070 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1071 const struct ata_acpi_gtm *gtm)
1072 {
1073 return 0;
1074 }
1075 #endif
1076
1077 /*
1078 * EH - drivers/ata/libata-eh.c
1079 */
1080 extern void ata_port_schedule_eh(struct ata_port *ap);
1081 extern int ata_link_abort(struct ata_link *link);
1082 extern int ata_port_abort(struct ata_port *ap);
1083 extern int ata_port_freeze(struct ata_port *ap);
1084 extern int sata_async_notification(struct ata_port *ap);
1085
1086 extern void ata_eh_freeze_port(struct ata_port *ap);
1087 extern void ata_eh_thaw_port(struct ata_port *ap);
1088
1089 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1090 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1091 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1092
1093 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1094 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1095 ata_postreset_fn_t postreset);
1096 extern void ata_std_error_handler(struct ata_port *ap);
1097
1098 /*
1099 * Base operations to inherit from and initializers for sht
1100 *
1101 * Operations
1102 *
1103 * base : Common to all libata drivers.
1104 * sata : SATA controllers w/ native interface.
1105 * pmp : SATA controllers w/ PMP support.
1106 * sff : SFF ATA controllers w/o BMDMA support.
1107 * bmdma : SFF ATA controllers w/ BMDMA support.
1108 *
1109 * sht initializers
1110 *
1111 * BASE : Common to all libata drivers. The user must set
1112 * sg_tablesize and dma_boundary.
1113 * PIO : SFF ATA controllers w/ only PIO support.
1114 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1115 * dma_boundary are set to BMDMA limits.
1116 * NCQ : SATA controllers supporting NCQ. The user must set
1117 * sg_tablesize, dma_boundary and can_queue.
1118 */
1119 extern const struct ata_port_operations ata_base_port_ops;
1120 extern const struct ata_port_operations sata_port_ops;
1121 extern struct device_attribute *ata_common_sdev_attrs[];
1122
1123 #define ATA_BASE_SHT(drv_name) \
1124 .module = THIS_MODULE, \
1125 .name = drv_name, \
1126 .ioctl = ata_scsi_ioctl, \
1127 .queuecommand = ata_scsi_queuecmd, \
1128 .can_queue = ATA_DEF_QUEUE, \
1129 .this_id = ATA_SHT_THIS_ID, \
1130 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1131 .emulated = ATA_SHT_EMULATED, \
1132 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1133 .proc_name = drv_name, \
1134 .slave_configure = ata_scsi_slave_config, \
1135 .slave_destroy = ata_scsi_slave_destroy, \
1136 .bios_param = ata_std_bios_param, \
1137 .sdev_attrs = ata_common_sdev_attrs
1138
1139 #define ATA_NCQ_SHT(drv_name) \
1140 ATA_BASE_SHT(drv_name), \
1141 .change_queue_depth = ata_scsi_change_queue_depth
1142
1143 /*
1144 * PMP helpers
1145 */
1146 #ifdef CONFIG_SATA_PMP
1147 static inline bool sata_pmp_supported(struct ata_port *ap)
1148 {
1149 return ap->flags & ATA_FLAG_PMP;
1150 }
1151
1152 static inline bool sata_pmp_attached(struct ata_port *ap)
1153 {
1154 return ap->nr_pmp_links != 0;
1155 }
1156
1157 static inline int ata_is_host_link(const struct ata_link *link)
1158 {
1159 return link == &link->ap->link || link == link->ap->slave_link;
1160 }
1161 #else /* CONFIG_SATA_PMP */
1162 static inline bool sata_pmp_supported(struct ata_port *ap)
1163 {
1164 return false;
1165 }
1166
1167 static inline bool sata_pmp_attached(struct ata_port *ap)
1168 {
1169 return false;
1170 }
1171
1172 static inline int ata_is_host_link(const struct ata_link *link)
1173 {
1174 return 1;
1175 }
1176 #endif /* CONFIG_SATA_PMP */
1177
1178 static inline int sata_srst_pmp(struct ata_link *link)
1179 {
1180 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1181 return SATA_PMP_CTRL_PORT;
1182 return link->pmp;
1183 }
1184
1185 /*
1186 * printk helpers
1187 */
1188 #define ata_port_printk(ap, lv, fmt, args...) \
1189 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1190
1191 #define ata_link_printk(link, lv, fmt, args...) do { \
1192 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1193 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1194 (link)->pmp , ##args); \
1195 else \
1196 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1197 } while(0)
1198
1199 #define ata_dev_printk(dev, lv, fmt, args...) \
1200 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1201 (dev)->link->pmp + (dev)->devno , ##args)
1202
1203 /*
1204 * ata_eh_info helpers
1205 */
1206 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1207 __attribute__ ((format (printf, 2, 3)));
1208 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1209 __attribute__ ((format (printf, 2, 3)));
1210 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1211
1212 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1213 {
1214 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1215 ehi->flags |= ATA_EHI_HOTPLUGGED;
1216 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1217 ehi->err_mask |= AC_ERR_ATA_BUS;
1218 }
1219
1220 /*
1221 * port description helpers
1222 */
1223 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1224 __attribute__ ((format (printf, 2, 3)));
1225 #ifdef CONFIG_PCI
1226 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1227 const char *name);
1228 #endif
1229
1230 static inline unsigned int ata_tag_valid(unsigned int tag)
1231 {
1232 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1233 }
1234
1235 static inline unsigned int ata_tag_internal(unsigned int tag)
1236 {
1237 return tag == ATA_TAG_INTERNAL;
1238 }
1239
1240 /*
1241 * device helpers
1242 */
1243 static inline unsigned int ata_class_enabled(unsigned int class)
1244 {
1245 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1246 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1247 }
1248
1249 static inline unsigned int ata_class_disabled(unsigned int class)
1250 {
1251 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1252 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1253 }
1254
1255 static inline unsigned int ata_class_absent(unsigned int class)
1256 {
1257 return !ata_class_enabled(class) && !ata_class_disabled(class);
1258 }
1259
1260 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1261 {
1262 return ata_class_enabled(dev->class);
1263 }
1264
1265 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1266 {
1267 return ata_class_disabled(dev->class);
1268 }
1269
1270 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1271 {
1272 return ata_class_absent(dev->class);
1273 }
1274
1275 /*
1276 * link helpers
1277 */
1278 static inline int ata_link_max_devices(const struct ata_link *link)
1279 {
1280 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1281 return 2;
1282 return 1;
1283 }
1284
1285 static inline int ata_link_active(struct ata_link *link)
1286 {
1287 return ata_tag_valid(link->active_tag) || link->sactive;
1288 }
1289
1290 /*
1291 * Iterators
1292 *
1293 * ATA_LITER_* constants are used to select link iteration mode and
1294 * ATA_DITER_* device iteration mode.
1295 *
1296 * For a custom iteration directly using ata_{link|dev}_next(), if
1297 * @link or @dev, respectively, is NULL, the first element is
1298 * returned. @dev and @link can be any valid device or link and the
1299 * next element according to the iteration mode will be returned.
1300 * After the last element, NULL is returned.
1301 */
1302 enum ata_link_iter_mode {
1303 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1304 * host link. no slave link */
1305 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1306 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1307 * slave link still comes after host link */
1308 };
1309
1310 enum ata_dev_iter_mode {
1311 ATA_DITER_ENABLED,
1312 ATA_DITER_ENABLED_REVERSE,
1313 ATA_DITER_ALL,
1314 ATA_DITER_ALL_REVERSE,
1315 };
1316
1317 extern struct ata_link *ata_link_next(struct ata_link *link,
1318 struct ata_port *ap,
1319 enum ata_link_iter_mode mode);
1320
1321 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1322 struct ata_link *link,
1323 enum ata_dev_iter_mode mode);
1324
1325 /*
1326 * Shortcut notation for iterations
1327 *
1328 * ata_for_each_link() iterates over each link of @ap according to
1329 * @mode. @link points to the current link in the loop. @link is
1330 * NULL after loop termination. ata_for_each_dev() works the same way
1331 * except that it iterates over each device of @link.
1332 *
1333 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1334 * specified when using the following shorthand notations. Only the
1335 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1336 * specified. This not only increases brevity but also makes it
1337 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1338 */
1339 #define ata_for_each_link(link, ap, mode) \
1340 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1341 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1342
1343 #define ata_for_each_dev(dev, link, mode) \
1344 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1345 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1346
1347 /**
1348 * ata_ncq_enabled - Test whether NCQ is enabled
1349 * @dev: ATA device to test for
1350 *
1351 * LOCKING:
1352 * spin_lock_irqsave(host lock)
1353 *
1354 * RETURNS:
1355 * 1 if NCQ is enabled for @dev, 0 otherwise.
1356 */
1357 static inline int ata_ncq_enabled(struct ata_device *dev)
1358 {
1359 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1360 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1361 }
1362
1363 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1364 {
1365 qc->tf.ctl |= ATA_NIEN;
1366 }
1367
1368 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1369 unsigned int tag)
1370 {
1371 if (likely(ata_tag_valid(tag)))
1372 return &ap->qcmd[tag];
1373 return NULL;
1374 }
1375
1376 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1377 unsigned int tag)
1378 {
1379 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1380
1381 if (unlikely(!qc) || !ap->ops->error_handler)
1382 return qc;
1383
1384 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1385 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1386 return qc;
1387
1388 return NULL;
1389 }
1390
1391 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1392 {
1393 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1394 }
1395
1396 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1397 {
1398 memset(tf, 0, sizeof(*tf));
1399
1400 tf->ctl = dev->link->ap->ctl;
1401 if (dev->devno == 0)
1402 tf->device = ATA_DEVICE_OBS;
1403 else
1404 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1405 }
1406
1407 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1408 {
1409 qc->dma_dir = DMA_NONE;
1410 qc->sg = NULL;
1411 qc->flags = 0;
1412 qc->cursg = NULL;
1413 qc->cursg_ofs = 0;
1414 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1415 qc->n_elem = 0;
1416 qc->err_mask = 0;
1417 qc->sect_size = ATA_SECT_SIZE;
1418
1419 ata_tf_init(qc->dev, &qc->tf);
1420
1421 /* init result_tf such that it indicates normal completion */
1422 qc->result_tf.command = ATA_DRDY;
1423 qc->result_tf.feature = 0;
1424 }
1425
1426 static inline int ata_try_flush_cache(const struct ata_device *dev)
1427 {
1428 return ata_id_wcache_enabled(dev->id) ||
1429 ata_id_has_flush(dev->id) ||
1430 ata_id_has_flush_ext(dev->id);
1431 }
1432
1433 static inline unsigned int ac_err_mask(u8 status)
1434 {
1435 if (status & (ATA_BUSY | ATA_DRQ))
1436 return AC_ERR_HSM;
1437 if (status & (ATA_ERR | ATA_DF))
1438 return AC_ERR_DEV;
1439 return 0;
1440 }
1441
1442 static inline unsigned int __ac_err_mask(u8 status)
1443 {
1444 unsigned int mask = ac_err_mask(status);
1445 if (mask == 0)
1446 return AC_ERR_OTHER;
1447 return mask;
1448 }
1449
1450 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1451 {
1452 return *(struct ata_port **)&host->hostdata[0];
1453 }
1454
1455 static inline int ata_check_ready(u8 status)
1456 {
1457 if (!(status & ATA_BUSY))
1458 return 1;
1459
1460 /* 0xff indicates either no device or device not ready */
1461 if (status == 0xff)
1462 return -ENODEV;
1463
1464 return 0;
1465 }
1466
1467 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1468 unsigned long timeout_msecs)
1469 {
1470 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1471 }
1472
1473 /* Don't open code these in drivers as there are traps. Firstly the range may
1474 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1475 > UDMA_0. Dyma ddreigiau */
1476
1477 static inline int ata_using_mwdma(struct ata_device *adev)
1478 {
1479 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1480 return 1;
1481 return 0;
1482 }
1483
1484 static inline int ata_using_udma(struct ata_device *adev)
1485 {
1486 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1487 return 1;
1488 return 0;
1489 }
1490
1491 static inline int ata_dma_enabled(struct ata_device *adev)
1492 {
1493 return (adev->dma_mode == 0xFF ? 0 : 1);
1494 }
1495
1496 /**************************************************************************
1497 * PMP - drivers/ata/libata-pmp.c
1498 */
1499 #ifdef CONFIG_SATA_PMP
1500
1501 extern const struct ata_port_operations sata_pmp_port_ops;
1502
1503 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1504 extern void sata_pmp_error_handler(struct ata_port *ap);
1505
1506 #else /* CONFIG_SATA_PMP */
1507
1508 #define sata_pmp_port_ops sata_port_ops
1509 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1510 #define sata_pmp_error_handler ata_std_error_handler
1511
1512 #endif /* CONFIG_SATA_PMP */
1513
1514
1515 /**************************************************************************
1516 * SFF - drivers/ata/libata-sff.c
1517 */
1518 #ifdef CONFIG_ATA_SFF
1519
1520 extern const struct ata_port_operations ata_sff_port_ops;
1521 extern const struct ata_port_operations ata_bmdma_port_ops;
1522 extern const struct ata_port_operations ata_bmdma32_port_ops;
1523
1524 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1525 #define ATA_PIO_SHT(drv_name) \
1526 ATA_BASE_SHT(drv_name), \
1527 .sg_tablesize = LIBATA_MAX_PRD, \
1528 .dma_boundary = ATA_DMA_BOUNDARY
1529
1530 #define ATA_BMDMA_SHT(drv_name) \
1531 ATA_BASE_SHT(drv_name), \
1532 .sg_tablesize = LIBATA_MAX_PRD, \
1533 .dma_boundary = ATA_DMA_BOUNDARY
1534
1535 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1536 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1537 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1538 extern u8 ata_sff_check_status(struct ata_port *ap);
1539 extern void ata_sff_pause(struct ata_port *ap);
1540 extern void ata_sff_dma_pause(struct ata_port *ap);
1541 extern int ata_sff_busy_sleep(struct ata_port *ap,
1542 unsigned long timeout_pat, unsigned long timeout);
1543 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1544 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1545 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1546 extern void ata_sff_exec_command(struct ata_port *ap,
1547 const struct ata_taskfile *tf);
1548 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1549 unsigned char *buf, unsigned int buflen, int rw);
1550 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1551 unsigned char *buf, unsigned int buflen, int rw);
1552 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1553 unsigned char *buf, unsigned int buflen, int rw);
1554 extern u8 ata_sff_irq_on(struct ata_port *ap);
1555 extern void ata_sff_irq_clear(struct ata_port *ap);
1556 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1557 u8 status, int in_wq);
1558 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1559 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1560 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1561 struct ata_queued_cmd *qc);
1562 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1563 extern void ata_sff_freeze(struct ata_port *ap);
1564 extern void ata_sff_thaw(struct ata_port *ap);
1565 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1566 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1567 u8 *r_err);
1568 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1569 unsigned long deadline);
1570 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1571 unsigned long deadline);
1572 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1573 unsigned long deadline);
1574 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1575 extern void ata_sff_error_handler(struct ata_port *ap);
1576 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1577 extern int ata_sff_port_start(struct ata_port *ap);
1578 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1579 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1580 unsigned long xfer_mask);
1581 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1582 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1583 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1584 extern u8 ata_bmdma_status(struct ata_port *ap);
1585 extern void ata_bus_reset(struct ata_port *ap);
1586
1587 #ifdef CONFIG_PCI
1588 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1589 extern int ata_pci_bmdma_init(struct ata_host *host);
1590 extern int ata_pci_sff_init_host(struct ata_host *host);
1591 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1592 const struct ata_port_info * const * ppi,
1593 struct ata_host **r_host);
1594 extern int ata_pci_sff_activate_host(struct ata_host *host,
1595 irq_handler_t irq_handler,
1596 struct scsi_host_template *sht);
1597 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1598 const struct ata_port_info * const * ppi,
1599 struct scsi_host_template *sht, void *host_priv);
1600 #endif /* CONFIG_PCI */
1601
1602 /**
1603 * ata_sff_busy_wait - Wait for a port status register
1604 * @ap: Port to wait for.
1605 * @bits: bits that must be clear
1606 * @max: number of 10uS waits to perform
1607 *
1608 * Waits up to max*10 microseconds for the selected bits in the port's
1609 * status register to be cleared.
1610 * Returns final value of status register.
1611 *
1612 * LOCKING:
1613 * Inherited from caller.
1614 */
1615 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1616 unsigned int max)
1617 {
1618 u8 status;
1619
1620 do {
1621 udelay(10);
1622 status = ap->ops->sff_check_status(ap);
1623 max--;
1624 } while (status != 0xff && (status & bits) && (max > 0));
1625
1626 return status;
1627 }
1628
1629 /**
1630 * ata_wait_idle - Wait for a port to be idle.
1631 * @ap: Port to wait for.
1632 *
1633 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1634 * Returns final value of status register.
1635 *
1636 * LOCKING:
1637 * Inherited from caller.
1638 */
1639 static inline u8 ata_wait_idle(struct ata_port *ap)
1640 {
1641 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1642
1643 #ifdef ATA_DEBUG
1644 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1645 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1646 status);
1647 #endif
1648
1649 return status;
1650 }
1651 #endif /* CONFIG_ATA_SFF */
1652
1653 #endif /* __LINUX_LIBATA_H__ */
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